CN113236262B - Cantilever tunneling machine tunnel transverse channel roof-picking swivel construction method - Google Patents
Cantilever tunneling machine tunnel transverse channel roof-picking swivel construction method Download PDFInfo
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- CN113236262B CN113236262B CN202110728636.8A CN202110728636A CN113236262B CN 113236262 B CN113236262 B CN 113236262B CN 202110728636 A CN202110728636 A CN 202110728636A CN 113236262 B CN113236262 B CN 113236262B
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- 238000010276 construction Methods 0.000 title claims abstract description 32
- 230000005641 tunneling Effects 0.000 title claims description 13
- 239000006260 foam Substances 0.000 claims description 30
- 239000002002 slurry Substances 0.000 claims description 29
- 238000009412 basement excavation Methods 0.000 claims description 28
- 238000005553 drilling Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 5
- 238000011161 development Methods 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000002360 explosive Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The application relates to the field of tunnel construction, in particular to a cantilever tunneller tunnel transverse channel top-picking swivel construction method, which comprises the following steps: s1, excavating a small pilot tunnel in a first direction of a second pilot tunnel in a top picking channel by a cantilever heading machine; s2, backing the cantilever heading machine into a small pilot tunnel in the first direction of the second pilot tunnel, and excavating a second direction part of the second pilot tunnel; s3, the cantilever heading machine backs into a hole in the second direction of the second pilot tunnel, and the rest part of the second pilot tunnel in the first direction is excavated; s4, backing the cantilever heading machine into the second pilot tunnel, and excavating a small pilot tunnel forward to the first pilot tunnel; s5, backing the cantilever heading machine into a small pilot tunnel of the first pilot tunnel, and excavating a fourth direction part of the first pilot tunnel; s6, reversing the cantilever heading machine into a hole in the fourth direction of the first pilot tunnel, and excavating the rest part of the first pilot tunnel in the third direction. The technical problem that the cantilever heading machine cannot turn and excavate in a narrow top-picking channel and a 90-degree turning environment in the prior art is solved.
Description
Technical Field
The application relates to the field of tunnel construction, in particular to a cantilever tunneling machine tunnel transverse channel top-picking swivel construction method.
Background
In urban subway tunnel construction, complex construction environments, such as surrounding environments, and dense surrounding government buildings, residential buildings, gardens, buildings and other structures, are often encountered, so that in tunnel construction, in order to reduce the influence on the surrounding environments, a non-explosive excavation mode is generally adopted for construction.
The crushing head construction mode is a mode of non-blasting excavation, but if the rock stratum is too hard, the excavation efficiency is extremely low, so the construction mode using the crushing head is also unrealistic.
The water mill drill construction mode is a non-blasting excavation mode, but new equipment is needed, the flow is complicated, the cost is high, the excavation efficiency is low, and the construction mode using the water mill drill is also unrealistic.
The cantilever heading machine excavation is a common construction mode in non-explosive excavation construction, and the existing construction mode generally has the following problems due to the distribution design of channels of subway stations: after the underground excavation station roof-picking section is successfully excavated by the cantilever tunnelling machine in the subway station construction channel, the narrow roof-picking channel, the roof-picking channel and the pilot tunnel are 90 degrees, meanwhile, the operation space of the underground excavation tunnel is narrow, the cantilever tunnelling machine body is huge, and thus the cantilever tunnelling machine cannot transfer the pilot tunnel for 90 degrees from the roof-picking channel, and challenges are caused to site construction. If the heading machine forcedly turns and digs the pilot tunnel from the top-picking channel, the wall body on the pilot tunnel can be damaged due to large area digging, and the safety of the pilot tunnel is seriously affected.
Disclosure of Invention
The application aims to provide a cantilever tunneling machine tunnel transverse channel top-picking swivel construction method, which aims to solve the technical problem that a cantilever tunneling machine cannot perform turning excavation in a narrow top-picking channel and a 90-degree turning environment in the prior art.
In order to achieve the above purpose, the application adopts the following technical scheme: the cantilever development machine tunnel transverse channel top-picking swivel construction method is used for completing excavation of a first pilot tunnel and a second pilot tunnel which are arranged in parallel, and comprises the following steps:
s1, a cantilever heading machine obliquely excavates a small pilot tunnel in a first direction of a second pilot tunnel in a top picking channel, and in the excavating process, the inner wall part of the second pilot tunnel, which is close to the end part of the top picking channel, is scraped;
s2, backing the cantilever heading machine into a small pilot tunnel in the first direction of the second pilot tunnel, and after the heading machine is righted, excavating a second direction part of the second pilot tunnel, wherein the first direction is opposite to the second direction;
s3, the cantilever heading machine backs up into the hole in the second direction of the dug pilot tunnel, the rest part of the pilot tunnel in the first direction is dug, and the rest part of the pilot tunnel in the first direction is dug through;
s4, backing the cantilever heading machine into the excavated second pilot tunnel, obliquely excavating a small pilot tunnel forward to the first pilot tunnel direction, and cutting off the inner wall part of the first pilot tunnel close to the end part of the top picking channel in the excavating process; defining a small pilot tunnel of the first pilot tunnel as a third directional part of the first pilot tunnel;
s5, the cantilever heading machine backs up into the small pilot tunnel of the first pilot tunnel which is already excavated, and excavates a fourth direction part of the first pilot tunnel, wherein the third direction is opposite to the fourth direction;
s6, the cantilever heading machine backs up the hole in the fourth direction of the excavated pilot tunnel, excavates the rest part of the pilot tunnel in the third direction, and excavates the rest part of the pilot tunnel in the third direction.
The principle and the advantages of the scheme are as follows: through this scheme has realized cantilever entry driving machine and has chosen the top passageway in the stenosis and can turn normal excavation under 90 turning environment, through six step excavation schemes, from the scheme implementation circumstances, this scheme implementation safety, work efficiency are high, the super dig is little, and is little to the damage of guide hole tip inner wall and guide hole tip inner wall No. two. Compared with other non-explosive underground excavation station standard sections which are adopted in the same way, the construction channel enters the station turning section, the time for excavating and centering the cantilever tunnelling machine exceeds one month, and the implementation of the scheme is only about 5-10 days, and the cantilever tunnelling machine is successfully switched into the first pilot tunnel station and the second pilot tunnel station to perform the line construction, so that the non-explosive excavation tunnel construction around the complex environment becomes possible, and the normal propulsion of subway station excavation is ensured under the conditions of tight construction period and high pressure.
Preferably, as an improvement, the first direction is the large mileage direction of the second pilot tunnel, and the second direction is the small mileage direction of the second pilot tunnel; the third direction is the small mileage direction of the first pilot tunnel, and the fourth direction is the large mileage direction of the first pilot tunnel. Therefore, the tunneling direction of the cantilever tunneling machine is reasonable.
Preferably, as a modification, each of S2, S3, S5 and S6 requires a stand support. Therefore, the tunnel construction is safer through the support of the vertical frame.
Preferably, as a modification, the boom miner is model CRT300A.
Preferably, as an improvement, after the first pilot tunnel and the second pilot tunnel are excavated, filling operation is performed on the cut portions of the end portions of the intermediate wall. Therefore, the position of the end part of the intermediate wall, which is cut off, is filled, so that the firm and stable strength of the intermediate wall can be ensured, and the safety is ensured.
Preferably, as an improvement, the filling operation comprises the following steps:
A. selecting two limiting plates, wherein a plurality of through holes are formed in the limiting plates; two limiting plates are arranged on two sides of the cut-off part of the end part of the intermediate wall, the side surfaces of the limiting plates are attached to the outer side surface of the intermediate wall, the two limiting plates are connected to form an L shape, and the intermediate wall and the two limiting plates form a filling area;
B. drilling a plurality of jacks on the partition wall through the through holes by using a drilling machine, wherein the depth of each jack is equal to the depth of the drilling machine which is propped against the outer side surface of the limiting plate;
C. the two limiting plates are taken down, and a connecting pipe is inserted into an inserting hole in the middle wall;
D. two foam plates are arranged on two sides of the cut-off part of the end part of the intermediate wall, the outer side surfaces of the foam plates are flush with the outer side surface of the intermediate wall, and the connecting pipe is inserted into the foam plates;
E. setting two limit plates on two sides of the cut-off part of the end part of the intermediate wall again, wherein the side surfaces of the limit plates are attached to the outer side surface of the intermediate wall, the side surfaces of the limit plates are attached to the side surfaces of the foam plates, the two limit plates are connected to form an L-shaped structure, and the intermediate wall and the two limit plates form a filling area;
F. filling slurry or concrete into the filling area;
G. after the slurry is primarily solidified, the limiting plate and the foam plate are sequentially removed;
H. and (3) spraying the slurry on the removed part of the foam board until the surface of the sprayed slurry is flush with the outer side surface of the intermediate wall.
When the scheme is adopted, the method has the following beneficial effects: 1. in step A and step B, the limiting plate plays the spacing effect of drill bit drilling on the partition wall, like this at drilling in-process, when rig and limiting plate offset, stop drilling to guaranteed that the distance between the bottom of every jack on the partition wall to the limiting plate all equals, guaranteed like this that the connecting pipe can just insert in the jack, a plurality of connecting pipes are located the tip in the partition wall outside can be located the coplanar, avoided the bottom of jack to the inconsistent and the tip that leads to the connecting pipe to be located the partition wall outside of distance between the limiting plate not on the coplanar, be convenient for make the surface of guniting in the H step level. 2. In the step E and the step F, the two limiting plates play a role in limiting slurry, and the slurry is limited in a filling area, so that the cut-off parts of the intermediate wall are filled. After the slurry is filled, the connecting pipe is positioned in the slurry, and the connecting pipe plays a role of reinforcing steel bars, so that the slurry is filled more firmly and stably. 3. In this scheme when filling mud, the cystosepiment is located between limiting plate and the mud, and the cystosepiment keeps apart mud and limiting plate like this, and the limiting plate can not adhere on the mud for when follow-up demolishs the limiting plate, the limiting plate is dismantled from the mud easily. In addition, the foam board is easily damaged as compared with boards made of other materials, and even if the foam board is adhered to slurry before guniting, the foam board can be removed from the slurry by damaging the foam board. 4. In addition, after the foam board is taken down from mud, the notch of the foam board thickness can be formed on the surface of the formed mud, and the notch is filled by spraying the slurry, so that the surface of the filling part of the intermediate wall is flatter by spraying the slurry. 5. Through in this scheme, fill the position that the intermediate wall tip was cut, can guarantee the firm stable intensity of intermediate wall, guarantee the security. Meanwhile, the filling mode of the scheme, namely filling in a filling mode, can be suitable for filling larger damaged parts, and is high in filling efficiency.
Drawings
Fig. 1 is a schematic diagram of the excavation top view of S1 in example 1.
Fig. 2 is a schematic diagram of the top view of the excavation of S2 in example 1.
Fig. 3 is a schematic diagram of the top view of the excavation of S3 in example 1.
Fig. 4 is a schematic diagram of the excavation top view of S4 in example 1.
Fig. 5 is a schematic diagram of the excavation top view of S5 in example 1.
Fig. 6 is a schematic diagram of the excavation top view of S6 in example 1.
Fig. 7 is a schematic top view of the intermediate wall, the limiting plate and the foam board prior to slurry filling.
Fig. 8 is a side view of the limiting plate.
Fig. 9 is a front view of the limiting plate.
Fig. 10 is a schematic top view of the intermediate wall and foam board after the slurry filling and after the removal of the stopper board in example 2.
Fig. 11 is a schematic top view of example 2 after the foam board is removed and after spraying.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: limiting plate 1, first bracing piece 2, second bracing piece 3, connecting pipe 4, foam board 5, mud filling opening 6, bottom plate 7, bolt 8, through-hole 9, spouting layer 10.
Example 1
The cantilever development machine tunnel transverse channel top-picking swivel construction method is used for completing excavation of a first pilot tunnel and a second pilot tunnel which are arranged in parallel, and comprises the following steps:
s1, as shown in FIG. 1, a cantilever tunneller excavates a small pilot tunnel (the small pilot tunnel refers to a tunnel which is not excavated) to the right and below in a first direction of a second pilot tunnel in a top-picking channel (a vertical channel in the figure), and in the excavating process, the inner wall part of the second pilot tunnel on the middle wall, which is close to the end part of the top-picking channel, is scraped, wherein the first direction in the embodiment is the right side in FIG. 1 and is also the large mileage direction; the middle partition wall refers to a partition wall between the first pilot tunnel and the second pilot tunnel;
s2, combining with the illustration of FIG. 2, backing the cantilever excavator into a small pilot tunnel in the first direction of the second pilot tunnel, straightening the excavator, then excavating a second direction part of the second pilot tunnel by the cantilever excavator in the tunneling direction, and supporting a vertical frame in the excavating process; the second direction in this embodiment is the left side in fig. 2, and is also the small mileage direction;
s3, as shown in FIG. 3, the cantilever excavator firstly backs into the hole in the second direction of the dug pilot tunnel, then excavates the rest part of the first direction of the pilot tunnel in the direction of the dug pilot tunnel, namely digs through the first direction of the pilot tunnel, and supports the vertical frame in the process of the dug pilot tunnel;
s4, as shown in FIG. 4, the cantilever excavator backs up into the hole in the first direction of the excavated second pilot tunnel, small pilot tunnels are excavated in the first pilot tunnel direction in the left front direction, and during the excavating process, the inner wall part of the end part of the first pilot tunnel on the middle wall, which is close to the top picking channel, is cut off; defining a small pilot tunnel of the first pilot tunnel as a third direction part of the first pilot tunnel, namely a left direction, namely a small mileage direction of the first pilot tunnel;
s5, referring to FIG. 5, the cantilever excavator firstly backs into the small pilot tunnel of the excavated pilot tunnel I, excavates the fourth directional part of the pilot tunnel I and supports the vertical frame in the process of excavation; the fourth direction is the right direction, namely the large mileage direction of the first pilot tunnel;
s6, as shown in FIG. 6, the cantilever excavator backs up into the hole in the fourth direction of the excavated pilot tunnel, excavates the rest of the pilot tunnel in the third direction, namely, excavates the rest of the pilot tunnel in the third direction, and supports the stand in the excavating process.
The model of the boom miner in this embodiment is CRT300A, boom miner size: 13.5m long (with slag removal shovel plate), 3.6m wide and 4m high (with operation bin). The tunneling gun head exceeds the deslagging shovel plate by 1m, and swings left and right by 1m respectively.
According to the record statistics of tunneling cycle, excavating 10-11 cubic meters of V-stage surrounding rock (sandstone and mudstone) per hour, and excavating 5-6 cubic meters of IV-stage surrounding rock (sandstone) per hour. In the excavation process of the section on the subway station, the CRT300A cantilever excavator excavates and supports 70m (40 m 2 Cross section). According to the site construction condition, when the excavation height is not more than 7m of a 70m2 section, the comprehensive working efficiency of the excavation supporting can be highest.
Example 2
In this embodiment, after the first pilot tunnel and the second pilot tunnel are excavated, the cut-off portions of the end portions of the intermediate wall are filled.
Taking the part of the second pilot tunnel with the end cut off as an example, the filling operation comprises the following steps:
A. as shown in fig. 7-9, two limiting plates 1 are selected, wherein a plurality of through holes 9 are formed in each limiting plate 1, supporting mechanisms are arranged on each limiting plate 1, and a slurry filling opening 6 is formed in the top of each limiting plate 1; as shown in fig. 7, two limiting plates 1 are disposed on both sides of the cut-off portion of the end portion of the intermediate wall, the side surfaces of the limiting plates 1 are attached to the outer side surfaces of the intermediate wall, the two limiting plates 1 are connected in an L-shape, and the intermediate wall and the two limiting plates 1 form a filling area.
B. Using a drilling machine, drilling a plurality of jacks on the middle wall by drill bits of the drilling machine sequentially through the through holes 9 on the limiting plate 1, wherein the depth of each jack is equal to the depth of the drilling machine which is propped against the outer side surface of the limiting plate 1; the depth of the jacks is equal to the distance from the bottom of each jack to the limiting plate 1 as the drilling machine abuts against the outer side surface of the limiting plate 1.
C. The two limiting plates 1 are taken down, and a connecting pipe 4 is inserted into an inserting hole in the middle wall; the connecting pipe 4 is provided with a grouting channel, and the side wall of the connecting pipe 4 is provided with a grouting hole.
D. Slurry is injected into the connecting pipe 4 through the grouting channel, the slurry flows out from the slurry outlet hole, and the flowing slurry is positioned in the jack, so that the connection between the connecting pipe 4 and the jack is realized, and the connecting pipe 4 is fixed on the partition wall; as shown in fig. 7, two foam boards 5 are provided at both sides of the cut-off portion of the end portion of the intermediate wall, the outer side surface of the foam board 5 is flush with the outer side surface of the intermediate wall, and the connection pipe 4 is inserted into the foam board 5.
E. As shown in fig. 7, two limiting plates 1 are arranged on two sides of the cut-off part of the end part of the intermediate wall again, the side surfaces of the limiting plates 1 are attached to the outer side surface of the intermediate wall, the side surfaces of the limiting plates 1 are attached to the side surfaces of the foam plates 5, the two limiting plates 1 are connected to form an L shape, and the intermediate wall and the two limiting plates 1 form a filling area; simultaneously, the two limiting plates 1 are supported and fixed through the supporting mechanism, and the limiting plates 1 are prevented from moving.
F. The filling area is filled with slurry through the slurry filling port 6 of the limiting plate 1, the filled slurry is located between the foam plate 5 and the intermediate wall, and the foam plate 5 separates the slurry from the limiting plate 1.
G. After the slurry is primarily solidified, the limiting plate 1 is removed to obtain the structure shown in fig. 10, and then the foam plate is removed.
H. As shown in fig. 11, the portion of the foam board 5 removed is gunned using a gun to form a gunite layer 10 until the surface of the gunite layer 10 is flush with the outer side of the intermediate wall.
Example 3
Referring to fig. 7-9, the supporting mechanism in this embodiment includes a base plate 7, a first supporting rod 2 and a second supporting rod 3, where the length of the first supporting rod 2 is greater than that of the second supporting rod 3, and the top ends of the first supporting rod 2 and the second supporting rod 3 are both rotatably connected to the limiting plate 1 through pins, and the top end of the first supporting rod 2 is higher than that of the second supporting rod 3. The bottom plate 7 is detachably connected and fixed on the ground through bolts 8, and the bottoms of the first support rod 2 and the second support rod 3 are fixed on the bottom plate 7 through fixing pins. From this setting has realized the support fixed to limiting plate 1, and limiting plate 1 can not empty under the support of first bracing piece 2 and second bracing piece 3 to can carry out stable spacing to the packing of mud. Between the first supporting rod 2, the limiting plate 1 and the bottom plate 7, stable triangles are formed between the second supporting rod 3, the limiting plate 1 and the bottom plate 7, and the supporting structure is more stable.
The foregoing is merely exemplary of the present application, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, and these should also be regarded as the protection scope of the present application, which does not affect the effect of the implementation of the present application and the practical applicability of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (4)
1. The construction method for cantilever development machine tunnel transverse channel top-picking swivel body is used for completing excavation of a first pilot tunnel and a second pilot tunnel which are arranged in parallel, and is characterized in that: the method comprises the following steps:
s1, a cantilever heading machine obliquely excavates a small pilot tunnel in a first direction of a second pilot tunnel in a top picking channel, and in the excavating process, the inner wall part of the second pilot tunnel, which is close to the end part of the top picking channel, is scraped;
s2, backing the cantilever heading machine into a small pilot tunnel in a first direction of a second pilot tunnel, and excavating a second direction part of the second pilot tunnel after the heading machine is righted, wherein the first direction is opposite to the second direction;
s3, the cantilever heading machine backs up into the hole in the second direction of the dug pilot tunnel, the rest part of the pilot tunnel in the first direction is dug, and the rest part of the pilot tunnel in the first direction is dug through;
s4, backing the cantilever heading machine into the excavated second pilot tunnel, obliquely excavating a small pilot tunnel forward to the first pilot tunnel direction, and cutting off the inner wall part of the first pilot tunnel close to the end part of the top picking channel in the excavating process; defining a small pilot tunnel of the first pilot tunnel as a third directional part of the first pilot tunnel;
s5, the cantilever heading machine backs up into the small pilot tunnel of the first pilot tunnel which is already excavated, and excavates a fourth direction part of the first pilot tunnel, wherein the third direction is opposite to the fourth direction;
s6, reversing the cantilever heading machine into the hole in the fourth direction of the excavated pilot tunnel, excavating the rest part of the pilot tunnel in the third direction, and excavating the rest part of the pilot tunnel in the third direction;
after the first pilot tunnel and the second pilot tunnel are excavated, filling operation is carried out on the cut-off parts of the end parts of the intermediate wall, and the filling operation comprises the following steps:
A. selecting two limiting plates, wherein a plurality of through holes are formed in the limiting plates; two limiting plates are arranged on two sides of the cut-off part of the end part of the intermediate wall, the side surfaces of the limiting plates are attached to the outer side surface of the intermediate wall, the two limiting plates are connected to form an L shape, and the intermediate wall and the two limiting plates form a filling area;
B. drilling a plurality of jacks on the partition wall through the through holes by using a drilling machine, wherein the depth of each jack is equal to the depth of the drilling machine which is propped against the outer side surface of the limiting plate;
C. the two limiting plates are taken down, and a connecting pipe is inserted into an inserting hole in the middle wall;
D. two foam plates are arranged on two sides of the cut-off part of the end part of the intermediate wall, the outer side surfaces of the foam plates are flush with the outer side surface of the intermediate wall, and the connecting pipe is inserted into the foam plates;
E. setting two limit plates on two sides of the cut-off part of the end part of the intermediate wall again, wherein the side surfaces of the limit plates are attached to the outer side surface of the intermediate wall, the side surfaces of the limit plates are attached to the side surfaces of the foam plates, the two limit plates are connected to form an L-shaped structure, and the intermediate wall and the two limit plates form a filling area;
F. filling slurry or concrete into the filling area;
G. after the slurry is primarily solidified, the limiting plate and the foam plate are sequentially removed;
H. and (3) spraying the slurry on the removed part of the foam board until the surface of the sprayed slurry is flush with the outer side surface of the intermediate wall.
2. The construction method for the cantilever tunneling machine tunnel transverse channel top-picking swivel body is characterized by comprising the following steps of: the first direction is the large mileage direction of the second pilot tunnel, and the second direction is the small mileage direction of the second pilot tunnel; the third direction is the small mileage direction of the first pilot tunnel, and the fourth direction is the large mileage direction of the first pilot tunnel.
3. The construction method for the cantilever tunneling machine tunnel transverse channel top-picking swivel according to claim 2, which is characterized by comprising the following steps: and all of S2, S3, S5 and S6 are required to be supported by the stand.
4. The construction method for the cantilever tunneling machine tunnel transverse channel top-picking swivel body is characterized by comprising the following steps of: the boom miner model is CRT300A.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110728636.8A CN113236262B (en) | 2021-06-29 | 2021-06-29 | Cantilever tunneling machine tunnel transverse channel roof-picking swivel construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110728636.8A CN113236262B (en) | 2021-06-29 | 2021-06-29 | Cantilever tunneling machine tunnel transverse channel roof-picking swivel construction method |
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| CN113236262A CN113236262A (en) | 2021-08-10 |
| CN113236262B true CN113236262B (en) | 2023-08-15 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990042715A (en) * | 1997-11-27 | 1999-06-15 | 이병철 | Mobile drilling device for tunnel |
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| CN109403985A (en) * | 2018-10-18 | 2019-03-01 | 中铁十二局集团有限公司 | The gate-type of pole weak broken wall rock layer is caunched engineering method |
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| KR19990042715A (en) * | 1997-11-27 | 1999-06-15 | 이병철 | Mobile drilling device for tunnel |
| JP2002227579A (en) * | 2001-01-26 | 2002-08-14 | Hazama Gumi Ltd | Drilling positioning method by laser beam |
| JP2009013603A (en) * | 2007-07-02 | 2009-01-22 | Shimizu Corp | Tunnel construction method |
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| CN113236262A (en) | 2021-08-10 |
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