CN113236295A - Construction method of intensive tunnel embedded channel - Google Patents
Construction method of intensive tunnel embedded channel Download PDFInfo
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- CN113236295A CN113236295A CN202110449628.XA CN202110449628A CN113236295A CN 113236295 A CN113236295 A CN 113236295A CN 202110449628 A CN202110449628 A CN 202110449628A CN 113236295 A CN113236295 A CN 113236295A
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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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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Abstract
The invention relates to the technical field of tunnel embedded channel construction, and provides a construction method of a tunnel intensive embedded channel, wherein an inverted arch and an arch wall are arranged in a tunnel, and the construction method comprises the following steps: a. pouring concrete into the inverted arch; b. positioning and installing the initial circumferential reinforcing steel bars of the arch wall, and then positioning and installing the rest circumferential reinforcing steel bars of the arch wall by using a circumferential reinforcing steel bar positioning fixture; c. positioning and installing initial longitudinal steel bars of the arch wall, and then positioning and installing the rest longitudinal steel bars of the arch wall by using a longitudinal steel bar positioning fixture; d. and installing the pre-buried channel. According to the invention, the annular reinforcing steel bars and the longitudinal reinforcing steel bars in the tunnel arch wall are accurately positioned, and then the embedded channel is installed, so that collision between the embedded channel and the reinforcing steel bars is avoided on the basis of ensuring the installation precision of the reinforcing steel bars in the arch wall, and the installation efficiency and the installation quality of the embedded channel are ensured.
Description
Technical Field
The invention relates to the technical field of tunnel embedded channel construction, in particular to a construction method of an intensive tunnel embedded channel.
Background
Since various monitoring devices, pipelines, etc. are installed in the existing tunnel, it is necessary to arrange channels on the lining of the tunnel. The traditional channel is installed by drilling expansion bolts on the lining, so that the anti-fatigue bearing capacity is poor and the impression effect is poor. Therefore, the design of the embedded dense channel is gradually popularized, namely, in the lining construction stage, the embedded dense loop channel is embedded on the lining, so that later-stage decoration and installation of equipment are facilitated. However, because the longitudinal steel bars and the circumferential steel bars of the lining are dense and the positioning is inaccurate, the collision between the pre-buried channel and the steel bars is easy to occur when the pre-buried channel is installed, the on-site adjustment is difficult, the time consumption is too long, and the installation quality of the pre-buried channel is influenced.
Content of application
The invention aims to provide a construction method of an intensive tunnel embedded channel, which is characterized in that by accurately positioning circumferential reinforcing steel bars and longitudinal reinforcing steel bars in a tunnel arch wall and then installing the embedded channel, on the basis of ensuring the installation precision of the reinforcing steel bars in the arch wall, the embedded channel is prevented from colliding with the reinforcing steel bars, and the installation efficiency and the installation quality of the embedded channel are ensured.
The embodiment of the invention is realized by the following technical scheme:
a construction method of an intensive pre-buried channel of a tunnel is provided, an inverted arch and an arch wall are arranged in the tunnel, and the intensive pre-buried channel of the tunnel further comprises a hoop reinforcing steel bar positioning fixture for assisting in positioning and installing hoop reinforcing steel bars and a longitudinal reinforcing steel bar positioning fixture for assisting in positioning and installing longitudinal reinforcing steel bars, wherein the construction process comprises the following steps:
a. pouring concrete into the inverted arch;
b. positioning and installing the initial circumferential reinforcing steel bars of the arch wall, and then positioning and installing the rest circumferential reinforcing steel bars of the arch wall by using a circumferential reinforcing steel bar positioning fixture;
c. positioning and installing the initial longitudinal steel bars of the arch wall, and then positioning and installing the rest longitudinal steel bars of the arch wall by using a longitudinal steel bar positioning fixture;
d. and installing the pre-buried channel.
Optionally, the step a of pouring concrete into the inverted arch includes: and positioning and installing the circumferential reinforcing steel bars at the beginning of the inverted arch, positioning and installing the rest circumferential reinforcing steel bars of the inverted arch by using the circumferential reinforcing steel bar positioning fixture, and finally pouring concrete into the inverted arch.
Optionally, after positioning and installing the circumferential reinforcing steel bar at the beginning of the arch wall in the step b, the method further comprises: and calibrating the verticality of the circumferential steel bars at the beginning of the arch wall by using a level gauge.
Optionally, the hoop reinforcing steel bar positioning fixture comprises a hoop reinforcing steel bar positioning fixture body, a plurality of clamping grooves are formed in the hoop reinforcing steel bar positioning fixture body and are arranged at intervals along the length direction of the hoop reinforcing steel bar positioning fixture body, and the positions of the plurality of clamping grooves correspond to the positions of the hoop reinforcing steel bars one by one.
Optionally, the longitudinal steel bar positioning fixture comprises a longitudinal steel bar positioning fixture body, the curvature of the longitudinal steel bar positioning fixture body is equal to that of the circumferential steel bar, a plurality of positioning columns are arranged on the longitudinal steel bar positioning fixture body at intervals along the length direction of the longitudinal steel bar positioning fixture body, and the positions of the plurality of positioning columns correspond to the positions of the longitudinal steel bar one to one.
Optionally, before the installing the pre-buried channel in step d, the method further includes: and calibrating the positioning and mounting positions of the circumferential steel bars and the longitudinal steel bars of the arch wall by using a level gauge.
Optionally, the step of installing the pre-buried channel in step d includes: and arranging a positioning hole matched with the embedded channel on the trolley template, installing the embedded channel on the trolley template through the positioning hole, and installing the embedded channel by using the trolley template.
Optionally, the pre-buried channel includes a channel body provided with a channel, and a sealing rubber strip matched with the channel in shape is arranged in the channel.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
1. according to the invention, the circumferential steel bar positioning fixture and the longitudinal steel bar positioning fixture are utilized to accurately position the circumferential steel bar and the longitudinal steel bar in the tunnel arch wall respectively, and then the embedded channel is installed, so that on the basis of ensuring the installation precision of the steel bars in the arch wall, the embedded channel is prevented from colliding with the steel bars, and the installation efficiency and the installation quality of the embedded channel are ensured.
2. The annular steel bar positioning clamp and the longitudinal steel bar positioning clamp provided by the invention are convenient to use, can realize rapid positioning of the annular steel bars and the longitudinal steel bars in the arch wall, not only are accurate in positioning, but also the time for manufacturing and installing the annular steel bars and the longitudinal steel bars is saved, and the construction period of actual construction is shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a tunnel according to an embodiment of the present invention;
fig. 2 is a schematic view of a partial structure of an arch wall after circumferential reinforcing steel bars and longitudinal reinforcing steel bars are installed according to an embodiment of the present invention;
fig. 3 is a schematic view of a partial structure of the hoop-positioning reinforcing bar clamp according to the embodiment of the present invention;
fig. 4 is a schematic structural view of a longitudinal positioning steel bar clamp according to an embodiment of the present invention;
fig. 5 is a schematic structural view of the fixing of the embedded channel and the trolley template provided by the embodiment of the invention.
Icon: 1-inverted arch, 2-arch wall, 3-circumferential steel bar positioning fixture, 31-circumferential steel bar positioning fixture body, 32-clamping groove, 4-longitudinal steel bar positioning fixture, 41-longitudinal steel bar positioning fixture body, 42-positioning column, 43-connecting column, 44-reinforcing rib, 5-embedded channel, 51-channel, 52-channel body, 53-anchor rod, 54-diamond bolt, 55-nut, 56-sealing rubber strip, 6-trolley template, 61-positioning hole, 100-circumferential steel bar and 200-longitudinal steel bar.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1 and 2, a construction method of an intensive tunnel embedded channel includes an inverted arch 1 and an arch wall 2 in a tunnel, and further includes a circumferential reinforcing steel bar positioning fixture 3 for assisting in positioning and installing a circumferential reinforcing steel bar 100 and a longitudinal reinforcing steel bar positioning fixture 4 for assisting in positioning and installing a longitudinal reinforcing steel bar 200.
Referring to fig. 3, the hoop-direction reinforcing steel bar positioning fixture 3 includes a hoop-direction reinforcing steel bar positioning fixture body 31, a plurality of slots 32 are formed in the hoop-direction reinforcing steel bar positioning fixture body 31 at intervals along the length direction of the hoop-direction reinforcing steel bar positioning fixture body 31, and the positions of the slots 32 correspond to the positions of the hoop-direction reinforcing steel bars 100 one by one. The hoop reinforcing bar location fixture body 31 of this embodiment adopts the angle steel preparation, offers draw-in groove 32 on hoop reinforcing bar location fixture body 31 according to the design interval of hoop reinforcing bar 100 of inverted arch 1 in the tunnel and the design interval of hoop reinforcing bar 100 of archwall 2, and the width of draw-in groove 32 will be greater than the diameter 5mm of hoop reinforcing bar 100, guarantees that hoop reinforcing bar 100 does not produce the interference with draw-in groove 32 between. Simultaneously, adopt the angle steel as hoop reinforcing bar positioning fixture body 31 for the draw-in groove 32 of injecing same root hoop reinforcing bar 100 includes two draw-in groove portions, and two draw-in groove portion symmetric distribution are on the angle steel, thereby realize blocking hoop reinforcing bar 100 from two positions, and fixed effect is better, and after fixed, hoop reinforcing bar positioning fixture 3 also can not move easily.
Referring to fig. 4, the longitudinal steel bar positioning fixture 4 includes a longitudinal steel bar positioning fixture body 41, and the curvatures of the longitudinal steel bar positioning fixture body 41 and the circumferential steel bar 100 are equal, that is, the bending radian of the longitudinal steel bar positioning fixture body 41 is equal to the bending radian of the circumferential steel bar 100; meanwhile, according to the designed space of the longitudinal steel bars 200 of the arch wall 2, a plurality of positioning columns 42 arranged at intervals along the length direction of the longitudinal steel bar positioning fixture body 41 are arranged on the longitudinal steel bar positioning fixture body 41, and the positions of the positioning columns 42 correspond to the positions of the longitudinal steel bars 200 one by one. The longitudinal steel bar positioning fixture body 41 of the embodiment is made of HRB400 phi 20 thread steel, and the positioning column 42 is made of HRB400 phi 8 thread steel; in addition, during manufacturing, the positioning column 42 should be welded to the longitudinal steel bar positioning fixture body 41 in the direction of gravity, so that the positioning column 42 is prevented from being perpendicular to the arc-shaped surface of the longitudinal steel bar positioning fixture body 41, and the longitudinal steel bar 200 can be better limited when the longitudinal steel bar 200 is positioned and installed; in addition, in order to improve the structural strength of the longitudinal steel bar positioning fixture 4, the longitudinal steel bar positioning fixture 4 further comprises a connecting column 43, one end of the connecting column 43 is connected with one end of the longitudinal steel bar positioning fixture body 41, the other end of the connecting column 43 is connected with the other end of the longitudinal steel bar positioning fixture body 41, a plurality of reinforcing ribs 44 arranged at intervals are arranged between the connecting column 43 and the longitudinal steel bar positioning fixture body 41, one end of each reinforcing rib 44 is connected with the longitudinal steel bar positioning fixture body 41, and the other end of each reinforcing rib 44 is connected with the connecting column 43.
The construction process for installing the embedded channel 5 comprises the following steps:
a. the inverted arch 1 is concreted, comprising: positioning and installing the circumferential steel bar 100 at the beginning of the inverted arch 1, wherein the circumferential steel bar 100 at the beginning of the inverted arch 1 plays a positioning role, and then positioning and installing the rest circumferential steel bars 100 of the inverted arch 1 by using a circumferential steel bar positioning fixture 3; specifically, after the installation of the initial hoop reinforcing bar 100 location of invert 1, go into the hoop reinforcing bar 100 card of invert 1 inception in the first draw-in groove 32 on the hoop reinforcing bar location fixture body 31, guarantee that hoop reinforcing bar location fixture body 31 is the horizontal linear attitude this moment, go into in the hoop reinforcing bar location fixture body 31 all the other hoop reinforcing bar 100 of invert 1 in proper order afterwards all the other draw-in grooves 32 on the hoop reinforcing bar location fixture body 31 in, the interval between two adjacent draw-in grooves 32 on the hoop reinforcing bar location fixture body 31 equals the design interval between two adjacent hoop reinforcing bar 100 of invert 1. Therefore, when the positioning and installation of all the circumferential reinforcing bars 100 of the inverted arch 1 are completed, the positioning and installation positions of the circumferential reinforcing bars 100 satisfy the design requirements. After all the circumferential reinforcing steel bars 100 of the inverted arch 1 are positioned, the rest reinforcing steel bars of the inverted arch 1 are manufactured, and then concrete can be poured into the inverted arch 1.
b. After the concrete poured by the inverted arch 1 is solidified to a certain degree, positioning and installing the initial circumferential steel bars 100 of the arch wall 2, wherein the initial circumferential steel bars 100 of the arch wall 2 play a positioning role, and after the positioning and installation of the initial circumferential steel bars 100 of the arch wall 2 are completed, positioning and installing the rest circumferential steel bars 100 of the arch wall 2 by using a circumferential steel bar positioning fixture 3; specifically, the method for positioning and installing the circumferential steel bars 100 of the arch wall 2 is similar to the method for positioning and installing the circumferential steel bars 100 of the inverted arch 1, and similarly, after the circumferential steel bars 100 at the beginning of the arch wall 2 are positioned and installed, the circumferential steel bars 100 at the beginning of the arch wall 2 are clamped into the first clamping grooves 32 on the circumferential steel bar positioning fixture body 31, so that the circumferential steel bar positioning fixture body 31 is ensured to be in a horizontal linear state at the moment, then, the rest circumferential steel bars 100 of the arch wall 2 are sequentially clamped into the rest clamping grooves 32 on the circumferential steel bar positioning fixture body 31, and the distance between two adjacent clamping grooves 32 on the circumferential steel bar positioning fixture body 31 is equal to the design distance between the two adjacent circumferential steel bars 100 of the arch wall 2. Therefore, when the positioning and installation of all the circumferential reinforcing bars 100 of the arch wall 2 are completed, the positioning and installation positions of the circumferential reinforcing bars 100 satisfy the design requirements.
Meanwhile, in order to further ensure that all the circumferential reinforcing steel bars 100 of the arch wall 2 are accurately positioned and installed. And b, positioning and installing the initial circumferential reinforcing steel bar 100 of the arch wall 2 in the step b, and then: the level gauge is used to calibrate the perpendicularity of the circumferential rebar 100 originating from the arch wall 2. Through the straightness that hangs down to the originated hoop reinforcing bar 100 of archwall 2, guarantee that the originated hoop reinforcing bar 100 of archwall 2 fixes a position the installation accurately, on this basis, with the originated hoop reinforcing bar 100 of archwall 2 as the remaining position of hoop reinforcing bar 100 of foundation location installation of archwall 2 also accurate.
c. After all the circumferential reinforcing steel bars 100 of the arch wall 2 are positioned and installed, positioning and installing the initial longitudinal reinforcing steel bars 200 of the arch wall 2, wherein the initial longitudinal reinforcing steel bars 200 of the arch wall 2 also play a positioning role, and after the initial longitudinal reinforcing steel bars 200 of the arch wall 2 are positioned and installed, positioning and installing the rest longitudinal reinforcing steel bars 200 of the arch wall 2 by using the longitudinal reinforcing steel bar positioning clamps 4; specifically, after the initial longitudinal steel bars 200 of the arch wall 2 are positioned and installed, the longitudinal steel bar positioning fixture body 41 of the longitudinal steel bar positioning fixture 4 is bound and positioned with the circumferential steel bars 100 of the arch wall 2; it should be noted that, a plurality of longitudinal reinforcing steel bar positioning fixtures 4 bound to the same circumferential reinforcing steel bar 100 are provided, and the plurality of longitudinal reinforcing steel bar positioning fixtures 4 are sequentially connected to form an arch shape adapted to the circumferential reinforcing steel bar 100; meanwhile, during fixed installation, longitudinal steel bar positioning fixtures 4 can be bound on a plurality of different circumferential steel bars 100 of the arch wall 2, and the initial longitudinal steel bar 200 of the arch wall 2 is ensured to be positioned at the first positioning column 42 of the longitudinal steel bar positioning fixture body 41, and the position of the initial longitudinal steel bar 200 of the arch wall 2 can be limited through the positioning column 42; then, the remaining longitudinal steel bars 200 of the arch wall 2 can be sequentially placed on the different positioning columns 42 on the longitudinal steel bar positioning fixture body 41, so that the longitudinal steel bars 200 of the arch wall 2 can be positioned and installed.
Further, before installing the insert channel 5, the method further includes: the positioning and installation positions of the circumferential reinforcing steel bars 100 and the longitudinal reinforcing steel bars 200 of the arch wall 2 are calibrated by using the gradienter. Wherein, the positioning and mounting positions of the circumferential reinforcing steel bars 100 and the longitudinal reinforcing steel bars 200 of the calibration arch wall 2 adopt a three-point positioning method, so that the positioning and mounting positions of the circumferential reinforcing steel bars 100 and the longitudinal reinforcing steel bars 200 of the arch wall 2 are ensured to be accurate.
d. After all the circumferential reinforcing steel bars 100 and the longitudinal reinforcing steel bars 200 of the arch wall 2 are positioned and installed, the embedded channel 5 can be installed. Referring to fig. 5, the pre-buried channel 5 includes a channel body 52 provided with a channel 51, an anchor rod 53 disposed at the back of the channel body 52, a diamond bolt 54 for fixing the channel body 52, and a nut 55 used in cooperation with the diamond bolt 54, a sealing rubber strip 56 matched with the channel 51 in shape is disposed in the channel 51, wherein the outer surface of the sealing rubber strip 56 is attached to the inner wall of the channel 51, and by disposing the sealing rubber strip 56, the phenomenon of slurry leakage during later-stage concrete pouring can be avoided on the basis of protecting the screw thread.
Specifically, the process of installing the insert channel 5 includes: firstly, a positioning hole 61 matched with the embedded channel 5 is formed in the trolley template 6 for installing the embedded channel 5, the channel body 52 is installed on the trolley template 6 through the positioning hole 61 by using the diamond-shaped bolt 54 of the embedded channel 5, and then the embedded channel 5 is installed by using the trolley template 6. The hoop reinforcing bar 100 and the longitudinal reinforcing bar 200 based on the arch wall 2 are accurate in positioning and installation, so that the anchor rod 53 is just positioned in the grid formed by the hoop reinforcing bar 100 and the longitudinal reinforcing bar 200 of the arch wall 2 in the installation of the embedded channel 5, the collision of the embedded channel 5 and the reinforcing bar installed on the arch wall 2 can be prevented, the trolley template 6 is prevented from being adjusted repeatedly, and the installation efficiency of the embedded channel 5 is improved while the installation quality of the embedded channel 5 is ensured.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A construction method of an intensive embedded channel of a tunnel is provided, an inverted arch and an arch wall are arranged in the tunnel, and the construction method is characterized by comprising the following steps:
a. pouring concrete into the inverted arch;
b. positioning and installing the initial circumferential reinforcing steel bars of the arch wall, and then positioning and installing the rest circumferential reinforcing steel bars of the arch wall by using a circumferential reinforcing steel bar positioning fixture;
c. positioning and installing the initial longitudinal steel bars of the arch wall, and then positioning and installing the rest longitudinal steel bars of the arch wall by using a longitudinal steel bar positioning fixture;
d. and installing the pre-buried channel.
2. The construction method of the dense pre-buried channel of the tunnel according to claim 1, wherein the concrete pouring of the inverted arch in the step a comprises: and positioning and installing the circumferential reinforcing steel bars at the beginning of the inverted arch, positioning and installing the rest circumferential reinforcing steel bars of the inverted arch by using the circumferential reinforcing steel bar positioning fixture, and finally pouring concrete into the inverted arch.
3. The construction method of the dense pre-buried channel of the tunnel according to claim 1, wherein the step b further comprises, after positioning and installing the circumferential steel bar at the beginning of the arch wall: and calibrating the verticality of the circumferential steel bars at the beginning of the arch wall by using a level gauge.
4. The construction method of the intensive tunnel embedded channel according to claim 1, wherein the hoop reinforcement positioning fixture comprises a hoop reinforcement positioning fixture body, a plurality of clamping grooves are formed in the hoop reinforcement positioning fixture body at intervals along the length direction of the hoop reinforcement positioning fixture body, and the positions of the clamping grooves correspond to the positions of the hoop reinforcements one to one.
5. The construction method of the intensive tunnel embedded channel according to claim 1, wherein the longitudinal steel bar positioning fixture comprises a longitudinal steel bar positioning fixture body, the curvature of the longitudinal steel bar positioning fixture body is equal to that of the circumferential steel bar, a plurality of positioning columns are arranged on the longitudinal steel bar positioning fixture body at intervals along the length direction of the longitudinal steel bar positioning fixture body, and the positions of the positioning columns correspond to the positions of the longitudinal steel bar one to one.
6. The method of claim 1, wherein the step of installing the gallery further comprises: and calibrating the positioning and mounting positions of the circumferential steel bars and the longitudinal steel bars of the arch wall by using a level gauge.
7. The construction method of the tunnel-intensive insert channel according to claim 1, wherein the step of installing the insert channel in the step d comprises: and arranging a positioning hole matched with the embedded channel on the trolley template, installing the embedded channel on the trolley template through the positioning hole, and installing the embedded channel by using the trolley template.
8. The construction method of the tunnel intensive pre-buried channel according to claim 1 or 7, wherein the pre-buried channel comprises a channel body provided with a channel, and a sealing rubber strip matched with the shape of the channel is arranged in the channel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116181365A (en) * | 2022-12-30 | 2023-05-30 | 中铁二局集团有限公司 | Built-in channel with limiting device and mounting method thereof |
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| CN109931076A (en) * | 2017-12-19 | 2019-06-25 | 刘富全 | A kind of pre-buried channel flow |
| CN108590756A (en) * | 2018-02-01 | 2018-09-28 | 中铁十二局集团有限公司 | A kind of railway contact line pre-buried channel flow mounting process |
| CN208122860U (en) * | 2018-04-18 | 2018-11-20 | 中铁十六局集团第二工程有限公司 | A kind of reserved circumferential reinforcement positioning fixture of tunnel inverted arch |
| CN209011847U (en) * | 2018-09-29 | 2019-06-21 | 中铁二院昆明勘察设计研究院有限责任公司 | Spray based on friction energy-dissipating stringer is mixed-and steelframe integrally allows change just branch structure |
| CN209523763U (en) * | 2018-12-10 | 2019-10-22 | 中交一公局桥隧工程有限公司 | Positioning fixture for two-lining steel bar |
| CN109695473A (en) * | 2019-02-26 | 2019-04-30 | 安徽理工大学 | A kind of railway tunnel built-in groove channel fixing device and fixing means |
| CN110700856A (en) * | 2019-09-10 | 2020-01-17 | 甘肃路桥建设集团有限公司 | Tunnel secondary lining steel bar protective layer control construction method |
| CN111140262A (en) * | 2020-03-04 | 2020-05-12 | 辽宁科技学院 | Movable device for quickly positioning two lining steel bars in tunnel |
| CN111608698A (en) * | 2020-05-28 | 2020-09-01 | 中铁隧道局集团有限公司 | Ultra-large-span tunnel arch lining steel bar binding bracket and method |
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| CN116181365A (en) * | 2022-12-30 | 2023-05-30 | 中铁二局集团有限公司 | Built-in channel with limiting device and mounting method thereof |
| CN116181365B (en) * | 2022-12-30 | 2023-11-21 | 中铁二局集团有限公司 | Built-in channel with limiting device and mounting method thereof |
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