CN118564257A - A reinforcement device for a shield tunnel passing under an existing building - Google Patents
A reinforcement device for a shield tunnel passing under an existing building Download PDFInfo
- Publication number
- CN118564257A CN118564257A CN202410787503.1A CN202410787503A CN118564257A CN 118564257 A CN118564257 A CN 118564257A CN 202410787503 A CN202410787503 A CN 202410787503A CN 118564257 A CN118564257 A CN 118564257A
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- Prior art keywords
- rod
- rotating
- groove
- rotating ring
- existing building
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- 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)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a reinforcing device for a shield tunnel to penetrate through an existing building, which comprises a protection pipe and a roughening device, wherein the roughening device comprises a rotating ring, the inner wall of the protection pipe is provided with a rotating groove, the rotating groove is rotationally connected with the rotating ring, the inner wall of the rotating groove is provided with a through groove, the outer wall of the rotating ring is hinged with a chisel rod, a rotating shaft of the chisel rod is provided with a torsion spring, and the chisel rod is limited in the through groove through a limiting device; the rotating ring is driven to rotate by the grouting device. According to the invention, the pit is drilled on the side surface of the pile by the drilling rod, the grouting device timely extrudes slurry pairs during pit drilling, the surrounding of the drilling rod and the pit is filled with slurry, and after the slurry is solidified, the protective tube is used as a main supporting structure and forms an integral reinforcing structure with the original pile, so that the settlement of a building is effectively avoided when the shield under the building passes through the tunnel.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a reinforcing device for a shield tunnel to penetrate through an existing building.
Background
When the shield tunnel penetrates through the existing building, sleeve valve pipe grouting is conducted around the house in the traditional method, the geology below the existing building is converged, and the bearing capacity of the whole geology is improved. However, due to the weight increase of the existing building, uneven settlement of the existing building is overlarge caused by poor geology below the existing building, and cracking of the wall body of the existing building to be traversed causes the existing building to become a dangerous house.
In view of this problem, there is a chinese patent of patent number CN109944593B, entitled "a method for reinforcing a shield tunnel penetrating an existing building" which provides a method for reinforcing a shield tunnel penetrating an existing building, grouting is used to wrap anchor cables to form a reinforced concrete structure carrying an existing building, grouting is completed after reaching a design strength, on one hand, a large number of anchor cables are required to provide supporting force and early tensioning is easy to cause upward cracking of soil, on the other hand, only a ring is formed between the anchor cables and the existing piles, and connection between the reinforced concrete structure formed by grouting and the piles is not firm enough.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a reinforcing device for a shield tunnel to penetrate through an existing building, so that the problems in the prior art are solved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a shield tunnel wears reinforcing apparatus of existing building under, includes pillar and roughening device, roughening device includes the swivel becket, and the pillar inner wall sets up the swivel groove, and swivel groove rotation connection swivel becket, swivel groove inner wall set up logical groove, and the outer wall hinge connection chisel rod of swivel groove, and the pivot of chisel rod sets up the torsional spring, and the chisel rod is limited in logical inslot through stop device;
The rotating ring is driven to rotate by the grouting device.
Preferably, the limiting device comprises a rubber column, the rotating ring is provided with a limiting hole, the intrados of the chisel rod is fixedly connected with the rubber column, one end of the rubber column extending into the inner side of the rotating ring from the limiting hole is provided with a boss, the diameter of the boss is larger than that of the limiting hole, the inner wall of the protective tube is fixedly connected with a cutting baffle, and the cutting baffle is arranged corresponding to the boss.
Preferably, the grouting device comprises a sleeve, one end of the sleeve is of a closed structure and is provided with a sealing sleeve, the sealing sleeve is embedded into one end of the sleeve, the other end of the sleeve is provided with a rotating column, the inner wall of the sleeve is provided with a spiral groove, a connecting ball is rotated outside the rotating column, the ball is positioned in the spiral groove, one end of the rotating column is rotationally connected with a piston column, the rotating column is fixedly connected with a push rod, one end of the push rod is rotationally connected with a rotating seat, the rotating seat is pushed in through a hydraulic device, the other end of the push rod is axially and slidably connected with a stirring rod, the stirring rod is rotationally connected with the sleeve, one end, far away from the push rod, of the stirring rod is provided with a limiting slot, the rotating ring is fixedly connected with a round rod, and the limiting slot is correspondingly arranged with the round rod;
the upper side of the sleeve is provided with a slurry inlet pipe and a slurry inlet one-way valve plate, and the closed end of the sleeve is provided with a grouting one-way valve plate.
Preferably, the two ends of the protective tube are respectively provided with an oblique anchor rod.
Preferably, inclined pipes are respectively arranged at the upper sides of two ends of the protection pipe, perforations are arranged at the lower ends of the round rods, steel strands are jointly arranged between the two inclined pipes and the perforations, and tensioning anchorage devices are arranged at the outer ends of the inclined pipes.
Preferably, the rotating ring is provided with a slag inlet groove, the chisel rod is arc-shaped and is fixedly connected with the blade at the outer side, the chisel rod is provided with a channel, and the channel is correspondingly arranged with the slag inlet groove.
The invention has the advantages that: according to the reinforcing device for the shield tunnel penetrating through the existing building, the pipe is firstly horizontally installed below the building by adopting the pipe jacking technology, the pipe is close to the pile, after the pipe is in place, on one hand, the side face of the pile is chiseled through the chiseling rod, the grouting device timely extrudes slurry pairs during chiseling, the chiseling rod and the surrounding of the chiseling hole are filled with the slurry, after the slurry is solidified, the pipe is used as a main supporting structure and forms an integral reinforcing structure with the original pile, and therefore, when the shield under the building penetrates through the tunnel, settlement of the building is effectively avoided.
According to the invention, when the ejector rod moves axially with the rotating column, the side balls of the rotating column are matched with the spiral grooves to form deflection, so that the ejector rod and the poking rod are driven to rotate, the poking rod rotates to drive the rotating ring to rotate through the limiting slot and the round rod, and when the hydraulic rod retreats, the poking rod rotates to drive the rotating ring to reversely rotate and reset through the limiting slot and the round rod, so that part of slurry overflows from the through groove while grouting is carried out in the protective tube, and soil at a local position is softened before the slurry is solidified, so that the cutting of the chiseling rod is facilitated.
According to the invention, the reinforcement cage, the binding protection tube and the inclined anchor rod are buried in the process pit, concrete is filled in the process pit, the protection tube supports the building upwards, the building is prevented from settling, the inclined tubes are respectively arranged at the upper sides of the two ends of the protection tube, the perforations are arranged at the lower ends of the round rods, the two inclined tubes and the perforations are jointly provided with the steel stranded wires, the tensioning anchor device is arranged at the outer ends of the inclined tubes, further, the steel stranded wires are subjected to reservation force tensioning through testing the soil anti-settling performance of the foundation, the two inclined tubes and the perforations form a downward arc line, the supporting force for resisting the settlement of the building is provided through the tensioning of the steel stranded wires, and the reinforcing effect of the building is improved.
Drawings
FIG. 1 is a schematic view of the basic structure of the present invention;
FIG. 2 is a schematic view, partially in section, of a protective tube of the present invention;
FIG. 3 is a partial enlarged view at E in FIG. 2
FIG. 4 is an enlarged view of a portion at F in FIG. 2;
FIG. 5 is a schematic view of the structure of the present invention buried in a foundation;
fig. 6 is a schematic view of the construction of the roughening apparatus and pile according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-6, the reinforcement device for penetrating the existing building under the shield tunnel provided by the invention comprises a protection pipe 1 and a roughening device 2, wherein a process pit 10 is excavated at two sides of the building, the protection pipe 1 is horizontally pushed into the bottom of the building from the process pit 10 through a pipe jacking technology in the prior art, the protection pipe 1 is arranged in a plurality of parts according to the bearing capacity of a foundation, the protection pipe 1 is preferably arranged close to a pile 20, the pushing position of the protection pipe 1 is close to the pile 20 of the building, the roughening device 2 comprises a rotating ring 21, a rotating groove 22 is arranged on the inner wall of the protection pipe 1, the rotating ring 21 is rotationally connected with the rotating ring 21, a through groove 23 is arranged on the inner wall of the rotating groove 22, a connecting rod 24 is hinged with the outer wall of the rotating ring 21, a torsion spring is arranged on the rotating shaft of the chisel 24, the chisel 24 is limited in the through a limiting device, the rotating ring 21 is arranged into a slag groove 211, the chisel 24 is arc-shaped and is fixedly connected with a blade 212 on the outer side, a channel 213 is arranged, and the channel 213 is correspondingly arranged with the slag groove 211;
the rotation ring 21 drives to rotate through the grouting device 4, after the limiting device removes the limitation, the chiseling rod 24 stretches out of the through groove 23, the rotation ring 21 alternately and repeatedly punches and drills forward and backward to break soil between the pile 20 and the protection tube 1, chiseling pits are formed on the pile 20, the chiseling device 2 is provided with a plurality of groups, and the chiseling pits are matched with the skeleton supporting function of the chiseling rod 24 to play a role in connecting more firmly.
Now need not to excavate the earthwork below the building to prior art's reinforcement mode, can not cause the building unstability, specifically is through excavating technology hole 10 in building both sides, adopt push pipe technique horizontal installation pillar 1 earlier in building below, pillar 1 is close to stake 20, after pillar 1 is put in place, on the one hand, carry out the hole drilling to the stake 20 side through chisel rod 24, slurry pair is in time extruded to mud jacking device 4 during the hole drilling, chisel rod 24 and hole drilling periphery, fill the thick liquid, after the thick liquid solidification, pillar 1 is as main bearing structure and forms whole reinforced structure with original stake 20, thereby shield constructs when crossing tunnel construction below the building, effectively avoid the building to subside.
As a specific embodiment of the invention, the limiting device comprises a rubber column 31, the rotating ring 21 is provided with a limiting hole 32, the intrados of the chisel rod 24 is fixedly connected with the rubber column 31, one end of the rubber column 31 extending into the inner side of the rotating ring 21 from the limiting hole 32 is provided with a boss 33, the diameter of the boss 33 is larger than that of the limiting hole 32, the inner wall of the protective tube 1 is fixedly connected with a cutting baffle 34, and the cutting baffle 34 is arranged corresponding to the boss 33.
In this embodiment, the rotating ring 21 rotates relative to the protection tube 1, the boss 33 on the inner wall of the rotating ring 21 approaches the cutting baffle 34 and is finally cut off by the cutting baffle, the rubber column 31 losing the boss 33 loses the limit function on the drilling rod 24, the outer cambered surface of the drilling rod 24 is attached to the soil outside the through groove 23 under the action of the torsion spring, the hard alloy blade 212 on the outer cambered surface of the drilling rod 24 repeatedly scrapes the soil along with the repeated forward and backward rotation of the rotating ring 21, the cut soil enters the protection tube 1 through the channel 213 and the slag inlet 211, the drilling rod 24 finally drills to the side surface of the pile 20 to form a pit along with the complete expansion of the drilling rod 24, the channel 213 and the slag inlet 211 extrude slurry outwards, the drilling rod 24 and the periphery of the pile 20 form grouting reinforcement, the horizontal protection tube 1 and the original pile 20 form a whole, the supporting force on the building is improved, and the influence of the shield tunnel at the bottom of the building is counteracted.
As a specific embodiment of the present invention, the grouting device 4 comprises a sleeve 41, one end of the sleeve 41 is in a closed structure and is provided with a sealing sleeve 42, the sealing sleeve 42 is embedded into one end of the sleeve 41, the other end of the sleeve 41 is provided with a rotating column 43, the inner wall of the sleeve 41 is provided with a spiral groove, the outer side of the rotating column 43 is rotationally connected with a ball 45, the ball 45 is positioned in the spiral groove, one end of the rotating column 43 is rotationally connected with a piston column 46, the rotating column 43 is fixedly connected with a push rod 47, one end of the push rod 47 is rotationally connected with a rotating seat 48, the other end of the push rod 47 is axially and slidably connected with a stirring rod 49, the stirring rod 49 is rotationally connected with the sleeve 41, one end of the stirring rod 49 far away from the push rod 47 is provided with a limiting slot 491, the rotating ring 21 is fixedly connected with a round rod 492, and the limiting slot 491 is correspondingly arranged with the round rod 492;
The rotating seat 48 is fixed with a hydraulic rod of the hydraulic device through a flange, when the hydraulic rod pushes, the rotating seat 48 does not rotate, when the ejector rod 47 moves axially with the rotating column 43, the side surface ball 45 of the rotating column 43 is matched with the spiral groove to form deflection, so that the ejector rod 47 and the poking rod 49 are driven to rotate, the poking rod 49 rotates to drive the rotating ring 21 to rotate through the limiting slot 491 and the round rod 492, when the hydraulic rod retreats, the poking rod 49 rotates to drive the rotating ring 21 to reversely rotate and reset through the limiting slot 491 and the round rod 492, when one side of the hydraulic rod presses slurry into the protective tube 1, part of slurry overflows outwards from the through groove 23, and before the slurry is solidified, the soil body at a local position is softened, and the cutting of the chiseling rod 24 is facilitated.
The upper side of the sleeve 41 is provided with a grouting pipe 411 and a grouting one-way valve plate, the closed end of the sleeve 41 is provided with a grouting one-way valve plate 412, the grouting one-way valve plate and the grouting one-way valve plate 412 are of a structure in the prior art, as shown in fig. 3, the closed end of the sleeve 41 is provided with a through hole, the grouting one-way valve plate 412 covers the through hole, one side of the grouting one-way valve plate 412 is fixedly connected with a sliding rod, the sliding rod penetrates through the end cover of the sleeve 41 to be provided with a baffle, a first spring is fixedly connected between the baffle and the end cover of the sleeve 41, the piston column 46 moves to push slurry to the end cover of the sleeve 41, the grouting one-way valve plate 41 is jacked, and when the piston column 46 is far away from the end cover of the sleeve 41, the first spring is reset to enable the grouting one-way valve plate 412 to cover the through hole again, so that grouting reinforcement is carried out from the protection pipe 1 to the position of the chisel rod 24.
In this embodiment, the chiseling rod 24 digs soil and the pit, the slurry spreads outwards from the through groove 23, and firstly softens (the slurry contains water) at the local position, so that the chiseling rod 24 is easy to scrape soil, and after the slurry solidifies, the soil body is combined around the protection pipe 1, the pile 20 and the chiseling rod 24 to form a reinforcing block, so that the foundation is reinforced, and meanwhile, the chiseling rod is integrated with the original pile 20, so that the supporting and reinforcing effects are more outstanding.
As a further embodiment of the invention, the two ends of the protection tube 1 are respectively provided with the inclined anchor rods 5, the inclined anchor rods 5 are anchored to the outer areas of the building and the shield tunnel, finally, a reinforcement cage, a binding protection tube 1 and the inclined anchor rods 5 are embedded in the process pit 10, concrete is filled in the process pit 10, the protection tube 1 supports the building upwards to prevent the building from settling, the inclined tubes 6 are respectively arranged on the upper sides of the two ends of the protection tube 1, the lower ends of the round rods 492 are provided with the perforations 61, the two inclined tubes 6 and the perforations 61 are jointly provided with steel strands, the outer ends of the inclined tubes 6 are provided with tensioning anchors, further, the steel strands are reserved by testing the anti-settling performance of foundation soil, the two inclined tube tensioning 6 and the perforations 61 form a downward arc line, and the supporting force for resisting the settling of the building is provided by the steel strands, so that the reinforcing effect of the building is improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410787503.1A CN118564257A (en) | 2024-06-18 | 2024-06-18 | A reinforcement device for a shield tunnel passing under an existing building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410787503.1A CN118564257A (en) | 2024-06-18 | 2024-06-18 | A reinforcement device for a shield tunnel passing under an existing building |
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| Publication Number | Publication Date |
|---|---|
| CN118564257A true CN118564257A (en) | 2024-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410787503.1A Pending CN118564257A (en) | 2024-06-18 | 2024-06-18 | A reinforcement device for a shield tunnel passing under an existing building |
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| CN (1) | CN118564257A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120139877A (en) * | 2025-04-10 | 2025-06-13 | 郑州交通发展投资集团有限公司 | A subway tunnel segment correction device |
-
2024
- 2024-06-18 CN CN202410787503.1A patent/CN118564257A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120139877A (en) * | 2025-04-10 | 2025-06-13 | 郑州交通发展投资集团有限公司 | A subway tunnel segment correction device |
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