CN117167057A - Shield tunnel reinforcing unit, reinforcing device and reinforcing method - Google Patents
Shield tunnel reinforcing unit, reinforcing device and reinforcing method Download PDFInfo
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- CN117167057A CN117167057A CN202311452021.2A CN202311452021A CN117167057A CN 117167057 A CN117167057 A CN 117167057A CN 202311452021 A CN202311452021 A CN 202311452021A CN 117167057 A CN117167057 A CN 117167057A
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- 230000008439 repair process Effects 0.000 description 5
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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
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Abstract
The invention relates to a shield tunnel reinforcing unit, a reinforcing device and a reinforcing method. The reinforcement unit includes: the support ring plate is integrally and annularly arranged between the shield tunnel and the tunnel building limit, a first gap is reserved between the support ring plate and the shield tunnel, and a second gap is reserved between the support ring plate and the tunnel building limit; the jacking mechanism is arranged at a first gap above the supporting ring plate; at least two groups of lateral movable supports are symmetrically arranged at first gaps at two sides of the support ring plate and are used for transmitting counter force of propping force applied to the shield tunnel by the propping mechanism to the shield tunnel; the two groups of foldable joints are respectively and movably connected to the two bottom ends of the supporting ring plate and can be unfolded and folded, the two groups of foldable joints are placed through a travelling mechanism in an unfolded state and can travel on the track, and the two groups of foldable joints are retracted into the second gap in a folded state. The method can be used for permanently reinforcing the tunnel with overlarge deformation, and also can be used for temporarily reinforcing the existing operation tunnel, so that the influence of the proximity construction on the existing tunnel is avoided.
Description
Technical Field
The invention relates to the technical field of deformation resistance of shield tunnels, in particular to deformation of an operation shield tunnel, and specifically relates to a shield tunnel reinforcing unit, a reinforcing device and a reinforcing method.
Background
In the operation process of the shield tunnel, the tunnel is inevitably subjected to convergence deformation due to the influence of various factors such as ground, surrounding building load and soil disturbance, surrounding engineering construction of the tunnel, tunnel engineering structure construction, subway train operation vibration and the like, and is gradually changed into a duck egg shape (vertical compression and transverse expansion) from a circular shape. Along with the increase of the tunnel operation time, the deformation is slowly concentrated, so that on one hand, a huge threat is brought to the structural safety of the tunnel, on the other hand, the tunnel is excessively converged and deformed to invade the tunnel building limit, even the equipment limit, and the operation safety is seriously threatened.
The tunnel with overlarge convergence deformation needs to be reinforced to ensure the tunnel structure and operation safety. The existing tunnel reinforcement means comprise sticking fiber cloth (FRP) inside the tunnel and sticking steel rings inside the tunnel. The fiber cloth (FRP) is stuck in the tunnel to effectively control the tensile deformation of the inner side of the tunnel, but the rigidity of the integral structure of the pipe sheet is not obviously improved, and the integral convergence deformation is not easy to control.
In addition, the sticking of the steel ring inside the tunnel has the following drawbacks: (1) A steel ring is required to be stuck on the inner contour of the cross section of the whole tunnel, so that various pipelines in the tunnel need to be migrated and operated in advance before reinforcement; (2) The steel ring pasting process is complex and more, the construction speed is low, and only one ring can be constructed after 3 days of statistics; (3) The subway tunnel skylight is short in time, and if large-scale reinforcement is needed, the subway needs to be stopped for a long time to interrupt traffic; (4) reinforcing the steel ring, wherein the steel ring has great self weight and difficult construction; (5) The steel plate is often required to be stuck, and the concrete segment structure is easy to be damaged due to the fact that the steel plate is planted and the steel plate is drilled; (6) The organic bonding material (epoxy resin glue) is easy to age, so that the reinforcing layer is cracked and peeled off and needs to be repeatedly reinforced; (7) The sticking steel ring reinforcement is generally constructed when the tunnel has excessively large deformation, and can only prevent the continuous development of the deformation, but can not recover the deformation of the tunnel, namely, the deformation of the tunnel can not be actively repaired; and (8) the reinforcing cost of the adhesive steel ring is high.
Therefore, a new member capable of reinforcing the shield tunnel during the operation of the shield tunnel needs to be proposed.
Disclosure of Invention
In view of the shortcomings of the prior art, a main object of the present invention is to provide a shield tunnel reinforcement unit, so as to perform temporary reinforcement or permanent reinforcement on an operation tunnel with excessively large convergence deformation along the interior of the tunnel without affecting the operation of the tunnel.
The technical scheme of the invention is as follows:
a shield tunnel reinforcement unit comprising:
the support ring plate is integrally and annularly arranged between the shield tunnel and the tunnel building limit, a first gap is reserved between the outer side of the support ring plate and the inner side of the shield tunnel, and a second gap is reserved between the inner side of the support ring plate and the outer side of the tunnel building limit;
the jacking mechanism is arranged in the first gap above the support ring plate along the radial direction of the shield tunnel and is used for applying jacking force to the shield tunnel in the process of reinforcing the tunnel;
at least two groups of lateral movable supports are symmetrically arranged in the first gaps at two sides of the support ring plate and are used for transmitting counter force of propping force applied to the shield tunnel by the propping mechanism to the shield tunnel;
the two groups of foldable joints are respectively and movably connected to the two bottom ends of the supporting ring plate and can be unfolded and folded, the two groups of foldable joints are placed through a travelling mechanism in an unfolded state and can travel on the track, and the two groups of foldable joints are retracted into the second gap in a folded state.
In some embodiments, the support ring plate is provided with two reinforcing sections along the axial direction of the tunnel, and each reinforcing section is symmetrically provided with four jacking mechanisms along the central line of the tunnel.
In some embodiments, the jacking mechanism comprises:
the fixed end of the hydraulic oil cylinder is fixedly connected with the supporting annular plate;
the bottom of the spherical hinge is connected with the telescopic end of the hydraulic oil cylinder;
the bottom of the oil cylinder supporting shoe is movably connected with the top of the spherical hinge;
the bottom of the gasket is connected with the top of the oil cylinder supporting shoe, and the top of the gasket is tightly attached to the inner side of the shield tunnel.
In some embodiments, the jacking mechanism further comprises:
the pressure sensor is arranged between the gasket and the oil cylinder supporting shoe; and/or
The hydraulic cylinder is connected and fixed with the support ring plate through the oil cylinder fixing base.
In some embodiments, the lateral mobile support is a lip block.
In some embodiments, the ends of the foldable joints are connected to the bottom ends of the support ring plates by a cylindrical hinge.
In some embodiments, the travelling mechanism is mounted at the bottom of the foldable joint, and two travelling mechanisms are symmetrically arranged along each reinforcing section of the support ring plate.
In some embodiments, the running gear comprises:
the fixed end of the telescopic bracket is movably connected with the foldable joint;
the roller is fixedly connected with the telescopic end of the telescopic bracket and is used for walking back and forth along the track.
A shield tunnel reinforcing device is composed of a plurality of groups of shield tunnel reinforcing units, wherein:
the shield tunnel reinforcement units are arranged at intervals in the longitudinal direction of the tunnel; or alternatively
And a plurality of groups of shield tunnel reinforcing units are closely distributed in the longitudinal direction of the tunnel.
The shield tunnel reinforcing method based on the shield tunnel reinforcing unit comprises the following steps:
s10: determining a tunnel reinforcement section and a reinforcement scheme according to the defect investigation result;
s20: according to the reinforcement scheme, the number, the distribution interval and the preset position of the shield tunnel reinforcement units are determined;
s30: assembling a shield tunnel reinforcement unit at a tunnel entrance between stations;
s40: the lateral movable supports at two sides of the shield tunnel reinforcing unit are retracted, the foldable joint is opened, and the hydraulic cylinder is retracted;
s50: the shield tunnel reinforcement unit is pulled to a preset position of a tunnel reinforcement section along a track by adopting an electric vehicle;
s60: and (3) starting a reinforcing operation: extending the lateral movable support, extending the hydraulic cylinder, locking the hydraulic cylinder after the set supporting force and displacement are achieved, and retracting the foldable joint;
s70: and after the reinforcement is finished, withdrawing the battery car.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a shield tunnel reinforcing unit, a reinforcing device and a reinforcing method. The shield tunnel reinforcing unit is used for temporarily reinforcing or permanently reinforcing the operation shield tunnel with overlarge convergence deformation in the tunnel, and the tunnel operation can be not interrupted, the tunnel deformation can be actively repaired, the reinforcing speed is high, the process is simple, the reliability is high, and the popularization and the use are easy.
According to the invention, the supporting mechanism and the lateral movable support are arranged in a first gap reserved between the outer side of the supporting ring plate and the inner side of the shield tunnel, the supporting mechanism is matched with the lateral movable support for use, and the supporting mechanism is used for supporting the inner side of the tunnel by applying supporting force, so that the deformation of the tunnel is restrained, the supporting mechanism transmits supporting counterforce to the lateral movable support through the supporting ring plate, and the lateral movable support is abutted against the inner side of the tunnel, so that the convergence deformation of the tunnel is further prevented.
According to the invention, the tunnel reinforcing section is reinforced by the support ring plate, the supporting mechanism and the lateral movable support arranged between the support ring plate and the shield tunnel, so that the tunnel is not required to be drilled and damaged, the integrity and the safety of the original tunnel structure are ensured, and the tunnel is effectively prevented from being deformed continuously.
The foldable pipe can be unfolded or folded along the end part of the support ring plate, is arranged on the track in an unfolded state, can walk along the track, can be stored in the second gap in a folded state, does not invade the tunnel equipment limit and the tunnel building limit, and ensures the normal operation of vehicles in a tunnel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims.
FIG. 1 is a schematic view (cross section) of tunnel reinforcement by a shield tunnel reinforcement unit according to some embodiments of the present invention;
FIG. 2 is a schematic view (vertical section) of a shield tunnel reinforcing apparatus according to some embodiments of the present invention;
FIG. 3 is a schematic view of a jack-up mechanism according to some embodiments of the present invention;
FIG. 4 is a schematic view of a walking mechanism according to some embodiments of the present invention;
fig. 5 is a schematic diagram of a reinforcement flow of a shield tunnel reinforcement unit according to some embodiments of the present invention.
Reference numerals illustrate:
1: shield tunnel; 11: defining tunnel buildings; 12: defining tunnel equipment; 2: a ballast bed; 3: a track; 4: a shield tunnel reinforcing unit; 41: a foldable joint; 411: a retractable stand; 412: a roller; 42: a cylindrical hinge; 43: a support ring plate; 431: a jacking mechanism; 4311: a gasket; 4312: a pressure sensor; 4313: an oil cylinder supporting shoe; 4314: spherical hinge; 4315: a hydraulic cylinder; 4316: a cylinder fixing base; 432: and a lateral movable support.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the embodiments and the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be understood that the terms "comprises/comprising," "consists of … …," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product, apparatus, process, or method as desired. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …," and the like, does not exclude the presence of other like elements in a product, apparatus, process, or method that includes the element.
It is further understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present invention and to simplify the description, and do not indicate or imply that the devices, components, or structures referred to must have a particular orientation, be configured or operated in a particular orientation, and are not to be construed as limiting the present invention.
The implementation of the present invention will be described in detail with reference to the preferred embodiments.
The shield tunnel reinforcing unit 4 is particularly suitable for operating shield tunnels, can temporarily or permanently reinforce the operating shield tunnels with overlarge convergence deformation in the tunnels, does not interrupt the operation of the tunnels, can actively repair the deformation of the tunnels, has high reinforcing speed, simple process and high reliability, and is easy to popularize and use.
Referring to fig. 1, the shield tunnel reinforcement unit 4 is disposed between the shield tunnel 1 and the tunnel construction boundary 11 for reinforcement support of the inside of the shield tunnel. Comprising a support ring plate 43, a jacking mechanism 431, at least two sets of laterally movable supports 432 and two sets of foldable joints 41.
Specifically, the supporting ring plate 43 is integrally and annularly arranged between the shield tunnel 1 and the tunnel building limit 11, a first gap g1 is reserved between the outer side of the supporting ring plate 43 and the inner side of the shield tunnel 1, and the installation of the supporting mechanism 431 and the lateral movable support 432 is facilitated; a second gap g2 is reserved between the inner side of the support ring plate 43 and the outer side of the tunnel building limit 11, so that the foldable pipe joint 41 can be conveniently stored, equipment and pipelines in the tunnel building limit 11 are prevented from being influenced, and normal operation and safety of vehicles in a tunnel are ensured.
In the present invention, the support ring plate 43 is an arc-shaped ring plate having a circumference greater than one half of the circumference.
In the present invention, the support ring plate 43 may be made of a steel material having a high rigidity.
It will be readily appreciated that tunnel building delimitation, also known as tunnel clearance, refers to the minimum necessary distance of the inner surface of the tunnel to provide a space between the nearest aisle of the vehicle and his surface. The minimum size of the tunnel is determined by both the minimum headroom determined according to the type of traffic proposed in the tunnel and other required spacing, such as ventilation pipes and lines.
In some embodiments, the width of the first gap g1 reserved between the outer side of the support ring plate 43 and the inner side of the shield tunnel 1 is gradually reduced from the upper direction to both sides of the support ring plate 43, so as to ensure that the gap between the top of the support ring plate 43 and the shield tunnel 1 is larger than the gap between the bottoms of both sides of the support ring plate 43 and the shield tunnel 1. The gap between the upper side of the supporting ring plate 43 and the shield tunnel 1 is large, so that the supporting mechanism 431 can be conveniently placed, the large gap can enable the hydraulic cylinder to have a larger stroke, and the recoverable deformation is larger when the tunnel deformation recovery is required.
The top of the supporting ring plate 43 applies a propping force to the shield tunnel 1 by arranging a propping mechanism 431 and transmits a propping reaction force to the bottom of the supporting ring plate 43, and the bottom of the supporting ring plate 43 is provided with a lateral movable support 432 which is tightly attached to the inner side of the shield tunnel 1 and supports the tunnel by the propping reaction force so as to inhibit tunnel deformation. The smaller the gap between the bottoms of the two sides of the supporting ring plate 43 and the shield tunnel 1 is, the larger the supporting force applied to the tunnel by the lateral movable support 432 is, and the capability of restraining tunnel deformation is remarkably improved.
In some embodiments, the width of the second gap g2 reserved between the inner side of the support ring plate 43 and the outer side of the tunnel building boundary 11 is not smaller than the folded width of the foldable pipe joint 41, so that the foldable pipe joint 41 does not invade the tunnel building boundary when being received in the second gap g2 in the folded state, and normal operation of vehicles in the tunnel is ensured.
In some embodiments, the surface of the supporting ring plate 43 is provided with a plurality of hollowed-out openings, and the positions and the number of the hollowed-out openings are determined according to the stress condition and the supporting strength of the supporting ring plate 43, so that appropriate hollowed-out can be performed on the premise of meeting the requirements of rigidity, deformation and stability.
According to the invention, the whole contour of the tunnel is not required to be reinforced, the support ring plate 43 of the shield tunnel reinforcing unit 4 is provided with one or more reinforcing sections for reinforcing the tunnel reinforcing section, so that the flexibility of reinforcement can be improved, pipeline migration is not required, and the construction efficiency is improved.
In some embodiments, the support ring plate 43 of the shield tunnel reinforcing unit 4 is provided with two reinforcing sections along the tunnel axis direction, each reinforcing section is symmetrically provided with at least two groups of jacking mechanisms 431 along the tunnel center line, each group is provided with one or more jacking mechanisms 431, and two groups of lateral movable supports 432, each group is provided with one lateral movable support 432.
In practical applications, the number of the propping mechanisms 431 can be encrypted or reduced according to the requirement, but the propping mechanisms 431 are ensured to be uniformly arranged along the central line of the tunnel.
The top support mechanism 431 is provided on the top outside the support ring plate 43 in the radial direction of the shield tunnel 1. The jacking mechanism 431 can be abutted against the inner side of the shield tunnel in the reinforcement process of the shield tunnel 1, so as to apply jacking force to the shield tunnel 1 in the reinforcement process of the tunnel.
Referring to fig. 1, the jacking mechanisms 431 are symmetrically arranged in groups along both sides of the tunnel center line, and two jacking mechanisms 431 are provided per group.
In some embodiments, referring to fig. 3, the jacking mechanism 431 includes a hydraulic ram 4315, a ball pivot 4314, a ram shoe 4313, and a pad 4311. The fixed end of the hydraulic cylinder 4315 is connected with the fixed end of the supporting ring plate 43, the telescopic end of the hydraulic cylinder 4315 is connected with the bottom of the spherical hinge 4314, the top of the spherical hinge 4314 is movably connected with the bottom of the cylinder supporting shoe 4313, the top of the cylinder supporting shoe 4313 is connected with the bottom of the liner 4311, and the top of the liner 4311 is tightly attached to the inner side of the shield tunnel 1.
The hydraulic cylinder 4315 can adopt displacement control and force control, and can retract the hydraulic cylinder in the moving process of the shield tunnel reinforcing unit 4, so as to avoid the contact with the inner side of the tunnel and influence the movement. In the reinforcement process of the shield tunnel 1, the hydraulic cylinder 4315 is extended until the liner 4311 is closely attached to the inner side of the tunnel, and a proper oil pressure is set, and then the hydraulic cylinder is locked, so that the inner side of the tunnel is supported, and the tunnel is prevented from continuing to be convergent and deformed.
In this embodiment, the spherical hinge 4314 is used to flexibly rotate the cylinder support shoe 4313, so as to ensure that the liner 4311 can be closely attached to the inner side of the tunnel.
In this embodiment, the cushion 4311 is a resilient cushion, and may be made of rubber or the like. In the tunnel reinforcement process, the supporting force from the hydraulic cylinder 4315 is uniformly transferred to the inner side of the tunnel through the packing 4311, preventing stress concentration and damaging the tunnel structure.
Further, the propping mechanism 431 further includes a pressure sensor 4312, and the pressure sensor 4312 is disposed between the pad 4311 and the cylinder shoe 4313.
According to the invention, the pressure sensor 4312 is arranged between the liner 4311 and the oil cylinder supporting shoe 4313, so that the supporting force of the supporting mechanism 431 on the shield tunnel 1 can be monitored in real time in the process of reinforcing the tunnel, and the tunnel is prevented from being damaged due to overlarge supporting force.
Further, the propping mechanism 431 further includes a cylinder fixing base 4316, and the cylinder fixing base 4316 is disposed at the bottom of the hydraulic cylinder 4315. The hydraulic cylinder 4315 is fixedly connected to the support ring plate 43 through the cylinder fixing base 4316, thereby transmitting the reaction force of the hydraulic cylinder 4315 to the support ring 43.
The lateral movable support 432 is symmetrically arranged at the bottom of the outer side of the support ring plate 43, and the lateral movable support 432 is of a telescopic structure.
The lateral movable support 432 can be retracted in the process of moving the shield tunnel reinforcing unit 4 along the track 3, and can extend out along two sides of the support ring plate 43 to be abutted against the inner side of the shield tunnel 1 in the process of reinforcing the tunnel, so that the support counter force when the support mechanism 431 on the support ring plate 43 supports the tunnel is transmitted to the shield tunnel 1 through the lateral movable supports 432 on two sides, and the tunnel deformation is resisted.
In some embodiments, the laterally movable support 432 may employ a support pad.
Further, a hole may be formed at a position of the support ring plate 43 corresponding to the support cushion block, and the support cushion block may be retracted to the inner side of the support ring plate 43 and fixed through the hole during the movement of the shield tunnel reinforcing unit 4; when the reinforcement work is carried out, the supporting cushion block is stretched out to be propped against the side wall of the tunnel manually or mechanically, and the locking is carried out.
According to the invention, the tunnel reinforcing section is reinforced by the support ring plate 43, the supporting mechanism 431 and the lateral movable support 432 which are arranged between the support ring plate 43 and the shield tunnel 1, so that the tunnel is not required to be drilled and damaged, the integrity and the safety of the original tunnel structure are ensured, and the tunnel is effectively prevented from being deformed continuously.
The foldable joint 41 is movably connected to the bottom end of the support ring plate 43, and the foldable joint 41 is folded or unfolded along the movable connection part of the foldable joint 41 and the support ring plate 43. The foldable joint 41 is arranged above the ballast bed 2 in an unfolded state so as to be matched with the track 3, and moves along the track 3 to a position where the tunnel needs to be reinforced. The foldable joint 41 is received in the second gap g2 in the folded state without invading the tunnel equipment limit 12 and the tunnel construction limit 11 to ensure the normal operation of the subway vehicle inside the tunnel.
In some embodiments, the collapsible joint 41 is connected to the bottom end of the support ring plate 43 by a cylindrical hinge 42. The cylindrical hinge 42 facilitates the folding and unfolding of the foldable joint 41 along the end of the support ring plate 43.
The foldable joint 41 may be mechanically locked when either the collapsed or the open state is retracted, preventing the foldable joint 41 from suddenly opening itself when the collapsed state is retracted, or suddenly retracting the collapsed itself when the open state is extended.
The foldable joint 41 may be made of steel or other materials with high rigidity.
In some embodiments, the surface of the foldable joint 41 is provided with a plurality of hollowed-out openings, and the positions and the number of the hollowed-out openings are determined according to the stress condition and the supporting strength of the foldable joint 41, so that appropriate hollowed-out can be performed on the premise of meeting the requirements of rigidity, deformation and stability.
The travelling mechanism is mounted at the bottom of the foldable joint 41 and is matched with the track 3 in the shield tunnel 1. The arrangement of the travelling mechanism facilitates the shield tunnel reinforcing unit 4 to move along the track 3 in the shield tunnel 1 to the tunnel reinforcing section.
The travelling mechanism is arranged at the bottom of the foldable joint 41, is matched with the track 3 in the unfolded state of the foldable joint 41 and moves along the track 3, and is retracted to be not invaded into the tunnel equipment limit 12 and the tunnel building limit 11 in the folded state of the foldable joint 41 so as to ensure that the subway vehicle at the inner side of the tunnel normally runs.
In some embodiments, the running gear is symmetrically arranged with 2 along each reinforcement section of the support ring plate 43.
Preferably, referring to fig. 4, each running gear includes a telescoping support 411 and a roller 412. The fixed end of the telescopic bracket 411 is hinged with the foldable joint 41, and the telescopic end of the telescopic bracket 411 is fixedly connected with the roller 412.
The telescopic support 411 is used to adjust the overall height of the shield tunnel reinforcement unit 4 so as to be adapted to different tunnels. The rollers 412 are used to walk back and forth on the track 3.
In some embodiments, the fixed end of the telescopic bracket 411 is hinged to the foldable joint 41, and can be adjusted to a position parallel to the plane of the foldable joint 41 under the condition of not using, and can be folded and stored together with the foldable joint 41, so that unnecessary occupied space is reduced, and the use efficiency is improved.
In some embodiments, the telescoping support 411 is a rubber wheel support.
In some embodiments, the roller 412 is a glue wheel.
Referring to fig. 2, the invention further provides a shield tunnel reinforcing device, which comprises a plurality of groups of shield tunnel reinforcing units 4, wherein the shield tunnel reinforcing units 4 are designed according to the width, a certain interval can be arranged between the longitudinal width and the width of the tunnel, and the shield tunnel reinforcing device can be closely adhered, and is specifically set according to the requirement of a reinforcing section.
In particular, since the tunnel ring width is generally set to 1.2m, in order to support each ring pipe sheet conveniently, the width of each shield tunnel reinforcing unit 4 is set to 1m, so that overlong width is avoided, the structure is too heavy, inconvenient transportation from the outside into the tunnel is avoided, the width is avoided to be too short, and the shield tunnel reinforcing unit 4 is unstable and easy to overturn. Of course, the device can be set according to the needs.
The tunnel reinforcing device provided by the invention not only can be used for preventing the tunnel from continuing to deform, but also can be used for carrying out the existing deformation repair on the tunnel, and in the tunnel reinforcement with larger deformation, the hydraulic cylinder can be set with proper thrust to slowly jack up the tunnel, so that the tunnel can be slowly restored to a round shape from a duck egg shape, but the repair rate is not too high, otherwise, the tunnel is easy to crack. After the repair is finished, the hydraulic cylinder is locked, so that the inner contour of the tunnel is supported, and the tunnel is prevented from convergence deformation again.
Referring to fig. 5, the invention further provides a reinforcement method based on the tunnel reinforcement unit. The reinforcement method can be used for permanently reinforcing the tunnel with overlarge deformation, and also can be used for temporarily reinforcing the existing operation tunnel, so that the influence of the proximity construction on the existing tunnel is avoided. The reinforcing method comprises the following steps:
s10: determining a tunnel reinforcement section and a reinforcement scheme according to the defect investigation result;
s20: according to the reinforcement scheme, the number, the distribution interval and the preset position of the shield tunnel reinforcement units are determined;
s30: assembling a required shield tunnel reinforcement unit at a station interval tunnel entrance;
s40: the lateral movable supports at two sides of the tunnel reinforcing device are retracted, the foldable joints are unfolded, and the hydraulic oil cylinders are retracted;
s50: the method comprises the steps that a tunnel reinforcement device is pulled to a preset position of a tunnel reinforcement section along a track by adopting an electric vehicle;
s60: and (3) starting a reinforcing operation: extending the lateral movable support, extending the hydraulic cylinder, locking the hydraulic cylinder after the set supporting force and displacement are achieved, and retracting the foldable joint;
s70: and after all the tunnel reinforcing devices reach the preset positions and the reinforcement is finished, withdrawing the storage battery car and finishing the reinforcement.
The reinforcement method provided by the invention can repair tunnel deformation under the condition of not interrupting tunnel operation, has the advantages of high reinforcement speed, simple process, high reliability and easiness in popularization and application.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. A shield tunnel reinforcing unit, comprising:
the support ring plate (43) is integrally arranged between the shield tunnel (1) and the tunnel building limit (11) in a ring shape, a first gap (g 1) is reserved between the outer side of the support ring plate (43) and the inner side of the shield tunnel (1), and a second gap (g 2) is reserved between the inner side of the support ring plate (43) and the outer side of the tunnel building limit (11);
a propping mechanism (431) arranged in the first gap (g 1) above the support ring plate (43) along the radial direction of the shield tunnel (1) and used for applying a propping force to the shield tunnel (1) in the process of reinforcing the tunnel;
at least two groups of lateral movable supports (432) symmetrically arranged in the first gaps (g 1) at two sides of the support ring plate (43) and used for transmitting counter force of propping force applied by the propping mechanism (431) to the shield tunnel (1);
two groups of foldable joints (41) are respectively and movably connected to the two bottom ends of the supporting ring plate (43) and can be unfolded and folded, and are placed through a travelling mechanism and can travel on the track (3) in an unfolded state, and are received in the second gap (g 2) in a folded state.
2. Shield tunnel reinforcement unit according to claim 1, characterized in that the support ring plate (43) is provided with two reinforcement sections in the direction of the tunnel axis, each of which reinforcement sections is symmetrically arranged with four jacking mechanisms (431) along the tunnel centre line.
3. The shield tunnel reinforcement unit according to claim 1, wherein the jacking mechanism (431) includes:
the fixed end of the hydraulic oil cylinder (4315) is fixedly connected with the supporting annular plate (43);
the bottom of the spherical hinge (4314) is connected with the telescopic end of the hydraulic oil cylinder (4315);
the bottom of the oil cylinder supporting shoe (4313) is movably connected with the top of the spherical hinge (4314);
the liner (4311), the bottom of liner (4311) with the top of hydro-cylinder support boots (4313) is connected, the top of liner (4311) with shield tunnel (1) inboard closely laminating.
4. A shield tunnel reinforcing unit according to claim 3, wherein the jacking mechanism (431) further comprises:
a pressure sensor (4312), the pressure sensor (4312) being arranged between the pad (4311) and the cylinder shoe (4313); and/or
The hydraulic oil cylinder fixing base (4316), the oil cylinder fixing base (4316) is arranged at the bottom of the hydraulic oil cylinder (4315), and the hydraulic oil cylinder (4315) is fixedly connected with the supporting annular plate (43) through the oil cylinder fixing base (4316).
5. The shield tunnel reinforcement unit of claim 1, wherein the laterally movable support (432) is a spacer block.
6. Shield tunnel reinforcement unit according to claim 1, characterized in that the ends of the foldable joints (41) are connected to the bottom end of the support ring plate (43) by means of a cylindrical hinge (42).
7. Shield tunnel reinforcing unit according to claim 2, characterized in that the travelling mechanism is mounted at the bottom of the foldable joint (41), two being symmetrically provided along each reinforcing section of the support ring plate (43).
8. The shield tunnel reinforcement unit of claim 7, wherein the travelling mechanism comprises:
the telescopic bracket (411), the fixed end of the telescopic bracket (411) is movably connected with the foldable joint (41);
the roller (412), the roller (412) is connected with the flexible end of scalable support (411) fixedly, roller (412) are used for following walk back and forth track (3).
9. Shield tunnel reinforcement device, consisting of a plurality of groups of shield tunnel reinforcement units (4) according to any one of claims 1 to 8, characterized in that:
the shield tunnel reinforcement units (4) are arranged at intervals in the longitudinal direction of the tunnel; or alternatively
The shield tunnel reinforcement units (4) are closely distributed in the longitudinal direction of the tunnel.
10. Shield tunnel reinforcement method based on a shield tunnel reinforcement unit according to any of claims 1 to 8, characterized in that it comprises the following steps:
s10: determining a tunnel reinforcement section and a reinforcement scheme according to the defect investigation result;
s20: according to the reinforcement scheme, the number, the distribution interval and the preset position of the shield tunnel reinforcement units are determined;
s30: assembling a shield tunnel reinforcement unit at a tunnel entrance between stations;
s40: the lateral movable supports at two sides of the shield tunnel reinforcing unit are retracted, the foldable joint is opened, and the hydraulic cylinder is retracted;
s50: the shield tunnel reinforcement unit is pulled to a preset position of a tunnel reinforcement section along a track by adopting an electric vehicle;
s60: and (3) starting a reinforcing operation: extending the lateral movable support, extending the hydraulic cylinder, locking the hydraulic cylinder after the set supporting force and displacement are achieved, and retracting the foldable joint;
s70: and after the reinforcement is finished, withdrawing the battery car.
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| CN202311452021.2A CN117167057B (en) | 2023-11-03 | 2023-11-03 | Shield tunnel reinforcing unit, reinforcing device and reinforcing method |
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| CN202311452021.2A CN117167057B (en) | 2023-11-03 | 2023-11-03 | Shield tunnel reinforcing unit, reinforcing device and reinforcing method |
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