CN115788501A - Deformation repairing and reinforcing method for subway operation tunnel - Google Patents
Deformation repairing and reinforcing method for subway operation tunnel Download PDFInfo
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- CN115788501A CN115788501A CN202211677656.8A CN202211677656A CN115788501A CN 115788501 A CN115788501 A CN 115788501A CN 202211677656 A CN202211677656 A CN 202211677656A CN 115788501 A CN115788501 A CN 115788501A
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Abstract
The application provides a deformation repairing and reinforcing method for a subway operation tunnel, which comprises the following steps: manufacturing a new steel pipe sheet; the subway tunnel reinforcing vehicle is pulled to a reinforcing area of the subway operation tunnel through a rail vehicle, and support equipment in the reinforcing area is temporarily dismounted; performing seepage-stopping and leakage-stopping treatment on the circular seams and longitudinal seams of the old pipe sheets in the reinforcing area; sequentially mounting a plurality of new steel pipe pieces on the surface of the damaged old pipe piece in the reinforcing area; performing ring welding on a plurality of new steel pipe sheets; carrying out anti-corrosion treatment on the new steel pipe sheet; injecting epoxy resin between the new steel pipe sheet and the old steel pipe sheet; and removing the subway tunnel reinforcing vehicle and driving the subway tunnel reinforcing vehicle back to the maintenance base. According to the method, the damaged old pipe piece is reinforced by the new steel pipe piece in the tunnel, the annular new steel pipe piece is used as a permanent reinforcing structure of the tunnel, and epoxy resin is poured into the annular seam and the longitudinal seam of the old pipe piece of the tunnel, so that a plurality of waterproof lines are formed, good water leakage plugging is ensured, and the effects of reinforcing the subway operation tunnel and preventing leakage are achieved.
Description
Technical Field
The application relates to the field of building construction, in particular to a deformation repairing and reinforcing method for a subway operation tunnel.
Background
The urban rail transit system is taken as a key link for urban underground space construction, leap-type progress is made at present, and the total operation mileage of the urban rail transit system in China is increased explosively.
The shield tunnel segment is often influenced by various adverse factors such as complex underground stress action, chemical substance erosion, underground water spreading and the like under the complex and severe environment of an underground space, so that the tunnel structure has the phenomena of cracks, material degradation, water leakage and the like, and serious social and economic losses are caused. The segment of the shield tunnel is an important component for ensuring the safe operation of a tunnel structure system, and once cracking occurs, potential safety hazards are caused to the normal use of the tunnel, and a series of difficult problems of high construction difficulty, high safety risk, large economic loss and the like exist in the process of cracking the tunnel.
In recent years, with the increase of the operation life of the shield tunnel of the urban subway, tunnel diseases discovered in daily detection are gradually increased, and the tunnel diseases can be mainly divided into two types of partial damage and integral large deformation of a tunnel structure; the tunnel structure is characterized in that local damage comprises water leakage, cracks, unfilled corners and the like, and the tunnel structure is integrally deformed greatly, and comprises joint opening, segment staggering, segment deformation and the like; meanwhile, the normal operation of the shield tunnel can be influenced by the local damage of the structure, the normal driving safety can be influenced if the continuous development is carried out, and the safety bearing of the shield tunnel structure can be greatly threatened by the large deformation of the tunnel structure.
Aiming at the problem of large integral deformation in a tunnel structure, the actual reinforcing mode in the current engineering is mainly the following mode: adopt the reinforced mode of internal expanding steel ring to carry out the later stage reinforcement to the section of jurisdiction structure, the follow-up deformation of control structure. However, the existing steel pipe sheet installation equipment has single function and low automation rate, auxiliary equipment such as cables, pipelines and brackets need to be removed when the steel pipe sheets are installed, the efficiency of entering and exiting the tunnel of the steel pipe sheet installation equipment is low, and the labor intensity is high.
Disclosure of Invention
The application provides a deformation repairing and reinforcing method for a subway operation tunnel, and aims to solve the problems that an existing subway tunnel is low in reinforcing construction efficiency and poor in reinforcing effect.
The technical scheme of the application is as follows:
a deformation repairing and reinforcing method for a subway operation tunnel comprises the following steps:
s1, manufacturing a new steel pipe sheet;
s2, a subway tunnel reinforcing vehicle is pulled to a reinforcing area of the subway operation tunnel through a rail vehicle, and support equipment in the reinforcing area is temporarily dismounted;
s3, performing seepage-stopping and leakage-stopping treatment on the circular seams and the longitudinal seams of the old pipe sheets in the reinforcing area;
s4, sequentially mounting a plurality of new steel pipe pieces on the surface of the damaged old pipe piece in the reinforcing area;
s5, performing ring welding on the plurality of new steel pipe sheets;
s6, performing anticorrosion treatment on the new steel pipe sheet;
s7, injecting epoxy resin between the new steel pipe piece and the old pipe piece;
and S8, removing the subway tunnel reinforcement vehicle and driving the subway tunnel reinforcement vehicle back to the maintenance base.
As an aspect of the present invention, in step S1, the manufacturing of the new steel pipe sheet includes: carrying out numerical control blanking on each ring of the new steel pipe sheet according to a design drawing, bending the blanked new steel pipe sheet by a steel plate bending machine according to the drawing requirement, and carrying out size rechecking and adjustment; coating the formed new steel pipe sheet; and marking the new steel pipe sheets after each piece of steel pipe sheet is processed in sequence.
As a technical scheme of the application, in step S2, the new steel pipe sheet to be installed and the maintenance tool are mounted on the subway tunnel reinforcing vehicle; the subway tunnel reinforcement vehicle is connected with the rail car and connected with an air pipe; after the operation tunnel is determined to be powered off, the subway tunnel reinforcing vehicle is pulled to the reinforcing area through the rail vehicle, and position butt joint is carried out; connecting a cable joint of the subway tunnel reinforcement vehicle into a tunnel junction box; pulling out a locking pin of the subway tunnel reinforcing vehicle, rotating a hydraulic support leg of the subway tunnel reinforcing vehicle by 90 degrees, starting a pump station of the subway tunnel reinforcing vehicle, extending out the hydraulic support leg, and supporting the hydraulic support leg on the inclined plane of the old segment; temporarily removing the rack equipment in the reinforced area.
As a technical scheme of the application, in step S3, polishing the circular seams and the longitudinal seams on the old pipe sheets, and painting epoxy resin base oil; drilling holes at intervals at the joints of the old pipe pieces, extruding epoxy mastic into the drilled holes, and inserting plastic rods into the drilled holes to extrude mastic so as to seal the joints of the old pipe pieces; and embedding grouting nozzles in the circular seams and the longitudinal seams of the old pipe sheets, and grouting from bottom to top through the grouting nozzles so as to fill the whole seams of the old pipe sheets with grout.
As one technical solution of the present application, in step S4, first new steel pipe pieces are symmetrically installed below two opposite sides of the tunnel: hoisting one end of the first new steel pipe piece by using a fixed upright post rotating crane so as to enable the first new steel pipe piece to be in a vertical state, conveying the first new steel pipe piece to an installation position by using the fixed upright post rotating crane, attaching and fixing the side surface of the first new steel pipe piece and the corresponding side surface on a sleeper plate, and attaching and fixing the arc-shaped surface of the first new steel pipe piece and the arc-shaped surface of the corresponding old pipe piece; and symmetrically installing second new steel pipe sheets in the middle parts of two sides of the tunnel respectively: hoisting the second new steel pipe sheet by the fixed upright post rotary crane, clamping the second new steel pipe sheet by a mechanical arm and conveying the second new steel pipe sheet to the top of the tunnel, attaching the second new steel pipe sheet to the inner wall of the tunnel and penetrating through the pipeline on the side wall of the tunnel from top to bottom, conveying the two second new steel pipe sheets to installation positions, adjusting the posture of the second new steel pipe sheet so as to align the second new steel pipe sheet with the corresponding first new steel pipe sheet, and fixing the two second new steel pipe sheets to the corresponding installation positions by a plurality of expansion bolts respectively; installing a third new steel pipe sheet at the top of the tunnel: hoisting the third new steel pipe sheet by the fixed upright post rotating crane, clamping the third new steel pipe sheet to the top side face of the tunnel by the mechanical arm, attaching the third new steel pipe sheet to the inner wall of the tunnel, inserting the third new steel pipe sheet from the tunnel line direction, conveying the third new steel pipe sheet to an installation position, adjusting the posture of the third new steel pipe sheet so that the third new steel pipe sheet is attached to the second new steel pipe sheets installed on two sides, and fixing the third new steel pipe sheet to the installation position by a plurality of expansion bolts.
As a technical solution of the present application, in step S5, after all the new steel pipe pieces are completely installed, welding joints on the new steel pipe pieces to form a circular ring structure with all the welding joints being groove welded, and after all the new steel pipe pieces are machined and the grooves are not coated, CO is used to weld the joints on the new steel pipe pieces 2 Welding in a gas shielded welding mode; in the welding process, a joint between the first new steel pipe sheet and the second new steel pipe sheet in the middle is welded, and then a joint between the second new steel pipe sheet and the third new steel pipe sheet on the top is welded.
As a technical scheme of the application, in step S6, the new steel pipe sheet is coated before installation, the coating thickness is uniform, and the new steel pipe sheet is coated by adopting the sequence and process of two priming coats, one intermediate coat and two finishing coats, and the total thickness is greater than or equal to 200um; and after welding, polishing and coating the welding seam of each new steel pipe sheet.
The beneficial effect of this application:
the application provides a deformation repairing and reinforcing method for a subway operation tunnel, which improves the construction efficiency and reduces the labor intensity; simultaneously, it adopts the loop configuration that makes up by five new steel pipe pieces to carry out the reinforcement to the tunnel of limit shape and consolidates, and the loop configuration laminating is in the internal surface of former concrete segment, and five new steel pipe pieces welds into a whole ring, bears the load that former segment warp and bring, and then can play the effect of consolidating the tunnel effectively. In addition, epoxy resin is poured into the annular seams and the longitudinal seams of the old pipe pieces of the tunnel, a plurality of waterproof lines can be effectively formed, and good water leakage plugging is ensured, so that the effects of reinforcing the subway operation tunnel and preventing leakage are achieved, the tunnel is further reinforced, and the service life of the tunnel is prolonged.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required 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 application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic flow chart of a method for repairing and reinforcing a deformation of a subway operation tunnel according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
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 application, it should be noted that the terms "upper", "lower", and the like refer to orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
referring to fig. 1, an embodiment of the present application provides a deformation repairing and reinforcing method for a subway operation tunnel, including the following steps:
s1, manufacturing a new steel pipe sheet;
s2, the subway tunnel reinforcing vehicle is pulled to a reinforcing area of the subway operation tunnel through the rail vehicle, and an evacuation platform and support equipment in the reinforcing area are temporarily dismounted;
s3, performing seepage-stopping and leakage-stopping treatment on the circular seams and the longitudinal seams of the old pipe sheets in the reinforcing area;
s4, sequentially mounting a plurality of new steel pipe pieces on the surface of the damaged old pipe piece in the reinforcing area;
s5, performing ring welding on the plurality of new steel pipe sheets;
s6, carrying out anti-corrosion treatment on the new steel pipe sheet;
s7, injecting epoxy resin between the new steel pipe sheet and the old steel pipe sheet;
and S8, evacuating the subway tunnel reinforcing vehicle and driving back to the maintenance base.
Further, in step S1, the manufacturing of the new steel pipe piece includes the steps of: carrying out numerical control blanking on each ring of new steel pipe sheets according to a design drawing, and ensuring the external dimension of the new steel pipe sheets; bending the fed new steel pipe sheet by a steel plate bending machine according to the requirement of a drawing, and rechecking and adjusting the size; coating the formed new steel pipe sheet, wherein the edge welding part of the new steel pipe sheet is not coated temporarily; and uniformly marking each processed new steel pipe sheet in sequence.
Meanwhile, in the step S2, installing a new steel pipe sheet to be installed, an overhaul tool and other materials on a subway tunnel reinforcing vehicle, and binding firmly; the subway tunnel reinforcing vehicle is connected with a rail car and is connected with an air pipe; after the operating tunnel is determined to be powered off, the subway tunnel reinforcing vehicle is pulled to a reinforcing area through the rail vehicle, and position butt joint is carried out; connecting a cable joint of a subway tunnel reinforcement vehicle into a tunnel junction box; pulling out a locking pin of the subway tunnel reinforcing vehicle, rotating a hydraulic support leg of the subway tunnel reinforcing vehicle by 90 degrees, starting a pump station of the subway tunnel reinforcing vehicle, extending out the hydraulic support leg, and supporting the hydraulic support leg on the inclined plane of the old pipe sheet; and temporarily dismantling the evacuation platform and the support equipment in the reinforced area and moving the evacuation platform and the support equipment to the vicinity, and temporarily removing or arranging other equipment influencing construction.
In step S3, polishing the circular seams and the longitudinal seams on the old pipe sheets, and painting epoxy resin base oil; drilling holes at intervals at the joints of the old pipe pieces, extruding epoxy mastic into the drilled holes, and sealing the joints of the old pipe pieces by inserting plastic rods into the drilled holes to extrude mastic; embedding grouting nozzles on the circular seams and the longitudinal seams of the old pipe sheets for air outlet during grouting and grouting; grouting from bottom to top through a grouting nozzle so as to fill the joint of the whole old pipe sheet with grout; and after grouting is finished, removing the adhesive tape and the grouting nozzle, and performing closed construction.
In step S4, first new steel pipe pieces are first symmetrically installed below the opposite sides of the tunnel: one end of the first new steel pipe sheet is lifted by the fixed upright post rotating crane so that the first new steel pipe sheet is in a vertical state, the first new steel pipe sheet is conveyed to the installation position by the fixed upright post rotating crane, the side face of the first new steel pipe sheet is fixedly attached to the corresponding side face of the sleeper plate, and the arc face of the first new steel pipe sheet is fixedly attached to the arc face of the corresponding old steel pipe sheet. And then symmetrically installing second new steel pipe sheets in the middle parts of two sides of the tunnel respectively: the method comprises the steps of hoisting a second new steel pipe sheet by a fixed upright post rotary crane, clamping the second new steel pipe sheet by a mechanical arm and conveying the second new steel pipe sheet to the top of a tunnel, attaching the second new steel pipe sheet to the inner wall of the tunnel and penetrating through a pipeline on the side wall of the tunnel from top to bottom, conveying the two second new steel pipe sheets to installation positions, adjusting the posture of the second new steel pipe sheet to enable the second new steel pipe sheet to be aligned with a corresponding first new steel pipe sheet, drilling holes in the second new steel pipe sheet in advance, wherein the holes are distributed in two rows and are distributed at intervals along the arc length direction of the second new steel pipe sheet, the distance between adjacent drilled holes is 500mm, driving expansion bolts into the drilled holes, driving the expansion bolts into the four corners at the middle first and at the back at intervals, driving depth of the expansion bolts is 100mm, and taking measures to prevent the second new steel pipe sheet from shifting when the expansion bolts are driven, so that the two second new steel pipe sheets are fixed to the corresponding installation positions by a plurality of expansion bolts respectively. And finally, mounting a third new steel pipe sheet at the top of the tunnel: the method comprises the steps of hoisting a third new steel pipe sheet by a fixed upright post rotary crane, clamping the third new steel pipe sheet to the top side of a tunnel by a mechanical arm, attaching the third new steel pipe sheet to the inner wall of the tunnel and inserting the third new steel pipe sheet in the tunnel line direction, conveying the third new steel pipe sheet to an installation position, adjusting the posture of the third new steel pipe sheet to enable the third new steel pipe sheet to be attached to second new steel pipe sheets installed on two sides, drilling holes in the third new steel pipe sheet in advance, arranging the holes in two rows at intervals along the arc length direction of the third new steel pipe sheet, arranging expansion bolts in the holes in the sequence of driving the expansion bolts in a mode that four corners are arranged in the middle first and then four corners at intervals, arranging the driving depth of the expansion bolts to be 100mm, and taking measures to prevent the third new steel pipe sheet from shifting when the expansion bolts are driven, so that the third new steel pipe sheet is fixed to the installation position by a plurality of expansion bolts.
Further, in step S5, after all the new steel pipe pieces are completely installed, welding joints on the new steel pipe pieces to enable the first new steel pipe piece, the second new steel pipe piece and the third new steel pipe piece to form a circular ring structure, so as to play a role in reinforcing and supporting the tunnel, all the welding joints are groove welded, grooves are formed when all the new steel pipe pieces are machined, the grooves are not coated, and then CO is adopted 2 Welding in a gas shielded welding mode, wherein the new steel pipe sheet is made of Q355, the welding wire is a solid welding wire ER50-6, and the specification is phi =1.2; in the welding process, the first new steel pipe sheet and the middle part are welded firstlyAnd welding the joint between the second new steel pipe sheet and the third new steel pipe sheet at the top, wherein each welding seam is formed at one time, so that the welding is free of defects, and the surface of the welding seam is smooth. In addition, the welding is carried out by adopting a multi-pass welding mode, the backing welding current is 130-160A, the voltage is 18-20V, the welding speed is controlled to be 180-200mm/min, the welding current from the second pass to the fourth pass is 200-220A, the voltage is 20-26V, and the welding speed is controlled to be 180-220mm/min, so that the welding quality is ensured, and the welding deformation is reduced.
In step S6, coating the new steel pipe sheet before installation (reserving 5cm weld seam positions on both sides of the seam), wherein the thickness of the coating is uniform, and the coating is performed by using a sequence and process of two primer coats, one intermediate coat and two finish coats, and the total thickness is greater than or equal to 200um; after welding, the welding seam of each new steel pipe sheet is polished, splashes are removed to enable the surface of the new steel pipe sheet to be smooth, the welding seam is coated after polishing, and the coating adopts a rolling coating or brushing coating mode, so that the coating is uniform, and the pollution to air is reduced as much as possible.
Meanwhile, in step S7, after all the new steel pipe pieces are installed, the epoxy resin pressure injection filling work between the new steel pipe pieces and the old steel pipe pieces is performed, after the coating of the annular new steel pipe pieces is completed, the joints between the two sides of the new steel pipe pieces and the old steel pipe pieces are blocked by using epoxy cement, then the epoxy cement is subjected to multiple pressure injection by using an electric grouting pump to perform sufficient filling, the pressure injection is sequentially performed from bottom to top in a layering manner, and the pressure injection is stopped until the top preformed hole overflows the resin.
And, in step S8, the evacuation platform removed temporarily is reset and installed; the maintenance tools are collected, the site is cleaned, and it is ensured that all maintenance tools and materials are completely collected and the site cannot be left. Withdrawing the hydraulic support legs on the subway tunnel reinforcing vehicle, and inserting the locking pins; and operating the fixed upright post rotary crane and the installation mechanical arm to a transportation position, extinguishing and powering off the subway tunnel reinforcement vehicle, and finally, pulling the subway tunnel reinforcement vehicle away from the subway tunnel reinforcement vehicle by the rail vehicle to drive back to the overhaul base.
In conclusion, the deformation repairing and reinforcing method for the subway operation tunnel improves construction efficiency and reduces labor intensity; simultaneously, it adopts the loop configuration that makes up by five new steel pipe pieces to carry out the reinforcement to the tunnel of limit shape and consolidates, and the loop configuration laminating is in the internal surface of former concrete segment, and five new steel pipe pieces welds into a whole ring, bears the load that former segment warp and bring, and then can play the effect of consolidating the tunnel effectively. In addition, epoxy resin is poured into the annular seams and the longitudinal seams of the old pipe pieces of the tunnel, a plurality of waterproof lines can be effectively formed, and good water leakage plugging is ensured, so that the effects of reinforcing the subway operation tunnel and preventing leakage are achieved, the tunnel is further reinforced, and the service life of the tunnel is prolonged.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. The deformation repairing and reinforcing method for the subway operation tunnel is characterized by comprising the following steps of:
s1, manufacturing a new steel pipe sheet;
s2, a subway tunnel reinforcing vehicle is pulled to a reinforcing area of the subway operation tunnel through a rail vehicle, and support equipment in the reinforcing area is temporarily dismounted;
s3, performing seepage-stopping and leakage-stopping treatment on the circular seams and the longitudinal seams of the old pipe sheets in the reinforcing area;
s4, sequentially mounting a plurality of new steel pipe pieces on the surface of the damaged old pipe piece in the reinforcing area;
s5, performing ring-forming welding on the plurality of new steel pipe sheets;
s6, performing anti-corrosion treatment on the new steel pipe sheet;
s7, injecting epoxy resin between the new steel pipe piece and the old pipe piece;
and S8, removing the subway tunnel reinforcement vehicle and driving the subway tunnel reinforcement vehicle back to the maintenance base.
2. The method for repairing and reinforcing the deformation of the subway operation tunnel according to claim 1, wherein in step S1, the manufacturing of the new steel pipe sheet comprises: carrying out numerical control blanking on each ring of the new steel pipe sheet according to a design drawing, bending the blanked new steel pipe sheet by a steel plate bending machine according to the drawing requirement, and carrying out size rechecking and adjustment; coating the formed new steel pipe sheet; and marking the new steel pipe sheets after each piece of steel pipe sheet is processed in sequence.
3. The subway operation tunnel deformation repairing and reinforcing method according to claim 1, wherein in step S2, the new steel pipe pieces and maintenance tools to be installed are mounted on the subway tunnel reinforcing vehicle; the subway tunnel reinforcement vehicle is connected with the rail car and connected with an air pipe; after the power failure of the operation tunnel is confirmed, the subway tunnel reinforcing vehicle is pulled to the reinforcing area through the rail vehicle, and position butt joint is carried out; connecting a cable joint of the subway tunnel reinforcement vehicle into a tunnel junction box; pulling out a locking pin of the subway tunnel reinforcing vehicle, rotating a hydraulic support leg of the subway tunnel reinforcing vehicle by 90 degrees, starting a pump station of the subway tunnel reinforcing vehicle, extending out the hydraulic support leg, and supporting the hydraulic support leg on the inclined plane of the old segment; temporarily removing the rack equipment in the reinforced area.
4. The method for repairing and reinforcing the deformation of the subway operation tunnel according to claim 1, wherein in step S3, the circular seams and the longitudinal seams of the old pipe pieces are polished and epoxy resin base oil is coated; drilling holes at intervals at the joints of the old pipe pieces, extruding epoxy mastic into the drilled holes, and inserting plastic rods into the drilled holes to extrude mastic so as to seal the joints of the old pipe pieces; and embedding grouting nozzles in the circular seams and the longitudinal seams of the old pipe sheets, and grouting from bottom to top through the grouting nozzles so as to fill the whole seams of the old pipe sheets with grout.
5. The method for repairing and reinforcing the deformation of the subway operation tunnel according to claim 1, wherein in step S4, first new steel pipe pieces are symmetrically installed below two opposite sides of the tunnel: hoisting one end of the first new steel pipe sheet by a fixed upright post rotating crane so as to enable the first new steel pipe sheet to be in a vertical state, conveying the first new steel pipe sheet to an installation position by the fixed upright post rotating crane, attaching and fixing the side surface of the first new steel pipe sheet and the corresponding side surface on a sleeper plate, and attaching and fixing the arc surface of the first new steel pipe sheet and the arc surface of the corresponding old pipe sheet; and symmetrically installing second new steel pipe sheets in the middle parts of two sides of the tunnel respectively: hoisting the second new steel pipe sheet by the fixed upright post rotary crane, clamping the second new steel pipe sheet by a mechanical arm and conveying the second new steel pipe sheet to the top of the tunnel, attaching the second new steel pipe sheet to the inner wall of the tunnel and penetrating through the pipeline on the side wall of the tunnel from top to bottom, conveying the two second new steel pipe sheets to installation positions, adjusting the posture of the second new steel pipe sheet so as to align the second new steel pipe sheet with the corresponding first new steel pipe sheet, and fixing the two second new steel pipe sheets to the corresponding installation positions by a plurality of expansion bolts respectively; installing a third new steel pipe sheet at the top of the tunnel: hoisting the third new steel pipe sheet by the fixed upright post rotating crane, clamping the third new steel pipe sheet to the top side face of the tunnel by the mechanical arm, attaching the third new steel pipe sheet to the inner wall of the tunnel, inserting the third new steel pipe sheet from the tunnel line direction, conveying the third new steel pipe sheet to an installation position, adjusting the posture of the third new steel pipe sheet so that the third new steel pipe sheet is attached to the second new steel pipe sheets installed on two sides, and fixing the third new steel pipe sheet to the installation position by a plurality of expansion bolts.
6. The method for repairing and reinforcing the deformation of the subway operation tunnel according to claim 5, wherein in step S5, after all the new steel pipes are completely installed, each new steel pipe is weldedThe first new steel pipe sheet, the second new steel pipe sheet and the third new steel pipe sheet form a circular ring structure, all welding seams are groove welded, grooves are formed when all new steel pipe sheets are machined, the grooves are not coated, and then CO is adopted 2 Welding in a gas shielded welding mode; in the welding process, a joint between the first new steel pipe sheet and the second new steel pipe sheet in the middle is welded, and then a joint between the second new steel pipe sheet and the third new steel pipe sheet on the top is welded.
7. The method for repairing and reinforcing the deformation of the subway operation tunnel according to claim 1, wherein in step S6, the new steel pipe sheet is coated before installation, the thickness of the coating is uniform, the coating is performed by adopting the sequence and the process of two primer coats, one intermediate coat and two finish coats, and the total thickness is greater than or equal to 200um; and after welding, polishing and coating the welding seam of each new steel pipe sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211677656.8A CN115788501A (en) | 2022-12-26 | 2022-12-26 | Deformation repairing and reinforcing method for subway operation tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211677656.8A CN115788501A (en) | 2022-12-26 | 2022-12-26 | Deformation repairing and reinforcing method for subway operation tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115788501A true CN115788501A (en) | 2023-03-14 |
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ID=85426770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211677656.8A Pending CN115788501A (en) | 2022-12-26 | 2022-12-26 | Deformation repairing and reinforcing method for subway operation tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115788501A (en) |
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2022
- 2022-12-26 CN CN202211677656.8A patent/CN115788501A/en active Pending
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