A tunnel vault waterproofing secondary lining steel bar stabilizing device and stabilizing method

Abstract

The application discloses a tunnel vault waterproof secondary lining steel bar stabilizing device, which comprises a waterproof plate, a steel bar anchor rod, a sealing assembly and a fixed connecting piece, the waterproof plate is arranged close to a concrete layer of surrounding rock, the steel bar anchor rod is sequentially inserted into the surrounding rock after penetrating through the waterproof plate and the concrete layer, and is anchored with the surrounding rock and the concrete layer through anchor grout, the sealing assembly can be axially elongated and radially deformed, the sealing assembly is fixed on the steel bar anchor rod in a sealing sleeve mode, and the top end of the sealing assembly can be sealingly fixed with the waterproof plate, and the fixed connecting piece is used for connecting and fixing the secondary lining steel bar with the exposed end of the steel bar anchor rod. The stabilizing method adopts the device, the tunnel vault waterproof secondary lining steel bar stabilizing device and method have the functions of stabilizing the large-volume steel bar of the secondary lining and sealing and waterproofing the secondary lining, and thus the engineering safety is improved.

Description

Technical Field

[0001] This invention relates to the field of construction equipment technology for ultra-large cross-section tunnels, specifically to a device and method for stabilizing the reinforcing steel bars of the waterproof secondary lining at the tunnel arch. Background Technology

[0002] In recent years, an increasing number of ultra-large cross-section tunnels have emerged. During the construction of secondary linings for these tunnels, to ensure structural safety, the secondary lining is designed to be thicker, and the volume of reinforcing steel is also increasing. This increases the risk of secondary lining steel collapse accidents. If not properly controlled, these accidents can easily occur, such as steel mesh collapse and overturning, seriously affecting the safety of construction workers and causing huge economic losses to the project.

[0003] On the other hand, the existing secondary lining reinforcement stabilizers for tunnel arches do not take into account waterproofing measures during secondary lining construction. After the reinforcement penetrates the waterproofing board and passes through the concrete layer into the surrounding rock, groundwater in the surrounding rock can easily enter the secondary lining structure through the gap, posing a serious safety hazard to the engineering structure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a waterproof secondary lining reinforcement stabilization device for tunnel arches, which has the function of stabilizing large-volume reinforcement bars in the secondary lining, and at the same time can also seal and waterproof the secondary lining, thereby improving the safety of the project.

[0005] To achieve the above objectives, the present invention provides a technical solution as follows: a waterproof secondary lining reinforcement stabilization device for tunnel arches, comprising:

[0006] A waterproof membrane, wherein the waterproof membrane is installed in close contact with the concrete layer of the surrounding rock;

[0007] The steel anchor rod passes through the waterproof membrane and the concrete layer in sequence, is inserted into the surrounding rock, and is anchored to the surrounding rock and the concrete layer by anchor grout;

[0008] A sealing assembly, capable of axial elongation and radial deformation, is sealed and fixed to the reinforcing bar anchor, and its top end is sealed and fixed to the waterproof membrane; and

[0009] Fixed connectors are used to connect and fix the secondary lining steel bars to the exposed ends of the steel bar anchor rods.

[0010] Furthermore, the sealing assembly includes a fixed seal, a movable seal, and a connecting sleeve. The fixed seal is annular and is fitted onto the reinforcing bar anchor rod. The inner diameter of the fixed seal is larger than the outer diameter of the reinforcing bar anchor rod and can be sealed to the surface of the waterproof membrane. The movable seal is fixedly fitted onto the reinforcing bar anchor rod and is located on the side away from the waterproof membrane. The connecting sleeve is a soft sleeve and is sealed between the fixed seal and the movable seal.

[0011] Furthermore, the fixing seal includes a fixing plate and a suction cup. The fixing plate is a rigid annular plate, and the suction cup is annular. The suction cup is disposed on the side of the fixing plate facing the waterproof plate and can be adsorbed onto the waterproof plate. The top end of the connecting sleeve is sealed to the inner ring edge of the suction cup.

[0012] Furthermore, the sealing assembly also includes an auxiliary clamping member disposed on the fixed plate for pressing the suction cup against the waterproof plate.

[0013] Furthermore, the auxiliary clamping component includes a pressure plate, a connecting rod, a drive wheel, and a driven gear. The pressure plate is located between the suction cup and the fixed plate. The connecting rod is a threaded rod, and there are multiple connecting rods. The multiple connecting rods are circumferentially spaced and rotatably connected to the suction cup. The connecting rods pass sequentially through the pressure plate and the fixed plate, and are threadedly connected to the pressure plate and slidably connected to the fixed plate. The driven gear is rotatably mounted on the fixed plate, corresponding one-to-one with the connecting rod, and is threadedly connected to the corresponding connecting rod. The drive wheel is coaxially mounted and rotatably mounted on the fixed plate. The drive wheel is an internal gear disk, and the internal gear of the drive wheel meshes with the driven gear.

[0014] Furthermore, the movable seal includes a sealing sleeve and a locking ring. The sealing sleeve is coaxially connected to the lower end of the connecting sleeve, and the sealing sleeve is a rubber elastic sleeve. The diameter of the sealing sleeve is smaller than the diameter of the steel anchor rod. The locking ring can be fitted over the sealing sleeve and can seal and lock the sealing sleeve onto the steel anchor rod.

[0015] Furthermore, the inner ring of the locking ring has a cross-section comprising a frustum-shaped segment and a cylindrical segment connected vertically, wherein the diameter of the larger end of the cross-section is greater than the diameter of the reinforcing bar anchor rod, and the diameter of the smaller end of the cross-section is equal to the diameter of the reinforcing bar anchor rod. The cylindrical segment is connected to the smaller end of the frustum-shaped segment, and an internal thread is provided in the cylindrical segment. The exposed section of the reinforcing bar anchor rod is also provided with a thread, and the locking ring is threadedly connected to the exposed section of the reinforcing bar anchor rod through the internal thread.

[0016] Furthermore, the sealing assembly also includes multiple limiting rods, which are circumferentially spaced on the fixed plate and close to the edge of the fixed plate. When the locking ring is rotated, the locking ring can abut against the end of the limiting rod.

[0017] Furthermore, the fixing connector includes a binding strap, a pressure plate, and two first nuts. The exposed end of the steel anchor rod is arranged crosswise with the secondary lining steel reinforcement. The binding strap has threads at both ends, and the middle part of the binding strap is sleeved on the exposed end of the steel anchor rod. The two ends of the binding strap are located opposite each other on both sides of the exposed end of the steel anchor rod after passing around the secondary lining steel reinforcement. The pressure plate has through holes at both ends, and the pressure plate is sleeved on the two ends of the binding strap through the through holes. The two ends of the binding strap can be fixed in the two through holes respectively.

[0018] The binding strap is a steel wire strip with threads at both ends. Two first nuts are respectively fitted onto the two ends of the binding strap. Rotating the first nuts will push the pressure plate to press against the end of the steel anchor rod.

[0019] A method for stabilizing the waterproof secondary lining reinforcement of a tunnel arch, employing the aforementioned stabilizing device for the waterproof secondary lining reinforcement of a tunnel arch, comprising:

[0020] A waterproof membrane is installed along the surface of the concrete layer on the surrounding rock.

[0021] Anchoring holes are drilled from inside the waterproof membrane into the surrounding rock;

[0022] The steel anchor rod is anchored in the anchor hole;

[0023] A sealing assembly capable of axial elongation and radial deformation is installed between the steel anchor and the waterproof membrane, with the top of the sealing assembly fixed to the waterproof membrane and the lower end of the sealing assembly sealed to the steel anchor.

[0024] The steel anchor rods are fixedly connected to the secondary lining steel bars using fixed connectors.

[0025] The beneficial effects of this invention are:

[0026] The aforementioned device and method for stabilizing the secondary lining reinforcement of the tunnel arch waterproofing system includes the following: the stabilizing device comprises a waterproofing membrane tightly attached to a concrete layer of surrounding rock; reinforcing bar anchors sequentially passing through the waterproofing membrane and concrete layer, then inserted into the surrounding rock and anchored to both the surrounding rock and concrete layer by grout; a sealing component capable of axial elongation and radial deformation, which is sealed and fixed to the reinforcing bar anchors, with its top end able to seal and fix to the waterproofing membrane; and a fixing connector used to connect and fix the secondary lining reinforcement to the exposed ends of the reinforcing bar anchors. This stabilizing device is used in the stabilizing method.

[0027] When constructing the secondary lining reinforcement of ultra-large cross-section tunnels, after the initial support has been completed and the waterproof membrane has been installed in the concrete layer of the surrounding rock, anchor holes are first drilled from the waterproof membrane into the surrounding rock. Then, steel anchor rods are inserted into the anchor holes and grout is injected into the anchor holes to reinforce them.

[0028] Next, the sealing component is fitted and fixed on the exposed end of the steel anchor rod, and the top of the sealing component forms an end face seal with the waterproof membrane; finally, the exposed end of the steel anchor rod is connected to the secondary lining steel reinforcement through the fixing connector 400, which can stabilize the secondary lining steel reinforcement.

[0029] The waterproof secondary lining reinforcement stabilization device and method used in this tunnel arch not only strengthens the secondary lining reinforcement but also prevents groundwater from easily entering the secondary lining structure through the gaps created by the sealing component, thus reducing potential safety hazards to the engineering structure. Furthermore, because the sealing component can axially elongate and radially deform, when there is a slight relative displacement between the waterproof membrane and the reinforcement anchor, the top end of the sealing component remains fixed to the waterproof membrane, while the bottom end remains fixed to the reinforcement anchor. The sealing component compensates for the relative displacement between the waterproof membrane and the reinforcement anchor through expansion, contraction, or deformation, thus preventing leakage and further improving the sealing quality. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0031] Figure 1 This is a schematic diagram of a tunnel arch waterproof secondary lining reinforcement stabilization device installed inside a tunnel, according to an embodiment of the present invention.

[0032] Figure 2 for Figure 1 The diagram shows a schematic of a waterproof secondary lining reinforcement stabilization device for a tunnel arch.

[0033] Figure 3 for Figure 2 A further enlarged partial schematic diagram;

[0034] Figure 4 for Figure 1 The diagram shows a side view of a tunnel arch waterproof secondary lining reinforcement stabilization device where a fixing connector is fixed to a steel anchor rod and secondary lining reinforcement.

[0035] Figure label:

[0036] 1. Surrounding rock; 2. Concrete layer; 3. Secondary lining reinforcement;

[0037] 100. Waterproof membrane;

[0038] 200. Reinforcing bar anchors;

[0039] 300. Sealing assembly; 310. Fixed seal; 311. Fixed disc; 312. Suction cup; 320. Movable seal; 321. Sealing sleeve; 322. Locking ring; 330. Connecting sleeve; 340. Auxiliary clamping component; 341. Pressure plate; 342. Connecting rod; 343. Drive wheel; 344. Driven gear; 345. Limiting rod;

[0040] 400. Fixing connector; 410. Binding strap; 420. Pressure plate; 430. First nut;

[0041] 500. Stabilizer. Detailed Implementation

[0042] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0043] Please see Figures 1 to 4 The present invention provides a waterproof secondary lining reinforcement stabilization device for tunnel arch, including a waterproof plate 100, a steel anchor rod 200, a sealing component 300 and a fixing connector 400, for waterproofing tunnel arch and stabilizing secondary lining reinforcement 3.

[0044] Specifically, the waterproof membrane 100 is installed tightly against the concrete layer 2 of the surrounding rock 1. The reinforcing bar anchor 200 passes sequentially through the waterproof membrane 100 and the concrete layer 2, then inserts into the surrounding rock 1 and is anchored to both the surrounding rock 1 and the concrete layer 2 using grout. The sealing component 300 is capable of axial elongation and radial deformation. The sealing component 300 is fitted and fixed onto the reinforcing bar anchor 200, and its top end is sealed and fixed to the waterproof membrane 100. The fixing connector 400 is used to connect and fix the secondary lining reinforcing bars 3 to the exposed end of the reinforcing bar anchor 200.

[0045] When constructing the secondary lining reinforcement of an ultra-large cross-section tunnel, after the initial support has been completed and the waterproof membrane 100 has been installed in the concrete layer 2 of the surrounding rock 1, anchor holes are first drilled from the waterproof membrane 100 into the surrounding rock 1. Then, the steel anchor rods 200 are inserted into the anchor holes and grout is injected into the anchor holes to reinforce them.

[0046] Next, the sealing component 300 is fitted and fixed on the exposed end of the steel anchor rod 200, and the top of the sealing component 300 forms an end face seal with the waterproof membrane 100; finally, the exposed end of the steel anchor rod 200 is connected to the secondary lining steel bar 3 through the fixing connector 400, which can stabilize the secondary lining steel bar 3.

[0047] The use of this tunnel arch waterproof secondary lining reinforcement stabilization device not only strengthens the secondary lining reinforcement 3, but also, through the sealing of the sealing component 300, prevents groundwater from the surrounding rock 1 from easily entering the secondary lining structure through the gap, thereby reducing potential safety hazards to the engineering structure. Furthermore, because the sealing component 300 can axially elongate and radially deform, when there is a slight relative displacement between the waterproof membrane 100 and the reinforcement anchor 200, the top end of the sealing component 300 remains fixed to the waterproof membrane 100, while the bottom end remains fixed to the reinforcement anchor 200. The sealing component 300 compensates for the relative displacement between the waterproof membrane 100 and the reinforcement anchor 200 through expansion, contraction, or deformation, thus preventing leakage and further improving the sealing quality.

[0048] In this embodiment, the sealing assembly 300 includes a fixed seal 310, a movable seal 320, and a connecting sleeve 330. The fixed seal 310 is annular and is fitted onto the reinforcing bar anchor 200. The inner diameter of the fixed seal 310 is larger than the outer diameter of the reinforcing bar anchor 200, and it can be sealed to the surface of the waterproof membrane 100. The movable seal 320 is fixedly fitted onto the reinforcing bar anchor 200 and is located on the side away from the waterproof membrane 100. The connecting sleeve 330 is a soft sleeve and is sealed between the fixed seal 310 and the movable seal 320.

[0049] In use, the entire sealing assembly 300 is fitted onto the steel anchor rod 200, and the fixed sealing element 310 is fixedly connected to the waterproof membrane 100. The movable sealing element 320 is fixedly sealed on the steel anchor rod 200. When the waterproof membrane 100 and the steel anchor rod 200 undergo a slight relative displacement, the fixed sealing element 310 remains stationary, while the steel anchor rod 200 drives the movable sealing element 320 to move. The connecting sleeve 330 deforms as the steel anchor rod 200 moves, and the water seeping from the surrounding rock 1 is sealed and trapped between the connecting sleeve 330 and the steel anchor rod 200, thus preventing water from flowing into the secondary lining steel reinforcement.

[0050] Specifically, the fixing seal 310 includes a fixing plate 311 and a suction cup 312. The fixing plate 311 is a rigid annular plate, and the suction cup 312 is an annular suction cup 312. The suction cup 312 is located on the side of the fixing plate 311 facing the waterproof plate 100 and can be adsorbed onto the waterproof plate 100. The top of the connecting sleeve 330 is sealed to the inner ring edge of the suction cup 312.

[0051] In use, hold the fixing plate 311 and press it firmly towards the waterproof membrane 100. This will allow the suction cup 312 to adhere to the waterproof membrane 100, completing the installation and sealing of the fixing seal 310. This structure facilitates installation while providing a sealing effect.

[0052] In a preferred embodiment, the sealing assembly 300 further includes an auxiliary clamping member 340, which is disposed on the fixed plate 311 and is used to press the suction cup 312 against the waterproof plate 100. The clamping action of the auxiliary clamping member 340 further expels air between the suction cup 312 and the waterproof plate 100, thereby further improving the sealing effect and installation stability.

[0053] Specifically, the auxiliary clamping component 340 includes a pressure plate 341, a connecting rod 342, a drive wheel 343, and a driven gear 344. The pressure plate 341 is located between the suction cup 312 and the fixed plate 311. The connecting rod 342 is a threaded rod, and there are multiple connecting rods 342. The multiple connecting rods 342 are circumferentially spaced and rotatably connected to the suction cup 312. The connecting rods 342 sequentially pass through the pressure plate 341 and the fixed plate 311, and are threadedly connected to the pressure plate 341 and slidably connected to the fixed plate 311. The driven gear 344 is rotatably mounted on the fixed plate 311, corresponding one-to-one with the connecting rod 342, and is threadedly connected to the corresponding connecting rod 342. The drive wheel 343 is coaxially mounted on the fixed plate 311 and is an internal gear disk, and the internal gear of the drive wheel 343 meshes with the driven gear 344.

[0054] In practice, simply turn the drive wheel 343. The drive wheel 343 drives the driven gear 344 to rotate through the internal gear. Since the driven gear 344 is threadedly connected to the connecting rod 342, the connecting rod 342 can be driven to move vertically in the direction of the waterproof plate 100, thereby pushing the pressure plate 341 to press against the suction cup 312.

[0055] In this embodiment, the movable seal 320 includes a sealing sleeve 321 and a locking ring 322. The sealing sleeve 321 is coaxially connected to the lower end of the connecting sleeve 330, and the sealing sleeve 321 is a rubber elastic sleeve. The diameter of the sealing sleeve 321 is smaller than the diameter of the steel anchor rod 200. The locking ring 322 can be fitted over the sealing sleeve 321 and can seal and lock the sealing sleeve 321 onto the steel anchor rod 200.

[0056] During installation, the sealing sleeve 321 is fitted onto the reinforcing bar anchor rod 200 along with the fixing seal 310. After the fixing seal 310 is installed, the locking ring 322 is fitted onto the reinforcing bar anchor rod 200. The locking ring 322 locks and seals the sealing sleeve 321 onto the reinforcing bar anchor rod 200. Since the sealing sleeve 321 is a rubber elastic sleeve and its diameter is smaller than the diameter of the reinforcing bar anchor rod 200, when the locking ring 322 is fixed on the reinforcing bar anchor rod 200, the sealing sleeve 321 acts as a sealing gasket, thus achieving a seal.

[0057] Specifically, the inner ring of the locking ring 322 has a cross-section consisting of a frustum-shaped section and a cylindrical section connected vertically. The diameter of the larger end of the cross-section is larger than the diameter of the steel anchor rod 200, and the diameter of the smaller end of the cross-section is equal to the diameter of the steel anchor rod 200. The cylindrical section is connected to the smaller end of the frustum-shaped section. The cylindrical section is provided with internal threads, and the exposed section of the steel anchor rod 200 is provided with threads. The locking ring 322 is threadedly connected to the exposed section of the steel anchor rod 200 through the internal threads.

[0058] During installation, position the larger end of the frustoconical section close to the end of the waterproof membrane 100, and slip the locking ring 322 onto the bottom end of the steel anchor rod 200. Rotate the locking ring 322 until the upper end of the locking ring 322 is fitted over the sealing sleeve 321. Since the diameter of the smaller end of the frustoconical section is smaller than the diameter of the sealing sleeve 321, the sealing sleeve 321 can be pressed tightly against the steel anchor rod 200 to form a seal.

[0059] In a more preferred embodiment, the sealing assembly 300 further includes a limiting rod 345. There are multiple limiting rods 345, which are circumferentially spaced on the fixed plate 311 and close to the edge of the fixed plate 311. The locking ring 322 can be rotated to abut against the end of the limiting rod 345.

[0060] The limiting rod 345 prevents the locking ring 322 from moving too upwards, thus affecting its fixation of the sealing sleeve 321. In practice, ball bearings can be installed at the contact end between the limiting rod 345 and the locking ring 322 to reduce frictional resistance during mutual movement.

[0061] In this embodiment, the fixing connector 400 includes a binding strap 410, a pressure plate 420, and two first nuts 430. The exposed end of the steel anchor rod 200 is arranged crosswise with the secondary lining steel bar 3. The binding strap 410 has threads at both ends and is sleeved on the exposed end of the steel anchor rod 200 in the middle. The two ends of the binding strap 410 are located opposite each other on both sides of the exposed end of the steel anchor rod 200 after passing around the secondary lining steel bar 3. The pressure plate 420 has through holes at both ends and is sleeved on the two ends of the binding strap 410 through the through holes. The two ends of the binding strap 410 can be fixed in the two through holes respectively.

[0062] In this embodiment, the binding strap 410 is a steel wire strip with threads at both ends. Two first nuts 430 are respectively fitted onto the two ends of the binding strap 410. Rotating the first nuts 430 can push the pressure plate 420 to press against the end of the steel anchor rod 200.

[0063] During installation, first, the middle part of the binding strap 410 is placed over the exposed end of the steel anchor. Then, the two ends of the binding strap 410 are wrapped around the secondary lining steel 3 and positioned opposite each other on both sides of the exposed end of the steel anchor. Next, the two ends of the binding strap 410 are inserted into the two through holes. Then, the pressure plate 420 is pressed tightly onto the steel anchor 200. Finally, the two ends of the binding strap 410 are fixed in the two through holes. This allows the steel anchor 200 and the secondary lining steel 3 to be connected by binding. In this way, since the binding strap 410 is a strap, pulling the two ends of the binding strap 410 can easily bind the steel anchor 200 and the secondary lining steel 3 together.

[0064] This method allows for easy pressing of the pressure plate 420 onto the steel anchor rod 200. Alternatively, in other embodiments, the ends of the binding strap 410 can be fixed inside the perforation by anchoring or knotting.

[0065] As another preferred embodiment, the device may also include a stabilizing member 500, which is connected to the exposed end of the reinforcing bar anchor 200 and can be supported at the end of the sealing assembly 300 away from the waterproof membrane 100.

[0066] Specifically, the stabilizing component 500 is a tightening nut, and the threaded fitting of the tightening nut is located at the exposed end of the reinforcing bar anchor rod 200. Rotating the tightening nut allows it to abut against the sealing component 300. During installation, simply rotating the tightening nut will allow it to abut against the sealing component 300, thus fixing the position of the sealing component 300.

[0067] In practical implementation, the secondary lining reinforcement 3 can be selected as threaded steel bars. When the secondary lining reinforcement 3 is threaded steel bar, the friction between the secondary lining reinforcement 3 and the connecting strip and the exposed end of the steel bar anchor 200 can be increased, thereby improving the stability of the fixed connection.

[0068] In addition, the steel anchor rod 200 can be made directly from threaded steel bars. Inserting threads into the steel anchor rod 200 can increase the anchoring effect between the steel anchor rod 200 and the rock, and at the same time facilitate the sourcing of materials.

[0069] Furthermore, the present invention also provides a method for stabilizing the waterproof secondary lining reinforcement of a tunnel arch, which employs the aforementioned stabilizing device for the waterproof secondary lining reinforcement of the tunnel arch as described in the above claims, comprising:

[0070] A waterproof membrane is installed along the surface of the concrete layer on the surrounding rock.

[0071] Anchoring holes are drilled from inside the waterproof membrane into the surrounding rock.

[0072] The steel anchor rod is anchored in the anchor hole;

[0073] A sealing assembly capable of axial elongation and radial deformation is installed between the steel anchor and the waterproof membrane, with the top of the sealing assembly fixed to the waterproof membrane and the lower end of the sealing assembly sealed to the steel anchor.

[0074] The steel anchor rods are fixedly connected to the secondary lining steel bars using fixed connectors.

[0075] The specific installation process using the above-mentioned device and method is as follows:

[0076] When constructing the secondary lining reinforcement 3 of the ultra-large cross-section tunnel, after the initial support has been completed and the waterproof membrane 100 has been installed in the concrete layer 2 of the surrounding rock 1, firstly, anchor holes are drilled from the outside of the waterproof membrane 100 into the surrounding rock 1, then the steel anchor rod 200 is inserted into the anchor hole, and grout is injected into the anchor hole to play the role of anchor rod reinforcement.

[0077] Next, the sealing assembly 300 is fitted onto the exposed end of the steel anchor rod 200 until the suction cup 312 is pressed against the end face of the waterproof membrane 100. Then, the drive wheel 343 is rotated to drive the pressure plate 341 to press against the suction cup 312. Next, the locking ring 322 is fitted onto the steel anchor rod 200. Then, the locking ring 322 is rotated until it abuts against the limiting rod 345, thus completing the installation of the sealing assembly 300.

[0078] Next, the exposed end of the steel anchor rod 200 is tied to the secondary lining steel bar 3 with steel wire. Then, the pressure plate 420 is sleeved on both ends of the steel wire. Finally, the two first nuts 430 are rotated to press the pressure plate 420 onto the steel anchor rod 200, thus completing the installation of the entire device.

[0079] The above-mentioned device and method can not only stabilize the large-volume steel reinforcement of the secondary lining of the tunnel arch, but also take into account the functions of anchor bolts and secondary lining waterproofing. It can also achieve good waterproofing even when there is relative displacement between the steel anchor bolt 200 and the waterproofing board 100, thereby greatly improving the safety of the engineering structure.

[0080] The present invention also provides a method for stabilizing the waterproof secondary lining reinforcement of a tunnel arch, which uses the above-mentioned device and includes the following steps:

[0081] S110. A waterproof membrane 100 is installed along the surface of the concrete layer 2 on the surrounding rock 1.

[0082] Specifically, the waterproof membrane 100 should be firmly fixed to the concrete layer 2.

[0083] S120. Anchor holes are made from inside the waterproof membrane 100 into the surrounding rock 1.

[0084] Specifically, the size of the anchor hole should be compatible with the outer diameter of the steel anchor rod (200mm).

[0085] S130. Anchor the steel anchor rod 200 in the anchor hole;

[0086] Specifically, the steel anchor rod 200 is anchored in the anchor hole using concrete;

[0087] S140. A sealing component 300 capable of axial elongation and radial deformation is provided between the steel anchor rod 200 and the waterproof membrane 100, and the top of the sealing component 300 is fixed to the waterproof membrane, and the lower end of the sealing component 300 is sealed to the steel anchor rod 200.

[0088] S150, the steel anchor rod 200 is fixedly connected to the secondary lining steel bar 3 by the fixed connector 400.

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for stabilizing the reinforcing steel reinforcement of a waterproof secondary lining in a tunnel arch, characterized in that, include: A waterproof membrane, wherein the waterproof membrane is installed in close contact with the concrete layer of the surrounding rock; The steel anchor rod passes through the waterproof membrane and the concrete layer in sequence, is inserted into the surrounding rock, and is anchored to the surrounding rock and the concrete layer by anchor grout; A sealing assembly, capable of axial elongation and radial deformation, is sealed and fixed to the reinforcing bar anchor, and its top end is sealed and fixed to the waterproof membrane; and Fixed connectors are used to connect and fix the secondary lining steel bars to the exposed ends of the steel bar anchor rods; The sealing assembly includes a fixed seal, a movable seal, and a connecting sleeve. The fixed seal is annular and is fitted onto the reinforcing bar anchor. The inner diameter of the fixed seal is larger than the outer diameter of the reinforcing bar anchor and can be sealed to the surface of the waterproof membrane. The movable seal is fixedly fitted onto the reinforcing bar anchor and is located on the side away from the waterproof membrane. The connecting sleeve is a soft sleeve and is sealed between the fixed seal and the movable seal. The fixing sealing component includes a fixing plate and a suction cup. The fixing plate is a rigid annular plate, and the suction cup is annular. The suction cup is located on the side of the fixing plate facing the waterproof plate and can be adsorbed onto the waterproof plate. The top end of the connecting sleeve is sealed to the inner ring edge of the suction cup. The movable sealing element includes a sealing sleeve and a locking ring. The sealing sleeve is coaxially connected to the lower end of the connecting sleeve, and the sealing sleeve is a rubber elastic sleeve. The diameter of the sealing sleeve is smaller than the diameter of the steel anchor rod. The locking ring can be sleeved on the outside of the sealing sleeve and can seal and lock the sealing sleeve onto the steel anchor rod.

2. The tunnel arch waterproof secondary lining reinforcement stabilization device according to claim 1, characterized in that, The sealing assembly also includes an auxiliary clamping component, which is disposed on the fixed plate and is used to press the suction cup against the waterproof plate.

3. The tunnel arch waterproof secondary lining reinforcement stabilization device according to claim 2, characterized in that, The auxiliary clamping component includes a pressure plate, connecting rods, a drive wheel, and a driven gear. The pressure plate is located between the suction cup and the fixed plate. The connecting rods are threaded rods, and there are multiple connecting rods. The multiple connecting rods are circumferentially spaced and rotatably connected to the suction cup. The connecting rods pass sequentially through the pressure plate and the fixed plate, and are threadedly connected to the pressure plate and slidably connected to the fixed plate. The driven gear is rotatably mounted on the fixed plate, corresponding one-to-one with the connecting rod, and is threadedly connected to the corresponding connecting rod. The drive wheel is coaxially mounted and rotatably mounted on the fixed plate. The drive wheel is an internal gear disk, and the internal gear of the drive wheel meshes with the driven gear.

4. The tunnel arch waterproof secondary lining reinforcement stabilization device according to claim 1, characterized in that, The inner ring of the locking ring has a cross-section comprising a frustum-shaped section and a cylindrical section connected vertically. The diameter of the larger end of the cross-section is larger than the diameter of the steel anchor rod, and the diameter of the smaller end of the cross-section is equal to the diameter of the steel anchor rod. The cylindrical section is connected to the smaller end of the frustum-shaped section. The cylindrical section is provided with an internal thread, and the exposed section of the steel anchor rod is provided with a thread. The locking ring is threadedly connected to the exposed section of the steel anchor rod through the internal thread.

5. The tunnel arch waterproof secondary lining reinforcement stabilization device according to claim 1, characterized in that, The sealing assembly also includes multiple limiting rods, which are circumferentially spaced on the fixed plate and close to the edge of the fixed plate. When the locking ring is rotated, the locking ring can abut against the end of the limiting rod.

6. The tunnel arch waterproof secondary lining reinforcement stabilization device according to claim 1, characterized in that, The fixing connector includes a binding strap, a pressure plate, and two first nuts. The exposed end of the steel anchor rod is arranged crosswise with the secondary lining steel reinforcement. The binding strap has threads at both ends, and the middle part of the binding strap is sleeved on the exposed end of the steel anchor rod. The two ends of the binding strap are located opposite each other on both sides of the exposed end of the steel anchor rod after passing around the secondary lining steel reinforcement. The pressure plate has through holes at both ends, and the pressure plate is sleeved on the two ends of the binding strap through the through holes. The two ends of the binding strap can be fixed in the two through holes respectively. The binding strap is a steel wire strip with threads at both ends. Two first nuts are respectively fitted onto the two ends of the binding strap. Rotating the first nuts will push the pressure plate to press against the end of the steel anchor rod.

7. A method for stabilizing the reinforcing steel of a waterproof secondary lining in a tunnel arch, characterized in that, The tunnel arch waterproof secondary lining reinforcement stabilization device according to any one of claims 1-6 comprises: A waterproof membrane is installed along the surface of the concrete layer on the surrounding rock. Anchoring holes are drilled from inside the waterproof membrane into the surrounding rock; The steel anchor rod is anchored in the anchor hole; A sealing assembly capable of axial elongation and radial deformation is installed between the steel anchor and the waterproof membrane, with the top of the sealing assembly fixed to the waterproof membrane and the lower end of the sealing assembly sealed to the steel anchor. The steel anchor rods are fixedly connected to the secondary lining steel bars using fixed connectors.

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