Joint structure of pipe-jacking tunnel in ground fissure site

Abstract

The utility model relates to the technical field of tunnel engineering, and discloses a ground fissure site pipe-jacking tunnel joint structure which comprises a first pipe joint, a second pipe joint, a lining, a limiting device and a first water stop belt. The inner side of the joint of the first pipe joint is elastically connected with the inner side of the lining through a limiting device; the outer side of the lining is detachably connected with the inner side of the joint of the second pipe joint; the first waterstop is arranged between the edge of the inner side of the first pipe joint connector and the edge of the inner side of the lining, and the first waterstop is in an omega shape. According to the joint structure of the pipe-jacking tunnel in the ground fissure site, a plurality of layers of waterproof structures such as a water swelling rubber pad, a hollow elastic water stop belt, an omega water stop belt and a grouting hole are adopted, so that the waterproof performance is ensured when a pipe joint joint deforms; by designing a plurality of waterproof flexible structures and sliding dismounting mechanisms, reliable connection and effective water prevention of the joint are realized; meanwhile, the structure further has the advantages of being easy to install, disassemble and maintain and the like, and construction efficiency and convenience can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel engineering technical field, especially relate to a ground fissure site pipe jacking tunnel joint structure. BACKGROUND

[0002] In recent years, with the rapid advancement of urbanization, in the case of urban land resources increasingly nervous, in order to have the promotion urban infrastructure construction quality, many cities are seeking development space underground, and promote the construction of urban underground pipe network, power grid tunnel etc. Among them, using pipe jacking technology to excavate tunnel, not only can shorten the construction period, improve construction safety, and the influence on the surrounding environment is small, does not affect the normal life and environment of city, so the method is mainly used for the construction of urban pipe network, power grid etc. Underground tunnel.

[0003] It is known that the biggest problem of urban underground structure construction lies in the difference and complexity of geological conditions, and the protection of urban underground tunnel in ground fissure site is a big problem. Because ground fissure activity can cause soil settlement deformation, cause deformation and damage of tunnel structure in a certain range and threaten the safety and stability of structure. In order to make the tunnel adapt to the deformation caused by ground fissure, the conventional idea at present is to segment the tunnel structure and use flexible connection. However, tunnel segmentation makes the structure face deformation and waterproof pressure, and the existing solutions are all for shield tunnel or mine method tunnel, and for the pipe jacking tunnel with different structure forms, the existing scheme cannot be directly copied, how to make the structure ensure waterproof effect when deforming is a big problem. Therefore, it is necessary to provide a ground fissure site pipe jacking tunnel joint structure with strong controllability, good waterproof effect and maintainability to solve the above technical problems. UTILITY MODEL CONTENTS

[0004] In order to solve the existing problems, the utility model provides a ground fissure site pipe jacking tunnel joint structure, which realizes reliable connection and effective waterproof of the joint by designing multiple waterproof flexible structures and sliding dismounting mechanism. At the same time, the structure also has the advantages of easy installation, dismounting and maintenance, which can improve construction efficiency and convenience.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme.

[0006] A ground fissure site pipe jacking tunnel joint structure, comprising a first pipe joint, a second pipe joint, a lining, a limiting device, a first water stop, the inner side of the joint of the first pipe joint is elastically connected with the inner side of the lining through the limiting device, the outer side of the lining is detachably connected with the inner side of the joint of the second pipe joint, the first water stop is arranged between the inner side edge of the joint of the first pipe joint and the inner side edge of the lining, and the first water stop is in the shape of omega.

[0007] As a further improvement of the present invention, it also includes a second water stop provided between the end faces of the first pipe joint and the second pipe joint.

[0008] As a further improvement of the present invention, the second waterstop is a hollow elastic waterstop.

[0009] As a further improvement of the present invention, it further comprises a steel collar; the joint of the first pipe section and the joint of the second pipe section extend into the inner cavity of the steel collar for connection.

[0010] As a further improvement of the present invention, a water-swellable rubber pad is provided between the outer side of the joint of the second pipe section and the inner side of the steel collar.

[0011] As a further improvement of the present invention, it also includes a rubber water stop ring arranged between the outer side of the lining and the inner side of the joint of the second pipe section.

[0012] As a further improvement of the present invention, both the first pipe joint and the second pipe joint are provided with oblique grouting holes, and the two oblique grouting holes are arranged opposite to each other.

[0013] As a further improvement of the present invention, the limiting device includes a closed box and two groups of push-pull rods, springs and spring baffles symmetrically arranged inside the closed box; the inner wall of the closed box and the spring baffle are connected by a spring; the push-pull rods are connected to the spring baffle at one end and a connecting joint is provided at the other end.

[0014] As a further improvement of the present invention, it further comprises two groups of supports; the connecting joints of the two groups of push-pull rods are respectively connected to the first pipe section and the second pipe section through one group of supports.

[0015] As a further improvement of the present invention, the support includes a first baffle, a screw hole, a fastening nail, a second baffle and a bolt plate; the fastening nail is used to connect the support to the first pipe section or the second pipe section; the second baffle is vertically arranged on one side of the first baffle; the bolt plate is arranged on the second baffle for connecting to the connecting joint.

[0016] The utility model has the following beneficial effects:

[0017] The utility model can effectively connect the first pipe section and the second pipe section, while providing additional flexible support and stability through the lining and the limit device. The first water stop ensures waterproof performance between the two pipe sections and is suitable for the special environment of the ground fissure site.

[0018] Preferably, adding a second waterstop, especially a hollow elastic waterstop, can further improve the waterproof performance, enhance the sealing of the joint structure, and reduce the risk of moisture penetration.

[0019] Preferably, the use of steel collars increases the connection strength between pipe segments, improving the stability and durability of the entire structure, especially when subjected to external pressure or crustal movement.

[0020] Preferably, the rubber pad can swell when it comes into contact with water, thereby providing a better sealing effect and preventing moisture from penetrating through the gap between the second pipe section and the steel collar.

[0021] Preferably, the provision of a rubber water stop further enhances the waterproof performance between the lining and the second pipe section, ensuring the sealing of the entire joint structure.

[0022] Preferably, the Ω-shaped waterstop has better elasticity and adaptability, and can better adapt to small displacements between pipe sections while maintaining waterproof performance.

[0023] Preferably, the limiting device can absorb and disperse the displacement and stress between the pipe segments, protecting the joint structure from damage while maintaining its stability and functionality.

[0024] Optionally, the support provides a stable connection point between the stop device and the pipe section, ensuring that the stop device can function correctly while enhancing the stability of the entire structure.

[0025] Optionally, this support structure makes installation and removal more convenient, while providing sufficient strength and stability to support the stopper and pipe joint. The bolt plate design makes the connection more secure and not easy to loosen.

[0026] Optionally, the design of the bolt hole and the latch makes the connection between the support and the limit device more flexible and reliable, and can be adjusted as needed while ensuring the stability and safety of the connection point. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are merely schematic and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0028] Figure 1 A schematic diagram of a pipe-jacking tunnel joint structure in a ground fissure site according to an embodiment;

[0029] Figure 2 A schematic diagram of a limiting device for a pipe-jacking tunnel joint structure in a ground fissure site according to an embodiment;

[0030] Figure 3 A schematic diagram of a support for a pipe-jacking tunnel joint structure in a ground fissure site according to an embodiment;

[0031] Figure 4 A bolt of a pipe jacking tunnel joint structure in a ground fissure site for an embodiment is shown in the figure;

[0032] Figure 5 A bolt of a pipe jacking tunnel joint structure in a ground fissure site for an embodiment is shown in the figure;

[0033] Figure 6 A bolt plate of a pipe jacking tunnel joint structure in a ground fissure site for an embodiment is shown in the figure;

[0034] Wherein, 1, first pipe section; 2, second pipe section; 3, grouting hole; 4, steel ring; 5, water-swelling rubber pad; 6, second water stop; 7, lining; 8, rubber water stop ring; 9, first water stop; 10, limiting device; 11, support; 12, bolt; 101, push-pull rod; 102, spring; 103, spring baffle; 104, closure box; 105, connecting joint; 111, first baffle; 112, fastening nail; 113, second baffle; 114, bolt plate; 121, nut; 122, screw rod; 131, screw; 132, nut. DETAILED DESCRIPTION

[0035] In order to make the technical personnel in the art better understand the technical solutions in the present application, 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. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0036] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for purposes of illustration and description only and are not intended to be limiting.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the terms "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] EMBODIMENTS

[0039] In this embodiment, the side close to the surrounding rock and soil surface is the outer side or outer surface, the side close to the inside of the tunnel is the inner side or inner surface, the extension direction of the tunnel is the axial direction of the tunnel, the first pipe section 1 is the previous tunnel section, and the second pipe section 2 is the next tunnel section.

[0040] like Figure 1 The top pipe tunnel joint structure shown in the figure comprises a first pipe segment 1, a second pipe segment 2, a lining 7, a limiting device 10 and a first water stop 9.

[0041] The first water stop 9 is arranged between the inner edge of the joint of the first pipe section 1 and the inner edge of the lining 7 to form a waterproof structure. The first water stop 9 is in the shape of an Ω.

[0042] The inner side of the joint of the first pipe section 1 is elastically connected to the inner side of the lining 7 through a limiting device 10. The lining 7 can withstand the surrounding rock, internal water pressure and other loads, and helps to prevent the deformation and collapse of the surrounding rock. The lining 7 is arranged on the inner side of the joint of the second pipe section 2 and is in the shape of a right-angled trapezoid. The lining 7 is made of ductile concrete and is fixed to the inner side of the second pipe section 2 with bolts. The lining 7 is detachable. When the internal water-stop structure needs to be maintained, the lining 7 can be disassembled to inspect, repair or replace the internal waterproof components. The gap between the lining 7 and the inner side of the second pipe section 2 is filled with a rubber water-stop ring 8 to prevent moisture from seeping in from the gap between the lining 7 and the pipe section, forming another waterproof structure.

[0043] A second waterstop 6 is installed between the joints of the first pipe section 1 and the second pipe section 2, enhancing the waterproofing of the joint and preventing water from penetrating through the joint. This second waterstop 6 is a hollow elastic waterstop. The Ω waterstop has excellent elasticity and strength, maintaining its waterproofing effect even when significant relative deformation occurs between the first and second pipe sections 1 and 2, forming an additional waterproofing layer.

[0044] like Figure 1 As shown, the outer side of the joint of the first pipe section 1 is equipped with a smooth steel collar 4 made of low-carbon Q355B steel, with a thickness of 10 mm. The joint of the second pipe section 2 is precisely machined according to design requirements to ensure a perfect match with the steel collar 4 and ensure proper welding of the steel collar 4 to the second joint. Two water-swellable rubber pads 5 are installed on the outer side of the joint of the second pipe section 2. When moisture intrudes from outside, these rubber pads expand to fill the gap between the inner side of the steel collar 4 and the outer side of the second pipe section 2, forming another waterproof structure.

[0045] like Figure 1As shown, both the first and second pipe segments 1 and 2 are equipped with oblique grouting holes 3. The grouting outlets are positioned opposite each other, facing the ground fissures, allowing grouting into the fractured rock mass outside the tunnel. Grouting not only reinforces the fractured surrounding rock near the ground fissures to mitigate structural deformation, but also provides a seal and waterproofing effect by encapsulating the lining 7 with grout, forming another waterproof layer.

[0046] In order to limit the horizontal deformation between the first pipe section 1 and the second pipe section 2 caused by the activity of the ground fissure, a plurality of axial displacement limiting devices 10 are provided on the inner sides of the first pipe section 1 and the second pipe section 2. Figure 2 As shown, the limiting device 10 comprises a closed box 104 and two symmetrically arranged sets of push-pull rods 101, a spring 102, and a spring baffle 103 within it. The inner wall of the closed box 104 is connected to the spring baffle 103 via the spring 102. Each push-pull rod 101 is connected to the spring baffle 103 at one end, and a connecting joint 105 is provided at the other end. One end of the limiting device 10 is fixed to the first pipe section 1 via a support 11 and a latch 12, and the other end is fixed to the inside of the removable lining 7 in the second pipe section 2 via a support 11 and a latch 12. This provides a buffer and limiting effect when the joint disengages due to axial deformation in the tunnel, ensuring the stability and waterproof performance of the pipe section joint to a certain extent.

[0047] The structure of the support is as follows Figure 3 As shown. The support 11 includes a first baffle 111, screw holes, fastening nails 112, a second baffle 113 and a bolt plate 114; the fastening nails 112 are used to connect the support 11 to the first pipe section 1 or the second pipe section 2; the second baffle 113 is vertically arranged on one side of the first baffle 111; the bolt plate 114 is arranged on the second baffle 113 and is used to connect to the connecting joint 105. The enlarged view of the bolt plate 114 is shown in FIG. Figure 6 shown.

[0048] The latch 12 includes a nut 121 and a screw 122, which are used to connect the joint 105 and the limiting device 10. Figure 4 shown.

[0049] The first baffle 111 and the second baffle 113 are fixed by screws 131 and nuts 132. Figure 5 shown.

[0050] In summary, in this example, a high-strength, smooth steel collar 4 is installed on the outside of the first pipe section 1 to ensure a tight fit at the joint with the second pipe section 2. Two layers of water-swellable rubber pads 5 are installed on the outside of the joint of the second pipe section 2, which expand and fill the gap when exposed to water. A highly elastic, wear-resistant, hollow elastic waterstop is installed between the first and second pipe sections 1 and 2 to accommodate relative deformation between the pipe sections and provide waterproofing. A removable lining 7 made of high-ductility concrete is installed on the inside of the second pipe section 2 to facilitate subsequent maintenance. A rubber waterstop 8 made of aging-resistant, highly elastic rubber material is installed between the removable lining 7 and the second pipe section 2 to prevent water intrusion through the gap. An Ω waterstop is used to connect the first and second pipe sections 1 and 2, ensuring a good waterproofing effect even when the tunnel joint deforms. Furthermore, a displacement limiting device is installed between the first and second pipe sections 1 and 2 to ensure a flexible connection of the pipelines, maintain stability during axial displacement, and limit relative deformation of the pipe joint, providing waterproofing.

[0051] The pipe jacking tunnel joint structure in a ground fissure site described in this embodiment further includes the following construction steps:

[0052] Step 1: Check the quality of all materials to ensure they meet the design requirements. Accurately measure and process the joints of the first pipe section 1 and the second pipe section 2 to ensure they match.

[0053] Step 2: Install the steel collar 4 and fix the steel collar 4 at the joint of the first pipe section 1 to ensure that it is firmly installed and accurately positioned.

[0054] Step 3: Install the water-swelling rubber pad 5. Install two layers of water-swelling rubber pads 5 on both sides of the joint of the second pipe section 2, ensuring that the pads are flat and undamaged.

[0055] Step 4: Connect the pipe section with the first waterstop 9 and the second waterstop 6. Connect the first pipe section 1 and the second pipe section 2 with the steel collar 4 to ensure a tight connection. Install the hollow second waterstop 6 in the gap between the pipe sections to ensure that the waterstop can slide and adapt to the displacement of the pipe sections.

[0056] Step 5: Install the removable lining 7 and waterstop components. Install the removable lining 7 below the second pipe segment 2, ensuring it is positioned correctly and securely installed. Install the rubber waterstop 8 between the removable lining 7 and the second pipe segment 2, ensuring it is secure and intact. Install the Ω waterstop between the removable lining 7 and the first pipe segment 1, ensuring it is flat.

[0057] Step 6: Install the displacement limiting device between the first pipe section 1 and the removable lining 7 to ensure that the device can work normally and provide sufficient buffering and limiting effects.

[0058] Step 7: Check the integrity of the waterproof structure regularly and repair or replace it if damaged. If the water-stop element needs to be repaired or replaced, remove the lining 7 for operation.

[0059] The utility model discloses a pipe-jacking tunnel joint structure for ground fissure sites. This structure achieves reliable connection and effective waterproofing of the joint through a rationally designed sliding disassembly mechanism and waterproof structure. At the same time, the structure also has the advantages of being easy to install, disassemble, and adjust, greatly improving construction efficiency and maintenance convenience. Through the above-mentioned construction steps and the provision of a waterproof structure, the utility model's sliding and removable pipe-jacking joint connection and waterproof structure can meet the waterproofing requirements under conditions of large deformation and facilitate subsequent maintenance.

[0060] The above embodiment is only one of the implementation methods that can realize the technical solution of the present utility model. The scope of protection claimed by the present utility model is not limited only to the embodiment, but also includes any changes, replacements and other implementation methods that can be easily thought of by any person skilled in the art within the technical scope disclosed by the present utility model. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pipe-jacking tunnel joint structure for a ground fissure site, characterized in that: The invention comprises a first pipe section (1), a second pipe section (2), a lining (7), a limiting device (10), and a first water stop (9); the inner side of the joint of the first pipe section (1) is elastically connected to the inner side of the lining (7) via the limiting device (10); the outer side of the lining (7) is detachably connected to the inner side of the joint of the second pipe section (2); the first water stop (9) is arranged between the inner edge of the joint of the first pipe section (1) and the inner edge of the lining (7), and the first water stop (9) is in the shape of an Ω.

2. A ground fissure site top pipe tunnel joint structure according to claim 1, characterized in that: It also includes a second water stop (6) arranged between the joint of the first pipe section (1) and the end surface of the joint of the second pipe section (2).

3. A ground fissure site jacking tunnel joint structure according to claim 2, characterized in that: The second waterstop (6) is a hollow elastic waterstop.

4. The pipe-jacking tunnel joint structure for ground fissures according to claim 1, characterized in that: It also includes a steel collar (4); the joint of the first pipe section (1) and the joint of the second pipe section (2) extend into the inner cavity of the steel collar (4) for connection.

5. A pipe-jacking tunnel joint structure for ground fissures according to claim 4, characterized in that: A water-swellable rubber pad (5) is provided between the outer side of the joint of the second pipe section (2) and the inner side of the steel collar (4).

6. The pipe-jacking tunnel joint structure for ground fissures according to claim 1, characterized in that: It also includes a rubber water stop ring (8) arranged between the outer side of the lining (7) and the inner side of the joint of the second pipe section (2).

7. The pipe-jacking tunnel joint structure for ground fissures according to claim 1, characterized in that: The first pipe section (1) joint and the second pipe section (2) joint are both provided with oblique grouting holes (3), and the two oblique grouting holes (3) are arranged opposite to each other.

8. The pipe-jacking tunnel joint structure for ground fissures according to claim 1, characterized in that: The limiting device (10) includes a closed box (104) and two sets of push-pull rods (101), springs (102) and spring baffles (103) symmetrically arranged inside the closed box; the inner wall of the closed box (104) and the spring baffles (103) are connected via the springs (102); the push-pull rods (101) are connected to the spring baffles (103) at one end, and a connecting joint (105) is provided at the other end.

9. A pipe-jacking tunnel joint structure for ground fissures according to claim 8, characterized in that: It also includes two groups of supports (11); the two groups of connecting joints (105) are respectively connected to the first pipe section (1) and the second pipe section (2) through the supports (11).

10. A pipe-jacking tunnel joint structure for ground fissures according to claim 9, characterized in that: The support (11) comprises a first baffle (111), a screw hole, a fastening nail (112), a second baffle (113) and a bolt plate (114); the fastening nail (112) is used to connect the support (11) to the first pipe section (1) or the second pipe section (2); the second baffle (113) is vertically arranged on one side of the first baffle (111); the bolt plate (114) is arranged on the second baffle (113) and is used to connect to the connecting joint (105).

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