Cross-fault urban comprehensive pipe gallery anti-fault breakage yielding protection structure and construction method

Abstract

The present application relates to a kind of across fault city comprehensive pipe gallery anti-fault let pressure protection structure and construction method, belong to city infrastructure protection technical field.The across fault city comprehensive pipe gallery anti-fault let pressure protection structure, comprising: multiple distribution in pipe gallery both sides and bottom water bag, set on foundation stainless steel mesh belt chain and multiple set on stainless steel mesh belt chain stainless steel rectangular spring, bottom water bag is set between pipe gallery and stainless steel mesh belt chain, the top of bottom water bag and pipe gallery between is provided with PVC waterproof cloth, the stainless steel mesh belt chain is placed with multiple isolation shell in bottom water bag;Adapt to fault dislocation, improve the anti-deformation ability of pipe gallery;Using the combination design of water bag, foamed solidified soil, automatic pressure control water valve, can absorb and disperse stress when fault occurs dislocation, adjust pressure locally by water valve, reduce the direct impact on pipe gallery main structure, reduce the risk of pipe gallery wall cracking or damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of urban infrastructure protection, in particular to a cross-fault urban comprehensive pipe gallery anti-misalignment yielding and pressure protection structure and construction method. BACKGROUND

[0002] The urban comprehensive pipe gallery is an important part of modern urban underground infrastructure, which can centrally accommodate municipal pipelines such as power, communication, water supply, drainage, and gas, reduce ground excavation, and optimize urban space utilization. However, in areas with complex geological conditions and frequent fault activities, the structural stability and safety of the comprehensive pipe gallery are greatly challenged. Therefore, the protection measures of the urban comprehensive pipe gallery are crucial.

[0003] Chinese patent CN114592539A discloses a rectangular pipe gallery with a deformation cavity, which is provided from top to bottom with a top part of a pressure relief gallery roof, a deformation cavity, an elastic block, an elastic support assembly, an elastic buffer layer, and a load-bearing partition wall. The arc-shaped top part of the pressure relief gallery roof unloads most of the pressure of the soil above the pipe gallery body to the opposite sides of the pipe gallery body. Then, the elastic deformation of the deformation cavity, the elastic block, the elastic support assembly, and the elastic buffer layer absorbs part of the pressure of the soil above the pipe gallery body. Finally, the load-bearing partition wall quickly transmits the remaining pressure of the soil above the pipe gallery body to the bottom of the pipe gallery body. However, it can only realize single-direction deformation pressure relief, cannot cope with multi-directional extrusion pressure changes, and lacks automatic adjustment devices, mainly relying on the performance of the material itself.

[0004] Chinese patent CN106285724A discloses a tunnel yielding support system, in which the shoulder and waist of each steel arch are provided with a collapsible unit. The collapsible unit is composed of a collapsible component and a rectangular rubber shock absorber. The deformation grooves are reserved between the collapsible components, and the rectangular rubber shock absorber is arranged in the deformation grooves. The rectangular rubber shock absorber and the sprayed concrete layer are provided with a partition plate therebetween, and a plurality of yielding anchor rods are arranged on the sprayed concrete layer at a certain interval. However, it is mainly suitable for soft surrounding rock. In the fault area, the deformation of the surrounding rock may be very complex, and sudden misalignment may exist. The mechanical structure responds slowly and may not be able to respond to the rapid deformation caused by fault misalignment in time.

[0005] A multi-stage pressure relief supporting structure applied to underground engineering is disclosed in Chinese invention patent CN116556987A, which comprises a U-shaped steel arch, a pressure relief device A, a pressure relief device B, a rigid supporting structure, a pressure relief anchor, and a foam concrete layer. The outer ring supporting structure is formed by connecting multiple U-shaped steel arches with the pressure relief device A. The pressure relief anchor is fixed in the surrounding rock, and a foam concrete layer is sprayed around the pressure relief anchor. The outer ring steel arch is connected with the foam concrete layer. The pressure relief device B is welded to the inner side of the U-shaped steel arch in the outer ring supporting structure. The rigid supporting structure is composed of multiple U-shaped steel arches connected together. The U-shaped steel arch has a connecting plate welded at the end. The adjacent two U-shaped steel arches are fixed by bolt connection. However, the main reliance is on the compression performance of the foam concrete layer, and the deformation ability of the U-shaped steel arch and the pressure relief device when acting together to achieve buffering. It is biased towards static and cannot adjust the pressure in real time like a water bag. The adaptability to sudden geological changes is weak. Although the construction is relatively simple, once the multi-stage pressure relief supporting structure of the patent appears local damage, it is difficult to repair and may need to remove part of the structure. SUMMARY

[0006] Therefore, it is necessary to provide a cross-fault urban comprehensive pipe gallery anti-fault rupture pressure relief protection structure and construction method to solve the problems of poor buffering and anti-fault ability, inconvenient maintenance and repair, and inability to ensure long-term stable operation.

[0007] A cross-fault urban comprehensive pipe gallery anti-fault rupture pressure relief protection structure comprises:

[0008] A plurality of water bags distributed on both sides and the bottom of the pipe gallery, a stainless steel mesh belt chain arranged on the foundation, and a plurality of stainless steel rectangular springs arranged on the stainless steel mesh belt chain. The water bag at the bottom is arranged between the pipe gallery and the stainless steel mesh belt chain. A PVC waterproof cloth is arranged between the top end of the water bag at the bottom and the pipe gallery. The stainless steel mesh belt chain is provided with a plurality of isolation shells arranged in the water bag at the bottom. A plurality of stainless steel rectangular springs are arranged in the corresponding isolation shells.

[0009] An automatic pressure control water valve, a plurality of water bags are connected to each other, and a plurality of automatic pressure control water valves are arranged at the connection of the water bags.

[0010] Low-strength foamed solidified soil is poured into the gap of the plurality of water bags to seal the water bags and the external area of the pipe gallery. The low-strength foamed solidified soil forms a support layer after solidification.

[0011] In one embodiment, the automatic pressure control water valve comprises a T-shaped pipe body, a spring, and a rubber plug. One end of the spring is fixedly connected with the inner wall of the T-shaped pipe body, and the other end of the spring is fixedly connected with the rubber plug.

[0012] In one embodiment, the ratio of the low-strength foamed solidified soil is as follows:

[0013] The mixing ratios of raw soil, curing agent, foaming agent, water reducing agent, anti-softening agent, and water are 50%-60%, 15%-20%, 3%-5%, 0.3%-0.8%, 1%-2%, and 25-35% respectively.

[0014] In one embodiment, the water bag is filled with a freezing liquid, and the material of the water bag is a rubber material component.

[0015] In one embodiment, the specifications of the side water bag are: diameter 400mm-600mm, thickness 3mm-6mm, length 800mm-1000mm, and the number of side water bags is not less than three.

[0016] In one embodiment, the middle of the bottom water bag is hollowed out to form a "hui" character shape. The specifications of the bottom water bag are: outer ring size 1-1.4m, inner ring size 0.5-0.8m, overall height 0.3-0.5m, and ring width 0.1-0.2m.

[0017] In one embodiment, the distance between adjacent bottom water bags is 0.5m-0.8m, and the automatic pressure control water valve is arranged at the drainage place of the bottom water bag.

[0018] In one embodiment, the size of the stainless steel rectangular spring is 0.8cm-1.2cm smaller than the inner ring size of the bottom water bag (100), and the free height is 5cm-10m smaller than the overall height of the water bag. The ultimate compression height of the stainless steel rectangular spring is 10cm-20cm. The isolation shell is two relatively placed square stainless steel barrels, and the sum of the heights of the two square stainless steel barrels is equal to the free height of the stainless steel rectangular spring.

[0019] In one embodiment, the thickness of the PVC waterproof cloth is 1.�mm-3mm, and the connection orientation is hot melt welding. The lap width of the PVC waterproof cloth is 10-15cm, and the pitch of the stainless steel mesh belt chain is 2cm-5cm.

[0020] 9. The anti-fault-breaking and pressure-relieving protection structure for cross-fault urban utility tunnels according to claim 1, characterized in that

[0021] S1. Level and compact the foundation, and successively construct a gravel layer, a low-strength lean concrete cushion layer, and a waterproof layer from bottom to top;

[0022] S2. Lay a stainless steel mesh belt chain at the bottom;

[0023] S3. Set connected water bags at the bottom of the tunnel for support to ensure its stability when stressed, fill with a freezing liquid to enhance the stability and support capacity of the bottom water bags, and place an isolation shell and a stainless steel rectangular spring;

[0024] S4, install an automatic pressure control water valve, and automatically start drainage when the pressure is too large to release part of the liquid in the water bag, and keep the pressure in the water bag within a safe range;

[0025] S5, lay PVC waterproof cloth above the bottom water bag;

[0026] S6, use a total station to accurately measure the installation position of the side water bag, ensure that the error in the horizontal and vertical directions is controlled within ±2mm, mark the installation point of the water bag on the pipe gallery side wall using the ink line elastic line method, ensure that the spacing between each water bag is uniform, and the error is controlled within 5mm, bury an adjustable support frame at each water bag installation position, and set a limit to ensure that the water bag does not shift after being filled with liquid, use expansion bolts to firmly secure the support frame to the pipe gallery side wall, and use adjustable clamps to accommodate the fine adjustment needs of different geological conditions, after the frame is installed, a certain preload is applied to detect whether the frame deforms or loosens, and if there is deviation, secondary reinforcement is required;

[0027] S7, install the side water bag layer by layer from bottom to top, arrange one every 1000-1200mm in the horizontal direction, and temporarily fix the water bag in the support frame using a clamp type limit to ensure that it does not shake or tilt;

[0028] S8, fill the side water bag with frozen liquid, the filling process should be uniform and leak-free, after each side water bag is installed, pressure detection is required to ensure that the pressure of the water bag is within a reasonable range and there is no leakage problem;

[0029] S9, install an automatic pressure control water valve, which releases part of the liquid in the water bag when the pressure is too large, keeping the pressure in the water bag within a safe range;

[0030] S10, fill low-strength foamed solidified soil into the gap between the water bags, after injecting the low-strength foamed solidified soil, the water bag and the external area should be sealed to ensure uniform distribution and solidification of the material, and there should be no gaps during grouting and maintain enough time for the low-strength foamed solidified soil to solidify, forming a high-strength support layer after solidification. The solidification time is 24 to 48 hours.

[0031] Advantages

[0032] 1. Adapt to fault dislocation and improve the anti-deformation ability of the pipe gallery; the combination design of water bag, foamed solidified soil and automatic pressure control water valve can absorb and disperse stress when the fault dislocation occurs, adjust the local pressure through water valve drainage, reduce the direct impact on the main structure of the pipe gallery, and reduce the risk of pipe gallery wall cracking or damage;

[0033] 2. Convenient construction and shortened construction period; the use of foamed solidified soil filling eliminates the need for complex vibration and reinforcement procedures, simplifying the construction process and significantly improving construction efficiency; the water bladder structure can be prefabricated, requiring only on-site installation and filling, making construction simple, reducing labor input, and lowering construction difficulty;

[0034] 3. Local materials can be used to reduce costs; Low-strength foamed solidified soil can be produced using local raw materials such as soil, carbide slag, and fly ash, reducing material transportation costs and conforming to the green and low-carbon concept. During construction, the proportion of foamed solidified soil can be adjusted according to the site conditions to improve material adaptability and reduce construction difficulty. The water bladder material can be made from waste tires.

[0035] 4. Easy to maintain and can be excavated later; due to the low strength of foamed solidified soil, if maintenance or replacement of pipelines is required later, it can be excavated more easily without causing a significant impact on the surrounding structure; compared with traditional concrete foundations, foamed solidified soil still maintains a certain degree of workability after construction, making maintenance and modification more flexible and reducing the maintenance cost of the pipe gallery later. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a vertical sectional view of the present invention;

[0038] Figure 2 This is an exploded view of the present invention;

[0039] Figure 3 This is a schematic diagram of the bottom structure of the present invention;

[0040] Figure 4 This is a top horizontal sectional view of the present invention;

[0041] Figure 5 This is a schematic diagram of the automatic pressure control water valve of the present invention.

[0042] Figure label:

[0043] 100. Water bladder; 200. Stainless steel mesh belt chain; 300. Automatic pressure control water valve; 31. T-shaped pipe body; 32. Spring; 33. Rubber stopper; 400. Low-strength foamed solidified soil; 500. Stainless steel rectangular spring; 600. Isolation shell; 700. PVC waterproof cloth. Detailed Implementation

[0044] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely explain the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0045] It should be noted that when a component is referred to as being "fixed to" or "set to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0046] In addition, the terms "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0048] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0049] The following will be described in conjunction with Figures 1-5 The cross-fault urban comprehensive pipe gallery anti-fault yielding and pressure protection structure and construction method of the present application are described.

[0050] In one embodiment, a fault-crossing urban utility tunnel anti-faulting yielding protection structure comprises:

[0051] A plurality of water bags 100 distributed on both sides and the bottom of the utility tunnel, a stainless steel mesh belt chain 200 arranged on the foundation, and a plurality of stainless steel rectangular springs 500 arranged on the stainless steel mesh belt chain 200, the bottom water bag 100 is arranged between the utility tunnel and the stainless steel mesh belt chain 200, a PVC waterproof cloth 700 is arranged between the top end of the bottom water bag 100 and the utility tunnel, the stainless steel mesh belt chain 200 is placed with a plurality of isolation shells 600 located in the bottom water bag 100, and a plurality of stainless steel rectangular springs 500 are placed in the corresponding isolation shells 600.

[0052] The automatic pressure control water valve 300, a plurality of water bags 100 are connected to each other, and a plurality of automatic pressure control water valves 300 are arranged at the connection of the water bags 100.

[0053] Low-strength foamed solidified soil 400 is injected into the gaps of the plurality of water bags 100 to seal the water bags 100 and the external area of the utility tunnel, and the low-strength foamed solidified soil 400 forms a support layer after solidification.

[0054] The automatic pressure control water valve 300 comprises a T-shaped pipe body 31, a spring 32, and a rubber plug 33, one end of the spring 32 is fixedly connected with the inner wall of the T-shaped pipe body 31, and the other end of the spring 32 is fixedly connected with the rubber plug 33. When the pressure of the side water bag 100 and the bottom water bag 100 is too large, the rubber plug 33 can be pushed by the refrigerant to achieve the effect of water discharge, and when the pressure is stable, the rebound effect of the spring 32 will make the rubber plug 33 return to the original position, ensuring that the side water bag 100 and the bottom water bag 100 are within the predetermined pressure range, thereby improving the safety of the system.

[0055] The ratio of the low-strength foamed solidified soil 400 is:

[0056] The raw soil, the curing agent, the foaming agent, the water reducing agent, the anti-softening agent, and the water are in a ratio of 50%-60%, 15%-20%, 3%-5%, 0.3%-0.8%, 1%-2%, and 25-35% respectively. It should be noted that the raw soil is the fine-grained soil on the construction site; the curing agent is alkali activated gel or cement-based material; the foaming agent is composed of isocyanate and chitosan stabilizing agent, which can react with water to generate carbon dioxide, thereby forming uniform and stable pores in the solidified soil, wherein the proportion of isocyanate is 0.8-4%, and the proportion of chitosan is 0.2-1%; the water reducing agent is a polycarboxylic acid type water reducing agent but not limited to a polycarboxylic acid type; the anti-softening agent is one of polysiloxane, acrylic emulsion, or calcium stearate, or a similar material with the functions of reducing water absorption and enhancing water resistance.

[0057] The low-strength foamed solidified soil 400 is as follows:

[0058]

[0059] To verify the effect of the low-strength foamed stabilized soil 400, in the laboratory, using SHSAS-6000 microcomputer control electronic universal testing machine, displacement sensor measures the compressive strength and variability space of the material under the condition that the thickness of the foamed stabilized soil is 20 cm and the material ratio is different. When the proportion of raw soil is 40%, the deformability space is 9 cm, but the compressive strength decreases to less than 1 MPa, the foam content increases, the material becomes more loose, and the collapse risk increases. When the proportion is 55%, the deformability space is 7 cm, and the compressive strength is about 2 MPa. When the proportion is 70%, the deformability space is 3 cm, and the compressive strength is 3.5 MPa, the deformation ability decreases, and it is close to rigid filling material. When the proportion of cement clinker is 3%, the deformability space is 10 cm, and the compressive strength decreases to 0.5 MPa. Under long-term load, there may be a large settlement, affecting the structural stability. When the proportion is 8%, the deformability space is 6.5 cm, and the compressive strength is 2 MPa. When the proportion is 12%, although the compressive strength increases to 3 MPa, the deformability space is only 2 cm, and the deformability is poor. When the proportion of fly ash is 1%, the deformability space is 8.2 cm, and the compressive strength decreases to 1.5 MP, the strength is low, and the bearing capacity is weak. When the proportion is 5%, the compressive strength is moderate, about 2 MPa, and the deformability space is 5.6 cm. When the proportion is 8%, the compressive strength is 3.1 MPa, and the deformability space is 2.2 cm, the deformability is poor. When the proportion of carbide slag is 1%, the compressive strength decreases to 0.4 MPa, and the setting is slow, the deformability space is 9.3 cm. When the proportion is 3%, the strength is moderate, about 2.3 MPa, and the deformability space is 7.1 cm. When the proportion is 8%, the compressive strength is too high, about 3.1 MPa, and the setting is too fast, which is easy to crack, and the deformability space is 2.4 cm. When the proportion of water glass is 0.3%, the compressive strength is low, about 1.2 MPa, and the gel formation is insufficient, the deformability space is 8.4 cm. When the proportion is 1.5%, the strength is moderate, about 2.3 MPa, and the deformability space is 6.2 cm. When the proportion is 5%, the compressive strength is 3.2 MPa, but the setting is too fast, the brittleness increases, and the deformability space is 3.3 cm. When the proportion of isocyanate is 0.5%, the compressive strength increases to 3 MPa, and the deformability space is 2.9 cm, the strength is too high, the foaming is insufficient, and the compressibility is low. When the proportion is 2%, the strength is moderate, about 2.1 MPa, and the deformability space is 7.3 cm, the bubble holes are uniform, and the strength is moderate. When the proportion is 6%, the strength decreases to 0.3 MPa, and the deformability space is 9.6 cm, the foaming is excessive, the porosity is high, and the strength decreases. When the proportion of chitosan is 0.1%, the compressive strength is 0.3 MPa, and the deformability space is 3.6 cm, the foam stability is poor, the porosity is not uniform, and it is easy to collapse. When the proportion is 0.5%, the compressive strength is 2 MPa, and the deformability space is 6.9 cm. When the proportion is 1.5%, the compressive strength is 2 MPa.8 MPa, the deformable space is 8.6 cm, the foam is overly stable, and the fluidity is poor, affecting the gelling reaction; when the water reducing agent ratio is 0.15%, the deformable space is 2.8 cm, the compressive strength is 3.2 MPa, the paste is thick and viscous, the fluidity is poor, and the compressibility is not good. When the ratio is 0.5%, the deformable space is 7.4 cm, the compressive strength is 2.2 MPa. When the ratio is 1.2%, the deformable space is 9.3 cm, the compressive strength is 0.7 MPa, and there is a situation of excessive foam expansion, affecting the overall uniformity and long-term stability; when the polysiloxane ratio is 0.5%, the water absorption rate is 30%, the waterproof effect is weak, the water absorption rate is high, and the durability decreases. When the ratio is 1.5%, the water absorption rate is 20%. When the ratio is 3%, the water absorption rate is 12%, and it is overly hydrophobic, affecting the gelling reaction and the strength decreases; when the water ratio is 20%, the porosity is 55%, the paste is dry and hard, foaming is difficult, and the fluidity is poor. When the ratio is 30%, the porosity is 76%. When the ratio is 40%, the porosity is 91%, the paste is too thin, the porosity is too large, and the strength decreases.

[0060] The water bladder 100 is filled with a freezing liquid, and the material of the water bladder 100 is a rubber material component. The low-temperature property of the freezing liquid can prevent the liquid from freezing due to the excessively low underground temperature.

[0061] The specifications of the side water bladder 100 are: diameter 400 mm - 600 mm, thickness 3 mm - 6 mm, length 800 mm - 1000 mm, and the number of side water bladders 100 is not less than three.

[0062] The middle of the bottom water bladder 100 is hollowed out to form a "hui" character shape. The specifications of the bottom water bladder 100 are: the outer ring size is 1 - 1.4 m, the inner ring size is 0.5 - 0.8 m, the overall height is 0.3 - 0.5 m, and the ring width is 0.1 - 0.2 m.

[0063] The spacing between adjacent bottom water bladders 100 is 0.5 m - 0.8 m, and the automatic pressure control water valve 300 is set at the drainage place of the bottom water bladder 100.

[0064] The sizes of the stainless steel rectangular springs 500 are all 0.8 cm - 1.2 cm less than the inner ring size of the bottom water bladder 100, and the free height is 5 cm - 10 m less than the overall height of the water bladder 100. The limit compression height of the stainless steel rectangular springs 500 is 10 cm - 20 cm. The isolation shell 600 is two square stainless steel barrels placed opposite to each other, and the sum of the heights of the two square stainless steel barrels is equal to the free height of the stainless steel rectangular springs 500. The size of the inverted square stainless steel barrel is the size of the stainless steel rectangular springs 500, and the size of the upright square stainless steel barrel is 0.5 cm - 1.5 cm less than that of the inverted square stainless steel barrel.

[0065] The thickness of the PVC waterproof cloth 700 is 1.5-3 mm, and the connection direction is hot melt welding. The overlap width of the PVC waterproof cloth 700 is 10-15 cm, and the pitch of the stainless steel mesh belt chain 200 is 2-5 cm.

[0066] A construction method of a cross-fault city comprehensive pipe gallery anti-fault let-in pressure protection structure, comprising the following steps:

[0067] S1, level and compact the foundation, and sequentially perform gravel layer, low-strength lean concrete cushion layer and waterproof layer construction from bottom to top;

[0068] S2, lay the stainless steel mesh belt chain 200 on the bottom;

[0069] S3, set the water bag 100 connected with the pipe gallery on the bottom to support, so as to ensure the stability of the water bag 100 under stress, fill the frozen liquid to enhance the stability and supporting capacity of the bottom water bag 100, and place the isolation shell 600 and the stainless steel rectangular spring 500;

[0070] S4, install the automatic pressure control water valve 300, and automatically start drainage when the pressure is too large, so as to release part of the liquid in the water bag 100 and keep the pressure in the water bag 100 within a safe range;

[0071] S5, lay the PVC waterproof cloth 700 above the bottom water bag 100;

[0072] S6, accurately measure the installation position of the side water bag 100 by using the total station, so as to ensure that the error in the horizontal direction and the vertical direction is controlled within ±2 mm, mark the installation point of the water bag 100 on the pipe gallery side wall by using the ink line elastic line method, ensure that the distance between the water bags 100 is uniform and the error is controlled within 5 mm, bury the adjustable support frame at the installation position of each water bag 100 and set the limit, so as to ensure that the water bag 100 does not displace after being filled with liquid, use the expansion bolt to stably fix the support frame on the pipe gallery side wall, and use the adjustable clamp to adapt to the fine adjustment requirement of different geological conditions, after the frame is installed, a certain preload is applied to detect whether the frame is deformed or loose, and if there is deviation, secondary reinforcement is required;

[0073] S7, install the side water bag 100 layer by layer from bottom to top, arrange one every 1000-1200 mm in the horizontal direction, and temporarily fix the water bag 100 in the support frame by using the clamp type limit, so as to ensure that the water bag 100 does not shake or tilt;

[0074] S8, fill the frozen liquid into the side water bag 100, and the filling process needs to be uniform and leak-free, after the installation of each side water bag 100 is completed, pressure detection is required to ensure that the pressure of the water bag 100 is within a reasonable range and there is no leakage problem;

[0075] S9, install automatic pressure control water valve 300, when the pressure reaches too large, the automatic pressure control water valve 300 releases part of the liquid in the water bag 100, keeps the pressure in the water bag 100 within a safe range;

[0076] S10, fill the low-strength foamed solidified soil 400 into the gap between the water bags 100, after injecting the low-strength foamed solidified soil, the water bag 100 should be sealed from the outside area, ensure the uniform distribution and solidification of the material, ensure that there is no gap during grouting, and maintain enough time for the low-strength foamed solidified soil to solidify, and form a high-strength support layer after solidification, the solidification time is 24 to 48 hours.

[0077] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0078] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A fault-resistant and pressure-bearing protective structure for urban integrated utility tunnels spanning faults, characterized in that, Including: Multiple water bags (100) distributed on both sides and the bottom of the pipe gallery, a stainless steel mesh belt chain (200) arranged on the foundation, and multiple stainless steel rectangular springs (500) arranged on the stainless steel mesh belt chain (200). The water bags (100) at the bottom are arranged between the pipe gallery and the stainless steel mesh belt chain (200). A PVC waterproof cloth (700) is arranged between the top end of the water bags (100) at the bottom and the pipe gallery. Multiple isolation shells (600) located inside the water bags (100) at the bottom are placed on the stainless steel mesh belt chain (200), and multiple stainless steel rectangular springs (500) are placed in the corresponding isolation shells (600); An automatic pressure control water valve (300). The multiple water bags (100) are interconnected, and multiple automatic pressure control water valves (300) are arranged at the joints of the water bags (100); Low-strength foamed solidified soil (400), which is poured into the gaps between the multiple water bags (100) to seal the area between the water bags (100) and the external area of the pipe gallery. After the low-strength foamed solidified soil (400) is solidified, a support layer is formed; The automatic pressure control water valve (300) includes a T-shaped pipe body (31), a spring (32), and a rubber plug (33). One end of the spring (32) is fixedly connected to the inner wall of the T-shaped pipe body (31), and the other end of the spring (32) is fixedly connected to the rubber plug (33); The water bags (100) are filled with a refrigerant, and the middle part of the water bags (100) at the bottom is hollowed out to form a "hui" character shape; The isolation shell (600) is two square stainless steel barrels placed opposite to each other, and the sum of the heights of the two square stainless steel barrels is equal to the free height of the stainless steel rectangular spring (500); 2. The anti-fault pressure protection structure for cross-fault urban integrated utility tunnels according to claim 1, characterized in that, The mixing ratio of the low-strength foamed solidified soil (400) is as follows: The mixing ratios of raw soil, curing agent, foaming agent, water reducing agent, anti-softening agent, and water are respectively 50%-60%, 15%-20%, 3%-5%, 0.3%-0.8%, 1%-2%, and 25-35%; 3. The anti-fault pressure protection structure for cross-fault urban integrated utility tunnels according to claim 1, characterized in that, The material of the water bags (100) is a rubber material component; 4. The anti-faulting and pressure-relief protection structure for cross-fault urban integrated utility tunnels according to claim 1, characterized in that, The specifications of the water bags (100) on the side are: diameter 400mm - 600mm, thickness 3mm - 6mm, length 80mm - 1000mm, and the number of the water bags (100) on the side is not less than three; 5. The anti-fault pressure protection structure for cross-fault urban integrated utility tunnels according to claim 1, characterized in that, The specifications of the water bags (100) at the bottom are: outer ring size 1 - 1.4m, inner ring size 0.5 - 0.8m, overall height 0.3 - 0.5m, and ring width 0.1 - 0.2m; 6. The anti-fault pressure protection structure for cross-fault urban integrated utility tunnels according to claim 1, characterized in that, The distance between adjacent water bags (100) at the bottom is 0.5m - 0.8m, and the automatic pressure control water valve (300) is arranged at the drainage place of the water bags (100) at the bottom; 7. The anti-fault pressure protection structure for cross-fault urban integrated utility tunnels according to claim 1, characterized in that, The size of the stainless steel rectangular spring (500) is 0.8cm - 1.2cm less than the inner ring size of the water bags (100) at the bottom, and the free height is 5cm - 10cm less than the overall height of the water bags (100). The ultimate compression height of the stainless steel rectangular spring (500) is 10cm - 20cm; 8. The anti-fault pressure protection structure for cross-fault urban integrated utility tunnels according to claim 1, characterized in that, The PVC waterproof fabric (700) has a thickness of 1.5mm-3mm and the connection is hot-melt welding. The overlap width of the PVC waterproof fabric (700) is 10-15cm, and the pitch of the stainless steel mesh belt chain (200) is 2cm-5cm.

9. A construction method for a fault-resistant urban integrated utility tunnel anti-fault pressure-bearing protection structure, according to any one of claims 1 to 8, comprising the following steps: S1. Level and compact the foundation, and proceed from bottom to top with the following steps: crushed stone layer, low-strength lean concrete cushion layer, and waterproof layer. S2. Lay a stainless steel mesh belt chain (200) at the bottom. S3. Connected water bladders (100) are installed at the bottom of the pipe rack for support to ensure its stability under stress. The bladders are filled with coolant to enhance the stability and support capacity of the bottom water bladders (100), and an isolation shell (600) and a stainless steel rectangular spring (500) are placed. S4. Install an automatic pressure control water valve (300), and automatically start drainage when the pressure reaches too high, releasing part of the liquid in the water bladder (100) to keep the pressure in the water bladder (100) within a safe range; S5. Lay a PVC waterproof cloth (700) on top of the bottom water bladder (100). S6. Use a total station to accurately measure the installation position of the side water bladders (100) to ensure that the error in both the horizontal and vertical directions is controlled within ±2mm. Use the ink line method to mark the installation points of the water bladders (100) on the side wall of the pipe gallery to ensure that the spacing between each water bladder (100) is uniform and the error is controlled within 5mm. Install an adjustable support frame at the installation position of each water bladder (100) and set a limit to ensure that the water bladder (100) will not be displaced after being filled with liquid. Use expansion bolts to stabilize the support frame on the side wall of the pipe gallery and use adjustable clamps to adapt to the fine adjustment requirements of different geological conditions. After the frame is installed, apply a certain preload and check whether the frame is deformed or loose. If there is a deviation, secondary reinforcement is required. S7. Install side water bags (100) layer by layer from bottom to top. Arrange one every 1000mm-1200mm in the horizontal direction. Use clamp-type limiters to temporarily fix the water bags (100) in the support frame to ensure that they do not shake or tilt. S8. Fill the side water bladders (100) with coolant. The filling process must be uniform and leak-free. After each side water bladder (100) is installed, a pressure test must be performed to ensure that the pressure of the water bladder (100) is within a reasonable range and there is no leakage. S9. Install an automatic pressure control water valve (300). When the pressure becomes too high, the automatic pressure control water valve (300) releases part of the liquid in the water bladder (100) to keep the pressure in the water bladder (100) within a safe range. S10. Inject low-strength foamed solidified soil (400) into the gap between the water bladders (100). After injecting the low-strength foamed solidified soil, seal the water bladders (100) and the external area to ensure uniform distribution and solidification of the material. During grouting, ensure that there are no gaps and maintain sufficient time for the low-strength foamed solidified soil to solidify. After solidification, a high-strength support layer is formed. The solidification time is 24 to 48 hours.

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