Bolt hole plugging linkage device for shield segment of urban hydraulic pipeline and using method of bolt hole plugging linkage device

Abstract

The invention discloses an urban hydraulic pipeline shield segment bolt hole plugging linkage device and a using method thereof, and belongs to the technical field of urban hydraulic water conveying pipeline facility engineering. The prefabricated filling structures are plugged through the bolt holes at the two ends of the elastic connecting piece to plug the leakage weak points, namely the bolt holes, of the shield segment; through the characteristic that the bolt and the nut are protruded before and after the bolt penetrates into the bolt hole, a nut hollow wall-hanging structure and a bolt hollow wall-hanging structure with the same outline are reserved in the bolt hole plugging prefabricated filling structure, so that the bolt hole plugging prefabricated filling structure is installed on the bolt hole; according to the characteristic that the bolt holes in the edge of the shield segment are symmetrically arranged in pairs for use, the light thin steel sheets are used for blocking the adjacent bolt holes together, and the blocking efficiency is improved. The underground water leakage path can be effectively prevented, water resource pollution in the water conveying pipeline is avoided, the waterproof performance of the hydraulic water conveying pipeline is improved, the smoothness of the pipeline is improved, and the water environment problems such as water flow disorder and water conveying efficiency reduction are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of urban hydraulic water supply pipeline facility engineering, and relates to an urban hydraulic pipeline shield segment bolt hole plugging linkage device and a use method thereof. Background Art

[0002] In order to speed up the construction of major water network projects and give full play to the advantages and comprehensive benefits of super-large-scale water conservancy engineering systems, water conservancy projects such as flood control and disaster reduction, urban and rural water supply, and farmland irrigation have been built and started. As an important long-distance water transmission hydraulic structure, urban hydraulic water pipelines are widely used in major water conservancy projects. With the continuous development of modern science and technology, pipeline construction currently mainly uses the shield method of tunnel excavation with a high degree of mechanization, fast excavation speed, and small construction disturbance. However, when the pipeline passes through complex water-rich strata, groundwater can easily penetrate into the surrounding rock through the tiny gaps between the bolts and the hand hole wall, causing water pollution in the pipe. In addition, the turbulent flow state of the water flow in the pipe caused by the special-shaped structure of the shield segment bolt hole will significantly reduce the water transmission efficiency and seriously affect the project benefits.

[0003] Shield tunnel pipelines face the pressure of groundwater in underground projects. If the hand hole bolts are not blocked, groundwater can easily penetrate into the surrounding rock through the tiny gap between the bolts and the hand hole wall, and then enter the tunnel, causing pollution to the water source and water environment; and after the water pipeline is put into operation, a large number of shield segment bolt holes along the way will seriously affect the water environment and hydraulic elements such as water flow pattern, increase local hydraulic losses, greatly reduce water transmission efficiency, and have a great impact on the normal operation of the water transmission project. Blocking can effectively block the leakage path of groundwater and improve the overall waterproof performance of hydraulic pipelines; sealing can prevent water vapor and corrosive media (such as certain chemical components in the soil) in the external environment from contacting the bolts, and avoid rust and corrosion of the bolts. Rusty bolts will reduce their connection strength and affect the service life of urban water pipelines, while blocking measures can provide a relatively stable environment for the bolts, extend the service life of the project, and thus ensure the long-term stability of the pipeline structure; blocking can avoid the influence of local position variation of the pipeline on the flow pattern of water flow, and avoid the influence of the existence of bolt holes on the water transmission efficiency of the pipeline.

[0004] At present, the conventional blocking method is to use cement mortar or epoxy mortar to fill the segment hand holes or other building materials by manual application after the shield excavation construction is completed. This construction method is called hand hole blocking. Ordinary cement mortar is made by mixing cement, sand and water in a certain proportion. Although its material source is relatively wide and the cost is low, it is prone to cracking in the later stage. Epoxy mortar uses epoxy resin as the gelling material and adds curing agent, sand and other filling materials to mix. It has high strength and high adhesion, but the cost is high and the construction process is also complicated. In addition to the disadvantages of the materials, both of them seal the bolt holes by manual application, and there are a series of problems in the sealing effect, such as cracking, falling off, and failure. Summary of the invention

[0005] The purpose of the present invention is to provide a bolt hole plugging linkage device for shield segments of urban hydraulic pipelines and a method of using the same, so as to solve the technical problems that the prior art has poor effect in plugging the hand holes of the segments, easily leading to water resource pollution in the water supply pipeline and causing adverse effects on the water environment.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a bolt hole plugging linkage device for a shield segment of an urban hydraulic pipeline, comprising a bolt hole plugging prefabricated filling structure; two bolt hole plugging prefabricated filling structures are provided, and the two bolt hole plugging prefabricated filling structures are connected by an elastic connecting piece; the bolt hole plugging prefabricated filling structure is used to fill the bolt holes of the shield segment.

[0007] Furthermore, the bolt hole plugging prefabricated filling structure is a tetrahedral structure, which includes an arc surface and three planes; the top surface of the bolt hole plugging prefabricated filling structure is the arc surface, and the two ends of the elastic connecting piece are respectively connected to the bottom surface of the bolt hole plugging prefabricated filling structure.

[0008] Furthermore, among the two bolt hole plugging prefabricated filling structures, one bolt hole plugging prefabricated filling structure is provided with a nut hollow wall hanging structure, and the other bolt hole plugging prefabricated filling structure is provided with a bolt hollow wall hanging structure; the nut hollow wall hanging structure and the bolt hollow wall hanging structure are respectively located on opposite surfaces of the two bolt hole plugging prefabricated filling structures.

[0009] Furthermore, the hollow nut wall hanging structure and the hollow bolt wall hanging structure are both blind hole structures opened on the bolt hole blocking prefabricated filling structure.

[0010] Furthermore, the elastic connecting piece is a lightweight elastic anti-corrosion steel sheet; and the surface of the bolt hole plugging prefabricated filling structure is coated with a sticky material.

[0011] Furthermore, the bolt hole sealing prefabricated filling structure is made of a flexible material, has a cavity inside, and has an inflation port on the surface of the bolt hole sealing prefabricated filling structure for inflating the cavity.

[0012] Furthermore, each of the inflation ports is connected to a hose, and a bellows is provided outside the hose. The inner diameters of the bellows provided outside the two inflation ports are different, and the bellows with a smaller inner diameter are connected to the bellows with a larger inner diameter. A groove is provided at the bottom of the elastic connector, and the bellows is located in the groove.

[0013] Furthermore, a sealing gasket is installed between the inner wall of the bellows orifice with a larger inner diameter and the outer wall of the bellows orifice with a smaller inner diameter.

[0014] Furthermore, the sticky material is epoxy putty surface sticky material.

[0015] In a second aspect, the present invention provides a method for using the above-mentioned urban hydraulic pipeline shield segment bolt hole blocking linkage device, comprising the following steps: When plugging the bolt holes of the shield segment, firstly, a viscous material is coated on the surface of the bolt hole plugging prefabricated filling structure, a bending force is applied to the elastic connector to bend it, and then the bolt hole plugging prefabricated filling structure is embedded in the corresponding shield segment bolt hole, and the elastic connector is loosened to make it automatically rebound close to the segment wall surface; Inflate the cavity of the bolt hole plugging prefabricated filling structure through a hose until the bolt hole plugging prefabricated filling structure fits tightly against the inner wall of the bolt hole; After the inflation is completed, the two bellows pipe ends outside the hose are connected together, and adhesive is applied to the joints for sealing.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention discloses a bolt hole plugging linkage device for a shield pipe segment of an urban hydraulic pipeline and a use method thereof. The two bolt holes of the shield pipe segment are plugged by bolt hole plugging prefabricated filling structures at both ends of an elastic connector. The bolt holes have the characteristics of protruding bolts and nuts before and after the bolts are inserted. A nut hollow wall hanging structure and a bolt hollow wall hanging structure with the same contour are reserved in the bolt hole plugging prefabricated filling structure, so as to achieve the effect of installing the bolt hole plugging prefabricated filling structure on the bolt hole. The invention utilizes the characteristics of symmetrical arrangement of the bolt holes in pairs to use a lightweight thin steel sheet to plug adjacent bolt holes together, thereby improving the plugging efficiency. By sealing the bolt holes, water vapor and corrosive media in the external environment can be prevented from contacting the bolts, thus preventing the bolts from rusting and corroding, enhancing the connection stability between the pipe segments, and improving the safety and service life of the project; and by sealing the bolt holes of the shield segments of the urban hydraulic water supply pipeline, the leakage path of groundwater can be effectively blocked, thus avoiding the pollution of water resources in the water supply pipeline, improving the overall waterproof performance of the tunnel, and at the same time, due to the operation of sealing the holes, the smoothness of the pipeline is improved, and water environment problems such as water flow turbulence are avoided. In addition, the bolt hole sealing prefabricated filling structure of the present invention is a prefabricated filling material, which avoids the disadvantages of uneven filling material quality caused by manual work and poor working environment on site, and at the same time greatly shortens the construction period on site, achieving the purpose of optimizing the construction period and putting the project into production as soon as possible.

[0017] Furthermore, the viscous material coated on the surface of the bolt hole plugging prefabricated filling structure of the present invention is selected from epoxy putty surface viscous material with less sand content, lighter texture and finer texture, so that the bolt hole wall and the bolt hole plugging prefabricated filling structure are tightly combined.

[0018] Furthermore, the bolt hole plugging prefabricated filling structure of the present invention is made of a flexible material, and has a cavity inside, and the cavity is inflated to form a certain internal pressure, so that the bolt hole plugging prefabricated filling structure can better fit the inner wall of the bolt hole. In addition, such a plugging structure is lighter and less likely to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of a bolt hole plugging linkage device for shield segments of urban hydraulic pipelines according to the present invention; Figure 2It is a front view of a bolt hole plugging linkage device for shield segments of urban hydraulic pipelines according to the present invention; Figure 3 It is a top view of a bolt hole plugging linkage device for shield segments of urban hydraulic pipelines of the present invention; Figure 4 It is a two-dimensional plane front view of a bolt hole blocking linkage device for a shield segment of an urban hydraulic pipeline according to the present invention.

[0021] Among them: 1-viscous material; 2-nut hollow wall-mounted structure; 3-bolt hole plugging prefabricated filling structure; 4-lightweight elastic anti-corrosion steel sheet; 5-bolt hollow wall-mounted structure. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1 and Figure 2 The embodiment of the present invention discloses a bolt hole plugging linkage device for shield segments of urban hydraulic pipelines, including a bolt hole plugging prefabricated filling structure 3; two bolt hole plugging prefabricated filling structures 3 are provided, and the two bolt hole plugging prefabricated filling structures 3 are connected by an elastic connector; the bolt hole plugging prefabricated filling structure 3 is used to fill the bolt holes of the shield segment. In this embodiment, the two bolt holes of the shield segment are plugged by the bolt hole plugging prefabricated filling structures 3 at both ends of the elastic connector, and the two bolt hole plugging prefabricated filling structures 3 are connected by an elastic connector. By utilizing the bendable and resilient characteristics of the elastic connector, when installing the device of this embodiment, a small force is applied in advance to bend the elastic connector. When the bolt hole plugging prefabricated filling structure 3 is embedded in the bolt hole, the steel sheet is loosened, and the elastic connector automatically rebounds to restore the original state and cling to the wall of the segment to complete the plugging.

[0029] In a feasible embodiment of the present invention, the bolt hole plugging prefabricated filling structure 3 is a tetrahedron structure, and the tetrahedron structure includes a curved surface and three planes; the top surface of the bolt hole plugging prefabricated filling structure 3 is the curved surface, and the two ends of the elastic connector are respectively connected to the bottom surface of the bolt hole plugging prefabricated filling structure 3. The two side edges and the top of the bolt hole plugging prefabricated filling structure 3 in this embodiment are the entire curved surface structure, and such a shape design can fit tightly with the inner wall of the shield segment bolt hole, making the plugging more secure.

[0030] In a possible embodiment of the present invention, see Figure 3 and Figure 4Among the two bolt hole plugging prefabricated filling structures 3, a nut hollow wall hanging structure 2 is provided on one bolt hole plugging prefabricated filling structure 3, and a bolt hollow wall hanging structure 5 is provided on the other bolt hole plugging prefabricated filling structure 3; the nut hollow wall hanging structure 2 and the bolt hollow wall hanging structure 5 are respectively located on the opposite surfaces of the two bolt hole plugging prefabricated filling structures 3. In this embodiment, the bolt hole plugging prefabricated filling structure 3 is hung on the bolt hole by the nut hollow wall hanging structure 2 and the bolt hollow wall hanging structure 5, so as to achieve efficient plugging.

[0031] In a feasible embodiment of the present invention, the hollow nut wall hanging structure 2 and the hollow bolt wall hanging structure 5 are both blind hole structures arranged on the bolt hole blocking prefabricated filling structure 3. The blind hole structures are respectively adapted to the bolts and nuts in the bolt holes of the shield segment, so as to achieve the effect of installing the bolt hole blocking prefabricated filling structure 3 on the bolt hole. Preferably, the bolt hole blocking prefabricated filling structure 3 can be made into a steel sheet cavity structure, and the hollow nut wall hanging structure 2 and the hollow bolt wall hanging structure 5 are made of waterproof rubber material, so that the ductile and deformable characteristics of the rubber can help the structure to press the bolts and nuts during the later inflation.

[0032] In a feasible embodiment of the present invention, the elastic connector is a lightweight elastic anti-corrosion steel sheet 4, which reduces the weight of the entire device, can be better installed on the shield segment, can resist erosion in various corrosive environments, and improves service life. The surface of the bolt hole plugging prefabricated filling structure 3 is coated with a viscous material 1, and the viscous material 1 preferably uses an epoxy putty surface viscous material with less sand content, lighter texture, and finer texture, so as to achieve the beneficial effect of close integration of the bolt hole wall and the bolt hole plugging structure.

[0033] In a feasible embodiment of the present invention, the bolt hole plugging prefabricated filling structure 3 is made of a flexible material, including but not limited to a rubber material, and the bolt hole plugging prefabricated filling structure 3 has a cavity inside, and an inflation port is left on the surface of the bolt hole plugging prefabricated filling structure 3 for inflating the cavity. This embodiment can make the bolt hole plugging prefabricated filling structure better fit the inner wall of the bolt hole by inflating the cavity. And such a plugging structure is lighter and not easy to fall off. Preferably, each of the inflation ports is connected to a hose, and a bellows is sleeved on the outside of the hose. The inner diameters of the bellows arranged outside the two inflation ports are different, and the bellows with a smaller inner diameter are sleeved in the bellows with a larger inner diameter; the bottom of the elastic connector is provided with a groove, and the bellows are located in the groove. A sealing gasket is installed between the inner wall of the bellows with a larger inner diameter and the outer wall of the bellows with a smaller inner diameter. In this embodiment, after the cavity is inflated, the two bellows are connected so that the left and right cavity structures are connected into a closed space, and the internal pressure is maintained to ensure the tightening of the bolts, and the inflated hose can be stuck into the groove of the elastic connecting piece, so as not to form a redundant structure hanging outside and affecting the flow state of water in the pipeline.

[0034] The embodiment of the present invention discloses a method for using a bolt hole plugging linkage device for a shield segment of an urban hydraulic pipeline, comprising the following steps: S1, when plugging the bolt holes of the shield segment, firstly, apply a viscous material 1 on the surface of the bolt hole plugging prefabricated filling structure 3, apply a bending force to the elastic connector to bend it, then embed the bolt hole plugging prefabricated filling structure 3 into the corresponding shield segment bolt hole, and loosen the elastic connector to make it automatically rebound close to the segment wall surface; S2, inflating the cavity of the bolt hole plugging prefabricated filling structure 3 through a hose until the bolt hole plugging prefabricated filling structure 3 is tightly attached to the inner wall of the bolt hole; S3, after the inflation is completed, the two bellows ports outside the hose are connected together, and adhesive is applied at the connection to seal it.

[0035] After the structure of this embodiment is prefabricated, professional construction personnel can aim at the position of the bolt hole near the segment, gently apply bending force to the lightweight elastic anti-corrosion steel sheet 4, so that the steel sheet is gently bent, and the bolt hole plugging prefabricated filling structure 3 is embedded in the corresponding position of the bolt hole at the same time, and the lightweight elastic anti-corrosion steel sheet 4 is loosened to make it automatically rebound close to the segment wall, and then the cavity of the bolt hole plugging prefabricated filling structure 3 is inflated through a hose until the bolt hole plugging prefabricated filling structure 3 is tightly attached to the inner wall of the bolt hole; at this time, through the bonding force of the viscous material 1, the supporting force of the reserved hole position of the prefabricated filling structure (the hollow nut hanging wall structure 2 or the hollow bolt hanging wall structure 5), the supporting force formed after the rebound of the lightweight elastic anti-corrosion steel sheet 4, and the air pressure in the cavity of the bolt hole plugging prefabricated filling structure 3, the four forces act simultaneously, and the prefabricated filling structure can be tightly embedded in the bolt hole. At the same time, because the thin steel sheet structure is used on the outside of the bolt hole, the wall surface of the shield segment can also be guaranteed to be smooth and basically without protrusions. It solves a series of problems caused by cracking, falling off and local structural variation of existing sealing technologies, including flow disorder, reduced water transmission efficiency and water resource pollution caused by groundwater leakage.

[0036] In view of the problem that the existing manual filling materials used to seal bolt holes are prone to cracking and even falling off during use, the present invention considers adopting a prefabricated filling structure. The prefabricated filling structure has a better manufacturing environment, and an effective and reliable quality inspection plan can be formulated to ensure that the structure will not crack or fail during use. In view of the phenomenon that the prefabricated filling structure 3 for sealing bolt holes often falls off due to heavy gravity, when selecting the material for the prefabricated filling structure, a sealing material with light weight, good flexibility, elasticity, and adhesion is specially selected, which can adapt to the deformation of the tunnel structure and overcome the problem of falling off due to excessive weight. In order to increase the supporting force and friction between the prefabricated filling structure and the bolt hole, in view of the characteristic that a certain length of bolt will be retained after the bolt is inserted into the bolt hole, a hollow structure is reserved at the corresponding position in the prefabricated filling structure to provide a structural support point for the pipe wall, thereby increasing the supporting force and friction.

[0037] Secondly, considering the characteristic that bolt holes are used in pairs, it is determined that the bolt holes of adjacent segments will be blocked simultaneously to shorten the blocking time and improve the blocking efficiency; after careful consideration, a lightweight elastic anti-corrosion steel sheet 4 is connected to the bottom of the prefabricated blocking material adjacent to the bolt holes. By utilizing its bendable and rebounding characteristics, a small force is applied in advance to bend the steel sheet when installing the inventive structure. When the prefabricated filling structure is embedded in the bolt hole, the steel sheet is loosened, and the steel sheet is restored to its original state and tightly attached to the wall of the segment through its automatic rebound characteristics.

[0038] The principle of the present invention is as follows: At present, the plugging of bolt holes is mostly carried out by filling and smoothing with cement mortar or epoxy mortar. Cement mortar is a mixture of cement, sand and water in a certain proportion. Although its material source is relatively wide and the cost is low, it is often used in the process of being used. Due to the poor on-site working conditions and uneven mixing, the bonding force is limited, the bonding is not firm and eventually falls off. At the same time, during the construction process, due to the expansion and contraction of water and the influence of ambient temperature, the shrinkage of cement mortar is large. After the plugging solidifies, it is easy to crack, resulting in a short service life and excessive maintenance costs in the later period. Epoxy mortar is made of epoxy resin as the gelling material, and is mixed with curing agent, sand and other filling materials. It has the characteristics of high strength, high adhesion, low shrinkage, and good waterproof and corrosion resistance. However, its construction is difficult and requires professional technicians to operate. It has high requirements for the construction environment and conditions. For example, temperature, humidity, and ventilation will affect the quality of the period. If the construction is improper, it may affect the effect and service life of the material. Therefore, the cost of epoxy mortar is relatively higher, the construction process requirements are more stringent, and the cost in actual use is also very high. Secondly, regarding the plugging of the bolt holes of the tunnel shield segments, because the segments are arranged in a ring, many of the bolt holes of the segments are facing downward, especially the bolt holes of the top segments. Because the filling material does not have enough support points and the filling material has a large deadweight, the bonding surface is only connected by adhesion before or after the filling material solidifies, which often leads to loose bonding, and eventually the plugging material will loosen or fall off, resulting in plugging failure. Finally, because the plugging materials need to go through multiple steps such as batching, mixing, filling, leveling, solidification and drying on site, the overall construction time is greatly increased, which indirectly increases the cost of the project, and also affects the overall work body, affecting the early completion and operation of the project. In summary, the actual effect of the current plugging method for the bolt holes of the shield segments of hydraulic tunnels is not ideal, and the plugging effect is greatly reduced due to various reasons. It is urgent to explore a new plugging structure to solve the problem of plugging the bolt holes of the shield segments.

[0039] Therefore, the present invention proposes a bolt hole plugging linkage device for shield segments of urban hydraulic pipelines and a method for using the same. The structure of the device is specifically as follows: Figure 1As shown, it can be mainly divided into three parts. The first is the bolt hole plugging prefabricated filling structure 3, which is made of materials with good flexibility, high elasticity and adhesion, and can adapt to the deformation of the tunnel structure. At the same time, after the bolt is inserted into the structural bolt mouth, part of the bolt will be left exposed. When prefabricating the filling structure, according to the length and shape of the bolt leakage, the bolt hollow wall hanging structure 5 and the nut hollow wall hanging structure 2 are also reserved at the corresponding position of the bolt hole plugging prefabricated filling structure 3, so as to stably embed the bolt prefabricated filling structure into the bolt hole later. After observing the actual location of the bolt holes and the method of assembling the segments, it was found that the bolt holes of adjacent shield segments were used in pairs. The present invention uses this feature to form a pair of bolt holes connected in pairs, and uses this feature to perform synchronous plugging. Specifically, the prefabricated filling structures of the bolt holes in pairs are symmetrically placed, and are connected at the bottom by a lightweight anti-corrosion steel sheet 4 with good elasticity. The sheet can be completely attached to the surface of the shield segment in a natural state, and the length of the steel sheet is determined by the distance between the adjacent bolt holes of the two segments. The cavity of the bolt hole plugging prefabricated filling structure 3 can also be inflated through a hose, so that the bolt hole plugging prefabricated filling structure 3 can fit tightly to the inner wall of the bolt hole. Finally, before the urban hydraulic pipeline shield segment bolt hole plugging linkage device is used, a layer of ultra-light adhesive material 1 is applied to the surface of the prefabricated plugging structure to increase the bonding force between the device and the inner wall of the bolt hole.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bolt hole plugging linkage device for shield segments of urban hydraulic pipelines, characterized in that: It comprises a bolt hole plugging prefabricated filling structure (3); two bolt hole plugging prefabricated filling structures (3) are provided, and the two bolt hole plugging prefabricated filling structures (3) are connected by an elastic connecting piece; the bolt hole plugging prefabricated filling structure (3) is used to fill the bolt holes of shield segments.

2. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 1 is characterized in that: The bolt hole sealing prefabricated filling structure (3) is a tetrahedral structure, comprising an arc surface and three planes; the top surface of the bolt hole sealing prefabricated filling structure (3) is the arc surface, and the two ends of the elastic connecting piece are respectively connected to the bottom surface of the bolt hole sealing prefabricated filling structure (3).

3. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 2 is characterized in that: Of the two bolt hole blocking prefabricated filling structures (3), one bolt hole blocking prefabricated filling structure (3) is provided with a nut hollow wall hanging structure (2), and the other bolt hole blocking prefabricated filling structure (3) is provided with a bolt hollow wall hanging structure (5); the nut hollow wall hanging structure (2) and the bolt hollow wall hanging structure (5) are respectively located on opposite surfaces of the two bolt hole blocking prefabricated filling structures (3).

4. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 3 is characterized in that: The nut hollow wall hanging structure (2) and the bolt hollow wall hanging structure (5) are both blind hole structures opened on the bolt hole blocking prefabricated filling structure (3).

5. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 1 is characterized in that: The elastic connecting piece is a lightweight elastic anti-corrosion steel sheet (4); and the surface of the bolt hole plugging prefabricated filling structure (3) is coated with a viscous material (1).

6. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 1 is characterized in that: The bolt hole sealing prefabricated filling structure (3) is made of a flexible material, the bolt hole sealing prefabricated filling structure (3) has a cavity inside, and an inflation port is left on the surface of the bolt hole sealing prefabricated filling structure (3) for inflating the cavity.

7. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 1 is characterized in that: Each of the inflation ports is connected to a hose, and a bellows is sleeved outside the hose. The inner diameters of the bellows sleeved outside the two inflation ports are different, and the bellows with a smaller inner diameter are sleeved inside the bellows with a larger inner diameter. A groove is provided at the bottom of the elastic connector, and the bellows is located in the groove.

8. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 7 is characterized in that: A sealing gasket is installed between the inner wall of the bellows pipe opening with a larger inner diameter and the outer wall of the bellows pipe opening with a smaller inner diameter.

9. The urban hydraulic pipeline shield segment bolt hole plugging linkage device according to claim 8, characterized in that: The sticky material (1) is an epoxy putty surface sticky material.

10. A method for using the urban hydraulic pipeline shield segment bolt hole plugging linkage device according to any one of claims 1 to 9, characterized in that: The following steps are involved: When plugging the bolt holes of the shield segment, firstly, a viscous material (1) is coated on the surface of the bolt hole plugging prefabricated filling structure (3), a bending force is applied to the elastic connector to bend it, and then the bolt hole plugging prefabricated filling structure (3) is embedded in the corresponding shield segment bolt hole, and the elastic connector is loosened to make it automatically rebound close to the segment wall surface; Inflate the cavity of the bolt hole blocking prefabricated filling structure (3) through a hose until the bolt hole blocking prefabricated filling structure (3) fits tightly against the inner wall of the bolt hole; After the inflation is completed, the two bellows pipe ends outside the hose are connected together, and adhesive is applied to the joints for sealing.

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