An arch shield vault block with a quick connection device and a three-dimensional waterproof system

Abstract

The present invention provides a kind of arched shield vault block with both quick connection device and three-dimensional waterproof system, the vault block body has a single arch shape at the top, and a downward convex shape at the bottom, which is matched and arranged above the groove at the top of the lining ring of the arched shield tunnel; the quick connection device includes a T-U quick joint and a positioning pin; the T-U quick joint includes a T-shaped protruding component and a U-shaped groove component, and the threaded anchor bar connected at one end of the T-shaped protruding component is pre-buried in the lining ring segment block adjacent to the vault block body; a plurality of threaded anchor bars connected on the back of the U-shaped groove component are pre-buried in the vault block body; the T-shaped protruding component is connected to the U-shaped groove component; the vault block bodies adjacent in the longitudinal direction are connected by positioning pins; the three-dimensional waterproof system includes a hollow silicone strip, and the vault block body is horizontally annularly provided with a hollow silicone strip groove, and a hollow silicone strip is provided in the hollow silicone strip groove. The present invention can meet the needs of vault block limitation, avoiding vault block floating and temporary water stopping of joints.

Description

Technical Field

[0001] The invention belongs to the field of shield tunnel engineering, and in particular relates to an arched shield vault block with a quick joint device and a three-dimensional waterproof system. Background Art

[0002] With the rapid development of urban rail transit and the continuous development and utilization of underground space, the underground environment has become more and more complex. Therefore, it is necessary to reasonably arrange tunnel sections, save underground space, and improve construction efficiency. In recent years, the domestic engineering community has developed and implemented a variety of special-shaped shield tunnel sections, and has conducted good research on underground space utilization and construction efficiency. However, the currently implemented special-shaped shield section forms have limitations in their use and lack of wide applicability for a variety of different strata and different burial depths. Therefore, based on the current needs of underground engineering construction, it will be of great exploration value and promotion significance to study and design a set of shield tunnel section forms with reasonable structural force, strong stratum applicability, high space utilization and significantly improved construction efficiency.

[0003] The double-circle shield lining is one of the current double-line shield lining structures. The inverted triangular soil at the arch position of the double-circle shield method is unstable during the shield excavation process and is very easy to fall and form a cavity, which in turn causes a large surface settlement. Therefore, improving the cross-sectional form of the shield tunnel to alleviate the soil arch effect of the shield shell, the disturbance of the shield shell back soil and the stratum, thereby reducing the settlement, while meeting the needs of rapid installation and temporary water stopping at the joints is an urgent problem to be solved. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an arched shield vault block with a quick connection device and a three-dimensional waterproof system, which can meet the requirements of vault block limitation, preventing vault block from floating up and temporary water stopping of joints. The setting of the arched shield vault block effectively improves the soil arch effect of the shield shell, the shield shell back soil and the stratum disturbance, thereby reducing settlement.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a dome shield vault block with a quick connection device and a three-dimensional waterproof system, comprising a vault block body, a quick connection device, and a three-dimensional waterproof system;

[0007] The top of the vault block body is in a single arch shape, and the bottom of the vault block body is in a downward convex shape matching the groove at the top of the lining ring of the arched shield tunnel, and the cross section of the lining ring of the arched shield tunnel is in a transverse "8" shape; the vault block body is arranged above the groove at the top of the lining ring of the arched shield tunnel, and the top of the structural cross section composed of the vault block body and the lining ring of the arched shield tunnel is in a slightly arched shape;

[0008] The quick joint device includes a TU quick joint and a positioning pin; the lining ring segment block adjacent to the vault block body in the lining ring of the arch shield tunnel is connected to the vault block body through the TU quick joint; the TU quick joint includes a T-shaped protruding component and a U-shaped groove component, one end of the T-shaped protruding component is connected with a threaded anchor bar, and the threaded anchor bar connected to the T-shaped protruding component is pre-buried in the lining ring segment block adjacent to the vault block body; the back of the U-shaped groove component is connected with a plurality of threaded anchor bars, and the threaded anchor bars connected to the U-shaped groove component are pre-buried in the vault block body; the T-shaped protruding component is connected to the U-shaped groove component; the vault block bodies adjacent to each other in the longitudinal direction are connected by the positioning pin;

[0009] The three-dimensional waterproof system includes a hollow silicone strip, a hollow silicone strip groove is horizontally annularly arranged on the arch block body, and the hollow silicone strip is annularly arranged in the hollow silicone strip groove.

[0010] Preferably, the T-shaped raised components are arranged in a dot-like manner on the outer skin of the lining ring segment blocks adjacent to the vault block body in the lining ring of the arch shield tunnel; and the U-shaped groove components are arranged in a strip-like manner on the left and right sides of the vault block body.

[0011] Preferably, two T-shaped protruding components are longitudinally arranged on the outer skin of the lining ring segment block adjacent to the vault block body in the lining ring of the arched shield tunnel, close to the vault block body.

[0012] Preferably, the T-shaped protruding component is a steel component shaped like the letter T, and the U-shaped groove component is a steel strip groove with a cross-section shaped like the letter U.

[0013] Preferably, the front and rear ends of the arch block body are respectively provided with positioning pin grooves, the positioning pin is a steel component with tapered ends, the positioning pin groove matches the shape of the pin head of the positioning pin, and the positioning pin is arranged in two adjacent positioning pin grooves.

[0014] Preferably, longitudinally adjacent dome block bodies are connected via three positioning pins.

[0015] Preferably, two circles of hollow silicone strip grooves are arranged in a horizontal annular direction on the dome block body.

[0016] Preferably, the cross section of the hollow silicone strip is concave-moon-shaped, and the hollow silicone strip does not protrude from the hollow silicone strip groove.

[0017] Preferably, by injecting inert gas or inert slurry into the hollow silicone strip, the cross-section of the hollow silicone strip expands into a convex moon shape under the injection pressure, thereby forming a surface pressure at the joint that is sufficient to withstand the external water pressure to meet the needs of temporary water stopping.

[0018] Preferably, the hollow silicone strip is fixed in a hollow silicone strip groove reserved in the vault block body by means of chloroprene rubber.

[0019] The present invention has the following beneficial effects:

[0020] The arch-shaped shield tunnel section is an original shield tunnel section. The overall shape of the tunnel section is composed of two semicircles and a micro-arch on the top. The overall structural force is similar to the traditional circular section, with better internal force performance and strong applicability to stratum burial depth. At the same time, the setting of the arch block at the top groove makes the top of the shield shell present an arch structure, which effectively alleviates the problem of soil disturbance caused by the back-soil on the top of the shield shell and makes the cutterhead arrangement more reasonable. It combines the two most reasonable structural forms of underground structures, namely the arch and circular combined sections, and is called the arch-shaped shield tunnel section.

[0021] The present invention provides a circular shield arch block with a quick connection device and a three-dimensional waterproof system. Through the provision of the circular shield arch block, the soil arch effect of the shield shell, the back soil of the shield shell and the disturbance of the stratum are effectively improved, thereby reducing settlement. The quick connection device between the arch block and the pipe segment effectively prevents the dislocation and floating of the arch block, and its waterproof system satisfies the risk of water seeping into the shield shell at the joints between the arch block and the adjacent lining ring pipe segment during shield construction. The arch block body structure, quick connection device and three-dimensional waterproof system can be applied to water-rich strata and other strata, effectively reducing the impact of shield construction on the surrounding environment, and has a wide range of stratum applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the present invention.

[0023] Figure 1 This is a schematic elevation diagram of the position relationship of the arch crown blocks of the arched circular shield according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic elevation diagram of the arch block structure of the arched circular shield according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of a TU quick connector in an embodiment of the present invention;

[0026] Figure 4 It is a cross-sectional schematic diagram of a dome block structure 1-1 of an arched circular shield machine according to an embodiment of the present invention;

[0027] Figure 5 for Figure 2 A view of

[0028] Figure 6This is a state diagram of the hollow silicone strip before expansion in an embodiment of the present invention;

[0029] Figure 7 This is a diagram of the expanded state of the hollow silicone strip in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Arch block body; 2. Arch shield tunnel lining ring; 21. Lining ring segment block 1; 22. Lining ring segment block 2; 3. Hollow silicone strip; 4. Positioning pin groove; 5. Positioning pin; 6. Threaded anchor bar; 7. U-shaped groove component; 8. T-shaped protrusion component. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] This embodiment provides a shield arch block with a quick connection device and a three-dimensional waterproof system. Figures 1 to 7 As shown, it includes a vault block body 1, a quick connection device, and a three-dimensional waterproof system; the vault block body 1 is used to fill the groove at the top of the arch shield tunnel section, the quick connection device is used to achieve the connection between the vault block bodies 1 and between the vault block bodies 1 and the adjacent lining ring segments, and the three-dimensional waterproof system is used to achieve water stopping at the joints between the vault block bodies 1 and between the vault block bodies 1 and the outer skins of the adjacent lining ring segments.

[0034] The top of the vault block body 1 is in a single arch shape, and the bottom of the vault block body 1 is in a downward convex shape that matches the groove at the top of the arched shield tunnel lining ring 2; the vault block body 1 is arranged above the groove at the top of the arched shield tunnel lining ring 2, and the cross section of the arched shield tunnel lining ring 2 is in a horizontal "8" shape, and the top of the structural cross section composed of the vault block body 1 and the arched shield tunnel lining ring 2 is in a micro-arch shape. The combination of the arched shield tunnel lining ring 2 and the vault block body 1 realizes the basic characteristics of the arched shield cross section: the top of the tunnel cross section is in a single micro-arch shape, and the two sides and the bottom are in two semicircular shapes, thereby optimizing the overall cross-section of the shield machine into an arched circular shape to better adapt to the excavation in different strata. The setting of the vault block can effectively improve the soil arch effect at the top of the shield shell, reduce the disturbance of the shield shell to the stratum, and reduce settlement.

[0035] The quick connection device includes a TU quick connector and a positioning pin 5. The quick connection device is used to prevent the position of the vault block from being fixed after filling and to prevent it from floating. The lining ring segment blocks (lining ring segment block 1 21, lining ring segment block 2 22) adjacent to the vault block body 1 in the lining ring 2 of the arch shield tunnel are connected to the vault block body 1 through a TU quick connector. The TU quick connector includes a T-shaped protruding component 8 and a U-shaped groove component 7. One end of the T-shaped protruding component 8 is connected to a threaded anchor bar 6. The threaded anchor bar 6 connected to the T-shaped protruding component 8 is pre-buried in the lining ring segment block adjacent to the vault block body 1. A plurality of threaded anchor bars 6 are welded on the back of the U-shaped groove member 7, and the threaded anchor bars 6 connected to the U-shaped groove member 7 are pre-buried in the vault block body 1; the T-shaped protruding member 8 is connected to the U-shaped groove member 7; the T-shaped protruding member 8 is arranged in a point shape on the outer skin of the lining ring segment block (lining ring segment block 1 21, lining ring segment block 2 22) adjacent to the vault block body 1, and two T-shaped protruding members 8 are arranged longitudinally on the outer skin of the lining ring segment block 1 21 and the lining ring segment block 2 22 close to the vault block body 1; the U-shaped groove member 7 is arranged in a strip shape on the left and right sides of the vault block body 1. The T-shaped protruding member 8 is a steel member shaped like the letter T, and the U-shaped groove member 7 is a steel strip channel with a cross-section shaped like the letter U. The quick coupling device plays a longitudinal and vertical limiting role, effectively preventing the dislocation and floating of the vault block.

[0036] The longitudinally adjacent arch block bodies 1 are connected by locating pins 5, and the longitudinal limiting connection is realized by setting the longitudinal locating pins 5; the longitudinal front and rear ends of the arch block body 1 are respectively provided with locating pin grooves 4, and the locating pins 5 are steel components with tapered ends, and the locating pin grooves 4 match the pin head shape of the locating pins 5, and the locating pins 5 are arranged in two adjacent locating pin grooves 4 (the two adjacent locating pin grooves 4 are the locating pin grooves 4 arranged at the rear end of the front arch block body 1 and the locating pin grooves 4 arranged at the front end of the rear arch block body 1). The longitudinally adjacent arch block bodies 1 are connected by three locating pins 5. Before assembling the pipe segments, the rear part of the locating pin 5 is fixed in the locating pin groove 4 at the front end of the arch block body 1, and then the front part of the locating pin 5 is inserted into the locating pin groove 4 at the rear end of the assembled arch block body 1 along the longitudinal direction to realize the longitudinal limiting connection.

[0037] The three-dimensional waterproof system is to prevent water in the external soil from flowing into the shield body through the joint between the vault block and the cross section of the arched shield tunnel lining ring 2 during the shield excavation process. The three-dimensional waterproof system includes a hollow silicone strip 3, a hollow silicone strip groove is horizontally arranged on the vault block body 1, and the hollow silicone strip 3 is arranged in the hollow silicone strip groove in the annular direction. The hollow silicone strip 3 is arranged in the annular direction to block the water seepage path of the joint. The hollow silicone strip 3 is fixed in the hollow silicone strip groove reserved in the vault block body 1 by chloroprene rubber. Two circles of hollow silicone strip grooves are horizontally arranged on the vault block body 1. The cross section of the hollow silicone strip 3 is concave and the hollow silicone strip 3 does not protrude from the hollow silicone strip groove. By injecting inert gas or inert slurry into the hollow silicone strip 3, the cross section of the hollow silicone strip 3 expands into a convex moon shape under the action of the injection pressure, thereby forming a surface pressure sufficient to withstand the external water pressure at the joint to meet the temporary water stopping needs.

[0038] The cross section of the circular shield tunnel is generally divided into two semicircular lining rings and a vault block. The main load-bearing component is the circular shield tunnel lining ring 2 with a horizontal "8"-shaped cross section composed of two semicircles. The circular shield vault block is only used to fill the top groove of the circular shield tunnel lining ring 2 and does not participate in the load.

[0039] The vault block body 1 is a prefabricated structure, which is prefabricated in the factory using a customized steel mold. Considering its assembly requirements, the weight of the vault block body 1 should be reduced as much as possible. The vault block body 1 can be prefabricated using lightweight aggregate concrete or foam concrete. When the vault block body 1 is prefabricated, two circles of hollow silicone strip grooves need to be reserved at the corresponding positions of the vault block body 1, and the hollow silicone strip grooves are required to be arranged in a horizontal circumferential circle. When the vault block body 1 is prefabricated, it is necessary to reserve positioning pin grooves 4 at the corresponding positions of the vault block body 1, and three positioning pin grooves 4 are respectively arranged on the front and rear end faces to meet the longitudinal connection requirements of the vault block body 1. When the vault block body 1 is prefabricated, a U-shaped groove component 7 is arranged on each side of the vault block body 1, and a number of threaded anchor bars 6 connected to the back of the U-shaped groove component 7 are pre-buried in the vault block body 1.

[0040] Each lining ring segment block of the arch circular shield tunnel lining ring 2 is a prefabricated component. During the prefabrication of the lining ring segment blocks (lining ring segment block 1 21, lining ring segment block 2 2) adjacent to the arch crown block body 1 in the arch circular shield tunnel lining ring 2, T-shaped protruding components 8 should be embedded in the corresponding positions, and two T-shaped protruding components 8 cooperating with the U-shaped groove component 7 should be provided in the longitudinal direction of the lining ring segment block 1 and the lining ring segment block 2.

[0041] After the prefabricated production of the lining ring 2 of the arch shield tunnel and the arch block body 1 meets various technical requirements, they are transported to the site for installation. Before the installation of the arch block body 1, the hollow silicone strip 3 is embedded in the hollow silicone strip groove reserved in the arch block using a bonding material such as chloroprene rubber. Before inflation or slurry, the cross-section of the hollow silicone strip 3 is "concave moon-shaped" and does not protrude from the hollow silicone strip groove, so as to protect the hollow silicone strip 3 from damage when the segment is inserted longitudinally.

[0042] Before installing the vault block body 1, the locating pin 5 is fixed in the locating pin groove 4 on the front face, and then the locating pin 5 at the front of the assembled vault block body 1 is inserted longitudinally into the locating pin groove 4 at the rear end of the assembled vault block body 1. At the same time, the U-shaped groove component 7 of the vault block body 1 is longitudinally sleeved on the T-shaped protruding component 8 on the lining ring segment block 1 21 and the lining ring segment block 2 22, thereby realizing the ring and longitudinal quick connection to meet the limit fixation of the vault block.

[0043] After the vault block is installed and connected and fixed, and before the pipe segment is pushed out of the shield tail, an inert gas or inert slurry is injected into the hollow silicone strip 3 in the shield shell, so that the hollow silicone strip 3 expands to form a "convex moon shape" under the action of the injection pressure. The expanded hollow silicone strip forms a surface pressure at the joint that is sufficient to withstand the external water pressure, so as to meet the temporary water stopping needs.

[0044] The partial changes in the form and details of the present invention for the main structure of the arch block of the arch shield tunnel section, the quick connection device and the three-dimensional waterproof system do not deviate from the scope defined by the claims of the present invention. Not limited to the examples cited in this patent, similar structural forms, connections and waterproofing methods based on the concept of this patent are all within the scope of the rights of this patent.

[0045] The above embodiments of the present invention are described in detail through examples, but the contents described are only exemplary embodiments of the embodiments of the present invention and cannot be considered to limit the scope of implementation of the embodiments of the present invention. The protection scope of the embodiments of the present invention is defined by the claims. Anyone who utilizes the technical solutions described in the embodiments of the present invention, or who, inspired by the technical solutions of the embodiments of the present invention, designs similar technical solutions within the essence and protection scope of the embodiments of the present invention to achieve the above technical effects, or who makes equal changes and improvements to the scope of application, shall still fall within the scope of protection covered by the patent of the embodiments of the present invention.

Claims

1. An arch shield vault block with both a quick connection device and a three-dimensional waterproof system, characterized in that: It comprises a vault block body (1), a quick connection device, and a three-dimensional waterproof system; The cross section of the arched shield tunnel lining ring is in a transverse "8" shape, the top of the arch block body (1) is in a single arch shape, and the bottom of the arch block body (1) is in a downward convex shape that matches the top groove of the arched shield tunnel lining ring (2); the arch block body (1) is arranged above the top groove of the arched shield tunnel lining ring (2); The quick connection device comprises a TU quick joint and a positioning pin (5); the lining ring segment block adjacent to the vault block body (1) in the arch shield tunnel lining ring (2) is connected to the vault block body (1) via the TU quick joint; the TU quick joint comprises a T-shaped protruding component (8) and a U-shaped groove component (7); one end of the T-shaped protruding component (8) is connected to a threaded anchor bar (6), and the threaded anchor bar (6) connected to the T-shaped protruding component (8) is pre-buried in the lining ring segment block adjacent to the vault block body (1); the back of the U-shaped groove component (7) is connected to a plurality of threaded anchor bars (6), and the threaded anchor bars (6) connected to the U-shaped groove component (7) are pre-buried in the vault block body (1); the T-shaped protruding component (8) is connected to the U-shaped groove component (7); and the vault block bodies (1) adjacent to each other in the longitudinal direction are connected via the positioning pin (5); The three-dimensional waterproof system comprises a hollow silicone strip (3), a hollow silicone strip groove is horizontally annularly arranged on the upper edge of the dome block body (1), and the hollow silicone strip (3) is annularly arranged in the hollow silicone strip groove.

2. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 1, characterized in that: The T-shaped protruding components (8) are arranged in a dot-like manner on the outer skin of the lining ring segment blocks adjacent to the vault block body (1) in the lining ring (2) of the arch shield tunnel; and the U-shaped groove components (7) are arranged in a strip-like manner on the left and right sides of the vault block body (1).

3. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 2, characterized in that: In the lining ring (2) of the arch shield tunnel, the lining ring segment block adjacent to the arch block body (1) is provided with two T-shaped protruding components (8) along the longitudinal direction on the outer skin of one side close to the arch block body (1).

4. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 1, characterized in that: The T-shaped protruding component (8) is a steel component shaped like the letter T, and the U-shaped groove component (7) is a steel strip-shaped groove with a cross-section shaped like the letter U.

5. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 1, characterized in that: The arch block body (1) is provided with positioning pin grooves (4) at the longitudinal front and rear ends respectively. The positioning pin (5) is a steel component with conical ends. The positioning pin groove (4) matches the shape of the pin head of the positioning pin (5). The positioning pin (5) is arranged in two adjacent positioning pin grooves (4).

6. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 5, characterized in that: The longitudinally adjacent dome block bodies (1) are connected via three positioning pins (5).

7. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 1, characterized in that: The dome block body (1) is provided with two circles of hollow silicone strip grooves in a horizontal annular direction.

8. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 1, characterized in that: The cross section of the hollow silicone strip (3) is in a concave moon shape, and the hollow silicone strip (3) does not protrude from the hollow silicone strip groove.

9. The arched shield vault block with both a quick connection device and a three-dimensional waterproof system according to claim 1, characterized in that: The hollow silicone strip (3) is fixed in a hollow silicone strip groove reserved in the dome block body (1) by means of chloroprene rubber.

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