Multi-waterproof duct piece structure of shield tunnel

Abstract

The utility model discloses a multi-channel waterproof duct piece structure of a shield tunnel, which comprises a plurality of concrete duct piece layers, and each concrete duct piece layer comprises a top sealing block, a standard block I, a standard block II, a bottom block, a standard block III and a standard block IV which are sequentially and detachably connected to form a circular tunnel along the clockwise direction, waterproof structures are arranged at the connecting positions of the top sealing block, the bottom block, the first standard block, the second standard block, the bottom block, the third standard block and the fourth standard block, and the multiple concrete pipe pieces are connected in a staggered joint mode. The waterproof structure is arranged among the top sealing block, the first standard block, the second standard block, the bottom block, the third standard block and the fourth standard block, the waterproof strength of the single-layer concrete pipe piece layer is improved, the different concrete pipe piece layers are arranged in a staggered joint mode, the waterproof effect is improved, and meanwhile the stability of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction equipment, in particular to a multi-channel waterproof pipe segment structure for a shield tunnel. Background Art

[0002] The shield tunnel construction method refers to the use of a shield machine to control the excavation face and the surrounding soil from collapsing and becoming unstable, while excavating the tunnel, discharging slag, assembling segments in the machine to form a lining, and implementing back-wall grouting, so as to build a tunnel without disturbing the surrounding soil. The so-called "shield" of the shield machine refers to the cutterhead and pressure chamber that maintain the stability of the excavation face, and the shield steel shell that supports the surrounding soil, and the so-called "structure" refers to the segments that constitute the tunnel lining and the back-wall grouting.

[0003] The shield segment is the main assembly component of the shield construction, which supports the surrounding soil pressure, groundwater pressure and some special loads, and plays the role of sealing and waterproofing. The shield segment is the permanent lining structure of the shield tunnel. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel.

[0004] Traditional shield segments are manufactured using the cast-in-place method. After the shield segments are installed, many problems may arise, such as misalignment, dislocation, floating, uneven inner arc, and misaligned joints. This results in the tunnel structure being not tight and compact enough, leaving gaps between adjacent shield segments, posing a risk of water seepage, and having poor waterproofing performance.

[0005] In order to optimize the processing technology and connection method of the segments, improve the construction efficiency of shield tunnels, and ensure the safety and durability of tunnel linings, it is necessary to seek a new type of concrete segment structure that can avoid joint damage caused by stress concentration and increase the joint's ability to resist water pressure. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a multi-channel waterproof segment structure of a shield tunnel which meets the requirements of safe use and long-term operation of the shield tunnel and improves the waterproof effect of the segment tunnel.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a multi-channel waterproof segment structure of a shield tunnel, comprising a plurality of concrete segment layers, each of the concrete segment layers comprising a capping block, a standard block one, a standard block two, a bottom block, a standard block three and a standard block four which are detachably connected in a clockwise direction to form a circular tunnel, and waterproof structures are arranged at the connecting positions between the capping block, the bottom block, the standard block one, the standard block two, the bottom block, the standard block three and the standard block four, and the plurality of concrete segment layers are connected with staggered seams.

[0008] Furthermore, step blocks are respectively arranged on the left and right sides of the capping block, the bottom block, the standard block one, the standard block two, the bottom block, the standard block three and the standard block four, and the two step blocks of the capping block and the bottom block are axially symmetrical, the two step blocks of the standard block one, the standard block two, the bottom block and the standard block three are centrally symmetrical, and two adjacent step blocks can be detachably spliced ​​with each other.

[0009] Furthermore, the connection surface of the step block includes two straight portions perpendicular to the end portions and an S-shaped curved portion arranged between the two straight portions, and the step block is also provided with a first sponge rubber strip at a position corresponding to the curved portion.

[0010] Furthermore, a waterproofing groove is provided in the middle of the step block corresponding to the curved portion, and the first sponge rubber strips are respectively arranged on both sides of the waterproofing groove corresponding to the step block.

[0011] Furthermore, the waterproof measure groove includes a first groove and two second grooves respectively connected to both sides of the first groove, and the groove depth of the first groove is greater than the groove depth of the second groove.

[0012] Furthermore, the front and rear sides of the capping block, the bottom block, the standard block one, the standard block two, the bottom block, the standard block three and the standard block four are respectively provided with first convex strips and first groove bodies that can match and plug into each other, and the groove walls of the first convex strips and the first groove bodies are both provided with second sponge rubber strips, and the first convex strips and the first groove bodies of the capping block, the bottom block, the standard block one, the standard block two, the bottom block, the standard block three and the standard block four can be connected to each other in a ring shape.

[0013] Furthermore, the front and rear sides of the capping block, the bottom block, the standard block one, the standard block two, the bottom block, the standard block three and the standard block four are respectively provided with a second convex strip and a second groove body that can be matched and plugged into each other, and the length of the second convex strip is smaller than the first convex strip, and the center line connecting the second groove body and the first groove body does not pass through the center of the concrete pipe layer.

[0014] The beneficial effects of the utility model are embodied in:

[0015] The multi-channel waterproof segment structure of the shield tunnel of the utility model improves the waterproof strength of the single-layer concrete segment layer by arranging waterproof structures between the capping block, standard block one, standard block two, bottom block, standard block three and standard block four, and increases the waterproof effect while increasing the stability of the structure by staggering the different concrete segment layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the concrete pipe sheet structure of the utility model;

[0017] Figure 2 This is a rear view of the concrete pipe sheet structure of the utility model;

[0018] Figure 3 It is a side view of the multi-channel waterproof segment structure of the shield tunnel of the utility model;

[0019] Figure 4 It is a cross-sectional view of the step block structure of the utility model;

[0020] Figure 5 It is a side sectional view of the connection structure of adjacent concrete pipe slices of the utility model.

[0021] The components in the accompanying drawings are marked as follows: 1. Capping block; 2. Standard block one; 3. Standard block two; 4. Bottom block; 5. Standard block three; 6. Standard block four; 7. Step block; 701. Straight portion; 702. Curved portion; 703. Waterproof measure groove; 7031. First groove; 7032. Second groove; 8. First sponge rubber strip; 9. First convex strip; 10. First groove body; 101. Third groove; 11. Second sponge rubber strip; 12. Second convex strip; 13. Second groove body; A. Concrete pipe segment layer. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 and Figure 3 .

[0024] The utility model discloses a multi-channel waterproof segment structure of a shield tunnel, comprising a plurality of concrete segment layers A, each of which comprises a capping block 1, a standard block 1 2, a standard block 2 3, a bottom block 4, a standard block 3 5 and a standard block 4 6 which are detachably connected in a clockwise direction to form a circular tunnel, and waterproof structures are arranged at the connecting positions between the capping block 1, the bottom block 4, the standard block 1 2, the standard block 2 3, the bottom block 4, the standard block 3 5 and the standard block 4 6, and the plurality of concrete segment layers A are connected with staggered seams.

[0025] The multi-channel waterproof pipe segment structure of the shield tunnel of the utility model improves the waterproof strength of the single-layer concrete pipe segment layer A by arranging waterproof structures between the capping block 1, the standard block 1 2, the standard block 2 3, the bottom block 4, the standard block 3 5 and the standard block 4 6, and increases the waterproof effect while increasing the stability of the structure by staggering the different concrete pipe segment layers A.

[0026] In one embodiment, see Figure 2 and Figure 4 , the left and right sides of the capping block 1, the bottom block 4, the standard block 1 2, the standard block 2 3, the bottom block 4, the standard block 3 5 and the standard block 4 6 are respectively provided with step blocks 7, and the two step blocks 7 of the capping block 1 and the bottom block 4 are axially symmetrical, the two step blocks 7 of the standard block 1 2, the standard block 2 3, the bottom block 4 and the standard block 3 5 are centrally symmetrical, and the two adjacent step blocks 7 can be detachably spliced ​​with each other. With this design, a detachable connection is achieved through the splicing between the step blocks 7, and the connection structure is simple and easy to implement, replacing the original segment structure assembled with fastening bolts, and the step blocks 7 can also extend the splicing path to enhance the waterproof effect.

[0027] In one embodiment, see Figure 4 The connection surface of the step block 7 includes two straight portions 701 perpendicular to the ends and an S-shaped curved portion 702 disposed between the two straight portions 701, and the step block 7 is further provided with a first sponge rubber strip 8 at the position corresponding to the curved portion 702. In this design, waterproofing is achieved through the first sponge rubber strip 8, and the installation of the capping block 1 can be facilitated by providing the curved portion 702.

[0028] In one embodiment, see Figure 4 The step block 7 is also provided with a waterproof measure groove 703 in the middle of the curved portion 702, and the first sponge rubber strips 8 are respectively provided on both sides of the step block 7 corresponding to the waterproof measure groove 703. In this design, by providing a waterproof structure in the waterproof measure groove 703, the waterproof effect is further enhanced, and the combination with the first sponge rubber strip 8 forms three waterproof areas, and in this embodiment, the waterproof structure provided in the waterproof measure groove 703 is filled with waterproof material.

[0029] In one embodiment, see Figure 4The waterproof measure groove 703 includes a first groove 7031 and two second grooves 7032 respectively connected to both sides of the first groove 7031, and the groove depth of the first groove 7031 is greater than the groove depth of the second groove 7032. In this embodiment, a trapezoidal waterproof material larger than the volume of the first groove 7031 is first placed in the first groove 7031 (the "trapezoidal waterproof material" can be directly obtained through existing technology, specifically a trapezoidal rubber waterstop strip can be used). With this design, when arranging the capping block 1, standard block one 2, standard block two 3, bottom block 4, standard block three 5 and standard block four 6, the waterproof materials will squeeze each other and expand to the second grooves 7032 on both sides. The dense accumulation of waterproof materials can achieve a better waterproof effect. In addition, when external moisture penetrates from the gaps in the pipe segments, the moisture is mostly concentrated around the first groove 7031. At this time, the S-shaped curve portion 702 makes the waterproof measure groove 703 form a concave surface to prevent further development of moisture. At the same time, in conjunction with the first groove 7031 to place the trapezoidal waterproof material, the curved portion 702 connecting surface of the step block 7 can also avoid the difficulty of arranging the pipe segments tightly due to the addition of waterproof material in advance.

[0030] In one embodiment, see Figure 5 The front and rear sides of the capping block 1, the bottom block 4, the standard block 1, the standard block 2, the standard block 2, the bottom block 4, the standard block 3, the standard block 4, the standard block 3, and the standard block 4 are respectively provided with a first convex strip 9 and a first groove body 10 that can be matched and plugged into each other, and the groove walls of the first convex strip 9 and the first groove body 10 are provided with a second sponge rubber strip 11, and the first convex strip 9 and the first groove body 10 of the capping block 1, the bottom block 4, the standard block 1, the standard block 2, the standard block 3, the bottom block 4, the standard block 3, the standard block 5, and the standard block 4 are connected to each other in a ring shape. In this way, the design realizes the detachable connection and waterproofing between different concrete pipe layer A through the plug-in cooperation of the first convex strip 9 and the first groove body 10. In this embodiment, the insertion end of the first convex strip 9 can be set to a hemispherical shape, and in this embodiment, the inner sides of two adjacent standard blocks 1 2, standard block 2 3, bottom block 4, standard block 3 5 and standard block 4 6 are also respectively provided with third grooves 101 that can be interconnected, and sponge rubber strips can be filled in two adjacent third grooves 101 for waterproofing.

[0031] In one embodiment, see Figure 1 , 2, 5, the front and rear sides of the capping block 1, the bottom block 4, the standard block 1 2, the standard block 2 3, the bottom block 4, the standard block 3 5 and the standard block 4 6 are also respectively provided with second convex strips 12 and second groove bodies 13 that can be matched and plugged in with each other, and the length of the second convex strips 12 is less than the first convex strips 9, and the center line connecting the second groove body 13 and the first groove body 10 does not pass through the center of the concrete pipe layer A. This design enables different concrete pipe layers A to be pre-positioned during the splicing process through the plug-in cooperation of the second convex strips 12 and the second groove body 13, which facilitates the connection of different concrete pipe layers A, and in this embodiment, the second convex strips 12 and the second groove body 13 are located on the inner side of the first convex strips 9 and the first groove body 10.

[0032] In one embodiment, see Figure 3 The central angle corresponding to the arc of the capping block is α, the central angles corresponding to the arcs of the standard block 1 2, the standard block 2 3, the standard block 4 6, and the standard block 3 5 are all β, and the central angle corresponding to the arc of the bottom block 4 is γ, and its value should conform to the following relationship: α+4β+γ=360°.

[0033] It should be noted that the utility model is a support structure for a tunnel. When the tunnel is constructed using a shield or TBM method, the subsequent lining can adopt a segment structure, which is prefabricated in advance outside the tunnel and assembled inside the tunnel. It is an assembled lining structure and is assisted by corresponding waterproof measures to support the tunnel in one step.

[0034] The segments are prefabricated in factories and produced in a molded assembly line. After curing and forming, they are transported to the tunnel site for assembly. The segments are reinforced concrete structures, and can also be steel fiber concrete segments, steel segments, cast iron segments, and composite segments. Before the segments are assembled in the tunnel, multiple waterproof measures are installed on the ground in advance. After the segments are assembled in the tunnel, the waterproof measures are squeezed at the joints to achieve waterproofing, forming the final segment support and waterproofing system to meet the requirements of tunnel structure safety and long-term operation and use.

[0035] The tunnel segment structure used in a specific project can be adapted to local conditions. Its relevant parameters such as: segment lining geometry, segment lining block type, segment reserved groove type and position, waterproof gasket geometry, material, can all be determined according to actual project needs, large or small, long or short.

[0036] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] It should be understood that the examples and implementation modes described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on the examples and implementation modes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-channel waterproof segment structure for a shield tunnel, characterized in that: The invention comprises a plurality of concrete pipe segment layers (A), each of which comprises a capping block (1), a standard block one (2), a standard block two (3), a bottom block (4), a standard block three (5) and a standard block four (6) which are detachably connected in a clockwise direction to form a circular tunnel, and a waterproof structure is arranged at the connection positions between the capping block (1), the standard block one (2), the standard block two (3), the bottom block (4), the standard block three (5) and the standard block four (6), and the plurality of concrete pipe segment layers (A) are connected with staggered joints; Step blocks (7) are respectively arranged on the left and right sides of the capping block (1), the standard block one (2), the standard block two (3), the bottom block (4), the standard block three (5) and the standard block four (6), and the two step blocks (7) of the capping block (1) and the bottom block (4) are axially symmetrical, and the two step blocks (7) of the standard block one (2), the standard block two (3), the bottom block (4) and the standard block three (5) are centrally symmetrical, and two adjacent step blocks (7) can be detachably spliced ​​with each other; The connection surface of the step block (7) comprises two straight portions (701) perpendicular to the end portions and an S-shaped curved portion (702) arranged between the two straight portions (701), and a first sponge rubber strip (8) is also arranged at the position of the step block (7) corresponding to the curved portion (702); A waterproofing groove (703) is also provided in the middle of the step block (7) corresponding to the curved portion (702), and the first sponge rubber strip (8) is respectively arranged on both sides of the step block (7) corresponding to the waterproofing groove (703).

2. The multi-channel waterproof segment structure of a shield tunnel according to claim 1, characterized in that: The waterproof measure groove (703) includes a first groove (7031) and two second grooves (7032) respectively connected to both sides of the first groove (7031), and the groove depth of the first groove (7031) is greater than the groove depth of the second groove (7032).

3. The multi-channel waterproof segment structure of a shield tunnel according to claim 1, characterized in that: The front and rear sides of the capping block (1), the standard block one (2), the standard block two (3), the bottom block (4), the standard block three (5) and the standard block four (6) are respectively provided with first convex strips (9) and first concave grooves (10) which can be matched and plugged into each other, and the groove walls of the first convex strips (9) and the first concave grooves (10) are both provided with second sponge rubber strips (11), and the first convex strips (9) and the first concave grooves (10) of the capping block (1), the standard block one (2), the standard block two (3), the bottom block (4), the standard block three (5) and the standard block four (6) can be connected to each other in a ring shape.

4. The multi-channel waterproof segment structure of a shield tunnel according to claim 3, characterized in that: The front and rear sides of the capping block (1), the standard block one (2), the standard block two (3), the bottom block (4), the standard block three (5) and the standard block four (6) are also respectively provided with a second convex strip (12) and a second concave groove body (13) which can be matched and plugged into each other, and the length of the second convex strip (12) is smaller than that of the first convex strip (9), and the center line connecting the second concave groove body (13) and the first concave groove body (10) does not pass through the center of the concrete pipe layer (A).

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