Flow guide structure of tunnel bottom plate expansion joint

Abstract

The utility model relates to a diversion structure of a tunnel bottom plate expansion joint, which comprises a diversion trench, and the diversion trench comprises an upper half part and a lower half part which are separated from each other; the upper half part and the lower half part are strip-shaped, and the length of the upper half part and the length of the lower half part are equal to that of the tunnel bottom plate expansion joint The upper half part covers the top of the tunnel bottom plate expansion joint in the length direction of the tunnel bottom plate expansion joint; the lower half part is arranged in the tunnel bottom plate expansion joint in a sealed mode in the telescopic length direction of the tunnel bottom plate. A space is formed between the upper half part and the lower half part, and the upper half part and the lower half part are jointly guided to a tunnel bottom plate side ditch; and the butter cavity structure is a semi-enclosed structure with an open bottom plate, covers the upper part of the upper half part, and is filled with butter, so that the upper half part is wrapped by the butter. According to the utility model, seepage water in the tunnel bottom plate can be effectively prevented from flowing to the pavement expansion joint, the problem of water damage at the expansion joint in the current tunnel vehicle driving process is solved, and the service life of the expansion joint is prolonged.

Description

Technical Field

[0001] The utility model relates to a tunnel building structure, in particular to a structure for expansion joints applied to tunnel floor slabs, specifically a diversion structure for expansion joints of tunnel floor slabs. Background Art

[0002] Currently, whether it is an open-cut tunnel or a mined tunnel, expansion joints are set to prevent structural settlement due to factors such as formation geology during the later use of the tunnel. The surfaces of the expansion joints generally adopt comb-shaped, S-shaped, F-shaped, etc. Generally, both sides are filled with steel fiber or glass fiber C50 concrete and are connected to the asphalt concrete of the ground structure layer. However, no treatment is generally done to the expansion joints of the floor slab structure and the expansion joints of the road surface structure layer, and a gap of 3 - 4 cm is left. With the opening of the tunnel to traffic, structural leakage often occurs in the tunnel floor slab. The seepage water enters the expansion joint through the expansion joint of the floor slab structure and then gradually seeps out, resulting in water damage to the asphalt concrete of the road surface structure, affecting the service life of the expansion joint, and reducing the driving comfort.

[0003] Therefore, it is urgently needed to be improved to improve the quality of tunnel construction. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a diversion structure for expansion joints of tunnel floor slabs aiming at the problems encountered in current tunnel construction, which can effectively lead out the seepage water in the tunnel, avoid flowing into the expansion joints of the tunnel floor slab and the expansion joints of the road surface, prevent water damage to the asphalt concrete of the road surface structure, and extend the service life of the expansion joints.

[0005] The technical solution of the utility model is as follows:

[0006] A diversion structure for expansion joints of tunnel floor slabs includes a diversion groove, and the diversion groove includes a separated upper half and a lower half; both the upper half and the lower half are strip-shaped, and their lengths are equivalent to the length of the expansion joint of the tunnel floor slab; the upper half covers the top of the expansion joint of the tunnel floor slab along the length direction of the expansion joint of the tunnel floor slab; the lower half is hermetically arranged in the expansion joint of the tunnel floor along the length direction of the expansion of the tunnel floor; there is a space between the upper half and the lower half, and they jointly guide to the side ditch of the tunnel floor; it also includes a butter cavity structure, which is a semi-surrounding structure open at the bottom and covers above the upper half, and its interior is filled with butter so that the upper half is wrapped by the butter.

[0007] Further, the cross-sections of both the upper half and the lower half are elliptical arcs, and the openings are opposite.

[0008] Further, the butter cavity structure includes a left plate and a right plate; the cross-sections of the left plate and the right plate are both "Z" - shaped, and they are respectively arranged on the tunnel floor on both sides of the expansion joint of the tunnel floor. Their openings face each other, and their top edges overlap each other with a gap, so that a buffer cavity is formed between the top edges; the outside of the butter cavity is connected to the filling layer.

[0009] Further, it also includes an oil delivery pipe, the lower end of which communicates with the buffer cavity, and the upper end of which is located at the road surface expansion joint and is provided with a cover.

[0010] Further, multiple oil delivery pipes are provided and are evenly spaced.

[0011] Further, it also includes embedded steel plates, which are strip-shaped, and the length thereof is equivalent to the length of the expansion joint of the tunnel floor. They are respectively arranged on the tunnel floor on both sides of the expansion joint of the tunnel floor along the length direction of the expansion joint of the tunnel floor; the left plate and the right plate are respectively fixed on the embedded steel plates.

[0012] Further, it also includes anchor bars, which are L - shaped and are arranged in the tunnel floor. The upper ends thereof are connected to the embedded steel plates to ensure the reliable anchoring of the embedded steel plates.

[0013] Further, the expansion joint of the tunnel floor below the lower part is filled with sealant.

[0014] The beneficial effects of the present utility model:

[0015] The present utility model is reasonably designed, has a simple structure and is convenient for construction. By arranging a diversion groove in the expansion joint of the tunnel floor, the seepage water in the tunnel floor can be effectively drained in time to prevent it from flowing into the expansion joint of the tunnel floor. At the same time, by arranging the butter cavity structure, not only can the upper part of the diversion groove be effectively sealed to prevent seepage water from penetrating into the road surface expansion joint, improving the driving comfort of road vehicles, but also the influence of the passing of road vehicles on the diversion groove can be avoided, ensuring the normal operation of the diversion, creating favorable conditions for improving the quality of tunnel construction. Description of the Drawings

[0016] Figure 1 is the structural schematic diagram of the present utility model.

[0017] Figure 2 is Figure 1 the enlarged schematic diagram at I in

[0018] Wherein, 1 - filling layer; 2 - road surface expansion joint; 3 - butter cavity structure; 31 - right plate; 32 - left plate; 33 - buffer cavity; 4 - cover; 5 - oil delivery pipe; 6 - butter; 7 - diversion groove; 71 - upper part; 72 - lower part; 8 - sealant; 9 - embedded steel plate; 10 - anchor bar; 11 - tunnel floor. Detailed implementation mode

[0019] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments.

[0020] As Figure 1 and 2 shown.

[0021] A diversion structure for the expansion joint of a tunnel floor slab includes a diversion groove 7, a butter cavity structure 3, an oil pipeline 5, etc. There is an expansion joint of the tunnel floor slab on the tunnel floor slab 11. There is a filling layer 1 between the tunnel floor slab 11 and the tunnel pavement. The filling layer 1 is made of C50 high-strength steel fiber concrete. There is a pavement expansion joint 2 corresponding to the expansion joint of the tunnel floor slab on the tunnel pavement. The pavement expansion joint 2 is in a comb shape or an F shape.

[0022] The diversion groove 7 includes a separated upper half 71 and a lower half 72. Both the upper half 71 and the lower half 72 are strip-shaped, and their lengths are equivalent to the length of the expansion joint of the tunnel floor slab. Their cross-sections are both elliptical arcs, and their opening widths are equivalent to the width of the expansion joint of the tunnel floor slab, and the openings are opposite.

[0023] The upper half 71 is arranged along the length direction of the expansion joint of the tunnel floor slab at the top of the expansion joint of the tunnel floor slab and covers the expansion joint of the tunnel floor slab. The lower half 72 is hermetically arranged in the expansion joint of the tunnel floor slab along the length direction of the expansion joint of the tunnel floor slab, and sealant 8 is filled below the lower half 72 to ensure the stable installation of the lower half.

[0024] The upper half and the lower half are arranged at a distance, and the distance is about 6 cm, and they jointly lead to the side ditch of the tunnel floor slab, so as to divert the seepage water in the tunnel floor slab to the side ditch through the diversion groove.

[0025] Embedded steel plates 9 are provided on the tunnel floor slab. The embedded steel plates 9 are strip-shaped, and their lengths are equivalent to the length of the expansion joint of the tunnel floor slab. Their thickness is about 1.5 / 2 cm, and their width is about 50 cm. They are respectively arranged on the tunnel floor slab 11 on both sides of the expansion joint of the tunnel floor slab, and anchor bars 10 are provided at the bottom of the embedded steel plates 9. The anchor bars 10 are L-shaped steel bars, and their diameters are about 25 mm. They are vertically arranged in the tunnel floor slab 11, and their upper ends are connected to the embedded steel plates 9. Preferably, the anchor bar lengths of the anchor bars 10 are not less than 1 / 2 of the thickness of the tunnel floor slab 11, and they are arranged at intervals of 30 cm along the length of the expansion joint of the tunnel floor slab, and the embedded steel plates are flush with the structural surface of the tunnel floor slab to ensure reliable anchoring.

[0026] The butter chamber structure 3 includes a left plate 32 and a right plate 31. The cross-sections of the left plate 32 and the right plate 31 are both right-angled "Z" shapes, with the lengths of the top and bottom sides and the height being approximately 5 cm. They are welded to the embedded steel plate by full welding respectively, and the weld seam is not less than 8 mm to ensure the firm installation of the left and right plates. The openings of the left plate 32 and the right plate 31 face each other, and their top sides overlap with a gap to form a buffer chamber 33. The internal height of the buffer chamber 33 is 0.5 - 1 cm, and the end of the top side at the lower part is about 5 cm away from the corresponding inner wall, so that the buffer chamber 33 communicates with the space below it. Thus, the butter chamber structure becomes a semi-surrounding structure with an open bottom and has a certain elasticity. At the same time, the butter chamber structure 3 covers the upper half 71 of the diversion groove, and its outer side is connected to the filling layer 1, making the butter chamber structure relatively enclosed. Inside it, including the buffer chamber 33, is filled with butter 6, so that the upper half 71 of the diversion groove is wrapped by the butter 6 to block the seepage water rising from the tunnel floor. At the same time, the buffer chamber 33 can also reduce the impact brought by the vehicles driving on the tunnel road surface, avoiding the influence on the butter inside the butter chamber structure.

[0027] The oil delivery pipe 6 is in a straight tubular shape, made of galvanized pipe, with a diameter of approximately 2 cm. It is arranged above the diversion groove 7, its lower end communicates with the buffer chamber 33, its upper end is located at the road surface expansion joint 2, and is provided with a closable cover 4 to close the upper port. The oil delivery pipe 6 is filled with butter, and the cover 4 can be opened when needed to pour butter into the oil delivery pipe to ensure it is full. Thus, it can automatically supplement the butter in the butter chamber when the butter in the butter chamber decreases. There are multiple oil delivery pipes 6, evenly spaced with a spacing of approximately 3 m to meet the usage requirements. At the same time, the gap between the oil delivery pipe 6 and the filling layer 1 is filled with sealant to ensure the stability of the oil delivery pipe.

[0028] The utility model effectively prevents the seepage water in the tunnel floor from flowing to the road surface expansion joint by setting the diversion groove and the butter plugging method. Thus, it solves the water damage problem at the expansion joint during the current tunnel vehicle driving, extends the service life of the expansion joint, and improves the tunnel construction quality.

[0029] Parts not involved in the utility model are the same as the prior art or can be implemented by the prior art.

Claims

1. A diversion structure for a tunnel floor expansion joint, comprising a diversion groove, characterized in that: The guide groove comprises an upper half and a lower half separated from each other; the upper half and the lower half are both in the shape of long strips, and their lengths are equivalent to the length of the tunnel floor expansion joint; The upper part covers the top of the tunnel floor expansion joint along the length direction of the tunnel floor expansion joint; The lower half is sealed and arranged in the expansion joint of the tunnel floor along the length direction of the tunnel floor expansion; The upper and lower halves are separated by air and directed to the tunnel floor ditch together; the upper and lower halves also include a butter cavity structure, which is a semi-enclosed structure with an open floor, covering the upper half and filled with butter, so that the upper half is wrapped by the butter.

2. The flow guide structure of the tunnel floor expansion joint according to claim 1 is characterized in that: The cross sections of the upper half and the lower half are both elliptical arc-shaped, and the openings are opposite to each other.

3. The flow guide structure of the tunnel floor expansion joint according to claim 1 is characterized in that: The butter cavity structure includes a left side plate and a right side plate; the cross-sections of the left side plate and the right side plate are both "Z"-shaped, and are respectively arranged on the tunnel floor on both sides of the tunnel floor expansion joint, with their openings facing each other, and their top edges overlapping and spaced apart, so that a buffer cavity is formed between the top edges; the outer side of the butter cavity is connected to the filling layer.

4. The flow guide structure of the tunnel floor expansion joint according to claim 3 is characterized in that: It also includes an oil delivery pipe, the lower end of which is connected with the buffer cavity, and the upper end of which is located at the expansion joint of the road surface and is provided with a sealing cover.

5. The flow guide structure of the tunnel floor expansion joint according to claim 4 is characterized in that: The oil pipelines are multiple and are evenly spaced.

6. The flow guide structure of the tunnel floor expansion joint according to claim 3 is characterized in that: It also includes embedded steel plates, which are long strips and have a length comparable to that of the tunnel floor expansion joint. They are arranged on the tunnel floor on both sides of the tunnel floor expansion joint along the length direction of the tunnel floor expansion joint; the left side plate and the right side plate are fixed on the embedded steel plates respectively.

7. The flow guide structure of the tunnel floor expansion joint according to claim 6 is characterized in that: It also includes an L-shaped anchor bar, which is arranged in the tunnel floor and has an upper end connected to the embedded steel plate to ensure that the embedded steel plate is reliably anchored.

8. The flow guide structure of the tunnel floor expansion joint according to claim 1 is characterized in that: The expansion joint of the tunnel floor below the lower half is filled with sealant.

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