Tunnel inverted arch part structure adopting prefabricated ditch

Abstract

The utility model relates to the technical field of civil engineering, in particular to a tunnel inverted arch part structure adopting prefabricated ditches, which comprises a central ditch and side ditches, the central ditch and the side ditches are prefabricated parts, leveling mortar is arranged at the bottom of the central ditch, the side ditches are arranged on the sides of the central ditch, and the side ditches are in limited connection with tunnel segments through positioning anchor bolts. The central ditch is communicated with the side ditches through drainage pipes, and concrete is backfilled and poured at the inverted arch part of the tunnel segment between the central ditch and the side ditches. The utility model has the advantages that the groove adopts a high-precision prefabricated part, the quality of a single part is controllable, and the groove is connected by bolts on site without binding reinforcing steel bars and erecting templates, so that the labor and the working hours are saved, and the construction efficiency can be greatly improved; a rubber gasket water stop strip is adopted at the joint of the groove, so that the anti-seepage performance is excellent; the grooves are prefabricated, the tongue-and-groove positions of the grooves are high in flatness, after a covering plate is arranged on the grooves, the covering plate is flat, straight and free of shaking, and when the side ditch top serves as an evacuation or overhaul channel, the comfort degree and the safety degree are higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering technical field, concretely relates to a tunnel inverted arch part structure of prefabricated water ditch, mainly applies to various tunnel engineering, especially applicable to the tunnel ditch seepage water has higher requirement in the tunnel. BACKGROUND

[0002] At present, when the mine method construction of domestic highway tunnel and railway tunnel, the water ditch and cable groove of inverted arch part usually adopt the cast-in-place mode construction, need to bind the steel bar in the tunnel, erect the formwork, due to the arc structure characteristics of the lower part of the tunnel, bring certain difficulty to the fixation of the steel bar and formwork, worry about the formwork running and make the vibration not dense, further cause the ditch not straight, the honeycomb of groove wall is rough; due to the small size of component, the installation and fixation of waterstop are difficult, cause the low construction quality; furthermore, the construction efficiency is extremely low due to the complicated process of on-site pouring. SUMMARY

[0003] The utility model discloses a kind of tunnel inverted arch part structures of prefabricated water ditch, large amount of prefabricated components are used, reduce on-site process, so that it can be quickly and conveniently constructed, high reliability waterproof joint is used, avoid water ditch leakage, affect appearance and safety, improve tunnel inverted arch part construction quality, especially improve ditch quality.

[0004] The utility model discloses a kind of tunnel inverted arch part structures of prefabricated water ditch, large amount of prefabricated components are used, reduce on-site process, so that it can be quickly and conveniently constructed, high reliability waterproof joint is used, avoid water ditch leakage, affect appearance and safety, improve tunnel inverted arch part construction quality, especially improve ditch quality.

[0005] A kind of tunnel inverted arch part structure of prefabricated water ditch is set in the inverted arch part of tunnel segment, it is characterized by including center ditch and side ditch, the center ditch and the side ditch are all prefabricated components, the bottom of the center ditch is provided with leveling mortar, side ditch is set in the side of the center ditch, the side ditch is connected with the limit of tunnel segment by positioning anchor bolt, the center ditch and the side ditch are communicated by drain pipe, the inverted arch part of tunnel segment between the center ditch and the side ditch is backfilled and poured with concrete.

[0006] The center ditch includes prefabricated center ditch main body and center ditch cover plate, the end of the prefabricated center ditch main body is provided with outer convex rib plate, the outer convex rib plate is provided with connecting hole, adjacent prefabricated center ditch main body is connected after the connecting hole is connected, and connecting piece is penetrated to realize connection and fixation, the two side end faces of the prefabricated center ditch main body are respectively provided with waterstop installation groove, and the prefabricated center ditch main body is provided with drain pipe reserved port;The center ditch cover plate is covered on the prefabricated center ditch main body.

[0007] Several outer convex rib plates are evenly spaced and set on the periphery of the prefabricated center ditch main body along the longitudinal direction.

[0008] The top of the prefabricated center groove body is reserved with a cover plate rebate, and the center groove cover plate is matched with the cover plate rebate.

[0009] The side ditch comprises a prefabricated side ditch body and a side ditch cover plate, the end of the prefabricated side ditch body is provided with a connecting block, a connecting hole is formed in the connecting block, and adjacent prefabricated side ditch bodies are connected and fixed by penetrating into the connecting piece after the connecting holes are butted.

[0010] The prefabricated side ditch body is internally provided with a platform plate, and the platform plate is provided with a water permeable hole.

[0011] The platform plate is provided with an internal partition plate.

[0012] The side ditch cover plate is provided with a groove corresponding to the position of the internal partition plate, and the internal partition plate is inserted into the groove to constitute transverse limiting.

[0013] The prefabricated side ditch body is internally provided with a cable support.

[0014] The top of the prefabricated center groove body is reserved with a cover plate rebate, and the center groove cover plate is matched with the cover plate rebate.

[0015] The utility model has the advantages of:

[0016] 1) the groove adopts high-precision prefabricated parts, the single-piece quality is controllable, and the site bolt connection can be realized, without the need of binding reinforcement and erecting a formwork, so that labor and working hours are saved, and the construction efficiency can be greatly improved.

[0017] 2) the rubber pad water stop is used at the joint of the groove, has excellent anti-seepage performance, and can avoid the influence of seepage water of the groove on the appearance and even safety.

[0018] 3) the groove is prefabricated, the rebate position has high flatness, the cover plate is flat, straight, not shaking after being covered, and the comfort and safety are higher when the top of the side ditch is used as a dispersing or maintenance channel.

[0019] 4) the reliability is better, has good innovation and application value, and is worth promoting. DRAWINGS

[0020] Figure 1 It is a schematic view of the cross section of the utility model;

[0021] Figure 2 It is a schematic view of the structure of the center ditch in the utility model;

[0022] Figure 3 It is a transverse sectional view of the side ditch in the utility model;

[0023] Figure 4 It is the structural schematic view of the side ditch in the utility model. PREFERRED EMBODIMENT

[0024] The utility model features and other related features are further explained in detail below by embodiments combined with the drawings for the understanding of the same industry technical personnel:

[0025] As Figures 1-4 shown, the various reference signs in the drawing respectively represent: center ditch 1, side ditch 2, leveling mortar 3, center ditch cover plate 4, side ditch cover plate 5, drain pipe 6, positioning anchor bolt 7, concrete 8, internal partition plate 9;

[0026] Cover plate rebate 1-1, outer convex rib plate 1-2, connecting bolt hole 1-3, waterstop installation groove 1-4, drain pipe reserved hole 1-5;

[0027] Connecting bolt hole 2-1, cover plate rebate 2-2, rebate platform 2-3, connecting block 2-4, water permeable hole 2-5, platform plate 2-6, waterstop groove 2-7, drainage hole 2-8, support 2-9.

[0028] Embodiment: as Figures 1 to 4 shown, the tunnel inverted arch part structure in the embodiment adopts prefabricated water ditch, cancels the traditional site pouring water ditch, cable groove and other grooves, instead uses prefabricated components, ensures the groove quality, simplifies the construction process and improves the construction efficiency.

[0029] Specifically, as Figure 1 shown, the tunnel inverted arch part structure includes center ditch 1 and side ditch 2 located on both sides of the center ditch 1, and the center ditch 1 and the side ditch 2 are both prefabricated components. The leveling mortar 3 is arranged at the bottom of the center ditch 1, which is used for leveling the inverted arch part of the tunnel bottom and providing reasonable elevation support for the center ditch 1. The side ditch 2 is connected with the tunnel segment by the positioning anchor bolt 7, which is used for corner support of the side ditch 2 to prevent the side ditch 2 from sliding down, and also plays the role of positioning point and support fixing. The center ditch 1 and the side ditch 2 are communicated by the drain pipe 6, so that the accumulated water in the side ditch can be transferred to the center ditch 1. The inverted arch part of the tunnel segment between the center ditch 1 and the side ditch 2 is backfilled with concrete 8, which can be conventional plain concrete. When pouring, the center ditch 1 and the side ditch 2 on both sides already installed in the tunnel inverted arch part are directly used as side mold, without the need for another side mold, and pouring is convenient; but attention should be paid to symmetrical pouring and symmetrical vibration during the pouring of the concrete to prevent uneven stress on the center ditch 1.

[0030] Combined Figure 1 and Figure 2As shown, the center ditch includes a prefabricated center ditch body and a center ditch cover plate 4, which is covered on the prefabricated center ditch body to form protection. The end of the prefabricated center ditch body is provided with an outer convex rib plate 1-2, and a connecting bolt hole 1-3 is formed in the outer convex rib plate 1-2. After the connecting bolt holes 1-3 of adjacent prefabricated center ditch bodies are butted, bolts are inserted to realize connection and fixation. Water stop installation grooves 1-4 are respectively arranged on the two side end faces of the prefabricated center ditch body to provide space for installing the water stop. The water stop should be installed in the water stop installation groove 1-4 before the prefabricated center ditch body is assembled; when the prefabricated center ditch bodies of the center ditch 1 are connected, the water stop in the water stop installation groove 1-4 is butted and extruded by a certain tightening force to prevent water leakage. A drain pipe reserved opening 1-5 is arranged on the prefabricated center ditch body to provide a passing space for the drain pipe 6, so that the water at the side ditch 2 can flow into the center ditch 1.

[0031] In this embodiment, a plurality of outer convex rib plates 1-2 are uniformly arranged on the longitudinal direction of the prefabricated center ditch body at the periphery thereof, to provide strength and rigidity support for the side wall of the center ditch 1. In particular, the outer convex rib plates 1-2 can be embedded in the concrete 8 after the concrete 8 is backfilled and poured, to improve the connection performance between the center ditch 1 and the concrete 8, and to ensure the structural strength and stability of the center ditch 1.

[0032] A cover plate rebate 1-1 is reserved on the top of the prefabricated center ditch body. The cover plate rebate 1-1 cooperates with the center ditch cover plate 4 to facilitate the installation of the center ditch cover plate 4. The height of the cover plate rebate 1-1 is the same as the thickness of the center ditch cover plate 4, to ensure that the cover plate is flat, straight and not wobbly.

[0033] In combination with Figure 1 , Figure 3 and Figure 4 As shown, the side ditch includes a prefabricated side ditch body and a side ditch cover plate 5, which is covered on the prefabricated side ditch body. The end of the prefabricated side ditch body is provided with a connecting block 2-4, and a connecting bolt hole 2-1 is formed in the connecting block 2-4. After the connecting bolt holes 2-1 of adjacent prefabricated side ditch bodies are butted, bolts are inserted to realize connection and fixation. Water stop grooves 2-7 are respectively arranged on the two side end faces of the prefabricated side ditch body to provide space for installing the water stop. The water stop should be installed in the water stop installation groove 2-7 before the pipe joint is assembled and extruded by a certain tightening force to prevent water leakage. A drain hole 2-8 is arranged on the prefabricated side ditch body, which is used to connect the drain pipe 6.

[0034] In the embodiment, a platform plate 2-6 is arranged inside the prefabricated side ditch body, which is used to place cables and provide support for the inner partition plate 9; water-permeable holes are arranged at the roots of the platform plate 2-6 at intervals to ensure the passage of water. The inner partition plate 9 is used to divide the internal space of the side ditch 2 to form chambers with different functions; in use, 1-2 partition plates can be arranged to meet the functional requirements of the chambers. A support 2-9 is arranged inside the prefabricated side ditch body to facilitate the layered laying of cables. Water-permeable holes are arranged at the roots of the support at intervals.

[0035] A cover plate rebate 2-2 is reserved at the top of the prefabricated side ditch body, which is arranged as a haunch rebate to facilitate the installation of the side ditch cover plate 5, and the height of the cover plate rebate 2-2 is the same as the thickness of the side ditch cover plate 5; at the same time, the cover plate rebate 2-2 provides space for the arrangement of the bolt holes 2-1.

[0036] In the application of the embodiment, the following steps are included:

[0037] After the pouring of the second lining of the tunnel is completed, the remaining structure of the inverted arch part is implemented according to the following steps.

[0038] 1) The tunnel inner bottom is constructed with leveling mortar 3, and the center ditch 1 is positioned and assembled above the leveling mortar 3.

[0039] 2) According to the planned installation position of the side ditches 2 on both sides, the positioning anchor bolts 7 are measured and laid out, and the positioning anchor bolts 7 are required to have the functions of preventing the side ditches on both sides from sliding downward and accurately positioning.

[0040] 3) The drainage holes 2-8 of the side ditches 2 on both sides are connected to the drainage pipe reserved holes 1-5 of the center ditch 1 using the drainage pipes 6. To ensure the connection quality and facilitate construction, water pipe joints can be buried around the reserved holes when the prefabricated center ditch 1 and side ditches 2 are prepared.

[0041] 4) The concrete 8 is poured in the inverted arch backfill area, vibrated and compacted, and manually finished; the gaps between the side ditches 2 on both sides and the second lining are filled with cement mortar.

[0042] 5) According to the functional role and actual application requirements of the side ditches 2 on both sides, the internal space of the side ditches 2 on both sides is partitioned, and the inner partition plate 9 is installed.

[0043] 6) The center ditch cover plate 4 and the side ditch cover plates 5 on both sides are laid, and the construction of the inverted arch part of the tunnel is completed.

[0044] The prefabricated side ditch 2 and the center ditch 1 components are mainly used in the embodiment to position and assemble on site, which can save the processes of on-site binding of steel bars and erection of formwork, greatly improving the construction efficiency and quality.

[0045] Although the above embodiments have been described in detail with reference to the accompanying drawings, those skilled in the art can realize that various improvements and changes can be made to the present application without departing from the scope defined by the claims, and therefore, the above description is not exhaustive.

Claims

1. A structure of a tunnel inverted arch part using a precast water channel, which is provided at an inverted arch part of a tunnel segment, characterized in that: The center ditch and the side ditch are prefabricated components, the bottom of the center ditch is provided with leveling mortar, the side ditch is provided on the side of the center ditch, the side ditch is connected with the tunnel segment through positioning anchor bolt, the center ditch and the side ditch are communicated through the drain pipe, and the inverted arch part of the tunnel segment between the center ditch and the side ditch is backfilled and poured with concrete.

2. The structure of the tunnel inverted arch part with prefabricated water channel according to claim 1, characterized in that: The center ditch comprises a prefabricated center ditch body and a center ditch cover plate, the end of the prefabricated center ditch body is provided with an outer convex rib plate, the outer convex rib plate is provided with a connecting hole, adjacent prefabricated center ditch bodies are connected and fixed through connecting pieces after the connecting holes are butted, the two side end faces of the prefabricated center ditch body are respectively provided with water stop strip installation grooves, and the prefabricated center ditch body is provided with a drain pipe reserved opening.

3. A structure of a tunnel inverted arch part using a precast water channel according to claim 2, characterized in that: A plurality of outer convex rib plates are uniformly and spacedly arranged on the periphery of the prefabricated center ditch body along the longitudinal direction of the prefabricated center ditch body.

4. The structure of the inverted arch part of a tunnel with a prefabricated water channel according to claim 2, characterized in that: The top of the prefabricated center ditch body is reserved with a cover plate rebate, and the center ditch cover plate is matched with the cover plate rebate.

5. The structure of the inverted arch part of a tunnel with a prefabricated water channel according to claim 1, characterized in that: The side ditch comprises a prefabricated side ditch body and a side ditch cover plate, the end of the prefabricated side ditch body is provided with a connecting block, the connecting block is provided with a connecting hole, adjacent prefabricated side ditch bodies are connected and fixed through connecting pieces after the connecting holes are butted, the two side end faces of the prefabricated side ditch body are respectively provided with water stop strip grooves, and the prefabricated side ditch body is provided with a drain hole; and the side ditch cover plate is arranged on the prefabricated side ditch body.

6. A structure for a tunnel invert according to claim 5, wherein: The prefabricated side ditch body is internally provided with a platform plate, and the platform plate is provided with a water permeable hole.

7. A structure for a tunnel invert according to claim 6, wherein: The platform plate is provided with an internal partition plate.

8. A structure for a tunnel invert according to claim 7, wherein: The side ditch cover plate is provided with a groove corresponding to the position of the internal partition plate, and the internal partition plate is inserted into the groove to form transverse limiting.

9. The structure of the inverted arch part of a tunnel with a prefabricated water channel according to claim 5, characterized in that: The prefabricated side ditch body is internally provided with a cable support.

10. The structure of the inverted arch part of a tunnel with a prefabricated water channel according to claim 5, characterized in that: The top of the prefabricated side ditch body is reserved with a cover plate rebate, and the center ditch cover plate is matched with the cover plate rebate.

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