Leakage water disease treatment structure for tunnel deformation joint under freezing and thawing conditions

Abstract

The utility model relates to the technical field of tunnel engineering disease prevention and control, in particular to a tunnel deformation joint leakage water disease treatment structure under freeze thawing conditions, which comprises a stratum, a primary support and a tunnel lining are sequentially arranged on one side of the stratum, and a back-attached waterstop is arranged between the tunnel lining and the primary support; a deformation joint is arranged in the tunnel lining, and a steel plate middle-buried water stop belt is arranged in the middle of the deformation joint. A heating device is arranged in the area, located outside the steel plate middle-buried water stop belt, of the deformation joint, a drainage structure is arranged outside the heating device, and a water stop structure is arranged outside the drainage structure. And a gap in a deformation joint area between the steel plate middle-buried water stop belt and the back-attached water stop belt is filled with a grouting water stop material. The heating device is installed at the leakage position of the deformation joint, and grouting liquid reaction and plugging are promoted. A water stop structure is arranged on the downstream face of the deformation joint after grouting, a physical extrusion waterproof measure is formed, the deformation requirements of expansion caused by heat and contraction caused by cold and the like of the deformation joint can be met, and the water stop effectiveness is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering disease prevention and control, in particular to a tunnel deformation joint water leakage disease control structure under freeze-thaw conditions. Background Art

[0002] Tunnel structure water leakage is the main disease that affects the normal use of tunnels, and poses a serious safety hazard to the safe operation of trains, the riding experience of passengers, and the normal operation of equipment. In particular, once water leakage occurs in the tunnel deformation joint, the amount of water leakage is large, and since the deformation joint is set as a whole ring, it needs to be treated in the whole ring, which is difficult to treat. The existing tunnel waterproof structure is usually: Figure 1 As shown, a back-stick waterstop is set between the initial support and the tunnel lining, a lining plate is set on the outside of the back-stick waterstop, a steel plate embedded waterstop is set in the middle of the lining plate, a sealant is set on the outside of the steel plate embedded waterstop, and a water receiving box is set on the surface of the tunnel lining. When the waterproof layer on the water-facing side of the lining is damaged, the formation water will penetrate into the water-facing side of the structure along the damaged position, and form a water path along the weak position of the back-stick waterstop and concrete. The leaked water fills the water-facing side of the deformation joint. When the steel plate embedded waterstop is damaged, the water will further leak along the damaged position of the steel plate embedded waterstop to the back water surface of the lining, and gush out along the water receiving box, resulting in obvious deformation joint water leakage problems.

[0003] Existing tunnel deformation joint water leakage is mostly treated and sealed by grouting. The construction process is as follows: the on-site disease inspection is confirmed before construction, and then the water collection box is removed, holes are drilled on both sides of the deformation joint to the water-facing surface of the deformation joint, and grouting needles are installed in the grouting holes for grouting. After the grouting water-stopping liquid fills the leakage water channel, the leakage water is squeezed out of the channel, the grouting needles are removed, and the grouting holes are sealed with quick-drying cement. Then the deformation joint water collection box is installed to complete the grouting water-stopping construction.

[0004] However, this construction method is not suitable for cold areas in the north, especially in winter when the temperature is low and the leaking water freezes. The leaking water freezes in the expansion joints, and the water on the back of the expansion joints that leaks out from the water receiving box also freezes and forms ice cones. Since the leakage water path has been formed, even if the ice cones are cleared, the problem of freezing will occur again in a very short time as the water continues to seep out, resulting in the following defects:

[0005] (1) Water freezes on the back surface, front surface and gap of the expansion joint. When the water freezes and expands, the water-stop slurry will be damaged and cracked under the action of the expansion force, resulting in water-stop failure and repeated leakage;

[0006] (2) In a low-temperature environment, water has frozen, and the grouting slurry cannot effectively fill the space where the ice is located. As the ice melts, the space occupied by the ice is very likely to form a leakage channel, resulting in repeated leakage;

[0007] (3) The grouting liquid used in the conventional grouting water-stopping method needs to react with water, but the reaction is extremely slow in a low temperature environment, resulting in an unsatisfactory water-stopping effect.

[0008] Therefore, the existing grouting water-stopping treatment technology has low effectiveness in treating deformation joint leakage problems in low-temperature environments. Utility Model Content

[0009] In order to solve at least one technical problem existing in the prior art, the utility model provides a structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions.

[0010] To achieve the above purpose, the technical solution of the utility model is as follows:

[0011] A structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions comprises a stratum, an initial support and a tunnel lining are arranged in sequence on one side of the stratum, a back-sticking waterstop is arranged between the tunnel lining and the initial support; a deformation joint is arranged inside the tunnel lining, a steel plate embedded waterstop is arranged in the middle of the deformation joint; a heating device is arranged in the area where the deformation joint is located outside the steel plate embedded waterstop, a drainage structure is arranged outside the heating device, and a waterstop structure is arranged outside the drainage structure; and a gap in the deformation joint area between the steel plate embedded waterstop and the back-sticking waterstop is filled with a grouting waterstop material.

[0012] Furthermore, a lining plate is arranged in the deformation joint area between the waterstop strip embedded in the steel plate and the back-attached waterstop strip.

[0013] Furthermore, grouting holes are arranged on both sides of the deformation joint, the grouting holes are inclined grouting holes, the grouting ports of the grouting holes are arranged on the tunnel lining surface, and the grouting outlets of the grouting holes are arranged in the deformation joint area between the waterstop embedded in the steel plate and the back waterstop.

[0014] Furthermore, a groove is arranged on the surface of the tunnel lining, a water receiving box is arranged in the groove, and the water receiving box covers the deformation joint.

[0015] Furthermore, a protective coating layer is provided on the side wall of the groove.

[0016] Furthermore, the heating device includes a protection tube and a heating element inside the protection tube.

[0017] Furthermore, the heating element is an electric heating belt or an electric heating rod, and the electric heating belt or the electric heating rod is connected to an external control box.

[0018] Furthermore, the drainage structure is a water collecting pipe.

[0019] Furthermore, the water-stopping structure comprises a rubber plate and an elastic compression device, the rubber plate is U-shaped, and the elastic compression device is arranged inside the rubber plate.

[0020] Furthermore, the U-shaped opening of the rubber plate faces outward.

[0021] Furthermore, pressure strips are arranged on both sides of the rubber plate, and an elastic compression device is arranged between the pressure strips on both sides.

[0022] Furthermore, a spring is arranged inside the elastic compression device, and both ends of the spring squeeze the pressure strip.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model provides a tunnel deformation joint water leakage control structure under freeze-thaw conditions. A heating device is installed at the deformation joint leakage position to melt the frozen leakage water, and then the leakage water is discharged. The heating device can not only melt the frozen leakage water, but also increase the ambient temperature, provide a favorable environment for subsequent grouting and water stopping, and promote the reaction and blocking of the grouting liquid. After grouting, a water-stopping structure is set on the back water surface of the deformation joint to form a physical extrusion waterproofing measure, which can adapt to the deformation requirements of the deformation joint such as thermal expansion and contraction, and further improve the effectiveness of water stopping. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the existing tunnel waterproofing structure.

[0026] Figure 2 It is a schematic diagram of the governance structure of the utility model.

[0027] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0028] Reference numerals:

[0029] 1. Stratum, 2. Initial support, 3. Water layer, 4. Waterproof layer, 5. Back-attached waterstop, 6. Tunnel lining, 7. Lining plate, 8. Steel buried waterstop, 9. Water collection box, 10. Heating device, 11. Water collecting pipe, 12. Rubber sheet, 13. Elastic compression device, 14. Layer, 15. Protective coating layer. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0031] It should be noted that, unless otherwise specifically stated, the relative arrangements and numerical expressions of the components and steps described in these embodiments should not be construed as limiting the scope of the present invention.

[0032] The following description of the exemplary embodiments is merely illustrative and does not in any sense limit the present invention and its application or use. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail here, but in the case of applying these techniques, methods and devices, these techniques, methods and devices should be regarded as part of this specification.

[0033] like Figure 1 The figure shows the existing tunnel waterproof structure, wherein one side of the tunnel stratum 1 is provided with an initial support 2 and a tunnel lining 6, a water layer 3 is provided between the initial support 2 and the tunnel lining 6, a waterproof layer 4 is provided between the water layer 3 and the tunnel lining 6, a back-attached waterstop 5 is provided between the waterproof layer 4 and the tunnel lining 6, a deformation joint is provided inside the tunnel lining 6, a steel plate embedded waterstop 8 is provided in the middle of the deformation joint, lining plates 7 are provided on both sides of the steel plate embedded waterstop 8, and a water receiving box 9 is provided at the outer end of the deformation joint. When the waterproof layer 4 on the water-facing side of the lining is damaged, the formation water will penetrate into the water-facing side of the structure along the damaged position, and form a water path along the weak position where the back waterstop 5 is connected to the concrete. The leaked water fills the water-facing side of the deformation joint. When the embedded waterstop 8 in the steel is damaged, the water will further penetrate along the damaged position of the embedded waterstop 8 in the steel to the back water side of the lining, pass through the liner plate 7, and flow out along the water receiving box 9, resulting in obvious water leakage in the deformation joint. In a low temperature environment, the leaked water freezes and accumulates to form floating ice.

[0034] Aiming at the leakage problem of tunnel deformation joints under freeze-thaw conditions, the utility model provides a structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions, such as Figure 2 and Figure 3 As shown, it includes a stratum 1, an initial support 2 and a tunnel lining 6 are arranged on one side of the stratum 1 in sequence, a water layer 3 is provided between the initial support 2 and the tunnel lining 6, and the water layer 3 also has a waterproof layer 4 on the side close to the tunnel lining 6; a back waterstop 5 is provided between the tunnel lining 6 and the initial support 2 and on the outside of the waterproof layer 4; a deformation joint is provided inside the tunnel lining 6, the port inside the deformation joint extends into the back waterstop 5, and the port outside the deformation joint extends to the surface of the tunnel lining 6.

[0035] A steel plate embedded waterstop 8 is arranged in the middle of the deformation joint; a heating device 10 is arranged in the area outside the steel plate embedded waterstop 8, the heating device 10 is arranged close to the steel plate embedded waterstop 8, a drainage structure is arranged outside the heating device 10, and a waterstop structure is arranged outside the drainage structure; a lining plate 7 is arranged in the deformation joint area between the steel plate embedded waterstop 8 and the back waterstop 5, and the gap in the deformation joint area between the steel plate embedded waterstop 8 and the back waterstop 5 is filled with grouting waterstop material.

[0036] Grouting holes are arranged on both sides of the deformation joint, and the gap in the deformation joint area between the waterstop 8 embedded in the steel plate and the back-attached waterstop 5 is filled with the grouting holes. The grouting holes are inclined grouting holes, the grouting ports of the grouting holes are arranged on the surface of the tunnel lining 6, and the grouting outlets of the grouting holes are arranged in the deformation joint area between the waterstop 8 embedded in the steel plate and the back-attached waterstop 5.

[0037] The surface of the tunnel lining 6 is provided with a groove, in which a water receiving box 9 is provided, and the deformation joint is covered by the water receiving box 9. A protective coating layer 15 is provided on the side wall of the groove, and at the same time, a protective coating layer 15 is also provided on the surface of the tunnel lining close to the groove.

[0038] The heating device 10 includes a protective tube and a heating element inside the protective tube. The protective tube is a stainless steel tube used to protect the heating element inside it; the heating element is an electric belt or electric heating rod, which is connected to an external control box. The drainage structure is a water collecting pipe 11. The water stopping structure includes a rubber plate 12 and an elastic compression device 13, such as Figure 3 As shown, the cross section of the rubber sheet 12 is U-shaped and is arranged along the entire ring of the deformation joint; an elastic compression device 13 is arranged inside the rubber sheet 12, and the elastic compression device 13 is arranged at intervals along the entire ring of the deformation joint. The U-shaped opening of the rubber sheet 12 faces outward, and the rubber sheet 12 is bonded to the side walls on both sides of the deformation joint by using adhesive. Beads 14 are arranged on both sides of the rubber sheet 12, and an elastic compression device 13 is arranged between the bead strips 14 on both sides. The elastic compression device 13 includes a shell, and the shell has top columns at both ends. The top columns are in contact with the bead strip 14. A spring is arranged between the top columns at both ends, and the spring squeezes the top columns, thereby squeezing the bead strip 14. The bead strip 14 is compressed by the elastic action of the spring to form a physical extrusion waterproof effect. When the deformation joint is deformed, the elastic compression device 13 can shrink or stretch, so that the rubber sheet 12 is always in close contact with the side walls of the deformation joint, thereby achieving a waterproof effect.

[0039] The construction principle of the utility model is:

[0040] S1. Clear the entire ring of floating ice at the leakage position of the deformation joint, and remove the water receiving box 9; after the water receiving box 9 is removed, the leakage point is exposed.

[0041] S2. Install a heating device 10 on the back surface of the deformation joint, and use the heating device 10 to melt the frozen leakage water; first remove the lining plate 7 on the back surface of the deformation joint, and install the heating device 10 in the space where the lining plate 7 is removed. The heating device 10 includes a protective tube and a heating element inside the protective tube. The heating element is connected to an external control box, and the heating power of the heating element is controlled by the control box, thereby controlling the heating temperature. After the heating device 10 is installed, start the heating device 10 to melt the leakage water in the deformation joint.

[0042] S3. Use a drainage structure to lead the melted seepage water to the drainage ditch; the drainage structure is a water collecting pipe 11, which is installed in the space where the liner plate 7 is removed and on the outside of the heating device 10. The water collecting pipe 11 is installed along the entire ring, and the seepage water in the deformation joint is collected by the water collecting pipe 11, and the seepage water is led to the tunnel drainage ditch at the bottom of the water collecting pipe 11.

[0043] S4. Drill holes on both sides of the expansion joint to the water-facing surface of the expansion joint. The holes are inclined holes on both sides of the expansion joint. Use an electric drill to construct, and then install grouting needles in the holes to perform grouting to stop water.

[0044] S5. After grouting is completed, a water-stopping structure is embedded in the back water surface end of the deformation joint. Specifically, the water-stopping structure is installed in the space where the lining plate 7 is removed from the back water surface of the deformation joint, that is, on the outside of the water collecting pipe 11. After the water-stopping structure is embedded in the back water surface end of the deformation joint, a protective coating is applied on the surface of the tunnel lining, and then the water collecting box 9 is installed.

[0045] Example 1

[0046] This embodiment is aimed at treating water leakage in tunnel deformation joints in a certain area in the north. The temperature in the area is lower than -10°C in winter, and the leaking water freezes. The leakage point is located at a 45° position on the side of the arch. After the construction of the tunnel deformation joint water leakage disease treatment structure under freeze-thaw cycle conditions of the utility model, the leakage position is blocked, and there is no leakage or re-leakage.

[0047] The above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions, characterized in that: It includes a stratum, and initial support and tunnel lining are arranged on one side of the stratum in sequence, and a back-sticked waterstop is arranged between the tunnel lining and the initial support; a deformation joint is arranged inside the tunnel lining, and a steel plate embedded waterstop is arranged in the middle of the deformation joint; a heating device is arranged in the area outside the deformation joint of the steel plate embedded waterstop, a drainage structure is arranged outside the heating device, and a waterstop structure is arranged outside the drainage structure; the gap in the deformation joint area between the steel plate embedded waterstop and the back-sticked waterstop is filled with grouting waterstop material.

2. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 1 is characterized in that: A liner plate is arranged in the deformation joint area between the waterstop embedded in the steel plate and the back-attached waterstop.

3. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 1 is characterized in that: Grouting holes are arranged on both sides of the deformation joint, the grouting holes are inclined grouting holes, the grouting ports of the grouting holes are arranged on the tunnel lining surface, and the grouting outlets of the grouting holes are arranged in the deformation joint area between the waterstop embedded in the steel plate and the back waterstop.

4. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 1 is characterized in that: A groove is arranged on the surface of the tunnel lining, a water receiving box is arranged in the groove, and the water receiving box covers the deformation joint.

5. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 4 is characterized in that: A protective coating layer is arranged on the side wall of the groove.

6. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 1 is characterized in that: The heating device comprises a protection tube and a heating element inside the protection tube.

7. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 6 is characterized in that: The heating element is an electric heating belt or an electric heating rod, and the electric heating belt or the electric heating rod is connected to an external control box.

8. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 1 is characterized in that: The water-stopping structure comprises a rubber plate and an elastic compression device, the rubber plate is U-shaped, and the elastic compression device is arranged inside the rubber plate.

9. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 8 is characterized in that: The U-shaped opening of the rubber plate faces outward; pressure strips are arranged on both sides of the rubber plate, and an elastic compression device is arranged between the pressure strips on both sides.

10. The structure for treating water leakage in tunnel deformation joints under freeze-thaw conditions according to claim 9, characterized in that: A spring is arranged inside the elastic compression device, and two ends of the spring squeeze the pressure strip.

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