CN210888963U - Low-prestress waterproof structure for tunnel construction joint - Google Patents
Low-prestress waterproof structure for tunnel construction joint Download PDFInfo
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- CN210888963U CN210888963U CN201921783591.9U CN201921783591U CN210888963U CN 210888963 U CN210888963 U CN 210888963U CN 201921783591 U CN201921783591 U CN 201921783591U CN 210888963 U CN210888963 U CN 210888963U
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- construction joint
- anchor
- prestress
- waterproof
- reserved hole
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Abstract
The utility model discloses a low-prestress waterproof structure of a tunnel construction joint, which solves the problem that the water band is easy to be damaged and cannot be repaired to cause poor waterproof effect of the construction joint in the prior art, and has the effects of improving waterproof water seepage performance, effectively preventing the construction joint from cracking or being damaged due to overlarge stress; the technical scheme is as follows: the construction method comprises the steps of penetrating a reserved hole channel buried in a secondary lining or box culvert construction joint, penetrating an anchor rope in the reserved hole channel, and performing prestress tensioning on the construction joint through the anchor rope in the reserved hole channel; the anchor cable comprises a steel strand, two ends of the steel strand are connected with the rigging through anchor gaskets respectively, and a waterproof gasket is arranged between each anchor gasket and the reserved hole channel.
Description
Technical Field
The utility model relates to a tunnel waterproof engineering technical field especially relates to a low prestressing force waterproof construction of tunnel construction joint.
Background
Rubber waterstops, steel-edged waterstops and other structures are generally adopted in a tunnel or box culvert construction joint waterproof system, and the inventor finds that the waterstops are always damaged integrally or separated from concrete due to the effect of lining internal force in the using process, so that water leakage of the tunnel or box culvert is caused. For some tunnel projects, the water stop belt is not replaceable and cannot be repaired once damaged.
In the back-attached self-adhesive plastic water stop belt disclosed in the prior art, the water stop belt firmly bonds the water stop area and the secondary lining concrete together, so that the further leakage of the leakage water to the construction joint is prevented, but the whole damage of the water stop belt is caused by the easy deformation and cracking of the construction joint, and the waterproof effect of the construction joint is influenced.
The bidirectional prestress reinforcing device for the shield tunnel pipe side disclosed in the prior art is a combined pipe piece with at least one special pipe piece in the middle of a plurality of groups of ring-shaped arrangements, a stress ring is embedded in each ring of special pipe piece, and the uneven deformation of the pipe piece is limited in the longitudinal direction of the pipe piece through steel strands.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides a low prestressing force waterproof construction of tunnel construction joint, it has the effect that improves waterproof water seepage performance, effectual construction joint fracture or atress too big lead to destroying.
The utility model adopts the following technical proposal:
a low-prestress waterproof structure of a tunnel construction joint comprises a reserved pore passage which penetrates through a secondary lining or box culvert construction joint and is embedded, an anchor cable penetrates through the reserved pore passage, and the construction joint is subjected to prestress tensioning through the anchor cable in the reserved pore passage;
the anchor cable comprises a steel strand, two ends of the steel strand are connected with the rigging through anchor gaskets respectively, and a waterproof gasket is arranged between each anchor gasket and the reserved hole channel.
Further, the reserved hole channel is arc-shaped.
Furthermore, the arc angle of the reserved hole channel is 120-150 degrees.
Further, the arc top position of the reserved hole is located at 1/2 of the secondary lining or the box culvert.
Furthermore, the reserved hole channels are distributed in a single layer.
Furthermore, the waterproof gasket is fixed with the reserved hole channel and the anchor gasket through waterproof glue.
Furthermore, the circumferential interval of the anchor cable is 1-3 m.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model adopts the anchor cable to apply low prestress to the construction joint, so that the concrete at the two sides of the construction joint is closely contacted, and the waterproof and water seepage performance is improved; the anchor cable has good aging resistance and can be replaced at any time after being damaged;
(2) the utility model applies the waterproof gasket between the anchor gasket and the reserved hole channel, which can prevent the leakage water permeating the reserved hole channel from entering the tunnel, and improve the waterproof water seepage effect;
(3) the utility model discloses a prestressing force anchor cable structure, the effectual destruction that prevents construction joint fracture or atress too big and lead to of prestressing force in advance.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of FIG. 1 at B;
fig. 4 is a schematic structural diagram of a second embodiment of the present invention;
the method comprises the following steps of 1-secondary lining, 2-reserved hole channels, 3-anchor cables, 301-steel stranded wires, 302-rigging, 303-anchor gaskets and 4-waterproof gaskets.
Detailed Description
Just as the background art introduces, exist among the prior art waterstop and easily destroy and can't restore and lead to the poor not enough of construction joint water-proof effects, in order to solve above-mentioned technical problem, the utility model provides a low prestressing force waterproof construction of tunnel construction joint.
The first embodiment is as follows:
the present invention will be described in detail with reference to the accompanying drawings 1-3, and specifically, the structure is as follows:
the embodiment provides a low prestressing force waterproof construction of tunnel construction joint, including reserving pore 2, anchor rope 3, waterproof gasket 4, reserve pore 2 and bury in secondary lining 1 in the tunnel, and reserve pore 2 and pass the construction joint of secondary lining 1. The anchor cable 3 penetrates through the reserved hole 2, so that the reserved hole 2 can conduct prestress tensioning on the construction joint of the secondary lining 1.
After the secondary lining 1 of the tunnel is demoulded, the anchor cable 3 passes through the reserved hole channel 2 and the anchor backing plate 303, the waterproof gasket 4 is added between the reserved hole channel 2 and the anchor backing plate 303, low prestress is applied to two sides of the construction joint by adopting a post-tensioning method, then the rigging 302 is applied, and the circumferential distance of the rigging 302 is 1-3 m.
As shown in fig. 2, the reserved hole 2 is an arc-shaped hole, and the arc angle is controlled to be 120-150 degrees, so as to ensure that the rigging 302 and the anchor pad 303 in the anchor cable 3 have a certain safety distance from the construction joint. The reserved hole 2 is arranged in a single layer, and the arc top position of the reserved hole is located at 1/2 of the secondary lining 1, so that the construction joint is uniformly stressed up and down.
The specific implementation steps of this embodiment are as follows:
(1) positioning and burying a reserved hole channel 2 when the secondary lining 1 is constructed in the tunnel;
(2) after the secondary lining 1 is demolded, the steel strand 301 passes through the reserved hole channel 2, the waterproof gasket 4 and the anchor gasket 303, wherein the waterproof gasket 4 is located between the reserved hole channel 2 and the anchor gasket 303, low prestress is simultaneously tensioned and applied to two ends of the steel strand 301 by adopting a post-tensioning method, and the rigging 302 is applied after tensioning.
Example two:
this embodiment provides a low prestressing force waterproof construction of tunnel construction joint, as shown in fig. 4, including reserving pore 2, anchor rope 3, waterproof gasket 4, reserve pore 2 and bury underground in the box culvert in tunnel, and reserve pore 2 and pass the construction joint of box culvert.
Other structures are the same as those of the first embodiment, and are not described herein again.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A low-prestress waterproof structure of a tunnel construction joint is characterized by comprising a reserved pore passage which penetrates through a secondary lining or is buried in a box culvert construction joint, an anchor cable penetrates through the reserved pore passage, and the construction joint is subjected to prestress tensioning through the anchor cable in the reserved pore passage;
the anchor cable comprises a steel strand, two ends of the steel strand are connected with the rigging through anchor gaskets respectively, and a waterproof gasket is arranged between each anchor gasket and the reserved hole channel.
2. The low-prestress waterproof structure for the tunnel construction joint as claimed in claim 1, wherein the reserved hole is arc-shaped.
3. The low-prestress waterproof structure for the tunnel construction joint as claimed in claim 2, wherein the arc angle of the reserved hole is 120-150 °.
4. The low-prestress waterproof structure for the tunnel construction joint as claimed in claim 2, wherein the arc top position of the reserved hole is located at 1/2 of a secondary lining or a box culvert.
5. The low-prestress waterproof structure for the tunnel construction joint as claimed in claim 1, wherein the reserved hole is arranged in a single layer.
6. The low-prestress waterproof structure for the tunnel construction joint as claimed in claim 1, wherein the waterproof gasket is fixed with the reserved hole and the anchor gasket through a waterproof glue.
7. The low-prestress waterproof structure for the tunnel construction joint as claimed in claim 1, wherein the circumferential distance between the anchor cables is 1-3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921783591.9U CN210888963U (en) | 2019-10-22 | 2019-10-22 | Low-prestress waterproof structure for tunnel construction joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921783591.9U CN210888963U (en) | 2019-10-22 | 2019-10-22 | Low-prestress waterproof structure for tunnel construction joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210888963U true CN210888963U (en) | 2020-06-30 |
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ID=71334658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921783591.9U Active CN210888963U (en) | 2019-10-22 | 2019-10-22 | Low-prestress waterproof structure for tunnel construction joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210888963U (en) |
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2019
- 2019-10-22 CN CN201921783591.9U patent/CN210888963U/en active Active
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