CN220621886U - Template structure suitable for tunnel cast-in-place concrete lining - Google Patents
Template structure suitable for tunnel cast-in-place concrete lining Download PDFInfo
- Publication number
- CN220621886U CN220621886U CN202322418814.4U CN202322418814U CN220621886U CN 220621886 U CN220621886 U CN 220621886U CN 202322418814 U CN202322418814 U CN 202322418814U CN 220621886 U CN220621886 U CN 220621886U
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- pouring
- concrete
- lining
- tunnel
- bottom plate
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 238000009415 formwork Methods 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 16
- 238000009434 installation Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a formwork structure suitable for a tunnel cast-in-place concrete lining, which comprises a steel formwork, an exhaust piece, at least one pair of bottom plate pouring windows, at least one pair of side wall pouring windows and pouring holes arranged at the top of the steel formwork, wherein the steel formwork is arranged in the tunnel in a supporting mode along the length direction of the tunnel; the side wall pouring windows are symmetrically arranged at the waist of the steel template. According to the utility model, the exhaust pipe is arranged at the bottom center of the steel template, and bubbles in the concrete of the lining bottom plate can be discharged from the exhaust pipe, so that the pouring quality of the lining bottom plate is effectively improved; the top of the steel template is provided with a pouring hole, concrete can be directly conveyed to the arch part by means of a concrete pump, and the concrete is tightly filled by the pressure of the concrete pump, so that the concrete pouring compactness of the arch part is improved.
Description
Technical Field
The utility model relates to the field of tunnel construction, in particular to a template structure suitable for a cast-in-place concrete lining of a tunnel.
Background
After the water delivery tunnel is excavated and formed, a layer of concrete lining structure is often required to be poured in the water delivery tunnel, so that the water delivery tunnel is used as a permanent stress structure for bearing surrounding rock pressure, and the roughness of a water delivery section can be improved, and the water delivery capacity of the tunnel is improved. Therefore, the construction quality of the tunnel concrete lining structure is a key link for determining whether the tunnel can safely and stably run for a long time. At present, a common construction method for tunnel concrete lining is to cast in situ by adopting concrete. However, because the construction space in the tunnel is limited, the concrete lining is poured from inside to outside, the construction quality is not easy to control, such as the quality defects of honeycomb, pitting surface and the like are easy to occur in the concrete at the bottom of the tunnel, and weak links such as pores, cavities and the like are easy to occur in the vault concrete due to the fact that the filling is not compact.
Aiming at the concrete construction quality problems of the tunnel lining bottom and the vault, the prior proposal is mostly focused on the improvement of a pouring method, such as adopting the separate-bin pouring and adding the vault backfilling grouting procedure. The separate casting is to cast the bottom plate and the lower half part of the side wall first, and air bubbles can be discharged from the side surface in the casting process, so that the improvement of the bottom concrete casting quality is facilitated. However, the concrete cold joint formed by separate casting weakens the integrity of the lining structure and has hidden danger of water leakage. Although the backfill grouting can solve the problems of pores, cavities and the like of the top arch to a certain extent, the construction period is inevitably prolonged, and the engineering investment is increased.
However, for the construction technology of the cast-in-place concrete of the tunnel, the template is a key factor influencing the construction quality, the progress and the construction procedure, and how to design a template structure which can realize casting and exhausting at the same time, ensure the compactness of the concrete of the vault and realize one-time casting molding is important for the water delivery tunnel.
Disclosure of Invention
In view of the above, the utility model provides a formwork structure suitable for cast-in-place concrete lining of a tunnel, which can realize the exhaust of bottom plate concrete and the pressurized casting of top arch concrete in the casting process, is beneficial to the integral casting molding of the lining of the tunnel and improves the construction efficiency and the construction quality of the lining.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the template structure suitable for the cast-in-place concrete lining of the tunnel comprises a steel template which is supported in the tunnel along the length direction of the tunnel, wherein a lining pouring cavity is formed by the steel template and the excavation surface of the tunnel; the template structure further comprises an exhaust piece, at least one pair of bottom plate pouring windows, at least one pair of side wall pouring windows and pouring holes formed in the top of the steel template, wherein the exhaust piece is vertically arranged at the bottom of the steel template and is communicated with the lining pouring cavity; the bottom plate pouring windows are symmetrically arranged below the side of the steel template; the side wall pouring windows are symmetrically arranged at the waist of the steel template.
The beneficial effects are that: according to the utility model, the exhaust pipe is arranged at the bottom center of the steel template, and air bubbles in the concrete of the lining bottom plate can be discharged from the exhaust pipe, so that the pouring quality of the lining bottom plate is effectively improved. According to the utility model, the top of the steel template is provided with the pouring hole, concrete can be directly conveyed to the arch part by means of a concrete pump, and the concrete is tightly filled by the pressure of the concrete pump, so that the concrete pouring compactness of the arch part is improved.
Preferably, the bottom plate of the steel template is horizontally arranged, a mounting port communicated with the lining pouring cavity is formed in the bottom plate, and the exhaust piece is an exhaust pipe fixed on the mounting port. During actual installation, the exhaust pipe and the installation opening are in threaded connection, and the installation is simple and convenient.
Preferably, the pouring hole is provided with a connector with a step-shaped structure and a large upper part and a small lower part, and the connector is fixedly connected with the concrete pressure pipe through threads or flanges; and a plugging plate is inserted in the connector, and one end part of the plugging plate is provided with a through hole for communicating the concrete pressure pipe with the lining casting cavity. When the through hole of the plugging plate moves into the connector, the connector is in an open state, so that concrete is convenient to pour; when the through hole of the plugging plate moves out of the connector, the other end of the plugging plate seals the connector, so that the concrete pressure pipe is convenient to detach.
Compared with the prior art, the utility model has the advantages that the exhaust pipe is arranged at the bottom center position of the steel template, and air bubbles in the concrete of the lining bottom plate can be discharged from the exhaust pipe, so that the pouring quality of the lining bottom plate is effectively improved. According to the utility model, the pouring hole is formed in the top of the steel template, concrete can be directly conveyed to the arch part by means of a concrete pump, the concrete is tightly filled by the pressure of the concrete pump, the concrete pouring compactness of the arch part is improved, and the subsequent backfilling grouting is not needed, so that the tunnel lining concrete construction efficiency is greatly improved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a bottom view of the connector and closure plate of fig. 1.
Fig. 4 is a schematic view of a closure plate in accordance with the present utility model.
Detailed Description
The following describes embodiments of the present utility model in detail with reference to the accompanying drawings, and the embodiments and specific operation procedures are given by the embodiments of the present utility model under the premise of the technical solution of the present utility model, but the scope of protection of the present utility model is not limited to the following embodiments.
It should be noted that in the description of the present utility model, relational terms such as "first" and "second", and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
In the description of the present utility model, the terms "coupled," "connected," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
1-3, the template structure suitable for the cast-in-place concrete lining of the tunnel comprises a steel template 1, an exhaust piece, a pair of bottom plate pouring windows 2, a pair of side wall pouring windows 3 and pouring holes formed in the top of the steel template 1, wherein the steel template 1 is supported in the tunnel along the length direction of the tunnel;
the steel template 1 and the excavation surface 4 of the tunnel are enclosed to form a lining pouring cavity 5 with an annular structure, an exhaust piece (namely an exhaust pipe 6) is vertically arranged at the central position of the bottom plate of the steel template 1, and the exhaust pipe 6 is communicated with the lining pouring cavity 5, so that the exhaust of concrete of the lining bottom plate is facilitated, and the pouring quality of the lining bottom plate is improved; the bottom plate pouring windows 2 are symmetrically arranged below the side of the steel template 1 so as to facilitate pouring of the lining bottom plate; the side wall pouring windows 3 are symmetrically arranged at the waist of the steel template 1, so that partial side walls of the lining are conveniently poured; the pouring hole is formed in the top of the steel template 1, concrete can be poured from the vault by using a concrete pump in a pressurizing mode, and the compactness of the lining top plate is improved. The exhaust pipe, the pouring window and the pouring hole are generally arranged in a group every 3-4 m along the length direction of the tunnel.
In order to avoid that concrete exceeds the height of the window and overflows from the window in the actual casting process, a sealing plate 7 with an arc-shaped structure is arranged at each window of the steel template 1, and the window is sealed by the sealing plate 7 when the concrete is cast to the height of the window. When actually installing, the sealing plate 7 can be connected with the steel template 1 through bolts, a pair of guide blocks with limit grooves can be installed on the steel template 1, the sealing plate is inserted into the guide blocks, and the sealing plate is pulled to realize the sealing and opening of the window so as to meet the concrete pouring requirement.
As can be seen from fig. 1, the bottom of the steel template 1 is horizontally arranged, the bottom of the steel template 1 is provided with a mounting opening 8 communicated with the lining casting cavity 5, and the exhaust part is an exhaust pipe 6 fixed on the mounting opening 8. When the lining bottom plate is poured, air bubbles in the concrete can be discharged through the vertically arranged exhaust pipe 6, so that the pouring quality of the lining bottom plate is improved.
In actual installation, the number of the exhaust pipes 6 can be one or two or more, so as to meet the exhaust requirements in the lining pouring process of tunnels with different lengths. For convenient installation, the exhaust pipe 6 and the installation opening 8 can be fixedly connected through insertion, and the exhaust pipe 6 and the installation opening 8 can also be in threaded connection.
As can be seen from fig. 2, the pouring hole of the steel template 1 is provided with a connector 9 with a step-shaped structure, the connector 9 is provided with an inner hole communicated with the lining pouring cavity 5. The concrete pressure pipe is connected with the connector 9 in a threaded manner, and concrete is poured into the upper part of the lining pouring cavity 5 by a concrete pump to form a top plate.
As can be seen from fig. 2 to fig. 4, a plugging plate 10 is horizontally inserted into the large-diameter section of the connector 9, and a through hole for communicating the lining casting cavity 5 with the concrete pressure pipe is formed at one end of the plugging plate 10. When the through hole of the plugging plate 10 moves into the connector 9, the connector 9 is in an open state so as to facilitate pouring concrete; when the through hole of the blocking plate 10 is moved out of the connection head 9, the other end portion of the blocking plate 10 seals the connection head 9 so as to facilitate the disassembly of the concrete pressure pipe.
The template structure of the utility model can realize the integral casting molding of tunnel lining, and is concretely as follows:
firstly, injecting concrete into a lining pouring cavity 5 through a bottom plate pouring window 2, wherein in the process, as the exhaust pipe 6 is arranged at the bottom center of the steel template 1, air bubbles in the concrete can be discharged through the exhaust pipe 6, and the pouring quality of the surface of the lining bottom plate is improved; closing the sealing plate 7 at the bottom plate pouring window 2 when the concrete pouring height reaches the bottom plate pouring window 2;
then, concrete is continuously injected into the lining pouring cavity 5 through the side wall pouring window 3, and when the concrete surface rises to the vicinity of the side wall pouring window 3, the side wall pouring window 3 is closed; the concrete pressurizing pipe is fixedly connected with the connector 9, the through hole of the plugging plate 10 is pumped to be concentric with the inner hole of the connector 9, concrete is injected from the top of the lining casting cavity 5 by means of a concrete pump, the concrete casting compactness of the vault part is remarkably improved, backfilling grouting is not needed, and the tunnel lining concrete construction efficiency is greatly improved;
after the pouring is finished, the plugging plate 10 is pulled to seal the connector 9, the condition that concrete inside the lining pouring cavity 5 overflows after the concrete pressure pipe is detached is avoided, the pouring operation of the tunnel lining is finished, the integral forming of the lining is realized, and the construction quality and the construction efficiency are greatly improved.
It should be emphasized that the above description is merely a preferred embodiment of the present utility model, and the present utility model is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some of the technical features described in the above embodiments by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (3)
1. The template structure comprises a steel template which is supported in the tunnel along the length direction of the tunnel, and a lining pouring cavity is formed by the steel template and the excavation surface of the tunnel; the method is characterized in that: the template structure further comprises an exhaust piece, at least one pair of bottom plate pouring windows, at least one pair of side wall pouring windows and pouring holes formed in the top of the steel template, wherein the exhaust piece is vertically arranged at the bottom of the steel template and is communicated with the lining pouring cavity; the bottom plate pouring windows are symmetrically arranged below the side of the steel template; the side wall pouring windows are symmetrically arranged at the waist of the steel template.
2. The formwork structure adapted for use in tunnel cast-in-place concrete lining of claim 1, wherein: the bottom plate of steel form is horizontal, set up on the bottom plate with the mounting mouth of lining up pouring cavity intercommunication, the exhaust piece is fixed for the blast pipe on the mounting mouth.
3. The formwork structure adapted for use in tunnel cast-in-place concrete lining of claim 1, wherein: the pouring hole is provided with a connector with a step-shaped structure and a large upper part and a small lower part, and the connector is fixedly connected with the concrete pressure pipe through a screw thread or a flange; and a plugging plate is inserted in the connector, and one end part of the plugging plate is provided with a through hole for communicating the concrete pressure pipe with the lining casting cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322418814.4U CN220621886U (en) | 2023-09-06 | 2023-09-06 | Template structure suitable for tunnel cast-in-place concrete lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322418814.4U CN220621886U (en) | 2023-09-06 | 2023-09-06 | Template structure suitable for tunnel cast-in-place concrete lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220621886U true CN220621886U (en) | 2024-03-19 |
Family
ID=90211806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322418814.4U Active CN220621886U (en) | 2023-09-06 | 2023-09-06 | Template structure suitable for tunnel cast-in-place concrete lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220621886U (en) |
-
2023
- 2023-09-06 CN CN202322418814.4U patent/CN220621886U/en active Active
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