CN216894390U - Large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions - Google Patents
Large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions Download PDFInfo
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- CN216894390U CN216894390U CN202121245647.2U CN202121245647U CN216894390U CN 216894390 U CN216894390 U CN 216894390U CN 202121245647 U CN202121245647 U CN 202121245647U CN 216894390 U CN216894390 U CN 216894390U
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- diameter shaft
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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
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Abstract
The utility model relates to a large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions. The technical scheme of the utility model is as follows: the utility model provides a supporting construction is strengthened to major diameter shaft under unfavorable geological conditions for the support of major diameter shaft under the unfavorable geological conditions has the shaft wall of a well that the excavation was accomplished, its characterized in that: the mortar anchor rod for system support is fixedly mounted on the vertical shaft well wall, a first concrete layer, a second concrete layer and a third concrete layer are sequentially paved on the vertical shaft well wall, a reinforcing mesh is arranged between the first concrete layer and the second concrete layer, a steel support structure is arranged between the second concrete layer and the third concrete layer, and the steel support structure is fixedly connected to the mortar anchor rod. The utility model is suitable for the large-diameter shaft support category under unfavorable geological conditions.
Description
Technical Field
The utility model relates to a large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions. The method is suitable for the large-diameter shaft support category under unfavorable geological conditions.
Background
In the condition that the hydropower station plant is arranged underground, a plurality of vertical shafts are required to be arranged for the requirements of air inlet and exhaust, electricity sending and the like of the underground plant, such as an air inlet vertical shaft, an air exhaust vertical shaft, an outlet vertical shaft and the like. Under the condition of poor geological conditions including faults, interlaminar dislocation zones and the like and under the condition that the excavation section of the vertical shaft is large, the wall of the vertical shaft can be unstable under the common spray anchor support, and at the moment, the wall of the vertical shaft needs to be reinforced and supported to ensure the stability of surrounding rocks of the wall of the vertical shaft.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the problem that the shaft wall support is unstable under the unfavorable geological conditions including faults, interlayer dislocation zones and the like is not solved, and the large-diameter shaft reinforcing support structure is stably applicable to the unfavorable geological conditions.
The technical scheme adopted by the utility model is as follows: the utility model provides a supporting construction is strengthened to major diameter shaft under unfavorable geological conditions for the strut of major diameter shaft under the unfavorable geological conditions has the shaft wall of a well that the excavation was accomplished, its characterized in that: the system comprises a shaft well wall, a first concrete layer, a second concrete layer and a third concrete layer are sequentially paved on the shaft well wall, a reinforcing mesh is arranged between the first concrete layer and the second concrete layer, a steel supporting structure is arranged between the second concrete layer and the third concrete layer, and the steel supporting structure is fixedly connected to the mortar anchor rod.
Preferably, the steel supporting structure is provided with a first longitudinal steel bar, a second longitudinal steel bar, annular steel arches and annular steel bars, the first longitudinal steel bar is uniformly installed on the second concrete layer, the plurality of annular steel arches are uniformly arranged on the first longitudinal steel bar along the direction of the longitudinal steel bar, the plurality of second longitudinal steel bars are uniformly installed on the inner side of the annular steel arches, and the plurality of annular steel bars are uniformly installed on the second longitudinal steel bar.
Preferably, a plurality of L-shaped lacing wires for supporting the annular steel arch are arranged below the annular steel arch, the bottom surface of each L-shaped lacing wire is welded with the mortar anchor rod, and the side surface of each L-shaped lacing wire is welded with the outer longitudinal steel bar.
Preferably, the annular reinforcing frame is provided with a plurality of I-shaped steels and connecting steel plates, the two ends of each I-shaped steel are respectively welded with one connecting steel plate, two adjacent connecting steel plates between the two I-shaped steels are fixedly connected through bolts, and the plurality of I-shaped steels form the annular steel arch frame through the fixedly connected connecting steel plates.
The utility model has the beneficial effects that: the first concrete layer, the second concrete layer and the third concrete layer are paved in the shaft wall of the vertical shaft, and a reinforcing mesh which enables the concrete layers to be connected stably is arranged between the concrete layers to strengthen the concrete supporting strength on the shaft wall of the two vertical shafts. The steel supporting structure is additionally arranged between the second concrete layer and the third concrete layer, the steel supporting structure is fixedly connected to the mortar anchor rod, and the steel supporting structure is fixedly installed on the concrete layer, so that the stability of the large-diameter shaft well wall surrounding rock under unfavorable geological conditions is enhanced.
Drawings
FIG. 1 is a longitudinal sectional view of the present invention.
Figure 2 is a cross-sectional view of the overall structure of the present invention.
Fig. 3 is a detailed cross-sectional view of the circumferential steel arch of the present invention.
FIG. 4 is a detailed longitudinal cross-sectional view of the circumferential steel arch of the present invention.
Fig. 5 is a detailed view of the connecting steel plate of the present invention.
In the figure: 1. the concrete structure comprises a vertical shaft well wall, 2 a mortar anchor rod, 3 a first concrete layer, 4 a reinforcing mesh, 5 a second concrete layer, 6 a first longitudinal steel bar, 7a circumferential steel arch frame, 7a I-shaped steel, 7b a connecting steel plate, 7c a bolt, 7d an L-shaped lacing wire, 8 a second longitudinal steel bar, 9 a circumferential steel bar, 10 a third concrete layer.
Detailed Description
The embodiment is a large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions, and is provided with a shaft wall after excavation is completed.
In this embodiment, a mortar anchor rod for system support is fixedly installed on the wall of the vertical shaft well, and the mortar anchor rod needs to extend 450mm into the wall of the vertical shaft well.
In this embodiment, a first concrete layer, a second concrete layer and a third concrete layer are sequentially laid on the wall of the shaft well, a reinforcing mesh is arranged between the first concrete layer and the second concrete layer, a steel supporting structure is arranged between the second concrete layer and the third concrete layer, and the steel supporting structure is fixedly connected to the mortar anchor rod. First concrete layer, second concrete layer and third concrete layer all adopt C28 concrete to spout the dress, first concrete layer thickness is 50mm, second concrete layer thickness is 100mm, third concrete layer thickness is 300 mm. Thus, the mortar anchor rod can be completely covered in the concrete.
In this embodiment, the reinforcing mesh installed in the first concrete layer and the second concrete layer has a diameter of
The reinforcing mesh.
In this embodiment, the steel supporting structure has first longitudinal steel bar, second longitudinal steel bar, hoop steel bow member and hoop reinforcing bar, first longitudinal steel bar is evenly installed on second concrete layer, and C28 reinforcing bar is chooseed for use to first longitudinal steel bar, and the interval between two first longitudinal steel bars is 600 mm. A plurality of annular steel arch frames are uniformly arranged on the first longitudinal steel bar along the direction of the longitudinal steel bar, and the distance between the two annular steel arch frames is 600 mm. A plurality of second longitudinal steel bars are evenly installed on the inner side of the annular steel arch frame, the second longitudinal steel bars are C28 steel bars, and the distance between the two second longitudinal steel bars is 600 mm. Evenly install a plurality of rings to reinforcing bar on second longitudinal reinforcement, C28 reinforcing bar is chooseed for use to the ring reinforcing bar, and the interval between two rings to reinforcing bar is 300 mm.
In this embodiment, hoop steel arch frame below is equipped with a plurality of L shape lacing wires that are used for supporting hoop steel arch frame, L shape lacing wire bottom surface with the welding of mortar anchor rod, L shape lacing wire side and the welding of outside longitudinal reinforcement, C28 reinforcing bar is chooseed for use to L shape lacing wire.
In this embodiment, the hoop reinforcement frame has a plurality of i-beams and connecting steel plates, one connecting steel plate is welded at each end of each i-beam, two adjacent connecting steel plates between two i-beams are fixedly connected through bolts, and the hoop reinforcement frame is formed by the plurality of i-beams through the fixedly connected connecting steel plates. The I-shaped steel is I16I-shaped steel, and the length of a single I-shaped steel is not more than 9 m.
The construction principle of this embodiment is: and in the excavated shaft wall of the vertical shaft, a mortar anchor rod is adopted to carry out system support on the shaft wall of the vertical shaft. After the mortar anchor rod is installed, primarily spraying concrete to the wall of the shaft well to form a first concrete layer, installing a reinforcing mesh on the completed first concrete layer, and spraying concrete again to form a second concrete layer. First longitudinal steel bars are evenly distributed along a formed second concrete layer, an annular steel arch is installed on the first longitudinal steel bars and is formed by connecting a plurality of I-shaped steels and connecting steel plates, two ends of each I-shaped steel are respectively welded with one connecting steel plate, and the two connecting steel plates are fixedly connected through bolt connection, so that the two I-shaped steels are sequentially connected. And a plurality of L-shaped lacing wires are fixedly welded at the lower end of the annular steel arch frame, the L-shaped lacing wires are fixedly welded on the mortar anchor rod, and second longitudinal steel bars are fixedly welded on the side surfaces of the L-shaped lacing wires. And uniformly and fixedly mounting the circumferential steel bars on a ring formed by the plurality of second longitudinal steel bars. After the steel supporting structure is completed, concrete is sprayed on the second concrete layer again to form a third concrete layer, and the mortar anchor rods and the steel supporting structure are completely covered in the concrete.
Claims (4)
1. The utility model provides a supporting construction is strengthened to major diameter shaft under unfavorable geological conditions for the support of major diameter shaft under the unfavorable geological conditions has the shaft wall of a well that the excavation was accomplished, its characterized in that: the system comprises a shaft well wall, a first concrete layer, a second concrete layer and a third concrete layer are sequentially paved on the shaft well wall, a reinforcing mesh is arranged between the first concrete layer and the second concrete layer, a steel supporting structure is arranged between the second concrete layer and the third concrete layer, and the steel supporting structure is fixedly connected to the mortar anchor rod.
2. The reinforced supporting structure for the large-diameter shaft under the unfavorable geological condition, which is characterized in that: the steel supporting structure is provided with first longitudinal steel bars, second longitudinal steel bars, annular steel arches and annular steel bars, wherein the first longitudinal steel bars are uniformly installed on the second concrete layer, the first longitudinal steel bars are uniformly provided with the plurality of annular steel arches along the direction of the longitudinal steel bars, the plurality of second longitudinal steel bars are uniformly installed on the inner sides of the annular steel arches, and the plurality of annular steel bars are uniformly installed on the second longitudinal steel bars.
3. The reinforced supporting structure for the large-diameter shaft in the unfavorable geological condition, which is disclosed by the claim 2, is characterized in that: and a plurality of L-shaped lacing wires for supporting the annular steel arch are arranged below the annular steel arch, the bottom surface of each L-shaped lacing wire is welded with the mortar anchor rod, and the side surface of each L-shaped lacing wire is welded with the outer longitudinal steel bar.
4. The reinforced supporting structure for the large-diameter shaft in the unfavorable geological condition, which is disclosed by the claim 2, is characterized in that: the annular steel bar frame is provided with a plurality of I-shaped steels and connecting steel plates, one connecting steel plate is welded at each of two ends of each I-shaped steel, two adjacent connecting steel plates between the two I-shaped steels are fixedly connected through bolts, and the annular steel arch frame is formed by the connecting steel plates fixedly connected through the plurality of I-shaped steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121245647.2U CN216894390U (en) | 2021-06-04 | 2021-06-04 | Large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121245647.2U CN216894390U (en) | 2021-06-04 | 2021-06-04 | Large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216894390U true CN216894390U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121245647.2U Active CN216894390U (en) | 2021-06-04 | 2021-06-04 | Large-diameter shaft reinforcing and supporting structure under unfavorable geological conditions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216894390U (en) |
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2021
- 2021-06-04 CN CN202121245647.2U patent/CN216894390U/en active Active
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