Deep shaft supporting structure

Abstract

The utility model discloses a deep shaft supporting structure which comprises a first reinforcing structure, the first reinforcing structure comprises a reinforcing net laid on the inner wall of a shaft and a concrete layer sprayed on the reinforcing net, and the first reinforcing structure further comprises a first polymer waterproof bonding layer arranged between the concrete layer and the inner wall of the shaft. The supporting structure further comprises a second reinforcing structure for further reinforcing the inner wall of the vertical shaft. The supporting structure has the effect of further improving the stability of the vertical shaft.

Description

Technical Field

[0001] The present application relates to the technical field of support structures, and in particular to a deep shaft support structure. Background Art

[0002] With the acceleration of urbanization, shaft construction plays an increasingly important role in many fields. However, the promotion and application of deep shafts needs to focus on a series of problems caused by non-uniform horizontal confining pressure and high horizontal ground stress: under non-uniform horizontal ground stress conditions, the circular shaft cross-section structure will produce stress concentration in the direction of the minimum horizontal principal stress. Even if the short excavation and short masonry construction method is adopted, shear failure and rock wall collapse will usually occur for shafts with poor rock mass quality, threatening the safety of personnel during construction operations; under the action of high horizontal ground stress, severe impact ground pressure disasters such as rock bursts will occur, seriously affecting the progress and safety of shaft construction.

[0003] Normally, shaft support is provided by laying a single-piece steel mesh, on which concrete is sprayed to reinforce the shaft. However, in the case of adverse geological conditions such as faults and interlayer dislocation zones and a large shaft excavation section, the shaft wall may become unstable if the above-mentioned support method is used. Utility Model Content

[0004] In order to further improve the stability of the reinforced shaft, the present application provides a deep shaft support structure.

[0005] A deep shaft support structure provided in this application adopts the following technical solution:

[0006] A deep shaft support structure includes a first reinforcement structure, wherein the first reinforcement structure includes a reinforcement mesh laid on the inner wall of the shaft and a concrete layer sprayed on the reinforcement mesh, the first reinforcement structure also includes a first polymer waterproof bonding layer arranged between the concrete layer and the inner wall of the shaft, and the support structure also includes a second reinforcement structure for further reinforcing the inner wall of the shaft.

[0007] By adopting the above technical solution, the present application further reinforces the concrete layer by setting a first polymer waterproof bonding layer between the concrete layer and the inside of the shaft, thereby improving the stability of the inner wall of the shaft. The first polymer waterproof bonding layer also has a waterproof effect, reducing the impact of water seepage in the soil layer on the concrete layer. The present application also sets a second reinforcement structure on the inner wall of the shaft to further improve the stability of the inner wall of the shaft.

[0008] Optionally, the second reinforcement structure includes a steel cage connected to the concrete layer and anchor rods that sequentially pass through the steel cage and the first reinforcement structure and are inserted into the soil, and the steel cages are provided in plurality and are sequentially connected end to end.

[0009] By adopting the above technical solution, the present application reinforces the concrete layer through steel cages and anchor rods, and the reinforcement effect is good. In addition, the first reinforcement structure is formed by connecting multiple steel cages end to end, which is convenient to install.

[0010] Optionally, the steel cage includes a plurality of circumferentially arranged vertical steel bars, a bottom ring fixedly connected to the bottom end of the vertical steel bars, a top ring fixedly connected to the top end of the vertical steel bars, and a reinforcement ring fixedly connected to the middle of the vertical steel bars.

[0011] By adopting the above technical solution, the bottom ring and the top ring of the steel cage can fix the vertical steel bars on the one hand, and also facilitate the connection of two adjacent steel cages on the other hand.

[0012] Optionally, the vertical cross-section of the top ring is L-shaped, and the bottom ring is inserted into the L-shaped groove of the top ring.

[0013] By adopting the above technical solution, the bottom ring is inserted into the L-shaped groove of the top ring, and the positions of two adjacent steel cages are fixed, which is convenient for assembling the steel cages, and the steel cages can be separated for subsequent recycling.

[0014] Optionally, the top ring is fixedly connected to the adjacent bottom ring via the anchor rod.

[0015] By adopting the above technical solution, the anchor rods further fix two adjacent steel cages, making the steel cages more stable.

[0016] Optionally, a positioning block is further provided in the middle of the vertical reinforcement bar, the reinforcement ring abuts against the positioning block, and the reinforcement ring and the vertical reinforcement bar are fixedly connected via the anchor rod.

[0017] By adopting the above technical solution, the positioning block can assist in positioning the reinforcement ring, making it easier to fix the reinforcement ring and the vertical reinforcement bar.

[0018] Optionally, the first reinforcement structure further includes a second polymer waterproof bonding layer disposed between the concrete layer and the steel cage.

[0019] By adopting the above technical solution, the second polymer waterproof bonding layer can strengthen the connection between the concrete layer and the steel cage, and can further reduce the impact of water seepage in the soil layer on the concrete layer.

[0020] Optionally, the anchor rod is a grouting anchor rod.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The present application further reinforces the concrete layer and improves the stability of the inner wall of the shaft by setting a first polymer waterproof bonding layer between the concrete layer and the interior of the shaft. The first polymer waterproof bonding layer also has a waterproof effect, reducing the impact of water seepage in the soil layer on the concrete layer. The present application also sets a second reinforcement structure on the inner wall of the shaft to further improve the stability of the inner wall of the shaft.

[0023] 2. The present application uses steel cages and anchor rods to reinforce the concrete layer, and the reinforcement effect is good. In addition, the first reinforcement structure is formed by connecting multiple steel cages end to end, which is convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0025] Figure 2 is a schematic diagram showing the structure of a steel cage in an embodiment of the present application;

[0026] Figure 3 It is a schematic structural diagram showing the connection between the top ring and the bottom ring according to an embodiment of the present application.

[0027] In the figure, 1, the first reinforcement structure; 11, the reinforcement mesh; 2, the second reinforcement structure; 21, the steel cage; 211, the vertical steel bar; 212, the bottom ring; 213, the top ring; 214, the reinforcement ring; 22, the anchor rod; 3, the positioning block. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] An embodiment of the present application discloses a deep shaft support structure.

[0030] like Figure 1 As shown, a deep shaft support structure includes a first reinforcement structure 1 and a second reinforcement structure 2, the second reinforcement structure 2 is located inside the first reinforcement structure 1, the first reinforcement structure 1 includes a reinforcement mesh 11 laid on the inner wall of the shaft, a concrete layer sprayed on the reinforcement mesh 11 and the inner wall of the shaft (not shown in the figure), a first polymer waterproof bonding layer arranged between the concrete layer and the inner wall of the shaft (not shown in the figure), and a second polymer waterproof bonding layer arranged between the concrete layer and the second reinforcement structure 2 (not shown in the figure).

[0031] The present application further reinforces the concrete layer and improves the stability of the inner wall of the shaft by setting a first polymer waterproof bonding layer between the concrete layer and the inner wall of the shaft. The first polymer waterproof bonding layer also has a waterproof effect, reducing the impact of water seepage in the soil layer on the concrete layer. The present application also sets a second reinforcement structure 2 on the inner wall of the shaft to further improve the stability of the inner wall of the shaft. The second polymer waterproof bonding layer can strengthen the connection between the concrete layer and the second reinforcement structure 2, and can further reduce the impact of water seepage in the soil layer on the concrete layer.

[0032] like Figure 1 and Figure 2 As shown, the second reinforcement structure 2 includes a steel cage 21 and a grouting anchor rod 22. The steel cage 21 is provided in plurality and connected end to end in sequence. The grouting anchor rod 22 passes through the steel cage 21 and the first reinforcement structure 1 in sequence and is inserted into the soil. The steel cage 21 includes a plurality of annularly arranged vertical steel bars 211, a bottom ring 212 fixedly connected to the bottom end of the vertical steel bar 211, a top ring 213 fixedly connected to the top end of the vertical steel bar 211, and a reinforcing ring 214 fixedly connected to the middle of the vertical steel bar 211. Figure 2 and Figure 3 As shown, the vertical section of the top ring 213 is L-shaped, the bottom ring 212 is inserted into the L-shaped groove of the top ring 213 , and the top ring 213 is fixedly connected to the adjacent bottom ring 212 through the grouting anchor rod 22 .

[0033] Insert the bottom ring 212 into the L-shaped groove of the top ring 213, and the positions of two adjacent steel cages 21 are fixed, which is convenient for installation. The steel cages 21 can be separated for subsequent recycling. The anchor rods 22 further fix the two adjacent steel cages 21, making the steel cages 21 more stable.

[0034] like Figure 2 and Figure 3 As shown, a positioning block 3 is further provided in the middle of the vertical reinforcement bar 211 , and a reinforcement ring 214 is placed on the positioning block 3 . The reinforcement ring 214 is fixedly connected to the vertical reinforcement bar 211 through a grouting anchor rod 22 .

[0035] The positioning block 3 can assist in positioning the reinforcement ring 214 , and facilitate fixation of the reinforcement ring 214 and the vertical reinforcement bar 211 .

[0036] The implementation principle of a deep shaft support structure in an embodiment of the present application is as follows: when the deep shaft needs to be reinforced, a first polymer waterproof adhesive layer is coated on the inner wall of the shaft, and then a reinforcement mesh 11 is laid on the inner wall of the shaft, concrete is sprayed on the reinforcement mesh 11 and the inner wall of the shaft, and the concrete is cured. A second polymer waterproof adhesive layer is coated on the concrete layer, and a steel cage 21 is placed in the shaft, connected end to end, and fixed by a grouting anchor rod 22, and the deep shaft support structure is installed.

[0037] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A deep shaft support structure, comprising a first reinforcement structure (1), wherein the first reinforcement structure (1) comprises a reinforcement mesh (11) laid on the inner wall of the shaft and a concrete layer sprayed on the reinforcement mesh (11), characterized in that: The first reinforcement structure (1) further comprises a first polymer waterproof bonding layer arranged between the concrete layer and the inner wall of the shaft, and the supporting structure further comprises a second reinforcement structure (2) for further reinforcing the inner wall of the shaft.

2. A deep shaft support structure according to claim 1, characterized in that: The second reinforcement structure (2) comprises a steel cage (21) connected to the concrete layer and an anchor rod (22) which passes through the steel cage (21) and the first reinforcement structure (1) in sequence and is inserted into the soil. The steel cage (21) is provided in plurality and is connected end to end in sequence.

3. A deep shaft support structure according to claim 2, characterized in that: The steel cage (21) comprises a plurality of circumferentially arranged vertical steel bars (211), a bottom ring (212) fixedly connected to the bottom ends of the vertical steel bars (211), a top ring (213) fixedly connected to the top ends of the vertical steel bars (211), and a reinforcement ring (214) fixedly connected to the middle of the vertical steel bars (211).

4. A deep shaft support structure according to claim 3, characterized in that: The vertical cross section of the top ring (213) is L-shaped, and the bottom ring (212) is inserted into the L-shaped groove of the top ring (213).

5. A deep shaft support structure according to claim 4, characterized in that: The top ring (213) is fixedly connected to the adjacent bottom ring (212) via the anchor rod (22).

6. A deep shaft support structure according to claim 3, characterized in that: A positioning block (3) is also provided in the middle of the vertical reinforcement bar (211), the reinforcement ring (214) is in contact with the positioning block (3), and the reinforcement ring (214) and the vertical reinforcement bar (211) are fixedly connected via the anchor rod (22).

7. A deep shaft support structure according to claim 2, characterized in that: The first reinforcement structure (1) further comprises a second polymer waterproof bonding layer provided between the concrete layer and the steel cage (21).

8. A deep shaft support structure according to claim 2, characterized in that: The anchor rod (22) is a grouting anchor rod (22).

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