Supporting structure based on integration of anchor rods and micro piles

Abstract

The utility model relates to the technical field of geotechnical engineering and tunnel supporting, in particular to an anchor rod and micro pile integration-based supporting structure, which comprises a micro pile main body and a plurality of anchor rod main bodies movably connected to the micro pile main body, an angle adjusting mechanism used for adjusting the angle of the anchor rod body is arranged between the anchor rod body and the micro pile body. The angle adjusting mechanism comprises two supports detachably connected with the micro pile body, one support is movably connected with a first hoop, and the other support is movably connected with a second hoop through a support assembly. The bracket assembly comprises a screw rod, and a first bracket, a second bracket, a third bracket and a fourth bracket which are sequentially hinged end to end; a threaded hole corresponding to the screw rod is formed in a hinged shaft of the first bracket and the second bracket; a through hole matched with the screw rod is formed in a hinged shaft of the third support and the fourth support.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of geotechnical engineering and tunnel supporting technology, especially to a supporting structure based on the integration of anchor rod and micro pile. BACKGROUND

[0002] The stability of the tunnel entrance slope is a problem that must be focused on in tunnel engineering. Due to the complex geological conditions in the tunnel entrance area, such as weak rock-soil mass, joint fissure development, the existence of sliding zone or other unstable structures, it is extremely susceptible to external load, rainfall or groundwater changes, leading to instability, sliding or collapse. These problems not only threaten construction and operation safety, but also greatly increase the cost of engineering maintenance. Therefore, the supporting design for the tunnel entrance slope is particularly important.

[0003] At present, the common supporting methods for the tunnel entrance slope mainly include anchor rod support, pile foundation support and retaining wall structures. Although these traditional supporting techniques can meet the requirements of slope stability under certain conditions, their effectiveness is often limited in complex geological conditions: ① Limitations of anchor rod support: single anchor rod support is prone to insufficient anchoring force or failure in soft rock-soil mass due to limited anchoring range. In addition, traditional anchor rods are usually designed as straight rods with single stress direction, which cannot effectively disperse external loads, leading to local stress concentration in rock-soil mass and easy local damage. ② Insufficient adaptability of pile foundation support: pile foundation support can provide strong vertical bearing capacity, but it is insufficient for lateral stability and anti-overturning performance of the slope. Moreover, the lack of overall synergy between the separate pile foundation structure and the tunnel main support system makes it difficult to achieve comprehensive stable support effect. ③ Construction limitations of traditional supporting structures: slope support engineering usually needs to be flexibly adjusted according to specific geological conditions, while traditional supporting structures are difficult to meet the supporting needs in complex geological environments due to their single design form.

[0004] In order to solve these problems, some improved techniques have been proposed in recent years, such as the combined support system combining anchor rods and pile foundations. However, these techniques still have the following shortcomings in practical application:

[0005] The structural design fails to fully combine the characteristics of the tunnel main body, the supporting effect is limited to slope stability, and the anti-overturning performance of the tunnel is not significantly improved; lack of flexibility and adjustability, unable to adapt to changing construction site conditions; the anchoring system and the supporting structure are not closely connected, with poor overall synergy. SUMMARY

[0006] The utility model provides a kind of supporting structure based on anchor rod and micro pile integration, one aspect, by support assembly, the angle of anchor rod main body can be flexibly adjusted according to specific geological conditions and engineering needs;The other side, flexible loading and unloading of structure is realized by support.

[0007] To achieve the above object, the technical scheme that the utility model adopts is:

[0008] The utility model provides a kind of supporting structure based on anchor rod and micro pile integration, including micro pile main body and multiple anchor rod main bodies movably connected on micro pile main body;Angle adjusting mechanism for adjusting the angle of anchor rod main body is arranged between anchor rod main body and micro pile main body.

[0009] Further, the angle adjusting mechanism includes two supports that are detachably connected with the micro pile main body, one of the supports movably connects a first hoop, and the other support movably connects a second hoop through a support assembly.

[0010] Further, the support assembly includes a screw rod, a first support, a second support, a third support and a fourth support sequentially hinged at the head and tail, the hinged shaft of the first support and the second support is provided with a threaded hole corresponding to the screw rod, and the hinged shaft of the third support and the fourth support is provided with a through hole matched with the screw rod.

[0011] Further, the hinged shaft of the second support and the third support is rotatably connected with a C-shaped block, and the second hoop is hinged with the C-shaped block.

[0012] Further, the screw rod is provided with a limiting piece at both ends, and the limiting piece close to the through hole is rotatably connected with the hinged shaft of the third support and the fourth support.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The support assembly can flexibly adjust the angle of the anchor rod main body according to the specific geological conditions and engineering needs, improving the adaptability and stability of the supporting structure. This design allows accurate adjustment of the angle and position of the anchor rod for different geological conditions, avoids waste of materials, and realizes effective use of resources.

[0015] 2. The close connection between the components increases the stability and safety of the entire supporting structure. Precise angle adjustment capability helps to improve the supporting effect and reduce engineering hazards caused by improper support, thereby improving the overall engineering quality.

[0016] 3. Through the foundation bearing effect of micro piles and the multi-point anchoring effect of branch anchors, the system forms a high-efficiency surrounding support structure in the tunnel entrance area, which not only disperses the stress concentration of rock-soil mass, but also provides overall collaborative support for the tunnel and the slope. In addition, the design has high flexibility, and can adjust the micro pile spacing, anchor angle and branch arrangement according to the geological conditions, has strong adaptability and remarkable supporting effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and other related drawings can also be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0018] Figure 1 is a structural schematic view of the present application;

[0019] Figure 2 is a structural schematic view of the support structure in the present application;

[0020] Figure 3 is a structural schematic view of the micro pile body in the present application;

[0021] Figure 4 is a structural schematic view of the support assembly in the present application;

[0022] Figure 5 is a structural schematic view of the fourth support in the present application.

[0023] In the figure: 1-micro pile body; 2-anchor body; 3-support assembly; 31-screw rod; 32-first support; 33-second support; 34-third support; 35-fourth support; 36-limiting piece; 4- support; 5-first hoop; 6-second hoop; 7-C block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments, not all the embodiments.

[0025] In the description of the utility model, it needs to be understood that the terms "front", "back", "left", "right", "up", "down", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0026] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "setting", "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Combining Figures 1-5 As shown in the utility model provides a kind of support structure based on anchor rod and micro pile integration, including micro pile main body 1, and multiple movable connection in micro pile main body 1 on anchor rod main body 2;The angle adjusting mechanism for adjusting the angle of the anchor rod main body 2 is arranged between the anchor rod main body 2 and the micro pile main body 1.

[0028] Micro pile main body 1 provides support force, and branch anchor rod main body 2 is dispersed in soil or rock stratum by multi-point anchoring stress, and micro pile main body 1 and anchor rod main body 2 are connected together by support assembly 3, so that anchor rod main body 2 can adjust angle, and support assembly 3 is provided with self-locking structure, to form an efficient, stable support system. Anchor rod main body 2 can be adjusted between 15 ° to 30 °, so that the maximum anchoring effect of anchor rod in rock-soil body can be ensured. Micro pile main body 1 is usually selected from high-strength concrete or steel material, to ensure sufficient bearing capacity and durability, and anchor rod main body 2 is generally made of prestressed steel bar or other high-strength alloy material, to ensure good tensile property.

[0029] Further, the angle adjusting mechanism includes two supports 4 detachably connected with the micro pile main body 1, one of the supports 4 is movably connected with a first hoop 5, and the other support 4 is movably connected with a second hoop 6 through the support assembly 3.

[0030] The support 4 is a prior art, and the application will not be described in detail. The support 4 can be used to adjust the tightness, and can also be used to rotate on the micro pile body 1 to further adjust the angle of the anchor rod body 2. The number of the angle adjusting assemblies can be set according to the needs, and the angle adjusting assemblies can realize quick connection of the anchor rod body 2. The sizes of the first and second hoops 5 and 6 are set according to the size of the anchor rod body 2 used.

[0031] Further, the support assembly 3 comprises a screw rod 31, and first, second, third and fourth supports 32, 33, 34 and 35 connected in sequence; the hinge shafts of the first and second supports 32 and 33 are provided with threaded holes corresponding to the screw rod 31; the hinge shafts of the third and fourth supports 34 and 35 are provided with through holes matched with the screw rod 31.

[0032] Specifically, the hinge shafts of the first and second supports 32 and 33 can be referred to as upper hinge shafts, the hinge shaft between the second and third supports 33 and 34 can be referred to as a right hinge shaft, the hinge shaft between the third and fourth supports 34 and 35 can be referred to as a lower hinge shaft, and the hinge shaft between the fourth and first supports 35 and 32 can be referred to as a left hinge shaft. Each hinge shaft is provided with a limiting assembly to prevent the support from falling off. In use, the threaded hole is matched with the screw rod 31, the threaded hole is moved by rotating the screw rod 31, the angle between the third and fourth supports 34 and 35 can be changed, and accordingly, the angle between the first and second supports 32 and 33 also changes, that is, the angle adjustment between the anchor rod body 2 and the micro pile body 1 is realized.

[0033] Further, the hinge shafts of the second and third supports 33 and 34 are rotatably connected with C-shaped blocks 7; the second hoop 6 is hingedly connected with the C-shaped blocks 7. The first hoop 5 is also movably connected with the support 4 through the C-shaped blocks 7.

[0034] Further, the screw rod 31 is provided with a limiting piece 36 at each end, and the limiting piece 36 close to the through hole is rotatably connected with the hinge shafts of the third and fourth supports 34 and 35. When the screw rod 31 is rotated, the end of the screw rod 31 in the through hole does not displace.

[0035] Working principle: when the angle between the anchor rod body 2 and the micro pile body 1 needs to be increased, the screw rod 31 is only needed to be rotated counterclockwise, and during the rotation process, the upper and lower hinge shafts move towards each other, the distance between them gradually decreases, and the distance between the left and right hinge shafts gradually increases. At this time, the anchor rod body 2 will rotate away from the micro pile body 1. When the angle between the anchor rod body 2 and the micro pile needs to be reduced, the screw rod 31 is only needed to be rotated clockwise, and during the rotation process, the upper and lower hinge shafts move away from each other, the distance between them gradually increases, and the distance between the left and right hinge shafts gradually decreases. At this time, the anchor rod body 2 will rotate towards the micro pile body 1.

[0036] Specific application cases

[0037] A supporting structure based on the integration of anchor rods and micro piles, which ensures the stability of the surrounding soil and rock and reduces the impact on the surface buildings during the construction process of tunnel excavation or underground parking facilities.

[0038] The application provides a supporting structure based on the integration of anchor rods and micro piles.

[0039] Firstly, the construction site needs to be explored in detail to understand the geological conditions and determine the specific arrangement scheme of the supporting structure.

[0040] Assemble the micro pile body 1, the support 4, the first hoop 5, the support assembly 3 and the second hoop 6.

[0041] Drive the micro pile body 1, and then connect the anchor rod body 2 through the first hoop 5 and the second hoop 6; the angle of the anchor rod body 2 can be changed by rotating the screw rod 31.

[0042] When the angle between the anchor rod body 2 and the micro pile body 1 needs to be increased, the screw rod 31 is only needed to be rotated counterclockwise, and when the angle between the anchor rod body 2 and the micro pile needs to be reduced, the screw rod 31 is only needed to be rotated clockwise.

[0043] In summary, although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A supporting structure based on the integration of anchor rods and micro piles, comprising a micro pile body (1) and a plurality of anchor rod bodies (2) movably connected to the micro pile body (1); characterized in that, an angle adjusting mechanism for adjusting the angle of the anchor rod body (2) is arranged between the anchor rod body (2) and the micro pile body (1).

2. The support structure based on the integration of anchor rods and micro piles according to claim 1, characterized in that, The angle adjusting mechanism comprises two supports (4) which are detachably connected to the micro pile body (1), one of the supports (4) is movably connected with a first hoop (5), and the other support (4) is movably connected with a second hoop (6) through a support assembly (3).

3. The support structure based on the integration of micropiles and anchors according to claim 2, characterized in that, The support assembly (3) comprises a screw rod (31), and a first support (32), a second support (33), a third support (34) and a fourth support (35) which are sequentially hinged; a threaded hole corresponding to the screw rod (31) is formed on the hinge shaft of the first support (32) and the second support (33); a through hole matched with the screw rod (31) is formed on the hinge shaft of the third support (34) and the fourth support (35).

4. The support structure based on the integration of micropiles and anchors according to claim 3, characterized in that, A C-shaped block (7) is rotatably connected to the hinge shaft of the second support (33) and the third support (34); the second hoop (6) is hinged to the C-shaped block (7).

5. The support structure based on the integration of micropiles and anchors according to claim 4, characterized in that, Limiting pieces (36) are arranged at both ends of the screw rod (31), and the limiting piece (36) close to the through hole is rotatably connected to the hinge shaft of the third support (34) and the fourth support (35).

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