Weak structural plane filling treatment structure

Abstract

The utility model discloses a weak structural plane filling treatment structure, and relates to the technical field of weak structural plane treatment. The structure comprises a prefabricated filling body and a pre-stressed anchor rod, the prefabricated filling body is filled in the surrounding rock trapezoidal groove and comprises an upper filling body, a lower filling body and a wedge-shaped block, and the wedge-shaped block is filled between the upper filling body and the lower filling body; the pre-stressed anchor rods are driven into the prefabricated filling body and the surrounding rock in an X-shaped crossing mode. The bearing capacity of the surrounding rock is improved through the design of the prefabricated filling body, the prefabricated filling body isolates the weak structural surface from external water vapor, and the weak structural surface is prevented from being softened and argillized when encountering water to a certain extent; meanwhile, the prefabricated filling body is designed to be trapezoid, so that surrounding rock is prevented from being extruded out due to pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of soft structural surface treatment, in particular to a soft structural surface filling treatment structure. Background Art

[0002] A weak structural surface refers to a surface or zone in a rock mass whose mechanical strength is significantly lower than that of the surrounding rocks, and is usually filled with a certain thickness of weak materials, such as mud, broken rocks, etc. These structural surfaces may be formed due to fault activity, weathering, sedimentation, etc. in geological history, and have an important influence on the stability and mechanical behavior of the rock mass. Since the strength and stiffness of weak structural surfaces are usually lower than those of the surrounding rocks, they can become weak links in the mechanical failure of the rock mass. Under the influence of geological loads or engineering activities, weak structural surfaces may slide or open, causing deformation of the rock mass. In engineering construction, such as tunnels, shafts, dam foundations, slopes, etc., weak structural surfaces may cause engineering geological problems, and special attention should be paid to their impact on engineering stability.

[0003] At present, there are various ways to treat weak structural surfaces in engineering, the main purpose of which is to improve the stability and bearing capacity of the rock mass and reduce or prevent the occurrence of geological disasters. Common ways to treat weak structural surfaces are: 1. Install anchor rods in the weak structural surface and use the tension of the anchor rods to improve the stability of the rock mass. However, traditional support methods are difficult to adapt to the deformation characteristics of weak structural surfaces, especially weak structural surfaces with a high proportion of clay minerals in the composition. If the problem of softening and mudification of weak structural surfaces when exposed to water is not solved, the support effect will be greatly reduced. 2. Surface spraying of weak structural surfaces to form a protective layer, by isolating the weak structural surface from contact with the water vapor in the roadway to prevent the softening and mudification of the weak structural surface, enhance the integrity of the rock and soil body, and maintain the bearing capacity of the surrounding rock of the roadway, but this method will greatly reduce the control effect of the spraying layer as the weak structural surface is deformed and damaged under stress. In summary, the existing treatment methods for weak structural surfaces are not effective and it is difficult to achieve long-term stable control. Utility Model Content

[0004] In view of the above problems, the utility model discloses a filling and management structure for weak structural surfaces. The bearing capacity of the surrounding rock is improved through the design of a prefabricated filling body. The prefabricated filling body isolates the weak structural surface from the contact with external water vapor and avoids the softening and mudification of the weak structural surface when it comes into contact with water to a certain extent. At the same time, the prefabricated filling body is designed to be trapezoidal to prevent the surrounding rock from being compressed and squeezing out the prefabricated filling body.

[0005] According to the purpose of the utility model, a weak structural surface filling and management structure is proposed, including a prefabricated filling body and prestressed anchor rods; the prefabricated filling body is filled in a trapezoidal groove of the surrounding rock, including an upper filling body, a lower filling body and a wedge block, and the wedge block is filled between the upper filling body and the lower filling body; the prestressed anchor rods are driven into the prefabricated filling body and the surrounding rock in an "X-shaped" cross.

[0006] Preferably, the upper filling body and the lower filling body are both trapezoidal, and the wedge-shaped block is a triangle that matches the shape of the upper filling body and the lower filling body.

[0007] Preferably, the prefabricated filling body is prefabricated from concrete with an expansion agent added; and the wedge-shaped block is high-strength compressed wood that has been treated with antiseptic treatment.

[0008] Preferably, the prestressed anchor rods pass through the prefabricated filling body and the surrounding rock at the same time, and the intersection point is located inside the prefabricated filling body; the spacing between two adjacent "X-shaped" prestressed anchor rods is less than the length of a single prefabricated filling body.

[0009] Preferably, the filling and treatment structure also includes a shotcrete layer sprayed on the surface of the surrounding rock.

[0010] Preferably, the height of the trapezoidal groove is higher than the thickness of the weak structural surface, and the depth is greater than the maximum mud depth of the weak structural surface.

[0011] Compared with the prior art, the advantages of the weak structural surface filling and treatment structure disclosed in the utility model are:

[0012] 1. The utility model improves the bearing capacity of the surrounding rock through the design of the prefabricated filling body, and the prefabricated filling body isolates the weak structural surface from the contact with external water vapor, and to a certain extent avoids the softening and mudification of the weak structural surface when it comes into contact with water; at the same time, the prefabricated filling body is designed to be trapezoidal to prevent the surrounding rock from being squeezed out by pressure.

[0013] 2. The "X-shaped" cross-driven anchor design can make the shotcrete layer, prefabricated filling body and surrounding rock form a complete bearing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is an overall schematic diagram of the utility model.

[0016] Figure 2 Schematic diagram of the prefabricated filling structure.

[0017] In the figure: 1-surrounding rock; 2-prefabricated filling body; 3-weak structural surface; 4-trapezoidal groove; 5-shotcrete layer; 6-prestressed anchor rod; 7-wedge block; 8-upper filling body; 9-lower filling body. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is briefly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Figure 1-Figure 2 The preferred embodiments of the utility model are shown and analyzed in detail.

[0020] like Figure 1 A weak structural surface filling and treatment structure shown includes a prefabricated filling body 2, a prestressed anchor rod 6 and a shotcrete layer 5 sprayed on the surface of the surrounding rock 1.

[0021] The prefabricated filling body 2 is filled in the trapezoidal groove 4 of the surrounding rock 1, and is adapted to the shape of the trapezoidal groove 4. The prefabricated filling body 2 includes an upper filling body 8, a lower filling body 9 and a wedge block 7, and the wedge block 7 is filled between the upper filling body 8 and the lower filling body 9. The upper filling body 8 and the lower filling body 9 are both trapezoidal, and the wedge block 7 is a triangle adapted to the shape of the upper filling body 8 and the lower filling body 9. The prefabricated filling body 2 is prefabricated by a mold with concrete added with an expansion agent, and the wedge block 7 is a high-strength compressed wood that has been treated with anti-corrosion. The height of the trapezoidal groove 4 needs to be higher than the thickness of the weak structural surface 3, and the depth of the trapezoidal groove 4 should be as large as possible as possible. The length of a single groove should not be too long to avoid collapse. Before grooving, the surface of the surrounding rock 1 needs to be repaired to make it flat for easy construction, and the groove wall of the trapezoidal groove 4 needs to be cleaned after grooving. When installing the prefabricated filling body 2, first install the lower filling body 9, then install the upper filling body 8, and finally drive the wedge block 7 to make the prefabricated filling body 2 in close contact with the surrounding rock 1. The upper filling body 8, the lower filling body 9 and the wedge block 7 have the characteristics of light weight, strong bearing capacity, good insulation, flame retardancy and explosion-proof, and easy cutting. The volume of the wedge block 7 should be slightly larger than the volume of the empty space after installing the upper filling body 8 and the lower filling body 9, so that the upper filling body 8, the lower filling body 9 and the surrounding rock 1 can be in close contact after the wedge block 7 is driven.

[0022] The prestressed anchor rods 6 are prestressed and have high material strength. They are driven into the surrounding rock 1 in an "X-shaped" manner, and pass through the shotcrete layer 5, the prefabricated filling body 2 and the surrounding rock 1 in sequence. The intersection point is located in the prefabricated filling body 2. The intersection angle should be determined to ensure that the construction is as convenient as possible while passing through the prefabricated filling body 2 and the surrounding rock 1 at the same time. The distance between two adjacent "X-shaped" prestressed anchor rods 6 is less than the length of a single prefabricated filling body 2.

[0023] The shotcrete material used in the shotcrete layer 5 has high bonding strength, strong adhesion, anti-aging, and good sealing properties. It can effectively prevent the soft structural surface 3 from softening and muddying in contact with water vapor, prevent the surrounding rock 1 from weathering, and prevent the metal mesh from rusting; during the construction of the shotcrete layer 5, it is necessary to ensure that the spraying layer is uniform, the sealing is complete, and there are no leaks.

[0024] A construction method for a weak structural surface filling and treatment structure is carried out in the following steps: 1. Use a slotting machine to excavate an isosceles trapezoidal groove 4 at the weak structural surface 3 of the side of the surrounding rock 1. The top of the trapezoidal groove 4 is inclined upward at a certain angle, and the bottom is inclined downward at a certain angle, and the weak structural surface 3 is excavated in batches. 2. Clean and level the groove wall of the excavated trapezoidal groove 4. 3. Fill the interior of the trapezoidal groove 4 with a prefabricated filling body 2. When filling, first install the lower filling body 9, then install the upper filling body 8, and finally drive the wedge block 7 to make the prefabricated filling body 2 in close contact with the surrounding rock 1. 4. Use a thin spraying material to spray and seal the area near the weak structural surface 3. The spraying layer 5 can isolate the weak structural surface 3 from contacting the water vapor in the tunnel. 5. Cross-drive high-strength prestressed anchor rods 6 in the prefabricated filling body 2 area in an "X-shaped" manner to strengthen support.

[0025] The above description of the disclosed embodiments enables professionals in the field to implement and use the utility model. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit and scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A weak structural surface filling and treatment structure, characterized in that: The invention comprises a prefabricated filling body (2) and a prestressed anchor rod (6); the prefabricated filling body (2) is filled in a trapezoidal groove (4) of a surrounding rock (1), and comprises an upper filling body (8), a lower filling body (9) and a wedge block (7); the wedge block (7) is filled between the upper filling body (8) and the lower filling body (9); the prestressed anchor rod (6) is driven into the prefabricated filling body (2) and the surrounding rock (1) in an "X" cross shape.

2. A weak structural surface filling and treatment structure according to claim 1, characterized in that: The upper filling body (8) and the lower filling body (9) are both trapezoidal, and the wedge-shaped block (7) is a triangle that matches the shapes of the upper filling body (8) and the lower filling body (9).

3. A weak structural surface filling and treatment structure according to claim 2, characterized in that: The prefabricated filling body (2) is prefabricated from concrete with an expansion agent added; the wedge-shaped block (7) is high-strength compressed wood that has been treated with antiseptic treatment.

4. A weak structural surface filling and treatment structure according to claim 1, characterized in that: The prestressed anchor rod (6) passes through the prefabricated filling body (2) and the surrounding rock (1) at the same time, and the intersection point is located inside the prefabricated filling body (2); the distance between two adjacent "X-shaped" prestressed anchor rods (6) is less than the length of a single prefabricated filling body (2).

5. A weak structural surface filling and treatment structure according to claim 1, characterized in that: The filling and treatment structure also includes a shotcrete layer (5) sprayed on the surface of the surrounding rock (1).

6. A weak structural surface filling and treatment structure according to claim 1, characterized in that: The height of the trapezoidal groove (4) is higher than the thickness of the weak structural surface (3), and the depth is greater than the maximum mud depth of the weak structural surface (3).

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