Pre-stressed anchor cable for foundation pit supporting

Abstract

The utility model relates to the technical field of pre-stressed anchor cables, in particular to a pre-stressed anchor cable for supporting a foundation pit, which comprises a conical head, a plurality of groups of anchor cable bodies are assembled on the surface of the outer side end of the conical head, and a plurality of groups of inclined blocks are integrally constructed on the peripheral surface of the conical head; when a foundation pit needs to be supported, the anchor cable body can be conveniently installed on the surface of the conical head, then a grouting pipe is installed, the conical head can be inserted into a hole formed in the side wall of the foundation pit, and when the conical head reaches the bottom and returns, the supporting rods in the concave holes in the periphery of the conical head can conveniently push the ejector rod, so that the foundation pit is supported. The ejector rod can swing at the side end of the inclined block, one end of the ejector rod is expanded to form a barb structure and can make contact with the hole wall, reverse thrust is conveniently provided for the conical head, and therefore the stability of the conical head located at the bottom of the hole is improved, the situation that the conical head and the anchor cable body return and deviate is reduced, and the follow-up stable grouting procedure is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed anchor cables, in particular to a prestressed anchor cable used for foundation pit support. Background Art

[0002] During the construction of shield tunnel crossing anchor cables, the tunnel after shield excavation needs to complete the foundation pit support in time to support the tunnel and avoid tunnel collapse. At this time, the foundation pit support needs prestressed anchor cables to support the tunnel foundation pit; Patent No. CN201921702922.1 discloses a prestressed anchor cable for foundation pit support for shield tunnel crossing anchor cable construction. By setting a protrusion, the guide cone is fixed to the specified position, and the protrusion on the surface of the guide cone is used to increase the friction and extrusion force at the specified position. When the guide cone is fixed in the support, the guide cone is prevented from loosening when the connection is stressed; however, since the height of the protrusion on the periphery of the guide cone is fixed, and the aperture of the hole for installing the anchor cable is generally larger than the specification of the guide cone, this leads to the use of the protrusion to assist in limiting the position of the guide cone, and the guide cone is still prone to pullback displacement. To this end, we propose a prestressed anchor cable for foundation pit support. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a prestressed anchor cable for foundation pit support.

[0004] The utility model solves the technical problem by adopting a technical solution of a prestressed anchor cable for foundation pit support, comprising a cone head, an anchor cable body is assembled on the outer end surface of the cone head, and the anchor cable body has multiple groups, and an inclined block is integrally constructed on the outer peripheral surface of the cone head, and the inclined block has multiple groups;

[0005] A push rod is hinged on one side end surface of the outer circumference of the inclined block through a rotating shaft, and a groove is provided on a side of the push rod close to the cone head. A concave hole corresponding to the groove is provided on the outer circumference surface of the cone head, and a support rod is hinged between the concave hole and the groove through a rotating shaft.

[0006] By adopting the above technical scheme, when it is necessary to support the foundation pit, the anchor cable body can be conveniently installed on the surface of the cone head, and then the grouting pipe can be installed to insert the cone head into the hole opened on the side wall of the foundation pit. When the cone head reaches the bottom and returns to its original position, the support rod in the concave hole on the outer periphery of the cone head can conveniently push the push rod, so that the push rod can swing at the side end of the inclined block and one end of the push rod can be stretched to form a barb structure, and can contact each other with the hole wall, so as to provide a reverse thrust for the cone head, thereby improving the stability of the cone head when it is at the bottom of the hole, and reducing the situation of return deviation between the cone head and the anchor cable body, so as to facilitate the subsequent stable grouting process.

[0007] When the cone head reaches the bottom of the hole, the multiple groups of inclined blocks on the outer periphery of the cone head can provide a certain anti-slip performance, which is convenient for reducing the rotation of the cone head and the anchor body in the hole, thereby reducing the collapse of the hole due to the random rotation friction between the cone head and the anchor body.

[0008] Specifically, a spring that can be used to push the support rod to swing is installed inside the concave hole.

[0009] By adopting the above technical solution, the spring can easily push the support rod in the recessed hole, so that the end of the support rod connected to the push rod can be tilted up, and it is convenient to push the push rod back, so that the push rod located on the outer periphery of the cone head can contact with the hole wall, and it will not be affected when the cone head moves forward, and it can provide a certain reverse thrust when the cone head moves back.

[0010] Specifically, the outer peripheral surface of the cone head is integrally structured with arc blocks, and there are multiple groups of arc blocks.

[0011] By adopting the above technical solution, the multiple groups of arc-shaped blocks on the periphery of the cone head can cooperate with each other and with the inclined blocks, so as to improve the stability of the cone head after the subsequent grouting is completed.

[0012] Specifically, the plurality of groups of inclined blocks are evenly distributed on the outer peripheral surface of the cone head.

[0013] By adopting the above technical solution, the inclined blocks evenly distributed on the surface of the cone head can cooperate with each other, so as to assist in limiting the position of the cone head and improve the stability of the cone head after displacement.

[0014] Specifically, the outer peripheral surface of the push rod is provided with grooves, and there are multiple groups of grooves.

[0015] By adopting the above technical solution, the grooves on the outer periphery of the push rod can provide a certain degree of anti-slip property, thereby improving the stability of the push rod when it is limited.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The technical solution of the present application, through the design of grooves, recessed holes, support rods and push rods, can conveniently install the anchor cable body on the surface of the cone head when it is necessary to support the foundation pit, and then install the grouting pipe to insert the cone head into the hole opened on the side wall of the foundation pit. When the cone head reaches the bottom and returns to its original position, the support rods in the recessed holes on the outer periphery of the cone head facilitate pushing the push rod, so that the push rod can swing on the side end of the inclined block and one end of the push rod can be stretched to form a barb structure, and can contact each other with the hole wall, so as to provide reverse thrust for the cone head, thereby improving the stability of the cone head when it is at the bottom of the hole, and reducing the situation of return deviation between the cone head and the anchor cable body, which is convenient for the subsequent stable grouting process.

[0018] 2. The design of the cone head, anchor body and inclined blocks in the technical solution of the present application is that when the cone head reaches the bottom side of the hole, the multiple groups of inclined blocks on the outer periphery of the cone head can provide a certain anti-slip performance, which is convenient for reducing the rotation of the cone head and the anchor body in the hole, thereby reducing the collapse of the hole due to the random rotation friction between the cone head and the anchor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is an axonometric drawing of the utility model;

[0021] Figure 2 This is a schematic diagram of the cone head structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the connection structure between the top rod and the supporting rod of the utility model;

[0023] In the figure: 1, cone head; 2, anchor cable body; 3, inclined block; 4, top rod; 5, concave hole; 6, groove; 7, support rod; 8, spring; 9, groove; 10, arc block. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figure 1-3 The utility model embodiment provides a technical solution: a prestressed anchor cable for foundation pit support, including a cone head 1, an anchor cable body 2 is assembled on the outer end surface of the cone head 1, and the anchor cable body 2 has multiple groups, and an inclined block 3 is integrally constructed on the outer peripheral surface of the cone head 1, and the inclined block 3 has multiple groups; a top rod 4 is hinged on the end surface of the outer peripheral side of the inclined block 3 through a rotating shaft, and a groove 6 is provided on the side of the top rod 4 close to the cone head 1, and a concave hole 5 corresponding to the groove 6 is provided on the outer peripheral surface of the cone head 1, and a support rod 7 is hinged between the concave hole 5 and the groove 6 through a rotating shaft.

[0026] When in use, when it is necessary to support the foundation pit, the anchor cable body 2 can be conveniently installed on the surface of the cone head 1, and then the grouting pipe can be installed to insert the cone head 1 into the hole opened on the side wall of the foundation pit. When the cone head 1 reaches the bottom and returns to its original position, the support rod 7 in the concave hole 5 on the outer periphery of the cone head 1 can conveniently push the push rod 4, so that the push rod 4 can swing on the side end of the inclined block 3 and one end of the push rod 4 can be stretched to form a barb structure, and can contact each other with the hole wall, so as to provide a reverse thrust for the cone head 1, thereby improving the stability of the cone head 1 when it is at the bottom of the hole, and reducing the situation of the cone head 1 and the anchor cable body 2 returning to their original position, so as to facilitate the subsequent stable grouting process;

[0027] When the cone head 1 reaches the bottom of the hole, the multiple groups of inclined blocks 3 on the outer periphery of the cone head 1 can provide a certain anti-slip performance, which is convenient for reducing the rotation of the cone head 1 and the anchor body 2 in the hole, thereby reducing the collapse of the hole due to the random rotation friction between the cone head 1 and the anchor body 2.

[0028] like Figure 3 As shown, a spring 8 is mounted inside the concave hole 5 to push the support rod 7 to swing.

[0029] When in use, the spring 8 facilitates pushing the support rod 7 in the recessed hole 5, so that the end of the support rod 7 connected to the push rod 4 can be tilted up, and facilitates the reverse push of the push rod 4, so that the push rod 4 located on the outer periphery of the cone head 1 can contact with the hole wall, and will not be affected when the cone head 1 moves forward, and can provide a certain reverse thrust when the cone head 1 moves back.

[0030] like Figure 1 and Figure 2 As shown, the outer circumferential surface of the cone head 1 is integrally constructed with arc blocks 10, and there are multiple groups of arc blocks 10.

[0031] When in use, the multiple groups of arc-shaped blocks 10 on the outer periphery of the cone head 1 can cooperate with each other and with the inclined blocks 3, so as to improve the stability of the cone head 1 after the subsequent grouting is completed.

[0032] like Figure 1 and Figure 2 As shown, multiple groups of inclined blocks 3 are evenly distributed on the outer peripheral surface of the cone head 1.

[0033] When in use, the inclined blocks 3 evenly distributed on the surface of the cone head 1 can cooperate with each other to assist in limiting the position of the cone head 1 and to improve the stability of the cone head 1 after displacement.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, grooves 9 are formed on the outer circumferential surface of the push rod 4, and there are multiple groups of grooves 9.

[0035] When in use, the grooves 9 on the outer periphery of the push rod 4 facilitate providing a certain degree of anti-slip properties, thereby improving the stability of the push rod 4 when limiting its position.

[0036] The working principle and use process of the utility model are as follows: when in use, first install the corresponding structural components in a suitable position. When the foundation pit needs to be supported, the anchor cable body 2 can be conveniently installed on the surface of the cone head 1, and then the grouting pipe can be installed to insert the cone head 1 into the hole opened on the side wall of the foundation pit. When the cone head 1 reaches the bottom and returns to its original position, the support rod 7 in the concave hole 5 on the outer periphery of the cone head 1 facilitates the pushing of the top rod 4, so that the top rod 4 can swing at the side end of the inclined block 3 and one end of the top rod 4 is stretched to form a barb structure, and can The cone head 1 is able to contact with the hole wall, so as to provide a reverse thrust for the cone head 1, thereby improving the stability of the cone head 1 when it is at the bottom of the hole, and reducing the return deviation of the cone head 1 and the anchor cable body 2, which is convenient for the subsequent stable grouting process. At the same time, when the cone head 1 reaches the bottom side of the hole, the multiple groups of inclined blocks 3 on the periphery of the cone head 1 can provide a certain anti-slip performance, which is convenient for reducing the self-rotation of the cone head 1 and the anchor cable body 2 in the hole, thereby reducing the hole collapse caused by the random rotation friction between the cone head 1 and the anchor cable body 2.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A prestressed anchor cable for foundation pit support, characterized in that: It comprises a cone head (1), the outer end surface of the cone head (1) is equipped with an anchor cable body (2), and the anchor cable body (2) has multiple groups; the outer peripheral surface of the cone head (1) is integrally constructed with an inclined block (3), and the inclined block (3) has multiple groups; A push rod (4) is hingedly connected to the outer peripheral end surface of the inclined block (3) via a rotating shaft, and a groove (6) is provided on a side of the push rod (4) close to the cone head (1), and a concave hole (5) corresponding to the groove (6) is provided on the outer peripheral surface of the cone head (1), and a support rod (7) is hingedly connected between the concave hole (5) and the groove (6) via a rotating shaft.

2. The prestressed anchor cable for foundation pit support according to claim 1, characterized in that: The inner side of the concave hole (5) is equipped with a spring (8) which can be used to push the support rod (7) to swing.

3. The prestressed anchor cable for foundation pit support according to claim 1, characterized in that: The outer peripheral surface of the cone head (1) is integrally constructed with an arc-shaped block (10), and there are multiple groups of the arc-shaped blocks (10).

4. The prestressed anchor cable for foundation pit support according to claim 1, characterized in that: The plurality of groups of inclined blocks (3) are evenly distributed on the outer peripheral surface of the cone head (1).

5. The prestressed anchor cable for foundation pit support according to claim 1, characterized in that: The outer peripheral surface of the push rod (4) is provided with grooves (9), and there are multiple groups of grooves (9).

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