A prestressed steel anchor pipe anchor cable tensioning device

Abstract

The invention discloses a prestressed steel anchor pipe anchor cable tensioning device, comprising a steel anchor pipe and an anchor cable, a working pad is sleeved on the steel anchor pipe, a working nut is threadedly connected to the outer side of the working pad, a tensioning pad is arranged on the outer side of the working nut, the tensioning pad straddles the steel anchor pipe, a tensioning nut is threadedly connected to the outer side of the tensioning pad, the tensioning nut fastens the tensioning pad to the working nut, a steel support is sleeved on the outer side of the tensioning pad, a working anchor is fixed to the outer side of the other end face of the steel support, a pressure plate is fixed to the outer side of the working anchor, a jack is fixed to the outer side of the pressure plate, a tool anchor is fixed to the outer side of the jack, a limited pad is fixed to the outer side of the tool anchor, and a screw locks the limited pad and the tensioning pad into a tensioning whole. The device integrates the tensioning of the steel anchor pipe and the anchor cable into a set of devices, can complete the tensioning of the steel anchor pipe, and can complete the tensioning of the anchor cable, saves a lot of tensioning steps, and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, in particular to a prestressed steel anchor pipe anchor cable tensioning device, which is suitable for slope reinforcement projects of highways, railways, mines, municipal administration and the like. Background Art

[0002] As a concealed project, the main materials of slope anchoring engineering, steel and concrete, are buried in various types of rock and soil. The anchoring section is in a stratum with relatively developed groundwater. Collapse and shrinkage are prone to occur during the drilling process, making it difficult to install the anchor cable. The bonding force between the anchoring section and the soil layer is limited. Long-term contact with groundwater and site soil leads to reduced mechanical properties such as durability and strength of the anchoring structure. In order to improve the anchoring effect of the stratum and solve the problem of anchor cable installation, in addition to improving the existing technology, it should also be combined with the continuously developing new technology to improve the stability of slope anchoring. Steel anchor pipes and anchor cables are two commonly used anchoring tools in the process of slope anchoring, and the two are often used in combination to improve the anchoring effect. However, the tensioning strengths of the steel anchor pipe and the anchor cable are not the same. The tensioning strength of the anchor cable is higher than that of the steel anchor pipe. Therefore, during the tensioning process, the steel anchor cable needs to be tensioned first, and then the steel anchor pipe needs to be tensioned. During the tensioning process, the two need to be tensioned separately using different tensioning tools. This tensioning method is cumbersome, time-consuming and labor-intensive. Summary of the invention

[0003] In order to solve the above problems, the present invention designs a prestressed steel anchor pipe anchor cable tensioning device, which integrates the tensioning of the steel anchor pipe and the anchor cable into a set of devices, which can complete the tensioning of the steel anchor pipe and the anchor cable, saving a large number of tensioning steps, improving work efficiency, and saving a large amount of manpower and material resources.

[0004] In order to achieve the above technical effects, the present invention is implemented by the following technical solutions:

[0005] A prestressed steel anchor pipe anchor cable tensioning device comprises a steel anchor pipe and an anchor cable, one end of the anchor cable is fixed in the steel anchor pipe and the other end extends from the end of the steel anchor pipe, the front end of the steel anchor pipe is anchored in a drill hole and the rear end extends from a frame beam, a working pad is sleeved on the steel anchor pipe, a working nut is threadedly connected to the outer side of the working pad, a tensioning pad is arranged on the outer side of the working nut, the tensioning pad straddles the steel anchor pipe, the tensioning nut is threadedly connected to the outer side of the tensioning pad, and the tensioning nut fastens the tensioning pad On the working nut, a steel support is sleeved on the outside of the tension pad, one end of the steel support is supported on the working pad, a working anchor is fixed on the outside of the other end of the steel support, a pressure plate is fixed on the outside of the working anchor, a jack is fixed on the outside of the pressure plate, a tool anchor is fixed on the outside of the jack, a limit pad is fixed on the outside of the tool anchor, a connecting screw hole is opened on the limit pad, the screw passes through the limit pad, the jack and the tension pad in turn, and locking nuts are threadedly connected at both ends of the screw. Anchor holes are opened on the working anchor, the pressure plate and the tool anchor, and conical clips are inserted into the anchor holes. The anchor cable passes through the working pad, the working nut, the tension pad, the tension nut, the steel support, the working anchor, the pressure plate, the jack, the working anchor and the limit pad in turn and extends from the limit pad.

[0006] Furthermore, the steel support is composed of a top plate and a pair of side plates, the side plates are fixed on both sides of the top plate, and a beam penetration hole is opened on the top plate.

[0007] Furthermore, a U-shaped slot is provided on the tensioning pad, and a screw hole is provided at each of the four corners of the tensioning pad.

[0008] The beneficial effect of the present invention is that the device integrates the tensioning of the steel anchor pipe and the anchor cable into one set of devices, which can complete the tensioning of the steel anchor pipe and the anchor cable, saving a large number of tensioning steps, improving work efficiency, and saving a large amount of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0010] Figure 1 It is a cross-sectional view of the assembly structure of the prestressed steel anchor pipe anchor cable tensioning device;

[0011] Figure 2 yes Figure 1 AA section view;

[0012] Figure 3 yes Figure 1 BB cross-sectional view;

[0013] Figure 4 is a structural schematic diagram of the tension pad;

[0014] Figure 5 It is a structural schematic diagram of the steel support.

[0015] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0016] 1-drilling hole, 2-secondary grouting body, 3-primary grouting body, 4-surrounding rock, 5-secondary grouting hole, 6-anchor cable, 7-steel anchor pipe, 8-frame beam, 9-working pad, 10-working nut, 11-steel support, 12-tensioning pad, 13-tensioning nut, 14-working anchor, 15-pressure plate, 16-jack, 17-tool anchor, 18-limiting pad, 19-screw, 20-locking nut, 21-screw hole, 22-U-shaped slot, 23-wing plate, 24-top plate, 25-side plate, 26-beam hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1-3As shown, a prestressed steel anchor pipe anchor cable tensioning device comprises a steel anchor pipe 7 and an anchor cable 6, one end of the anchor cable 6 is fixed in the steel anchor pipe 7 and the other end extends from the end of the steel anchor pipe 7, the front end of the steel anchor pipe 7 is anchored in the borehole 1 and the rear end extends from the frame beam 8, a working pad 9 is sleeved on the steel anchor pipe 7, the outer side of the working pad 9 is threadedly connected to a working nut 10, the outer side of the working nut 10 is provided with a tensioning pad 12, the tensioning pad 12 straddles the steel anchor pipe 7, the outer side of the tensioning pad 12 is threadedly connected to a tensioning nut 13, the tensioning nut 13 fastens the tensioning pad 12 to the working nut 10 A steel support 11 is sleeved on the outer side of the tensioning pad 12, one end of the steel support 11 is supported on the working pad 12, a working anchor 14 is fixed to the outer side of the other end face of the steel support 11, a pressure plate 15 is fixed to the outer side of the working anchor 14, a jack 16 is fixed to the outer side of the pressure plate 15, a tool anchor 17 is fixed to the outer side of the jack 16, a limiting pad 18 is fixed to the outer side of the tool anchor 17, the limiting pad 18 is provided with connecting screw holes, a screw 19 passes through the limiting pad 18, the jack 16 and the tensioning pad 12 in sequence, and locking nuts 20 are threadedly connected at both ends of the screw 19. Anchor holes are opened on the working anchor 14, the pressure plate 15 and the tool anchor 17, and conical clips are inserted into the anchor holes. The anchor cable 6 passes through the working pad 9, the working nut 10, the tensioning pad 12, the tensioning nut 13, the steel support 11, the working anchor 14, the pressure plate 15, the jack 16, the working anchor 17 and the limiting pad 18 in sequence and extends out from the limiting pad 18.

[0019] like Figure 4 As shown, a U-shaped slot 22 is formed on the tensioning pad 12 , and a screw hole 21 is formed at each of the four corners of the tensioning pad 12 .

[0020] like Figure 5 As shown, the steel support 11 is composed of a top plate 24 and a pair of side plates 25. The side plates 25 are fixed to both sides of the top plate 24. A beam passing hole 26 is opened on the top plate.

[0021] A specific application of the present invention is:

[0022] (1) Anchor cable tensioning: fix the front end of the anchor cable to the front end of the steel anchor pipe 7, fix the grouting pipe to the outer wall of the steel anchor pipe 7, send the steel anchor pipe 7 together with the grouting pipe to the bottom of the borehole 1, inject slurry into the borehole 1 through the grouting pipe, and form a primary grouting body 3 after initial setting. Build a frame beam 8 on the surface of the surrounding rock 4, reserve a certain extension length for the steel anchor pipe 7, assemble the working pad 9, working nut 10, tensioning pad 12, tensioning nut 13, steel support 11, working anchor 14, pressure plate 15, jack 16 and working anchor 17 in sequence, and pass the anchor cable 6 through the working pad 9, working nut 10, tensioning pad 12, tensioning nut 13, steel support 11, working anchor 14, pressure plate 15, jack 16 and working anchor 17. Connect the jack 16 to the oil pump, start the oil pump, and the jack 16 tensions the anchor cable 6.

[0023] (2) Tensioning of the steel anchor pipe: After the primary grouting body 3 is initially solidified, the slurry is injected through the steel anchor pipe 7, and the slurry is split and injected into the primary grouting body 3 through the secondary grouting hole 5 of the steel anchor pipe 7. The slurry initially solidifies in the steel anchor pipe 7 to form the secondary grouting body 2; then, the limit plate 18 is fixed to the outer side of the working anchor 17, the screw 19 is passed through the limit plate 18, the jack 16, and the tensioning plate 12, and the two ends of the screw 19 are screwed into the locking nut 20, so that the limit plate 18 is fixed on the working anchor 17, and the oil pump is started. At this time, the tensioning force is transmitted to the screw 19 through the limit plate 18, and the screw 19 transmits the tensioning force to the tensioning plate 12. The tensioning plate 12 pushes the tensioning nut 13, and the tensioning nut 13 is threadedly connected to the steel anchor pipe 7. The tensioning nut 13 transmits the tensioning force to the steel anchor pipe 7, thereby achieving the tensioning of the steel anchor pipe 7.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0025] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A prestressed steel anchor pipe anchor cable tensioning device, comprising a steel anchor pipe and an anchor cable, one end of the anchor cable is fixed in the steel anchor pipe and the other end extends from the end of the steel anchor pipe, the front end of the steel anchor pipe is anchored in a drilled hole and the rear end extends from a frame beam, characterized in that: The steel anchor pipe is sleeved with a working pad, the outer side of the working pad is threadedly connected with a working nut, a tensioning pad is arranged on the outer side of the working nut, the tensioning pad straddles the steel anchor pipe, the outer side of the tensioning pad is threadedly connected with a tensioning nut, the tensioning nut fastens the tensioning pad to the working nut, a steel support is sleeved on the outer side of the tensioning pad, one end of the steel support is supported on the working pad, a working anchor is fixed on the outer side of the other end face of the steel support, a pressure plate is fixed on the outer side of the working anchor, a jack is fixed on the outer side of the pressure plate, and the jack A tool anchor is fixed to the outside of the top, and a limit pad is fixed to the outside of the tool anchor. A connecting screw hole is opened on the limit pad, and the screw passes through the limit pad, jack and tensioning pad in sequence, and locking nuts are threadedly connected at both ends of the screw; anchor holes are opened on the working anchor, pressure plate and tool anchor, and conical clips are inserted into the anchor holes. The anchor cable passes through the working pad, working nut, tensioning pad, tensioning nut, steel support, working anchor, pressure plate, jack, working anchor and limit pad in sequence and extends out from the limit pad.

2. A prestressed steel anchor pipe anchor cable tensioning device according to claim 1, characterized in that: The steel support is composed of a top plate and a pair of side plates, the side plates are fixed on both sides of the top plate, and a beam penetration hole is opened on the top plate.

3. The prestressed steel anchor pipe anchor cable tensioning device according to claim 1, characterized in that: The tension pad is provided with a U-shaped slot, and each of the four corners of the tension pad is provided with a screw hole.

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