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Dead joint member for inner anchoring section of pressure type permanent anchor cable

A permanent, pressure-type technology, applied in the direction of basic structure engineering, construction, sheet pile walls, etc., can solve the problems of broken anchor cables, failure to obtain relative fixation, and slope accidents, etc., and achieves easy assembly construction and simple structure Effect

Active Publication Date: 2008-12-24
李炳奇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, do not fully consider the anti-corrosion treatment of connection part in the prior art, moreover, near the upper end of extruded sleeve, because the shrinkage of protective cover often can occur that steel strand produces the gap of unprotected state (see Figure 8 ), because the inner anchorage section is usually in groundwater, chemical corrosion and stress corrosion are likely to occur at the connection between the steel strand and the extrusion sleeve, which will cause the broken wire of the steel strand at the connection to be damaged and cause the anchor cable to lose its function and cause edge slope accident happened
In addition, in the prior art, due to insufficient relative fixation between the extrusion sleeve and the pressure bearing plate, it is often difficult to ensure that the extrusion sleeve and the steel strand are kept in good contact with the pressure bearing plate during the handling and construction of the anchor cable body. vertical state, so that the tension force cannot be effectively transmitted to the foundation, which is also the main cause of slope accidents

Method used

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  • Dead joint member for inner anchoring section of pressure type permanent anchor cable
  • Dead joint member for inner anchoring section of pressure type permanent anchor cable
  • Dead joint member for inner anchoring section of pressure type permanent anchor cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Referring to Fig. 1, the inner anchorage section I of this example is provided with three sets of load-bearing components A1, A2, A3, and the lower ends of the six unbonded stay cables 8 are divided into three groups on average, and are symmetrically fixed on the bearing plates 2 of the three sets of load-bearing components respectively. The stay cables 8 pass through the alignment holes arranged circularly on the centering frame 6 in parallel to keep the stay cables parallel and keep the anchor cable body at the center of the insertion hole 9 .

[0021] see figure 2 , Fig. 3, Fig. 4, the pressure bearing plate 2 of bearing assembly A1 is provided with six vertically penetrating cable holes 16 uniformly distributed around the central hole 15, four of which are set as through holes with the same diameter for making The stay cables that are fixedly connected with the next group of pressure bearing plates pass through, and the other two are fixed threading holes 16a for f...

Embodiment 2

[0029] see Figure 9 In this example, the threaded connection structure between the fixed shield 11 and the pressure bearing plate 2 is the same as that of the embodiment 1, which is an embedded threaded connection structure. Groove 18, the upper port of the fixed shield 11 is inserted into the annular groove, and is threadedly connected with the side wall of the annular groove.

Embodiment 3

[0031] see Figure 10 In this example, the screw connection structure between the fixed shield 11 and the pressure bearing plate 2 is as follows: on the lower end surface of the pressure bearing plate 2, there is an annular vertical wall 19 that surrounds the fixed threading hole 16a and rises downward. The fixed shield 11 The upper port is threadedly connected with the annular vertical wall.

[0032]The "vertical" and "horizontal" directions mentioned herein are relative to the ground plane. For example, when the ground plane is a slope, the "vertical" refers to the direction perpendicular to the slope.

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Abstract

The fixed connection member of the anchor section in the pressure-type permanent anchor cable is provided with an unbonded cable (8), a bearing plate (2), and the bearing plate is provided with a vertically penetrating cable hole. The lower end of the cable passes through the fixed cable hole (16a) in the cable hole of the corresponding pressure bearing plate from top to bottom, and is stuck in the lower opening of the fixed cable hole through the extrusion sleeve (1) fixed to the lower end of the unbonded cable , the extrusion sleeve is covered with a fixed shield (11), the inner diameter of the fixed threading hole on the pressure bearing plate is in the shape of a small upper step and a larger bottom, the extrusion sleeve is stuck at the lower port of the small diameter hole, and the inner wall of the large diameter hole is provided with Thread, the upper port of the fixed guard is screwed into the large-diameter hole at the lower part of the fixed threading hole, the lower part of the fixed guard is provided with an oil injection part (13), the inner cavity of the sealed fixed guard is filled with anti-rust grease (14), squeezed A pre-tightening elastic part (12) is installed between the lower end of the sleeve and the bottom end surface of the inner cavity of the fixed shield. The invention can keep the extrusion sleeve in a vertical and anti-corrosion state with the pressure-bearing plate, and has a simple structure, easy assembly and construction, and anti-corrosion Good performance.

Description

technical field [0001] The invention belongs to a fixed connection component of an inner anchor section of a pressure-type permanent anchor cable used for slope stability in geotechnical engineering. Background technique [0002] Prestressed anchor cables are an important means for slope stability and reinforcement in geotechnical engineering. The permanent anchor cables require a service life of 50-100 years or even longer, so the durability requirements for prestressed anchor cables are getting higher and higher. . Referring to Fig. 1, the pressure-type permanent anchor cable is mainly composed of the inner anchor section (I), the free section (II) and the outer anchorage of the exposed foundation in the solidified cement slurry stone (7) embedded in the foundation socket (9). Usually, the unbonded cable (8) is composed of a steel strand (8b) and a protective cover (8a). The anchoring section is fixedly connected, and the inner anchoring section fixes the lower end of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/76
Inventor 李炳奇矢富盟祥
Owner 李炳奇