Novel expansion-type yielding prestress grouting anchor rope and using method thereof

A kind of grouting anchor cable and expansion technology, which is applied in the direction of earthwork drilling, installation of anchor rods, sheet pile walls, etc. , to prevent premature failure of the anchor rod, good support effect, and low cost.

Active Publication Date: 2013-01-16
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of grouting anchor cable has no initial anchoring force, and the anchoring effect can only be produced after the grout has solidified to a certain strength; moreover, the tray is flat, and cannot play a role in yielding when the surrounding rock deforms, although there are cu

Method used

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  • Novel expansion-type yielding prestress grouting anchor rope and using method thereof
  • Novel expansion-type yielding prestress grouting anchor rope and using method thereof

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] Such as figure 1 As shown, a new type of expansion-type yielding pressure prestressed grouting anchor cable, it includes anchor cable body 4, tray and locking device, anchor cable body 4 is a hollow structure with grouting core tube 6, the anchor The cable body 4 also includes a hollow rod body 7 with a conical head connected to the bottom end of the anchor cable body 4 holes, the grouting core pipe 6 extends into the hollow rod body 7, and the conical head is processed with a grouting hole 9; An expansion tube 5 with a diameter smaller than the diameter of the conical head is put on the body 4, and the bottom end of the expansion tube 5 is provided with an open groove 8, and the length of the expansion tube 5 should satisfy that one end is placed on the conical head and the other end is placed on the lock. on the tightening device 1; the tray is comp...

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PUM

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Abstract

The invention discloses a novel expansion-type yielding prestress grouting anchor rope and a using method thereof. An anchor rope body also comprises a hollow rod body which is connected to the bottom end of the anchor rope body and is provided with a conical head; a grouting core pipe extends into the hollow rod body; a grouting hole is machined on the conical head; an expansion pipe with the diameter smaller than that of the conical head is sleeved on the anchor rope body; the bottom end of the expansion pipe is provided with an open groove; the length of the expansion pipe meets the fact that one end of the expansion pipe butts against the conical head, and the other end of the expansion pipe butts against a locking device; a tray consists of two plate bodies which are overlapped and buckled mutually, wherein one plate body is a disc-shaped plate body playing a yielding effect, and the other plate body is a trumpet-head-shaped plate body for being plugged on a hole opening. The novel expansion-type yielding prestress grouting anchor rope provided by the invention not only has initial anchor force and a yielding effect, and good supporting and protecting effects when surrounding rocks are deformed, but also has the effect of reinforcing developed cracks and loosen surrounding rocks through grouting, but also can buffer to remove a part of pressure when the pressure is high.

Description

technical field [0001] The invention relates to a grouting anchor cable used in mine roadways, road tunnels and water conservancy culvert support projects. Background technique [0002] At present, a large number of anchor cables are used in mine roadway support, road tunnel support, water conservancy culvert support, mountain reinforcement, building pile foundation reinforcement and other projects to reinforce the surrounding rock, thereby improving the surrounding rock. The strength of its own pressure is an active form of support. [0003] However, in the case of cracks and loose rocks in the surrounding rock, the single anchoring effect of the anchor cable cannot effectively combine the surrounding rock into one body and increase the bearing pressure of the surrounding rock itself. Therefore, there are various grouting anchor cables on the market. The grouting anchor cable is composed of an anchor cable body, a tray and a locking device. The anchor cable body is a hollo...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/02E02D5/74
Inventor 文志杰蒋宇静张帅王刚朱祝武
Owner SHANDONG UNIV OF SCI & TECH
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