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Method and equipment for setting rotary-jet steel strand ground anchor

A technology for steel strands and ground anchors, which is used in construction, sheet pile walls, infrastructure projects, etc., can solve the problems of increasing installation conditions, cost and time, increasing anchoring force, etc., and achieves simple and rapid construction and environmental impact. Small, low cost effect

Inactive Publication Date: 2010-07-07
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If ground bend, cross arm, soil anchor or driven pile is used for anchoring, it can only be applied to occasions with small anchoring force; if cast-in-place piles are used for anchoring, although the anchoring force can be increased, it also increases the installation cost Conditions, costs and timing

Method used

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  • Method and equipment for setting rotary-jet steel strand ground anchor
  • Method and equipment for setting rotary-jet steel strand ground anchor
  • Method and equipment for setting rotary-jet steel strand ground anchor

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Embodiment Construction

[0058] In this embodiment, the method for setting up a jet-sprayed steel strand ground anchor is as follows:

[0059] 1. See figure 1 , On the ground 45 where ground anchors need to be set up, install the drilling rig 40 and the slag cofferdam in the area where the drilling holes are piled up; install the double pipe rotary jet ground anchor bit 1 (such as Figure 2A , 2B , 2C, 2D), the double-pipe rotary jet anchor drill bit 1 has a central hole and a side shot hole 8 independently arranged;

[0060] 2. Drill according to the set drill pipe angle. While drilling, the mud pump passes through the slurry pipe 43, the infusion device 42 connected to the top of the drill pipe, the drill pipe 41, and the side of the double pipe rotary grouting ground anchor bit 1. The partial shot hole 8 sprays clay mud into the borehole for wall protection and slag removal;

[0061] 3. When the drill hole reaches the set depth, the drill bit 1 continues to rotate but does not advance, the mud pump stops...

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Abstract

The invention discloses a method and equipment for setting a rotary-jet steel strand ground anchor. The method is characterized by comprising the following steps of: under the condition of not digging up the ground, drilling deep in the ground by adopting a double-tube rotary-jet ground anchor drill; rotating and jetting high-pressure cement slurry; cutting, peeling, smashing and stirring foundation soil; chambering to form cement-soil mixed material blocks; top-pushing the steel strand out from a central pipe of the drill; dispersing steel strand anchor head steel wires with hooks and inserting the steel strand anchor head steel wires into the non-solidified cement-soil mixed materials; and rotating and withdrawing the drill to make the external part of the steel strand form a protective layer to form the ground anchor after the cement-soil mixed materials are solidified. Due to the adoption of the method and the equipment, the ground anchor is suitable for different foundation soil and anchoring angles and has the characteristics of having small occupied area and little influence on an environment, fully exerting material characteristic, greatly enhancing anchoring capacity and reducing cost. A novel anchoring method is provided for a large anchoring construction structure or equipment and the like.

Description

Technical field [0001] The invention relates to a method and equipment for setting ground anchors such as fixed engineering structures, equipment, etc., in particular to a method and equipment for setting a rotary jetting type steel strand ground anchor. Background technique [0002] At present, cables are used to fix engineering structures, equipment, etc., with ground braces, cross arms, soil anchors, or piles. If anchoring by ground sling, cross arm, soil anchor or driven pile, etc., it can only be applied to occasions where the anchoring force is small; if anchoring by cast-in-place piles, etc., although it can increase the anchoring force, it also adds Conditions, costs and time. Summary of the invention [0003] The purpose of the present invention is to provide a method and equipment for setting a jet-sprayed steel strand ground anchor. Without digging the ground, a double-pipe rotary jet ground anchor drill bit is used to drill into the depths of the formation to form a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D7/24E02D5/80
Inventor 汪哲荪朱大勇
Owner HEFEI UNIV OF TECH
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