Process for constructing soil anchor

A technology of anchor bolt construction and technology, which is applied in foundation structure engineering, sheet pile walls, excavation, etc., can solve the problems of grouting technology to be innovated, poor effective reinforcement range, easy grout leakage, etc., to save grouting cost, The effect of reducing the amount of grouting and grouting time and preventing the leakage of grout

Active Publication Date: 2012-07-04
POWERCHINA HUADONG ENG COPORATION LTD
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AI Technical Summary

Problems solved by technology

At present, the soil bolt grouting methods mainly include vacuum grouting, pressure grouting, high-density grouting, etc. These grouting methods generally use one-time grouting. The grouting effect can basically meet the requirements, but for the miscellaneous filling soil with relatively large pores and silty soil with weak strength, the effective reinforcement range of one-time grouting is not good, and there is the possibility of local grout leakage, so one grouting hole is often used during construction Injecting several tons of grout still has no effect, the reason is that grout leakage is very easy in the fill, and the grouting process needs to be innovated

Method used

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  • Process for constructing soil anchor
  • Process for constructing soil anchor

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Embodiment Construction

[0016] Such as figure 1 Shown, the construction steps of the present embodiment are as follows:

[0017] a. Mechanically form a hole with a diameter of 150mm, and rinse off the sediment at the bottom of the hole with clean water until the clean water returns from the orifice.

[0018] b. Place tie rod 1. In this example, tie rod 1 is made of HRB400 steel bar with a diameter of 28mm. Arrange a centering frame 2 at 2m, and then use the specification of 200g / m 2 The geotextile 3 wraps the tie rod 1 and the centering frame 2 to form a cylindrical cavity, and together with the grouting pipes (including the primary grouting pipe 5, the secondary grouting pipe 6, and the tertiary grouting pipe 7, the primary The grouting pipe 5 is located in the cylindrical cavity surrounded by the geotextile, and the secondary grouting pipe 6 and the tertiary grouting pipe 7 are both located between the geotextile and the hole wall. In this example, the secondary grouting pipe 6 and the tertiary g...

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Abstract

The invention relates to a process for constructing a soil anchor, and aims at providing a simple and convenient process for constructing a soil anchor to achieve the aims of improving the grouting diameter, ensuring the reinforcing effect, avoiding grout leakage, reducing grouting amount and reducing cost. The technical scheme provided by the invention comprises the following steps: a, forming and clearing pores; b, placing a pull rod and geotextile, uniformly and alternately distributing a group of centering frames on the pull rod, coating the pull rod and the centering frames into a cylinder by utilizing the geotextile, and sending the whole into the bottom of a borehole; c, carrying out primary grouting in the cavity of the cylinder which is defined by the geotextile; d, carrying out secondary grouting between the geotextile and the borehole wall; and e, carrying out tertiary grouting between the geotextile and the borehole wall. The process is mainly used for various water conservancy and hydropower engineering and municipal engineering.

Description

technical field [0001] The invention relates to a construction technology of a soil layer anchor rod, which is mainly applicable to various water conservancy and hydropower projects and municipal projects. Background technique [0002] Soil anchor technology is widely used in engineering such as foundation pit enclosure and slope support because of its simple construction and economical rationality. At present, the soil bolt grouting methods mainly include vacuum grouting, pressure grouting, high-density grouting, etc. These grouting methods generally use one-time grouting. The grouting effect can basically meet the requirements, but for the miscellaneous filling soil with relatively large pores and silty soil with weak strength, the effective reinforcement range of one-time grouting is not good, and there is the possibility of local grout leakage, so one grouting hole is often used during construction Injecting several tons of grout still has no effect. The reason is that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/74E02D5/76E02D17/20E02D17/04E02D15/04
Inventor 邢玉芳刘世明庄迎春胡士兵彭孔曙
Owner POWERCHINA HUADONG ENG COPORATION LTD
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