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Operation method for supporting soft border by using earth slope nails

A slope soil and protection technology, which is applied in the direction of foundation structure engineering, sheet pile wall, excavation, etc., can solve the problem that the support mechanism and the slope cannot form a whole, cannot effectively prevent the uplift of the bottom plate and the instability of the slope foot, and it is difficult to ensure Solve problems such as slope stability, achieve construction civilization, improve physical and mechanical properties, improve mechanical strength and engineering stability

Inactive Publication Date: 2006-04-19
曾宪明
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Problems solved by technology

As a new type of support technology, the soil nail wall construction method has also been applied in soft soil slope engineering in recent years. Because the support height is the same as the vertical height of the slope, it cannot effectively prevent the bottom plate from uplifting and the slope toe failure. Stable (such as figure 1 As shown), in addition, the soil nails of the soil nail wall method do not consider the welding and fixing with the steel mesh, and the soil nails do not apply prestress, so the support mechanism and the slope cannot form a whole, so it is difficult to ensure the stability of the slope

Method used

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  • Operation method for supporting soft border by using earth slope nails
  • Operation method for supporting soft border by using earth slope nails
  • Operation method for supporting soft border by using earth slope nails

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Embodiment Construction

[0022] In conjunction with accompanying drawing, further illustrate embodiment of the present invention as follows:

[0023] Described soft soil slope support engineering method comprises the following steps:

[0024] 1. First measure the construction site for setting out;

[0025] 2. To make the anchor pipe 8, make the front end of a φ46mm common commercially available steel pipe wedge-shaped, and evenly arrange appropriate amount of grouting holes on the pipe body. The length of the anchor pipe is greater than the vertical height of the slope. For the convenience of operation, the anchor pipe can also be divided Several sections shall be welded during on-site construction.

[0026] 3. Arrange the anchor pipe 8. Place one anchor pipe 8 at equal intervals of 40cm according to the setting-out position, and drive it into the ground with a high-pressure air hammer; Underground, and so on, until the required length is reached.

[0027] 4. Perform pressure-controlled grouting i...

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Abstract

An earth nail method for protecting the soft-earth slope includes measuring and drawing lines, vertically driving the anchor tubes with grouting hole into earth, grouting, vertically digging down along the internal side of each anchor tube, arranging net, spraying cement, slurry, driving earth nails in the earth, grouting, rigidly fixing the earth nails, net ribs and anchor tubes, and spraying concrete. Said steps are repeated layer by layer undtil foundation. The drain ditch is dug on the foundation.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and mainly proposes a soil nailing support method for soft soil slopes. Background technique [0002] Traditional soft soil slope engineering generally adopts construction methods such as ground connection wall and mixing pile, which leads to frequent engineering accidents, and its success rate only accounts for about 30%. The reason why such a situation occurs is that passive support methods are used in these methods. Soft soil has the characteristics of high water content, high compressibility, low water permeability, low mechanical strength, small boundary height, and poor stability; as a bad geological body, it has a special failure mode, that is, "drum failure mode". Therefore, the above-mentioned traditional support method is as attached figure 1 As shown, when excavating the free surface and driving the anchor rod 3 into the soft soil for grouting, the plastic flow line ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20E02D5/76
Inventor 曾宪明刘春亮赵强文高原梁仕发杜宁波
Owner 曾宪明
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