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End-expanded anchor rod and construction method thereof

A technology of anchor rod and body shape, which is applied in the direction of excavation, foundation structure engineering, sheet pile wall, etc., and can solve the problems of low pull-out force, poor gripping force between anchor body and anchor body, and small contact area between cement and anchor body and other problems, to achieve the effect of strengthening extrusion and expansion, good mechanical properties and strengthening strength

Pending Publication Date: 2021-03-30
BEIJING ZHONGYAN DADI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are: (1) The size of the anchoring force depends on the length and diameter of the anchoring section, and the nature of the soil in contact with the anchoring section. (2) Ordinary capsule anchors have the problems of small contact area between the cement and the anchor body, and poor grip between the anchor body and the anchor body

Method used

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  • End-expanded anchor rod and construction method thereof
  • End-expanded anchor rod and construction method thereof
  • End-expanded anchor rod and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as Figure 1~6 As shown, an end-expanded body anchor 1 is characterized in that it includes an anchor body 1, a No. 1 pressing mechanism 2, a capsule body 3, a locking plug 4, a No. 1 support rod 5, and a No. 2 support rod 6 , No. 3 support rod 7, grouting pipe 8, sleeve pipe 9, slurry discharge channel 10, end plate 11, No. 2 pressing mechanism 12, sliding sleeve 13, smooth pipe 14, jacking plate 15; the No. 1 The compression mechanism 2 includes a mechanism main body 21, a locking buckle 22, a sealing rubber ring 23, a ball valve 24, a support guide frame 25, a grouting channel 26, a compression plug 27, and a compression spring 28; There is a smooth tube 14, and the smooth tube 14 and the sliding sleeve 13 are connected by welding. The No. 2 pressing mechanism 12 includes a mechanism main body 21, a locking buckle 22, a slurry discharge channel 10, and an occlusal cavity. The slurry pipe 8 passes through the sliding sleeve 13 and is welded on the sliding sleeve...

Embodiment 2

[0047] Such as Figure 1~6 As shown, a construction method of an end-expanded body anchor 1 is characterized in that a kind of end-expanded body-expanded anchor 1 is used for construction, and the specific construction steps are as follows:

[0048] Step 1: Pre-test;

[0049] First, a pre-test is carried out on the ground, and water is injected into the sliding sleeve 13 through the grouting pipe 8. The initial water injection pressure is 0.2MPa~0.5MPa, and the water injection pressure is gradually increased to 1.0MPa~2.0MPa for 1min~2min, increasing step by step. Increase the water injection pressure by 0.5MPa at each level, and last for 1min~2min at each level, record the critical water injection pressure when the capsule 3 just enters the water, until the capsule 3 is fully inflated, when the total flow of water in the slurry discharge channel 10 reaches When injecting 90% of the water flow rate, record the maximum water injection pressure Q when the capsule body 3 expands...

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Abstract

The invention discloses an end-expanded anchor rod and a construction method thereof, and belongs to the technical field of anchoring. The end-expanded anchor rod comprises an anchor rod body, a firstpressing mechanism, a bag body, a locking plug, a first supporting rod, a second supporting rod, a third supporting rod, a grouting pipe, a sleeve, a slurry discharging channel, an end plate, a second pressing mechanism, a sliding sleeve, a smooth surface pipe and a jacking plate, wherein the first pressing mechanism comprises a mechanism main body, a locking buckle, a sealing rubber ring, a ballvalve, a supporting guide frame, a grouting channel, a pressing plug and a pressing spring; and the construction method of the end-expanded anchor rod comprises the following construction steps of pre-testing, drilling construction, anchor rod lowering, bag body grouting, prestress tensioning and construction ending. According to the end-expanded anchor rod and the construction method thereof, main power is applied to supporting rod pieces through slurry pressure, so that the reliability of full expansion of the bag body is guaranteed; the plurality of supporting rod pieces are arranged, so that the strength of an anchoring body is enhanced; and the bag body is made of a rigid material, so that the extrusion and expansion effect of the bag body on surrounding soil is enhanced.

Description

technical field [0001] The invention relates to the technical field of anchoring, in particular to an end-expanded anchor rod and a construction method thereof. Background technique [0002] With the increasing strength and depth of underground engineering development, deep foundation pit support has become a difficult problem that restricts the efficient and safe construction of high-rise buildings. After the excavation of the foundation pit, it is easy to cause large deformation of the side wall of the foundation pit and the soil slope, and the failure of the supporting structure. The safety problem of underground engineering is just more and more important. Traditional bolts have been widely used in water conservancy and hydropower, industrial and civil construction, transportation, municipal and other projects. [0003] The traditional friction anchor relies on the cohesive force and friction effect of the anchoring section on the surrounding soil to transmit the force...

Claims

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Application Information

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IPC IPC(8): E02D5/74E02D17/04E02D17/20
CPCE02D5/74E02D17/04E02D17/20
Inventor 宋伟杰李建平朱庆凯王伟涛刘光磊武思宇王思敬
Owner BEIJING ZHONGYAN DADI TECH CO LTD
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