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Self-anchored perforated steel pipe supporting device and anchoring construction method thereof

A support device and construction method technology, applied in excavation, foundation structure engineering, construction, etc., can solve problems such as poor foundation pit support stability, achieve good support stability, enhance anchorage, and increase frictional resistance

Pending Publication Date: 2020-12-29
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the anchoring effect of the existing bolt support structure and its relatively poor support stability for the foundation pit, the present invention provides a self-anchoring flower steel pipe support device and its anchoring construction method

Method used

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  • Self-anchored perforated steel pipe supporting device and anchoring construction method thereof
  • Self-anchored perforated steel pipe supporting device and anchoring construction method thereof
  • Self-anchored perforated steel pipe supporting device and anchoring construction method thereof

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Embodiment 1

[0044] combine Figure 1-Figure 3 , a kind of self-anchored flower steel pipe supporting device of the present embodiment, comprises flower steel pipe 1, grouting pipe 2 and anchor bar 3, wherein, the surface of flower steel pipe 1 is processed with perforation 101 for grout to pass through, anchor bar 3 It can be movably installed in the perforation 101, one end of which is located inside the flower steel pipe 1, and the other end protrudes to the outside of the flower steel pipe 1. The grouting pipe 2 is set inside the flower steel pipe 1 and can move freely along the length of the flower steel pipe 1. The surface of the grouting pipe 2 is provided with serrations 201 distributed along its length at intervals and matched with the anchor bars 3 .

[0045] Such as Figure 7 As shown, the anchor tendon 3 is composed of an anchoring section 301, a connecting section 302 and a load-bearing section 303. Type structure, the load-bearing section 303 pushes the anchor bars 3 to mo...

Embodiment 2

[0048] The structure of the self-anchoring flower steel pipe supporting device of this embodiment is basically the same as that of Embodiment 1, the main difference is that in this embodiment, the surface of the grouting pipe 2 is provided with multiple serrations 201 evenly spaced along its circumference, The surface of the flower pipe is provided with a plurality of anchor bars 3 corresponding to each sawtooth 201 respectively, and the distance between adjacent sawtooths in the same sawtooth 201 is 20-30cm, and the width of the sawtooth is 20-30cm, which is conducive to further ensuring The effect of supporting the surrounding foundation. Specifically, in this embodiment, the serrations 201 are cast iron serrations with a width of 20 cm, and the surface of the grouting pipe 2 is provided with three serrations 201 evenly and symmetrically distributed. Arranged evenly, the central angle between them is 120°, which can further increase the reverse gripping ability of the flower...

Embodiment 3

[0057] A kind of self-anchor flower steel pipe supporting device of this embodiment, its structure is basically the same as embodiment 2, and its difference mainly is: the sleeve pipe 4 of this embodiment adopts PVC pipe, and its thickness is 3-5mm, and flower steel pipe 1 is Cylindrical hollow pipe structure, and its other end opposite to the plug cap is processed into a conical structure, the cone angle is 105°-120°, so the support device of this embodiment can also be directly driven into the soil layer, and There is no need to use other external lead hole equipment for lead hole construction, which greatly reduces the construction period and improves construction efficiency (the specific principle: stir the soil layer in the forward direction through the cone angle, and then expand the anchor hole again through the anchor bar, so that the whole device can easily into the soil). The inner diameter and thickness of the flower steel pipe 1 are determined according to the draw...

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Abstract

The invention discloses a self-anchored perforated steel pipe supporting device and an anchoring construction method thereof, and belongs to the technical field of foundation pit supporting. The self-anchored perforated steel pipe supporting device comprises a perforated steel pipe, a grouting pipe and an anchor bar, wherein a through hole allowing grout to penetrate through is machined in the surface of the perforated steel pipe, the anchor bar is movably installed in the through hole, one end of the anchor bar is located in the perforated steel pipe, the other end of the anchor bar extends out of the perforated steel pipe, the grouting pipe is installed in the perforated steel pipe in a sleeved mode and can freely move in the length direction of the perforated steel pipe, and sawteeth which are distributed at intervals in the length direction of the grouting pipe and matched with the anchor bar are arranged on the surface of the grouting pipe. The self-anchored perforated steel pipesupporting device can be widely applied to deep foundation pit excavation supporting construction under geological conditions such as a sandy soil layer and a flowing soil layer, plays a very important role in foundation pit stabilization, can be repeatedly used, saves energy, protects the environment and meets the requirement of sustainable development.

Description

technical field [0001] The invention belongs to the technical field of foundation pit support, and more specifically relates to a self-anchored flower steel pipe support device and an anchoring construction method thereof, which are applicable to deep foundation pit excavation and support constructions such as municipal and housing construction. Background technique [0002] In the construction process of modern municipal engineering, housing engineering, etc., sometimes there are situations where the geological conditions on the site are quite different from the previous survey, which leads to the failure to implement the design plan. Among them, weak surrounding rock is a kind of rock mass often encountered in municipal and housing construction projects. Due to the poor self-stabilization ability of the weak surrounding rock, it is necessary to control the settlement and large deformation of the surrounding rock during the construction process to ensure construction safety...

Claims

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Application Information

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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 王瀚赵海峰夏庆秋
Owner CHINA MCC17 GRP
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