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Method for demolishing ultra high cast-in-place pile head

A technology of cast-in-situ piles and pile heads, which can be applied in the direction of sheet pile walls, buildings, and foundation structure engineering, etc., can solve the problems of low labor intensity, and achieve the effect of low labor intensity, practical operation, and smooth pile top surface

Active Publication Date: 2010-01-27
MCC SHIJIU CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to aim at the above-mentioned present situation, aiming to provide a kind of ultra-smooth construction that can fundamentally solve the problems of smooth surface of the pouring surface of the post-casting belt, without the need of demoulding and belt surface treatment, low labor intensity, high work efficiency, and fast construction progress. Breaking method of pile head of high cast-in-situ pile

Method used

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  • Method for demolishing ultra high cast-in-place pile head
  • Method for demolishing ultra high cast-in-place pile head
  • Method for demolishing ultra high cast-in-place pile head

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Embodiment Construction

[0019] The invention considers the problems of simple and practical operation and high safety factor in demolition. The ultra-high pile head adopts the procedures of chiseling away the protective layer of pile reinforcement from above the design pile top elevation, cutting off the pile reinforcement, drilling and demolishing, and pulling to the pile head.

[0020] Below with reference to accompanying drawing, describe concrete operation step of the present invention in detail:

[0021] 1) Excavate the pile head of the super-high cast-in-place pile, and measure the height of the broken pile head:

[0022] ① After the construction of the concrete bored pile is completed, the earthwork of the foundation pit is excavated to the bottom elevation of the cushion layer, and the super-high pile head 1 is exposed. The design pile top and the elevation of the broken pile head are measured and marked with red paint.

[0023] ②Select three points on the ground along the circumference of th...

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Abstract

The invention relates to a method for demolishing an ultra high cast-in-place pile head. Operation steps include excavating an ultra cast-in-place pile head after pile driving construction is completed, measuring drawn lines to determine the part to be demolished, binding pile block and fixing a hemp rope, chiselling pile longitudinal reinforcement cover, cutting off longitudinal steel and spiral stirrup, demolishing a pile hole, inserting a combination steel wedge side block in to the hole, inserting a combination steel wedge intermediate block into the middle of the steel wedge side block and driving the intermediate block into the steel wedge side block forcibly and gradually, the ultra high pile head is broken under extrusion force, and the pile head is pulled down by part of the fixed hemp rope. The invention is simple and convenient in procedure, practical in operation and low in labour intensity when being applied, construction speed is fast, construction is safe, cost is low, and the pile top surface of the demolished ultra high pile head is flat. The invention is successfully applied to construction of demolishing ultra high pile head of new 2# blast furnace overhaul modification work foundation of Wuhan Iron and Steel Corporation and 4# coke oven foundation of Nanjing Meishan Iron and Steel Corporation, wherein the pile is cast-in-place reinforced concrete bored pile.

Description

technical field [0001] The invention relates to a method for removing a pile head of a super-high cast-in-situ pile. Background technique [0002] With the continuous advancement of building foundation treatment technology, the construction of various large-diameter mechanical hole-forming piles is becoming more and more common. Due to poor geological conditions or the characteristics of pouring underwater concrete piles on soft soil foundations, it is often difficult to There will be super-high pile heads. The traditional method of removing pile heads uses pneumatic picks to chisel the pile heads from top to bottom bit by bit. This method has the following disadvantages. One is labor-intensive and the other is construction speed. Slow, the third is the high risk factor, and the fourth is that the top of the pile is prone to unevenness or irregularities around the pile head after the pile head is removed. Contents of the invention [0003] The purpose of the present inven...

Claims

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Application Information

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IPC IPC(8): E02D9/00E02D5/34
Inventor 贾良徐字平孙斌
Owner MCC SHIJIU CONSTR
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