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Method for measuring pipe pile swing resulted from foundation ditch digging

A technology of pipe piles and foundation pits, which is applied in foundation structure tests, foundation structure engineering, construction, etc., and can solve problems such as long preparation period, high cost, and influence on accuracy

Inactive Publication Date: 2005-11-02
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is expensive, the preparation period is long, and the accuracy is affected by the damage of the strain test sensor due to pile making, pile driving and long time in the underground wet environment

Method used

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  • Method for measuring pipe pile swing resulted from foundation ditch digging
  • Method for measuring pipe pile swing resulted from foundation ditch digging

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] see figure 1 , figure 2 , before the deep foundation pit excavation of the wide and heavy plate rolling mill and continuous casting in a steel factory, a number of concrete pipe piles 2 were selected near the slope of the foundation pit. The height of the soil core is about -40~-50 meters underground. Insert the inclinometer pipe 1 into the pile hole to the top of the soil core. In order to make the inclinometer pipe 1 and the concrete pipe pile 2 move sideways and deform synchronously and have little influence on the stiffness of the pipe pile 2, the inclinometer pipe 1 and the pipe pile 2 Filling material 3 is poured between the holes. After comparing materials such as concrete, gypsum and yellow sand, yellow sand was selected as filling material 3. Before excavating the foundation pit, measure the initial position of the inclinometer pipe 1 at different depths, and then measure the changing position of the inclinometer pipe 1 at different depths at any time. The ...

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Abstract

The invention relates to the investigation technology of civil engineering, in particular the measurement of the side shift of post resulted from excavating basic hole. Said method comprises following steps: (1) selecting posts which are need detected before excavating the basic hole, and clear the soil core in the post; (2) inserting the gradient pipe into the hole of post; (3) filling the filling material between the gradient pipe and the hole of post to make the gradient pipe side shift and distort simultaneously with the post; (4) measuring the initial position of gradient pipe in different depth before the distortion of post resulted from excavating the basic hole, and the measured value is initial value; (5) measuring the altered position of gradient pipe in different depth momentarily after excavating the basic hole, and the measured value is the altered value; (6) subtracting the initial value from the altered value to attain the side shifting value of post.

Description

(1) Technical field [0001] The invention relates to survey technology in geotechnical engineering, in particular to a measurement method for pipe pile lateral movement caused by foundation pit excavation. (2) Background technology [0002] In the construction of important industrial and civil buildings, the construction process of piling first and then excavating the foundation pit is usually adopted. After the excavation of the foundation pit, the pipe piles used as the engineering foundation will move sideways. The current pipe piles generally use concrete pipe piles. In order to measure the variation of the lateral displacement of the concrete pipe pile with the depth, the existing measurement methods are as follows: (1) Use the gyroscope to move along the inner hole wall of the pipe pile to measure the variation of the lateral displacement of the pipe pile with the depth. The cost of this method is high, and it is not convenient for repeated detection, and the accuracy i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
Inventor 王怀忠程季康迟荣滨郭恒明徐常庆张涛
Owner BAOSHAN IRON & STEEL CO LTD
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