A Method of Determining the Elevation of Drilled Cast-in-situ Pile Using Laser Line Meter

A technology of bored piles and laser liners, which can be used in sheet pile walls, foundation structure tests, construction, etc., can solve the problems of increasing professional investment, affecting construction progress, and wasting manpower, so as to avoid leveling errors , Improve construction efficiency and save construction cost

CN104153353BActive Publication Date: 2016-03-30CHINA RAILWAY SIXTH GRP TIANJIN RAILWAY CONSTR +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-03-30

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Abstract

The invention discloses a method for determining the elevation of a bored pile through a cross line laser. The method includes the steps that an elevation control pile is arranged on the ground; marks are marked on a drill rod and a sliding staff; the cross line laser is used for controlling the elevation of the bottom of a drill hole and the elevation of the top of the bored pile. The method has the advantages that leveling work is not needed, and therefore efficiency is improved; data calculation is not needed, and therefore time is shortened; a measuring line does not need to be used for measuring the depth of the bottom of the hole, and therefore the number of employed measuring professionals is greatly decreased. A supervision acceptance procedure can be finished at night, and therefore construction is accelerated. In a word, according to the method, the elevation of the bored pile is easy, convenient and rapid to achieve effortlessly, labor is saved, the construction cost is reduced, the construction is accelerated, and construction efficiency is greatly improved.
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Description

technical field

[0001] The invention belongs to the technical field of civil construction, and in particular relates to a method for determining the elevation of bored piles by using a laser line thrower. Background technique

[0002] In the traditional bored pile construction, the casing must be buried in advance at the hole, its function is to control the hole position of the bored pile; the second is to control the elevation of the bottom of the hole after drilling by measuring the elevation of the top surface of the casing. That is to control the drilling depth. Because the casing needs to be buried before each pile is driven in, and the elevation of the casing cannot be accurately controlled, so the top elevation of each casing of each pile is different, so it is necessary to measure the height of each pile casing The elevation of the top surface, and the depth of driving each pile relative to the top surface of the casing through calculation. However, this traditiona...

Examples

Embodiment Construction

[0040] The method for determining the elevation of bored piles provided by the present invention using a laser line thrower will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Such as figure 1 — image 3 As shown, the method for determining the elevation of bored piles provided by the present invention using a laser line instrument includes the following steps carried out in order:

[0042] 1) First, vertically set the elevation control pile 1 on the ground close to the construction range of the bored pile, and mark 2 on the elevation control pile 1 as the absolute elevation;

[0043] 2) Before drilling, the first section of drill pipe 4 with the drill bit 3 and the subsequent multi-section drill pipe 5 are sequentially connected to form the drill pipe 6 at the construction site, so that the length of the entire drill pipe 6 is longer than that of the borehole filling The sum of the hole bottom elevation of the p...