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Method and equipment for setting static exploration protection pipe for deep hole static penetration test in shallow part of soil layer

A technology of static penetration and soil layer, which is applied in the field of foundation soil survey, construction, infrastructure engineering, etc. It can solve the problems of time-consuming, laborious and low efficiency, and achieve the effect of improving construction efficiency and saving costs

Active Publication Date: 2011-11-30
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This method requires two sets of equipment to enter the field and use them alternately, which is time-consuming, laborious and inefficient.

Method used

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  • Method and equipment for setting static exploration protection pipe for deep hole static penetration test in shallow part of soil layer
  • Method and equipment for setting static exploration protection pipe for deep hole static penetration test in shallow part of soil layer

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] A specific embodiment of the method for setting a deep hole static penetration test static exploration protection pipe in the shallow part of the soil layer of the present invention comprises the following steps:

[0028] 1) Set slips at the lower part of the vertical shaft of the CPT machine;

[0029] 2) Pass the static detection pipe through the slips;

[0030] 3) Lift the vertical shaft of the static penetrating machine;

[0031] 4) Clamp the static detection protection pipe with slips;

[0032] 5) Press down the vertical shaft of the static CPT machine.

[0033] When the static sounding protection pipe fails to be pressed into the soil layer of predetermined depth, the present invention may also include the following steps:

[0034] 6) The slips loosen the static detection protection pipe;

[0035] 7) Raise the vertical shaft of the static penetrating m...

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Abstract

The invention relates to a method and equipment for arranging a static penetration protection pipe of a deep hole static cone penetration test in shallow soil. The static penetration protection pipe is pressed in the soil by utilizing the power of a static cone penetration machine, therefore, a slip for clamping the protection pipe is arranged at the lower part of the upright shaft of the static cone penetration machine; the protection pipe is downwardly pressed by utilizing the self power of the static cone penetration machine so that the protection pipe is sent into the soil; in the deep hole static cone penetration test, a drilling machine is not utilized to arrange the protection pipe any longer; one set of equipment can be prevented from being conveyed to a construction field; two sets of equipment are unnecessary to be used alternately any longer; the construction efficiency is greatly increased; and the cost is saved.

Description

technical field [0001] The invention relates to a deep hole static penetration test, in particular to a method and equipment for arranging a deep hole static penetration test static protection pipe in the shallow part of the soil layer. Background technique [0002] The static penetration test is an in-situ test method that presses a conical probe with a certain specification into the soil at a uniform speed by means of machinery to measure the resistance of the probe and other parameters. [0003] During the penetration process of the deep hole static penetration test, the probe rod is often deflected or even broken. This is mainly because the probe is prone to deflection as the penetration depth increases; if hard soil is encountered during the downward pressure process, the penetration resistance increases, the probe rod bends, and eventually the rod breaks. Setting static protection pipes in the shallow part of the static penetration test hole is one of the main methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00
Inventor 徐敏生沈日庚
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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