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Cone penetration test detection method for cement mixing pile with preset guide pipe

A technology for cement mixing piles and static penetration, which is applied to sheet pile wall, foundation structure test, construction, etc., can solve the problems of incomplete detection of the pile body, easy deflection of the probe to exit the pile, etc., and achieves convenient implementation and low cost. Low, guaranteed angle effect

Active Publication Date: 2013-04-17
HOHAI UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The conventional static penetration method is used to detect cement mixing piles, the probe is easy to deflect and the pile cannot be completely detected

Method used

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  • Cone penetration test detection method for cement mixing pile with preset guide pipe
  • Cone penetration test detection method for cement mixing pile with preset guide pipe

Examples

Experimental program
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Embodiment 1

[0030] see figure 1 and figure 2 As shown, the static penetration detection method of the pile quality of the mixing pile with preset conduits of the present invention is to insert a small-diameter PVC pipe 2 in the center of the pile body in a short time after the construction of the cement mixing pile 1 is completed, wherein the PVC pipe 2 The diameter is 40±1mm, forming a reserved detection hole. At the specified age, the conventional static penetrating method is used to continuously detect the strength of the pile body, wherein the specified age of the cement mixing pile in the present invention is 7 days. The method of presetting the conduit is to insert the PVC pipe 2 with a closed bottom vertically into the PVC pipe 2 with the bottom closed within half an hour after the construction of the cement mixing pile 1. The cement soil has not yet solidified and is still in a liquid state in the center of the pile body. The PVC pipe 2 becomes the reserved inspection hole of t...

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Abstract

The invention discloses a cone penetration test detection method for a cement mixing pile with a preset guide pipe. The method includes the steps: firstly, perpendicularly inserting a PVC (polyvinyl chloride) pipe with the bottom closed into the center of the a cement mixing pile within half an hour after cement mixing pile construction, so that a reserved detection hole is formed; and secondly, continuously detecting the pile body strength of the cement mixing pile by means of cone penetration test detection when the cement mixing pile reaches a certain age. The invention further discloses a cement mixing pile body quality evaluation method. The cone penetration test detection method for the cement mixing pile with the preset guide pipe retains the advantages of convenience in implementation, rapidness and low cost, overcomes the defect that a probe is easy to deflect out of the pile so as to be incapable of detecting the pile body completely, and is capable of effectively guaranteeing the angle of the probe.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a static penetration detection method of a cement mixing pile with a preset conduit. Background technique [0002] Cement mixing pile is a commonly used reinforcement scheme in soft soil foundation treatment engineering, and pile detection is an important quality link. The current specification stipulates that the testing of cement mixing piles is mainly based on the compressive strength test of drilled core samples, and the sampling ratio is 3%-5%. The core-pulling detection method has a long period, low efficiency, and high cost, and cannot achieve the purpose of quickly detecting the quality of the mixing pile. [0003] The static penetration test can obtain continuous strength characteristic information of the test object, and has the advantages of convenient, fast and low cost implementation. The conventional static penetration method is used to detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00E02D5/46
Inventor 李国维张国炳姜微魏曙红周洋
Owner HOHAI UNIV
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