Pile hole callipers

A measuring instrument and bored pile technology, which is applied in the directions of surveying, earthwork drilling, wellbore/well components, etc., can solve the problems such as the lack of reliable and practical methods for the aperture, and the quality of foundation piles is affected, so as to achieve easy popularization and use, a huge social Economic benefits, simple and clear effect

Inactive Publication Date: 2003-03-19
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] During the drilling process of pile foundation construction, before concrete pouring, the diameter of the void hole may change due to soil deformation and other reasons. Whether the actual hole diameter can meet the design requirements directly affects the quality of the foundation pile. At present, the hole diameter There is no reliable and practical way to detect

Method used

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  • Pile hole callipers
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Examples

Experimental program
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Embodiment Construction

[0012] Such as figure 1 , figure 2 As shown, one end of several upper measuring bars 4 is fixedly hinged on the outer cylindrical surface of the lower end of measuring tube 1, and the other end of several upper measuring bars 4 is hinged with one end of corresponding number of lower side bars 5. Several lower measuring bars 5 The other end of each other is hinged with each other and is an umbrella structure. The measuring rope 1 passes through the measuring tube 3 and is connected with the other end of the lower measuring bar 5 at a movable hinge point. The upper end of the measuring tube 3 is equipped with a positioning rod 2 .

[0013] Said measuring tube 3 is an alloy pipe or a PVC pipe, which is divided into several sections and formed by threaded connection, and the measuring tube 3 of the top section is equipped with a positioning rod 2 . That is, there is a chute 9 on the side of the measuring tube 3 on the top section, such as Figure 5 a. Figure 5 As shown in b, ...

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Abstract

The present invention is one kind of pile hole calipers. Each of several pieces of upper test strips is hinged to the lower end of the test tube at its one end and hinged to one end of one corresponding lower test strip, and the outer ends of the lower test strips and hinged to form an umbrella shaped structure. The test rope is passed through the test tube and connected to the movable hinging point of the lower test strips. Some positioning rod is mounted to the upper end of the test tube. After the test tube is descended to the measured depth, test rope is pulled to drive upwards the lower ends of the lower test strips so that the hinged point between the upper and the lower test strips moves horizontally and the test strips expand to contact the hole wall.

Description

technical field [0001] The invention relates to a measuring device characterized by adopting a mechanical method, which is an aperture measuring device. Background technique [0002] During the drilling process of pile foundation construction, before concrete pouring, the diameter of the void hole may change due to soil deformation and other reasons. Whether the actual hole diameter can meet the design requirements directly affects the quality of the foundation pile. At present, the hole diameter There is no reliable and practical method for detection. Contents of the invention [0003] The purpose of the present invention is to provide a bored pile diameter measuring device, which can conveniently detect the diameter of the pile foundation construction borehole. [0004] The technical scheme that the present invention adopts is as follows: [0005] It includes a measuring rope, a positioning rod, a measuring tube, an u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/08
Inventor 王奎华胡昌斌谢康和
Owner ZHEJIANG UNIV
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