Asynchronous sliding device and foundation in-situ testing device and testing method thereof

A technology of in-situ testing and sliding device, applied in the testing of infrastructure, infrastructure engineering, construction, etc., can solve the problems of inaccurate test results, poor reliability, complicated operation, etc., and achieve the effect of ensuring reliability and maintaining stability

Pending Publication Date: 2018-07-06
NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual work, short round hot-rolled steel bars or short round hot-rolled steel pipes are easy to change the distribution state and shift under the action of horizontal thrust, which will cause the vertical jack to tilt and cannot maintain the stability of t...

Method used

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  • Asynchronous sliding device and foundation in-situ testing device and testing method thereof
  • Asynchronous sliding device and foundation in-situ testing device and testing method thereof
  • Asynchronous sliding device and foundation in-situ testing device and testing method thereof

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0031] Such as figure 1 and figure 2 As shown, the asynchronous sliding device for foundation in-situ testing according to the present invention includes a belt box body 21 and a box cover 23. The box body 21 is a flat square steel box surrounded by the bottom and side walls of the box body. The box body 21 is flat inside. Lay a layer of steel balls 22 with the same diameter, and the steel balls 22 are all over the box body 21, so that they can only roll in the box body 21 and cannot move horizontally relative to the box body 21. Lid 23 is a flat plate structure, and the diameter of steel ball 22 is 2~3mm larger than the height of the side wall of box body 21, so that there is a certain gap between the side wall of lid 23 and the box body.

[0032] In this example, the box body 21 and the ...

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Abstract

The invention provides an asynchronous sliding device and a foundation in-situ testing device and testing method thereof. By means of the device and method, it is guaranteed that a vertical jack doesnot incline when loads are horizontally applied, and therefore vertical loads are kept stable, and reliability of the test result is ensured. The asynchronous sliding device comprises a box body. A layer of steel balls the same in diameter is flatly laid in the box body, and the steel balls cannot horizontally move in the box body. The tops of the steel balls are higher than the top of the side wall of the box body, a box cover is arranged at the tops of the steel balls in a sliding manner, and the box cover is not in contact with the box body. In the asynchronous sliding device and the foundation in-situ testing device and testing method thereof, when a test piece horizontally moves under the pushing action of horizontal loads, friction resistance between the bottom face of the box body and the test piece is large, and the box body and the steel balls horizontally move together with the test piece; and friction resistance between the bottom of the vertical jack and the box cover is large, the friction coefficient between the steel balls and the box cover is relatively small, the steel balls roll in the box body, the vertical jack and the box cover are fixed, and therefore a horizontal jack and the vertical jack can independently work.

Description

technical field [0001] The invention belongs to the field of in-situ testing of industrial and civil building foundations, and relates to an asynchronous sliding device for horizontal bearing capacity tests of pile foundations with vertical loads and foundation direct shear tests, in particular to an asynchronous sliding device and an in-situ testing device for foundations and test methods. Background technique [0002] In the field of industrial and civil construction, many design parameters of the foundation need to be obtained through in-situ testing on site to ensure that the foundation design is reasonable, economical and safe. The horizontal bearing capacity of pile foundations and the friction coefficient of natural or artificial foundations are two very important design parameters. [0003] Chapter 6 of "JGJ106-2014 Technical Specifications for Building Foundation Pile Testing" stipulates the horizontal static load test of single piles in a free state (no load on th...

Claims

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Application Information

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IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 李党民郭葆胡昕王军牛志强杨生彬王延辉
Owner NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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