Large tonnage pile static loading test ballasting platform counter-force device and mounting method thereof

A reaction device and static load test technology, which is applied in the test of basic structure, basic structure engineering, construction, etc., can solve the problems of large consumption of counterweight materials, difficulty in moving, and difficulty in meeting the strength requirements, so as to reduce loading and Transportation cost, installation method is simple and safe, and the effect of solving strength and deformation

Active Publication Date: 2011-03-16
YUNNAN INST OF BUILDING RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the face of a large number of pile foundation static load test projects of thousands of tons, the traditional method of placing sandbags, concrete prefabricated blocks and other counterweights on the base of the reaction force device is becoming more and more difficult to realize technically.
First of all, the base of the reaction force device is huge and heavy, not only the cost is high, the strength is difficult to meet the requirements, and the deformation problem is difficult to solve, but also it is very difficult to move the huge and heavy reaction device base or the large components that construct the reaction force device base to the construction site. , high handling cost and unsafe
Secondly, the material consumption of making counterweights is large, wasting resources, and the cost of loading and transporting counterweights is also high
In addition, the structural performance of the loading reaction device and the resulting uncontrollable factors have brought great safety hazards to the test

Method used

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  • Large tonnage pile static loading test ballasting platform counter-force device and mounting method thereof
  • Large tonnage pile static loading test ballasting platform counter-force device and mounting method thereof
  • Large tonnage pile static loading test ballasting platform counter-force device and mounting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A construction project needs to carry out a 5000-ton pile foundation static load test, and it is required to use a steel-concrete load-bearing platform to form a counterforce device for the ballast platform.

[0030] The steel-concrete load-bearing platform is manufactured using the existing technology, and the geometric dimensions (length×width×thickness) of the steel-concrete load-bearing platform are 4×4×0.5(m 3 ), the frame of the steel-concrete load-bearing platform and the load-bearing bars radiating outward from the central countersunk keyhole are made of industrial steel. After welding and forming, reinforced steel bars are added, and high-strength commercial concrete is poured and cured.

[0031] Using existing technology to make counterweight box 7 and static load-bearing support 6: according to the geometric dimensions of the steel-concrete load-bearing platform, the geometric dimensions (length × width × height) of the supporting counterweight box are also se...

Embodiment 2

[0040] A construction project needs to carry out a 7000-ton pile foundation static load test, and it is required to use a steel-concrete load-bearing platform to form a counterforce device for the ballast platform.

[0041] The fabrication of the device is the same as in Example 1.

[0042] The installation method is as follows:

[0043] (1) Foundation treatment of static bearing bearings. According to the different conditions of the construction site, it can be treated according to the method or combination of multiple methods stipulated in the industry standard of the People's Republic of China "Technical Regulations for Building Foundation Treatment" (JGJ 79). Design area of ​​reaction device (400m 2 ) is required to reach 25T / m 2 No settlement deformation occurs.

[0044] (2) Static load bearing installation. According to the structure of the load-bearing platform reaction force device, on the treated flat foundation, the load-bearing supports are arranged in order fr...

Embodiment 3

[0050] A construction project needs to carry out a static load test of 10,000 tons of pile foundation, and it is required to use a steel-concrete load-bearing platform to form a pressure platform reaction device or to use a steel-concrete load-bearing platform to form an anchor-pressure joint reaction device.

[0051] The fabrication of the device is the same as in Example 1.

[0052] The installation method is as follows:

[0053] (1) Foundation treatment of static bearing bearings. According to the different conditions of the construction site, according to the method stipulated in the industry standard "Technical Regulations for Building Foundation Treatment" (JGJ 79) of the People's Republic of China and combined with reinforced CFG pile treatment (the CFG pile is considered to be 5m deep), according to the static load test tonnage of the pile foundation ( 10,000 tons) and the design area of ​​the ballast platform reaction force device (400m 2 ), and considering the stru...

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Abstract

The invention discloses a large tonnage pile static loading test ballasting platform counter-force device and a mounting method thereof. In the device, rectangular steel-concrete bearing bedplates with frames (1a) are staggered and stacked to form an inverted pyramidal cascade ballasting platform counter-force device seat (2); the center of each steel-concrete bearing bedplate is provided with a sunk lock hole (3), and four corners of the steel-concrete bearing bedplate are provided with a quarter sunk lock hole respectively; and adjacent steel-concrete bearing bedplates are in limited connection through a latch (4) in the horizontal direction, and are fixed through bolts through the sunk lock holes or anchored by a steel cable in the vertical direction. The mounting method comprises the following steps of: treating a foundation, and mounting a static bearing pedestal; assembling the ballasting platform counter-force device seat; and stacking cuboid ballast boxes on the ballasting platform counter-force device seat in a staggered way to form a ballasting platform counter-force device counterweight body. Construction members for erecting a piled weight platform are convenient to manufacture and transport, can be erected into the piled weight platform in the field of the building site; the structure is simple and safe, and the manufacturing cost is low; and the mounting method is simple and safe, and is easy to implement.

Description

technical field [0001] The invention relates to the technical field of a construction pile foundation static load test device and an installation method. Background technique [0002] Pile foundation static load test is one of the important contents of pile foundation quality inspection. The so-called pile foundation static load test refers to applying axial pressure, axial upward pullout force on the top of the pile step by step, or applying horizontal force at the same elevation of the bottom surface of the pile foundation cap according to the use function of the pile, and observing the corresponding detection of the pile. According to the settlement, uplift displacement or horizontal displacement of a point over time, determine the corresponding vertical compressive bearing capacity of a single pile, vertical uplift bearing capacity of a single pile or single pile Test method for horizontal bearing capacity. [0003] The existing pile foundation static load test usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
Inventor 彭彪李继荣刘光宗杨永菊
Owner YUNNAN INST OF BUILDING RES
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