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Test device and test method for testing bearing performance of pile-end expanded head of statically-drilled rooted pile

A test device and a technology of expanding head, which is applied in foundation structure test, construction, foundation structure engineering, etc., can solve the problem that the static drilling and rooting pile cannot simulate the bearing performance of the pile end expanding head

Pending Publication Date: 2019-10-15
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing field tests and model tests cannot simulate the load-bearing performance of the pile end expansion head of static drilled and rooted piles.

Method used

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  • Test device and test method for testing bearing performance of pile-end expanded head of statically-drilled rooted pile
  • Test device and test method for testing bearing performance of pile-end expanded head of statically-drilled rooted pile
  • Test device and test method for testing bearing performance of pile-end expanded head of statically-drilled rooted pile

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] like Figure 4As shown, the present invention is a test device capable of simulating the relative compactness of different pile tip soils, different stress levels, different diameters of pile tip expansion heads and different grouting pressures for testing the bearing performance of pile tip expansion heads of static drilling and rooting piles, including a model Box 1, loading plate 2, reaction beam 3, loading motor 4, circular mold 5, air compressor 6 and slurry storage tank 7 are a total of seven parts.

[0038] The square model box 1 is welded by steel plates. One I-beam 1-1 is welded at the top, bottom and middle of the side of the model box, and two I-beams 1-1 are welded at the bottom of the model box to increase the overall rigidity of the model box. Case 1 side length and height are 2m; Described model case 1 interior fills the sandy soi...

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Abstract

The invention discloses a test device and a test method for testing the bearing performance of a pile-end expanded head of a statically-drilled rooted pile. The device comprises a model box, a loadingplate, a counter-force beam, a loading motor, a circular mold, an air compressor and a grout storage tank. The model box is formed by welding a steel plate and internally filled with sandy soil, a pore water pressure sensor, a soil pressure sensor and the circular mold are embedded into the sandy soil; the circular mold is formed by connecting and combining two semicircular aluminum alloy platesthrough bolts; the grout storage tank is a circular bucket storing a cement soil grout, and the grout storage tank, the air compressor and the model box are connected through a grouting pipe, and thegrouting pipe stretches into a reserved space of the circular mold; the loading plate is placed on the upper surface of a sandy soil layer, and an overburden pressure is applied through a jack to simulate different stress levels; and a statically-drilled rooted model pile in the model box can be loaded through the loading motor. The device is reasonable in structure and simple to operate, and provides an effective means for research for the bearing performance of the pile-end expanded head of the statically-drilled rooted pile.

Description

technical field [0001] The invention relates to a test device for studying the load-bearing performance of pile ends in the field of geotechnical engineering, in particular to a test device and a test method for testing the load-bearing performance of static drilling and rooting pile-end expansion heads, which can be used to study the difference in relative density of sandy soil and the expansion of pile ends. The pile-bearing characteristics of static drilled and rooted piles with different head diameters, different cement-soil strengths at pile tips, different grouting pressures, and different overlying pressures. Background technique [0002] With the rapid development of my country's urban construction, there have been many super high-rise buildings, high-speed railways, long-span bridges, and complex underground infrastructure projects, which require high foundation bearing capacity. As a main form of foundation, pile foundation is widely used in foundation engineering....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 周佳锦龚晓南黄晟
Owner ZHEJIANG UNIV
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