Geotechnical test pressurizing device and experimental method

A pressurizing device and geotechnical testing technology, applied in the direction of measuring device, using repeated force/pulsation force to test the strength of materials, instruments, etc., can solve the problems of limited confining pressure, inability to truly respond, high cost, etc., to prevent fatigue deformation , Strong flexibility and operability, small displacement effect

Pending Publication Date: 2022-02-01
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

The large-scale model test is expensive, and the conventional small-scale 1g model test exerts very limited confining pressure on the test pile. Considering the nonlinear stress-strain of the soil, the cyclic loading characteristics of the pile foundation obtained by the small-scale model test cannot be realistic. Cyclic loading characteristics of pile foundation under high confining pressure under actual ground response conditions

Method used

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  • Geotechnical test pressurizing device and experimental method

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Embodiment approach

[0045] A pressure device for geotechnical experiments, such as figure 1 As shown, it includes a trough-type reaction force pedestal 1 for balancing the reaction force generated by the load applied to the specimen, and the groove rails 2 are arranged in parallel along the long-side direction.

[0046] Such as figure 1 As shown, there is a load component on the trough reaction force base 1, so that the test piece can be easily pressed into the test box through the load component. The load assembly includes a support part 3 connected to both sides of the trough-type reaction force pedestal 1 , a vertical load part 4 detachably connected to the support part 3 , and a pressing device 5 .

[0047] Such as figure 1As shown, the support part 3 is arranged on the groove rails 2 on both sides of the grooved reaction force pedestal 1. The support part 3 includes a bottom fixing plate 30 on the groove rail 2 on each side, and several bottom fixing plates 30 are welded and connected. Fr...

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Abstract

The invention discloses a geotechnical test pressurizing device and an experimental method, belongs to the field of geotechnical test pressurizing devices and experimental methods, and aims to solve the problem that stress states and consolidation conditions of soil layers with different depths are difficult to simulate in a geotechnical model test. According to the technical schemes, the device is characterized by comprising a support which is of an annular cylindrical structure; inflatable confining pressure loading devices used for applying confining pressure are placed on the support at certain intervals in the vertical direction; a valve core is arranged at the upper part of each inflatable confining pressure loading device; and a tightening type inflating valve is arranged on each valve core. The device further comprises a load assembly, and the load assembly comprises a downward pressing device and a load component used for fixing the downward pressing device. According to the geotechnical test pressurizing device and the experimental method, static force loading or displacement and force cyclic loading of different waveforms is realized by utilizing the downward pressing device, and lateral confining pressure is provided by means of air bags so as to adapt to simulation tests of different models and different working conditions.

Description

technical field [0001] The invention relates to the field of geotechnical test equipment, in particular to a geotechnical test pressure device and an experimental method. Background technique [0002] The rapid economic and social development and the improvement of the modernization of design and construction have promoted the construction of high-speed railways, large bridges, oil drilling platforms, wind turbines and other infrastructure. In these engineering facilities, the pile foundation is widely used due to its high bearing capacity, small deformation and high degree of construction mechanization. However, during the service life of the pile foundation, it not only bears the self-weight load from the superstructure, but also is subjected to the long-term effects of significant periodic vertical cyclic loads such as vehicle traffic load and self-running. This long-term cyclic load will inevitably affect the bearing characteristics of the pile foundation. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/36G01N3/02
CPCG01N3/36G01N3/02G01N2203/0005G01N2203/0019G01N2203/0676
Inventor 刘开富潘云锋徐越栋黄棁郑志均吴大志
Owner ZHEJIANG SCI-TECH UNIV
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