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Particle discrete element simulation method and equipment for plate load test of sandy soil foundation

A particle discrete element, plate load technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as difficulty in accurate simulation, and achieve the effect of reducing engineering test costs

Pending Publication Date: 2022-03-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] A main problem solved by the present invention is that the existing finite element numerical simulation method is difficult to accurately simulate the problem of the foundation plate load test of sandy soil with complex constitutive relations

Method used

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  • Particle discrete element simulation method and equipment for plate load test of sandy soil foundation
  • Particle discrete element simulation method and equipment for plate load test of sandy soil foundation
  • Particle discrete element simulation method and equipment for plate load test of sandy soil foundation

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Embodiment 1

[0050] Embodiment 1. This embodiment discloses a particle discrete element simulation method for a flat plate load test on a sandy soil foundation. For the implementation process of the invention, see figure 1 , which can be divided into six steps:

[0051] Step 1: Collect sand samples and carry out indoor geotechnical tests.

[0052]Collect the foundation soil, take the non-cohesive sandy soil——Three Gorges granite weathered sand as an example, carry out sieving test, accumulation angle test, relative density test, confining compression test and direct shear test, and obtain the gradation curve and accumulation of the sample. Angle of repose, compression characteristic curve, shear stress and normal displacement curve in the shearing process, etc. Due to the wide grading range of sand samples, in order to avoid size effects, the sand samples were divided into groups according to the limit particle size of fine sand, medium sand, coarse sand and gravel sand by using a sample ...

Embodiment 2

[0075] Embodiment 2 discloses a particle discrete element simulation device for a flat plate load test on a sandy soil foundation. The particle discrete element simulation device includes a memory, a processor, and is stored on the memory and can run on the processor. The particle discrete element simulation program for the flat plate load test of sandy soil foundation, the particle discrete element simulation program for the flat plate load test of sandy soil foundation is implemented by the processor as described in any one of the previous embodiments Steps in a granular discrete element simulation method for flat plate load tests on sandy soil foundations.

[0076] The particle discrete element simulation equipment for the flat plate load test of sandy soil foundation can run on computing equipment such as desktop computers, notebooks, palmtop computers, and cloud servers. The operable equipment of the particle discrete element simulation equipment for the flat plate load t...

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Abstract

The invention provides a particle discrete element simulation method for a sandy soil foundation plate load test. The particle discrete element simulation method is particularly suitable for sandy soil foundations such as coarse sand and gravelly sand with coarse particles. Microscopic parameters required by a simulation test are calibrated based on an indoor geotechnical test, the size of a foundation model is determined according to a Prandite foundation bearing capacity theory, the foundation model is constructed based on the calibrated microscopic parameters according to the grain composition and relative density of foundation soil and the determined model size, the model is simplified by adopting a semi-infinite space body hypothesis, and the model is constructed. On the basis that directional loads including vertical loads and inclined loads are applied to the foundation model step by step, under the given stability judgment standard, the settlement amount generated by the foundation under the action of each stage of load is recorded, and the test is stopped until the foundation model is damaged in the step-by-step loading process. The particle discrete element simulation method for the sandy soil foundation plate load test not only has academic research value, but also has considerable economic benefits.

Description

technical field [0001] The invention relates to the field of flat plate load test of sandy soil foundation. In particular, the invention relates to a particle discrete element simulation method and equipment for a flat plate load test of a sandy soil foundation. Background technique [0002] At present, the method of obtaining the bearing capacity of sandy soil foundation in engineering mainly adopts in-situ tests such as penetrating penetration or plate load. For penetrating (static or dynamic) methods, the empirical relationship between bearing capacity and cone tip resistance or hammering times determines the accuracy of test results. Different types of sandy soils correspond to different empirical formulas. Previously, the empirical formula needed to be recalibrated, which was time-consuming and laborious. In addition, because the mechanical properties of sandy soils are highly discrete, and the bearing capacity is sensitive to the resistance of the cone tip or the numb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/25G06F119/14
CPCG06F30/13G06F30/25G06F2119/14
Inventor 鲁志春苏爱军姚爱国龚松林刘清秉任兴伟董杉林宇仝德富甘昭文吴柳东
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)