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Bearing capacity evaluation method of sandy soil box

An evaluation method and technology of bearing capacity, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of difficult operation of the main installation project of the pipeline, leakage of liquefied gas, affecting the pipeline, etc., to reduce the impact, The effect of reducing the damage of buried pipelines and evaluating the results accurately

Inactive Publication Date: 2021-04-06
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, this makes the operation of the main pipeline installation project more difficult and slow, and in the event of an earthquake disaster or ground subsidence and other emergencies, the pipeline will still be affected, causing liquefied gas leakage or oil leakage, etc.

Method used

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  • Bearing capacity evaluation method of sandy soil box
  • Bearing capacity evaluation method of sandy soil box
  • Bearing capacity evaluation method of sandy soil box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Assume that there is a fire engine load q=20kN / m acting on the upper part of the sand box 2 , It is confirmed by geotechnical engineering survey that the place where the sand box is buried at the ground fissure is cohesive soil. its severity r 1 =18kN / m 3 , the thickness of the soil above the sand box soil layer is h 1 = 3m, the soil weight r within the design range of the height of the sand box 2 =20kN / m 3 , corresponding to the thickness of the soil layer h 2 =2.31m, the width of the sand box is b=2m, the length direction of the sand box is calculated as 1m, and the self-weight of the soil above the sand box within the range of the soil layer is G 0 , the self-weight within the scope of the sand box is G 1 , the buried depth of the sand box is d=2.5m, and the characteristic value of the bearing capacity of the basement is obtained from geotechnical engineering investigation f ak =160kPa, porosity ratio e=0.8, liquid index I L = 0.78.

[0086] It is calculate...

Embodiment 2

[0092] The buried depth of the sand box is d, the width of the sand box is b, the length of the sand box is l, the height of the sand box is H, and the bulk density of the soil on the top of the sand box is r 1 =18kN / m 3 , the overall bulk density of the sand box r 2 =20kN / m 3 (Including the total bulk density of sand and water inside the sand box). The self-weight of the soil above the sand box within the soil layer is G 0 , the self-weight within the scope of the sand box is G 1 , the buried depth of the sand box is d=4m.

[0093] It is calculated by the following formula:

[0094]

[0095] G 0 =bld×18=18bld

[0096] G 1 =blH×20=20blH

[0097] therefore,

[0098] Among them, the height H of the sand box is 3m, and the characteristic value f of the foundation bearing capacity obtained from the geotechnical engineering investigation is ak =160kPa, porosity ratio e=0.8, liquid index I L = 0.78.

[0099] f a =f ak +η b γ(b-3)+η d gamma m (d-0.5)=160+1.6×18...

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Abstract

The invention relates to the technical field of pipeline engineering safety evaluation, and concretely relates to a bearing capacity evaluation method for a sandy soil box. The method is characterized by comprising the following steps: determining the position of a ground fracture through geotechnical engineering investigation data, and determining geological parameters above the ground fracture; collecting the size of a sandy soil box which is buried in a ground fracture position and used for protecting the buried pipe; and according to the geological parameters determined in the following steps and the size of the sand box, obtaining the corrected foundation bottom surface bearing capacity fa of the sand box according to the following formula. The evaluation and calculation method is simple, the operation is less, the evaluation result is accurate, and an evaluation basis is provided for quakeproof popularization of the sandy soil box.

Description

technical field [0001] The invention relates to the technical field of pipeline engineering safety evaluation, in particular to a method for evaluating the bearing capacity of a sand box. Background technique [0002] One of the important reasons leading to the damage of buried pipelines is the liquefaction of the site soil. The buried pipelines are an important part of the urban lifeline system engineering, which is responsible for the important functions of industrial and agricultural production and urban life. The failure of buried pipelines caused by liquefaction has important practical effects. [0003] When the seismic wave acts on the liquefaction site, it will cause horizontal and vertical damage to the buried pipeline. At the same time, the liquefaction of the sand will also cause the pipeline to float up and deform in the vertical plane. In severe cases, the pipeline will be damaged due to the buoyancy. out of the ground. Especially when the buried pipeline is in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F119/14
CPCG06F30/13G06F2119/14
Inventor 代建波吕刚翁光远宋梅梅张煜敏
Owner XI'AN PETROLEUM UNIVERSITY
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