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Method for calculating soil pressure of limited soil

A calculation method and earth pressure technology, applied in the field of foundation soil survey, construction, infrastructure engineering, etc., can solve the problems of cost waste and achieve the effect of good promotion and application value

Inactive Publication Date: 2017-05-10
南昌市政公用集团有限公司 +2
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Problems solved by technology

This will cause unnecessary waste in costs

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  • Method for calculating soil pressure of limited soil
  • Method for calculating soil pressure of limited soil
  • Method for calculating soil pressure of limited soil

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Embodiment Construction

[0020] A method for calculating the earth pressure of a finite soil body proposed by the present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments. In a river-crossing tunnel project in a certain province and city, there is a large height difference between the foundation pit on the east bank of a ramp and the foundation pit below the bank, and the piled soil around the foundation pit on the bank is treated by grading, forming a limited state of the soil. According to the relevant information of the project, the vertical height H between the bottom of the slope and the top of the slope is 10.5m, the slope angle of the limited soil boundary 2 is β is 45°, and the internal friction angle between the soil is 17°, the experimentally measured friction angle between the soil and the outer wall is generally 2 / 3 of the internal friction angle between the soil, so the external friction angle δ is taken as 11°, regardle...

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Abstract

The invention discloses a method for calculating soil pressure of limited soil. The method comprises the following steps: determining profile parameters of a foundation pit profile and limited soil, setting the included angle between a fracture plane of the limited soil and the horizontal direction, performing force analysis on a fractured slide body, obtaining the weight of the fractured slide body, establishing an equation set by utilizing known parameters according to static balance conditions in the horizontal direction and the vertical direction, substituting an expression of soil pressure of the limited soil, deriving a shearing damage angle for soil pressure of the limited soil, enabling a derivative equation to be zero, obtaining a shearing damage angle value, reversely substituting the shearing damage angle value into the expression of soil pressure of limited soil, calculating a numerical value, namely soil pressure, generated on a surrounding structure, of every linear meter of limited soil. According to the method disclosed by the invention, values of beta angles are different, different limited soil boundary conditions are contained, stress characteristics of limited soil are sufficiently taken into consideration, and a fracture plane direction angle of limited soil is derived, so that active pressure, which conforms to reality, of limited soil is calculated, and therefore, the method has a very good popularization application value.

Description

technical field [0001] The invention relates to a method for calculating the earth pressure of a finite soil mass, which belongs to the technical field of civil engineering. Background technique [0002] In many foundation pit support projects and slope support projects, the earth pressure acting on the retaining wall is generally calculated by the classical earth pressure theory. The classical Rankine earth pressure theory and the Coulomb earth pressure theory are based on semi-infinite soil derived under the conditions. [0003] With the continuous development of urban engineering construction and the continuous development of engineering construction to underground space, there are existing underground building structures near many retaining works. When the distance between them is called finite soil. The lateral pressure generated by the limited soil on the foundation pit enclosure structure is called the limited soil earth pressure. The calculation of the limited soil...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/00
CPCE02D1/00
Inventor 方焘徐长节李九福杨锐锐杨园野
Owner 南昌市政公用集团有限公司
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