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Method for reducing soil pressure applied by two-layered filling roadbed to retaining wall

An earth pressure and retaining wall technology, applied in the field of geotechnical engineering, can solve problems such as large errors and neglect of wall-soil interaction, and achieve the effect of design safety and avoiding large errors

Inactive Publication Date: 2016-06-15
SOUTHEAST UNIV
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Problems solved by technology

For the case where the fill behind the wall is multi-layered, two methods are commonly used in actual engineering: the first method is the equivalent method, which has a clear concept but has large errors; the second method is the layered calculation method, which is The method has assumptions such as ignoring the wall-soil interaction, and that the sliding surfaces of each layer are independent of each other.

Method used

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  • Method for reducing soil pressure applied by two-layered filling roadbed to retaining wall
  • Method for reducing soil pressure applied by two-layered filling roadbed to retaining wall
  • Method for reducing soil pressure applied by two-layered filling roadbed to retaining wall

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0020] The method of the present invention is illustrated with an embodiment. A certain subgrade retaining wall is 5m high, and the subgrade filling parameters behind the retaining wall are as shown in Table 1. The specific implementation steps are as follows.

[0021] Table 1 Fill parameters

[0022]

[0023] Assuming the scope of the sliding soil wedge of the two layers of subgrade filling behind the retaining wall, determine the filling parameters: the filling parameters that need to be determined are shown in Table 1, and the filling parameters in Table 1 γ 1 , γ 2 , δ 1 ,δ 2 It can be measured by traditional test methods and is a known parameter. Such as figure 1 As shown, define the angle between the upper filling soil sliding surface and the vertical direction as θ 1 , the angle between the sliding surface of the lower filling soil and the ...

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Abstract

The invention discloses a method for reducing soil pressure applied by a two-layered filling roadbed to a retaining wall. The method can be used for reducing the soil pressure applied by the two-layered filling roadbed to the retaining wall in the road construction process. In the invention, calculation of the soil pressure applied by the two-layered filling roadbed to the retaining wall is not based on Coulomb's earth pressure theory, but the flow rule related to force analysis and filling motion on horizontal soil layer unit bodies behind the retaining wall. The method, disclosed by the invention, not only can obtain the strength and distribution of the soil pressure applied by the two-layered filling roadbed to the retaining wall, but also can analyze the influence of different filling sequences on the soil pressure, thus selecting a lower soil pressure scheme. The method is very important in practice for scientifically and reasonably guiding design of the retaining wall in the road construction process.

Description

technical field [0001] The invention relates to a method for reducing the earth pressure acting on a retaining wall by a two-layer filling roadbed, which belongs to the technical field of geotechnical engineering and is suitable for calculating the earth pressure of a two-layer filling roadbed on a retaining wall during road construction. Background technique [0002] Calculation of the earth pressure of filling soil on retaining wall has always been a matter of great concern to the engineering and academic circles. At present, Rankine's earth pressure theory and Coulomb's earth pressure theory based on the limit equilibrium theory are still the most widely used methods in practical engineering. For Rankine's earth pressure theory, assuming that the back of the retaining wall is smooth, without considering the friction between the fill and the retaining wall, a calculation formula for the horizontal earth pressure of the fill on the retaining wall is established, and the ear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/06E02D29/02E01C3/00
CPCE01C3/00E02D29/02G06F30/13G06Q50/06
Inventor 朱志铎张孝彬唐震
Owner SOUTHEAST UNIV
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