Foundation pit two-dimensional steady-state seepage field calculation method and system under suspension type retaining wall support

Abstract

The invention discloses a method and a system for calculating a two-dimensional steady-state seepage field of a foundation pit under the support of a suspended retaining wall, a half section of the foundation pit is calculated and analyzed according to symmetry, and the seepage field around the foundation pit is divided into four regular areas by taking the retaining wall direction of the foundation pit as a z axis and the horizontal line direction of the wall bottom as an x axis; establishing a two-dimensional geometric model of the foundation pit in the isotropic single-layer soil layer under the support of the suspension type impermeable retaining wall; assuming that the soil texture of the upper soil layer of the impervious layer is uniform and the seepage of the soil body is isotropic and accords with the Darcy law, solving a simplified expression of a water head of each region by utilizing a separation variable method in combination with boundary conditions of each region of the seepage field of the foundation pit; and constructing a non-homogeneous equation set by utilizing continuous conditions among the regions, solving to obtain a constant term, and substituting the constant term into a simplified expression of a regional water head, so as to obtain a simplified solution of water heads inside and outside the foundation pit. According to the method, the water pressure borne by the retaining wall can be accurately calculated, and the method has remarkable engineering significance for guaranteeing safe construction of a foundation pit.

Description

technical field [0001] The invention relates to the technical field of underground civil engineering, and particularly discloses a method and system for calculating a two-dimensional steady state seepage field of a foundation pit in an isotropic soil layer supported by a suspended impervious retaining wall. Background technique [0002] With the rapid development of my country's national economy and the ever-improving level of science and technology, urban land has become increasingly scarce, and the land on the ground is no longer enough to meet people's needs. Many high-rise and even super-high-rise buildings have been built in various places. The development and utilization of underground space has become the development trend of urban construction. The construction of large buildings such as subways, underground shopping malls, and underground garages has become the focus of construction in many cities in recent years. trend development. [0003] In the construction of hi...

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Problems solved by technology

[0006] The present invention provides a method and system for calculating the two-dimensional steady-state seepage field of a foundation pit under the support of a suspended retaining wall. Technical Problems of Calculation Method of Two-dimensional Steady Seepage Field of Foundation Pit after Equal Factors

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