Soil excavation method for increasing quantity of open excavated soil in reverse construction of foundation pit earthwork
A technology of earthworks and earthworks, applied in infrastructure engineering, excavation, construction, etc., can solve the problems of slow excavation progress, high excavation cost, and slow excavation, so as to save construction period, ensure the safety of foundation pit, save construction period and The effect of excavation costs
Inactive Publication Date: 2015-07-08
ZHONGTIAN CONSTR GROUP
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Problems solved by technology
Using this method, the excavation volume of open excavation is relatively small, resulting in a slow overall excavation progress and high excavation cost (the cost of underground excavation is about twice the cost of open excavation, and the excavation is slow)
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[0030] The Outpatient Medical Technology Building Project of Union Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, is located on the bustling Jiefang Avenue in Hankou. The excavation is subject to city control, and a subway station near the south of the project is about to start construction, increasing the pressure on earthwork travel for this project Therefore, it is more advantageous for us to rush to start construction before the subway station. At the same time, the owner requires early business, and the construction period is very tight. Therefore, the foundation pit earthwork excavation method of the present invention is adopted. The specific steps are:
[0031] The first step is to analyze the geological and hydrological conditions in the foundation pit, determine the maximum depth of open excavation in the middle of the foundation pit, and the width and slope of the passive soil around the foundation pit, and adopt th...
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The invention discloses a soil excavation method for increasing quantity of open excavated soil in reverse construction of foundation pit earthwork. The method comprises the steps of performing open excavation until forming a position on a B2 plate below a B1 plate by the basin type open excavation method, and bedding and pouring the excavation interface; constructing a concrete structure of the middle part of the B1 plate; constructing the concrete structure of a B0 plate; performing passive underground soil excavation below the B1 plate at the side of a foundation pit, and then constructing the concrete structure of the B1 plate at the side of the foundation pit. With the adoption of the method, the quantity of the open excavated soil is increased more than two times; the construction period and the soil excavation cost can be greatly saved while the foundation pit safety is ensured.
Description
technical field [0001] The invention belongs to the technical field of building engineering construction, and in particular relates to the excavation engineering of the first layer of earthwork of a foundation pit constructed by the upside-down method. Background technique [0002] For the foundation pit project constructed by the reverse method, the conventional practice is that the depth of the first layer is H=h 1 + h 2 + h 3 + h 4 +d 1 +d 2 +d 3 = 2.1m or so, basin-type open excavation is adopted, and basin-type underground excavation is adopted for the lower soil (h 1 is the length of the vertical pole of the formwork frame, h 2 The length of the exposed screw rod for the upper end of the vertical rod of the formwork frame, h 3 is the main flute height of the formwork, h 4 is the back flute height of the formwork, d 1 is the thickness of the foundation cushion of the formwork frame, d 2 is the thickness of the backing plate at the bottom of the vertical pole ...
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IPC IPC(8): E02D17/02
Inventor 程海寅方忠民杨利剑
Owner ZHONGTIAN CONSTR GROUP