There should be a single earthwork construction plan in the earthwork excavation construction organization design, and the construction preparation, excavation method, slope setting, drainage and slope support should be designed according to the requirements of relevant specifications, and the slope support should have a design calculation.

The excavation of foundation pit should be carried out in strict accordance with the requirements. If there is any problem with the slope stability, the slope should be reinforced in time. In order to prevent the earth wall from collapsing and ensure the construction safety, when the excavation exceeds a certain depth or the fill exceeds a certain height, sufficient slope should be released at the edge, and the earthwork slope is generally expressed by slope and slope coefficient.

Extended data

1, in buildings, the slope should start from the upper surface of the cushion;

2. In the pipeline earthwork quota, the calculation rules of earthwork slope coefficient of pipe trench are as follows:

(1) The excavation depth is within 1m, regardless of the slope;

(2) The excavation depth is 1.0 1m ~ 2.00m, and the slope is graded according to 1: 0.5;

(3) The excavation depth is 2.0 1m~4.00m ~ 4.00m, and the slope is1:0.7;

(4) The excavation depth is 4.0 1m~5.00m ~ 5.00m, and the slope is laid according to1:1;

(5) When the excavation depth is more than 5m, it should be placed on the slope according to the slope calculated by the soil stability theory.

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