A Design Method for Embedded Foundation of Bridges with High and Steep Slopes

Abstract

A design method for the embedded foundation of bridges with high and steep slopes provides a more scientific design basis for the design of the embedded foundation and greatly improves the engineering economy of the embedded foundation. It includes the following steps: ① Preliminary drafting of the design parameters of the embedded foundation; ② Calculation of the lateral pressure P at the most unfavorable shear height below the anchorage surface according to the anchorage point stress 1 ; ③ Calculate the shear capacity T of the rock mass in the most unfavorable height range below the anchorage surface; ④ Determine whether the shear capacity T of the rock mass at the most unfavorable height below the anchorage surface is greater than the lateral pressure P at the most unfavorable height below the anchorage surface 1 ; ⑤ Calculate the vertical allowable bearing capacity [P] of the embedded foundation according to the degree H of the embedded foundation determined in step ④; ⑥ Check whether the vertical allowable bearing capacity [P] of the foundation meets the design requirements according to the formula: [P] ≥P+W; if the requirements of the above formula are not met, further deepen the length H of the embedded foundation, and repeat steps ④ and ⑤ until the design requirements are met.

Description

technical field [0001] The invention relates to civil engineering, in particular to a design method for embedding foundations of bridges with high and steep slopes. Background technique [0002] The embedded foundation is an independent foundation embedded in the rock foundation. It has the characteristics of convenient construction, less excavation volume and less impact on the environment under good geological conditions. refer to figure 1 with figure 2 , Compared with pile foundation and open cut foundation, the excavation area is much smaller than the cap platform or open cut foundation area, which has less damage to the mountain and is well coordinated with the natural environment. Especially on high and steep slopes with relatively good rocks, it is not suitable to use open-cut foundations. However, if the pile foundation cap is to be buried below the ground, it is necessary to excavate the soil on the side of the mountain, causing large-scale mountain damage. [0...

AI Technical Summary

Problems solved by technology

"If according to the above regulations, for a rock-socketed foundation with a diameter of about 15m, the distance between the anchor point and the edge of the slope should be more than 30m, which is too conservative and not scientific enough, resulting in poor economic efficiency of the project. The stress of the pile foundation matches the

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