深厚软基上土石坝坝体溢洪道泄槽末端反弧段的稳定分析

Stability Analysis of the Anti-arc at the End of Chute of Crest Spillway of Earth-rock Dam on the Deep-soft Basis

在土石坝的筑坝技术不断提高和适宜建造溢洪道的地形及地质条件日益减少的情况下,工程上已开始把溢洪道布置在土石坝坝体上,因此,研究建在深厚软基上溢洪道反弧段的稳定就更具有实际意义了。利用钻孔灌注桩来处理溢洪道反弧段下的深厚软弱地基,根据其反弧段和钻孔灌注桩的受力情况,通过对深厚软基上土石坝坝体溢洪道泄槽末端反弧段进行稳定分析,得出了基桩的承载力、长度与其所受各力之间的关系和稳定安全系数表达式,这对今后的工程设计具有参考意义。

In the earth-rock dam and appropriate technology to improve the construction of spillway of the terrain and geological conditions for a gradual decrease in the engineering, the spillway is arranged in the earth-rock dam, in turn, built on solid research on soft ground spillway. Anti-arc stability is of great practical significance. In this paper, bored piles are used to deal with the spillway section of the anti-arc deep soft ground, in accordance with its anti-arc, and bored piles of force, through the deep soft-top earth-rock darn on the spillway chute at the end of the anti-arc for stability analysis, and the base of the bearing capacity of piles and the length of its subject the relationship between the power factor of safety and stability of expression are reached. It serves as a reference for the future engineering design.