堆载挤淤沉降断面的分段计算方法

以某拦污坝工程为背景,建立了堆载挤淤沉降断面的分段计算方法.根据初期荷载不同挤淤深度时淤泥层的稳定性,搜索得到挤淤瞬时沉降断面,在此基础上,基于比奥固结理论和修正的剑桥模型,建立数值分析模型,得到最终的堆载挤淤沉降断面.计算结果表明,最终的堆载挤淤沉降断面与上覆荷载形式正相关,挤淤沉降断面呈倒梯形分布.最后,采用高密度电法对工程实际堆载挤淤沉降断面进行检测,验证了上述计算方法的正确性.

Stepwise Calculation Method of Dump Silt-Replacement Settlement Section

A stepwise calculation method for the silt-replacement settlement section is established in the background of a barrier dam. The silt-replacement instantaneous settlement is searched according to the stability of silt for different silt-replacement depth of the earlier dump. Then the silt consolidation settlement numerical analysis model under the compaction of the earlier and later dump is established and the final dump silt settlement section is got based on the Biot consolidation theory and the modified Cambridge model. The calculation results show that the final dump silt-replacement settlement section is positively correlated to the dump， the dump silt-replacement section appears to be an inverted trapezoidal. Finally， the corresponding calculation method is verified by detecting the real dump silt-replacement settlement section in the engineering by the high density resistivity method.