摘要
采用弹性抗力有限元方法讨论多支撑锚桩的深坑支护设计问题。该方法与传统的静力平衡法相比有其优越性，能够计算出不同开挖阶段的桩顶位移，桩身弯距随深度的变化，模拟开挖过程，最大限度地协调支护结构与土体的变形关系，并能确定出最小的桩身弯距设计值及各层锚杆的锚固力。并以实例运用该方法对青岛某基坑工程的支护进行了设计。
This paper makes a comprehensive study on the high resolution marine acoustic records obtained on the Yellow River Delta. According to the deformation degree and geomorphic feature of the destroyed submarine soil, the mass movement on the submarine slope of the study area is classified as follows: slight shallow soil deformation, collapse depression, and slide and sediment gravity flow. Slight shallow soil deformation in the slick upslope of the study area is the result of vertical movement after marine soil was liquefied. Slide is composed of an arcuate depression zone, a narrow chute and a negative landfome sediment accumulation zone. Some extension fractures could be found on the back fringe of the escarpment and the outrunner block appears on the down slope of shallow slide of the abandoned river mouth. Sediment gravity flow cutting and filling the local part of the study area is the last stage of the deformation of the destroyed marine soil and transports the longest distance.
