Abstract

Based on the soil behavior type (SBT) and its parameters (I_c) obtained by cone penetration tests (CPTs) in the Yellow River Delta, the standardized shear wave velocity (V_s1), permeability coefficient (k), and fine-grained soil content (FC) were calculated. The fine-grained soil content offshore is higher than that near the coast. The shear wave velocity is primarily distributed in the range of 50 m/s–400 m/s; however, it is lower than that in the nearshore position. The measured regional permeability coefficients are all less than 2 × 10⁻⁵ m/s; however, a small area of the nearshore has an increased value, for which the maximum value is approximately 6 × 10⁻⁵ m/s. According to the known marine disaster geological distribution map, there are significant differences in the composition of the shear wave velocity and fine-grained soil content between the disturbed delta front and the flat delta front: the fine-grained soil content in the disturbed delta front is less than that in the smooth delta front, and the shear wave velocity in the disturbed delta front is higher than that in the smooth delta front. Moreover, the measured parameters in the disturbed delta area near the shore clearly vary, and hard sand is distributed locally.

摘要

基于黄河三角洲锥贯试验（CPTs）获得的土壤行为类型（SBT）及其参数（I _c），标准化剪切波速度（V _s1）、渗透系数（k）和细粒计算土壤含量（FC）。近海细粒土含量高于近岸。横波速度主要分布在50 m/s～400 m/s范围内；但是，它低于近岸位置。实测区域渗透系数均小于2×10 ^-5 m/s；然而，近岸的一小部分区域具有增加的值，其最大值约为 6 × 10 ^-5多发性硬化症。根据已知的海洋灾害地质分布图，扰动三角洲锋面与平坦三角洲锋面的横波速度和细粒土含量组成存在显着差异：扰动三角洲锋面的细粒土含量小于平滑三角洲前缘，受扰三角洲前缘剪切波速度高于平滑三角洲前缘。此外，近岸扰动三角洲地区实测参数变化明显，硬砂局部分布。