辽东半岛东部庄河海域海岸带工程地质特征及开发适宜性分析

辽东半岛东部庄河海域分布有大量的人类工程活动设施，研究其工程地质特征和开发适宜性有助于提升海洋工程开发的安全和效率。利用海洋高精度地球物理调查、海底沉积物表层取样和历史工程地质数据收集等方法获取的各类调查数据，对庄河海域海岸带工程地质特征进行了系统分析。调查资料分析结果表明，研究区水深在11.5～15.6 m、坡度较小、海底地形较为平坦、存在4个连续声学反射界面；海底存在软弱土层、埋藏古洼地和埋藏古河道等不良地质因素。表层沉积物液塑限性质测试结果表明，研究区海底沉积物较为稳定，不需考虑软土的震陷问题。综合分析研究区各类地质影响因素，认为研究区各类环境指标较为稳定，适宜开展海洋工程开发活动，但是具体施工时需要重点考虑探测到的各类不良地质因素。

Analysis of Engineering Geological Characteristics and Exploitation Suitability of Coastal Zone in the Zhuanghe Sea Area in the Eastern Liaodong Peninsula

A large number of human engineering activity facilities are distributed in the Zhuanghe sea area in the eastern Liaodong Peninsula. Therefore, studies on the engineering geological characteristics and exploitation suitability in the Zhuanghe sea area can be helpful for improving the safety and efficiency of offshore engineering exploitations. Based on the data obtained by high-precision marine geophysical surveys, surface sediment sampling and collection of historical engineering geological data, the engineering geological characteristics of the coastal zone in the Zhuanghe sea area are analyzed systematically. The results indicate that at the water depth ranging from 11.5 m to 15.6 m in the study area the seafloor has a small slope and a relatively flat terrain, and under the seafloor there are four continuous acoustic reflection interfaces and some adverse geological factors such as soft soil layers, buried ancient depressions and river channels. The results of the liquid-plastic limit property tests of the surface sediment indicate that the seafloor sediment in the study area is relatively stable and the sinking problem of the soft soils can be ignored. Through the comprehensive analysis of all geological impact factors in the study area, it can be believed that the various environmental indicators in the study area are relatively stable and suitable for carrying out the marine engineering exploitation activities. However, all the detected adverse geological factors should be considered and focused on in the specific construction process.