摘要
针对海上沉桩施工中容易出现的停锤后打桩困难甚至拒锤现象,提出了高压水射流辅助沉桩的技术设想,并设计了海洋石油桩基平台射流辅助沉桩模型实验装置。通过该实验装置测试了6种不同形状喷嘴产生的射流对土塞表面的作用力,并对土体内应力分布状态进行数值模拟实验,得到了6种喷嘴射流作用下土体内的最大应力和最小应力,验证了模型实验结果。海洋石油桩基平台桩基建设过程中,采用高压水射流辅助沉桩提高桩基建设效率是完全可行的。等变速型喷嘴有限喷距最长,作用在土塞表面中心处的压力也最大。研究结果为海洋石油桩基平台射流辅助沉桩原理样机试制提供了重要依据。
A high-pressure water jet assisting pile sinking technology concept was proposed to over- come the difficulty in restarting the pile-sinking after intermittent piling. An experiment device for simulating the offshore water jet assisting pile- sinking was designed and used to test the different stress in soil plug under the jets produced by six kinds of nozzles. Numerical simulation was used to get the stress distribution the maximum and minimum stres under the action of jets produced nozzles, which verified the exper e soil body and ses in soil plug by six kinds of iment result of the model. High pressure waterje sinking to improve the efficiency is sible during the construction of off t asmstlng completely shore plat{ fea- orm pile. Among the six nozzles, the jet distance of iso variable nozzle was longest, with highest pressure at the center of study results provide the trial-producing the princi mstmg platfor m. soil plug surface. The important evidence for ple prototype of jet as- sinking of offshore pile foundation
出处
《中国海上油气》
CAS
CSCD
北大核心
2014年第6期98-101,共4页
China Offshore Oil and Gas
基金
国家重点基础研究发展计划(973计划)项目(编号:2010CB226703)
山东省自然科学基金项目(编号:ZR2011EEQ012)
高等学校博士学科点专项科研基金项目(编号:20110133120013)
中央高校基本科研业务费专项资金资助项目(编号:14CX02164A)
中国石油大学科研启动基金资助项目(编号:Y1302056)部分研究成果
关键词
海洋石油桩基平台
高压水射流
辅助沉桩
数值模拟实验
模型实验
offshore pile foundation platform
highpressure water jet
assisting pile-sinking
numeri-cal simulation experiment
model experiment
