浅层加固技术中抽真空作用强度对加固效果的影响

Effect of vacuum intensity to consolidation performance in surface-layer improvement technique

在浅层加固技术应用过程中,目前仍参照真空预压技术规范进行布泵。考虑到经济因素,如何控制开泵比例并满足设计要求将对该技术的推广应用具有重大的实际意义。以温州丁山垦区软基处理工程为依托,结合现场监测及检测结果,对两个不同布泵密度及开泵比例的试验区进行比较分析。结果表明,布泵密度可适当减小,而开泵比例需根据固结度在相应的时间段内进行调整,可达到较满意的加固效果。

At present,the jet pumps are arranged according to the construction specification of vacuum preloading method in the application of surface-layer improvement technique.It is important to spread the application of this technology if the vacuum rate can be controlled to meet the designed requirements and the cost can be decreased correspondingly.Based on the treatment engineering of soft foundation in Dingshan Region,Wenzhou,comparison and analysis were carried out on the arranged density of jet pumps and the ratio of working pumps depending on the monitoring and inspected results.It showed that the arranged density of jet pumps can be reduced and the ratio of working pumps should be adjusted in the light of the consolidated degree during the corresponding course,which can obtain satisfied performance.