潮汐作用下爆破挤淤法路基内力变化分析  

Analysis on the Change of the Internal Force of the Subgrade Treated by Explosive Replacement Method under the Action of Tide

作　　者：肖广锋 杨善翩 秦伟 赵前辉 Xiao Guangfeng;Yang Shanpian;Qin Wei;Zhao Qianhui

机构地区：[1]浙江交工集团股份有限公司 [2]温州大学建筑工程学院 [3]浙江省软弱土地基与海涂围垦工程技术重点实验室

出　　处：《城市建筑》2023年第7期119-122,共4页Urbanism and Architecture

基　　金：浙江省公益技术应用研究项目(LGF22E080011);温州市基础性科研项目(S20210005);浙江省教育厅一般项目(Y202044146);浙江省教育厅专硕项目(Y202146757,Y202248922);温州大学硕士研究生创新基金项目(No.316202002070);温州大学大学生创新创业训练项目(JWXC2021194)。

摘　　要：爆破挤淤法作为一种经济高效的软土地基处理方法,被广泛应用于滨海潮间带淤泥质软土地基处理,然而位于潮间带区域的路基常年经受潮汐作用,涨落潮的变化可能导致土体内部结构和力学性质发生变化,从而影响路基运营的安全性和稳定性。为了探明潮汐作用下潮间带爆破挤淤法处理路基内力演化的规律,研究依托福建宁德某潮间带爆破挤淤法地基处理项目,利用光纤光栅传感器对其进行土压力和渗压力监测。通过对比分析监测数据,可知传感器所采集到的数据能够揭示土压力和渗压力的变化规律,表明路基土压力和渗压力会随着潮水位涨落发生变化,并且二者具有相似的变化曲线,涨落潮对爆破挤淤法处理路基稳定性存在潜在的影响。Explosive replacement method,as an economic and efficient soft soil foundation treatment method,is widely used in the soft soil foundation treatment in marina tidal zone.However,the subgrade located in the intertidal zone is suffered from the tidal action,and the changes of rising and falling tides may lead to changes in the internal structure and mechanical properties of the soil,thus affecting the safety and stability of the subgrade operation.In order to explore the evolution law of internal force of subgrade treated by explosive replacement method under tidal action,this paper relies on a foundation project treated by intertidal explosive replacement method in Ningde,Fujian Province,and uses fiber Bragg grating sensor to monitor the earth pressure and seepage pressure.By comparing and analyzing the monitoring data,it can be seen that the data collected by the sensor can reveal the change law of earth pressure and seepage pressure,indicating that the subgrade earth pressure and seepage pressure will change with the ebb and flow of the tide level,and both of them have similar change curves.The ebb and flow tide has a potential influence on the stability of the subgrade treated by explosive replacement method.

关 键 词：爆破挤淤法 光纤光栅传感器 土压力 渗压力 潮汐作用 

分 类 号：TU431[建筑科学—岩土工程]