土工织物复合垫层法在新吹填软土地基加固中的应用与效果分析  

Application and analysis of the geotextile composite cushion in the ground improvement of the new dredger fill

作　　者：陈运涛[1,2] 王贵君[1] 孟凡强[3] 许岩 

机构地区：[1]河北工业大学,天津300401 [2]中交天津港湾工程研究院有限公司港口岩土工程技术交通行业重点实验室天津市港口岩土工程技术重点实验室,天津300222 [3]天津泰达海洋开发有限公司,天津300480

出　　处：《岩土工程学报》2016年第S1期169-172,共4页Chinese Journal of Geotechnical Engineering

基　　金：河北省应用基础研究计划重点基础研究项目(14965409D)

摘　　要：使用真空预压工艺加固软土地基时通常使用中粗砂作为水平排水通道。针对铺设土工织物复合垫层的新吹填软土地基加固试验区为研究背景,解决了水平排水系统、人造表层硬壳层和轻型插板设备等关键施工技术。通过加固过程中对孔隙水压力和地表沉降的监测,掌握了该工艺地基土体变形规律;加固前后取土和地基承载力检测数据表明加固后吹填土层含水率、孔隙比明显减小,地基承载力达到80 k Pa。试验数据证明采用土工织物复合垫层可有效替代传统中粗砂垫层,为后续大面积地基处理工程提供了参考。The vacuum preloading technology for reinforcing soft soil foundation often uses the coarse sand as the horizontal drainage channel. For laying geotextile composite cushion in the new dredger fill soft soil ground, key construction techniques such as horizontal drainage systems, artificial surface crust layer and light board equipment are achieved. By monitoring pore water pressure and surface subsidence, during improvement , the deformation law of foundation soil is grasped. The test data of bearing capacities of foundation and soil before and after improvement show that the water content, void ratio of reclaimed soil decrease obviously after improvement, and the bearing capacity of foundation is up to 80 kPa. The test data indicate that the geotextiles in composite cushion can effectively replace traditional coarse sand cushion. It may provide reference for soft ground improvement of subsequent large-area foundation.

关 键 词：土工织物 复合垫层 新吹填土 地基加固 工程实例 

分 类 号：TU472[建筑科学—结构工程] TU531.7[建筑科学—土工工程]