广西铁山港大桥桥头地段软基沉降观测与固结计算

Concretion calculation and observation of sedimentation of soft ground at Tieshan Harbor Bridge

根据广西铁山港大桥桥头地段软基沉降的实测结果和软基固结沉降理论 ,对该段 2种不同的软基处理方式———砂垫层 +土工格栅和砂桩 ,进行沉降和固结计算 .实测和计算的结果表明 :浅层处理 ,即砂垫层 +土工格栅 ,固结速率较小 ,工后沉降将经历一个较长时期 ,必须设置过渡路面 ;深层处理 ,即砂桩 ,固结速率较大 ,工后沉降低于允许值 ,路基竣工后即可进行正式路面施工 .

Two different kinds of soft ground treatments are introduced:sand cushion laid with geo_textile and sand pile.After settlement and concretion are calculated,the observation on the site and calculation show that the former treatment has a slow concretion rate,while the settlement after construction will last longer.The intermediate_type pavement must be set.The latter has a rapid concretion rate.The settlement value after construction is less than the acceptable value.After the basement of road is completed,the pavement can be constructed.