深厚软土区过渡段软基处理方式现场试验研究

Field Test on Treatment of Soft Foundation in Transition Section of Deep Soft Soil Area

以浙江省台州湾大桥及接线工程TS13标段为依托,研究了水泥搅拌桩处理、管桩处理等软基处理方式下桥头过渡段到普通路段的过渡效果。现场试验研究管桩变桩长、管桩和水泥搅拌桩相结合的软基处理方案,研究发现:通过控制管桩的桩长变化,可以实现桥头段到桥头过渡段的平滑过渡;在管桩和水泥搅拌桩的软基处理方式处,设置合理的管桩和水泥搅拌桩的桩长与间距,或者增加过渡段的长度,可使管桩处理段和水泥搅拌桩处理段平滑过渡。

Based on the TS13 section of the Taizhou Bay Bridge and its connection project in Zhejiang Province,the effect of the transition from the abutment to the common section was studied.Field tests were conducted to study the soft foundation treatment scheme with variable length of pipe pile and combination of pipe pile and cement mixing pile.It is found that the smooth transition from abutment to the common section can be realized by controlling the change of pile length.Setting reasonable length and space between pipe pile and cement mixing pile,or increasing the length of transition section,can offer a smooth transition between the treatment section of pipe piles and cement mixing piles in the soft foundation treatment of pipe pile and cement mixing pile.