人民长江
人民長江
인민장강
YANGTZE RIVER
2015年
11期
65-67,79
,共4页
超软淤泥地基%真空预压%二次预压%现场试验
超軟淤泥地基%真空預壓%二次預壓%現場試驗
초연어니지기%진공예압%이차예압%현장시험
extremely soft silt%vacuum preloading%twice preloading%in-situ test
针对吹填淤泥地基承载力几乎为零的特点，采用二次(一次无砂垫层，二次有砂垫层)真空预压法对大面积吹填淤泥进行处理。通过现场试验，分别对两次真空预压中的真空度、地基沉降等进行了观测。结果表明，对超软淤泥地基采用无砂垫层进行一次预压处理，能有效解决因地基承载力过低而无法施工的问题；进而采用有砂垫层的二次预压提高了真空压力的传递效果，可以进一步提高地基承载力。
針對吹填淤泥地基承載力幾乎為零的特點，採用二次(一次無砂墊層，二次有砂墊層)真空預壓法對大麵積吹填淤泥進行處理。通過現場試驗，分彆對兩次真空預壓中的真空度、地基沉降等進行瞭觀測。結果錶明，對超軟淤泥地基採用無砂墊層進行一次預壓處理，能有效解決因地基承載力過低而無法施工的問題；進而採用有砂墊層的二次預壓提高瞭真空壓力的傳遞效果，可以進一步提高地基承載力。
침대취전어니지기승재력궤호위령적특점，채용이차(일차무사점층，이차유사점층)진공예압법대대면적취전어니진행처리。통과현장시험，분별대량차진공예압중적진공도、지기침강등진행료관측。결과표명，대초연어니지기채용무사점층진행일차예압처리，능유효해결인지기승재력과저이무법시공적문제；진이채용유사점층적이차예압제고료진공압력적전체효과，가이진일보제고지기승재력。
Aiming at the extremely low bearing capacity of hydraulic fill foundation, the twice vacuum pre-loading reinforcing method, firstly preloading cushion layer without sand and then preloading cushion layer containing sand, was adopted to strength-en the silt foundation. By in-situ test, the vacuum degree and foundation settlement in the two preloading process were meas-ured. The results showed that the first preloading could effectively solve the problem of unable-to -construction caused by the extremely low foundation bearing capacity;the second preloading could improve transmission effect of vacuum pressure and fur-ther upgrade the foundation bearing capacity.
