CAJ | 학술논문

深层水泥搅拌桩是处理深厚软土地基的有效方法。本文结合温州地区典型深厚软土，首先分析了采用水泥搅拌桩加固的4～8层建筑物地基的长期沉降观测结果，并用传统的方法进行了沉降计算，发现计算结果是实测结果的3倍左右。然后，试验研究了典型温州软土的结构性，得出主要压缩层的土体结构屈服应力比在1.7～2.5范围内，发现当下卧层的附加应力σz与有效自重应力σz0′之和小于土体结构屈服应力σsy时，建筑物沉降将得到有效控制。最后，在前人研究工作的基础上，提出考虑软土结构性的沉降计算方法，考虑土的结构性对下卧层沉降的影响，对12幢不同层数的建筑物进行了沉降计算，计算结果与实测结果相当一致。
심층수니교반장시처리심후연토지기적유효방법。본문결합온주지구전형심후연토，수선분석료채용수니교반장가고적4～8층건축물지기적장기침강관측결과，병용전통적방법진행료침강계산，발현계산결과시실측결과적3배좌우。연후，시험연구료전형온주연토적결구성，득출주요압축층적토체결구굴복응력비재1.7～2.5범위내，발현당하와층적부가응력σz여유효자중응력σz0′지화소우토체결구굴복응력σsy시，건축물침강장득도유효공제。최후，재전인연구공작적기출상，제출고필연토결구성적침강계산방법，고필토적결구성대하와층침강적영향，대12당불동층수적건축물진행료침강계산，계산결과여실측결과상당일치。
Deep mixing cement pile is a effective method to reinforce thick soft clay ground.In allusion to the typical thick soft clay in Wenzhou,this paper analyses the chronically monitored settlement of 4～8 floor building's composite foundation reinforced by deep mixing cement piles,and calculates the settlement with traditional method,and find that calculated settlement is 2 times greater than monitored value.The structure characteristics typical soft clay is studied through experimentation,and the yield stress ratio of soil structure is found in the range of 1.7～2.5,and the settlement of building will be effectively controlled when the sum of superimposed stress and effective self-weight stress is less than yield stress of soil structure in under-lying soft layer.Finally, referring to other researchers' studies and in view of the influence of soil structure characteristics to the settlement of under-lying soft layer, a new settlement calculation method has been put forward.With this method,settlement of 12 buildings are calculated and the calculated results are very close to the monitored results.