水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2014年
3期
80-84
,共5页
预压荷载%侧向变形%水平位移%实测资料
預壓荷載%側嚮變形%水平位移%實測資料
예압하재%측향변형%수평위이%실측자료
preloading load%lateral deformation%horizontal displacement%measured data
软土地基侧向变形会引起上部土体的水平位移，产生裂缝，引发道路开裂、路基失稳等工程问题。为了研究不同预压荷载作用下软土路基的侧向变形规律，分析了真空预压、堆载预压以及真空-堆载联合预压法加固软基时土体的应力、应变和侧向受力的不同。结合软基预压加固的实测资料，讨论了不同预压方式下土体的水平位移。得到了如下结论：在不同预压荷载作用下，土体的应力不同，应变路径不同，侧向所受应力也不同；预压加固断面实测的水平位移曲线表现出了与应力计算分析相同的现象；由于路基处理的隐蔽性，预压方法加固软土路基时，需建立科学的监测方法，进行信息化施工；不同的预压方法加固软基时，真空预压处理深厚软基的效果优于堆载预压。
軟土地基側嚮變形會引起上部土體的水平位移，產生裂縫，引髮道路開裂、路基失穩等工程問題。為瞭研究不同預壓荷載作用下軟土路基的側嚮變形規律，分析瞭真空預壓、堆載預壓以及真空-堆載聯閤預壓法加固軟基時土體的應力、應變和側嚮受力的不同。結閤軟基預壓加固的實測資料，討論瞭不同預壓方式下土體的水平位移。得到瞭如下結論：在不同預壓荷載作用下，土體的應力不同，應變路徑不同，側嚮所受應力也不同；預壓加固斷麵實測的水平位移麯線錶現齣瞭與應力計算分析相同的現象；由于路基處理的隱蔽性，預壓方法加固軟土路基時，需建立科學的鑑測方法，進行信息化施工；不同的預壓方法加固軟基時，真空預壓處理深厚軟基的效果優于堆載預壓。
연토지기측향변형회인기상부토체적수평위이，산생렬봉，인발도로개렬、로기실은등공정문제。위료연구불동예압하재작용하연토로기적측향변형규률，분석료진공예압、퇴재예압이급진공-퇴재연합예압법가고연기시토체적응력、응변화측향수력적불동。결합연기예압가고적실측자료，토론료불동예압방식하토체적수평위이。득도료여하결론：재불동예압하재작용하，토체적응력불동，응변로경불동，측향소수응력야불동；예압가고단면실측적수평위이곡선표현출료여응력계산분석상동적현상；유우로기처리적은폐성，예압방법가고연토로기시，수건립과학적감측방법，진행신식화시공；불동적예압방법가고연기시，진공예압처리심후연기적효과우우퇴재예압。
The lateral deformation of soft soil will cause the horizontal displacement of the upper part of the soil ,then cracks ,which will cause road cracking ,subgrade instability and other engineering problems .In order to study the lateral deformation law of the soft soil subgrade under different preloading load ,the stress ,strain and lateral force of the soft soil foundation under the vacuum preloading ,surcharge preloading and combined vacuum-surcharge preloading were ana-lyzed .Based on the observed data of the soft soil subgrade by preloading ,the horizontal displacement of the soft soil un-der different preloading was discussed .The conclusions are as follows :The stress and the strain as well as the lateral stress of the soft soil is different under the different preloading load ;The horizontal displacement curves observed from preloading section show the same characteristics with the stress calculation analysis ;Due to the roadbed of concealment , when using the preloading method for the consolidation of soft soil subgrade ,the scientific monitoring techniques and in-formation construction are required ;When using different preloading method for the consolidation of soft foundation ,the treatment effect for deep soft foundation by vacuum preloading is better than that by surcharge preloading .
