CAJ | 학술논문

结合大量现场实测数据，系统分析了基坑开挖过程中维护结构变形、地表沉降以及周围建筑物的变形规律，监测结果显示：维护墙体变形整体呈“纺锤”状，并具有明显的时空效应，随着开挖深度的不断加深，地下连续墙水平位移的最大值也不断向下移动；地表沉降曲线表现出明显的“沉降盆”，在距离基坑边缘一定距离处达到最大值，并随着距基坑距离的不断增大，地表沉降逐渐减小，且深层土体的开挖对地表沉降的影响尤为明显；加强邻近历史建筑物侧的基坑维护和防水措施以及对历史建筑物地基的加固处理有效地控制了历史建筑物沉降。结论对在密集建筑群中软土地基上基坑设计和开挖具有一定的实用价值和借鉴意义。
결합대량현장실측수거，계통분석료기갱개알과정중유호결구변형、지표침강이급주위건축물적변형규률，감측결과현시：유호장체변형정체정“방추”상，병구유명현적시공효응，수착개알심도적불단가심，지하련속장수평위이적최대치야불단향하이동；지표침강곡선표현출명현적“침강분”，재거리기갱변연일정거리처체도최대치，병수착거기갱거리적불단증대，지표침강축점감소，차심층토체적개알대지표침강적영향우위명현；가강린근역사건축물측적기갱유호화방수조시이급대역사건축물지기적가고처리유효지공제료역사건축물침강。결론대재밀집건축군중연토지기상기갱설계화개알구유일정적실용개치화차감의의。
Based on a large amount of experimental data,the rules was analyzed about the structure deformation,ground settlement and surrounding building deformation during excavation process.The monitoring results show that the deformation of the maintenance wall presents“spindles”shape,and has a space-time effect.With the increase of excavation depth,the maximum lateral displacement of diaphragm wall is constantly moving downward;surface subsidence curves show a “settling basin”,which means the subsidence reaches a maximum at a certain distance away from foundation pit edges,and the surface settlement gradually decreases as the distance increases, and the impact on surface subsidence in excavating deep soil is obvious;the settlement of the historical buildings can be controlled by reinforcing the lateral foundation enclosure and waterproof measures before excavating,as well as by the reinforcement of the historical building foundation. The conclusions provide some practical value and valuable reference for designing and excavating the soft soil foundation under crowded buildings.