CAJ | 학술논문

隧道施工必然会使地表产生变形,从而对地表建筑物产生不利影响.针对厦门机场路梧村山隧道施工实际,通过现场监测和有限元模拟计算,分析隧道施工对地表砌体结构建筑物的影响.研究表明:掌子面CRD1～4开挖期间对建筑物的沉降影响最大;施工紧凑时隧道开挖对建筑物的影响小,反之影响大;施工过程中应严格控制注浆压力和注浆量,注浆速度宜慢不宜快,以保证建筑物整体均匀抬升;不均匀沉降作用下建筑物底层反应最明显,且抵抗下凹变形的能力比抵抗上凸变形的强;裂缝主要分布于底层纵墙的门窗洞口处,且沿纵墙沉降较小侧向较大侧斜向上升,裂缝开展随不均匀沉降的增大而加剧,反之则减缓.
수도시공필연회사지표산생변형,종이대지표건축물산생불리영향.침대하문궤장로오촌산수도시공실제,통과현장감측화유한원모의계산,분석수도시공대지표체체결구건축물적영향.연구표명:장자면CRD1～4개알기간대건축물적침강영향최대;시공긴주시수도개알대건축물적영향소,반지영향대;시공과정중응엄격공제주장압력화주장량,주장속도의만불의쾌,이보증건축물정체균균태승;불균균침강작용하건축물저층반응최명현,차저항하요변형적능력비저항상철변형적강;렬봉주요분포우저층종장적문창동구처,차연종장침강교소측향교대측사향상승,렬봉개전수불균균침강적증대이가극,반지칙감완.
Tunnel construction will cause surface deformation inevitably,which has a negative effect on the surface buildings. According to the construction practice of Wucunshan Tunnel in Xiamen Airport Road,the effect of tunnel construction on the surface masonry buildings is analyzed through field monitoring and finite element simulation. The results show that the excavations of tunnel face CRD1-4 have the most important influence on building settlement. Tunnel excavation has little influence on the building under compact construction,and vice versa. The grouting pressure and grouting amount must be strictly controlled in the construction process. It is better to grouting slowly rather than fast,which can ensure the uniform uplift of the whole building. The most obvious response of building under uneven settlement occurs at the bottom story;and its ability to resist down concave deformation is stronger than that to upper convex deformation. The cracks are mainly distributed around the door and window openings in the longitudinal wall at first floor,developing slantwise along the side of smaller settlement to the side of larger settlement. Moreover,the development of the cracks aggravates with the increase of the differential settlement,and vice versa.