中国煤炭地质
中國煤炭地質
중국매탄지질
Coal Geology of China
2015年
11期
37-42,61
,共7页
佛山融利大厦%软土地区%大型复杂基坑%平面双环组合支撑%环形支撑
彿山融利大廈%軟土地區%大型複雜基坑%平麵雙環組閤支撐%環形支撐
불산융리대하%연토지구%대형복잡기갱%평면쌍배조합지탱%배형지탱
Rongli Building in Foshan%soft soil area%large complex foundation pit%planar double annular girders assembled support%annular support
环形支撑体系以环撑受压为主要特点，是内支撑体系中能充分发挥混凝土材料性能的合理支撑体系。环形支撑能优化支撑和竖向立柱数量，使支护体系具有土方开挖方便、主体结构施工空间良好、支撑拆除量少和施工周期短等显著效益。但是环形支撑体系受力复杂，尤其是平面双环支撑，对设计和施工都有较高要求。佛山融利大厦基坑周边用地紧张、基坑规模较大、支护难度大，经综合比选选取平面双环组合支撑+支护桩支护体系，相对于其它支护方案具有明显的经济效益。在对该工程概况、地质水文条件以及基坑支护方案设计论述的基础上，采用三维有限元和理正杆件整体计算方法，模拟分析了该基坑受力状况；结合基坑施工步骤及土方开挖过程中实际监测数据，对比分析与研究了环撑支撑体系的受力特征。研究结果不仅补充了软土地区大型复杂基坑采用双环支撑方式相关的理论内容，而且为今后类似条件下基坑支护方式的实施提供一定参考。
環形支撐體繫以環撐受壓為主要特點，是內支撐體繫中能充分髮揮混凝土材料性能的閤理支撐體繫。環形支撐能優化支撐和豎嚮立柱數量，使支護體繫具有土方開挖方便、主體結構施工空間良好、支撐拆除量少和施工週期短等顯著效益。但是環形支撐體繫受力複雜，尤其是平麵雙環支撐，對設計和施工都有較高要求。彿山融利大廈基坑週邊用地緊張、基坑規模較大、支護難度大，經綜閤比選選取平麵雙環組閤支撐+支護樁支護體繫，相對于其它支護方案具有明顯的經濟效益。在對該工程概況、地質水文條件以及基坑支護方案設計論述的基礎上，採用三維有限元和理正桿件整體計算方法，模擬分析瞭該基坑受力狀況；結閤基坑施工步驟及土方開挖過程中實際鑑測數據，對比分析與研究瞭環撐支撐體繫的受力特徵。研究結果不僅補充瞭軟土地區大型複雜基坑採用雙環支撐方式相關的理論內容，而且為今後類似條件下基坑支護方式的實施提供一定參攷。
배형지탱체계이배탱수압위주요특점，시내지탱체계중능충분발휘혼응토재료성능적합리지탱체계。배형지탱능우화지탱화수향립주수량，사지호체계구유토방개알방편、주체결구시공공간량호、지탱탁제량소화시공주기단등현저효익。단시배형지탱체계수력복잡，우기시평면쌍배지탱，대설계화시공도유교고요구。불산융리대하기갱주변용지긴장、기갱규모교대、지호난도대，경종합비선선취평면쌍배조합지탱+지호장지호체계，상대우기타지호방안구유명현적경제효익。재대해공정개황、지질수문조건이급기갱지호방안설계논술적기출상，채용삼유유한원화리정간건정체계산방법，모의분석료해기갱수력상황；결합기갱시공보취급토방개알과정중실제감측수거，대비분석여연구료배탱지탱체계적수력특정。연구결과불부보충료연토지구대형복잡기갱채용쌍배지탱방식상관적이론내용，이차위금후유사조건하기갱지호방식적실시제공일정삼고。
The main feature of annular support system is annular girder pressed, thus a reasonable support system can give full play to concrete material performance among internal support systems. The annular support can optimize number of support and upright col?umn, make the support system provided with obvious benefit of easy to excavate earthwork, all right major structure construction space, less support removal amount and shorter construction period. But annular support system has more complex stress condition;especially the planar double annular girders support, to design and construction the support all have higher requirements. Land use around the foundation pit of Rongli Building in Foshan is on the edge, the foundation pit is large scale and hard to support, after comprehensive comparison, selected planar double annular girders assembled support+supporting piles support system, with respect to other support schemes, it has obvious economic benefit. Based on project situations, geologic and hydrologic conditions and foundation pit support scheme design and demonstration, through 3D finite element and Lizheng software integral calculation, simulated and analyzed the foundation pit stress state. Combined with foundation pit construction process and actual monitoring data, comparatively analyzed and studied annular support system stress characteristics. The studied result not only enriched soft soil area large complex foundation pit us?ing double annular support means related theoretical content, but also provided certain reference for foundation pit support pattern put into practice under similar conditions.
