CAJ | 학술논문

为减少城市中复杂周边环境下明挖隧道基坑因围护结构选型不合理造成的施工事故和经济浪费，在总结前人研究成果的基础上，以长沙市南湖路湘江隧道岸上段明挖基坑为例，对周边建筑物和管线密集道路下的深基坑、相互交错且不同深度的隧道基坑及相互临近基坑的围护结构选型和设计进行了较为详细地介绍，并得出以下结论：1）对于城市道路下明挖基坑，特别是对于路下管网和建筑物密集地段，建议采用防止侧向变形较好的排桩（或连续墙）＋内支撑的围护结构形式，可以有效地控制基坑变形；2）对于基坑深度差别不大，且具有一定距离的临近基坑，建议采用互不影响的共用对拉围护结构；3）对于复杂线路、深度差别较大，且基坑之间夹层较薄的交错基坑，建议采用共用基坑短桩及有限放坡的围护结构形式。
위감소성시중복잡주변배경하명알수도기갱인위호결구선형불합리조성적시공사고화경제낭비，재총결전인연구성과적기출상，이장사시남호로상강수도안상단명알기갱위례，대주변건축물화관선밀집도로하적심기갱、상호교착차불동심도적수도기갱급상호림근기갱적위호결구선형화설계진행료교위상세지개소，병득출이하결론：1）대우성시도로하명알기갱，특별시대우로하관망화건축물밀집지단，건의채용방지측향변형교호적배장（혹련속장）＋내지탱적위호결구형식，가이유효지공제기갱변형；2）대우기갱심도차별불대，차구유일정거리적림근기갱，건의채용호불영향적공용대랍위호결구；3）대우복잡선로、심도차별교대，차기갱지간협층교박적교착기갱，건의채용공용기갱단장급유한방파적위호결구형식。
The on-shore section of Nanhulu Xiangjiang river crossing tunnel in Changsha has different types of foundation pits.Proper retaining structures should be selected for these different types of foundation pits so as to avoid accidents during construction and,on the other hand,to minimize the construction cost.In the paper,the selection and design of proper retaining structures for these different types of foundation pits are presented.Conclusions drawn are as follows:1 ) For open-cut foundation pits under urban roads,especially for foundation pits interfered with concentrated utility lines and buildings,retaining structures consisting of rowed piles (or diaphragm walls)and internal bracing should be adopted so as to control the lateral deformation;2)For neighboring foundation pits with almost the same depths and some distance in between,tying retaining structures should be adopted;3 ) For alignment-complex foundation pits with great depth difference and small spacing,retaining structures with common short piles and open cutting should be adopted.