The northeast edge of Wan Hao Li Cheng SI Engineering is adjacent to Hedong 110 kV Substation of the State Grid, considering the complexity of surrounding environment and the safety and economic of the support engineering, the supporting scheme was computed by using the subsection method and li - zheng deep foundation pit software. The edge of I segment pit, which is 2. 0 meters away from the substation, is sensitive to soil deformation, the narrow space can not step - slope excavate , and soil nailing wall can not meet the security requirements of the lateral wall, thus, the pile -anchor retaining structure is selected; the surroundings of II segment are roads and extensive spaces, the step - slope soil nailing wall supporting structure is adopted. The results show that, the global stability of the pile - anchor retaining segment and various parameters such as anti - overturning and resistant heave; and the parameters like local tensile and internal and external stability of the step -slope soil nailing wall supporting segment all meet the requirements of specifications, the whole design schemes is feasible, reasonable and economic.%万浩俪城S1工程东北边缘毗邻国家电网河东110 kV变电站,考虑到基坑周围环境的复杂性与支护工程的安全经济性,采取分段计算分析的方法,运用理正深基坑软件进行支护方案设计的计算.其中,Ⅰ段,基坑边缘距变电站2.0m,对土体变形敏感,空间狭窄无法放坡开挖,且土钉墙不能满足侧壁安全要求,选用桩锚支护结构；Ⅱ段周边为道路及开阔空地,采用放坡土钉墙支护结构.计算结果表明:桩锚支护段整体稳定性、抗倾覆、抗隆起等各项参数,放坡土钉墙支护段局部抗拉、内外部稳定性等参数,均满足规范要求,总体设计方案技术可行、合理经济.
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