天津滨海新区地下空间开发适宜性评价

依据现有研究成果,本文论述了天津滨海新区工程地质背景.选取淤泥质土厚度、20 m以浅粉砂土分布、第Ⅰ海相层底板埋深、地面沉降、地下水腐蚀性为评价因子,采用层次分析和综合评分数学模型,对滨海新区非明开挖及时支护的线性地下空间工程进行了适宜性评价.评价结果表明,区内东部沿海边一带地下空间开发适宜性较差,盾构施工及支护难度较大,占总面积的24%;西部、南部及北部地下空间开发适宜性较好,盾构施工及支护难度小,占总面积的46%;其余区域为一般区,盾构施工及支护难度中等,占总面积的30%.

Suitability Evaluation for Underground Space Development in Binhai New Area,Tianjin

Based on previous research results, this paper discusses the engineering geological background in Bin-hai New Area,Tianjin. We assess underground space suitability evaluation in Binhai New Area by selecting mucky soil thickness, silty soil distribution(<20 m), aquifer bottom plate depth of the first marine beds, land sub-sidence, groundwater corrosion as evaluation factors and applying analytical hierarchy process and mathematical model. The results show that eastern coastal area,making up 24%of the total area, experiences poor evaluation re-sults with difficulty in shield construction and foundation pit support. North,west and south of the area,making up 46% of the total area, experiences good evaluation results and is easy in shield construction and foundation pit support. Other parts of the area is general area with normal difficulty in shield construction and foundation pit support.