大连地铁1、2号线区间工法选择研究

RESEARCH ON CONSTRUCTION METHOD OPTIONS FOR SUBWAY INTERVAL TUNNELS IN DALIAN METRO LINE 1 AND 2

工法选择对地铁区间工程造价、工期、运营效果等产生直接的影响。为了研究适合大连地层特点的工法选择规律,以便为后续线路区间工法选择提供参考。文中通过对大连地铁1、2号线工程区间工法选择结果的对比分析,并结合三个典型区间进一步研究论证大连地铁1、2号线区间工法选择的主要控制因素。大连地铁1、2号线区间多数穿越中风化岩层或上软下硬地层,70%以上区间选用矿山法施工;富水地层,因周边环境风险源敏感而无法爆破的区间采用盾构法施工;周边环境条件好,地质条件差的人工填海区内的区间采用明挖法施工。

Construction method options has a direct influence on the construction cost, construction period and operation effect of Metro section. In order to study the law of suitable construction method options for Dalian stratigraphic characteristics, so as to provide a reference for the following lines. The main control factors in Dalian Metro Line 1 and 2 are further studied and demonstrated, through comparative analysis of construction method option results, and combined with three typical interval’s experience. Most of the Dalian Metro Lines 1 and 2 cross the middle weathered rock layer or the upper soft and hard stratum, and more than 70% of the interval is selected by the mining method;the water-rich stratum is constructed by the shield method because the surrounding environmental risk source is sensitive and cannot be blasted;The surrounding environment is good, and the section of the artificial reclamation area with poor geological conditions is constructed by cut and cover method.