岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2013年
3期
769-775
,共7页
郭爱国%孔令伟%沈林冲%张金荣%王勇%秦建设%黄先锋
郭愛國%孔令偉%瀋林遲%張金榮%王勇%秦建設%黃先鋒
곽애국%공령위%침림충%장금영%왕용%진건설%황선봉
浅层气%杭州地铁%危害防治
淺層氣%杭州地鐵%危害防治
천층기%항주지철%위해방치
shallow gas%Hangzhou metro%disaster prevention and control
杭州地铁1号线在勘察过程中发现很多区段在埋深15~35 m的土层中存在一定压力的浅层气,浅层气的存在不但对勘察的安全实施构成一定的威胁,而且会影响地铁构筑物的正常施工,如果采取的防治措施不当,还会进一步威胁到地铁的后期运营.浅层气问题是杭州地铁1号线建设中遇到的难题之一,但目前国内外在地铁建设中大范围遇到浅层气的实例还比较少,防治浅层气危害的方法和积累的经验都十分有限.在综合分析研究杭州地区浅层气和含气土层工程特性的基础上,考虑杭州地铁工程不同建设阶段的特点,结合在实际工程的经验,以及室内试验和监测结果,提出有针对性的危害防治对策,为地铁工程建设和后期运营的安全提供帮助,也可为类似地区地下工程的建设提供参考.
杭州地鐵1號線在勘察過程中髮現很多區段在埋深15~35 m的土層中存在一定壓力的淺層氣,淺層氣的存在不但對勘察的安全實施構成一定的威脅,而且會影響地鐵構築物的正常施工,如果採取的防治措施不噹,還會進一步威脅到地鐵的後期運營.淺層氣問題是杭州地鐵1號線建設中遇到的難題之一,但目前國內外在地鐵建設中大範圍遇到淺層氣的實例還比較少,防治淺層氣危害的方法和積纍的經驗都十分有限.在綜閤分析研究杭州地區淺層氣和含氣土層工程特性的基礎上,攷慮杭州地鐵工程不同建設階段的特點,結閤在實際工程的經驗,以及室內試驗和鑑測結果,提齣有針對性的危害防治對策,為地鐵工程建設和後期運營的安全提供幫助,也可為類似地區地下工程的建設提供參攷.
항주지철1호선재감찰과정중발현흔다구단재매심15~35 m적토층중존재일정압력적천층기,천층기적존재불단대감찰적안전실시구성일정적위협,이차회영향지철구축물적정상시공,여과채취적방치조시불당,환회진일보위협도지철적후기운영.천층기문제시항주지철1호선건설중우도적난제지일,단목전국내외재지철건설중대범위우도천층기적실례환비교소,방치천층기위해적방법화적루적경험도십분유한.재종합분석연구항주지구천층기화함기토층공정특성적기출상,고필항주지철공정불동건설계단적특점,결합재실제공정적경험,이급실내시험화감측결과,제출유침대성적위해방치대책,위지철공정건설화후기운영적안전제공방조,야가위유사지구지하공정적건설제공삼고.
The shallow gas with a certain pressure is found in depths of 15-35 m in many sections of Hangzhou Metro Line No.1 during the detailed exploration. It not only constitutes a threat to the safety of investigation, but also influences the normal construction of the metro structures. It will be a threat to the later operation of metro if unsuitable prevention and control countermeasures are adopted. Shallow gas is one of the challenges met in construction of Hangzhou Metro Line No.1. However, at present, the case study with such large scale shallow gas is few in the history of metro construction at home and abroad;and the methods for preventing shallow gas disaster and the experiences are quite limited. Based on the studies of engineering properties of shallow gas and soil containing gas in Hangzhou area, considering the characteristics of Hangzhou metro engineering in different construction stages, and combining the practical engineering experience and the results of laboratory test and field monitoring, some pertinent disaster countermeasures are proposed. The countermeasures may supply assistance to metro construction and later operation, and also can give a reference to underground constructions in similar areas.