摘要:研究目的:静止侧压力系数是地铁设计和施工建设中不可或缺的重要参数，只有取得比较准确的参数 值，才能使设计措施得当，从而保证地铁建设的安全性和经济性。本文依托天津地铁岩土工程勘察实践，对静 止侧压力系数的获取方法和测试数据进行分析研究，总结出不同方法各自的优势和局限性，探讨确定静止侧 压力系数的适宜方法。研究结论:(1)扁铲侧胀试验比较适用于浅部地层静止侧压力系数的测试，旁压试验测得的静止侧压力 系数普遍偏大，室内试验测得的静止侧压力系数则偏小；（2)任何单一方法获取的数据都不是全面、可靠的，应采用扁铲侧胀试验和旁压试验为主的综合试验方法来确定合理的设计参数;（3)本研究成果可为天津及类 似地区的地铁岩土工程勘察中获取土层静止侧压力系数提供借鉴和参考。

Abstract : Research purposes : Static lateral pressure coefficient is indispensable important parameter in metro design， which can make the design measures properly With its accuracy，and it also can ensure the subway construction safety and economy. Relying on the geotechnical engineering practice in Tianjin metro, the access method and test data of the static lateral pressure coefficient are analyzed，the advantages and limitations of different means are summarized，and the appropriate metiiod of tiie static lateral pressure coefficient is discussed. Research conclusions :( 1 ) The flat dilatometer test ( DMT) is suitable for the shallow strata to obtain static lateral pressure coefficient，the lateral pressure test is generally larger，and laboratory test is smaller； (2) Any single way to obtain the data are not comprehensive and reliable， it must adopt a comprehensive method to determine reasonable design parameter； (3 ) The research results can provide reference and reference to obtain the soil static lateral pressure coefficient for t!ie subway of geotechnical investigation in Tianjin and similar areas.