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（中鐵第一勘察設(shè)計院集團(tuán)有限公司， 西安 710043）
［摘要］在西安站改擴(kuò)建工程中，西安f3地裂縫從西安站車場斜向穿過，其中高架候車室、市政地下通廊及東配樓等建筑受其影響。采取了以下概念設(shè)計和措施來降低地裂縫對本工程的危害：整體設(shè)計上，采用了高架候車室與市政地下通廊分離式的布置方式，使得軌道層完全避開地裂縫的影響；高架候車室等上部結(jié)構(gòu)采用上下盤基礎(chǔ)避讓，跨越地裂縫結(jié)構(gòu)采用簡支鋼桁架連廊的方式，市政地下通廊通過分段設(shè)置將結(jié)構(gòu)分成幾段斜交箱涵結(jié)構(gòu)，以適應(yīng)地裂縫變形要求。通過整體概念設(shè)計、有限元數(shù)值模擬及縮尺模型振動臺試驗(yàn)表明，跨地裂縫簡支鋼桁架連廊可適應(yīng)地裂縫及大震的變形，達(dá)到“大震不倒”的性能要求；市政地下通廊應(yīng)力、應(yīng)變均可滿足地裂縫的變形要求。
［關(guān)鍵詞］西安站；改擴(kuò)建工程；鋼桁架；斜交箱涵；振動臺試驗(yàn)；地裂縫
中圖分類號：TU352文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)03-0051-05
Study on concept design and measures of across ground fissure structure in reconstruction and extension project of Xi′an railway station
CAI Yujun
(China Railway First Survey & Design Institute Group Co., Ltd.， Xi′an 710043， China)
Abstract:In the reconstruction and expansion project of Xi′an Railway Station，the f3 ground fissure crosses diagonally from the Xi′an Railway Station parking lot, and the buildings such as elevated waiting room, municipal underground corridor and east distribution building are affected by it. The following concept designs and measures was adopted to reduce the damage of ground fissures to the project: in the overall design, the separation layout of elevated waiting room and municipal underground corridor was adopted, so that the track layer can completely avoid the influence of ground fissures; the upper structure such as the elevated waiting room adopted the upper and lower wall foundation to avoid, and the structure crossing the ground fissure adopted the simply supported steel truss, the municipal underground corridor was divided into several sections of skew box culvert structure to adapt to the deformation requirements of ground fissures. Through overall concept design, finite element numerical simulation and scale shaking table model test, it is shown that the simply supported steel truss corridor across ground fissures can adapt to the deformation of ground fissures and large earthquakes, and meet the performance requirements of "no collapse in large earthquakes"；the stress and strain of the municipal underground corridor can meet the deformation requirements of ground fissures.
Keywords:Xi′an railway station;reconstruction and extension project;steel truss;skew box culvert;shaking table test; ground fissure
*中鐵第一勘察設(shè)計院集團(tuán)有限公司科研項(xiàng)目（院科18-42、院科20-58）。
作者簡介：蔡玉軍，碩士，正高級工程師，一級注冊結(jié)構(gòu)工程師，Email：525980939@qq.com。
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