本文選題：軟弱地質(zhì) + 承臺(tái)��； 參考：《世界橋梁》2016年06期

【摘要】：珠海橫琴二橋跨天沐河段橋型為2聯(lián)3×50m預(yù)應(yīng)力鋼筋混凝土寬幅連續(xù)箱梁橋,該橋94號(hào)~97號(hào)墩承臺(tái)地處深厚軟弱地質(zhì)條件,為確保鋼板樁圍堰支護(hù)結(jié)構(gòu)的穩(wěn)定及安全性,綜合考慮承臺(tái)結(jié)構(gòu)尺寸、承臺(tái)埋深、地質(zhì)及水文條件后,確定采用復(fù)合地基處理與鋼板樁圍堰相結(jié)合的方案。鋼板樁圍堰平面尺寸為12.2m×11m,拉森Ⅳ型Q345B鋼板樁長(zhǎng)18m,圍堰內(nèi)設(shè)2道內(nèi)支撐。封底混凝土面下淤泥層采用9m長(zhǎng)水泥攪拌樁加固成復(fù)合地基。采用等值梁法對(duì)鋼板樁圍堰進(jìn)行力學(xué)計(jì)算,并采用MIDAS Civil有限元軟件建立最不利工況梁?jiǎn)卧Ｐ?采用容許應(yīng)力法對(duì)鋼板樁強(qiáng)度、內(nèi)支撐、基坑底土抗隆起進(jìn)行驗(yàn)算,結(jié)果均滿足規(guī)范要求。
[Abstract]:In order to ensure the stability and safety of steel sheet pile cofferdam support structure, the bridge type of Tianmu River reach of Hengqin II Bridge in Zhuhai is 2 United 3 脳 50 m prestressed reinforced concrete wide width continuous box girder bridge. The cap of pier 94 ~ 97 of this bridge is located in deep soft geological conditions, in order to ensure the stability and safety of steel sheet pile cofferdam support structure. After considering the structural size of the cap, the depth of the cap, the geological and hydrological conditions, the combination of composite foundation treatment and steel sheet pile cofferdam is determined. The plane dimension of steel plate pile cofferdam is 12.2m 脳 11m, the length of Larsen 鈪，

本文編號(hào)：1817378