本文選題：水泥土 + 侵蝕��； 參考：《巖土力學(xué)》2014年12期

【摘要】：港珠澳大橋拱北隧道地處沿海地區(qū),其地下水與海水相連,隧道基底采用粉體噴射攪拌法和高壓噴射注漿法等方法進(jìn)行加固,加固產(chǎn)生的水泥土在海水侵蝕性離子作用下其強(qiáng)度和穩(wěn)定性會(huì)發(fā)生變化,從而對(duì)工程安全產(chǎn)生影響。根據(jù)上述兩種施工工藝,制作內(nèi)部含侵蝕物質(zhì)和不含侵蝕物質(zhì)的兩種水泥土試塊,配制多種不同濃度的單組分的化學(xué)溶液來(lái)模擬海水侵蝕環(huán)境,將制備的水泥土試塊置于侵蝕溶液中進(jìn)行預(yù)定時(shí)間的短時(shí)(≤28 d)浸泡,通過(guò)無(wú)側(cè)限抗壓試驗(yàn)、電鏡掃描以及離子色譜測(cè)定,分別得到了單組分侵蝕溶液短時(shí)浸泡下水泥土試塊無(wú)側(cè)限抗壓強(qiáng)度、微觀結(jié)構(gòu)隨侵蝕溶液濃度和侵蝕時(shí)間的變化規(guī)律,以及侵蝕環(huán)境中離子濃度隨侵蝕時(shí)間的變化規(guī)律�；诤Ｋ瘜W(xué)成分,配制多種不同濃度的雙組分的化學(xué)溶液來(lái)模擬海水侵蝕環(huán)境,將制備的內(nèi)部含侵蝕物質(zhì)的淤泥質(zhì)土水泥土試塊置于侵蝕溶液中進(jìn)行預(yù)定時(shí)間的長(zhǎng)時(shí)(≥90 d)浸泡,通過(guò)無(wú)側(cè)限抗壓試驗(yàn)得到了雙組分侵蝕溶液長(zhǎng)時(shí)浸泡下水泥土試塊無(wú)側(cè)限抗壓強(qiáng)度變化規(guī)律。試驗(yàn)結(jié)果可為臨時(shí)性及長(zhǎng)期性水泥土工程的設(shè)計(jì)及安全維護(hù)提供一定參考依據(jù)。
[Abstract]:The Gongbei Tunnel of Hongkong-Zhuhai-Macao Bridge is located in the coastal area, and its groundwater is connected with seawater. The foundation of the tunnel is strengthened by powder jet mixing method and high-pressure jet grouting method. The strength and stability of cement-soil under the action of seawater corrosive ions will change, which will affect the engineering safety. According to the above two construction techniques, two kinds of cement soil test blocks containing and without erosive substances are made, and a variety of chemical solutions of one component with different concentrations are prepared to simulate the environment of seawater erosion. The cement-soil samples were immersed in erosion solution for a short time (鈮，

本文編號(hào)：1845985