本文選題：巖土工程 + 半成巖�。� 參考：《巖石力學(xué)與工程學(xué)報(bào)》2017年10期

【摘要】：半成巖是一種半巖半土的特殊工程地質(zhì)載體,目前針對(duì)半成巖力學(xué)特性的研究較少。依托馬普托大橋南側(cè)錨碇工程,設(shè)計(jì)可同時(shí)進(jìn)行巖基承載及兩相膠結(jié)面剪切的現(xiàn)場(chǎng)試驗(yàn)框架,開(kāi)展基底細(xì)砂半成巖載荷試驗(yàn)和混凝土 半成巖兩相膠結(jié)面剪切現(xiàn)場(chǎng)試驗(yàn),獲得細(xì)砂半成巖的承載和剪切力學(xué)參數(shù),進(jìn)一步深入研究和討論半成巖變形模量的預(yù)測(cè)方法及混凝土 半成巖兩相膠結(jié)面剪切破壞的形態(tài)及機(jī)制。研究表明細(xì)砂半成巖的承載性能與巖石類似,采用基于現(xiàn)場(chǎng)地質(zhì)條件的經(jīng)驗(yàn)方法可以較準(zhǔn)確地估算半成巖的變形模量;細(xì)砂半成巖的混凝土 半成巖兩相剪切具有獨(dú)特的性質(zhì),其低致密性導(dǎo)致與混凝土形成很強(qiáng)的膠結(jié)作用和較明顯的膠結(jié)帶,從而增加了兩相膠結(jié)面的粗糙程度。在預(yù)測(cè)混凝土與半成巖兩相膠結(jié)抗剪強(qiáng)度時(shí),需充分考慮混凝土浸入半成巖的膠結(jié)作用。研究結(jié)果為大橋錨碇設(shè)計(jì)提供了可靠的參數(shù)支持,為類似地質(zhì)條件的工程提供可靠依據(jù)。
[Abstract]:Half diagenesis is a special engineering geological carrier of half rock and half soil. Based on the south side Anchorage engineering of Maputo Bridge, the field test frame of rock foundation loading and two-phase cementation face shear can be designed simultaneously, and the loading test of subgrade fine sand and the shear field test of concrete semi-diagenetic two-phase cementation surface are carried out. The load-bearing and shear mechanical parameters of semi-diagenesis of fine sand are obtained, and the prediction method of deformation modulus of semi-diagenetic rock and the form and mechanism of shear failure of concrete semi-diagenetic two-phase cementation surface are studied and discussed. The results show that the bearing capacity of fine sand semi-diagenesis is similar to that of rock, and the deformation modulus of semi-diagenetic rock can be estimated more accurately by using the empirical method based on field geological conditions. The two-phase shear of concrete with fine sand and semi-diagenesis has unique properties, and its low compactness results in strong cementation with concrete and obvious cementation zone, thus increasing the roughness of the two-phase cementation surface. In predicting the shear strength of concrete and semi-diagenetic two-phase cementation, the cementation of concrete immersed in semi-diagenesis should be fully considered. The results provide reliable parameter support for bridge Anchorage design and reliable basis for similar geological engineering.
【作者單位】： 東南大學(xué)土木工程學(xué)院;東南大學(xué)混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室;中國(guó)路橋工程有限責(zé)任公司;
【基金】：國(guó)家自然科學(xué)青年基金資助項(xiàng)目(41602300) 江蘇省青年基金資助項(xiàng)目(BK20150618) 中國(guó)礦業(yè)大學(xué)深部巖土力學(xué)與地下工程國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金資助項(xiàng)目(SKLGDUEK1503)~~
【分類號(hào)】：U442.2;U443.24

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