本文選題：廈門市　切入點(diǎn)：填海造地　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來(lái),隨著沿海城市經(jīng)濟(jì)和人口的快速增長(zhǎng),土地資源越來(lái)越緊張,大面積的填海造陸成為了各地解決土地緊缺問(wèn)題的主要手段。大面積的圍填海造地為沿海社會(huì)經(jīng)濟(jì)的發(fā)展發(fā)揮了重要的作用。但是,圍填海造地開(kāi)拓出來(lái)的土地由于含水量過(guò)高以及土體固結(jié)程度差等一系列的原因不利于工程建設(shè),容易造成一系列的工程地質(zhì)問(wèn)題,必須經(jīng)過(guò)一定的地基處理才能進(jìn)行后續(xù)的施工和建設(shè)。在大量搜集鉆孔資料的基礎(chǔ)上,結(jié)合本次鉆孔勘探,基本查明填海區(qū)各主要巖土層的分布、埋深、厚度等情況。結(jié)合巖土體原位測(cè)試和室內(nèi)土工試驗(yàn)所得的物理力學(xué)指標(biāo),判定了環(huán)東海域填海區(qū)砂土液化等級(jí)并進(jìn)行了分區(qū),估算了環(huán)東海域填海區(qū)場(chǎng)地地基承載力,對(duì)軟土地基沉降預(yù)測(cè)方法進(jìn)行探討�；静槊髁颂钔羺^(qū)的范圍以及海岸帶類型及淤積情況。取得主要結(jié)論如下:1、區(qū)內(nèi)出露及揭露的地層主要由新近吹填土(Q~s)、第四系全新統(tǒng)海積層(Q_h~m)、沖洪積層(Q_h~(al-pl)),晚更新統(tǒng)沖洪積層(Q_(p3)~(al-pl))和殘積層(Q~(el))組成,基巖為燕山晚期各風(fēng)化帶黑云母花崗巖(r_5~(3(1)b))及凝灰熔巖。2、區(qū)內(nèi)新構(gòu)造活動(dòng)較為強(qiáng)烈,主要表現(xiàn)形式為地震和斷塊的升降等,區(qū)內(nèi)的地震烈度定為Ⅶ度。3、環(huán)東海域淤泥廣泛分布,由于淤泥的工程地質(zhì)特性,而且在7度地震作用下,會(huì)產(chǎn)生軟土震陷現(xiàn)象,不宜作為天然地基,因此在環(huán)東海域填海區(qū)進(jìn)行建筑時(shí),均應(yīng)采用地基處理措施。4、環(huán)東海域填海區(qū)上部吹填土,厚度較大,呈飽和松散狀,力學(xué)強(qiáng)度低,在發(fā)生區(qū)域地震烈度達(dá)7度,會(huì)產(chǎn)生砂土液化現(xiàn)象;全新統(tǒng)沖洪積砂土層,飽和,松散-稍密狀態(tài),埋深及厚度變化較大,該層在7度地震作用下,也會(huì)產(chǎn)生液化現(xiàn)象。在進(jìn)行工程建設(shè)時(shí),必須采取措施減輕飽和砂土液化影響。5、環(huán)東海域填海區(qū)圍海工程多、分布范圍廣,海岸線較長(zhǎng),并有擴(kuò)大趨勢(shì),納潮量減少大,淤積趨勢(shì)加強(qiáng)。在城市建設(shè)規(guī)劃布局時(shí)應(yīng)對(duì)此加以重視和協(xié)調(diào)。
[Abstract]:In recent years, with the rapid growth of the coastal city of economy and population, land resources increasingly tense, a large area of land reclamation has become the main means to solve the problem of the shortage of local land reclamation. It plays an important role in the development of the coastal economic and social area. However, the reclamation of land because of opening up the water is too high and the consolidation degree difference and a series of reasons for engineering construction, easy to cause a series of engineering geological problem, must go through to the construction of foundation treatment and construction in the future. Based on a large amount of collected drilling data, combined with the drilling exploration, identify the distribution, the main rock reclamation area the soil depth, thickness and so on. Combined with the physical and mechanical parameters of rock and soil in situ test and laboratory soil test income, determine the Central East Sea Reclamation sand liquid 鍖栫瓑綰у茍榪涜浜?jiǎn)鍒嗗專?

本文編號(hào)：1617136