本文選題：填土造地 + 三峽移民　； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：我國的基礎(chǔ)工程建設(shè)取得了突飛猛進的發(fā)展,在隨后的20年左右將迎來前所未有的建設(shè)高峰期,濱海濱庫地帶填土造地逐漸成為濱庫濱海地區(qū)提高土地資源利用率的重要手段,填土造地所帶來的經(jīng)濟、環(huán)境、社會影響成為大家關(guān)注的焦點,同時三峽蓄水后,移民數(shù)量不斷增加,高達達113萬,移民數(shù)量的增加使得土地資源的緊張,人口的迅速增長等更加劇了土地的匱乏。岸坡在天然狀態(tài)下是穩(wěn)定的,通過開挖回填再造之后,土體發(fā)生擾動,加之在岸坡上部建屋鋪路,建筑物的自重加上動荷載作用在岸坡上,則容易發(fā)生失穩(wěn),損壞上層建筑及影響周圍居民正常生活,岸坡失穩(wěn)必然要對庫區(qū)城鎮(zhèn)居民的生命財產(chǎn)安全造成不同程度的威脅�；谏鲜鲅芯勘尘�,本文緊密結(jié)合寧江島岸坡回填工程,提出了分區(qū)填土技術(shù)、濱海濱庫填土岸坡與原岸坡有效結(jié)合技術(shù)、填土與護岸結(jié)構(gòu)同步排水技術(shù)三種關(guān)鍵技術(shù),利用Sigma/w模塊模擬開挖回填及庫水位作用下岸坡應(yīng)力應(yīng)變變化規(guī)律,并將Slope/w模塊和Seep/w模塊進行耦合,研究開挖臺階及水位漲落速度與岸坡穩(wěn)定性之間的關(guān)系,主要的工作及研究成果如下:(1)本文通過查閱大量關(guān)于造地型岸坡的文獻資料,分析其研究現(xiàn)狀,總結(jié)其不足,提出了填土岸坡與原岸坡相容性概念。填土岸坡與原岸坡的相容性就是指填土體與原岸坡界面的有效的契合,實現(xiàn)無縫連接,增大其相互之間的摩擦力,從而增強岸坡穩(wěn)定性。(2)本文從填土體與原岸坡的結(jié)合形式入手,結(jié)合填土體與原岸坡土體性質(zhì)確定了可能的三個滑動面,并基于此展開后續(xù)的模擬工作,通過Slop-w模塊確定了最優(yōu)臺階寬度為2m。(3)基于飽和-非飽和滲流理論,通過Geo-studio模擬軟件模擬最優(yōu)開挖臺階寬度下不同水位漲落速度對寧江島岸坡的穩(wěn)定滲流情況,通過模擬結(jié)果得到了水位漲落速度與岸坡穩(wěn)定滲流之間的變化關(guān)系:水位上漲速度越快,庫水的入滲所產(chǎn)生的孔隙水壓力會大大降低岸坡的穩(wěn)定性。(4)在填土造地工程中,均會涉及填土界面處理、填土的排水及保證穩(wěn)定性等問題,根據(jù)模擬結(jié)果分析出來的穩(wěn)定系數(shù)變化規(guī)律提出了填土造地防護技術(shù)與同步排水技術(shù)。本研究提出的濱海濱庫地帶填土造地的關(guān)鍵技術(shù),能夠在填土造地施工技術(shù)方面發(fā)揮較大作用。
[Abstract]:The construction of basic engineering in our country has made rapid progress, and in the next 20 years or so, it will ushered in an unprecedented peak of construction. The reclamation of land in coastal areas has gradually become an important means to improve the utilization rate of land resources in coastal areas. The economic, environmental and social impacts of land reclamation have become the focus of attention. At the same time, after the three Gorges impoundment, the number of migrants has been increasing, reaching as high as 1.13 million. The increase in the number of migrants has made the land resources tight. Rapid population growth has exacerbated the scarcity of land. The slope is stable in the natural state. After excavation, backfilling and reengineering, the soil is disturbed. In addition, when the upper part of the bank slope is paved, the weight of the building and the dynamic load on the bank slope are liable to destabilize. Damaging superstructure and affecting the normal life of the surrounding residents, slope instability will inevitably pose a threat to the safety of life and property of urban residents in the reservoir area. Based on the above research background, three key technologies are put forward in this paper, which are combined with the backfill project of Ningjiang Island bank slope, the effective combination of coastal bank fill slope and original bank slope, and the simultaneous drainage technology of fill and bank protection structure. The Sigma/w module is used to simulate the stress-strain variation law of bank slope under the action of excavation backfill and reservoir water level, and the Slope/w module and Seep/w module are coupled to study the relationship between excavation step, water level fluctuation speed and slope stability. The main work and research results are as follows: (1) by consulting a large number of documents about land-based bank slope, this paper analyzes its research status, summarizes its deficiency, and puts forward the concept of compatibility between fill bank slope and original bank slope. The compatibility between the fill slope and the original bank slope refers to the effective fit between the fill soil and the original bank slope, to realize the seamless connection and to increase the friction between the fill soil and the original bank slope. So as to enhance the stability of bank slope, this paper starts with the form of combination of fill soil and original bank slope, determines three possible sliding surfaces combined with the properties of filling soil and original bank slope soil, and carries out subsequent simulation work based on this. Based on the saturated-unsaturated seepage theory, the stable seepage flow of Ningjiang island slope under different water level fluctuation velocities under optimal excavation step width is simulated by Geo-studio software based on the Slop-w module. Through the simulation results, the relationship between the fluctuation velocity of water level and the steady seepage flow on the bank slope is obtained: the faster the water level rises, the lower the pore water pressure caused by the infiltration of the reservoir water will greatly reduce the stability of the bank slope. All the problems are related to the treatment of the interface of the fill, the drainage of the fill and the guarantee of the stability. According to the variation law of the stability coefficient analyzed from the simulation results, the technology of land reclamation protection and synchronous drainage are put forward. The key technologies proposed in this study can play an important role in the construction of land reclamation.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU447;P748

【參考文獻】

相關(guān)期刊論文 前4條

1 李連崇;唐春安;邢軍;唐烈先;;節(jié)理巖質(zhì)邊坡變形破壞的RFPA模擬分析[J];東北大學(xué)學(xué)報;2006年05期

2 高連通;晏鄂川;劉珂;;考慮降雨條件的堆積體滑坡多場特征研究[J];工程地質(zhì)學(xué)報;2014年02期

3 陳振民;;SLOPE/W軟件總應(yīng)力法和有效應(yīng)力法的應(yīng)用[J];水運工程;2009年07期

4 謝海瀾,王清;粉煤灰加固處理吹填泥漿的試驗研究[J];巖石力學(xué)與工程學(xué)報;2005年10期

相關(guān)碩士學(xué)位論文 前1條

1 楊靜梅;填方邊坡基底造型技術(shù)研究[D];重慶大學(xué);2007年

，

本文編號：1945536