【摘要】：隨著國(guó)家基礎(chǔ)建設(shè)的快速發(fā)展，黃土地區(qū)的工程項(xiàng)目越來(lái)越多。黃土的濕陷性問(wèn)題隨即成為施工工程的研究熱點(diǎn)�？此品�(wěn)固的黃土在浸水后，工程特性急劇變化，強(qiáng)度迅速降低。黃土濕陷引發(fā)的工程事故中，又以基坑支護(hù)結(jié)構(gòu)失穩(wěn)為主。因此，基坑的變形監(jiān)測(cè)工作越來(lái)越重要。 但是現(xiàn)行的《建筑基坑工程監(jiān)測(cè)技術(shù)規(guī)范》（GB50497-2009）明確指出不適合濕陷性黃土地區(qū)。而《濕陷性黃土地區(qū)建筑規(guī)范》（GB50025-2004）與《濕陷性黃土地區(qū)建筑基坑工程安全技術(shù)規(guī)程》（JGJ167-2009）對(duì)基坑監(jiān)測(cè)的項(xiàng)目、頻率及預(yù)警值的規(guī)定較為模糊，實(shí)際工程中操作難度較大。 本文通過(guò)對(duì)國(guó)內(nèi)外濕陷性黃土和基坑變形監(jiān)測(cè)的研究現(xiàn)狀歸納整理后，結(jié)合實(shí)際工程，主要的研究?jī)?nèi)容有如下幾個(gè)方面： 1、系統(tǒng)分析了黃土的分布、成因、微觀結(jié)構(gòu)、濕陷機(jī)理及工程特性等問(wèn)題； 2、研究了濕陷性黃土地區(qū)常見(jiàn)的基坑支護(hù)結(jié)構(gòu)類型特點(diǎn)、適用范圍以及不同支護(hù)結(jié)構(gòu)機(jī)理的監(jiān)測(cè)內(nèi)容； 3、對(duì)現(xiàn)行常規(guī)基坑監(jiān)測(cè)項(xiàng)目的施測(cè)方法進(jìn)行歸納分析，并結(jié)合規(guī)范對(duì)濕陷性黃土地區(qū)基坑監(jiān)測(cè)的預(yù)警值和監(jiān)測(cè)頻率確定方法進(jìn)行研究； 4、結(jié)合西安地區(qū)一典型濕陷性黃土地層深基坑監(jiān)測(cè)數(shù)據(jù)，分析不同支護(hù)結(jié)構(gòu)在施工期間的變形情況，，并驗(yàn)證本研究提出的制定監(jiān)測(cè)頻率和預(yù)警值方法的合理性。 綜上所述，本文較系統(tǒng)的研究了濕陷性黃土地區(qū)基坑監(jiān)測(cè)工作的重點(diǎn)內(nèi)容，針對(duì)濕陷性黃土地區(qū)提出了基坑監(jiān)測(cè)預(yù)警值及監(jiān)測(cè)頻率的確定方法，對(duì)優(yōu)化濕陷性黃土地區(qū)基坑監(jiān)測(cè)工作效率及經(jīng)濟(jì)效益具有理論和現(xiàn)實(shí)意義。
[Abstract]:With the rapid development of national infrastructure, there are more and more engineering projects in loess area. The collapsibility of loess becomes the research hotspot of construction engineering. After soaking in water, the seemingly stable loess has a sharp change in engineering properties and a rapid decrease in strength. In the engineering accidents caused by loess collapsibility, the instability of foundation pit support structure is the main factor. Therefore, the deformation monitoring of foundation pit is becoming more and more important. However, the current Technical Code for Monitoring of Foundation Pit Engineering (GB50497-2009) clearly points out that it is not suitable for collapsible loess areas. However, the regulation of frequency and early warning value of foundation pit monitoring items in collapsible loess area (GB50025-2004) and collapsible loess area (JGJ167-2009) is rather fuzzy, and the operation is difficult in practical engineering. After summing up the research status of collapsible loess and foundation pit deformation monitoring at home and abroad and combining with practical engineering, the main research contents are as follows: 1. The distribution and cause of loess are systematically analyzed. The microstructure, collapsing mechanism and engineering characteristics are discussed. 2. The common characteristics of foundation pit supporting structure in collapsible loess area, the applicable scope and the monitoring content of different supporting structure mechanism are studied. 3. Generalize and analyze the current routine foundation pit monitoring project, and study the early warning value and monitoring frequency determination method of foundation pit monitoring in collapsible loess area. 4. Based on the monitoring data of deep foundation pit of a typical collapsible loess stratum in Xi'an area, the deformation of different supporting structures during construction is analyzed, and the rationality of the method of establishing monitoring frequency and early warning value proposed in this study is verified. To sum up, this paper systematically studies the key contents of foundation pit monitoring in collapsible loess area, and puts forward a method to determine the monitoring and warning value and monitoring frequency of foundation pit in collapsible loess area. It is of theoretical and practical significance to optimize the efficiency and economic benefit of foundation pit monitoring in collapsible loess area.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU753

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 謝定義;黃土力學(xué)特性與應(yīng)用研究的過(guò)去、現(xiàn)在與未來(lái)[J];地下空間;1999年04期

2 胡瑞林,官國(guó)琳,李向全,張禮中;黃土濕陷性的微結(jié)構(gòu)效應(yīng)[J];工程地質(zhì)學(xué)報(bào);1999年02期

3 惠治鑫;馬良榮;;自重濕陷性黃土場(chǎng)地浸水樓房整體傾斜的監(jiān)測(cè)與分析[J];寧夏師范學(xué)院學(xué)報(bào);2008年06期

4 周二眾;劉星;青舟;;深基坑監(jiān)測(cè)預(yù)警系統(tǒng)的研究與實(shí)現(xiàn)[J];地下空間與工程學(xué)報(bào);2013年01期

5 蔣希雁,陸培毅;黃土濕陷機(jī)理和影響因素分析[J];河北建筑工程學(xué)院學(xué)報(bào);2004年01期

6 雷祥義;中國(guó)黃土的孔隙類型與濕陷性[J];中國(guó)科學(xué)(B輯 化學(xué) 生物學(xué) 農(nóng)學(xué) 醫(yī)學(xué) 地學(xué));1987年12期

7 徐偉，呂鳳梧，胡曉依;大型深基坑施工方案的設(shè)計(jì)優(yōu)化[J];建筑技術(shù);1996年08期

8 高國(guó)瑞;中國(guó)黃土的微結(jié)構(gòu)[J];科學(xué)通報(bào);1980年20期

9 姜有生;楊溥;;濕陷性黃土地區(qū)基坑支護(hù)的特性與支護(hù)類型優(yōu)選[J];青海師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年02期

10 羅宇生;;濕陷性黃土的工程特性[J];陜西建筑;2008年03期

相關(guān)博士學(xué)位論文 前1條

1 唐亞明;陜北黃土滑坡風(fēng)險(xiǎn)評(píng)價(jià)及監(jiān)測(cè)預(yù)警技術(shù)方法研究[D];中國(guó)地質(zhì)大學(xué)（北京）;2012年

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