【摘要】：隨著經(jīng)濟(jì)科技的發(fā)展和社會(huì)的進(jìn)步,人民生活水平不斷提高,交通等基礎(chǔ)設(shè)施的建設(shè)得到了極大的發(fā)展。然而,我國(guó)幅員遼闊,地形地貌復(fù)雜多變,這就對(duì)交通設(shè)施的建設(shè)提出了較高的要求,特別是在復(fù)雜軟巖地區(qū)道路的建設(shè)。為了保證所建道路的安全,需要對(duì)道路建設(shè)區(qū)域影響范圍內(nèi)的挖方或填方區(qū)域采取相應(yīng)的加固措施,以防止道路施工及運(yùn)營(yíng)過(guò)程中,由于地質(zhì)不良因素造成的工程事故或交通事故。雖然目前對(duì)于挖方和填方區(qū)域的加固技術(shù)已經(jīng)相對(duì)成熟,但由于地質(zhì)、氣候等綜合因素的影響,不同的區(qū)域需要有不同的加固形式。為了保證在道路施工期間其影響范圍內(nèi)加固支護(hù)結(jié)構(gòu)的穩(wěn)定性,需對(duì)該區(qū)域的結(jié)構(gòu)進(jìn)行變形觀測(cè),以便隨時(shí)掌握邊坡穩(wěn)定性動(dòng)態(tài)。該變形觀測(cè)主要分為兩個(gè)階段:道路施工階段和道路運(yùn)營(yíng)階段,道路施工階段主要保證道路施工的安全進(jìn)行,而道路運(yùn)營(yíng)階段主要用于評(píng)價(jià)支護(hù)結(jié)構(gòu)的穩(wěn)定性,防止支護(hù)結(jié)構(gòu)在道路運(yùn)營(yíng)期出現(xiàn)危害道路運(yùn)營(yíng)安全的情況發(fā)生。本文對(duì)國(guó)內(nèi)外相關(guān)的研究現(xiàn)狀進(jìn)行了簡(jiǎn)要的闡述,以鄭州市中原路西延快速路工程某標(biāo)段為例,主要對(duì)軟巖區(qū)域道路施工中挖方支護(hù)段的邊坡支護(hù)結(jié)構(gòu)穩(wěn)定性進(jìn)行研究,采用現(xiàn)場(chǎng)實(shí)測(cè)和有限元軟件(MIDAS軟件)對(duì)比的方式,對(duì)支護(hù)結(jié)構(gòu)在施工期的變形情況進(jìn)行了綜合分析。本文的主要研究?jī)?nèi)容如下:(1)基于該區(qū)域的地質(zhì)勘察,對(duì)該施工段的挖方影響區(qū)域風(fēng)險(xiǎn)及變形情況進(jìn)行了簡(jiǎn)要的分析,依據(jù)道路施工設(shè)計(jì)、工程測(cè)量規(guī)范和相關(guān)工程實(shí)例科學(xué)合理地制定了現(xiàn)場(chǎng)實(shí)測(cè)方案。(2)通過(guò)對(duì)現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)的分析可知,挖方區(qū)域在道路邊坡支護(hù)施工期間變形較大,隨著施工結(jié)束變形逐漸區(qū)域穩(wěn)定,說(shuō)明邊坡支護(hù)結(jié)構(gòu)切實(shí)起到了對(duì)該區(qū)域軟巖的加固作用,有效阻止了軟巖變形對(duì)道路施工的影響,進(jìn)而保證了道路運(yùn)營(yíng)期間的安全。(3)通過(guò)有限元(MIDAS)軟件采用強(qiáng)度折減法,結(jié)合地質(zhì)和挖方情況對(duì)該區(qū)域在支護(hù)施工階段的變形情況進(jìn)行模擬,得出了邊坡變形的變化規(guī)律,邊坡變形最大位置出現(xiàn)在坡腳或兩級(jí)邊坡交界處,這與現(xiàn)場(chǎng)實(shí)測(cè)結(jié)果基本吻合,對(duì)現(xiàn)場(chǎng)實(shí)測(cè)工作具有指導(dǎo)性作用。(4)采用有限元模擬和現(xiàn)場(chǎng)實(shí)測(cè)相結(jié)合的方式,切實(shí)做到了優(yōu)化道路設(shè)計(jì)和施工方案,大大降低了軟巖區(qū)域施工的風(fēng)險(xiǎn),保證了道路施工安全,為以后類似工程的施工、設(shè)計(jì)和監(jiān)測(cè)方案的確定提供了依據(jù)。
[Abstract]:With the development of economy and technology and the progress of society, the living standard of the people has been improved constantly, and the construction of infrastructure such as transportation has been greatly developed. However, China has a vast territory and complex landforms, which puts forward higher requirements for the construction of transportation facilities, especially in complex soft rock areas. In order to ensure the safety of the road, it is necessary to take appropriate reinforcement measures to the excavator or fill area within the impact area of the road construction area, so as to prevent the road construction and operation process. An engineering accident or traffic accident caused by poor geology. Although the reinforcement techniques for excavating and filling areas are relatively mature at present, due to the influence of comprehensive factors such as geology and climate, different regions need different reinforcement forms. In order to ensure the stability of reinforcement and support structure during road construction, the deformation observation of the structure in this area is needed in order to grasp the slope stability dynamics at any time. The deformation observation is mainly divided into two stages: road construction stage and road operation stage, the road construction stage mainly guarantees the safety of road construction, and the road operation stage is mainly used to evaluate the stability of supporting structure. To prevent the supporting structure from endangering the road operation safety during the road operation period. In this paper, the current situation of research at home and abroad is briefly described. Taking a certain section of Zhongyuan Road West extension Expressway Project in Zhengzhou City as an example, the stability of slope support structure of excavated support section in soft rock area is studied. The deformation of supporting structure during construction is analyzed synthetically by the comparison of field measurement and finite element software (MIDAS software). The main contents of this paper are as follows: (1) based on the geological survey of the region, the risk and deformation of the construction section affected by the excavations are analyzed briefly, and the road construction design is given. The engineering survey code and relevant engineering examples have scientifically and reasonably worked out the field measurement plan. (2) through the analysis of the field measured data, it can be seen that the excavated area has a large deformation during the construction of the road slope support. With the end of the construction deformation gradually stable in the region, it shows that the slope support structure has played a role in strengthening the soft rock in this area, and effectively prevented the soft rock deformation from affecting the road construction. Then the safety of the road operation period is ensured. (3) through the finite element (MIDAS) software, the strength reduction method is used to simulate the deformation of the area in the supporting construction stage combined with the geological and excavating conditions, and the variation law of the slope deformation is obtained. The maximum deformation of the slope occurs at the foot of the slope or at the junction of the two-grade slope, which is basically consistent with the field measurement results, which is instructive to the field measurement work. (4) the combination of finite element simulation and field measurement is adopted. It can effectively optimize the road design and construction scheme, greatly reduce the risk of construction in soft rock area, ensure the safety of road construction, and provide the basis for the construction, design and monitoring scheme of similar projects in the future.
【學(xué)位授予單位】：河南工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U416.13

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本文編號(hào)：2195347