裝配式鋼筋混凝土管型通道現(xiàn)場(chǎng)試驗(yàn)及數(shù)值模擬研究

1、裝配式鋼筋混凝土管型通道現(xiàn)場(chǎng)試驗(yàn)及數(shù)值模擬研究        【中文摘要】裝配式鋼筋混凝土管型通道作為一種新的地下通道結(jié)構(gòu)型式,具有工程質(zhì)量易于控制、施工速度快和本錢造價(jià)低等優(yōu)點(diǎn)。可以在預(yù)制工廠及場(chǎng)地批量預(yù)制,然后運(yùn)輸?shù)浆F(xiàn)場(chǎng)安裝即可。具有較為廣泛的應(yīng)用遠(yuǎn)景,安徽省將在六(安)武(漢)高速公路和泗(縣)宿(州)高速公路等工程中推廣應(yīng)用。而國(guó)內(nèi)對(duì)多管片裝配式地下通道結(jié)構(gòu)應(yīng)用技術(shù)的研究尚為空缺,還沒(méi)有裝配式鋼筋混凝土管型通道的設(shè)計(jì)規(guī)范可供設(shè)計(jì)職員參考。當(dāng)前可鑒戒的工程經(jīng)驗(yàn)較少,設(shè)計(jì)和施工方法還處于摸索階段。本文結(jié)合安徽省

2、交通廳批準(zhǔn)立項(xiàng)的六(安)武(漢)高速公路裝配式大孔徑鋼筋混凝土管型通道關(guān)鍵技術(shù)研究課題以及安徽省交通投資團(tuán)體研究項(xiàng)目淺埋裝配式鋼筋混凝土管型通道力學(xué)特性研究,采用現(xiàn)場(chǎng)試驗(yàn)、理論分析和數(shù)值模擬分析計(jì)算相結(jié)合的方法,對(duì)裝配式鋼筋混凝土管型通道的力學(xué)性能、抗震設(shè)計(jì)方法及施工工藝進(jìn)行了系統(tǒng)而深進(jìn)的研究,本文的主要研究?jī)?nèi)容如下:(1)對(duì)裝配式鋼筋混凝土管型通道的動(dòng)態(tài)施工過(guò)程進(jìn)行了監(jiān)控,基于現(xiàn)場(chǎng)試驗(yàn)實(shí)測(cè)數(shù)據(jù),研究了裝配式鋼筋混凝土管型通道在施工過(guò)程中土壓力、變形、應(yīng)力及基礎(chǔ)沉降等的分布與發(fā)展規(guī)律。(2)以大型通用有限元程序ANSYS為平臺(tái),提出了裝配式鋼筋混凝土管型通道的三維實(shí)體-接觸計(jì)算模型,運(yùn)用“單元

3、生死”功能模擬裝配式管型通道的吊裝、回填施工全過(guò)程。利用該模型分析了六(安)武(漢)高速公路上一座裝配式管型通道施工過(guò)程的變形及應(yīng)力分布情況,計(jì)算結(jié)果與現(xiàn)場(chǎng)試驗(yàn)實(shí)測(cè)值進(jìn)行了比較,證實(shí)了本文計(jì)算模型和計(jì)算結(jié)果的公道性。(3)建立了某裝配式鋼筋混凝土斜交管型通道的空間有限元數(shù)值模型,模擬分析了裝配式斜交管型通道在車輛荷載作用下,不同斜交角時(shí)管型通道的變形大小,應(yīng)力大小及應(yīng)力分布情況。(4)以安徽省泗(縣)宿(州)高速公路工程的某裝配式鋼筋混凝土管型通道為研究對(duì)象,考慮土與結(jié)構(gòu)的相互作用及管片接頭之間的擠壓摩擦作用,采用有限元數(shù)值模擬技術(shù)建立了該管型通道的二維有限元模型,分析研究了裝配式鋼筋混凝土管

4、型通道管片接頭斷開位置確定、汽車荷載最不利布載位置確定等關(guān)鍵性題目。建立了該裝配式管型通道的三維-接觸有限元模型,計(jì)算了其應(yīng)力大小及應(yīng)力分布情況,并與二維有限元模型計(jì)算的結(jié)果進(jìn)行了對(duì)比,計(jì)算分析表明二維有限元模型的計(jì)算結(jié)果與三維有限元的計(jì)算結(jié)果差別較小。(5)在土體截?cái)噙吔缣幨┘诱硰椥匀斯み吔?建立了泗(縣)宿(州)高速公路工程的某裝配式鋼筋混凝土管型通道的動(dòng)力分析模型,采用時(shí)程分析方法,對(duì)其進(jìn)行了非線性地震反應(yīng)分析。研究了在靜力荷載與水平向地震動(dòng)荷載共同作用下裝配式鋼筋混凝土管型通道的水平向位移和內(nèi)力反應(yīng)的規(guī)律。(6)根據(jù)國(guó)內(nèi)外涵洞和地下通道結(jié)構(gòu)在公路和鐵路上的施工經(jīng)驗(yàn),并結(jié)合六(安)武(漢

5、)高速公路工程安徽段的裝配式鋼筋混凝土管型通道施工實(shí)踐,分析總結(jié)出適用于我國(guó)裝配式鋼筋混凝土管型通道的施工工藝,并提出了相應(yīng)的施工要求。');【Abstract】 As a new underground culvert structure, the prefabricated reinforced concrete culvert with the advantages of being easy-control the project quality, construction speed and low cost has the widespread application va

6、lue and prospect. It can be bulk prefabricated in the factory and transported to the site to install. Anhui province will push the application of the prefabricated reinforced concrete culvert to the Liu(an) Wu(han) expressway and Si(xian)Su(zhou) expressway and other projects.Whereas the domestic re

7、search on the application technology of segmental prefabricated underground culvert is still blank and there is no design specification to offer for the reference. With the inadequate working experience, design and construction methods are just on the initial stage.Combined with the subject that app

8、roved by Anhui Provincial Communications department and Anhui Traffic Investment Groups research project , this * uses in-situ test, theoretic analysis and numerical stimulation to do a deep systematic research on the mechanical properties, seismic design and construction process of prefabricated re

9、inforced concrete culvert. The main research work containing some aspects are as following:(1) To monitor the dynamic construction process of the prefabricated reinforced concrete culvert. Based on the in-situ field measured data, this * makes a thorough study of the earth pressure, deformation, str

10、ess and foundation settlement distribution and development law of prefabricated reinforced concrete culvert in the phrases of constructing.(2) Using the large universal finite element program ANSYS as the platform, this * presents a three dimensional solid contact calculation model of the prefabrica

11、ted reinforced concrete culvert and simulates the entire process of hoisting and backfilling of prefabricated culvert by the application of“element birth and death”. Using the model to analyze the deformation and stress distribution of a prefabricated culvert of Liu(an)Wu(han) expressway and compari

12、ng the calculation results and field measurement record, this * verifies the accurate and feasibility of the model and result.(3) A space finite element model of skew prefabricated reinforced concrete culvert is established. Skew prefabricated reinforced concrete culvert loaded under the vehicles, t

13、he deformation size of different skew culvert and the stress size and the distribution of stress have been analyzed in this *.(4) Based on the research of a prefabricated reinforced concrete culvert of Anhui Si(xian)Su(zhou) expressway and considered the priciple of soil-struction interaction and th

14、e friction and extrusion between segment joints, this * discusses and studies the key issues relating to the location of splitting point of segment joint and the bad position for the location of loaded vehicles by using finite element numerical simulation technology to establish a two-dimensional fi

15、nite element model for the culvet.A three dimensional solid contact calculation model of the culvet is established to calculate the size and the distribution of its stress. Comparing with the results calculated by the two-dimensional finite element and the result of three dimentional, it shows that

16、the two results are nearly the same.(5) Imposing viscous spring artificial boundary in the boundary of the soil to set up a dynamic analysis model for a prefabricated reinforced concrete culvert in Si(xian)Su(zhou) expressway project and using the time-history analysis method, this * makes a thoroug

17、h study on its nonliner seismic response and studys the law of horizantal displacement and internal force of the prefabricated reinforced concrete culvert under the coaction of static load and horizontally seizimic loading.(6) Combined with the road and railway constuction experience of domestic and foreign culverts and underground passages structures and the prefabricated reinforced concrete culvert