【摘要】：該機(jī)場(chǎng)為高填方機(jī)場(chǎng),在機(jī)場(chǎng)回填結(jié)束后該機(jī)場(chǎng)4、5標(biāo)段填方邊坡土面區(qū)和道槽區(qū)產(chǎn)生裂縫變形,依據(jù)監(jiān)測(cè)單位所提供的監(jiān)測(cè)資料,該區(qū)域變形尚未穩(wěn)定,收斂趨勢(shì)不明顯。4、5標(biāo)段該邊坡的變形目前并可能對(duì)邊坡上部填方區(qū)及上方跑道區(qū)穩(wěn)定性構(gòu)成影響,從而威脅該區(qū)邊坡整體穩(wěn)定,進(jìn)一步影響道槽安全,威脅飛機(jī)起降。該項(xiàng)目目的便是為查清該段邊坡變形形成的成因,變形特征,為處理該區(qū)域變形提供依據(jù)。該填方體變形范圍最遠(yuǎn)以跑道地面裂縫為界,前緣根據(jù)前期變形監(jiān)測(cè)資料顯示主要在邊坡反壓平臺(tái)上部,兩側(cè)變形不明顯,.無(wú)明顯側(cè)向剪切裂縫,斜坡總體在平面上近似于圈椅狀(冰斗形)展布。主要有變形范圍整體順坡長(zhǎng)約200m,寬約400m,平均厚約25m,坡面斜坡形態(tài)從高到低呈上陡下緩的形態(tài),剖面上呈折線形地形。該邊坡于2012年4月14日開(kāi)始填筑,2012年12月填筑至1952m時(shí)(設(shè)計(jì)標(biāo)高為1964m),反壓平臺(tái)內(nèi)側(cè)坡面上發(fā)生了較大位移,平臺(tái)內(nèi)側(cè)排水溝等破壞較多,之后,在反壓平臺(tái)外側(cè)增加寬25m、厚30m的土層平臺(tái),反壓平臺(tái)上部增加厚20m的土層進(jìn)行反壓,反壓處理后再于2013年4月中旬進(jìn)行坡頂填筑,2013年5月底填筑至設(shè)計(jì)標(biāo)高,后期填筑高度約12m。反壓處理后坡面變形明顯收斂,變形區(qū)域平緩,增設(shè)反壓平臺(tái)起到了較好的壓腳作用。通過(guò)對(duì)變形邊坡應(yīng)急勘查和深部位移監(jiān)測(cè)和地面位移監(jiān)測(cè)數(shù)據(jù),提出了對(duì)該高填方變形邊坡坡采取抗滑樁+增設(shè)反壓平臺(tái)的治理措施建議,通過(guò)抗滑樁+土層反壓治理,邊坡變形得到遏制,處于基本穩(wěn)定狀態(tài)。本論文對(duì)該高填方變形邊坡的發(fā)育特征、影響條件及機(jī)制成因等開(kāi)展了分析,并對(duì)該變形邊坡的穩(wěn)定性采取了定量的計(jì)算。
[Abstract]:The airport is a high-fill airport. After the backfilling of the airport, crack deformation occurs in the soil surface area and channel area of the fill slope of the airport's No. 4 / 5 section. According to the monitoring data provided by the monitoring unit, the deformation in this area has not been stabilized. The convergent trend of the slope is not obvious. The deformation of the slope at present may affect the stability of the upper filling area and the upper runway area of the slope, thus threatening the overall stability of the slope, further affecting the safety of the channel and threatening the take-off and landing of the aircraft. The purpose of this project is to find out the causes and characteristics of the deformation of the slope, and to provide the basis for dealing with the deformation in the region. The deformation range of the fill is furthest bounded by the cracks on the ground of the runway, and the front edge is mainly on the upper part of the backpressure platform of the slope according to the monitoring data of the previous deformation, and the deformation on both sides is not obvious. There is no obvious lateral shear fracture, and the slope is generally similar to the ring chair (ice bucket) distribution on the plane. The main deformation ranges are about 200m in length, 400m in width and 25m in average thickness. The slope shape of slope is steep and gentle from high to low, and the profile is zigzag. The slope began to be filled on April 14, 2012. When the slope was filled to 1952m in December 2012 (the design elevation was 1964m), a large displacement occurred on the inner slope of the backpressure platform, and more damage was caused to the inner drainage ditch of the platform. The soil layer with a width of 25m and a thickness of 30m is added outside the backpressure platform, and the soil layer with a thickness of 20m is added in the upper part of the backpressure platform, and then the top of the slope is filled in the middle of April 2013. The height is about 12m at the end of May 2013 and the height of the soil layer is about 12m at the end of May 2013. After backpressure treatment, the slope deformation converges obviously, the deformation area is smooth, and the addition of backpressure platform plays a better role in pressing foot. Based on the data of emergency survey, deep displacement monitoring and ground displacement monitoring of the deformation slope, the paper puts forward some measures to control the slope with the high filling deformation, and puts forward some measures to control the slope with anti-slide pile and the anti-slide pile soil layer by the anti-slide pile soil anti-pressure treatment. The slope deformation is restrained and is in a stable state. In this paper, the development characteristics, influencing conditions and mechanism of the high fill deformation slope are analyzed, and the stability of the deformation slope is calculated quantitatively.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：V351.1;TU43

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本文編號(hào)：2209885