雙排樁支護(hù)結(jié)構(gòu)土壓力數(shù)值模擬研究-文庫吧資料
2025-06-29 22:40本頁面
【正文】 力值，在基坑開挖面以下其值大于靜止土壓力值。因此，在雙排樁支護(hù)結(jié)構(gòu)內(nèi)力計(jì)算時(shí)，建議前排樁樁前被動(dòng)土壓力取被動(dòng)土壓力值。2 土壓力分析 前排樁樁前被動(dòng)土壓力前排樁樁前被動(dòng)土壓力如圖1所示?；娱_挖土體采用零模型（Null），零模型區(qū)域的應(yīng)力被設(shè)置為零，在FLAC3D可以很好地進(jìn)行開挖、回填之類的模擬[7]?！〔牧媳緲?gòu)模型混凝土方樁及連梁采用各向同性彈性模型，該模型在FLAC3D中需要輸入體積模量K、剪切模量G等參數(shù)；土體采用摩爾—庫侖模型，該模型在FLAC3D中需要輸入K、G、c、φ等參數(shù)。樁的截面尺寸為bh= m m，E=104 MPa，μ=，樁的密度ρ為2500 kg/m3；樁頂連梁截面尺寸bh= m m， m，模型計(jì)算參數(shù)取值與混凝土樁一致，連梁與前后排樁節(jié)點(diǎn)采用剛結(jié)連接。采用雙排樁支護(hù)結(jié)構(gòu)支護(hù)，前后兩排樁樁長相等均為18 m，嵌固深度均為10 m， m，（ m）?！」こ谈艣r該基坑長50 m，寬24 m，基坑開挖深度8 m，分兩次開挖，第一次開挖3 m，第二次開挖至基坑設(shè)計(jì)標(biāo)高。（4）為了與實(shí)際相一致，樁底不加任何約束條件，自然嵌固。（2）土體為單一土層，且均質(zhì)、連續(xù)。筆者利用巖土工程分析軟件FLAC3D建立三維雙排樁有限元模型，對雙排樁所受土壓力進(jìn)行了分析。目前，對雙排樁的研究一般多集中在對樁頂側(cè)移、樁身內(nèi)力方面[26]，很少有文獻(xiàn)研究雙排樁土壓力的分布。高層建筑的蓬勃發(fā)展，使深基坑支護(hù)新技術(shù)不斷涌現(xiàn)，雙排支護(hù)柱形式便是其中之一。 the soil pressure before rear row pile was roughly linear distribution and consistent with the static soil pressure , upward of the excavation of foundation ditch was less than the static soil pressure, underside of the excavation of foundation ditch was greater than the static soil pressure。 2. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China)Abstract: Doublerow pile supporting structure is a new form of deep foundation ditch support, in this design, the correctness of the value of soil pressure on the pile plays a critical role in supporting system design, in order to more accurately to design this structure,we must know about the soil pressure distribution of the doublerow pile, this paper using the general international geotechnical engineering analysis software FLAC3D ,through numerical simulation methods, study soil pressure distribution of the doublerow pile, e to the conclu
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