铁道建筑
鐵道建築
철도건축
RAILWAY ENGINEERING
2013年
11期
102-105
,共4页
自平衡试桩法%南水北调%渡槽%桩基检测%桩基承载力
自平衡試樁法%南水北調%渡槽%樁基檢測%樁基承載力
자평형시장법%남수북조%도조%장기검측%장기승재력
Self-balanced loading method%South-Water-to-North project%Aqueduct%Pile foundation inspection%Bearing capacity of the pile foundation
南水北调中线总干渠与青兰高速连接线交叉工程中，采用渡槽跨越青兰高速连接线。渡槽槽身为分离式扶壁梯形渡槽，渡槽下部支承结构由实体板墩、承台和桩基础三部分组成。本文结合该工程2根试桩自平衡试验结果，通过分析单桩极限承载力、桩身轴力、土层摩阻力等技术参数，对桩基础承载特性进行了研究，并探讨了施工工艺对桩基础承载性能的影响。试验结果表明桩基承载力均高于设计要求，其中干挖作业法因沉渣较少，桩基承载力相对得到了提高，在类似工程中推荐采用。
南水北調中線總榦渠與青蘭高速連接線交扠工程中，採用渡槽跨越青蘭高速連接線。渡槽槽身為分離式扶壁梯形渡槽，渡槽下部支承結構由實體闆墩、承檯和樁基礎三部分組成。本文結閤該工程2根試樁自平衡試驗結果，通過分析單樁極限承載力、樁身軸力、土層摩阻力等技術參數，對樁基礎承載特性進行瞭研究，併探討瞭施工工藝對樁基礎承載性能的影響。試驗結果錶明樁基承載力均高于設計要求，其中榦挖作業法因沉渣較少，樁基承載力相對得到瞭提高，在類似工程中推薦採用。
남수북조중선총간거여청란고속련접선교차공정중，채용도조과월청란고속련접선。도조조신위분리식부벽제형도조，도조하부지승결구유실체판돈、승태화장기출삼부분조성。본문결합해공정2근시장자평형시험결과，통과분석단장겁한승재력、장신축력、토층마조력등기술삼수，대장기출승재특성진행료연구，병탐토료시공공예대장기출승재성능적영향。시험결과표명장기승재력균고우설계요구，기중간알작업법인침사교소，장기승재력상대득도료제고，재유사공정중추천채용。
Aqueduct crossing was applied in the transposition project,which connects the main canal in the centerline of the South Water to North project and the Qinglan expressway. The aqueduct itself takes the separated counterfort trapezoid structure and the lower supporting structure is made of slab pier, bearing platform and pile foundation. The paper takes reference from the self-balanced experiment result of the two trail piles and conducted study on the bearing performance of the pile foundation with the help of some technical parameters,like the ultimate bearing capacity of single pile,axial force of the pile and friction force of the soil layer. At the same time,it discusses the influence of the technology process on the bearing performance of the pile foundation. The results indicates that the bearing performance exceeds the designing requirements and dry digging operation method should be recommended in future construction,as the limited sediment greatly improved the bearing performance.
