Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for stacked tunnel shield to safely pass through existing bridge pile invaded tunnel area
The invention discloses a construction method for a stacked tunnel shield to safely pass through an existing bridge pile invaded tunnel area, and belongs to the technical field of geotechnical engineering construction.The construction method comprises the following steps that the specific position of an underpinning pile is planned, and the plane contour of an underpinning girder is determined; the specific size and number of the underpinning girders and the underpinning piles are calculated, and the underpinning piles are driven; the foundation pit is excavated in two stages, in the first stage, the foundation pit is excavated to the bottom of the underpinning girder, the underpinning girder is constructed, and the underpinning girder is arranged at the top of the underpinning pile; in the second stage, digging is conducted to the position below the underpinning pile, and the load borne by the old pile is transferred to the underpinning pile; the old pile is cut off below the underpinning girder, and the foundation pit is backfilled; and the shield intrudes into the tunnel area through the existing bridge piles after twice pile grinding in the stacked tunnel. The method comprises the following steps: firstly, erecting a temporary support structure on the ground to control settlement and horizontal displacement of piers; the foundation pit is excavated in two stages after the underpinning pile is driven, and the old pile is cut off after excavation, so that the influence on the underpinning pile foundation in the two-time pile abrasion breaking process of the stacked tunnel is reduced.
本发明公开了一种叠落隧道盾构安全穿越既有桥桩侵入隧道区施工方法，属于岩土工程施工技术领域，包括以下步骤：规划托换桩的具体位置，确定托换大梁的平面轮廓；计算托换大梁及托换桩的具体尺寸及数量，并打设托换桩；开挖基坑，基坑分两阶段开挖，第一阶段挖至托换大梁位置的底部，施工托换大梁，托换大梁置于托换桩顶部；第二阶段挖至托换桩的下方，将旧桩承受荷载转移至托换桩；在托换大梁下方截断旧桩，回填基坑；盾构在叠落隧道中两次磨桩通过既有桥桩侵入隧道区。该方法首先在地面架设临时支撑结构，控制桥墩的沉降及水平位移；托换桩打设后两阶段开挖基坑，开挖后将旧桩截断，从而降低叠落隧道两次磨断桩过程中对托换桩基的影响。
Construction method for stacked tunnel shield to safely pass through existing bridge pile invaded tunnel area
The invention discloses a construction method for a stacked tunnel shield to safely pass through an existing bridge pile invaded tunnel area, and belongs to the technical field of geotechnical engineering construction.The construction method comprises the following steps that the specific position of an underpinning pile is planned, and the plane contour of an underpinning girder is determined; the specific size and number of the underpinning girders and the underpinning piles are calculated, and the underpinning piles are driven; the foundation pit is excavated in two stages, in the first stage, the foundation pit is excavated to the bottom of the underpinning girder, the underpinning girder is constructed, and the underpinning girder is arranged at the top of the underpinning pile; in the second stage, digging is conducted to the position below the underpinning pile, and the load borne by the old pile is transferred to the underpinning pile; the old pile is cut off below the underpinning girder, and the foundation pit is backfilled; and the shield intrudes into the tunnel area through the existing bridge piles after twice pile grinding in the stacked tunnel. The method comprises the following steps: firstly, erecting a temporary support structure on the ground to control settlement and horizontal displacement of piers; the foundation pit is excavated in two stages after the underpinning pile is driven, and the old pile is cut off after excavation, so that the influence on the underpinning pile foundation in the two-time pile abrasion breaking process of the stacked tunnel is reduced.
本发明公开了一种叠落隧道盾构安全穿越既有桥桩侵入隧道区施工方法，属于岩土工程施工技术领域，包括以下步骤：规划托换桩的具体位置，确定托换大梁的平面轮廓；计算托换大梁及托换桩的具体尺寸及数量，并打设托换桩；开挖基坑，基坑分两阶段开挖，第一阶段挖至托换大梁位置的底部，施工托换大梁，托换大梁置于托换桩顶部；第二阶段挖至托换桩的下方，将旧桩承受荷载转移至托换桩；在托换大梁下方截断旧桩，回填基坑；盾构在叠落隧道中两次磨桩通过既有桥桩侵入隧道区。该方法首先在地面架设临时支撑结构，控制桥墩的沉降及水平位移；托换桩打设后两阶段开挖基坑，开挖后将旧桩截断，从而降低叠落隧道两次磨断桩过程中对托换桩基的影响。
Construction method for stacked tunnel shield to safely pass through existing bridge pile invaded tunnel area
一种叠落隧道盾构安全穿越既有桥桩侵入隧道区施工方法
DING WANTAO (Autor:in) / WEN YIRAN (Autor:in) / CAO KAI (Autor:in) / LI ZHENYU (Autor:in) / BAI LIN (Autor:in) / WANG QINGLI (Autor:in) / LIU YUTING (Autor:in) / TANG ZHIHUI (Autor:in) / RUAN HANG (Autor:in) / ZHANG LIANCAI (Autor:in)
04.04.2023
Patent
Elektronische Ressource
Chinesisch
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