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Vibro-replacement stone pile and rockfill reinforced earth and rockfill dam soft foundation treatment structure and construction method
The invention provides a vibro-replacement stone pile and rockfill reinforced earth and rockfill dam soft foundation treatment structure and a construction method. The construction method comprises the steps that a vibro-replacement stone pile group is arranged on a soft covering layer to reinforce a deep soft foundation of a dam foundation; the bottom of the stone pile is located on a covering layer compact layer or weathered bed rock; an earth and rockfill dam anti-seepage system is composed of a covering layer foundation anti-seepage wall and a dam body anti-seepage body; a foundation inverted filter cushion layer is arranged at the top of the stone pile on the downstream side of the anti-seepage wall; and a dam shell rockfill body reinforced area is filled at the upper part of an upstream side stone pile and the upper part of a downstream side foundation inverted filter cushion layer of the anti-seepage wall, so that the deformation modulus of a dam material at the lower part of adam shell is improved, the settlement deformation of a dam body caused by a weak foundation is homogenized, and dam body cracking caused by differential settlement is avoided. For deep and thick weakfoundation conditions, through reasonable treatment measures and methods combining weak foundation reinforcement and dam body structure reinforcement, foundation strength, bearing capacity and deformation control meet the dam building requirement, and the important significance is achieved for an earth and rockfill dam engineering damming technology under complex conditions.
本发明提供了一种振冲碎石桩与堆石体加筋的土石坝软基处理结构与施工方法，在软弱覆盖层设置振冲碎石桩群，对坝基深厚软弱基础加固处理；碎石桩底部位于覆盖层密实层或风化基岩之上；土石坝防渗体系由覆盖层基础防渗墙和坝体防渗体构成；在防渗墙下游侧碎石桩顶部布置基础反滤垫层；在防渗墙上游侧碎石桩上部和下游侧基础反滤垫层上部填筑坝壳堆石体加筋区，以提高坝壳下部坝料变形模量和均化软弱基础引起坝体的沉降变形，避免不均匀沉降引起坝体开裂。本发明对于深厚软弱基础条件，通过合理的软弱基础加固与坝体结构加强相结合的处理措施与方法，实现基础强度、承载力与变形控制满足建坝要求，对复杂条件下土石坝工程筑坝技术具有重要意义。
Vibro-replacement stone pile and rockfill reinforced earth and rockfill dam soft foundation treatment structure and construction method
The invention provides a vibro-replacement stone pile and rockfill reinforced earth and rockfill dam soft foundation treatment structure and a construction method. The construction method comprises the steps that a vibro-replacement stone pile group is arranged on a soft covering layer to reinforce a deep soft foundation of a dam foundation; the bottom of the stone pile is located on a covering layer compact layer or weathered bed rock; an earth and rockfill dam anti-seepage system is composed of a covering layer foundation anti-seepage wall and a dam body anti-seepage body; a foundation inverted filter cushion layer is arranged at the top of the stone pile on the downstream side of the anti-seepage wall; and a dam shell rockfill body reinforced area is filled at the upper part of an upstream side stone pile and the upper part of a downstream side foundation inverted filter cushion layer of the anti-seepage wall, so that the deformation modulus of a dam material at the lower part of adam shell is improved, the settlement deformation of a dam body caused by a weak foundation is homogenized, and dam body cracking caused by differential settlement is avoided. For deep and thick weakfoundation conditions, through reasonable treatment measures and methods combining weak foundation reinforcement and dam body structure reinforcement, foundation strength, bearing capacity and deformation control meet the dam building requirement, and the important significance is achieved for an earth and rockfill dam engineering damming technology under complex conditions.
本发明提供了一种振冲碎石桩与堆石体加筋的土石坝软基处理结构与施工方法，在软弱覆盖层设置振冲碎石桩群，对坝基深厚软弱基础加固处理；碎石桩底部位于覆盖层密实层或风化基岩之上；土石坝防渗体系由覆盖层基础防渗墙和坝体防渗体构成；在防渗墙下游侧碎石桩顶部布置基础反滤垫层；在防渗墙上游侧碎石桩上部和下游侧基础反滤垫层上部填筑坝壳堆石体加筋区，以提高坝壳下部坝料变形模量和均化软弱基础引起坝体的沉降变形，避免不均匀沉降引起坝体开裂。本发明对于深厚软弱基础条件，通过合理的软弱基础加固与坝体结构加强相结合的处理措施与方法，实现基础强度、承载力与变形控制满足建坝要求，对复杂条件下土石坝工程筑坝技术具有重要意义。
Vibro-replacement stone pile and rockfill reinforced earth and rockfill dam soft foundation treatment structure and construction method
一种振冲碎石桩与堆石体加筋的土石坝软基处理结构与施工方法
ZHENG HUIFENG (author) / WU GUANYE (author) / ZHOU TINGQING (author) / WANG DONGLIANG (author) / SUN LAI (author) / CHEN YI (author)
2021-01-08
Patent
Electronic Resource
Chinese
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