Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Earth and rockfill dam foundation deep soft soil treatment method and earth and rockfill dam
The invention relates to an earth and rockfill dam foundation deep soft soil treatment method and an earth and rockfill dam. The earth and rockfill dam foundation deep soft soil treatment method comprises the steps that a dam foundation excavation face is determined, the whole dam foundation excavation face is in a groove shape, a groove bottom face corresponds to the part of a dam anti-seepage body and is deep below a soft soil layer, and groove walls on the upstream portion and downstream portion of the groove bottom face are slopes inclining downwards towards the groove bottom; and before dam foundation soft soil is excavated, vibro-replacement gravel pile construction is conducted on upstream and downstream foundations of the dam anti-seepage body on the upper portion, pile holes penetrate through the dam foundation excavation face, only the holes are formed above the dam foundation excavation face, gravel is not backfilled, the gravel is only backfilled below the dam foundation excavation face, and gravel piles are formed below the dam foundation excavation face. If the soft soil below the excavation face is not treated, a soft soil slope cannot be stable, and the construction difficulty is also very high; moreover, the difficulty of excavation of common deep soft soil is very high, so that the stability of an excavation slope can be ensured only after the gravel piles are firstly used for treatment, and a dam core anti-seepage body is placed on a non-soft soil foundation during excavation.
本发明涉及一种土石坝基础深厚软土处理方法及土石坝。土石坝基础深厚软土处理方法为确定坝基开挖面，该坝基开挖面整体呈槽状，槽底面对应大坝防渗体部位并深至软土层以下，槽底面上、下游的槽壁均为向槽底斜向下倾斜的边坡；在坝基软土开挖前，先在上部对在大坝防渗体部位上、下游的基础上进行振冲碎石桩施工，桩孔穿过坝基开挖面，且坝基开挖面以上只成孔不回填碎石，仅在坝基开挖面以下回填碎石，坝基开挖面以下形成碎石桩；如果开挖面下方软土不进行处理，软土边坡无法稳定，施工难度也很大；而且一般深厚软土开挖的难度很大，故先用碎石桩进行处理后，才能保证开挖边坡的稳定，具备开挖将大坝核心防渗体放在非软土基础上。
Earth and rockfill dam foundation deep soft soil treatment method and earth and rockfill dam
The invention relates to an earth and rockfill dam foundation deep soft soil treatment method and an earth and rockfill dam. The earth and rockfill dam foundation deep soft soil treatment method comprises the steps that a dam foundation excavation face is determined, the whole dam foundation excavation face is in a groove shape, a groove bottom face corresponds to the part of a dam anti-seepage body and is deep below a soft soil layer, and groove walls on the upstream portion and downstream portion of the groove bottom face are slopes inclining downwards towards the groove bottom; and before dam foundation soft soil is excavated, vibro-replacement gravel pile construction is conducted on upstream and downstream foundations of the dam anti-seepage body on the upper portion, pile holes penetrate through the dam foundation excavation face, only the holes are formed above the dam foundation excavation face, gravel is not backfilled, the gravel is only backfilled below the dam foundation excavation face, and gravel piles are formed below the dam foundation excavation face. If the soft soil below the excavation face is not treated, a soft soil slope cannot be stable, and the construction difficulty is also very high; moreover, the difficulty of excavation of common deep soft soil is very high, so that the stability of an excavation slope can be ensured only after the gravel piles are firstly used for treatment, and a dam core anti-seepage body is placed on a non-soft soil foundation during excavation.
本发明涉及一种土石坝基础深厚软土处理方法及土石坝。土石坝基础深厚软土处理方法为确定坝基开挖面，该坝基开挖面整体呈槽状，槽底面对应大坝防渗体部位并深至软土层以下，槽底面上、下游的槽壁均为向槽底斜向下倾斜的边坡；在坝基软土开挖前，先在上部对在大坝防渗体部位上、下游的基础上进行振冲碎石桩施工，桩孔穿过坝基开挖面，且坝基开挖面以上只成孔不回填碎石，仅在坝基开挖面以下回填碎石，坝基开挖面以下形成碎石桩；如果开挖面下方软土不进行处理，软土边坡无法稳定，施工难度也很大；而且一般深厚软土开挖的难度很大，故先用碎石桩进行处理后，才能保证开挖边坡的稳定，具备开挖将大坝核心防渗体放在非软土基础上。
Earth and rockfill dam foundation deep soft soil treatment method and earth and rockfill dam
土石坝基础深厚软土处理方法及土石坝
WU WEIWEI (Autor:in) / XU JIANJUN (Autor:in) / ZHENG NAN (Autor:in) / SUN LAI (Autor:in) / LIU XIJUN (Autor:in) / ZHENG HUIFENG (Autor:in) / WANG DONGLIANG (Autor:in)
29.06.2021
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2021
Deformation of earth-rockfill dams : Proceedings
| TIBKAT | 1977
New Eildon earth and Rockfill dam
Engineering Index Backfile | 1950