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A platform for research: civil engineering, architecture and urbanism
Karst bridge pile foundation construction method
The invention provides a karst bridge pile foundation construction method which comprises a karst pile foundation drilling step and specifically comprises the following steps: (1) covering layer drilling: adopting clay slurry wall protection and small-stroke drilling of a plain fill stratum; when entering and penetrating through a silty clay layer, drilling by adopting clay slurry wall protection and small stroke; when a sand layer with the thickness smaller than 2m is drilled, drilling is performed by adopting a cement slurry retaining wall and a small stroke; when a sludge layer with the thickness smaller than 2 m is drilled, 1: 1 rubble clay is adopted for backfilling treatment; (2) rock stratum drilling is conducted, specifically, in a closed karst cave or a communicated karst cave with the height larger than 3 m, a steel casing is adopted to follow up; according to the method, karst pile foundation construction is conducted on the karst basin, and the occurrence probability of inclined holes, drill burying, drill jamming, drill falling and collapse of the karst pile foundation can be greatly reduced.
本发明提供一种岩溶桥梁桩基施工方法，该施工方法包括岩溶桩基钻进步骤，具体为：(1)覆盖层钻进：采取黏土泥浆护壁+小冲程钻进素填土层；在进入和穿过粉质黏土层时，采取黏土泥浆护壁+小冲程进行钻进；厚度小于2m的砂层钻进时，采取水泥泥浆护壁+小冲程进行钻进；厚小于2m的淤泥层钻进时，采取1:1片石黏土回填处理；(2)岩层钻进：在高度大于3m的封闭型溶洞或连通型溶洞，采用钢护筒跟进。采用本发明方法在岩溶盆地进行岩溶桩基施工，可大大降低了岩溶桩基斜孔、埋钻、卡钻、掉钻、塌陷出现的概率。
Karst bridge pile foundation construction method
The invention provides a karst bridge pile foundation construction method which comprises a karst pile foundation drilling step and specifically comprises the following steps: (1) covering layer drilling: adopting clay slurry wall protection and small-stroke drilling of a plain fill stratum; when entering and penetrating through a silty clay layer, drilling by adopting clay slurry wall protection and small stroke; when a sand layer with the thickness smaller than 2m is drilled, drilling is performed by adopting a cement slurry retaining wall and a small stroke; when a sludge layer with the thickness smaller than 2 m is drilled, 1: 1 rubble clay is adopted for backfilling treatment; (2) rock stratum drilling is conducted, specifically, in a closed karst cave or a communicated karst cave with the height larger than 3 m, a steel casing is adopted to follow up; according to the method, karst pile foundation construction is conducted on the karst basin, and the occurrence probability of inclined holes, drill burying, drill jamming, drill falling and collapse of the karst pile foundation can be greatly reduced.
本发明提供一种岩溶桥梁桩基施工方法，该施工方法包括岩溶桩基钻进步骤，具体为：(1)覆盖层钻进：采取黏土泥浆护壁+小冲程钻进素填土层；在进入和穿过粉质黏土层时，采取黏土泥浆护壁+小冲程进行钻进；厚度小于2m的砂层钻进时，采取水泥泥浆护壁+小冲程进行钻进；厚小于2m的淤泥层钻进时，采取1:1片石黏土回填处理；(2)岩层钻进：在高度大于3m的封闭型溶洞或连通型溶洞，采用钢护筒跟进。采用本发明方法在岩溶盆地进行岩溶桩基施工，可大大降低了岩溶桩基斜孔、埋钻、卡钻、掉钻、塌陷出现的概率。
Karst bridge pile foundation construction method
一种岩溶桥梁桩基施工方法
HUI XIAOJUN (author) / LIU XIAOLIANG (author) / CHEN XIUWEN (author) / LIN XINBING (author) / CAO FENGBIN (author) / ZHANG YU (author) / ZHAO ERHUA (author) / ZHANG TAO (author)
2023-12-05
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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