Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Karst geology impact pore-forming construction method
The invention relates to a karst geology impact pore-forming construction method. According to the construction method, before pile foundation construction, advanced drilling treatment is conducted, apile casing is buried in a designed hole site to reach the designed depth, and the pile casing is reinforced; mud is prepared, a punch hammer of a punching drilling machine punches into a rock stratum, the mud water level is kept stable through a mud circulating system, and wall protection is conducted through the pile casing and mudstone clay filling; when the distance between the hammer and a karst cave roof is 0.8-1.2 m, a small hammer is adopted for low-stroke impact till the karst cave roof is broken through, then rubble clay is adopted for filling to form a protection wall, and the small hammer is used for low-stroke repeated impact till the karst cave roof is broken down; if the small hammer cannot break down the karst cave roof, a large hammer is used for breaking down the karst cave roof through low-stroke impact; pile holes are cleaned, geological detection is conducted, and mud drilling slag is transported outwards; a reinforcement cage is mounted and positioned, a guide pipe is installed to carry out secondary hole cleaning, mud performance is monitored, and underwater concrete is poured until the pile diameter is more than the designed elevation by one time. Through the method, safety of a pile washing-out machine and an operator and the pile forming quality of a pile foundation can be guaranteed.
本发明涉及一种岩溶地质冲击成孔施工方法。本发明在桩基施工前，进行超前钻孔处理，在设计孔位埋设护筒至设计深度，并对护筒进行加固处理；配制泥浆，通过冲孔钻机的冲锤冲进岩层，通过泥浆循环系统维持泥浆水位稳定，通过护筒、填充泥石黏土进行护壁；其中距离溶洞顶板0.8～1.2m时，采用小锤低冲程冲击至溶洞顶板击穿，再采用片石黏土填充形成护壁并用小锤低冲程反复冲击至溶洞顶板破除；若小锤无法破除溶洞顶板，则换用大锤低冲程冲击破除溶洞顶板；清理桩孔并进行地质检测，外运泥浆钻渣；钢筋笼安装定位，并安装导管进行二次清孔，监测泥浆性能，灌注水下混凝土至设计高程以上一倍桩径。本发明可保证冲桩机械和操作人员的安全以及桩基的成桩质量。
Karst geology impact pore-forming construction method
The invention relates to a karst geology impact pore-forming construction method. According to the construction method, before pile foundation construction, advanced drilling treatment is conducted, apile casing is buried in a designed hole site to reach the designed depth, and the pile casing is reinforced; mud is prepared, a punch hammer of a punching drilling machine punches into a rock stratum, the mud water level is kept stable through a mud circulating system, and wall protection is conducted through the pile casing and mudstone clay filling; when the distance between the hammer and a karst cave roof is 0.8-1.2 m, a small hammer is adopted for low-stroke impact till the karst cave roof is broken through, then rubble clay is adopted for filling to form a protection wall, and the small hammer is used for low-stroke repeated impact till the karst cave roof is broken down; if the small hammer cannot break down the karst cave roof, a large hammer is used for breaking down the karst cave roof through low-stroke impact; pile holes are cleaned, geological detection is conducted, and mud drilling slag is transported outwards; a reinforcement cage is mounted and positioned, a guide pipe is installed to carry out secondary hole cleaning, mud performance is monitored, and underwater concrete is poured until the pile diameter is more than the designed elevation by one time. Through the method, safety of a pile washing-out machine and an operator and the pile forming quality of a pile foundation can be guaranteed.
本发明涉及一种岩溶地质冲击成孔施工方法。本发明在桩基施工前，进行超前钻孔处理，在设计孔位埋设护筒至设计深度，并对护筒进行加固处理；配制泥浆，通过冲孔钻机的冲锤冲进岩层，通过泥浆循环系统维持泥浆水位稳定，通过护筒、填充泥石黏土进行护壁；其中距离溶洞顶板0.8～1.2m时，采用小锤低冲程冲击至溶洞顶板击穿，再采用片石黏土填充形成护壁并用小锤低冲程反复冲击至溶洞顶板破除；若小锤无法破除溶洞顶板，则换用大锤低冲程冲击破除溶洞顶板；清理桩孔并进行地质检测，外运泥浆钻渣；钢筋笼安装定位，并安装导管进行二次清孔，监测泥浆性能，灌注水下混凝土至设计高程以上一倍桩径。本发明可保证冲桩机械和操作人员的安全以及桩基的成桩质量。
Karst geology impact pore-forming construction method
一种岩溶地质冲击成孔施工方法
WANG XIAOXIAO (Autor:in) / ZHENG BIN (Autor:in) / ZHANG SHIGUI (Autor:in) / LIU ZHENYU (Autor:in) / GONG YINGKANG (Autor:in) / HU CHUN (Autor:in) / CAI XIAOYUN (Autor:in) / ZHANG YUEJUN (Autor:in) / DENG QIZHU (Autor:in) / LUO XIAOQI (Autor:in)
10.11.2020
Patent
Elektronische Ressource
Chinesisch
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