Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pile foundation construction method for easily-collapsed thick covering layer opening karst cave geology
The invention relates to a pile foundation construction method for easily-collapsed thick covering layer opening karst cave geology, and relates to the field of pile foundation construction. The pilefoundation construction method comprises the steps that firstly, a karst cave is subjected to mud jacking reinforcement, a bored pile casing is buried in each pile position, holes are led to a first preset position below a bed rock surface, and when a first section of protective steel casing is lowered to a second preset position along the bored pile casings, the first section of protective steelcasing is fixed to the bored pile casings; and finally, the protective steel casing to be installed is connected with the previous section of installed protective steel casing, after installation is finished, the previous section of protective steel casing is separated from the bored pile casings, the section of protective steel casing is lowered, when the section of protective steel casing is lowered to the second preset position, the section of protective steel casing is connected with the bored pile casings, and circulation is conducted in sequence until the first section of protective steel casing is lowered into a rock stratum. The pile foundation construction method provided by the invention solves the problems that ground surface collapse, drill bit burying, steel casing sinking andthe like are easily caused by pile foundation construction in a karst cave geological environment of an easily-collapsed thick covering layer.
本申请涉及一种用于易塌陷厚覆盖层开口溶洞地质的桩基施工方法，涉及桩基施工领域。本方法首先对溶洞进行压浆加固，在每一桩位上均埋设钻孔桩护筒，引孔至基岩面下方的第一预设位置处，将首节防护钢护筒沿钻孔桩护筒下放至第二预设位置时，将其与钻孔桩护筒固定，最后将待安装的防护钢护筒与已安装的上一节防护钢护筒相连，在安装结束后，将上一节防护钢护筒与钻孔桩护筒分离，并对本节防护钢护筒进行下放，下放至第二预设位置时将本节防护钢护筒与钻孔桩护筒连接，依次循环，直至首节防护钢护筒下放至岩层内。本申请提供的桩基施工方法，解决了在易塌陷厚覆盖层的溶洞地质环境中进行桩基施工容易引发地表塌陷、钻头被埋、钢护筒下沉等问题。
Pile foundation construction method for easily-collapsed thick covering layer opening karst cave geology
The invention relates to a pile foundation construction method for easily-collapsed thick covering layer opening karst cave geology, and relates to the field of pile foundation construction. The pilefoundation construction method comprises the steps that firstly, a karst cave is subjected to mud jacking reinforcement, a bored pile casing is buried in each pile position, holes are led to a first preset position below a bed rock surface, and when a first section of protective steel casing is lowered to a second preset position along the bored pile casings, the first section of protective steelcasing is fixed to the bored pile casings; and finally, the protective steel casing to be installed is connected with the previous section of installed protective steel casing, after installation is finished, the previous section of protective steel casing is separated from the bored pile casings, the section of protective steel casing is lowered, when the section of protective steel casing is lowered to the second preset position, the section of protective steel casing is connected with the bored pile casings, and circulation is conducted in sequence until the first section of protective steel casing is lowered into a rock stratum. The pile foundation construction method provided by the invention solves the problems that ground surface collapse, drill bit burying, steel casing sinking andthe like are easily caused by pile foundation construction in a karst cave geological environment of an easily-collapsed thick covering layer.
本申请涉及一种用于易塌陷厚覆盖层开口溶洞地质的桩基施工方法，涉及桩基施工领域。本方法首先对溶洞进行压浆加固，在每一桩位上均埋设钻孔桩护筒，引孔至基岩面下方的第一预设位置处，将首节防护钢护筒沿钻孔桩护筒下放至第二预设位置时，将其与钻孔桩护筒固定，最后将待安装的防护钢护筒与已安装的上一节防护钢护筒相连，在安装结束后，将上一节防护钢护筒与钻孔桩护筒分离，并对本节防护钢护筒进行下放，下放至第二预设位置时将本节防护钢护筒与钻孔桩护筒连接，依次循环，直至首节防护钢护筒下放至岩层内。本申请提供的桩基施工方法，解决了在易塌陷厚覆盖层的溶洞地质环境中进行桩基施工容易引发地表塌陷、钻头被埋、钢护筒下沉等问题。
Pile foundation construction method for easily-collapsed thick covering layer opening karst cave geology
一种用于易塌陷厚覆盖层开口溶洞地质的桩基施工方法
YIN ZHENJUN (Autor:in) / AN DONGHANG (Autor:in) / FU HAO (Autor:in) / LI HONGRUI (Autor:in) / GUO JIAJIA (Autor:in) / TANG YUNCHUAN (Autor:in) / YANG YUCHENG (Autor:in) / FENG ZHIJIE (Autor:in) / YAN JIE (Autor:in) / HUANG MINGLIANG (Autor:in)
19.03.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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