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A platform for research: civil engineering, architecture and urbanism
Construction method of karst cave geological composite foundation
The invention relates to the technical field of civil construction, and particularly relates to a construction method of a karst cave geological composite foundation. The construction method comprises the following steps that a, according to the designed surveying and mapping pile body position, geological exploration is conducted on the pile body position; b, drilling is conducted on the pile body position containing a karst cave, and a steel casing is synchronously placed till a drilling machine drills through the top of the karst cave; c, the karst cave is filled with gravelly soil to the karst cave top plate position, and a punching hammer is utilized for repeatedly punching and extruding the gravelly soil till the karst cave is filled compactly; d, the drilling machine is adopted for drilling at the karst cave backfill position, a crane is adopted for hoisting in an extruding and expanding support disc machine, extruding, expanding and rotating are conducted at the preset position, and an extruding and expanding support disc space is formed; e, drilling continues to be conducted, the steel casing is synchronously placed till the next karst cave is encountered or the drilling depth reaches the designed elevation, and if the next karst cave is encountered, the steps b, c and d are repeated for drilling construction; f, a reinforcement cage is placed; and g, a guide pipe method is adopted for pouring concrete, and a pile body and a support disc are formed. According to the construction method, the bearing capability of the foundation overall structure is improved.
本申请涉及土建施工的技术领域，尤其是涉及一种溶洞地质复合地基施工方法，其包括以下步骤：a.根据设计测绘桩体位置，对桩体位置进行地质勘探；b.在包含溶洞的桩体位置进行钻孔并同步安放钢护筒，直至钻孔机钻穿溶洞顶部；c.用碎石土填充溶洞至岩溶顶板位置处，并利用冲孔锤反复冲挤碎石土直至溶洞填充密实；d.采用钻孔机在溶洞回填物处钻孔，采用吊机吊入挤扩支盘机，在预定位置挤扩旋转，形成挤扩支盘空间；e.继续钻孔并同步安放钢护筒，直至遇到下一个溶洞或钻孔深度达到设计标高，若遇到下一个溶洞，则重复步骤b、c、d进行钻孔施工；f.安放钢筋笼；g.采用导管法灌注混凝土形成桩身以及支盘。本申请具提高了地基整体结构的承载能力。
Construction method of karst cave geological composite foundation
The invention relates to the technical field of civil construction, and particularly relates to a construction method of a karst cave geological composite foundation. The construction method comprises the following steps that a, according to the designed surveying and mapping pile body position, geological exploration is conducted on the pile body position; b, drilling is conducted on the pile body position containing a karst cave, and a steel casing is synchronously placed till a drilling machine drills through the top of the karst cave; c, the karst cave is filled with gravelly soil to the karst cave top plate position, and a punching hammer is utilized for repeatedly punching and extruding the gravelly soil till the karst cave is filled compactly; d, the drilling machine is adopted for drilling at the karst cave backfill position, a crane is adopted for hoisting in an extruding and expanding support disc machine, extruding, expanding and rotating are conducted at the preset position, and an extruding and expanding support disc space is formed; e, drilling continues to be conducted, the steel casing is synchronously placed till the next karst cave is encountered or the drilling depth reaches the designed elevation, and if the next karst cave is encountered, the steps b, c and d are repeated for drilling construction; f, a reinforcement cage is placed; and g, a guide pipe method is adopted for pouring concrete, and a pile body and a support disc are formed. According to the construction method, the bearing capability of the foundation overall structure is improved.
本申请涉及土建施工的技术领域，尤其是涉及一种溶洞地质复合地基施工方法，其包括以下步骤：a.根据设计测绘桩体位置，对桩体位置进行地质勘探；b.在包含溶洞的桩体位置进行钻孔并同步安放钢护筒，直至钻孔机钻穿溶洞顶部；c.用碎石土填充溶洞至岩溶顶板位置处，并利用冲孔锤反复冲挤碎石土直至溶洞填充密实；d.采用钻孔机在溶洞回填物处钻孔，采用吊机吊入挤扩支盘机，在预定位置挤扩旋转，形成挤扩支盘空间；e.继续钻孔并同步安放钢护筒，直至遇到下一个溶洞或钻孔深度达到设计标高，若遇到下一个溶洞，则重复步骤b、c、d进行钻孔施工；f.安放钢筋笼；g.采用导管法灌注混凝土形成桩身以及支盘。本申请具提高了地基整体结构的承载能力。
Construction method of karst cave geological composite foundation
一种溶洞地质复合地基施工方法
ZHAN JIANBO (author) / HUANG JUNYUN (author) / PENG YUHAI (author)
2021-06-11
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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