Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to the technical field of engineering construction in karst areas, in particular to a construction method for reinforcing a karst cave under a built-in pile. The construction method comprises the following steps that measuring and setting out are carried out on a pile position, drilling in advance is carried out on the pile position by adopting a coring drilling machine, and the position of the karst cave and the slurry leakage condition are pre-judged according to the soil property parameter and integrity of a core sample, and a drill hole detected by core pulling is utilized. According to the construction method provided by the invention, after filling and grouting reinforcement are conducted on the pile end bearing layer karst cave, cement mortar in the karst cave reinforcement area meets the pile end bearing capacity requirement, the engineering cost is greatly reduced, waste caused by large-volume concrete filling is avoided, small equipment is adopted for hole cleaning and replacement, the high-pressure grouting method is convenient and rapid, the working efficiency is improved, the construction period is shortened. the karst cave grouting reinforcement quality is guaranteed, the construction cost of pile bottom bearing layer karst cave reinforcement is reduced, and the problems that at present, common high-pressure grouting is difficult to achieve dense grouting, the strength is not high, and the design requirement is difficult to meet are solved.
本发明涉及岩溶地区工程施工技术领域，尤其为一种嵌固桩底下溶洞加固的施工方法，其方法包括以下步骤：对桩位进行测量放样，采用取芯钻机对桩位处进行超前钻孔，通过芯样的土质参数和完整度预判溶洞位置和漏浆状况，利用抽芯检测的钻孔；本发明提出的施工方法，桩端持力层溶洞冲填注浆加固后，溶洞加固区域水泥砂浆满足桩端承载力要求，大幅度降低工程成本，避免大体积填充混凝土造成的浪费，且采用小型设备清孔换填、高压注浆法方便快捷，提高工作效率压缩工期，保证了溶洞注浆加固质量，减少桩底持力层溶洞加固的造价，解决了目前普通高压注浆不仅难以注浆密实，且强度不高，难以满足设计要求的问题。
The invention relates to the technical field of engineering construction in karst areas, in particular to a construction method for reinforcing a karst cave under a built-in pile. The construction method comprises the following steps that measuring and setting out are carried out on a pile position, drilling in advance is carried out on the pile position by adopting a coring drilling machine, and the position of the karst cave and the slurry leakage condition are pre-judged according to the soil property parameter and integrity of a core sample, and a drill hole detected by core pulling is utilized. According to the construction method provided by the invention, after filling and grouting reinforcement are conducted on the pile end bearing layer karst cave, cement mortar in the karst cave reinforcement area meets the pile end bearing capacity requirement, the engineering cost is greatly reduced, waste caused by large-volume concrete filling is avoided, small equipment is adopted for hole cleaning and replacement, the high-pressure grouting method is convenient and rapid, the working efficiency is improved, the construction period is shortened. the karst cave grouting reinforcement quality is guaranteed, the construction cost of pile bottom bearing layer karst cave reinforcement is reduced, and the problems that at present, common high-pressure grouting is difficult to achieve dense grouting, the strength is not high, and the design requirement is difficult to meet are solved.
本发明涉及岩溶地区工程施工技术领域，尤其为一种嵌固桩底下溶洞加固的施工方法，其方法包括以下步骤：对桩位进行测量放样，采用取芯钻机对桩位处进行超前钻孔，通过芯样的土质参数和完整度预判溶洞位置和漏浆状况，利用抽芯检测的钻孔；本发明提出的施工方法，桩端持力层溶洞冲填注浆加固后，溶洞加固区域水泥砂浆满足桩端承载力要求，大幅度降低工程成本，避免大体积填充混凝土造成的浪费，且采用小型设备清孔换填、高压注浆法方便快捷，提高工作效率压缩工期，保证了溶洞注浆加固质量，减少桩底持力层溶洞加固的造价，解决了目前普通高压注浆不仅难以注浆密实，且强度不高，难以满足设计要求的问题。
Construction method for reinforcing karst cave under built-in pile
一种嵌固桩底下溶洞加固的施工方法
15.10.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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