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Method for excavating deep foundation pit in strongly developed limestone area
The invention provides a method for excavating a deep foundation pit in a strong development limestone area, which belongs to the technical field of foundation pit construction, and is characterized in that cement paste or cement-water glass double-liquid slurry is adopted to finely fill a karst cave in an enclosure structure, so that the construction quality of an underground diaphragm wall is guaranteed, and a project is more stable and reliable. Meanwhile, the limestone layer is subjected to encrypted grouting, the karst cave in the limestone area of the foundation pit can be effectively blocked, then the water seepage condition of the base is monitored in real time in combination with a water pumping test, it is ensured that the foundation pit is safe, the sudden water gushing event is avoided, and smooth proceeding of a project is protected. Besides, when the drilling and cracking all-in-one machine is used for limestone crushing operation, compared with a crushing hammer, the drilling and cracking all-in-one machine is small in vibration in the crushing process, the influence on the stratum is smaller, and the construction safety and quality can be better guaranteed. The stability of foundation pit excavation can be effectively improved, and potential safety hazards are reduced.
本发明提供了一种强发育灰岩区深基坑开挖方法，属于基坑施工的技术领域，通过采用水泥浆或水泥水玻璃双液浆对围护结构内溶洞进行精细填充，不仅保障了地连墙的施工质量，还使工程更加稳固可靠。同时，对灰岩层进行加密注浆，能够有效封堵基坑灰岩区溶洞，再结合抽水试验实时监测基底渗水情况，确保基坑安全无虞，避免突涌水事件的发生，为工程的顺利推进保驾护航。此外，使用钻裂一体机进行灰岩破碎作业，相较于破碎锤，其在破碎过程中震动较小，对地层的影响也更小，更有利于保障施工安全与质量。本发明可以有效提高基坑开挖的稳定性，降低安全隐患。
Method for excavating deep foundation pit in strongly developed limestone area
The invention provides a method for excavating a deep foundation pit in a strong development limestone area, which belongs to the technical field of foundation pit construction, and is characterized in that cement paste or cement-water glass double-liquid slurry is adopted to finely fill a karst cave in an enclosure structure, so that the construction quality of an underground diaphragm wall is guaranteed, and a project is more stable and reliable. Meanwhile, the limestone layer is subjected to encrypted grouting, the karst cave in the limestone area of the foundation pit can be effectively blocked, then the water seepage condition of the base is monitored in real time in combination with a water pumping test, it is ensured that the foundation pit is safe, the sudden water gushing event is avoided, and smooth proceeding of a project is protected. Besides, when the drilling and cracking all-in-one machine is used for limestone crushing operation, compared with a crushing hammer, the drilling and cracking all-in-one machine is small in vibration in the crushing process, the influence on the stratum is smaller, and the construction safety and quality can be better guaranteed. The stability of foundation pit excavation can be effectively improved, and potential safety hazards are reduced.
本发明提供了一种强发育灰岩区深基坑开挖方法，属于基坑施工的技术领域，通过采用水泥浆或水泥水玻璃双液浆对围护结构内溶洞进行精细填充，不仅保障了地连墙的施工质量，还使工程更加稳固可靠。同时，对灰岩层进行加密注浆，能够有效封堵基坑灰岩区溶洞，再结合抽水试验实时监测基底渗水情况，确保基坑安全无虞，避免突涌水事件的发生，为工程的顺利推进保驾护航。此外，使用钻裂一体机进行灰岩破碎作业，相较于破碎锤，其在破碎过程中震动较小，对地层的影响也更小，更有利于保障施工安全与质量。本发明可以有效提高基坑开挖的稳定性，降低安全隐患。
Method for excavating deep foundation pit in strongly developed limestone area
一种强发育灰岩区深基坑开挖方法
CAO HUA (author) / HOU ZHIPENG (author) / ZHANG LEI (author) / SHEN HAIRUI (author) / FENG CHAO (author) / HU BINGXU (author) / NIU QINGSHAN (author)
2024-11-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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