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Presplitting grouting method for pile bottom of rock-socketed grouting pile
The invention relates to a presplitting grouting method for a pile bottom of a rock-socketed grouting pile. The presplitting grouting method for the pile bottom of the rock-socketed grouting pile comprises the following steps that 1 according to coring inspection of the pile bottom, static-load detection and high-strain detection are conducted on the rock-socketed grouting pile; presplitting is conducted on a pedestal rock at the bottom of the pile, and a grout channel is formed; when a core sample is taken out, rotation is avoided, a positional relation graph of a crack horizontal projection and a sounding pipe is drawn in site, and the depth of the fissure is indicated; 2 according to controlled presplitting of a pedestal rock at the bottom of the pile, an inorganic compound static fracturing agent with quick lime as the main body is used; a single hole is filled with the static expanding agent, and the original hole is enlarged further through a uniform radial pressure; the explosive payload of the static fracturing agent is confirmed according to a core taking hole, the sounding pipe and a fissure positional relation and the depth of the fissure of the core sample; 3 according to grouting and inspection, bearing capacity detection is conducted on a reinforcing rock-socketed rock pile after grouting is finished for 28 days. After a micro-fractured rock at the bottom of the pile is processed through the presplitting grouting method for the pile bottom of the rock-socketed grouting pile, the bearing capacity of the pile end can be increased by 30 to 50 percents by using the high-strain detection, and the effect is obvious.
Presplitting grouting method for pile bottom of rock-socketed grouting pile
The invention relates to a presplitting grouting method for a pile bottom of a rock-socketed grouting pile. The presplitting grouting method for the pile bottom of the rock-socketed grouting pile comprises the following steps that 1 according to coring inspection of the pile bottom, static-load detection and high-strain detection are conducted on the rock-socketed grouting pile; presplitting is conducted on a pedestal rock at the bottom of the pile, and a grout channel is formed; when a core sample is taken out, rotation is avoided, a positional relation graph of a crack horizontal projection and a sounding pipe is drawn in site, and the depth of the fissure is indicated; 2 according to controlled presplitting of a pedestal rock at the bottom of the pile, an inorganic compound static fracturing agent with quick lime as the main body is used; a single hole is filled with the static expanding agent, and the original hole is enlarged further through a uniform radial pressure; the explosive payload of the static fracturing agent is confirmed according to a core taking hole, the sounding pipe and a fissure positional relation and the depth of the fissure of the core sample; 3 according to grouting and inspection, bearing capacity detection is conducted on a reinforcing rock-socketed rock pile after grouting is finished for 28 days. After a micro-fractured rock at the bottom of the pile is processed through the presplitting grouting method for the pile bottom of the rock-socketed grouting pile, the bearing capacity of the pile end can be increased by 30 to 50 percents by using the high-strain detection, and the effect is obvious.
Presplitting grouting method for pile bottom of rock-socketed grouting pile
HE JIAN (author) / TAN XING (author) / KONG WEIYI (author) / LI SHUANGLONG (author) / XIAO JIANBO (author) / ZHENG XUEGANG (author)
2015-09-30
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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