Determination method of mixing proportion for anti-floating anchor rod grouting construction in underground water-enriched geological condition

Abstract

The invention discloses an anti-floating anchor rod construction mix proportion determination method under the geological condition of being rich in ground water; the method adopts a thick PVC tube and a thin PVC tube; the lower opening of the thick pipe is sealed with a waterproof cloth, then the thick pipe is placed into the borehole; the thick pipe is injected with water; the water level is the same to the actual water level inside the borehole; the thin pipe is placed into the thick pipe to be firmly fixed; the mixed mortar is injected into the thick pipe through the thin pipe until all the water inside the thick pipe is extruded; then the thin pipe is pulled out; the thick pipe is injected with mortar under the level of the mortar is parallel to the spout; the thick pipe is pulled out and the sealed opening on the lower end is opened; the mortar in the pipe is poured out and the segregation degree of the bottom mortar is checked; if the segregation degree is not proper, the waterusage is reduced for the next experiment until the segregation degree of the bottom mortar is slight; the final construction mix proportion is determined for the formal construction. The anti-floating anchor rod construction mix proportion determination method is adopted to guarantee the grouting quality of the anti-floating anchor rod and improve the efficacy; the loss caused by the rework is avoided; the anti-floating anchor rod construction mix proportion determination method has higher popularization and application values.

Description

technical field [0001] The invention relates to an anti-floating technology for underground engineering foundations; in particular, it relates to a method for determining a grouting scheme in grouting construction of anti-floating anchor rods. Background technique [0002] Under the condition of rich groundwater foundation, due to the high groundwater level, conventional drainage schemes cannot be adopted to remove groundwater. Therefore, choosing a technically feasible and economically reasonable grouting scheme is the key to ensure the smooth completion of the entire anti-floating foundation project. Under such geological conditions, the traditional grouting scheme is mechanical pressure grouting. This scheme is feasible in principle in foundation construction without groundwater, but it is difficult to solve the following problems in foundation construction rich in groundwater: [0003] (1) With a normal water-cement ratio, when encountering groundwater, the mortar is pr...

AI Technical Summary

Problems solved by technology

Under such geological conditions, the traditional grouting scheme is mechanical pressure grouting. This scheme is feasible in principle in foundation construction without groundwater, but it is difficult to solve the following problems in foundation construction rich in groundwater:

[0003] (1) With a normal water-cement ratio, when encountering groundwater, the mortar is prone to segregation, and it is difficult to guarantee the quality of grouting

[0004] (2) The water-cement ratio is too small, the machine cannot operate, and normal construction cannot be guaranteed

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