High-development karst area superfine hole pile construction method

Abstract

The invention provides a high-development karst area superfine hole pile construction method, and belongs to the field of building engineering construction. By comprehensively considering the factorssuch as hydrogeological conditions, the construction period and existing machinery equipment, karst processing drilling cast-in-place piles are constructed by adopting a 360-degree rotation full sleeve, and a matched construction technology is formed. The high-development karst area superfine hole pile construction method is concluded and formed through successful application of the project to solve the problems that the engineering cost is greatly increased, the construction period is seriously delayed and even the construction is forced to be interrupted due to the engineering accident occurrence caused by hole collapse due to that fact that effective measures do not be adopted in the current drilling cast-in-place pile construction process. According to punching method construction adopted under the general conditions by the karst hydrogeological drilling cast-in-place piles, rubble and concrete backfilling and other measures are carried out in the punching process, the constructionprogress is slow, and as the number of backfill is uncontrollable, the construction period and the cost are uncontrollable.

Description

technical field [0001] The invention relates to a construction method for ultra-fine hole piles in strongly developed karst areas, belonging to the field of construction engineering. Background technique [0002] Karst geology is widely distributed in my country. During the construction of bored piles, failure to take effective measures leads to hole collapse, which leads to engineering accidents, which greatly increases the cost of the project, seriously delays the construction period, and even has to stop the construction. Karst geology bored piles are generally constructed by the punching method. In the punching project, measures such as backfilling with rubble, concrete, etc., the construction progress is slow, and because the amount of backfilling is uncontrollable, the construction period and cost are uncontrollable. Contents of the invention [0003] China Railway Second Bureau No. 1 Engineering Co., Ltd. comprehensively considered factors such as hydrogeological co...

AI Technical Summary

Problems solved by technology

[0002] Karst geology is widely distributed in our country. During the construction of bored piles, due to failure to take effective measures to cause hole collapse, engineering accidents occurred, which greatly increased the cost of the project, seriously delayed the construction period, and even forced to suspend the construction.

Karst geology bored piles are generally constructed by the punching method. In the punching project, measures such as backfilling with rubble and concrete are used. The construction progress is slow, and because the amount of backfilling is uncontrollable, the construction period and cost are uncontrollable.

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