High-content fly ash-based secant pile building method for water blocking curtain

Abstract

The invention discloses a high-content fly ash-based secant pile building method for a water blocking curtain. Secant pile construction is performed by the aid of a rotary drilling rig, secant piles are held by each other and enter a waterproof clay layer or a mudstone layer, high-content fly ash-based grouting materials are poured into the secant piles, I-beams are inserted intermittently, and acontinuous secant pile wall used as the anti-seepage water blocking curtain is formed. According to the method, the problems of low secant pile hole forming speed, tedious and complex pouring procedures, slurry sedimentation, high concrete pouring cost and high construction site requirements can be solved effectively, and the continuity and the anti-seepage performance of the water blocking curtain can be improved while the problems of low construction efficiency, high cost, large construction site and the like can be solved.

Description

technical field [0001] The invention relates to the technical field of groundwater interception, anti-seepage and pollution control such as mine curtains, water conservancy project curtains, pollutant isolation, and foundation pit water-stop curtains, and in particular relates to a high-volume fly ash-based occlusion used for water-blocking curtains pile construction method. Background technique [0002] The construction technology of occlusal piles is a mature technology. If super-retarded concrete and full-casing drilling rigs are required for construction, the construction cost is particularly high. The cost is almost twice that of an underground diaphragm wall with the same thickness, and the hole forming speed is slow. Twice the hole-forming time of cast-in-situ piles. The construction technology of occlusal piles in deep sand and pebble strata is different from other strata. The existing technology has the following problems in the construction of water-blocking curta...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for constructing high-volume fly ash-based occlusal piles for water-blocking curtains, which can effectively solve the problems of slow pore-forming speed of occlusal piles, cumbersome and complicated pouring procedures, mud precipitation, and high cost of pouring concrete. The problem of large demand for construction sites, while solving problems such as low construction efficiency, high cost, and large construction sites, improves the continuity and anti-seepage performance of water-blocking curtains

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