Gravel bed foundation deep-cement-mixing pile impervious wall construction method

Abstract

The invention relates to a gravel bed foundation deep-cement-mixing pile impervious wall construction method, and relates to the technical field of cement mixing pile impervious wall construction. Thegravel bed foundation deep-cement-mixing pile impervious wall construction method sequentially comprises the following steps of levelling a ground, excavating a guide slot, surveying and setting out,placing a pile machine in position and levelling, preparing for drilling, drilling a soft soil layer, drilling a gravel bed, drilling after penetrating through the gravel bed, and lifting, spouting and stirring until forming a pile on the ground. According to the gravel bed foundation deep-cement-mixing pile impervious wall construction method provided by the invention, aiming at a foundation with the gravel bed, a soil body can be smoothly drilled, cut and stirred, and a cement grout is quickly fully-filled in a clearance of the gravel bed, so that the quality of a finally formed cement mixing pile impervious wall is further improved.

Description

technical field [0001] The invention relates to the technical field of construction of an anti-seepage wall of cement-soil mixing piles, in particular to a construction method for an anti-seepage wall of cement-soil mixing piles deep in a gravel layer foundation. Background technique [0002] The deep mixing technology with cement slurry as the main curing agent has been widely used in the water conservancy industry for the anti-seepage reinforcement of dams and their foundations with plain fill, clay, silt, and sand as the main stratum, and for the silt soil Soil and silt are used as foundation reinforcement for small and medium-sized sluices and pumping stations in the main strata. However, since the construction sites of hydraulic structures such as dykes, dams, gates, and stations are located on river banks or riverbeds, in addition to the backfill soil of dykes and dams, the engineering geological conditions of the undisturbed foundations are affected by alluvial sedime...

AI Technical Summary

Problems solved by technology

[0003] Generally, the gravel layer is often located in the middle and lower part of the anti-seepage reinforcement stratum of the embankment, but compared with the soft soil layers such as plain fill, clayey soil, silt, sandy soil, etc., the gravel layer is squeezed by its adjacent soil layers under natural conditions. Compaction, during the drilling and mixing process of the mixing drill bit of the deep mixing pile machine, it is difficult to drill, cut and mix the soil, so it is difficult to fill the gaps in the gravel layer with cement slurry, which will affect the seepage prevention of the final cement-soil mixing pile The quality of the walls, therefore, could be improved

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