Two-way stirring based SMW construction method and tri-axial stirring equipment

Abstract

The invention relates to a two-way stirring based SMW construction method, comprising the following steps: 1) measurement and staking-out; 2) making a guide slot; 3) drilling machine stationing and drilling; 4) completion. The invention further relates to tri-axial stirring equipment for realizing the construction method; the equipment comprises a chassis, a rack, a power box body and three drilling rods; the rack is arranged on the chassis, the power box body is connected at the upper ends of the three drilling rods and drives the three drilling rods respectively; the bottom end of each drilling rod is provided with a drilling bit, the axle centers of the three drilling rods are arranged at the same straight line, and stirring drilling rods at two side shafts are two-way stirring drilling rods, the stirring drilling rod of a middle shaft is a one-way stirring drilling rod, and the middle shaft is provided with a compressed air pipe; the stirring drilling rods at two side shafts comprise an inner drilling rod and an outer drilling rod, and at least two groups of stirring blades are respectively arranged on the inner drilling rod and the outer drilling rod, and the stirring blades are sequentially arranged axially along the drilling rod; and the rotating directions of the inner and outer drilling rods are opposite. Compared with the prior art, the total construction time of the technical proposal can be shortened half, the construction cost of the SMW construction method is low, and environmental-protection requirements are met.

Description

technical field [0001] The invention relates to a civil engineering construction method, in particular to a SMW construction method based on two-way stirring and three-axis stirring equipment. Background technique [0002] In the prior art, the SMW (Soil Mixing Wall Column Soil Cement Wall) construction method is to use a special multi-axis mixer to drill and cut the soil body on the spot, and at the same time inject the cement slurry into the soil body at the end of the drill bit, and mix it thoroughly. After mixing, insert H-shaped steel or other profiles into the mixing pile body to form an underground continuous wall, which can be directly used as a soil retaining and water-stopping structure. This construction method came out in Japan in 1976, and as of 1993, the construction performance in various parts of Japan has accounted for about 50% of the construction of underground diaphragm walls by various construction methods in Japan. Because the SMW construction method h...

AI Technical Summary

Problems solved by technology

[0004] (1) The mixing of cement and soil is uneven, which affects the quality of the wall;

[0005] (2) The cement slurry is unevenly distributed along the depth, especially the amount of cement slurry in the lower part is difficult to guarantee;

[0006] (3) During the construction process, under the interaction of earth pressure, pore water pressure and spraying pressure, the cement slurry goes up the drill pipe, and there is a common phenomenon of ground slurry, which affects the actual cement slurry mixing amount

Images