Construction method of soil mixing wall (SMW) engineering method

Abstract

The invention discloses a construction method of a soil mixing wall (SMW) engineering method. The construction method includes the following steps: (1) arranging an SMW engineering method pile machine; (2) arranging a ridge spar assembly; (3) arranging a base frame; (4) arranging a winch; (5) downwards cutting soil; (6) performing stirring to form a cement soil pile; (7) inserting profile steel into a positioning sliding chute; (8) placing the positioning sliding chute above the cement soil pile; (9) inserting the profile steel into the cement soil pile; (10) completing construction of one pile and (11) repeating step (4) to step (10) to finally complete construction of a profile steel cement SMW. Therefore the work of drilling, grouting, stirring, profile steel hoisting and profile steel accurate inserting into the cement soil pile can be completed by aid of the SMW engineering method pile machine. According to the construction method, the cement soil continuous wall and the profile steel inserted into the cement soil continuous wall together form a structural body having bending resisting and shearing resisting effects through drilling in soil, grouting and stirring procedures, and accordingly a support system normally formed by a concrete pile and a water stop pile is replaced.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to a construction method of the SMW construction method. Background technique [0002] The SMW construction method is also known as the stiff cement-soil mixing pile method, that is, inserting H-shaped steel (mostly H-shaped steel, but also Larsen type steel sheet piles, steel pipes, etc.) Standing up, it becomes the retaining wall of the supporting structure with both functions of force bearing and anti-seepage. [0003] The SMW construction method is a kind of rigid composite enclosure structure, which cuts the soil in the original formation through a special super-power and super-torque mixing pile drilling rig, and at the same time injects the cement slurry reinforcement into the soil under high pressure from the front of the drill bit, and the cutting The crushed soil is fully and vigorously stirred, and the construction units are overlapped and overlapp...

AI Technical Summary

Problems solved by technology

[0005] 1. The three-axis machine can only be used for drilling, grouting and mixing;

[0006] 2. The insertion process of section steel needs to be completed by opening other special equipment such as cranes and vibrating hammers;

[0007] 3. When the two sets of equipment are cross-constructed, the time delay will easily lead to hardening of the cement soil and increase the difficulty of inserting the profiled steel; the secondary displacement of the profiled steel will also easily cause alignment deviation and affect the quality;

[0008] 4. Too many blades and compressed air are blown out of the drill bit, and the cement slurry injected into the soil will inevitably return to the ground above the ground, resulting in the reduction of effective cement in the pile, reducing the strength and generating greater waste

However, the H-shaped steel mounted on the SMW construction machinery equipment does not have an accurate alignment device, so that the H-shaped steel can be accurately and quickly positioned directly above the completed cement-soil pile, and the process of inserting the H-shaped steel is performed.

[0011] At present, there is no efficient construction method that can quickly and accurately insert section steel before the cement slurry hardens after completing the cement-soil pile vertical underground continuous water-stop wall alone.

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