Construction equipment for generating horizontal jet grouting reinforcing body by injecting double-liquid liquid with high-pressure

Abstract

The invention discloses a piece of construction equipment which uses high pressure for spraying two-fluid slurry to generate a horizontal jet grouting reinforcing body and belongs to the field of construction engineering technology, comprising a high pressure pump, a low pressure pump, an air compressor, a current divider, a treble tubular drill spray rod, a multifunctional spray-head, a horizontal drill and an orifice sealing device; wherein, the high pressure pump, the low pressure pump and the air compressor are connected on the treble tubular drill spray rod by the current divider, and the treble tubular drill spray rod is supported and connected by a bracket of the horizontal drill and is controlled by a drive of the horizontal drill to rotate as well as makes advance and retreat movement back and forth and translational movement left and right; one end of the multifunctional spray-head is connected with the treble tubular drill spray rod by a screw thread, the orifice sealing device is arranged at an orifice of a horizontal jet grouting pile, the spray-head and the treble tubular drill spray rod pass through the orifice sealing device to carry out drilling and spraying, and the treble tubular drill spray rod is sealed with the orifice sealing device. The construction equipment overcomes the deficiencies in the existing horizontal jet grouting technique, and a horizontal jet grouting pile body can be formed in a running sand layer, therefore, the efficiency of jet grouting construction is greatly improved.

Description

technical field [0001] The invention relates to a construction equipment in the technical field of construction engineering, in particular to a construction equipment for generating a horizontal rotary spray reinforcement by high-pressure spraying double liquid slurry. Background technique [0002] The high-pressure rotary grouting construction technology is to spray high-pressure fluid from the rotating nozzle to cut the soil while mixing the cement slurry with the chopped soil. After chemical reaction, a solid reinforced soil column is formed, and the strength can reach more than several MPa. This construction method was invented by Dr. Nakanishi from NIT in Japan. At first, it was a simple single-pipe method (also known as CCP method), which only sprayed cement slurry; Compressed air wraps high-pressure cement slurry cutting and mixing, so that the diameter of the reinforced body is greatly increased compared with the single-pipe method; the triple-pipe method uses compre...

AI Technical Summary

Problems solved by technology

But the equipment of this invention has following several deficiencies: at first, cut the soil body for the first time with the water flow of super high pressure, can produce following several problems like this: 1) because the cement-soil mixture after the rotary grouting construction, is in fluidity 2) When this method is constructed in the silt layer below the groundwater level, phenomena such as sand liquefaction and quicksand will occur, which will make the soil and cement The mixture separates before hardening; resulting in quality problems; the rotary spraying technology cannot be used in the quicksand layer; 3) If the horizontal rotary spraying construction is carried out, the fluid mixed soil will flow out from the orifice, making the reinforcement invalid

However, due to the existence of cables, the drill spray rod cannot be rotated 360 degrees, and can only be used to swing back and forth for spraying, which reduces the construction efficiency and is very uneconomical.

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