Construction method of enclosing level rotary-jet pile hole-mouth using double-liquid slip jection method

Abstract

A kind uses the double fluid fill thick liquid pent-up flat spin spurt the pile manhole method, including the following step: 1) drills a hole on the bulkhead; 2) install the steel thimble with stoping penstock outside the bulhhead, this steel thimble has three valves: first valve install in steel pipe base; second valve install in steel pipe crown above the first valve; third valve install in the first valve and second valve's flank; 3) drill hole construction: closes the second valve, turns on the third valve, turns on lathe the drill hole spurts a siphuncle insertion manhole; turns on the first valve; 4) turns on lathe spurts the construction; 5) manhole trap: After turning on lathe spurts the conclusion drew out turns on lathe the nozzle, closes the first valve and the third valve; 6) pours water the glass; Turns on the second valve, by the second valve insertion note thick liquid tube, pours into the sodium silicate; 7) renders the inspection. This invention needs increase few equipment only, and job practice simple reliable, the manhole seal's construction speed enhances one time, the hole oral area intensity to enhance above 50%.

Description

technical field [0001] The invention relates to a construction method used in the technical field of tunnel engineering, in particular to a construction method for sealing the hole of a horizontal jet grouting pile by using a double-liquid grouting method. Background technique [0002] In recent years, due to the continuous deepening of the construction of urban subways, underground passages, and cross-river tunnels, it is necessary to reinforce the soft soil foundation underground on the excavation surface. In this way, the horizontal jet grouting reinforcement construction technology based on the vertical jet jet technology came into being. The construction of the horizontal rotary spraying method can be carried out in the deep underground that the vertical rotary spraying method cannot reach (such as large depth underground, building obstacles on the ground, etc.), which expands the scope of use of the rotary spraying method. At the same time, the horizontal rotary spray...

AI Technical Summary

Problems solved by technology

Although the horizontal rotary spraying has been applied to practical projects for many years at home and abroad, the problem of water-tight sealing of the orifice has not been well solved.

However, there is no practical method for the treatment of the outflow of drilling water and groundwater during drilling, and the discharge of excess mud during the rotary spraying process.

In addition, it is very inconvenient to drive wooden piles in the small underground construction space, and it is difficult to operate the wooden piles and driving equipment underground, which is very uneconomical and reasonable

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