A static pressure grouting construction method before pipe jacking construction

Abstract

The invention discloses a static-pressure grouting construction method before pipe jacking construction. Static-pressure grouting is performed after drilling; before drilling, a down-the-hole drill with the following structure is obtained first, wherein the down-the-hole drill comprises a slide frame and a slide plate, and a rotary assembly and a drill rod are installed on the slide plate; a guidebase is installed at the lower end of the slide frame; a big-end-down conical dust fall cover is installed on the guide base, and a first through hole for the drill rod to penetrate through is formedin the top of the dust fall cover; spray devices are installed on the inner wall of the dust fall cover, and the spray devices are located on the upper portion of the dust fall cover and arranged obliquely downwards towards the middle of the dust fall cover; a water inlet communicated with the spray devices is further formed in the dust fall cover, and a water supply pump is connected to the water inlet. In drilling, water is supplied to the spray devices through the water supply pump, and then dust in the dust fall cover makes contact with water mist to fall. The method has the advantages that the drilling operation is easy, dust diffusion can be effectively suppressed, little dust rises, and the working environment can be easily improved.

Description

technical field [0001] The invention relates to the technical field of static pressure grouting construction, in particular to a static pressure grouting construction method before pipe jacking construction. Background technique [0002] The down-the-hole drilling rig is an impact rotary drilling rig. When drilling rock, the impactor dives into the hole. Through the gas distribution device (valve), the piston (hammer body) in the impactor reciprocates and strikes the tail, so that the drill bit impacts the rock at the bottom of the hole. . The high-speed rotation of the impactor in the hole is realized by a separate rotary mechanism, that is, an electric motor or a pneumatic rotating device outside the hole, and a drill pipe connected to the rear end of the impactor. The rock powder produced during rock drilling is washed out of the hole by the wind-water mixed gas. The mixed gas is injected into the impactor through the center of the drill pipe by the powder discharge mech...

AI Technical Summary

Problems solved by technology

During the construction process of the down-the-hole drilling rig, the soil residue will be ejected along with the drill pipe, which will have a great impact on the surrounding environment and is not conducive to safe and civilized construction

In the traditional construction process, the fog cannon is aimed at the position of the drill pipe to reduce dust, but the actual construction effect is not good

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