Shotcrete bolt and shotcrete support is a general support method in the construction of foundation pits, roads, subways, tunnels, roadways and other projects. It selects reasonable support parameters for different geological conditions and construction environments, and adopts the correct construction process. ,, It is the key to guarantee the quality of the bolting and spraying support of the spraying machine to achieve the expected supporting effect. Henan Haoli sprayer manufacturers analyzed the main factors affecting the quality of spray gun support.
1. The surface of the rock is not flushed, so that the spraying layer of the sprayer and the surrounding rock are not firmly bonded, forming a hollow crack.
2. The grouting of the anchor rod is not full and the installation is not firm, resulting in slippage of the spraying layer of the spraying machine.
3, blasting molding is not good, undulating, stress concentration in the prominent parts, shotcrete spraying layer is thin, easy to crack.
4, less drilling, put "cannon", serious destruction of the surrounding rock, increase the burden of spraying machine support.
5, repeated blasting, repeated stress disturbances, especially the spraying machine support measures are inappropriate, the latter blasting tends to damage the early support, the formation of a large landslide.
6. In the more stressful caverns, the timing of the shotcreting machine support and the options were incorrect, and the closed system could not be formed in time.
7. The shotcreting machine sprays too thick once. In the initial stage of large deformation of the surrounding rock, the sprayer support stiffness is too large and it is easy to overload.
8. The technicians have not mastered the shotcrete bolting and spraying support technology and mishandled the treatment.
1. The surface of the rock is not flushed, so that the spraying layer of the sprayer and the surrounding rock are not firmly bonded, forming a hollow crack.
2. The grouting of the anchor rod is not full and the installation is not firm, resulting in slippage of the spraying layer of the spraying machine.
3, blasting molding is not good, undulating, stress concentration in the prominent parts, shotcrete spraying layer is thin, easy to crack.
4, less drilling, put "cannon", serious destruction of the surrounding rock, increase the burden of spraying machine support.
5, repeated blasting, repeated stress disturbances, especially the spraying machine support measures are inappropriate, the latter blasting tends to damage the early support, the formation of a large landslide.
6. In the more stressful caverns, the timing of the shotcreting machine support and the options were incorrect, and the closed system could not be formed in time.
7. The shotcreting machine sprays too thick once. In the initial stage of large deformation of the surrounding rock, the sprayer support stiffness is too large and it is easy to overload.
8. The technicians have not mastered the shotcrete bolting and spraying support technology and mishandled the treatment.
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