Grouting pipe for miscellaneous fill stratum and construction method

Abstract

Disclosed are a grouting pipe for a miscellaneous fill stratum and a construction method. The grouting pipe is mainly composed of an external grouting pipe body, an internal grouting pipe body, a slurry stop plug, a segment spacer ring and a sealing plug, wherein one end of the external grouting pipe body and the surface of the pipe body are provided with grouting holes; the internal grouting pipe body is fixed to the segment spacer ring through the slurry stop plug; a grouting hole is formed in the top end of the internal grouting pipe body, and grouting holes are evenly distributed around one end of the pipe body; the bottom end of the internal grouting pipe body is connected with a grouting machine through a mortar conveying pipe; the segment spacer ring is fixed to the inner wall of the external grouting pipe body. The grouting pipe has the characteristics of low pressure, high frequency, segmentation and quick grouting, thereby accurately controlling the grouting pressure and grouting parameters for the complex situations of miscellaneous fill stratums containing large gravel or building rubbish; a grouting curtain within a certain range is formed in the stratum, greening vegetation over the stratum is not affected, and the purpose of effectively reinforcing the miscellaneous fill stratum is achieved. The grouting pipe is convenient to use, conducts grouting quickly and can be widely applied to miscellaneous fill stratums needing reinforcing.

Description

technical field [0001] The invention relates to the technical field of grouting reinforcement, in particular to a grouting pipe used for miscellaneous fill soil formations and a construction method. technical background [0002] In the construction of tunnel engineering in miscellaneous fill strata, in order to ensure construction safety, improve the effect of stratum reinforcement, and reduce the impact of construction on the surrounding environment, grouting reinforcement method is usually used to reinforce the miscellaneous fill stratum. The particles of miscellaneous fill are very uneven, and the soil may contain large pieces of gravel or construction waste, so the gaps between particles vary greatly. If one-time grouting or high-pressure grouting is used for reinforcement, the grout will Diffusion is not easy to control, and it is difficult to achieve a good grouting effect; if the grouting pressure is too large or the grout consistency is low, it is easy to cause exces...

AI Technical Summary

Problems solved by technology

The particles of miscellaneous fill are very uneven, and the soil may contain large pieces of gravel or construction waste, so the gaps between particles vary greatly. If one-time grouting or high-pressure grouting is used for reinforcement, the grout will Diffusion is not easy to control, and it is difficult to achieve a good grouting effect; if the grouting pressure is too large or the grout consistency is low, it is easy to cause excessive deformation of the soil and grouting on the ground; if one-time grouting is used, it is often not achieved. for the purpose of strengthening the soil

[0003] At present, the treatment methods for the impact of miscellaneous fill grouting on the surface greening plants and the phenomenon of grouting are often to reduce the grouting pressure and use mixed grout. This method has the disadvantages of slow grouting speed, high material cost, and process complex, long-term problems

In addition, if the grouting pressure is too high, it may cause grouting on the ground, and it will not be possible to form a controllable grouting curtain in the mixed filling soil layer, which will affect the normal growth of green vegetation on the ground

If the grouting pressure is too low, a good reinforcement effect cannot be obtained

Images