A Dry Powder Type Synchronous Grouting Construction Technology

Abstract

The invention discloses a dry powder type synchronous grouting construction technology which comprises the following steps: producing and preparing dedicated mortar for the dry powder type synchronous grouting; mixing grout on the synchronous grouting construction site; automatically delivering the grout to a shield machine head; carrying out shield excavating synchronous grouting in tunnel construction interspaces; cleaning a stock line and shield grouting equipment. As a dry powder mortar construction is adopted, the grout can be taken and used at random as ' tap water', the operation is convenient, the grout slump constant can be adjusted instantly, the needed grout can be prepared according to various working conditions, and the construction quality is improved; the stock line is integrated, and the automatic grout delivering is realized; the problems of transportation, storage and quality of wet grout are well solved, district limitation is broken through, and the construction technology is suitable for being popularized nationwide and even in a wider range.

Description

technical field [0001] The invention relates to a construction method, in particular to a dry powder synchronous grouting construction process. Background technique [0002] Synchronous grouting refers to a construction process that is carried out synchronously with shield excavation during the tunnel shield construction process, and fills the gap at the tail of the shield through grouting to prevent the tunnel from floating. As an important link in the construction process of shield tunneling, synchronous grouting plays a very important role in controlling the formation and stability of tunnel segments, resisting the deformation of surrounding soil, and improving the waterproof performance of tunnels. [0003] Various synchronous grouting construction techniques currently used at home and abroad have their own advantages and disadvantages, and their effects vary, but they are all wet grouting techniques. Wet slurry is mostly mixed on the construction site, with various tec...

AI Technical Summary

Problems solved by technology

[0003] At present, all kinds of synchronous grouting construction techniques used at home and abroad have their own advantages and disadvantages, and the effects are different, but they are all wet grouting techniques.

Wet slurry is mostly mixed on the construction site, with various technological processes and uneven quality of mixed slurry, resulting in endless construction accidents, and the effect of controlling the uplift of the tunnel in the later stage is also worrying; and wet slurry needs to be stored and used inconvenient

If the construction technology of ready-mixed wet slurry is adopted, the transportation cost will be high