A self-cleaning repeatable horizontal grouting pipe and its construction method

Abstract

The invention relates to a self-cleaning repeatable horizontal grouting pipe. The self-cleaning repeatable horizontal grouting pipe comprises a grouting casing pipe (1) and grouting holes (1a) arranged at intervals in the axial direction and circumferential direction of a grouting outer pipe. A pulp pipe (2) is arranged in the grouting casing pipe and composed of an inner-layer net pipe (3) and a net pipe supporting framework (4). The inner-layer net pipe wraps the net pipe supporting framework. The outer diameter of the pulp pipe is slightly larger than the inner diameter of the grouting casing pipe. The pulp pipe is closely attached to the inner wall of the grouting casing pipe. The invention further relates to a construction method for the self-cleaning repeatable horizontal grouting pipe. The self-cleaning repeatable horizontal grouting pipe and the construction method are suitable for grouting of grout long in setting time, blockage of the grouting pipe in the horizontal mud jacking process can be effectively avoided, and accordingly, repeated grouting in the same grouting pipe can be conveniently achieved. According to the self-cleaning repeatable horizontal grouting pipe and the construction method, materials can be saved, the manpower and material resource cost is reduced, the technology is simplified, and construction is convenient.

Description

technical field [0001] The invention relates to a self-cleaning and repeatable horizontal grouting pipe and a construction method thereof, belonging to the technical field of grouting and plugging in building construction. Background technique [0002] Trenchless technology refers to the new construction technology of laying, replacing and repairing various underground pipelines under the condition of excavating a very small part of the surface by using various geotechnical drilling equipment and technical means through guided and directional drilling. . In the construction process of deep underground spaces in soft soil and water-rich areas, it is often necessary to use horizontal grouting to construct horizontal water-stop curtains to establish water-resistant boundaries, improve the soil permeability coefficient, and strengthen the soil around the excavation surface, thereby Ensure safe construction and reduce the impact of the construction process on the surrounding env...

AI Technical Summary

Problems solved by technology

However, the grouting pipes installed in the previous stage are often not reused many times due to problems such as grouting pipe / hole clogging, and new pipes can only be driven into corresponding positions for grouting.

The existing grouting pipe not only wastes materials due to structural defects, but also greatly increases the workload, so that the grouting operation cannot be carried out in a timely and effective manner

The process of repeatedly driving new grouting pipes is actually a further damage to the water-stop curtain. In addition, the existing abandoned pipes have restrictions on the layout of the new grouting system, which makes the overall sealing effect of repeated plugging and grouting severely affected

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