Device used for grouting reinforcement from interior of shield tunneling machine to peripheral stratum

Abstract

The invention relates to a device used for grouting reinforcement from the interior of a shield tunneling machine to a peripheral stratum. A steel casing pipe is stricken into the stratum in front of a reserved hole through the reserved hole in a shield body of the shield tunneling machine, and a perforated steel grouting pipe connected in the steel casing pipe is used for carrying out grouting reinforcement on the peripheral rock stratum of the shield body. Meanwhile, the peripheral stratum within different ranges can be reinforced through perforated steel grouting pipes with different lengths, and thus the purposes of carrying out grouting reinforcement from the interior of the shield tunneling machine to the peripheral stratum, controlling the settlement deformation of the stratum, performing supporting, and reducing shield trapping and construction safety risks are achieved. While the stratum is reinforced through grouting, a water closing ring and a backflow-prevention rubber pad are adopted, it can be effectively prevented that grout flows back into the shield tunneling machine body in the grouting process, and it is ensured that construction is safe and environmentally friendly.

Description

technical field [0001] The invention relates to a reinforcement device for a shield section, in particular to a reinforcement device for grouting from the inside of the shield machine to surrounding formations. Background technique [0002] Since the introduction of shield tunneling technology in my country's rail transit in the late 1990s, the shield tunneling method has been more and more applied to my country's rail transit construction because of its advantages of high mechanization, safety, reliability and fast construction speed. . Shield construction technology has been used in the field of rail transit in my country for nearly 20 years, and many shield construction methods have formed standardized construction methods; however, with the development of urban space, more and more external constraints have emerged in shield construction, such as The delay in the construction of facilities (underground stations or receiving wells) has resulted in the unavoidable stagnatio...

AI Technical Summary

Problems solved by technology

Shield construction technology has been used in the field of rail transit in my country for nearly 20 years, and many shield construction methods have formed standardized construction methods; however, with the development of urban space, more and more external constraints have emerged in shield construction, such as The delay in the construction of facilities (underground stations or receiving shafts) has resulted in the unavoidable stagnation of the shield machine at an unfavorable position in the shield section, and it is becoming more and more common to wait for the shield machine to arrive after the completion of the construction of the receiving facility; Waiting, the deformation of the formation during the stress release process fills the original expanded excavation space and directly wraps the shield body, resulting in the trapping of the shield machine and greatly increasing the safety risk when resuming excavation

[0003] At present, domestic engineers and technicians have proposed treatment methods, such as the use of stratum cross-section grouting to improve the characteristics of the stratum to achieve the purpose of strengthening the stratum; Due to the limitation of the construction environment above, it is difficult to carry out grouting reinforcement on the ground

The other is to use the patent No. CN103573274B "Soft Soil Foundation Shield Tunnel Settlement Control Steel Casing Grouting Reinforcement Device" to carry out stratum reinforcement to control stratum deformation, but it only focuses on stratum disturbance. The post-grouting reinforcement of the shield segment does not involve the advance reinforcement during the shield tunneling before the formation disturbance and the formation reinforcement during the stagnation period.

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