A hydraulic rock-soil milling equipment and method for weak surrounding rock tunnels

Abstract

The invention belongs to hydraulic rock-soil milling and excavating equipment and a hydraulic rock-soil milling and excavating method for a tunnel in soft and weak surrounding rock. Milling and excavating equipment with a soil moving device is adopted to excavate, and a funnel operating surface is divided into six operation regions which are subjected to operating in sequence through the method. The milling and excavating equipment comprises a hydraulic excavator body, a milling and excavating head and a milling and excavating moveable arm, wherein the soil moving device is arranged on the milling and excavating moveable arm at the rear end of the milling and excavating head; the soil moving device comprises an soil bearing hopper, a load bearing arm, a regulating hydraulic press, a bucket hydraulic press and a connecting base. The hydraulic rock-soil milling and excavating equipment can be used for effectively guaranteeing tunnel construction and operation safety and reducing economic loss caused by geological disasters in construction of the tunnel in soft and weak surrounding rock, and has the advantages of being low in construction resource and cost, easy to construct, high in construction speed, small in safety risk and high in construction quality.

Description

technical field [0001] The invention belongs to a hydraulic rock-soil milling method and equipment for tunnels with weak surrounding rocks. Background technique [0002] At present, in the excavation and construction of highway and railway tunnels, the mechanical excavation method and the blasting method are generally used, that is, excavation by excavators and blasting are completed by manual drilling of blastholes; although these two methods are the most commonly used, But there are bigger safety and quality hidden dangers. [0003] Mechanical excavation is mostly used in geological construction areas where the surrounding rock of the tunnel is relatively soft. During construction, excavators are usually used to dig out the surrounding rock first, then withdraw from the working surface, stop under the side wall of the tunnel, and the loader enters to start slag removal. After the slag removal, the supporting structure is installed and sprayed on the tunnel wall immediatel...

AI Technical Summary

Problems solved by technology

The blasting method has relatively strict requirements on personnel and environmental conditions, but both methods are likely to cause deviations in the control of tunnel excavation

[0005] In particular, the construction site belongs to the landform of denuded hills and mountains, with large topography undulations, well-developed joints, many fissures, a large amount of laterite with pumice, boulders, and many layers, and the soil-rock interface with mud and black mudstone are distributed irregularly. The above two methods are difficult to apply to surrounding rock formations with medium and low hardness that have a great impact on stability

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