Multi-passage concrete trolley for weak surrounding rock tunnel benching stepping method construction

Abstract

The invention relates to concrete jetting equipment, in particular to a multi-passage concrete trolley for weak surrounding rock tunnel benching stepping method construction, which solves the problem that conventional various concrete trolleys cannot satisfy the requirement of weak surrounding rock multi-step tunnel construction, and comprises a vehicle body, a folding telescopic arm frame, a concrete delivery pump, at least three rapid setting admixture delivery pipes and at least three high pressure wind delivery pipes, wherein a multi-passage distributor is arranged at the outlet of a concrete delivery hard pipe, the structure of the multi-passage distributor is composed of a main passage, tributary passages and high pressure wind branch pipes; a lengthening concrete delivery hose I and a lengthening concrete delivery hose II are connected with the outlet of each tributary passage, the connection parts of each lightening concrete delivery hose I and each lightening concrete delivery hose II are communicated with the corresponding rapid setting admixture delivery pipes, and a straight-pipe type jet head is mounted at the outlet of each lightening concrete delivery hose II. The trolley is simple in structure, is excellent in maneuvering characteristic, is convenient to operate and maintain, reduces jetting bounce rate, improves the efficiency, is low in cost, and satisfies the supporting requirement of weak surrounding rock multi-step tunnel construction initial stage.

Description

Technical field [0001] The invention relates to a concrete spraying equipment, in particular to a multi-channel concrete trolley used for the step method construction of a soft surrounding rock tunnel. Background technique [0002] With the development of high-speed railway and expressway technology, the proportion of long and large tunnels in newly-built railway roads has gradually increased. In order to ensure the rapid, safe and high-quality construction of long and large tunnels, higher requirements are put forward for the initial support of the tunnel, and mechanization is adopted. Shotcrete has become a trend in the development of shotcrete technology. At the same time, shotcrete machinery is developing in the direction of high efficiency, safety, environmental protection, practicality and automation. At present, there are two main methods for wet spraying construction of the initial supporting concrete of the tunnel: one is to use a small wet spraying machine for operation...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing various concrete spraying equipment cannot meet the construction requirements of multi-step tunnels with weak surrounding rocks, the present invention provides a multi-channel concrete trolley for the construction of tunnels with weak surrounding rocks by step method

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