Construction method for permeable ribbed multiple-arch tunnel

Abstract

The invention discloses a construction method for a permeable ribbed multiple-arch tunnel. The construction method specifically comprises the following steps: firstly reinforcing a vault slope with grouting steel tubes, and joining with anchor rods of a tunnel body system to form a continuous reinforced system; carrying out middle pilot heading excavation and then constructing an integral mid-partition; excavating tunnel chambers by adopting a procedure of a left tunnel first, and a right tunnel later; carrying out integral molding on a left tunnel ribbed arched beam with a vault longitudinal beam, an anticollision wall and an anticollision wall, and forming an annular force-bearing system with the mid-partition and an inverted arch; carrying out cyclic construction at an excavation progress being 12 to 14m according to a longitudinal construction spacing being 6 to 8m and a construction spacing of the left tunnel and the right tunnel being 30m. The construction method disclosed by the invention is a set of integral construction method aiming to the permeable ribbed multiple-arch tunnel; construction procedures, a supporting system and construction control parameters are adapted to the construction mechanical behavior time-space evolution regularity of the permeable ribbed multiple-arch tunnel, such that the safety of the construction process and the stability of a tunnel structure are effectively ensured, and a set of practical and operable construction technology is provided for promotion and application of the novel environment-friendly tunnel.

Description

technical field [0001] The invention belongs to the field of tunnel engineering, and more specifically relates to a construction method of a transparent ribbed multi-arch tunnel. Background technique [0002] China's mountains are vertical and horizontal, the terrain is steep and dangerous, and the geological conditions are complex. With the implementation of my country's western development strategy, the construction of high-grade highways in mountainous areas is being accelerated, and has become an important part of my country's infrastructure construction. Among them, mountain roads built along river valleys and valleys occupy a considerable proportion. [0003] The route of the road along the mountain is parallel to or obliquely intersected with the mountain slope. In the past, deep cutting schemes were often used. Due to the limitation of steep terrain conditions in mountainous areas, this solution often requires large-scale excavation of the mountain, which not only c...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects of the prior art, the purpose of the present invention is to provide a construction method for a transparent ribbed multi-arch tunnel, aiming at solving the problem of shallow buried unbalanced sections, and a ribbed multi-arch special-shaped tunnel with significant spatial structure characteristics, which can be used in construction. Tunnel Construction Stability Issues Under Conditions of Larger Excavation Surface and More Complex Construction Mechanics Behavior

Images