Construction method of making frame piers at right angle for stew pipe culvert for bias holing

Abstract

The invention belongs to a construction method of making frame piers at right angle for a stew pipe culvert for bias holing. By means of the holing construction method, the digging direction of a holing face is basically parallel to the contour line of a hole mouth and obliquely crosses the axis of a tunnel, during holing digging, oblique cover arches are constructed by closely fitting the holingface in combination with the trend of a mountain body, steel arches are erected truss by truss in the direction parallel to the axis of the tunnel, and the constructing of the open cut tunnel and backfilling are performed outside the cover arches. By means of the construction method, the safe and smooth holing of the tunnel with good geological conditions and shallow-buried bias geological conditions can be ensured, the digging amount of the mountain body can be greatly reduced, the harmonious development concept of man and nature is sufficiently embodied, and the method has the advantages that the method is simple and practical, the construction cost is low, the construction cycle is short, safety and reliability are realized, and the quality can be controlled.

Description

technical field [0001] The invention belongs to an oblique positive construction method of bias pressure entry into a hole. Background technique [0002] In the process of highway construction, the route selection will inevitably pass through steep mountains. When tunnels are built at these positions, the opening of the tunnel is likely to be biased. In the prior art, when constructing a tunnel under biased pressure, for a steep entrance with good geological conditions, an oblique and orthogonal construction method is often used to reduce the excavation of side and uphill slopes. [0003] At present, there are two commonly used construction methods for tunnel arches: one is to use the method of erecting conventional steel arches with left and right dislocations, that is, the erection direction of the steel arches is 45° to the axis of the tunnel. ° ~ 60° angle installation, the steel arches on both sides are erected with the method of "dense outside and sparse inside", and ...

AI Technical Summary

Problems solved by technology

[0005] The oblique hole entry method is generally only suitable for steep hole entrances with good geological conditions, and the oblique hole entry method is generally not used for grade V hole sections with broken surrounding rocks and poor stability.

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