Corrugated steel-concrete combined support structure and method for constructing same

Abstract

The invention discloses a corrugated steel-concrete combined support structure and a method for constructing the same. The corrugated steel-concrete combined support structure comprises circular archcorrugated steel plates, straight wall corrugated steel plates, a reinforcing steel bar mesh and bases. The method includes sequentially connecting circular arch corrugated steel with straight wall corrugated steel by bolts, and pouring concrete bases at the ends of straight walls; forming grouting holes in the middles of various pieces of corrugated steel and pouring superfluid concrete between the grouting holes and surrounding rock. The corrugated steel-concrete combined support structure and the method have the advantages that the corrugated steel-concrete combined support structure is made of corrugated steel-concrete combined structures, and accordingly new tunnel support and damaged tunnel maintenance requirements can be met; diversified parameters such as the thicknesses of different types of corrugated steel plates and the sizes and the radian of unit sheets in the corrugated steel-concrete combined support structure can be adjusted according to particular engineering conditions, and accordingly the corrugated steel-concrete combined support structure and the method are high in applicability; the corrugated steel-concrete combined support structure can be constructed by means of prefabrication on external fields, reinforcing steel bar binding on sites can be omitted, accordingly, the labor intensity of workers can be relieved, the construction speeds can be increased,and the construction quality can be improved; tunnels can be quickly strengthened and maintained by the aid of the corrugated steel-concrete combined support structure, and the tunnel operation and maintenance costs can be reduced.

Description

technical field [0001] The invention relates to the field of tunnel lining support structures, in particular to a corrugated steel-concrete composite support structure and a construction method thereof, which is suitable for the support structure of full-section excavation of circular arch straight wall tunnels. Background technique [0002] Highway tunnels usually adopt a composite lining consisting of anchor rods and shotcrete-based flexible primary support combined with reinforced concrete rigid secondary lining, with the core idea of ​​making full use of the bearing capacity of the surrounding rock itself. [0003] Composite lining itself has many material problems such as large thickness, complicated construction, high requirements for construction machinery, and poor crack resistance. At the same time, highway tunnels have large cross-sections, various lining structures, and large uncertainties in geological conditions. They are also prone to irregular construction, re...

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Problems solved by technology

[0004] The present invention aims at the problems of large lining structure thickness, poor integrity, and slow construction speed in the prior art, and provides a lining structure with fast construction speed, good mechanical properties, and low operation and maintenance costs, which is suitable for the support of new tunnels and the maintenance of diseased tunnels. Corrugated steel-concrete composite support structure and its construction method

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