A semi-rigid integral seamless bridge structure supported by steel sheet piles and its construction method

Abstract

The invention relates to a semi-rigid-joint integral seamless bridge structure supported by a steel plate pile and a construction method. The semi-rigid-joint integral seamless bridge structure supported by the steel plate pile comprises an end beam, a pile cap, an anchoring rod, and a steel plate pile body which is inserted into the earth surface to be used as a supporting pile; a weak shaft of the steel plate pile body is bent and connected with the anchoring rod; a web of the steel plate pile is connected with the pile cap and the end beam, and foamed rubber fills in a joint of the pile cap and the end beam to form a semi-rigid-joint structure; the steel plate pile can be directly inserted into the soil, so that the construction is convenient, and the disturbance to the soil can be reduced; in addition, the horizontal temperature deformation of the bridge can be absorbed well according to the characteristic of low lateral rigidity; the anchoring rod is arranged to avoid excessive horizontal displacement of the steel plate pile as well as preventing bulging; more important is that the longitudinal deformation capacity of the bridge is improved through the semi-rigid connection structure between the pile body and the end beam, thus the pile foundation is avoided excessive lateral displacement, the vertical bearing capacity of the pile is ensured, the stress of the whole bridge abutment is reduced, the damage of temperature deformation of the bridge to the pile body can be reduced, and as a result, the service life of the bridge is prolonged.

Description

technical field [0001] The invention relates to a semi-rigid integral seamless bridge structure supported by steel sheet piles and a construction method, belonging to the field of bridges. Background technique [0002] Integral bridge is the most widely used type of seamless bridge. Since the expansion and contraction devices and supports are cancelled, the abutment and the main girder are made into an integral structure, and the expansion and contraction of the overall bridge superstructure must be constrained by the abutment. The abutment body is generally a rigid structure, mainly reinforced concrete structure, which must bear the vertical load and self-weight transmitted by the main girder, and also bear the effect of earth pressure behind the abutment. Therefore, compared with ordinary bridges, the stress on the abutment of the bridge and the deformation of the soil behind the abutment will become very unfavorable. [0003] Due to the small deformation capacity of the...

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Problems solved by technology

However, its lateral displacement should not be too large, so as not to cause damage to the pile body and affect the vertical bearing capacity of the pile body

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