Windproof construction device for high bridge pier

Abstract

The invention discloses a windproof construction device with high bridge piers. The device comprises an inner mould board (3) and an outer mould board (2), wherein the inner mould board (3) and the outer mould board (2) are arranged on the inner side and the outer side of a steel reinforcement cage (5) on a pier stud carrying table (1), and the windproof construction device with the high bridge piers is characterized in that the outer mould board (2) is 1.3-1.8m higher than the inner mould board (3); and the inner side of the inner mould board (3) and the outer side of the outer mould board (2) are fixedly connected with windproof trusses. When in construction of the bridge piers under severe weather at high wind velocity, the device can enable the pouring quality of concrete and the strength of the bridge piers is high; and furthermore, the structure is simple, the construction is easy and the cost is low.

Description

technical field [0001] The invention relates to a bridge construction device, in particular to a windproof construction device for high bridge piers under high wind speed. Background technique [0002] Most of the high piers are in the form of elliptical (ring) hollow piers. The usual construction method is: place a cylindrical double-layer steel reinforcement cage on the pier cap, and set inner and outer support formworks of equal height inside and outside the cylindrical steel cage, so as to carry out construction in the surrounding lining. Concrete pouring. Due to the poor integrity of the assembled formwork, it may be deformed or even collapsed under the action of strong winds. In addition, due to height constraints, the pouring construction of its high piers generally cannot be completed at one time, so it must be poured in sections. This segmented construction method, in case of severe weather conditions with high wind speed, after the construction of a segment is c...

AI Technical Summary

Problems solved by technology

Both of these two windproof methods have the following disadvantages: 1. The setting of the windshield requires pre-embedded connectors on the pier body. If the treatment is not in place after completion, it is easy to have a certain impact on the shape of the pier

3. Adding a maintenance structure outside the outer support formwork of the pier increases the amount of construction work and prolongs the construction period; and if the ring-shaped windshield is set to surround the entire construction site of the pier, the construction operations are all carried out within the windproof maintenance structure. There are also shortcomings such as inconvenient transportation of construction materials, increasing the difficulty of construction, increasing the conveying height and distance of the concrete pump, increasing the power of the pump, and increasing the cost of construction.

However, due to the limited rigidity and number of elongated bolts, in the case of high piers, the side pressure of the pier wall due to the self-weight and expansion of the concrete may still occur when pouring concrete, which will lead to the instability of the formwork and the occurrence of mold expansion and grout leakage Etc., affect the quality of poured concrete; cause the pier to shift and twist, the surface of the pier body will produce grooves, staggered platforms, and the pier body will change slopes, reducing the strength of the pier and affecting the quality of the pier

And after pouring in this way, the PPC holes reserved on the pier will affect the appearance, and the holes need to be refilled, which prolongs the construction period

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