A pouring method of steel pipe concrete with protective layer

Abstract

The invention discloses a pouring method for a concrete-filled steel pipe with a protective layer. The pouring method is implemented by utilizing a separating unit. The separating unit comprises a separating device and a connecting piece. The separating device comprises an outer cylinder and an inner cylinder, a separating cavity is formed between the inner cylinder and the outer cylinder, and a first slurry outlet and a second slurry outlet which communicate with the lower portions of the inner cylinder and the separating cavity are formed in the lower portions of the inner cylinder and the separating cavity correspondingly. A separating net is arranged at the top of the inner cylinder, damping rails are arranged on the periphery of the upper side of the outer cylinder, and the upper endsof the damping rails are inwards bent to be provided with an upper connecting plate. A lower connecting plate is fixedly arranged on the position, corresponding to the upper connecting plate in the up-down direction, of the inner wall of the outer cylinder, and corresponding connecting holes are formed in the upper connecting plate and the lower connecting plate correspondingly. The connecting piece comprises a pump head clamping ring which is connected with a sliding ring through a plurality of connecting rods, the upper connecting plate is hung on the sliding ring, and a penetrating pin sequentially penetrates through the connecting holes in the upper connecting plate and the lower connecting plate from top to bottom, so that the connecting piece and the separating device are connectedtogether. The separating unit is additionally mounted on a pumping pipe, the inner side and the outer side are simultaneously constructed, and thus the construction period is shortened.

Description

technical field [0001] The invention belongs to the technical field of steel pipe concrete structures, and in particular relates to a pouring method of steel pipe concrete with a protective layer. Background technique [0002] Existing CFST can be roughly divided into CFST with a protective layer and CFST without a protective layer. However, in some special chemical environments and environments with high fire protection requirements, the application of CFST without a protective layer is limited to a certain extent. , Need to use concrete filled steel pipe with protective layer. In general, the outer concrete of the existing concrete-filled steel tube with a protective layer is relatively thick. When the protective layer and the inner part of the tube are poured at the same time, ordinary concrete can be vibrated and poured. However, in some occasions, only a thinner protective layer is required on the outside of the CFST. In this case, vibrating rods cannot be effectively ...

AI Technical Summary

Problems solved by technology

However, in some occasions, only a thinner protective layer is required on the outside of the steel pipe concrete. In this case, vibrating rods cannot be effectively used to vibrate, and self-compacting concrete must be used as the protective layer.

The outer side of the steel pipe is made of self-compacting concrete and the inner side is made of ordinary concrete and cannot be mixed. Therefore, the inner and outer sides of the steel pipe must be poured separately. The construction process is more troublesome, which prolongs the construction period and greatly reduces the construction efficiency.

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