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Pouring device for long-span prestressed concrete shell with cylindrical inner wall

A concrete and prestressed technology, which is applied to unloading devices, roofs using flat/curved panels, buildings, etc., can solve the problems of not meeting the accuracy requirements of components, uneven thickness of concrete inner walls, and large diameter of roller shafts

Active Publication Date: 2021-09-14
常州市武进建筑设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the suspension roller method uses a large-span cylindrical shell plate, the calculation shows that when the span is greater than 12m, the diameter of the roller shaft is already very large, and its bending deformation will cause uneven thickness of the inner wall of the concrete, which cannot meet the precision requirements of the component

Method used

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  • Pouring device for long-span prestressed concrete shell with cylindrical inner wall
  • Pouring device for long-span prestressed concrete shell with cylindrical inner wall
  • Pouring device for long-span prestressed concrete shell with cylindrical inner wall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1~2 The inner wall shown is a cylindrical long-span prestressed concrete shell plate, with a curved flange plate 1, and a main rib 2 is provided at the center of the outer peripheral surface of the flange plate 1, and the main rib 2 is along the length direction of the flange plate 1 Setting, the flange plate 1 is a 1 / 3 circular arc plate; the cross section of the main rib 2 is trapezoidal, and the large end of the main rib 2 is connected with the flange plate 1; when the span of the flange plate 1 is <21m, the flange plate 1 Thickness h2 of end portion = central thickness h1 of flange plate 1 .

[0043] The inner steel strands 16 are concentratedly arranged in the main rib 2, and the inner steel strands 16 are under tension and the flange plate 1 is under compression, resisting the bending moment of the concrete shell.

[0044] Such as Figure 3-5 , Figures 9 to 11As shown, a pouring device for pouring the above-mentioned large-span prestressed conc...

Embodiment 2

[0056] The difference from Embodiment 1 is that when the span of the flange plate 1 is ≥ 21 m, the thickness h2 of the end of the flange plate 1 > the thickness h1 of the center of the flange plate 1 can prevent the upper end of the flange plate 1 from being unstable.

[0057] The side formwork unit in the pouring device is a square pipe with variable cross-section bent into an arc-shaped pipe, and the thickness h3 of the side formwork unit is consistent with the thickness direction of the flange plate.

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Abstract

The invention discloses a large-span prestressed concrete shell plate with a cylindrical inner wall and a casting device thereof. This kind of concrete shell plate has an arc-shaped flange plate, and a main rib is arranged at the center of the outer peripheral surface of the flange plate, and the main rib is arranged along the length direction of the flange plate, and the thickness of the end of the flange plate h2≥the center of the flange plate Thickness h1. This pouring device has a drum and a feeding device. The inner wall of the drum is provided with a groove and a separating steel plate. The separating steel plate is located in the middle of the two grooves. The ribbed bottom formwork is built in the groove; The device includes a screw conveying shaft, which is arranged at the bottom of the drum, and a driven shaft is located above the screw conveying shaft; the outer wall of the drum is provided with a driving device for driving the drum to rotate. The poured concrete shell plate of the invention has the advantages of reasonable stress, simple structure, convenient manufacture, strong durability and good economy. The pouring device of the invention has a high degree of mechanization, and the production efficiency is more than 10 times that of conventional production.

Description

technical field [0001] The invention relates to the technical field of concrete shell slabs and pouring, in particular to a pouring device for large-span prestressed concrete shell slabs whose inner walls are cylindrical. Background technique [0002] Traditional long-span concrete roofs generally use prefabricated prestressed concrete roof slabs with good economy, especially prefabricated double T slabs, prefabricated saddle slabs, and prefabricated goose-shaped slabs that combine slabs and beams. What they have in common is that ① using prefabricated components, factory production, assembly construction, easy quality control, fast construction speed, energy saving and water saving, in line with the national prefabricated building policy orientation. ② High-strength concrete and high-strength steel bars are used to save materials. ③ Plate and girder are integrated, easy to manufacture, less components, fast transportation and hoisting, good longitudinal rigidity, and large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04D3/26E04B1/342B28B1/20B28B11/24B28B13/06
CPCB28B1/20B28B11/245B28B13/06E04B1/342E04D3/26
Inventor 汤建峰王晓春
Owner 常州市武进建筑设计院有限公司
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