Large-span prestressed concrete shell plate with cylindrical inner wall and pouring device thereof
A large-span, pre-stressed technology, applied in unloading devices, buildings, building structures, etc., can solve the problems of uneven thickness of concrete inner wall, unable to meet the requirements of component accuracy, large diameter of roller shaft, etc., to reduce mold investment, High stiffness and good integrity
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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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