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A hinged conversion type externally prestressed concrete tower and its construction method

A technology of external prestressing and concrete, which is applied in the direction of towers, special data processing applications, building types, etc., and can solve the cracking of ordinary prestressed concrete towers, uneven stress distribution, material costs and transportation costs of external prestressed concrete towers Problems such as high hoisting costs on the project site can achieve the effect of improving the quality and reliability of project construction, simplifying the construction process, and reducing the difficulty of construction implementation

Active Publication Date: 2018-09-18
CHINA AVIATION PLANNING & DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hinged conversion type external prestressed concrete tower and its construction method, which solves the problem of the uneven stress distribution of the ordinary prestressed concrete tower under the ring beam in the prestressed anchorage area in the prior art, which is easy to cause ordinary prestressed concrete towers. The technical problem of vertical cracking of the concrete tower; and solve the problem of high material cost, transportation cost and high hoisting cost of the externally prestressed concrete tower

Method used

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  • A hinged conversion type externally prestressed concrete tower and its construction method
  • A hinged conversion type externally prestressed concrete tower and its construction method
  • A hinged conversion type externally prestressed concrete tower and its construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example as figure 1 Shown:

[0035] A hinged conversion type external prestressed concrete tower, comprising an ordinary prestressed concrete tower 3 and an external prestressed beam 6 arranged close to its inner wall surface, and a prestressed anchorage area is set on the upper end surface of the ordinary prestressed concrete tower 3 Ring beam 2, a steel tower 1 is set on the upper surface of the ring beam 2 in the prestressed anchorage area; a torsional deformation buffer support 4 is arranged between the ring beam 2 in the prestressed anchorage area and the ordinary prestressed concrete tower 3, and the torsion-resistant The deformation buffer bearings 4 are evenly and closely arranged in the circular section at the upper end of the ordinary prestressed concrete tower 3, and the anti-torsion deformation buffer bearings 4 are flat rubber bearings or spherical hinge steel bearings, or other pressure-bearing and The bearing that releases the rotation constraint, the fl...

Embodiment 2

[0036] Example two such as figure 2 Shown:

[0037] The difference between Embodiment 2 and Embodiment 1 is that the ring beam 2 in the prestressed anchorage area is a ring-shaped special-shaped steel box girder 8, and the longitudinal section of the ring-shaped special-shaped steel box girder 8 is a structure with a narrow top and a wide bottom, and the width of its lower end surface is Not less than the width of the upper end surface of the ordinary prestressed concrete tower 3 , the ring beam 2 in the prestressed anchorage area is fixed to the steel tower 1 by welding the flange 5 fixed at the bottom of the steel tower 1 .

Embodiment 3

[0038] Embodiment three such as image 3 Shown:

[0039] The difference between the third embodiment and the second embodiment is that: the steel box girder 8 is filled with concrete 9 inside the ring-shaped special-shaped steel box girder.

[0040] The present invention also includes the construction method of the above-mentioned hinged conversion type external prestressed concrete tower, which is characterized in that it includes the following steps:

[0041] Step 1. Carry out the overall finite element numerical simulation calculation: according to the preliminarily selected prestressed anchorage area ring beam 2 section and the preliminarily selected spherical hinge steel support to establish the overall combination of external prestressed concrete and steel tower 1) wind power tower model, and input the load conditions of the wind power tower, and carry out the overall finite element numerical simulation calculation;

[0042] Step 2. Determine the specifications of each p...

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PUM

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Abstract

The invention provides a hinge joint conversion type external prestressed concrete tower and a construction method thereof. The hinge joint conversion type external prestressed concrete tower comprises a common prestressed concrete tower barrel and an external prestressed strand arranged tightly attached to the inner wall face of the common prestressed concrete tower barrel. A prestressed anchoring region annular beam is arranged on the upper end face of the common prestressed concrete tower barrel. A steel tower barrel is arranged on the upper end face of the prestressed anchoring region annular beam. An anti-torsion-deformation buffering support is arranged between the prestressed anchoring region annular beam and the common prestressed concrete tower barrel. The prestressed anchoring region annular beam and the steel tower barrel are connected through a flange fixed to the bottom of the steel tower barrel. The external prestressed strand penetrates the prestressed anchoring region annular beam and the flange from bottom to top and then is fixed through an anchorage device. By the adoption of the hinge joint conversion type external prestressed concrete tower, the common prestressed concrete tower barrel at the lower portion can only bear the vertical pressure transmitted by the prestressed anchoring region annular beam, the possibility that the common prestressed concrete tower barrel at the lower portion vertically cracks under the effect of the eccentric prestress of an anchoring region is eliminated, and potential safety hazards of an external prestressed concrete wind power tower are eliminated.

Description

technical field [0001] The invention relates to a wind power tower, in particular to a hinged conversion type externally prestressed concrete tower and a construction method thereof. Background technique [0002] Since the external prestressed beams of the externally prestressed concrete tower are arranged inside the wall of the concrete tower, when the external prestressed beams are in the prestressed anchorage area where the concrete and the steel cylinder meet, there must be a relative force produced by the external prestress. Due to the eccentric torsional moment of the concrete tower tube section, the eccentric bending moment causes the section torsion of the ring beam in the prestressed anchorage area along the periphery of the concrete tower tube to the inner side of the tube wall. This torsional deformation leads to a large annular distribution of tensile stress on the outside of the concrete tower wall near the lower part of the ring beam in the prestressed anchorag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04H12/16G06F17/50
CPCE04H12/16G06F30/23
Inventor 张曼生葛家琪张国军王树
Owner CHINA AVIATION PLANNING & DESIGN INST GRP
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