Construction method for reinforcing circular structures by pre-tensioned high-strength fiber cloth
A high-strength fiber and construction method technology, applied in bridge reinforcement, building maintenance, bridge maintenance, etc., can solve the problems of complex prestressing methods, unsatisfactory clamping effects, and high requirements for construction personnel, and achieve controllable and fast application process Convenient reinforcement and low cost effect
Inactive Publication Date: 2012-12-12
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0004] However, when high-strength fiber cloth is used as reinforcement for engineering structures, the anchorage is subject to high stress, and the interlayer shear strength is borne by weaker resins, so the reinforcement effect is restricted by the anchorage device
However, there are still few reliable and mature anchorage devices on the market at present, and the clamping effect is often not ideal, which is not convenient for general promotion in engineering structures.
Moreover, in the project, the previous construction methods had problems such as many operation steps, high requirements for construction personnel, complex and immature prestressing methods, etc.
Method used
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[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] The invention can not only be used for emergency rapid reinforcement of circular structures (components), such as rapid post-earthquake reinforcement of bridge piers, but also for permanent reinforcement, such as maintenance and reconstruction projects. During reinforcement, one anchor head 1 is respectively fixed at both ends of the high-strength fiber cloth, and then the high-strength fiber cloth 4 is wrapped around the outer surface of the member 3 to be reinforced, and then the two anchor heads 1 are fixed by the cooperative installation of the screw rod 5 and the nut 6 , to apply prestress by tightening the nut 6, such as figure 1 shown. The structure of anchor head 1 is as follows figure 2 As shown, the end section...
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The invention discloses a construction method for reinforcing circular structures by pre-tensioned high-strength fiber cloth, which is used for reinforcing the circular structures such as a cylindrical bin, a water tower, a cooling tower, a chimney, a gas storage tank, an oil storage tank and the like or circular concrete structural members such as a pressed circular pier, a circular column and the like. The method comprises the following steps of: cutting high-strength fiber cloth; connecting the cut high-strength fiber cloth and assorted anchor heads; sleeving the high-strength fiber cloth to which the anchor heads are connected at the preset position of the structures to be reinforced; allowing a screw to pass through the anchor heads at both ends of the high-strength fiber cloth, and screwing a nut on the screw; and applying pre-tensioned stress on the high-strength fiber cloth to reach preset design stress, and locking the nut. The method can be used for reinforcing the circular structures quickly under emergent condition, and also can be used for reinforcing the circular structures permanently. In the method, the practicability is high, and the application process of prestress is controllable and easy, so that safety storage is enough while the utilization rate of material strength is high.
Description
technical field [0001] The invention relates to a method for reinforcing or reinforcing circular structures (members) with high-strength composite materials, in particular to a method for reinforcing silos, water towers, cooling towers, chimneys, gas storage tanks and oil storage tanks by pre-tensioning high-strength fiber cloth Construction methods for circular structures, or circular concrete members such as compressed circular piers and columns. Background technique [0002] The category of circular structures (components) includes such as silos, water towers, cooling towers, chimneys, gas storage tanks, oil storage tanks, and pressurized circular piers, columns, etc. Under the internal pressure of thin-walled circular sections such as silos, the outer wall is subjected to a large tensile force on any radial section including the axis of the circular ring; under the action of axial pressure, the cross-sectional There is a tendency to increase uniformly. Therefore, the o...
Claims
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IPC IPC(8): E04G23/02E01D22/00
Inventor 周长东厉春龙李季白晓彬田腾
Owner BEIJING JIAOTONG UNIV