Anti-cracking sliding system for kiloton-grade concrete precast beam segments

A technology of concrete and prefabricated beams, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc. It can solve the problems of large spans of concrete beams, poor bearing capacity, and large deformation of fulcrums, so as to improve the overall construction quality and ensure the stability of transportation , the effect of preventing the danger of cracking
CN107090773AActive Publication Date: 2017-08-25CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP +1
4 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP
Publication Date
2017-08-25

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides an anti-cracking sliding system for kiloton-grade concrete precast beam segments, comprising a sliding device, support devices arranged on the sliding device side by side, and a traction device for adjusting the positions of the support devices; a support assembly comprises a pressure-bearing screw rod which is vertically arranged and a pressure-bearing nut which is screwed on the pressure-bearing screw rod, and a pressure detecting element is arranged between the lower end of the pressure-bearing nut and a support framework; a hydraulic jack which is used for butting the lower end of the pressure-bearing screw rod and can drive the pressure-bearing screw rod to move upward is arranged on a lower distribution beam; an upper distribution beam is arranged at the top end of the pressure-bearing screw rod, and a buffer block is arranged at the upper end of the upper distribution beam; and the sliding device comprises a sliding way, and sliding shoes are arranged on the sliding way. The anti-cracking sliding system provided by the invention ensures the transport stability of the concrete precast beam segments, effectively prevents the problems of posture change, uneven stress and the like of the concrete beam segments due to movement, and can effectively prevent the cracking danger of the kiloton-grade concrete precast beam segments.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of prefabricated construction of large concrete beam sections, and in particular relates to a system for preventing cracking and slippage of a thousand-ton concrete prefabricated beam section. Background technique

[0002] The side-span concrete girders of large-scale mixed girder cable-stayed bridges have large spans and large volumes. The "short-line method segmental prefabricated glue-joint technology" is used for construction, which can avoid quality problems such as hydration heat generated by the overall pouring of large-volume concrete, but thousands of tons The grade concrete prefabricated beam section has the characteristics of small transverse stiffness and heavy weight, so it is easy to cause the stress system of the concrete beam section to change during prefabrication and moving of the beam, resulting in local stress exceeding the standard, resulting in cracking of the concrete beam section. The...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More