External tension preloading construction method of long-span transition steel truss
A construction method and steel truss technology, applied in the processing of building materials, construction, building structure, etc., can solve the problems of difficult safe operation, large amount of construction measures, and labor-intensive, etc., to achieve simple and easy operation, solve problems Interface cracks, cleverly conceived effects
Active Publication Date: 2021-10-19
SHANGHAI BAOYE GRP NANJING BUILDING +1
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] At present, the method of applying external prestressing is usually used to solve the deformation of large-span conversion trusses. The traditional external preloading methods are currently mostly preloading heavy objects such as sandbags and concrete blocks. This method requires complicated procedures and consumes more labor. The amount of construction measures is large, and the safety operation is difficult
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.
[0031] As shown in the figure, the external tension preloading construction method of the large-span transition steel truss according to the present invention includes the following steps:
[0032] 1. When the conversion steel truss 11 is assembled in sections at high altitude, a steel pipe support tire frame 1 is erected on its lower string;
[0033] 2. Insert the bottom of t...
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 PUM
Login to View More Abstract
The invention discloses a construction method for external tensioning and preloading of a large-span conversion steel truss. The large-span conversion truss is used to assemble and support the tire frame to double as a preloading function. After the truss is assembled, the support mode is converted to the pre-loading mode: the support mode: The steel pipe structure is used as the truss assembly to support the tire frame, and the elevation of the support point is controlled and adjusted by lifting the corbels of the tire frame column feet through hydraulic jacks. Preloading mode: Change the position of the core jack to the top of the corbel of the tire frame column foot to become a hydraulic synchronous tensioning device, set the ground anchor at the foot of the tire frame column, and preload the truss through the steel strand. The invention is ingenious in conception, simple in operation, safe and stable, controls the size of support force and preload through oil pressure, and accurately controls displacement through travel sensor, so as to ensure that the state after the construction of the converted steel truss is consistent with the design state. It has a broad application prospect in the preloading construction supported by long-span steel trusses.
Description
technical field [0001] The invention belongs to the technical field of steel structure engineering construction, and in particular relates to an external tension preloading construction method of a large-span conversion steel truss. Background technique [0002] In recent years, high-rise and super high-rise buildings have developed rapidly. As a form of transfer floor, transfer steel trusses are suitable for building multi-story long-span structures due to their light weight, simple construction, good ductility and seismic performance. Under the large load on the upper part, the transfer steel truss will inevitably undergo downward deflection deformation, resulting in a decrease in the effective support length at the end of the truss, an increase in the local compressive stress, and a decrease in the bearing capacity of the truss. crack. By preloading the steel truss with reasonable arching and eliminating the arching, the arching effect of the plate can be used to conveni...
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 Application Information
Patent Timeline
Login to View More Patent Type & AuthorityPatents(China)
IPC IPC(8): E04G21/12E04B1/342
CPCE04B1/342E04G21/12E04G21/121
Inventor陈辉蔡峰张海堂马骁陈柯冰王雷傅龙丽
OwnerSHANGHAI BAOYE GRP NANJING BUILDING