Overall two-step lifting construction method of string tension prestressed steel structure network frame with hanging layer
A prestressed steel and steel structure technology, applied in the construction of the overall lifting, the overall two-step lifting construction field of the string prestressed steel structure grid, can solve the problem of long construction period, small construction site, no super large tonnage crane, etc. problems, to achieve the effect of reducing the difficulty of installation and construction, solving difficult guarantees, avoiding cost increases and quality problems
Active Publication Date: 2019-02-05
TIANJIN SANJIAN CONSTR ENG
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Problems solved by technology
This construction method solves the long construction period of the existing steel structure grid, the construction site is extremely narrow, and does not have the conditions for installation with a super-large tonnage crane, and at the same time avoids the construction problem of high-altitude welding after the second lifting of the hanging layer.
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[0040] A two-step overall lifting construction method for a tensioned prestressed steel structure network frame with a hanging layer. The construction steps include: 1) erecting a full scaffolding in the hollow area of the third-floor roof of the control center building; 2) setting 12 scaffolds on the overall platform. three) use MIDAS / GEN software to simulate and analyze the steel structure grid structure; four) assemble and weld the steel structure grid on the overall platform; The overall control is lifted in place in 2 steps; 6) one step is lifted to a suitable height to install the suspension layer and steel cables, the second step is lifted to the design level and then the post-repair rod installation is carried out; and 7) the final prestressed tension construction and Grading unloading;
[0041] One) to seven) construction steps, its concrete operation is as follows:
[0042] 1) Set up a full house of scaffolding in the hollow area of the roof on the third floor o...
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The invention discloses an overall two-step hoisting construction method of a string prestress steel structure grid structure with a hanging layer. The method is implemented in the following steps that firstly, a full-hall scaffold is erected in a hollow area of a three-layer roof of a control center building; secondly, 12 hoisting supports are arranged on an integral platform; thirdly, the grid structure is subjected to simulation analysis through MIDAS / GEN software; fourthly, a welding grid structure is spliced and welded on the integral platform; fifthly, in-place two-step hoisting is controlled as a whole through a computer by means of a hoisting hydraulic oil cylinder and a hoisting support; sixthly, first-step hoisting is conducted at a proper height to install the hanging layer and steel inhaul cables, and second-step hoisting is conducted to a designed elevation and then postcompensation rod elements are installed; seventhly, prestress tension construction and graded unloading are conducted in batches. The construction method solves the problems that existing grid structure construction period is long, a construction site is very narrow, conditions for standby super-tonnage crane installation do not exist, and meanwhile high-altitude welding construction after the second time hoisting of the hanging layer is avoided.
Description
technical field [0001] The invention relates to a construction method for overall lifting of a string-tensioned prestressed steel structure network frame, in particular to a two-step overall lifting construction method for a string-tensioned prestressed steel structure network frame with a hanging layer, which belongs to the technical field of construction engineering. Background technique [0002] In the field of architectural engineering technology, in the continuous development and application of space structures, especially space network structures, some space network structures with prestressed cables gradually show their superiority in spanning space and structural efficiency, and are gradually recognized and apply. Prestressed steel structures usually introduce high-strength cables into the steel structure and pre-stress the cables to change the internal force and deformation distribution of the traditional structure to offset the internal force and deformation under ...
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IPC IPC(8): E04G21/14
CPCE04G21/14
Inventor 张俊铎邓应平张永坡梁书新崔志海王岩李颖尚智
Owner TIANJIN SANJIAN CONSTR ENG