Quadrangular pyramid sphere net case falsework-free constructing and mounting method and hoisting machine tool
A technology without scaffolding and quadrangular cones, which is applied in the processing of building materials, construction, building construction, etc., can solve the problems of limited maximum hoisting height, heavy weight of a single ball or single rod, and high construction cost, so as to save erection Compared with disassembly time, shortened construction period, and simple assembly effect
Inactive Publication Date: 2009-04-22
ZHEJIANG UNIV +2
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Problems solved by technology
[0003] 1. Although the lifting capacity of cranes such as truck cranes, crawler cranes, and tower cranes can meet the requirements for hoisting parts such as balls and rods of reticulated shell structures, the maximum hoisting height is limited due to the restriction of the arm length of the crane itself. In addition, the bearing capacity of reinforced concrete slabs is often not enough to bear the weight of the crane, so for many engineering situations, the crane cannot enter the site to carry out hoisting construction operations
Therefore, the crane hoisting method cannot solve the problem of high clearance hoisting of components in the large-span reticulated shell structure
[0004] 2. For the case where the weight of a single ball or a single rod is too large to be transported and installed by manpower, the conventional high-altitude bulk method of erecting a full house of scaffolding cannot be installed. Component construction and installation issues
[0005] 3. For the case where a single ball and a single rod are light in weight and can be transported and installed by manpower, although the high-altitude bulk method can solve the problem of high clearance construction and installation of a large-span reticulated shell structure, the amount of scaffolding is huge
The cost of scaffolding purchase or rental, plus the cost of strengthening the foundation to solve the heavy weight of the scaffolding, the construction cost is very high
At the same time, the installation and disassembly time of the full hall scaffolding is often longer than the construction and installation time of the reticulated shell structure itself, which undoubtedly greatly prolongs the total construction period of the project.
Therefore, although the high-altitude bulk method is technically feasible, it is extremely unreasonable economically.
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[0037] Such as figure 1 Shown is a three-dimensional perspective view of the reticulated shell structure part of the present invention and its "one ball with four rods" assembly. In the figure, thick solid lines represent the meridional rods and weft rods of the upper chord layer, thick dashed lines represent the meridional rods and weft rods of the lower chord layer, and thin solid lines represent the web rods.
[0038] Such as figure 1 , image 3 As shown, the described components of the same composition: all include a ball 5 and four rods, the four rods are latitudinal rod a, lower warp rod b and two web rods c, d; each ball 5. The lower meridian bar b is respectively installed on the top, and the lower meridian bar b is the axis of symmetry, and the first web bar c and the second web bar d which form an angle with the symmetry axis of less than 90°-5°, and a Leftward or rightward latitudinal bar a, the extension line of four bar one ends all passes through the center of...
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The invention discloses a construction and installation method for a quadrangular pyramid spherical surface reticulated shell without a scaffold, and a hoisting tool. Firstly, component installation is performed on the ground, each component comprises a ball and four rods, then, a hoisting tool hoists the components, and being matched with hoisting emplacement, the construction installation of connecting the four rods with the four balls is performed manually at the emplacement position. By installing and overlapping circles one by one, the entire quadrangular pyramid spherical surface reticulated shell is constructed. The hoisting tool of the invention is a section steel support type button pole which comprises components of a piece of section steel, a button pole, two cable wind ropes provided with chains, a pulley, an winding engine, a steel cable and a plurality of bolts. The components are simple, portable and cheap, but the assembled hoisting tool can solve the problem of high clear mesh installation of heavy components of the quadrangular pyramid spherical surface reticulated shell. Compared with the traditional construction method, the method of the invention has the advantages of high construction efficiency, short construction period, convenient construction, high installation quality fine ratio, and low construction cost.
Description
technical field [0001] The invention relates to the construction of a large-span space reticulated shell structure, in particular to a scaffolding-free construction-type steel supporting hoisting tool for a quadrangular pyramidal spherical reticulated shell. Background technique [0002] Double-layer reticulated shell is a common type of large-span space structure, including upper chords, webs, lower chords, and ball joints connecting rods, mainly including quadrangular pyramids, triangular pyramids and other systems. For the reticulated shell structure with a clearance height of tens of meters or even hundreds of meters from the ground, there are great difficulties in construction. The reason is: [0003] 1. Although the lifting capacity of cranes such as truck cranes, crawler cranes, and tower cranes can meet the requirements for hoisting parts such as balls and rods of reticulated shell structures, the maximum hoisting height is limited by the arm length of the crane its...
Claims
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IPC IPC(8): E04G21/14
Inventor 卓新张国发楼道安蒋金生吴建挺齐宇
Owner ZHEJIANG UNIV