A construction method of high-altitude and large-span cast-in-situ multi-arch aqueduct support formwork system

Abstract

The invention relates to a construction method of a high altitude long span cast-in-place multi-arch aqueduct supporting die system, which mainly comprises following steps: 1) constructing a foundation and a pier platform; 2) constructing a platform; 3) setting up a steel support; 4) setting up a military beam; 5) setting up a bowl buckle type scaffold; 6) adjusting the level position of the supporting die system; 7) adjusting elevation of the supporting die system; and 8) constructing aqueduct concrete. According to the invention, the construction method has the characteristics of less steel material usage, continuous operation of the aqueduct construction, the lack of demolition and restoration of the original supporting die system between the aqueduct constructions in each section and high intensity of each joint connection; and the construction method has the advantages of fast construction speed, good construction effect and obvious technology and economy benefits.

Description

technical field [0001] The invention relates to a construction method for a support formwork system, in particular to a construction method for a support formwork system for a high-altitude large-span cast-in-situ multi-arch aqueduct. Background technique [0002] The aqueduct is an overhead water conveyance structure that conveys the water flow across the canal, road, mountain rush, valley mouth, etc. It is one of the most widely used intersecting buildings in the canal system. performance, low cost, has been widely used. With the needs of the society, the current arch aqueduct is developing in the direction of large-span arches. For the construction of long-span multi-arch aqueducts, aqueduct formwork support is the most difficult problem in construction. At present, the supporting formwork system for long-span multi-arch aqueducts is mainly to build full-scale scaffolding or use a combination of steel brackets and scaffolding. These supporting membrane systems A large n...

AI Technical Summary

Problems solved by technology

For the construction of long-span multi-arch aqueducts, aqueduct formwork support is the most difficult problem in construction. At present, the supporting formwork system for long-span multi-arch aqueducts is mainly to build full-scale scaffolding or use a combination of steel brackets and scaffolding. These supporting membrane systems A large number of scaffolding and steel supports are often used, the rental cost is high, the formwork system is erected and dismantled, and the construction period is long, and the elevation of the aqueduct formwork is difficult to control, etc.

[0003] In order to adapt to the construction of large-span multi-arch aqueducts, speed up the erection and dismantling of the support formwork system, and facilitate the concrete construction of the aqueduct, some technologically advanced support formwork systems have appeared, such as "Quick-installed formwork support system" (authorized announcement number CN201991222U ), the support formwork system speeds up the erection to a certain extent, but when the support formwork system is used in large-span multi-arch aqueducts, it still needs to use a large amount of steel; another example is "a movable scaffolding bowl buckle fastener and Its operation method" (publication number: CN104264976A), through the innovation of the bowl buckle parts, it can be connected with the crossbar at any position of the scaffolding pole, which is convenient for the removal of the support formwork system, but for the construction of the multi-arch aqueduct, the support formwork system The amount of construction is still very large, and the control of the elevation cannot be realized; another example is "A Construction Device for Sweeping Rod Sleeves of Bowl-Button Steel Scaffolding Scaffolding" (public number: CN103015697A), by setting the bottom plate of the adjustable base and the adjustment nut at the bottom of the system , to achieve accurate control of the elevation of the support formwork system, but the system cannot achieve horizontal position movement, and a large number of scaffolds are still required

[0004] To sum up, the existing supporting formwork system for double-arch aqueducts has achieved a more precise control of the formwork elevation, which speeds up the erection and dismantling of the supporting formwork system to a certain extent, but there is still room for improvement, mainly reflected in the amount of steel used large, unable to realize the overall horizontal displacement of the support formwork system, etc.

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