Construction technology of straw concrete formwork-removing-free dense-rib laminated floor slab

A technology of superimposed floor slabs and construction technology, which is applied in the direction of floors, building components, buildings, etc., can solve the problems of complex formwork support and demolition process, poor thermal insulation and sound insulation effects, and high cost of formwork, so as to achieve vibration and compactness, improve The effect of pouring quality and construction site safety

Pending Publication Date: 2017-12-12
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary cast-in-place densely ribbed slabs have a large amount of formwork, complex formwork support and form removal process, high formwork cost, long construction period, poor thermal insulation and sound insulation effects, etc.

Method used

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  • Construction technology of straw concrete formwork-removing-free dense-rib laminated floor slab
  • Construction technology of straw concrete formwork-removing-free dense-rib laminated floor slab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First of all, ribbed bottom formwork 2 adopts a pair of L-shaped thin-walled steels that are symmetrical to each other, and the side walls are perforated. Paste a 3-5 mm thick sealing foam strip 12 on the rib beam bottom form 2 to prevent grout from leaking when pouring concrete. When the ribbed bottom formwork 2 is supported, the lower vertical support bar 3 should be tightly connected with the ribbed bottom formwork 2 through spring pads; after the ribbed bottom formwork is supported and reinforced, a crane is used to install and lay the demolition-free formwork 10 in sequence, The inner side of the reserved groove 11 of the non-demolition formwork 10 at both ends should be tightly bonded with the pre-attached sealing foam strip 12, and then the rib beam reinforcement cage is installed. The rib beam stirrups are composed of 5; after the rib beam reinforcement cage is in place and connected with the joints such as the reserved head 8 of the lower reinforcement of the n...

Embodiment 2

[0019] While the steel bars are being bound, a small vibrator 13 should be fixed on the vertical support bar 3 at the lower part of the platform; after the steel bar work is completed, the ribbed beam concrete 1 and the composite cast-in-place slab concrete 9 should be poured at the same time, and the concrete should be opened successively during pouring The small-scale vibrator 13 on the lower vertical support bar 3 vibrates to make the dense ribbed concrete 1 and the composite cast-in-place slab concrete 9 smooth and dense.

Embodiment 3

[0021] Open the small vibrator 13 in a certain order and time to vibrate the pumped concrete. After the rib beam bottom formwork 2 and the dismantling-free formwork 10 support are completed, the large-fluid concrete is poured sequentially and uniformly according to the direction determined by the construction plan from far to near by using a distribution machine, and the pouring speed and quantity of concrete are controlled by a special person. While the concrete is being poured, the small vibrator 13 fixed on the vertical support bar 3 at the lower part of the concrete is opened by a manual button or a remote control device. The on-site conditions are determined, about 1 to 3 minutes. After the concrete is level and dense, close the small vibrator 13, pour concrete backwards in turn, and open the small vibrator 13. When opening the small vibrator 13, attention should be paid to whether there is deformation or displacement in the lower vertical support bar 3, rib beam bottom ...

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Abstract

The invention provides a construction technology of a straw concrete formwork-removing-free dense-rib laminated floor slab. A floor bottom formwork is formed by combining a prefabricated straw lightweight aggregate concrete slab and a rib beam bottom formwork and used as a supporting base of a straw concrete removing-free formwork after concrete is poured, so that the straw concrete removing-free formwork is firm and reliable; through connecting of a vertical supporting rod spring cushion and the rib beam bottom formwork, a vibration exciter is fixed on a vertical supporting rod; and by controlling opening and closing of the vibration exciter, vibration of the vibration exciter is transmitted to the rib beam bottom formwork through the vertical supporting rod, vibration of the rib beam bottom formwork is transmitted to the straw concrete removing-free formwork, even and effective vibration of the whole floor slab is achieved, vibrating is more compact, damage to the straw concrete removing-free formwork caused by impact load and trampling of people on the slab on steel bar are avoided, a construction site is safer, and the pouring quality of concrete is improved.

Description

technical field [0001] The invention belongs to the technical field of building engineering construction, and in particular relates to a construction technique of a straw concrete formwork-free dense rib laminated floor slab. Background technique [0002] At present, there is a certain degree of application of densely ribbed floor slabs in China. Its characteristic is that the bottom formwork needs to be supported, and filling blocks are placed in the concrete structure to form a cavity to reduce its own weight. The research and application of densely ribbed floor slabs started earlier in foreign countries. The densely ribbed floor slabs formed by filling blocks with lightweight materials have been widely used in European and American countries. Since the 1970s in the UK, cast-in-place ribbed floors have been used in public buildings with large spaces and large spans. The filling blocks used in this type of floor include aerated concrete blocks, sintered clay hollow bricks,...

Claims

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Application Information

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IPC IPC(8): E04B5/38
CPCE04B5/38
Inventor 吕春刘杰郭国梁张道明王洪志杨楠张学元王蕊王丽张宇
Owner QIQIHAR UNIVERSITY
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