2, the construction technology
(1) hole cleaning: use a broom to clean the floating ash and loose slag around the hole.
(2) Hole drilling: Before concrete pouring, use a steel chisel or electric pick to rough the hole side wall.
(3) Supporting bottom formwork: The bottom formwork for plugging the reserved pipe holes in this project should be supported by steel pipes and adjustable supports, and steel wire hanging formwork is not suitable.
(4) Cleaning and brushing cement slurry: Before concrete pouring, clean the hole with clear water and brush plain cement slurry on the side wall of the hole.
(5) Pre-pouring concrete: Micro-expansive concrete which is12 thicker than structural concrete is used, inserted and compacted. After pouring, pay attention to maintenance and turn off the water, and check whether there is leakage.
(6) Secondary pouring of concrete: slightly expansive concrete one level higher than structural concrete is poured at a height of 20 meters away from the board surface and compacted. Pay attention to maintenance and water collection after pouring, and check whether there is leakage.
(7) Ointment caulking: use hot building ointment for caulking, pay attention to the protection of finished products, and check for leakage. ?
Extended data:
As soon as the pre-reserved hole hanging formwork was put into the market, it was convenient and practical, and the actual economic benefits brought to the construction and installation contractors were quickly welcomed and affirmed by the construction and building materials markets and the vast number of construction contractors!
As soon as the pre-reserved hole hanging formwork was put into the market, it was convenient and practical, and the actual economic benefits brought to the construction and installation contractors were quickly welcomed and affirmed by the construction and building materials markets and the vast number of construction contractors!
In recent years, China's urban and rural capital construction and real estate development have shown a straight upward trend. In order to reduce production costs, improve work efficiency, improve construction quality and progress, and enhance their own market competitiveness, many construction and installation enterprises are eager to seek new construction technologies and supporting products to replace old and rough construction methods.
In order to save labor and material costs, improve construction quality and speed up construction progress. According to the statistics of the construction department, the number of projects under construction in provincial capital cities has remained above 5,000 all the year round, the number of projects under construction in prefecture-level cities is around 2,500, and the number of projects under construction in counties and cities is around 1 10,000.
Take a building with 15 floors and 4 units as an example. On average, each household 10 reserved holes (one kitchen and one bathroom). The reserved hole to be blocked in this project is about 1200, and the market demand is huge. The annual demand of a prefecture-level city is more than one million sets of reserved holes.