Construction requirements of pouring concrete shaft lining
1. The height of wooden formwork shall not exceed 1. 2m, the thickness of each plate should not be less than 50mm, and the width should not be greater than150 mm; ; One side of the formwork near the concrete shall be leveled, and both sides and ends shall be smooth.
2. The height of assembled steel formwork shall not exceed 1. 2m, and the thickness of steel plate should not be less than 3.5mm The position of connecting bolt holes should ensure that any two templates can be connected with each other up, down, left and right. Formwork shall have sufficient rigidity.
3. The overall mobile steel formwork height should be 2 ~ 5m, and the steel plate thickness should meet the rigidity requirements; When the formwork is hung on the ground stable car or under the hanging plate, its hanging points shall not be less than 3.
Zhong Da consulting industry dynamic column answers all the questions you don't understand. Welcome to click to view.
4. The overall slip form height should be 1.2 ~ 1.4m, and the steel plate thickness should not be less than 3.5mm；; Taper should be 0.6% ~ 65438 0.0%; Be rigid enough.
5. After the template is assembled, its outer diameter should be greater than the designed net radius of the shaft 10 ~ 40mm, and the upper and lower surfaces should be horizontal with an allowable error of 40mm; Reuse templates should be thoroughly checked and reformed.
6. The water cement ratio and slump of concrete should be strictly controlled according to the construction design, and the admixture should comply with the construction design.
7. Reinforced concrete shaft wall, ground reinforcement should be bound or welded, underground vertical reinforcement should be bound at the bottom of each section, and its joint position is allowed to be on the same plane.
8. Concrete pouring should be carried out symmetrically in layers, and mechanical vibration must be adopted. When using slip form, the thickness of layered casting should be 0. 3 ~ 0.4m, and the sliding distance should not exceed th.
9. When demoulding, the concrete strength should be 0. 05-0. 25mpa when using sliding formwork. When short section excavation is adopted, it should be 0.7 ~1.ompa; When using other templates, it should not be less than 1.OMPa.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd