Construction procedure of environmental remediation fence project:
1, material approach and test
Ministry of materials and equipment, our company, is responsible for purchasing the blocks used in this project. In the procurement process, our project department will follow the following principles: high quality standards, no use of "three no products", inspection first, then entry, no national product certificate and unqualified products will not be used; In order to prevent the instability of masonry materials in different periods, batch sampling inspection is required in use; Cement, sand and masonry mortar for masonry shall be sampled and inspected as required;
2, masonry mortar, block vertical transportation height within 2 meters, available manual transportation. Horizontal transportation is carried to the construction site by manual cart.
3, ground beam, ring beam, constructional column template engineering
The formwork of ground beam and ring beam adopts steel formwork, and the support adopts φ48 steel pipe.
(1) template structure details shall be treated as follows:
A, the U-shaped card at the short-side joint between templates shall not be less than two buttons (the top angle is in the shape of an external figure), and the connection distance of the long-side U-shaped card shall not be greater than 300;
B, template and concrete contact surface before shuttering clean, full brush isolation agent.
C. Dismantling: Dismantle the side formwork, and dismantle the formwork under the condition that the surface and edges of the member can be guaranteed not to be damaged by demoulding. The dismantled formwork shall be inspected and repaired manually, the concrete slag on the surface shall be removed, the isolation agent shall be brushed, and then it shall be neatly stacked according to the general layout of construction before the next turnover.
(2) According to the Code for Construction and Acceptance of Concrete Structure Engineering (GB 50204-92), it has reached the excellent standard. The maximum joint width of formwork shall not be greater than 1.5mm, and the adhesive shall be cleaned and the release agent shall be brushed, and the area of each piece shall not be greater than 1000cm2. Axis displacement is not more than 5 mm, foundation section size is not more than plus or minus10 mm, and the surface height difference between two adjacent plates is 2 mm. ..
4. Masonry building
(1) Before masonry construction, level the surface of the ground beam with fine stone concrete according to the elevation, and then set out the axis of the wall according to the design drawings, erect the number of skin poles, so that the elevation lines of the wall, hollow window, lintel, ring beam and coping on the number of skin poles are located at the design elevation position;
(3) When bricklaying, pull the line first, and the mortar joint should be horizontal and vertical. The mortar plumpness of horizontal mortar joint is not less than 90%, and that of vertical mortar joint is not less than 60%. The horizontal mortar joint thickness and vertical mortar joint of masonry should be controlled at 8~ 12mm, and the embedded Rachel reinforcement should be set in the mortar layer;
(4) The wall and constructional column are provided with 2φ6 horizontal Rachel bars every 500mm along the wall height, and each side extends into the wall1m; ;
(5) The daily masonry height is < < 1.8m, and the bricks that have been laid shall not be moved, collided or loosened;
(6) In each layer or every 250m3 masonry, at least one set of test blocks shall be made for mortar of each strength grade;
5. The masonry height of this project is less than 2.5 meters, and the tool scaffold construction is fast, flexible and economical.
6. There are many kinds of hollowed-out windows on the fence with complicated patterns. In order to save the construction period, we can prefabricate all kinds of hollow window molds according to the construction drawing and add steel mesh concrete for prefabrication. When the wall is built to the elevation of the hollow window, we can install the hollow window with the first installation method. You can also find a prefabrication factory to process and make hollow windows. Quality inspection and evaluation of masonry engineering
According to Code for Construction and Acceptance of Masonry Engineering (GBJ 203-83), it reaches the excellent standard.
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