Formwork is a form for pouring concrete. It is a model for making a structure or a component into a wall. It is a reinforced concrete project and is an important part of it. The cost of the chessboard for the cast-in-situ steel bar mold holding soil structure accounts for 30% of the total cost of the lichen concrete project. The total labor amount is 30%. Therefore, the advanced formwork technology is adopted to speed up the construction speed and improve the quality of the lift-off project. Labor productivity, reducing engineering costs, and achieving civilized construction are all of great significance.

The design, side work and construction of the formwork shall comply with the “Technical Regulations for Concrete Structures of Separate Buildings” JGJ3.1186 on chessboard engineering, including the design, production and construction of combined formwork, large formwork, and sliding formwork, etc. It should still comply with the current standard "Technical Specification for Forming Steel Formwork" GB50214. "Structural Design of Large Chessboard Multi-storey Residential Buildings and Comparing Work Regulations N) JGJ20, (Technical Specification for Construction of A1 Pressure Clear Movable Formwork) GBJ113, (Safety of Hydraulic Sliding Formwork Construction) Technical ship) the corresponding regulations in JGJ65.

The formwork system is composed of chess board and supporting net. According to its different forms, the formwork can be divided into proud style chess board, fixed 9 chess board, Qingsheng mold rice, mobile formwork, table mold, etc.; according to different materials, it can be divided into wooden formwork, Steel formwork, plastic formwork, glass fiber reinforced plastic formwork, etc. The basic requirements for the formwork system are:

(1) Ensure that the size and mutual position of each part of the structure and components are correct.

(2) It has sufficient interception capacity, rigidity and stability. It can reliably bear the weight and lateral pressure of concrete. And the load generated during the construction process.

(3) Simple structure, convenient assembly and disassembly. And moisten the feet to facilitate the binding and installation of the ribs, and the pouring and maintenance of concrete.

(4) The seams of the chess board should be tight. No leakage. ,

Currently. In the cast-in-place reinforced concrete of high-rise buildings in our country. To simplify the installation and removal of the formwork. It saves chess board materials and speeds up the progress of the construction project. In the wall structure, the search method used in addition to the fixed V combination chess board, also uses a large number of tool-style chess boards. Such as hydraulic sliding proud, climbing formwork, big chess board, etc. Under construction. In addition to the stereotyped combination chess board, a series of tool-style formwork such as key-frame composite plywood formwork, Lijian formwork, table formwork, etc. are used with fast construction speed and good forming effect.