铝合金模板由于材质原因预留洞的固定没有象木模板容易，但不固定无法保证预

The aluminum alloy formwork is not as easy to fix as the wooden formwork due to material reasons, but the fixed position cannot guarantee the precise position of the reserved formwork. The following methods are used in current engineering practice: <br>wire box, wire tube fixing and positioning: due to the aluminum alloy formwork It is not possible to fix the wire box with nails on the template at random by the usual methods. Now, after precise positioning on the first layer of standard aluminum mold, the electric box is used to drill holes, and the wire box is fixed with an expansion cap; it is also impossible for the water pipe opening to be embedded in the casing Without nail fixing, the screw holes are drilled at the opening of the water pipe, the cover plates are preset on the upper and lower sides of the aluminum alloy plate, and the screw is used to fix, that is, after the embedded pipe is positioned, the two wooden cover plates are squeezed tightly ( The bottom of the embedded pipe is filled with concrete blocks with a ring to prevent the casing from shifting), which is easy to remove afterwards. The first positioning of the line box and the line tube is accurate, and the upper position can be consistent

Aluminum alloy template due to material reasons reserved hole fixed is not easy like wood template, but not fixed can not guarantee the exact location of reserved hole template, the current engineering practice using the following methods:<br>Line box, line pipe fixing and positioning: because the aluminum alloy template can not be used the usual method to randomly fix the nail line box on the template, now the first layer of standard layer aluminum mold on the precise positioning, the use of electric drill drilling, the online box with expansion cap fixed; Squeeze the two wooden cover plates with screw (the bottom of the pre-buried tube is filled with a ringed crucible to prevent the sleeve from shifting), which is easy to remove afterwards. Line box and line tube first positioning accurate, upper positioning can be achieved consistent

Due to the material reasons, aluminum alloy formwork is not as easy to fix the reserved holes as wood formwork, but it can not guarantee the exact position of the reserved holes formwork without fixing. The following methods are adopted in the current engineering practice:<br>Fixing and positioning of wire box and wire pipe: since the aluminum alloy formwork cannot be fixed by nails on the formwork at will with the usual method, now after the accurate positioning on the first layer of standard layer aluminum formwork, drill holes with electric drill, and fix the wire box with expansion cap; For the embedded casing part of the water pipe hole, it is also impossible to fix it without nails. Now, screw holes are drilled at the water pipe hole, cover plates are preset at the upper and lower sides of the aluminum alloy plate, and fixed with screws, that is, after positioning the embedded pipe, two wooden cover plates are squeezed with screws (the inner bottom of the embedded pipe is filled with concrete blocks with rings to prevent the displacement of the casing), which is convenient for removal afterwards. The first positioning of wire box and tube is accurate, and the upper positioning can be consistent<br>