The construction technology and construction points adopt the construction method of one-time pouring forming of the wood mold on the site: the positioning plate assembled by the notched wooden board is used to connect the anchor bolt and the steel frame for initial positioning, and before the concrete is first set. After the second test, the exact position of the bolt is finally determined. Measuring the payout line According to the design drawing, calculate the spacing of any two bolts, and use the theodolite to guide the bolt cross reference control line (find the center or cross control point). Use the level gauge to guide the bolt elevation control line, and mark it with red paint on the periphery of the equipment to facilitate construction. The construction stakeout is based on the shape of the different foundations. According to the relationship between the anchor bolts according to the design drawings, the relationship between each bolt and the reference control line is determined and the construction sample is released. The positioning wood mold is now made of a diameter of 56mm, a length of 1600mm (exposed thread 600mm) bolts embedded in the cylindrical equipment as an example, processing positioning wood mold, the board thickness of 50mm. According to the large sample drawing on the wood mold, mark the reference control line and the bolt position line, give the specific position of each bolt, and mark the line. The groove is cut at the position of the designated bolt, each slot size is 2 mm larger than the bolt diameter, and the error of any two adjacent slots is not more than 2 mm, and the error of each diagonal is not more than 2 mm. Bolting fixes the bolt base and the base steel bar firmly. The bottom of the bolt is fixed with a horseshoe support; the upper and middle parts of the bolt are welded together with <20 steel bars to form a whole body, and the wire part is connected with the scaffolding inside the steel pipe. Use the reference control line and the elevation control line to review the elevation and elevation of each bolt position again. Use the line to check the bolt verticality. After the bolts are verified, the reinforcement begins. When reinforcing, it must be reinforced by two or four people at the same time. Adjust the position of the bolts in time and ensure that the plane of the bolts is evenly deformed. Apply the tarpaulin to the wire after the bolt is fixed in place to avoid contamination damage during the pouring process. When pouring the foundation concrete, it should be evenly cut, the vibration point should be evenly distributed, the vibrating rod should not touch the bolt, and the person in charge is responsible for the inspection. During the process of pouring concrete, arrange the special person to re-test the relative position and elevation of the bolt. If the displacement is large, stop the pouring immediately and continue to pour after repair. Before the bolt is accurately positioned, the final concrete can be re-tested. The full-time surveyor uses the water level meter to repeatedly measure the elevation no less than 3 times. Finally, the position of the bolt is accurately determined. The height of the embedded bolt allows the positive error to be less than 20mm. The center distance of the bolt is measured and the error is controlled within ±2 mm. Main tools and instruments Electric welders, chainsaws, concrete mixers, vibrating bars, electronic theodolites, level gauges, and other small tools. The materials used for the quality requirements must all meet the eligibility criteria, and the factory certificate of the materials is filed for reference. The positioning axis and elevation of the equipment foundation shall meet the design and specification requirements, as shown in Table 1. No burns can be formed on the bolts when spot welding is fixed. When pouring concrete, the vibrating bar is not allowed to touch the bolt to avoid displacement, and the position of the bolt and the precautions when the A1 cooling tower is arranged at any time. In order to fully utilize the function of the cooling tower, the following should be fully considered when arranging the cooling tower Points: 1) It should be placed in a place with good ventilation and weak influence of hot and humid air. 2) Avoid using it in places with a lot of dust and acid gas, otherwise it will cause corrosion of heat exchangers and piping. 3) Avoid use near heat sources, exhaust gases and flue gas vents. 4) The distance between the air inlet of the cooling tower and the obstacles such as walls and buildings should meet the ventilation requirements, and the influence of noise, drifting water, etc. on the building should also be considered. The installation process of the cooling tower 1) The foundation buried plate is leveled. In the leveling process of each buried board, it should be ensured that the base plates are at the same level. The mutual height difference of each base plate should be no more than 3mm, and it can be adjusted with steel pad when it exceeds. 2) Correction of steel components. The deformation of the steel component before installation should be corrected. 3) Connection and fastening. The penetration direction of the connecting bolts should be as consistent as possible; the bolts should be smoothly penetrated into the holes to avoid forced knocking; each bolt must be padded with two washers. The length of the exposed thread should be 4mm~6mm after tightening. 4) Installation of steel components. The installation of the cooling tower should first complete the installation of the steel components. The quality control effect adopts the above method, and the pre-embedded anchor bolt is constructed by using the shaping die to ensure the precise positioning of the bolt. The maximum error of the top level of the anchor bolt is only 3mm, which has achieved good construction quality, speeded up the construction progress, reduced the cost, saved the cost, and the production process is very simple.
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