Before pouring concrete, pre-apply the butter on the top thread of the anchor bolt, wrap it with plastic cloth or other soft materials, and cover it with a cement bag to prevent it from being stained or damaged. When pouring concrete, pay attention to controlling the speed of concrete rise, so that both sides rise evenly. When the root of the bolt is poured, the concrete should be vibrated and dense and then spread to the surrounding. At the same time, the concrete outside the anchor plate should be slightly higher, and then carefully inserted into the concrete. Press the bottom of the anchor plate until there is concrete slurry around the edge of the anchor plate. It is important to emphasize that the vibrating bar is prohibited from touching the bolt body during pouring. During the concrete pouring process, the theodolite should be erected after the foundation pit is qualified, and the concrete can be poured. Before the elevation is introduced to the formwork, the casting height can be accurately and accurately grasped. When the concrete is poured to a design height of 15Om from the bottom of the anchor bolt. , the base surface is fully vibrated and the pouring is temporarily stopped. The bolt set is fixed and the upper concrete is poured to fix the steel bar. The bottom height of the anchor bolt is accurately measured to the inside of the template and the six vertical ribs in the direction of the basic axis. The hoop and the vertical rib are used to divide the upper and lower layers in the horizontal direction, and the three external pre-44-+ Ningxia mechanical outer axes are used or utilized. The gantry plate pull line, check the position of the bolts in the construction at any time; if there is displacement, it is necessary to adjust the No. 8 galvanized steel wire with the winch or use the raft and the wooden wedge top plate to ensure the position of the bolt group is correct.
When the concrete pouring strength reaches 50% or more, the No. 8 wire of the upper plate of the fixing bolt set is cut off, and the upper plate is gently picked up and taken out, and can be reused. The application effect is sufficient due to the preparation work, and the construction method is correct. Finally, all the independent foundations of the Shapotou zip line are covered with 120 anchor bolts. The spacing of each group of bolts is controlled in the soil Zmm, and the elevation is controlled by +NINGR NINGXIAJIXIE technology. Within the communication, the design requirements are fully met. The anchor bolts for fixing the whole pouring foundation by the above method have been applied in the foundation construction of the Shahu cableway (64), the Shapotou cableway (52), and the Shaanxi Guanshan zipline (140), all of which have achieved satisfactory results. A certain amount of construction experience has been accumulated. Matters needing attention Before the foundation concrete is poured, it is necessary to fully prepare the work to shorten the time of fixing the bolts in the middle, so as to try to carry out the foundation upper pouring work before the initial concrete of the bottom concrete to avoid the construction joints, because the zip line (rope) is mainly used. It is beneficial to withstand a large horizontal force without leaving the construction joint to the integrity of the foundation and to ensure the shear resistance of the foundation. Scale formation process: In the research of water treatment technology, it mainly analyzes from crystallization, deposition, baking, corrosion, compounding and polymerization, microorganisms, etc. In actual work, the first consideration is crystallization and deposition. There may be only one kind of salt, and there are often various salt crystals. Because of the inverse temperature-dissolving phenomenon of ca, 'M-expansion' salt and the corrosive products are deposited together, it is finally divided into two layers, that is, the inner layer is iron oxide. The outer layer is a layer of calcium and magnesium salts.
The cooling water used by our company is provided by an independent circulating water supply system. The return water is in the form of a trench and a cover plate. The powdered powder, phosphating slag and other oil impurities in the drawing process are easily immersed in the water through the gap of the cover plate. The water quality in the circulatory system is seriously deteriorated, causing the scaling to accelerate, and such scales have more complex components, higher strength and bonding ability than ordinary scales, and are not easily removed like ordinary scales. There is data showing that the scale on the inner wall of the reel increases by 0.01 mm, and the amount of heat dissipated on the surface of the reel will decrease by about 5%. For this reason, it can be considered that the cause of the problem 1 is the accumulation of scale. The mechanism for forming the circumferential deposition of water tumors at the inner and outer reel outlets is similar to the above. It is considered that the reason why the outer reel and the inner reel correspond to the working surface is that the water has a certain pressure and volume in the working area. When the cylinder is working, the two are always moving to each other. The slight scaling will be removed by this movement and pressure, and the movement and pressure are not available in the water outlet and the circumferential direction, so the scale becomes thicker and thicker and affects the outer volume. Disassembly of the barrel.
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