Before the processing of the steel bar, the technicians first enlarge the sample, and after processing, draw the overlapping position and the anchoring position with red paint, and classify them. The ring-shaped rebar of the chamber is φ18 rebar, the lap length is 42d or 750mm, the longitudinal rebar is φ16 rebar, the lap length is 26d or 500mm; the anchor length of the ring and longitudinal reinforcement is 30d, ie the length is 540 mm respectively. And 480mm; the spacing of the annular bars is 250mm, the spacing of the longitudinal bars is 330mm, and the thickness of the protective layer of the steel bars is 50mm. When the steel bars are tied, they are tied with double strands. Each joint must be tied in place and must not be leaked. Banding steel arch front portion, first with setting up the scaffolding platforms, scaffolding layer spacing of no more than 2m, the operating table with a large paved plate 50mm thick, stable and secure both ends of the large iron plate lashing wire. 2, stable mold wall According to the construction plan, the construction part must be cast at the same time according to the designed construction part to ensure the integrity of the pouring. Pump Room civil use metal assembly template. Before the wall is built, the chamber tires are installed and reinforced, and the tires are processed by [20 channel steel (with abortion processing map). The order of installation of the abortion is from south to north, that is, from the construction of the pump house to the direction of the passage. The installation of the template must take into account the beam and steel beams reserved for the design of the pump house. When the beam is reserved, the beam and socket are fixed with bolts or steel bars to ensure that the beam and socket are not deformed during the casting process; when the steel beam is reserved First, the concrete is poured to the reserved height, and then the steel beam is placed in the reserved position, and then the wall is stabilized. 3, ç ¼ pouring The pumping room is constructed by using civil engineering metal formwork and pouring from the bottom to the upper vertical mold to enhance vibration and ensure the quality of the project. 3.1, ç ¼ (1) Design intensity The strength of the cast-in-place concrete is C25, and the anchor spray, cable trench and floor raft are C20. (2) Design thickness The thickness of the main body of the pump house is 500mm, the thickness of the pumping station is 300mm, and the thickness of the wall is 350mm and 250mm. (3) Materials Cement: P.O32.5 ordinary Portland cement. Stone: It uses hard gravel with a particle size of 20~40mm. Sand: Medium coarse sand is used, and the impurity content of the soil shall not exceed the design requirements. 3.2 Pouring ç ¼ The raw materials required for pouring concrete are from the auxiliary wellhead, cement, yellow sand and stone are placed at the northernmost end of the pump house, that is, the 10m roadway at the north end of the pump house is used as a temporary material yard. The mixer and concrete pump are determined according to the actual situation on site. Location for quick mixing and ashing. The pouring is carried out in one unit, because the pump house main body and the alcove have a large number of steel beam embedded parts and beam nests, so the position of the embedded parts should be closely paid attention to during the pouring process. At the same time, in the process of concrete pouring, the concrete should be evenly shocked. The vibrating rod must be spared and can be replaced at any time when there is a problem with the vibrating rod. Quality requirements 1. Conscientiously implement the ISO-9002 quality system standards, improve the quality responsibility system of all levels of personnel in accordance with the "Quality Manual" and "Quality System Standards" of our company, and strictly follow each of the requirements of ISO-9002. Comprehensively promote quality management. 2, the construction plan, do a good job in the preparation of technology, materials, etc., all personnel involved in the construction must carry out organizational design and construction measures. 3. The surveyor must first check the wellbore centerline and the wellbore crosshairs, and then lead the wellbore crosshairs and elevation points to the wellbore within 10m above the top of the chamber, and fix it. 4. Any raw materials that constitute the engineering entity such as anchors, anchor cables, indigenous products, cement, etc., must be fully documented and used before being used. 5, in strict accordance with the blasting chart, drilling and shooting, to ensure the size, if there is under-excavation must be removed with the wind to ensure the thickness of the irrigation. 6, the size of the abortion processing meets the design requirements, the template must not be deformed, and the oil is wiped before pouring. 7. According to the construction of the middle waist line, there must be no obvious connection between the templates. It is strictly forbidden to appear honeycomb, pockmark, dog hole and running mode. 8. Strictly according to the mix ratio, watering should be symmetrically poured. The thickness of the layered watering shall not exceed 250mm, and the vibrating shall be strengthened until a layer of grout appears on the surface. The strength of the concrete must be watered and compacted according to the design requirements, and must be poured once. 9. Each process must be self-inspected and cross-checked, and the concealed project shall be promptly notified to Party A and the supervisor for timely inspection. 10. The two layers of the joint must be filled and tapped. 11. Immediately after demolishing the mold, the beam box will be removed, and the calibration will be carried out in time, and the unqualified timely rectification will be carried out. Safety Precautions 1, strictly enforce the "Coal Mine Safety Regulations" and the safe production responsibility system. 2. Strictly implement the engineering management system of a project-one measure, and carefully carry out safety technology disclosure to all staff members and strictly implement them. 3, the use of pre-class safety education for employees, the assessment of various types of work, holding a certificate, not allowed to go to work. 4. The gunner must be a full-time gunner with a certificate. 5. The medicine must be processed at a safe place outside the wellhead. Use a wooden or bamboo awl to drill a detonator-sized hole in the center of the medicine roll. After the detonator is inserted into the medicine roll, tighten the tube with the foot line. 6. The gunners shall charge, connect, and shoot according to the blasting instructions, and adjust the blasthole arrangement, charge structure and charge amount according to the blasting effect. 7. Before charging, you must use the eye-sweeping device to remove the rock powder in the blasthole, and then push the medicine roll gently with the gun stick. When charging, prevent the drilling layer from rubbing the insulation layer of the detonator foot line, causing the detonator to short-circuit. . 8. Before using the gun cable, you must use the continuity meter to check whether it is turned on and short-circuit after firing. All power must be stopped in the wellbore before the firing bar is connected to the disconnect switch. The firing key is not managed by the gun. 9. Work equipment before shooting, the tools should be evacuated from the work surface. The personnel will be evacuated to the outside of the wellhead, and the manhole cover door will be opened and the gunner will operate to shoot the gun. 10. Strictly implement the "one shot three inspections" and "three people interlocking" gun system. 11. After at least 15 minutes of ventilation, the guns will be diluted and blown away. The signal workers, the gunners and the squad leader will go down to the inspection. 12. It was found that the rifle was strictly handled in accordance with the 315 of the Regulations. Due to the poor connection, the gun could be re-wired; the equal blasthole should be played at least 0.3m from the rifle, and the charge should be detonated. 13. When handling the rifle, it must be carried out under the direct guidance of the team leader. It should be completed on the shift. If the shift is not completed, it must be handed over to the staff on the spot. 14. After the shot is fired, the gunpowder will be blown away, and the long-steel will be used to find the floating and dangerous rock in the lane wall before other work can be carried out. 15. The scaffolding must be erected. The operator must use the belt and firmly root when working on the console on the scaffold. 16. The buckets containing the materials shall not be taken by people. It is strictly forbidden to use the bottom-loading buckets to lift and lower personnel. 17, the meteorite does not need to be overfilled, the coefficient is 0.9. 18. There must be no one in the operating range of the machine. 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Pump house watering technology safety measures
1, steel banding