I. Basic Code of Conduct for Operators 1. All construction personnel must receive safety education, training and disclosure before entering the construction site. 2. Before entering the construction site, you must wear labor protection articles such as safety helmet correctly, otherwise you may not enter the construction site. 3, all construction personnel must dress neatly when entering the construction site, it is forbidden to shirtless, barefoot, wearing slippers, and so on and so forth. 4. When working above 2m (including 2m), if there are no reliable safety protection railings and other facilities around the operating point, you must wear your seat belt correctly and fasten it on a solid structure before you can start working at height. 5, it is forbidden to throw down from a height or throw materials from a place to a height. 6, more than six (including six) strong winds and heavy rain, heavy snow, foggy weather must stop open-air operations. After rain, snow and winter, water, snow, frost and ice must be removed in open-air operations, and anti-skid measures must be taken. Take heatstroke prevention and cooling measures in summer. 7. It is forbidden to work after drinking. 8, it is forbidden to fight in the construction site, fighting phenomenon. 9. If unsafe factors or safety accidents are found in the construction process, it must be reported to the project leader or site management personnel in time, and at the same time, the operation should be stopped and the dangerous area should be evacuated. No adventure. Two. T-beam 1 hoisting and beam storage technology, gantry crane hoisting and beam storage technology 2. Preparation for hoisting and storing beams 2. 1 Gantry crane with hanging beam should be maintained and repaired in time, and the beam should be hung at any time. 2.2 The crane driver must receive safety training to ensure the safety of "person", "machine" and "beam" during lifting, and illegal operation is strictly prohibited. 2.3 Conduct safety inspection before hoisting to ensure that there are no potential safety hazards. 3. Hoisting and moving the beam 3. 1 Precast beam is prefabricated in the beam-making area of the beam yard. When the concrete strength of the beam reaches the design strength, tensioning and grouting can be carried out before the beam can be moved and stored. 3.2 The hoisting equipment adopts two 80T gantry cranes, which are hoisted in the beam-making area and then moved to the beam storage area. 3.3 When lifting on the prefabricated base of T-beam, pay attention to that the wire rope should be straight and tidy when threading, and there should be no squeezing or bending, so as to avoid the wire rope being squeezed due to uneven stress. 3.4 Set special iron shoes at the contact between the bottom of the beam and the lifting rope to isolate the concrete at the bottom of the beam from the wire rope, so as not to crush the concrete or cut the wire rope. 3.5 The hanging beam shall be made of alternately twisted steel wire rope, and the safety factor of lifting steel wire rope shall reach 10 times. 3.6 After lifting for 20 ~ 30cm, check whether there are any abnormal changes in each part. After confirming that the situation is good and there are no obstacles and hanging objects, the lifting can be continued. The height difference between the front and back of the beam shall not exceed 2%, and the lifting point position shall not be greater than 1.0m from the beam end. 3.7 In case of abnormal phenomena such as kink, deformation, broken wire and corrosion, the wire rope shall be reduced or scrapped in time. Scrapped wire ropes should be clearly marked to prevent their use. 4, gantry crane walking gantry crane walking track should be solid, smooth, no triangle pit, gantry crane should walk slowly. The operator shall give a unified password, and the driver shall operate according to the commander's signal. The gantry crane shall be guarded by special personnel, with at least two iron shoes and triangular wood on both sides. The operation area needs to be guarded and protected, and other idle personnel are not allowed to enter the operation area. 5. The stored beams should be stored in a planned way according to the number, so that the beams can be taken when erecting beams. Secure storage brackets are arranged at both ends of the beam, so that the beam can be stored in a simply supported state. It is forbidden to put the beam directly on the ground to avoid cracks or even fractures due to uneven ground and stress on the upper part of the beam. Both sides of each cross beam are supported by square wood inclined legs. Do a good job of drainage in the beam storage area to prevent the pedestal from sinking due to surface water scouring the beam storage area. 5. 1 The single-layer precast beam is transported from the beam-making area to the beam storage area by gantry crane and placed on the beam storage pedestal. The surveyors are required to preliminarily measure the top surface of the beam storage pedestal in advance, and the beam bottom is supported by wooden boards. When the beam is stored, the beam fulcrum is basically the same as the design beam fulcrum, so as to avoid the camber caused by too long hanging length. 5.2 Double-layer storage beam Double-layer storage beam has higher standard requirements for foundation treatment. In order to ensure the safety of double-layer stored beams, the beam yard should take the following measures to ensure the safety of beams. (1) Before saving beams, determine the order of saving beams according to the order of saving beams on the abutment. According to the actual number of single-layer beams stored in the beam yard, it is considered that the post-frame beam section should be prefabricated first and then the beam storage plan should be arranged. (2) After the storage beam of the first floor is placed stably, the drainage transverse slope (such as 2% transverse drainage slope) on the top surface of T-beam in bridge deck design shall be leveled with thin boards, and then the supporting blocks (pre-processed thick boards can be used, and the thickness shall ensure that the hanging rope can be freely taken out or penetrated; Precast reinforced concrete blocks can also be used; Do not use test blocks or stones with different thicknesses) to ensure that the center lines of the second floor beam and the lower floor beam coincide, and the cantilever lengths of the beam ends are the same. The surveyors are required to conduct preliminary survey on the supporting points of the planned double-layer storage beam in advance, and make records to ensure that the elevation difference of the lower existing beam on the same plane is less than 2mm. (3) Unified command requires the gantry driver to run at a constant speed under the command of the commander. When the T-beam falls on the support block with low speed, a slight load will be observed on the gantry. (4) During the first double-layer storage, after the beam is dropped, the surveyors are arranged to observe the supporting points of the stored beam again, and observe the compression of the bearing, foundation load, bearing deformation, foundation cracking and displacement, and so on. After standing for 30 minutes, the gantry can be completely unloaded without danger. ⑤ To ensure the storage stability of the T-beam, after the gantry is completely unloaded, add Ф150 mm logs to the bottom of the partition at the end of the T-beam and the lower beam at the root of the upper flange of the beam, and fix them with triangular wood. ⑥ Commanders should use walkie-talkies to accurately contact the operating drivers, and the signals sent must be clear, accurate and simple to ensure the safety of hoisting. ⑦ For T-beams stored on the second floor, at least two Ф 25 steel bars shall be welded on the transverse plates at the ends of adjacent T-beams to ensure the stability and safety of the beams. Cut the weld again when hoisting. ⑧ When the edge beam is stored on the outermost side of the first floor, the edge beam should not be stored on the middle beam or on the edge beam of the diaphragm and its different sides. Three. Security matters 1. Precast beam hoisting, delivery, transportation, storage and installation operations must pay attention to safety, seriousness, safety and reliability, and unified operation and command. 2. The gantry crane shall be lifted by a full-time driver, and its weight shall not exceed the limit specified by the crane, and it shall be operated in strict accordance with the equipment manual. Before lifting the beam, overhaul the crane, spreader and other lifting equipment. The lifting brake fails, the crane and spreader parts are damaged, and the wire rope is damaged (broken or twisted). Repairs should be made before lifting. 3, in the process of lifting, should pay attention to the monitoring of hoist and braking mechanism, to prevent wire rope job-hopping and braking failure. During the walking process of the beam lifter, it is also necessary to observe whether there are obstacles and things that damage the wheel and rail on the running track and eliminate them in time. 4, in any case, it is forbidden to fly with a hook, it is forbidden to stand under heavy lifting.

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