Billboard placed on the steps
Single-column billboard construction plan and pre cautions
Single-column billboard is a common outdoor advertising media Display platform, also known as Optimus Prime advertising, there are many other advertising display media such as anti-aircraft guns, three-sided flips, road flag advertising, etc. According to different advertising planning plans, different advertising display media are selected. The following is the construction process of the single-column billboard construction plan.
1. Foundation construction: Construction process sequence 1. Laying out lines 2. Foundation pit excavation 3. Earth transportation 4. Precipitation 5. Foundation pit enclosure 6. Edge protection 7. Foundation treatment 8. Basement Processing 9. Cushion concrete construction 10. Laying out lines 11. Axis acceptance 12. Steel bar binding 13. Acceptance 14. Formwork support 15. Acceptance 16. Concrete pouring 17. Maintenance 18. Backfill
A. Excavation Preliminary pre paration work for pits: Preliminary pre paration work (① Party A will do the "three connections and one leveling" and greening transplantation work on site; ② Collect the location data of the existing underground pipe network to avoid damage to it; ③ Party B's workers and machinery Enter the construction site and work with Party A to formulate the working area; ④ Position and set out the axis, and use lime to draw the edge of the foundation pit (trough) excavation according to the positioning;
B. Site excavation:
1. The construction site of this project has convenient transportation and is open. Excavation by excavator is mainly accompanied by manual clearing;
2. Earthwork placement and excess earth transportation;
3 . The construction site is open. During the excavation of the foundation pit, it is necessary to slope the excavation at the initial 2-2.6 meter elevation stage to pre vent safety accidents caused by soil wall collapse.
4. Key points in excavation construction. Follow the steps of starting from deep to shallow and proceeding horizontally from top to bottom. First, dig out the filling soil to verify the depth, then dig down the silt to the clay layer to measure the elevation. If the depth is not reached below the groundwater level, it does not reach the silt layer and the depth is not reached. When the level reaches 3600MM and further digging is required, temporary drainage ditches or water collection wells should be dug around or on both sides of the foundation pit (trough) to reduce the water level to below 500MM at the bottom of the pit to facilitate the dewatering work until the foundation construction is completed. .
5. Completion acceptance of the foundation pit (trough)
C. Concrete foundation construction:
1. The foundation section adopts a step shape, and the step height is greater than 300MM (see drawing for details), first clean the bottom of the tank, and then add 300MM gravel cushion material;
2. Put out the foundation axis and edge lines on the foundation cushion, and the steel bar workers will tie the foundation steel bars. Correct the position of the overlapping steel bars with ground bolts and fix them, and inspect the steel bars.
3. After the steel bars pass the inspection, support the pre -pre pared formwork according to the lines (the formwork is mainly made of light weight and small floor space. Laminated plywood, made and installed on site. Steel pipe frame or angle steel welding support.) Support the lower formwork first, and then support the upper formwork. The formwork must be supported firmly to avoid slurry and deformation of the wooden formwork. Water and moisten.
4. Use C20 commercial concrete to transport the concrete directly to the pit, and the concrete worker will vibrate the concrete tightly with a vibrator to avoid leakage.
5. After the concrete is poured, water it for curing and when it reaches a certain strength, remove the formwork, inspect it, and backfill it with soil.
6. After the foundation pit is completed, clean the ground bolt threads on the exposed ground and add engine oil. Wrap them in plastic bags to pre vent damage to the wire openings. Prefabricated components such as ground bolts, wall protection facilities, and flanges must be completed before excavation of the foundation pit. Materials, components, construction machinery, and labor should all meet construction requirements.
2. Construction of steel columns:
The steel columns are welded off-site and dragged to the site, followed by crane lifting.
The spiral pipe steel columns were put on site for pre liminary iron-red anti-corrosion, and the flange angle plates and connected hollow round steel plates were welded to the spiral pipe steel columns. After welding, the weld coating was removed and anti-corrosion was performed, totaling 2 all over. The spiral tube steel columns are sprayed with topcoat two days before lifting. To ensure that the paint surface of the spiral tube steel column is clean.
3. Welding of the card surface and supporting steel beams:
The card surface adopts a combination solution of on-site welding and crane lifting.
1. The card surface materials are brought in for anti-corrosion, blanking, grouping and welding of the card surfaces and supporting cross arms.
2. The crane supports the steel frame of the sign, the support cross arms, and the center column of the sign, and positions, combines, and welds the steel structure of the sign's steel frame, the support cross arms, and the center column of the sign.
3. After the combined welding of the brand steel structure is completed, check and remove the weld coating to pre vent corrosion and leaks.
4. The steel structure of the brand surface is finished with galvanized sheets. The spacing between rivets is 20CM. Install the galvanized sheet so that the long side of the galvanized sheet is vertically downward to ensure that the completed galvanized sheet is smooth and beautiful.
5. The foundation, columns, signboard steel structure, and installation of galvanized sheets on the signboard steel structure have all been completed and have been accepted in writing.
Installation pre cautions:
1. Post hoisting. When hoisting the column, attention should be paid to the accurate alignment of the wire during the drop suspension to ensure that the wire is not bitten. After the hanging is in place, the closing and tightening of the thread should be carried out evenly to ensure that the tightening of the thread is in place. Then close the second nut tightly.
2. Hoisting of the steel structure of the sign. When hoisting the steel structure of the card surface, attention should be paid to firm lifting points and even and parallel rise. Rise to a certain height and lower evenly to the slightly upper end of the column connection. Ground personnel will coordinate to align the connection points and lower the crane accurately. After the crane is in place, the ground personnel will adjust the position of the billboard. At the end of the fixed point, the welding personnel will mount the upper end of the column to perform welding operations. Weld firmly and lift. The crane evacuated and the welding workers strengthened the welding joints. Other staff members clean up the work site. Welding operation, site cleanup, completion. Professional staff will conduct a completion review of the completed billboards.
"The Last Penny"
A poor old man, standing in the cold open air In the air, looking into the glass of a store. His boots were dirty and torn, and his thin coat could not withstand the wind and snow blowing towards him. However, a kind smile hung on his frozen face.
There are many people in the store. This is the best place in town, and everyone knows that the desserts and pastries at this shop are outstanding. But today is different from usual, because in the window of the store, another huge billboard was hung, which read:
Try our new apple cake, anyone can try it, it is free.
Many people came to try the new cake. The boss is very trustworthy. Anyone who enters his store will definitely take away one or even two boxes of desserts when they leave. Because he thought: "They may not all buy cakes today. For a few poor people, let them eat some for free, and I feel happy in my heart."
At this time, he looked through another window. When he saw the old man's face through the glass, he hurried over and opened the door with a smile, as if greeting a well-dressed rich man: "Come in, my friend, it's cold outside. Don't you want a cup of tea and some cakes?" The new apple cake I made seems to be very popular. "
"Thank you very much, sir," the old man replied, "Yes, I would like to try the new cake. Of course, your other cakes are also good. ."
The old man sat in a corner, eating every piece of cake placed in front of him. Other people in the store were busy, and no one noticed that the old man was wiping away tears. But the boss saw it, so he took a few more cakes and delivered them to the old man's table. Because he knew that it was impossible for such a poor old man to buy a whole piece of cake for himself.
Finally, the old man stood up and left. The shop owner walked to the door carrying a big box. "Please," he said to the old man and handed the box to him. "Please take this box of cakes as a gift. Let me give you a small gift!"
The old man's face turned red. "No no, sir, thank you!" He whispered, "I decided to buy a box of cakes for my family!" He walked solemnly back to the big table where the cakes were placed. Because he couldn't let the kind-hearted shop owner feel sorry for him, and his self-esteem did not allow him to do so, he pointed to the biggest piece of cake and said: "I want that piece."
He put his hand into his pocket and took it. All the money was counted and the cake was paid for. He left the shop knowing that he had just spent his last penny.
Slowly, the old man walked towards his home. "I can't eat it," he said sadly, "I can't enjoy it, but I can't waste it either." Suddenly, he smiled again. He walked over to the house of a neighbor who was as poor as himself, placed the cake on the front steps, and quietly left. On the street, the cold wind was still blowing hard, but the old man felt a warmth in his heart.
He walked toward home step by step.