There are some construction techniques for the inner drain: Positioning → Drainage trench excavation (prefabricated drainage ditch cover) → Ditch bottom compaction → 100mm thick C10 ditch bottom → Drainage trench side wall MU10 standard brick, M7.5 cement mortar masonry → 75UPVC drain pipe → 20mm thick 1:2 waterproof cement mortar surface → 100mm thick C20 concrete top → maintenance → drain cover plate equipment → trench groove backfill Measurement positioning: Drainage ditch is the main line of the whole project. According to the construction drawings and on-the-spot surveys, a ±0.000 standard point is determined. The orientation is accurately released by the theodolite, and the intermediate pile and the two center points are used to control the direction of the drainage ditch and the direction of the drainage ditch. According to the orientation of the outlet and the elevation of the gully, the highest and lowest points of the gutter are determined, the cover plate is made active, and the width of the gray line of the gutter is determined taking into account the depth of the gutter and the grading coefficient of the soil. Drain trench excavation: 1. For the project drainage ditches, artificial excavation earthwork shall be selected, and the raft bottom shall be flat and compacted with a ramming machine. The demand for compaction shall reach 85% or more, and the water level shall be used to control the elevation of the ditch bottom. After the excavation, the drainage ditch shall be tested according to the standard standards of the drawing drawings. After passing the inspection, the next step shall be carried out. 2, Shen Shajing In order to facilitate picking up the ditch in the future, sand-draining wells will be installed along the ditch, about 40m away, and at the intersection of the ditch, and the dwelling wells will be approximately 200mm below the bottom of the ditch. Drain cover cover: 1, steel processing and binding (1) Rebar material Check the steel bar standards, grades, and processing quantities carefully before cutting. The steel bar is cut and selected by the steel cutting machine; before the steel bars are cut, the chalk shall be marked on the steel bar according to the length of the cutting material to mark the cutting direction. When blocking, the cutting mark will be aligned with the cutting edge and the bar will be placed in the cut. Slotting will block it; when the reinforcing bar is thin, it can be cut manually with iron pliers; under a single condition, it can also be cut with a grinding wheel saw. (2) Rebar bending The bending of steel bars should be carried out on the working method using steel twisters. The bending and ending hooks of the steel bars should all meet the drawing requirements. (3) Bundling of steel bars In accordance with the demand for reinforcing bars, wire tie is used for the intersection of reinforcements. 2, prefabricated drain cover The excavation of the drainage ditch is performed together with the prefabrication of the drain cover and the C25 concrete prefabricated cover plate is used. Plane and compact the coping place before preparation. Demand for drainage ditch cover standard Founder, mold release agent before the application of the template, the template standards should meet the needs, there should be left 150mm × 30mm drainage holes. The groove cover surface is smoothed with the same grade of cement mortar without any trachoma. After the concrete is formed, it is dispatched to a person for maintenance with a sack cover. Prefabricated reinforced concrete cover quality requirements: visual inspection of its appearance to see the need to reach the appearance of color together, no exposed stone, peeling, cracks and other appearances, prefabricated products appearance standards accurate, smooth surface lubrication, it is necessary to meet the description requirements, on-site good test Piece. C15 concrete trench floor construction: The bottom of the drainage ditch is made of C15 concrete. The slope of the ditch is 3 inches long. It is discharged into two existing wells in the southeast corner and the southwest corner, and is discharged into the school drainage system. 1. Normal demand: The floor concrete should be continuously irrigated and no joints should be left. 2, calendered surface: After the completion of concrete pouring, the concrete surface in a timely manner to clean, clean the appearance of bleeding. After the concrete is closed, it is compacted and collected, and the health is covered immediately after the initial setting. 3, concrete maintenance The maintenance of concrete should avoid early water dehydration and water shortage during maintenance. After the concrete is poured, it is covered within 12 hours and watered and maintained. Under normal temperature, the concrete is covered with watering and maintenance to ensure that the concrete surface is always in a wet condition; when the temperature is less than 5°C, no watering is allowed to prevent the concrete from freezing. Drainage groove side wall MU10 standard brick, M10 cement mortar masonry: 1, pick up, put line (1) Picking up: Excavate and clean the excellent objects on the concrete floor and the touch surface of the wall and clean it with water. (2) Take-off line: According to the drawing wall standard, the wall axis and width line are ejected with ink lines on the top surface of the floor. After passing the inspection, the standard compressive strength of the floor concrete reaches 1.2N/mm2 for masonry. Before the masonry, the flatness and height difference of the concrete floor of the floor were measured and leveled with cement mortar so that the elevation of the bottom of each section of the brick wall matched the depiction requirements and the mortar joints were adhered to. 2, bricklaying The wall uses MU10 standard brick, M10 cement mortar masonry, ditch net width 400mm, when masonry wall, should ensure the quality of wall masonry. (1) In the masonry project, it is necessary to check whether the wall surface is straight and flat and the mortar joint is in line with the demand. During the masonry process, make sure that the walls are straight and flat and the mortar joints together. (2) Considering that the water of the drainage ditch in the football field enters the inner ring ditch, the ditch wall needs to be embedded with a Φ25 PVC pipe with a distance of 3m. The water supply pipe is used with a 30×30×30 angle iron bracket and is fixed with an Ø32 water supply pipe. (3) Corners and junctions of brick walls should be masonry with walls. When the masonry is continuous, it should be built into slanting concrete. When picking up the masonry, you should first clean and clean the mortar and mortar. (4) Curve Laying, Branch Line Disposal The measuring staff put the arc drawing line according to the drawing drawings, arranged the bottom of the brick, and controlled the circular arc and the straightness of the wall according to the brick seams. Reserve branch pipe should be installed along with security, not to reserve holes. 150mm thick C25 concrete top: After the waterproof cement mortar finish is completed, C25 concrete top is pressed. Before C25 cement concrete construction, cement, sand, pebbles and other materials should be sent to the local inspections approved by the owners. Seriously, according to the collaborative comparison of composition data, all collaborations should be satisfied with the requirements of the first-class highway cooperation and relevant requirements, and the technical requirements for concrete materials should satisfy the relevant requirements of the first-class highway for concrete. Detailed C25 concrete collaboration data is as follows: Cement: Water: Sand: Grading Stones=1:0.51:1.81:3.68 20mm thick 1:2 waterproof cement mortar finish: 1. Wiping the surface of the brick wall, along with the bricklaying, the mortar leaking between the bricks is flattened. 2. The residual mortar bonded to the external surface of the masonry shall be cleaned and the brick surface watered and moistened. 3. The strength grade of the plaster cement mortar shall conform to the drawing rules and the consistency shall satisfy the construction requirements. 4, cement mortar surface should be divided into two red. After the first mortar was plastered, it was leveled with a spatula and flattened with a wooden trowel for a distance of 48 h before the second surface was applied. The second mortar was divided into two passes and the compaction was completed. 5. The construction of the plastering surface shall be in the shape of a ladder, and the upper floor shall be staggered. The orientation of the remaining ground shall be more than 150 mm away from the intersection. When you are picking up, you should first evenly coat the slurry with cement slurry and then layer them in layers. maintain: 1. After finishing the final coagulation of the mortar, it should adhere to the appearance of moist, it should be watered once every 4h. 2. Wet and poorly ventilated underground trench walls. When the surface of the trowel shows a lot of condensed water, watering and maintenance should be reduced. 3. The parts of the drainage ditch covered by the sun and the parts that are easy to air dry should be covered and watered for maintenance. Drain cover equipment: The prepared prefabricated cover plate equipment to the drainage ditch, the equipment should be stable, flat and strong. The device cover must be carefully manipulated for its flatness and line type, and there must be no ±0.5mm difference between the plates. Sinking wellhead covers use precast concrete cover plates. Groove backfill: 1. Both ends of the trench should be cleaned before backfilling. 2. When backfilling masonry mortar and concrete should reach the required compressive strength to describe the rules. 3. After the trench cover device is completed, the strength of the board joint mortar or concrete should also reach the drawing requirements. 4. It is necessary to symmetrically backfill both ends of the drain during backfilling to prevent unilateral backfilling. 5. The backfill soil is approximately layered and backfilled and compacted. The degree of compaction after backfilling is consistent with the description and related standard requirements. D500 Concrete Drainage Pipe Laying to Municipal Drainage Pipe Network: 1. Cast concrete concrete base: After the inspection tank is qualified, the concrete shall be poured in time. The height of the plain-based concrete shall not be higher than the depicted elevation, and shall not exceed 10mm below the depicted elevation, and the concrete shall be covered and preserved. 2. Lower pipe: When the strength of the flat base concrete reaches 5Mpa or more, the artificial lower pipe is used. 3, security management: An Guan's counterpart does not leave space. 4, pouring pipe concrete: cast pipe base concrete front base should be washed clean, flat base and pipe touch triangle, with the use of concrete with the same strength grade pipe concrete filling, concrete pouring pipe, should be two The ends are carried together to prevent pipe deflection. 5, cement mortar wipe: wiper and interface are used 1:2.5 cement mortar. Wipe and clean the mouthpiece and tube outer skin before wiping. The bandwidth is 120mm and the thickness is 30mm. After the wipes were finished in two layers, the thickness of the first layer of mortar was about 1/3 of the thickness, and the compaction was performed to make the wall adhesively strong. In the appearance, the groove was cut to facilitate the communication with the second layer. After the initial coagulation of the first layer, the second layer is wiped and pressed with an arc-shaped trowel to form a compaction. The initial coagulation is followed by lighter compaction with a trowel. After the wipe is over, cover it with soft and soft data and water and maintain it after 3-4 hours. 6, trench backfill (1)Before backfilling, the following conditions shall be met: The concrete drainage pipe shall be laid at the strength of the concrete foundation, and the joint cement strength of the interface wiper belt shall reach 5Mpa, and the closed water test or closed gas test shall be conducted. (2) The demand for backfill soil: Backfill soil should preferentially use the soil excavated in the base tank, but it must not be rich in organic impurities, and should not use silt or silt soil as the filler. The backfill soil should meet the requirements of the description and construction standards. The optimum moisture content should be determined by experiments. (3) The backfilling shall be carried out in a layered manner from the high to the low lumen ends in the base drainage direction. The filling shall not be thrown directly on the pipeline. The artificial return of soil is used, and the soil is laid layer by layer when the soil is returned. (4) Compaction: The compaction of backfill soil is artificially compacted.夯 In real time, both ends of the pipe work together, and the pipe must not be displaced or damaged. Backfill compaction should be carried out layer by layer, light ramming with a thin shop, use wooden rakes, frog rams and other compacted things, should be connected, the width of the stack shall not be less than 200mm. Related Reading: "Plastic Raceway Maintenance and Maintenance" "Complete construction process of plastic runway"
Electric stapler small stapler stapling machine
There is at least one stapler in every office. It provides us with an ideal means of keeping many pages of paper bound together. We believe that many students also have stapler at home. In fact, the earliest stapler was not an office appliance at all. It was developed for the printing industry. Stapler, in addition to manual, there are electric stapler, mainly for product binding, molding. Electric stapler can have a head, but also long, long set. China's first long electric stapler, electric stapler is Vinci beckham.
Electric stapler Book Punching Machine,Book Drilling Machine,Book Stapling Machine,Book Binding Machine Anhui Innovo Bochen Machinery Manufacturing Co., Ltd. , https://www.innovomachines.com
December 04, 2020