Double-wheel milling of soil-cement mixing wall CSMTechnology, it is on the basis of hydraulic slotting machine equipment, combined with the deep mixing technology, innovate and underground continuous wall and the construction technology, combined with the hydraulic slotting machine equipment technical characteristics and application field of deep mixing technology, the equipment is applied to the more complex geological conditions, as the protection of foundation pit excavation supporting structure. After forming a wall, insert it in the slot section H Section steel to bear the bending moment during excavation. After the construction of the internal structure of the foundation pit is completed, theHThe section steel is pulled out with a vibrating hammer,H Section steel can be reused, which is beneficial to reduce the project cost.
１Section steel welding processing
For the convenience of lifting,HA circular hole is opened from the center of the top of the section steel before use, and the aperture is about8cm, and the welded thickness on both sides of the section steel is greater than or equal to 12mmThe reinforcement plate. If the length of the section steel is not enough, it is necessary to carry out split-welding, and the welds shall be fully welded at the groove. After welding, check whether there are bubbles, slag inclusion and the flatness of the weld is qualified. If not, repair welding shall be carried out, and the weld shall be polished with grinding wheel until it is as flat as the section steel surface. At the same time, in order to facilitate the drawing of the section steel,HSection steel must be coated with antifriction agent before use, coating should be 1mm~3mm, antifriction agent must be heated with electric heating rod to completely melt, with stirring rod stir feel uniform thickness, can be coated inHSection steel, otherwise the coating is uneven and easy to peel. It should be removed before brushing anti-friction agentH Dirt and rust on the surface of section steel.
２, section steel hoisting insertion
After the construction of the diaphragm wall under the deep mixed cement soil with double-wheel milling is completed, the crane should be immediately in place and ready to be lifted and loweredHSteel,50tCrane lifting H Steel. Place theHSteel positioning card, steel positioning card core must be firm, horizontal, accurate position, willHThe bottom center of the section steel is against the center of the positive pile position and is slowly inserted into the cement-soil mixing wall along the positioning card against the dead weight of the section steel H When the section bar is not up to the designed elevation, it will be raisedHSection steel, repeatedly insert to insert the design elevation, the process of insertion always use the theodolite tracking controlH Vertical degree of section steel, deviation is less than 0.5% . After the shaped steel is planted to the design elevation, it is fixed on the positioning steel until the cement wall in the hole is solidified.
Due to theHThe cement soil and the mud cleaned by the drill pipe should be cleaned by the excavator to clean the trench and keep the edge of the trench clean, so as to ensure the construction of the next process. The cleaned cement soil (slurry) is separated and hardened and transported out of the site to avoid mud pollution.
Shanghai Qiangqiang Foundation Engineering Co., LTD. 's business covers foundation pit engineering, pile foundation engineering, land and waterFoundation treatment, slope treatment and other engineering fields. around"Excellent technology, reliable process, fast construction" technical requirements, is to provide customers with land, water foundation engineering technical consultation, construction services and other comprehensive solutions of the entity enterprise. Contact Number:400-1002850
