Key points of SMW construction technology: 1. Strict control of design requirements for slurry preparation. 2, the soil should be fully stirred, the sinking speed should be strictly controlled, so that the original soil is fully broken to help evenly mix with cement slurry. At the same time, in order to accelerate and reduce the impact on the surrounding strata, the stirring can be connected with compressed air for full stirring.
SMWmethodKey points of construction technology:
1,SMWThe grout is strictly controlled during construction.
2The soil should be fully stirred, the sinking speed should be strictly controlled, and the undisturbed soil should be fully broken to be conducive to mixing evenly with the cement slurry. At the same time, in order to accelerate and reduce the impact on the surrounding strata, the stirring can be connected with compressed air for full stirring.
3,Grout segregation cannot occur, cement grout should be made strictly according to the predetermined proportion, to prevent mortar segregation, slurry must be stirred before putting30Second and then pour into the slurry bucket.
4,SMWDuring the construction method, the flushing water shall not sink, and the lifting speed of the drill shall not be greater than2.0m/min, its perpendicularity deviation shall not exceed0.5%, the construction interval between two adjacent piles shall not exceed24h.
5,During the grouting stage, the phenomenon of breaking slurry is not allowed, the grouting pipeline cannot be blocked, the whole pile must be grouting evenly, and the sandwich layer is not allowed. Find pipe blockage, immediately stop the pump for treatment. Lift or sink the stirring drill immediately after treatment1.0mRear can grouting, etc10-20After seconds, the normal stirring will be resumed to prevent pile breaking.
6The overflowed soil shall be transported to the collection pit at the construction site by internal barge in time and piled up in a temporary manner. The soil shall be transported outside until it reaches a certain strength.
7,SMWMethod of constructionHThe section steel shall ensure the perpendicularity and flatness, no distortion shall be allowed, and the perpendicularity shall be guaranteed when inserted. insertHIf the section steel has a joint, the joint should be located below the excavation face, and two adjacentHSection steel joints should be staggered1mThe above.
8,To pull out and recycleHThe section steel must be coated with antifriction agent before insertion, and the section steel should be filled with cement mortar in time after being pulled out.
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
