Six axial mixing pile is a strong foundation in the existing Shanghai uniaxial and biaxial, three-axis mixing pile on the basis of the development of a new type of cement-soil pile, inherited the principles of the biaxial mixing pile and displacement of soil, water cement ratio is small, low cost, less advantages, overcomes the biaxial and triaxial mixing pile work efficiency is low, the low degree of automation, the labor intensity of workers, poor mechanical safety defects.
Construction preparation of six-axis mixing pile
1,The construction site of mixing pile should be levelled in advance, and all obstacles above and underground should be removed from the pile position(Including boulders, tree roots and household waste). When the site is low, it should be backfilled with clay, and no miscellaneous soil should be backfilled.
2,Cement mixing pile shall be qualifiedPO42.5Grade A ordinary silicate packed cement for easy measurement. Before use, the CONTRACTOR shall send cement samples to THE CENTRAL laboratory or the laboratory designated by the Supervision Engineer for inspection.
3, cement mixing pile construction machinery should be equipped with computer recorder and printing equipment, in order to understand and control the amount of cement slurry and spraying uniformity. The supervision engineer collects computer records once a day.
4The construction machinery of cement mixing pile must have good and stable performance. Before drilling, all drilling RIGS shall be inspected and accepted by supervision engineers and project management department before drilling.
5,Use excavator or bulldozer and other machinery to level the site, leveling elevation is higher than the design determined pile top elevation0.3～0.5m, static pressure with roller after leveling2Times.
6,The TOTAL STATION INSTRUMENT IS USED TO RESTORE THE MIDDLE LINE PILE OF THE line, determine the position of the pile, arrange the level point, control the elevation, and mark the position of the pile with lime or driven bamboo pile for technical disclosure. Artificial excavation around the construction section50cm×50cmTo make temporary drainage facilities.
7,The cement on site must be protected from rain and moisture. The stacking site must be flat and compacted and higher than the original ground20cmThe left and right sides, with10cm×10cmSquare wooden support pad, the shop on a layer2cmWooden boards and colored cloth strips.
8,Check whether the cement mortar mixing pile machine and grouting press are running normally, check whether various materials are ready in place, dig the slurry pit, and put it into the slurry bucket (1.5m3), after the pile machine is in place, start pulping according to the mixing ratio.
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