Research on New Type of Cement-soil Piles to Reinforce Soft Soil Foundation

The new type of cement-soil pile (NCSP) is an environmentally friendly pile, which compulsorily mixes the soil and curing agent outside the in-situ foundation. During the mixing process, a certain amount of construction waste can be used to form a homogeneous plastic pile while forming a hole. Based on the standard penetration test (SPT) and the unconfined compressive strength test, the variation law of the standard penetration test and the unconfined compressive strength(q
u
) along the depth of the pile is discussed, established the correlation between the number of standard penetration test and the unconfined compressive strength. The difference between the theoretical value and the measured value of the composite foundation bearing capacity is clarified. The results show that the standard penetration stroke and the unconfined compressive strength are uniformly distributed along the depth, and the two have a good linear relationship. The unconfined compressive strength increases with the increase of the cement content. The pile type can meet the requirements of the engineering. It has good engineering characteristics for construction needs.