Comprehensive Analysis of Construction Control Points and Practice of Soft Clay Foundation
In order to avoid adverse factors such as difficulty in lowering and drainage,difficulty in excavation and complexity of foundation work surface during construction on soft clay stratum,the quality of the project may be common and even the occurrence of engineering accidents.Through the study of the geological characteristics of soft clay and the summary of construction practice,it is concluded that the layout of well point pipe and the excavation method in the later period should be controlled with light well point precipitation.The base area is large,not suitable for large slope,cement soil mixing pile should be used as foundation pit enclosure,to cement dosage,mixing method,joint and other key control;the pressing concrete at the top of the enclosure should not be poured continuously for too long,and should be disconnected within the length range of 50～70m;After excavation,the soil at the bottom of the foundation pit has low strength and insufficient pressure,so the elevation should be properly reserved.Soil moisture content is high,all contact with the soil parts,require a good foundation waterproof layer,avoid joint disconnection;reasonable construction of post-pouring belt to avoid the impact of settlement deformation on structure safety;for large and deep foundation concrete pouring,appropriate methods should be taken to control the release of hydration heat of concrete and prevent cracks caused by temperature difference and shrinkage.The wall board needs to reserve holes,construction joints,etc.,should be reinforced.
soft clayfoundation pit enclosureexcavationprecipitationmain construction
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