Effective reinforcing depth design method for strengthening saturated sand foundation through dynamic consolidation method

Abstract

The invention provides an effective reinforcing depth design method for strengthening a saturated sand foundation through a dynamic consolidation method, and relates to the technical field of soft soil foundation strengthening. According to the method, the compaction shell maximum depth z<1> and the compaction shell influence depth h<y> generated due to dynamic consolidation vibration are calculated, finally, the effective reinforcing depth Z of the dynamically-consolidated and strengthened saturated sand foundation is obtained through calculation and is the sum of the compaction shell maximumdepth z<1> and the compaction shell influence depth h<y> generated due to dynamic consolidation vibration and the consolidation pit depth h<h> generating the compaction shell maximum depth. Accordingto the provided effective reinforcing depth design method for strengthening the saturated sand foundation through dynamic consolidation, the dynamic consolidation saturated sand foundation engineering design can be objectively developed, the dynamic consolidation engineering trial consolidation and detection work is developed in a targeted manner, the engineering construction efficiency is improved, and the engineering cost is reduced.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation reinforcement, in particular to an effective reinforcement depth design method for reinforcing a saturated sandy soil foundation by a dynamic compaction method. Background technique [0002] At present, domestic and foreign studies on the reinforcement of soft soil foundations by dynamic tamping have been carried out in experiments and theory, mainly involving the reinforcement of soft soil foundations by dynamic tamping in saturated cohesive soils, unsaturated cohesive soils, and unsaturated sandy soils. Statistical phase of empirical data. In the mandatory specification "Technical Specifications for Building Foundation Treatment (JGJ 79-2012)", the effective reinforcement depth "Table 6.3.3-1 Effective reinforcement depth of dynamic compaction" is summarized according to the field application situation, which is not given in other documents Effective reinforcement depth design meth...

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Problems solved by technology

With the extensive application of sea sand dredging in the construction of islands, reefs and coastal flats in recent years, and the characteristics of short construction time and significant economic benefits of the dynamic compaction method, the dynamic compaction method has been widely used in the reinforcement of saturated sandy soil foundations, but there is no To establish a scientific and reliable effective reinforcement depth design method, relying solely on the tamping test to determine the design parameters is blind and costly, so it is urgent to propose an effective reinforcement depth design method for the reinforcement of saturated sandy soil foundations by dynamic tamping

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