Abstract
This paper introduces the research status and analysis of the Multi-Extruded-Expanded-Plates pile (the MEEP pile) at home and abroad, by studying when the plate of pile embedded in different characteristics soil layer, the thickness, physical properties of upper and lower soil layer adjacent to the soil with plate cause the influence on soil break and bearing capacity of the soil layer with plate, analyzing the work together with pile and soil in different soil layer, providing a theoretical basis to improve the calculation formula of bearing capacity of single pile, ensuring the rationality and reliability of the design of the MEEP pile.
Highlights
The research on the MEEP pile [1] under the vertical force already had preliminary results, but the research is mostly carried out in single layer, this paper aiming at this situation, by studying the plate embedded in different characteristics soil layer, the thickness and physical properties of upper and lower soil layer adjacent to the soil with plate cause the influence on soil break and bearing capacity of the soil layer with plate, analyzing the work together with pile and soil in different soil layer, after fully considering the impact, on the basis of existing theory, improving the formula of bearing capacity of single pile
The MEEP pile is a new pile foundation in recent years, it is in order to fully tap the foundation soil bearing potential of various hard soil layer, set bearing enlarging disk in different parts of the pile body, by increasing the end resistance of disks to improve the compressive or anti pulling force of pile, with high bearing capacity of single pile, material consumption, simple construction and short time limit, etc
Previous theory research of the MEEP pile under vertical loads are mostly concentrated in a single layer [3], assuming that pile plate embedded soil layer thickness is infinite, while the actual engineering is many different characters of soil and the thickness of each layer soil are certain limits, when the pile embedded in different characters of soil, the physical properties and thickness of the upper and lower soil whether have impact on the soil layer where the disks in is without research, if it has effect, the vertical force of the existing bearing capacity calculation formula is not accurate enough and its influence factor needs to be corrected
Summary
The research on the MEEP pile [1] under the vertical force already had preliminary results, but the research is mostly carried out in single layer, this paper aiming at this situation, by studying the plate embedded in different characteristics soil layer, the thickness and physical properties of upper and lower soil layer adjacent to the soil with plate cause the influence on soil break and bearing capacity of the soil layer with plate, analyzing the work together with pile and soil in different soil layer, after fully considering the impact, on the basis of existing theory, improving the formula of bearing capacity of single pile.THE RESEARCH STATUS AND ANALYSIS OF THE DIRECTIONThe MEEP pile is a new pile foundation in recent years, it is in order to fully tap the foundation soil bearing potential of various hard soil layer, set bearing enlarging disk in different parts of the pile body, by increasing the end resistance of disks to improve the compressive or anti pulling force of pile, with high bearing capacity of single pile, material consumption, simple construction and short time limit, etc.For the MEEP pile as bearing pile in engineering has been widely applied and the compression theory is relatively perfect, the MEEP pile under vertical loads of the compression and tension properties and mechanism of failure detailed research, the effect of piles and soil under the vertical force and damage of soil properties function curve has been derived through experiment and theory, the MEEP pile under the condition of single plate1874-1495/15 with single plate the vertical uplift and compression bearing capacity formula has been deduced [2].the destruction characteristics of the MEEP pile in different soil layer , study on the reasonable range or design method of qualitative or quantitative determination of related parameters are relatively few.
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