桩侧桩端后注浆灌注桩水平静载特性研究

doi:10.13722/j.cnki.jrme.2014.0566

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Abstract By analyzing the horizontal static load test results of bored piles in certain area，experimental research on application effects for bored piles with pile lateral friction and tip resistance grouting technique are studied. The results show that：(1) The characteristic value，critical value and ultimate limit value of horizontal bearing capacity of bored piles depend mainly on the pile-soil interaction force. (2) By compared with test results of single pile，the critical load with grouting technique is increased by 25% and the ultimate value is increased by 14.3%. (3) The coefficient of pile lateral soil resistance coefficient of single pile with grouting technique is increased by 57%. (4) Compared with the calculated results for two piles cap，the value of horizontal critical load for two piles cap with grouting technique is increased by 33.7%. (5) Based on the relationship between a variety of soil deformation modulus and its m values，a linear equation about deformation modulus and m value is proposed and the expression of grouting soil composite compression modulus is deduced. The calculation method about m value of grouting soil is proposed. Tests and calculation demonstrate that by adopting grouting technique with pile lateral friction and tip resistance，the value of horizontal capacity of bored piles can be improved significantly.

Key words： pile foundations bored piles static load test grouting technique lateral soil resistance critical load

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2014.0566 OR http://www.rockmech.org/EN/Y2015/V34/Is1/3588

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