Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for analyzing lateral resistance of post-grouting pile by cohesive soil plasticity index
The invention provides a method for analyzing side resistance of a post-grouting pile by a cohesive soil plasticity index, which comprises the following steps of: arranging a resistance-type steel bar strain gauge along sectional section treatment of a pile body, and testing to obtain test data of axial force of a test pile to determine a side resistance value of a soil layer around the pile; the limit end resistance standard value of the pile and the pile side and pile end sharing ratio are inversely calculated according to the limit side resistance standard value of each soil layer obtained through actual measurement of the resistance type steel bar strain gauge on the pile body of the post-grouting cast-in-situ bored pile, and then the pile side grouting effect is analyzed. According to the method for analyzing the side resistance of the post-grouting pile by the cohesive soil plasticity index, a close relation exists between the cohesive soil plasticity index and the post-grouting enhancement coefficient, and due to the fact that the change range of the cohesive soil plasticity index is large, the calculation error is large inevitably due to the fact that the enhancement coefficient specified by the specification is singly adopted; the corrected enhancement coefficient beta i obtained by using the method is more in line with actual engineering experience. The method has a certain engineering practical application value, and has guiding significance on design and construction parameter taking.
本发明提供了一种黏性土塑性指数对后注浆桩侧阻力的分析方法，沿桩身分段截面处理设电阻式钢筋应变计，测试得出试桩的轴力的试验数据确定桩周土层的侧阻力值，通过对后注浆钻孔灌注桩桩身电阻式钢筋应变计实测所取得的各土层极限侧阻力标准值反算桩的极限端阻力标准值、桩侧桩端分担比，进而分析桩侧注浆效果。本发明所述的黏性土塑性指数对后注浆桩侧阻力的分析方法，黏性土塑性指数与后注浆增强系数之间存在紧密关系，由于黏性土塑性指数变化范围较大，单一采用规范规定的增强系数必然会导致计算误差较大，应用该方法得出经修正后的增强系数βi，更符合实际工程经验。具有一定的工程实际应用价值，对设计及施工参数取用具有指导意义。
Method for analyzing lateral resistance of post-grouting pile by cohesive soil plasticity index
The invention provides a method for analyzing side resistance of a post-grouting pile by a cohesive soil plasticity index, which comprises the following steps of: arranging a resistance-type steel bar strain gauge along sectional section treatment of a pile body, and testing to obtain test data of axial force of a test pile to determine a side resistance value of a soil layer around the pile; the limit end resistance standard value of the pile and the pile side and pile end sharing ratio are inversely calculated according to the limit side resistance standard value of each soil layer obtained through actual measurement of the resistance type steel bar strain gauge on the pile body of the post-grouting cast-in-situ bored pile, and then the pile side grouting effect is analyzed. According to the method for analyzing the side resistance of the post-grouting pile by the cohesive soil plasticity index, a close relation exists between the cohesive soil plasticity index and the post-grouting enhancement coefficient, and due to the fact that the change range of the cohesive soil plasticity index is large, the calculation error is large inevitably due to the fact that the enhancement coefficient specified by the specification is singly adopted; the corrected enhancement coefficient beta i obtained by using the method is more in line with actual engineering experience. The method has a certain engineering practical application value, and has guiding significance on design and construction parameter taking.
本发明提供了一种黏性土塑性指数对后注浆桩侧阻力的分析方法，沿桩身分段截面处理设电阻式钢筋应变计，测试得出试桩的轴力的试验数据确定桩周土层的侧阻力值，通过对后注浆钻孔灌注桩桩身电阻式钢筋应变计实测所取得的各土层极限侧阻力标准值反算桩的极限端阻力标准值、桩侧桩端分担比，进而分析桩侧注浆效果。本发明所述的黏性土塑性指数对后注浆桩侧阻力的分析方法，黏性土塑性指数与后注浆增强系数之间存在紧密关系，由于黏性土塑性指数变化范围较大，单一采用规范规定的增强系数必然会导致计算误差较大，应用该方法得出经修正后的增强系数βi，更符合实际工程经验。具有一定的工程实际应用价值，对设计及施工参数取用具有指导意义。
Method for analyzing lateral resistance of post-grouting pile by cohesive soil plasticity index
黏性土塑性指数对后注浆桩侧阻力的分析方法
YANG XIAONAN (Autor:in) / SUN HUAIJUN (Autor:in) / SONG SHIJIE (Autor:in) / FU YABING (Autor:in) / LI LIANYING (Autor:in) / DUAN ZHIQIANG (Autor:in) / MU LEI (Autor:in) / YE JINGXIONG (Autor:in) / YANG HUILIN (Autor:in) / LI WENQIANG (Autor:in)
30.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
Jet Grouting and Soil Mixing for Increased Lateral Pile Group Resistance
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