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Negative friction resistance detection test device and method for pile foundation in collapsible loess
The invention provides a negative friction resistance detection test device and method for a pile foundation in collapsible loess, and belongs to the technical field of collapsible loess. The negative friction resistance detection test device comprises an experiment box, a loess layer and a water filtering layer are sequentially and horizontally arranged in the experiment box from top to bottom, a plurality of test piles are vertically inserted in the loess layer, and stress strain sensors are arranged on the test piles; the lower end of the test pile is fixed in the loess layer, a water inlet pipe is arranged at the position, located at the loess layer, of the left side of the test box, and the water inlet pipe is located below the test pile. In this way, when the pile foundation is constructed in the severe collapsible loess area, the pile side friction resistance is reduced, then the designed pile length is reasonably reduced, the using amount of pile body reinforcing steel bars and concrete is effectively reduced, and materials are saved. Meanwhile, the building is prevented from being excessively settled, and the safety of the building is improved.
本发明提供了一种湿陷性黄土中桩基的负摩阻力检测试验装置及方法，属于湿陷性黄土技术领域，包括实验箱，实验箱内从上往下依次水平设有黄土层与滤水层，黄土层上竖直插设有若干试验桩，试验桩上设有应力应变传感器，试验桩的下端固定在黄土层内，实验箱的左侧位于黄土层处设有进水管，进水管位于试验桩下方，本发明通过实验数据采集，结合数值模拟，总结试验桩的负摩阻力在湿陷性黄土中产生的阻力变化情况和规律，以此使该类型桩基在重度湿陷性黄土地区施工时通过减少桩侧摩阻力进而合理减少设计桩长，有效减少桩身钢筋、混凝土用量，节约材料。同时防止建筑物出现过渡沉降，提高建筑物的安全性。
Negative friction resistance detection test device and method for pile foundation in collapsible loess
The invention provides a negative friction resistance detection test device and method for a pile foundation in collapsible loess, and belongs to the technical field of collapsible loess. The negative friction resistance detection test device comprises an experiment box, a loess layer and a water filtering layer are sequentially and horizontally arranged in the experiment box from top to bottom, a plurality of test piles are vertically inserted in the loess layer, and stress strain sensors are arranged on the test piles; the lower end of the test pile is fixed in the loess layer, a water inlet pipe is arranged at the position, located at the loess layer, of the left side of the test box, and the water inlet pipe is located below the test pile. In this way, when the pile foundation is constructed in the severe collapsible loess area, the pile side friction resistance is reduced, then the designed pile length is reasonably reduced, the using amount of pile body reinforcing steel bars and concrete is effectively reduced, and materials are saved. Meanwhile, the building is prevented from being excessively settled, and the safety of the building is improved.
本发明提供了一种湿陷性黄土中桩基的负摩阻力检测试验装置及方法，属于湿陷性黄土技术领域，包括实验箱，实验箱内从上往下依次水平设有黄土层与滤水层，黄土层上竖直插设有若干试验桩，试验桩上设有应力应变传感器，试验桩的下端固定在黄土层内，实验箱的左侧位于黄土层处设有进水管，进水管位于试验桩下方，本发明通过实验数据采集，结合数值模拟，总结试验桩的负摩阻力在湿陷性黄土中产生的阻力变化情况和规律，以此使该类型桩基在重度湿陷性黄土地区施工时通过减少桩侧摩阻力进而合理减少设计桩长，有效减少桩身钢筋、混凝土用量，节约材料。同时防止建筑物出现过渡沉降，提高建筑物的安全性。
Negative friction resistance detection test device and method for pile foundation in collapsible loess
一种湿陷性黄土中桩基的负摩阻力检测试验装置及方法
ZHANG ZHAOJI (author) / WANG ZHIZHONG (author) / LI YANJING (author) / FAN HAOHUA (author) / LI LEI (author)
2023-12-22
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Pile foundation treatment method for eliminating negative friction resistance of collapsible loess
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