Simulation device for loading process and load transfer mechanism of equivalent horizontally loaded pile

A technology of load transfer and simulation device, which is applied in the field of indoor physical simulation of civil engineering, can solve problems such as complex calculations and influences on the safety of foundation piles, and achieves the effect of wide application range, simple and reasonable conception, and horizontal isotropy

Inactive Publication Date: 2018-11-27
ZHONGBEI UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still no definite conclusion on how much the second-order effect caused by the axial force is. Including the vertical axial force on the top of the pile will also make the calculation complicated.
In addition, in the calculation of horizontally loaded piles, the influence of the soil on the side of the pile parallel to the direction of the horizontal force of the pile is generally not considered, and the influence of the resistance of the soil on the side of the pile parallel to the direction of the horizontal force of the pile is mainly considered. These simplifications can be achieved to some extent Simplify complex issues, but how much these simplifications affect the safety of foundation piles still needs further consideration

Method used

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  • Simulation device for loading process and load transfer mechanism of equivalent horizontally loaded pile
  • Simulation device for loading process and load transfer mechanism of equivalent horizontally loaded pile
  • Simulation device for loading process and load transfer mechanism of equivalent horizontally loaded pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: Simulation device for horizontally loaded piles when the top of the pile bears constant vertical load

[0045] 1. Install the reaction force frame and the horizontal loading system at the top of the pile. Fix the bottom beam of the reaction force frame to the ground, and make the top surface of the beam horizontal, assemble the side beams on both sides and the top beam in turn, keep the axes of the side beams on both sides on the plumb line, and ensure that the axes of the top beam and the bottom beam are in line with the The axes of the side beams on both sides are vertical to complete the installation of the reaction frame. Install a horizontal oil cylinder on the right side wall of the pile delivery hole of the reaction force frame, install a horizontal force sensor and a horizontal force bearing plate on the piston rod of the horizontal oil cylinder in sequence, and connect the horizontal oil cylinder and the oil cylinder control system at the same time. ...

Embodiment 2

[0065] Embodiment 2: A simulation device for horizontally loaded piles on pile tops.

[0066] 1. The manufacture of the model pile, the installation of the model pile device, and the loading of the initial earth pressure on the side of the horizontally loaded model pile are the same as steps 1 to 11 of the first embodiment, and it is assumed that the pile side earth pressure on the side of the model pile 2 has a segmented length m of soil layer thickness.

[0067] 2. Loading simulation of the horizontally loaded pile on the top of the pile and pile structure deformation and internal force test. Use the "Technical Specifications for Testing of Building Pile Foundations" (JGJ106) to load the model piles with the slow-speed maintenance load method to load the test piles. The one-way multi-cycle graded load should not be greater than the estimated horizontal ultimate bearing capacity or 1 / 10 of the maximum test load. ; After each level of load is applied, after 4 minutes of const...

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Abstract

The invention discloses a simulation device for a loading process and a load transfer mechanism of an equivalent horizontally loaded pile. The simulation device realizes physical simulation and visualteaching of the loading process of the horizontally loaded pile (which can be optionally added with axial force on the pile top), and has certain guiding significance for research of the horizontallyloaded pile. A pressing component and a pressure transmission component are correspondingly connected together to apply initial earth pressure to a model pile arranged in a reaction frame in the direction parallel to the pile top horizontal force application direction. A lateral friction system applies pile side frictional force on the two sides of the model pile parallel to the horizontal forceloading direction. A pile body test system is used for testing changes of pressure and displacement of sections of a model pile body. A pile top horizontal loading system and a pile top vertical loading system are used for applying horizontal cyclic force to the model pile top by stages or pre-applying vertical force to the pile top, and testing horizontal and vertical deformation of the pile topin the process of applying horizontal cyclic force by stages. The device can achieve the simulation of the loading process of the horizontally loaded pile.

Description

technical field [0001] The invention relates to a simulation device for the stress process and load transfer mechanism of an equivalent horizontally loaded pile, which belongs to the technical field of indoor physical simulation of civil engineering. Background technique [0002] In the continuous development of modern cities, the construction of high-rise buildings has become the need of urban development, and the pile foundation has become the first choice for the foundation of high-rise buildings. Since the upper structure needs to bear the wind load or earthquake load, the load acting on the top of the pile is vertical In addition, for cross-sea bridge pile foundations, wharf pile foundations, offshore engineering, offshore oil platforms and other projects, they mainly bear horizontal loads such as wave force, tidal force, and wind pressure, and may also bear the impact of ship collisions. horizontal impact. Anti-slide piles in landslides also mainly bear horizontal loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/04
CPCG01N3/04G01N3/08G01N2203/0019G01N2203/0035
Inventor 李建军裴勇宋述捷常慧徐鹏程连勇靳小俊李剑锋
Owner ZHONGBEI UNIV
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