Method for simulating stressed process and load-transferring mechanism of equivalently and horizontally loaded pile

A technology of load transfer and simulation method, which is applied in the field of indoor physical simulation of civil engineering, can solve problems such as complex calculation and influence of foundation pile safety degree, and achieve the effect of wide application range, simple and reasonable conception, and horizontal isotropy

Inactive Publication Date: 2018-07-24
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • 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

Method used

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  • Method for simulating stressed process and load-transferring mechanism of equivalently and horizontally loaded pile
  • Method for simulating stressed process and load-transferring mechanism of equivalently and horizontally loaded pile
  • Method for simulating stressed process and load-transferring mechanism of equivalently and horizontally loaded pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1: Pile top horizontal and vertical loaded pile simulation device

[0063] 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.

[0064]2. Determine the calculated pi...

Embodiment 2

[0079] Embodiment 2: Simulation method of pile top horizontally loaded pile.

[0080] 1. The production 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 in the first embodiment, and it is assumed that the soil layer of the pile side soil pressure on the side of the model pile 2 has a segment length of m. thickness.

[0081] 2. Loading simulation of pile top horizontally loaded pile and test of pile structure deformation and internal force. Adopt the "Technical Specification for Testing of Building Pile Foundation" (JGJ106) to load the model pile with the slow maintenance load method to load the test pile. The unidirectional multi-cycle grading 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, the horizontal displacement can be measured...

Embodiment 3

[0083] Example 3: Simulation of a horizontally loaded pile when the top of the pile is subjected to a vertical constant load.

[0084] 1. The production of the model pile, the installation of the model pile device, and the loading of the initial soil pressure on the side of the horizontally loaded model pile are the same as steps 1 to 13 in the first embodiment, and the segmental length h of the soil pressure on the side of the model pile is assumed to be the thickness of the soil layer.

[0085] 2. A constant vertical force is applied to the top of the pile. Before loading, the axis of the adjustment oil cylinder and the longitudinal axis of the model pile are in the same line, and pass through the geometric center of the bearing plate. The oil cylinder is connected with the oil cylinder control system through the oil pipe, and the sensor is connected with the sensor control system. The displacement meter is installed on the top surface of the model pile. On the side fulcrum ...

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Abstract

The invention discloses a method for simulating a stressed process and a load-transferring mechanism of an equivalently and horizontally loaded pile. By the method, physical simulation and visual teaching of the stressed process of the horizontally loaded pile (an axial force on the pile top can be selectively added) are achieved; the method is of a certain guiding significance on research on thehorizontally loaded pile; a pressure applying assembly and a pressure transmitting assembly are correspondingly connected together to apply an initial soil pressure initial earth pressure to a model pile arranged in a counterforce frame in a direction parallel to the application direction of a pile-top horizontal force, a lateral friction system applies pile-side frictional forces to both sides ofthe model pile in a direction parallel to the horizontal force loading direction, a pile body testing system is used for testing changes of pressure and displacement of each section of the pile bodyof the model pile; a horizontal cyclic force is applied to the pile top of the model pile or a vertical force is applied to the pile top in advance in a grading manner through a pile-top horizontal loading system and a pile-top vertical loading system, and horizontal deformation and vertical deformation of the pile top during grading application of the horizontal cyclic force are tested, so that simulation of the stressed process of the horizontally loaded pile is achieved.

Description

technical field [0001] The invention relates to a method for simulating 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 process of 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 action of wind load or seismic load, the load acting on the pile top is vertical. The combination of force and horizontal force, in addition, for projects such as cross-sea bridge pile foundations, wharf pile foundations, offshore engineering, offshore oil platforms, etc., they mainly bear horizontal loads such as wave force, tidal force and wind pressure, and may also bear the impact of ship collision. horizontal impact. A...

Claims

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Application Information

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IPC IPC(8): G06F17/50E02D33/00
CPCE02D33/00G06F30/13G06F2119/06
Inventor 李建军连勇吴昱璇裴勇常慧徐鹏程韩云山
Owner ZHONGBEI UNIV
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