Calculation Method of Pile Body Internal Force Based on K-M Method
A calculation method and pile reinforcement technology, applied in the field of geotechnical engineering, can solve the problems that the lateral resistance cannot meet the normal use state or limit bearing state of the retaining wall, the foundation proportional coefficient of the natural soil foundation is small, and the lateral bearing capacity is low. To achieve the effects of strong practicability and reliability, easy access to parameters, and easy calculation
Active Publication Date: 2022-05-13
HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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Problems solved by technology
[0003] In engineering, it is often encountered that the stratum is a soil layer, and it is more reasonable to set up a pile-slab wall or a row of pile retaining walls, but the foundation proportional coefficient of the natural soil foundation is small, and the lateral bearing capacity is low. Setting a pile-slab wall or After the pile-row retaining wall, the displacement of the pile body at the anchor point and below and the lateral resistance of the foundation cannot meet the normal use state or ultimate bearing state of the retaining wall
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Embodiment 1
[0145] Determine the pile-slab wall length as follows:
[0146] Wherein, determine the width B=3m of pile; The calculation width B of pile 0 = 2m; length of reinforcement section h 1 =9m, unreinforced section length h 2 =9m; the intersection of the reinforced section and the unreinforced section is called the interface.
[0147] The bending stiffness of the pile EI=5.05×10 5 KN / m; foundation reaction coefficient K=198000; ratio coefficient of foundation reaction coefficient to depth change m=2200;
[0148] According to the force calculation of the cantilever section, the bending moment M acts on the pile top of the embedded section 0 and shear force Q 0 .
[0149] Reinforcement section h 1 The pile body is regarded as a lateral load pile subjected to horizontal concentrated load on the top of the pile, and when the foundation proportional coefficient is considered according to the K method, the deflection differential equation is:
[0150]
[0151] Among them, E is ...
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The invention discloses a method for calculating the internal force of a pile body in front of a reinforced pile-sheet wall pile based on the K-m method. The method includes the following steps: determining the length of the pile and the size of the section; Bending moment M acting at the top of the segment pile 0 and shear force Q 0 ; For the reinforced section, the K method of the finite difference method is used to obtain the coefficients of each node by iterative calculation; for the unreinforced section, the m method of the finite difference method is used to obtain the coefficient of each node by iterative calculation; the displacement at each node of the full pile is calculated; The internal force values of all nodes are determined by iterative calculation. In the present invention, the foundation in front of the pile is reinforced with sprayed piles for the foundation in front of the pile, and the internal force of the embedded section under the sliding surface in front of the pile in the sheet pile wall is divided into two parts: the reinforced section and the unreinforced section. The K method of the finite difference method is used for the calculation of the section, and the m method of the finite difference method is used for the calculation of the unreinforced section, so that the calculation results of the internal force of the foundation are more suitable for the actual calculation results.
Description
technical field [0001] The invention belongs to the field of geotechnical engineering, and in particular relates to a method for calculating the internal force of a pile body based on a K-m method for reinforcing a foundation in front of a pile sheet wall pile. Background technique [0002] In the calculation of the horizontal bearing capacity of a pile-slab wall or pile-row retaining wall pile foundation, the displacement and internal force of the pile body below the anchor point should be calculated by the foundation coefficient method according to the bending moment, shear force and elastic resistance of the foundation at the anchor point. For calculation, "K method" or "m method" can be selected according to rock and soil conditions. When the ground is a relatively complete rock formation, it is considered that the lateral foundation coefficient is constant and does not change with depth. This constant is usually expressed in "Kp", and the corresponding calculation metho...
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IPC IPC(8): G06F30/13G06F30/23G06F119/14
CPCG06F30/13G06F30/23G06F2119/14
Inventor 董捷李兆琦闫鑫赵士荣刘洋张星许鹏飞
Owner HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING