Model test device for simulating jacked pile driving process

A model test device and a technology of static pressure piles, which are applied in foundation structure tests, foundation structure engineering, construction, etc., can solve problems such as insufficient consideration and interpretation of influencing factors and pile sinking characteristics

Inactive Publication Date: 2013-02-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Theoretical research cannot fully consider and explain many influencing factors and pile sinking characteristics of steady-state penetration
Therefore, in order to make up for the limitations of theoretical analysis, for important projects, it is necessary to conduct analysis in combination with indoor model tests. The key technology is how to simulate that static pressure piles can continuously penetrate into the soil at a certain rate, and no relevant issues have been found so far. report

Method used

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  • Model test device for simulating jacked pile driving process
  • Model test device for simulating jacked pile driving process
  • Model test device for simulating jacked pile driving process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as Figure 1~5 As shown, a model test device for simulating the process of static pressure pile sinking, the manual chain type static penetrating sounder 1 is fixed on the top of the model box by 4 U-shaped clips 9, the chain of the manual chain type static penetrating sounder 1 11 is provided with locking tooth 13, and this locking tooth 13 clamps gable plate 3, and gable plate 3 is fixed on the chain 11. Pad pressing plate 4 pad is arranged on the below of gable plate 3. There is a reserved hole on the top of the manual chain type static penetrometer 1 through which the iron rod 2 can pass. The iron rod 2 extends into the reserved hole sequentially from above and passes through the gable plate 3 and the backing plate 4 in sequence. The lower end is connected with the pressure sensor 5 by bolts. The model pile 7 adopts a circular full model pile, the upper end of which is connected below the pressure sensor 5 through a positioning sleeve 63. The middle part of t...

Embodiment 2

[0025] A model test device for simulating the pile sinking process of static pressure piles. The model pile 7 adopts a semicircular half mold pile, and the positioning hole 621 on the second positioning plate 62 is correspondingly opened as a semicircle, and the steel pipe at the lower part of the positioning sleeve 63 Also cooperate with the shape of the model pile 7 to be a semicircular steel pipe. When using this device, the model stake 7 passes through the semi-membrane positioning hole 612 on the first positioning plate 61 near the side wall of the model box 7, and adjusts the positions of the manual chain type static penetrometer 1 and the positioning guide assembly, so that the model stake 7 It sticks to the side wall of the model box 7 and extends into the soil. The side wall is made of tempered glass, which is convenient for observing the displacement field change of the soil on the side of the pile when the model pile 7 is inserted into the soil. The rest is the same ...

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Abstract

The invention relates to a model test device for simulating a jacked pile driving process. The model test device comprises a hand-operated chain-type static penetrometer, a model box, a hill-shaped plate, a pad pressing plate, an iron rod, a pressure sensor, a model pile and a positioning and guiding component, wherein the hand-operated chain-type static penetrometer is fixed at the top of the model box; the hill-shaped plate is fixed on a chain of the hand-operated chain-type static penetrometer; the pad pressing plate is padded under the hill-shaped plate; the iron rod extends into the hand-operated chain-type static penetrometer from the top, and passes through the hill-shaped plate and the pad pressing plate in sequence; the lower end of the iron rod is connected with the pressure sensor; the model pile is arranged under the pressure sensor; and the positioning and guiding component is used for fixing the model pile to ensure that the model pile vertically passes through the bottom of the hand-operated chain-type static penetrometer and extends into the model box. Compared with the prior art, the model test device has the advantages that jacked piles can continuously penetrate into soil, and the pile driving rate is controllable.

Description

technical field [0001] The invention relates to a model test device, in particular to a model test device for simulating the pile sinking process of static pressure piles. Background technique [0002] In recent years, with the increasing improvement of static pressure pile construction technology and machinery and the improvement of urban environmental protection requirements, static pressure pile has been welcomed by design, construction and other departments. In recent years, it has been widely used in soft soil areas and densely populated cities in my country, and has achieved good results. It has become the main pile type in the design and construction of foundations in my country. [0003] However, the pile sinking process of the static pressure pile is a steady penetration process, and the mechanical characteristics of the penetration process are different from the static load test of the pile, which is a dynamic process. Theoretical research cannot fully consider an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
Inventor 李镜培李雨浓饶平平
Owner TONGJI UNIV
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