Vibration immersed tube compaction pile model test device and test method

A model test device and model test technology, which is applied in the test of basic structure, construction, basic structure engineering, etc., can solve the problems of inaccurate measurement results, inability to give soil, and the sensor is easily disturbed by the external environment, etc.

Inactive Publication Date: 2014-07-23
HUNAN CITY UNIV
View PDF4 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional soil deformation measurement method is to bury a series of sensors inside the soil to obtain the displacement of some discrete points, but the sensors are easily affected by the disturbance of the external environment, and the measurement results are often not accurate enough, and at the same time, the continuous deformation inside the soil cannot be given. entire displacement field
Modern digital image technology is only limited to measuring the macroscopic or boundary deformation of the soil, and cannot visualize the internal deformation of the soil.
Although X-ray, γ-ray, computer tomography (CAT scan) and magnetic resonance imaging (MRI) can be used to measure the continuous deformation inside the soil, the high cost limits the wide application of these technologies

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vibration immersed tube compaction pile model test device and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1: (transparent solid material is perfluorocyclic polymer)

[0071] Depend on figure 1 It can be seen that a vibrating immersed tube compaction pile model test device includes a transparent model tank 1, which is provided with transparent soil simulating the soil around the pile 2, an immersed tube 3 with a pile shoe 4, and the center of the immersed tube 3 A grouting pipe 5 is provided, and a pile sinking mechanism installed on the support 13 is arranged on the top of the transparent model tank 1; Observing the digital camera 11 of the space of the transparent model tank 1, the digital camera 11 is connected with the processing device 12 through the data line; the laser beam irradiates the transparent model tank 1 to form a laser section forming the vertical or horizontal plane of the transparent model tank 1, which is recorded by the digital camera 11 The speckle field change and continuous deformation characteristics of the soil around the pile are analyz...

Embodiment 2

[0100] Embodiment 2: (transparent solid material is perfluorocyclic polymer)

[0101] In the process (1), select perfluorocyclic polymer particles 0.25㎜≤particle size<0.5㎜ as 10%, 0.5㎜≤particle size<1.0㎜ as 30%, and 1.0㎜≤particle size<1.5㎜ as 30% ﹪, 1.5㎜≤particle size≤2.0㎜ is 30%, the total is 100% by weight, and they are mixed evenly; the pore liquid is sodium chloride solution, and its concentration is 5%;

[0102] When mixing, first put the prepared pore liquid in the transparent model tank 1, and slowly, uniformly and dispersedly pour the perfluorocyclic polymer particles into the transparent model tank 1, and continuously stir to discharge the air bubbles during the pouring process. And keep the perfluorocyclic polymer particles always below the liquid level of the pore liquid;

[0103] The physical characteristics of the transparent soil made in this embodiment are: density 1.65g / ㎝ 3 , severe 17kN / m 3 , compactness 40%; mechanical properties: internal friction angle 3...

Embodiment 3

[0105] Embodiment 3: (transparent solid material is perfluorocyclic polymer)

[0106] In the process ⑴, select perfluorocyclic polymer particles 0.25㎜≤particle size<0.5㎜ as 10%, 0.5㎜≤particle size<1.0㎜ as 40%, and 1.0㎜≤particle size<1.5㎜ as 35% ﹪, 1.5㎜≤particle size≤2.0㎜ is 15%, the total is 100% by weight, and it is mixed evenly; the pore liquid is an alcohol solution, and its concentration is 15%;

[0107] When mixing, the density of the control sample is 40%.

[0108] The physical properties of the transparent soil made in this example are: density 1.83 g / ㎝ 3 , weight 17.5kN / m 3 , compactness 40%; mechanical properties: internal friction angle 31°, elastic modulus 15MPa, Poisson's ratio 0.32.

[0109] The rest are the same as embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a vibration immersed tube compaction pile model test device and a test method. The vibration immersed tube compaction pile model test device is characterized by comprising a transparent model groove, transparent soil for simulating soil around a pile and an immersed tube with pile shoes are arranged in the transparent model groove, a grouting pipe is arranged in the center of the immersed tube, and a pile sinking mechanism mounted on a support is arranged above the transparent model groove. A laser source is arranged on one side outside the transparent model groove, digital cameras capable of observing a transparent model groove space are arranged on a front view face and a top view face of the outside of the transparent model groove, and the digital cameras are connected with a processing device through data lines. The vibration immersed tube compaction pile model test device is easy and convenient to operate and high in repeatability; the prepared transparent soil and natural soil are good in soil nature similarity; according to the test method, the squeezing effect of a vibration immersed tube compaction pile under the conditions of different natures of the soil around the pile, different immersed tube section forms, different pile diameters and different pile lengths can be observed and measured in a visual mode; the vibration immersed tube compaction pile model test device and the test method have important significance in design and construction for guiding influences on surrounding buildings by pile-forming construction of vibration immersed tube piles.

Description

technical field [0001] The invention relates to a model test of a building pile foundation, in particular to a model test device and a test method for a vibrating tube sinking compaction pile model test device and a test method, in particular to a model test device and a test method for a visualized vibration sinking tube compaction pile model test device. Background technique [0002] The compaction pile is a pile formed by pressing or driving a steel pipe with a pipe plug, valve or cone head into the underground compacted soil layer to form a hole, and then putting lime, sand and other fillers into the hole. As compaction piles are soil-squeezing piles, the impact between adjacent foundation piles and the influence of foundation piles on surrounding structures during construction has always been one of the key issues concerned by engineering and technical personnel. [0003] In the model test of geotechnical engineering, it is of great significance to explore the nature of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
Inventor 孔纲强曹兆虎曹国辉
Owner HUNAN CITY UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap