Two-dimensional test model and method for simulating tunnel excavation stratum loss

A technology for stratum loss and tunnel excavation, which is applied in the field of underground engineering simulation test model and two-dimensional test model for simulating tunnel excavation stratum loss, can solve the problems of high cost and achieve the effect of easy operation

Pending Publication Date: 2022-05-20
WUHAN UNIV OF TECH +1
View PDF20 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent requires a self-made tunnel formation loss simulation device, which uses a complex device structure to achieve precise control of soil loss, but also faces high costs

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
  • Two-dimensional test model and method for simulating tunnel excavation stratum loss
  • Two-dimensional test model and method for simulating tunnel excavation stratum loss
  • Two-dimensional test model and method for simulating tunnel excavation stratum loss

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a two-dimensional test model for simulating formation loss in tunnel excavation, as shown in the attached Figure 2-5 As shown, including model box and soil layer system, formation loss simulation system, loading system and monitoring system; among them,

[0049] The model box and soil layer system includes a U-shaped movable steel frame 1, and similar soil 2 filled in the U-shaped movable steel frame 1, and the similar soil 2 wraps the air bag 3;

[0050] The formation loss system includes an airbag 3, which is provided with a barometer 7, and an air pressure regulating valve 6 and an air pump 8 at the gas nozzle of the airbag; the airbag 3 is used to simulate the tunnel model;

[0051] The loading system is arranged on the upper part of the U-shaped movable steel frame 1, including a force component plate 11 above the similar soil 2, and a plurality of jacks 10 are arranged on the force force plate 11; in this embodiment, there are 8 force for...

Embodiment 2

[0063] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0064] The similar soil is circular and is used to simulate the soil layer around the tunnel; the steel rod adopts three kinds of circular steel rods with different size cross-sections, which can reach the most dense state; The long axes are respectively 3mm, 4mm, 5mm similar soil; the longitudinal length of the steel bar is equal to the longitudinal length of the airbag.

Embodiment 3

[0066] This embodiment provides a two-dimensional test method for simulating formation loss during tunnel excavation, as shown in the attached figure 1 As shown, it is a flow chart of the steps of the test model of formation loss caused by tunnel excavation on formation deformation and surface settlement.

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a two-dimensional test model for simulating tunnel excavation stratum loss. The two-dimensional test model comprises a model box and soil layer system, a stratum loss simulation system, a loading system and a monitoring system, wherein the model box and soil layer system comprises a U-shaped movable steel frame and similar soil filled in the U-shaped movable steel frame; the stratum loss system comprises an air bag, a barometer is arranged on the air bag, and the air bag is connected with an air pressure regulating valve and an inflator pump; the loading system is arranged at the upper part of the U-shaped movable steel frame and comprises a component force plate above the similar soil, and a plurality of jacks are arranged on the component force plate; the monitoring system comprises an industrial camera, the industrial camera is arranged on a tripod, and a light compensator is arranged beside the industrial camera. The invention further discloses a two-dimensional test method for simulating the tunnel excavation stratum loss. The method is easy to operate, convenient and fast, the stratum loss rate can be accurately obtained, data can be more visually obtained, and the test phenomenon can be visually described.

Description

technical field [0001] The invention relates to an underground engineering simulation test model and method, in particular to a two-dimensional test model and method for simulating tunnel excavation stratum loss, and belongs to the technical field of underground engineering tests. Background technique [0002] The stratum loss caused by tunnel excavation will cause surface subsidence, and the study of stratum loss is of great significance to the protection of buildings around the tunnel, the safety of underground pipelines and the prevention of tunnel collapse. In actual engineering, the formation loss is the difference between the excavated soil volume and the built tunnel volume in shield tunneling construction. Factors causing formation loss include soil movement at the excavation face, retreat of the shield, grouting pressure, and over-excavation at the excavation face. [0003] Most of the existing methods for simulating formation loss use liquid bladder drainage, self...

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): G01N33/24G01C5/00G01B11/02
CPCG01N33/24G01C5/00G01B11/02
Inventor 王智德武海港刘奇甘万炜李杰司莹莹李根
Owner WUHAN UNIV OF TECH
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