A test device for force analysis of segment of mud-water balance shield tunnel in expansive soil area
A shield tunnel segment, mud-water balance technology, applied in the field of tunnel engineering and geological engineering, can solve the problems of expansion range of expansive soil and many interference factors that have not yet been obtained and cannot be analyzed
Inactive Publication Date: 2017-07-28
TONGJI UNIV
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Most of the previous studies used on-site monitoring methods. However, due to the complex on-site environment and many interference factors, it is often impossible to obtain a true and effective analysis of the expansion force on the segment and the expansion range of the expansive soil.
To sum up, there is currently no test device that can test the force of the mud-water balance shield tunnel segment in the expansive soil area.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0017] In a specific example, such as figure 1 As shown, the device includes model box 1, test expansive soil 2, test segment 3, movable plate 4, hydraulic jack 5, hydraulic pump 6, peristaltic pump 7, hose 8, capillary tube 9, earth pressure gauge 10, pore water Pressure gauge 11, strain gauge 12, data acquisition instrument 13.
[0018] The side elevation of the model box 1 is provided with a circular opening for testing the crossing of the segment 3 . The movable plate 4 comprises upper and lower two pieces, is located in the model box 1, and can move along the vertical direction, and the test expansive soil 2 is in the middle of the two movable plates 4 . Two hydraulic jacks 5 are located above the upper movable plate 4 and below the lower movable plate 4 respectively, and are used to apply vertical loads to the test expansive soil 2 .
[0019] The earth pressure gauge 10 and the pore water pressure gauge 11 are respectively arranged on the inner surface of the movable p...
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
Login to View More Abstract
The present invention is a force analysis test device for mud-water balance shield tunnel segment in expansive soil area, which is characterized in that the device includes a main frame, a measuring system and a water adding system; Segment; measurement system includes earth pressure gauge, pore water pressure gauge, strain gauge and data acquisition instrument; water adding system includes peristaltic pump, hose and capillary. The hydraulic jack applies axial load to the test expansive soil, and the water adding system uniformly delivers water to the contact zone between the test segment and the test expansive soil at a steady rate through the capillary. The soil pressure, pore water pressure and segment deformation data of each measurement point of the expansive soil in the test are collected and recorded by a data acquisition instrument. The invention can accurately measure the expansion force and expansive soil expansion range of the mud-water balance shield tunnel segment, makes up for the shortcomings of existing methods, and can provide mud-water balance shield tunnel expansive soil expansion performance parameters for related fields such as engineering geology and tunnel engineering. .
Description
technical field [0001] The invention belongs to the technical fields of geological engineering and tunnel engineering, and in particular relates to a force analysis test device for mud-water balance shield tunnel segments in expansive soil areas. Background technique [0002] In 1938, the U.S. Bureau of Reclamation first discovered the problem of expansive soil in a steel siphon project, which subsequently attracted widespread attention. By the 1960s, the problem of expansive soils had received extensive attention and related researches developed rapidly. Especially when it comes to mud-water balance shield tunnels, after the segment is installed, the residual slurry and groundwater continue to infiltrate into the surrounding soil of the tunnel, and the expansive soil expands and deforms after absorbing water, and generates expansion force under the constraints of the segment and the surrounding soil. Most of the previous studies used on-site monitoring methods. However, du...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/00G01L5/00
Inventor 王建秀刘笑天殷尧吴林波
Owner TONGJI UNIV