CN210982436U - Slurry shield excavation surface stratum simulation device - Google Patents

Slurry shield excavation surface stratum simulation device Download PDF

Info

Publication number
CN210982436U
CN210982436U CN201921658033.XU CN201921658033U CN210982436U CN 210982436 U CN210982436 U CN 210982436U CN 201921658033 U CN201921658033 U CN 201921658033U CN 210982436 U CN210982436 U CN 210982436U
Authority
CN
China
Prior art keywords
foam
stratum
transparent box
shield excavation
inlet pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201921658033.XU
Other languages
Chinese (zh)
Inventor
沈尔卜
李顺凯
吴克雄
吴琦
刘华
黄文杰
朱金彭
钟函
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cccc Shec Wuhan Port New Materials Co ltd
China Communications 2nd Navigational Bureau 3rd Engineering Co ltd
CCCC Wuhan Harbour Engineering Design and Research Institute Co Ltd
Original Assignee
Cccc Shec Wuhan Port New Materials Co ltd
China Communications 2nd Navigational Bureau 3rd Engineering Co ltd
CCCC Wuhan Harbour Engineering Design and Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cccc Shec Wuhan Port New Materials Co ltd, China Communications 2nd Navigational Bureau 3rd Engineering Co ltd, CCCC Wuhan Harbour Engineering Design and Research Institute Co Ltd filed Critical Cccc Shec Wuhan Port New Materials Co ltd
Priority to CN201921658033.XU priority Critical patent/CN210982436U/en
Application granted granted Critical
Publication of CN210982436U publication Critical patent/CN210982436U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The utility model discloses a slurry shield excavation face stratum analogue means, including the transparent box that contains simulation stratum, its characterized in that: the filter is laid on the bottom plate of the transparent box body, a water outlet is formed in the bottom plate, a foam generator is connected to the side wall of the transparent box body through a foam inlet pipe, and a water inlet pipe is further connected to the side wall of the transparent box body. The utility model discloses earlier carry out the water saturation water treatment of turning over through the inlet tube with dry soil sample, then let in the foam through the foam generator to the simulation stratum and foam, improved the porosity on simulation stratum and reduced dry density, be applicable to the simulation on less dry density stratum.

Description

Slurry shield excavation surface stratum simulation device
Technical Field
The utility model relates to a stratum analogue means belongs to tunnel shield technical field, specifically indicates a slurry shield excavation face stratum analogue means.
Background
With the continuous development of tunnel technology in China, the slurry shield technology is widely applied to the construction of urban subways, rivers crossing the river and submarine tunnels with the advantages of excellent pressure control mode, environmental protection, rapidness, low disturbance and the like. When the shield machine is used for tunneling, slurry needs to be injected into a stratum, a compact mud film is formed on the surface of the excavation surface, and the mud-water pressure acts on the mud film to balance the cement-water pressure in the stratum, so that the stability of the excavation surface is kept. Therefore, the construction has high requirements on the quality of the mud film, and the permeability coefficient is an important index for evaluating the quality of the mud film.
In order to measure the permeability coefficient of a mud membrane, a film formation simulation test of mud on a stratum is needed, the structure of the stratum is easy to damage due to stratum collection, and the single collection amount is small and can only meet the requirement of one test, so that a real stratum needs to be simulated, and the stratum simulation mainly refers to the data of the dry density, the compaction degree, the permeability coefficient, the porosity and the like of the stratum, particularly the data of the dry density, reflects the compaction degree of the stratum to a certain extent and directly influences the permeability coefficient and the porosity of the stratum.
Chinese patent CN207470190U discloses a device for simulating slurry film formation of slurry shield excavation face and measuring permeability coefficient of slurry film. In the device, a soil layer is simulated by the geotextile with the same porosity as the stratum, so that the slurry forms a film on the geotextile, but the compactness, the dry density and the stratum grain size grading of the geotextile cannot really simulate the stratum. In addition, manual or machine compaction methods are typically used for formation modeling with greater dry densities, but are not readily available for modeling with lesser dry densities.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects existing in the prior art and providing a simulation device for simulating a smaller dry density stratum.
In order to achieve the above object, the utility model provides a slurry shield excavation face stratum analogue means, including the transparent box who contains simulation stratum, its characterized in that: the filter is laid on the bottom plate of the transparent box body, a water outlet is formed in the bottom plate, a foam generator is connected to the side wall of the transparent box body through a foam inlet pipe, and a water inlet pipe is further connected to the side wall of the transparent box body.
Furthermore, the upper end and the lower end of the transparent box body are provided with openings, and the upper end and the lower end of the transparent box body are fixed with the sealing baffle through clamps.
Further, the foam generator is respectively connected with a foam liquid inlet pipe and an air inlet pipe.
Furthermore, a water inlet valve is arranged on the water inlet pipe, and a foam inlet valve and a foam filter screen are arranged on the foam inlet pipe.
Furthermore, the water inlet pipe with advance the foam pipe and be a plurality of, it is a plurality of water inlet pipe and advance the foam pipe and arrange along transparent box direction of height.
The utility model has the advantages that: a less dry density formation is simulated. The utility model discloses earlier carry out the water saturation water treatment of turning over through the inlet tube with dry soil sample, then let in the foam through the foam generator to the simulation stratum and foam, improved the porosity on simulation stratum and reduced dry density, be applicable to the simulation on less dry density stratum.
Drawings
Fig. 1 is a front view of the structure of the stratum simulator of the present invention.
The components in the figures are numbered as follows: the device comprises a transparent box body 1, a sealing baffle 101, a clamp 102, volume scale marks 103, a simulated stratum 2, a filter layer 3, a water outlet 4, a water inlet pipe 5, a water inlet valve 6, a foam inlet pipe 7, a foam inlet valve 8, a foam filter screen 9, a foam generator 10, a foam inlet pipe 11 and an air inlet pipe 12.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the scope of the present invention.
As shown in fig. 1, the muddy water shield excavation surface stratum simulation device comprises a transparent box body 1 filled with a simulation stratum 2, wherein the upper end and the lower end of the transparent box body 1 are provided with openings, and the upper end and the lower end of the transparent box body 1 are fixed with a sealing baffle 101 through a clamp 102; the bottom plate upper berth of transparent box 1 is equipped with filter layer 3 and opens there is outlet 4, is connected with foam generator 10 through advancing foam pipe 7 on the transparent box 1 lateral wall, advances foam valve 8 and foam filter screen 9 on advancing foam pipe 7, and foam generator 12 is connected with into foam liquid pipe 11 and intake pipe 12 respectively, still is connected with inlet tube 5 on the transparent box 1 lateral wall, is equipped with water intaking valve 6 on the inlet tube 5.
In the above technical solution, the transparent box 1 has the volume scale mark 103 on the sidewall thereof, which can display the volume of the simulated formation, thereby controlling the dry density thereof.
In the above technical scheme, the water inlet pipe 5 and the foam inlet pipe 7 are multiple, and the multiple water inlet pipes 5 and the foam inlet pipes 7 are arranged along the height direction of the transparent box body. This may allow for more complete and uniform reverse saturation and foaming of the simulated formation.
The utility model discloses a stratum analogue means simulation process as follows: calculating the mass and volume of a required simulated stratum according to the dry density of the stratum, selecting dry soil samples with various particle sizes as the simulated stratum, firstly opening a water inlet valve and closing a foam inlet valve, carrying out water-reversing saturation treatment on the dry soil samples through a water inlet pipe, closing the water inlet valve when water completely covers the soil samples, and opening a water outlet after waiting for 5-10 min to discharge redundant water until the upper surface of the soil samples is anhydrous; and then opening a foam inlet valve, fully mixing foam liquid and air in a foam generator to form compact foam, allowing the foam to pass through a filter screen and enter a soil sample for expansion, determining the size of the foam liquid by the size of pores of the filter screen so as to determine the size of pores inside the stratum, closing the foam inlet valve after the soil sample expands to a preset volume, and accurately simulating the parameters of dry density, compactness, porosity, permeability coefficient and the like of the stratum by the soil sample at the moment, namely restoring the real condition of the stratum, thereby being beneficial to the development of a subsequent mud film test.

Claims (5)

1. The utility model provides a muddy water shield excavation face stratum analogue means, includes transparent box (1) of interior filling simulation stratum (2), its characterized in that: the bottom plate upper berth of transparent box (1) is equipped with filter layer (3) and opens there is outlet (4), be connected with foam generator (10) through advancing foam pipe (7) on transparent box (1) lateral wall, still be connected with inlet tube (5) on transparent box (1) lateral wall.
2. The slurry shield excavation face stratum simulation device of claim 1, characterized in that: the upper end and the lower end of the transparent box body (1) are provided with openings, and the upper end and the lower end of the transparent box body (1) are fixed with the sealing baffle (101) through the clamp (102).
3. The slurry shield excavation face stratum simulation device of claim 2, characterized in that: the foam generator (10) is respectively connected with a foam liquid inlet pipe (11) and an air inlet pipe (12).
4. The slurry shield excavation face stratum simulation device of claim 3, characterized in that: the water inlet pipe (5) is provided with a water inlet valve (6), and the foam inlet pipe (7) is provided with a foam inlet valve (8) and a foam filter screen (9).
5. The slurry shield excavation face stratum simulation device of claim 4, characterized in that: the inlet tube (5) with advance foam pipe (7) and be a plurality of, it is a plurality of inlet tube (5) with advance foam pipe (7) and arrange along transparent box direction of height.
CN201921658033.XU 2019-09-30 2019-09-30 Slurry shield excavation surface stratum simulation device Active CN210982436U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921658033.XU CN210982436U (en) 2019-09-30 2019-09-30 Slurry shield excavation surface stratum simulation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921658033.XU CN210982436U (en) 2019-09-30 2019-09-30 Slurry shield excavation surface stratum simulation device

Publications (1)

Publication Number Publication Date
CN210982436U true CN210982436U (en) 2020-07-10

Family

ID=71424172

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921658033.XU Active CN210982436U (en) 2019-09-30 2019-09-30 Slurry shield excavation surface stratum simulation device

Country Status (1)

Country Link
CN (1) CN210982436U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114878789A (en) * 2022-07-13 2022-08-09 成都理工大学 Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114878789A (en) * 2022-07-13 2022-08-09 成都理工大学 Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis

Similar Documents

Publication Publication Date Title
CN108181220A (en) The experimental rig of coarse-grained soil horizontal direction and vertical saturation permeability coefficient under different pressures is tested in a kind of interior simultaneously
CN105651677B (en) A kind of Geotechnical Parameter property analyzer that can measure specific yield and infiltration coefficient simultaneously
CN105891084B (en) Dismountable mud film forming and mud film tightness test device and method
CN105136638A (en) Tailing dam seepage field similarity simulation test system and method
CN106525526B (en) A kind of measuring method of the high pressure water injection of raw coal containing gas and radial gas permeation rate
CN105334142B (en) A kind of experimental provision formed for simulating shield mud film
CN110275009A (en) Dike piping simulation test device and test method under a kind of high water level
CN108088982A (en) Simulate the Experimental Method in Laboratory of fine grained seepage inflow erosion inside deep aquifers sand
CN109269959A (en) A kind of large size water level controllable type soil permeability coefficient measurement device and measuring method
CN111337650A (en) Multifunctional test device for researching underground engineering soil body seepage failure mechanism
CN102645395B (en) Diaphragm wall permeability tester
CN105911249A (en) Test method for simulating erosion loss of sandy soil layer surrounding shield tunnel segment seam
CN106198890A (en) A kind of indoor grouting simulation test device and using method thereof
CN207779861U (en) It is a kind of indoor to test the experimental rig of coarse-grained soil horizontal direction and vertical saturation permeability coefficient under different pressures simultaneously
CN210982436U (en) Slurry shield excavation surface stratum simulation device
CN206907330U (en) A kind of goaf filling analogue experiment installation
CN115290533A (en) Centrifugal model test device and method for simulating soil body permeation
CN203365432U (en) Soil-water characteristic curve testing instrument applicable to special coarse-grained soil
CN207908318U (en) Piping experimental rig in a kind of unstable aggressivity
CN106898231A (en) A kind of goaf filling analogue experiment installation and operating method
CN110715776B (en) Building enclosure leakage pre-detection device and pre-detection method thereof
CN209606054U (en) Karst Tunnel model assay systems
CN209708465U (en) Soil body penetration crash simulation device
CN105957441A (en) Plane flow net drawing and seepage principle teaching test device and test method
CN206920294U (en) A kind of permeation coefficient of permeable concrete determines device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant