CN114034845A - Visual test device for simulating grouting of grouting holes in different positions of duct piece and test method thereof - Google Patents
Visual test device for simulating grouting of grouting holes in different positions of duct piece and test method thereof Download PDFInfo
- Publication number
- CN114034845A CN114034845A CN202110607119.5A CN202110607119A CN114034845A CN 114034845 A CN114034845 A CN 114034845A CN 202110607119 A CN202110607119 A CN 202110607119A CN 114034845 A CN114034845 A CN 114034845A
- Authority
- CN
- China
- Prior art keywords
- grouting
- transparent
- soil
- model box
- duct piece
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 76
- 230000000007 visual effect Effects 0.000 title claims abstract description 38
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 239000002689 soil Substances 0.000 claims abstract description 101
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000011440 grout Substances 0.000 claims abstract description 17
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 31
- 239000002002 slurry Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 28
- 239000011521 glass Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 14
- 239000000700 radioactive tracer Substances 0.000 claims description 11
- 238000007569 slipcasting Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 10
- 238000009792 diffusion process Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 8
- 230000000704 physical effect Effects 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 7
- 239000011083 cement mortar Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 210000003722 extracellular fluid Anatomy 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 241000252254 Catostomidae Species 0.000 claims description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 3
- 229910001622 calcium bromide Inorganic materials 0.000 claims description 3
- WGEFECGEFUFIQW-UHFFFAOYSA-L calcium dibromide Chemical compound [Ca+2].[Br-].[Br-] WGEFECGEFUFIQW-UHFFFAOYSA-L 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000005350 fused silica glass Substances 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000002071 nanotube Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000012800 visualization Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 9
- 238000011160 research Methods 0.000 description 8
- 230000001360 synchronised effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000917 particle-image velocimetry Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013499 data model Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a visual test device for simulating grouting of grouting holes in different positions of a duct piece. The invention also provides a test method of the visual test device for simulating grouting of the grouting holes in different positions of the duct piece. The device has the following technical effects: 1. the grouting simulation can be performed on the partial duct piece, the size of a matched model box is small, less transparent soil, cement grout and water glass grout are required for the test, the test cost can be saved, and the test period is shortened; 2. the side length of the model box in the transverse direction and the longitudinal direction is not large, so that the visualization advantage of the transparent device cannot be influenced by overlong perspective depth; 3. the device is provided with a rotary support, and can simulate the grouting condition of grouting holes at any position on a pipe sheet ring in actual engineering; 4. the matched test image measurement technology has high precision, can measure the soil motion information in the designated area range, and carries out longer-time continuous measurement.
Description
Technical Field
The invention relates to a visual test device for simulating grouting of grouting holes in different positions of a duct piece.
Background
At present, the tunnel construction of the city is widely constructed by adopting a shield method which has strong geological condition adaptability and high construction speed, and the method can greatly relieve the problem of urban traffic jam brought during the construction period.
In the shield construction process, the ground subsidence is data needing important detection, and the data is influenced by a plurality of factors.
Wherein, the influence of the construction effect of the shield grouting on the surface subsidence is obvious. In the propelling process of the shield machine, the shield tail shell can be separated from the assembled duct pieces, the original position of the shield tail shell can correspondingly form a thin-wall annular gap, and the duct pieces can be in a suspended state separated from the shield body. The effect of synchronous slip casting immediately and secondary slip casting afterwards plays decisive role to the deformation of the peripheral soil body of section of jurisdiction, and then influences the earth's surface and subsides.
Therefore, the deep research on the filling and seepage mechanism of shield grouting has important guiding significance and reference value for practical engineering.
The research on shield grouting mainly comprises theoretical research, numerical simulation and indoor test through document retrieval of the prior art. The device for laboratory test comprises:
the invention patent of Chongqing university (application publication No. CN108490152A) provides a novel transparent soil model test device for simulating tunnel excavation and a test method thereof. The test device comprises a model box arranged on a test platform, a simulated tunnel structure and an imaging device. The model box is a transparent rectangular box body. Holes are prefabricated on two opposite side wall surfaces of the model box. And two ends of the simulated tunnel structure are respectively embedded into the holes on the two side wall surfaces of the model box. Transparent soil is filled in the model box. During the test, two laser transmitters form two speckle sections in the transparent soil. The device is at the in-process of removing the organic glass pipe, through reading the scale value on organic glass pipe surface to obtain the stratum loss that moves each time and produce. The device reduces the size of the model box through the reduced scale, reduces the test cost and ensures the visual effect. However, the diffusion of the slurry of the shield backfill grouting has complexity and uncertainty, and many influencing factors such as the particle composition of the slurry, the porosity of sand samples, the seepage diffusion of water, the coupling effect of the slurry and the soil body and the like. And a plurality of related physical quantities are difficult to meet the requirements through simple similarity criteria, and corresponding substances are difficult to find in real life through the materials of the serous fluid and the soil body materials after similar changes. And the physical quantities such as viscous force, gravity, inertia force and the like are difficult to satisfy the similarity at the same time. It is very difficult to completely adopt a similar model.
The utility model patent of southwest traffic university (application publication No. CN209821195U) carries out visual test through the shield constructs the machine in the transparent soil of grading and the layering condition of soil layer in having simulated actual engineering, the experiment has contained the multiple construction process of actual engineering (consider the tunnelling, synchronous slip casting, the section of jurisdiction is assembled and processes such as secondary slip casting), can be to the seepage flow form of thick liquid, the section of jurisdiction carries out corresponding monitoring to thick liquid extrusion, and the monitoring through displacement between the stratum is evaluateed the slip casting effect, strive to restore actual operating mode lifelikely as far as possible. However, the test cost is too high, the test equipment is complex, the test period is long, the size of the model box is too large, the visual effect brought by the transparent soil is directly influenced, and the feasibility of the test in the actual operation and data acquisition needs to be investigated.
An invention patent (application publication No. CN108872297A) of Zhengzhou university provides a shield tail grouting slurry coagulation and segment floating process model test device. Soil at the bottom of the duct piece and the influence range of the duct piece is taken to be made into a model box, and the problem that the duct piece floats upwards due to improper synchronous grouting in the tunneling process of a shield tunneling machine is simulated. The device is suitable for researching the grouting condition below the shield bottom segment. The diffusion and the infiltration condition of the slip casting hole in different positions under the action of gravity can not be considered, and the research range of the test device has certain limitation.
To sum up, the technical problems of the related technology and the test device of the current shield grouting are as follows: the method has the problems of high test cost, unsatisfactory visualization effect, limited research range and the like, and also has the problem that the engineering test can not be carried out closer to the actual engineering condition.
Disclosure of Invention
The invention aims to solve the technical problem of providing a visual test device for simulating grouting of grouting holes in different positions of a duct piece, which has low test cost and simple device processing, can simulate grouting of the grouting holes in different positions by depending on a rotating arm support so as to research the influence of gravity on slurry diffusion, realizes omnibearing three-dimensional real-time observation of a grouting process by adopting a three-dimensional image reconstruction technology based on a fully transparent framework, and can provide effective guidance and suggestion for grouting construction in different positions of actual shield engineering. The invention also provides a test method of the visual test device for simulating grouting of grouting holes in different positions of a duct piece.
Therefore, the visual test device for simulating grouting of the grouting holes in different positions of the duct piece, provided by the invention, is characterized in that: the system comprises a double-liquid grouting system, a model box system, a bracket system and a data acquisition and processing system;
two-fluid grouting system: the double-liquid grouting machine comprises a cement mortar storage barrel and a water glass mortar storage barrel, wherein the cement mortar storage barrel and the water glass mortar storage barrel are connected with a double-liquid grouting machine through pipelines, and the double-liquid grouting machine is connected with a model box;
a mold box system: the double-liquid grouting machine comprises a rectangular organic glass model box, wherein the model box is provided with an upward opening, transparent soil is filled at the bottom of the model box, a grouting gap is reserved above the transparent soil, a grouting hole communicated with the grouting gap is formed in the side wall of the model box, the double-liquid grouting machine is connected with the grouting hole through a pipeline, a pipe piece is detachably and fixedly arranged above the grouting gap, the pipe piece is made of transparent organic glass, a secondary grouting reserved hole is formed in the pipe piece, a pressure-limiting drain hole is formed in the model box and connected with a hydraulic pump, and liquid sealing treatment is carried out on the matching position of the pipe piece and the inner wall of the model box;
a bracket system: the device comprises a rotating arm and a fixed support thereof, wherein the rotating arm is rotatably connected with a model box and is connected with the fixed support in a swinging way;
the data acquisition and processing system comprises: the system comprises a plurality of CMOS digital cameras, a plurality of lasers, a plurality of data lines and a computer for processing and storing data, wherein the plurality of CMOS digital cameras are connected with the computer.
Preferably, a buffer, a flow speed regulating valve and a slurry pressure gauge are arranged on a hose connected between the grouting hole and the double-fluid grouting machine; a connecting through hole is formed in the side wall of the mold box corresponding to the duct piece, the fixing bolt penetrates through the connecting through hole to be in threaded connection with the duct piece to achieve locking, the seam between the duct piece and the inner side wall of the mold box is sealed through a glass cement sealing strip, and the glass cement sealing strip is provided with a plurality of vacuum suckers.
Preferably, the transparent soil has similar specific gravity with a natural soil body of a required simulation environment, good stability, stable chemical property, no chemical reaction with interstitial fluid, no change of physicochemical property along with time change, high pressure resistance, anisotropy and good transparency.
Preferably, the transparent soil is made of amorphous silica gel and powder and/or transparent glass sand and/or fused quartz sand.
Preferably, the transparent soil with the same gradation and water content is configured in the model box, and carbon nanotube particles are added into the transparent soil to serve as tracer particles.
Preferably, the fluid injected into the transparent soil has the same or similar refractive index as the transparent soil, so that the transparent soil has transparent or near-transparent properties.
Preferably, the pore water of the transparent soil is a calcium bromide solution or a mixed solution prepared by an alkane solvent and mineral oil.
Preferably, the side wall of the mold box is provided with a socket corresponding to the position of the grouting gap, a transparent plate is inserted into the grouting gap from the socket and blocks the transparent soil, grouting holes are formed in the opposite sides of the socket on the mold box, and a handle is arranged at the outer end of the transparent plate and a grouting pipeline is arranged in the transparent plate.
Preferably, the section of jurisdiction is circular-arc, the transparent plate is circular-arc with the section of jurisdiction matching, the section of jurisdiction size reduces for the equal proportion of the supporting section of jurisdiction of actual shield structure machine.
The invention provides a test method of a visual test device for simulating grouting of grouting holes in different positions of a duct piece, which comprises the following steps of:
the method comprises the following steps:
firstly, collecting geological survey data and segment size data of actual engineering, respectively customizing a model box and a transparent soil raw material according to the geological survey data and the segment size, preparing according to an actual soil sample, and adding nanotube particles as tracer particles; then, performing direct shear test and triaxial test on the prepared soil sample and the soil sample in the actual engineering to determine the physical properties of the soil sample, and comparing and determining that the physical properties of the simulated transparent soil sample are similar to those of the actual soil sample;
step two:
preparing a double-slurry raw material: cement grout and water glass grout are respectively filled into a corresponding cement grout storage barrel and a corresponding water glass grout storage barrel; connecting the slurry storage barrel of the two kinds of slurry with a double-liquid grouting machine by using a hose and a three-way pipe, connecting a slurry outlet of the double-liquid grouting machine with the hose provided with a buffer, a flow speed regulating valve and a slurry pressure gauge, connecting the other end of the hose to a grouting port on the side wall of an organic glass mold box, ensuring the sealing property of a connector and preventing leakage;
step three:
connecting a pressure-limiting water outlet of the model box with a hydraulic pump, then loading the prepared transparent soil into the model box for compaction, slowly embedding the pipe piece into the model box through a vacuum sucker group, aligning the pipe piece with a hole site at a preset position, and fixing the position of the simulated pipe piece by using a bolt; then, performing ring sealing along the rectangular embedding gap by using glass cement to prevent the slurry from overflowing along the gap;
step four:
the base of the rotating arm is fixed on the ground, and the angle of the rotating arm is adjusted according to the test requirement to determine the spatial position of the model box;
step five:
the laser and the camera bracket are arranged according to the position of the model box, and the digital camera and the computer are connected by a data line. Installing a CMOS digital camera on the camera fixing support, adjusting the shooting visual field, and adjusting the aperture and the focal length to enable the tracer particles to be imaged clearly in the visual field;
step six:
in the test process, a picture of soil and tracer particle particles in a shooting visual field in the grouting process is recorded through a CMOS digital camera and is transmitted to a computer for processing through a data acquisition system; firstly, calculating a control point center of a calibration point for converting an image and a space coordinate, secondly, determining an analysis area, dividing the analysis area into a plurality of grids, then calculating a pixel coordinate of each grid in each frame of image by using a correlation coefficient, carrying out filtering analysis on output data by using the correlation coefficient, manually deleting the output data with errors, and finally converting the pixel coordinate into the space coordinate to obtain deformation information of a soil body and filling and diffusion conditions of slurry.
The invention provides the following technical effects:
(1) the test of the model is the local segment grouting simulation, and the size of the model box is smaller due to the reasonable structure, so that less transparent soil, cement grout and water glass grout are required in each test, the cost of test materials is greatly saved, and the test period is shortened.
And because the length of the side of the model box in the transverse direction and the longitudinal direction is not large, the visualization advantage of the transparent device cannot be influenced due to the overlong perspective depth.
(2) The device is provided with the rotating arm and the fixed support thereof, and the model box can stay at any position by rotating the rotating arm, so that the grouting situation of the grouting hole at any position on the pipe sheet ring of the actual engineering can be simulated, the influence of gravity on the slurry diffusion can be further researched, the research and research range of the device is wider, the test variable can be adjusted as required, and reference basis can be provided for the grouting design scheme of the grouting holes at different positions.
(3) The invention adopts the transparent model box and the transparent soil to form an omnibearing three-dimensional transparent structure, realizes omnibearing three-dimensional real-time observation of the grouting process by adopting a three-dimensional image reconstruction technology based on a full transparent framework, and can provide effective guidance and suggestion for grouting construction at different positions of the actual shield engineering.
The high-precision test image measurement technology can measure soil motion information in a specified area range, has high data resolution and can carry out long-time continuous measurement.
(4) The method is different from other large-scale shrinkage tests (only meeting the similarity of partial physical quantities), ensures the validity of test results, and can provide effective reference for grouting construction in actual engineering.
(5) Transparent soil with the same gradation and water content is configured in the model box, and carbon nano tube particles are added into the transparent soil to serve as tracer particles, so that the motion change of the soil body can be better displayed.
(6) The transparent plate is inserted into the grouting gap from the socket, the transparent plate blocks the transparent soil, the grouting pipeline is arranged in the transparent plate, the transparent soil can be outwards pulled out from the edge of the transparent plate through the edge in the test operation, and the transparent soil is effectively supported in time by the real-time synchronous grouting mode of the grouting pipeline in the transparent plate so as to better simulate the grouting process of the shield machine and more accurately simulate the grouting condition in the operation process of the shield machine.
And, because of the section of jurisdiction is circular-arc, the transparent plate is circular-arc with the section of jurisdiction matching to make the section of jurisdiction more be close to the tunnel segment form that real shield constructs the machine matching, obtain more accurate test data.
Drawings
Fig. 1 is a schematic diagram of relationship among systems of a visual test device for simulating grouting of grouting holes in different positions of a duct piece according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a visual test device for simulating grouting of grouting holes in different positions of a duct piece according to embodiment 1 of the present invention.
Fig. 3 is a schematic front view of a mold box of a visual testing apparatus for simulating grouting of grouting holes in different positions of a duct piece according to embodiment 1 of the present invention.
Fig. 4 is a schematic side view of a mold box of a visual testing apparatus for simulating grouting of grouting holes in different positions of a duct piece according to embodiment 1 of the present invention.
Fig. 5 is a schematic top view of a mold box of a visual testing device for simulating grouting holes in different positions of a duct piece for use in an embodiment 1 of the invention.
Fig. 6 is a schematic front view of a mold box of a visual testing apparatus for simulating grouting of grouting holes in different positions of a duct piece according to embodiment 2 of the present invention.
Fig. 7 is a schematic cross-sectional view taken along line a-a of the sliding groove and the sliding block of fig. 6, in which the transparent plate is engaged with the support plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1 to 5, a visual test device for simulating grouting of grouting holes in different positions of a duct piece provided in embodiment 1 of the present invention includes a two-fluid grouting system, a mold box system, a support system, and a data acquisition and processing system;
two-fluid grouting system: the device comprises a cement mortar storage barrel 1 and a water glass mortar storage barrel 2, wherein the cement mortar storage barrel 2 and the water glass mortar storage barrel 2 are connected with a double-liquid grouting machine 3 through pipelines, and the double-liquid grouting machine 3 is connected with a model box 4;
a mold box system: the device comprises a rectangular organic glass model box 4, wherein the model box 4 is provided with an upward opening, the bottom of the model box 4 is filled with transparent soil 5, a grouting gap 6 is reserved above the transparent soil 5, a grouting hole 7 communicated with the grouting gap 6 is formed in the side wall of the model box 4, a double-liquid grouting machine 3 is connected with the grouting hole 7 through a pipeline, a detachable and fixable pipe piece 8 is arranged above the grouting gap 6, the pipe piece 8 is made of transparent organic glass, a secondary grouting preformed hole 9 is formed in the pipe piece 8, a pressure limiting drain hole 10 (provided with a filter screen for preventing pipe blockage) is arranged on the model box 4, the pressure limiting drain hole 10 is connected with a hydraulic pump 11 (ensuring pressure limiting drainage of the model box to prevent the inside of the model box from being in an absolute closed state and further causing rapid increase of pore water pressure in a soil body during grouting), and liquid can not be leaked by applying proper pressure, but also can be kept in a pressurization state to simulate the pore pressure dissipation in the natural environment. Performing liquid sealing treatment on the matching position of the duct piece 8 and the inner wall of the model box 4; in order to prevent the box body from being in a sealed state, the pressure-limiting water outlet on the right side of the box body is connected with the hydraulic pump to ensure pressure-limiting water drainage of the box body, and the arrangement of the filter screen at the pressure-limiting water outlet prevents soil particles from being brought out of the box body by fluid to cause clogging of the hose. The secondary grouting preformed hole of the duct piece is in a sealed closed state during synchronous grouting, and is opened for use in a secondary grouting link.
A bracket system: including swinging boom 23 and fixing support 12, swinging boom 23 and the rotatable connection of model case 4, swinging boom 23 with fixing support 12 swing is connected, and swinging boom 23 is provided with unblock and locking mechanical system with model case 4 and fixing support 12's rotation junction, and fixing support 12 adopts the screw rod to fix on ground or mesa, can make the department of rotation can target in place the back through screwing up and locking, can realize like bolt mechanism. The bracket system for controlling the space position of the model box system is connected with the steel structure frame by the rotating arm 23 to control the position and the angle of the model box 4, and the grouting conditions of the synchronous grouting holes 7 and the secondary grouting holes 9 at different positions on the pipe sheet in the actual engineering are simulated by changing the rotating angle of the model box 4. And (5) researching the real-time filling and diffusion conditions of grouting under the gravity of different angles. And further, the application range of the test device is greatly improved on the basis of not increasing too much test cost.
The data acquisition and processing system comprises: the system comprises three CMOS digital cameras 13, three lasers 14, a plurality of data lines and a computer for processing and storing data, wherein the three CMOS digital cameras 13 are connected with the computer.
In the above structure of the invention, the data collecting and processing system adopts a Particle Image Velocimetry (PIV) technology, and the fluid measurement technology is a transient, multi-point and non-contact fluid mechanics velocity measurement method developed in the late seventies. The PIV technology is characterized by exceeding the limitation of single-point velocity measurement technology (such as LDA), being capable of recording velocity distribution information on a large number of spatial points in the same transient state and providing abundant flow field spatial structure and flow characteristics. Scanning the transparent soil by using sheet light of a laser to form a speckle section, simultaneously shooting high-precision images from different angles by using three high-pixel cameras which are orthogonally arranged in space, analyzing and calculating three-dimensional space coordinates of particles, and obtaining three-dimensional velocity vectors of the particles according to three-dimensional space displacement after particle matching so as to obtain the displacement condition of soil body particles. Three synchronous cameras are arranged in the space orthogonal direction, the outline of the grouting body can be obtained, the aim of multi-view reconstruction can be achieved by adopting a three-dimensional reconstruction method based on the outline, and then the filling and seepage processes of the slurry are obtained.
Referring to fig. 2, a buffer, a flow rate regulating valve and a slurry pressure gauge are arranged on a hose connected between the grouting hole 7 and the double-fluid grouting machine 3; a connecting through hole is formed in the side wall of the mold box corresponding to the duct piece, the fixing bolt penetrates through the connecting through hole to be in threaded connection with the duct piece to achieve locking, the seam between the duct piece and the inner side wall of the mold box is sealed through a glass cement sealing strip, and the glass cement sealing strip is provided with a plurality of vacuum suckers.
In the above example 1, the transparent soil 5 has a similar specific gravity to that of a natural soil body to be simulated for geological conditions, is good in stability, stable in chemical properties, does not chemically react with interstitial fluid, does not change in physicochemical properties with time, is high-pressure resistant, and has good transparency; the transparent soil 5 is made of amorphous silica gel and powder and/or transparent glass sand and/or fused quartz sand. From the basic knowledge of optics, in order to make the prepared soil body present transparent or nearly transparent properties, it is necessary to make the interstitial fluid and the solid particles have the same or similar refractive indexes, so in this embodiment, the fluid injected into the transparent soil and the transparent soil have the same or similar refractive indexes, so as to make the transparent soil present transparent or nearly transparent properties, the pore water of the transparent soil is calcium bromide solution or mixed solution prepared by alkane solvent and mineral oil, and these liquids can be used as the pore fluid because their concentration or proportion has corresponding relation with the refractive index, which provides possibility for accurately preparing the pore fluid matched with the refractive index of the transparent soil. The theoretical basis for pore water selection is: in natural soils, the pore liquid is primarily water. The most basic requirement of the material for simulating pore fluid is to have or approach the physical properties of water (density, viscosity and other stable chemical properties, no chemical reaction between fluid mixed liquid and between fluid and solid particles, and good transparency).
Referring to fig. 3 to 5, the transparent soil 5 having the same gradation and water content is disposed in the mold box 4, and carbon nanotube particles are added to the transparent soil 5 as tracer particles. Meanwhile, for better positioning coordinates, a coordinate shallow circular groove (not opening the wall of the glass box) is dug at the outer side of the transparent glass wall plate forming the model box 4, and a positioning coordinate point 15 is filled and dyed by black paint.
Referring to fig. 1 to 5, the testing method of the visual testing apparatus for simulating grouting of grouting holes in different positions of a duct piece provided in embodiment 1 includes the following steps:
the method comprises the following steps:
firstly, collecting geological survey data and segment size data of actual engineering, respectively customizing a model box and a transparent soil raw material according to the geological survey data and the segment size, preparing according to an actual soil sample, and adding nanotube particles as tracer particles; then, performing direct shear test and triaxial test on the prepared soil sample and the soil sample in the actual engineering to determine the physical properties of the soil sample, and comparing and determining that the physical properties of the simulated transparent soil sample are similar to those of the actual soil sample;
step two:
preparing a double-slurry raw material: cement grout and water glass grout are respectively filled into a corresponding cement grout storage barrel and a corresponding water glass grout storage barrel; connecting the slurry storage barrel of the two kinds of slurry with a double-liquid grouting machine by using a hose and a three-way pipe, connecting a slurry outlet of the double-liquid grouting machine 3 with a hose provided with a buffer, a flow speed regulating valve and a slurry pressure gauge, connecting the other end of the hose to a grouting port on the side wall of an organic glass mold box, ensuring the sealing property of a connector and preventing leakage;
step three:
connecting a pressure-limiting water outlet 10 of the model box 4 with a hydraulic pump 11, then placing the prepared transparent soil 5 into the model box 4 for compaction, slowly inlaying the pipe piece 8 into the model box 4 through a vacuum chuck group 16, aligning the pipe piece 8 with a hole position at a preset position, and fixing the position of the simulated pipe piece 8 by using a bolt; then, performing ring sealing along the rectangular embedding gap by using glass cement to prevent the slurry from overflowing along the gap;
step four:
the base 12 of the rotating arm 23 is fixed on the ground, and the angle of the rotating arm 23 is adjusted according to the test requirement to determine the spatial position of the model box 4;
step five:
the laser 14 and the camera mount are arranged according to the position of the model box 4, and the digital camera 13 and the computer are connected by a data line. Installing a CMOS digital camera 13 on the camera fixing support, adjusting the shooting visual field, and adjusting the aperture and the focal length to enable the tracing particles to be imaged clearly in the visual field;
step six:
in the test process, a picture of soil and trace particle particles in a shooting view field in the grouting process is recorded through the CMOS digital camera 13 and is transmitted to a computer for processing through a data acquisition system; firstly, calculating the center of a control point of a calibration point 15 for converting an image and a space coordinate, secondly, determining an analysis area, dividing the analysis area into a plurality of grids, then, calculating the pixel coordinate of each grid in each frame of image by using a correlation coefficient, carrying out filtering analysis on output data by using the correlation coefficient, manually deleting the output data with errors, and finally, converting the pixel coordinate into the space coordinate to obtain the deformation information of the soil body. Three synchronous cameras are arranged in the space orthogonal direction, the outline of the grouting body can be obtained, the purpose of multi-view reconstruction can be achieved by adopting a three-dimensional reconstruction method based on the outline, and then the filling and seepage conditions of the slurry are obtained.
Referring to fig. 6 to 7, embodiment 2 of the present invention is substantially the same as embodiment 1 except that the following configuration is added: socket 17 has been seted up corresponding to the slip casting space position to the model case 4 lateral wall, and transparent plate 18 inserts in slip casting space 6 from socket 17, and the cooperation department of transparent plate 18 and socket 17 is provided with the sealing strip to make transparent plate 18 take out and all can keep the leakproofness of seam crossing after inserting, transparent plate 18 blocks transparent soil 5, be equipped with the slip casting pipeline in the transparent plate 18 and the outer end has the handle.
Referring to fig. 2, 6 and 7, in order to move the transparent plate 18 more smoothly, a support plate 19 is fixedly arranged near the socket 17 of the mold box 4, the support plate 19 is provided with a sliding groove 20 with an inverted T-shaped cross section, a sliding block 21 is arranged below the outer end of the transparent plate 18, the sliding block 21 is T-shaped, and the sliding block 21 is sleeved in the sliding groove 20.
In the above example 2, the soil test (direct shear test, triaxial test, etc.) can be performed on the prepared transparent soil 5 to check whether the physical properties thereof are close to those of the actual soil body. The prepared transparent soil is filled into the model box 4 in layers and is compacted by applying proper early consolidation pressure.
The operating method of the above example 2 is increased as follows: during operation, the transparent plate 18 can be pulled out while grout is injected from the grouting pipeline 22, so that the transparent soil 5 can be blocked by the transparent plate 18, collapse of the transparent soil 5 is avoided, the state of a grouting gap above the pipe wall during grouting can be simulated, the actual operation state of the shield can be more approximate, and a more accurate data model can be obtained.
Inventive example 3 is essentially the same as example 1, with the only difference that: for the section of jurisdiction form when better simulation shield constructs the operation, section of jurisdiction 8 is circular-arcly, transparent plate 18 is circular-arcly that matches with section of jurisdiction 8, and section of jurisdiction 8 can adopt the arc transparent plate to make.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a visual test device of simulation section of jurisdiction different position slip casting hole slip casting, characterized by: the system comprises a double-liquid grouting system, a model box system, a bracket system and a data acquisition and processing system;
two-fluid grouting system: the double-liquid grouting machine comprises a cement mortar storage barrel and a water glass mortar storage barrel, wherein the cement mortar storage barrel and the water glass mortar storage barrel are connected with a double-liquid grouting machine through pipelines, and the double-liquid grouting machine is connected with a model box;
a mold box system: the double-liquid grouting machine comprises a rectangular organic glass model box, wherein the model box is provided with an upward opening, transparent soil is filled at the bottom of the model box, a grouting gap is reserved above the transparent soil, a grouting hole communicated with the grouting gap is formed in the side wall of the model box, the double-liquid grouting machine is connected with the grouting hole through a pipeline, a pipe piece is detachably and fixedly arranged above the grouting gap, the pipe piece is made of transparent organic glass, a secondary grouting reserved hole is formed in the pipe piece, a pressure-limiting drain hole is formed in the model box and connected with a hydraulic pump, and liquid sealing treatment is carried out on the matching position of the pipe piece and the inner wall of the model box;
a bracket system: the device comprises a rotating arm and a fixed support thereof, wherein the rotating arm is rotatably connected with a model box and is connected with the fixed support in a swinging way;
the data acquisition and processing system comprises: the system comprises a plurality of CMOS digital cameras, a plurality of lasers, a plurality of data lines and a computer for processing and storing data, wherein the plurality of CMOS digital cameras are connected with the computer.
2. The visual test device for simulating grouting of grouting holes in different positions of a duct piece according to claim 1, which is characterized in that: a buffer, a flow speed regulating valve and a slurry pressure gauge are arranged on a hose connected between the grouting hole and the double-liquid grouting machine; a connecting through hole is formed in the side wall of the mold box corresponding to the duct piece, the fixing bolt penetrates through the connecting through hole to be in threaded connection with the duct piece to achieve locking, the seam between the duct piece and the inner side wall of the mold box is sealed through a glass cement sealing strip, and the glass cement sealing strip is provided with a plurality of vacuum suckers.
3. The visual test device for simulating grouting of grouting holes in different positions of a duct piece according to claim 2, characterized in that: the transparent soil has similar specific gravity with a natural soil body of a required simulation environment, good stability, stable chemical property, no chemical reaction with interstitial fluid, no change of physicochemical property along with time change, high pressure resistance and good transparency.
4. The visual test device for simulating grouting of grouting holes in different positions of a duct piece according to claim 3, which is characterized in that: the transparent soil is prepared from amorphous silica gel and powder and/or transparent glass sand and/or fused quartz sand.
5. The visual test device for simulating grouting holes in different positions of a duct piece according to claim 1, 2, 3 or 4, which is characterized in that: and preparing the transparent soil with the same gradation and water content in the model box, and adding carbon nano tube particles into the transparent soil to serve as tracer particles.
6. The visual test device for simulating grouting holes in different positions of a duct piece according to claim 1, 2, 3 or 4, which is characterized in that: the fluid injected into the transparent soil has the same or similar refractive index with the transparent soil so as to enable the transparent soil to present transparent or approximately transparent properties.
7. The visual test device for simulating grouting of grouting holes in different positions of a duct piece according to claim 6, which is characterized in that: the pore water of the transparent soil is a calcium bromide solution or a mixed solution prepared by alkane solvents and mineral oil.
8. The visual test device for simulating grouting holes in different positions of a duct piece according to claim 1, 2, 3 or 4, which is characterized in that: the side wall of the model box is provided with a socket corresponding to the position of the grouting gap, a transparent plate is inserted into the grouting gap from the socket and blocks the transparent soil, and the outer end of the transparent plate is provided with a handle and is internally provided with a grouting pipeline.
9. The visual test device for simulating grouting of grouting holes in different positions of a duct piece according to claim 8, characterized in that: the section of jurisdiction is circular-arc, the transparent plate is circular-arc with the section of jurisdiction matching.
10. The test method of the visual test device for simulating grouting of the grouting holes in different positions of the duct piece, which is disclosed by claim 1, is characterized by comprising the following steps of: the method comprises the following steps:
the method comprises the following steps:
firstly, collecting geological survey data and segment size data of actual engineering, respectively customizing a model box and a transparent soil raw material according to the geological survey data and the segment size, preparing transparent soil according to an actual soil sample, and adding nanotube particles as tracer particles; then, performing direct shear test and triaxial test on the prepared soil sample and the soil sample in the actual engineering to determine the physical properties of the soil sample, and comparing and determining that the physical properties of the simulated transparent soil sample are similar to those of the actual soil sample;
step two:
preparing a double-slurry raw material: cement grout and water glass grout are respectively filled into a corresponding cement grout storage barrel and a corresponding water glass grout storage barrel; connecting the slurry storage barrel of the two kinds of slurry with a double-liquid grouting machine by using a hose and a three-way pipe, connecting a slurry outlet of the double-liquid grouting machine with the hose provided with a buffer, a flow speed regulating valve and a slurry pressure gauge, connecting the other end of the hose to a grouting port on the side wall of an organic glass mold box, ensuring the sealing property of a connector and preventing leakage;
step three:
connecting a pressure-limiting water outlet of the model box with a hydraulic pump, then loading the prepared transparent soil into the model box for compaction, slowly embedding the pipe piece into the model box through a vacuum sucker group, aligning the pipe piece with a hole site at a preset position, and fixing the position of the simulated pipe piece by using a bolt; then, performing ring sealing along the rectangular embedding gap by using glass cement to prevent the slurry from overflowing along the gap;
step four:
the base of the rotating arm is fixed on the ground, and the angle of the rotating arm is adjusted according to the test requirement to fix the spatial position of the model box;
step five:
the laser and the camera bracket are arranged according to the position of the model box, and the digital camera and the computer are connected by a data line. Installing a CMOS digital camera on the camera fixing support, adjusting the shooting visual field, and adjusting the aperture and the focal length to enable the tracer particles to be imaged clearly in the visual field;
step six:
in the test process, a picture of soil and tracer particle particles in a shooting visual field in the grouting process is recorded through a CMOS digital camera and is transmitted to a computer for processing through a data acquisition system; firstly, calculating a control point center of a calibration point for converting an image and a space coordinate, secondly, determining an analysis area, dividing the analysis area into a plurality of grids, then calculating a pixel coordinate of each grid in each frame of image by using a correlation coefficient, carrying out filtering analysis on output data by using the correlation coefficient, manually deleting the output data with errors, and finally converting the pixel coordinate into the space coordinate to obtain deformation information of a soil body and filling and diffusion conditions of slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110607119.5A CN114034845A (en) | 2021-06-01 | 2021-06-01 | Visual test device for simulating grouting of grouting holes in different positions of duct piece and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110607119.5A CN114034845A (en) | 2021-06-01 | 2021-06-01 | Visual test device for simulating grouting of grouting holes in different positions of duct piece and test method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114034845A true CN114034845A (en) | 2022-02-11 |
Family
ID=80134187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110607119.5A Pending CN114034845A (en) | 2021-06-01 | 2021-06-01 | Visual test device for simulating grouting of grouting holes in different positions of duct piece and test method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114034845A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324121A (en) * | 2022-03-16 | 2022-04-12 | 中国矿业大学(北京) | Visual teaching system for seepage heat exchange of fractured rock mass |
| CN116718523A (en) * | 2023-08-09 | 2023-09-08 | 长江三峡集团实业发展(北京)有限公司 | Push pipe Zhou Nijiang distribution test device and test method |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913289A (en) * | 2012-12-31 | 2014-07-09 | 同济大学 | Simulating system used for shield tunnel synchronous grouting test and test method thereof |
| CN203881511U (en) * | 2014-04-30 | 2014-10-15 | 山东大学 | Simulated crack grouting model test platform with variable inclination angle |
| CN205281948U (en) * | 2015-05-13 | 2016-06-01 | 中国铁建大桥工程局集团有限公司 | Analogue test device of filling behind wall of shield method construction inclined shaft section of jurisdiction |
| CN106885759A (en) * | 2017-03-28 | 2017-06-23 | 山东大学 | One kind visualization sand bed with saturated dynamic water osmotic grouting experimental rig and method |
| CN106917394A (en) * | 2017-03-08 | 2017-07-04 | 河海大学 | Transparent stratified soil simulation system and its compound method and miniature steel pipe pile grouting behind shaft or drift lining experimental rig therein and its application method |
| CN108872297A (en) * | 2018-08-27 | 2018-11-23 | 郑州大学 | A kind of condensation of grouting at the tail of the shield machine slurries and duct piece float upward process model experimental rig |
| CN109187272A (en) * | 2018-08-28 | 2019-01-11 | 天津大学 | A kind of interior sand grouting simulation test device and its test method |
| CN109799327A (en) * | 2019-03-08 | 2019-05-24 | 西南交通大学 | A kind of visual shield tunnel construction detection of grouting effects experimental rig and method |
| CN109798130A (en) * | 2019-01-15 | 2019-05-24 | 广州大学 | A kind of Multifunctional shield synchronous grouting model test apparatus |
| CN109826652A (en) * | 2019-02-01 | 2019-05-31 | 上海工程技术大学 | The simulation test device and method of slurries loss amount in shield synchronization slip casting |
| CN109975177A (en) * | 2019-04-30 | 2019-07-05 | 中南大学 | A kind of simulation test device and method of horizontal grouting mouth slip casting spreading morphology |
| CN111487166A (en) * | 2020-06-05 | 2020-08-04 | 中煤能源研究院有限责任公司 | Test device and method for simulating three-dimensional flow state of filling slurry in collapse zone |
| CN211877918U (en) * | 2020-01-17 | 2020-11-06 | 中铁四院集团西南勘察设计有限公司 | Test device for simulating shield tunnel grouting |
| CN112269010A (en) * | 2020-10-26 | 2021-01-26 | 中煤科工集团西安研究院有限公司 | Variable inclination angle experimental device and method for simulating multi-horizontal-hole grouting of water guide fault |
| CN112630007A (en) * | 2020-12-29 | 2021-04-09 | 中铁十二局集团第七工程有限公司 | Layered surrounding rock grouting reinforcement indoor model test device |
| CN216142758U (en) * | 2021-06-01 | 2022-03-29 | 中铁十八局集团第五工程有限公司 | Visual test device for simulating grouting of grouting holes in different positions of duct piece |
-
2021
- 2021-06-01 CN CN202110607119.5A patent/CN114034845A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913289A (en) * | 2012-12-31 | 2014-07-09 | 同济大学 | Simulating system used for shield tunnel synchronous grouting test and test method thereof |
| CN203881511U (en) * | 2014-04-30 | 2014-10-15 | 山东大学 | Simulated crack grouting model test platform with variable inclination angle |
| CN205281948U (en) * | 2015-05-13 | 2016-06-01 | 中国铁建大桥工程局集团有限公司 | Analogue test device of filling behind wall of shield method construction inclined shaft section of jurisdiction |
| CN106917394A (en) * | 2017-03-08 | 2017-07-04 | 河海大学 | Transparent stratified soil simulation system and its compound method and miniature steel pipe pile grouting behind shaft or drift lining experimental rig therein and its application method |
| CN106885759A (en) * | 2017-03-28 | 2017-06-23 | 山东大学 | One kind visualization sand bed with saturated dynamic water osmotic grouting experimental rig and method |
| CN108872297A (en) * | 2018-08-27 | 2018-11-23 | 郑州大学 | A kind of condensation of grouting at the tail of the shield machine slurries and duct piece float upward process model experimental rig |
| CN109187272A (en) * | 2018-08-28 | 2019-01-11 | 天津大学 | A kind of interior sand grouting simulation test device and its test method |
| CN109798130A (en) * | 2019-01-15 | 2019-05-24 | 广州大学 | A kind of Multifunctional shield synchronous grouting model test apparatus |
| CN109826652A (en) * | 2019-02-01 | 2019-05-31 | 上海工程技术大学 | The simulation test device and method of slurries loss amount in shield synchronization slip casting |
| CN109799327A (en) * | 2019-03-08 | 2019-05-24 | 西南交通大学 | A kind of visual shield tunnel construction detection of grouting effects experimental rig and method |
| CN109975177A (en) * | 2019-04-30 | 2019-07-05 | 中南大学 | A kind of simulation test device and method of horizontal grouting mouth slip casting spreading morphology |
| CN211877918U (en) * | 2020-01-17 | 2020-11-06 | 中铁四院集团西南勘察设计有限公司 | Test device for simulating shield tunnel grouting |
| CN111487166A (en) * | 2020-06-05 | 2020-08-04 | 中煤能源研究院有限责任公司 | Test device and method for simulating three-dimensional flow state of filling slurry in collapse zone |
| CN112269010A (en) * | 2020-10-26 | 2021-01-26 | 中煤科工集团西安研究院有限公司 | Variable inclination angle experimental device and method for simulating multi-horizontal-hole grouting of water guide fault |
| CN112630007A (en) * | 2020-12-29 | 2021-04-09 | 中铁十二局集团第七工程有限公司 | Layered surrounding rock grouting reinforcement indoor model test device |
| CN216142758U (en) * | 2021-06-01 | 2022-03-29 | 中铁十八局集团第五工程有限公司 | Visual test device for simulating grouting of grouting holes in different positions of duct piece |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324121A (en) * | 2022-03-16 | 2022-04-12 | 中国矿业大学(北京) | Visual teaching system for seepage heat exchange of fractured rock mass |
| CN116718523A (en) * | 2023-08-09 | 2023-09-08 | 长江三峡集团实业发展(北京)有限公司 | Push pipe Zhou Nijiang distribution test device and test method |
| CN116718523B (en) * | 2023-08-09 | 2024-01-05 | 长江三峡集团实业发展(北京)有限公司 | Distribution test method for push pipe Zhou Nijiang |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110954676B (en) | Visual test device for simulating shield tunneling existing tunnel construction | |
| Chen et al. | Centrifugal model tests on face failure of earth pressure balance shield induced by steady state seepage in saturated sandy silt ground | |
| CN105954168B (en) | High-space-time resolution unsaturated soil three-dimensional seepage field observation test device | |
| JP3220586U (en) | Equipment for measuring the hydraulic conductivity of various types of earth and sand | |
| CN216142758U (en) | Visual test device for simulating grouting of grouting holes in different positions of duct piece | |
| CN106885759B (en) | A kind of visualization sand bed with saturated dynamic water osmotic grouting experimental rig and method | |
| CN109667589B (en) | Ultra-deep stratum shield synchronous grouting full-section visual simulation test device and method | |
| CN105242028B (en) | One kind is taken out filling by skyscraper load and subsoil water and causes soil body delaminating deposition model test apparatus and test method | |
| CN114034845A (en) | Visual test device for simulating grouting of grouting holes in different positions of duct piece and test method thereof | |
| CN105716970A (en) | Visual test device for damaged form of pile-soil contact surface of specially-shaped pile and use method | |
| CN113252549A (en) | Test device and method for simulating safe distance of shield tunneling in karst area | |
| CN106567416A (en) | Model test device of excavating tunnel in transparent soil foundation and test method | |
| CN109712500A (en) | A kind of visual experimental rig of soil body failure by piping 3D hologram and application method | |
| Zhou | Tunnelling-induced ground displacements in sand | |
| CN111122337A (en) | Segment soil pressure model test device and method considering shield tail wall post-grouting influence | |
| Sui et al. | Modeling of grout propagation in transparent replica of rock fractures | |
| CN110793964A (en) | Rainfall-induced soil landslide field simulation test system | |
| CN109798130A (en) | A kind of Multifunctional shield synchronous grouting model test apparatus | |
| Ganiyu et al. | Utilisation of transparent synthetic soil surrogates in geotechnical physical models: A review | |
| Kong et al. | Failure mechanism and movement process of three loess landslides due to freeze-thaw cycle in the Fangtai village, Yongjing County, Chinese Loess Plateau | |
| Jia et al. | Visualization investigation on stability of shield tunnel face with transparent soil, considering different longitudinal inclination angles | |
| Liu et al. | Failure mechanism of face for slurry shield-driven tunnel in sand | |
| CN209742911U (en) | simulation test device for slurry loss amount in shield synchronous grouting | |
| CN114279934B (en) | Island reef water-rich calcareous sandy soil stratum grouting simulation and permeability test device and method | |
| Liu et al. | Staged embankment construction in geotechnical centrifuges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |