CN115808437A - Subway communication channel freezing method construction model test device and method - Google Patents
Subway communication channel freezing method construction model test device and method Download PDFInfo
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- CN115808437A CN115808437A CN202310061105.7A CN202310061105A CN115808437A CN 115808437 A CN115808437 A CN 115808437A CN 202310061105 A CN202310061105 A CN 202310061105A CN 115808437 A CN115808437 A CN 115808437A
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Abstract
The invention belongs to the technical field of urban rail transit construction, and provides a subway communication channel freezing method construction model test device and a method, wherein the subway communication channel freezing method construction model test device comprises a base; the device comprises two groups of organic glass plates, wherein a soil sample is positioned in the middle of the two groups of organic glass plates; the pressurizing unit comprises a first pressurizing part and two groups of second pressurizing parts, wherein the first pressurizing part and the two groups of second pressurizing parts are arranged between the two groups of organic glass plates; the permeation units are arranged corresponding to the opposite sides of the two groups of organic glass plates, and the first pressurizing part and the second pressurizing part are respectively arranged corresponding to the permeation units; the freezing unit penetrates through the organic glass plate and also extends into the soil sample; the tunneling unit penetrates through the two groups of organic glass plates; and the monitoring unit penetrates through the organic glass plate and also extends into the soil sample. The invention can more completely simulate various complex environments encountered in the whole freezing method communication channel construction whole process, and better provide better technical support for actual construction.
Description
Technical Field
The invention belongs to the technical field of urban rail transit construction, and particularly relates to a subway communication channel freezing method construction model test device and method.
Background
The artificial freezing technology is widely applied to the construction of subway communication channels in water-rich strata. When the freezing method is used for construction, along with the reduction of temperature, water in soil freezes to form frozen soil with higher strength and better stability, and the water stopping effect can be achieved, and the frozen soil can be used as a temporary supporting structure of a soil excavation space. The method aims to solve the problem that the contact channel excavation under the maintenance of the water-rich soft clay stratum freezing curtain needs to deeply research the strength and deformation characteristics of the frozen soft clay, and provides key parameters for contact channel freezing method construction.
The prior invention can only simulate the partial construction process of the freezing method connecting channel and can not completely simulate the actual engineering condition, especially the lateral pressure of the soil sample, the change of the soil sample under the underground water environment and after the excavation can not be reflected. In order to simulate the whole construction process in an experiment, simulate the general situation of actual engineering to the greatest extent and better reflect the actual situation of a field, the subway contact channel freezing method construction model test device and the method are particularly provided.
Disclosure of Invention
The invention aims to provide a subway communication channel freezing method construction model test device and a subway communication channel freezing method construction model test method, which are used for solving the problems and achieving the purposes of more truly simulating the whole freezing method construction process of a communication channel and better providing guidance for numerical simulation and actual engineering.
In order to achieve the purpose, the invention provides the following scheme: a subway communication channel freezing method construction model test device comprises,
a base;
the two groups of organic glass plates are vertically and fixedly connected to the base and arranged in parallel, and a soil sample is positioned in the middle of the two groups of organic glass plates;
the pressurizing unit comprises a first pressurizing part and two groups of second pressurizing parts, the first pressurizing part and the two groups of second pressurizing parts are arranged between the two groups of organic glass plates, the first pressurizing part is arranged at the tops of the two groups of organic glass plates, and the two groups of second pressurizing parts are respectively positioned on two sides below the first pressurizing part;
the infiltration units are arranged corresponding to the opposite sides of the two groups of organic glass plates, and the first pressurizing part and the second pressurizing part are respectively arranged corresponding to the infiltration units and used for infiltrating water into the soil sample;
the freezing unit penetrates through the organic glass plate and also extends into the soil sample;
the tunneling unit penetrates through the two groups of organic glass plates;
and the monitoring unit penetrates through the organic glass plate and also extends into the soil sample.
Preferably, the fixed component comprises an external hydraulic support, the external hydraulic support is vertically connected to the base in a sliding mode, the two sets of organic glass plates are located on the inner side of the external hydraulic support, the first pressurizing portion is arranged on the top wall of the inner side of the external hydraulic support, and the two sets of second pressurizing portions are arranged on two opposite side walls of the external hydraulic support respectively.
Preferably, first pressurization portion includes that vertical fixed connection is in a plurality of first hydraulic ram, a plurality of the end fixedly connected with organic glass apron that stretches out of first hydraulic ram, organic glass apron and two sets of the relative lateral wall sliding connection of organic glass board, organic glass apron with the soil sample corresponds the setting.
Preferably, the second pressurizing part comprises a plurality of second hydraulic push rods horizontally and fixedly connected to the inner side wall of the external hydraulic support, and the extending ends of the plurality of second hydraulic push rods are arranged corresponding to the infiltration units.
Preferably, the infiltration unit includes two sets of side infiltration casees, bottom infiltration case and water supply portion, bottom infiltration case fixed connection is in on the base, just two long limit lateral walls of bottom infiltration case respectively with two sets ofly the relative lateral wall looks butt of organic glass board, two sets of side infiltration case sliding connection is two sets of between the relative lateral wall of organic glass board, two sets of the bottom of side infiltration case with the top looks butt of bottom infiltration case, two sets of the relative lateral wall of side infiltration case with the top of bottom infiltration case respectively with the soil sample corresponds the setting, and is two sets of the relative lateral wall of side infiltration case with a plurality of discharge orifices have been seted up on the roof of bottom infiltration case respectively, and water supply portion is through a plurality of the discharge orifices seeps water in to the soil sample, and is two sets of side infiltration case is kept away from a plurality of the lateral wall of soil sample respectively with a plurality of second hydraulic ram fixed connection.
Preferably, the water supply part comprises a water supply tank, the water supply tank is respectively communicated with the two groups of the side permeation tanks and the bottom permeation tank through pipelines, and the pipelines are sequentially communicated with valves, pressure pumps, flow meters and pressure gauges along the water flow direction.
Preferably, freeze the unit and include first square linker, the square linker of second and high low temperature refrigeration case, first square linker with the square linker of second passes through support fixed connection and is one on the organic glass board, the square linker of second is located first square linker is inboard, fixedly connected with a plurality of freezing pipes on the first square linker, it is a plurality of the freezing pipe runs through prefabricated hole (45) the organic glass board and stretches into in the soil sample, first square linker with through a plurality of between the square linker of second freeze the pipe intercommunication, first square linker with the square linker of second respectively through the hose with high low temperature refrigeration case intercommunication.
Preferably, the tunneling unit comprises a drilling machine slide rail fixedly connected to the base, a drilling machine support is connected to the drilling machine slide rail in a sliding mode, a drilling machine controller and a drilling machine core are fixedly connected to the drilling machine support, the drilling machine core is electrically connected with the drilling machine controller, a drill bit is fixedly connected to the drilling machine core and is two sets of circular holes are formed in the organic glass plate respectively and are arranged coaxially, two sets of circular holes are formed in the organic glass plate, a glass cover is connected to each circular hole in a threaded mode, and the drill bit penetrates through the circular holes.
Preferably, the monitoring unit includes pressure stress box, temperature sensor and moisture sensor, pressure stress box, temperature sensor with moisture sensor runs through respectively organic glass board and with the inside corresponding setting of soil sample, pressure stress box, temperature sensor with moisture sensor electric connection has the computer respectively.
The subway communication channel freezing method construction model tester is preferable, and the operation steps comprise,
s1, preparing a soil sample, preparing the soil sample according to a test scheme and a similar principle, and sealing and standing the soil sample to uniformly mix the soil sample;
s2, assembling equipment, mounting the equipment, placing the soil sample in the device in a layered mode, and standing the soil sample;
s3, testing, namely after the soil sample is maintained, punching a plurality of holes in advance on the surface of the soil sample to simulate pressure relief holes in actual engineering, and starting a freezing unit to freeze; simultaneously starting a pressurizing unit to apply preset pressure to the soil sample to simulate the formation pressure; starting a penetration unit to seep water into the soil sample, and recording data through a monitoring unit;
s4, performing a tunneling test, changing the temperature required by the set negative freezing temperature when the temperature of the soil sample reaches a preset temperature, starting a tunneling unit to enable the drill bit to penetrate through the soil body, moving the drill bit out, and if the frozen soil strength is monitored, changing the pressure of a pressurizing unit and observing the deformation of the soil sample; if the stability of the communication channel is detected, the communication channel can be supported;
and S5, performing a thawing and sinking test, namely starting the test by adjusting the freezing unit, and detecting a temperature field and a displacement field by the monitoring unit.
The invention has the following technical effects: the invention can apply vertical pressure and lateral pressure to the soil body during the experiment, can effectively simulate the stress environment of the target soil body under the actual engineering, and the infiltration unit can well simulate the influence of underground water on the soil body and can completely simulate the environment of the soil body; the tunneling support of the tunneling unit for the soil sample can completely simulate the construction of the communication channel after the freezing is finished and the subsequent melting and sinking experiment. And the change of the soil sample in the test process can be monitored by the detection unit, so that the effect achieved by the invention can more completely simulate various complex environments encountered in the whole freezing method contact channel construction whole process, and provide better technical support for actual construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a perspective view of a test device according to the present invention;
FIG. 2 is a perspective view of a permeation unit according to the present invention;
FIG. 3 is a perspective view of the freezing unit of the present invention;
figure 4 is a perspective view of a ripping unit of the present invention;
FIG. 5 is a perspective view of the monitoring unit of the present invention;
FIG. 6 is a schematic view of a temperature and moisture monitoring arrangement according to the present invention;
FIG. 7 is a schematic view of a freezing tube of the present invention;
FIG. 8 is a schematic view of the connection of the freezing tube to the glass plate;
FIG. 9 is a schematic view of the distribution of pre-formed freeze holes in a glass sheet;
wherein, 1, hydraulic ejector rod; 2. an organic glass plate; 4. a side infiltration tank; 5. a water supply tank; 6. a bottom infiltration tank; 7. a support bracket; 9. a pressure pump; 10. an external hydraulic mount; 11. a high and low temperature refrigeration box; 12. a computer; 14. a freezing pipe; 15. a water flowing hole; 16. water seepage and outlet holes; 17. a valve; 18. a pipeline; 19. a flow meter; 20. a pressure gauge; 21. a drill bit; 22. a drill core; 23. a drill rig support; 24. a drill slide rail; 25. a base; 26. a circular hole; 27. a glass cover; 28. a first support steel plate; 29. an organic glass cover plate; 30. a bracket slide rail; 31. a first square communicating vessel; 32. a second square communicating vessel; 34. monitoring the prefabricated hole by temperature; 35. a pressure stress cell; 36. monitoring the prefabricated holes by moisture; 37. DIC means; 38. a second hydraulic ejector rod; 39. a drill controller; 40. a temperature sensor; 41. a moisture sensor; 42. a second support steel plate; 43. an outer tube; 44. an inner tube; 45. prefabricating a freezing hole on a glass plate; 46. a support; 47. a hose is connected.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
Referring to fig. 1 to 9, the present invention provides a subway communication channel freezing method construction model test apparatus, including,
a base 25;
the device comprises two groups of organic glass plates 2, wherein the two groups of organic glass plates 2 are vertically and fixedly connected to a base 25, the two groups of organic glass plates 2 are arranged in parallel, and a soil sample is positioned in the middle of the two groups of organic glass plates 2;
the pressurizing unit comprises a first pressurizing part and two groups of second pressurizing parts, the first pressurizing part and the two groups of second pressurizing parts are arranged between the two groups of organic glass plates 2, the first pressurizing part is arranged at the tops of the two groups of organic glass plates 2, and the two groups of second pressurizing parts are respectively positioned on two sides below the first pressurizing part;
the infiltration units are arranged corresponding to the opposite sides of the two groups of organic glass plates 2, and the first pressurizing part and the second pressurizing part are respectively arranged corresponding to the infiltration units and used for infiltrating water to the soil sample;
the freezing unit penetrates through the organic glass plate 2 and also extends into the soil sample;
the tunneling unit penetrates through the two groups of organic glass plates 2;
the monitoring unit passes through the organic glass plate 2 and also extends into the soil sample.
The two groups of organic glass plates 2, the pressurizing unit and the penetrating unit can surround to form a soil sample containing space; the supporting brackets 7 are respectively and fixedly connected between the outer sides of the two groups of organic glass plates 2 and the base 25 and are used for reinforcing the two groups of organic glass plates 2 and preventing the organic glass plates 2 from inclining in the pressurizing process; the pressurizing unit is mainly used for applying vertical pressure and lateral pressure to the soil body, so that the stress environment on the target soil body under actual engineering can be effectively simulated; the infiltration unit has the main functions of well simulating the influence of underground water on the soil body and completely simulating the environment where the soil body is located; the main function of the tunneling unit is to tunnel a soil sample, so that the influence of the construction of the communication channel on the soil body after freezing is completely simulated, and the subsequent melting and sinking experiment can be favorably carried out. The monitoring unit is mainly used for monitoring the change of the soil sample in the test process. On the whole, the invention can more completely simulate various complex environments encountered in the whole freezing method communication channel construction whole process, and better provide technical support for actual construction.
Further optimize the scheme, fixed subassembly includes outside hydraulic support 10, and the vertical sliding connection of outside hydraulic support 10 is on base 25, and two sets of organic glass boards 2 are located the inboard of outside hydraulic support 10, and first pressurization portion sets up on the inboard roof of outside hydraulic support 10, and two sets of second pressurization portions set up respectively on the double-phase relative lateral wall of outside hydraulic support 10.
When placing a soil sample, sliding the outer hydraulic support 10 exposes the two sets of plexiglass plates 2. The soil sample is convenient to place.
Further optimize the scheme, first pressurization portion includes a plurality of first hydraulic ram rods 1 of vertical fixed connection at the inboard top of outside hydraulic support 10, and the end fixedly connected with organic glass apron 29 that stretches out of a plurality of first hydraulic ram rods 1, organic glass apron 29 and the relative lateral wall sliding connection of two sets of organic glass boards 2, organic glass apron 29 corresponds the setting with the soil sample.
The first hydraulic ejector rod 1 pushes the organic glass cover plate 29 downwards, and the organic glass cover plate 29 acts on the soil sample to apply vertical pressure.
In a further optimized scheme, the second pressurizing part comprises a plurality of second hydraulic ejector rods 38 horizontally and fixedly connected to the inner side wall of the external hydraulic support 10, and the extending ends of the second hydraulic ejector rods 38 are arranged corresponding to the osmosis units.
Further optimization scheme, the infiltration unit includes two sets of side infiltration casees 4, bottom infiltration case 6 and water supply portion, bottom infiltration case 6 fixed connection is on base 25, and two long limit lateral walls of bottom infiltration case 6 respectively with the relative lateral wall looks butt of two sets of organic glass boards 2, two sets of side infiltration case 4 sliding connection are between the relative lateral wall of two sets of organic glass boards 2, the bottom of two sets of side infiltration case 4 and the top looks butt of bottom infiltration case 6, the relative lateral wall of two sets of side infiltration case 4 and the top of bottom infiltration case 6 correspond the setting with the soil sample respectively, seted up a plurality of discharge orifices 15 on the relative lateral wall of two sets of side infiltration cases 4 and the roof of bottom infiltration case 6 respectively, water supply portion permeates water in to the soil sample through a plurality of discharge orifices 15, the lateral wall that a plurality of soil samples were kept away from to two sets of side infiltration cases 4 respectively with a plurality of second hydraulic ram 38 fixed connection.
The side infiltration case 4 is connected into a whole through slide rail organic glass board 2, passes through the rubber tape at the clearance department of side infiltration case 4 and two sets of organic glass boards 2 and seals. The two groups of side permeation boxes 4 move towards the middle of the two groups of organic glass plates 2 under the pushing of the second hydraulic push rods 38 to apply lateral pressure on the soil sample. Meanwhile, the water supply part permeates water into the soil sample through the water flowing holes 15 on the two groups of side permeation boxes 4 and the bottom permeation box 6, so that the influence of underground water on the soil body can be simulated.
Further optimization scheme, the water inlet of side infiltration case 4 is located the top of side infiltration case 4, and the water inlet passes through pipeline 18 and 5 intercommunications of feed tank, a plurality of first supporting steel plates 28 of inboard fixedly connected with of side infiltration case 4, and a plurality of first supporting steel plates 28 divide the inside of side infiltration case 4 into a plurality of first inner chambers, has seted up seepage flow apopore 16 on a plurality of first supporting steel plates 28 respectively, and a plurality of seepage flow apopores 16 communicate a plurality of first inner chambers.
The first supporting steel plate 28 can strengthen the strength of the side infiltration tank 4, and ensure that the side infiltration tank 4 is not damaged in the process of pressurizing the soil sample by the side infiltration tank 4. The water seepage outlet hole 16 can make water flow down from the upper part, so that a plurality of water flowing holes 15 on the side surface seepage box 4 can uniformly discharge water, and the water seepage effect is ensured.
Further optimize the scheme, the inboard fixedly connected with a plurality of second supporting steel plates 42 of bottom infiltration case 6, a plurality of second supporting steel plates 42 divide into a plurality of second inner chambers with the inside of bottom infiltration case 6, and a plurality of second inner chambers communicate with feed water tank 5 through pipeline 18 respectively.
The second supporting steel plate 42 may enhance the strength of the bottom infiltration tank 6, so as to ensure that the bottom infiltration tank 6 is not damaged by pressure during the pressurization process.
According to a further optimized scheme, the water supply part comprises a water supply tank 5, the water supply tank 5 is respectively communicated with the insides of the two groups of side permeation tanks 4 and the bottom permeation tank 6 through a pipeline 18, and the pipeline 18 is sequentially communicated with a valve 17, a pressure pump 9, a flow meter 19 and a pressure gauge 20 along the water flow direction.
The pressurizing pump 9 is started to supply water to the side permeation tank 4 and the bottom permeation tank 6, and the water seepage process is carried out. The flow rate of the water is controlled by a pressure gauge 20 and a valve 17, and the flow meter is used to detect the amount of water that has permeated into the soil sample.
Further optimizing scheme, the freezing unit includes first square linker 31, the square linker 32 of second and high low temperature refrigeration case 11, first square linker 31 and the square linker 32 of second pass through support 46 fixed connection on an organic glass board 2, the square linker 32 of second is located first square linker 31 inboard, fixedly connected with a plurality of freezing pipes 14 on the first square linker 31, a plurality of freezing pipes 14 run through organic glass board 2 and stretch into the soil sample through the prefabricated freezing hole 45 of glass board, communicate through a plurality of freezing pipes 14 between the square linker 31 of first square linker 31 and the second 32, first square linker 31 and the square linker 32 of second communicate with high low temperature refrigeration case 11 through the hose respectively. .
The first square communicating vessel 31 and the second square communicating vessel 32 are fixed on the organic glass plate 2 through bolts, and the organic glass plate 2 is provided with prefabricated holes of the freezing pipes 14, so that the freezing pipes 14 extend into the soil sample. The freezing pipe 14 is composed of an inner pipe 44 and an outer pipe 43, the refrigerant flows out of the high-low temperature refrigeration box 11, flows through the first square communicating device 31, then uniformly flows into the outer pipe 43 of the freezing pipe 14, flows into the inner pipe 44 of the freezing pipe 14 from the outer pipe 43, enters the second square communicating device 32 from the inner pipe 44 through the connecting hose 47, and flows back into the high-low temperature refrigeration box 11 from the second square communicating device 32, the refrigeration cycle is completed, and the closed-loop refrigeration flow of the refrigeration media of the high-low temperature refrigeration box 11, the first square communicating device 31, the freezing pipe 14, the second square communicating device 32 and the high-low temperature refrigeration box 11 is formed.
Further optimize the scheme, the unit of tunnelling includes drilling machine slide rail 24 of fixed connection on base 25, drilling machine slide rail 24 is mutually perpendicular with the plane of organic glass board 2, sliding connection has drilling machine support 23 on drilling machine slide rail 24, fixedly connected with drilling machine controller 39 and drilling machine core 22 on drilling machine support 23, drilling machine core 22 and drilling machine controller 39 electric connection, fixedly connected with drill bit 21 on drilling machine core 22, circular port 26 has been seted up on two sets of organic glass boards 2 respectively, two sets of circular port 26 coaxial line sets up, threaded connection has glass lid 27 in two sets of circular port 26 respectively, drill bit 21 runs through two sets of circular port 26.
The glass cover 27 is fixed with a handle, so that the glass cover is convenient to disassemble. When the soil sample needs to be tunneled, the two groups of glass covers 27 are unscrewed, the drill core 22 is started through the drill controller 39, the drill core 22 drives the drill bit 21 to rotate, the drill support 23 is slid, the drill bit 21 tunnels the soil sample, and the soil sample is drilled.
Further optimize the scheme, the monitoring unit includes pressure stress box 35, temperature sensor 40 and moisture sensor 41, and pressure stress box 35, temperature sensor 40 and moisture sensor 41 run through organic glass board 2 respectively and correspond the setting with the soil sample is inside, and pressure stress box 35, temperature sensor 40 and moisture sensor 41 electric connection have computer 12 respectively.
Further optimize the scheme, having seted up a plurality of temperature monitoring prefabricated hole 34 and a plurality of moisture monitoring prefabricated hole 36 on keeping away from the organic glass board 2 of drill bit 21, a plurality of temperature sensor 40 penetrate in a plurality of temperature monitoring prefabricated hole 34 and with the inside setting that corresponds of soil sample, a plurality of moisture sensor 41 penetrate respectively in a plurality of moisture monitoring prefabricated hole 36 and with the inside setting that corresponds of soil sample.
In a further optimized scheme, a DIC device 37 is arranged on the outer side of the organic glass plate 2, and the DIC device 37 is electrically connected with the computer 12.
The subway communication channel freezing method construction model test method comprises the operation steps of,
s1, preparing a soil sample, preparing the soil sample according to a test scheme and a similar principle, and sealing and standing the soil sample to uniformly mix the soil sample;
s2, assembling equipment, mounting the equipment, placing the soil sample in the device in a layering manner, and standing the soil sample;
the external hydraulic support 10 is moved away from the upper part of the organic glass plate 2 in advance, the freezing pipe 14 is fixedly arranged on the organic glass plate 2 in advance, vaseline is smeared on the periphery and the bottom of the organic glass plate 2, and the two side surface permeation boxes 4 are slid to the two most sides; laying a soil sample in a layered manner, burying a pressure stress box 35 in a pre-designed position in the laying process, and burying the soil sample around the freezing pipe 14; after the soil sample is arranged, covering the preservative film above the soil sample, and covering an organic glass cover plate 29; a temperature sensor 40 is arranged in the temperature monitoring prefabricated hole 34 and used for detecting the change of a temperature field in the freezing and thawing process; moving the external hydraulic support 10 back to the original position in preparation for subsequent pressurization; after the work is finished, the soil sample is kept stand.
S3, testing, namely after the soil sample is maintained, punching a plurality of holes in advance on the surface of the soil sample to simulate pressure relief holes in actual engineering, and starting a freezing unit to freeze; simultaneously starting a pressurizing unit to apply preset pressure to the soil sample to simulate the formation pressure; starting a penetration unit to seep water into the soil sample, and recording data through a monitoring unit;
and starting freezing, opening the high-low temperature refrigeration box 11 to adjust the temperature of the refrigerant to a specified temperature, starting the first hydraulic ejector rod 1 and the second hydraulic ejector rod 38 to apply a preset pressure to the soil sample to simulate the formation pressure, and starting the booster pump 9 to start supplying water to the side permeation box 4 and the bottom permeation box 6. Providing specific water pressure through the booster pump 9 and the valve 17 and reading the water pressure from the pressure gauge 20, monitoring data through the temperature sensor 40, the pressure stress box 35 and the moisture sensor 41, arranging a control measuring point, monitoring real-time strain displacement change of soil by using the DIC device 37, and recording the change by using the computer 12
S4, performing a tunneling test, changing the temperature required by the set negative freezing temperature when the temperature of the soil sample reaches a preset temperature, starting a tunneling unit to enable the drill bit to penetrate through the soil body, moving the drill bit out, and if the frozen soil strength is monitored, changing the pressure of a pressurizing unit and observing the deformation of the soil sample; if the stability of the communication channel is detected, the communication channel can be supported;
the two sets of glass covers 27 are unscrewed and the drill bit 21 is activated to make the drill bit 21 penetrate the soil sample. If the frozen soil strength is monitored, the pressure of the first hydraulic ejector rod 1 and the second hydraulic ejector rod 38 is changed through the computer 12, and the deformation of the soil sample is observed.
And S5, performing a thawing and sinking test, namely starting the test by adjusting the freezing unit, and detecting a temperature field and a displacement field by the monitoring unit.
The melting and sinking experiment is carried out by adjusting the temperature of the refrigerant in the high-low temperature refrigeration box 11. The data from the temperature sensor 40 and the DIC unit 37 are detected and recorded.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. Subway contact channel freezes method construction model test device, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a base (25);
the device comprises two groups of organic glass plates (2), wherein the two groups of organic glass plates (2) are vertically and fixedly connected to a base (25), the two groups of organic glass plates (2) are arranged in parallel, and a soil sample is positioned in the middle of the two groups of organic glass plates (2);
the pressurizing unit comprises a fixing component fixedly connected to the base, a first pressurizing part and two groups of second pressurizing parts are arranged on the fixing component, the first pressurizing part is positioned at the tops of the two groups of organic glass plates (2), the two groups of second pressurizing parts are respectively positioned on two sides of the organic glass plates (2), and the first pressurizing part and the second pressurizing parts are in sliding contact with the two organic glass plates (2);
the infiltration units are arranged corresponding to the opposite sides of the two groups of organic glass plates (2), and the first pressurizing part and the second pressurizing part are respectively arranged corresponding to the infiltration units and used for infiltrating water into the soil sample;
the freezing unit penetrates through the organic glass plate (2) and also extends into the soil sample;
the tunneling unit penetrates through the two groups of organic glass plates (2);
the monitoring unit penetrates through the organic glass plate (2) and further extends into the soil sample.
2. The subway communication channel freezing method construction model test device as claimed in claim 1, wherein: the fixing assembly comprises an external hydraulic support (10), the external hydraulic support (10) is vertically connected to the base (25) in a sliding mode, the two sets of organic glass plates (2) are located on the inner side of the external hydraulic support (10), the first pressurizing portion is arranged on the top wall of the inner side of the external hydraulic support (10), and the two sets of second pressurizing portions are arranged on two opposite side walls of the external hydraulic support (10) respectively.
3. The subway communication channel freezing method construction model test device according to claim 2, characterized in that: first pressurization portion includes vertical fixed connection and is in a plurality of first hydraulic ram (1) at outside hydraulic support (10) inboard top, it is a plurality of the end fixedly connected with organic glass apron (29) that stretches out of first hydraulic ram (1), organic glass apron (29) and two sets of the relative lateral wall sliding connection of organic glass board (2), organic glass apron (29) with the soil sample corresponds the setting.
4. The subway communication channel freezing method construction model test device according to claim 3, characterized in that: the second pressurizing part comprises a plurality of second hydraulic ejector rods (38) which are horizontally and fixedly connected to the inner side wall of the external hydraulic support (10), and the extending ends of the second hydraulic ejector rods (38) are arranged corresponding to the osmosis units.
5. The subway communication channel freezing method construction model test device according to claim 4, characterized in that: infiltration unit includes two sets of side infiltration case (4), bottom infiltration case (6) and water supply portion, bottom infiltration case (6) fixed connection is in on base (25), just two long limit lateral walls of bottom infiltration case (6) respectively with two sets of the relative lateral wall looks butt of organic glass board (2), two sets of side infiltration case (4) sliding connection is two sets of between the relative lateral wall of organic glass board (2), two sets of the bottom of side infiltration case (4) with the top looks butt of bottom infiltration case (6), two sets of the relative lateral wall of side infiltration case (4) with the top of bottom infiltration case (6) respectively with the soil sample corresponds the setting, and is two sets of the relative lateral wall of side infiltration case (4) with a plurality of tye (15) have been seted up on the roof of bottom infiltration case (6) respectively, and water supply portion is through a plurality of tye (15) infiltration in to the soil sample, and two sets of side infiltration case (4) are kept away from a plurality of the lateral wall of soil sample respectively with a plurality of second hydraulic ram (38) fixed connection.
6. The subway communication channel freezing method construction model test device according to claim 5, characterized in that: the water supply part comprises a water supply tank (5), the water supply tank (5) is respectively communicated with the two groups of side permeation tanks (4) and the inside of the bottom permeation tank (6) through a pipeline (18), and the pipeline (18) is sequentially communicated with a valve (17), a pressure pump (9), a flow meter (19) and a pressure gauge (20) along the water flow direction.
7. The subway communication channel freezing method construction model test device as claimed in claim 1, wherein: the freezing unit comprises a first square communicating vessel (31), a second square communicating vessel (32) and a high-low temperature refrigerating box (11), the first square communicating vessel (31) and the second square communicating vessel (32) are fixedly connected on one through a support (46) on an organic glass plate (2), the second square communicating vessel (32) is located on the inner side of the first square communicating vessel (31), a plurality of freezing pipes (14) are fixedly connected on the first square communicating vessel (31) and penetrate through prefabricated holes (45) in the organic glass plate (2) and extend into a soil sample, the first square communicating vessel (31) is communicated with the second square communicating vessel (32) through a plurality of freezing pipes (14), and the first square communicating vessel (31) is communicated with the second square communicating vessel (32) through hoses and the high-low temperature refrigerating box (11).
8. The subway communication channel freezing method construction model test device as claimed in claim 1, wherein: the tunneling unit comprises a drilling machine sliding rail (24) fixedly connected to the base (25), a drilling machine support (23) is connected to the drilling machine sliding rail (24) in a sliding mode, a drilling machine controller (39) and a drilling machine core (22) are fixedly connected to the drilling machine support (23), the drilling machine core (22) is electrically connected with the drilling machine controller (39), a drilling bit (21) is fixedly connected to the drilling machine core (22) in two groups, circular holes (26) are formed in the organic glass plate (2) respectively, the circular holes (26) are arranged coaxially, the circular holes (26) are formed in two groups, and a glass cover (27) is connected to the circular holes (26) in a threaded mode respectively, and the drilling bit (21) penetrates through the circular holes (26).
9. The subway communication channel freezing method construction model test device as claimed in claim 1, wherein: the monitoring unit includes pressure stress box (35), temperature sensor (40) and moisture sensor (41), pressure stress box (35), temperature sensor (40) and moisture sensor (41) run through respectively organic glass board (2) and with the inside setting that corresponds of soil sample, pressure stress box (35), temperature sensor (40) and moisture sensor (41) electric connection respectively has computer (12).
10. A subway interconnection passage freezing method construction model test method, according to claim 1, the subway interconnection passage freezing method construction model test device is characterized in that: the operation steps comprise that,
s1, preparing a soil sample, preparing the soil sample according to a test scheme and a similar principle, and sealing and standing the soil sample to uniformly mix the soil sample;
s2, assembling equipment, mounting the equipment, placing the soil sample in the device in a layered mode, and standing the soil sample;
s3, testing, namely after the soil sample is maintained, punching a plurality of holes in advance on the surface of the soil sample to simulate pressure relief holes in actual engineering, and starting a freezing unit to freeze; simultaneously starting a pressurizing unit to apply preset pressure to the soil sample to simulate the formation pressure; starting a penetration unit to seep water into the soil sample, and recording data through a monitoring unit;
s4, performing a tunneling test, changing the temperature required by the set negative freezing temperature when the temperature of the soil sample reaches a preset temperature, starting a tunneling unit to enable the drill bit to penetrate through the soil body, moving the drill bit out, and if the frozen soil strength is monitored, changing the pressure of a pressurizing unit and observing the deformation of the soil sample; if the stability of the communication channel is detected, the communication channel can be supported;
and S5, performing a thawing-sinking test, namely starting the test by adjusting the freezing unit, and detecting a temperature field and a displacement field by the monitoring unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116399732A (en) * | 2023-06-08 | 2023-07-07 | 北京科技大学 | Visual test system and method for rapid auxiliary rock breaking through freezing and thawing cold and hot impact |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946011A (en) * | 2021-03-10 | 2021-06-11 | 金陵科技学院 | Soil body pressure water supplementing freeze thawing device for simulating bidirectional freezing |
| CN113565515A (en) * | 2021-07-24 | 2021-10-29 | 郑州大学 | Device and method for testing pore water pressure in site during subway communication channel freezing method construction |
| CN113607919A (en) * | 2021-07-29 | 2021-11-05 | 海南大学 | Frost heaving and thawing sinking test device |
| CN215065831U (en) * | 2021-06-07 | 2021-12-07 | 东华理工大学 | High-ground-stress high-water-head vertical shaft freezing model test device |
| CN115308022A (en) * | 2022-08-03 | 2022-11-08 | 北京交通大学 | Subway connection channel freezes analogue test system |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946011A (en) * | 2021-03-10 | 2021-06-11 | 金陵科技学院 | Soil body pressure water supplementing freeze thawing device for simulating bidirectional freezing |
| CN215065831U (en) * | 2021-06-07 | 2021-12-07 | 东华理工大学 | High-ground-stress high-water-head vertical shaft freezing model test device |
| CN113565515A (en) * | 2021-07-24 | 2021-10-29 | 郑州大学 | Device and method for testing pore water pressure in site during subway communication channel freezing method construction |
| CN113607919A (en) * | 2021-07-29 | 2021-11-05 | 海南大学 | Frost heaving and thawing sinking test device |
| CN115308022A (en) * | 2022-08-03 | 2022-11-08 | 北京交通大学 | Subway connection channel freezes analogue test system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116399732A (en) * | 2023-06-08 | 2023-07-07 | 北京科技大学 | Visual test system and method for rapid auxiliary rock breaking through freezing and thawing cold and hot impact |
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