CN111257543A - Cold region tunnel linear water-containing zone frost heaving model and preparation and test methods thereof - Google Patents
Cold region tunnel linear water-containing zone frost heaving model and preparation and test methods thereof Download PDFInfo
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Abstract
The invention relates to the field of tunnel engineering model tests, in particular to a linear water-containing zone frost heaving model of a tunnel in a cold region and preparation and test methods thereof. The system comprises a frost heaving surrounding rock system, an environment regulation and control system and a frost heaving force data acquisition system; the frost heaving surrounding rock system comprises simulated surrounding rocks, a secondary lining and a frost heaving surrounding rock linear fractured zone, wherein the secondary lining penetrates through the simulated surrounding rocks to be distributed, the frost heaving surrounding rock linear fractured zone is a strip-shaped hole which is arranged on the simulated surrounding rocks and can be filled with water, and the frost heaving surrounding rock linear fractured zone comprises a surrounding rock linear water-containing zone distributed in the simulated surrounding rocks and a lining rear water-containing zone distributed between the simulated surrounding rocks and the secondary lining; the method can objectively reflect the influence of different water storage structures of surrounding rocks on the frost heaving force of the tunnel, and simulate the influence and distribution rule of different linear water containing zone lengths, positions, widths and the like on the frost heaving force of the tunnel under different burial depths and temperature environments through model tests, thereby providing guidance for preventing and controlling the frost heaving disaster of the tunnel in a cold region.
Description
Technical Field
The invention relates to the field of tunnel engineering model tests, in particular to a linear water-containing zone frost heaving model of a tunnel in a cold region and preparation and test methods thereof.
Background
China is one of three countries with the largest distribution area of frozen soil in the world, and the tunnel constructed in a frozen soil water-rich area is easy to generate larger frost heaving force to further cause the problem of frost damage, such as concrete falling, lining cracking, water leakage, ice hanging, peeling and the like, which seriously affects the tunnel structure and operation safety, so the research on the frost heaving damage law of tunnel surrounding rocks is imperative.
On-site test and model test research are carried out by many scholars at home and abroad on the deformation of the tunnel in the cold region and the frost heaving property of the surrounding rock, and local water storage at the defect position inside the tunnel surrounding rock is found to be the main cause of frost heaving damage of the surrounding rock. In actual engineering, the surrounding rock defects mostly exist in the modes of karst caves, holes, cracks and the like; in tunnel construction, a large-scale cavity is generally not generated behind a supporting lining, but a small cavity or a flat crack and the like are possibly generated behind the lining due to insufficient compactness of a supporting arch frame or anchor concrete and surrounding rocks. When these areas are frozen by filling with groundwater, they tend to frost heave the lining and surrounding rock, creating additional frost heave forces between the surrounding rock and the lining. The cold region tunnel frozen expansion force indoor test model in the prior art does not comprehensively consider the influence of water stored at each part of the surrounding rock on the tunnel frozen expansion force, and the obtained test data can not objectively and truly reflect the influence of different water storage structures of the surrounding rock on the tunnel frozen expansion force.
Disclosure of Invention
The invention aims to provide a cold region tunnel linear water-containing zone frost heaving model and preparation and test methods thereof, which objectively reflect the influence of different water storage structures of surrounding rocks on tunnel frost heaving force, simulate the influence and distribution rule of different linear water-containing zone lengths, positions, widths and the like on tunnel frost heaving force under different burial depths and temperature environments through model tests and provide guidance for cold region tunnel frost heaving disaster prevention and control.
In order to solve the technical problems, the invention adopts the technical scheme that: a linear water-bearing zone frost heaving model for a tunnel in a cold region comprises a frost heaving surrounding rock system, an environment regulation and control system and a frost heaving force data acquisition system;
the frost heaving surrounding rock system comprises simulated surrounding rocks, a secondary lining and a frost heaving surrounding rock linear fractured zone, wherein the secondary lining penetrates through the simulated surrounding rocks to be distributed, the frost heaving surrounding rock linear fractured zone is a strip-shaped hole which is arranged on the simulated surrounding rocks and can be filled with water, and the frost heaving surrounding rock linear fractured zone comprises a surrounding rock linear water-containing zone distributed in the simulated surrounding rocks and a lining rear water-containing zone distributed between the simulated surrounding rocks and the secondary lining;
the environment regulation and control system comprises a refrigerating device and a double-shaft reaction frame device; the refrigerating device comprises a hollow sandwich plate which is arranged around the periphery of the simulated surrounding rock, a plurality of rib plates which are distributed in a criss-cross mode are arranged in the inner cavity of the hollow sandwich plate, the inner cavity of the hollow sandwich plate is divided into a plurality of chambers by the plurality of rib plates, through holes for refrigerating liquid to circulate in the adjacent chambers are formed in the rib plates, and the hollow sandwich plate is also provided with an input valve for refrigerating liquid to enter and an output valve for refrigerating liquid to discharge; the reaction frame device comprises a frame structure sleeved on the periphery of the hollow sandwich plate, and a plurality of jacks for applying load to the simulated surrounding rock through the hollow sandwich plate are arranged on the frame structure at intervals;
the frost heaving force data acquisition system comprises a plurality of sensor groups which are respectively arranged between the simulated surrounding rock and the secondary lining and are positioned on the vault, the arch foot, the side wall and the inverted arch of the secondary lining, any one of the sensor groups comprises a pressure sensor and a temperature sensor, and all the pressure sensors and the temperature sensors are connected with a computer.
Preferably, the simulated surrounding rock is cubic, and the secondary lining is distributed through the center of the simulated surrounding rock along the horizontal direction.
Preferably, the number of hollow sandwich panels is four, and four hollow sandwich panels are respectively arranged on four side walls of the simulated surrounding rock corresponding to the circumferential direction of the secondary lining.
Preferably, the hollow sandwich plate comprises two base plates which are distributed in parallel at intervals, and the outer edges of the two base plates are connected through a strip-shaped sealing plate.
Preferably, in the same hollow sandwich plate, the sealing plate and the outer side of a base plate far away from the simulated surrounding rock are both provided with insulating layers; the material of heat preservation is polyurethane, and the thickness of heat preservation is not less than 3 cm.
Preferably, the frame structure comprises a rectangular frame, and two horizontal load plates and two vertical load plates fixed on the rectangular frame, and the cylinder ends of the jacks are respectively and vertically fixed on the corresponding horizontal load plate or vertical load plate.
Preferably, the secondary lining is manufactured by welding steel plates, and a threading hole for threading the leg wire of the inductor group is formed in the middle of the secondary lining.
A preparation method of a linear water-containing zone frost heaving model of a tunnel in a cold region comprises the following steps:
1) manufacturing a secondary lining, a refrigerating device and a double-shaft reaction frame device;
2) sleeving the secondary lining, the refrigerating device and the double-shaft reaction frame device in sequence and then vertically placing the secondary lining, the refrigerating device and the double-shaft reaction frame device on a rigid horizontal plate;
3) mutually winding the blasting fuse and the steel wire to form a long-strip-shaped water-containing strip generating piece, winding part of the water-containing strip generating piece on the periphery of the secondary lining in a shape corresponding to the water-containing strip at the back of the lining, and fixing the rest of the water-containing strip generating piece on the rigid horizontal plate in a shape corresponding to the linear water-containing strip of the surrounding rock;
4) filling and compacting simulated surrounding rocks between the secondary lining and the refrigerating device, fixedly arranging inductor groups at the periphery of the secondary lining and corresponding to the positions of the vault, the arch springing, the side wall and the inverted arch of the secondary lining after filling half of the simulated surrounding rocks, and continuously filling the simulated surrounding rocks;
5) after the filling of the simulated surrounding rock is finished, rotating by 90 degrees to enable the secondary lining to be in a horizontal state;
6) and igniting and blasting the blasting fuse, pulling out the steel wire, flushing gunpowder residues, forming a surrounding rock linear water-bearing zone inside the simulated surrounding rock, and forming a lining rear water-bearing zone between the simulated surrounding rock and the secondary lining.
A test method of a linear water-containing zone frost heaving model of a tunnel in a cold region comprises the following steps:
1) starting a refrigerating device, introducing liquid ammonia at normal pressure and low temperature into the hollow sandwich plate through an input valve, and regulating and controlling the input and output quantity of the liquid ammonia to keep the temperature of the simulated surrounding rock below 0 ℃ for 15 minutes;
2) according to the actual situation of the simulated tunnel surrounding rock, applying vertical and horizontal loads to the simulated surrounding rock through a jack, injecting water into the linear fracture zone of the frost heaving surrounding rock, and plugging a water outlet on the outer side of the surrounding rock;
3) according to the actual situation of the simulated surrounding rock, the input and output quantity of liquid ammonia is adjusted, the temperature of the simulated surrounding rock is reduced or increased, the reading change of the soil pressure gauge is monitored and recorded, and a basis is provided for the analysis of the frost heaving force.
Advantageous effects
According to the cold region tunnel linear water-containing zone frost heaving model and the test method, the influence and the distribution rule of the length, the position, the width and the like of different linear water-containing zones on the tunnel frost heaving force under different burial depths and temperature environments are simulated in a test, and guidance is provided for prevention and control of cold region tunnel frost heaving disasters. Considering the plane strain stress state of tunnel surrounding rock, a biaxial reaction frame loading system simulating the tunnel burial depth condition is designed; a low-temperature refrigerating device is constructed by utilizing the hollow sandwich plate, and the low-temperature environment of tunnel surrounding rock is simulated by regulating and controlling the flow of liquid ammonia.
According to the preparation method of the linear water-containing zone frost heaving model of the tunnel in the cold region, the characteristic that the volume of a blasting fuse is reduced after combustion is utilized in the linear water-containing zone structure in the surrounding rock and behind the lining, and the preparation of any linear water-containing crack is prefabricated.
Drawings
FIG. 1 is a schematic longitudinal section structure diagram of a linear water-containing zone frost heaving model of a tunnel in a cold region;
FIG. 2 is a sectional view taken along line A-A in FIG. 1;
FIG. 3 is a schematic structural view of a portion of the system of frost heaving surrounding rock of the present invention;
FIG. 4 is a schematic structural view of a portion of a biaxial reaction frame assembly according to the present invention;
FIG. 5 is a schematic diagram of the distribution of sensor groups in the system for acquiring frozen force data according to the present invention;
the labels in the figure are: 1. the method comprises the following steps of simulating surrounding rock, 2, a lining rear water-containing zone, 3, a secondary lining, 4, a surrounding rock linear water-containing zone, 5, a double-shaft reaction frame device, 501, a jack, 502, a frame structure, 502-1, a vertical load plate, 502-2, a rectangular frame, 502-3, a horizontal load plate, 6, a refrigerating device, 601, a sealing plate, 602, a base plate, 603, a heat insulation layer, 604, a rib plate, 605, a through hole, 606, an output valve, 607, an input valve, 7, a temperature sensor, 8 and a pressure sensor.
Detailed Description
As shown in figure 1, the linear water-bearing zone frost heaving model for the tunnel in the cold region mainly comprises a frost heaving surrounding rock system, an environment regulation and control system and a frost heaving force data acquisition system.
As shown in fig. 3, the frost heaving surrounding rock system comprises simulated surrounding rock 1, secondary lining 3 and a frost heaving surrounding rock linear fissure zone. The simulated surrounding rock 1 is of a cubic structure, the secondary lining 3 is formed by splicing and welding steel plates and penetrates through the center of the simulated surrounding rock 1 in the horizontal direction to be distributed, and the surrounding rock and the lining structure in a real tunnel are simulated. The linear fissure zone of the frost heaving surrounding rock is a strip-shaped hole which is arranged on the simulated surrounding rock 1 and can be filled with water, two ends of the linear fissure zone are both open and can be closed through blind heads, so that water can be filled into the linear fissure zone, and the linear fissure zone is matched with an environment regulation and control system to truly simulate the influence of a water-bearing zone structure on the frost heaving force of a tunnel. The linear fissure zone of the frost heaving surrounding rock comprises a surrounding rock linear water-containing zone 4 distributed in a simulated surrounding rock 1 and a lining rear water-containing zone 2 distributed between the simulated surrounding rock 1 and a secondary lining 3. The real situation is objectively reflected through the influence and the distribution rule of the length, the position, the width and the like of different linear water-containing zones on the frost heaving force of the tunnel, and accurate guidance is provided for preventing and controlling the frost heaving disaster of the tunnel in the cold region.
The environment conditioning system comprises a refrigeration device 6 and a double-shaft reaction frame device 5.
Referring to fig. 1 and 2, the refrigerating apparatus 6 includes four hollow sandwich plates respectively disposed on the upper, lower, left, and right sides of the simulated surrounding rock 1. The hollow sandwich plate is used for generating low temperature and simulating the ambient temperature of the tunnel on the one hand; on the other hand, it is also used for a carrier for the biaxial reaction frame device 5 to apply horizontal and vertical loads to the simulated surrounding rock 1. Any one hollow sandwich plate comprises a base plate 602 which is made of two steel plates which correspond to the shape and size of the side wall of the simulated surrounding rock 1 and are distributed in parallel at intervals, and the outer edges of the two base plates 602 are sealed, welded and fixed through a sealing plate 601 which is long and made of the steel plates. An input valve 607 and an output valve 606 for the refrigerant liquid to enter and exit the hollow sandwich plate inner cavity are arranged on the sealing plate 601. In order to realize the load carrier function of the hollow sandwich plate, a plurality of ribs 604 distributed in a criss-cross manner are arranged in the inner cavity of the hollow sandwich plate. The inner cavity of the hollow sandwich plate is divided into a plurality of chambers by the plurality of ribbed plates 604, and through holes 605 for refrigerating liquid to circulate in the adjacent chambers are formed in the ribbed plates 604 in a penetrating mode so as to control the temperature of the simulated surrounding rock 1 uniformly.
In this embodiment, on the same hollow sandwich plate, all be equipped with heat preservation 603 in closing plate 601 and the base plate 602 outside of keeping away from simulation country rock 1 to reduce the heat loss in the experiment. The heat-insulating layer 603 is made of polyurethane, and the thickness of the heat-insulating layer 603 is not less than 3 cm.
Referring to fig. 1 and 4, the reaction frame device includes a frame structure 502 sleeved on the periphery of the hollow sandwich plate, and a plurality of jacks 501 for applying load to the simulated surrounding rock 1 through the hollow sandwich plate are arranged on the frame structure 502 at intervals. The frame structure 502 comprises a rectangular frame 502-2 formed by welding four angle steels, and two horizontal load plates 502-3 and two vertical load plates 502-1 fixed on the rectangular frame 502-2. Four jacks 501 are arranged on any one horizontal load plate 502-3 or vertical load plate 502-1. The cylinder body end of the jack 501 is respectively and vertically fixed on the corresponding horizontal load plate 502-3 or vertical load plate 502-1; the pressure heads of the jacks 501 act on the hollow sandwich plates at the corresponding positions respectively.
As shown in fig. 5, the system for acquiring frost heaving force data includes a plurality of sensor groups respectively disposed between the simulated surrounding rock 1 and the secondary lining 3 and located at the arch crown, arch foot, side wall and inverted arch of the secondary lining 3, any one of the sensor groups includes a pressure sensor 8 and a temperature sensor 7, all the pressure sensors 8 and the temperature sensors 7 are connected to a computer, and pressure and temperature information measured by the sensor group is recorded by the computer. And the middle part of the secondary lining 3 is provided with a threading hole for the foot thread of the inductor group to pass through so as to be connected to a computer.
The preparation method of the linear water-containing zone frost heaving model for the tunnel in the cold region comprises the following steps:
1) manufacturing four hollow sandwich plates in a secondary lining 3 and a refrigerating device 6 and a double-shaft reaction frame device 5;
2) sequentially sleeving a secondary lining 3, a refrigerating device 6 and a double-shaft reaction frame device 5, and vertically placing the sleeves on a rigid horizontal plate, wherein a filling space simulating the surrounding rock 1 is formed between the four hollow sandwich plates and the secondary lining 3;
3) selecting a civil blasting fuse cord and steel wires with equal length, winding the blasting fuse cord and the steel wires into a twist shape to form a long-strip-shaped water-containing strip generating piece, winding part of the water-containing strip generating piece on the periphery of a secondary lining 3 in a shape corresponding to a rear water-containing strip 2 of the lining, and fixing the rest of the water-containing strip generating piece on a rigid horizontal plate in a shape corresponding to a surrounding rock linear water-containing strip 4;
4) filling and compacting the simulated surrounding rock 1 between the secondary lining 3 and the refrigerating device 6, and after half of filling, continuously filling and compacting the simulated surrounding rock 1 after fixedly arranging inductor groups at the periphery of the secondary lining 3 and corresponding to the positions of the vault, the arch springing, the side wall and the inverted arch of the secondary lining 3;
5) after filling of the simulated surrounding rock 1 is completed, rotating by 90 degrees to enable the secondary lining 3 to be in a horizontal state;
6) and igniting and blasting the blasting fuse and drawing out the steel wire, and after flushing gunpowder residues by adopting high-pressure water, forming a surrounding rock linear water-containing zone 4 in the simulated surrounding rock 1 and forming a lining rear water-containing zone 2 between the simulated surrounding rock 1 and the secondary lining 3 to finish the manufacture of the model.
The test method of the linear water-containing zone frost heaving model of the tunnel in the cold region comprises the following steps:
1) the method comprises the following steps of (1) mounting and debugging a frost heaving force data acquisition system, connecting leg wires of a pressure sensor 8 and a temperature sensor 7 to a reader and a control computer after model making is completed, checking the mounting survival rate of a test element, and primarily debugging the working stability of the test system;
2) debugging a refrigeration system, connecting a refrigeration device 6 with a normal-pressure low-temperature liquid ammonia storage tank through an input valve 607 and an output valve 606, and simulating the freezing of the surrounding rock 1 by utilizing the flow of liquid ammonia in the low-temperature refrigeration device 6, wherein the freezing temperature is obtained by a temperature sensor 7 between the secondary lining 3 and the surrounding rock;
3) starting the refrigerating device 6, introducing liquid ammonia at normal pressure and low temperature into the hollow sandwich plate through the input valve 607, and regulating and controlling the input and output of the liquid ammonia to keep the temperature of the simulated surrounding rock 1 below 0 ℃ for 15 minutes;
4) according to the actual situation of the simulated tunnel surrounding rock, applying vertical and horizontal loads to the simulated surrounding rock 1 through a jack 501, injecting water into the linear fracture zone of the frost heaving surrounding rock, and plugging a water outlet at the outer side of the surrounding rock;
5) according to simulation country rock 1 actual conditions, adjustment liquid ammonia input and output volume reduces or risees the temperature of simulation country rock 1, and monitoring earth pressure gauge reading changes and the record provides the basis for the analysis of frozen power.
Claims (9)
1. The utility model provides a linear water-bearing zone frost heaving model of cold district tunnel which characterized in that: the system comprises a frost heaving surrounding rock system, an environment regulation and control system and a frost heaving force data acquisition system;
the frost heaving surrounding rock system comprises a simulated surrounding rock (1), a secondary lining (3) and a frost heaving surrounding rock linear fractured zone, wherein the secondary lining (3) penetrates through the simulated surrounding rock (1) to be distributed, the frost heaving surrounding rock linear fractured zone is a strip-shaped hole which is arranged on the simulated surrounding rock (1) and can be filled with water, and the frost heaving surrounding rock linear fractured zone comprises a surrounding rock linear water-containing zone (4) distributed inside the simulated surrounding rock (1) and a lining rear water-containing zone (2) distributed between the simulated surrounding rock (1) and the secondary lining (3);
the environment regulation and control system comprises a refrigerating device (6) and a double-shaft reaction frame device (5); the refrigerating device (6) comprises a hollow sandwich plate arranged around the simulated surrounding rock (1), a plurality of rib plates (604) distributed in a criss-cross mode are arranged in an inner cavity of the hollow sandwich plate, the inner cavity of the hollow sandwich plate is divided into a plurality of chambers by the plurality of rib plates (604), through holes (605) for refrigerating liquid to flow in the adjacent chambers are formed in the rib plates (604), and the hollow sandwich plate is also provided with an input valve (607) for refrigerating liquid to enter and an output valve (606) for refrigerating liquid to discharge; the reaction frame device comprises a frame structure (502) sleeved on the periphery of the hollow sandwich plate, and a plurality of jacks (501) used for applying load to the simulated surrounding rock (1) through the hollow sandwich plate are arranged on the frame structure (502) at intervals;
the frost heaving force data acquisition system comprises a plurality of inductor groups which are respectively arranged between the simulated surrounding rock (1) and the secondary lining (3) and positioned at the vault, the arch foot, the side wall and the inverted arch of the secondary lining (3), any one inductor group comprises a pressure sensor (8) and a temperature sensor (7), and all the pressure sensors (8) and the temperature sensor (7) are connected with a computer.
2. The linear water-bearing zone frost heaving model of the cold region tunnel according to claim 1, wherein: the shape of the simulated surrounding rock (1) is cubic, and the secondary lining (3) penetrates through the center of the simulated surrounding rock (1) in the horizontal direction and is distributed.
3. The linear water-bearing zone frost heaving model of the cold region tunnel according to claim 2, wherein: the number of the hollow sandwich plates is four, and the four hollow sandwich plates are respectively arranged on four side walls of the simulated surrounding rock (1) corresponding to the circumferential direction of the secondary lining (3).
4. The linear water-bearing zone frost heaving model of the cold region tunnel according to claim 3, wherein: the hollow sandwich plate comprises two base plates (602) which are distributed in parallel at intervals, and the outer edges of the two base plates (602) are connected through a strip-shaped sealing plate (601).
5. The linear water-bearing zone frost heaving model of the cold region tunnel according to claim 4, wherein: in the same hollow sandwich plate, the outer sides of a sealing plate (601) and a base plate (602) far away from the simulated surrounding rock (1) are respectively provided with an insulating layer (603); the heat insulation layer (603) is made of polyurethane, and the thickness of the heat insulation layer (603) is not less than 3 cm.
6. The linear water-bearing zone frost heaving model of the cold region tunnel according to claim 2, wherein: the frame structure (502) comprises a rectangular frame (502-2), two horizontal load plates (502-3) and two vertical load plates (502-1) which are fixed on the rectangular frame (502-2), and the cylinder ends of a plurality of jacks (501) are respectively and vertically fixed on the corresponding horizontal load plates (502-3) or vertical load plates (502-1).
7. The linear water-bearing zone frost heaving model of the cold region tunnel according to claim 2, wherein: the secondary lining (3) is made by welding steel plates, and the middle part of the secondary lining (3) is provided with a threading hole for the foot thread of the inductor group to penetrate out.
8. The preparation method of the linear water-containing zone frost heaving model of the cold region tunnel according to claim 1, wherein the preparation method comprises the following steps: the method comprises the following steps:
1) manufacturing a secondary lining (3), a refrigerating device (6) and a double-shaft reaction frame device (5);
2) sequentially sleeving the secondary lining (3), the refrigerating device (6) and the double-shaft reaction frame device (5) and then vertically placing the secondary lining, the refrigerating device and the double-shaft reaction frame device on a rigid horizontal plate;
3) mutually winding the blasting fuse and the steel wire to form a long-strip-shaped water-containing strip generating piece, winding part of the water-containing strip generating piece on the periphery of the secondary lining (3) corresponding to the shape of the water-containing strip (2) behind the lining, and fixing the rest of the water-containing strip generating piece on the rigid horizontal plate corresponding to the shape of the surrounding rock linear water-containing strip (4);
4) filling and compacting the simulated surrounding rock (1) between the secondary lining (3) and the refrigerating device (6), fixedly arranging inductor groups at the periphery of the secondary lining (3) and corresponding to the positions of the vault, the arch foot, the side wall and the inverted arch of the secondary lining (3) after half of filling, and then continuously filling the simulated surrounding rock (1);
5) after filling of the simulated surrounding rock (1) is finished, rotating by 90 degrees to enable the secondary lining (3) to be in a horizontal state;
6) and igniting and blasting the blasting fuse, pulling out the steel wire, flushing gunpowder residues, forming a surrounding rock linear water-bearing zone (4) in the simulated surrounding rock (1), and forming a lining rear water-bearing zone (2) between the simulated surrounding rock (1) and the secondary lining (3).
9. The test method of the cold region tunnel linear water-bearing zone frost heaving model of claim 1, wherein: the method comprises the following steps:
1) starting a refrigerating device (6), introducing liquid ammonia at normal pressure and low temperature into the hollow sandwich plate through an input valve (607), and regulating and controlling the input and output of the liquid ammonia to keep the temperature of the simulated surrounding rock (1) below 0 ℃ for 15 minutes;
2) according to the actual situation of the simulated tunnel surrounding rock, applying vertical and horizontal loads to the simulated surrounding rock (1) through a jack (501), injecting water into the linear fissure zone of the frost heaving surrounding rock, and plugging a water outlet at the outer side of the surrounding rock;
3) according to the actual situation of the simulated surrounding rock (1), the input and output quantity of liquid ammonia is adjusted, the temperature of the simulated surrounding rock (1) is reduced or increased, the reading change of the soil pressure gauge is monitored and recorded, and a basis is provided for the analysis of the frost heaving force.
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| CN113532903A (en) * | 2021-08-20 | 2021-10-22 | 中铁隧道局集团有限公司 | Freezing and thawing cycle environment cold region tunnel simulation test platform |
| CN114184635A (en) * | 2021-12-21 | 2022-03-15 | 河北交通职业技术学院 | Seasonal frozen soil area tunnel frozen-expansion force simulation test device and use method thereof |
| CN114813821A (en) * | 2022-03-29 | 2022-07-29 | 中铁第一勘察设计院集团有限公司 | Surrounding rock sample non-uniform frost heaving deformation environment simulation device and detection system |
| CN114858847A (en) * | 2022-04-16 | 2022-08-05 | 西南交通大学 | Test device and method for simulating frost heaving induced crack development process of lining structure |
| CN115436167A (en) * | 2022-08-04 | 2022-12-06 | 山东大学 | Operating tunnel surrounding rock-lining long-term interaction simulation test device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113532903A (en) * | 2021-08-20 | 2021-10-22 | 中铁隧道局集团有限公司 | Freezing and thawing cycle environment cold region tunnel simulation test platform |
| CN114184635A (en) * | 2021-12-21 | 2022-03-15 | 河北交通职业技术学院 | Seasonal frozen soil area tunnel frozen-expansion force simulation test device and use method thereof |
| CN114184635B (en) * | 2021-12-21 | 2023-09-08 | 河北交通职业技术学院 | Seasonal frozen soil area tunnel frost heaving force simulation test device and application method thereof |
| CN114813821A (en) * | 2022-03-29 | 2022-07-29 | 中铁第一勘察设计院集团有限公司 | Surrounding rock sample non-uniform frost heaving deformation environment simulation device and detection system |
| CN114813821B (en) * | 2022-03-29 | 2024-06-04 | 中铁第一勘察设计院集团有限公司 | Surrounding rock sample non-uniform frost heaving deformation environment simulation device and detection system |
| CN114858847A (en) * | 2022-04-16 | 2022-08-05 | 西南交通大学 | Test device and method for simulating frost heaving induced crack development process of lining structure |
| CN114858847B (en) * | 2022-04-16 | 2023-08-08 | 西南交通大学 | Test device and method for simulating development process of frost heaving induced cracks of lining structure |
| CN115436167A (en) * | 2022-08-04 | 2022-12-06 | 山东大学 | Operating tunnel surrounding rock-lining long-term interaction simulation test device and method |
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