CN214574194U - Test device for stratum migration caused by water leakage and sand leakage of modular foundation pit engineering - Google Patents
Test device for stratum migration caused by water leakage and sand leakage of modular foundation pit engineering Download PDFInfo
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- CN214574194U CN214574194U CN202120400934.XU CN202120400934U CN214574194U CN 214574194 U CN214574194 U CN 214574194U CN 202120400934 U CN202120400934 U CN 202120400934U CN 214574194 U CN214574194 U CN 214574194U
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Abstract
A test device for stratum migration caused by water and sand leakage in modular foundation pit engineering is disclosed. The device comprises an underground water replenishing water tank, a water replenishing joint, a water level control ball valve, a drainage valve, a foundation pit soil body test box, a leak source control channel, a water sand protection flow guide device, a bottom frame, trundles, an inner clamping type sensor bracket, a laser displacement sensor, a module connecting plate, connecting bolts, an automatic water sand amount measuring device, a leak source sealing plug and a water stopping sealing strip; the utility model discloses the effect: the system has the comprehensive functions of underground water level control, leakage point position change, leakage control, water-soil separation, automatic measurement, visual test and modular assembly, and can meet the requirements of qualitative and quantitative analysis of the disaster occurrence and development mechanism and parameter change rule of each stage of water and sand leakage in foundation pit engineering, thereby providing a theoretical basis for prevention and treatment of water and sand leakage disasters in foundation pit engineering construction.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering is experimental, concretely relates to modularization foundation ditch engineering leaks water and leaks sand and causes test device that stratum migration.
Background
Along with the progress of society, the development of countries and the continuous promotion of urbanization process in recent years, the construction of various large-scale buildings and underground engineering is more and more, and the scale is larger and larger. The construction of underground engineering and large building underground structure is to dig deep foundation pit in the stratum, and with the development of underground engineering, the excavation of foundation pit also develops towards the deep, big and long directions. For foundation pit engineering construction in a water-rich sand layer, road surface collapse accidents caused by water leakage and sand leakage are frequent, road surface cracking is caused to influence traffic, casualties are caused to form major safety accidents. In order to ensure the safety of deep foundation pit engineering construction, the test research is carried out on the stratum migration rule and mechanism caused by water leakage and sand leakage of the foundation pit, and the analysis of the migration characteristics of different soil bodies along with underground water becomes more important. For an actual soil body, the development process of water leakage and sand leakage can be simulated through a test means, the flowing rule and the influence range of the soil body are obtained, engineering disasters are analyzed according to parameters obtained through the test, and reference basis can be provided for disaster evaluation and early warning. With the continuous development of cracks and subsidence, the building enclosure structure is subjected to the process of disaster evolution such as water leakage, soil particle erosion, water leakage and sand leakage, the mutual influence and the internal rule of factors such as water leakage degree, soil body erosion degree and sand leakage quality can be researched through a model test, and a theoretical basis is provided for the construction safety control of underground engineering.
The existing water leakage and sand leakage test method and equipment aim at foundation pit engineering and cannot reasonably simulate groundwater supply in a far field, and meanwhile, the test equipment also meets the requirement of test expansibility in different scales, so that a set of modularized test device for simulating stratum migration caused by water leakage and sand leakage in foundation pit engineering is urgently needed.
Disclosure of Invention
In order to solve the problem, the utility model aims to provide a modularization foundation ditch engineering leaks water and leaks sand and causes test device that stratum migration.
In order to achieve the purpose, the test device for stratum migration caused by water and sand leakage of the modular foundation pit engineering provided by the utility model comprises an underground water replenishing water tank, a water replenishing joint, a water level control ball valve, a water drainage valve, a foundation pit soil body test box, a leakage point control channel, a water and sand protection flow guide device, a bottom frame, a trundle, an inner clamping type sensor bracket, a laser displacement sensor, a module connecting plate, a connecting bolt, an automatic water and sand amount measuring device, a leakage point sealing plug and a water stop sealing strip; the upper end of the foundation pit soil body test box is open, two adjacent side surfaces are made of full-hole fine-mesh steel plates, and the other two side surfaces are made of transparent and visible polycarbonate plates; the plane of the groundwater make-up water tank is L-shaped, the L-shaped side surface positioned at the inner side is open, and the opening is blocked by a full-hole fine steel plate on the foundation pit soil body test box; the foundation pit soil body test box and the underground water replenishing water box are mutually connected by using a module connecting plate and a connecting bolt which are arranged at the edge of a connecting area, and the interface of the side surface and the edge of the lower end is sealed by using a water stopping sealing strip; the lower parts of the foundation pit soil body test box and the underground water replenishing water tank are respectively provided with a bottom frame; the bottom surface corner of the bottom frame is provided with a caster; a plurality of leak source control channels are formed at the outer corner of the foundation pit soil body test box along the vertical direction; each leakage point control channel is internally provided with a leakage point seal plug; the water sand protection and flow guide device is arranged on the outer side surface of a foundation pit soil body test box positioned on the outer side of the leak point control channel; the automatic water sand amount measuring device is arranged on the ground below the water sand protection flow guide device outlet; the inner clamping type sensor bracket is in a door shape, and the two lower ends of the inner clamping type sensor bracket are respectively arranged at the tops of two opposite side surfaces on the foundation pit soil body test box in a moving mode; a plurality of laser displacement sensors are arranged on a cross beam of the inner clamping type sensor bracket at intervals; the bottom of the underground water make-up water tank and the bottom of the foundation pit soil body test box are respectively provided with a drainage valve; the water replenishing joint is arranged on the side surface of the underground water replenishing tank; the water level control ball valve is installed at the bottom of the water replenishing connector and used for automatically controlling the opening and closing of the water replenishing connector.
And a plurality of groups of water replenishing joints and water level control ball valves are arranged on the side surface of the underground water replenishing tank along the vertical direction so as to control different test water levels.
The water sand protection and flow guide device is made of organic glass and consists of a front side splash-proof baffle and a lower inclined flow guide groove.
The utility model has the advantages and positive effects that: when the test underground water level exceeds the water level control ball valve, the water supplementing joint automatically stops supplementing water, and when the water level in the underground water supplementing water tank is lower than the water level control ball valve, the water supplementing joint is automatically opened, so that underground water supplementation can be truly simulated, and a stable hydraulic boundary condition is formed; different water level control ball valves with different heights are opened, so that different underground water levels can be simulated; the full-hole fine steel plate can fully supplement underground water and cannot cause soil loss; the water sand protection and flow guide device made of organic glass does not influence the acquisition of test images, and can also achieve the purpose of preventing water sand from splashing and guiding; the leakage point control channel and the leakage point plugging plug can change the position of the leakage point for testing, and can actively control the occurrence and stop of leakage; the module connecting plate, the connecting bolt and the water stop sealing strip are reasonably designed, so that the sand box and the water tank can be respectively tested or combined according to needs, and meanwhile, a plurality of testing devices can be assembled to expand the test scale. The test device has the comprehensive functions of underground water level control, leakage point position change, leakage control, water-soil separation, automatic measurement, visual test and modular assembly, and can meet the requirements of qualitative and quantitative analysis of disaster occurrence and development mechanisms and parameter change rules of foundation pit engineering water and sand leakage stages.
Drawings
FIG. 1 is a perspective view of a test device for formation migration caused by water and sand leakage in the modular foundation pit engineering provided by the present invention;
FIG. 2 is a left side view of the test device for the formation migration caused by water and sand leakage in the modular foundation pit engineering provided by the present invention;
FIG. 3 is a top view of the testing apparatus for formation migration caused by water and sand leakage in the modular foundation pit engineering provided by the present invention;
Detailed Description
For a further understanding of the contents, features and effects of the present invention, the following embodiments are enumerated in conjunction with the accompanying drawings and described in detail below:
as shown in fig. 1-3, the utility model provides a test device for stratum migration caused by water and sand leakage in modular foundation pit engineering comprises a groundwater make-up water tank 1, a make-up water joint 2, a water level control ball valve 3, a drainage valve 4, a foundation pit soil body test box 5, a leak source control channel 8, a water and sand protection and flow guide device 9, a bottom frame 10, a caster 12, an inner clamp type sensor support 13, a laser displacement sensor 14, a module connecting plate 15, a connecting bolt 16, an automatic water and sand measuring device 17, a leak source sealing plug 18 and a water-stop sealing strip 19; the upper end of the foundation pit soil body test box 5 is open, two adjacent side faces are made of full-hole fine steel plates 6, and the other two side faces are made of transparent and visible polycarbonate plates 7; the plane of the groundwater make-up water tank 1 is L-shaped, the L-shaped side surface positioned at the inner side is open, and the opening is blocked by a full-hole fine steel plate 6 on a foundation pit soil body test box 5; the foundation pit soil body test box 5 and the underground water make-up water tank 1 are mutually connected by a module connecting plate 15 and a connecting bolt 16 which are arranged at the edge of a connecting area, and the interface of the side surface and the lower end edge is sealed by a water-stop sealing strip 19; the lower parts of the foundation pit soil body test box 5 and the underground water make-up water tank 1 are respectively provided with a bottom frame 10; the bottom surface corner of the bottom frame 10 is provided with a caster 12; a plurality of leak source control channels 8 are formed at the outer corner of the foundation pit soil body test box 5 along the vertical direction; a leakage point sealing plug 18 is arranged in each leakage point control channel 8; the water sand protection and flow guide device 9 is arranged on the outer side surface of the foundation pit soil body test box 5 positioned outside the leak point control channel 8; the automatic water sand amount measuring device 17 is arranged on the ground below the discharge port of the water sand protection flow guide device 9; the inner clamping type sensor bracket 13 is in a door shape, and the two lower ends are respectively arranged at the tops of two opposite side surfaces on the foundation pit soil body test box 5 in a moving mode; a plurality of laser displacement sensors 14 are arranged on a cross beam of the inner clamping type sensor bracket 13 at intervals; the bottom parts of the underground water make-up water tank 1 and the foundation pit soil body test box 5 are respectively provided with a drainage valve 4; the water replenishing joint 2 is arranged on the side surface of the underground water replenishing tank 1; the water level control ball valve 3 is installed at the bottom of the water replenishing connector 2 and used for automatically controlling the opening and closing of the water replenishing connector 2.
And a plurality of groups of water replenishing joints 2 and water level control ball valves 3 are arranged on the side surface of the underground water replenishing tank 1 along the vertical direction so as to control different test water levels.
The water sand protection and flow guide device 9 is made of organic glass and consists of a front side splash-proof baffle and a lower inclined flow guide groove.
The foundation ditch engineering hourglass sand that now carries out to certain leak source position leaks the hourglass sand and causes the visual model test of soil body migration as an example, explains the utility model provides a modularization foundation ditch engineering hourglass water leaks sand and causes the concrete use of test device that stratum migration, and concrete implementation method is as follows:
(1) ensuring that foreign matters do not exist in the groundwater make-up water tank 1 and the foundation pit soil body test box 5 on the device, enabling each leak source sealing plug 18 to be in a closed state, then mutually connecting one or more groundwater make-up water tanks 1 and the foundation pit soil body test box 5 by using a module connecting plate 15 and a connecting bolt 16 which are arranged at the edge of a connecting area according to the test scale, and sealing the interface of the side surface and the lower end edge by using a water-stop sealing strip 19;
(2) filling required sand into the foundation pit soil body test box 5, filling and tamping in layers according to calculation, ensuring the soil surface to be horizontal, and paving markers on the inner side surface of the polycarbonate plate 7 corresponding to the positions of each filling layer until the required height is reached by filling;
(3) closing the drainage valve 4, connecting and opening the water replenishing joint 2 at the same filling height with a water supply pipe, and supplying water into the groundwater replenishing water tank 1;
(4) continuously percolating water in the groundwater make-up water tank 1 into a foundation pit soil body test box 5 through a full-hole fine-mesh steel plate 6, automatically stopping water supply when the water level in the groundwater make-up water tank 1 rises to a water level control ball valve 3 on a water supply make-up joint 2, and standing for 24 hours until the soil body is fully saturated;
(5) moving the inner clamping type sensor bracket 13 to a specific position, connecting the laser displacement sensor 14 with an upper computer, then utilizing the laser displacement sensor 14 to emit laser downwards and collect surface deformation data, and simultaneously starting the automatic water sand quality measuring device 17;
(6) according to the position of the leakage point, slowly opening the leakage point sealing plug 18 at the position to open the corresponding leakage point control channel 8, wherein at the moment, the water-sand mixture in the foundation pit soil test box 5 continuously runs off outwards through the leakage point control channel 8 and flows into the water-sand quality automatic measuring device 17 through the water-sand protection flow guide device 9, the laser displacement sensor 14 is continuously used for measuring the deformation data of the soil surface in real time, the water-sand quality automatic measuring device 17 is used for measuring the running-off quality in real time, and a dynamic video recorder is used for carrying out image acquisition through the transparent polycarbonate plate 7; in the process, once the water level in the groundwater make-up water tank 1 is lowered to be lower than the water level control ball valve 3 on the water make-up joint 2 for supplying water, water is automatically supplemented;
(7) after the surface of the earth is obviously collapsed and the earth is damaged, slowly closing the leakage point seal plug 18 and stopping the test;
(8) stopping supplying water after the soil in the foundation pit soil test box 5 is deformed stably, opening the drainage valve 4, draining the water in the groundwater make-up water tank 1 and the foundation pit soil test box 5, and then removing the soil in the foundation pit soil test box 5;
(9) and changing the position of the leakage point control channel 8, the opening position of the water replenishing joint 2 and the soil filling height, and repeating the test process.
Claims (3)
1. The utility model provides a test device that modularization foundation ditch engineering leaks water and leaks sand and causes stratum migration which characterized in that: modularization foundation ditch engineering leak water and leak sand and initiate test device of stratum migration include: the device comprises a groundwater make-up water tank (1), a make-up water joint (2), a water level control ball valve (3), a drainage valve (4), a foundation pit soil test box (5), a leak source control channel (8), a water sand protection flow guide device (9), a bottom frame (10), a caster (12), an inner clamping type sensor support (13), a laser displacement sensor (14), a module connecting plate (15), a connecting bolt (16), a water sand amount automatic measuring device (17), a leak source sealing plug (18) and a water stop sealing strip (19); the upper end of the foundation pit soil body test box (5) is open, two adjacent side faces are made of full-hole fine steel plates (6), and the other two side faces are made of transparent and visible polycarbonate plates (7); the plane of the groundwater make-up water tank (1) is L-shaped, the L-shaped side surface positioned at the inner side is open, and the opening is blocked by a full-hole fine steel plate (6) on a foundation pit soil body test box (5); the foundation pit soil body test box (5) and the underground water replenishing tank (1) are mutually connected by a module connecting plate (15) and a connecting bolt (16) which are arranged at the edge of a connecting area, and the interface of the side surface and the edge of the lower end is sealed by a water-stopping sealing strip (19); the lower parts of the foundation pit soil body test box (5) and the underground water replenishing water tank (1) are respectively provided with a bottom frame (10); the bottom surface corner of the bottom frame (10) is provided with a caster (12); a plurality of leak source control channels (8) are formed at the outer corner of the foundation pit soil body test box (5) along the vertical direction; a leakage point sealing plug (18) is arranged in each leakage point control channel (8); the water sand protection and flow guide device (9) is arranged on the outer side surface of the foundation pit soil body test box (5) positioned outside the leak point control channel (8); the automatic water sand amount measuring device (17) is arranged on the ground below the discharge port of the water sand protection flow guide device (9); the inner clamping type sensor bracket (13) is in a door shape, and the two lower ends are respectively arranged at the tops of two opposite side surfaces on the foundation pit soil body test box (5) in a moving mode; a plurality of laser displacement sensors (14) are arranged on a cross beam of the inner clamping type sensor bracket (13) at intervals; the bottom parts of the underground water replenishing water tank (1) and the foundation pit soil body test box (5) are respectively provided with a drainage valve (4); the water replenishing joint (2) is arranged on the side surface of the underground water replenishing tank (1); the water level control ball valve (3) is installed at the bottom of the water replenishing connector (2) and used for automatically controlling the opening and closing of the water replenishing connector (2).
2. The test device for testing stratum migration caused by water and sand leakage in modular foundation pit engineering according to claim 1, characterized in that: and a plurality of groups of water replenishing joints (2) and water level control ball valves (3) are arranged on the side surface of the underground water replenishing tank (1) along the vertical direction so as to control different test water levels.
3. The test device for testing stratum migration caused by water and sand leakage in modular foundation pit engineering according to claim 1, characterized in that: the water sand protection and flow guide device (9) is made of organic glass and consists of a front side splash-proof baffle and a lower inclined flow guide groove.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112746635A (en) * | 2021-02-23 | 2021-05-04 | 中国民航大学 | Test device for stratum migration caused by water leakage and sand leakage of modular foundation pit engineering |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746635A (en) * | 2021-02-23 | 2021-05-04 | 中国民航大学 | Test device for stratum migration caused by water leakage and sand leakage of modular foundation pit engineering |
| CN112746635B (en) * | 2021-02-23 | 2024-05-07 | 中国民航大学 | Test device for triggering stratum migration by water leakage and sand leakage of modularized foundation pit engineering |
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