CN212506453U - Indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation - Google Patents
Indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation Download PDFInfo
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- CN212506453U CN212506453U CN202021834888.6U CN202021834888U CN212506453U CN 212506453 U CN212506453 U CN 212506453U CN 202021834888 U CN202021834888 U CN 202021834888U CN 212506453 U CN212506453 U CN 212506453U
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Abstract
The utility model discloses an indoor model test system that simulation foundation ditch precipitation plane seepage flow and barricade warp. The utility model divides the model box into a soil box and a water box through the transverse baffle; a movable transverse foundation pit retaining wall is arranged in the soil box; the foundation pit retaining wall is connected with the front tank wall and the rear tank wall of the soil box by adopting telescopic water stop films, and forms a foundation pit model with the outer side edge of the soil box; a precipitation well pipe is arranged in the foundation pit model; 2-4 observation well pipes are arranged in the soil box; a plurality of displacement sensors and water and soil pressure sensors are arranged in the soil box to monitor the internal and external seepage of the foundation pit and the deformation of the retaining wall in the test process; water contained in the water tank can flow into the soil box through the transverse partition plate so as to realize simulation of seepage of the plane of the foundation pit. The utility model discloses to the test device of the three-dimensional seepage flow condition of current simulation simplify, the test process is more labour saving and time saving to same scientific research demand has been realized to less consumption.
Description
Technical Field
The utility model belongs to the technical field of foundation ditch precipitation engineering, concretely relates to indoor model test system that simulation foundation ditch precipitation plane seepage flow and barricade warp.
Background
With the development of urbanization, a large number of foundation pit projects emerge, but the phenomena of collapse of a plurality of foundation pits and uneven settlement and even damage of buildings outside the pits also appear, and particularly in areas with abundant underground water, the foundation pit precipitation can cause the retaining wall and the buildings outside the pits to generate non-negligible deformation. Zengfeng and Zhenggang[1-2]Researches show that cm-level deformation of the retaining wall can be caused by precipitation before excavation of the foundation pit, settlement of the ground outside the foundation pit and a building is further induced through stratum loss behind the retaining wall, and for deep research on an induction mechanism and a seepage-deformation evolution rule of the problem, an indoor scale model test needs to be scientifically developed according to similar theoretical requirements, so that the actual foundation pit precipitation process is truly reproduced in a repeatability, systematicness and economy mode.
The existing foundation pit rainfall test device mainly simulates the three-dimensional seepage condition, such as the situation of applying Chenghua[3]The method comprises the following steps of designing a 'test device of a dynamic precipitation indoor model of a foundation pit under the condition of a plurality of aquifers', surrounding a circle of water supply interlayer outside a model box, providing hydraulic supply for each aquifer of the model, not considering the condition of plane seepage, consuming time and labor in the test process, and depending on the plane seepage analysis result more in the design and analysis of foundation pit precipitation; for this purpose, Wangjiaxiu[4-5]The transparent soil test method and the device for simulating the underground seepage of the confined aquifer of the foundation pit precipitation can simulate the plane seepage of the foundation pit precipitation, but mainly pay attention to the seepage rule of the underground water in the foundation pit precipitation process (such as the distribution and the change of the water level outside the foundation pit), and the foundation pit retaining wall in the device is fixed and cannot deform (according to knowledge, the problem that the underground water outside the foundation pit leaks into the foundation pit along the gap between the foundation pit retaining wall and the side wall of the model test box body in the test process cannot be solved because the foundation pit retaining wall is fixed, so the colloid is filled in the gap of the side wall to block water, but the foundation pit is fixed and cannot freely deform at the same time), and the problem of the deformation of the retaining wall and the soil body caused by the seepage in the foundation pit precipitation process cannot be truly reproduced. Therefore, the utility model discloses creatively developed one kind can simulate foundation ditch precipitation plane seepage flow, can simulate seepage flow effect again and induce the room that the foundation ditch barricade warpThe internal model test system is used for solving the problems, so that the foundation pit dewatering process is truly reproduced, the seepage-deformation mechanism in the dewatering process is scientifically researched, and a reference is provided for engineering design and construction.
Reference documents:
[1] zhengjust, once surpassed the peak, study on lateral displacement of the underground continuous wall caused by diving and precipitation before excavation of the foundation pit [ J ], geotechnical engineering report 2013,35(12):2153 and 2163.
[2] The influence of preliminary precipitation on the deformation of the retaining wall before excavation of a large-area foundation pit is studied [ J ] geotechnical engineering report, 2017,39(06):1012 + 1021.
[3] An indoor model test method and a device [ P ] CN108222082A,2018-06-29 for dynamic precipitation of a foundation pit under the conditions of Chenghua, Liu Ling Hui, Cao Cheng Yong, Wang Yang, Ramingfeng, Yangwei super, Penglimin and multiple aquifers.
[4] Wangjian Xiu, Peak, Liushaoli, Liulaugh and Wulinbo, a transparent soil test device for simulating groundwater seepage of a confined aquifer of foundation pit precipitation [ P ]. CN105784562A, 2016-07-20.
[5] Wangjiangxiu, Liushaoli, Liulaugh, peak, Menglong, test method of transparent soil for simulating groundwater seepage of confined aquifer of foundation pit precipitation [ P ]. CN105756103A, 2016-07-13.
Disclosure of Invention
An object of the utility model is to prior art not enough, provide an indoor model test system that simulation foundation ditch precipitation plane seepage flow and barricade warp.
The purpose of the utility model is realized through the following technical scheme: the indoor model test system for simulating the seepage of the foundation pit dewatering plane and the deformation of the retaining wall comprises a model box; the model box is a narrow-strip-shaped box body with an opening at the upper end, a transverse partition plate with the same height as the model box is arranged in the model box, a hole is formed in the transverse partition plate, and the model box is divided into a soil box and a water box by the transverse partition plate; the soil box is filled with a test soil body, and a movable transverse foundation pit retaining wall is arranged in the soil box; the foundation pit retaining wall is connected with the front tank wall and the rear tank wall of the soil box by adopting telescopic water stop films, and forms a foundation pit model with the outer side edge of the soil box; a precipitation well pipe is arranged in the foundation pit model, and a water pipe connected with a micro water pump is arranged in the precipitation well pipe; 2-4 observation well pipes are arranged in the soil box, and a water alarm connected with a flexible rule with scales is explored into the observation well pipes during experiments to acquire dynamic water level in the wells; a plurality of displacement sensors and water and soil pressure sensors are arranged in the soil box to monitor the internal and external seepage of the foundation pit and the deformation of the retaining wall in the test process; water contained in the water tank can flow into the soil box through the transverse partition plate so as to realize simulation of seepage of the plane of the foundation pit.
Specifically, the front surface of the model box is an organic glass plate, and the back surface, the left side surface, the right side surface and the bottom surface of the model box are steel plates.
Specifically, the transverse partition plate is a perforated steel plate; the opening depth range of the opening steel plate is the depth range of soil in the soil box, the opening rate is greater than the porosity of the soil in the soil box, and the opening area is less than 60% of the area of the steel plate before opening; two layers of permeable geotextiles are laid on one side of the perforated steel plate, which is positioned on the soil box, so that soil in the soil box is prevented from leaking into the water box to cause soil loss in the test process.
Specifically, the width of the foundation pit model is determined according to the size of a prototype foundation pit by a reduced scale of 1:50-1: 25; the foundation pit retaining wall is made of organic glass; the width of the organic glass foundation pit retaining wall is 0.5-1cm smaller than the net width of the soil box, and the thickness and the length are determined according to a similar theory and a reduced scale of 1:50-1:25 according to the size of the original foundation pit retaining wall; the top of the organic glass foundation pit retaining wall is 5-10cm higher than the surface of the soil body in the soil box, so that the displacement sensor can be conveniently arranged.
Specifically, the telescopic water stop film is made of polyethylene materials, the length of the telescopic water stop film is the same as the depth of a soil body embedded into the soil box of the organic glass foundation pit retaining wall, and the width of the telescopic water stop film is 1/3-1/2 of the length of the organic glass foundation pit retaining wall; the flexible stagnant water film is folding in order to reserve the flexible volume of stretching out and drawing back of 1/3 times stagnant water film width at width direction, and its one side bonds with the lateral wall of soil box, and the opposite side bonds with organic glass foundation ditch barricade, and both sides bonding width is not less than the 1/4 of flexible stagnant water film width, and the setting up of flexible stagnant water film makes organic glass foundation ditch barricade both can free motion and has prevented organic glass foundation ditch barricade both sides infiltration simultaneously.
Specifically, the precipitation well pipe and the observation well pipe are both made of PVC materials, holes are formed along the whole length of a pipe body, hole positions are arranged in a quincunx shape, the diameter of each hole is 5-8 mm, the distance between every two holes is 3-5 cm, the diameter and the depth of a buried soil body are determined according to a similar theory according to the size of a prototype precipitation well pipe and the size of the observation well pipe in a reduced scale of 1:50-1:25, and the tops of the precipitation well pipe and the observation well pipe are 5-10cm higher than the surface of the soil body in the; two layers of permeable geotextile are wrapped outside the PVC precipitation well pipe and the observation well pipe, the permeable geotextile is wound on the well pipe by iron wires and fixed, and the iron wires are arranged at intervals of 10-15cm along the length direction of the well pipe.
Specifically, the precipitation well pipe is positioned in the middle of the foundation pit model in the width direction; an observation well pipe in the foundation pit model is positioned in the middle of the dewatering well pipe; 2-4 observation well pipes are uniformly arranged outside the foundation pit model in the middle along the direction far away from the foundation pit model;
specifically, the displacement sensor is arranged at a picking-out section of the foundation pit retaining wall extending out of the surface of the soil body; the water pressure sensors and the soil pressure sensors are arranged on two sides of the foundation pit retaining wall, wherein 3-5 groups of water pressure sensors and soil pressure sensors are uniformly arranged in the middle of the two side walls of the foundation pit retaining wall along the depth direction, and 2-3 cross-section water pressure sensors are uniformly arranged in the middle of the foundation pit model at different buried depth positions of the soil body outside the foundation pit model along the direction far away from the foundation pit retaining wall.
Specifically, holes are uniformly formed in the center of any steel plate side wall of the water tank along the depth direction, the distance between every two holes is 0.1-0.3m, and a household faucet is installed at the hole position; according to the experimental requirement, when the water level in the water tank is higher than the position of the designated faucet, the designated faucet is opened for draining, so that the height of the water level in the water tank is accurately controlled to be stabilized at the position of the designated faucet, and a stable constant head boundary condition is provided for foundation pit plane seepage.
Furthermore, the displacement sensor, the water pressure sensor and the soil pressure sensor are connected with an acquisition instrument; the water pipe connected with the micro water pump is connected with a flowmeter, and the flowmeter is connected with a recorder; the acquisition instrument and the recording instrument are connected to a computer.
The test device of the utility model realizes the simulation of seepage flow on the plane at one side of the foundation pit by using symmetry, so that the test process is more time-saving and labor-saving, and the same scientific research and engineering requirements are realized with less consumption; in addition, through set up flexible stagnant water membrane on organic glass foundation ditch retaining wall, effectively solve in the test process groundwater leak into the foundation ditch along the seam between organic glass foundation ditch barricade and the box lateral wall and lead to the problem of simulation distortion on the one hand, ensure to only take place along the seepage flow of organic glass foundation ditch barricade downside to truly reappear foundation ditch precipitation seepage flow process, on the other hand can realize the free deformation of organic glass foundation ditch barricade, realize the true reappearance to foundation ditch precipitation in-process retaining wall deformation.
Drawings
Fig. 1 is a top view of an embodiment of the present invention.
Fig. 2 is a front view of an embodiment of the present invention.
Fig. 3 is a rear view of an embodiment of the present invention.
Fig. 4 is a section 1-1 of an embodiment of the present invention.
Fig. 5 is a schematic view of a perforated steel plate according to an embodiment of the present invention.
Fig. 6 is a schematic view of water level and soil sample in the precipitation test of the embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to fig. 1, 2, 3 and 4, the indoor model test system for simulating seepage of a foundation pit precipitation plane and deformation of a retaining wall of the embodiment comprises a model box 1; the mold box 1 is a narrow-strip-shaped box body (in the embodiment, the length is 2.4m, the width is 0.5m, and the height is 1.2m) with an opening at the upper end, the organic glass plate 5 is arranged at the front of the mold box 1, the steel plate 6 is arranged at the back of the mold box, and the left side surface, the right side surface and the bottom surface are also made of steel plates. A transverse partition plate 2 which is as high as the model box 1 is arranged in the model box 1, and the model box 1 is divided into a soil box 3 and a water box 4 by the transverse partition plate 2. Referring to fig. 5, the transverse partition 2 is a perforated steel plate; the opening depth range of the opening steel plate and the depth range of soil in the soil box 3 are both 1m from the box bottom, the opening rate is greater than the porosity of the soil in the soil box 3, and the opening area is less than 60% of the area of the steel plate before opening. Referring to fig. 2, two layers of permeable geotextiles 14 are laid on one side (left side) of the soil box 3 of the transverse partition board 2 to prevent soil in the soil box 3 from permeating into the water tank 4 to cause soil loss in the test process. The soil box 3 is filled with a test soil body, and a movable transverse foundation pit retaining wall 7 is arranged in the soil box 3; the foundation pit retaining wall 7 is made of organic glass; the width of the organic glass foundation pit retaining wall 7 is 0.5-1cm smaller than the net width of the soil box 3, and the thickness and the length are determined according to a similar theory and a 1:50 reduced scale according to the size of the prototype foundation pit retaining wall (in the embodiment, the width of the organic glass foundation pit retaining wall is 0.45m, the buried depth is 0.7m, and the thickness is 1 cm); the top of the organic glass foundation pit retaining wall 7 is 5cm higher than the surface of the soil body in the soil box 3 so as to facilitate the arrangement of the displacement sensor 11. Referring to fig. 1, a foundation pit retaining wall 7 is connected with the front and rear walls (i.e., the organic glass plate 5 and the steel plate 6) of the soil box 3 by a telescopic water stop film 8, and forms a foundation pit model 18 with the outer side edges (i.e., the organic glass plate 5, the steel plate 6 and the left side edge steel plate 17 in fig. 1) of the soil box 3; the telescopic water stop film 8 is made of polyethylene materials, the length of the telescopic water stop film is the same as the depth of a soil body embedded into the soil box 3 of the organic glass foundation pit retaining wall 7, and the width of the telescopic water stop film is 1/3-1/2 of the length of the telescopic water stop film; the telescopic water stop film 8 is folded in the width direction to reserve free telescopic amount which is not less than 1/3 times of the width of the telescopic water stop film, one side of the telescopic water stop film is bonded with the side wall of the soil box 3, the other side of the telescopic water stop film is bonded with the organic glass foundation pit retaining wall 7, and the bonding width of the two sides of the telescopic water stop film is not less than 1/4 of the width of the telescopic water stop film; the setting of flexible stagnant water membrane 8 makes organic glass foundation ditch barricade 7 both can free motion and prevented simultaneously that organic glass foundation ditch barricade 7 both sides from oozing water. Referring to the figures 1, 2, 3 and 4, the width of a foundation pit model 18 is determined according to the size of a prototype foundation pit by a scale of 1:50-1:25, a precipitation well pipe 9, an in-pit observation well pipe 16 and an out-pit observation well pipe 19 are arranged in a soil box, the two pipes are made of PVC materials, holes are formed along the whole length of a pipe body, the hole sites are arranged in a quincunx shape, the diameter of each hole is 5-8 mm, the hole intervals are 3-5 cm, and the diameter and the buried soil depth of each hole and the buried soil depth are determined according to the similar theory according to the size of the prototype precipitation well pipe and the observation well pipe by a scale of 1; the PVC precipitation well pipe 9, the in-pit observation well pipe 16 and the out-pit observation well pipe 19 are wrapped with two layers of permeable geotextile, the permeable geotextile is wound on the well pipe by iron wires and fixed, and the iron wires are arranged at intervals of 10-15cm along the length direction of the well pipe. The distance between the precipitation well pipe 9 and the short side end of the in-pit observation well pipe 16 and the model box 1 is half of the width of the foundation pit model 18, the in-pit observation well pipe 16 is positioned in the middle of the precipitation well pipe 9, namely, the precipitation well pipe 9 and the in-pit observation well pipe 16 are arranged at equal intervals along the width direction of the foundation pit retaining wall 7, and 2-4 out-pit observation well pipes 19 are uniformly arranged in the middle of the outer part of the foundation pit model 18 along the direction far away from the foundation pit model 18. A water pipe connected with the micro water pump 10 is arranged in the precipitation well pipe 9, the simulation of the foundation pit precipitation process can be realized by starting the micro water pump 10, and a water alarm connected with a flexible rule with scales is inserted into the pit internal observation well pipe 16 and the pit external observation well pipe 19 during the experiment to acquire the dynamic water level in the pit; a plurality of displacement sensors 11, water pressure sensors 12 and soil pressure sensors 13 are arranged in the soil box 3 to monitor seepage inside and outside the foundation pit and retaining wall stress and deformation caused by seepage in the test process, wherein 3-5 groups of water pressure sensors 12 and soil pressure sensors 13 are uniformly arranged in the middle of two side walls of the organic glass foundation pit retaining wall 7 along the depth direction, and 2-3 sections of water pressure sensors 12 are uniformly arranged in the middle of the foundation pit model 18 at different embedded depth positions of the external soil body of the foundation pit model along the direction far away from the organic glass foundation pit retaining wall 7. The water tank 4 begins to evenly open holes every 0.1m in the middle along the depth direction at a position 0.1m away from the top of the water tank 4 on any steel plate side wall of the water tank 4, and a household water inlet tap 15 and a household water drainage tap 20 are installed at hole positions, wherein the water inlet tap 15 is used for water inlet, the water drainage tap 20 is used for water drainage, according to experimental requirements, when the water level in the water tank 4 is higher than the position of the designated water drainage tap 20, the designated water drainage tap 20 is opened for water drainage, the water level in the water tank 4 is accurately controlled to be highly stabilized at the position of the designated water drainage tap 20, stable constant head boundary conditions are provided for foundation pit plane seepage, and water in the water tank 4 can flow into the soil tank 3 through the transverse partition plate 2. As can also be seen from fig. 2, 3 and 6, the displacement sensor 11, the water pressure sensor 12 and the soil pressure sensor 13 are connected with the acquisition instrument 21; a flow meter 22 is connected to a water pipe connected with the micro water pump 10, and the flow meter 22 is connected with a recorder 23; the acquisition instrument 21 and the recording instrument 23 are connected to a computer 24.
As shown in fig. 6, as a preferred embodiment of the present invention, the seepage and the deformation of the retaining wall are simulated on the precipitation plane of the foundation pit (taking the precipitation test before excavation as an example). Compare with the conventional test case, the utility model discloses both simplify three-dimensional seepage flow into two-dimentional seepage flow to same scientific research demand is realized to less consumption, has ensured again only to take place along the seepage flow of barricade downside, and has realized the simulation of barricade deformation.
Claims (10)
1. An indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation comprises a model box; the method is characterized in that: the model box is a narrow-strip-shaped box body with an opening at the upper end, a transverse partition plate with the same height as the model box is arranged in the model box, a hole is formed in the transverse partition plate, and the model box is divided into a soil box and a water box by the transverse partition plate; the soil box is filled with a test soil body, and a movable transverse foundation pit retaining wall is arranged in the soil box; the foundation pit retaining wall is connected with the front tank wall and the rear tank wall of the soil box by adopting telescopic water stop films, and forms a foundation pit model with the outer side edge of the soil box; a precipitation well pipe is arranged in the foundation pit model, and a water pipe connected with a micro water pump is arranged in the precipitation well pipe; 2-4 observation well pipes are arranged in the soil box, and a water alarm connected with a flexible rule with scales is explored into the observation well pipes during experiments to acquire dynamic water level in the wells; a plurality of displacement sensors, a water pressure sensor and a soil pressure sensor are arranged in the soil box to monitor the internal and external seepage of the foundation pit and the deformation of the retaining wall in the test process; water contained in the water tank can flow into the soil box through the transverse partition plate so as to realize simulation of seepage of the plane of the foundation pit.
2. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the front surface of the model box is an organic glass plate, and the back surface, the left side surface, the right side surface and the bottom surface of the model box are steel plates.
3. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the transverse partition plate is a perforated steel plate; the opening depth range of the opening steel plate is the depth range of soil in the soil box, the opening rate is greater than the porosity of the soil in the soil box, and the opening area is less than 60% of the area of the steel plate before opening; two layers of permeable geotextiles are laid on one side of the perforated steel plate, which is positioned on the soil box.
4. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the width of the foundation pit model is determined according to the size of the prototype foundation pit by a scale of 1:50-1: 25; the foundation pit retaining wall is made of organic glass; the width of the organic glass foundation pit retaining wall is 0.5-1cm smaller than the net width of the soil box, and the thickness and the length are determined according to a similar theory and a reduced scale of 1:50-1:25 according to the size of the original foundation pit retaining wall; the top of the organic glass foundation pit retaining wall is 5-10cm higher than the surface of the soil body in the soil box.
5. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 4, wherein: the telescopic water stop film is made of polyethylene materials, the length of the telescopic water stop film is the same as the depth of a soil body embedded into the soil box of the organic glass foundation pit retaining wall, and the width of the telescopic water stop film is 1/3-1/2 of the length of the organic glass foundation pit retaining wall; the flexible stagnant water membrane is folding in order to reserve the free flexible volume that is no less than 1/3 times flexible stagnant water membrane width at width direction, and its one side bonds with the lateral wall of soil box, and the opposite side bonds with organic glass foundation ditch barricade, and both sides bond width is no less than 1/4 of flexible stagnant water membrane width.
6. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the precipitation well pipe and the observation well pipe are both made of PVC materials, holes are formed along the whole length of the pipe body, the hole sites are arranged in a quincunx shape, the diameter of each hole is 5-8 mm, and the hole distance is 3-5 cm; the diameters of the precipitation well pipe and the observation well pipe and the depth of the buried soil body are determined according to the similar theory and the sizes of the prototype precipitation well pipe and the observation well pipe according to the reduced scale of 1:50-1: 25; the tops of the precipitation well pipe and the observation well pipe are 5-10cm higher than the surface of the soil body in the soil box; two layers of permeable geotextile are wrapped outside the PVC precipitation well pipe and the observation well pipe, the permeable geotextile is wound on the well pipe by iron wires and fixed, and the iron wires are arranged at intervals of 10-15cm along the length direction of the well pipe.
7. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the precipitation well pipe is positioned in the middle of the foundation pit model in the width direction; an observation well pipe in the foundation pit model is positioned in the middle of the dewatering well pipe; and 2-4 observation well pipes are uniformly arranged outside the foundation pit model in the middle along the direction far away from the foundation pit model.
8. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the displacement sensor is arranged at a picking-out section of the foundation pit retaining wall extending out of the surface of the soil body; the water pressure sensors and the soil pressure sensors are arranged on two sides of the foundation pit retaining wall, wherein 3-5 groups of water pressure sensors and soil pressure sensors are uniformly arranged in the middle of the two side walls of the foundation pit retaining wall along the depth direction, and 2-3 cross-section water pressure sensors are uniformly arranged in the middle of the foundation pit model at different buried depth positions of the soil body outside the foundation pit model along the direction far away from the foundation pit retaining wall.
9. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the water tank is provided with holes uniformly arranged in the center along the depth direction on any steel plate side wall, the distance between the holes is 0.1-0.3m, and a household faucet is arranged at a hole position.
10. The indoor model test system for simulating foundation pit dewatering plane seepage and retaining wall deformation according to claim 1, is characterized in that: the displacement sensor and the water and soil pressure sensor are connected with an acquisition instrument; the water pipe connected with the micro water pump is connected with a flowmeter, and the flowmeter is connected with a recorder; the acquisition instrument and the recording instrument are connected to a computer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113358531A (en) * | 2021-06-28 | 2021-09-07 | 重庆大学 | Transparent soil model test device for simulating influence of underground retaining wall structure on groundwater seepage and test method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113358531A (en) * | 2021-06-28 | 2021-09-07 | 重庆大学 | Transparent soil model test device for simulating influence of underground retaining wall structure on groundwater seepage and test method thereof |
| CN113358531B (en) * | 2021-06-28 | 2024-03-12 | 重庆大学 | Transparent soil model test device and method for simulating influence of underground retaining wall structure on groundwater seepage |
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