Model test device for simulating underground water seepage
By designing a model test device for simulating groundwater seepage, the problem that the prior art is difficult to simulate the erosion effect of groundwater on energy piles is solved, and the test basis for the stress characteristics and heat transfer efficiency of energy piles under groundwater level conditions is provided. Ensure the stability and efficient operation of the energy pile system.
Patent Information
- Application Number
- CN202420729823.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-09
AI Technical Summary
The prior art is difficult to accurately simulate the erosion effect of groundwater on energy piles, especially during long-term erosion, which affects the stability and heat transfer efficiency of energy piles.
A model test device including model grooves, baffles, model piles, water inlet pipes and water outlets was designed. By burying water inlet pipes and setting water outlets in the ground body, the ground water flow erodes the energy piles, and relevant data were obtained. to understand its stress characteristics and heat transfer efficiency.
The device can effectively simulate the erosion effect of groundwater on energy piles, provide important experimental basis, and help ensure the safe operation of energy pile systems and improve heat transfer efficiency.
Smart Images
Figure CN222280629U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of geotechnical model tests, in particular to a model test device for simulating groundwater seepage. Background Art
[0002] With the continuous development of geothermal energy utilization technology, energy piles have attracted widespread attention as an efficient way of energy collection and storage. Energy piles provide heating or other forms of thermal energy by going deep underground and contacting geothermal resources. However, during the construction of energy piles, since they need to go deep underground and groundwater seepage is common, the seepage of groundwater will change the heat exchange mode between the energy pile and the surrounding medium from the original heat conduction to a composite heat exchange including heat conduction and convection, thereby affecting the stability and heat transfer efficiency of the energy pile. Therefore, studying the flushing effect of groundwater on energy piles is of great significance to ensure the safe operation of the energy pile system.
[0003] In the prior art, the research on energy piles mainly focuses on their heat exchange efficiency, mechanical properties and interaction with the surrounding soil, while there are few simulation studies on the scouring effect of groundwater on energy piles. Traditional geological model tests often cannot accurately reproduce the impact of groundwater flow on energy piles, and it is difficult to simulate long-term scouring processes. Therefore, in order to solve the above problems, it is necessary to develop a model test device that can effectively simulate the scouring effect of groundwater on energy piles. Utility Model Content
[0004] In view of the above problems, the utility model provides a model test device for simulating groundwater seepage, which can overcome the above problems or at least partially solve the above problems, and can simulate the scouring process of groundwater flow on energy piles, providing important test basis for the stress characteristics and heat transfer efficiency of energy piles under groundwater level conditions.
[0005] Specifically, the utility model provides a model test device for simulating groundwater seepage, comprising:
[0006] A model trough, wherein the model trough is filled with soil, and a water outlet communicating with the inner and outer spaces of the model trough is provided on both the left and right side walls of the model trough;
[0007] A baffle, the baffle being hinged on the outer surface of the model tank and located at the water outlet; the baffle being used to open or close the water outlet;
[0008] Model piles, the model piles are vertically arranged in the soil;
[0009] A water inlet pipe is buried in the soil, one end of which extends out of the soil for communicating with a water pump; a water inlet is provided on the pipe section of the water inlet pipe located in the soil.
[0010] Optionally, at least two water outlets are respectively arranged on the left and right side walls of the model tank, and the water outlets on the same side wall are arranged at intervals along the vertical direction.
[0011] Optionally, there are multiple water inlet pipes, and the multiple water inlet pipes are evenly arranged in the model tank; each of the water inlet pipes is connected to one of the water pumps respectively.
[0012] Optionally, a filter body is embedded in the water outlet, and the filter body is used to filter soil particles in the water flow.
[0013] Optionally, the soil body includes a first seepage layer and a second seepage layer arranged from bottom to top, the porosity of the first seepage layer is greater than the porosity of the second seepage layer; the bottom end of the model pile is located in the first seepage layer, and the water inlet pipe extends into the first seepage layer.
[0014] Optionally, the model test device further comprises a temperature sensor, and the temperature sensor is fixedly connected to the model pile.
[0015] Optionally, the model test device further comprises a plurality of fixing rods, which are arranged at intervals along the axial direction of the model pile; each of the fixing rods extends along the radial direction of the model pile, and a plurality of the temperature sensors are arranged at intervals on each of the fixing rods.
[0016] Optionally, there are multiple model piles, and the multiple model piles are evenly and spaced apart.
[0017] The model pile includes at least one energy pile and at least one conventional pile; the energy pile includes a pile body and a heat exchange tube, and the fixing rod is arranged on the pile body; the heat exchange tube includes a U-shaped pipe section, a water inlet section and a water outlet section, the U-shaped pipe section is pre-buried in the pile body, and the two ends of the U-shaped pipe section are respectively connected to the water inlet section and the water outlet section.
[0018] Optionally, the model testing device further comprises a cap, and the cap is arranged at the top of the model pile.
[0019] Optionally, the model testing device further comprises a plurality of dial indicators, each of which is arranged on the top of one of the model piles and is used to detect settlement information of the model pile.
[0020] The beneficial effects of the utility model are:
[0021] In the model test device provided by the utility model, since a water inlet pipe is buried in the ground and a water outlet is arranged on the model box, when conducting a model test, water is added into the model box through the water inlet pipe, and a water flow is formed between the water inlet and the water outlet to simulate the process of flushing the model tank, so as to obtain relevant data such as the settlement and temperature change of the energy pile caused by the flushing of the energy pile by groundwater during the flushing process, thereby understanding the influence of groundwater on the thermodynamic characteristics of the energy pile, and providing important test basis for the stress characteristics and heat transfer efficiency of the energy pile under the groundwater level condition.
[0022] Furthermore, at least two water outlets are respectively arranged on the left and right side walls of the model tank, and the water outlets on the same side wall are arranged at intervals in the vertical direction. In this way, during the test, only the baffle at one water outlet is opened, so that the water outlet connects the inner and outer spaces of the model tank. Since the position of the water inlet is fixed, by opening the water outlets at different heights, water flows in different directions in the vertical direction can be formed, thereby improving the simulation effect of the simulation experiment.
[0023] Furthermore, there are multiple water inlet pipes, which are evenly arranged in the model tank; each water inlet pipe is connected to a water pump. That is to say, each water pump controls the water flow in one water inlet pipe. During the test, only one water pump is started, and a water flow from the water inlet of the water inlet pipe connected to the water pump to a water outlet can be formed in the model box. Since the water inlet pipes are evenly distributed in the model tank, by starting the water pumps connected to the water inlet pipes at different positions, water flows in different directions in the horizontal direction can be formed, further improving the simulation effect of the simulation experiment.
[0024] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:
[0026] Figure 1 is a schematic perspective view of a model test device according to an embodiment of the utility model;
[0027] Figure 2 is a schematic partial perspective view of a model test device according to an embodiment of the utility model;
[0028] Figure 3 It is a schematic partial cross-sectional structural diagram of a model test device according to an embodiment of the utility model.
[0029] In the figure: 100, model trough, 110, water outlet, 200, baffle, 300, model pile, 310, energy pile, 311, pile body, 312, U-shaped pipe section, 313, water inlet section, 314, water outlet section, 320, conventional pile, 400, water inlet pipe, 410, water inlet, 500, soil body, 510, first seepage layer, 520, second seepage layer, 600, temperature sensor, 700, fixing rod, 800, foundation, 900, dial indicator. DETAILED DESCRIPTION
[0030] In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.
[0031] Unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.
[0032] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0033] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0034] Figure 1 is a schematic perspective view of a model test device according to an embodiment of the utility model, as shown Figure 1 As shown, and refer to Figures 2 to 3 The embodiment of the utility model provides a model test device for simulating groundwater seepage, comprising a model trough 100, a baffle 200, a model pile 300 and a water inlet pipe 400. The model trough 100 is filled with soil 500, and water outlets 110 communicating with the inner and outer spaces of the model trough 100 are provided on the left and right side walls of the model trough 100. The baffle 200 is hinged on the outer surface of the model trough 100 and is located at the position of the water outlet 110; the baffle 200 is used to open or close the water outlet 110. The model pile 300 is vertically arranged in the soil 500. The water inlet pipe 400 is buried in the soil 500, and one end of the water inlet pipe 400 extends out of the soil 500 for communicating with a water pump; a water inlet 410 is provided on the pipe section of the water inlet pipe 400 located in the soil 500.
[0035] In the embodiment of the utility model, since a water inlet pipe 400 is buried in the ground and a water outlet 110 is provided on the model box, when conducting a model test, water is added to the model box through the water inlet pipe 400 to form a water flow between the water inlet 410 and the water outlet 110 to simulate the process of flushing the model trough 100 (including the energy pile 310 and the conventional pile 320), so as to obtain relevant data such as the settlement and temperature change of the energy pile 310 caused by the flushing of the energy pile 310 by groundwater during the flushing process, and then understand the influence of groundwater on the thermodynamic characteristics of the energy pile 310, and provide important experimental basis for the stress characteristics and heat transfer efficiency of the energy pile 310 under the groundwater level condition.
[0036] In some embodiments of the utility model, at least two water outlets 110 are respectively arranged on the left and right side walls of the model tank 100, and the water outlets 110 on the same side wall are arranged at intervals in the vertical direction. In this way, during the test, only the baffle 200 at one water outlet 110 is opened, so that the water outlet 110 connects the inner and outer spaces of the model tank 100. Since the position of the water inlet 410 is fixed, by opening the water outlets 110 at different heights, water flows in different directions in the vertical direction can be formed, thereby improving the simulation effect of the simulation experiment.
[0037] In some embodiments of the utility model, there are multiple water inlet pipes 400, and the multiple water inlet pipes 400 are evenly arranged in the model tank 100; each water inlet pipe 400 is connected to a water pump. In other words, each water pump controls the water flow in a water inlet pipe 400. During the test, only one water pump is started, and a water flow from the water inlet 410 of the water inlet pipe 400 connected to the water pump to a water outlet 110 can be formed in the model box. Since the water inlet pipes 400 are evenly distributed in the model tank 100, by starting the water pumps connected to the water inlet pipes 400 at different positions, water flows with different directions in the horizontal direction can be formed, further improving the simulation effect of the simulation experiment. Similarly, multiple water pumps can also be started at the same time to adjust the flow direction of the water flow.
[0038] Specifically, there are four water inlet pipes 400. The model tank 100 is a cubic structure; each water inlet pipe 400 is arranged at a corner position of the model tank 100. Each water inlet 410 is connected to a conduit to guide the direction of water flow.
[0039] In some embodiments of the utility model, a filter body is embedded in the water outlet 110, and the filter body is connected to the side wall of the model tank 100. The filter body is used to filter soil particles in the water flow to avoid sand and soil loss, which affects the simulation effect of the simulation experiment.
[0040] Specifically, the soil body 500 includes a first seepage layer 510 and a second seepage layer 520 arranged from bottom to top, and the porosity of the first seepage layer 510 is greater than the porosity of the second seepage layer 520; the bottom end of the model pile 300 is located in the first seepage layer 510, and the water inlet pipe 400 extends into the first seepage layer 510. The first seepage layer 510 is sand with low water content and high porosity, and the second seepage layer 520 is soil in the test area.
[0041] In some embodiments of the utility model, in order to monitor the temperature changes in the model pile 300 and the surrounding soil 500 in real time, the model test device also includes a temperature sensor 600, and the temperature sensor 600 is fixedly connected to the model pile 300. In the prior art, when the model groove 100 is filled with soil to a preset position, the temperature sensor 600 is buried in the soil 500, and the filling and compaction are continued. Since the filling, vibration compaction and water flow scouring process in the model groove 100 will affect the position of the pre-buried temperature sensor 600 to a certain extent, thereby affecting the accuracy of the simulation experiment. The present application fixes the temperature sensor 600 to the model pile 300, reduces the influence on the position of the temperature sensor 600 during the filling, vibration compaction and water flow scouring process in the model groove 100, and improves the accuracy of the simulation experiment.
[0042] Furthermore, if Figure 3As shown, the model test device further includes a plurality of fixing rods 700, which are arranged at intervals along the axial direction of the model pile 300; each fixing rod 700 extends along the radial direction of the model pile 300, and each fixing rod 700 is provided with a plurality of temperature sensors 600 at intervals. The distance between each temperature sensor 600 and the model pile 300 is set according to actual needs.
[0043] like Figure 2 , Figure 3 As shown, in some embodiments of the utility model, the number of model piles 300 is multiple, and the multiple model piles 300 are evenly and spaced apart. The model test device also includes a cap 800, which is arranged at the top of the model pile 300 to bear and distribute the load of the upper structure. Further, the model pile 300 includes at least one energy pile 310 and at least one conventional pile 320; the energy pile 310 includes a pile body 311 and a heat exchange tube, and a fixing rod 700 is arranged on the pile body 311; the heat exchange tube includes a U-shaped pipe section 312, a water inlet section 313 and a water outlet section 314, the U-shaped pipe section 312 is pre-buried in the pile body, and the two ends of the U-shaped pipe section 312 are respectively connected to the water inlet section 313 and the water outlet section 314.
[0044] It should be noted that the conventional pile 320 in the embodiment of the utility model is a pile body (such as a slab foundation, a wall foundation, a pile foundation) of a building in the prior art. In the embodiment of the utility model, the cap 800 is used to connect the model piles 300 so that the force on the single pile is more uniform. In addition, the energy pile 310 is used for building support on the one hand, and for obtaining shallow geothermal energy from the stratum on the other hand, thereby realizing heating and cooling of the building. The conventional pile 320 is mainly used for building support.
[0045] In some embodiments of the present invention, the model test device further includes a plurality of dial indicators 900 , each of which is disposed on the top of a model pile 300 and is used to detect displacement information of the model pile 300 , including but not limited to settlement information of the model pile 300 and the soil 500 .
[0046] So far, the technical solution of the utility model has been described in combination with the above multiple embodiments, but it is easy for those skilled in the art to understand that the protection scope of the utility model is not limited to these specific embodiments. Without departing from the technical principle of the utility model, those skilled in the art can split and combine the technical solutions in the above embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principle of the utility model will fall within the protection scope of the utility model.
Claims
1. A model test device for simulating groundwater seepage, characterized in that: include: A model trough, wherein the model trough is filled with soil, and water outlets communicating with the inner and outer spaces of the model trough are provided on the left and right side walls of the model trough; A baffle, the baffle being hinged on the outer surface of the model tank and located at the water outlet; the baffle being used to open or close the water outlet; Model piles, the model piles are vertically arranged in the soil; A water inlet pipe is buried in the soil, one end of which extends out of the soil for communicating with a water pump; a water inlet is provided on the pipe section of the water inlet pipe located in the soil.
2. The model test device according to claim 1, characterized in that: At least two water outlets are respectively arranged on the left and right side walls of the model tank, and the water outlets on the same side wall are arranged at intervals along the vertical direction.
3. The model test device according to claim 1, characterized in that: There are multiple water inlet pipes, and the multiple water inlet pipes are evenly arranged in the model tank; each of the water inlet pipes is connected to one of the water pumps respectively.
4. The model test device according to claim 1, characterized in that: A filter body is embedded in the water outlet, and the filter body is used to filter soil particles in the water flow.
5. The model test device according to claim 1, characterized in that: The soil body includes a first seepage layer and a second seepage layer arranged from bottom to top, the porosity of the first seepage layer is greater than the porosity of the second seepage layer; the bottom end of the model pile is located in the first seepage layer, and the water inlet pipe extends into the first seepage layer.
6. The model test device according to claim 1, characterized in that: The model test device also includes a temperature sensor, and the temperature sensor is fixedly connected to the model pile.
7. The model test device according to claim 6, characterized in that: The model test device further comprises a plurality of fixing rods, which are arranged at intervals along the axial direction of the model pile; each of the fixing rods extends along the radial direction of the model pile, and a plurality of the temperature sensors are arranged at intervals on each of the fixing rods.
8. The model test device according to claim 7, characterized in that: The number of the model piles is multiple, and the multiple model piles are evenly and spaced apart; The model pile includes at least one energy pile and at least one conventional pile; the energy pile includes a pile body and a heat exchange tube, and the fixing rod is arranged on the pile body; the heat exchange tube includes a U-shaped pipe section, a water inlet section and a water outlet section, the U-shaped pipe section is pre-buried in the pile body, and the two ends of the U-shaped pipe section are respectively connected to the water inlet section and the water outlet section.
9. The model test device according to claim 1, characterized in that: The model testing device also includes a cap, which is arranged on the top of the model pile.
10. The model test device according to claim 9, characterized in that: The model test device also includes a plurality of dial indicators, each of which is arranged on the top of one of the model piles and is used to detect the settlement information of the model pile.