A test device for soil moistening

Abstract

The embodiment of the application provides a test device for soil moistening, comprising: a ring-shaped table having a central axis; a mounting base arranged in the ring-shaped table and coaxial with the ring-shaped table; a guide cylinder fixedly connected to the mounting base; a floating rod having a central cavity structure extending along an axial direction and movably connected to the guide cylinder through an opening at a lower end of the guide cylinder; a driving assembly configured to drive the floating rod to move axially relative to the guide cylinder; and a water inlet pipe entering the guide cylinder through an opening at an upper end of the guide cylinder and communicating with the central cavity structure of the floating rod. A mounting rod extending along the axial direction is connected to a lower end of the floating rod, a cavity structure communicating with the central cavity structure of the floating rod is arranged in the mounting rod, and a plurality of wetting pipes for water outlet and communicating with the cavity structure are densely arranged on the mounting rod. The test device provided by the embodiment of the application can be quickly plugged and unplugged, can uniformly wet the soil, and can improve the efficiency of soil moistening.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation treatment, in particular to a test device for soil moistening. BACKGROUND

[0002] Collapsible loess refers to soil that undergoes significant additional deformation due to structural damage after being soaked under the action of overlying soil self-weight stress or the combined action of self-weight stress and additional stress. Thick collapsible loess is collapsible loess with a relatively thick thickness formed due to the influence of the accumulation environment, geographical location, geology and climate conditions in different regions. It will undergo significant subsidence after being soaked.

[0003] 1. Currently, the collapsible loess foundation with a large thickness is generally treated by lime-soil compaction pile. According to the requirements of the technical regulation for foundation treatment of railway engineering, the soil of the foundation should be close to the optimum water content or the plastic limit when the lime-soil compaction pile is formed. When the water content of the soil is less than 12%, the soil layer in the range to be treated should be moistened to reach the optimum water content to ensure the pile-forming effect of the lime-soil compaction pile.

[0004] 2. Currently, the moistening of collapsible loess sites is mainly achieved by a certain number and depth of water infiltration holes, which uniformly immerse water into the soil layer within the range of the depth to be treated. However, there are problems of uneven water infiltration during the moistening process of the site using water infiltration holes. In addition, the problems of the spacing between water injection holes, the depth of the spacing between holes and the diffusion area, the correlation between the water injection time and the spacing between water injection holes, the uniformity of infiltration, and the like are relatively complex. There are problems of difficult water quantity control during the water infiltration process, high cost, and low moistening efficiency.

[0005] 3. The invention patent with the patent number CN112858633A accelerates the moistening efficiency by setting a plurality of support moistening assembly devices. However, after the loess is soaked, the viscosity of the loess makes it difficult to pull out. During the monitoring process, the collapsed loess causes the test device to tilt to different degrees, which further leads to inaccurate test data measured subsequently. SUMMARY

[0006] To solve one of the above technical defects, a test device for soil moistening is provided in the embodiments of the present application. To achieve the above purpose, the present application provides the following technical solutions:

[0007] A test device for soil moistening, comprising:

[0008] A ring-shaped table having a central axis;

[0009] A mounting base arranged in the ring-shaped table;

[0010] A guide cylinder inserted into the mounting base;

[0011] The floating rod has a middle cavity structure extending along an axial direction and is movably inserted into the guide cylinder through an opening at a lower end of the guide cylinder;

[0012] The driving assembly drives the floating rod to move axially relative to the guide cylinder;

[0013] The water inlet pipe enters the guide cylinder through an opening at an upper end of the guide cylinder and communicates with the middle cavity structure of the floating rod;

[0014] The mounting rod is connected to a lower end of the floating rod, and a cavity structure communicating with the middle cavity structure is arranged inside the mounting rod, and a plurality of wetting pipes for water outlet and communicating with the cavity structure are densely arranged on the mounting rod.

[0015] The test device for soil moistening provided by the embodiment comprises a ring-shaped table, a mounting base, a guide cylinder, a floating rod, a driving assembly, a water inlet pipe and a mounting rod. The ring-shaped table has a middle axis. The mounting base is arranged in the ring-shaped table and coaxial with the ring-shaped table. The guide cylinder is movably inserted into the mounting base. The floating rod has a middle cavity structure extending along an axial direction and is movably inserted into the guide cylinder through an opening at a lower end of the guide cylinder. The driving assembly drives the floating rod to move axially relative to the guide cylinder. The water inlet pipe enters the guide cylinder through an opening at an upper end of the guide cylinder and communicates with the middle cavity structure of the floating rod. The lower end of the floating rod is connected to a mounting rod extending along an axial direction. A cavity structure communicating with the middle cavity structure is arranged inside the mounting rod, and a plurality of wetting pipes for water outlet and communicating with the cavity structure are densely arranged on the mounting rod. The test device for soil moistening provided by the embodiment can be quickly inserted and pulled out in the soil, can uniformly wet the soil, and improves the efficiency of soil moistening. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application. In the drawings:

[0017] Figure 1 The structure schematic view of the test device for soil moistening provided by the embodiment;

[0018] Figure 2 The structure schematic view of the test device for soil moistening provided by the embodiment;

[0019] Figure 3 The structure schematic view of the test device for soil moistening provided by the embodiment; Figure 2 The structure schematic view of the test device for soil moistening provided by the embodiment;

[0020] Figure 4 The structure schematic view of the test device for soil moistening provided by the embodiment;

[0021] The accompanying drawings are marked as follows:

[0022] 100-Bearing component; 101-Annular platform; 102-Support rod; 103-Hollow bracket; 200-Monitoring component; 201-Mounting base; 202-Guide cylinder; 203-Floating rod; 204-Mounting rod; 205-Wetting pipe; 206-High-density filter screen; 207-Water inlet pipe; 208-Linkage rack; 209-Hanging frame; 210-Concave platform; 211-Rotating gear; 212-Drive gear; 213-Drive motor; 214-Locking rod; 215-Contact sensing layer; 216-Balancing ball; 217-Suspension rope; 218-Controller; 219-Adjusting push rod; 220-Limit spring; 221-Top cylinder. Detailed Implementation

[0023] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0024] This invention discloses a test device for soil moistening, addressing the problems of uneven soil moistening through the seepage holes in existing devices and the difficulty in removing the device after it has been inserted into the soil for moistening. This test device can be applied to moistening loess sites, and is also suitable for moistening other types of soil. This embodiment uses a loess site as an example to provide a detailed description of the test device.

[0025] Please see Figures 1 to 4 An experimental device for soil moistening includes: a ring stage 101, a guide tube 202, a floating rod 203, a drive assembly, a water inlet pipe 207, and a mounting rod 204.

[0026] The annular stage 101, as a major component of the bearing assembly 100, has a ring-shaped structure, and its centerline serves as the central axis 100 of the test device. The monitoring assembly 200 includes a mounting base 201, which is located inside the annular stage 101 and is coaxial with the annular stage 101; the guide cylinder 202 is inserted and fixed inside the mounting base 201.

[0027] like Figure 1The floating rod 203 shown has an axially extending central cavity structure, which is movably inserted into the guide cylinder 202 through the lower opening of the guide cylinder 202. The drive assembly drives the floating rod 203 to move axially relative to the guide cylinder 202. The water inlet pipe 207 enters the guide cylinder 202 through the upper opening of the guide cylinder 202 and communicates with the central cavity structure of the floating rod 203. The cavity structure of the mounting rod 204 and the central cavity structure of the floating rod 203 both serve as flow channels, which communicate with the wetting pipe 205. The upper end of the water inlet pipe 207 extends through the perforated window between the top cylinder 221 and the guide cylinder 202 and the perforated window on the vertical wall of the perforated support 103.

[0028] like Figure 4 As shown, the lower end of the floating rod 203 is connected to the mounting rod 204 extending along the axial direction. The mounting rod 204 has a cavity structure that communicates with the through cavity structure in the floating rod 203. Several wetting pipes 205 for water discharge and communicating with the cavity structure are densely arranged on the mounting rod 204.

[0029] The technical solution provided in this embodiment includes a ring-shaped platform with a central axis; a mounting base 201 located within the ring-shaped platform 101 and coaxial with it; a guide cylinder 202 inserted and fixed within the mounting base 201; a floating rod 203 having an axially extending central cavity structure, movably inserted into the guide cylinder 202 via an opening at its lower end; a driving assembly driving the floating rod 203 to move axially relative to the guide cylinder 202; a water inlet pipe 207 entering the guide cylinder 202 via an opening at its upper end and communicating with the central cavity structure of the floating rod 203; a mounting rod 204 extending axially connected to the lower end of the floating rod 203, the mounting rod 204 having a cavity structure communicating with the central cavity structure, and several wettability pipes 205 densely arranged on the mounting rod 204 for water outlet and communicating with the cavity structure. The soil wetting test device provided in this embodiment can achieve rapid insertion and extraction within the soil, uniformly wetting the soil and improving the efficiency of soil wetting.

[0030] One embodiment is as follows: the soaking pipe 205 is inclined, with one end fixed to the mounting rod 204 and the other end extending in a direction away from the central axis. The soaking pipe 205 is inclined downwards, which allows for rapid and uniform soaking of the land and prevents subsided loess from entering the inner cavity of the soaking pipe 205, thus improving soaking efficiency.

[0031] Furthermore, the experimental apparatus also includes an isolation cylinder, which is fitted over the mounting rod 204. The upper end of the isolation cylinder is connected to the lower end of the floating rod 203. The vertical wall of the isolation cylinder is densely covered with holes from a high-density filter screen 206. The isolation cylinder facilitates the formation of a corresponding barrier area around the wetting pipe 205, further reducing the problem of loess clogging the wetting pipe 205. The wetting pipe 205 is located inside the high-density filter screen 206, and the top of the floating rod 203 is connected to an inlet pipe 207 that communicates with the flow channel.

[0032] This embodiment uses a uniformly inclined downward-facing wetting pipe 205 to quickly and evenly wet the land, improving the humidification efficiency. By laying a high-density filter screen, a corresponding barrier area is formed around the wetting pipe, further reducing the problem of loess clogging the wetting pipe without affecting the water output.

[0033] One embodiment: The test apparatus further includes a control and balance component, which includes a top cylinder 221 disposed above the guide cylinder 202. A perforated support 103 is fixed to the upper part of the annular platform 101, and the top cylinder 221 is disposed within the perforated support 103. A fixing ring is also fixed to the lower part of the annular platform, and support rods 102 are evenly connected to the bottom surface of the fixing ring. An inclined connecting rod is connected between the fixing ring and the guide cylinder, and several inclined connecting rods are evenly arranged around the guide cylinder.

[0034] A contact sensing layer 215 is installed on the inner wall of the top cylinder, and a balance sphere 216 is connected to the top surface of the hollow support 103 via a suspension rope 217. The balance sphere 216 is located within the space enclosed by the top cylinder. A controller 218 is fixed to the outer wall of the top cylinder, and the output terminal of the contact sensing layer 215 is electrically connected to the controller 218. Sensors in different directional sensing areas are connected to different control circuits. When the test device is tilted, the balance sphere 216 contacts the contact sensing layer 216 and conducts electricity, sending an electrical signal to the controller 218. Based on the different positions of the balance sphere in contact with the contact sensing area, the corresponding sensing signals of the corresponding zones are triggered, thereby controlling the test device to remain horizontal throughout the test, improving the accuracy of subsequent test data measurements.

[0035] One embodiment is as follows: A plurality of through holes are evenly distributed on the wall surface of the annular platform 101, extending radially. A cylinder is fixed on the outer wall surface of the annular platform 101 at the corresponding position of the through hole. The telescopic adjusting push rod 219 of the cylinder extends along the central axis through the through hole and is hinged to the mounting base 201 located in the middle. A limiting spring 220 is sleeved on the adjusting push rod 219. One end of the limiting spring 220 is fixed to the mounting base 201, and the limiting spring 220 is used to limit the travel of the adjusting push rod.

[0036] When the test device tilts, the balance ball 216 contacts the contact sensing area. Depending on the different positions of the ball in contact with the contact sensing area, the corresponding zone's sensing signal is triggered. Then, the cylinder controls the extension of the adjusting push rod 219, pushing the mounting base in the direction of balance. This ensures that the test device remains horizontal throughout the test, improving the accuracy of subsequent test data measurements.

[0037] like Figure 2 and Figure 3 As shown, after humidification is complete, the floating rod needs to be raised to reduce the difficulty of manual lifting. This lifting action is accomplished through the following structure:

[0038] The outer wall of the floating rod 203 is provided with a linkage rack 208 extending axially, and the guide cylinder 202 is provided with a notch extending axially, with the linkage rack 208 placed within the notch area; the drive assembly includes a rotating gear meshing with the linkage rack 208. By rotating the rotating gear, the floating rod is driven to move upward through the linkage rack.

[0039] One embodiment includes a drive assembly further comprising a suspension frame 209 fixed below the mounting base 201, the suspension frame 209 being located on the side of the notch away from the central axis, and a mounting window being provided on the suspension frame 209; a concave platform 210 is slidably connected within the mounting window, the concave platform 210 being movably mounted on the suspension frame 209. Specifically, slide rails engaging at both ends of the concave platform 210 allow the concave platform 210 to slide back and forth along the direction approaching and away from the central axis; a rotating gear 211 and a drive gear 212 meshing with the rotating gear are rotatably connected within the concave platform.

[0040] After humidification is completed, the concave platform 210 is pushed on the hanging frame 209, causing the rotating gear 211 to mesh with the linkage rack 208, which drives the floating rod to move up along the guide cylinder, thereby quickly pulling the entire installation rod out of the loess, reducing labor intensity.

[0041] The concave stage 210 is equipped with a drive motor 213, which drives a gear in conjunction with the drive motor 213. When the concave stage 210 is pushed to move closer to the central axis, the rotating gear meshes with the linkage rack 208.

[0042] Additionally, a protrusion is connected to the concave platform 210, and a pin hole is provided on the protrusion. A locking rod extending radially along the guide cylinder 202 passes through the pin hole and is then inserted into the lifting frame 209.

[0043] After humidification, the concave platform 210 is pushed in the hanging frame 209, so that the rotating gear 211 meshes with the linkage rack 208, driving the floating rod 203 to move upward along the guide cylinder 202, thereby quickly pulling the installation rod 204 out of the loess, reducing labor intensity. The end of the concave platform 210 is provided with an integrally formed protrusion, and a locking rod 214 is movably inserted through the protrusion. The end of the locking rod 214 has a T-shaped structure.

[0044] During monitoring, rotating and pulling out the locking rod 214 pulls the concave platform 210 backward, causing the rotating gear 211 to disengage from the linkage rack 208. This allows the floating rod 203 to monitor loess subsidence data through its own weight and the cooperation of the mounting rod 204. After monitoring, the concave platform 210 is moved and its position is fixed by the locking rod 214. The surface of the hanging frame 209 has a limiting groove that matches the locking rod 214.

[0045] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0046] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A test apparatus for soil moistening, characterized in that, include: A truncated ring with a central axis; The mounting base is located inside the annular truncated ring and is coaxial with the annular truncated ring. The guide tube is inserted into the mounting base; The floating rod has a central cavity structure that extends along the axis and is movably inserted into the guide cylinder through the lower end opening of the guide cylinder; The drive assembly drives the floating rod to move axially relative to the guide cylinder; The water inlet pipe enters the guide cylinder through the upper opening of the guide cylinder and is connected to the central cavity structure of the floating rod; An installation rod is connected to the lower end of the floating rod; the installation rod has a cavity structure that communicates with the central cavity structure, and several wettable pipes for water outlet and communicating with the cavity structure are densely arranged on the installation rod; the wettable pipes are inclined, with one end fixed to the installation rod and the other end extending in a direction away from the central axis. An isolation cylinder is fitted over the mounting rod. The upper end of the isolation cylinder is connected to the lower end of the floating rod. The vertical wall of the isolation cylinder is densely covered with holes covered by a high-density filter screen. A top cylinder is positioned above the guide cylinder; a hollow support is fixed to the upper part of the annular platform, and the top cylinder is positioned inside the hollow support; a contact sensing layer is provided on the inner wall of the top cylinder, and a balance ball is connected to the top surface of the hollow support by a suspension rope; The balancing sphere is located within the space enclosed by the top tube; A plurality of through holes are evenly distributed on the wall of the annular platform. The through holes extend radially. A cylinder is fixed on the outer wall of the annular platform at the position corresponding to the through hole. The telescopic adjustment push rod of the cylinder extends through the through hole towards the central axis and is hinged to the mounting base. A limit spring is sleeved on the adjustment push rod, and one end of the limit spring is fixed to the mounting base.

2. The experimental apparatus for soil moistening according to claim 1, characterized in that, The upper end of the water inlet pipe extends through a perforated window between the top cylinder and the guide cylinder, and through a perforated window on the vertical wall of the perforated support.

3. The experimental apparatus for soil moistening according to claim 1, characterized in that, The outer wall of the floating rod is provided with a linkage rack extending axially, and the guide cylinder is provided with a notch extending axially, with the linkage rack placed within the notch area; the drive assembly includes a rotating gear meshing with the linkage rack.

4. The experimental apparatus for soil moistening according to claim 3, characterized in that, The drive assembly also includes a hanging frame fixed below the mounting base, the hanging frame being located on the side of the notch away from the central axis, and an installation window being provided on the hanging frame; a concave platform is slidably connected inside the installation window, and slide rails at both ends of the concave platform allow the concave platform to slide back and forth along the direction approaching and away from the central axis; a rotating gear and a drive gear meshing with the rotating gear are rotatably connected inside the concave platform.

5. The experimental apparatus for soil moistening according to claim 4, characterized in that, The concave platform is equipped with a drive motor, which is linked to the drive gear. When the concave platform is pushed to move closer to the central axis, the rotating gear meshes with the linkage rack.

6. The experimental apparatus for soil moistening according to claim 5, characterized in that, The concave platform is connected to a protrusion, and a pin hole is provided on the protrusion. A locking rod passes through the pin hole and is movably inserted into the hanging frame. The insertion direction of the locking rod extends radially along the guide cylinder.

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