Device for monitoring volume weight of soil body in hydraulic reclamation process

Abstract

The device for monitoring the volume weight of the soil body in the hydraulic reclamation process comprises a base, the base is composed of a bottom plate and a supporting device, the supporting device is fixed to the bottom plate, and a plurality of soil pressure gauges are arranged on the supporting device at intervals. The supporting device comprises a main supporting rod and a plurality of branch supporting rods arranged on the main supporting rod. The main supporting rod is a rigid body pipe, and the branch supporting rods are connecting pipes. A drill bit is formed at one end of the rigid body pipe, vertically penetrates through the center of the bottom plate and is fixedly formed into a base of the monitoring device; a plurality of connecting pipes are arranged on the rigid pipe above the bottom plate at intervals, one end of each connecting pipe is fixed on the rigid pipe, and the other end of each connecting pipe is connected with and supports a soil pressure meter fixing device; and the soil pressure gauge is placed on the soil pressure gauge fixing device. The utility model further discloses a method for monitoring the volume weight of the soil body by using the device, and the problem that the volume weight of dredger fill is difficult to effectively sample and monitor in the dredger fill process by using the traditional process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical fields of water transportation, water conservancy, and geotechnical engineering, and relates to a device and method for monitoring the soil unit weight during the dredger filling process. Background Art

[0002] In coastal areas, the method of using dredged silt to form land and carry out soft foundation treatment to form construction land is widely used. The thickness of dredged silt is generally up to several meters or even more than ten meters. Affected by various factors such as the original topography, the layout of dredger filling pipes, and hydraulic sorting, the unit weights of the dredger fill at different positions and different depths are not the same. And the unit weight of the dredger fill has a great impact on the quality of subsequent foundation treatment. At present, the traditional method generally uses manual sampling to detect the unit weight of the dredger fill, which has problems such as low sampling efficiency, limited sampling positions and sampling depths, and it is difficult to obtain the unit weight data of the dredger fill on the site in a timely and effective manner. How to effectively monitor the unit weight of the dredger fill during the dredger filling process and ensure that the site meets the requirements of subsequent construction is a difficult point in the dredger filling construction. Content of the Utility Model

[0003] The purpose of the utility model is to provide a device for monitoring the soil unit weight during the dredger filling process, so as to overcome the above-mentioned disadvantages and deficiencies existing in the prior art.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A device for monitoring the soil unit weight during the dredger filling process includes a base, the base consists of a bottom plate and a support device, the support device is fixed on the bottom plate, and a number of earth pressure cells are arranged at intervals on the support device.

[0006] Optionally, the support device includes a main support rod and a number of sub-support rods arranged thereon.

[0007] Optionally, the main support rod is a rigid pipe, and the sub-support rods are connecting pipes; one end of the rigid pipe is formed into a drill bit, which vertically passes through the center of the bottom plate and is fixed to form the base of the monitoring device; on the rigid pipe above the bottom plate, a number of connecting pipes are arranged at intervals, one end of each connecting pipe is fixed to the rigid pipe, and the other end is connected to a fixing device for supporting the earth pressure cell; the earth pressure cell is placed on the fixing device for the earth pressure cell.

[0008] Optionally, a number of rib plates are evenly arranged around the rigid pipe below the bottom plate to strengthen the connection and fixation with the bottom plate.

[0009] Optionally, it further includes a wireless transmission device and a solar power supply system fixed to the other end of the rigid pipe opposite to the drill bit.

[0010] Optionally, the cable of the earth pressure gauge is connected to the data acquisition and wireless transmission device and the solar power supply system through the channels inside the connecting pipe and the channels inside the rigid pipe, receives power from the solar power supply system, and transmits the earth pressure gauge data during the hydraulic fill process outward through the wireless transmission device.

[0011] Optionally, four rib plates with uniform intervals are arranged around the rigid pipe to strengthen the connection and fixation with the bottom plate, and the four rib plates are evenly arranged around the rigid pipe at intervals of 90 degrees.

[0012] Optionally, the earth pressure gauge fixing device includes a round groove tray and fixing screws. The round groove tray is used to accommodate and place the earth pressure gauge, and several fixing screws are provided to strengthen the fixation of the earth pressure gauge through the holes on the round groove tray.

[0013] Optionally, three fixing screws are provided to strengthen the fixation of the earth pressure gauge at intervals of 120 degrees from each other on the circumference.

[0014] Optionally, the distances of the respective connecting pipes on the rigid pipe are equal; and / or, the earth pressure gauges are arranged at equal intervals in the vertical direction; and / or, in the radial direction, the respective connecting pipes are symmetrically distributed about the center of the rigid pipe; preferably, the distances of the respective connecting pipes on the rigid pipe are 1 m, and the earth pressure gauges are arranged at intervals of 1 m in the vertical direction; preferably, two connecting pipes are provided, which are respectively located at positions separated by 180° on the circumference; or four connecting pipes are provided, which are respectively located at opposite positions on the circumference.

[0015] Optionally, the bottom plate is square, and the support device passes through the geometric center of the square.

[0016] Optionally, the rigid pipe is made of steel pipe, the bottom plate is made of steel plate, and the steel pipe and the bottom plate are fixed by welding.

[0017] Optionally, the length of the steel pipe passing through the steel plate is greater than or equal to 50 cm.

[0018] For the method of monitoring the soil unit weight using the above device, a number of earth pressure gauges are arranged at intervals of 1 m in the vertical direction of the support device above the bottom plate. After the earth pressure gauges are placed on the round groove tray, the fixing screws are tightened for fixation. The cables of the earth pressure gauges are connected to the data acquisition device, and the unit weight of the corresponding hydraulic fill layer is calculated according to the monitoring data and the following formula:

[0019] Assume that earth pressure gauges numbered 1 to N are buried, and the calculation formula for the average unit weight of the hydraulic fill between any two earth pressure gauges A and B is as follows:

[0020]

[0021] γ—the average unit weight of the hydraulic fill between earth pressure gauges A and B, kN / m3

[0022] Vertical distance between the earth pressures of H—A and B, m

[0023] P1, P2—Vertical earth pressure values measured by the earth pressure gauges of A and B, kPa

[0024] The unit weight of the corresponding hydraulic fill layer calculated from the data of the earth pressure gauge during the hydraulic filling process is transmitted to the computer terminal through a wireless transmission device for monitoring.

[0025] The hydraulic fill body unit weight monitoring device and monitoring method provided by the present utility model have significant advantages and beneficial effects compared with the prior art, which are mainly reflected in the following aspects:

[0026] 1) Realize in-situ continuous monitoring of the unit weight of the hydraulic fill body

[0027] The unit weight of the hydraulic fill body is a key index for evaluating the quality of hydraulic filling. The traditional unit weight monitoring mainly adopts the methods of manual sampling and indoor testing, which have problems such as low monitoring frequency, poor timeliness, and insufficient representativeness. The present utility model uses an earth pressure gauge to in-situ measure the pressure change of the hydraulic fill body. Through reasonable layout and data analysis, it can realize continuous monitoring of the unit weight of the soil body during the whole hydraulic filling process, timely, accurately, and comprehensively reflect the true state of the hydraulic fill body, and provide a reliable basis for quality control;

[0028] 2) Improve the representativeness and reliability of monitoring data

[0029] The hydraulic fill body often has large spatial non-uniformity, and local sampling monitoring is difficult to reflect the variation law of the unit weight of the entire filling area. The present utility model adopts a support device composed of a rigid pipe and a connecting pipe, which realizes multi-point layout of the earth pressure gauges in the vertical and radial directions, can comprehensively collect the soil pressure data at different depths and different orientations, and through reasonable spatial interpolation and statistical analysis, more representative and reliable unit weight monitoring results can be obtained;

[0030] 3) Reduce the difficulty and cost of manual sampling

[0031] The hydraulic fill body usually has a high water content and low strength, making it difficult for manual sampling, with a large labor intensity, and the sampling process is prone to disturbing the soil body, affecting the accuracy of monitoring data. The present utility model uses a bit to press the monitoring device into the soil body, realizes indirect monitoring through an earth pressure gauge, avoids the difficulty of direct sampling, reduces the manual labor intensity and economic cost, and at the same time minimizes the disturbance to the soil body to ensure the reliability of monitoring data;

[0032] 4) Adapt to different hydraulic filling processes and filling materials

[0033] The technologies and filling materials used in hydraulic filling construction are diverse, and the variation characteristics of soil unit weight under different working conditions vary greatly. The monitoring device of the present utility model has a simple structure and flexible layout. By changing parameters such as the length of the support device, the number and position of connecting pipes, it can adapt to the monitoring requirements of different hydraulic filling technologies (such as secondary hydraulic filling, layered hydraulic filling, etc.) and filling materials (such as sandy soil, silty soil, silt, etc.), and has good applicability and versatility;

[0034] 5) Realize the automation and informatization of the monitoring process

[0035] For the traditional manual sampling and monitoring method, the on-site operation is cumbersome, the data processing efficiency is low, and it is difficult to achieve real-time feedback and dynamic control. The present utility model adopts an electrical soil pressure gauge, which can realize automatic reading and wireless transmission through a data collector, and combines computer software for data analysis and visual display, realizing the automation and informatization of the monitoring process, greatly improving the monitoring efficiency and management level, and providing timely and accurate decision-making support for hydraulic filling construction;

[0036] 6) Promote the quality improvement and technological progress of hydraulic filling projects

[0037] The dynamic monitoring of the unit weight of hydraulic filled soil is an important means to realize the refined management and quality control of hydraulic filling projects. The present utility model provides a scientific, reliable and efficient monitoring method and technical equipment for owners, supervisors, construction parties, etc., which helps to timely discover and solve quality hidden dangers in hydraulic filling construction, continuously optimize construction technologies and filling materials, promote the progress of hydraulic filling technologies and the healthy development of the industry, and improve the overall quality and service performance of hydraulic filling projects.

[0038] In summary, the device and method for monitoring the unit weight of hydraulic filled soil provided by the present utility model break through the limitations of traditional manual sampling monitoring, realize the in-situ continuous monitoring of the unit weight of soil during the whole process of hydraulic filling, improve the representativeness and reliability of monitoring data, reduce the difficulty and cost of manual sampling, adapt to the requirements of different hydraulic filling technologies and filling materials, realize the automation and informatization of the monitoring process, and solve the problem that it is difficult to effectively sample and monitor the unit weight of hydraulic filled soil in the traditional process during hydraulic filling. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following drawings are provided for display:

[0040] Figure 1 It is an elevation view of an embodiment of the present utility model.

[0041] Figure 2 It is Figure 1 the sectional view taken along line A-A of the shown embodiment.

[0042] Figure 3 It isFigure 1 Cross-sectional view taken along line B-B in the illustrated embodiment.

[0043] Figure 4 Partial enlarged view of the fixing device according to an embodiment of the present utility model.

[0044] Reference numerals in the figure: 1, steel pipe; 2, steel plate; 3, rib plate; 4, connecting pipe; 5, earth pressure gauge fixing device; 5-1, circular groove tray; 5-2, fixing screw; 6, earth pressure gauge; 7, data acquisition and wireless transmission device; 8, solar power supply system; 9, earth pressure gauge cable. Detailed implementation manners

[0045] In order to make the objectives, technical solutions and beneficial effects of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0046] For the sake of convenience of description, when necessary, spatial relative terms, such as "beneath", "below", "lower", "above", "upper", etc., will be used to describe the relationship of one element or feature shown in the drawings relative to another element or feature. The spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation shown in the figures. For example, if the device in the figure is flipped, an element described as "beneath" or "below" other elements or features will be oriented "above" the other elements or features.

[0047] Unless otherwise defined, the terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs, and the terms should be understood to have a meaning consistent with the meaning in the context of the related art, and should not be understood in an idealized or overly formalized manner, except where the present utility model is clearly defined.

[0048] Please refer to Figures 1 to 4 , a device for monitoring the soil bulk density during hydraulic filling of the present utility model, comprising a steel pipe 1, a steel plate 2, a rib plate 3, a connecting pipe 4, an earth pressure gauge fixing device 5, a circular groove tray 5-1, a fixing screw 5-2, an earth pressure gauge 6, a data acquisition and wireless transmission device 7, a solar power supply system 8, and an earth pressure gauge cable 9.

[0049] One end of the steel pipe 1 is formed into a steel drill bit, which vertically penetrates through the center of the steel plate 2 and is fixed to form the base of the monitoring device. On the side of the steel plate 2 close to the ground, a number of rib plates 3 are evenly spaced around the steel pipe 1 and are fixedly connected to the steel plate 2 for reinforcement; on the other side of the steel plate 2, that is, the upper part of the steel pipe 1, a connecting pipe 4 is arranged at intervals. One end of the connecting pipe 4 is fixed to the steel pipe 1, and the other end is connected to the support for the earth pressure gauge fixing device 5; the earth pressure gauge 6 is placed on the earth pressure gauge fixing device 5, and one earth pressure gauge 6 can be correspondingly placed on each earth pressure gauge fixing device 5. The earth pressure gauge cable 9 is connected to the data acquisition and wireless transmission device 7 and the solar power supply system 8 through the channels inside the connecting pipe 4 and the channels inside the steel pipe 1, and receives power from the solar power supply system 8. In addition, during the dredger fill process, the earth pressure gauge data is transmitted to the computer terminal through the wireless transmission device 7; the wireless transmission device 7 and the solar power supply system 8 are fixed to the upper part of the steel pipe 1, that is, the other end opposite to the steel drill bit.

[0050] In one embodiment, four rib plates 3 are evenly spaced around the steel pipe 1 and are fixedly connected to the steel plate 2 for reinforcement, that is, the four rib plates 3 are evenly arranged around the steel pipe 1 at intervals of 90 degrees.

[0051] In one embodiment, the distance between the connecting pipes 4 on the steel pipe 2 is 1 m, that is, the earth pressure gauges are arranged at intervals of 1 m in the vertical direction; in the radial direction, several connecting pipes are symmetrically distributed about the center of the steel pipe. For example, 2 connecting pipes can be arranged at positions on the circumference separated by 180°; or 4 connecting pipes can be arranged at positions opposite to each other on the circumference.

[0052] In one embodiment, the earth pressure gauge fixing device 5 includes a circular groove tray 5-1 and fixing screws 5-2. The circular groove tray 5-1 is used to accommodate and place the earth pressure gauge 6, and several fixing screws 5-2 can strengthen the fixation of the earth pressure gauge 6 through the holes on the circular groove tray 5-1; in one embodiment, three fixing screws 5-2 can be used to strengthen the fixation of the earth pressure gauge 6 at evenly spaced intervals (120 degrees apart from each other) on the circumference, as Figure 2 shown.

[0053] In one embodiment, the steel pipe 1 and the steel plate 2 are fixed by welding, and the length of the steel pipe 1 passing through the steel plate 2 is greater than or equal to 50 cm.

[0054] In one embodiment, the steel plate 2 is square, and the steel pipe 1 penetrates through the geometric center of the square.

[0055] A method for monitoring the soil unit weight during the dredger fill process includes the following steps:

[0056] 1) Weld the steel pipe and the steel plate to form a base, and add welded rib plates;

[0057] 2) Install the earth pressure gauge onto the circular groove tray and tighten the fixing screws.

[0058] 3) Connect the earth pressure gauge fixing device to the steel pipe with a connecting pipe.

[0059] 4) Install the solar power supply system, data acquisition and wireless transmission equipment, and complete the assembly of the overall device.

[0060] 5) Place the device at the preset position in the site to be filled by hydraulic fill, and wait for the hydraulic fill construction of the site.

[0061] 6) Monitor the earth pressure values at each measuring point during the hydraulic fill process and transmit them to the computer terminal in real time.

[0062] 7) Calculate the corresponding bulk density of the hydraulic fill soil and feed back to the hydraulic fill construction.

[0063] Pass one end of the steel pipe through the steel plate and fix it to form the base of the monitoring device. The steel pipe and the steel plate are fixed by welding. The length of the steel pipe passing through the steel plate is not less than 50 cm, and welding ribs are added to ensure the fixing effect. Install the earth pressure gauges on the steel pipe above the steel plate at an interval of 1 m. After the earth pressure gauges are placed on the circular groove trays, tighten the fixing screws to fix them. The circular groove trays and the steel pipes are rigidly connected by connecting pipes. The cables of the earth pressure gauges are connected to the data acquisition and wireless transmission devices at the top through the holes reserved in the connecting pipes and the steel pipes. According to the monitoring data and relevant physical and mechanical formulas, calculate the bulk density of the corresponding hydraulic fill soil layer. The specific calculation process and calculation formula are as follows:

[0064] Suppose there are earth pressure gauges numbered from 1 to N. The formula for calculating the average bulk density of the hydraulic fill soil between any two earth pressure gauges A and B is as follows:

[0065]

[0066] γ—the average bulk density of the hydraulic fill soil between earth pressure gauges A and B, kN / m3

[0067] H—the vertical distance between earth pressure gauges A and B, m

[0068] P1, P2—the vertical earth pressure values measured by earth pressure gauges A and B, kPa

[0069] Transmit the bulk density of the corresponding hydraulic fill soil layer calculated from the data of the earth pressure gauges during the hydraulic fill process to the computer terminal through the wireless transmission device for monitoring.

[0070] In a reclamation project, it is planned to fill the seabed silt to form land by hydraulic fill. The average depth of the filled silt is about 6 m. To ensure the uniformity and stability of the filled soil mass, the device and method of the present utility model are used for the dynamic monitoring of the bulk density of the soil.

[0071] At each monitoring point location, install the soil bulk density monitoring device according to the method proposed by the present utility model. According to the actual situation of the reclamation area, the average depth of the reclaimed silt is about 6m. Each monitoring device is provided with 6 earth pressure gauges, which are arranged at equal intervals in the vertical direction, and the distance between two adjacent earth pressure gauges is 1m.

[0072] For the convenience of identification and data analysis, the earth pressure gauges are numbered sequentially from bottom to top according to the depth. Among them, the earth pressure gauge at the deepest part (i.e., the original beach surface) is numbered 1. Moving upwards in sequence, the No. 2 earth pressure gauge is located 1m above the original beach surface, the No. 3 is located 2m above the original beach surface, and so on. The earth pressure gauge at the shallowest part (i.e., 5m above the original beach surface) is numbered 6.

[0073] Taking a certain typical monitoring point as an example, when the depth of the reclaimed silt is 2m, the data measured by the No. 1 and No. 2 earth pressure gauges are 29.3kPa and 14.5kPa respectively. According to the data of adjacent earth pressure gauges, the average bulk density of each soil layer can be calculated as follows:

[0074] The average bulk density of the soil layer from 0 to 1m above the original beach surface is: (29.3 - 14.5) / 9.8 = 1.51kN / m 3

[0075] The average bulk density of the soil layer from 1 to 2m above the original beach surface is: (14.5 - 0) / 9.8 = 1.48kN / m 3

[0076] Similarly, when the depth of the reclaimed silt is 4m, the data measured by the No. 1, No. 2, No. 3, and No. 4 earth pressure gauges are 59.8kPa, 44.5kPa, 29.4kPa, and 14.6kPa respectively. The average bulk density of each soil layer is calculated as follows:

[0077] The average bulk density of the soil layer from 0 to 1m above the original beach surface is: (59.8 - 44.5) / 9.8 = 1.56kN / m 3

[0078] The average bulk density of the soil layer from 1 to 2m above the original beach surface is: (44.5 - 29.4) / 9.8 = 1.54kN / m 3

[0079] The average bulk density of the soil layer from 2 to 3m above the original beach surface is: (29.4 - 14.6) / 9.8 = 1.51kN / m 3

[0080] The average bulk density of the soil layer from 3 to 4m above the original beach surface is: (14.6 - 0) / 9.8 = 1.49kN / m 3

[0081] Finally, when the dredger fill silt depth was 6 m, the data measured by earth pressure gauges No. 1, No. 2, No. 3, No. 4, No. 5, and No. 6 were 90.3 kPa, 74.7 kPa, 59.3 kPa, 44.1 kPa, 29.1 kPa, and 14.4 kPa respectively. The average unit weights of each soil layer were calculated as follows:

[0082] The average unit weight of the soil layer from 0 to 1 m above the original beach surface was: (90.3 - 74.7) / 9.8 = 1.59 kN / m 3

[0083] The average unit weight of the soil layer from 1 to 2 m above the original beach surface was: (74.7 - 59.3) / 9.8 = 1.57 kN / m 3

[0084] The average unit weight of the soil layer from 2 to 3 m above the original beach surface was: (59.3 - 44.1) / 9.8 = 1.55 kN / m 3

[0085] The average unit weight of the soil layer from 3 to 4 m above the original beach surface was: (44.1 - 29.1) / 9.8 = 1.53 kN / m 3

[0086] The average unit weight of the soil layer from 4 to 5 m above the original beach surface was: (29.1 - 14.4) / 9.8 = 1.50 kN / m 3

[0087] The average unit weight of the soil layer from 4 to 5 m above the original beach surface was: (14.4 - 0) / 9.8 = 1.47 kN / m 3

[0088] By applying the soil unit weight monitoring device and method of the present utility model in a reclamation project, the following remarkable effects have been achieved:

[0089] (1) Realize the dynamic monitoring of the soil unit weight during the whole dredger fill process, timely discover and solve the problem of under-compaction of local soil layers, and improve the uniformity and stability of the dredger fill soil;

[0090] (2) Optimize the dredger fill process parameters such as the dredger fill rate and slurry concentration, improve the dredger fill efficiency and quality, and shorten the construction period;

[0091] (3) Reduce the workload of manual sampling and on-site detection, save manpower and material resources, and improve the reliability and timeliness of monitoring data;

[0092] (4) Provide important data support for the consolidation settlement analysis of the dredger fill soil and the formulation of subsequent foundation treatment plans, and ensure the quality and safety of the entire reclamation project.

[0093] In summary, the soil bulk density monitoring device and method proposed by the present utility model have sufficient feasibility and effectiveness, and can be applied to reclamation projects.

[0094] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the present utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present utility model is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A device for monitoring soil bulk density during filling, characterized in that: The invention comprises a base, wherein the base is composed of a bottom plate and a supporting device, the supporting device is fixed on the bottom plate, and a plurality of earth pressure gauges are arranged on the supporting device at intervals; The supporting device comprises a main supporting rod and a plurality of sub-supporting rods arranged thereon; The main support rod is a rigid tube, and the sub-support rod is a connecting tube; one end of the rigid tube is formed into a drill bit, which vertically passes through the center of the base plate and is fixed to form a base of the monitoring device; on the rigid tube above the base plate, a plurality of connecting tubes are arranged at intervals, one end of each connecting tube is fixed on the rigid tube, and the other end is connected to support the soil pressure gauge fixing device; the soil pressure gauge is placed on the soil pressure gauge fixing device.

2. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: The bottom plate is a square, and the supporting device passes through the geometric center of the square.

3. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: A plurality of ribs are evenly spaced around the rigid tube below the bottom plate and are connected and fixed to the bottom plate for reinforcement.

4. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: The rigid tube and the bottom plate are fixed by welding.

5. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: The rigid tube is made of a steel tube, the bottom plate is made of a steel plate, and the length of the steel tube passing through the steel plate is greater than or equal to 50 cm.

6. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: The invention also comprises a wireless transmitting device and a solar power supply system which are fixed to the other end of the rigid tube opposite to the drill bit.

7. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: The cable of the soil pressure gauge is connected to the data acquisition and wireless transmission equipment and the solar power supply system through the channel inside the connecting tube and the channel inside the rigid tube, receives power from the solar power supply system, and transmits the soil pressure gauge data during the filling process to the outside through the wireless transmission equipment.

8. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: Four ribs evenly spaced around the rigid tube are connected and fixed to the bottom plate for reinforcement, and the four ribs are evenly spaced 90 degrees around the rigid tube.

9. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: The soil pressure gauge fixing device comprises a round groove tray and fixing screws. The round groove tray is used to accommodate and place the soil pressure gauge. A plurality of fixing screws are provided to strengthen the fixing of the soil pressure gauge through holes on the round groove tray.

10. The device for monitoring soil bulk density during filling according to claim 9, characterized in that: Three fixing screws are provided at intervals of 120 degrees from each other on the circumference to strengthen the fixation of the earth pressure gauge.

11. The device for monitoring soil bulk density during filling process according to claim 1, characterized in that: The distances between the connecting pipes on the rigid pipe are equal; and / or the earth pressure gauges are arranged at equal intervals in the vertical direction; and / or the connecting pipes are symmetrically distributed about the center of the rigid pipe in the radial direction.

12. The device for monitoring soil bulk density during filling according to claim 1, characterized in that: The distance between each of the connecting pipes on the rigid pipe is 1m, and the earth pressure gauges are arranged at intervals of 1m in the vertical direction.

13. The device for monitoring soil bulk density during filling process according to claim 1, characterized in that: Two connecting pipes are provided, and are located at positions 180° apart on the circumference; or four connecting pipes are provided, and are located at positions opposite to each other on the circumference.

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