Automatic monitoring method of vacuum degree at multiple depths in vacuum preloading soil

Abstract

The present invention discloses a method for automatically monitoring the vacuum degree of a vacuum preloaded soil body at multiple depths, which includes determining the monitoring point according to the depth of the detection hole; assembling a measuring tube equipped with a corresponding number of pressure monitoring units according to the monitoring point; installing a collection base equipped with a collection board at the top position of the detection hole, the collection base is installed on the surface of the soil body and is located below the preload sealing film; establishing a data connection between the collection board and all the pressure monitoring units; after the preload sealing film is laid, installing a communication base equipped with a forwarding module capable of long-distance data transmission at the detection hole, the communication base corresponding to the collection base is installed on the surface of the soil body and is located above the preload sealing film; the forwarding module establishes a communication link with the user terminal, and the monitoring data acquired by the collection board is transmitted to the forwarding module by wireless means, and then forwarded to the user terminal by the forwarding module. The present invention has the advantages of strong practicality and being conducive to on-site construction.

Description

Technical Field

[0001] The invention relates to a method for automatically monitoring the vacuum degree of vacuum preloading soil at multiple depths. Background Art

[0002] The observation of soil vacuum degree in vacuum preloading method, especially the vacuum degree under the sealing membrane, is an important indicator for construction process control, and is an important basis for understanding whether the preloading load meets the design requirements and evaluating the vacuum preloading reinforcement effect. Among them, accurate and effective measurement of vacuum degree under the sealing membrane can, on the one hand, provide construction personnel with timely information on vacuum degree changes, so that the soil vacuum degree detection results are highly synchronized; on the other hand, it can provide accurate information feedback for the entire project construction, which is conducive to information coordination and information platform management, and thus facilitates real-time control of vacuum preloading construction quality; in addition, it can also provide early warning information and conduct early warning control management in a timely and effective manner to ensure the safety of construction.

[0003] The current vacuum degree monitoring method mainly relies on manual labor, which has the disadvantages of low efficiency due to the need for personnel to read meters and record measurements point by point, and the inability to continuously monitor the changes in vacuum pressure. In order to solve the above problems, wireless measurement methods are proposed in the prior art. For example, Chinese patent CN202111517244.3 discloses an embedded vacuum preload vacuum degree wireless measurement device and method. The device includes a cavity, a data acquisition module and a data transmission module. The cavity is a breathable and impermeable structure and is placed in a sand cushion layer in the vacuum monitoring area. The data acquisition module is arranged in the cavity and is used to collect monitoring signals. The data transmission module is connected to the data acquisition module and is used for wireless transmission of signals. The data acquisition module is directly embedded in the vacuum sensor, and combined with an external breathable and waterproof protective shell, the data acquisition module and the vacuum sensor are buried together under the sealing membrane to measure the vacuum degree, and remote wireless control and monitoring of the vacuum degree can be realized.

[0004] However, in technical solutions such as the above, the data cable and antenna of the data acquisition module need to penetrate the pre-pressed sealing film (the interface between the vacuum sealing film and the waterproof data cable is sealed with a double layer of waterproof airtight glue and plastic tie). In this way, the vacuum sealing film is damaged and the sealing film needs to be sealed. During construction, water leakage often occurs at the damaged position. Summary of the invention

[0005] In order to at least partially solve the deficiencies in the prior art, the main purpose of the present invention is to provide a method for automatically monitoring the vacuum degree at multiple depths of a vacuum preloaded soil body.

[0006] In order to achieve the above main purpose, the present invention discloses a method for automatically monitoring the vacuum degree of a vacuum preloaded soil at multiple depths, which comprises:

[0007] Determine the monitoring point according to the depth of the detection hole;

[0008] According to the monitoring points, a measuring tube equipped with a corresponding number of pressure monitoring units is installed;

[0009] A collection base equipped with a collection plate is installed at the top of the detection hole. The collection base is installed on the soil surface and is located below the pre-pressed sealing membrane.

[0010] Establish data connection between the acquisition board and all pressure monitoring units to obtain corresponding monitoring data of the monitoring points;

[0011] After the pre-pressing sealing film is laid, a communication base equipped with a forwarding module capable of long-distance data transmission is installed at the detection hole. The communication base is installed on the soil surface corresponding to the collection base and is located above the pre-pressing sealing film. The collection base and the communication base are separated by the pre-pressing sealing film without damaging the pre-pressing sealing film.

[0012] The forwarding module establishes a communication link with the user terminal. The monitoring data acquired by the acquisition board is transmitted to the forwarding module wirelessly, and then forwarded to the user terminal through the forwarding module to realize continuous monitoring of multiple monitoring points.

[0013] In the above technical scheme of the present invention, the vacuum data of the pressure monitoring unit is obtained through the acquisition board, and the acquisition board located under the pre-pressing sealing film establishes communication transmission with the forwarding module located on the pre-pressing sealing film in a wireless manner, and transmits and forwards the vacuum monitoring data obtained by the acquisition board to the user terminal. On the one hand, this method will not damage the pre-pressing sealing film when realizing automatic vacuum monitoring to avoid the downward leakage caused by the damage of the pre-pressing sealing film in the traditional technical method, which affects the normal construction. On the other hand, the data transmission process will not be affected by the water covering the surface of the pre-pressing sealing film during the pre-pressing construction stage to maintain the stability of data transmission. It has the advantages of strong practicality and convenience for on-site construction.

[0014] Furthermore, the pressure monitoring unit is, for example, a pressure sensor, which is directly arranged at the depth of the monitoring point, which belongs to direct measurement. Compared with the traditional method of using a pressure catheter, the measurement data is more accurate.

[0015] According to a specific embodiment of the present invention, a first wireless transmission unit connected to the data of the acquisition board is provided in the acquisition base, and a second wireless transmission unit connected to the data of the forwarding module is provided in the communication base. When in use, the monitoring data acquired by the acquisition board is transmitted to the forwarding module via the link established by the first wireless transmission unit and the second wireless transmission unit.

[0016] According to a specific embodiment of the present invention, the collection base is a sealed base, which at least includes a removable top cover, the top cover is a plastic top cover, and the first wireless transmission unit is installed adjacent to the inner side of the top cover; the communication base is a sealed base, which at least includes a removable bottom cover, and the second wireless transmission unit is installed adjacent to the inner side of the bottom cover.

[0017] In the above technical solution of the present invention, the collection base and the communication base adopt a sealed base, which can be used for a long time in soft foundation scenes, and is suitable for use in scenes where the vacuum preloading soil is highly humid and is flooded by heaped water. To achieve wireless transmission, the shell part between the first wireless transmission unit and the second wireless transmission unit, that is, the top cover and the bottom cover are made of plastic, which can maintain its waterproofness on the one hand, and achieve the penetration and transmission of wireless signals on the other hand, and finally achieve stable wireless transmission of data on the upper and lower sides of the preloading sealing membrane.

[0018] According to a specific embodiment of the present invention, one of the top cover and the bottom cover is provided with a protrusion, and the other of the top cover and the bottom cover is provided with a groove corresponding to the protrusion. When the communication base is installed in place, the protrusion extends into the groove and keeps the upper surface of the top cover and the lower surface of the bottom cover tightly against the pre-pressed sealing film respectively.

[0019] In the above technical solution of the present invention, by setting the raised portion and the groove portion, the top cover and the bottom cover can be quickly docked and matched, thereby avoiding relative displacement between the two in the horizontal plane and realizing rapid positioning and installation; it should be noted here that the raised height of the raised portion is relatively low, which can effectively protect the pre-pressed sealing membrane from being damaged.

[0020] According to a specific embodiment of the present invention, at least one of the corresponding surfaces of the top cover and the bottom cover is provided with a flexible anti-skid protrusion, and when the communication base is installed in place, the flexible anti-skid protrusion is squeezed and deformed.

[0021] According to a specific embodiment of the present invention, a group of magnetic parts are provided on the top cover and the bottom cover, and when the communication base is installed in place, the group of magnetic parts are attracted to each other to keep the position of the communication base stable.

[0022] In the above technical solution of the present invention, this group of magnetic parts can better realize a relatively stable assembly connection between the bottom cover (communication base) and the top cover (collection base), and even in a relatively harsh construction environment during the vacuum preloading process, the position between the two can still be kept stable, thereby maintaining stable communication and data transmission.

[0023] According to a specific embodiment of the present invention, a first battery module for supplying power to the acquisition board is provided in the acquisition base, and a second battery module is provided in the communication base, and the second battery module charges the first battery module through the wireless charging module; wherein the wireless charging module comprises a first charging coil module and a second charging coil module, the first charging coil module is installed on the upper surface of the bottom cover or is pre-installed in the bottom cover, and the second charging coil module is installed on the lower surface of the top cover or is pre-installed in the top cover.

[0024] According to a specific embodiment of the present invention, an extension rod extending upward is provided on the outside of the communication base, and the antenna of the forwarding module is arranged on the extension rod. After the pre-pressed sealing film is covered with water, the antenna of the forwarding module is always kept above the water surface.

[0025] According to a specific implementation of the present invention, the depths of the multiple pressure monitoring units carried on the measuring tube in the detection hole are different and unique.

[0026] According to a specific embodiment of the present invention, the measuring tube is an assembled structure, which includes a plurality of vacuum detection tubes of the same length and adapter tubes with a series of length specifications. Each vacuum detection tube is equipped with a pressure monitoring unit, and different vacuum detection tubes are spliced ​​together at upper and lower intervals through adapter tubes so that the plurality of pressure monitoring units correspond to monitoring points in different depth areas.

[0027] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a framework diagram of the monitoring method of the present invention;

[0029] Figure 2 is a flow chart of the monitoring method of the present invention;

[0030] Figure 3 is a structural diagram of a monitoring device for executing the above monitoring method;

[0031] Figure 4 yes Figure 3 A partial map of

[0032] Figure 5 is a three-dimensional cross-sectional view of a vacuum detection tube;

[0033] Figure 6 yes Figure 5 A front view of

[0034] Figure 7 This is an exploded view of the vacuum detection tube and the transfer tube;

[0035] Figure 8It is an exploded anatomical view of the acquisition base and the communication base;

[0036] Fig. 9 This is an exploded view of the collection base;

[0037] Fig.10 This is an exploded view of the communication base;

[0038] Fig.11 It is a partial structural diagram of a first extended embodiment of the vacuum degree monitoring device of the present invention;

[0039] Fig.12 It is an overall structural diagram of a second extended embodiment of the vacuum degree monitoring device of the present invention;

[0040] Fig.13 It is an exploded view of the acquisition base, communication base and locking assembly;

[0041] Fig.14 It is a structural diagram of the positioning plate and the folding and unfolding module;

[0042] Fig.15 yes Fig.14 A top view of

[0043] Fig.16 yes Fig.15 Another position state diagram of ;

[0044] Fig.17 It is a three-dimensional cross-sectional view of the positioning plate and the folding and unfolding module;

[0045] Fig.18 yes Fig.17 A front view of

[0046] Fig.19 It is the decomposition structure diagram of the folding module;

[0047] Fig. 20 It is the structural diagram of the upload board. DETAILED DESCRIPTION

[0048] In the following description, many specific details are explained in conjunction with the embodiments to facilitate a full understanding of the present invention. However, it should be understood that the following embodiments and detailed descriptions are only for illustrative purposes and do not limit the scope of protection of the present invention.

[0049] like Figure 1-2 As shown, the method for automatically monitoring the vacuum degree of a vacuum preloaded soil body at multiple depths according to an embodiment of the present invention includes the following steps:

[0050] The monitoring point is determined according to the depth of the detection hole; wherein, the detection hole is obtained by on-site drilling of the vacuum preloaded soil, and the depth of the detection hole is determined and obtained according to the construction standards and requirements. Here, the number of monitoring points required for the current detection hole and the specific depth range of the monitoring points are determined according to the actual depth of the detection hole and the monitoring requirements.

[0051] According to the monitoring points, a measuring tube equipped with a corresponding number of pressure monitoring units is installed; preferably, the depths of the multiple pressure monitoring units carried on the measuring tube in the detection hole are different and unique. For example, when the detection hole depth is 20 meters, the monitoring points are arranged in intervals of 4 meters, and a monitoring point is arranged every 1 meter in the depth interval of 0-4 meters, the corresponding pressure monitoring unit (selected as a pressure sensor that can be directly measured) is configured to the corresponding position on the measuring tube, and the pressure monitoring unit is installed in place by lowering the measuring tube to the specified installation depth.

[0052] A collection base equipped with a collection plate is installed at the top of the detection hole. The collection base is installed on the soil surface and is located below the pre-compression sealing membrane. The measuring tube is preferably connected to the collection base, so that the measuring tube can be ensured to be in the designed / predetermined installation position before the detection hole is backfilled.

[0053] Establish a data connection between the acquisition board and all pressure monitoring units to obtain the corresponding monitoring data of the monitoring points; among them, the pressure monitoring unit can realize continuous monitoring, and the acquisition board can obtain data as needed, for example, at intervals of every 5 / 10 / 20 / 30 minutes, or at intervals of 1 / 2 / 3 / 4 / 5 hours, etc., which can be set specifically according to monitoring needs.

[0054] After the pre-compression sealing membrane is laid, a communication base equipped with a forwarding module for long-distance data transmission is installed at the detection hole. The communication base corresponds to the collection base installed on the soil surface and located above the pre-compression sealing membrane. The collection base and the communication base are separated by the pre-compression sealing membrane without damaging the pre-compression sealing membrane. The communication base is mainly used to obtain the data obtained by the collection board wirelessly, which is aimed at the data of the collection board under the pre-compression sealing membrane cannot be transmitted by conventional means due to the surface of the vacuum pre-compression sealing membrane being covered with water during the soft foundation construction, and the water coverage depth is often more than 50 cm (more than 1.5 meters in some projects).

[0055] The forwarding module establishes a communication link with the user terminal, and the monitoring data acquired by the acquisition board is transmitted to the forwarding module by wireless means, and then forwarded to the user terminal by the forwarding module to achieve continuous monitoring of multiple monitoring points. In the above process, the acquisition board establishes a communication link with the forwarding module by wireless means, and the forwarding module establishes a communication link with the user terminal. The above relay communication method can achieve stable data transmission without damaging the pre-pressed sealing film in the harsh communication environment on site, and realize continuous monitoring of the changes in vacuum pressure during the construction process.

[0056] Among them, the communication link established between the acquisition board and the forwarding module is, for example, a wireless communication link based on the lora or ZigBee module, which has strong penetration transmission ability for short distances; specifically, the acquisition base is provided with a first wireless transmission unit connected to the data of the acquisition board, and the communication base is provided with a second wireless transmission unit connected to the data of the forwarding module. When in use, the monitoring data acquired by the acquisition board is transmitted to the forwarding module via the link established by the first wireless transmission unit and the second wireless transmission unit.

[0057] Furthermore, the collection base is a sealed base, which at least includes a removable top cover, which is a plastic top cover, and the first wireless transmission unit is installed adjacent to the inner side of the top cover; the communication base is a sealed base, which at least includes a removable bottom cover, and the second wireless transmission unit is installed adjacent to the inner side of the bottom cover. The collection base and the communication base adopt a sealed base, which can be used for a long time in soft foundation scenarios, and are suitable for use in vacuum preloading soil with high humidity and flooding by heap water. In order to realize wireless transmission, the shell part between the first wireless transmission unit and the second wireless transmission unit, that is, the top cover and the bottom cover are made of plastic, which can maintain its waterproofness on the one hand, and realize the penetration and transmission of wireless signals on the other hand, and finally realize the stable wireless transmission of data on the upper and lower sides of the preloading sealing membrane.

[0058] The monitoring device formed by the aforementioned collection base 10, the measuring tube and the communication base 40 is as follows Figure 3-10 As shown, the above monitoring method is performed by the monitoring device.

[0059] The collection base 10 itself has a certain weight. In order to maintain the stability of the installation, it can be fixed for a second time by, for example, using a mounting bracket as a positioning support or partially embedding it.

[0060] Among them, the measuring tube is an assembled structure, which includes a plurality of vacuum detection tubes 20 of the same length and a transfer tube 30 with a series of length specifications. Each vacuum detection tube 20 is equipped with a pressure monitoring unit, which is a direct measurement type pressure sensor 24. Different vacuum detection tubes 20 are spliced ​​together at upper and lower intervals through the transfer tube 30, so that multiple pressure monitoring units correspond to monitoring points in different depth areas.

[0061] The adapter tube 30 is connected to the vacuum detection tube 20 to adjust the installation depth of the vacuum detection tube 20. The adapter tube 30 can have a series of specifications with the same or different lengths to adapt to the requirements of different depth areas; the adapter tube 30 in the embodiment preferably adopts a hollow stainless steel tube, which can be manufactured in advance according to the required length.

[0062] The example structure of the vacuum detection tube 20 is as follows Figure 5-7 As shown, it includes a columnar tube body 21 and a cable 22. The columnar tube body 21 has an installation cavity 21a and a pressure detection cavity 21b. The installation cavity 21a is arranged above the pressure detection cavity 21b. The pressure sensor 24 is installed in the installation cavity 21a and the probe of the pressure sensor 24 extends downward into the pressure detection cavity 21b. The cable 22 is arranged in the columnar tube body 21 via the adapter tube 30 to supply power to the pressure sensor 24.

[0063] The installation cavity 21a and the pressure detection cavity 21b are preferably independent of each other and not connected; the columnar tube 21 includes an upper tube 211, a lower tube 212 and a carrier 213. The upper tube 211 provides the installation cavity 21a, and the lower tube 212 provides the pressure detection cavity 21b. The carrier 213 is arranged on the upper tube 211 or the lower tube 212, and is used to separate the installation cavity 21a from the pressure detection cavity 21b while providing a fixed position for the pressure sensor 24. During installation, sealant can be applied to the probe of the pressure sensor 24 to further strengthen the seal.

[0064] The outer wall of the pressure detection chamber 21b is provided with a plurality of vent holes 214 and a water-proof and breathable membrane wrapped around the outside of the vent holes 214. The pressure detection chamber 21b maintains pressure communication with the soil through the vent holes 214 and the water-proof and breathable membrane. To prevent the water-proof and breathable membrane from falling off during installation, the outer side of the water-proof and breathable membrane can also be wrapped with at least one layer of geotextile.

[0065] Preferably, the middle part of the lower tube body 212 is radially contracted inwardly at equal distances to form a mounting groove 215 and an upper step connection end 212a and a lower step connection end 212b located on the upper and lower sides of the mounting groove 215. The upper step connection end 212a and the lower step connection end 212b are mainly used to better form a regular structure with the upper and lower docking points to keep the size of the entire measuring tube regular. Among them, a number of vents 214 are arranged in the mounting groove 215, and the waterproof and breathable membrane and geotextile are completely wrapped in the mounting groove 215. Under such an installation structure, when the vacuum detection tube 20 is installed and pulled out of the soil for recycling, the structure at the pressure detection chamber 21b will not be damaged, which is conducive to the reuse of the equipment.

[0066] To facilitate the power supply to the pressure sensor 24, a three-way adapter 23 is provided on the cable 22 at each vacuum detection tube 20, and the electrical connection end of the pressure sensor 24 is electrically connected to the cable 22 through the three-way adapter 23; correspondingly, a mounting hole 216 and an electrical connector 217 arranged at the mounting hole 216 are provided at the top of the upper tube body 211, a first perforation is provided on the carrier plate 213, and a second perforation is provided at the bottom of the lower tube body 212. The upper end of the cable 22 located in the vacuum detection tube 20 is led upward to the electrical connector 217, and the lower end passes through the first perforation and the second perforation in turn and extends downward to be electrically connected to other cables 22; similarly, the cable extending downward is also preferably quickly connected through an electrical connector such as a waterproof aviation plug.

[0067] The exemplary structures of the collection base 10 and the communication base 40 are as follows: Figure 8-10 As shown, the collection base 10 includes a collection base shell 11 and a first battery module 12 arranged in the inner cavity of the collection base shell 11, the collection board and the first wireless transmission unit are installed in the collection base shell 11, the first battery module 12 is electrically connected to the collection board to supply power to the first battery module 12, and the collection board is electrically connected to the first wireless transmission unit and the cable 22 respectively; preferably, the inner cavity of the collection base shell 11 is cylindrical, and the multiple batteries in the first battery module 12 are installed in the inner cavity of the collection base shell 11 in a circular array, and a columnar space is formed in the first battery module 12, and the first wireless transmission unit and the collection board are installed in the columnar space.

[0068] The communication base 40 further includes a communication base shell 41, in which the second wireless transmission module and the forwarding module 42 are both installed and electrically connected; wherein, when the data of the pressure sensor 24 is transmitted to the acquisition board, the data is transmitted via the wireless communication link between the first wireless transmission unit and the second wireless transmission unit, and the data is sent to the designated terminal through the forwarding module 42.

[0069] The collection base 10 is a sealed base, which also includes a detachable top cover 14, which is a plastic top cover, and the first wireless transmission unit is preferably installed adjacent to the inner side of the top cover 14; the communication base 40 is also a sealed base, which also includes a detachable bottom cover 43, which is also a plastic bottom cover, and the second wireless transmission unit is preferably installed adjacent to the inner side of the bottom cover 43. The above structure can make the distance between the first wireless transmission unit and the second wireless transmission unit smaller, effectively maintaining the stability of data transmission.

[0070] Furthermore, the top of the collection base shell 11 (top cover 14) is also provided with an annular protrusion 15, and the bottom of the communication base shell 41 (bottom cover 43) is provided with an annular groove 44 corresponding to the annular protrusion 15. When the communication base 40 and the collection base 10 are docked, the annular protrusion 15 extends into the annular groove 44 to form a positioning docking fit. In the embodiment, there is a clearance fit between the annular protrusion 15 and the annular groove 44 to accommodate the pre-pressed sealing film; it should be pointed out here that the height of the annular protrusion 15 (the groove depth of the annular groove 44) is relatively shallow, and will not cause pulling on the pre-pressed sealing film, and will not damage the pre-pressed sealing film.

[0071] Optionally, the corresponding surfaces of the collection base shell 11 and the communication base shell 41 are provided with flexible anti-skid protrusions, that is, flexible anti-skid protrusions are provided on the upper surface of the top cover and the lower surface of the bottom cover. When the collection base shell 11 and the communication base shell 41 are docked, the flexible anti-skid protrusions are squeezed and deformed to achieve anti-skid.

[0072] Further optionally, a group of magnetic parts are provided on the corresponding surfaces of the collection base shell 11 and the communication base shell 41. When the communication base and the collection base 10 are docked, the group of magnetic parts are attracted to each other. The group of magnetic parts can better maintain a stable connection between the collection base shell 11 and the communication base shell 41.

[0073] The communication base 40 is also provided with a charging component 50, which also supplies power to the battery module in the collection base 10 in a wireless manner, so that the collection base 10 can meet the construction needs of soft soil foundation for a long time (for example, more than one year); please refer to Figure 3-4 , Figure 8 and Fig.10The charging assembly 50 includes a solar charging module 51, a second battery module 52, a first charging coil module 53 and a second charging coil module 54. The solar charging module 51 is installed on the communication base shell 41, and the second battery module 52 is installed in the communication base shell 41. The second battery module 52 charges the first battery module 12 through a wireless charging module composed of a first charging coil module 53 and a second charging coil module 54. Among them, the first charging coil module 53 is installed on the bottom of the communication base shell 41 and is connected to the second battery module 52. The second charging coil module 54 is installed on the top of the collection base shell 11 corresponding to the first charging coil module 53.

[0074] Preferably, the first charging coil module 53 is mounted on the upper surface of the bottom cover 43 or pre-installed in the bottom cover 43 , and the second charging coil module 54 is mounted on the lower surface of the top cover 14 or pre-installed in the top cover 14 .

[0075] Specifically, the first charging coil module 53 is correspondingly installed on the bottom cover 43 and is located on the inner side of the annular groove 44, and the second charging coil module 54 is correspondingly installed on the top cover 14 and is located on the inner side of the annular protrusion 15. In this way, when the communication base 40 and the collection base 10 are positioned and docked, the first charging coil module 53 and the second charging coil module 54 are aligned accordingly, which has the advantage of convenient assembly.

[0076] The charging assembly 50 of the above structure has a certain height after installation, and can be used directly when the surface of the pre-pressed sealing film is shallow. In an optional variation, the communication base 40 may also be provided with an extension rod 45, such as Fig.11 As shown, the extension rod 45 has a long length, and the solar charging module 51 is installed on the top of the extension rod 45 so as not to be affected by the water (greater depth) covered on the surface of the pre-pressed sealing film. At the same time, the antenna of the forwarding module 42 is arranged on the extension rod 45, and the antenna of the forwarding module 42 is always kept above the water surface after the water covers the top of the pre-pressed sealing film.

[0077] The communication base 40 under the above structure can be directly supported on the soil surface through the pre-pressed sealing film in cooperation with, for example, a support frame, and at the same time, the communication base 40 and the collection base 10 are kept in cooperation, and the support and installation are achieved by using the deadweight of the communication base 40 and the support frame; in an optional extended variant, a locking assembly 60 using a mechanical floating method can also be provided, and the overall structure is as follows Fig.12As shown, the locking assembly 60 is used to lock the communication base 40 on the collection base 10 without damaging the pre-pressed sealing film, so that the communication base 40 can be stably installed, ensuring that the communication between the communication base 40 and the collection base 10 will not be disconnected during the construction process, and the effectiveness of the structure and the stability of data transmission are maintained for a long time during the entire soft soil foundation treatment process; at the same time, it also avoids the leakage problem caused by damaging the sealing film in the traditional solution, which is conducive to the smooth progress of the construction.

[0078] like Fig.13 As shown, the collection base 10, the communication base 40 and the locking assembly 60 in the embodiment are all designed in a circular manner. Through mutual nesting, docking, etc., the locking assembly 60 is used to lock the collection base 10 and the communication base 40, while ensuring that the pre-pressed sealing film will not be damaged. It is a mechanical floating limit locking cooperation structure.

[0079] The locking assembly 60 includes a positioning disk 61 and a folding module 62 having a plurality of gate plates 621. A convex groove 61a having a small top opening and a large internal space is provided in the positioning disk 61. When folded, the folding module 62 can be moved up and down through the top opening of the positioning disk 61 and placed into the convex groove 61a. When the folding module 62 is unfolded, the plurality of gate plates 621 are circumferentially unfolded and extended to the side walls of the convex groove 61a to limit the folding module 62 from detaching from the convex groove 61a.

[0080] The collection base 10 is configured to be connected to the positioning plate 61, and the communication base 40 is configured to be connected to the folding module 62. When in use, the collection base 10 and the positioning plate 61 are first fixedly installed on the soil surface, and after the surface is covered with a pre-pressed sealing film, the folding module 62 is matched and connected with the positioning plate 61 from the upper surface of the pre-pressed sealing film. The communication base 40 and the collection base 10 are connected by pulling without damaging the pre-pressed sealing film. The communication base 40 is locked to the collection base 10 by the locking assembly 60 to achieve a stable installation, so that the communication will not be disconnected due to the influence of the construction site.

[0081] like Figure 14-18 As shown, the positioning plate 61 includes a positioning base plate 611, an outer annular wall 612 and a limiting top plate 613, and the limiting top plate 613 is installed on the positioning base plate 611 through the outer annular wall 612 to form a convex groove 61a; specifically, the positioning base plate 611, the outer annular wall 612 and the limiting top plate 613 can be integrally formed; wherein, a limiting groove 61b opening toward the inside is formed between the limiting top plate 613 and the positioning base plate 611, and when the folding module 62 is unfolded, a plurality of gate plates 621 are circumferentially unfolded and extend into the limiting groove 61b.

[0082] like Fig.19As shown, the folding and unfolding module 62 further includes a download plate 622 and an upper loading plate 623 that can rotate relative to each other, and a plurality of gate plates 621 are located between the download plate 622 and the upper loading plate 623 and are preferably arranged in a circular array; when installed, the download plate 622 is in contact with the positioning base plate 611 and remains flush with each other, and a guide groove 6221 corresponding to the gate plate 621 is provided on the download plate 622, and the guide groove 6221 is inclined relative to the radial direction of the positioning plate 61, and the upper and lower sides of the gate plate 621 are respectively provided with The first rotating column 6211 and the second rotating column 6212, the gate plate 621 is connected to the upper loading plate 623 through the first rotating column 6211, and the gate plate 621 is connected to the lower loading plate 622 through the second rotating column 6212 that can slide in the guide groove 6221; wherein, when the upper loading plate 623 rotates forward or reversely, under the limiting cooperation of the guide groove 6221 and the second rotating column 6212, the first rotating column 6211 produces self-rotation and allows the gate plate 621 to swing inward or outward.

[0083] In the embodiment, an upper loading plate 623, a lower loading plate 622 and a plurality of gate plates 621 are stacked up and down to form an integral structure. The upper loading plate 623 can be rotated by applying an external force to the upper loading plate 623 to rotate. At the same time, the gate plate 621 is driven to swing inward or outward under the limiting action of the first rotating column 6211, the second rotating column 6212 and the guide groove 6221. When the gate plate 621 swings outward, at least one contour portion 621a thereof extends outward to enlarge the overall outer contour so that it can form a limiting fit with the limiting groove 61b. Finally, the floating limiting connection fit between the folding module 62 and the positioning plate 61 is achieved through the contour portion 621a.

[0084] like Figure 19-20 As shown, the locking assembly 60 further includes a movable engagement member 63; wherein the upper loading plate 623 is provided with engagement teeth 624 that rotate synchronously therewith, and the engagement teeth 624 are specifically ratchet-shaped, and when the upper loading plate 623 rotates in the reverse direction (clockwise) so that the gate plate 621 swings outward to a certain position, the engagement member 63 can engage with the engagement teeth 624 to limit the upper loading plate 623 from rotating forward and returning to a certain position. In the embodiment, the position of the folding and unfolding module 62 can be locked by the cooperation formed between the engagement member 63 and the engagement teeth 624, so that it can be kept in the unfolded position for a long time and firmly mounted on the positioning plate 61.

[0085] Preferably, the engaging member 63 is a swing arm that can rotate around the connecting shaft 64, and one end of the swing arm is provided with an engaging portion 631, which is also a tooth-shaped structure, and can form a corresponding match with the engaging teeth 624; wherein, a spring (not shown in the figure) can also be provided on the swing arm, and the spring is used to keep the engaging portion 631 on the swing arm always having a tendency to move toward the engaging teeth 624. Accordingly, a component such as a pull rope can also be connected to the swing arm, and the engaging portion 631 can be separated from the engaging teeth 624 by pulling the pull rope, so that the upper loading plate 623 can rotate in the positive direction.

[0086] Please continue reading Fig.19 In the embodiment, the gate plate 621 may also be provided with a roller 625, which is specifically arranged at the contour portion 621a. When the gate plate 621 swings outward, the pre-stressed sealing film is pulled by the roller 625; wherein the roller 625 can rotate when pulling the pre-stressed sealing film to avoid greater stress pulling on the pre-stressed sealing film. Further, optionally, an elastic stopper 626 is also provided on the gate plate 621. When the gate plate 621 swings outward, the elastic stopper 626 contacts the pre-stressed sealing film before the roller 625 to provide protection for the pre-stressed sealing film.

[0087] Please continue reading Fig.13 A plurality of exhaust holes 614 are provided on the positioning base plate 611 and the outer ring wall 612. When the pre-pressed sealing membrane is covered with water during construction, the air in the cam groove 61a is discharged outward through the exhaust holes 614, so that the pre-pressed sealing membrane can be in a relatively flat and relaxed state, which is beneficial to protecting the pre-pressed sealing membrane during the locking process.

[0088] Please refer again Figure 12-14 In the embodiment, the collection base 10 and the communication base 40 are docked and matched up and down and are located in the middle of the positioning plate 61, wherein the middle of the positioning plate 61, the download plate 622, and the upload plate 623 are correspondingly provided with perforations to facilitate installation. Further, the device also includes an upper protective shell 70 and a lower protective shell 80, the positioning plate 61 is supported on the lower protective shell 80, and the collection base 10 is located in the lower protective shell 80; the communication base 40 is located in the upper protective shell 70, and the upper protective shell 70 is supported on the positioning plate 61. Preferably, the upper protective shell 70 can rotate relative to the positioning plate 61, and the upload plate 623 is connected to the upper protective shell 70, so as to drive the folding module 62 to unfold and fold by rotating the upper protective shell 70.

[0089] Although the present invention has been described above through embodiments, the above embodiments are only used to exemplarily describe the feasible implementation schemes of the present invention, and are not used to limit the protection scope of the present invention. Any equivalent substitutions or changes made by those skilled in the art in accordance with the present invention should also be covered by the protection scope defined by the claims of the present invention.

Claims

1. A method for automatically monitoring the vacuum degree of a vacuum preloaded soil at multiple depths, characterized in that include: Determine the monitoring point according to the depth of the detection hole; According to the monitoring points, a measuring tube equipped with a corresponding number of pressure monitoring units is installed; A collection base equipped with a collection plate is installed at the top of the detection hole. The collection base is installed on the soil surface and is located below the pre-pressed sealing membrane. Establish data connection between the acquisition board and all pressure monitoring units to obtain corresponding monitoring data of the monitoring points; After the pre-pressing sealing film is laid, a communication base equipped with a forwarding module capable of long-distance data transmission is installed at the detection hole. The communication base is installed on the soil surface corresponding to the collection base and is located above the pre-pressing sealing film. The collection base and the communication base are separated by the pre-pressing sealing film without damaging the pre-pressing sealing film. The forwarding module establishes a communication link with the user terminal. The monitoring data acquired by the acquisition board is transmitted to the forwarding module wirelessly, and then forwarded to the user terminal through the forwarding module to achieve continuous monitoring of multiple monitoring points. Among them, the collection base is provided with a first wireless transmission unit connected to the data of the collection board, and the communication base is provided with a second wireless transmission unit connected to the data of the forwarding module. When in use, the monitoring data acquired by the collection board is transmitted to the forwarding module through the link established by the first wireless transmission unit and the second wireless transmission unit; The collection base is a sealed base, which at least includes a detachable top cover, which is a plastic top cover, and the first wireless transmission unit is installed adjacent to the inner side of the top cover; the communication base is a sealed base, which at least includes a detachable bottom cover, and the second wireless transmission unit is installed adjacent to the inner side of the bottom cover; One of the top cover and the bottom cover is provided with a protrusion, and the other of the top cover and the bottom cover is provided with a groove corresponding to the protrusion. When the communication base is installed in place, the protrusion extends into the groove and keeps the upper surface of the top cover and the lower surface of the bottom cover tightly against the pre-pressed sealing film respectively.

2. The method for automatically monitoring the vacuum degree at multiple depths of vacuum preloading soil according to claim 1 is characterized in that: At least one of the corresponding surfaces of the top cover and the bottom cover is provided with a flexible anti-skid convex point, and when the communication base is installed in place, the flexible anti-skid convex point is squeezed and deformed.

3. The method for automatically monitoring vacuum degree at multiple depths of vacuum preloading soil according to claim 1, characterized in that: A group of magnetic parts are arranged on the top cover and the bottom cover. When the communication base is installed in place, the group of magnetic parts are attracted to each other to keep the position of the communication base stable.

4. The method for automatically monitoring vacuum degree at multiple depths of vacuum preloading soil according to claim 1, characterized in that: A first battery module for supplying power to the acquisition board is provided in the acquisition base, and a second battery module is provided in the communication base. The second battery module charges the first battery module through the wireless charging module; wherein the wireless charging module includes a first charging coil module and a second charging coil module, the first charging coil module is installed on the upper surface of the bottom cover or pre-installed in the bottom cover, and the second charging coil module is installed on the lower surface of the top cover or pre-installed in the top cover.

5. The method for automatically monitoring vacuum degree at multiple depths of vacuum preloading soil according to claim 1, characterized in that: An extension rod extending upward is arranged on the outside of the communication base, and the antenna of the forwarding module is arranged on the extension rod. After the pre-pressed sealing film is covered with water, the antenna of the forwarding module is always kept above the water surface.

6. The method for automatically monitoring vacuum degree at multiple depths of vacuum preloading soil according to claim 1, characterized in that: The depths of the multiple pressure monitoring units carried on the measuring tube in the detection hole are different and unique.

7. The method for automatically monitoring vacuum degree at multiple depths of vacuum preloading soil according to claim 6, characterized in that: The measuring tube is an assembled structure, which includes multiple vacuum detection tubes of the same length and adapter tubes with a series of length specifications. Each vacuum detection tube is equipped with a pressure monitoring unit. Different vacuum detection tubes are spliced ​​together at intervals above and below through adapter tubes so that multiple pressure monitoring units correspond to monitoring points in different depth areas.

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