Automatic comprehensive monitoring device for pore water pressure and stratified settlement in soft soil foundation engineering

Abstract

The present invention belongs to the technical field of soft soil foundation engineering monitoring, and provides an automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering, including a measuring rod device that can be buried underground and a data acquisition device located on the ground; the measuring rod device includes a measuring rod assembly and a settlement anchor assembly; there are multiple measuring rod assemblies, and the multiple measuring rod assemblies are connected together in sequence up and down. The present invention can select the number of measuring rod assemblies according to the measurement point requirements of different projects, and multiple measuring rod assemblies are butt-jointed and assembled together up and down to adapt to different depth intervals, which has the advantage of convenient installation and construction. At the same time, the measurement data is transmitted to the data acquisition device in real time, and the entire monitoring process can be realized without on-site operation by personnel, realizing the simultaneous monitoring of stratified settlement and pore water pressure in different depth intervals and automatic real-time monitoring, which is conducive to reducing the cost of long-term monitoring and maintaining good monitoring accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of soft soil foundation engineering monitoring, and in particular relates to an automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering. Background Art

[0002] Before the construction of soft soil foundation engineering, the soft soil foundation must be treated before the subsequent construction work can be carried out. In soft soil foundation engineering, the monitoring of pore water pressure and stratified settlement is a very important monitoring indicator in the soft foundation monitoring process, which plays a key role in the evaluation of the later foundation treatment effect.

[0003] In the existing soft foundation monitoring project, pore water pressure and stratified settlement need to be drilled and buried separately, and the monitoring process is mainly based on manual intermittent monitoring at regular intervals; among them, pore water pressure is generally installed independently, and the height position of the pore water pressure gauge is controlled by controlling the length of the cable on the pore water pressure gauge. This installation method has the disadvantages of complex construction and inaccurate installation position. The measurement of stratified settlement is mainly carried out by magnetic rings. For example, Chinese patent application 202221096321.2 discloses an automatic monitoring device for stratified settlement based on soft foundation treatment, including a settlement reference tube and a settlement detection assembly, the upper end of the settlement reference tube is submerged in the silt soft foundation of the soft foundation treatment, the lower end of the settlement reference tube passes through the silt layer to the stable layer, and the settlement detection assembly includes multiple active magnetic rings and multiple magnetostrictive measuring mechanisms, multiple active magnetic rings are arranged on the outside of the settlement reference tube at a certain distance from top to bottom, and multiple magnetostrictive measuring mechanisms are installed on the inside of the settlement reference tube. The magnetostrictive measuring mechanism transmits the position signal of the active magnetic ring through the cable. The measurement method in the prior art such as the above is intermittent measurement and cannot achieve real-time detection.

[0004] In addition, manual monitoring methods are prone to large errors, and have shortcomings such as low monitoring accuracy, great construction difficulty, and high long-term monitoring costs. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] An automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering, comprising a measuring rod device that can be buried underground and a collecting instrument device located on the ground;

[0008] The measuring rod device comprises a measuring rod assembly and a settlement anchor point assembly;

[0009] The measuring rod assembly comprises a connecting structure rod, two limit fixing plates and a plurality of travel protection shells, wherein the two limit fixing plates are respectively installed at the upper and lower ends of the connecting structure rod, and the plurality of travel protection shells are distributed at intervals on the periphery of the connecting structure rod and connected to the limit fixing plates; wherein the number of the measuring rod assemblies is multiple, and the plurality of measuring rod assemblies are sequentially connected together from top to bottom;

[0010] The settlement anchor assembly comprises an annular body and a settlement anchor member, wherein the settlement anchor member is arranged on the annular body; wherein the annular body is sleeved on the measuring rod assembly and can slide on the measuring rod assembly;

[0011] The collector device includes a collector housing, a control panel, a plurality of pore water pressure gauges and a plurality of draw-wire displacement gauges. The plurality of pore water pressure gauges are respectively arranged on different measuring rod assemblies and electrically connected to the control panel. The draw-wire displacement gauge is arranged in the collector housing and electrically connected to the control panel. A linkage rope is provided at the measuring end of the draw-wire displacement gauge, and the linkage rope is correspondingly connected to the annular body in the settlement anchor assembly. When the settlement anchor assembly generates a settlement displacement, the draw-wire displacement gauge can be driven by the linkage rope to generate a displacement change, so as to obtain the settlement amount in different depth intervals accordingly.

[0012] Preferably, the number of the settlement anchor parts is more than two, and the more than two settlement anchor parts are arranged on the outer wall surface of the annular body in a circular array; wherein the settlement anchor parts extend obliquely in a direction away from the annular body.

[0013] Preferably, connecting flanges are provided at both ends of the connecting structure rod, and the connecting flanges of adjacent connecting structure rods are plugged into each other; wherein, a center hole is provided in the middle of the limit fixing plate, which cooperates with the connecting structure rod and can be passed through by the connecting structure rod, and a first fixing hole extending along its radial direction and passing through the center hole and a first fixing member arranged in the first fixing hole are provided on the limit fixing plate, and a first connecting hole is provided on the connecting flange. When installing, the first connecting hole and the first fixing hole are flush with each other in the upper and lower directions, and the first fixing member passes through the first fixing hole and the first connecting hole, so that the limit fixing plate can be installed on the two connecting structure rods while the upper and lower connecting structure rods are connected.

[0014] Preferably, the cross-section of the connecting structure rod is polygonal, and the cross-sectional shape of the center hole matches the cross-sectional shape of the connecting structure rod; wherein the connecting flange is a prismatic structure extending along the length direction of the connecting structure rod, and the cross-sectional shape of the connecting flange is half of the cross-sectional shape of the connecting structure rod.

[0015] Preferably, the position-limiting fixing plate is provided with a mounting hole for mounting the pore water pressure gauge and a second fixing hole connected with the mounting hole, the mounting hole is arranged beside the central hole, and the second fixing hole extends inwardly along the position-limiting fixing plate and is connected with the mounting hole; wherein a second fixing member for fixing the pore water pressure gauge is provided in the second fixing hole;

[0016] The limit fixing plate is further provided with two wire passing holes, both of which are crescent-shaped and arranged on both sides of the central hole, and the wire passing holes are used for allowing the cable of the pore water pressure meter located below to pass upward.

[0017] Preferably, a plurality of third fixing holes are provided on the circumference of the position-limiting fixing plate, the plurality of third fixing holes are used to fix the travel protection shell, and the third fixing holes have lateral openings to allow the outer contour of the travel protection shell to extend outward beyond the outer contour edge of the position-limiting fixing plate;

[0018] The third fixing hole is in a stepped shape, including an upper hole section and a lower hole section, the cross-section of the upper hole section is semicircular, and the cross-section of the lower hole section is arc-shaped; wherein, a clamping convex edge is provided at the end of the stroke protection shell, and during installation, the end of the stroke protection shell is plugged into and matched with the lower hole section, and the clamping convex edge is plugged into and matched with the upper hole section.

[0019] Preferably, the clamping convex edge and the upper hole section are tightly fitted.

[0020] Preferably, the collector housing includes a first housing, a second housing and an intermediate connecting pipe, wherein the intermediate connecting pipe is located between the first housing and the second housing; the first housing is used to install the wire-type displacement meter, and the second housing is used to install the control board;

[0021] The first shell includes a bottom plate, a top plate and an annular connecting seat, the draw-wire displacement meter is mounted on the bottom plate, and a plurality of the draw-wire displacement meters are arranged at intervals along the circumference of the annular connecting seat; wherein a wire outlet hole is provided on the bottom plate, and a guide wheel assembly is provided between the horizontal wire outlet end of the draw-wire displacement meter and the wire outlet hole, and the guide wheel assembly is used to turn the horizontal outlet of the draw-wire displacement meter into a vertical outlet.

[0022] Preferably, the collector device also includes a solar energy component, which includes a mounting bracket, a solar panel, a fixed cross frame, a panel frame cross bar and a damping hinge. The fixed cross frame is arranged on the collector housing through the mounting bracket, the damping hinge is arranged on the fixed cross frame, the solar panel is connected to the damping hinge through the panel frame cross bar, and the solar panel is electrically connected to the control panel.

[0023] Preferably, it also includes a supporting device, which includes a supporting seat, a supporting column, a supporting rod and a fixing nut. The supporting column is arranged in the middle of the supporting seat. The supporting column is provided with a matching through hole for the measuring rod assembly to pass through. The supporting rod is fixed to the supporting seat by the fixing nut. The supporting seat is buried in the ground through the supporting rod. The collector device is connected to the supporting column and is on the ground.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The monitoring device of the present invention comprises a measuring rod device and a collecting instrument device. When in use, the measuring rod device is buried in a measuring hole so that a plurality of pore water pressure gauges and a plurality of settlement anchor point assemblies carried thereon can be installed correspondingly to different depth intervals at one time. The pore water pressure is directly measured by the pore water pressure gauge, and the stratified settlement amount is measured by a pull-wire displacement meter that forms a linkage with the plurality of settlement anchor point assemblies, and the measurement data is transmitted to the collecting instrument device in real time. The entire monitoring process can be realized without on-site operation by personnel, thereby realizing simultaneous monitoring of stratified settlement and pore water pressure in different depth intervals and automated real-time monitoring, which is beneficial to reducing the cost of long-term monitoring and maintaining good monitoring accuracy.

[0026] The measuring rod device in the present invention adopts a modular structure, and the number of measuring rod components can be selected according to the measuring point requirements of different projects. Multiple measuring rod components are assembled together up and down to adapt to different depth ranges, which has the advantage of convenient installation and construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0028] Figure 1 It is an overall diagram of an embodiment of the automatic comprehensive monitoring device of the present invention;

[0029] Figure 2 A structural diagram of the connection between two measuring rod assemblies;

[0030] Figure 3 for Figure 2 An enlarged schematic diagram of the part marked A;

[0031] Figure 4 It is a schematic diagram of the structural decomposition of the end of the measuring rod assembly;

[0032] Figure 5 Schematic diagram of the connection process of two measuring rod components Figure 1 ;

[0033] Figure 6 Schematic diagram of the connection process of two measuring rod components Figure 2 ;

[0034] Figure 7 A three-dimensional diagram of connecting structural rods;

[0035] Figure 8 It is a three-dimensional diagram of the limit fixing plate;

[0036] Fig. 9 It is a top view of the limit fixing plate;

[0037] Fig.10 for Fig. 9 An enlarged schematic diagram of the part marked with B;

[0038] Fig.11 It is a schematic diagram of the first structure of the end of the travel protection shell;

[0039] Fig.12 It is a schematic diagram of the second structure of the end of the travel protection shell;

[0040] Fig.13 It is the state diagram of the settlement anchor component;

[0041] Fig.14 It is a structural diagram of the collector device;

[0042] Fig.15 It is an exploded view of the collector device;

[0043] Fig.16 This is the installation diagram of the wire-type displacement meter;

[0044] Fig.17 for Fig.16 A three-dimensional cross-sectional view of

[0045] Fig.18 An exploded structural diagram of a solar panel;

[0046] Fig.19 A three-dimensional diagram of the supporting device. DETAILED DESCRIPTION

[0047] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0049] The automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering according to the embodiment of the present invention is as follows Figure 1 As shown, it includes a measuring rod device 10 that can be buried underground and a data collector device 20 located on the ground; wherein, the measuring rod device 10 includes a measuring rod assembly and a settlement anchor point assembly 30, the measuring rod device 10 is mainly used to carry test sensors and matching kits linked to the sensors, etc. When in use, the measuring rod device 10 is buried in the measuring hole at the monitoring site and the measuring hole is backfilled after the installation is completed; the data collector device 20 is mainly used to provide sensors and collect and transmit monitoring data of the sensors, and its main functions include but are not limited to power supply for components, data collection, signal conversion, communication and data transmission, etc., so as to realize the monitoring of the pore water pressure at the specified depth measuring point and the soil settlement of the soft soil foundation.

[0050] The sensors in the acquisition device 20 include a pore water pressure gauge (not shown) and a wire displacement meter 21. The number of the pore water pressure gauge and the wire displacement meter 21 is multiple, for example, ten. The multiple pore water pressure gauges are respectively installed in different measuring rod assemblies in different depth intervals in the measuring rod device 10, so as to measure the pore water pressure in the corresponding depth interval. Please continue to refer to Figure 1Different depth intervals in the measuring rod device 10 are also correspondingly configured with multiple settlement anchor point assemblies 30. The settlement anchor point assembly 30 is a matching kit linked with the sensor, and can slide freely on the measuring rod assembly; multiple pull-wire displacement meters 21 are installed in the collector housing 22 of the collector device 20, and the measuring ends of the pull-wire displacement meters 21 are respectively connected to the multiple settlement anchor point assemblies 30 one by one through different linkage ropes 23, and then when the settlement anchor point assembly 30 generates settlement displacement, the linkage rope 23 drives the pull-wire displacement meter 21 to generate a change in displacement, and finally the soil layer settlement in different depth intervals of the soft soil foundation is obtained.

[0051] The measuring rod device 10 in the embodiment adopts a modular structure, which includes a plurality of measuring rod assemblies that can be assembled and connected together in sequence. Different numbers of measuring rod assemblies can be assembled and connected to each other to adapt to different monitoring depth intervals, thereby meeting the measuring point requirements required by different construction sites; for the convenience of display, Figure 1-2 Only two measuring rod assemblies are shown. When in use, the specific number of measuring rod assemblies can be selected according to the monitoring depth. The specific number of measuring rod assemblies is not limited here. For example: the height of the measuring rod assembly is 1m. When the depth of the measuring point is about 20m, 20 measuring rod assemblies can be combined to obtain a measuring rod device 10 with a length of 20m. When the depth of the measuring point is about 30m, 30 measuring rod assemblies can be combined to obtain a measuring rod device 10 with a length of 30m, and so on.

[0052] like Figure 2 As shown, the two measuring rod assemblies are an upper measuring rod assembly 10a and a lower measuring rod assembly 10b, and the upper measuring rod assembly 10a and the lower measuring rod assembly 10b are assembled together to have a longer length. Further, a settlement anchor assembly 30 is mounted on one of the measuring rod assemblies, and the settlement anchor assembly 30 can cooperate with the soil in the corresponding monitoring depth interval when the measuring rod device 10 is installed in place, and slides on the same measuring rod assembly or different measuring rod assemblies accordingly as the soil settles.

[0053] The settlement anchor assembly 30 includes an annular body 31 and a plurality of settlement anchors 32, wherein the plurality of settlement anchors 32 are preferably arranged in a circular array on the outer wall of the annular body 31, and the settlement anchors 32 extend obliquely in a direction away from the annular body 31; wherein the settlement anchors 32 are specifically sheet-like elastic members, and the ends thereof away from the annular body 31 are preferably bent. During installation, the settlement anchors 32 are, for example, tied to the measuring rod assembly by kraft paper, and basically no displacement occurs; after a period of time (generally 2-3 days) after installation, the kraft paper gradually breaks after being soaked in water, and the settlement anchors 32 restore their initial shape and slowly spring open, and are inserted into the surrounding soil, and can settle with the soil. During the monitoring process of being buried in the measuring hole, changes in soil settlement can drive the settlement anchor assembly 30 to slide relative to the measuring rod device 10, and then transmit the settlement amount at the corresponding position to the corresponding wire displacement meter 21 through the linkage rope 23 for real-time monitoring.

[0054] like Figure 2-4 As shown, the measuring rod assembly includes a connecting structure rod 11, two limit fixing plates 12 and a plurality of travel protection shells 13; the two limit fixing plates 12 are respectively installed at the upper and lower ends of the connecting structure rod 11, and the plurality of travel protection shells 13 are distributed at intervals on the periphery of the connecting structure rod 11 and installed on the two limit fixing plates 12, and the number of travel protection shells 13 does not exceed ten.

[0055] The connecting structure rod 11 is a central shaft rod, which mainly provides high-strength structural support and assembly connection. The connecting structure rod 11 is a hard rod, preferably a metal rod, such as an aluminum alloy rod, which has high structural strength and relatively light weight. Specifically, both ends of the connecting structure rod 11 are arranged as plug-in connection ends, so that the upper and lower connecting structure rods 11 can be connected together. Figures 5 to 7 As shown, the end of the connecting structure rod 11 is formed into a connecting flange 111 obtained by half-cutting along its length direction, and the connecting flange 111 is provided with a first connecting hole 112 arranged along its radial direction. The connecting flanges 111 at the corresponding ends of the connecting structure rods 11 connected end to end are inserted together so that the first connecting holes 112 on the connecting flanges 111 correspond to each other, and then connected by a connecting member arranged in or passing through the first connecting hole 112. The connecting member is specifically a bolt.

[0056] The cross section of the connecting structure rod 11 is preferably a polygonal rod, specifically a regular polygonal rod; please continue to refer to Figure 7In the embodiment, the connecting structure rod 11 is specifically a regular hexagonal rod, and the connecting flange 111 at the end of the connecting structure rod 11 forms a quadrangular prism structure with an isosceles trapezoidal cross section, and the two connecting flanges 111 are spliced ​​and combined to form a regular hexagonal rod; the main advantages of this arrangement are: on the one hand, the convenient assembly between the connecting structure rods 11 connected end to end can be quickly completed, and at the same time, a locking space is provided for the connecting parts; on the other hand, the angular positioning in the circumferential direction can be provided for the connecting structure rod 11 itself, which is conducive to the sequential docking of multiple connecting structure rods 11.

[0057] like Figure 8 As shown, a center hole 121 which is adapted to the contour shape of the cross section of the connecting structure rod 11 and can be passed through by the connecting structure rod 11 is provided in the middle of the limiting fixing disk 12. In order to connect the limiting fixing disk 12 and the connecting structure rod 11, a first fixing hole 122 which extends along its radial direction and passes through the center hole 121 is provided on the limiting fixing disk 12. At least a part of the first fixing hole 122 is a threaded hole. A first fixing member is provided in the first fixing hole 122. The first fixing member is specifically a fixing bolt. The first fixing member passes through the first fixing hole 122 and the first connecting hole 112, so that the limiting fixing disk 12 is fixedly installed on the two connecting structure rods 11 while the upper and lower connecting structure rods 11 are connected.

[0058] The assembly structure of adjacent measuring rod assemblies is realized by the fitting assembly of the upper and lower limiting fixing plates 12 of the adjacent measuring rod assemblies and the complete plug-in fit of the connecting flanges 111 on the upper and lower connecting structure rods 11; Figure 5 and 6As shown, in the embodiment, the connecting structure rod 11 located at the top is provided with a second transverse connecting hole 113 adjacent to the connecting flange 111 below it, and when the upper limiting fixing plate 12 in the lower measuring rod assembly slides until the first fixing hole 122 is flush with the second connecting hole 113, the fixing bolt is allowed to pass through the first fixing hole 122 and the second connecting hole 113 and complete the connection between the connecting structure rod 11 and the limiting fixing plate 12; correspondingly, the number of the first connecting holes 112 is multiple, for example, three, and the first fixing hole 122 in the upper limiting fixing plate 12 in the lower measuring rod assembly is aligned with the uppermost first connecting hole 122 of the connecting structure rod 11 The holes 112 are flush with each other; the connecting structure rod 11 located at the top forms a plug-in fit with the connecting structure rod 11 in the lower measuring rod assembly, and cooperates with the central hole of the limiting fixing disk 12 located at the top in the lower measuring rod assembly, and the first connecting holes 112 of the above two connecting structure rods 11 are aligned; the limiting fixing disk 12 located relatively at the top and the limiting fixing disk 12 located at the bottom in the two measuring rod assemblies fit together, and the two connecting structure rods 11 are locked and connected; finally, the two connecting structure rods 11 are fully connected by two locking bolts that pass through the two groups of first connecting holes 112 located at the bottom, thereby realizing the fully assembled structure of the upper and lower measuring rod assemblies.

[0059] The limit fixing plate 12 is used as an end support member, mainly for providing an installation position for the pore water pressure gauge and an installation fixing position for the travel protection shell 13; preferably, the limit fixing plate 12 is made of metal such as aluminum alloy. Figure 8 As shown, the limiting fixing plate 12 is provided with a mounting hole 123 located beside the center hole 121. The mounting hole 123 is used to install the pore water pressure gauge. The specific shape of the mounting hole 123 is a cylindrical hole that is compatible with the cylindrical body of the pore water pressure gauge. In order to save space, the projection of the mounting hole 123 on the horizontal plane is an arc and has a lateral opening. When installing, the pore water pressure gauge can only be installed from top to bottom or from bottom to top and cannot be taken out radially outward from the lateral opening.

[0060] The limiting fixing plate 12 is provided with a second fixing hole 124 extending inwardly along its outer circumference and obliquely extending into the mounting hole 123. The second fixing hole 124 is connected to the mounting hole 123. A second fixing member is provided in the second fixing hole 124. The second fixing member is specifically a locking screw, which is used to laterally lock the pore water pressure gauge to achieve complete positioning. Preferably, the number of the second fixing holes 124 is two, and the two second fixing holes 124 are symmetrically arranged compared to the mounting hole 123; wherein, the two second fixing holes 124 are both provided with locking screws.

[0061] During on-site construction, the cables of the pore water pressure gauge need to be buried in the on-site measuring hole. In order to keep the cables of multiple pore water pressure gauges neat and avoid interference with the hole wall of the on-site measuring hole during the lowering of the measuring rod device 10, the cables in the embodiment are completely confined in the vertical wrapping space of the measuring rod device 10. Please continue to refer to Figure 8 , two crescent-shaped wire holes 125 are provided in the middle of the limiting fixing disk 12 around the center hole 121, and there is a certain interval between the two wire holes 125 in the circumferential direction of the limiting fixing disk 12 to maintain the limiting fixing disk 12 with a high structural strength. In the process of assembling and lowering the measuring rod device 10 one by one, the cable of the pore water pressure gauge located below passes upward through the wire hole 125 of the limiting fixing disk 12 located above, so as to realize centralized guidance and limiting of the cable. Under the limiting effect of the wire hole 125, the cable will not move outward to the outside of the cylindrical wrapping space of the measuring rod device 10, and will not contact and interfere with the wall of the on-site measuring hole, which can effectively reduce the risk of collapse of the measuring hole and facilitate the smooth lowering of the measuring rod device 10.

[0062] The stroke protection shell 13 in the embodiment is mainly used for passing the linkage rope 23 and protecting the linkage rope 23, so as to prevent the linkage rope 23 from being unevenly stressed after the hole is backfilled, thereby pulling the wire displacement meter 21 to produce an abnormal monitoring displacement, and ultimately affecting the measurement accuracy of the wire displacement meter 21. In order to ensure the structural strength of the stroke protection shell 13 and prevent it from deforming during the backfilling process, the stroke protection shell 13 adopts a hard tube structure, preferably a hard metal round tube, such as an aluminum alloy tube.

[0063] At present, the diameter of the measuring hole in the soft soil foundation is usually about 110mm-130mm. The diameter of the measuring rod assembly in the embodiment is specifically below 90mm, which is conducive to avoiding as much as possible the contact between the measuring rod assembly and the surrounding wall of the measuring hole with a large contact force during the lowering process in the measuring hole; for example, the opposite side diameter of the connecting structure rod 11 is preferably 14mm, the diameter of the limit fixing plate 12 is preferably 70mm, the outer diameter of the travel protection shell is 10mm and the inner diameter is 8mm, and the diameter of the linkage rope 23 is 0.8mm or 1mm; in addition, the maximum outer diameter of the annular body 31 in the settlement anchor assembly 30 is preferably 84mm, and the inner diameter is preferably 76mm. The settlement anchor member 32 does not exceed the annular body 31 when it is retracted, and the outer diameter when it is fully opened is 150mm; under the above structure, the smoothness of the lowering of the measuring rod device 10 can be guaranteed, and the smooth sliding of the annular body 31 on the measuring rod device 10 and the more sufficient insertion of the settlement anchor member 32 into the surrounding soil for synchronous settlement can be achieved.

[0064] Please refer again Figure 2-4 and Figure 8, the specific connection structure between the stroke protection shell 13 and the limiting fixed disk 12 is: a plurality of third fixing holes 126 are provided on the circumference of the limiting fixed disk 12, and the plurality of third fixing holes 126 are used to fix the stroke protection shell 13. The number of the third fixing holes 126 is the same as that of the stroke protection shell 13, and the spacing between adjacent third fixing holes 126 is preferably the same. The two ends of the stroke protection shell 13 are respectively provided in the third fixing holes 126 in the upper and lower limiting fixed disks 12, and the fixation of the stroke protection shell 13 is achieved by the two limiting fixed disks 12. Among them, the two ends of the stroke protection shell 13 and the third fixing holes 126 are plug-in tight-fitting connections, and the stroke protection shell 13 inserted into the third fixing holes 126 will not easily detach from the stroke protection shell 13 without a large external force.

[0065] At present, the settlement of soft soil foundation projects is usually less than three meters, so the sliding range of the settlement anchor assembly 30 mounted on the measuring rod assembly needs to be set to three meters; as an optional solution, the length of a single measuring rod assembly can be directly set to three meters, and each measuring rod assembly is mounted with a settlement anchor assembly 30. However, such a measuring rod assembly with a length of three meters needs to occupy a larger storage space, and also requires larger auxiliary equipment for installation. At the same time, the travel protection shell 13 with a length of three meters will also deform to a certain extent, which will indirectly affect the movement of the linkage rope 23.

[0066] As a more optimal solution, the length of a single measuring rod assembly is set to be shorter, for example, 1 meter or 1.5 meters, etc.; taking into account the settlement monitoring standards in different regions (usually there are two settlement ranges of 2 meters and 3 meters), the length of the measuring rod assembly in the embodiment is set to 1 meter. On the one hand, the length of the measuring rod assembly itself is short, which is convenient for transportation, installation and on-site construction, and will not cause deformation. On the other hand, the measuring rod assembly can adapt to different monitoring standards and has good versatility.

[0067] In order to achieve smooth sliding of the settlement anchor assembly 30 on different measuring rod assemblies, Figure 8-10 As shown, in the radial direction, the outer contour edge R of the travel protection shell 13 needs to be set to exceed the outer contour edge L of the limiting fixing plate 12. Under such a structure, the limiting fixing plate 12 will not interfere with and hinder the sliding of the settlement anchor point assembly 30.

[0068] The third fixing hole 126 also has a lateral opening, thereby allowing the outer contour edge R of the travel protection shell 13 to exceed the outer contour edge L of the limit fixing plate 12; for details, please continue to refer to Figure 8The third fixing hole 126 in the up and down directions is in a stepped shape, and includes an upper hole section 1261 and a lower hole section 1262, wherein, in the horizontal plane projection, the cross-section of the upper hole section 1261 is semicircular, and the cross-section of the lower hole section 1262 is arc-shaped, and a protective portion 1263 is formed on the relatively outer side of the upper hole section 1261 to provide lateral protection for the lower hole section 1262, and the protective portion 1263 is used to provide lateral limitation for the stroke protection shell 13 inserted into the third fixing hole 126, so as to prevent the stroke protection shell 13 from moving directly outward and detaching from the third fixing hole 126.

[0069] like Fig.11 As shown, the end of the stroke protection shell 13 is specifically half-cut to form a locking convex edge 131. During installation, the end of the stroke protection shell 13 is plugged into and matched with the lower hole section 1262, and the locking convex edge 131 is plugged into and matched with the upper hole section 1261; the protective portion 1263 is formed into an arc-shaped constricted shape that is compatible with the locking convex edge 131. When the stroke protection shell 13 and the limiting fixed disk 12 are plugged into a matching connection, the locking convex edge 131 extends into the protective portion 1263 and protrudes upward until the end edge of the locking convex edge 131 is flush with the surface of the limiting fixed disk 12, and the locking convex edge 131 and the upper hole section 1261 cooperate to form a channel for the linkage rope 23 to pass through; at the same time, a relatively closed part of the end of the stroke protection shell 13 extends into the lower hole section 1262 to form a relatively closed matching connection.

[0070] In the above structure, the protective part 1263 is also tightly connected with the clamping convex edge 131, so that the travel protection shell 13 and the limit fixing disk 12 can be matched and connected without other locking parts. At the same time, when the two measuring rod assemblies are assembled together through the connecting structure rod 11, the adjacent limit fixing disks 12 are in contact and keep the corresponding third fixing holes 126 aligned up and down, so that the corresponding travel protection shells 13 are aligned, in contact and conductive, so as to achieve the sealing of the connection between the travel protection shell 13 and the limit fixing disk 12, which is conducive to preventing mud and sand from entering the travel protection shell 13 and affecting the movement of the linkage rope 23, and finally it is conducive to ensuring the measurement accuracy and the service life of the overall structure. Preferably, after the two measuring rod assemblies are assembled together, the geotextile filter cloth is wrapped around the periphery of the two matching limit fixing disks 12, and the geotextile filter cloth covers the lateral opening of the third fixing hole 126 to completely prevent mud and sand from entering the travel protection shell 13.

[0071] As a further solution, the protection portion 1263 extends inwardly to slightly interfere with the clamping convex edge 131, such as Fig.12As shown, at least one of the two vertical edges of the clamping flange 131 is arranged to be inclined, so that the clamping flange 131 can be better inserted into the third fixing hole 126 at the beginning of assembly, thereby facilitating assembly. Preferably, one or more cutouts 1311 are also preferably provided in the middle of the clamping flange 131. The structure of the cutout 1311 is conducive to the clamping flange 131 to form a small deformation during the assembly process, and finally achieve a clamping fit between the clamping flange 131 and the protective portion 1263.

[0072] like Figure 2 and Fig.13 As shown, the linkage rope 23 is located in the stroke protection shell 13 in the upper measuring rod assembly and protrudes downward and is connected to the annular body 31 in the settlement anchor point assembly 30 on the measuring rod assembly located below. For example, a connecting groove adapted to the linkage rope 23 is provided on the annular body 31, and the linkage rope 23 is bundled in the connecting groove; correspondingly, the measuring rod assembly located below no longer installs the stroke protection shell 13 at the position corresponding to the aforementioned internal stroke protection shell 13 through which the linkage rope 23 passes, thereby avoiding the linkage rope 23 protruding downward; wherein, the linkage rope 23 extends upward into the collector device 20 and is connected to the outlet end of the corresponding pull-wire displacement meter 21 in the collector device 20, so as to realize the linkage between the settlement anchor point assembly 30 and the pull-wire displacement meter 21.

[0073] It should be pointed out here that the linkage rope 23 connected to the settlement anchor point assembly 30 is protected by the stroke protection shell 13 within the length interval extending upward, until it extends out of the ground and is connected to the output end of the pull-wire displacement meter 21; the stroke protection shell 13 is no longer provided within the measuring range of the linkage rope 23 connected to the settlement anchor point assembly 30 extending downward, so that the linkage rope 23 can be avoided; in addition, the stroke protection shell 13 can be selectively set as needed in the length interval below the measuring range of the settlement anchor point assembly 30, and the stroke protection shell 13 here mainly plays a supporting role.

[0074] Specifically, the linkage rope 23 is a steel wire rope, which can be buried in a soft soil foundation for a long time.

[0075] The data acquisition device 20 also includes a control board 24, a data transmission module (not shown) and a power module 25. The control board 24 is specifically compatible with both vibrating string signal acquisition and RS485 signal acquisition, thereby realizing simultaneous acquisition of data from the wire displacement meter 21 and the pore water pressure meter; at the same time, the data acquisition data of the control board 24 is transmitted to the back-end platform (software platform or host computer platform) through the data transmission module. The power module 25, for example, uses a lithium battery pack to provide a long-term power supply to the control board 24, the data transmission module and other components.

[0076] Figure 14-17 As shown, the collector housing 22 includes a first housing 221, a second housing 222 and an intermediate connecting tube 223, wherein the intermediate connecting tube 223 is located in the middle of the first housing 221 and the second housing 222; wherein the first housing 221 is located at the lower part of the intermediate connecting tube 223, and is mainly used to accommodate the pull-wire displacement meter 21 and to connect with the top of the measuring rod device 10; the second housing 222 is mainly used to accommodate and install the control board 24, the data transmission module and the power supply module 25, etc.; the intermediate connecting tube 223 is a hollow tube, which is mainly used for allowing the cables in the first housing 221 to pass through the second housing 222.

[0077] like Fig.15 As shown, the first housing 221 includes a bottom plate 2211, a top plate 2212 and an annular connecting seat 2213. The bottom plate 2211 is provided with a plurality of wire outlet holes 2214 that are compatible with the plurality of hole structures on the limiting fixing disk 12, that is, the bottom plate 2211 itself is used as the limiting fixing disk 12 located at the uppermost end. Correspondingly, the bottom plate 2211 is also provided with a threading hole 2215 for the cables of a plurality of pore water pressure gauges to pass through. Among them, the bottom plate 2211 is also provided with a rod sleeve 2216 for the uppermost connecting structure rod 11 to pass through, and the rod sleeve 2216 is provided with more than one locking hole 2217. The connecting structure rod 11 is locked by a bolt set in the locking hole 2217 to complete the fixed connection between the first housing 221 and the measuring rod device 10.

[0078] Among them, a first accommodating cavity is formed between the bottom plate 2211, the top plate 2212 and the annular connecting seat 2213, and the wire-drawing displacement meters 21 are arranged at intervals and installed on the bottom plate 2211; since the wire-drawing displacement meter 21 itself has a large volume, when its outlet end is directly downward, the wire-drawing displacement meter 21 itself will cause interference and cannot be installed in a single layer; in order to solve the above problem, it is necessary to increase the volume of the first accommodating cavity. As a better improvement, in the embodiment, a guide wheel assembly 26 is added between the outlet hole 2214 and the horizontal outlet end of the wire-drawing displacement meter 21, such as Figure 16-17 As shown, the horizontal outlet of the wire-drawing displacement meter 21 can be turned into a vertical outlet through the guidance of the guide wheel assembly 26, and then the pull rope of the wire-drawing displacement meter is correspondingly extended downward into different stroke protection shells 13 and connected with the linkage rope 23. Among them, multiple wire-drawing displacement meters 21 are preferably arranged circumferentially at intervals along the same circumference of the annular connecting seat 2213, and fixed to the bottom plate 2211 through the L-shaped connecting plate 27.

[0079] A lifting block 28 is provided on the bottom plate 2211, and the lifting block 28 has an inclined upper surface 281; wherein the guide wheel assembly 26 includes a pulley 261 and a bracket 262, and the bracket 262 is installed on the upper surface 281 of the lifting block 28 in an inclined manner so as to support the pulley 261 while avoiding the wire outlet hole 2214 in the vertical direction, and finally keep the wire outlet end of the wire-drawing displacement meter 21 sliding smoothly on the pulley 261. In the embodiment, the guide wheel assembly 26 provided can ensure the stability of the linkage between the linkage rope 23 and the wire outlet section of the wire-drawing displacement meter 21, thereby ensuring the accuracy of the measurement; at the same time, the existence of the guide wheel assembly 26 also helps to make the installation of the wire-drawing displacement meter 21 more compact.

[0080] Specifically, the second housing 222 needs to be waterproofed; the second housing 222 includes a mounting plate 2221 and a mushroom head cover 2222. The mounting plate 2221 is detachably fixed to the top of the intermediate connecting pipe 223. A stepped support structure may also be provided on the periphery of the mounting plate 2221. The mushroom head cover 2222 is fitted onto the top of the mounting plate 2221 and supported on the stepped support structure thereon, and is locked with a transverse screw. Preferably, a sealing ring is provided at the stepped support structure of the mounting plate 2221, which is conducive to ensuring the sealing of the connection.

[0081] As an optional structure, the bottom edge of the mushroom head cover 2222 preferably extends downward beyond the bottom edge of the mounting plate 2221 to form a drip line, so that even in rainy days, rainwater will not enter the second accommodation cavity formed by the mounting plate 2221 and the mushroom head cover 2222 from the connection. Among them, the control board 24, the data transmission module and the power module 25 are all installed on the mounting plate 2221, and the mushroom head cover 2222 is specifically made of plastic, so that the antenna of the data transmission module can be built-in and has a higher aesthetics. Furthermore, a plurality of perforations 2223 are provided in the middle of the mounting plate 2221, and a waterproof plug (not shown in the figure) that can pass the wire is provided at the perforation 2223, thereby ensuring the waterproofness of the second accommodation cavity.

[0082] As an extended structure, the collector device 20 in the embodiment also includes a solar module 29, such as Fig.18 As shown, the solar module 29 includes a mounting bracket, a solar panel 291, a fixed cross frame 292, a panel frame cross bar 293 and a damping hinge 294. The fixed cross frame 292 is arranged on the middle connecting pipe 223 through the mounting bracket, the damping hinge 294 is arranged on the fixed cross frame 292, the solar panel 291 is connected to the damping hinge 294 through the panel frame cross bar 293, and the solar panel 291 is electrically connected to the power module 25; in the embodiment, the power module 25 can be stored with energy through the solar module 29 to ensure long-term automatic monitoring in units of quarters / half years / years.

[0083] As an optional structure, a supporting device 40 may also be provided in the embodiment. The supporting device 40 is arranged on the ground layer of the test point to provide auxiliary support for the collector device 20; wherein the supporting device 40 has a matching through hole 45 for the measuring rod device 10 to pass through, and the bottom of the collector device 20 can be supported or installed on the top of the supporting device 40.

[0084] When in use, first place the support device 40 flat on the ground layer of the test point, then connect the multiple measuring rod assemblies in sequence to the specified depth, and then install the collector device 20. After all installations are completed, backfill is performed. During the monitoring process, the change in soil layer settlement will drive the settlement anchor point assembly 30 to displace, and synchronously drive the length of the outgoing line of the pull-wire displacement meter 21 to change through the linkage rope 23, thereby obtaining the settlement data of the soil body; at the same time, the pore water pressure is monitored in real time through the pore water pressure gauges installed at different depth intervals to obtain the pore water pressure data; finally, the obtained layered settlement data and pore water pressure data are transmitted to the back-end cloud platform through the data transmission device, and the data is displayed and the results data is downloaded; this embodiment can simultaneously realize 7*24h all-weather automatic monitoring of the settlement of soft soil foundations at different depths and different soil layers.

[0085] An exemplary structure of the support device 40 is as follows: Fig.19 As shown, it includes a support seat 41, a support column 42, a plurality of support rods 43 and a fixing nut 44; wherein, the support column 42 is arranged in the middle of the support seat 41, and is preferably integrally formed with the support seat 41, and a through hole 45 is formed in the middle of the support column 42 and passes through it up and down; preferably, a plurality of reinforcing ribs 46 are provided on the outer periphery of the support column 42 to thereby improve the structural strength of the support column 42.

[0086] A plurality of support rods 43 are fixed to the support seat 41 through the fixing nut member 44. The support seat 41 is pre-buried at the ground layer position of the test point through the support rod 43 to form positioning and guidance; then, the measuring rod assembly in the measuring rod device 10 is sequentially lowered from the matching through hole 45 until it is fully installed; the collector device 20 is connected to the support column 42, so that the collector device 20 is connected to the support device 40.

[0087] In summary, the advantages of this embodiment are as follows:

[0088] 1. Comprehensive and uninterrupted measurement of pore water pressure and stratified settlement

[0089] The measuring rod device provided in this embodiment cooperates with the data acquisition device to realize the comprehensive monitoring of pore water pressure and stratified settlement. In combination with the data acquisition device, it realizes all-weather uninterrupted measurement and remote transmission of data, thus solving the problems of discontinuous measurement, low efficiency, and human errors caused by current manual intermittent measurement.

[0090] 2. Long-term continuous measurement of stratified settlement

[0091] The structure of settlement anchor point assembly, linkage rope and wire displacement meter is used to replace the stratified settlement magnetic ring, which is buried at different depths. The physical movement distance is measured by the wire displacement meter to avoid measurement interruption caused by the original stratified settlement magnetic ring falling out of the measurement range of the magnetic sensor, thereby realizing long-term continuous monitoring of stratified settlement.

[0092] 3. Segmented depth measurable components

[0093] The measuring rod components adopt quick splicing technology, which can be freely spliced ​​with each other to meet the requirements of different depths of different projects, and realize combined installation of any depth of meters, so as to increase the storage quantity of equipment and improve work efficiency.

[0094] 4. All-weather automated monitoring improves efficiency

[0095] It can realize the integrated measurement of pore water pressure and stratified settlement, and combine the automatic measurement of the wire-type displacement meter and cloud data transmission to realize remote all-weather automatic monitoring, while effectively reducing the cost brought by personnel measurement and improving work efficiency.

[0096] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering, characterized in that: It includes a measuring rod device that can be buried underground and a collecting instrument device located on the ground; The measuring rod device comprises a measuring rod assembly and a settlement anchor point assembly; The measuring rod assembly comprises a connecting structure rod, two limit fixing plates and a plurality of travel protection shells, wherein the two limit fixing plates are respectively installed at the upper and lower ends of the connecting structure rod, and the plurality of travel protection shells are distributed at intervals on the periphery of the connecting structure rod and connected to the limit fixing plates; wherein the number of the measuring rod assemblies is multiple, and the plurality of measuring rod assemblies are sequentially connected together from top to bottom; The settlement anchor assembly comprises an annular body and a settlement anchor member, wherein the settlement anchor member is arranged on the annular body; wherein the annular body is sleeved on the measuring rod assembly and can slide on the measuring rod assembly; The collector device comprises a collector housing, a control panel, a plurality of pore water pressure gauges and a plurality of draw-wire displacement gauges, wherein the plurality of pore water pressure gauges are respectively arranged on different measuring rod assemblies and electrically connected to the control panel, and the draw-wire displacement gauge is arranged in the collector housing and electrically connected to the control panel; wherein a linkage rope is arranged at the measuring end of the draw-wire displacement gauge, and is correspondingly connected to the annular body in the settlement anchor assembly through the linkage rope, and when the settlement anchor assembly generates a settlement displacement, the draw-wire displacement gauge can be driven by the linkage rope to generate a displacement change, so as to obtain the settlement amount in different depth intervals accordingly; The two ends of the connecting structure rod are provided with connecting convex edges, and the connecting convex edges of adjacent connecting structure rods are plugged and connected; wherein, the middle part of the limit fixing plate is provided with a center hole that matches the connecting structure rod and can be passed through by the connecting structure rod, the limit fixing plate is provided with a first fixing hole extending along its radial direction and passing through the center hole, and a first fixing piece arranged in the first fixing hole is provided on the connecting convex edge, and the first connecting hole and the first fixing hole are flush in the upper and lower directions during installation, and the first fixing piece passes through the first fixing hole and the first connecting hole, so that the limit fixing plate is installed on the two connecting structure rods while the upper and lower connecting structure rods are butt-jointed; The position-limiting fixing plate is provided with a mounting hole for mounting the pore water pressure gauge and a second fixing hole connected with the mounting hole, the mounting hole is arranged beside the central hole, the second fixing hole extends inwardly along the position-limiting fixing plate and is connected with the mounting hole; wherein a second fixing member for fixing the pore water pressure gauge is provided in the second fixing hole; The limit fixing plate is further provided with two wire holes, both of which are crescent-shaped and arranged on both sides of the central hole, and the wire holes are used for allowing the cable of the pore water pressure meter located below to pass upward; A plurality of third fixing holes are provided on the circumference of the position-limiting fixing plate, and the plurality of third fixing holes are used to fix the travel protection shell, and the third fixing holes have lateral openings to allow the outer contour of the travel protection shell to extend outward beyond the outer contour edge of the position-limiting fixing plate; The third fixing hole is in a stepped shape, including an upper hole section and a lower hole section, the cross section of the upper hole section is semicircular, and the cross section of the lower hole section is superior arc-shaped; wherein, a clamping convex edge is provided at the end of the stroke protection shell, and during installation, the end of the stroke protection shell is plugged and matched with the lower hole section, and the clamping convex edge is plugged and matched with the upper hole section; The clamping convex edge is tightly fitted with the upper hole section.

2. The automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering according to claim 1 is characterized in that: The number of the settlement anchoring parts is more than two, and the more than two settlement anchoring parts are arranged on the outer wall surface of the annular body in a circular array; wherein the settlement anchoring parts extend obliquely in a direction away from the annular body.

3. The automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering according to claim 1 is characterized in that: The cross section of the connecting structure rod is polygonal, and the cross section shape of the center hole matches the cross section shape of the connecting structure rod; wherein the connecting flange is a prismatic structure extending along the length direction of the connecting structure rod, and the cross section of the connecting flange is half of the cross section of the connecting structure rod.

4. The automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering according to claim 1 is characterized in that: The housing of the collector includes a first housing, a second housing and an intermediate connecting pipe, wherein the intermediate connecting pipe is located between the first housing and the second housing; the first housing is used to install the wire displacement meter, and the second housing is used to install the control board; The first shell includes a bottom plate, a top plate and an annular connecting seat, the draw-wire displacement meter is mounted on the bottom plate, and a plurality of the draw-wire displacement meters are arranged at intervals along the circumference of the annular connecting seat; wherein a wire outlet hole is provided on the bottom plate, and a guide wheel assembly is provided between the horizontal wire outlet end of the draw-wire displacement meter and the wire outlet hole, and the guide wheel assembly is used to turn the horizontal outlet of the draw-wire displacement meter into a vertical outlet.

5. The automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering according to claim 1 is characterized in that: The collector device also includes a solar energy component, which includes a mounting bracket, a solar panel, a fixed horizontal frame, a panel frame cross bar and a damping hinge. The fixed horizontal frame is arranged on the collector housing through the mounting bracket, the damping hinge is arranged on the fixed horizontal frame, the solar panel is connected to the damping hinge through the panel frame cross bar, and the solar panel is electrically connected to the control panel.

6. The automatic comprehensive monitoring device for pore water pressure and stratified settlement of soft soil foundation engineering according to claim 1 is characterized in that: It also includes a supporting device, which includes a supporting seat, a supporting column, a supporting rod and a fixing nut. The supporting column is arranged in the middle of the supporting seat. The supporting column is provided with a matching through hole for the measuring rod assembly to pass through. The supporting rod is fixed to the supporting seat by the fixing nut. The supporting seat is buried in the ground through the supporting rod. The collector device is connected to the supporting column and is on the ground.

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