Installation method of pore water pressure and layered settlement comprehensive monitoring device for soft foundation

Abstract

The invention belongs to the technical field of soft soil foundation engineering monitoring, and provides an installation method of a pore water pressure and layered settlement comprehensive monitoring device for a soft foundation, which comprises the following steps: S1, selecting an installation measuring hole, and installing a hoisting device; s2, preassembling a measuring rod assembly; s3, the measuring rod assemblies are hoisted and put down into the measuring holes in sequence, and meanwhile the pore water pressure gauges and the settlement anchor point assemblies are installed on the corresponding measuring rod assemblies; s4, after the measuring rod assembly is installed, backfilling the measuring hole; s5, the hoisting device is dismantled; and S6, installing an acquisition instrument device. Through the installation method, automatic installation can be achieved, manual supporting or lifting of the measuring rod assembly is not needed in the whole installation process, and the advantages of saving time and labor and being low in construction difficulty are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of soft soil foundation engineering monitoring, and in particular relates to an installation method of a pore water pressure and stratified settlement comprehensive monitoring device for a soft foundation. 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 existing soft foundation monitoring projects, pore water pressure and stratified settlement need to be drilled and buried separately; for example, stratified settlement is mainly monitored by burying plastic pipes + settlement magnetic rings, and the plastic pipes need to be docked and assembled at the construction site; 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. At present, the monitoring equipment or devices related to pore water pressure and stratified settlement in the existing technology still have the disadvantages of high construction difficulty, inaccurate installation position, and time-consuming and labor-intensive. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an installation method of a comprehensive monitoring device for pore water pressure and stratified settlement of soft foundation.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A method for installing a comprehensive monitoring device for pore water pressure and stratified settlement of a soft foundation, the comprehensive monitoring device comprising a measuring rod device that can be buried underground, a collecting instrument device located on the ground and a hoisting device, the measuring rod device comprising a plurality of measuring rod assemblies connected up and down, the hoisting device being used for hoisting the plurality of measuring rod assemblies; The installation method includes the following steps: S1. Select the installation hole, compact and level the area around the hole, and install the lifting device; S2. According to the hole depth and monitoring depth, select a corresponding number of measuring rod assemblies and pre-install the measuring rod assemblies; S3, hoisting the measuring rod assembly by means of a hoisting device, and lowering the measuring rod assembly into the measuring hole in sequence; wherein, during the lowering process, the upper and lower adjacent measuring rod assemblies are assembled in sequence, and the pore water pressure gauge and the settlement anchor point assembly linked with the wire displacement meter are installed on the corresponding measuring rod assembly; The hoisting device includes a fixed frame, a hoisting assembly, a guide assembly and a support assembly; the hoisting process is as follows: S31, placing the fixed frame corresponding to the measuring hole on the ground; S32, assembling the measuring rod assembly to be lowered onto the hoisting assembly at a high position, and the hoisting assembly moves to a low position under the guidance of the guide assembly to automatically lower the measuring rod assembly into the measuring hole; S33, when the hoisting assembly is in a low position, the measuring rod assembly lowered into the measuring hole is supported by the supporting assembly; then, the hoisting assembly is separated from the measuring rod assembly and returned to a high position; S34, connecting the next measuring rod assembly to be lowered to the measuring rod assembly that has been lowered and is at the top, and assembling the next measuring rod assembly to be lowered to the hoisting assembly at a high position; S35, looping through the above steps S32-S34 until all the measuring rod components are lowered; S4. After the measuring rod assembly is installed, the measuring hole is backfilled; wherein the upper end of the measuring rod assembly located at the top extends above the ground; S5. Remove the lifting device; S6. Install the data collector device on the topmost measuring rod assembly; then, connect the cable of the installed pore water pressure meter to the control panel of the data collector device, connect the linkage rope on the installed settlement anchor assembly to the pull-wire displacement meter in the data collector device, and connect the pull-wire displacement meter to the control panel data in the data collector device.

[0006] Preferably, the hoisting assembly includes a lifting seat and a hoisting member, and the supporting assembly includes a guide supporting seat and a supporting member; In step S33, the support member is in the working position and can support the measuring rod assembly lowered into the measuring hole on the guide support seat and is in a supporting state. At this time, the hanging member is in the non-working position and can be separated from the measuring rod assembly lowered into the measuring hole to allow the lifting seat to rise and return to the high position; In step S34, after the next measuring rod assembly to be lowered is connected to the measuring rod assembly that is already below and at the top, the lifting member switches to the working position to support all the measuring rod assemblies in a lifting state; at this time, the support member switches to the non-working position to allow all the measuring rod assemblies to be lowered under the drive of the lifting seat.

[0007] Preferably, the lifting seat includes a lifting carrier plate and two lifting side plates, the guide support seat includes a support carrier plate and two support side plates, and the lifting carrier plate and the support carrier plate are both provided with avoidance holes for the measuring rod assembly to pass through; The lifting side plate is provided with a transverse lifting hole, through which the lifting member can pass and be supported in the lifting hole; the supporting side plate is provided with a transverse supporting hole, through which the supporting member can pass and be supported in the supporting hole; wherein both the lifting hole and the supporting hole are special-shaped hole structures with a larger top and a smaller bottom, and both the lifting member and the supporting member are rod-shaped structures that form a clearance fit with the special-shaped hole structure; The process of looping through step S35 is as follows: S351, insert the lifting piece horizontally into the upper end of the lifting hole and switch it to the working position; S352, the lifting seat moves upward so that the lifting member is shifted to the lower end of the lifting hole, and the positions of the two measuring rod assemblies do not change during this process; at this time, all the measuring rod assemblies are supported on the lifting member, and the support member no longer carries the measuring rod assemblies; S353, the lifting seat descends and lowers the measuring rod assembly to a position where it can be supported, and the support member is laterally inserted from the upper end of the support hole and switched to the working position. At this time, the support member does not carry the measuring rod assembly; S354, the lifting seat continues to descend until the support member is located at the lower end of the support hole and supported on the support side plate; at this time, all the measuring rod assemblies are supported by the support member, and the hoisting member no longer carries the measuring rod assemblies.

[0008] Preferably, in step S352, the lifting seat continues to move upward for a distance so that the support member moves to the upper end of the support hole and can be freely switched to the non-working position; in step S354, the lifting seat continues to move downward for a distance so that the lifting member moves to the upper end of the lifting hole and can be freely switched to the non-working position, and at this time all the measuring rod components no longer move downward.

[0009] Preferably, the measuring rod assembly includes a connecting structure rod, two limit fixing plates and a plurality of travel protection shells, 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 outer circumference of the connecting structure rod and connected to the limit fixing plates; The pore water pressure gauge is installed on one of the limit fixing plates, the settlement anchor point assembly is sleeved on the outside of the multiple travel protection shells and can slide, and the linkage rope is arranged in the travel protection shell in the measuring rod assembly located above; The connecting structure rod is provided with a plurality of assembly holes which penetrate transversely, and the hoisting parts and the supporting parts can be inserted transversely into the assembly holes to hoist and support one or more measuring rod assemblies.

[0010] Preferably, the linkage rope has multiple sections, and when the two measuring rod assemblies are assembled together, S-shaped buckles are provided between adjacent sections of the linkage rope and are connected by the S-shaped buckles; wherein the S-shaped buckles can slide freely in the travel protection shell.

[0011] Preferably, both ends of the connecting structure rod are provided with connecting convex edges, and the connecting convex edges of adjacent connecting structure rods are butt-plugged and connected; In step S34, the limiting fixing plate at the bottom of the next measuring rod assembly to be lowered is fitted with the limiting fixing plate at the top of the measuring rod assembly that has been lowered, and at the same time, the two connecting convex edges are respectively passed through the center holes of the limiting fixing plates to form an upper and lower plug-in fit, and the two connecting convex edges are connected together using a first fixing member.

[0012] Preferably, in step S34, the corresponding travel protection shells in the upper and lower measuring rod assemblies are kept aligned vertically.

[0013] Preferably, after the two measuring rod assemblies are assembled together in step S34, a geotextile filter cloth is wrapped around the periphery of the two fitted limiting fixing plates.

[0014] Preferably, the comprehensive monitoring device further comprises a supporting device. In step S6, the supporting device is first placed at a designated position, and the collector device installed on the uppermost measuring rod assembly is supported by the supporting device.

[0015] Compared with the prior art, the beneficial effects of the present invention include: The installation method of the pore water pressure and stratified settlement comprehensive monitoring device for soft foundation of the present application can realize automatic installation, and the entire installation process does not require manual support or lifting of the measuring rod assembly, which has the advantages of saving time and labor and low construction difficulty. At the same time, the installation method of the present application can pre-install some modular structures before installation, thereby reducing the time and difficulty of on-site construction operations, and can realize the assembly of multiple pore water pressure gauges and settlement anchor point assemblies during the installation process, which has the advantages of accurate installation position and convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A flowchart of the installation method of the present invention; Figure 2 is an overall diagram of a comprehensive monitoring device in an embodiment of the present invention; Figure 3 It is a three-dimensional diagram of the lifting device; Figure 4 An illustration of the lifting process Figure 1 ; Figure 5 An illustration of the lifting process Figure 2 ; Figure 6 A structural diagram of the connection between two measuring rod assemblies; Figure 7 for Figure 6 An enlarged schematic diagram of the part marked A; Figure 8 It is a schematic diagram of the structural decomposition of the end of the measuring rod assembly; Fig. 9 Schematic diagram of the connection process of two measuring rod components Figure 1 ; Fig.10 Schematic diagram of the connection process of two measuring rod components Figure 2 ; Fig.11 A three-dimensional diagram of connecting structural rods; Fig.12 It is a three-dimensional diagram of the limit fixing plate; Fig.13 It is a top view of the limit fixing plate; Fig.14 for Fig.13 An enlarged schematic diagram of the part marked B; Fig.15 It is a schematic diagram of the first structure of the end of the travel protection shell; Fig.16 It is a schematic diagram of the second structure of the end of the travel protection shell; Fig.17 It is the state diagram of the settlement anchor component; Fig.18 It is a structural diagram of the collector device; Fig.19 It is an exploded view of the collector device; Fig. 20 This is the installation diagram of the wire-type displacement meter; Fig.21 for Fig. 20 A three-dimensional cross-sectional view of Fig. 22 A three-dimensional diagram of the supporting device. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] The installation method of the embodiment of the present invention is specifically an installation method of a comprehensive monitoring device for pore water pressure and stratified settlement of soft foundation; the comprehensive monitoring device includes a measuring rod device 10 that can be buried underground, a collecting instrument device 20 located on the ground, a supporting device 40 and a hoisting device 50; Figure 2 As shown, the measuring rod device 10 is specifically buried in an underground measuring hole, and includes a plurality of measuring rod assemblies connected up and down. The hoisting device 50 is used to hoist the plurality of measuring rod assemblies and sequentially lower the measuring rod assemblies into the measuring hole. The collector device 20 is installed on the ground through the supporting device 40.

[0021] The installation method of the embodiment is as follows Figure 1 As shown, it specifically includes the following steps: S1, select and install the measuring hole, compact and level the periphery of the measuring hole, and install the lifting device 50; S2. According to the hole depth and monitoring depth, select a corresponding number of measuring rod assemblies and pre-install the measuring rod assemblies; S3, hoisting the measuring rod assembly by the hoisting device 50, and lowering the measuring rod assembly into the measuring hole in sequence; wherein, during the lowering process, the upper and lower adjacent measuring rod assemblies are assembled in sequence, and the pore water pressure gauge and the settlement anchor point assembly 30 linked with the wire displacement meter 21 are installed on the corresponding measuring rod assembly; S4. After the measuring rod assembly is installed, the measuring hole is backfilled; wherein the upper end of the measuring rod assembly located at the top extends above the ground; S5, dismantling the lifting device 50; S6. First, place the support device 40 at the designated position of the corresponding measuring hole, install the collector device 20 on the uppermost measuring rod assembly and support it through the support device 40; then, connect the cable of the installed pore water pressure meter to the control panel 24 of the collector device 20, connect the linkage rope 23 on the installed settlement anchor point assembly 30 to the pull-wire displacement meter in the collector device 20, and the pull-wire displacement meter is connected to the control panel data in the collector device 20.

[0022] like Figure 3 As shown, the hoisting device 50 includes a fixed frame 51, a hoisting assembly 52, a guide assembly 53 and a support assembly 54; the fixed frame 51 preferably adopts a profile frame structure, which is vertically placed on the ground layer of the test point. Preferably, the fixed frame 51 can be fixed to the ground layer of the test point by means such as bolts; the hoisting assembly 52 can be raised and lowered, and is mainly used to automatically lower each measuring rod assembly into the measuring hole in sequence, the guide assembly 53 is mainly used to guide the lowering process of the measuring rod assembly, and the support assembly 54 is mainly used to support and carry one or more measuring rod assemblies that have been lowered into the measuring hole, and provide support for the lowered measuring rod assembly when the hoisting assembly 52 is connected to a new measuring rod assembly to be lowered.

[0023] The lifting assembly 52 includes a lifting seat 521 and a lifting member 522. The lifting seat 521 includes a lifting carrier plate 5211 and two lifting side plates 5212. The two lifting side plates 5212 and the lifting carrier plate 5211 form a U-shaped structure with the opening facing downward. The lifting carrier plate 5211 is provided with an avoidance hole for the measuring rod assembly to pass through. The lifting side plates 5212 are provided with a transverse lifting hole 5213. The lifting member 522 can pass through the lifting hole 5213 and be supported in the lifting hole 5213. Similarly, The support assembly 54 includes a guide support seat 541 and a support member 542. The guide support seat 541 includes a support carrier plate 5411 and two support side plates 5412. The two support side plates 5412 and the support carrier plate 5411 form a U-shaped structure with an opening facing downward. The support carrier plate 5411 is also provided with an avoidance hole 543 for the measuring rod assembly to pass through. The support side plates 5412 are provided with a transverse support hole 544. The support member 542 can pass through the support hole 544 and be supported in the support hole 544.

[0024] For example, the hoisting assembly 52 also includes a driving unit 523, which is preferably a screw driving unit, and its stroke is specifically set to be no less than the length of a single measuring rod unit. The guide assembly 53 includes at least one guide rod 531, which is vertically mounted on the fixed frame 51, and the lifting seat 521 and the guide rod 531 are slidably matched and can be lifted and lowered under the drive of the driving unit 523.

[0025] Please combine Figure 4-5 In the embodiment, the hoisting process of step S3 is as follows: S31, placing the fixed frame 51 corresponding to the measuring hole on the ground; S32, assembling the measuring rod assembly to be lowered onto the hoisting assembly 52 at a high position, and the hoisting assembly 52 moves to a low position under the guidance of the guide assembly 53 to automatically lower the measuring rod assembly into the measuring hole; S33, when the hoisting assembly 52 is in a low position, the measuring rod assembly lowered into the measuring hole is supported by the supporting assembly 54; then, the hoisting assembly 52 is separated from the measuring rod assembly and returned to a high position; S34, connecting the next measuring rod assembly to be lowered to the measuring rod assembly that has been lowered and is at the top, and assembling the next measuring rod assembly to be lowered to the hoisting assembly 52 at a high position; S35. Execute the above steps S32-S34 in a loop until all measuring rod components are lowered.

[0026] Expanded, in step S33, the support member 542 is in the working position and can support the measuring rod assembly lowered into the measuring hole on the guide support seat 541 and is in a supporting state. At this time, the hanging member 522 is in the non-working position and can be separated from the measuring rod assembly lowered into the measuring hole to allow the lifting seat 521 to rise and return to a high position; in step S34, after the next measuring rod assembly to be lowered is connected with the measuring rod assembly that is already below and at the top, the hanging member 522 switches to the working position to be able to support all the measuring rod assemblies and is in a hanging state; at this time, the support member 542 switches to the non-working position to allow all the measuring rod assemblies to be lowered under the drive of the lifting seat 521.

[0027] In the embodiment, the hanging hole 5213 and the supporting hole 544 are both special-shaped hole structures that are larger at the top and smaller at the bottom. The hanging member 522 and the supporting member 542 are both rod-shaped structures (specifically round rods) that form a clearance fit with the special-shaped hole. This helps to avoid stress contact during the hanging process that may cause the hanging member 522 and the supporting member 542 to be difficult to remove. Accordingly, the upper end aperture of the special-shaped hole structure is set to be slightly larger than the aperture of the assembly hole 114 in the measuring rod assembly, and the lower end aperture is set to be the same as the aperture of the assembly hole 114 or slightly larger than the aperture of the assembly hole 114. In order to keep the support member 542 and the hanging member 522 stable when carrying the measuring rod assembly without shaking, in the embodiment, the support member 542 and the hanging member 522 are both set to two, and correspondingly, there are four matching assembly holes 114 in the measuring rod assembly (see attached). Fig.11 ).

[0028] Further expanded, the specific process of looping step S35 is as follows: S351, insert the lifting member 522 horizontally into the upper end of the lifting hole 5213 and switch it to the working position; S352, the lifting seat 521 moves upward so that the hanging member 522 is shifted to the lower end of the hanging hole 5213, and the positions of the two measuring rod assemblies do not change during this process; at this time, all the measuring rod assemblies are supported on the hanging member 522, and the support member 542 no longer carries the measuring rod assemblies; preferably, in step S352, the lifting seat 521 continues to move upward for a distance so that the support member 542 moves to the upper end of the support hole 544 and can be freely switched to the non-working position; S353, the lifting seat 521 descends and lowers the measuring rod assembly to a position where it can be supported, and the support member 542 is laterally inserted from the upper end of the support hole 544 and switched to the working position. At this time, the support member 542 does not support the measuring rod assembly; S354, the lifting seat 521 continues to descend until the support member 542 is located at the lower end of the support hole 544 and is supported on the support side plate 5412; at this time, all the measuring rod assemblies are supported by the support member 542, and the hanging member 522 no longer supports the measuring rod assemblies; preferably, in step S354, the lifting seat 521 continues to move downward for a distance so that the hanging member 522 moves to the upper end of the hanging hole 5213 and can be freely switched to the non-working position, and at this time all the measuring rod assemblies no longer move downward.

[0029] Combine the following Figure 4-5 Taking two measuring rod assemblies as an example, the hoisting process of one cycle is introduced again.

[0030] Figure 4 It is an assembly operation to connect two measuring rod components together: Figure 4 As shown in a in the figure, the measuring rod assembly at the bottom is supported by two supporting members 542. At this time, other measuring rod assemblies can be assembled above the measuring rod assembly supported by the supporting member 542, and the lifting seat 521 is moved to a relatively high position and hoisted by two hanging members 522. At this time, since the measuring rod assembly at the bottom is supported by the supporting member 542 (the supporting member 542 is pressed against the supporting side plate 5412), the process of pulling out the supporting member 542 is relatively difficult. Correspondingly, in the above process, the insertion of the hanging member 522 is smooth because it is basically not affected by gravity.

[0031] Then, if Figure 4 As shown in b, the lifting seat 521 moves upward under the drive of the driving unit 523 so that the lifting seat 521 is lifted compared to the hanging member 522, and then the hanging member 522 moves to the lower end of the hanging hole 5213. At this time, the positions of the two measuring rod assemblies do not change.

[0032] Then, if Figure 4 As shown in c, driven by the driving unit 523, the lifting seat 521 continues to move upward to carry and lift the two measuring rod assemblies as a whole, so that the measuring rod assembly located below is lifted a short distance (a small distance), and driven by the measuring rod assembly, the two supporting members 542 are lifted and moved upward and shifted to the upper end of the supporting hole 544. At this time, the supporting member 542 no longer carries the two measuring rod assemblies and can be smoothly pulled out of the supporting hole 544 without hindrance. Specifically, the above Figure 4 b in Figure 4 The action process of c is continuous.

[0033] Figure 5 It is the operation of lowering the two measuring rod assemblies together: Figure 5As shown in a in FIG. 1 , the two measuring rod assemblies are carried by the hanging member 522. When the two measuring rod assemblies are lowered to a relatively low position under the drive of the driving unit 523, the two measuring rod assemblies are supported on the two hanging members 522. Figure 5 When the position is as shown in a in FIG. 1 , the two groups of support holes 544 are flush with the two assembly holes 114 located below in the measuring rod assembly. At this time, the two support members 542 can be smoothly inserted into the support holes 544 and the assembly holes 114.

[0034] Then, if Figure 5 As shown in b, the lifting seat 521 and the two measuring rod assemblies continue to move downward under the driving of the driving unit 523, so that the supporting member 542 is shifted to the lower end of the supporting hole 544, so that the two measuring rod assemblies are supported by the supporting member 542 and the hanging member 522; Then, the lifting seat 521 continues to move downward for a short distance. Figure 5 As shown in c in FIG. 5 , under the support of the support member 542, the two measuring rod assemblies are supported by the support member 542 and no longer move downward. At this time, the lifting seat 521 is displaced relative to the two measuring rod assemblies so that the hanging member 522 no longer bears the gravity of the two measuring rod assemblies, and the hanging member 522 can be smoothly pulled out of the hanging hole 5213 without hindrance. Figure 5 b in Figure 5 The action process of c in is preferably performed continuously.

[0035] It should be noted here that in some scenarios, the measuring hole will be filled with a relative amount of water. During the lowering process, the measuring rod assembly will not only be affected by its own gravity, but also by buoyancy. The influence of buoyancy will be greater as the depth of the measuring hole increases. Therefore, the drive unit 523 not only needs to provide a lifting effect, but also preferably has a self-locking function to provide a continuous downward pressure force. Preferably, the drive unit 523 is specifically a screw drive unit or other linear drive unit with a reducer, so as to maintain the accuracy, stability and continuity of the depth below during the lowering process. Preferably, the fixed frame 51 itself also has a large weight, which further improves the stability of the overall structure.

[0036] To facilitate understanding of the installation method of the embodiment of the present invention, the specific structure of the comprehensive monitoring device in the embodiment is introduced below. Among them, the measuring rod device 10 is mainly used to carry the sensor for testing and the matching kit linked with the sensor, etc., and the collector device 20 is mainly used to provide the sensor and collect and transmit the monitoring data of the sensor. 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.

[0037] The measuring rod device 10 adopts a modular structure, which includes a plurality of measuring rod assemblies that can be assembled and connected together. Different 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 2 and Figure 6 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.

[0038] like Figure 6 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.

[0039] 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.

[0040] like Figure 6-8 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 on the 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 the travel protection shells 13 does not exceed ten.

[0041] 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. Figure 9-11 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 corresponding two ends of the connecting structure rods 11 connected end to end are inserted together so that the first connecting holes 112 on the connecting flange 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.

[0042] The connecting structure rod 11 is preferably a polygonal rod, specifically a regular polygonal rod; please continue to refer to Fig.11 In 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.

[0043] like Fig.12 As shown, a center hole 121 that matches the contour shape 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 that extends radially 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, and the limiting fixing disk 12 is fixedly installed on the connecting structure rod 11 by the fixing bolt.

[0044] 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 9-10As 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.

[0045] 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. Fig.12 As shown, the limiting fixing plate 12 is provided with a mounting hole 123 located beside the central hole 121. 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.

[0046] 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. 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, there are two second fixing holes 124, and the two second fixing holes 124 are symmetrically arranged compared to the mounting hole 123; wherein, both second fixing holes 124 are provided with locking screws.

[0047] During on-site construction, the cables of the pore water pressure gauges need to be buried in the on-site measuring holes. In order to keep the cables of multiple pore water pressure gauges neat and avoid interference with the hole wall 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 Fig.12 , 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.

[0048] 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 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.

[0049] 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.

[0050] Please refer again Figure 6-8 and Fig.12, the specific connection structure between the stroke protection shell 13 and the limiting fixed disk 12 is as follows: a plurality of third fixing holes 126 are provided on the circumference of the limiting fixed disk 12, 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.

[0051] At present, the settlement of soft soil foundation projects in the Pearl River Delta region 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 equipped 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.

[0052] 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.

[0053] In order to achieve smooth sliding of the settlement anchor assembly 30 on different measuring rod assemblies, Figure 12-14 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.

[0054] 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 Fig.12The third fixing hole 126 is in a stepped shape in the up and down directions, and includes an upper hole section 1261 and a lower hole section 1262, wherein the upper hole section 1261 is semicircular in projection on the horizontal plane, and the lower hole section 1262 is in an arc shape, 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.

[0055] like Fig.15 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.

[0056] 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.

[0057] 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.

[0058] like Figure 6 and Fig.17 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.

[0059] 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.

[0060] Specifically, the linkage rope 23 is a steel wire rope, which can be buried in soft soil for a long time. For ease of installation, the linkage rope 23 in the embodiment preferably has multiple sections, and when the two measuring rod assemblies are assembled together, the adjacent sections of the linkage rope 23 are connected by S-shaped buckles.

[0061] In step S34 of the embodiment, the limiting fixing disk at the bottom of the next measuring rod assembly to be lowered is fitted with the limiting fixing disk at the top of the measuring rod assembly that has been lowered, and the two connecting convex edges are respectively passed through the central holes of the limiting fixing disks to form an upper and lower plug-in fit, and the two connecting convex edges are connected together by a first fixing member. At the same time, in step S34, the corresponding travel protection shells in the upper and lower measuring rod assemblies are also kept aligned up and down. Optionally, after the two measuring rod assemblies are assembled together in step S34, the geotextile filter cloth is wrapped around the periphery of the two fitted limiting fixing disks.

[0062] The acquisition instrument device 20 also includes an acquisition housing 22, 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 acquired data of the control board 24 is transmitted to the back-end platform (software platform or host computer platform) through the data transmission module. Among them, the power module 25 uses, for example, a lithium battery to provide a long-term power supply to the control board 24, the data transmission module and other components.

[0063] Figure 18-21 As shown, the acquisition shell 22 includes a first shell 221, a second shell 222 and an intermediate connecting tube 223, wherein the intermediate connecting tube 223 is located in the middle of the first shell 221 and the second shell 222; wherein the first shell 221 is located at the lower part of the intermediate connecting tube 223, which 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 shell 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 shell 221 to pass through the second shell 222.

[0064] like Fig.19 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.

[0065] 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 wire-drawing displacement meter 21, such as Figure 20-21 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 travel protection shells 13 and connected with the linkage rope 23. Among them, multiple wire-drawing displacement meters 21 are preferably distributed along the same circumference and fixed to the bottom plate 2211 through the L-shaped connecting plate 27.

[0066] The bottom plate 2211 is preferably provided with a lifting block 28, 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 fixedly mounted to the upper surface 281 of the lifting block 28, and can support the pulley 261 while achieving the avoidance of the outlet hole 2214 in the vertical direction, and finally maintaining the smooth sliding of the outlet end of the cable displacement meter 21 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 outlet rope section of the cable 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 cable displacement meter 21 more compact.

[0067] 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.

[0068] 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 through holes 2223 are provided in the middle of the mounting plate 2221, and a waterproof plug (not shown in the figure) that can pass the line is provided at the through hole 2223, thereby ensuring the waterproofness of the second accommodation cavity.

[0069] 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.

[0070] 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.

[0071] An exemplary structure of the support device 40 is as follows: Fig. 22 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.

[0072] A plurality of support rods 43 are fixed to the support seat 41 by fixing nuts 44. When in use, first install some or all of the support rods 43 to the support seat 41, then pre-embed the lower end of the support rod 43 to the ground layer position of the test point to form positioning and guidance; then, lower the measuring rod assembly in the measuring rod device 10 from the matching through hole 45 in sequence until it is fully installed; finally, support the collector device 20 on the support column 42, and the installation is completed.

[0073] In summary, the advantages of the embodiments of the present invention are as follows: 1. The installation process of the measuring rod device is reasonably arranged, and the measuring rod components can be pre-assembled in advance, which can facilitate the transportation and assembly of various components and improve the assembly efficiency; 2. The measuring rod device is buried to different depths through the lifting device, and the combined installation of any measuring depth can be realized according to the requirements of different depths of different projects; 3. Compared with the traditional stratified sedimentation magnetic ring, the installation method of connecting the pull-wire displacement meter with the linkage rope avoids the problem of measurement interruption caused by the magnetic ring descending out of the measuring range of the magnetic sensor. At the same time, the installation method of the embodiment of the present application is more convenient and quick, and can realize long-term continuous monitoring of stratified sedimentation.

[0074] 4. The lifting device of the embodiment of the present application not only provides a lifting effect, but also has a self-locking function and can provide a continuous downward pressure force, thereby maintaining the accuracy, stability and continuity of the depth below the measuring rod device during the lowering process.

[0075] 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. A method for installing a comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation, characterized in that: The comprehensive monitoring device comprises a measuring rod device that can be buried underground, a collecting instrument device located on the ground, and a hoisting device, wherein the measuring rod device comprises a plurality of measuring rod assemblies connected up and down, and the hoisting device is used to hoist the plurality of measuring rod assemblies; The installation method includes the following steps: S1. Select the installation hole, compact and level the area around the hole, and install the lifting device; S2. According to the hole depth and monitoring depth, select a corresponding number of measuring rod assemblies and pre-install the measuring rod assemblies; S3, hoisting the measuring rod assembly by means of a hoisting device, and lowering the measuring rod assembly into the measuring hole in sequence; wherein, during the lowering process, the upper and lower adjacent measuring rod assemblies are assembled in sequence, and the pore water pressure gauge and the settlement anchor point assembly linked with the wire displacement meter are installed on the corresponding measuring rod assembly; The hoisting device includes a fixed frame, a hoisting assembly, a guide assembly and a support assembly; the hoisting process is as follows: S31, placing the fixed frame corresponding to the measuring hole on the ground; S32, assembling the measuring rod assembly to be lowered onto the hoisting assembly at a high position, and the hoisting assembly moves to a low position under the guidance of the guide assembly to automatically lower the measuring rod assembly into the measuring hole; S33, when the hoisting assembly is in a low position, the measuring rod assembly lowered into the measuring hole is supported by the supporting assembly; then, the hoisting assembly is separated from the measuring rod assembly and returned to a high position; S34, connecting the next measuring rod assembly to be lowered to the measuring rod assembly that has been lowered and is at the top, and assembling the next measuring rod assembly to be lowered to the hoisting assembly at a high position; S35, looping through the above steps S32-S34 until all the measuring rod components are lowered; S4. After the measuring rod assembly is installed, the measuring hole is backfilled; wherein the upper end of the measuring rod assembly located at the top extends above the ground; S5. Remove the lifting device; S6. Install the data collector device on the topmost measuring rod assembly; then, connect the cable of the installed pore water pressure meter to the control panel of the data collector device, connect the linkage rope on the installed settlement anchor assembly to the pull-wire displacement meter in the data collector device, and connect the pull-wire displacement meter to the control panel data in the data collector device.

2. The method for installing the comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation according to claim 1, characterized in that: The hoisting assembly includes a lifting seat and a hoisting member, and the supporting assembly includes a guide supporting seat and a supporting member; In step S33, the support member is in the working position and can support the measuring rod assembly lowered into the measuring hole on the guide support seat and is in a supporting state. At this time, the hanging member is in the non-working position and can be separated from the measuring rod assembly lowered into the measuring hole to allow the lifting seat to rise and return to the high position; In step S34, after the next measuring rod assembly to be lowered is connected to the measuring rod assembly that is already below and at the top, the lifting member switches to the working position to support all the measuring rod assemblies in a lifting state; at this time, the support member switches to the non-working position to allow all the measuring rod assemblies to be lowered under the drive of the lifting seat.

3. The method for installing the comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation according to claim 2, characterized in that: The lifting seat includes a lifting carrier plate and two lifting side plates, the guide support seat includes a supporting carrier plate and two supporting side plates, and both the lifting carrier plate and the supporting carrier plate are provided with avoidance holes for the measuring rod assembly to pass through; The lifting side plate is provided with a transverse lifting hole, through which the lifting member can pass and be supported in the lifting hole; the supporting side plate is provided with a transverse supporting hole, through which the supporting member can pass and be supported in the supporting hole; wherein both the lifting hole and the supporting hole are special-shaped hole structures with a larger top and a smaller bottom, and both the lifting member and the supporting member are rod-shaped structures that form a clearance fit with the special-shaped hole structure; The process of looping through step S35 is as follows: S351, insert the lifting piece horizontally into the upper end of the lifting hole and switch it to the working position; S352, the lifting seat moves upward so that the lifting member is shifted to the lower end of the lifting hole, and the positions of the two measuring rod assemblies do not change during this process; at this time, all the measuring rod assemblies are supported on the lifting member, and the support member no longer carries the measuring rod assemblies; S353, the lifting seat descends and lowers the measuring rod assembly to a position where it can be supported, and the support member is laterally inserted from the upper end of the support hole and switched to the working position. At this time, the support member does not carry the measuring rod assembly; S354, the lifting seat continues to descend until the support member is located at the lower end of the support hole and supported on the support side plate; at this time, all the measuring rod assemblies are supported by the support member, and the hoisting member no longer carries the measuring rod assemblies.

4. The method for installing the comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation according to claim 3, characterized in that: In step S352, the lifting seat continues to move upward for a distance so that the support member moves to the upper end of the support hole and can be freely switched to the non-working position; in step S354, the lifting seat continues to move downward for a distance so that the lifting member moves to the upper end of the lifting hole and can be freely switched to the non-working position. At this time, all the measuring rod components no longer move downward.

5. The method for installing the comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation according to claim 2, characterized in that: The measuring rod assembly includes a connecting structure rod, two limit fixing plates and a plurality of travel protection shells. The two limit fixing plates are respectively installed at the upper and lower ends of the connecting structure rod. The plurality of travel protection shells are distributed at intervals on the outer circumference of the connecting structure rod and connected to the limit fixing plates. The pore water pressure gauge is installed on one of the limit fixing plates, the settlement anchor point assembly is sleeved on the outside of the multiple travel protection shells and can slide, and the linkage rope is arranged in the travel protection shell in the measuring rod assembly located above; The connecting structure rod is provided with a plurality of assembly holes which penetrate transversely, and the hoisting parts and the supporting parts can be inserted transversely into the assembly holes to hoist and support one or more measuring rod assemblies.

6. The method for installing the pore water pressure and stratified settlement comprehensive monitoring device for soft foundation according to claim 5, characterized in that: The linkage rope has multiple sections. When the two measuring rod assemblies are assembled together, S-shaped buckles are provided between the linkage ropes of adjacent sections and connected by the S-shaped buckles; wherein the S-shaped buckles can slide freely in the travel protection shell.

7. The method for installing the comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation according to claim 5, characterized in that: Both ends of the connecting structure rod are provided with connecting convex edges, and the connecting convex edges of adjacent connecting structure rods are butt-plugged and connected; In step S34, the limiting fixing plate at the bottom of the next measuring rod assembly to be lowered is fitted with the limiting fixing plate at the top of the measuring rod assembly that has been lowered, and at the same time, the two connecting convex edges are respectively passed through the center holes of the limiting fixing plates to form an upper and lower plug-in fit, and the two connecting convex edges are connected together using a first fixing member.

8. The method for installing the comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation according to claim 7, characterized in that: In step S34, the corresponding travel protection shells in the upper and lower measuring rod assemblies are kept aligned vertically.

9. The method for installing the pore water pressure and stratified settlement comprehensive monitoring device for soft foundation according to claim 7, characterized in that: In step S34, after the two measuring rod assemblies are assembled together, the geotextile filter cloth is wrapped around the outer periphery of the two fitted limiting fixing plates.

10. The method for installing the comprehensive monitoring device for pore water pressure and stratified settlement for soft foundation according to claim 1, characterized in that: The comprehensive monitoring device also includes a supporting device. In step S6, the supporting device is first placed at a designated position, and the collector device installed on the uppermost measuring rod assembly is supported by the supporting device.

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