Device for measuring settlement of super-thick concrete foundation slab of super high-rise building and maintenance method

Abstract

The invention discloses a settlement measuring device for a super-thick concrete foundation slab of a super-high-rise building and an overhauling method. Each measuring module of the device is connected with a liquid storage tank in series through a plurality of sections of liquid conveying pipes to form a loop; each measuring module is connected in series with the electric control box through a plurality of sections of cables; the device further comprises a protection box, a protection tube and a pull rod. The infusion tube and the cable are contained in the protection tube at the same section. The measuring modules are located in the corresponding protection boxes, and the protection boxes are provided with maintenance pipes communicated to the top face of the foundation bottom plate. The method is characterized in that a suspected fault measurement module is pulled out of a maintenance pipe for replacement by using a pull rod; or the two measuring modules are pulled out, and the reinforcing line pipe, the infusion pipe and the cable between the two measuring modules are detached; then tying a new section of pipeline at one end of the old reinforced pipeline; pulling the old reinforcing line pipe and threading a new reinforcing line pipe at the same time; and then the newly-reinforced line pipe is in butt joint with the two pulled-out measuring modules. According to the device and method, intervention can be conducted in advance, the settlement amount of bottom plate pouring is prevented from being omitted, and overhauling is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of super high-rise building construction, in particular to a super high-rise building ultra-thick concrete foundation bottom plate settlement measuring device and a maintenance method for the settlement measuring device. Background Art

[0002] During the construction of high-rise buildings, it is necessary to continuously monitor their settlement over a period of time. The actual settlement of the building, such as 88mm, is measured and subtracted from the expected settlement of the building, such as 80mm, to obtain the actual deviation value of the building, such as 8mm. This is then compared with the allowable deviation value of plus or minus 10mm specified in the specifications to ensure that the actual deviation value does not exceed the allowable deviation value and meets the safety specifications of the building. Currently, the industry often uses levels or total stations to measure settlement, but levels or total stations have large measurement errors and require workers to manually measure point by point, which is time-consuming, labor-intensive, and has low accuracy. Therefore, the industry also hopes to use hydraulic settlement meters with higher accuracy and automated measurement to measure building settlement.

[0003] The instrument of the hydraulic settlement meter itself belongs to a very mature existing technology. It includes a liquid storage tank, multiple measuring modules and an electrical control box, and the electrical control box is equipped with a collector and a main controller; the liquid storage tank and the electrical control box are both installed in a permanent area outside the settlement area, that is, an area independent of the building and not subject to relative settlement with the building, such as a fixed road surface far away from the foundation pit of the building, and the measuring modules in series are installed in the settlement area and settle synchronously with the building; each measuring module is connected in series with the liquid storage tank via multiple sections of infusion pipes to form a loop; each measuring module is connected in series with the electrical control box via multiple sections of cables; each measuring module is equipped with a sensing membrane and a full-bridge silicon chip. When the measuring module at any point settles, the height difference between the module and the liquid storage tank will change, causing the pressure of the module's sensing membrane to change, thereby causing the full-bridge silicon chip to deform and generate an electrical signal, and the electrical signal is transmitted to the electrical control box collector via the cable, so that the settlement change at that point can be measured.

[0004] Each measurement module also has a shutoff valve, which is connected to the main controller's signal. If the pressure in a module drops suddenly, it indicates that the module itself has failed or the subsequent section of the infusion tubing is leaking. The main controller will directly shut off the shutoff valve of the faulty module to prevent the fault from spreading to other subsequent modules. Workers can then fix the problem by replacing the faulty module or the section of infusion tubing following the faulty module.

[0005] To facilitate installation and subsequent maintenance, the industry currently waits until the building's floor-by-floor concrete has been poured above ground level before fixing the hydraulic settlement meter's measurement modules to the building's exterior walls above ground level. This approach presents little problem for settlement detection in ordinary buildings of normal height, as the foundation slab (the slab at the bottom of the foundation pit) is relatively thin, typically 0.6-1.2 meters. The amount of concrete poured in the slab is relatively small, its weight is light, and there is almost no settlement during the pouring process. Therefore, installing the measurement modules for settlement detection after the underground structure within the foundation pit is completed and the building itself is above ground level has little impact. However, for super-tall buildings over 300 meters tall, such as the 409-meter Ningbo Center Tower, existing settlement detection devices have significant limitations. Because the thickness of the foundation slab of a super high-rise building reaches 3-6 meters, the pouring volume is large, and the deadweight is also large, a certain amount of settlement, such as 2-3mm, will occur in the early stage of the slab pouring process. At this time, the building has not yet emerged from the ground, and the various measurement modules of the hydraulic settlement meter have not yet been installed. This results in the settlement amount during the foundation slab pouring process being missed, resulting in the actual error value being 2-3mm smaller, which does not meet the requirements of safety regulations. This part of the settlement that was not included in the accumulated settlement value in the early stage will affect the accuracy of the measurement result judgment, which is a measurement error and a measurement defect. The data processing is not rigorous, scientific, and reliable, and there are structural safety hazards such as cracking, tilting of the main structure, and even collapse. Summary of the Invention

[0006] A technical problem to be solved by the present invention is to provide a settlement measuring device for ultra-thick concrete foundation slabs of super-high-rise buildings, which can detect the settlement of the basement concrete slabs of super-high-rise buildings in advance, avoid missing the settlement of this part of the slab pouring, and is easy to maintain.

[0007] A technical solution of the present invention is to provide a settlement measuring device for ultra-thick concrete foundation slabs of super-high-rise buildings, which includes a liquid storage tank, n measuring modules and an electric control box, wherein the electric control box is provided with a collector and a main controller; the liquid storage tank and the electric control box are both installed in a permanent area; each measuring module is connected in series with the liquid storage tank via multiple sections of liquid delivery pipes to form a loop; each measuring module is connected in series with the electric control box via multiple sections of cables; each measuring module is provided with a sensing membrane, a full-bridge silicon chip and a shut-off valve; the settlement measuring device also includes n protection boxes and n-1 middle-section protection tubes for resisting pouring pressure, each middle-section protection tube is fixed between two adjacent protection boxes, and the protection boxes and the middle-section protection tubes are both pre-buried at the bottom of the foundation slab; the front end of the first protection box is provided with a front-section protection tube extending to the permanent area, and the rear end of the last protection box is provided with a rear-section protection tube extending to the permanent area; each section of the liquid delivery pipe and the cable at the same section are accommodated in the protection tube at the same section;

[0008] Each measuring module is snap-fitted into the bayonet inside the corresponding protective box, and each protective box is provided with a maintenance pipe connected from the box body to the top surface of the foundation slab; the settlement measuring device also includes a pull rod for temporarily connecting the measuring module so as to pull the measuring module out of the bayonet and pull it out of the foundation slab along the maintenance pipe; the infusion tube and cable of each section are left with a length margin for the corresponding measuring module to be pulled out of the foundation slab.

[0009] Another technical problem to be solved by the present invention is to provide a method for inspecting and maintaining a settlement measuring device for an ultra-thick concrete foundation slab of a super-high-rise building that is easy to inspect and maintain.

[0010] Another technical solution of the present invention is to provide a method for inspecting and repairing a settlement measuring device for an ultra-thick concrete foundation slab of a super high-rise building, which comprises the following steps:

[0011] When the pressure drop shut-off valve of a measurement module is disconnected, a worker standing on the foundation floor holds a pull rod and lowers it along the corresponding maintenance pipe to temporarily connect it to the measurement module. The worker then pulls the measurement module upward and out of the top of the maintenance pipe. The worker replaces the measurement module. If the fault disappears, the maintenance is complete.

[0012] If there is still a fault, it means that the fault occurs in a section of pipeline on the rear side of the measuring module, so use the pull rod to pull the next measuring module from the next maintenance pipe out of the foundation base plate, and remove the reinforcement wire pipe between the two pulled-out measuring modules and the infusion pipe and cable wrapped inside it; then tie one end of a new section of reinforcement wire pipe containing infusion pipe and cable line to one end of the removed old reinforcement wire pipe; then pull the old reinforcement wire pipe from the other end, pull the old reinforcement wire pipe out from the bottom of the basement and complete the threading of the new reinforcement wire pipe at the same time; then connect the two ends of the new reinforcement wire pipe, infusion pipe and cable line to the two pulled-out measuring modules; finally, use the pull rod to lower the two measuring modules along their respective maintenance pipes one after another, so that the two measuring modules are re-stuck in the bayonet of their respective protection boxes.

[0013] Compared with the existing technology, the above settlement measuring device and maintenance method have the following advantages.

[0014] The above technical solution mainly solves two problems. First, the various measurement modules and related pipelines are creatively placed in the concrete cushion layer. In other words, they are pre-buried in the concrete at the bottom of the foundation slab, and the protective box and protective tube effectively resist the pressure of concrete pouring, ensuring the working stability of the settlement measurement device. This solves the problem of how to lay the measurement device under the ultra-thick foundation slab of 3-6 meters. Moreover, since the settlement device is laid before the foundation slab is poured, it can intervene in the measurement process in advance, so the settlement of the foundation slab during the early pouring process can be fully detected, eliminating the early errors and making up for the detection defects of this part of the settlement. It improves the accuracy of the detection and judgment of the total settlement of high-rise buildings, and the data processing is more scientific, rigorous and reliable.

[0015] Secondly, each measuring module and related pipeline are buried deep under the foundation slab. After years of disrepair, replacement and maintenance are difficult. However, this application cleverly arranges vertical maintenance pipes and sets up a temporary connection structure between the measuring module and the pull rod, so that workers can easily remove the suspected faulty measuring module from the foundation slab along the maintenance pipe, making it convenient for workers standing on the foundation slab to replace the faulty module; moreover, the infusion pipes and cables at each section are wrapped with reinforced wire pipes, which not only protect the relatively fragile infusion pipes in normal times and reduce their failure rate, but also continue to protect the infusion pipes when the measuring module is pulled during maintenance to avoid damage and leakage caused by pulling; furthermore, the new and old reinforced wire pipes are tied together end to end. During the process of removing the old reinforced wire pipes, the new pipeline is pulled along the path of the next maintenance pipe, the next protection box, the middle protection pipe, the previous protection box, and the previous maintenance pipe through the foundation slab, easily completing the wiring of the new pipeline under the foundation slab, further facilitating the maintenance and line replacement process, and solving the problem of repairing the measuring device located under the ultra-thick foundation slab.

[0016] Moreover, the above-mentioned measurement modules and corresponding pipelines are reasonably arranged and buried under the bottom of the foundation slab to avoid exposure on the top surface of the slab. In this way, it will not affect the normal use of the basement, prevent people and vehicles from accidentally touching and damaging the settlement measurement device during construction, and avoid the situation where one of the series-connected measurement modules is damaged and causes the entire system to fail.

[0017] Preferably, each section of the infusion tube is wrapped with a section of reinforced wire tube, and the cable at the same section is also wrapped in the reinforced wire tube; each reinforced wire tube is provided with ear plates at both ends, each measuring module is provided with screws at the front and rear ends, and screws are provided near the discharge pipe joint and the return pipe joint of the liquid storage tank; the front ear plate of the first section of reinforced wire tube is screwed to the screw near the discharge pipe joint of the liquid storage tank, the rear ear plate of the first section of reinforced wire tube is screwed to the front screw of the first measuring module, the ear plates at both ends of each middle section of reinforced wire tube are screwed to the rear screw of the front measuring module and the front screw of the rear measuring module respectively, and the front ear plate of the last section of reinforced wire tube is screwed to the rear screw of the last measuring module. Screw connection: the rear end ear plate of the last section of reinforced wire pipe is screwed to the screw near the return pipe joint of the liquid storage tank; the front end of the first section of reinforced wire pipe is provided with a notch, and the first section of cable extends from the notch to connect with the electric control box; the reinforced wire pipe has two functions. One is to further wrap and protect the relatively fragile infusion pipe and cable, reduce the failure rate and extend the service life; the other is that during the maintenance process, the reinforced wire pipe also provides support and protection for the infusion pipe, and the screw connection method of the reinforced wire pipe and the adjacent measuring module is also firm and reliable, thus effectively resisting the tension on the infusion pipe and cable when lifting and pulling the measuring module, ensuring that the fragile pipeline will not be damaged, loose, broken or leaked during pulling.

[0018] As a further preference, an internal threaded sleeve is fixed on the upper part of each measuring module, and an external threaded section is provided at the lower end of the pull rod for screwing with the internal threaded sleeve; accordingly, the worker lowers the pull rod to the lower end of the maintenance pipe, and screws the external threaded section at the lower end of the pull rod with the internal threaded sleeve of the corresponding measuring module; in this way, the temporary fixation and disassembly process of the pull rod and the measuring module are convenient and quick, and once screwed and fixed, the pull rod is firmly connected to the measuring module, which is conducive to pulling and convenient for maintenance.

[0019] As a further preference, each internal threaded sleeve is provided with a tapered closing that is larger at the top and smaller at the bottom; the pull rod is provided with a plurality of radial grooves, and a guide ring is rotatably fitted in each radial groove, and each radial groove limits the corresponding guide ring along the height direction, and each guide ring is provided with a set of cross-shaped fins; in this way, since the foundation base plate is 3-6 meters thick and the pull rod is also 3-6 meters long, the worker holds the pull rod of such a length, and a centrally positioned fin is provided on the pull rod, and a tapered closing is provided on the top of the internal threaded sleeve, which is beneficial for the worker to accurately center the pull rod, making the process of the worker screwing the pull rod and the internal threaded sleeve easier, faster and more accurate.

[0020] The preferred docking structure of the infusion tube and each liquid pipe joint is that the liquid storage tank is provided with a discharge pipe joint and a return liquid pipe joint, and the measuring module is provided with a front liquid pipe joint and a rear liquid pipe joint; each liquid pipe joint includes a base nut welded to the measuring module housing or the bottom plate of the liquid storage tank, a core tube connected to the inner cavity of the measuring module or the inner cavity of the liquid storage tank is provided in the base nut, and an enlarged head is provided at the outer end of the core tube; the rubber tube at the end of the infusion tube is tightly fitted on the enlarged head of the corresponding liquid pipe joint; the end of the infusion tube is fitted with an expansion head, the outer end of the expansion head is a hexagonal screw portion and the inner end is an expansion tube, the expansion tube The external thread is screwed into the internal thread of the center hole of the base nut of the corresponding liquid pipe joint, and the expansion tube further squeezes the rubber tube and the expansion head that fit together. In this way, the infusion tube and the liquid pipe joint are firmly and tightly connected to avoid leakage, which can reduce the failure rate and extend the service life in daily use. More importantly, in the process of repairing and pulling the measuring module, the infusion tube will inevitably be pulled. Therefore, targeted reinforcement of the connection between the infusion tube and the liquid pipe joint can effectively withstand the pulling tension and ensure that the liquid pipe will not be damaged, loosened, damaged or leaked during the maintenance process.

[0021] The connection structure of the cable and the cable connector is preferably that cable connectors are provided at the front and rear ends of the measuring module and the lower end of the electrical control box, each cable connector is provided with two jacks, and the cable connector is provided with external threads; two pins are provided at the end of each cable, and a locking nut can be rotatably fitted at the end of each cable, and each cable is provided with two front and rear ribs, and an inwardly convex clamping ring is provided at the outer end of the locking nut, and the clamping ring of the locking nut is axially limited between the front and rear ribs of the cable; the cable pin is inserted into the corresponding cable connector jack and the inner thread of the locking nut is screwed into the outer thread of the corresponding cable connector; in this way, it ensures that the cable and the corresponding cable connector are firmly connected in normal times to reduce the failure rate, and the connection part can also be targetedly strengthened during maintenance, so that it can effectively resist the pulling tension when the measuring module is pulled, thereby avoiding the cable from loosening and being damaged.

[0022] As a further preference, the bayonet is located on the bottom plate of the protective box, and the bayonet also includes two left and right card plates, a reinforcing rib is provided between the outer side of each card plate and the bottom plate of the protective box, a card slot is provided on the inner side of each card plate, and two card strips are provided on the left and right sides of the measuring module; when the measuring module is inserted into the bayonet, the two card strips are inserted into the two card slots; in this way, it ensures that there is elasticity between the two card plates of the bayonet, which is conducive to pulling out the measuring module from the bayonet, and after the connection, the measuring module and the bayonet are firmly and tightly connected.

[0023] As a preferred maintenance method, the ear plate at one end of a new section of reinforced wire pipe is tied to the ear plate at one end of the removed old reinforced wire pipe using wire; in this way, the ear plate of the reinforced wire pipe can ensure that the reinforced wire pipe and the measuring module are firmly and reliably screwed together, resisting the tension of the measuring module pulling, and when the old wire pipe is replaced with a new wire pipe for threading, the old and new reinforced wire pipes can be quickly, conveniently and firmly fixed to ensure that the new reinforced wire pipe is pulled smoothly and stably, killing two birds with one stone. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a structural schematic diagram of a super-high-rise building ultra-thick concrete foundation slab settlement measuring device buried under the foundation slab.

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure after removing the foundation slab.

[0026] Figure 3 yes Figure 2 Schematic diagram of the structure after removing the foundation bottom plate steel mesh.

[0027] Figure 4 yes Figure 3 Schematic diagram of the structure after removing the protective box and protective tube.

[0028] Figure 5 It is a system principle diagram of the settlement measuring device of the ultra-thick concrete foundation slab of a super high-rise building according to the present invention.

[0029] Figure 6 yes Figure 4 A magnified structural diagram of part A.

[0030] Figure 7 The diagram is a half-section schematic diagram of a locking nut of a settlement measuring device for an ultra-thick concrete foundation slab of a super-high-rise building according to the present invention.

[0031] Figure 8 It is a semi-sectional schematic diagram of a base nut of a settlement measuring device for an ultra-thick concrete foundation slab of a super-high-rise building according to the present invention.

[0032] Figure 9 The diagram is a schematic structural diagram of the device for measuring the settlement of an ultra-thick concrete foundation slab of a super-high-rise building according to the present invention, with the measuring module and one side reinforcement wire pipe disassembled.

[0033] Figure 10 This is a schematic diagram of the structure after the infusion tube and cable are further disassembled.

[0034] Figure 11 It is a schematic diagram of the structure after further disassembling the locking nut and the expansion head.

[0035] Figure 12 This is a schematic diagram of the structure after the last measurement module and the rear reinforcement wire tube are disassembled.

[0036] Figure 13 It is a structural schematic diagram of the pull rod of the settlement measuring device of the ultra-thick concrete foundation slab of a super high-rise building according to the present invention.

[0037] Figure 14 The present invention is a schematic structural diagram of the bottom portion of an electric control box of a device for measuring the settlement of an ultra-thick concrete foundation slab of a super-high-rise building.

[0038] Figure 15 yes Figure 14 Schematic diagram of the structure after the electric control box and two reinforced wire pipes are disassembled.

[0039] Figure 16 yes Figure 15 Schematic diagram of the enlarged structure of part B.

[0040] Figure 17 yes Figure 11 Schematic diagram of the enlarged structure of part C.

[0041] Figure 18 The diagram is a semi-sectional schematic view of a protection box of a settlement measuring device for an ultra-thick concrete foundation slab of a super-high-rise building according to the present invention.

[0042] Figure 19 It is a structural schematic diagram of the settlement measuring device for ultra-thick concrete foundation slab of a super-high-rise building of the present invention after the measuring module is detached from the bayonet and the middle section of the protective box is cut open.

[0043] Figure 20 yes Figure 19 Schematic diagram of the structure after deflection at a certain angle.

[0044] As shown in the figure: 1. Liquid storage tank, 2. Measuring module, 3. Electric control box, 4. Infusion tube, 5. Base nut, 6. Cable, 7. Cable connector, 8. Base plate, 9. Pad, 10. Protection box, 11. Middle protection tube, 12. Front protection tube, 13. Rear protection tube, 14. Bayonet, 15. Card, 16. Reinforcement rib, 17. Card slot, 18. Card strip, 19. Maintenance tube, 20. Upper Cover, 21. Pull rod, 22. Internal threaded sleeve, 23. Tapered end, 24. Radial groove, 25. Guide ring, 26. Fin, 27. Reinforced wire tube, 28. Ear plate, 29. Screw, 30. Core tube, 31. Enlarged head, 32. Hexagonal screw part, 33. Extruded tube, 34. Lock nut, 34.1. Snap ring, 35. Contact, 36. Raised rib, 37. Reaction strain gauge, 38. Shrapnel. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] like Figures 1 to 20As shown, embodiment 1 of the present invention's device for measuring the settlement of an ultra-thick concrete foundation slab of a super-high-rise building comprises a liquid storage tank 1, n (e.g., 50) measurement modules 2, and an electrical control box 3, where n is a natural number greater than 3, and n represents a plurality. The electrical control box 3 is equipped with a data collector and a main controller. The liquid storage tank 1 and the electrical control box 3 are both installed in a permanent area away from the settlement area, such as on a stable, non-settling surface outside the building's foundation pit, at a certain distance from the building's foundation pit. Each measurement module 2 is connected in series with the liquid storage tank 1 via multiple sections of liquid infusion pipes 4 to form a circuit. Specifically, the front liquid pipe connector of the first measurement module 2 is connected to the discharge pipe connector of the liquid storage tank 1 via a section of liquid infusion pipe 4. The front liquid pipe connectors of the remaining measurement modules 2, excluding the first measurement module 2, are connected to the rear liquid pipe connector of the previous measurement module 2 via a section of liquid infusion pipe 4. The rear liquid pipe connector of the last measurement module 2 is connected to the return liquid pipe connector of the liquid storage tank 1 via a section of liquid infusion pipe 4. Each measurement module 2 is connected in series to the electrical control box 3 via multiple cable segments 6. Specifically, the electrical control box 3 connects to the cable connector 7 at the front of the first measurement module 2 via a cable segment 6. The cable connectors 7 at the front of each measurement module 2, excluding the first, connect to the cable connector 7 at the rear of the previous measurement module 2 via a cable segment 6. Each measurement module 2 has a sensing membrane, a full-bridge silicon chip, and a shutoff valve within its cavity. The high-rise building's underground structure includes a concrete foundation slab 8, which is cast on a cushioning layer 9.

[0047] The settlement measuring device also includes n protection boxes 10 and n-1 middle protection tubes 11 for resisting pouring pressure. Each middle protection tube 11 is fixed between two adjacent protection boxes 10. The protection boxes 10 are placed on the cushion layer 9 of the foundation slab 8. In order to resist pouring pressure, the protection boxes 10 can also be fixed to the cushion layer 9 via anchor bolts. The protection boxes 10 and the middle protection tubes 11 are both pre-buried in the concrete at the bottom of the foundation slab 8. The front end of the first protection box 10 is provided with a front protection tube 12 extending from the bottom of the foundation slab 8 to the permanent area, and the rear end of the last protection box 10 is provided with a rear protection tube 13 extending from the bottom of the foundation slab 8 to the permanent area.

[0048] Each section of the infusion tube 4 and the cable 6 of the same section are housed in a protective tube of the same section. Here we explain a concept, the same section. The first section of the infusion tube 4 is located between the first measuring module 2 and the liquid storage tank 1, and the first section of the cable 6 is located between the first measuring module 2 and the electric control box 3. The first section of the infusion tube 4, the first section of the cable 6 and the front section of the protective tube 12 belong to the same section; the second section of the infusion tube 4, the second section of the cable 6 and the second section of the protective tube, that is, the first section of the middle section of the protective tube 11 belong to the same section; the nth section of the infusion tube 4, the nth section of the cable 6 and the n-1th section of the middle section of the protective tube 11 belong to the same section; the last section of the infusion tube 4 and the rear section of the protective tube 13 belong to the same section, and there is no cable 6 in this section.

[0049] Each measuring module 2 is snapped into place with a bayonet 14 in the corresponding protective box 10. The bayonet 14 is located on the bottom plate of the protective box 10. The bayonet 14 also includes two left and right clamping plates 15. A reinforcing rib 16 is provided between the outer side of each clamping plate 15 and the bottom plate of the protective box 10. A clamping groove 17 is provided on the inner side of each clamping plate 15. Two clamping strips 18 are provided on the left and right sides of the measuring module 2. When the measuring module 2 is snapped into the bayonet 14, the two clamping strips 18 are snapped into the two clamping grooves 17.

[0050] Each protection box 10 is provided with a maintenance pipe 19 connected from the box body to the top surface of the foundation base plate 8; each protection box 10 top plate is provided with an upper opening, the lower end of the maintenance pipe 19 is connected to the upper opening of the protection box 10, and the upper end of the maintenance pipe 19 is provided with an upper cover 20 flush with the top surface of the foundation base plate 8.

[0051] The settlement measuring device also includes a pull rod 21 for temporarily connecting the measuring module 2 so as to pull the measuring module 2 out of the bayonet 14 and pull it out of the top surface of the foundation base plate 8 along the maintenance pipe 19. The temporary connection in this embodiment means that an internal threaded sleeve 22 is fixed on the upper part of each measuring module 2, and the lower end of the pull rod 21 is provided with an external threaded section for screwing with the internal threaded sleeve 22. Preferably, each internal threaded sleeve 22 is welded with a tapered end 23 that is larger at the top and smaller at the bottom; the pull rod 21 is provided with a plurality of radial grooves 24, and a guide ring 25 is rotatably fitted in each radial groove 24, and each radial groove 24 limits the corresponding guide ring 25 in height, and each guide ring 25 is provided with a set of cross-shaped fins 26, which clamp the four corners of the maintenance pipe 19 to ensure that the pull rod 21 is centered.

[0052] Each section of the infusion tube 4 and cable 6 has a sufficient length for the corresponding measurement module 2 to be pulled out of the base plate 8. For the first section of the infusion tube 4 and cable 6, only the first measurement module 2 needs to be pulled out during maintenance. Therefore, the remaining length of the first section of the infusion tube 4 and cable 6 is at least one base plate 8 thickness longer than the length of the front protective tube 12. Similarly, the length of the last section of the infusion tube 4 is at least one base plate 8 thickness longer than the length of the rear protective tube 13. And for the other normal sections of the infusion tube 4 and cable 6 in the middle, the length is at least two base plate 8 thicknesses longer than the length of the middle protective tube 11 in the same section. This ensures that two adjacent measurement modules 2 can be pulled out of the base plate 8 when the pipeline is repaired or replaced.

[0053] Each section of the infusion tube 4 is wrapped with a section of reinforcing conduit 27. The electrical cable 6 in the same section of the infusion tube 4 is also wrapped within the same section of reinforcing conduit 27. To increase strength, the reinforcing conduit 27 in this embodiment is constructed from PVC tubes embedded with high-strength galvanized wire. This galvanized wire is spirally distributed within the tube wall, maximizing the strength and tensile strength of the reinforcing conduit 27. Each reinforcing conduit 27 is equipped with perforated lugs 28 at both ends. Each measuring module 2 is equipped with screws 29 at both ends, and screws 29 are also located near the discharge and return pipe connections of the liquid storage tank 1. The front end lug 28 of the first section of reinforced conduit 27 is screwed to a screw 29 near the discharge pipe connection of the liquid storage tank 1, and the rear end lug 28 of the first section of reinforced conduit 27 is screwed to the front end screw 29 of the first measurement module 2. The lugs 28 at each end of each section of reinforced conduit 27, except for the first and last sections, are screwed to the rear end screws 29 of the front measurement module 2 and the front end screws 29 of the rear measurement module 2, respectively. The front end lug 28 of the last section of reinforced conduit 27 is screwed to the rear end screw 29 of the last measurement module 2, and the rear end lug 28 of the last section of reinforced conduit 27 is screwed to the screw 29 near the return pipe connection of the liquid storage tank 1. A notch is provided at the front end of the first section of reinforced conduit 27, through which the first section of cable 6 extends to connect to the electrical control box 3.

[0054] The first section of reinforced conduit 27 is the same length as the first section of fluid delivery tube 4. The first section of electrical cable 6 is longer than the first section of reinforced conduit 27, allowing the first section of electrical cable 6 to extend through the gap in the first section of reinforced conduit 27 and dock with the electrical control box 3. Except for the first section, the reinforced conduit 27, fluid delivery tube 4, and electrical cable 6 in the same section are all the same length. This leaves enough room in the reinforced conduit 27 for the corresponding measurement module 2 to be pulled out of the base plate 8 for maintenance.

[0055] The liquid storage tank 1 is provided with a liquid discharge pipe joint and a liquid return pipe joint, and the measuring module 2 is provided with a front liquid pipe joint and a rear liquid pipe joint. The above four joints are all liquid pipe joints of the same structure. Each liquid pipe joint includes a base nut 5 welded to the housing of the measuring module 2 or to the bottom plate of the liquid storage tank 1. A core tube 30 is provided in the center hole of the base nut 5, which is connected to the inner cavity of the measuring module 2 or the inner cavity of the liquid storage tank 1. An enlarged head 31 is provided at the outer end of the core tube 30. The rubber tube at the end of the infusion tube 4 is tightly fitted on the enlarged head 31 of the corresponding liquid pipe joint core tube 30. Two expansion heads are fitted on the two ends of the infusion tube 4. Each expansion head has a hexagonal screw portion 32 at the outer end and an expansion tube 33 at the inner end. The external thread of the expansion tube 33 is screwed with the internal thread of the center hole of the base nut 5 of the corresponding liquid pipe joint, and the expansion tube 33 further squeezes the rubber tube and the expansion head 31 that fit together.

[0056] The front and rear ends of the measurement module 2 and the lower end of the electrical control box 3 are each provided with a cable connector 7. Each cable connector 7 has several sockets and external threads. Each cable 6 has several pins at its end. A locking nut 34 is rotatably fitted around the end of each cable 6. Each cable 6 has two front and rear ribs 36. The outer end of the locking nut 34 is provided with an inwardly protruding snap ring 34.1. The snap ring 34.1 of the locking nut 34 is axially limited between the front and rear ribs 36 of the cable 6. The pins of the cable 6 are inserted into the corresponding sockets of the cable connector 7, and the internal threads of the locking nut 34 are screwed into the external threads of the corresponding cable connector 7. In this embodiment, each cable connector 7 has two sockets, each corresponding to the end of the cable 6 having two pins. One set of pin sockets is used to connect the submerged power line, and the other set of pin sockets is used to connect the submerged signal line. The above-mentioned submerged power line and submerged signal line are both located within the cable 6.

[0057] Embodiment 2 of the present invention's settlement measurement device for ultra-thick concrete foundation slabs of super-high-rise buildings differs from the previous embodiment in that each cable connector 7 has four jacks, corresponding to four pins at the end of the cable 6. A reaction strain gauge 37 is provided on the lower surface of the base plate of each protective box 10. Two spring clips 38 are provided on the upper surface of the base plate of each protective box 10, respectively connected to the lower reaction signal line and lower reaction power line of the reaction strain gauge 37. In addition to the settlement power line and settlement signal line, the cable 6 also contains an upper reaction signal line and an upper reaction power line. Two contacts 35 are provided on the lower surface of the measurement module 2, respectively connected to the upper reaction signal line and the upper reaction power line. When the measurement module 2 is pressed downward and snapped into the latch 14 of the protective box 10, the two spring clips 38 and the two contacts 35 close, connecting the reaction strain gauge 37 and the electrical control box 3. This enables the collection of soil reaction values ​​on the foundation base plate 8. Correspondingly, the four sets of pins and sockets correspond to the settlement power line, settlement signal line, reaction force signal line, and reaction force power line, respectively. This not only enriches the data collection types of the settlement measurement device of this application, but also integrates the reaction force measurement system into the settlement measurement device's own cable system, eliminating the need for separate wiring and routing. This optimizes the wiring.

[0058] It is known from common sense that the main controller is connected to each measurement module 2, the reaction force strain gauge 37, the full-bridge silicon chip, and the stop valve signal.

[0059] By using this settlement measuring device, the various measuring modules 2 can be laid out after the cushion layer 9 is constructed and before the foundation slab 8 is poured. The various measuring modules 2 and the corresponding infusion pipes 4 and cables 6 are placed on the cushion layer 9 along with the protective box 10 and the protective pipe. Then the concrete of the foundation slab 8 is poured, so that the various measuring modules 2 and related pipelines are buried at the bottom of the foundation slab 8, and the settlement of the foundation slab 8 can be completely and comprehensively detected.

[0060] The present invention provides a method for inspecting and repairing a settlement measuring device of an ultra-thick concrete foundation bottom plate of a super-high-rise building, which comprises the following steps.

[0061] The settlement measurement device of the present application may fail due to disrepair during service. When the pressure of a measurement module 2 drops suddenly, the main controller will disconnect the corresponding shut-off valve upon receiving an abnormal signal. The measurement module with the sudden pressure drop is the suspected faulty measurement module.

[0062] If the fault occurs in the central measurement module 2, a worker stands on the top surface of the foundation slab 8, holds a pull rod 21, lowers it along the corresponding maintenance pipe 19, and temporarily connects the pull rod 21 to the suspected faulty measurement module 2. That is, the pull rod 21 is lowered to the lower end of the maintenance pipe 19, and the externally threaded section at the lower end of the pull rod 21 is screwed into the internally threaded sleeve 22 of the corresponding measurement module 2. The measurement module 2 is then pulled upward and out of the upper end of the maintenance pipe 19, allowing the suspected faulty measurement module to reach the top surface of the foundation slab 8 for easy access. The worker disconnects the old measurement module 2 from the corresponding cable 6, infusion tube 4, and reinforcement pipe 27, and replaces and connects the new measurement module 2. If the fault disappears, the repair is complete.

[0063] If there is still a fault, it means that the fault occurs in a section of the pipeline on the rear side of the measuring module 2, so use the pull rod 21 to pull the next measuring module 2 from the next maintenance pipe 19 out of the basic base plate 8, and remove the reinforcement wire pipe 27 between the two pulled-out measuring modules 2 and the infusion pipe 4 and cable 6 wrapped in the reinforcement wire pipe 27; then tie one end of the new section of reinforcement wire pipe 27 containing the infusion pipe 4 and cable 6 to one end of the removed old reinforcement wire pipe 27, and preferably use iron wire to tie the ear plate 28 at one end of the new section of reinforcement wire pipe 27 to the ear plate 28 at one end of the old reinforcement wire pipe 27. Then, pull the old reinforcement wire pipe 27 from the other end, pull the old reinforcement wire pipe 27 out from the bottom of the basement, and at the same time complete the threading of the new reinforcement wire pipe 27 and the infusion pipe 4 and cable 6 wrapped inside along the path of the next maintenance pipe 19, the next protection box 10, the central protection pipe, the previous protection box 10, and the previous maintenance pipe 19; then dock the two ends of the new reinforcement wire pipe 27, infusion pipe 4 and cable 6 after threading with the two pulled out measuring modules 2; finally, use the pull rod 21 to screw and fix the two measuring modules 2 in succession and lower the two measuring modules 2 along their respective maintenance pipes 19 in succession, so that the two measuring modules 2 are re-stuck in the bayonet 14 of their respective protection boxes 10, and finally cover the upper cover 20 of each maintenance pipe 19.

[0064] If the fault occurs in the last measuring module 2, and after the fault of the measuring module 2 itself is eliminated by replacing the last measuring module 2, it is only necessary to directly remove the last section of the reinforcement wire pipe 27 and the infusion tube 4, and tie one end of the new reinforcement wire pipe 27 to one end of the old reinforcement wire pipe 27, then pull the old reinforcement wire pipe 27 from the other end and simultaneously thread the new reinforcement wire pipe 27, and finally connect the two ends of the new reinforcement wire pipe 27 and the new infusion tube 4 to the last measuring module 2 and the liquid storage tank 1 respectively.

[0065] If the fault occurs in the first measuring module 2, replace the measuring module 2 first, then replace the latter section of the reinforced wire pipe 27, the infusion tube 4, and the cable 6. If the fault is still not eliminated, remove and replace the previous section of the reinforced wire pipe 27, the infusion tube 4, and the cable 6. Use the same method to thread the new reinforced wire pipe 27, the infusion tube 4, and the cable 6, and then connect the new reinforced wire pipe 27 and the infusion tube 4 to the first measuring module 2 and the liquid storage tank 1 respectively, and connect the two ends of the new cable 6 to the first measuring module 2 and the electrical control box 3.

Claims

1. A device for measuring the settlement of ultra-thick concrete foundation slabs of super-high-rise buildings, comprising a liquid storage tank, n measuring modules, and an electrical control box equipped with a data collector and a main controller; the liquid storage tank and the electrical control box are both installed in a permanent area; each measuring module is connected in series with the liquid storage tank via multiple sections of liquid delivery pipes to form a loop; each measuring module is connected in series with the electrical control box via multiple sections of electrical cables; each measuring module is equipped with a sensing membrane, a full-bridge silicon chip, and a shut-off valve; and the device is characterized by: The settlement measurement device also includes n protection boxes and n-1 middle protection tubes for resisting pouring pressure. Each middle protection tube is fixed between two adjacent protection boxes. The protection boxes and middle protection tubes are pre-buried in the bottom of the foundation slab. The front end of the first protection box is provided with a front protection tube extending to the permanent area, and the rear end of the last protection box is provided with a rear protection tube extending to the permanent area. Each section of the infusion tube and the cable at the same section are accommodated in the protection tube at the same section. Each measuring module is snap-fitted into the bayonet inside the corresponding protective box, and each protective box is provided with a maintenance pipe connected from the box body to the top surface of the foundation slab; the settlement measuring device also includes a pull rod for temporarily connecting the measuring module so as to pull the measuring module out of the bayonet and pull it out of the foundation slab along the maintenance pipe; the infusion tube and cable of each section are left with a length margin for the corresponding measuring module to be pulled out of the foundation slab.

2. The device for measuring the settlement of ultra-thick concrete foundation slabs of super-high-rise buildings according to claim 1 is characterized in that: Each section of the infusion pipe is wrapped with a section of reinforced wire pipe, and the cable in the same section is also wrapped in the reinforced wire pipe; each reinforced wire pipe is provided with ear plates at both ends, each measuring module is provided with screws at the front and rear ends, and screws are provided near the discharge pipe joint and the return pipe joint of the liquid storage tank; the front end ear plate of the first section of reinforced wire pipe is screwed to the screw near the discharge pipe joint of the liquid storage tank, and the rear end ear plate of the first section of reinforced wire pipe is screwed to the front end screw of the first measuring module, and the ear plates at both ends of each middle section of reinforced wire pipe are respectively screwed to the rear end screw of the front measuring module and the front end screw of the rear measuring module, and the front end ear plate of the last section of reinforced wire pipe is screwed to the rear end screw of the last measuring module, and the rear end ear plate of the last section of reinforced wire pipe is screwed to the screw near the return pipe joint of the liquid storage tank; a notch is provided at the front end of the first section of reinforced wire pipe, and the first section of cable extends from the notch to be connected to the electrical control box.

3. The device for measuring the settlement of ultra-thick concrete foundation slabs of super-high-rise buildings according to claim 1 is characterized in that: An internal threaded sleeve is fixed on the upper part of each measuring module, and an external threaded section for screwing with the internal threaded sleeve is provided at the lower end of the pull rod.

4. The device for measuring the settlement of ultra-thick concrete foundation slabs of super-high-rise buildings according to claim 3 is characterized by: Each internal threaded sleeve is provided with a tapered closing that is larger at the top and smaller at the bottom; the pull rod is provided with multiple radial grooves, and a guide ring is rotatably fitted in each radial groove. Each radial groove limits the height of the corresponding guide ring, and each guide ring is provided with a set of cross-shaped fins.

5. The device for measuring the settlement of ultra-thick concrete foundation slabs of super-high-rise buildings according to claim 1 is characterized in that: The liquid storage tank is provided with a discharge pipe joint and a return liquid pipe joint, and the measuring module is provided with a front liquid pipe joint and a rear liquid pipe joint; each liquid pipe joint includes a base nut welded to the measuring module housing or the bottom plate of the liquid storage tank, and a core tube connected to the inner cavity of the measuring module or the inner cavity of the liquid storage tank is provided in the base nut, and an enlarged head is provided at the outer end of the core tube; the rubber tube at the end of the infusion tube is tightly fitted on the enlarged head of the corresponding liquid pipe joint; the end of the infusion tube is fitted with an expansion head, the outer end of the expansion head is a hexagonal screwing part and the inner end is an expansion tube, the external thread of the expansion tube is screwed with the internal thread of the center hole of the base nut of the corresponding liquid pipe joint, and the expansion tube further squeezes the rubber tube and the enlarged head that are fitted together.

6. The device for measuring the settlement of ultra-thick concrete foundation slabs of super-high-rise buildings according to claim 1 is characterized in that: Cable connectors are provided at the front and rear ends of the measuring module and the lower end of the electrical control box. Each cable connector is provided with two jacks and an external thread. Two pins are provided at the end of each cable. A locking nut can be rotatably fitted at the end of each cable. Each cable is provided with two front and rear ribs. An inwardly convex snap ring is provided at the outer end of the locking nut. The snap ring of the locking nut is axially limited between the two front and rear ribs of the cable. The cable pins are inserted into the corresponding cable connector jacks and the inner thread of the locking nut is screwed into the outer thread of the corresponding cable connector.

7. The device for measuring the settlement of ultra-thick concrete foundation slabs of super-high-rise buildings according to claim 1 is characterized in that: The bayonet is located on the bottom plate of the protective box. The bayonet also includes two left and right card plates. A reinforcing rib is provided between the outer side of each card plate and the bottom plate of the protective box. A card slot is provided on the inner side of each card plate. Two card strips are provided on the left and right sides of the measuring module. When the measuring module is inserted into the bayonet, the two card strips are inserted into the two card slots.

8. A method for inspecting and repairing a settlement measuring device for an ultra-thick concrete foundation slab of a super-high-rise building, characterized by: It includes the following steps: When the pressure drop shut-off valve of a measurement module is disconnected, a worker standing on the foundation floor holds a pull rod and lowers it along the corresponding maintenance pipe to temporarily connect it to the measurement module. The worker then pulls the measurement module upward and out of the top of the maintenance pipe. The worker replaces the measurement module. If the fault disappears, the maintenance is complete. If there is still a fault, it means that the fault occurs in a section of pipeline on the rear side of the measuring module, so use the pull rod to pull the next measuring module from the next maintenance pipe out of the foundation base plate, and remove the reinforcement wire pipe between the two pulled-out measuring modules and the infusion pipe and cable wrapped inside it; then tie one end of a new section of reinforcement wire pipe containing infusion pipe and cable line to one end of the removed old reinforcement wire pipe; then pull the old reinforcement wire pipe from the other end, pull the old reinforcement wire pipe out from the bottom of the basement and complete the threading of the new reinforcement wire pipe at the same time; then connect the two ends of the new reinforcement wire pipe, infusion pipe and cable line to the two pulled-out measuring modules; finally, use the pull rod to lower the two measuring modules along their respective maintenance pipes one after another, so that the two measuring modules are re-stuck in the bayonet of their respective protection boxes.

9. The method for inspecting and repairing the settlement measuring device for ultra-thick concrete foundation slab of a super-high-rise building according to claim 8, characterized in that: Use wire to tie the ear plate at one end of the new reinforced wire pipe to the ear plate at one end of the removed old reinforced wire pipe.

10. The method for inspecting and repairing the settlement measuring device for ultra-thick concrete foundation slab of a super-high-rise building according to claim 8, characterized in that: The worker lowers the pull rod to the lower end of the maintenance pipe and screws the external threaded section at the lower end of the pull rod into the internal threaded sleeve of the corresponding measuring module.

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