Foundation pit settlement on-line monitoring equipment

Abstract

The invention relates to the technical field of foundation pit monitoring, and discloses foundation pit settlement online monitoring equipment, which comprises a cylindrical monitoring main body, the bottom end of the monitoring main body is open, the inner top wall of the monitoring main body is fixedly connected with a laser range finder, a wireless network transmitter is in communication connection with a monitoring base station, and the monitoring base station is in communication connection with the wireless network transmitter. The driving end of the driver is fixedly connected with the top end of the lead screw, a supporting assembly is installed on the outer wall of the monitoring rod, the supporting assembly is used for reducing the pressure borne by unit area of soil applied to a foundation pit monitoring point by the monitoring rod, and fixing assemblies are installed on the outer side of the monitoring body and the upper surface of the connecting plate. And the fixing assembly is used for fixing the monitoring main body above the foundation pit. The contact area with the pit bottom is increased through the supporting air bag, so that the pressure applied to the ground by the monitoring rod is dispersed, and the situation that the monitoring rod slowly sinks into the soil layer under the influence of the gravity of the monitoring rod when making contact with the bottom soil layer of the foundation pit for a long time, and consequently the detection structure is not accurate enough is avoided.

Description

Technical Field

[0001] This invention relates to the field of foundation pit monitoring technology, specifically to an online monitoring device for foundation pit settlement. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the base elevation and foundation plan dimensions. Before excavation, the excavation plan must be determined based on geological and hydrological data and the actual conditions of nearby buildings. Proper waterproofing and drainage must also be implemented. For shallower excavations, slope protection can be used to ensure slope stability; the slope angle must be determined according to relevant construction regulations. When conducting settlement testing on the excavation pit, testing equipment is indispensable.

[0003] Commonly used foundation pit settlement detection devices typically consist of a set of support rods and a set of monitoring rods. In operation, the support rods are placed on the ground at the edge of the foundation pit to provide support for the monitoring rods. The monitoring rods are then inserted into the pit until their bottom contact the bottom soil layer. If settlement occurs, the monitoring rods will adaptively move downwards relative to the support rods. Workers determine settlement based on this downward movement of the monitoring rods. However, this method of settlement detection using monitoring rods in contact with the bottom soil layer has drawbacks: when the bottom of the monitoring rod is in contact with the bottom soil layer for an extended period, its own weight will cause it to gradually and slowly penetrate the soil. In this case, the downward movement of the monitoring rod relative to the support rods cannot definitively indicate that settlement has occurred. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an online monitoring device for foundation pit settlement, which solves the problem that the downward movement of the monitoring rod relative to the support rod due to its own weight does not accurately indicate that foundation pit settlement has occurred.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an online monitoring device for foundation pit settlement, comprising a cylindrical monitoring body with an opening at the bottom; a laser rangefinder fixedly connected to the inner top wall of the monitoring body; the laser rangefinder electrically connected to a wireless network transmitter; the wireless network transmitter communicatively connected to a monitoring base station; an annular connecting plate disposed inside the monitoring body; a monitoring rod fixedly connected to the center of the lower surface of the connecting plate; a guide rod penetrating the surface of the connecting plate; and both ends of the guide rod fixedly connected to the inner top wall and inner bottom wall of the monitoring body, respectively. A lead screw is threaded through the surface of the plate, and an adjusting seat is threaded to the outer wall of the lead screw. The outer wall of the adjusting seat is slidably connected to the inner wall of the monitoring body. The bottom end of the lead screw is rotatably connected to the inner bottom wall of the monitoring body. An actuator is fixedly connected to the upper surface of the monitoring body, and the driving end of the actuator is fixedly connected to the top end of the lead screw. A support assembly is installed on the outer wall of the monitoring rod. The support assembly is used to reduce the pressure exerted by the monitoring rod on the soil per unit area at the monitoring point of the foundation pit. A fixing assembly is installed on the outer side of the monitoring body and the upper surface of the connecting plate. The fixing assembly is used to fix the monitoring body above the foundation pit.

[0006] Preferably, the support assembly includes a support airbag and a plurality of ring-shaped blocking rods. The support airbag is ring-shaped, and the inner wall of the support airbag is fixedly disposed on the lower outer wall of the monitoring rod. One end of each blocking rod is fixedly installed on the lower inner wall of the monitoring body.

[0007] Preferably, the support assembly further includes an annular upper plate, the inner wall of which is fixedly connected to the outer wall of the monitoring rod, an annular adjusting airbag fixedly connected to the lower surface of the upper plate, an annular lower plate fixedly connected to the lower surface of the adjusting airbag, the monitoring rod passing through the lower plate, and several tension springs fixedly connected to opposite sides of the upper and lower plates, and the support airbag and the adjusting airbag are connected by a flexible hose.

[0008] Preferably, the fixing component includes two support frames, and two sets of support rails are fixedly arranged on opposite sides of the two support frames. The support rails are formed by combining several sub-rails in a threaded connection manner. The support rails include a support body, the upper surface of the support body has a groove, and an L-shaped baffle is fixedly connected to the outer side wall of the support body. The length of the baffle is less than the length of the support body, and several fixing holes are opened on the side wall of the support body.

[0009] Preferably, the fixing assembly further includes a sliding platform, two L-shaped adjusting plates, and two sets of equidistantly distributed slots. The outer wall of the monitoring body penetrates the sliding platform. Moving wheels are fixedly installed at the four corners of the sliding platform. The outer walls on both sides of the monitoring body protrude outward to form raised layers. The lower side wall of the adjusting plate is slidably connected to the outer wall of the raised layer. The slots are opened from top to bottom on the surface of the raised layer. A counterweight rod is fixedly connected to the lower surface of the adjusting plate at the upper end of the monitoring body. The outer wall of the counterweight rod penetrates the monitoring body.

[0010] Preferably, an upper limit plate is fixedly connected to the upper side wall of the counterweight rod, a lower limit plate is fixedly connected to the lower side wall of the counterweight rod, and a plurality of connection ports are provided on the surface of the adjusting plate.

[0011] Preferably, the inner wall of the sliding table has two mounting grooves, and the inside of the mounting groove is slidably connected to a limit pin. The limit pin is T-shaped, and the outer wall of the limit pin is fixedly connected to a limit spring. The end of the limit spring away from the limit pin is fixedly connected to the inner wall of the mounting groove.

[0012] Preferably, an electric hoist is symmetrically fixedly connected to the lower surface of the sliding table, and an annular lifting platform is fixedly connected to the bottom end of the connecting rope of the electric hoist. A limit groove is opened on the inner side wall of the lifting platform, and two limiting columns are fixedly connected to the upper surface of the lifting platform. An electric push rod is embedded in the lower side wall of the monitoring body.

[0013] Preferably, the sliding table has a U-shaped mounting cavity inside, a fixing head is slidably connected inside the mounting cavity, a fixing spring is sleeved on the outside of the fixing head, a limiting opening is opened on both sides of the surface of the sliding table, and a spring telescopic rod is fixedly connected to the outer wall of the fixing head.

[0014] Preferably, fixing ears are fixedly connected to both sides of the upper surface of the sliding platform, a pull rope is fixedly connected to the outer wall of the fixing ears, and a lifting ear is fixedly connected to the upper surface of the monitoring body.

[0015] Working principle: During monitoring, the support frame is fixed on the flat ground around the foundation pit. The sliding platform is placed on the support frame above the ground to facilitate docking and installation by ground personnel. After the monitoring body is docked and inserted into the inner wall of the sliding platform, the electric push rod is activated to extend. As the monitoring body descends, the drive end of the electric push rod abuts against the lifting platform to provide suspension support for the monitoring body, facilitating subsequent movement of the monitoring body. Pulling the rope causes the sliding platform to slide on the support frame until it moves to the predetermined monitoring point in the foundation pit. Then, the electric hoist is activated to lower the line, allowing the monitoring body to descend to a suitable height according to the depth of the foundation pit, leaving sufficient monitoring distance for the monitoring rod. This method is suitable for monitoring settlement in foundation pits of various depths.

[0016] Before installing the monitoring unit, it needs to be adjusted. Starting the driver rotates the lead screw, which in turn causes the adjusting seat to slide upwards. The adjusting seat pushes the connecting plate upwards, causing the monitoring rod to move upwards and be stored inside the monitoring unit. This reduces the overall length of the monitoring unit and monitoring rod, facilitating transportation and installation. The rising connecting plate pushes the counterweight rod upwards until the lower limit plate abuts against the inner top wall of the monitoring unit, stopping the driver operation. The counterweight rod then pushes the adjusting plate upwards, causing the connecting port on its surface to misalign with the slot. This prevents the limit pin from being mistakenly inserted into the slot when the monitoring unit is inserted into the sliding table, thus avoiding mis-fixation and damage to the monitoring unit. The height of the monitoring body cannot be adjusted by lowering it. After the height of the monitoring body is adjusted, the drive is activated to move in the reverse direction, causing the connecting plate to descend and no longer press against the counterweight rod. The counterweight rod pulls the adjusting plate down by its own weight, so that the connecting port aligns with the slot. At this time, the electric hoist drives the lifting platform and the monitoring body to descend slowly again for a distance, so that the limit pin is inserted into the nearest slot above under the elastic force of the limit spring. This achieves automatic locking of the monitoring body above the foundation pit without manual operation, avoiding the high construction safety problems caused by suspended operation when the foundation pit is deep, and improving the convenience of construction.

[0017] After the monitoring body and sliding platform are fixed, the electric push rod is retracted, and then the electric hoist retracts the cord to drive the lifting platform to rise. Through the insertion and guidance of the limiting groove and the raised layer, the limiting column rises vertically when the lifting platform rises, avoiding rotation and accurately inserting into the limiting port. Therefore, the lifting platform will not rotate when used again in a subsequent period, facilitating the insertion and cooperation of the limiting groove and the raised layer. At the same time, when the limiting column is inserted into the limiting port, it pushes the fixing head to slide outward, causing the spring telescopic rod to retract and abut against the side wall of the supporting body. At this time, pulling the rope again will cause the spring telescopic rod to automatically extend and insert into the nearest fixing hole along the direction of movement, thereby fixing the position of the sliding platform. This allows the monitoring rod to stably monitor the predetermined foundation pit area, avoiding deviation and reducing the danger of installation in long and deep foundation pits. The monitoring area of ​​the monitoring rod can be flexibly adjusted, improving the convenience of installation.

[0018] During monitoring, the monitoring rod is lowered to the bottom of the pit. The support airbags increase the contact area with the ground, which increases the monitoring range to a certain extent. At the same time, the weight of the monitoring rod can be distributed to prevent it from slowly sinking into the soil layer due to its own weight when in contact with the bottom of the pit for a long time, which would lead to inaccurate detection. The distance to the connecting plate can be measured by the laser rangefinder. When the pit settles, the monitoring rod and the connecting plate descend synchronously, and the measurement distance also increases synchronously, thereby monitoring the settlement distance of the pit.

[0019] When the monitoring rod is raised after use, the stop rod presses down on the lower plate, thereby pulling the adjusting airbag to extend. This draws gas from inside the supporting airbag into the adjusting airbag, causing it to contract. This facilitates the airbag's entry into the monitoring body for safekeeping and reduces friction with the inner wall of the monitoring body. When the rod is lowered during monitoring, the tension spring pulls up the lower plate, causing the upper and lower plates to press against the adjusting airbag. This allows gas to flow back into the supporting airbag, causing it to expand and support the monitoring rod. This allows the supporting airbag to self-adaptively contract or expand and retract, extending its service life.

[0020] This invention provides an online monitoring device for foundation pit settlement. It has the following beneficial effects:

[0021] 1. This invention increases the contact area with the bottom of the pit by supporting the airbag, thereby dispersing the pressure applied to the ground by the monitoring rod. This prevents the monitoring rod from slowly sinking into the soil layer due to its own weight when in contact with the bottom soil layer of the pit for a long time, which would result in inaccurate detection structure.

[0022] 2. After the invention is used, the monitoring rod is stored inside the monitoring body, thereby reducing the length for easy transportation. At the same time, the support airbag will also contract to facilitate its entry into the monitoring body for storage and protection, and reduce friction with the inner wall of the monitoring body, thus extending the service life of the support airbag.

[0023] 3. The present invention can flexibly adjust the length of the support track according to the length of the foundation pit to meet the multi-point monitoring needs of large-span foundation pits. Pulling the sliding table can adjust the position of the monitoring body along the support track and realize automatic locking and unlocking, thereby facilitating the installation of monitoring equipment.

[0024] 4. This invention, through the cooperation of an electric hoist and a lifting platform, allows for remote adjustment of the height of the monitoring body relative to the foundation pit above the predetermined monitoring point, providing sufficient monitoring distance for the monitoring rod, and is suitable for monitoring settlement of foundation pits at various depths. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of the monitoring body of the present invention;

[0027] Figure 3 This is a schematic diagram of the support component structure of the present invention;

[0028] Figure 4 This is a partial structural diagram of the fixing component of the present invention;

[0029] Figure 5 For the present invention Figure 4 Enlarged view of point A;

[0030] Figure 6 This is a schematic diagram of the sliding table structure of the present invention;

[0031] Figure 7 For the present invention Figure 6 Enlarged view of point B;

[0032] Figure 8 This is a partial structural diagram of the adjustment plate of the present invention;

[0033] Figure 9 This is a schematic diagram of the limiting pin structure of the present invention;

[0034] Figure 10 This is a schematic diagram of the internal structure of the mounting cavity of the present invention.

[0035] The components include: 1. Monitoring body; 2. Connecting plate; 3. Monitoring rod; 4. Laser rangefinder; 5. Guide rod; 6. Lead screw; 7. Adjusting seat; 8. Support assembly; 81. Support airbag; 82. Stop rod; 83. Upper plate; 84. Adjusting airbag; 85. Lower plate; 86. Tension spring; 9. Fixing assembly; 901. Support frame; 902. Support rail; 903. Sliding table; 904. Adjusting plate; 905. Slot; 907. Counterweight rod; 908. Upper limit plate; 909. Lower limit plate; 910. Connection port; 911. Extrusion protrusion; 912. Installation... 913. Groove; 914. Limiting pin; 915. Sliding protrusion; 916. Limiting spring; 917. Limiting post; 918. Fixed spring; 919. Spring telescopic rod; 921. Moving wheel; 923. Electric hoist; 924. Lifting platform; 925. Limiting groove; 926. Electric push rod; 927. Mounting cavity; 928. Fixing head; 929. Limiting port; 930. Pull rope; 9021. Support body; 9022. Slide groove; 9023. Baffle; 9024. Fixing hole; 10. Driver; 11. Protruding layer; 12. Lifting lug; 13. Cover. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Please see the appendix Figure 1 - Appendix Figure 2This invention provides an online monitoring device for foundation pit settlement, comprising a cylindrical monitoring body 1 with an opening at the bottom. A laser rangefinder 4 is fixedly connected to the inner top wall of the monitoring body 1. The laser rangefinder 4 is electrically connected to a wireless network transmitter, which is communicatively connected to a monitoring base station. An annular connecting plate 2 is provided inside the monitoring body 1. A monitoring rod 3 is fixedly connected to the center of the lower surface of the connecting plate 2. A guide rod 5 is provided through the surface of the connecting plate 2, with its two ends fixedly connected to the inner top wall and inner bottom wall of the monitoring body 1, respectively. A lead screw 6 is provided through the surface of the connecting plate 2, and an adjusting seat 7 is threadedly connected to the outer wall of the lead screw 6. The outer wall of the adjusting seat 7... The monitoring rod 3 is slidably connected to the inner wall of the monitoring body 1. The bottom end of the lead screw 6 is rotatably connected to the inner bottom wall of the monitoring body 1. The driver 10 is fixedly connected to the upper surface of the monitoring body 1. The driving end of the driver 10 is fixedly connected to the top end of the lead screw 6. The outer wall of the monitoring rod 3 is equipped with a support component 8. The support component 8 is used to reduce the pressure exerted by the monitoring rod 3 on the soil per unit area at the monitoring point of the foundation pit. The outer side of the monitoring body 1 and the upper surface of the connecting plate 2 are equipped with a fixing component 9. The fixing component 9 is used to fix the monitoring body 1 above the foundation pit. The inner top wall of the monitoring body 1 is fixedly equipped with a controller. The controller is electrically connected to the laser rangefinder 4, the wireless network transmitter and the driver 10 for control.

[0038] Specifically, the number of monitoring entities 1 can be flexibly increased or decreased according to the number of monitoring points. Monitoring entities 1 are used to connect and fix components 9 and to store and protect the monitoring equipment. Laser rangefinder 4 is used to monitor the settlement distance of the foundation pit and transmit the monitoring data to the monitoring base station through a wireless network transmitter, so that the personnel at the monitoring base station can know the settlement of the foundation pit based on the data changes. Connecting plate 2 is used to connect monitoring rod 3. Monitoring rod 3 is made of lightweight materials such as carbon fiber to reduce weight and pressure on the bottom of the pit and the supporting airbag 81. Monitoring rod 3 is used to descend according to the settlement of the foundation pit and drive connecting plate 2 to descend, so that the laser rangefinder 4 can measure the distance between itself and connecting plate 2 to obtain the settlement length of the foundation pit. Guide rod 5 is used to limit the movement direction of connecting plate 2 to achieve vertical lifting and lowering. Driver 10 is used to drive lead screw 6 to rotate. The rotation of lead screw 6 is used to adjust the height of adjusting seat 7. When in use, adjusting seat 7 is lowered to the lowest end to avoid affecting the sliding of monitoring rod 3. After use, the upper end of adjusting seat 7 drives connecting plate 2 to rise, and connecting plate 2 drives monitoring rod 3 to rise and be stored in monitoring entity 1, thereby reducing the length and facilitating transportation and installation.

[0039] Please see the appendix Figure 3The support assembly 8 includes a support airbag 81 and several annularly distributed stop rods 82. The support airbag 81 is annular, and its inner wall is fixedly installed on the lower outer wall of the monitoring rod 3. One end of each stop rod 82 is fixedly installed on the lower inner wall of the monitoring body 1. Two semi-circular shields 13 are provided on the outer side of the support airbag 81. The shields 13 are detachably connected to the lower end of the monitoring rod 3 by bolts. Two sets of threaded holes are provided on both sides of the lower end of the monitoring rod 3. The upper side wall of the shields 13 has two connecting holes corresponding to the threaded holes. The connecting hole allows the bolt to pass through and threaded into the threaded hole, enabling a detachable connection between the shield 13 and the monitoring rod 3. This allows the shield 13 to be removed from the pit before storing the monitoring rod 3. The shield 13 is used to protect the support airbag 81 and to shield it from falling objects, thus preventing impact and deformation that could affect the accuracy of the detection. It is also suitable for use in windy and rainy weather, shielding it from the effects of rain and wind. The bottom of the shield 13 is kept at the same level as the lowest surface of the inflated support airbag 81.

[0040] Specifically, during monitoring, the monitoring rod 3 increases the contact area with the bottom of the pit by supporting the airbag 81, thereby dispersing the pressure exerted on the ground by the monitoring rod 3. This prevents the monitoring rod 3 from slowly sinking into the soil layer due to its own weight when in contact with the bottom soil layer of the foundation pit for a long time, which would lead to inaccurate detection. When the monitoring equipment is installed near the side wall of the foundation pit, a shield 13 is installed at the bottom of the monitoring rod 3 to prevent soil from falling from the side wall of the foundation pit and squeezing the supporting airbag 81, thus affecting the accuracy of the detection. In addition, the shield 13 is made of opaque material, which can reduce the aging rate of the supporting airbag 81 under ultraviolet radiation.

[0041] Please see the appendix Figure 3 The support assembly 8 also includes an annular upper plate 83, the inner wall of which is fixedly connected to the outer wall of the monitoring rod 3. An annular adjusting airbag 84 is fixedly connected to the lower surface of the upper plate 83, and an annular lower plate 85 is fixedly connected to the lower surface of the adjusting airbag 84. The monitoring rod 3 passes through the lower plate 85. Several tension springs 86 are fixedly connected to the opposite side of the upper plate 83 and the lower plate 85. The tension of the tension springs 86 is greater than the pressure exerted on the support airbag 81 by the weight of the monitoring rod 3, so that during monitoring, the tension springs 86 can pull the lower plate 85 close to the upper plate 83, thereby squeezing the adjusting airbag 84. The support airbag 81 and the adjusting airbag 84 are connected by a hose.

[0042] Specifically, the hose is used to transport airflow between the support airbag 81 and the regulating airbag 84. The diameter of the upper plate 83 is smaller than that of the lower plate 85, so that when the upper plate 83 rises, it contacts the stop rod 82, and the lower plate 85 contacts the stop rod 82. When the monitoring rod 3 rises after use, the stop rod 82 presses down on the lower plate 85, thereby pulling the regulating airbag 84 to extend, drawing the gas inside the support airbag 81 into the regulating airbag 84, causing the support airbag 81 to contract, making it easier to enter the interior of the monitoring body 1 for storage and protection, and reducing friction with the inner wall of the monitoring body 1. When the monitoring rod 3 descends, the tension spring 86 pulls the lower plate 85 up, causing the upper plate 83 and the lower plate 85 to squeeze the regulating airbag 84, causing the gas to flow back into the support airbag 81 and drive it to expand to support the monitoring rod 3.

[0043] Please see the appendix Figure 4 - Appendix Figure 8 The fixing component 9 includes two support frames 901. Two sets of support rails 902 are fixedly installed on opposite sides of the two support frames 901. The support rails 902 are formed by combining several sub-rails in a threaded connection manner. The support rails 902 include a support body 9021. The upper surface of the support body 9021 has a sliding groove 9022. An L-shaped baffle 9023 is fixedly connected to the outer wall of the support body 9021. The length of the baffle 9023 is less than the length of the support body 9021. Several fixing holes 9024 are opened on the side wall of the support body 9021. The fixing component 9 also includes a sliding table 903, two L-shaped adjusting plates 904, and two sets of equidistantly distributed slots 905. The outer wall of the monitoring body 1 penetrates the sliding table 903. The four corners of the sliding table 903 are divided into... The monitoring body 1 is equipped with a fixed movable wheel 921. The outer walls on both sides of the monitoring body 1 protrude outward to form a raised layer 11. The lower side wall of the adjustment plate 904 is slidably connected to the outer wall of the raised layer 11. The slot 905 is opened from top to bottom on the surface of the raised layer 11. A counterweight rod 907 is fixedly connected to the lower surface of the adjustment plate 904 at the upper end of the monitoring body 1. The outer wall of the counterweight rod 907 penetrates the monitoring body 1. A spring can be sleeved on the surface of the counterweight rod 907. The two ends of the spring are fixedly connected to the bottom protrusion of the counterweight rod 907 and the inner top wall of the monitoring body 1, respectively, to further increase the stability of the sliding table 903 and cooperate with the gravity of the counterweight rod 907 to prevent the limiting pin 913 from pushing the adjustment plate 904 to slide and expose the slot 905 when it moves along the adjustment plate 904.

[0044] Specifically, the support frame 901 is used to fix the equipment on the flat ground around the pit to provide support for the entire device. The slide groove 9022 of the support rail 902 is used for the sliding of the moving wheel 921. The support rail 902 is formed by assembling sub-rails. The length of the support rail 902 can be flexibly adjusted according to the length of the pit to meet the multi-point monitoring needs of large-span pits. The sliding platform 903 can be placed in the two ends of the support body 9021. When the sliding platform 903 moves onto the pit, the baffle 9023 longitudinally limits the sliding platform 903 to prevent the sliding platform 903 and the monitoring body 1 from falling. The counterweight rod 907 is used to apply a downward pulling force to the adjusting plate 904 so that when the adjusting plate 904 slides to the bottom, the connecting port 910 is aligned with the slot 905. The adjusting plate 904 is used to block the slot 905 when the monitoring body 1 adjusts its height inside the sliding platform 903. The protruding layer 11 is used to dock with the insertion mounting slot 912 to prevent the monitoring body 1 from rotating when it descends.

[0045] Please see the appendix Figure 6 - Appendix Figure 9 An upper limit plate 908 is fixedly connected to the upper side wall of the counterweight rod 907, and a lower limit plate 909 is fixedly connected to the lower side wall of the counterweight rod 907. Several connection ports 910 are provided on the surface of the adjusting plate 904. Triangular extrusion protrusions 911 are provided on both sides of each connection port 910. The outer walls of the extrusion protrusions 911 are fixedly connected to the outer wall of the adjusting plate 904. The connection ports 910 are rectangular, and oblique cuts are provided at the upper and lower ends of each connection port 910. Two... A mounting slot 912 has a sliding connection of a limiting pin 913 inside the mounting slot 912. The limiting pin 913 is T-shaped and includes a rectangular connector. A cylindrical insert is fixedly provided on the side wall of the connector. A limiting spring 915 is fixedly connected to the outer wall of the limiting pin 913. The end of the limiting spring 915 away from the limiting pin 913 is fixedly connected to the inner wall of the mounting slot 912. A right-angled triangular sliding protrusion 914 is fixedly connected to the lower side wall of the limiting pin 913.

[0046] Specifically, the upper limit plate 908 and the lower limit plate 909 are used to limit the lifting range of the adjusting plate 904. When the monitoring rod 3 is retracted into the inner wall of the monitoring body 1 and drives the adjusting seat 7 to rise to the top, it sequentially pushes the connecting plate 2 and the counterweight plate, causing the lower limit plate 909 to abut against the inner top wall of the monitoring body 1, thus misaligning the connecting port 910 with the slot 905. After the adjusting seat 7 descends, the upper limit plate 908 abuts against the top wall of the monitoring body 1, aligning the connecting port 910 with the slot 905. When the monitoring body 1 rises and falls along the sliding table 903, the insertion of the limiting pin 913 is achieved through the oblique cut. The connector can be moved in or out of the connector 910 along the bevel to prevent the connector 910 from jamming the limiting pin 913 and causing motion interference. The connector is used to slide with the mounting groove 912, while the insert is used to insert into the inner wall of the slot 905. The diameter of the insert is the same as the diameter of the slot 905 to improve the stability during insertion. The limiting spring 915 is used to apply elastic force to the limiting pin 913, so that the limiting pin 913 abuts against the adjusting plate 904 and tightly abuts against the slot 905 when inserted into it, thereby enhancing the stability of insertion. The pressing protrusion 911 is used to push the sliding protrusion 914.

[0047] Please see the appendix Figure 6 - Appendix Figure 7 An electric hoist 923 is symmetrically fixedly connected to the lower surface of the sliding table 903. An annular lifting platform 924 is fixedly connected to the bottom end of the connecting rope of the electric hoist 923. A limit groove 925 is opened on the inner side wall of the lifting platform 924. Two limit posts 916 are fixedly connected to the upper surface of the lifting platform 924. An electric push rod 926 is embedded in the lower side wall of the monitoring body 1.

[0048] Specifically, the limiting groove 925 is used for the insertion of the protruding layer 11 to prevent the lifting platform 924 from rotating when the monitoring body 1 is inserted. During installation, the ground will limit the descent height of the monitoring body 1. After the monitoring body 1 is inserted into the sliding platform 903, the electric push rod 926 is extended. When the monitoring body 1 descends, the drive end of the electric push rod 926 abuts against the lifting platform 924, thereby supporting the monitoring body 1. This allows the monitoring body 1 to move above the predetermined monitoring point of the foundation pit along with the sliding platform 903. The height of the monitoring body 1 is adjusted, and the electric hoist 923 releases the wire, causing the lifting platform 924 to descend synchronously with the monitoring body 1. When the body reaches the predetermined height, the electric hoist 923 is shut off. At this point, the drive driver 10 rotates the lead screw 6, causing the connecting plate 2 to descend, thus removing the limit on the adjusting plate 904. This allows the adjusting plate 904 to descend to its lowest point, aligning the connecting port 910 with the slot 905. Then, the electric hoist 923 is controlled again to release the wire, causing the monitoring body 1 to descend again, while the limit pin 913 will... When the monitoring body 1 descends, it is inserted into the upper slot 905, thereby locking the monitoring body 1 and achieving remote automatic fixation. This eliminates the need for manual installation when the installation point of the monitoring body 1 is far from the ground, improving ease of use. After monitoring is completed, when the equipment needs to be disassembled, the electric hoist 923 releases the cable, causing the lifting platform 924 to descend below the monitoring body 1. Then, the electric push rod 926 extends and retracts, while the driver 10 drives the adjusting seat 7 to rise to the top, moving the monitoring rod 3 upward and storing it inside the monitoring body 1. At the same time, the adjusting plate 904 is pushed upward and slides. The squeezing protrusion 911 squeezes the sliding protrusion 914, causing the limit pin 913 to slide outward and exit the slot 905, disconnecting the sliding platform 903 from the monitoring body 1. Then, the electric hoist 923 is controlled to retract the cable, causing the monitoring body 1 to rise above the ground, allowing it to be removed from the pit. Finally, the sliding platform 903 is pulled to the ground for disassembly of the monitoring body 1. This facilitates the disassembly and use of the monitoring equipment, reducing manual operation and danger.

[0049] Please see the appendix Figure 10 The sliding table 903 has a U-shaped mounting cavity 927 inside. A fixing head 928 is slidably connected inside the mounting cavity 927. A fixing spring 917 is sleeved on the outside of the fixing head 928. Restriction openings 929 are respectively opened on both sides of the surface of the sliding table 903. A spring telescopic rod 918 is fixedly connected to the outer wall of the fixing head 928.

[0050] Specifically, the mounting cavity 927 is connected to the limiting port 929. The fixing head 928 is located at one end of the limiting port and has an inclined surface. The fixing spring 917 is used to limit the sliding table 903, so that the spring telescopic rod 918 is stored in the mounting cavity 927 to prevent it from extending. When the lifting platform 924 rises to the top, the limiting post 916 is inserted into the limiting port 929 and contacts the inclined surface of the fixing head 928, thereby pushing the fixing head 928 out of the mounting cavity 927. The fixing head 928 then drives the spring telescopic rod 918 to move outward until it retracts and abuts against the side wall of the supporting body 9021. At this time, by pulling the sliding table 903, the spring telescopic rod 918 can be aligned with the adjacent fixing hole 9024, extend and insert into the fixing hole 9024, realize the remote fixing of the sliding table 903, prevent the monitoring body 1 from shifting during monitoring, and improve the accuracy of monitoring.

[0051] Please see the appendix Figure 1 and attached Figure 5 The upper surface of the sliding table 903 is fixedly connected to both sides of the fixed ears, and the outer wall of the fixed ears is fixedly connected to the pull rope 930. The upper surface of the monitoring body 1 is fixedly connected to the lifting lug 12.

[0052] Specifically, the fixing lug is used to connect the pull rope 930. The pull rope 930 is used to facilitate the installation personnel to pull the sliding table 903 on the ground. It is simple, convenient, low-cost, and easy to install. The lifting lug 12 is used to connect with the crane when the size of the monitoring body 1 is large, so as to facilitate the insertion and cooperation of the monitoring body 1 with the sliding table 903, or to remove the monitoring body 1 from the sliding table 903.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online monitoring device for foundation pit settlement, comprising a cylindrical monitoring body (1), characterized in that: The bottom end of the monitoring body (1) is open, and a laser rangefinder (4) is fixedly connected to the inner top wall of the monitoring body (1), and the laser rangefinder (4) is electrically connected to a wireless network transmitter, and the wireless network transmitter is communicatively connected to a monitoring base station. An annular connecting plate (2) is arranged inside the monitoring body (1), and a monitoring rod (3) is fixedly connected to the center of the lower surface of the connecting plate (2). A guide rod (5) is arranged through the surface of the connecting plate (2), and the two ends of the guide rod (5) are respectively fixedly connected to the inner top wall and the inner bottom wall of the monitoring body (1). A lead screw (6) is arranged through the surface of the connecting plate (2), and the outer wall of the lead screw (6) is threadedly connected to an adjustment seat (7 ), the outer wall of the adjustment seat (7) is slidably connected to the inner wall of the monitoring body (1), the bottom end of the lead screw (6) is rotatably connected to the inner bottom wall of the monitoring body (1), the upper surface of the monitoring body (1) is fixedly connected to a driver (10), the driving end of the driver (10) is fixedly connected to the top of the lead screw (6), the outer wall of the monitoring rod (3) is installed with a support assembly (8), the support assembly (8) is used to reduce the pressure per unit area of ​​soil applied by the monitoring rod (3) to the foundation pit monitoring point, and the outer side of the monitoring body (1) and the upper surface of the connecting plate (2) are installed with a fixing assembly (9), the fixing assembly (9) is used to fix the monitoring body (1) above the foundation pit.

2. The on-line monitoring device for foundation pit settlement according to claim 1 is characterized in that: The support assembly (8) comprises a support airbag (81) and a plurality of blocking rods (82) distributed in a ring shape. The support airbag (81) is arranged in a ring shape. The inner wall of the support airbag (81) is fixedly arranged on the lower outer wall of the monitoring rod (3). One end of the blocking rod (82) is fixedly installed on the lower inner wall of the monitoring body (1). Two semicircular shielding covers (13) are arranged on the outer side of the support airbag (81). The shielding covers (13) are detachably connected to the lower end of the monitoring rod (3) by bolts.

3. The on-line monitoring device for foundation pit settlement according to claim 2 is characterized in that: The support assembly (8) also includes an annular upper plate body (83), the inner wall of the upper plate body (83) is fixedly connected to the outer wall of the monitoring rod (3), the lower surface of the upper plate body (83) is fixedly connected to an annular regulating airbag (84), the lower surface of the regulating airbag (84) is fixedly connected to an annular lower plate body (85), the monitoring rod (3) passes through the lower plate body (85), the upper plate body (83) and the lower plate body (85) are fixedly connected on opposite sides thereof with a plurality of tension springs (86), and the support airbag (81) and the regulating airbag (84) are connected via a hose.

4. The on-line monitoring device for foundation pit settlement according to claim 1 is characterized in that: The fixing assembly (9) comprises two support frames (901), two groups of support rails (902) are fixedly arranged on opposite sides of the two support frames (901), the support rails (902) are formed by combining a plurality of sub-rails in a threaded connection manner, the support rails (902) comprise a support body (9021), a slide groove (9022) is provided on the upper surface of the support body (9021), an L-shaped baffle (9023) is fixedly connected to the outer side wall of the support body (9021), the length of the baffle (9023) is less than the length of the support body (9021), and a plurality of fixing holes (9024) are provided on the side wall of the support body (9021).

5. The on-line monitoring device for foundation pit settlement according to claim 1 is characterized in that: The fixing assembly (9) further comprises a sliding platform (903), two L-shaped adjustment plates (904), and two groups of equally spaced card slots (905); the outer wall of the monitoring body (1) passes through the sliding platform (903); moving wheels (921) are fixedly arranged at the four corners of the sliding platform (903); the outer walls on both sides of the monitoring body (1) protrude outward to form a protruding layer (11); the lower side wall of the adjustment plate (904) is slidably connected to the outer wall of the protruding layer (11); the card slot (905) is provided on the surface of the protruding layer (11) from top to bottom; the lower surface of the adjustment plate (904) at one end above the monitoring body (1) is fixedly connected to a counterweight rod (907); and the outer wall of the counterweight rod (907) passes through the monitoring body (1).

6. The on-line monitoring device for foundation pit settlement according to claim 5 is characterized in that: The upper side wall of the counterweight rod (907) is fixedly connected to an upper limit plate (908), and the lower side wall of the counterweight rod (907) is fixedly connected to a lower limit plate (909). The surface of the adjustment plate (904) is provided with a plurality of connection ports (910), and triangular extrusion protrusions (911) are respectively provided on both sides of the connection ports (910), and the outer wall of the extrusion protrusion (911) is fixedly connected to the outer wall of the adjustment plate (904).

7. The on-line monitoring device for foundation pit settlement according to claim 5 is characterized in that: The inner wall of the sliding platform (903) is provided with two mounting grooves (912), the inner part of the mounting groove (912) is slidably connected to a limit pin (913), the limit pin (913) is set to be T-shaped, the outer wall of the limit pin (913) is fixedly connected to a limit spring (915), one end of the limit spring (915) away from the limit pin (913) is fixedly connected to the inner wall of the mounting groove (912), and the lower side wall of the limit pin (913) is fixedly connected to a right-angled triangle-shaped sliding protrusion (914).

8. The on-line monitoring device for foundation pit settlement according to claim 5 is characterized by: The lower surface of the sliding platform (903) is symmetrically fixedly connected to an electric hoist (923), the bottom end of the connecting rope of the electric hoist (923) is fixedly connected to an annular lifting platform (924), the inner wall of the lifting platform (924) is provided with a limiting groove (925), the upper surface of the lifting platform (924) is fixedly connected to two limiting columns (916), and the lower side wall of the monitoring body (1) is embedded with an electric push rod (926).

9. The on-line monitoring device for foundation pit settlement according to claim 5 is characterized by: The interior of the sliding table (903) is provided with a middle-shaped installation cavity (927). A fixed head (928) is slidably connected inside the installation cavity (927). A fixed spring (917) is sleeved outside the fixed head (928). Restriction ports (929) are respectively opened on both sides of the surface of the sliding table (903). A spring telescopic rod (918) is fixedly connected to the outer side wall of the fixed head (928).

10. The on-line monitoring device for foundation pit settlement according to claim 5, characterized in that: Fixed ears are respectively fixedly connected to both sides of the upper surface of the sliding table (903). A pull rope (930) is fixedly connected to the outer wall of the fixed ear. A lifting ear (12) is fixedly connected to the upper surface of the monitoring body (1).

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