Deep foundation pit gushing water blocking device with early warning function and construction method thereof

Abstract

The application discloses a deep foundation pit gushing water blocking device with a prewarning function and a construction method thereof. The deep foundation pit gushing water blocking device comprises a multifunctional drainage mechanism, which comprises a drainage ditch and a water collecting well. A box body is arranged on the upper side of the water collecting well. A water filtering cylinder extending to the lower side of the water collecting well is arranged at the bottom of the box body. A water pumping pump and a standby water pumping pump are arranged in the box body. A separation cylinder with a float body fixedly connected to the top is movably arranged on the water filtering cylinder. A pressure sensor is arranged on the fixed convex edge bottom of the water filtering cylinder. A connecting spring abutting against the pressure sensor is arranged on the float body. The gushing water blocking mechanism comprises a moving vehicle body. A limiting guide rod is arranged on the moving vehicle body. The limiting guide rod is hollowly arranged and movably connected with a jacking rod. A corresponding blocking assembly is detachably arranged on the bottom of the jacking rod. The application can effectively and quickly and accurately prewarn the occurrence of gushing water and effectively and reliably block the gushing water.

Description

Technical Field

[0001] This invention relates to a device for sealing sudden water inrush in deep foundation pits with early warning function and its construction method. It can effectively provide early warning of sudden water inrush during the drainage process of foundation pits and can seal the sudden water inrush according to the early warning signal. Background Technology

[0002] Sudden water inrushes in deep foundation pits have become one of the most frequent and significant safety hazards in the field of underground engineering. If these inrushes are not detected in time, they can easily lead to damage to construction equipment, delays in the construction period, and in severe cases, even pit wall collapse, threatening the safety of nearby buildings. Currently, the assessment of sudden water inrushes in foundation pits mainly relies on manual monitoring. This monitoring process is greatly affected by human factors, and abnormal signals are often only detected after the danger has become obvious, resulting in delayed early warning and perception.

[0003] Existing methods for sealing water inrushes generally employ two approaches. One involves hydraulically pressing and installing the sealing component directly into place. However, due to the relatively loose soil in the area of ​​the water inrush, directly using the sealing component to seal the inrush has a high failure rate, meaning the component is prone to detaching from its sealing position, leading to a re-emergence of the water inrush. The other method involves grouting, injecting cement grout mixed with a quick-drying agent into the location of the water inrush. The rapidly solidifying cement grout effectively seals the inrush. While this method can improve the success rate to some extent, the high water pressure and flow velocity of water inrushes make directly injecting the cement grout mixed with a quick-drying agent into the location extremely difficult. If not handled carefully, the cement grout mixed with the quick-drying agent can easily be washed away from the sealing area, causing significant problems.

[0004] Therefore, the research objective of this invention is to design a deep foundation pit inrush water sealing device with early warning function and its construction method that can effectively, quickly and accurately provide early warning of the occurrence of inrush water and effectively and reliably seal inrush water. Summary of the Invention

[0005] To address the technical problems existing in the prior art, the present invention provides a deep foundation pit sudden water inrush sealing device with early warning function and its construction method, which can effectively solve the technical problems existing in the prior art.

[0006] The technical solution of this invention is: A deep foundation pit sudden water inrush sealing device with early warning function includes: A multi-functional drainage mechanism includes a drainage ditch installed on the ground of the foundation pit and a collection well for collecting the drainage from the drainage ditch. A box is placed on the upper side of the collection well, and a filter cylinder extending to the lower side of the collection well is installed at the bottom of the box. Multiple corresponding filter holes are evenly distributed on the bottom and side walls of the filter cylinder. A pump for pumping out water entering the filter cylinder and a standby pump are installed inside the box. A corresponding isolation cylinder is movably sleeved on the side wall of the filter cylinder. A float is fixed to the top of the isolation cylinder. A fixed flange is provided on the top of the filter cylinder. Several pressure sensors are installed at intervals on the bottom of the fixed flange. Several connecting springs that abut against the pressure sensors are installed at intervals on the upper part of the float. A sudden water inrush sealing mechanism includes a mobile vehicle housed within a housing. The mobile vehicle is equipped with a limiting guide rod driven by a first hydraulic cylinder. The limiting guide rod is hollow and movably connected to a corresponding push rod, which is driven by a second hydraulic cylinder. The bottom of the push rod extends to the bottom side of the limiting guide rod and is detachably fitted with a corresponding sealing assembly. The sealing assembly consists of a set of sealing plates spaced at varying heights. The diameter of each sealing plate is larger than the diameter of the limiting guide rod, and several corresponding insertion rods are oscillatingly mounted on the upper sealing plate. The first hydraulic cylinder drives the limiting guide rod and the push rod downwards to press the sealing assembly down to the location of the sudden water inrush. Then, the second hydraulic cylinder drives the push rod upwards, causing the insertion rods to tilt outwards and insert into the soil layer at the location of the sudden water inrush, guided by the limiting guide rod.

[0007] A set of guide shafts for guiding the float is fixedly connected to the fixed protrusion facing downward. As the water level in the collection well rises, the float moves upward and drives the connecting spring to abut against the corresponding pressure sensor. When the pressure sensed by the pressure sensor reaches the set value F1, the water pump starts to drain water.

[0008] When the pressure sensed by the pressure sensor reaches the set value F2, the standby water pump starts to drain water and sends an early warning signal to the outside through the corresponding electrical controller control signal transmission module, where F2 > F1.

[0009] The cylinder body of the first hydraulic cylinder is fixedly installed on the mobile vehicle body. The piston rod end of the first hydraulic cylinder is set upward and fixedly connected to a corresponding moving plate. The top of the limiting guide rod is fixedly connected to the moving plate. The second hydraulic cylinder is fixedly installed on the upper side of the moving plate by a corresponding bracket. The push rod is fixedly connected to the piston rod end of the second hydraulic cylinder.

[0010] The bottom side of the limiting guide rod is arc-shaped, the bottom end of the sealing plate at the bottom is pointed, and the middle of the sealing plate at the top is provided with a corresponding mounting hole. The bottom of the push rod is inserted into the mounting hole, and a fixing plate located above the mounting hole and an elastic rubber plate located below the mounting hole are fixed to the push rod.

[0011] The inner ends of the cutting rods can be swung and installed onto the upper sealing plate, and corresponding support elastic members are fixedly installed between the cutting rods and the upper sealing plate, and the outer ends of the cutting rods are pointed.

[0012] The piston rod of the first hydraulic cylinder retracts to drive the moving plate downward, and the limiting guide rod, the push rod, and the sealing assembly are pressed down below the ground to seal the sudden surge of water; then, the second hydraulic cylinder drives the push rod upward to insert the cutting rods into the corresponding soil layers under the guidance of the limiting guide rod, and the supporting elastic element is compressed; after the sealing plate located at the top abuts against the limiting guide rod, the elastic rubber plate is squeezed into the hollow part of the limiting guide rod and leaves the hollow part of the limiting guide rod as the push rod continues to move upward.

[0013] The mobile vehicle is equipped with corresponding grouting pipes. The feed end of the grouting pipes is connected in parallel to the corresponding quick-drying agent source and cement slurry source. After the push rod leaves the hollow part of the limiting guide rod, the discharge end of the grouting pipe is extended through the upper sealing plate by manual operation. The quick-drying agent and cement slurry are mixed and transported into the spaced sealing plates by pumping.

[0014] Several evenly distributed arc-shaped hanging rods are fixed to the upper end face of the sealing plate located at the bottom.

[0015] A construction method for a deep foundation pit water inrush sealing device with early warning function, based on the deep foundation pit water inrush sealing device with early warning function described in Embodiment 1 above, includes the following specific steps: The housing is hoisted into place, allowing its filter cylinder to extend into the lower side of the water collection well; The sudden water inrush sealing mechanism is transported and fixed into the box for later use; When the pressure sensed by the pressure sensor reaches the set value F1, the water pump starts to drain water; When the pressure sensed by the pressure sensor reaches the set value F2, the standby water pump starts to drain water and sends an early warning signal to the outside through the corresponding electrical controller control signal transmission module. After the early warning signal is obtained at the signal receiving end, the mobile vehicle of the sudden water inrush sealing mechanism is manually driven to the location of the sudden water inrush to carry out the water inrush sealing operation.

[0016] Advantages of this invention: 1) The multifunctional drainage mechanism of the present invention includes a drainage ditch installed on the ground of the foundation pit and a collection well for collecting the drainage from the drainage ditch. A box is placed on the upper side of the collection well. A filter cylinder extending to the lower side of the collection well is installed at the bottom of the box, and a pump and a standby pump are installed for pumping out the water entering the filter cylinder. By intervening with an isolation cylinder movably fitted on the filter cylinder, it is possible to pump out conventional groundwater and provide early warning of sudden water inrush.

[0017] During normal construction, groundwater is collected in the sump through the drainage ditch. As the water level in the sump rises, the float on the isolation cylinder moves upward and drives the connecting spring to abut against the corresponding pressure sensor. When the pressure sensed by the pressure sensor reaches the set value F1, that is, when the water level reaches the initial set value, the pump starts to drain the water to continuously pump the groundwater outward.

[0018] When the pressure sensor detects a pressure of F2, meaning that even with the pumps running to drain water, the water level in the sump still rises to a higher set value, it can be determined that a significant water inrush may occur in the foundation pit. At this point, the standby pumps activate to prevent the water level from rising further rapidly, and a warning signal is sent out via the corresponding electrical controller's signal transmission module. Upon receiving the warning signal, construction personnel can quickly initiate an investigation. Because both the pumps and the standby pumps are running separately, there is a high probability that there will be no significant water accumulation on the foundation pit surface, facilitating rapid location of the water inrush. This achieves rapid and accurate early warning of water inrushes and facilitates quick location investigation.

[0019] 2) The bottom and side walls of the filter cylinder of the present invention are evenly provided with a plurality of corresponding filter holes, and the isolation cylinder is movably sleeved on the side wall of the filter cylinder to seal the filter holes on the upper part of the side wall of the filter cylinder, so that the water does not pass through the filter holes sealed by the isolation cylinder during normal pumping, thereby preventing the filter holes in this part from being blocked; when the float rises further until the pressure sensed by the pressure sensor reaches the set value F2, the standby water pump is started to perform drainage operation. At this time, the filter holes sealed by the isolation cylinder are also opened to significantly increase the rate at which the water enters the filter cylinder, thereby effectively assisting in improving the drainage rate of the water.

[0020] 3) The sudden water inrush sealing mechanism of the present invention includes a mobile vehicle housed within a box. The mobile vehicle is equipped with a limiting guide rod driven by a first hydraulic cylinder. The limiting guide rod is hollow and movably connected to a push rod, which is driven by a second hydraulic cylinder. The bottom of the push rod extends to the bottom side of the limiting guide rod and is detachably fitted with a sealing assembly. This sealing assembly consists of a set of sealing plates spaced at varying heights, with several corresponding insertion rods oscillatingly mounted on the upper sealing plate. During the sealing process, the first hydraulic cylinder drives the limiting guide rod and the push rod downwards to press the sealing assembly down to the location of the sudden water inrush. Then, the second hydraulic cylinder drives the push rod upwards, causing the insertion rods to be tilted outwards and inserted into the soil layer at the location of the sudden water inrush, guided by the limiting guide rod. This effectively pressurizes and seals the sealing component into place. Under the relative movement of the sealing component and the limiting guide rod, the insertion rod is driven outward to tilt and insert into the soil layer at the location of the sudden water inrush, thereby improving the support effect of the sealing component and effectively and reliably sealing the sudden water inrush.

[0021] 4) The diameter of the sealing plate of the present invention is larger than the diameter of the limiting guide rod, so as to ensure that the limiting guide rod does not form frictional contact with the soil layer during the pressurization and descent of the sealing assembly, thereby reducing the resistance of the sealing assembly during pressurization and descent, and improving the practical effect of the present invention.

[0022] 5) The cylinder body of the first hydraulic cylinder of the present invention is fixedly mounted on the mobile vehicle body. The piston rod end of the first hydraulic cylinder is arranged facing upward and fixedly connected to a moving plate. The top of the limiting guide rod is fixedly connected to the moving plate. The second hydraulic cylinder is fixedly mounted on the upper side of the moving plate by a corresponding bracket, and the push rod is fixedly connected to the piston rod end of the second hydraulic cylinder. In this way, the limiting guide rod and the push rod can be driven synchronously by the extension and retraction of the first hydraulic cylinder, and then the push rod can be driven separately by the second hydraulic cylinder, so as to further ensure the effectiveness of the present invention.

[0023] 6) The bottom side of the limiting guide rod of the present invention is arc-shaped to ensure that it can smoothly guide the insertion rod to swing outward; the bottom end of the sealing plate located at the lower part is pointed to help improve the downward smoothness of the sealing assembly. The middle part of the sealing plate located at the upper part is provided with a corresponding mounting hole, the bottom of the push rod is inserted into the mounting hole, and a fixing plate located above the mounting hole and an elastic rubber plate located below the mounting hole are fixed to the push rod. Under the action of the fixing plate, it is ensured that the push rod can effectively form a sufficient downward driving effect on the sealing plate located at the upper part, that is, on the sealing assembly. Under the action of the elastic rubber plate, the sealing plate located at the upper part can be effectively driven smoothly to abut against the limiting guide rod to ensure the smooth driving of the insertion rod. As the push rod continues to move upward, the elastic rubber plate is squeezed into the hollow part of the limiting guide rod and leaves the hollow part of the limiting guide rod as the push rod continues to move upward, so as to further ensure the practical effect of the present invention.

[0024] 7) After the elastic rubber plate leaves the hollow part of the limiting guide rod along with the push rod, the discharge end of the grouting pipe is extended through and into the upper sealing plate by manual operation. The quick-drying agent and cement slurry are mixed and transported into the spaced sealing plates by pumping to form a second sealing reinforcement between the spaced sealing plates and further increase the sealing firmness of the sealing component.

[0025] 8) The present invention has several evenly distributed arc-shaped hanging rods fixed to the upper end surface of the sealing plate located at the bottom. The intervention of the arc-shaped hanging rods improves the integrity between the solidified cement slurry block and the sealing component, thereby helping to improve the sealing firmness of the two against the sudden water inrush. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the deep foundation pit sudden water inrush sealing device with early warning function according to the present invention.

[0027] Figure 2 This is an assembly diagram of a filter cylinder of the present invention with an isolation cylinder movably sleeved on it.

[0028] Figure 3 This is a schematic diagram of the structure of the water inrush sealing mechanism of the present invention.

[0029] Figure 4 for Figure 3 A magnified view of part A in the image.

[0030] Figure 5 This is a flowchart of the construction process of the present invention.

[0031] In the attached diagram: 1. Drainage ditch; 2. Collection well; 3. Box body; 301. Filter cylinder; 301. Fixed flange; 4. Filter hole; 5. Water pump; 6. Backup water pump; 7. Isolation cylinder; 701. Float; 8. Pressure sensor; 9. Connecting spring; 10. Moving vehicle body; 11. First hydraulic cylinder; 12. Limiting guide rod; 13. Push rod; 14. Second hydraulic cylinder; 15. Sealing assembly; 16. Insertion rod; 17. Guide shaft; 18. Electric controller; 19. Moving plate; 20. Bracket; 21. Fixed plate; 22. Elastic rubber plate; 23. Supporting elastic element; 24. Grouting pipe; 25. Quick-drying agent source; 26. Cement slurry source; 27. Arc-shaped hanging rod. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings: Example 1 refer to Figure 1-4 A deep foundation pit sudden water inrush sealing device with early warning function, comprising: A multi-functional drainage mechanism includes a drainage ditch 1 installed on the ground of the foundation pit and a collection well 2 for collecting the drainage from the drainage ditch 1. A box 3 is placed on the upper side of the collection well 2. A filter cylinder 301 extending to the lower side of the collection well 2 is provided at the bottom of the box 3. Multiple corresponding filter holes 4 are evenly distributed on the bottom and side wall of the filter cylinder 301. A pump 5 and a standby pump 6 are installed inside the box 3 for pumping out the water entering the filter cylinder 301. A corresponding isolation cylinder 7 is movably sleeved on the side wall of the filter cylinder 301. A float 701 is fixedly connected to the top of the isolation cylinder 7. A fixed flange 3011 is provided on the top of the filter cylinder 301. Several pressure sensors 8 are installed at intervals on the bottom of the fixed flange 3011. Several connecting springs 9 that abut against the pressure sensors 8 are installed at intervals on the upper part of the float 701. The sudden water inrush sealing mechanism includes a mobile vehicle 10 housed within the housing 3. The mobile vehicle 10 is equipped with a limiting guide rod 12 driven by a first hydraulic cylinder 11. The limiting guide rod 12 is hollow and movably connected to a corresponding push rod 13, which is driven by a second hydraulic cylinder 14. The bottom of the push rod 13 extends to the bottom side of the limiting guide rod 12 and is detachably fitted with a corresponding sealing assembly 15, which consists of a set of components spaced at varying heights. The sealing plate is composed of a diameter larger than that of the limiting guide rod 12, and several corresponding insertion rods 16 are oscillatingly mounted on the upper sealing plate. The first hydraulic cylinder 11 drives the limiting guide rod 12 and the push rod 13 downward to press the sealing assembly 15 down to the location of the sudden water inrush. Then, the second hydraulic cylinder 14 drives the push rod 13 upward to cause the insertion rods 16 to tilt outward and insert into the soil layer at the location of the sudden water inrush under the guidance of the limiting guide rod 12.

[0033] The fixed convex edge 3011 is fixedly connected to a set of guide shafts 17 for guiding the float 701. As the water level in the collection well 2 rises, the float 701 moves upward and drives the connecting spring 9 to abut against the corresponding pressure sensor 8. When the pressure sensed by the pressure sensor 8 reaches the set value F1, the water pump 5 starts to drain water.

[0034] When the pressure sensed by the pressure sensor 8 reaches the set value F2, the standby water pump 6 starts to drain water and controls the signal transmission module to send a warning signal through the corresponding electrical controller 18, where F2 > F1. In this embodiment, the signal transmission module uses a Bluetooth module or a Wi-Fi module, and the signal receiving end is a mobile phone.

[0035] The multifunctional drainage mechanism of the present invention includes a drainage ditch 1 installed on the ground of the foundation pit, and a collection well 2 for collecting the drainage from the drainage ditch 1. A box 3 is placed on the upper side of the collection well 2. A filter cylinder 301 extending to the lower side of the collection well 2 is provided at the bottom of the box 3, and a pump 5 for pumping out the water entering the filter cylinder 301 and a standby pump 6 are installed. By intervening with an isolation cylinder 7 movably sleeved on the filter cylinder 301, it is possible to pump out conventional groundwater and provide early warning of sudden water inrush.

[0036] During normal construction, groundwater is collected in the collection well 2 through the drainage ditch 1. As the water level in the collection well 2 rises, the float 701 set on the isolation cylinder 7 moves upward and drives the connecting spring 9 to abut against the corresponding pressure sensor 8. When the pressure sensed by the pressure sensor 8 reaches the set value F1, that is, when the water level reaches the initial set value, the water pump 5 starts to drain water to continuously pump the conventional groundwater outward.

[0037] When the pressure sensed by pressure sensor 8 reaches the set value F2, that is, if the water level in the sump 2 rises to a higher set value even with pump 5 activated for drainage, it can be determined that there may be significant water inrush in the foundation pit. At this time, the standby pump 6 is activated to drain water to prevent the water level from rising further rapidly, and a warning signal is sent out through the control signal transmission module of the corresponding electrical controller 18. After receiving the warning signal, the construction personnel can quickly initiate the investigation procedure. Since pump 5 and the standby pump 6 are activated for drainage operations, there is a high probability that there will be no significant water accumulation on the foundation pit ground, which facilitates the construction personnel's rapid investigation of the location of the water inrush. This achieves rapid and accurate early warning of water inrush and facilitates the rapid investigation of the location of the water inrush.

[0038] The filter cylinder 301 of the present invention has a plurality of corresponding filter holes 4 evenly distributed on its bottom and side wall. The isolation cylinder 7 is movably sleeved on the side wall of the filter cylinder 301 to seal the filter holes on the upper part of the side wall of the filter cylinder 301, so that the water does not pass through the filter holes sealed by the isolation cylinder 7 during normal pumping, thus preventing the filter holes from being blocked. When the float 701 rises further until the pressure sensed by the pressure sensor 8 reaches the set value F2, the standby water pump 6 is started to perform drainage operation. At this time, the filter holes sealed by the isolation cylinder 7 are also opened to significantly increase the rate at which water enters the filter cylinder 301, thereby effectively helping to improve the drainage rate of the water.

[0039] The sudden water inrush sealing mechanism of the present invention includes a mobile vehicle 10 housed in a housing 3. The mobile vehicle 10 is provided with a limiting guide rod 12 driven by a first hydraulic cylinder 11. The limiting guide rod 12 is hollow and movably connected to a push rod 13, which is driven by a second hydraulic cylinder 14. The bottom of the push rod 13 extends to the bottom side of the limiting guide rod 12 and is detachably mounted with a sealing assembly 15. The sealing assembly 15 is composed of a set of sealing plates arranged at different heights, and several corresponding insertion rods 16 are oscillatingly mounted on the upper sealing plate. During the sealing process, the first hydraulic cylinder 11 drives the limiting guide rod 12 and the jacking rod 13 downwards to press the sealing assembly 15 down to the location of the sudden water inrush. Then, the second hydraulic cylinder 14 drives the jacking rod 13 upwards, causing the insertion rod 16 to be tilted outwards and inserted into the soil layer at the location of the sudden water inrush under the guidance of the limiting guide rod 12. This effectively pressurizes and seals the sealing assembly 15 into place. Under the relative movement of the sealing assembly 15 and the limiting guide rod 12, the insertion rod 16 is driven outwards to tilt and insert into the soil layer at the location of the sudden water inrush, thereby improving the support effect of the sealing assembly 15 and effectively and reliably sealing the sudden water inrush.

[0040] The diameter of the sealing plate of the present invention is larger than the diameter of the limiting guide rod 12, so as to ensure that the limiting guide rod 12 does not form frictional contact with the soil layer during the pressurized downward process of the sealing assembly 15, thereby reducing the resistance of the pressurized downward process of the sealing assembly 15 and improving the practical effect of the present invention.

[0041] The cylinder body of the first hydraulic cylinder 11 is fixedly mounted on the mobile vehicle body 10. The piston rod end of the first hydraulic cylinder 11 is arranged upward and fixedly connected to a corresponding moving plate 19. The top of the limiting guide rod 12 is fixedly connected to the moving plate 19. The second hydraulic cylinder 14 is fixedly mounted on the upper side of the moving plate 19 by a corresponding bracket 20. The push rod 13 is fixedly connected to the piston rod end of the second hydraulic cylinder 14. In this way, the extension and retraction of the first hydraulic cylinder 11 can synchronously drive the limiting guide rod 12 and the push rod 13, and then the second hydraulic cylinder 14 can drive the push rod 13 separately, so as to further ensure the effectiveness of the invention.

[0042] The bottom side of the limiting guide rod 12 is arc-shaped to ensure that it can smoothly guide the insertion rod 16 to swing outward. The bottom end of the lower sealing plate is pointed to help improve the downward smoothness of the sealing assembly 15. The middle of the upper sealing plate is provided with a corresponding mounting hole. The bottom of the push rod 13 is inserted into the mounting hole, and a fixing plate 21 located above the mounting hole and an elastic rubber plate 22 located below the mounting hole are fixed to the push rod 13. Under the action of the fixing plate 21, the insertion rod 13 is guided to swing outward. The push rod 13 can effectively exert sufficient downward pressure on the sealing plate located at the top, i.e., the sealing assembly 15. Under the action of the elastic rubber plate 22, the sealing plate located at the top can be effectively driven smoothly to abut against the limiting guide rod 12 to ensure smooth driving of the insertion rod 16. As the push rod 13 continues to move upward, the elastic rubber plate 22 is squeezed into the hollow part of the limiting guide rod 12 and leaves the hollow part of the limiting guide rod 12 as the push rod 13 continues to move upward, so as to further ensure the practical effect of the present invention.

[0043] The inner ends of the insertion rods 16 can be swung and installed onto the upper sealing plate, and corresponding support elastic members 23 are fixedly installed between the insertion rods 16 and the upper sealing plate, and the outer ends of the insertion rods 16 are respectively pointed.

[0044] The piston rod of the first hydraulic cylinder 11 retracts to drive the moving plate 19 downward, and the limiting guide rod 12, the push rod 13, and the sealing assembly 15 are pressed down below the ground to seal the sudden water inrush; then, the second hydraulic cylinder 14 drives the push rod 13 upward to push the insertion rods 16 outward under the guidance of the limiting guide rod 12 and insert them into the corresponding soil layers, and the supporting elastic member 23 is compressed; after the sealing plate located at the upper part abuts against the limiting guide rod 12, the elastic rubber plate 22 is squeezed into the hollow part of the limiting guide rod 12 and leaves the hollow part of the limiting guide rod 12 as the push rod 13 continues to move upward.

[0045] The mobile vehicle body 10 is movably equipped with corresponding grouting pipes 24. The inlet end of the grouting pipe 24 is pumped in parallel to the corresponding quick-drying agent source 25 and cement slurry source 26. After the push rod 13 completely leaves the hollow part of the limiting guide rod 12, the outlet end of the grouting pipe 24 is manually extended through to the upper sealing plate, and the quick-drying agent and cement slurry are mixed and transported into the spaced-apart sealing plates by pumping. After the elastic rubber plate 22 leaves the hollow part of the limiting guide rod 12 along with the push rod 13, the outlet end of the grouting pipe 24 is manually extended through to the upper sealing plate, and the quick-drying agent and cement slurry are mixed and transported into the spaced-apart sealing plates by pumping, so as to form a second sealing reinforcement between the spaced-apart sealing plates and further increase the sealing firmness of the sealing component 15.

[0046] Several evenly distributed arc-shaped hanging rods 27 are fixed to the upper end face of the sealing plate located at the bottom. The intervention of the arc-shaped hanging rods 27 improves the integrity between the solidified cement slurry block and the sealing component 15, thereby helping to improve the sealing firmness of the two against the sudden water inrush.

[0047] Example 2 refer to Figure 5 A construction method for a deep foundation pit water inrush sealing device with early warning function, based on the deep foundation pit water inrush sealing device with early warning function described in Embodiment 1 above, includes the following specific steps: S1, hoist the box 3 into place, so that its filter cylinder 301 extends into the lower side of the water collection well 2; S2, transport the sudden water inrush sealing mechanism and fix it into the box 3 for later use; S3, when the pressure sensed by the pressure sensor 8 reaches the set value F1, the water pump 5 starts to drain water; S4, when the pressure sensed by the pressure sensor 8 reaches the set value F2, the backup water pump 6 starts to drain water and sends an early warning signal to the outside through the control signal transmission module of the corresponding electrical controller 18. After the early warning signal is obtained at the signal receiving end, the mobile vehicle 10 of the sudden water inrush sealing mechanism is manually driven to the location of the sudden water inrush to carry out the water inrush sealing operation.

[0048] The construction method described in this second embodiment can effectively, quickly, and accurately provide early warning of the occurrence of sudden water inrush, and can also effectively and reliably seal off the sudden water inrush.

[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for sealing sudden water inrush in deep foundation pits with early warning function, characterized in that, include: A multi-functional drainage mechanism includes a drainage ditch (1) set on the ground of the foundation pit and a collection well (2) for collecting the drainage from the drainage ditch (1). A box (3) is placed on the upper side of the collection well (2). A filter cylinder (301) extending to the lower side of the collection well (2) is provided at the bottom of the box (3). A plurality of corresponding filter holes (4) are evenly distributed on the bottom and side wall of the filter cylinder (301). A pump is installed inside the box (3) for pumping water into the filter cylinder (301). The filter cylinder (301) has a pump (5) for pumping water and a standby pump (6) for pumping water. A corresponding isolation cylinder (7) is movably sleeved on the side wall of the filter cylinder (301). A float (701) is fixedly connected to the top of the isolation cylinder (7). A fixed flange (3011) is provided on the top of the filter cylinder (301). Several pressure sensors (8) are installed at intervals on the bottom of the fixed flange (3011). Several connecting springs (9) that abut against the pressure sensors (8) are installed at intervals on the upper part of the float (701). The sudden water inrush sealing mechanism includes a mobile vehicle (10) housed within the housing (3). The mobile vehicle (10) is equipped with a limiting guide rod (12) driven by a first hydraulic cylinder (11). The limiting guide rod (12) is hollow and movably connected to a corresponding push rod (13). The push rod (13) is driven by a second hydraulic cylinder (14). The bottom of the push rod (13) extends to the bottom side of the limiting guide rod (12) and is detachably fitted with a corresponding sealing assembly (15). The sealing assembly (15) consists of a set of high and low intervals. The sealing plate is configured such that its diameter is larger than that of the limiting guide rod (12), and several corresponding insertion rods (16) are oscillatingly installed on the upper sealing plate. The first oil cylinder (11) drives the limiting guide rod (12) and the push rod (13) to move downward to press the sealing assembly (15) down to the location of the sudden water inrush. Then, the second oil cylinder (14) drives the push rod (13) to move upward to insert the insertion rods (16) into the soil layer at the location of the sudden water inrush under the guidance of the limiting guide rod (12).

2. The deep foundation pit sudden water inrush sealing device with early warning function according to claim 1, characterized in that, The fixed flange (3011) is fixed downwards with a set of guide shafts (17) for guiding the float (701). As the water level in the collection well (2) rises, the float (701) moves upwards and drives the connecting spring (9) to abut against the corresponding pressure sensor (8). When the pressure sensed by the pressure sensor (8) reaches the set value F1, the water pump (5) starts to drain water.

3. The deep foundation pit sudden water inrush sealing device with early warning function according to claim 2, characterized in that, When the pressure sensed by the pressure sensor (8) reaches the set value F2, the standby water pump (6) starts to drain water and sends an early warning signal to the outside through the control signal transmission module of the corresponding electrical controller (18), where F2 > F1.

4. The deep foundation pit sudden water inrush sealing device with early warning function according to claim 1, characterized in that, The cylinder body of the first oil cylinder (11) is fixedly installed on the mobile vehicle body (10). The piston rod end of the first oil cylinder (11) is set upward and fixedly connected to a corresponding moving plate (19). The top of the limiting guide rod (12) is fixedly connected to the moving plate (19). The second oil cylinder (14) is fixedly installed on the upper side of the moving plate (19) through a corresponding bracket (20). The push rod (13) is fixedly connected to the piston rod end of the second oil cylinder (14).

5. A deep foundation pit sudden water inrush sealing device with early warning function according to claim 4, characterized in that, The bottom side of the limiting guide rod (12) is arc-shaped, the bottom end of the sealing plate at the bottom is pointed, and the middle of the sealing plate at the top is provided with a corresponding mounting hole. The bottom of the push rod (13) is inserted into the mounting hole, and a fixing plate (21) located on the upper side of the mounting hole and an elastic rubber plate (22) located on the lower side of the mounting hole are fixedly connected to the push rod (13).

6. A deep foundation pit sudden water inrush sealing device with early warning function according to claim 5, characterized in that, The inner ends of the insertion rods (16) can be swung and installed on the upper sealing plate, and corresponding support elastic members (23) are fixedly installed between the insertion rods (16) and the upper sealing plate, and the outer ends of the insertion rods (16) are respectively pointed.

7. A deep foundation pit sudden water inrush sealing device with early warning function according to claim 6, characterized in that, The piston rod of the first cylinder (11) retracts to drive the moving plate (19) downward, and the limiting guide rod (12), the push rod (13) and the sealing assembly (15) are pressed down below the ground to seal the sudden water inrush; then, the second cylinder (14) drives the push rod (13) upward to drive the insertion rod (16) to be inserted into the corresponding soil layer under the guidance of the limiting guide rod (12), and the supporting elastic member (23) is compressed; after the sealing plate located at the upper part abuts against the limiting guide rod (12), the elastic rubber plate (22) is squeezed into the hollow part of the limiting guide rod (12) and leaves the hollow part of the limiting guide rod (12) as the push rod (13) continues to move upward.

8. A deep foundation pit sudden water inrush sealing device with early warning function according to claim 7, characterized in that, The mobile vehicle body (10) is equipped with a corresponding grouting pipe (24). The feed end of the grouting pipe (24) is connected in parallel to the corresponding quick-drying agent source (25) and cement slurry source (26). After the push rod (13) leaves the hollow part of the limiting guide rod (12) as a whole, the discharge end of the grouting pipe (24) is extended through the upper sealing plate by manual operation, and the quick-drying agent and cement slurry are mixed and transported into the spaced sealing plates by pumping.

9. A deep foundation pit sudden water inrush sealing device with early warning function according to claim 8, characterized in that, Several evenly distributed arc-shaped hanging rods (27) are fixed to the upper end face of the sealing plate located at the bottom.

10. A construction method for a deep foundation pit sudden water inrush sealing device with early warning function, based on the deep foundation pit sudden water inrush sealing device with early warning function as described in any one of claims 1-9, characterized in that, It includes the following specific steps: S1, hoist the box (3) into place so that its filter cylinder (301) extends into the lower side of the water collection well (2); S2, transport the sudden water inrush sealing mechanism and fix it into the box (3) for later use; S3, when the pressure sensed by the pressure sensor (8) reaches the set value F1, the water pump (5) starts to drain water; S4, when the pressure sensed by the pressure sensor (8) reaches the set value F2, the standby water pump (6) starts to drain water and sends an early warning signal to the outside through the corresponding electrical controller (18) control signal transmission module. After the early warning signal is obtained at the signal receiving end, the mobile vehicle (10) of the sudden water blocking mechanism is manually driven to the location of the sudden water to carry out the water blocking operation.

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