Cast-in-place pile hole water gushing plugging device and coring hole plugging method
By designing the water inrush sealing device for the pouring pile hole, the airbag is used to fit the inner wall of the core hole, and combined with the design of the drainage and grouting pipe, the water inrush problem of the core hole is solved, achieving smooth solidification of the slurry and improving the sealing efficiency.
Patent Information
- Application Number
- CN202510303329.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-05-13
AI Technical Summary
The prior art is difficult to quickly and conveniently solve the problem of water inflow of core holes, which makes it difficult for the slurry to solidify, affecting the construction period and may bring about settlement risks.
A water-inflow sealing device for pouring pile holes is designed, including end caps, fixing devices, cylinder cores, drainage pipes, grouting pipes, airbags and inflation parts. The airbag inflation is tightly fitted with the inner wall of the core hole, and combined with the design of drainage and grouting pipes, the outflow and inflow of groundwater and slurry are controlled to ensure smooth consolidation of slurry in the pile holes.
It quickly suppresses groundwater surges, ensures smooth solidification of slurry, improves the efficiency of sealing work, reduces waste of slurry, and is suitable for pile holes of various sizes.
Smart Images
Figure CN119981035A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of cast-in-place piles, and specifically designs a water gushing plugging device for a cast-in-place pile hole and a plugging method for a core hole. Background Art
[0002] Bored cast-in-place piles are widely used in the foundations of structural engineering projects such as highways, railway bridges, etc. Drilling and coring is one of the most important methods for testing the quality of the pile body. However, due to the existence of underground pressurized water and other conditions, water gushing from the coring holes may occur.
[0003] The core hole is usually sealed by cement grouting, that is, a grouting pipe is inserted into the bottom of the core hole, and grouting is continued until the slurry overflows from the core hole. However, when water gushes out of the core hole, a large amount of slurry is lost and it is difficult to achieve the expected sealing effect. The cement slurry is difficult to solidify after injection, and the core hole cannot be sealed in time. Grouting can only be carried out after the core hole is depressurized by drainage. Not only does it affect the construction period, but the core hole also lowers the surrounding groundwater level at this time, which may bring settlement risks to surrounding buildings. If the chemical grouting method using polymer slurry is used, the price of the slurry is relatively high, and there is also the problem that the slurry cannot solidify when water gushes out, which makes it difficult to promote and use it on a large scale in actual work.
[0004] It can be seen that there is no method to quickly and conveniently solve the problem of water gushing from the core holes. Summary of the invention
[0005] In order to solve the above technical problems, the present invention provides a bored pile hole water gushing plugging device and a plugging method thereof. The device of the present application can fit tightly with the pile hole, so that the groundwater is no longer in a gushing state, ensuring that the injected slurry is smoothly consolidated in the pile hole, with simple operation and high work efficiency.
[0006] The present invention provides the following technical solution: a water gushing plugging device for a bored pile hole, comprising: an end cover, a fixing device, a cylinder core, a drainage pipe, a grouting pipe, an air bag and an inflatable part;
[0007] The end cover is used to seal the top of the core hole, and the end cover is provided with drainage holes and grouting holes passing through the upper and lower end surfaces at intervals;
[0008] The fixing device is installed on the peripheral side of the end cover, and the fixing device is used to connect to the pile body at the periphery of the core hole;
[0009] The barrel core is fixedly connected to the bottom end of the end cover and is used to be inserted into the coring hole. The barrel core is provided with a drainage channel and a grouting channel that pass through the upper and lower ends of the barrel core. The drainage pipe passes through the drainage hole and the drainage channel in sequence from top to bottom. The grouting pipe passes through the grouting hole and the grouting channel in sequence from top to bottom. The top ends of the drainage pipe and the grouting pipe are both protruding from the top end of the end cover.
[0010] The airbag is sleeved on the outer circumference of the tube core and connected to the bottom end of the end cover. The inflation portion is penetrated through the upper and lower ends of the end cover. The inflation portion is communicated with the airbag and is used to inflate the airbag.
[0011] Preferably, the cylinder core comprises a frame and a rubber piece sleeved on the outer circumference of the frame, the drainage channel and the grouting channel pass through the upper and lower ends of the rubber piece, and the airbag is sleeved on the outer circumference of the rubber piece.
[0012] Preferably, the skeleton is an I-beam, and the drainage channel and the grouting channel are symmetrically distributed on both sides of the waist of the I-beam.
[0013] Preferably, the center distance between the drainage channel and the grouting channel is not less than the flange width of the I-beam.
[0014] Preferably, a throttle valve is provided on the drain pipe, and the throttle valve is arranged to protrude from the top end of the end cover.
[0015] Preferably, a pressure pump is provided on the grouting pipe, and the pressure pump is arranged to protrude from the top end of the end cover.
[0016] Preferably, the fixing device comprises a plurality of connecting tubes, which are circumferentially spaced apart on the outer periphery of the end cover, one end of the connecting tube is connected to the end cover, and the other end is provided with a connecting portion for connecting to the pile body on the outer periphery of the core hole.
[0017] Preferably, the connecting tube is a telescopic tube.
[0018] Preferably, the bottom end of the grouting pipe is flush with the bottom end of the coring hole, and the bottom end of the drainage pipe is flush with the bottom end of the barrel core.
[0019] The present application also provides a method for plugging a coring hole, comprising:
[0020] S1. Install the connecting pipe on the outer periphery of the end cover, install the cylinder core on the bottom end of the end cover, and align the drainage channel with the drainage hole, align the grouting channel with the grouting hole, install the airbag on the bottom end of the end cover, and sleeve it on the outer periphery of the cylinder core, connect the inflation part with the airbag and install it on the end cover, and complete the installation of the end cover;
[0021] S2, placing the installed end cap on the top of the coring hole, adjusting the length of the connecting pipe and fixing the end cap to the pile body at the outer periphery of the coring hole through the connecting part, inserting the drainage pipe into the drainage hole and the drainage channel from top to bottom, inserting the grouting pipe into the grouting hole and the grouting channel from top to bottom, and completing the installation of the cast-in-place pile hole water inrush plugging device in the coring hole;
[0022] S3, inflate the airbag through the inflation part until the expanded airbag is tightly attached to the inner wall of the coring hole, and then stop inflating;
[0023] S4. Adjust the throttle valve to allow groundwater to be discharged from the core hole through the drainage pipe, and the slurry to enter the core hole through the grouting pipe. Control the pressure of the pressure pump to match the slurry injection volume with the groundwater discharge volume. When the return slurry volume at the outlet of the drainage pipe is greater than 20% of the grouting volume of the grouting pipe, stop grouting.
[0024] S5. After the slurry solidifies, the plugging is completed, the connection between the connecting part and the pile body around the core hole is released, and the water inrush plugging device for the bored pile hole except the grouting pipe is removed. The beneficial effects of the present invention are:
[0025] The operation is simple. One only needs to put the device of the present application into the pile hole and fix it to the pile body at the periphery of the core hole through a fixing device. After the airbag is inflated by the inflation part, it fits tightly with the inner wall of the core hole, and the upwelling of groundwater can be quickly suppressed. The inflated airbag squeezes the tube core, so that the inner walls of the drainage channel and the grouting channel fit tightly with the outer walls of the drainage pipe and the grouting pipe, further preventing water leakage, and at the same time facilitating the smooth solidification of the slurry at the grouting part, reducing the waste of slurry and improving the efficiency of the plugging work. The inflation part is inflated to control the expansion degree of the airbag, so that the bored pile hole water-gushing plugging device can be flexibly applied to pile holes of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the airbag of the bored pile hole water inrush plugging device before inflation;
[0027] Figure 2 This is a schematic diagram of the completion of inflation of the airbag of the bored pile hole water inrush plugging device of this application;
[0028] Figure 3 This is a cross-sectional diagram of the completed plugging of the water inrush plugging device for the bored pile hole in this application;
[0029] Figure 4 This is a cross-sectional schematic diagram of the water inrush plugging device for the bored pile hole of this application;
[0030] Figure 5 This is a schematic plan view of the water inrush plugging device for the bored pile hole of this application;
[0031] Figure 6 for Figure 1 AA cross-sectional structural schematic diagram shown;
[0032] Figure 7 for Figure 2 BB cross-sectional structural schematic diagram shown.
[0033] In the figure:
[0034] 1. End cover; 11. Drain hole; 12. Grouting hole; 2. Fixing device; 21. Connecting pipe; 211. Connecting part; 3. Core; 31. Drain channel; 32. Grouting channel; 33. Frame; 34. Rubber part; 4. Drain pipe; 41. Throttle valve; 5. Grouting pipe; 51. Pressure pump; 6. Air bag; 7. Inflating part; 8. Coring hole. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0036] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0037] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0038] Combination Figure 1-7As shown, a device for plugging water inflow from a bored pile hole comprises: an end cap 1, a fixing device 2, a core 3, a drainage pipe 4, a grouting pipe 5, an air bag 6 and an inflatable part 7; the end cap 1 is used to seal the top of a coring hole 8, and the end cap 1 is provided with drainage holes 11 and grouting holes 12 passing through the upper and lower end surfaces at intervals; the fixing device 2 is installed on the peripheral side of the end cap 1, and the fixing device 2 is used to connect to the pile body at the outer periphery of the coring hole 8; the core 3 is fixedly connected to the bottom end of the end cap 1, and is used to be inserted into the coring hole 8, and the core 3 is provided with a gas bag 6 passing through the upper and lower end surfaces of the core 3 at intervals. The drainage channel 31 and the grouting channel 32 are at the lower ends, the drainage pipe 4 passes through the drainage hole 11 and the drainage channel 31 from top to bottom in sequence, the grouting pipe 5 passes through the grouting hole 12 and the grouting channel 32 in sequence from top to bottom, and the top ends of the drainage pipe 4 and the grouting pipe 5 are both protruding from the top end of the end cover 1; the airbag 6 is sleeved on the outer periphery of the barrel core 3 and connected to the bottom end of the end cover 1, the inflation part 7 is penetrated at the upper and lower ends of the end cover 1, and the inflation part 7 is communicated with the airbag 6 for inflating the airbag 6.
[0039] Exemplarily, the end cap 1 is a steel end cap 1, and a drainage hole 11 and a grouting hole 12 are provided in the middle of the end cap 1. The end cap 1, the tube core 3 and the air bag 6 cover the part to be grouted. The pressure of the end cap 1 allows the tube core 3 and the air bag 6 to sink smoothly into the coring hole 8, and the end cap 1 is fixed to the pile body on the outer periphery of the coring hole 8 by the fixing device 2. The inflation part 7 includes an inflation valve and an inflation pipe, which is provided at the upper and lower ends of the end cap 1, and the bottom end of the inflation pipe is connected to the air bag 6. The inflation valve is fixed to the top end of the end cap 1 and is connected to the top end of the inflation pipe, and the inflation valve is provided on the outer edge of the drainage hole 11 or the grouting hole 12. The elastic modulus of the material used for the air bag 6 is 1.7Mpa to 2.3Mpa. The drain pipe 4 is inserted into the drain channel 31 through the drain hole 11, and the grouting pipe 5 is inserted into the grouting channel 32 through the grouting hole 12. When the air bag 6 is not inflated, there are gaps between the outer walls of the drain pipe 4 and the grouting pipe 5 and the inner walls of the drain channel 31 and the grouting channel 32. The inflation valve inflates the air bag 6 in the core hole 8 through the inflation pipe, and the air bag 6 expands to fit closely with the inner wall of the core hole 8, which has the effect of quickly suppressing the surge of groundwater; at the same time, the air bag 6 expands and squeezes the cylinder core 3, so that the grouting pipe 5 and the drain pipe 4 are in close contact with the inner walls of the drain channel 31 and the grouting channel 32, respectively, eliminating the contact gap, solving the problem of no covering layer in the gushing of groundwater and the grouting treatment part in the prior art, and further preventing the occurrence of water leakage. At this time, the groundwater flows out of the core hole 8 through the drain pipe 4.
[0040] Before grouting the grouting pipe 5, adjust the pressure at the outlet of the drainage pipe 4 and the pressure of the pumped slurry to match the amount of slurry injected with the amount of groundwater discharged, and prevent the grouting speed from being too fast, resulting in the grouting pressure injection volume failing to fill the dense gap. This provides a guarantee for the solidification of the slurry and improves the efficiency of water gushing and plugging of the core hole 8. When the drainage pipe 4 begins to return to the grouting phenomenon, the grouting can be stopped, and the slurry will eventually solidify and the core hole 8 will be plugged. Loosen the fixing device 2 fixed to the pile body steel bars on the periphery of the core hole 8, and remove the bored pile hole water gushing and plugging device. Except for a section of the grouting pipe 5 inserted into the device, the bored pile hole water gushing and plugging device and other parts can be reused, which is green and environmentally friendly.
[0041] In some embodiments, the cylinder core 3 includes a skeleton 33 and a rubber member 34 sleeved on the outer periphery of the skeleton 33, the drainage channel 31 and the grouting channel 32 pass through the upper and lower ends of the rubber member 34, and the airbag 6 is sleeved on the outer periphery of the rubber member 34. The rigidity of the cylinder core 3 is improved so that the cylinder core 3 can withstand the expansion and extrusion of the airbag 6. For example, the steel end cap 1 and the steel skeleton 33 are cast in one piece, and the material density of the end cap 1 and the skeleton 33 is in the range of 7.8 g / cm 3 ~7.85g / cm 3 The elastic modulus ranges from 2.0×10 5 MPa~2.1×10 5 Mpa, and the elastic modulus of the rubber member 34 ranges from 1.0 MPa to 1.5 MPa.
[0042] In some embodiments, the skeleton 33 is an I-beam, and the drainage channel 31 and the grouting channel 32 are symmetrically distributed on both sides of the waist of the I-beam, which is conducive to uniform force on the core 3, improving the ability of the core 3 to restore to its original state after plugging, and facilitating the subsequent recycling of the device of the present application.
[0043] In some embodiments, the center distance between the drainage channel 31 and the grouting channel 32 is not less than the flange width of the I-beam. Figure 6 As shown, the flange width of the I-beam is L1, the center distance between the drainage channel 31 and the grouting channel 32 is L2, and L2≥L1, thereby ensuring the squeezing effect of the airbag 6 on the drainage channel 31 and the grouting channel 32 after inflation, so that the outer walls of the drainage pipe 4 and the grouting pipe 5 are tightly fitted with the inner walls of the drainage channel 31 and the grouting channel 32 respectively.
[0044] In some embodiments, a throttle valve 41 is provided on the drainage pipe 4, and the throttle valve 41 is arranged protruding from the top of the end cover 1. Exemplarily, the drainage pipe 4 extends in the vertical direction in the drainage channel 31, and the part protruding from the end cover 1 mainly extends in the horizontal direction. After the groundwater leaves the core hole 8 through the drainage pipe 4, it is drained above the ground, which is convenient for regulating the direction of drainage, and the throttle valve 41 can adjust and limit the flow rate and water pressure of the groundwater discharge, playing the role of pressure-limited drainage.
[0045] In some embodiments, a pressure pump 51 is provided on the grouting pipe 5, and the pressure pump 51 is arranged protruding from the top of the end cover 1. Exemplarily, the grouting pipe 5 extends in the vertical direction in the grouting channel 32, and the part protruding from the end cover 1 mainly extends in the horizontal direction, which is convenient for arranging the slurry conveying device and the pressure pump 51 above the core hole 8 or the ground. The pressure pump 51 can adjust the grouting pressure so that the slurry injection amount and the groundwater discharge amount match, and prevent the grouting speed from being too fast and the grouting amount cannot fill the dense gap, affecting the grouting effect.
[0046] In some embodiments, the fixing device 2 includes a plurality of connecting pipes 21, which are arranged at intervals on the periphery of the end cover 1 in the circumferential direction, one end of the connecting pipe 21 is connected to the end cover 1, and the other end is provided with a connecting portion 211 for connecting to the pile body at the periphery of the coring hole 8. Exemplarily, the connecting portion 211 is a hoop, and the end cover 1 is fixed by hooping the steel bars of the pile body at the periphery of the coring hole 8.
[0047] In some embodiments, the connecting tube 21 is a telescopic tube. Exemplarily, the end cap 1 is hinged with four telescopic tubes, and the telescopic tubes can be flexibly adjusted in length, so that the fixing device 2 is suitable for bored piles of most sizes.
[0048] In some embodiments, the bottom end of the grouting pipe 5 is flush with the bottom end of the core hole 8, and the bottom end of the drainage pipe 4 is flush with the bottom end of the barrel core 3. This is beneficial to control the slurry injection amount to match the groundwater discharge amount, realize the discharge of all groundwater in the core hole 8, and ensure the slurry plugging effect.
[0049] The present application also provides a method for plugging the coring hole 8, comprising:
[0050] S1. Install the connecting pipe 21 on the outer periphery of the end cover 1, install the cylinder core 3 on the bottom end of the end cover 1, and install the drainage channel 31 and the drainage hole 11 in the center, install the grouting channel 32 and the grouting hole 12 in the center, install the airbag 6 on the bottom end of the end cover 1, and sleeve it on the outer periphery of the cylinder core 3, connect the inflation part 7 with the airbag 6 and install it on the end cover 1, and complete the installation of the end cover 1;
[0051] S2, place the installed end cap 1 on the top of the coring hole 8, adjust the length of the connecting pipe 21 and fix the end cap 1 to the pile body at the periphery of the coring hole 8 through the connecting portion 211, insert the drainage pipe 4 into the drainage hole 11 and the drainage channel 31 from top to bottom, insert the grouting pipe 5 into the grouting hole 12 and the grouting channel 32 from top to bottom, and complete the installation of the cast-in-place pile hole water inrush plugging device in the coring hole 8;
[0052] S3, inflate the airbag 6 through the inflation unit 7 until the expanded airbag 6 is in close contact with the inner wall of the core hole 8, and then stop inflating;
[0053] S4, adjusting the throttle valve 41, so that the groundwater is discharged from the drain pipe 4 to the outside of the core hole 8, and the slurry enters the core hole 8 from the grouting pipe 5, and the pressure of the pressure pump 51 is controlled to control the slurry injection amount to match the groundwater discharge amount. When the return slurry amount at the outlet of the drain pipe 4 is greater than 20% of the grouting amount of the grouting pipe 5, stop grouting;
[0054] S5, after the slurry solidifies, the plugging is completed, the connection between the connecting portion 211 and the pile body around the core hole 8 is released, and the bored pile hole water inrush plugging device except the grouting pipe 5 is taken away.
[0055] Exemplarily, there are two circular cross-section channels with a diameter of 20 mm on the end cover 1 with a diameter of 200 mm and a thickness of 20 mm, which are the drainage channel 31 and the grouting channel 32. An inflation valve of the inflation part 7 is provided on the outer edge of one of the channels. The connecting pipe 21 of the fixing device 2 can be contracted to a minimum of 300 mm and a maximum of 900 mm. The connecting pipe 21 is hinged to the end cover 1. The airbag 6 is sleeved on the outer periphery of the cylinder core 3 and forms a compression assembly together with the cylinder core 3. The compression assembly has a diameter of 60 mm and a total length of 500 mm. The compression assembly is fixedly connected to the bottom end of the end cover 1, and the drainage channel 31 is installed in alignment with the drainage hole 11, and the grouting channel 32 is installed in alignment with the grouting hole 12. The end cover 1 at this time is placed at the top of the core hole 8, and is fixedly connected to the pile body on the outer periphery of the core hole 8 by adjusting the connecting part 211 at the end of the connecting pipe 21.
[0056] The drain pipe 4 is inserted into the drain hole 11 and the drain channel 31 from top to bottom, and the grouting pipe 5 is inserted into the grouting hole 12 and the grouting channel 32 from top to bottom. The bottom end of the inserted grouting pipe 5 is flush with the bottom end of the core hole 8, and the bottom end of the inserted drain pipe 4 is flush with the bottom end of the cylinder core 3. The drain pipe 4 and the grouting pipe 5 are turned above the core hole 8 through the transfer elbow. When the airbag 6 is not inflated, there are gaps between the outer walls of the drain pipe 4 and the grouting pipe 5 and the inner walls of the drain channel 31 and the grouting channel 32, and they are not tightly fitted.
[0057] The end cover 1 is provided with an inflation pipe having an inflation portion 7, so that air can pass through the inflation valve of the inflation portion 7 through the end cover 1 and enter the air bag 6. Figure 2 and Figure 7As shown, after the airbag 6 is inflated, it is closely attached to the inner wall of the core hole 8, and the groundwater in the core hole 8 no longer gushes. The pressure of the airbag 6 when inflated is slightly greater than the surrounding water pressure, which is 0.2-0.5MPa.
[0058] The throttle valve 41 is used for pressure-limited drainage, and the groundwater is discharged from the core hole 8 through the drainage pipe 4. The grouting pressure is controlled by the pressure pump 51, and the slurry enters the core hole 8 through the grouting pipe 5. The slurry injection volume is controlled to match the groundwater discharge volume to prevent the grouting speed from being too fast, resulting in the grouting pressure injection volume failing to fill the dense gap. Among them, the slurry adopts cement-water glass double liquid slurry, the water-cement ratio of the slurry ratio is 0.8-1:1, cement slurry: water glass = 1:1, and the water glass adopts high-quality water glass with a Baume degree of more than 35. The gel time of the slurry is 40-60s. When the slurry returns at the outlet of the drainage pipe 4, and the amount of slurry returned at the outlet is greater than 20% of the grouting amount, the grouting is stopped. At this time, the core hole 8 is full of slurry and there is no excess groundwater.
[0059] like Figure 3 As shown, after the slurry solidifies, the purpose of plugging is achieved. The device can be taken away by loosening the connection portion 211 that is fastened to the pile body of the core hole 8. Except for the grouting pipe 5 that is fixed in the core hole 8, the device and other parts can be reused.
[0060] The above steps are simple and easy to operate. The core hole 8 is grouting and plugging, which effectively solves the water gushing problem. By reasonably adjusting the drainage volume and grouting volume, the waste of slurry is reduced and the efficiency of the plugging work is improved. The inflation valve controls the expansion degree of the airbag 6, and the connecting pipe 21 can flexibly adjust the length, so that the bored pile hole water gushing plugging device can adapt to most sizes of bored piles, which is conducive to the reuse of the bored pile hole water gushing plugging device and achieves the purpose of green environmental protection.
[0061] This specification discloses the present application with reference to the accompanying drawings, and also enables those skilled in the art to implement the present application, including making and using any device or system, using suitable materials, and using any combined method. The scope of the present application is defined by the technical solution for protection, and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the technical solution for protection, or such other examples contain equivalent structural elements that are not substantially different from the literal language of the technical solution for protection, such other examples should be considered to be within the scope of protection determined by the technical solution for protection of the present application.
Claims
1. A device for plugging water inflow from a bored pile hole, characterized in that: include: End caps, fixing devices, cores, drain pipes, grouting pipes, air bags and inflatable parts; The end cover is used to seal the top of the core hole, and the end cover is provided with drainage holes and grouting holes passing through the upper and lower end surfaces at intervals; The fixing device is installed on the peripheral side of the end cover, and the fixing device is used to connect to the pile body at the periphery of the core hole; The barrel core is fixedly connected to the bottom end of the end cover and is used to be inserted into the coring hole. The barrel core is provided with a drainage channel and a grouting channel that pass through the upper and lower ends of the barrel core. The drainage pipe passes through the drainage hole and the drainage channel in sequence from top to bottom. The grouting pipe passes through the grouting hole and the grouting channel in sequence from top to bottom. The top ends of the drainage pipe and the grouting pipe are both protruding from the top end of the end cover. The airbag is sleeved on the outer circumference of the tube core and connected to the bottom end of the end cover. The inflation portion is penetrated through the upper and lower ends of the end cover. The inflation portion is communicated with the airbag and is used to inflate the airbag.
2. The water gushing plugging device for bored pile holes according to claim 1, characterized in that: The cylinder core comprises a frame and a rubber piece sleeved on the outer periphery of the frame, the drainage channel and the grouting channel penetrate the upper and lower ends of the rubber piece, and the airbag is sleeved on the outer periphery of the rubber piece.
3. The water gushing plugging device for bored pile holes according to claim 2, characterized in that: The frame is an I-beam, and the drainage channel and the grouting channel are symmetrically distributed on both sides of the waist of the I-beam.
4. The water gushing plugging device for bored pile holes according to claim 3, characterized in that: The center distance between the drainage channel and the grouting channel is not less than the flange width of the I-beam.
5. The bored pile hole water gushing plugging device according to claim 1, characterized in that: The drain pipe is provided with a throttle valve, and the throttle valve is arranged protruding from the top end of the end cover.
6. The water gushing plugging device for bored pile holes according to claim 1, characterized in that: The grouting pipe is provided with a pressure pump, and the pressure pump is arranged protruding from the top end of the end cover.
7. The device for plugging water inflow from a bored pile hole according to claim 1, characterized in that: The fixing device comprises a plurality of connecting pipes which are arranged at intervals around the outer periphery of the end cover. One end of the connecting pipe is connected to the end cover, and the other end is provided with a connecting portion for connecting to a pile body around the outer periphery of the core hole.
8. The device for plugging water inflow from a bored pile hole according to claim 7, characterized in that: The connecting pipe is a telescopic pipe.
9. The water gushing plugging device for bored pile holes according to claim 1, characterized in that: The bottom end of the grouting pipe is flush with the bottom end of the coring hole, and the bottom end of the drainage pipe is flush with the bottom end of the barrel core.
10. A method for plugging a core hole, characterized in that: include: S1. Install the connecting pipe on the outer periphery of the end cover, install the cylinder core on the bottom end of the end cover, and align the drainage channel with the drainage hole, align the grouting channel with the grouting hole, install the airbag on the bottom end of the end cover, and sleeve it on the outer periphery of the cylinder core, connect the inflation part with the airbag and install it on the end cover, and complete the installation of the end cover; S2, placing the installed end cap on the top of the coring hole, adjusting the length of the connecting pipe and fixing the end cap to the pile body at the outer periphery of the coring hole through the connecting part, inserting the drainage pipe into the drainage hole and the drainage channel from top to bottom, inserting the grouting pipe into the grouting hole and the grouting channel from top to bottom, and completing the installation of the cast-in-place pile hole water inrush plugging device in the coring hole; S3, inflate the airbag through the inflation part until the expanded airbag is tightly attached to the inner wall of the coring hole, and then stop inflating; S4. Adjust the throttle valve to allow groundwater to be discharged from the core hole through the drainage pipe, and the slurry to enter the core hole through the grouting pipe. Control the pressure of the pressure pump to match the slurry injection volume with the groundwater discharge volume. When the return slurry volume at the outlet of the drainage pipe is greater than 20% of the grouting volume of the grouting pipe, stop grouting. S5. After the slurry solidifies, the plugging is completed, the connection between the connecting part and the pile body around the core hole is released, and the water inrush plugging device of the bored pile hole except the grouting pipe is taken away.