Single-point settlement monitoring backfill device and backfill method

Abstract

The application discloses a kind of single point settlement monitoring backfill device and backfill method, its backfill device includes liquid pump assembly, and the slurry suction end of liquid pump assembly is connected with filling slurry stirring container by pipeline, and the slurry discharge end of liquid pump assembly is connected with the top of connecting rod by pipeline, and the bottom of connecting rod is provided with slurry discharge hole.Its backfill method includes the following steps: drilling monitoring hole;Temporary hole sealing;Enlarging aperture to form top anchoring end backfill groove;Excavation monitoring hole residual slurry discharge groove;Cancel temporary hole sealing;Open slurry discharge hole;Connecting rod is composed;Connecting rod is loaded into monitoring hole;Liquid pump assembly is connected;Install filling slurry stirring container;Carry out anti-seepage protection treatment;Configuration filling slurry;Injection filling slurry;Clean slurry;Observe overflow condition;Install displacement sensor;Carry out equipment debugging and on-site protection.The application can guarantee that monitoring hole is backfilled densely, and improve monitoring data reliability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of backfilling of settlement monitoring, and particularly relates to a single-point settlement monitoring backfilling device and a backfilling method. BACKGROUND

[0002] The single-point settlement meter is widely used for road foundation settlement monitoring, and the monitoring result is an important basis for high-speed railway road foundation settlement evaluation. According to a large number of field tests, when the drill hole is deep or there is more residual mud in the hole, problems such as long sedimentation time of residual mud in the hole, poor compactness of residual mud after sedimentation, and difficult cleaning of residual mud often occur.

[0003] During the installation process of the single-point settlement meter, the residual mud needs to be cleaned and the drill hole needs to be backfilled. At present, there is no good cleaning and backfilling method, and the general method is not to clean and directly backfill from the top down, which is difficult to achieve the effect of compact backfilling of the drill hole.

[0004] In addition, when the bottom anchoring end of the single-point settlement meter is in a suspended state due to the influence of the buoyancy and viscous force of the residual mud, it cannot reach the bottom of the hole in time and it is difficult to achieve bottom anchoring, which affects the stability time of the monitoring hole and the monitoring effect. SUMMARY

[0005] The application is proposed to solve the problems in the prior art, and aims to provide a single-point settlement monitoring backfilling device and a backfilling method.

[0006] The technical scheme of the application is as follows: a single-point settlement monitoring backfilling device, comprising a settlement monitoring foundation, a top anchoring end is arranged in the settlement monitoring foundation, a monitoring hole is formed at the lower end of the top anchoring end, a displacement sensor is arranged in the monitoring hole, the lower end of the displacement sensor is connected to a joint of a connecting rod, and a slurry discharge hole for discharging mud is arranged at the lower end of the connecting rod.

[0007] Further, the connecting rod is a plurality of connecting pipes, and the slurry discharge hole is arranged at the outer wall of the lowermost connecting pipe.

[0008] Further, the outer wall of the lowermost connecting pipe is connected to the bottom anchoring end.

[0009] Further, the connecting pipes are coaxially connected through connecting pipe hoops, and the outer diameter of the connecting pipe hoop is smaller than the inner diameter of the monitoring hole.

[0010] Further, a filling slurry cleaning interface is formed in the monitoring hole, filling slurry is filled below the filling slurry cleaning interface, and medium-coarse sand or foundation soil is filled above the filling slurry cleaning interface to the bottom of the backfilling groove of the top anchoring end after the displacement sensor is installed, so as to ensure that the top anchoring end connected to the displacement sensor and the surface soil of the foundation can deform coordinately.

[0011] Further, the top anchoring end is arranged in a top anchoring end backfill groove filled with top anchoring end backfill material.

[0012] Further, the top anchoring end backfill groove is provided with a transverse monitoring hole residual slurry discharge groove.

[0013] Further, the monitoring hole residual slurry discharge groove is capable of discharging residual slurry from the monitoring hole after injecting the slurry through the slurry discharge hole.

[0014] Further, the settlement monitoring foundation is further provided with a slurry filling and stirring container for containing the slurry, and a liquid pump assembly arranged at the slurry filling and stirring container for delivering the slurry.

[0015] A backfill method of a single-point settlement monitoring backfill device, comprising the following steps:

[0016] A. Drilling a monitoring hole in a settlement monitoring foundation;

[0017] B. Temporarily sealing the obtained monitoring hole;

[0018] C. Enlarging the hole of the monitoring hole to form a top anchoring end backfill groove;

[0019] D. Excavating a monitoring hole residual slurry discharge groove at the top anchoring end backfill groove;

[0020] E. Removing the temporary sealing;

[0021] F. Opening a slurry discharge hole at the outer wall of the lowermost connecting pipe;

[0022] G. Connecting the lowermost connecting pipe with the bottom anchoring end to form a connecting rod with other connecting pipes;

[0023] H. Arranging the connecting rod into the monitoring hole and centering the connecting rod to ensure that the top of the connecting rod protrudes out of the monitoring hole;

[0024] I. Connecting one end of the slurry discharge pipe with the upper end of the connecting rod and connecting one end of the slurry suction pipe with the coarse-grained aggregate filter;

[0025] J. Manufacturing or installing the slurry filling and stirring container;

[0026] K. If necessary, performing anti-seepage treatment at the bottom of the slurry filling and stirring container;

[0027] L. Preparing the slurry;

[0028] M. Connect the outlet and inlet of the liquid pump assembly to the other end of the slurry filling outlet pipe and the other end of the slurry filling inlet pipe respectively, and place the connected coarse aggregate filter at the bottom of the slurry filling stirring container;

[0029] N. Operate the liquid pump controller to inject the slurry filling into the monitoring hole through the connecting rod;

[0030] O. Clean the slurry discharged from the monitoring hole residual slurry discharge groove;

[0031] P. Observe whether the slurry filling overflows in the monitoring hole residual slurry discharge groove, if the slurry filling overflows, continue to perform step Q, if the slurry filling does not overflow, return to step O;

[0032] Q. Remove the liquid pump assembly;

[0033] R. Clean the slurry filling in the monitoring hole to the slurry filling cleaning interface;

[0034] S. Remove the excess connecting rod;

[0035] T. After installing the displacement sensor in the monitoring hole, compact the medium-coarse sand or foundation soil in the backfilling groove to the bottom surface of the top anchoring end backfilling groove;

[0036] U. Backfill the top anchoring end backfilling groove with plain concrete;

[0037] V. Perform equipment debugging and site protection.

[0038] The beneficial effects of the present application are as follows:

[0039] The present application transports the slurry filling outside the hole from the inside channel of the connecting rod from the top to the bottom by the high-pressure liquid pump, and discharges it from the slurry discharge hole. The slurry filling uses the movable space between the hole wall and the connecting rod outer wall to counter-press and squeeze the residual slurry in the hole from the hole bottom to the hole opening, so that the residual slurry flows out from the hole opening along the discharge groove, realizing the replacement of the drilling residues in the monitoring hole.

[0040] The high-pressure filling slurry of the present application can be tightly combined with the surrounding soil, realizing the dense backfilling of the filling material in the monitoring hole. The filling slurry has certain bonding strength and strength after solidification, solving the anchoring difficulty problem of the bottom anchoring end.

[0041] When the residual slurry in the hole cannot be completely removed, the mixing of the filling slurry and the residual slurry during the bottom slurry turning and rising process can also improve the overall strength of the backfilling material of the monitoring hole after stabilization. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a three-dimensional structural schematic diagram of the present application;

[0043] Figure 2 is a three-dimensional structural schematic diagram of the present applicationFigure 1 Enlarged view of section A in Fig. 1;

[0044] Figure 3 Fig. 2 is a cross-sectional view of the monitoring hole in the present invention;

[0045] Figure 4 Fig. 3 is a flow chart of the backfilling method in the present invention;

[0046] Wherein:

[0047] 1 Settlement monitoring foundation 2 Monitoring hole residual slurry discharge groove

[0048] 3 Sensor communication cable 4 Monitoring hole orifice

[0049] 5 Filling slurry discharge pipe 6 Filling slurry stirring container

[0050] 7 Coarse aggregate filter 8 Filling slurry suction pipe

[0051] 9 Slurry flow direction 10 Liquid pump assembly

[0052] 11 Liquid pump power source 12 Liquid pump discharge port connector

[0053] 13 High-pressure liquid pump 14 Liquid pump suction port connector

[0054] 15 Liquid pump controller 16 Top anchor end filler

[0055] 17 Top anchor end 18 Displacement sensor

[0056] 19 Connection pipe clamp 20 Connection rod

[0057] 21 Filling slurry 22 Monitoring hole upper filler

[0058] 23 Filling slurry cleaning interface 24 Top anchor end backfilling groove

[0059] 25 Monitoring hole 26 Bottom anchor end

[0060] 27 Slurry discharge hole. DETAILED DESCRIPTION

[0061] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and examples:

[0062] As Figures 1 to 4As shown, a single-point settlement monitoring hole backfilling device includes a settlement monitoring foundation 1, a top anchoring end 17 is provided in the settlement monitoring foundation 1, a monitoring hole 25 is formed at the lower end of the top anchoring end 17, a displacement sensor 18 is provided in the monitoring hole 25, the lower end of the displacement sensor 18 is connected to the joint of the connecting rod 20, and the lower end of the connecting rod 20 is provided with a slurry discharge hole 27 for mud discharge.

[0063] The connecting rod 20 is a multi-section connecting pipe, and the slurry discharge hole 27 is located on the outer wall of the lowest section of the connecting pipe.

[0064] The outer wall of the lowest connecting pipe is connected to the bottom anchoring end 26.

[0065] The connecting pipes are coaxially connected by a connecting clamp 19, the outer diameter of which is smaller than the inner diameter of the monitoring hole 25.

[0066] A slurry cleaning interface 23 is formed in the monitoring hole 25, and slurry 21 is filled below the slurry cleaning interface 23.

[0067] The top anchoring end 17 is disposed in the top anchoring end backfill groove 24, and the top anchoring end backfill groove 24 is filled with top anchoring end filler 16.

[0068] The top anchoring end backfill groove 24 is provided with a transverse monitoring hole residual mud discharge groove 2.

[0069] After the filling slurry 21 is injected into the monitoring hole 25 through the slurry discharge hole 27, the mud can be discharged from the residual mud discharge trough 2 of the monitoring hole.

[0070] The settlement monitoring foundation 1 is also equipped with a slurry mixing container 6, which contains the slurry 21, and a liquid pump assembly 10 for conveying the slurry 21 is provided at the slurry mixing container 6.

[0071] Specifically, a communication hole is also formed in the top anchoring end 17, through which the sensor communication cable 3 passes.

[0072] Specifically, the liquid pump assembly 10 includes a high-pressure liquid pump 13, the power input end of which is connected to the power output end of the liquid pump power source 11, that is, the liquid pump power source 11 drives the high-pressure liquid pump 13 to rotate.

[0073] The high-pressure liquid pump 13 is provided with a liquid pump outlet connector 12, which is connected to the output end of the high-pressure liquid pump 13. The high-pressure liquid pump 13 is provided with a liquid pump inlet connector 14, which is connected to the input end of the high-pressure liquid pump 13.

[0074] The high-pressure liquid pump 13 is also provided with a liquid pump controller 15 for controlling the high-pressure liquid pump 13.

[0075] Specifically, the liquid pump suction port joint 14 is in communication with the filling slurry suction pipe 8, and the filling slurry suction pipe 8 is connected with the filling slurry stirring container 6, so as to suck out the filling slurry 21 in the filling slurry stirring container 6 and guide the filling slurry 21 according to the slurry flow direction 9.

[0076] Specifically, one end of the filling slurry suction pipe 8 is also provided with a coarse aggregate filter 7, which can filter the filling slurry 21 entering the filling slurry suction pipe 8, so as to avoid the blockage of the slurry discharge hole 27.

[0077] Specifically, the liquid pump discharge port joint 12 is in communication with the filling slurry discharge pipe 5, and the filling slurry discharge pipe 5 sends the filling slurry 21 into the connecting rod 20, and the filling slurry discharge pipe 5 is in communication with the protruding section of the connecting rod 20.

[0078] Specifically, the monitoring hole residual slurry discharge groove 2 is in transverse communication with the monitoring hole orifice 4.

[0079] The filling slurry stirring container 6 is one of a filling slurry stirring pool and a filling slurry stirring barrel.

[0080] Specifically, the filling slurry cleaning interface 23 is filled with a monitoring hole upper filler 22.

[0081] A backfilling method of a single-point settlement monitoring hole backfilling device, comprising the following steps:

[0082] A. Drilling a monitoring hole in a settlement monitoring foundation;

[0083] B. Temporarily sealing the obtained monitoring hole;

[0084] C. Enlarging the orifice of the monitoring hole to form a top anchoring end backfilling groove;

[0085] D. Excavating a monitoring hole residual slurry discharge groove at the top anchoring end backfilling groove;

[0086] E. Removing the temporary sealing;

[0087] F. Opening a slurry discharge hole at the outer wall of the lowermost connecting pipe;

[0088] G. Connecting the lowermost connecting pipe with the bottom anchoring end to connect with other connecting pipes to form a connecting rod;

[0089] H. Installing the connecting rod into the monitoring hole and centering the connecting rod to ensure that the top of the connecting rod protrudes out of the monitoring hole;

[0090] I. Connect the upper end of the connecting rod to one end of the grout discharge pipe and the coarse aggregate filter to one end of the grout suction pipe;

[0091] J. Make or install the grout mixing container;

[0092] K. If necessary, carry out anti-seepage treatment at the bottom of the grout mixing container;

[0093] L. Prepare the grout;

[0094] M. Connect the outlet and inlet of the liquid pump assembly to the other end of the grout discharge pipe and the grout suction pipe respectively, and place the connected coarse aggregate filter at the bottom of the grout mixing container;

[0095] N. Operate the liquid pump controller to inject the grout into the monitoring hole through the connecting rod;

[0096] O. Clean the grout discharged from the monitoring hole residual grout discharge groove;

[0097] P. Observe whether the grout overflows from the monitoring hole residual grout discharge groove, if it does, continue to step Q, if it does not, return to step O;

[0098] Q. Remove the liquid pump assembly;

[0099] R. Clean the grout in the monitoring hole to the grout cleaning interface;

[0100] S. Remove the excess connecting rod;

[0101] T. After installing the displacement sensor in the monitoring hole, compact the medium-coarse sand or foundation soil in the top anchor backfill groove to the bottom surface of the top anchor backfill groove;

[0102] U. Backfill the top anchor backfill groove with plain concrete;

[0103] V. Carry out equipment debugging and site protection.

[0104] Specifically, drill a monitoring hole 25 vertically downward on the surface of the settlement monitoring foundation 1, and temporarily plug the hole to a certain depth to prevent foreign matter from falling into the hole when avoiding excavating the top anchor backfill groove 24 after drilling.

[0105] The temporary hole sealing uses a shapeable material, such as a woven bag, which is wound into a capsule or spherical shape for plugging.

[0106] After the monitoring hole orifice 4 is excavated to a certain outer diameter and depth to form a top anchoring end backfill groove 24, in one direction of the top anchoring end backfill groove 24, generally the roadbed transverse direction, a certain width and depth of the monitoring hole residual mud discharge groove 2 is excavated to a low-lying area, facilitating the discharge of residual mud to the outside of the monitoring hole 25 when filling the slurry 21 backfill.

[0107] The filling slurry stirring container 6 is excavated near the monitoring hole orifice 4, and in order to prevent slurry leakage and contamination, a seepage-proof film is laid at the bottom and periphery of the filling slurry stirring container 6. After the completion of civil construction such as drilling, orifice excavation, residual mud discharge groove excavation, and the like, the structure and component assembly of the monitoring hole backfill device are carried out.

[0108] Specifically, the single-point settlement monitoring equipment for roadbed settlement monitoring is composed of a top anchoring end 17, a displacement sensor 18, a connecting rod 20, a bottom anchoring end 26, a sensor communication cable 3, and the like. The connecting rod 20 is composed of segmented galvanized iron pipes and matching connecting pipe clamps 19, and the segmented galvanized iron pipes are generally six-section pipes.

[0109] According to the actual depth of the monitoring hole 25 and the length of the displacement sensor 18, the length and number of iron pipes that need to be connected are determined. Before assembling the monitoring equipment, 2-6 holes are opened in different directions on the lower side of the galvanized iron pipe connected to the bottom anchoring end 26 as slurry discharge holes 27.

[0110] The hole diameter of the slurry discharge hole 27 is 3-5 times larger than the maximum aggregate particle diameter in the filling slurry 21 material. The bottom anchoring end 26, the galvanized iron pipe with slurry discharge holes 27 on the side, and other galvanized iron pipes are sequentially assembled using matching connecting pipe clamps 19 and seepage-proof materials. After assembly is complete, a continuous connecting rod 20 is formed with the top portion higher than the orifice by a certain height, generally between 50-100 cm.

[0111] The top port of the assembled connecting rod 20 is tightly connected to the port of the filling slurry discharge pipe 5 through a high-pressure resistant pipe and a matching joint to avoid leakage.

[0112] The other port of the filling slurry discharge pipe 5 is tightly connected to the liquid pump discharge port joint 12 to avoid leakage. The one end of the filling slurry suction pipe 8 is connected to the liquid pump suction port joint 14, and the other end is installed with a coarse aggregate filter 7 and then placed at the bottom of the slurry stirring pool to avoid coarse aggregate blockage of the slurry conveying pipe.

[0113] As a case, during the assembly of the connecting rod 20, when the monitoring hole 25 is deep, the upper part of the connecting rod can be fixed in the hole through a pipe clamp, and a section is vertically assembled above the orifice and a section is lowered into the hole.

[0114] As another case, when the monitoring hole 25 is shallow, the galvanized iron pipe with the slurry discharge hole 27 can be assembled horizontally outside the hole, and then vertically lowered into the hole in one time.

[0115] The connecting rod 20 is sealed and connected at the joint during assembly to avoid leakage.

[0116] When the monitoring hole is deep and there is a lot of residual slurry in the hole, the liquid pump assembly 10 can be used for reverse extraction, that is, the connection relationship between the liquid pump outlet joint 12 and the liquid pump inlet joint 14 is changed. The residual slurry in the hole is pumped out to the filling slurry stirring container 6, and after cleaning the filling slurry stirring container 6, the conditions for mixing the filling slurry 21 are prepared.

[0117] When the effect of using the liquid pump assembly 10 to extract the residual slurry in the hole is good, the residual slurry discharge groove 2 in the monitoring hole does not need to be excavated, and when the effect is not good, it still needs to be excavated.

[0118] After the backfilling device is assembled, the filling slurry 21 in the filling slurry stirring container 6 near the monitoring hole is added with raw materials according to a certain water, ash, and aggregate ratio when the monitoring hole is backfilled, and auxiliary materials such as a quick-setting agent and a thickening agent are added if necessary. After stirring uniformly, it is ready for use. During use, the filling slurry 21 in the filling slurry stirring container 6 needs to be repeatedly stirred at intervals. If conditions permit, an automatic stirring device can be installed and used in the filling slurry stirring container 6 to avoid the influence of long-term storage and sedimentation on the filling effect.

[0119] The liquid pump assembly 10 controls the slurry delivery pressure and flow rate through the liquid pump controller 15. It is provided with pressure, flow rate, and other index display instruments and index adjustment buttons. The liquid pump power source 11 of the liquid pump assembly 10 can use an electric motor or a fuel engine.

[0120] Initially, the liquid outlet valve is adjusted to resist, and the pressure gauge is observed. When the pressure is small, the liquid outlet valve is adjusted to gradually increase the pressure. The filling slurry is sprayed from the filling slurry discharge hole 27 on the side of the connecting rod at the bottom of the hole and flows upward to form an upward filling slurry annular column. When a water drill is used to construct a monitoring hole, there is a lot of residual slurry and water in the hole. The residual slurry and water in the hole are squeezed upward, and finally discharged through the monitoring hole residual slurry discharge groove 2 at the hole.

[0121] In order to avoid pipe blockage and fully extrude the residual slurry in the monitoring hole, the backfilling process needs to be dynamically adjusted according to the index instrument data.

[0122] The residual mud is overflowed from the monitoring hole residual mud discharge groove 2 to the monitoring hole, and the residual mud in the monitoring hole is discharged. When the residual mud in the monitoring hole is completely discharged, the filling slurry 21 is overflowed from the hole, at which time the liquid pump injection can be stopped, the filling slurry discharge pipe 5 is disconnected from the top joint of the connecting rod 20, and the upper filling slurry 21 in the monitoring hole is removed by the reverse extraction of the liquid pump assembly 10 to the filling slurry cleaning interface 23.

[0123] The position of the filling slurry cleaning interface 23 is determined according to the length of the maximum range of the displacement sensor 18, the installation depth of the top anchoring end.

[0124] The excess connecting rod in the hole above the filling slurry cleaning interface 23 is disconnected, the bottom of the displacement sensor 18 is connected to the joint of the connecting rod 20 in the hole and centered, the filling slurry cleaning interface 23 in the monitoring hole 25 is backfilled to the top of the monitoring hole 22 to the bottom surface of the top anchoring end backfill groove 24, which is generally medium sand or foundation soil, and is tamped.

[0125] The top of the displacement sensor 18 is connected to the top anchoring end 17, and the top anchoring end filling material 16 is backfilled in the top anchoring end backfill groove 24, which is generally plain concrete, and the surface is flat.

[0126] After the single-point displacement meter is installed, the equipment is debugged, the site is cleaned and protected.

[0127] The present application transports the filling slurry outside the hole from the connecting rod internal passage from the top to the bottom by the high-pressure liquid pump, and discharges it from the slurry discharge hole. The filling slurry uses the movable space between the hole wall and the connecting rod outer wall to back pressure and squeeze the residual mud from the hole bottom to the hole mouth, so that the residual mud flows out from the hole mouth along the discharge groove, and the drilling residual material in the monitoring hole is replaced.

[0128] The filling slurry of the present application can be tightly combined with the surrounding soil by high-pressure extrusion into the hole, and the filling material in the monitoring hole is densely backfilled. The filling slurry has certain bonding strength and strength after solidification, and solves the problem of difficult anchoring of the bottom anchoring end.

[0129] When the residual mud in the hole cannot be completely removed, the mixing of the filling slurry and the residual mud during the bottom slurry rising process can also improve the overall strength of the backfill material of the monitoring hole after stabilization.

Claims

1. A backfilling method for a single-point settlement monitoring backfilling device, the backfilling device comprising a settlement monitoring foundation (1) provided with a top anchoring end (17), a monitoring hole (25) formed at the lower end of the top anchoring end (17), a displacement sensor (18) arranged in the monitoring hole (25), and a joint connecting the lower end of the displacement sensor (18) with a connecting rod (20), and a slurry discharge hole (27) arranged at the lower end of the connecting rod (20) for discharging mud; the connecting rod (20) is a multi-section connecting pipe, the connecting pipe is a galvanized iron pipe, and the slurry discharge hole (27) is arranged at the outer wall of the lowermost connecting pipe; the connecting pipes are coaxially connected through connecting pipe hoops (19), and the outer diameter of the connecting pipe hoops (19) is smaller than the inner diameter of the monitoring hole (25); a filling slurry cleaning interface (23) is formed in the monitoring hole (25), and the filling slurry (21) is filled below the filling slurry cleaning interface (23); the outer wall of the lowermost connecting pipe is connected with a bottom anchoring end (26); the top anchoring end (17) is arranged in a top anchoring end backfilling groove (24) filled with a top anchoring end filler (16); a transverse monitoring hole residual mud discharge groove (2) is arranged in the top anchoring end backfilling groove (24); after the filling slurry (21) is injected into the monitoring hole (25) through the slurry discharge hole (27), residual mud can be discharged from the monitoring hole residual mud discharge groove (2); the settlement monitoring foundation (1) is further provided with a filling slurry stirring container (6) for containing the filling slurry (21), and a liquid pump assembly (10) for delivering the filling slurry (21) is arranged at the filling slurry stirring container (6); characterized in that the backfilling method comprises the following steps: A. drilling a monitoring hole in the settlement monitoring foundation; B. temporarily sealing the obtained monitoring hole; C. expanding the hole of the monitoring hole to form a top anchoring end backfilling groove; D. excavating a monitoring hole residual mud discharge groove at the top anchoring end backfilling groove; E. removing the temporary seal; F. opening a slurry discharge hole at the outer wall of the lowermost connecting pipe; G. connecting the lowermost connecting pipe with the bottom anchoring end to form a connecting rod by connecting with other connecting pipes; H. installing the connecting rod into the monitoring hole and centering the connecting rod to ensure that the top of the connecting rod protrudes out of the monitoring hole; I. connecting one end of the filling slurry discharge pipe with the upper end of the connecting rod and connecting one end of the filling slurry suction pipe with a coarse-grained aggregate filter; J. manufacturing or installing the filling slurry stirring container; K. if necessary, performing anti-seepage protection treatment at the bottom of the filling slurry stirring container; L. preparing the filling slurry; M. connecting the discharge port and the suction port of the liquid pump assembly with the other end of the filling slurry discharge pipe and the other end of the filling slurry suction pipe, respectively, and placing the connected coarse-grained aggregate filter at the bottom of the filling slurry stirring container; N. operating the liquid pump controller to inject the filling slurry into the monitoring hole through the connecting rod; O. cleaning the mud discharged from the monitoring hole residual mud discharge groove. P. Observe if the filling slurry overflows from the residual slurry discharge groove of the monitoring hole, if it does, continue to step Q, if not, return to step O; Q. Remove the liquid pump assembly; R. Clean the filling slurry in the monitoring hole to the filling slurry cleaning interface; S. Remove the excess connecting rod; T. After installing the displacement sensor in the monitoring hole, compact the medium-coarse sand or foundation soil in the backfill groove to the bottom surface of the top anchoring end backfill groove; U. Backfill the top anchoring end backfill groove with plain concrete; V. Perform equipment debugging and site protection; According to the actual depth of the monitoring hole (25) and the length of the displacement sensor (18), determine the length and number of galvanized iron pipes that need to be connected, and open 2-6 holes on the lower side of the galvanized iron pipe connected to the bottom anchoring end (26) in different directions as slurry discharge holes (27) before assembling the monitoring equipment; The hole diameter of the slurry discharge hole (27) is 3-5 times larger than the maximum aggregate particle size in the filling slurry (21) material, and the matching connecting pipe clamp (19) and anti-leakage material are used to sequentially assemble the bottom anchoring end (26), the galvanized iron pipe with slurry discharge holes (27) on the side, and other galvanized iron pipes, forming a continuous connecting rod (20) after assembly, with a certain height above the orifice, generally between 50-100 cm; The top port of the assembled connecting rod (20) is tightly connected with the port of the filling slurry discharge pipe (5) through high-pressure resistant pipes and matching connectors to avoid leakage; Remove the excess connecting rod in the hole above the filling slurry cleaning interface (23), connect the bottom of the displacement sensor (18) with the joint of the connecting rod (20) in the hole and center it, backfill the monitoring hole upper filler (22) in the monitoring hole (25) above the filling slurry cleaning interface (23) to the bottom surface of the top anchoring end backfill groove (24) with medium-coarse sand or foundation soil, and compact it.

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