A grouting construction device and method for rammed and expanded cast-in-place piles

Abstract

The present invention relates to a post-grouting and grouting construction device and method for tamping and expanding bored piles, which belongs to the technical field of grouting construction tools; the construction device comprises a movable seat, a mud storage and stirring device, a hoisting mechanism, and a pumping grouting machine are arranged on the upper end of the movable seat, the mud storage and stirring device is connected to the pumping grouting machine, a liftable support frame is fixedly arranged on the front side of the upper end of the movable seat, a fixed pulley is arranged on the upper end of the support frame, the hoisting mechanism comprises a drum, a steel wire is wound around the outer side of the drum, a grouting mechanism is fixedly arranged on the end of the steel wire away from the drum after passing around the fixed pulley, the grouting mechanism comprises a counterweight rod, the counterweight rod is connected to the steel wire, the lower end of the counterweight rod is connected to the grouting anchor rod through a connecting head, a support sealing assembly is arranged on the outer side of the grouting anchor rod, and the support sealing assembly is clamped at the bored pile hole; the problems of inaccurate grouting depth control and unstable grouting fitting and sealing effect of the existing grouting and grouting construction device are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting construction tools, and in particular relates to a post-grouting grouting construction device and method for rammed and expanded cast-in-place piles. Background Art

[0002] Rammed and expanded cast-in-place piles are a type of pile foundation commonly used to reinforce foundations. The quality of their construction directly affects the stability and safety of buildings. Currently, grouting construction after rammed and expanded cast-in-place piles has been widely used in engineering practice. However, the existing grouting construction equipment still has many technical defects, which restricts the improvement of grouting quality and construction efficiency.

[0003] Most of the existing grouting and grouting construction devices adopt a split structure, and the mud stirring device and the grouting mechanism are independent of each other, which requires multiple equipment to work together during construction, increasing the transfer and debugging time between equipment; at the same time, due to the large overall weight and large volume of the equipment, it is very difficult to transfer and deploy it between multiple construction sites, which seriously affects the construction progress; especially in large-scale projects or continuous operations at multiple construction sites, the poor maneuverability of the equipment has become an important factor restricting construction efficiency. Traditional sealing methods mostly use rubber gaskets or mechanical clamping devices, which are prone to leakage during high-pressure grouting, resulting in slurry backflow and leakage, which not only wastes grouting materials, but also may cause the soil around the pile foundation to loosen; at the same time, the existing sealing device lacks real-time monitoring and adjustment functions, and cannot be adjusted accordingly according to the pressure changes during the grouting process. The sealing effect is difficult to guarantee, which ultimately affects the grouting quality; for this reason, the present application designs a post-grouting and grouting construction device and method for tamping and expanding cast-in-place piles to solve the above problems. Summary of the Invention

[0004] The present invention overcomes the deficiencies of the prior art and proposes a post-grouting grouting construction device and method for rammed and expanded cast-in-place piles; and solves the problems of inaccurate grouting depth control and unstable grouting fitting and sealing effect of the prior grouting construction device.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions.

[0006] A post-grouting and grouting construction device for tamping and expanding bored piles comprises a movable seat, a mud storage and mixing device, a hoisting mechanism, and a pumping grouting machine are arranged on the upper end of the movable seat, the mud storage and mixing device is connected to the pumping grouting machine, a liftable support frame is fixedly arranged on the front side of the upper end of the movable seat, a fixed pulley is arranged on the upper end of the support frame, the hoisting mechanism comprises a drum, a steel wire is wound around the outer side of the drum, a grouting mechanism is fixedly arranged on the end of the steel wire away from the drum after passing around the fixed pulley, the grouting mechanism comprises a counterweight rod, the counterweight rod is connected to the steel wire, the lower end of the counterweight rod is connected to the grouting anchor rod through a connecting head, a support sealing assembly is arranged on the outer side of the grouting anchor rod, and the support sealing assembly is clamped at the hole mouth of the bored pile.

[0007] Furthermore, the support frame includes two vertical multi-telescopic support rods, four matching adjustment rods and a horizontal support block. The lower ends of the two multi-telescopic support rods are fixedly connected to the two sides of the front end of the upper end face of the moving seat, and the upper ends of the two multi-telescopic support rods are fixedly connected to the left and right ends of the lower end face of the support block. The upper end of each multi-telescopic support rod is rotatably provided with two retractable matching adjustment rods, the lower end of one matching adjustment rod is hinged to the upper end of the moving seat, and the lower end of the other matching adjustment rod is connected to the ground.

[0008] Furthermore, the multiple telescopic support rods are formed by multiple nested support rods that are socketed with each other, and each nested support rod is provided with multiple limiting holes. The same limiting pin is inserted into the limiting holes on two adjacent nested support rods, thereby fixing the two adjacent nested support rods; the upper end of the uppermost nested support rod is fixedly connected to the lower end surface of the support block through a connecting seat.

[0009] Furthermore, the cooperating adjusting rod includes a telescopic rod, a threaded sleeve, and a threaded rod; the telescopic rod includes an inner rod and an outer tube, the inner rod is slidably inserted into the upper end opening of the outer tube, and a threaded sleeve is rotatably provided at the lower end of the outer tube of the telescopic rod, and a threaded rod is screwed inside the lower end opening of the threaded sleeve; the two cooperating adjusting rods are respectively located on the rear side of the multi-telescopic support rod and on the side away from the other multi-telescopic support rod; the upper ends of the inner rods of the telescopic rods of the two cooperating adjusting rods are hinged to the connecting seat at the upper end of the multi-telescopic support rod, and the lower end of the threaded rod of the cooperating adjusting rod located at the rear side is rotatably connected to the hinged seat fixed at the upper end of the moving seat; the lower end of the threaded rod of the cooperating adjusting rod located on the side away from the other multi-telescopic support rod is rotatably provided with a grounding seat, and the grounding seat is fixed to the ground by a ground nail.

[0010] Furthermore, a sliding groove extending forward and backward is provided in the middle of the lower end face of the support block, and a clamping groove is provided at the upper ends of the left and right inner walls of the sliding groove respectively, and a row of limiting grooves is provided at the inner bottom surface of each clamping groove, and the same sliding plate is slidably arranged inside the two clamping grooves, and a fixed pulley seat is fixedly provided in the middle of the lower end face of the sliding plate, and the fixed pulley is rotatably arranged inside the fixed pulley seat; a limiting strip is fixedly provided on the left and right sides of the lower end face of the sliding plate respectively, and the two limiting strips are respectively clamped in one of the limiting grooves inside the two clamping grooves; a plurality of vertical abutting springs are fixedly provided on the upper end of the sliding plate, and the upper ends of the abutting springs are connected to the upper end face of the clamping groove.

[0011] Furthermore, the counterweight rod is kept vertical, and the upper end of the counterweight rod is fixedly connected to the end of the steel wire away from the drum; the grouting anchor rod is kept vertical, and the upper end of the grouting anchor rod is fixedly connected to the lower end of the counterweight rod through a connecting head, and the connecting head is communicated with the interior of the grouting anchor rod; a grouting port is provided on the side wall of the connecting head, and the grouting port is connected to the pumping grouting machine through a grouting pipe; a plurality of grouting holes are equidistantly provided on the side wall of the lower half of the grouting anchor rod.

[0012] Furthermore, the supporting sealing assembly includes an abutting support plate, an air pump connecting pipe, a fixed threaded sleeve, a matching threaded sleeve, and an inflatable airbag; the abutting support plate is a horizontally arranged circular plate structure, a mounting hole is provided at the center of the abutting support plate, a fixed threaded sleeve is fixedly provided on the upper side of the mounting hole, a matching threaded sleeve is screwed on the outer side of the fixed threaded sleeve, a circular through hole is provided at the center of the top plate of the matching threaded sleeve, and a circle of abutting pad is provided inside the through hole; an air pressure detection column is provided on the top plate of the matching threaded sleeve; two threaded columns are provided on the lower end face of the abutting support plate, the outer sides of the two threaded columns are slidably sleeved with the same horizontal annular limiting plate, a locking nut is screwed on the lower ends of the two threaded columns, an inflatable airbag is provided between the limiting plate and the abutting support plate, and the inflatable airbag is sleeved on the outer sides of the two threaded columns.

[0013] Furthermore, the grouting anchor rod passes downward through the matching threaded sleeve, the fixed threaded sleeve, the abutment support plate, the inflatable airbag, and the limit plate in sequence and then extends into the interior of the bored pile hole; wherein the abutment pad inside the through hole of the matching threaded sleeve maintains close contact with the outer side surface of the grouting anchor rod; a first regulating valve is fixedly provided on the upper end of the abutment support plate, and the first regulating valve is a two-position three-way valve, the inlet of the first regulating valve is connected to the outlet of the air pump through an air pump connecting pipe, and an air inlet pipe is fixedly provided at the first outlet of the first regulating valve, and the air inlet pipe directly passes through the abutment support plate and extends into the interior of the bored pile hole, and the second outlet of the first regulating valve is directly connected to the inflatable airbag through an air supply pipe, and a second regulating valve is provided on the air supply pipe.

[0014] The cam is provided with a circle of vertical water supply branches at the lower end of the outer side surface of the fixed threaded sleeve, and the upper end of the water supply branches extends into the interior of the fixed threaded sleeve, and a nozzle is fixedly provided at the upper end of the water supply branches; the lower ends of all water supply branches are connected to the water supply main pipe through an annular connecting pipe, and two symmetrical semicircular slide grooves are provided at the lower end of the inner wall of the fixed threaded sleeve, and a semicircular push card is slidably provided inside each slide groove; two symmetrical adjusting bolts are screwed on the lower end of the outer wall of the fixed threaded sleeve, and the inner end of the adjusting bolt is rotatably connected to the outer side surface of the push card on the same side; a semicircular extrusion air cushion is fixedly provided on the inner side surface of each push card; a circular arc-shaped reflux groove is provided on the upper end surface of each push card, and the inner bottom surface of the reflux groove is kept inclined; a reflux pipe is provided at the lower end of the outer side surface of the fixed threaded sleeve, and the inner end of the reflux pipe is connected to the lowest point of the inner part of the two reflux grooves.

[0015] A construction method of a post-grouting grouting construction device for rammed and expanded cast-in-place piles comprises the following steps:

[0016] Step 1: First, connect all electrical components to the power supply, then move the entire construction device to the vicinity of the rammed and expanded cast-in-place pile construction site; add raw materials into the mud storage and mixing equipment, and stir and mix them evenly to form a slurry; then adjust the height of the support frame, and connect the four matching adjustment rods to the two multi-telescopic support rods; after the support frame is installed, adjust the front and rear position of the fixed pulley seat; pass the end of the steel wire away from the drum around the fixed pulley and connect it to the upper end of the counterweight rod, at this time the counterweight rod is in the highest position; connect the connector to the pump grouting machine through the grouting pipe;

[0017] When the airbag is inflated, the air is pumped in and the air is pumped in. When the airbag is inflated, the air is pumped in and the air is pumped in. When the airbag is inflated, the air is pumped in and the air is pumped in. When the airbag is inflated, the air is pumped in and the air is pumped in. When the airbag is inflated, the air is pumped in and the air is pumped in. Release, drive the counterweight rod and grouting anchor rod to descend as a whole, so that the lower end of the grouting anchor rod passes through the matching threaded sleeve, the fixed threaded sleeve, the abutment support plate, the inflatable airbag, and the limit plate in sequence and then extends into the inside of the bored pile hole. The grouting anchor rod stops descending after reaching the specified depth; the abutment pad inside the through hole of the threaded sleeve is adjusted to be in close contact with the outer wall of the grouting anchor rod to ensure the sealing of the through hole; then the inlet of the first regulating valve is connected to the outlet of the air inlet pipe, and the air pump continuously injects compressed air into the bored pile hole through the air inlet pipe, pressurizing the inside of the bored pile hole so that the inside of the bored pile hole is kept in a high-pressure state, and the air pressure detection column is used to monitor whether the sealing of the inflatable airbag and the abutment pad meets the requirements;

[0018] Step 3: Inject the slurry into the grouting anchor rod. The slurry is ejected from the grouting hole of the grouting anchor rod into the bored pile hole. During the grouting process, the operator needs to observe the reading of the air pressure detection column to ensure that the sealing state of the support seal assembly is good.

[0019] Step 4: After sufficient slurry is injected according to the design requirements, stop grouting; wait for the injected slurry to initially solidify, then slowly start the winch mechanism to reel in the steel wire and lift the grouting anchor rod out of the support and sealing assembly;

[0020] Step five, before the grouting anchor rod is raised, tighten the two adjusting bolts so that the two pushing plates are close to each other, and the squeezed air cushions on the two pushing plates clamp the grouting anchor rod, thereby closing the mounting hole on the abutment support plate; then inject water into the water main pipe, and the water main pipe outputs the water flow through the connecting pipe to the inside of each water supply branch, and sprays the water from the nozzle at the upper end of the water supply branch to the inside of the fixed threaded sleeve to flush the outside of the grouting anchor rod; the grouting anchor rod is flushed while being raised upward, and the sewage after flushing enters the inside of the reflow trough, and the sewage inside the reflow trough is discharged to the outside through the reflow pipe.

[0021] The beneficial effects of the present invention compared to the prior art are:

[0022] Through the coordination of the mobile seat and the mobile wheel, and the integrated design of the mud storage and mixing equipment and the pumping grouting machine, the mobility and stability of the device are guaranteed, and efficient mud preparation and transportation can be achieved, which facilitates the rapid transfer and deployment of the device between different construction sites, improves the maneuverability and operating efficiency of the construction device, and thus can achieve the function of adapting to continuous operation at multiple construction sites; through the coordination of the multiple telescopic support rods, the matching adjustment rods, the limit pins and the grounding seat in the support frame, the height of the device can be accurately adjusted, which is convenient for flexible adjustment according to different ground conditions and pile heights, and improves the ability of the device to adapt to uneven ground, and thus can achieve the function of adapting to complex terrain construction conditions; through the limit pins at the fixed pulley seat The cooperation of the strip, the limit groove and the abutment spring can effectively control the tension and movement trajectory of the winding wire, ensure the stability of the grouting mechanism during the lifting process, improve the accuracy of the grouting depth control, and thus realize the function of precise positioning grouting; and then through the cooperation of the inflatable airbag, the first control valve, the second control valve and the air pressure detection column in the supporting sealing assembly, it can not only effectively form a reliable sealing environment to prevent the slurry from flowing back, but also conveniently perform air pressure adjustment and status monitoring, thereby improving the sealing effect and safety during the grouting process, and thus realizing the function of high-quality sealing grouting, and finally solving the problems of inaccurate grouting depth control and unstable grouting fitting sealing effect of the existing grouting construction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention Figure 2 ;

[0026] Figure 3 It is a structural schematic diagram of the present invention after removing the grouting mechanism;

[0027] Figure 4 It is a schematic diagram of the internal structure of the support block;

[0028] Figure 5 It is a schematic diagram of the structure of the adjustment rod;

[0029] Figure 6 It is a structural diagram of the grouting mechanism;

[0030] Figure 7 It is a schematic diagram of the connection between the grouting anchor rod and the support sealing assembly;

[0031] Figure 8 It is a schematic diagram of the structure of the support seal assembly;

[0032] Figure 9 It is a schematic diagram of the connection between the abutment support plate, the limit plate and the inflatable airbag;

[0033] Figure 10 It is a schematic diagram of the connection between the fixed threaded sleeve and the cleaning component;

[0034] Among them, 1 is a mobile seat, 2 is a mud storage and mixing device, 3 is a multiple telescopic support rod, 4 is a grouting mechanism, 5 is a winch mechanism, 6 is a matching adjustment rod, 7 is a grounding seat, 8 is a limit pin, 9 is a pumping grouting machine, 10 is a fixed pulley seat, 11 is a support block, 12 is a limit groove, 13 is a limit bar, 14 is a contact spring, 15 is a telescopic rod, 16 is a threaded sleeve, 17 is a threaded rod, 18 is a counterweight rod, 19 is a connector, 20 is a support sealing assembly, 21 is a grouting anchor rod, 2 2 is a fixed threaded sleeve, 23 is a matching threaded sleeve, 24 is an abutment pad, 25 is an air pressure detection column, 26 is a first connecting clamp, 27 is an inflatable airbag, 28 is a first regulating valve, 29 is a second regulating valve, 30 is a limit plate, 31 is a threaded column, 32 is a locking nut, 33 is a second connecting clamp, 34 is a water supply branch pipe, 35 is a water supply main pipe, 36 is a return pipe, 37 is an adjusting bolt, 38 is a pushing clamp, 39 is an extrusion air cushion, 40 is a return groove, and 41 is an abutment support plate. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. The technical solutions of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0036] like Figure 1 As shown in -10, the present invention provides a post-grouting construction device for rammed and expanded bored piles, comprising a movable seat 1, wherein a mud storage and stirring device 2, a hoisting mechanism 5, and a pumping grouting machine 9 are arranged on the upper end of the movable seat 1, and the mud storage and stirring device 2 is connected to the pumping grouting machine 9. A liftable support frame is fixedly arranged on the front side of the upper end of the movable seat 1, and a fixed pulley is arranged on the upper end of the support frame. The hoisting mechanism 5 comprises a drum, and a steel wire is wound around the outer side of the drum. A grouting mechanism 4 is fixedly arranged on the end of the steel wire away from the drum after passing around the fixed pulley. The grouting mechanism 4 comprises a counterweight rod 18, which is connected to the steel wire. The lower end of the counterweight rod 18 is connected to the grouting anchor rod 21 through a connecting head 19, and a support sealing assembly 20 is arranged on the outer side of the grouting anchor rod 21. The support sealing assembly 20 is clamped at the hole mouth of the bored pile.

[0037] The four corners of the lower end surface of the movable base 1 are respectively provided with a movable wheel for rotation, and the entire device is driven to move by the four movable wheels.

[0038] The hoist mechanism 5 also includes a hoist motor, the output shaft of which is fixedly connected to the reel's rotating shaft. The reel's rotating shaft is horizontally arranged in a left-right direction and is rotatably mounted on the upper end of the movable base 1. The hoist motor drives the reel to rotate, thereby releasing or rewinding the steel wire, thereby adjusting the height of the grouting anchor 21 and the support seal assembly 20.

[0039] The support frame includes two vertical multi-telescopic support rods 3, four matching adjustment rods 6 and a horizontal support block 11. The lower ends of the two multi-telescopic support rods 3 are fixedly connected to the two sides of the front end of the upper end face of the moving seat 1, and the upper ends of the two multi-telescopic support rods 3 are fixedly connected to the left and right ends of the lower end face of the support block 11. The upper end of each multi-telescopic support rod 3 is rotatably provided with two retractable matching adjustment rods 6, the lower end of one of the matching adjustment rods 6 is hinged to the upper end of the moving seat 1, and the lower end of the other matching adjustment rod 6 is connected to the ground.

[0040] The multi-telescopic support rod 3 is composed of multiple nested support rods that are nested together. Each nested support rod is provided with multiple stop holes along its axis. The stop holes on two adjacent nested support rods are inserted into the same stop pin 8, thereby securing the two adjacent nested support rods. By aligning the different stop holes on the two adjacent nested support rods, the length of the multi-telescopic support rod 3 can be adjusted, and thus the height of the support block 11. The upper end of the uppermost nested support rod is fixedly connected to the lower end surface of the support block 11 via a connecting seat.

[0041] The mating adjustment rod 6 comprises a telescopic rod 15, a threaded sleeve 16, and a threaded rod 17. The telescopic rod 15 comprises an inner rod and an outer barrel. The inner rod slides into the upper opening of the outer barrel. A resilient latch is provided on the outer surface of the inner rod. A row of latch holes are provided along the outer wall of the outer barrel along its axis. The latch on the inner rod is inserted into one of the latch holes in the outer barrel. When the outer barrel is fixed and the inner rod is pulled firmly, the latch pushes back and moves to the other latch hole, thereby adjusting the length of the telescopic rod 15 and, in turn, achieving coarse adjustment of the length of the mating adjustment rod 6. A threaded sleeve 16 is rotatably mounted at the lower end of the outer barrel of the telescopic rod 15. The axis of the threaded sleeve 16 coincides with the axis of the telescopic rod 15. A threaded rod 17 is screwed into the lower opening of the threaded sleeve 16. When the threaded sleeve 16 is rotated relative to the outer tube of the telescopic rod 15, the threaded sleeve 16 and the threaded rod 17 are screwed together, thereby controlling the threaded rod 17 to slide inside the threaded sleeve 16, thereby achieving fine adjustment of the length of the matching adjustment rod 6.

[0042] The two cooperating adjustment rods 6 are respectively located on the rear side of the multi-telescopic support rod 3 and on the side away from the other multi-telescopic support rod 3. The inner upper end of the telescopic rod 15 of the cooperating adjustment rod 6 located on the rear side is hinged to the connecting seat at the upper end of the multi-telescopic support rod 3, and the lower end of the threaded rod 17 of the cooperating adjustment rod 6 located on the rear side is rotatably connected to the hinge seat fixed at the upper end of the movable seat 1. The inner upper end of the telescopic rod 15 of the cooperating adjustment rod 6 located on the side away from the other multi-telescopic support rod 3 is hinged to the connecting seat at the upper end of the multi-telescopic support rod 3, and the lower end of the threaded rod 17 of the cooperating adjustment rod 6 located on the side away from the other multi-telescopic support rod 3 is rotatably connected to a grounding seat 7, which is fixed to the ground via ground spikes. The upper and lower hinge axes of the cooperating adjustment rod 6 located on the rear side are both horizontally arranged in the left-right direction, while the upper and lower hinge axes of the cooperating adjustment rod 6 located on the side away from the other multi-telescopic support rod 3 are both horizontally arranged in the front-back direction.

[0043] A sliding groove extending forward and backward is provided in the middle of the lower end surface of the support block 11. A snap-in groove extending forward and backward is provided at the upper ends of the left and right inner walls of the sliding groove. A row of limit grooves 12 are provided on the inner bottom surface of each snap-in groove along the front-to-back direction, with the limit grooves 12 on the inner bottom surfaces of the two snap-in grooves corresponding to each other. A horizontal sliding plate is slidably disposed within the two snap-in grooves, sliding horizontally along the front-to-back direction. A fixed pulley seat 10 is fixedly disposed in the middle of the lower end surface of the sliding plate, sliding within the sliding groove along the front-to-back direction. The fixed pulley is rotatably disposed within the fixed pulley seat 10. Left and right horizontal limit bars 13 are fixedly disposed on the left and right sides of the lower end surface of the sliding plate, respectively. The two limit bars 13 snap into place within one of the limit grooves 12 within the two snap-in grooves. A plurality of vertical abutment springs 14 are fixedly disposed on the upper end of the sliding plate, with the upper ends of the abutment springs 14 connected to the upper end surfaces of the snap-in grooves. The front and rear positions of the fixed pulley can be adjusted by snapping the limiting strips 13 on the sliding plate into different limiting grooves 12. The contact springs 14 ensure that the positions of the sliding plate and the fixed pulley seat 10 are stable.

[0044] The counterweight rod 18 is maintained vertically, with its upper end fixedly connected to the end of the steel wire away from the reel. The grouting anchor rod 21 is maintained vertically, with its upper end fixedly connected to the lower end of the counterweight rod 18 via a connector 19, which is in communication with the interior of the grouting anchor rod 21. Grouting ports are provided on the sidewalls of the connector 19, which are connected to the pumping grouting machine 9 via a grouting pipe. Multiple grouting holes are evenly spaced on the sidewalls of the lower half of the grouting anchor rod 21. These equally spaced holes ensure uniform grouting, improving grouting quality and efficiency and ensuring the strength and stability of the rammed-expanded cast-in-place pile.

[0045] The support sealing assembly 20 includes an abutting support plate 41 , an air pump connecting pipe, a fixed threaded sleeve 22 , a matching threaded sleeve 23 , and an inflatable airbag 27 .

[0046] The abutment support plate 41 is a horizontally arranged circular plate-like structure. A circular mounting hole is provided at the center of the abutment support plate 41. The inner diameter of the mounting hole is larger than the outer diameter of the grouting anchor 21. A fixed threaded sleeve 22 is fixedly provided on the upper side of the mounting hole. The fixed threaded sleeve 22 is a cylindrical structure with openings at both ends. The outer side of the fixed threaded sleeve 22 is provided with an external thread. A mating threaded sleeve 23 is screwed onto the outer side of the fixed threaded sleeve 22. The mating threaded sleeve 23 is a cylindrical structure with an opening at the lower end. The inner side of the mating threaded sleeve 23 is provided with an internal thread. The lower end opening of the mating threaded sleeve 23 is screwed onto the outer side of the fixed threaded sleeve 22. A circular through hole is provided at the center of the top plate of the mating threaded sleeve 23. A circle of annular abutment pads 24 are provided inside the through hole. An air pressure detection column 25 is provided on the top plate of the mating threaded sleeve 23.

[0047] Two symmetrical vertical threaded studs 31 are installed on the lower end of the abutment support plate 41. A horizontal, annular limiting plate 30 is slidably mounted on the outer sides of the two threaded studs 31. A locking nut 32 is screwed onto the lower end of each threaded stud 31, and both locking nuts 32 contact the lower end of the limiting plate 30. An annular inflatable bladder 27 is installed between the limiting plate 30 and the abutment support plate 41. The bladder 27 is mounted on the outer sides of the two threaded studs 31. When the two locking nuts 32 are tightened, the limiting plate 30 and the abutment support plate 41 squeeze the bladder 27, causing it to press tightly against the inner wall of the bored pile hole, thereby sealing the bored pile hole. The inflatable airbag 27 is supported and protected by the limiting plate 30 and the abutting support plate 41, which can prevent the inflatable airbag 27 from over-expansion or damage, extend the service life of the support sealing assembly 20, improve the reliability and durability of the overall device, and enable the inflatable airbag 27 to better expand and fit to the side.

[0048] The grouting anchor 21 passes downward through the mating threaded sleeve 23, the fixed threaded sleeve 22, the abutment support plate 41, the inflatable airbag 27, and the stop plate 30, extending into the interior of the bored pile hole. The abutment pad 24 inside the mating threaded sleeve 23 maintains close contact with the outer surface of the grouting anchor 21, ensuring a tight seal at the through hole. Two symmetrical stopper bumps are fixedly mounted within the mounting hole of the abutment support plate 41, abutting the outer surface of the grouting anchor 21.

[0049] A plurality of first connecting snap rings 26 are fixedly provided on the upper end surface of the abutting support plate 41 , and a plurality of second connecting snap rings 33 are fixedly provided on the lower end surface of the limiting plate 30 .

[0050] A first control valve 28 is fixedly mounted on the upper end of the abutment support plate 41. This first control valve 28 is a two-position, three-way valve. Its inlet is connected to the air pump outlet via an air pump connection tube. An air inlet pipe is fixedly mounted at the first outlet of the first control valve 28. This pipe passes directly through the abutment support plate 41 and extends into the interior of the bored pile opening. The second outlet of the first control valve 28 is directly connected to the inflatable airbag 27 via an air supply pipe, which is equipped with a second control valve 29. The first control valve 28 can switch between its two outlets, selectively directing the compressed gas entering the first control valve 28 to one of the two outlets.

[0051] A cleaning assembly is provided inside the fixed threaded sleeve 22 , and the cleaning assembly includes a water supply main pipe 35 , a water supply branch pipe 34 , a push clamping plate 38 , an adjusting bolt 37 , an extrusion air cushion 39 , and a return pipe 36 .

[0052] A water main pipe 35 is provided at the lower end of the outer side surface of the fixed threaded sleeve 22, and a circle of vertical water supply branches 34 are provided inside the side wall of the fixed threaded sleeve 22. The upper ends of the water supply branches 34 extend into the interior of the fixed threaded sleeve 22, and a nozzle is fixedly provided at the upper end of the water supply branch 34; the lower ends of all the water supply branches 34 are connected to the water main pipe 35 through a circular connecting pipe, and the water main pipe 35 outputs water to the interior of each water supply branch 34 through the connecting pipe, and the water is sprayed into the interior of the fixed threaded sleeve 22 from the nozzle at the upper end of the water supply branch 34.

[0053] Two symmetrical semicircular slots are located at the lower end of the inner wall of the fixed threaded sleeve 22, each housing a semicircular push plate 38. Two symmetrical adjustment bolts 37 are threadedly connected to the lower end of the outer wall of the fixed threaded sleeve 22. The axes of the adjustment bolts 37 are arranged radially along the fixed threaded sleeve 22, and the inner ends of the adjustment bolts 37 are rotatably connected to the outer surfaces of the push plates 38 on the same side. When the two adjustment bolts 37 are rotated, the threaded connection between the adjustment bolts 37 and the fixed threaded sleeve 22 causes the adjustment bolts 37 to slide radially along the fixed threaded sleeve 22, thereby moving the two push plates 38 closer to or farther from each other. A semicircular extrusion air cushion 39 is fixedly located on the inner surface of each push plate 38. A circular arc-shaped reflow groove 40 is located on the upper end surface of each push plate 38, with the inner bottom surface of each reflow groove 40 being tilted. A return pipe 36 is provided at the lower end of the outer side surface of the fixed threaded sleeve 22 , and one inner end of the return pipe 36 is connected to the lowest inner portion of the two return grooves 40 .

[0054] The present invention also proposes a construction method of a post-grouting grouting construction device for rammed and expanded cast-in-place piles, comprising the following steps:

[0055] Step 1: First, connect all electrical components to the power supply, and then move the entire construction device to the vicinity of the rammed and expanded cast-in-place pile construction site; after the equipment is in place, lock the moving wheels on the moving base 1 to ensure the overall stability of the device; before the preparation work begins, first add cement, water, additives and other raw materials into the mud storage and mixing equipment 2 according to a specific ratio, and stir and mix these raw materials evenly to form a slurry with appropriate viscosity and fluidity; then adjust the length of the two multi-telescopic support rods 3 inside the support frame so that the height of the support block 11 meets the working requirements; adjust the four cooperating adjustment rods 3 to adjust the length of the support block 11 to meet the working requirements; The length of the rod 6 makes the lower ends of the two cooperating adjusting rods 6 hinged to the hinged seat at the upper end of the moving seat 1, and the grounding seats 7 at the lower ends of the other two cooperating adjusting rods 6 are fixedly connected to the ground through ground nails. The four cooperating adjusting rods 6 support the entire device to enhance stability and avoid sliding or displacement during construction; after the support frame is installed, the front and rear positions of the fixed pulley seat 10 are adjusted; the end of the steel wire away from the drum is passed around the fixed pulley and connected to the upper end of the counterweight rod 18. At this time, the counterweight rod 18 is in the highest position; the connecting head 19 is connected to the pumping grouting machine 9 through the grouting pipe.

[0056] The second step is to place the abutment support plate 41 on the top of the pile, then sleeve the limiting plate 30 on the outside of the threaded column 31, and tighten the locking nut 32 at the lower end of the threaded column 31, so that the limiting plate 30 and the abutment support plate 41 jointly provide pre-pressure to the inflatable airbag 27, and then place the abutment support plate 41 at the bored pile hole; install the external support rod on the first connecting clip 26 at the upper end of the abutment support plate 41 and the second connecting clip 33 at the lower end of the limiting plate 30 to enhance the stability of the support sealing assembly 20; then screw the adjusting threaded sleeve 16 on the outside of the fixed threaded sleeve 22; connect the first regulating valve 28 to the air pump through the air pump connecting pipe, connect the inlet of the first regulating valve 28 to the outlet at the air supply pipe, open the second regulating valve 29, and the air pump injects compressed air into the inflatable airbag 27, so that the inflatable airbag 27 expands and fits the inner wall of the bored pile hole to ensure the sealing at the bored pile hole; the inflatable airbag 27 After the inflation is completed, the second regulating valve 29 is closed; the control wire is released, driving the counterweight rod 18 and the grouting anchor rod 21 to descend as a whole, so that the lower end of the grouting anchor rod 21 passes through the matching threaded sleeve 23, the fixed threaded sleeve 22, the abutment support plate 41, the inflatable airbag 27, and the limit plate 30 in sequence and extends into the inside of the bored pile hole. After the grouting anchor rod 21 reaches the specified depth, it stops descending to ensure that the grouting hole on the grouting anchor rod 21 is located in the appropriate position of the bored pile hole; the abutment pad 24 inside the through hole of the adjusting threaded sleeve 16 is in close contact with the outer wall of the grouting anchor rod 21 to ensure the sealing at the through hole; then the inlet of the first regulating valve 28 is connected to the outlet at the air inlet pipe, and the air pump continuously injects compressed air into the bored pile hole through the air inlet pipe, pressurizing the inside of the bored pile hole so that the inside of the bored pile hole remains in a high-pressure state, and the air pressure detection column 25 is used to monitor whether the sealing of the inflatable airbag 27 and the abutment pad 24 meets the requirements.

[0057] In step three, the pumping grouting machine 9 injects the evenly mixed slurry into the grouting anchor rod 21 through the grouting pipe, and the slurry is ejected from the grouting hole of the grouting anchor rod 21 into the bored pile hole. The grouting pressure is precisely controlled by the pumping grouting machine 9 and can be adjusted in real time according to engineering requirements. During the grouting process, the operator needs to closely observe the reading of the air pressure detection column 25 to ensure that the sealing state of the support sealing assembly 20 is in good condition. During the grouting, the counterweight rod 18 continuously stabilizes the position of the grouting anchor rod 21 by its own weight, and cooperates with the winch mechanism 5 for fine-tuning to ensure that the slurry is evenly injected. If a blockage is encountered, the grouting anchor rod 21 can be slightly lifted by the winch mechanism 5, and then lowered again for dredging. The grouting speed and pressure need to be adjusted according to the specific situation of the rammed and expanded bored pile. Generally, a grouting method from slow to fast and from low pressure to high pressure is adopted to ensure that the slurry can fully penetrate into the soil around the pile body.

[0058] Step 4. Finally, after injecting enough slurry according to the design requirements, turn off the pumping grouting machine 9 and stop grouting; wait for three to five minutes for the injected slurry to initially solidify, then slowly start the winch mechanism 5 to reel in the steel wire and lift the grouting anchor rod 21 out of the supporting sealing assembly 20; the lifting process needs to be slow and uniform to avoid disturbing the initial setting slurry.

[0059] Step 5: Before the grouting anchor rod 21 is raised, the two adjusting bolts 37 are tightened so that the two push clamps 38 are close to each other. The squeeze air cushions 39 on the two push clamps 38 clamp the grouting anchor rod 21, thereby closing the mounting hole on the abutment support plate 41. Then, water is injected into the water main pipe 35. The water main pipe 35 outputs the water flow through the connecting pipe to the inside of each water supply branch 34, and the water is sprayed from the nozzle at the upper end of the water supply branch 34 to the inside of the fixed threaded sleeve 22 to flush the outside of the grouting anchor rod 21. In this way, the grouting anchor rod 21 is raised and flushed at the same time. The flushed sewage enters the inside of the return trough 40, and the sewage inside the return trough 40 is discharged to the outside through the return pipe 36.

[0060] Step 6. After the grouting anchor rod 21 is completely raised, remove the air pump connecting pipe between the air pump and the first regulating valve 28, connect the inlet of the first regulating valve 28 to the outlet of the air supply pipe, and open the second regulating valve 29 to release the gas inside the inflatable airbag 27; then unscrew the locking nut 32 and remove the limit plate 30; then remove the extra support rods on the first connecting clamp 26 and the second connecting clamp 33; then carefully remove the entire support sealing assembly 20 and check the integrity of the support sealing assembly 20 for next use; in the equipment recovery stage, first remove the support block 11 from the two Remove the multi-telescopic support rod 3, then remove the four matching adjustment rods 6, and then remove the two multi-telescopic support rods 3, and adjust the length of the multi-telescopic support rod 3 to the shortest; finally, clean the residual slurry in the pumping grouting machine 9 and related pipelines to prevent the pipeline from being blocked after hardening; firmly fix the support frame on the mobile seat 1, unlock the moving wheels, and push the entire device away from the construction site and move it to the next work point or storage area; after the device is used, the key components, especially the inflatable airbag 27 of the support sealing assembly 20, should be inspected and maintained to ensure reliability and safety for the next use.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A post-grouting and grouting construction device for rammed and expanded cast-in-place piles, characterized in that: The invention comprises a movable seat (1), wherein a slurry storage and stirring device (2), a hoisting mechanism (5), and a pumping grouting machine (9) are provided at the upper end of the movable seat (1), wherein the slurry storage and stirring device (2) is connected to the pumping grouting machine (9), a lifting support frame is fixedly provided at the front side of the upper end of the movable seat (1), a fixed pulley is provided at the upper end of the support frame, the hoisting mechanism (5) comprises a drum, a steel wire is wound around the outer side of the drum, a grouting mechanism (4) is fixedly provided at the end of the steel wire away from the drum after passing around the fixed pulley, the grouting mechanism (4) comprises a counterweight rod (18), the counterweight rod (18) is connected to the steel wire, the lower end of the counterweight rod (18) is connected to the grouting anchor rod (21) through a connector (19), a support sealing assembly (20) is provided at the outer side of the grouting anchor rod (21), and the support sealing assembly (20) is clamped at the hole of the cast-in-place pile; The support sealing assembly (20) includes a fixed threaded sleeve (22); a water main pipe (35) is provided at the lower end of the outer side surface of the fixed threaded sleeve (22); a circle of vertical water branch pipes (34) are provided inside the side wall of the fixed threaded sleeve (22); the upper end of the water branch pipe (34) extends into the interior of the fixed threaded sleeve (22), and a nozzle is fixedly provided at the upper end of the water branch pipe (34); the lower end of all the water branch pipes (34) is connected to the water main pipe (35) through a circular connecting pipe, and two symmetrical semicircular chute grooves are provided at the lower end of the inner wall of the fixed threaded sleeve (22), and a semicircular push rod is slidably provided inside each chute. A card plate (38); two symmetrical adjusting bolts (37) are screwed on the lower end of the outer wall of the fixed threaded sleeve (22), and one end of the inner side of the adjusting bolt (37) is rotatably connected to the outer side surface of the push card plate (38) on the same side; a semicircular extrusion air cushion (39) is fixedly provided on the inner side surface of each push card plate (38); a circular arc-shaped reflux groove (40) is provided on the upper end surface of each push card plate (38), and the inner bottom surface of the reflux groove (40) is kept inclined; a reflux pipe (36) is provided at the lower end of the outer side surface of the fixed threaded sleeve (22), and one end of the inner side of the reflux pipe (36) is connected to the lowest point inside the two reflux grooves (40).

2. The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 1, characterized in that: The support frame comprises two vertical multi-telescopic support rods (3), four matching adjustment rods (6) and a horizontal support block (11), the lower ends of the two multi-telescopic support rods (3) are fixedly connected to both sides of the front end of the upper end face of the movable seat (1), the upper ends of the two multi-telescopic support rods (3) are fixedly connected to the left and right ends of the lower end face of the support block (11), and the upper end of each multi-telescopic support rod (3) is rotatably provided with two telescopic matching adjustment rods (6), the lower end of one matching adjustment rod (6) is hinged to the upper end of the movable seat (1), and the lower end of the other matching adjustment rod (6) is connected to the ground.

3. The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 2, characterized in that: The multi-telescopic support rod (3) is formed by a plurality of nested support rods that are sleeved together, and each nested support rod is provided with a plurality of limiting holes. The limiting holes on two adjacent nested support rods are internally inserted with a same limiting pin (8), thereby fixing the two adjacent nested support rods; the upper end of the uppermost nested support rod is fixedly connected to the lower end surface of the support block (11) via a connecting seat.

4. The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 3, characterized in that: The matching adjustment rod (6) comprises a telescopic rod (15), a threaded sleeve (16), and a threaded rod (17); the telescopic rod (15) comprises an inner rod and an outer tube, the inner rod being slidably inserted into the interior of the upper end opening of the outer tube, a threaded sleeve (16) being rotatably provided at the lower end of the outer tube of the telescopic rod (15), and a threaded rod (17) being screwed into the interior of the lower end opening of the threaded sleeve (16); the two matching adjustment rods (6) are respectively located at the rear side of the multi-telescopic support rod (3) and a side away from the other multi-telescopic support rod (3); the upper ends of the inner rods of the telescopic rods (15) of the two matching adjustment rods (6) are both hinged to the connecting seat at the upper end of the multi-telescopic support rod (3), and the lower end of the threaded rod (17) of the matching adjustment rod (6) located at the rear side is rotatably connected to the hinge seat fixedly provided at the upper end of the movable seat (1); A grounding seat (7) is rotatably provided at the lower end of the threaded rod (17) of the matching adjustment rod (6) on the side away from the other multi-telescopic support rod (3), and the grounding seat (7) is fixed on the ground by a ground nail.

5. The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 2, characterized in that: A sliding groove extending forward and backward is provided in the middle of the lower end surface of the support block (11), a clamping groove is provided at the upper end of the inner wall on the left and right sides of the sliding groove, and a row of limiting grooves (12) is provided at the inner bottom surface of each clamping groove. The same sliding plate is slidably provided in the two clamping grooves, a fixed pulley seat (10) is fixedly provided in the middle of the lower end surface of the sliding plate, and the fixed pulley is rotatably provided inside the fixed pulley seat (10); a limiting strip (13) is fixedly provided on the left and right sides of the lower end surface of the sliding plate, and the two limiting strips (13) are respectively clamped in one limiting groove (12) inside the two clamping grooves; a plurality of vertical abutting springs (14) are fixedly provided on the upper end of the sliding plate, and the upper ends of the abutting springs (14) are connected to the upper end surface of the clamping groove.

6. The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 5, characterized in that: The counterweight rod (18) is kept vertical, and the upper end of the counterweight rod (18) is fixedly connected to the end of the steel wire away from the drum; the grouting anchor rod (21) is kept vertical, and the upper end of the grouting anchor rod (21) is fixedly connected to the lower end of the counterweight rod (18) through a connector (19), and the connector (19) is connected to the inside of the grouting anchor rod (21); a grouting port is provided on the side wall of the connector (19), and the grouting port is connected to the pumping grouting machine (9) through a grouting pipe; and a plurality of grouting holes are equidistantly provided on the side wall of the lower half of the grouting anchor rod (21).

7. The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 6, characterized in that: The support seal assembly (20) further comprises an abutting support plate (41), an air pump connecting pipe, a matching threaded sleeve (23), and an inflatable airbag (27); the abutting support plate (41) is a horizontally arranged circular plate-shaped structure, a mounting hole is provided at the center of the abutting support plate (41), a fixed threaded sleeve (22) is fixedly provided on the upper side of the mounting hole, a matching threaded sleeve (23) is screwed to the outer side of the fixed threaded sleeve (22), a circular through hole is provided at the center of the top plate of the matching threaded sleeve (23), and a circle of through holes is provided inside the through holes. Abutment pad (24); an air pressure detection column (25) is provided on the top plate of the mating threaded sleeve (23); two threaded columns (31) are provided on the lower end surface of the abutment support plate (41); the outer sides of the two threaded columns (31) are slidably sleeved with the same horizontal annular limiting plate (30); a locking nut (32) is screwed on the lower ends of the two threaded columns (31); an inflatable airbag (27) is provided between the limiting plate (30) and the abutment support plate (41); the inflatable airbag (27) is sleeved on the outer sides of the two threaded columns (31).

8. The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 7, characterized in that: The grouting anchor rod (21) passes downward through the matching threaded sleeve (23), the fixed threaded sleeve (22), the abutting support plate (41), the inflatable airbag (27), and the limit plate (30) in sequence and then extends into the inside of the bored pile hole; wherein the abutting pad (24) inside the through hole of the matching threaded sleeve (23) maintains close contact with the outer side surface of the grouting anchor rod (21); a first regulating valve (28) is fixedly provided at the upper end of the abutting support plate (41), the first regulating valve (28) is a two-position three-way valve, the inlet of the first regulating valve (28) is connected to the outlet of the air pump through an air pump connecting pipe, an air inlet pipe is fixedly provided at the first outlet of the first regulating valve (28), the air inlet pipe directly passes through the abutting support plate (41) and extends into the inside of the bored pile hole, the second outlet of the first regulating valve (28) is directly connected to the inflatable airbag (27) through an air supply pipe, and a second regulating valve (29) is provided on the air supply pipe.

9. A post-grouting construction method for rammed and expanded cast-in-place piles, characterized in that: The post-grouting and grouting construction device for rammed and expanded cast-in-place piles according to claim 8 is used, and comprises the following steps: Step 1: First, all electrical components are connected to the power supply, and then the entire construction device is moved to the vicinity of the rammed and expanded cast-in-place pile construction site; raw materials are added to the inside of the mud storage and mixing equipment (2), and these raw materials are stirred and mixed evenly to form a slurry; then the height of the support frame is adjusted, and the four matching adjustment rods (6) are connected to the two multi-telescopic support rods (3); after the support frame is installed, the front and rear positions of the fixed pulley seat (10) are adjusted; the end of the steel wire away from the drum is passed around the fixed pulley and connected to the upper end of the counterweight rod (18), and the counterweight rod (18) is at the highest position at this time; the connector (19) is connected to the pumping grouting machine (9) through the grouting pipe; Step 2: Place the abutment support plate (41) on the top of the pile, sleeve the limit plate (30) on the outside of the threaded column (31), and tighten the lock nut (32) at the lower end of the threaded column (31). The limit plate (30) and the abutment support plate (41) jointly provide pre-pressure to the inflatable airbag (27), and then place the abutment support plate (41) at the hole of the bored pile; then screw the matching threaded sleeve (23) on the outside of the fixed threaded sleeve (22); connect the first regulating valve (28) to the air pump through the air pump connecting pipe, connect the inlet of the first regulating valve (28) to the outlet of the air supply pipe, open the second regulating valve (29), and inject compressed air into the inflatable airbag (27) by the air pump, so that the inflatable airbag (27) expands and fits the inner wall of the bored pile hole to ensure the sealing of the bored pile hole; after the inflatable airbag (27) is inflated, close the second regulating valve (29); control The steel wire is released, driving the counterweight rod (18) and the grouting anchor rod (21) to descend as a whole, so that the lower end of the grouting anchor rod (21) passes through the matching threaded sleeve (23), the fixed threaded sleeve (22), the abutment support plate (41), the inflatable airbag (27), and the limit plate (30) in sequence and then extends into the inside of the bored pile hole. The grouting anchor rod (21) stops descending after reaching the specified depth; the abutment pad (24) inside the through hole of the matching threaded sleeve (23) is in close contact with the outer wall of the grouting anchor rod (21) to ensure the sealing of the through hole; then the inlet of the first regulating valve (28) is connected to the outlet of the air inlet pipe, and the air pump continuously injects compressed air into the bored pile hole through the air inlet pipe, pressurizing the inside of the bored pile hole so that the inside of the bored pile hole is kept in a high-pressure state, and the air pressure detection column (25) is used to monitor whether the sealing of the inflatable airbag (27) and the abutment pad (24) meets the requirements; Step 3: injecting slurry into the interior of the grouting anchor rod (21), and spraying the slurry from the grouting hole of the grouting anchor rod (21) into the interior of the bored pile hole. During the grouting process, the operator needs to observe the reading of the air pressure detection column (25) to ensure that the sealing state of the support sealing assembly (20) is good; Step 4: After injecting a sufficient amount of slurry according to the design requirements, stop grouting; wait for the injected slurry to initially solidify, then slowly start the hoisting mechanism (5) to reel in the steel wire and lift the grouting anchor rod (21) out of the supporting sealing assembly (20); Step 5: Before the grouting anchor rod (21) is raised, the two adjusting bolts (37) are tightened so that the two pushing clamps (38) are close to each other, and the squeezing air cushions (39) on the two pushing clamps (38) clamp the grouting anchor rod (21), thereby closing the mounting hole on the abutting support plate (41); then water is injected into the water main pipe (35), and the water main pipe (35) outputs the water flow through the connecting pipe to the inside of each water supply branch (34), and sprays the water from the nozzle at the upper end of the water supply branch (34) to the inside of the fixed threaded sleeve (22), so as to flush the outside of the grouting anchor rod (21); the grouting anchor rod (21) is flushed while being raised upward, and the sewage after flushing enters the inside of the return trough (40), and the sewage inside the return trough (40) is discharged to the outside through the return pipe (36).

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