CN111648368B - Omnibearing grouting device for treating bridge foundation scouring and use method thereof - Google Patents

Abstract

The invention discloses an omnibearing grouting device for treating bridge foundation scouring and a use method thereof, wherein the omnibearing grouting device comprises a construction mechanism, a drilling and grouting mechanism and a protective water cushion forming mechanism; the construction mechanism comprises a positioning steel sleeve capable of being installed on the bridge pier stud and a construction steel platform connected to the outside of the positioning steel sleeve, and the construction steel platform is provided with a plurality of construction windows and a moving platform capable of freely moving to the upper parts of the construction windows; the drilling and grouting mechanism comprises a grouting pipe with a drilling function and grouting equipment connected with the grouting pipe, and the grouting pipe is arranged on the movable platform through drill rod fixing equipment; the protective water cushion forming mechanism comprises a water pump, a water pumping pipe connected with the inlet end of the water pump, a water jetting pipe connected with the outlet end of the water pump and a water spraying ring installed at the end part of the water jetting pipe, and the water pump is installed on the moving platform. The invention can realize the omnibearing flushing pit grouting treatment around the bridge pier stud, and has the advantages of good reinforcing effect, convenient construction and high safety.

Description

Omnibearing grouting device for treating bridge foundation scouring and use method thereof

Technical Field

The invention belongs to the technical field of bridge foundation scour protection, and particularly relates to an all-dimensional grouting device for treating bridge foundation scour and a using method thereof.

Background

The load on the upper part of the bridge structure and the load generated by water flow, waves, wind and the like are generally transmitted to the lower part foundation by the bridge pier, and the bearing capacity of the foundation is directly related to the length of the interaction segment of the surrounding soil body. The bridge foundation often can take place to erode the phenomenon under the water erosion effect, erode and can cause the loss of the surrounding soil body of bridge foundation for the bearing capacity of bridge foundation descends, produces deformation or even destruction. More and more engineering survey reports at home and abroad show that scouring is one of key factors causing bridge structure damage and bridge collapse accidents. In the use process of the bridge, the problem of scouring of soil around the foundation is difficult to avoid and has obvious harm.

By adopting proper scouring protection measures, the depth of a scouring pit around a bridge foundation can be effectively reduced, and the safety and the stability of a bridge structure are improved. Based on different principles, the current scour protection measures are divided into active protection and passive protection. The active protection aims to change or reduce the incoming flow strength and destroy vortex, and the scouring of the bridge foundation is realized by weakening downward jet flow and horseshoe vortex, and the common measures include the arrangement of a pier guard ring, a pier slot, a pier front sacrificial pile, a ring wing type pier and the like. In the using process, the active protection measures of the bridge can be damaged to lose the protection function. The passive protection is that a protective layer is paved on a riverbed around a bridge foundation to improve the resistance of the bridge foundation to the shear stress of incoming flow, and the main measures at present include riprap protection, foundation expansion protection, protective layer paving and the like, and the passive protection is wide in application range and convenient to use, but has the problems that the position of the protective layer is difficult to maintain, extra shrinkage scouring is possibly caused, and the like. For example, the stone throwing protection which is widely adopted carries out the construction of throwing stones on water by running a ship to a construction point, has the problems of limited construction time, easy influence of water flow conditions and weather and the like, and the stone throwing cannot accurately reach the construction point under the influence of water flow, so that a large amount of stones are required, the construction strength is high, and the resource consumption is large. Considering that the problem of bridge foundation scouring has certain unpredictability, the passive protection has more general significance. Based on the idea of passive protection, research and application of pier foundation scouring protection measures and technologies which are used in a large number in bridge engineering are developed, so that accident risks and economic losses caused by the measures can be effectively reduced, and the method has important practical significance and economic significance.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides the omnibearing grouting device for treating bridge foundation scouring and the using method thereof, can realize omnibearing scouring pit grouting treatment around a bridge pier stud, and has the advantages of good reinforcing effect, convenience in construction and high safety.

The invention provides the following technical scheme:

an omnibearing grouting device for treating bridge foundation scouring comprises a construction mechanism, a drilling and grouting mechanism and a protective water cushion forming mechanism;

the construction mechanism comprises a positioning steel sleeve capable of being installed on a bridge pier stud and a construction steel platform connected to the outside of the positioning steel sleeve, and the construction steel platform is provided with a plurality of construction windows and a moving platform capable of freely moving to the upper parts of the construction windows;

the drilling and grouting mechanism comprises a grouting pipe with a drilling function and grouting equipment connected with the grouting pipe, and the grouting pipe is mounted on the mobile platform through drill pipe fixing equipment;

the protective water cushion forming mechanism comprises a water pump, a water pumping pipe connected with the inlet end of the water pump, a water jetting pipe connected with the outlet end of the water pump and a water spraying ring installed at the end part of the water jetting pipe, and the water pump is installed on the moving platform.

Preferably, the location steel bushing includes the location function piece that links to each other through a plurality of overlap joint buckles two symmetries set up, the steel platform that the construction steel platform includes two symmetries that link to each other through matched with equipment hole and equipment tooth sets up, the steel platform is connected in the outside of location function piece.

Preferably, the upper end of the positioning steel sleeve is provided with a plurality of safety buckles; a plurality of multi-lip type vacuum chucks are arranged on the inner side of the positioning steel sleeve, and a vacuum generating device for driving the vacuum chucks and a vacuum generating device cable pipeline connected with the vacuum generating device are arranged outside the positioning steel sleeve; and rubber pads are arranged at the upper edge and the lower edge of the inner side of the positioning steel sleeve.

Preferably, the construction steel platform is further provided with a protective net and pulley rails, the pulley rails are located on two sides of the construction window and arranged around the construction steel platform, and pulleys capable of sliding in the pulley rails are mounted at the bottoms of the protective net and the mobile platform; the protective net covers the upper portion of the construction window which is not occupied by the mobile platform, the two ends of the protective net are provided with rotatable clamping teeth which go deep into the construction window, and the protective net can be fixed above the construction window by rotating the clamping teeth.

Preferably, the mobile platform is provided with a fixed hand brake, and the mobile platform is provided with a construction opening; and a protective fence is arranged on the outer edge of the construction steel platform.

Preferably, the grouting pipe comprises a drill rod, a driving device capable of driving the drill rod to work, a drill bit connected with the bottom end of the drill rod and a grouting pipe connected with the drill rod through a flange, the grouting pipe is connected with the grouting device, the drill rod is installed on the drill rod fixing device, a grouting channel is arranged inside the drill rod, and a plurality of grouting holes are formed in one end, close to the drill bit, of the drill rod.

Preferably, the water pump is provided with a fixed support, and the fixed support is provided with a fixed sleeve for fixing the water jetting pipe; the water spraying ring is provided with a plurality of water spraying holes which are divided into an incident water spraying hole, a lateral water spraying hole and a wake water spraying hole, the incident water spraying hole is arranged in the incident direction of the water spraying ring, the lateral water spraying holes are arranged on two sides of the incident direction of the water spraying ring, the wake water spraying holes are arranged on the opposite sides of the incident direction of the water spraying ring, the jet angles of the three water spraying holes are the same relative to the vertical direction, but the intensity is gradually reduced, the position of the incident water spraying hole is marked on the water jetting pipe, and the water jetting ring rotates correspondingly when the water jetting pipe is rotated.

Preferably, the construction machine further comprises a power supply, and the power supply provides electric energy for the construction mechanism, the drilling and grouting mechanism and the protective water cushion forming mechanism.

The use method of the omnibearing grouting device for treating bridge foundation scouring comprises the following steps:

installing the omnibearing grouting device for treating the bridge foundation scouring;

drilling a grouting pipe with a drilling function into a bridge foundation washing part through a construction window, discharging a water injection pipe through the construction window after drilling into the bridge foundation to a certain depth until a water spray ring at the end part of the water injection pipe is away from the surface of the bridge foundation by a certain distance, rotating to adjust the direction of the water injection pipe, and then connecting the water injection pipe with the outlet end of a water pump;

the grouting pipe is connected with grouting equipment, the grouting equipment is started to start grouting, and when the soil layer is full of grout, grouting is continued for a plurality of minutes and then grouting is stopped;

putting the water pumping pipe into water, starting the water pump to pump water, and when a certain water pressure is reached in the water jetting pipe, jetting water flow by the water jetting ring to form a space closed protective water cushion to counteract flowing water flow in a certain area of the surface of the bridge foundation;

the grouting slurry is changed into quick-hardening concrete, a grouting pipe is lifted, a grouting hole is exposed in a space closed protective water cushion and stops at the bottom of a scouring pit, grouting equipment is started, slurry injected into a bridge foundation in the grouting pipe is discharged by high pressure, grouting pressure is reduced, the quick-hardening concrete flows out of the space closed protective water cushion under protection to fill the scouring pit, and pressure feeding of the quick-hardening concrete is stopped when the calculated filling amount is reached;

pulling out the grouting pipe from the filled quick-hardening concrete, and closing the water pump and pumping out the water injection pipe when the filled quick-hardening concrete is condensed to a certain strength;

and moving the mobile platform and the construction equipment on the mobile platform to other construction windows, and repeating the using steps to realize the omnibearing grouting and the flushing pit filling of the bridge foundation and achieve the aim of protecting the bridge foundation.

Preferably, the installation of the omnibearing grouting device for treating bridge foundation scouring comprises the following steps:

the construction steel platform is sleeved on the bridge pier stud in a suspending way, and the construction steel platform is lapped by fixedly installing the positioning steel sleeve on the bridge pier stud;

fixing the drill rod fixing equipment and the water pump on the moving platform on the bridge floor, then hoisting the moving platform on the construction steel platform and moving the moving platform to a construction window above a construction point;

the grouting pipe with the drilling function is installed through the drill rod fixing equipment, the water pumping pipe and the water jetting pipe are respectively connected to the inlet end and the outlet end of the water pump, and the end part of the water jetting pipe is provided with a water spraying ring.

Compared with the prior art, the invention has the beneficial effects that:

(1) the construction mechanism comprises the positioning steel sleeve and the construction steel platform connected to the outside of the positioning steel sleeve, and the positioning steel sleeve is fixedly arranged on the bridge pier stud, so that the construction steel platform can be lapped and fixed, and the safety construction is facilitated;

(2) the drilling and grouting mechanism comprises a grouting pipe with a drilling function and grouting equipment connected with the grouting pipe, wherein the grouting pipe can drill a weak and weakened soil layer in a certain range below a scour pit to perform grouting construction, so that the weak soil layer at a certain depth below the scour pit is reinforced, and the scour pit can be filled after the grout is spread upwards;

(3) the protective water cushion forming mechanism comprises a water pump, a water pumping pipe connected with the inlet end of the water pump, a water jetting pipe connected with the outlet end of the water pump and a water spraying ring arranged at the end part of the water jetting pipe, wherein the water jetting pipe is connected with the water pump after being lowered to the position near a construction point, and water beams are jetted from water spraying holes on the water spraying ring to form a space closed protective water cushion, so that flowing water in a certain space range of the construction point can be offset, the flow velocity of the water in a certain space at the construction point is reduced, a relatively static underwater construction environment around a grouting construction point is constructed, grouting construction operation is facilitated, uncured grouting bodies are prevented from being taken away by the water flow, and the protective water cushion forming mechanism has;

(4) the construction steel platform is provided with a plurality of construction windows and a movable platform capable of freely moving to the upper part of each construction window, the grouting pipe is installed on the movable platform through drill rod fixing equipment, and the water pump is installed on the movable platform, so that the operation can be carried out along different construction windows, the all-round grouting construction around a bridge pier stud is realized, compared with the conventional common passive scouring protection measures such as stone throwing of ships on water, the all-round scouring pit grouting treatment around the pier can be conveniently realized, and the difficulty of transferring related equipment in the construction process is avoided.

Drawings

FIG. 1 is a front view of the present invention during drilling and grouting (with the guard rail removed);

FIG. 2 is a partial enlarged view of (i) in FIG. 1;

FIG. 3 is a cross-sectional view at C-C of FIG. 2;

FIG. 4 is a side view of the present invention (with the guard rail removed);

FIG. 5 is a top view of a steel jacket and a construction steel platform;

FIG. 6 is a top view of an unassembled steel sleeve and construction steel platform;

FIG. 7 is a side view of a steel jacket and construction steel platform;

FIG. 8 is a cross-sectional view taken at A-A of FIG. 5;

FIG. 9 is a cross-sectional view taken at B-B of FIG. 5;

FIG. 10 is a front elevation view of the present invention with fast hardening concrete poured to fill a scour pit (after removal of the protective fence);

FIG. 11 is an enlarged view of a portion of FIG. 10;

FIG. 12 is a partial enlarged view of section ③ of FIG. 10;

FIG. 13 is a top view of FIG. 12;

FIG. 14 is a cross-sectional view taken at D-D of FIG. 11;

labeled as: 1. positioning the steel sleeve; 1-1, positioning a functional block; 1-2, overlapping and buckling; 2. a vacuum generating device cable duct; 3. a safety buckle; 4. a vacuum chuck; 5. a vacuum generating device; 6. a rubber pad; 7. constructing a steel platform; 7-1, a steel platform; 8. assembling holes; 9. assembling the teeth; 10. constructing a window; 11. a protective net; 12. a pulley track; 13. a mobile platform; 14. clamping teeth; 15. a pulley; 16. a protective fence; 17. a power source; 18. a drive device; 19. drill pipe fixing equipment; 20. a drill bit; 21. a drill stem; 21-1, grouting channels; 21-2, grouting holes; 22. a mud jacking pipe; 23. grouting equipment; 24. a water pump; 25. fixing a bracket; 25-1, fixing sleeves; 26. a water pumping pipe; 27. a water jet pipe; 28. a water spray ring; 28-1, an incident flow water spraying hole; 28-2, side stream water spray holes; 28-3, wake water jet holes; 29. a space closed protective water cushion; 30. drilling; 31. slurry; 32. hardening the concrete quickly; 33. bridge pier stud; 34. bridge foundation.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1, 4 and 5, an omnibearing grouting device for treating bridge foundation scouring comprises a construction mechanism, a drilling and grouting mechanism and a protective water cushion forming mechanism; the construction mechanism comprises a positioning steel sleeve 1 capable of being installed on a bridge pier stud 33 and a construction steel platform 7 connected to the outside of the positioning steel sleeve 1, wherein the construction steel platform 7 is provided with a plurality of construction windows 10 and a moving platform 13 capable of freely moving to the upper part of each construction window 10, and the construction windows 10 are in a fan shape and are arranged around the construction steel platform 7; the drilling and grouting mechanism comprises a grouting pipe with a drilling function and grouting equipment 23 connected with the grouting pipe, and the grouting pipe is arranged on the movable platform 13 through a drill rod fixing device 19; the protective water cushion forming mechanism comprises a water pump 24, a water pumping pipe 26 connected with the inlet end of the water pump 24, a water jetting pipe 27 connected with the outlet end of the water pump 24 and a water spraying ring 28 arranged at the end part of the water jetting pipe 27, wherein the water pump 24 is arranged on the moving platform 13.

As shown in fig. 5-9, the positioning steel sleeve 1 comprises two symmetrically arranged positioning function blocks 1-1 connected through a plurality of lap fasteners 1-2, the construction steel platform 7 comprises two symmetrically arranged steel platforms 7-1 connected through matched assembly holes 8 and assembly teeth 9, and the steel platforms 7-1 are connected to the outside of the positioning function blocks 1-1. The upper end of the positioning steel sleeve 1 is provided with a plurality of safety buckles 3, the safety rope is connected with the upper part of the bridge and the safety buckles 3, and the installation firmness and the safety of the positioning steel sleeve 1 can be improved. The inner side of the positioning steel sleeve 1 is provided with a plurality of multi-lip type vacuum chucks 4, the vacuum chucks 4 are internally provided with an intracavity pressure monitor, the positioning steel sleeve 1 is externally provided with a vacuum generating device 5 for driving the vacuum chucks 4 and a vacuum generating device cable pipeline 2 connected with the vacuum generating device 5, and the vacuum generating device 5 can drive and adjust the adsorption strength of the vacuum chucks 4 according to the intracavity pressure monitor so that the vacuum chucks 4 are tightly attached to the surface of the bridge pier stud 33. Rubber pads 6 are arranged at the upper edge and the lower edge of the inner side of the positioning steel sleeve 1, the rubber pads 6 are made of polyurethane materials, and the thickness of the positioning steel sleeve during extrusion friction deformation meets the thickness required by the vacuum chuck 4 when the positioning steel sleeve is well adsorbed on the surface of the bridge pier stud 33.

As shown in fig. 5 to 9, a protective net 11 and a pulley rail 12 are further arranged on the construction steel platform 7, the pulley rail 12 is located on two sides of the construction window 10 and arranged around the construction steel platform 7, pulleys 15 capable of sliding in the pulley rail 12 are mounted at the bottoms of the protective net 11 and the movable platform 13, so that the movable platform 13 and the protective net 11 are convenient to move, the protective net 11 is conveniently covered above the construction window not occupied by the movable platform, and the construction prop is prevented from dropping or being blocked by constructors. The two ends of the protection net 11 are provided with rotatable latch teeth 14 which go deep into the construction window 10, and the rotary latch teeth 14 can fix the protection net 11 above the construction window 10, so that the safety is high. The movable platform 13 is provided with a fixed hand brake, so that the movable platform 13 is fixed during construction, and the safety is high; the movable platform 13 is provided with a construction opening which is combined with a construction window, so that construction is facilitated; a plurality of fixed screw rods are arranged on the movable platform 13, and the water pump 24 and the drill rod fixing equipment 19 are provided with screw connection holes and fixed on the movable platform 13 through screw connection; the outer edge of the construction steel platform 7 is provided with a protective fence 16, so that the safety of constructors can be improved.

As shown in fig. 1-4, the grouting pipe comprises a drill pipe 21, a driving device 18 capable of driving the drill pipe 21 to work, a drill bit 20 connected with the bottom end of the drill pipe 21, and a grouting pipe 22 connected with the drill pipe 21 through a flange; the driving device 18 drives the drill rod 21 and the drill bit 20 to work, so that a drill hole 30 is formed; the upper part of the grouting pipe 22 is connected with grouting equipment 23, a flange plate joint is arranged at the lower end interface of the grouting pipe 22, and the grouting is realized by connecting the flange plate joint with the drill rod 21; the drill rod 21 is arranged on the drill rod fixing equipment 19, a grouting channel 21-1 is arranged in the drill rod 21, and a plurality of grouting holes 21-2 are formed in one end, close to the drill bit 20, of the drill rod 21, so that grouting is facilitated; the drill rod fixing device 19 has the functions of fixing the drill rod 21, bearing the moment generated when the driving device 18 drives the drill rod 21 to rotate and ensuring that the drill rod 21 is stably drilled downwards.

As shown in fig. 10-14, the water pump 24 is provided with a fixing bracket 25, and the fixing bracket 25 is provided with a controllably closed fixing sleeve 25-1 for fixing the water jet pipe 27; the water spray ring 28 is provided with a plurality of water spray holes which are divided into an incident water spray hole 28-1, a side stream water spray hole 28-2 and a tail stream water spray hole 28-3, the incident water spray hole 28-1 is arranged in the incident direction of the water spray ring 28, the side stream water spray holes 28-2 are arranged on two sides of the incident direction of the water spray ring 28, the tail stream water spray hole 28-3 is arranged on the opposite side of the incident direction of the water spray ring 28, the jet angles of the three water spray holes are the same relative to the vertical direction, but the intensity is gradually reduced, the position of the incident water spray hole 28-1 is marked on the water jet pipe 27, and the water spray ring 28 correspondingly rotates when the water jet pipe 27 is rotated.

As shown in fig. 1 and 4, the all-directional grouting device for treating bridge foundation scouring provided by this embodiment further includes a power supply 17, the power supply 17 supplies electric power to the construction mechanism, the drilling grouting mechanism and the protective water cushion forming mechanism, and specifically, the power supply 17 is connected with the driving device 18, the vacuum generating device 5 and the water pump 24 and supplies electric power for the work of the driving device, the drilling grouting mechanism and the protective water cushion forming mechanism.

Example 2

The installation of the omnibearing grouting device for treating bridge foundation scouring comprises the following steps:

s1, suspending the construction steel platform 7 on the bridge pier stud 33 by matching the assembly teeth 9 and the assembly holes 8 between the two steel platforms 7-1, adjusting the direction of the construction window 10 for convenient construction, and passing the safety rope through the safety buckle 3 and connecting the safety rope to the upper part of the bridge;

s2, starting the vacuum generating device 5, driving the vacuum chuck 4 to adsorb the positioning function block 1-1 on the surface of the bridge pier stud 33, fastening and locking the lap joint buckle 1-2, and completing the fixing of the positioning steel sleeve 1 and the lap joint of the construction steel platform 7;

s3, fixing the drill rod fixing equipment 19 and the water pump 24 on the bridge floor on the movable platform 13 in a threaded manner, then hoisting the movable platform 13 onto the construction steel platform 7 and moving the movable platform to the construction window 10 above a construction point, pulling up the fixed hand brake to fix the movable platform 13, sliding the protective net 11 to the position above the construction window 10 which is not occupied by the movable platform 13, and turning down the latch 14 on the two sides of the protective net 11 to clamp the protective net 11 above the construction window 10;

s4, installing the drill rod 21 with the drill bit 20 through the drill rod fixing device 19, connecting the top end of the drill rod 12 with the mud jacking pipe 22, connecting the water pumping pipe 26 and the water jetting pipe 27 at the inlet end and the outlet end of the water pump 24 respectively, and arranging the water spraying ring 28 at the end of the water jetting pipe 27.

The use method of the omnibearing grouting device for treating bridge foundation scouring comprises the following steps:

d1, after the installation is completed, starting the driving device 18, driving the drill rod 21 to drill towards the scoured part of the bridge foundation 34 through the construction window 10, and observing and recording the drilling depth of the drill rod 21;

d2, after drilling into the bridge foundation 34 to a certain depth, lowering the water jet pipe 27 through the construction window 10 until the water jet ring 28 at the end of the water jet pipe 27 is at a certain distance from the surface of the bridge foundation 34, so that the water jet pipe is not too close to flush away the filled fast hard concrete 32, and the space closed protective water cushion 29 formed by the water jet pipe cannot resist the water flow on the surface of the foundation so that the filling of the fast hard concrete 32 cannot be successful; then the direction of the water injection pipe 27 is adjusted by rotation, so that the incident water spray hole 28-1 on the water spray ring 28 is positioned in the incoming flow direction; then, a fixed sleeve 25-1 on the fixed bracket 25 is closed to fix the water injection pipe 27, and the water injection pipe 27 is connected with the outlet end of the water pump 24;

d3, preparing a bridge deck grouting device 23, connecting a flange joint of the grouting pipe 22 to the drill rod 21, starting the grouting device 23, injecting grout 31 into the drill hole 30 through the grouting hole 21-2, and stopping grouting after grouting for a plurality of minutes when the grout in the soil layer is full (as shown in figures 1 and 2);

d4, putting the water pumping pipe 26 into water, starting the water pump 24 to pump water, and when a certain water pressure is reached in the water injection pipe 27, injecting water by the water injection ring 28 to form a space closed protective water cushion 29 to counteract the flowing water in a certain area of the surface of the bridge foundation (as shown in figure 10);

d5, changing grouting slurry into quick hardening concrete, lifting the drill stem 21 to expose the grouting hole 21-2 in the space closed protective water cushion 29, stopping at the bottom of the scour pit, starting the grouting equipment 23, discharging the slurry injected into the bridge foundation in the drill stem 21 by using high pressure to reduce the grouting pressure, so that the quick hardening concrete 32 flows out of the space closed protective water cushion 29 under protection to fill the scour pit, and stopping pressure feeding of the quick hardening concrete when the calculated filling amount is reached (as shown in figure 10);

d6, lifting the drill rod 21, pulling the drill rod 21 and the drill bit 20 out of the filled quick hardening concrete 32, closing the water pump 24, opening the fixed sleeve 25-1 and drawing out the water jet pipe 27 when the filled quick hardening concrete is condensed to a certain strength;

d7, loosening the fixed hand brake, moving the mobile platform 13 and the construction equipment on the mobile platform 13 to other construction windows 10, repeating the above steps, realizing the omnibearing grouting of the bridge foundation and the filling of the scouring pit, and achieving the aim of protecting the bridge foundation.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An omnibearing grouting device for treating bridge foundation scouring is characterized by comprising a construction mechanism, a drilling grouting mechanism and a protective water cushion forming mechanism;

the construction mechanism comprises a positioning steel sleeve capable of being installed on a bridge pier stud and a construction steel platform connected to the outside of the positioning steel sleeve, and the construction steel platform is provided with a plurality of construction windows and a moving platform capable of freely moving to the upper parts of the construction windows;

the drilling and grouting mechanism comprises a grouting pipe with a drilling function and grouting equipment connected with the grouting pipe, and the grouting pipe is mounted on the mobile platform through drill pipe fixing equipment;

the protective water cushion forming mechanism comprises a water pump, a water pumping pipe connected with the inlet end of the water pump, a water jetting pipe connected with the outlet end of the water pump and a water spraying ring installed at the end part of the water jetting pipe, and the water pump is installed on the moving platform.

2. The all-round slip casting device of processing bridge foundation erodees of claim 1, characterized in that, the location steel bushing includes two symmetrical setting's that link to each other through a plurality of overlap joint buckles location function block, the construction steel platform includes two symmetrical setting's that link to each other through matched with equipment hole and equipment tooth steel platform, the steel platform is connected in the outside of location function block.

3. The omnibearing grouting device for treating bridge foundation scour according to claim 1, wherein the upper end of the positioning steel sleeve is provided with a plurality of safety buckles; a plurality of multi-lip type vacuum chucks are arranged on the inner side of the positioning steel sleeve, and a vacuum generating device for driving the vacuum chucks and a vacuum generating device cable pipeline connected with the vacuum generating device are arranged outside the positioning steel sleeve; and rubber pads are arranged at the upper edge and the lower edge of the inner side of the positioning steel sleeve.

4. The omnibearing grouting device for treating bridge foundation scouring according to claim 1, wherein a protective net and pulley rails are further arranged on the construction steel platform, the pulley rails are positioned on two sides of the construction window and arranged around the construction steel platform, and pulleys capable of sliding in the pulley rails are mounted at the bottoms of the protective net and the mobile platform; the protective net covers the upper portion of the construction window which is not occupied by the mobile platform, the two ends of the protective net are provided with rotatable clamping teeth which go deep into the construction window, and the protective net can be fixed above the construction window by rotating the clamping teeth.

5. The omnibearing grouting device for treating bridge foundation scour according to claim 1, wherein the mobile platform is provided with a fixed hand brake, and the mobile platform is provided with a construction opening; and a protective fence is arranged on the outer edge of the construction steel platform.

6. The omnibearing grouting device for treating bridge foundation scouring according to claim 1, wherein the grouting pipe comprises a drill pipe, a driving device capable of driving the drill pipe to work, a drill bit connected with the bottom end of the drill pipe and a grouting pipe connected with the drill pipe through a flange, the grouting pipe is connected with the grouting device, the drill pipe is mounted on the drill pipe fixing device, a grouting channel is arranged inside the drill pipe, and a plurality of grouting holes are formed in one end, close to the drill bit, of the drill pipe.

7. The omnibearing grouting device for treating bridge foundation scour according to claim 1, wherein a fixed bracket is arranged on the water pump, and the fixed bracket is provided with a fixed sleeve for fixing the water jetting pipe; the water spraying ring is provided with a plurality of water spraying holes which are divided into an incident water spraying hole, a lateral water spraying hole and a wake water spraying hole, the incident water spraying hole is arranged in the incident direction of the water spraying ring, the lateral water spraying holes are arranged on two sides of the incident direction of the water spraying ring, the wake water spraying holes are arranged on the opposite sides of the incident direction of the water spraying ring, the jet angles of the three water spraying holes are the same relative to the vertical direction, but the intensity is gradually reduced, the position of the incident water spraying hole is marked on the water jetting pipe, and the water jetting ring rotates correspondingly when the water jetting pipe is rotated.

8. The omnibearing grouting device for treating bridge foundation scouring according to claim 1, further comprising a power supply, wherein the power supply supplies electric energy to the construction mechanism, the drilling and grouting mechanism and the protective water cushion forming mechanism.

9. The use method of the omnibearing grouting device for treating bridge foundation scouring based on any one of claims 1-8 is characterized by comprising the following steps:

installing the omnibearing grouting device for treating the bridge foundation scouring;

the grouting pipe with the drilling function drills into a bridge foundation scouring part through the construction window, after the grouting pipe drills into the bridge foundation to a certain depth, the grouting pipe drills into a weak soil layer in a certain range below a scouring pit, the water jetting pipe is lowered through the construction window until a water spraying ring at the end part of the water jetting pipe is away from the surface of the bridge foundation by a certain distance, the direction of the water jetting pipe is rotationally adjusted, and then the water jetting pipe is connected with the outlet end of the water pump;

the grouting pipe is connected with grouting equipment, the grouting equipment is started to start grouting, and when the soil layer is full of grout, grouting is continued for a plurality of minutes and then grouting is stopped;

putting the water pumping pipe into water, starting the water pump to pump water, and when a certain water pressure is reached in the water jetting pipe, jetting water flow by the water jetting ring to form a space closed protective water cushion to counteract flowing water flow in a certain area of the surface of the bridge foundation;

the grouting slurry is changed into quick-hardening concrete, a grouting pipe is lifted, a grouting hole is exposed in a space closed protective water cushion and stops at the bottom of a scouring pit, grouting equipment is started, slurry injected into a bridge foundation in the grouting pipe is discharged by high pressure, grouting pressure is reduced, the quick-hardening concrete flows out of the space closed protective water cushion under protection to fill the scouring pit, and pressure feeding of the quick-hardening concrete is stopped when the calculated filling amount is reached;

pulling out the grouting pipe from the filled quick-hardening concrete, and closing the water pump and pumping out the water injection pipe when the filled quick-hardening concrete is condensed to a certain strength;

and moving the mobile platform and the construction equipment on the mobile platform to other construction windows, and repeating the using steps to realize the omnibearing grouting and the flushing pit filling of the bridge foundation and achieve the aim of protecting the bridge foundation.

10. The use method of the omnibearing grouting device for treating the bridge foundation scour according to claim 9, wherein the installation of the omnibearing grouting device for treating the bridge foundation scour comprises the following steps:

the construction steel platform is sleeved on the bridge pier stud in a suspending way, and the construction steel platform is lapped by fixedly installing the positioning steel sleeve on the bridge pier stud;

fixing the drill rod fixing equipment and the water pump on the moving platform on the bridge floor, then hoisting the moving platform on the construction steel platform and moving the moving platform to a construction window above a construction point;

the grouting pipe with the drilling function is installed through the drill rod fixing equipment, the water pumping pipe and the water jetting pipe are respectively connected to the inlet end and the outlet end of the water pump, and the end part of the water jetting pipe is provided with a water spraying ring.

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