CN116289874A - Ground pore-forming equipment and ground pore-forming grouting method - Google Patents

Abstract

The invention relates to the technical field of civil engineering, in particular to ground pore-forming equipment and a ground pore-forming grouting method, wherein the ground pore-forming equipment comprises a support frame and a drill rod, a hammering device and a lifting device for driving the hammering device to move up and down are arranged on the support frame, the drill rod comprises a plurality of sections of sub-rod bodies which are sequentially and detachably connected from bottom to top to form rod bodies, the lifting device drives the hammering device to move down, and the sub-rod bodies below a hammering mechanism can be pressed into the ground; the lifting device drives the hammering device to move upwards, so that the distance between the hammering device and the ground is increased, an installation space is formed, the installation space is used for connecting the sub-rod bodies to be connected to the sub-rod bodies pressed into the ground, the hammering device is driven to move downwards again, and the hammering device can press the sub-rod bodies to be connected into the ground; therefore, the ground hole forming equipment can press the multi-section sub-rod bodies into the ground respectively, so that the total height of the hole forming equipment is reduced, and the drilling requirement at the position with limited height is met.

Description

Ground pore-forming equipment and ground pore-forming grouting method

Technical Field

The invention relates to the technical field of civil engineering, in particular to ground pore-forming equipment and a ground pore-forming grouting method.

Background

Grouting is often used for seepage prevention and reinforcement of poor soil, grouting holes are drilled in the soil before grouting, grouting is performed in the grouting holes, slurry in the grouting holes is filled, permeated, squeezed and the like, so that moisture and air in soil particles or rock cracks are discharged, after manual control is performed for a certain time, the slurry bonds original loose soil particles or cracks into a whole, and a combination body with a novel structure, high strength, high waterproof performance and good chemical property is formed.

Most of the infrastructures of the embankments and channels in China, especially the embankments or buildings in cities, are complex in structure, the construction environment is narrow, and particularly when the positions needing to be drilled are limited in height, large drilling type is difficult to use.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: when the construction environment of the part needing to be drilled has high limit on the equipment height, the large-scale drilling equipment cannot meet the use requirement.

In order to solve the technical problems, the invention aims to provide ground hole forming equipment, which comprises a support frame and a drill rod, wherein the support frame is provided with a hammering device and a lifting device for driving the hammering device to move up and down, the drill rod comprises a plurality of sections of sub-rod bodies which are sequentially and detachably connected from bottom to top to form rod bodies, and the lifting device drives the hammering device to move down so that the hammering device presses the sub-rod bodies below the hammering device into the ground; the lifting device drives the hammering device to move upwards, so that an installation space is formed between the hammering device and the ground, and the installation space is used for connecting the sub rod bodies to be connected to the sub rod bodies pressed into the ground.

Preferably, the hammering device includes a counter for recording the number of hammering times of the hammering device.

As the preferable scheme, be located the upper portion of the sub-body of rod of drilling rod top is equipped with first rings, hammering device is including upper and lower slip direction connection slider on the support frame and articulated the fixed station of slider one side, the fixed station can back and forth swinging, be equipped with the hammer block and be used for the drive on the fixed station the drive mechanism of reciprocating motion about the hammer block, the slider upper end is equipped with the second rings.

As a preferable scheme, the hammer body is connected to the fixed table in a vertically sliding guiding way, the driving mechanism comprises a rotary driving device and a cam structure which is connected to an output shaft of the rotary driving device in a rotation stopping way, one side of the hammer body is provided with a stop block, and the lower end of the stop block is in butt joint with the cam structure.

As a preferable scheme, the inside of the hammer body is provided with a containing cavity, and the containing cavity is internally provided with configuration sand for adjusting the weight of the hammer.

Preferably, the lifting device comprises a winch and a lifting rope wound on a winding wheel of the winch, the winch is arranged at the rear side of the supporting frame, the hammering device is arranged at the front side of the supporting frame, and the lifting end of the lifting rope spans over the top of the supporting frame and is connected with the hammering device.

The ground pore-forming grouting method uses the ground pore-forming equipment, and comprises the following steps:

s1, placing a support frame at a position to be drilled;

s2, moving up the hammering device by using a lifting device, and placing a first section of sub-rod body below the hammering device;

s3, moving down the hammering device by using the lifting device, starting the hammering device, hammering the first section of sub-rod body, and pressing the first section of sub-rod body into the ground;

s4, moving the hammering device upwards by using the lifting device, and connecting a second section of sub-rod body to the upper end of the first section of sub-rod body;

s5, circulating the steps S3 to S4 until all the sub rod bodies are pressed into the ground;

s6, pulling out the drill rod;

and S7, grouting into the drilled hole.

In the step S3, in the hammering process of the first segment of the sub-rod body, a counter is used to record the hammering times when the depth of the first segment of the sub-rod body entering the soil body is a set depth; and adjusting the hammer weight of the hammer body so that the hammering times of the first section of sub-rod body when the depth of the first section of sub-rod body entering the soil body is the set depth are larger than or equal to the first set times and smaller than or equal to the second set times.

Preferably, the "pulling out the drill rod" in the step S6 includes:

and detaching the second lifting ring from the lifting end of the lifting device, swinging the fixed table to one side of the supporting frame, connecting the first lifting ring to the output end of the lifting device, and lifting the drill rod by using the lifting device.

Preferably, in the step S5, the number of hammering times spent by each sub-rod body when each sub-rod body is deepened to a set depth is recorded, and the step S7 of grouting into the borehole includes:

and S7, grouting is carried out in the drill hole from bottom to top in a sectional manner, the grouting pressure of each section is determined according to the set depth and the hammering times consumed by the corresponding set depth, and the grouting pressure of the section with more hammering times is larger than the grouting pressure of the section with less hammering times.

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

the ground hole forming equipment comprises a support frame and a drill rod, wherein the support frame is provided with a hammering device and a lifting device for driving the hammering device to move up and down, the drill rod comprises a plurality of sections of sub rod bodies which are sequentially and detachably connected from bottom to top to form rod bodies, the lifting device drives the hammering device to move down, and the sub rod bodies below a hammering mechanism can be pressed into the ground; the lifting device drives the hammering device to move upwards, so that the distance between the hammering device and the ground is increased, an installation space is formed, the installation space is used for connecting the sub-rod bodies to be connected to the sub-rod bodies pressed into the ground, the hammering device is driven to move downwards again, and the hammering device can press the sub-rod bodies to be connected into the ground; therefore, the ground hole forming equipment can press the multi-section sub-rod bodies into the ground respectively, so that the total height of the hole forming equipment is reduced, and the use requirement of the part needing to be drilled with limited height of the equipment is met.

Drawings

FIG. 1 is a side view of a ground surface hole forming apparatus of the present invention;

FIG. 2 is a front view of the floor hole forming apparatus of the present invention;

FIG. 3 is a top view of the floor pore-forming apparatus of the present invention;

FIG. 4 is a schematic view of the hammer assembly as the ram is raised;

FIG. 5 is a schematic view of the hammer device in a hammer down configuration;

FIG. 6 is a schematic structural view of a lifting device;

FIG. 7 is a schematic view of the structure of the stationary platen and the slider with the hammering device in the hammering position;

FIG. 8 is a schematic view of the structure of the stationary platen and the slide block with the hammering device in the non-hammering position;

FIG. 9 is a schematic view of the structure between the cam structure and the stop when the ram is at the highest point;

in the figure, 1, a supporting frame; 2. a drill rod; 3. a hammering device; 31. a counter; 32. a slide block; 33. a fixed table; 35. a driving mechanism; 351. a rotation driving device; 352. a cam structure; 3521. a cam body; 3522. a horizontal column; 36. a stop block; 4. a lifting device; 41. a hoist; 42. a lifting rope.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.

As shown in fig. 1 to 8, a preferred embodiment of a ground hole forming device of the present invention includes a support frame 1 and a drill rod 2, wherein a hammering device 3 and a lifting device 4 for driving the hammering device 3 to move up and down are provided on the support frame 1, the drill rod 2 includes a plurality of sections of sub-rod bodies which are detachably connected in sequence from bottom to top to form a rod body, and the lifting device 4 drives the hammering device 3 to move down so that the hammering device 3 presses the sub-rod body located below the hammering device 3 into the ground; the lifting device 4 drives the hammering device 3 to move upwards so that an installation space is formed between the hammering device 3 and the ground, and the installation space is used for connecting the sub-rod bodies to be connected to the sub-rod bodies pressed into the ground. The lifting device 4 drives the hammering device 3 to move downwards, so that a sub rod body below the hammering mechanism 3 can be pressed into the ground; the lifting device 4 drives the hammering device 3 to move upwards, so that the distance between the hammering device 3 and the ground is increased, an installation space is formed, the sub rod bodies to be connected are connected to the sub rod bodies pressed into the ground, the hammering device 3 is driven to move downwards by the lifting device 4 again, and the hammering device 3 can press the sub rod bodies to be connected into the ground; therefore, the ground hole forming equipment can press the multi-section sub-rod bodies into the ground respectively, so that the total height of the hole forming equipment is reduced, and the use requirement of the part needing to be drilled with limited height of the equipment is met.

The upper end of the lower rod body is coaxially provided with a threaded hole, and the lower end of the upper rod body is coaxially provided with a threaded section which is in threaded connection with the threaded hole; the hammering device 3 includes a counter 31 for recording the number of hammering times of the hammering device. Specifically, by recording the hammering times and the depth of the drill rod in the corresponding hammering times, the geological strength of the position where the drill hole is located can be judged, so that grouting parameters are changed according to the geological strength, and the soil body is fully impermeable and reinforced.

In this embodiment, a first hanging ring is disposed on the upper portion of the sub rod body located at the uppermost end of the drill rod 2, the hammering device 3 includes a sliding block 32 connected to the support frame 1 in a vertically sliding guiding manner, and a fixing table 33 hinged to one side of the sliding block 32, the fixing table 33 can swing back and forth, a hammer 34 and a driving mechanism 35 for driving the hammer 34 to reciprocate up and down are disposed on the fixing table 33, and a second hanging ring is disposed at the upper end of the sliding block 32. Specifically, as shown in fig. 7 and 8, after the drilling of the drill rod 2 is completed, the lifting hook of the lifting device 4 is removed from the second lifting ring, and then the fixed table 13 is swung, so that the fixed table 13 and the hammer 34 arranged on the fixed table 13 are swung to one side of the supporting frame; and then, the lifting hook of the lifting device 3 is connected to the first lifting ring, and finally, the drill rod 2 inserted in the soil body is pulled out from the soil body by utilizing the lifting device 3, so that the drill rod 2 is pulled out. Therefore, the hoisting device 4 of the present invention can not only hoist the hammering device 3 but also pull out the drill rod 2.

Specifically, the lower end of the fixed table 13 is provided with a first locking mechanism for locking the fixed table to the slider. In this embodiment, the first locking mechanism is a first fastening screw, and the first fastening screw passes through the fixing table 13 and is screwed with the slider, so that the first fastening screw can be screwed out from the slider when the fixing table needs to be swung. The second locking mechanism for locking the sliding block on the supporting frame is arranged on the sliding block, in the embodiment, the supporting frame comprises a base and a supporting column fixed on the base, the sliding block is a sleeve sleeved outside the supporting column, the second locking mechanism is a second fastening screw penetrating through the sleeve in the radial direction of the sleeve, and the end part of the second fastening screw is abutted with the outer side of the supporting column to lock the sleeve.

In this embodiment, the hammer 34 is connected to the fixed table 33 in a vertically sliding and guiding manner, the driving mechanism 35 includes a rotation driving device 351 and a cam structure 352 connected to an output shaft of the rotation driving device 351 in a rotation stopping manner, one side of the hammer 34 is provided with a stopper 36, and a lower end of the stopper 36 abuts against the cam structure 352. Specifically, a guide rail arranged vertically is fixed on the fixed table 33, and the hammer 34 is connected to the guide rail; as shown in fig. 9, the cam structure 352 includes a cam body 3521 and a horizontal post 3522 fixed on one side of the cam body 3521 facing away from the rotation driving device 351, the outer side of the horizontal post 3522 is abutted against the lower end of the stop block 36, the stop block 36 is rectangular, the stop block 36 is horizontally arranged, the length of the stop block 36 is greater than the rotation radius of the horizontal post 3522, and the projection of the rotation center of the horizontal post 3522 on the stop block 36 along the vertical direction is arranged near the rear end of the stop block 36, so that when the stop block 36 is pushed by the horizontal post 3522 to move upwards, the lower end of the stop block 36 is always abutted against the outer side of the horizontal post 3522, and when the stop block 36 moves downwards, the stop block 36 is separated from the horizontal post 3522, so that the hammer 34 can perform free falling body movement when falling.

In this embodiment, the hammer 34 has a housing chamber in which sand for adjusting the weight of the hammer is disposed. The hammer force can be varied by varying the weight of the ram 34 so that the weight of the ram 34 is compatible with the underlying strength; specifically, when drilling, the counter is used to obtain the number of hammering times required for the first sub-rod body to be deep to a specific depth, and when the number of hammering times is smaller than or equal to the first set number of times, the weight of the hammer 34 is reduced, because if the weight of the hammer 34 is too heavy, the number of hammering times per set depth is too small, in this embodiment, the strength of the soil layer needs to be judged through the number of hammering times, and if the number of hammering times in the unit depth is too small, the recognition accuracy of the strength of the soil layer is too low; when the required hammering times are larger than or equal to the first set times when the depth of the first sub-rod body is a specific depth, the weight of the hammer body needs to be increased, so that the low drilling efficiency caused by the excessively high hammering times is avoided. In this embodiment, the hoisting device 4 includes a hoist 41 and a hoisting rope 42 wound on a reel of the hoist 41, the hoist 41 is disposed at the rear side of the support frame 1, the hammering device 3 is disposed at the front side of the support frame 1, and a hoisting end of the hoisting rope 42 spans the top of the support frame 1 and is connected with the hammering device 3. Specifically, the upper end of the support column is provided with a guide pulley, and a lifting rope 42 spans the guide pulley and is connected to the upper end of the hammer 34 or the borehole.

In this embodiment, the lower extreme of support frame is equipped with a plurality of gyro wheels to and a plurality of scalable supporting leg, but through gyro wheel nimble removal support frame, after removing the support frame to specific position, the length of extension supporting leg not only can fix the support frame subaerial, can make the support frame be in the horizontality through the length of each supporting leg of adjustment moreover for the support frame can use on the uneven ground of slope, and scalable supporting leg can adopt the structure of telescopic stud. In this embodiment, hammering device 3 and hoisting accessory 4 are all through the detachable connection of bolt on the support frame, wait to bore the back of finishing, can demolish hammering device 3 and hoisting accessory 4 from the support frame to the transportation of the ground pore-forming equipment of being convenient for improves the portability of ground pore-forming equipment.

An embodiment of a ground hole-forming grouting method by using the ground hole-forming equipment comprises the following steps:

s1, placing a support frame 1 at a position to be drilled;

s2, lifting the hammering device 3 by using the lifting device 4, and placing the first section of sub-rod body below the hammering device 3;

s3, moving down the hammering device 3 by using the lifting device 4, starting the hammering device 3, hammering the first section of sub-rod body, and pressing the first section of sub-rod body into the ground;

s4, utilizing a lifting device 4 to move up the hammering device 3, and connecting the second section of sub-rod body to the upper end of the first section of sub-rod body;

s5, circulating the steps S3 to S4 until all the sub rod bodies are pressed into the ground;

s6, pulling out the drill rod;

and S7, grouting into the drilled hole.

In step S3, during hammering the first segment of sub-rod body, the counter 31 is used to record the number of hammering times when the depth of the first segment of sub-rod body entering the soil body is a set depth; the hammer weight of the hammer 34 is adjusted so that the number of hammering times when the depth of the first segment of the sub-rod body entering the soil body is a set depth is greater than or equal to the first set number of times and less than or equal to the second set number of times. Specifically, in this embodiment, the depth is set to 50CM, the first set number of times is 30 times, and the second set number of times is 200 times. The initial weight of the hammer body is 25KG, and when the weight of the hammer body is changed, 10KG can be increased or reduced each time. In order to facilitate the observation of the depth of the drill rod 2 by the staff, in this embodiment, scale marks are provided on the outside of the drill rod. In the pore-forming process, the zero clearing button is recorded and pressed every time the drill rod is deep by 50CM, so that the hammering times are recorded. Through the hammering times when the depth of the first section of the sub-rod body into the soil body is the set depth is greater than or equal to the first set times and less than or equal to the second set times, the drilling efficiency can be ensured, and too low resolution ratio of the soil body strength caused by the fact that the single depth of the sub-rod body is too large when the sub-rod body is hammered can be avoided. Although the drilling type drilling machine is used for evaluating the drilling resistance of the rock-soil body through the drilling speed and the like, the mechanical property of the rock-soil body is further determined. However, the method is generally only used for evaluating the rock strength, the strength of the soil body is still small even though the soil body is compacted or solidified, the drilling force of a drilling machine is overlarge, the precision is not enough, and the mechanical property of the soil body is difficult to evaluate accurately. The invention can judge the mechanical property of the soil body through the hammering times, so as to determine the weak part of the soil body, thereby providing basis for the design of grouting parameters.

Further, the "pulling out the drill rod" in step S6 includes:

the second hoisting ring is removed from the hoisting end of the hoisting device 4, the fixing table 33 is swung to one side of the supporting frame 1, the first hoisting ring is connected to the output end of the hoisting device 4, and the drill rod 2 is hoisted by the hoisting device 4.

In step S5, the number of hammering times spent by each sub-rod body when each sub-rod body is deepened to the set depth is recorded, and step S7 of grouting into the borehole includes:

grouting is carried out in sections from bottom to top in the drilling holes, grouting pressure of each section is determined according to the set depth and the hammering times consumed by the corresponding set depth, and grouting pressure of the section with more hammering times is larger than grouting pressure of the section with less hammering times. Specifically, the formation condition may be determined based on the number of hammers per 50cm depth. If the hammering times of 50cm depth is less than or equal to 50 hammers, the stratum at the position is very weak, and the grouting amount at the position during repairing is twice the designed grouting amount; if the hammering times of 50cm depth is less than or equal to 100 hammers, the stratum at the position is weak, the grouting is needed to be supplemented during repairing, and the grouting amount is one time of the designed grouting amount; if the hammering times of 50cm depth is more than 100 hammers, the part is normally grouting and repaired according to the design scheme.

In summary, the ground hole forming equipment of the invention comprises a support frame 1 and a drill rod 2, wherein the support frame 1 is provided with a hammering device 3 and a lifting device 4 for driving the hammering device 3 to move up and down, the drill rod 2 comprises a plurality of sections of sub-rod bodies which are sequentially and detachably connected from bottom to top to form rod bodies, and the lifting device 4 drives the hammering device 3 to move down so that the hammering device 3 presses the sub-rod bodies below the hammering device 3 into the ground; the lifting device 4 drives the hammering device 3 to move upwards so that an installation space is formed between the hammering device 3 and the ground, and the installation space is used for connecting the sub-rod bodies to be connected to the sub-rod bodies pressed into the ground. The lifting device 4 drives the hammering device 3 to move downwards, so that a sub rod body below the hammering mechanism 3 can be pressed into the ground; the lifting device 4 drives the hammering device 3 to move upwards, so that the distance between the hammering device 3 and the ground is increased, an installation space is formed, the sub rod bodies to be connected are connected to the sub rod bodies pressed into the ground, the hammering device 3 is driven to move downwards by the lifting device 4 again, and the hammering device 3 can press the sub rod bodies to be connected into the ground; therefore, the ground hole forming equipment can press the multi-section sub-rod bodies into the ground respectively, so that the total height of the hole forming equipment is reduced, and the use requirement of the part needing to be drilled with limited height of the equipment is met.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims (10)

1. The ground pore-forming equipment is characterized by comprising a support frame (1) and a drill rod (2), wherein a hammering device (3) and a lifting device (4) for driving the hammering device (3) to move up and down are arranged on the support frame (1), the drill rod (2) comprises a plurality of sections of sub rod bodies which are sequentially and detachably connected from bottom to top to form a rod body, and the lifting device (4) drives the hammering device (3) to move down so that the hammering device (3) presses the sub rod bodies below the hammering device (3) into the ground; the lifting device (4) drives the hammering device (3) to move upwards, so that an installation space is formed between the hammering device (3) and the ground, and the installation space is used for connecting the sub rod bodies to be connected to the sub rod bodies pressed into the ground.

2. A ground surface hole forming apparatus according to claim 1, characterized in that the hammering device (3) comprises a counter (31) for registering the number of hammering times of the hammering device.

3. The ground hole forming equipment according to claim 1, wherein a first hanging ring is arranged on the upper portion of the sub rod body at the uppermost end of the drill rod (2), the hammering device (3) comprises a sliding block (32) connected to the supporting frame (1) in a vertically sliding guiding manner and a fixed table (33) hinged to one side of the sliding block (32), the fixed table (33) can swing back and forth, a hammer body (34) and a driving mechanism (35) for driving the hammer body (34) to reciprocate up and down are arranged on the fixed table (33), and a second hanging ring is arranged at the upper end of the sliding block (32).

4. A ground surface hole forming apparatus according to claim 3, wherein the hammer body (34) is connected to the fixed table (33) in a vertically sliding guiding manner, the driving mechanism (35) comprises a rotary driving device (351) and a cam structure (352) which is connected to an output shaft of the rotary driving device (351) in a rotation stopping manner, a stopper (36) is provided on one side of the hammer body (34), and a lower end of the stopper (36) abuts against the cam structure (352).

5. A ground boring apparatus according to claim 3, characterized in that the hammer body (34) is internally provided with a receiving chamber in which the setting sand for adjusting the hammer weight is provided.

6. Ground hole forming apparatus according to claim 1, characterized in that the hoisting device (4) comprises a hoisting machine (41) and a hoisting rope (42) wound on a reel of the hoisting machine (41), the hoisting machine (41) is arranged at the rear side of the support frame (1), the hammering device (3) is arranged at the front side of the support frame (1), and the hoisting end of the hoisting rope (42) spans the top of the support frame (1) and is connected with the hammering device (3).

7. A ground surface hole-forming grouting method, characterized by using the ground surface hole-forming apparatus as claimed in any one of claims 1 to 6, comprising the steps of:

s1, placing a support frame (1) at a position to be drilled;

s2, lifting the hammering device (3) by using the lifting device (4), and placing the first section of sub-rod body below the hammering device (3);

s3, utilizing the lifting device (4) to move down the hammering device (3), starting the hammering device (3), hammering the first section of sub-rod body, and pressing the first section of sub-rod body into the ground;

s4, utilizing the lifting device (4) to move up the hammering device (3), and connecting a second section of sub-rod body to the upper end of the first section of sub-rod body;

s5, circulating the steps S3 to S4 until all the sub rod bodies are pressed into the ground;

s6, pulling out the drill rod;

and S7, grouting into the drilled hole.

8. The ground hole-forming grouting method according to claim 7, wherein in the step S3, during the hammering of the first segment of the sub-rod body, a counter (31) is used to record the number of hammering times when the depth of the first segment of the sub-rod body into the soil body is a set depth; and adjusting the hammer weight of the hammer body (34) so that the hammering times of the first section of sub-rod body when the depth of the first section of sub-rod body entering the soil body is the set depth are larger than or equal to the first set times and smaller than or equal to the second set times.

9. The ground hole-forming grouting method according to claim 7, wherein the step S6 of "pulling out the drill pipe" comprises:

and detaching the second lifting ring from the lifting end of the lifting device (4), swinging the fixed table (33) to one side of the supporting frame (1), connecting the first lifting ring to the output end of the lifting device (4), and lifting the drill rod (2) by using the lifting device (4).

10. The ground hole-forming grouting method according to claim 7, wherein in the step S5, the number of hammering times spent for each sub-rod body every time the sub-rod body is deepened to a set depth is recorded, and the step S7 of grouting into the borehole comprises:

and S7, grouting is carried out in the drill hole from bottom to top in a sectional manner, the grouting pressure of each section is determined according to the set depth and the hammering times consumed by the corresponding set depth, and the grouting pressure of the section with more hammering times is larger than the grouting pressure of the section with less hammering times.

Images