Hole guiding device for arranging drain board in surface rock-filled field

Abstract

A hole guiding device for driving a drain board in a surface rock-filled field comprises a vibratory hammer, a steel pipe and a steel chisel. The steel pipe and the vibratory hammer are connected through a switch support, the steel pipe is arranged outside the steel chisel in a sleeving mode and extends out of the head of the steel pipe, the tail of the steel chisel is flush with the tail of the steel pipe, and the vibratory hammer is perpendicularly connected to the tail of the steel pipe and the tail of the steel chisel so as to apply vibratory impact to the steel pipe and the tail of the steel chisel. The utility model further discloses a method for punching the drain board by using the hole guiding device. The method comprises the following steps of: punching the steel chisel and the steel pipe into a hard shell layer including filled stones or filled soil; releasing the connection between the steel pipe and the vibratory hammer; hoisting the vibratory hammer, pulling out the steel chisel, and leaving the steel pipe in the foundation; arranging a plastic drainage plate from the center of the steel pipe; pulling out the steel pipe. When the surface layer of a soft soil field is provided with hard shell layers such as filled stones or filled soil, the problem that the drainage plate is difficult to drive can be effectively solved, the construction quality and efficiency are improved, and meanwhile the construction cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical engineering, and relates to the construction of reinforced foundation in soft soil sites, especially the hole-leading device for driving drainage plates for reinforcement. Background Technique

[0002] The method of driving drainage plates for drainage consolidation to reinforce the foundation in soft soil sites is an economical and effective method. On the other hand, when there is a hard shell layer such as rockfill or fill on the surface of the soft soil site, it is often very difficult to drive the drainage plates. To solve this problem, although the method of excavating the hard shell layer such as rockfill or fill on the surface can be adopted, this method is not very applicable when the hard shell layer is relatively thick because the excavation difficulty is large, the requirements for backfill materials are high, and the cost is high. Currently, most of them adopt the method of leading holes. First, a hole is drilled in the hard shell layer of the rockfill or fill on the surface of the foundation, and then the drainage plate is driven into the soft soil layer from the hole. The disadvantage of this method is that due to the easy collapse of the hard shell layer of the rockfill or fill, the phenomenon that the drainage plate cannot be driven down often occurs, which affects the construction. Content of the Utility Model

[0003] Aiming at the problems and defects existing in the prior art, the purpose of the utility model is to provide a hole-leading device for driving drainage plates in a surface rockfill site, so as to solve the problem of difficult driving of drainage plates when there is rockfill or fill on the surface of soft soil foundation.

[0004] The utility model adopts the following technical scheme:

[0005] A hole-leading device for driving drainage plates in a surface rockfill site includes a vibrating hammer, a steel pipe, a steel drill rod, a steel drill rod tooth cutter, and a steel pipe bending plate; the steel pipe is connected to the vibrating hammer by a switch support, the steel pipe is sleeved outside the steel drill rod and extends from the head of the steel pipe, the tail of the steel drill rod is flush with the tail of the steel pipe, and the vibrating hammer is vertically connected to the tails of the steel pipe and the steel drill rod to apply vibration impact to them.

[0006] Preferably, the head of the steel drill rod is conical.

[0007] Preferably, the switch support includes a support body fixed on the top of the steel pipe and a connecting piece detachably connected to the support body. The connecting piece is used to connect with the vibrating hammer, and a locking mechanism for quickly locking or releasing is arranged between the connecting piece and the support body. The locking mechanism is bolt locking, buckle locking or hydraulic locking to realize the quick connection and disassembly of the steel pipe and the vibrating hammer.

[0008] Preferably, the steel drill rod is made of high-strength and high-toughness alloy steel material, the head of the steel drill rod is conical, and the cone angle range of the cone is 60°-90°; preferably, the cone angle of the head of the steel drill rod is 75°.

[0009] Preferably, the diameter of the steel drill rod is 12 - 15 cm to provide sufficient stiffness and strength while facilitating driving; the diameter of the steel pipe is 15 - 18 cm to form a protective layer outside the steel drill rod and reduce the driving resistance.

[0010] Preferably, a plurality of tooth cutters are evenly distributed along the radial direction at the head of the steel drill rod to increase the contact area between the steel drill rod and the block stones.

[0011] Preferably, the included angle between two adjacent tooth cutters in the radial direction is 60°; preferably, the top width of the tooth cutter is 5 mm and the height is 5 mm.

[0012] Preferably, the steel pipe is made of seamless steel pipe or spiral welded pipe to maintain sufficient straightness and stability during construction and avoid bending or deformation.

[0013] Preferably, the wall thickness of the steel pipe is 4 - 6 mm; preferably, a plurality of grooves are evenly distributed along the circumferential direction on the outer surface of the steel pipe to reduce the contact area between the steel pipe and the block stones; preferably, the included angle between two adjacent grooves in the circumferential direction is 30°, the depth of each groove is 0.5 mm, and the bottom width is 3 - 5 mm; preferably, the cross-sectional shape of the groove is rectangular, trapezoidal or semi-circular; preferably, the bottom end of the steel pipe is bent inward so that the bottom end of the steel pipe is conical to prevent stones from entering and reduce the driving resistance; preferably, the included angle between the low end of the steel pipe and the vertical direction is 30°, and the bending length is 1 cm.

[0014] A method for driving a drainage board using the above-mentioned hole-leading device includes the following steps:

[0015] 1) Driving the steel drill rod and the steel pipe through a hard shell layer including rockfill or soil fill;

[0016] 2) Disconnecting the steel pipe from the vibrating hammer;

[0017] 3) Lifting the vibrating hammer and pulling out the steel drill rod, and the steel pipe remains in the foundation;

[0018] 4) Driving a plastic drainage board from the center of the steel pipe;

[0019] 5) Pulling out the steel pipe.

[0020] Preferably, in step 1), the impact force of a high-frequency vibrating hammer is used to drive the steel drill rod and the steel pipe through the hard shell layer.

[0021] Optionally, fix the steel drill rod to the vibrating hammer, slip a steel pipe slightly larger in diameter than the steel drill rod over the steel drill rod, connect the vibrating hammer and the steel pipe through a switch support, connect the vibrating hammer to a device including an excavator or a crane and be driven by the device to vibrate and move up and down; utilize the high-frequency vibration of the vibrating hammer to drive the steel drill rod and the steel pipe through the surface stone-filled layer of the site, so that the head of the steel drill rod and the head of the steel pipe enter the soft soil layer, and at the same time, a section of the tail of the steel drill rod and the tail of the steel pipe protrude outside the surface stone-filled layer of the site; release the constraint between the vibrating hammer and the steel pipe, lift the vibrating hammer, pull out the steel drill rod, bury the steel pipe in the site, drive the drainage board into the soft soil layer through the holes of the steel pipe, and finally pull out the steel pipe, thereby realizing the driving of the drainage board in the surface stone-filled site.

[0022] Optionally, fix the steel drill rod to the vibrating hammer, slip a steel pipe slightly larger in diameter than the steel drill rod over the steel drill rod, connect the vibrating hammer and the steel pipe through a switch support, connect the vibrating hammer to a device including an excavator or a crane and be driven by the device to vibrate and move up and down; utilize the high-frequency vibration of the vibrating hammer to drive the steel drill rod and the steel pipe through the surface stone-filled layer of the site, so that the head of the steel drill rod and the head of the steel pipe enter the soft soil layer, and at the same time, a section of the tail of the steel drill rod and the tail of the steel pipe protrude outside the surface stone-filled layer of the site; release the constraint between the vibrating hammer and the steel pipe, lift the vibrating hammer, pull out the steel drill rod, and bury the steel pipe in the site; fill the holes of the steel pipe with sandy soil material, pull out the steel pipe and then drive the drainage board.

[0023] The hole-leading device and construction method for driving drainage boards in surface stone-filled sites provided by the present utility model have significant advantages and beneficial effects compared with the prior art, specifically including the following aspects:

[0024] 1) Solve the problem of driving drainage boards and expand the scope of application

[0025] Traditional drainage board driving equipment and techniques are mainly applicable to natural soft soil foundations or sites with plain fill on the surface. When encountering hard interlayers such as surface stone fill or crushed stones, it is very difficult for the drainage board to penetrate the hard crust layer, seriously affecting the driving effect and efficiency. The present utility model adopts a hole-leading device combining a steel drill rod and a steel pipe. By using the conical head of the steel drill rod to break the soil and squeeze the soil first and forming a hole under the protection of the steel pipe, it can effectively penetrate a hard surface layer of several meters or even thicker, creating conditions for subsequent driving of drainage boards. Therefore, the present utility model greatly expands the scope of application of drainage board driving, enabling it to adapt to more complex and variable stratum conditions;

[0026] 2) Improve the quality of driving drainage boards and ensure the drainage effect

[0027] Whether the drainage board can be vertically driven into the designed depth and closely fit with the soil mass is the key factor determining the drainage consolidation effect. By using the pilot hole device and construction method of the present utility model, with the leading guiding effect of the steel drill rod and the retaining and supporting effect of the steel pipe, the perpendicularity and stability of the hole formation can be ensured, providing a good driving channel for the drainage board. At the same time, prefabricating the hole is also conducive to the close contact between the drainage board and the soil mass, avoiding quality defects such as bending, breaking, and clogging of the drainage board during the driving process, thereby maximizing the drainage efficiency of the drainage board and ensuring the foundation consolidation quality;

[0028] 3) Significantly improve the construction efficiency and shorten the construction period

[0029] When driving drainage boards on a hard surface foundation, using conventional processes usually requires pre-drilling pilot holes and then manually inserting the drainage boards, resulting in very low construction efficiency and severely restricting the project progress. By using the pilot hole device and construction method of the present utility model, with the powerful impact force of the vibratory hammer, the guiding hole formation of the steel drill rod and steel pipe can be quickly completed; by using the quick connection and separation functions of the switch support, seamless switching between pulling out the steel drill rod and inserting the drainage board can be achieved, and the entire driving process realizes mechanized and automated operations, and the construction efficiency can be increased by several times or even dozens of times, greatly shortening the construction period;

[0030] 4) Save the driving cost and improve the economic benefits

[0031] The driving of drainage boards is an important process in soft foundation treatment and directly affects the cost of the entire project. By using the pilot hole device and construction method of the present utility model, through reasonable structural design and process optimization, the cost input of manpower, materials, equipment, etc. can be saved to the greatest extent. For example, the steel drill rod and steel pipe can be reused multiple times, significantly reducing material consumption; the switch support ensures the rapid turnover of the equipment and improves the utilization rate of machine hours; mechanized and automated operations reduce the on-site personnel configuration and save labor costs.

[0032] 5) Protect the environment and promote sustainable development

[0033] For the traditional construction of driving drainage boards on a hard surface, large-scale earth excavation and backfilling are often required, generating a large amount of waste soil and dust, which has an adverse impact on the environment. By using the pilot hole device and construction method of the present utility model, through the guiding hole formation of the steel drill rod and steel pipe, the earth excavation volume is minimized to the greatest extent, realizing environmentally friendly construction with low disturbance and less waste soil; at the same time, mechanized construction also reduces the generation of on-site dust and noise, improving the construction environment. Therefore, the popularization and application of the present utility model are conducive to realizing the coordinated development of project construction and the ecological environment and promoting the realization of sustainable development goals. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following drawings are provided for display:

[0035] Figure 1 It is a schematic cross-sectional structure diagram of an example of a hole-leading device for driving drainage plates in a surface rock-filled site of the present utility model.

[0036] Figure 2 It is a schematic diagram of the arrangement of the tooth knives on the steel drill bit of the hole-leading device of the present utility model.

[0037] Figure 3 It is a schematic diagram of the construction using the hole-leading device of the present utility model in a soft soil site Figure 1 .

[0038] Figure 4 It is a schematic diagram of the construction using the hole-leading device of the present utility model in a soft soil site Figure 2 .

[0039] Numerical markings in the figure: 1. Vibration hammer; 2. Steel pipe; 3. Steel drill; 4. Tooth knife; 5. Steel pipe bending plate.

[0040] It should be noted that the above-mentioned drawings only show some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other embodiment drawings can also be obtained based on these drawings. Detailed implementation manners

[0041] In order to make the purpose, technical solutions and beneficial effects of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0042] For the convenience of description, when necessary, spatial relative terms will be used, such as "below", "beneath", "under", "above", "on", etc., to describe the relationship of one element or feature shown in the drawings relative to another element or feature. The spatial relative terms are intended to include different orientations of the device during use or operation other than the orientation shown in the drawings. For example, if the device in the figure is flipped, the element described as "below" or "beneath" other elements or features will be oriented "above" other elements or features.

[0043] Unless otherwise defined, the terms used herein have the same meaning as those generally understood by those of ordinary skill in the art to which the present utility model belongs, and the terms should be understood to have a meaning consistent with the meaning in the context of the related art, and should not be understood in an idealized or overly formalized manner, except in the case where the present utility model is clearly defined.

[0044] A hole-drilling device for driving drainage plates in a surface rock-filled site, comprising a vibrating hammer, a steel pipe, and a steel drill rod; the steel pipe is connected to the vibrating hammer by a switch support, the steel pipe is sleeved outside the steel drill rod and extends from the head of the steel pipe, the tail of the steel drill rod is flush with the tail of the steel pipe, and the vibrating hammer is vertically connected to the tails of the steel pipe and the steel drill rod to apply vibration impact to them.

[0045] The switch support includes a support body fixed to the top of the steel pipe and a connecting member detachably connected to the support body. The connecting member is used to connect to the vibrating hammer, and a locking mechanism for quick locking or releasing is provided between the connecting member and the support body. The locking mechanism can be selected as bolt locking, buckle locking, or hydraulic locking, etc., which can realize the quick connection and disassembly of the steel pipe and the vibrating hammer and improve the construction efficiency.

[0046] The steel drill rod is made of high-strength and high-toughness alloy steel material. The head of the steel drill rod is conical, and the cone angle range can be 60° - 90°. For a rock-filled layer containing a large amount of stones and gravel, a larger cone angle can more effectively disperse stress when encountering large particles and reduce the risk of damage to the steel drill rod head; the cone angle of the head of the steel drill rod is 75°, which can achieve a better balance between penetration resistance and wear resistance, can effectively break and push away gravel particles, and will not overly increase the wear of the steel drill rod head.

[0047] The diameter of the steel drill rod is 12 - 15 cm, which can provide sufficient stiffness and strength, and at the same time, the diameter is not too large, facilitating driving; the diameter of the steel pipe is 15 - 18 cm, which can form a protective layer outside the steel drill rod and reduce the driving resistance.

[0048] A plurality of tooth cutters are evenly distributed along the axial direction on the head of the steel drill rod, and the included angle between adjacent two tooth cutters is 60°. By arranging evenly distributed tooth cutters on the head of the steel drill rod, the contact area between the steel drill rod and the block stones is increased, the crushing and cutting effects are enhanced, and the construction efficiency is improved; the top width of the tooth cutter is 5 mm and the height is 5 mm. In addition, it can also be optimized according to the size and strength of the block stones to adapt to different stratum conditions.

[0049] The steel pipe is made of seamless steel pipe or spiral welded pipe, and the wall thickness is 4 - 6 mm, ensuring that the steel casing maintains sufficient straightness and stability during construction to avoid bending or deformation.

[0050] A plurality of grooves are evenly distributed along the circumferential direction on the outer surface of the steel pipe; the circumferential included angle between adjacent two grooves is 30°, the depth of each groove is 0.5 mm, and the bottom width is 3 - 5 mm; the cross-sectional shape of the groove can be rectangular, trapezoidal or semi-circular; setting the grooves reduces the contact area between the steel pipe and the block stones, reduces the driving resistance, and improves the construction efficiency.

[0051] The bottom end of the steel pipe is bent inward by 30° (the angle with the vertical direction), and the bending length is 1 cm, so that the bottom end of the steel pipe is conical, which can not only effectively prevent stones and the like from entering, but also significantly reduce the driving resistance, taking into account the construction quality and efficiency.

[0052] A method for driving drainage boards using the above-mentioned hole-leading device includes the following steps:

[0053] 1) Drive the steel drill rod and the steel pipe through the hard shell layer including rockfill or fill soil;

[0054] 2) Disconnect the connection between the steel pipe and the vibrating hammer;

[0055] 3) Lift the vibrating hammer, pull out the steel drill rod, and leave the steel pipe in the foundation;

[0056] 4) Drive the plastic drainage board from the center of the steel pipe;

[0057] 5) Pull out the steel pipe.

[0058] In step 1), the impact force of the high-frequency vibrating hammer is used to drive the steel drill rod and the steel pipe through the hard shell layer.

[0059] Fix the steel drill rod to the vibrating hammer, sleeved a steel pipe with a diameter slightly larger than that of the steel drill rod on the steel drill rod, connect the vibrating hammer and the steel pipe through the switch support, and connect the vibrating hammer to a device including an excavator or a crane and be driven by the device to vibrate and move up and down; use the high-frequency vibration of the vibrating hammer to drive the steel drill rod and the steel pipe through the surface rockfill layer of the site, so that the head of the steel drill rod and the head of the steel pipe enter the soft soil layer, and at the same time, a section of the tail of the steel drill rod and the tail of the steel pipe protrudes outside the surface rockfill layer of the site; release the constraint between the vibrating hammer and the steel pipe, lift the vibrating hammer, pull out the steel drill rod, bury the steel pipe in the site, drive the drainage board through the hole of the steel pipe into the soft soil layer, and finally pull out the steel pipe, so as to realize driving the drainage board in the surface rockfill site; or, fill the hole of the steel pipe with sandy soil material, and drive the drainage board after pulling out the steel pipe.

[0060] As Figure 1 shown, a hole-leading device for driving drainage boards in a surface rockfill site includes a vibrating hammer 1, a steel pipe 2, and a steel drill rod 3; the steel pipe 2 and the vibrating hammer 1 are connected by a switch support, the steel pipe 2 is sleeved outside the steel drill rod 3, the head of the steel drill rod 3 is conical, and tooth cutters 4 are arranged on the upper part and extend out from the head of the steel pipe 2, the tail of the steel drill rod 3 is flush with the tail of the steel pipe 2, and the vibrating hammer 1 is vertically connected to the tails of the steel pipe 2 and the steel drill rod 3 to apply vibration impact to them.

[0061] In an embodiment, the diameter of the steel drill rod 3 is about 12 - 15 cm, and the diameter of the steel pipe 2 is about 15 cm - 18 cm.

[0062] Method for driving drainage plates using the hole-drilling device of the present utility model: Fix the steel drill rod 3 to the vibratory hammer 1, sleuth a steel pipe 2 with a diameter slightly larger than that of the steel drill rod 3 over the steel drill rod 3, connect the vibratory hammer 1 to the steel pipe 2, and connect the vibratory hammer 1 to equipment such as an excavator or a crane and be driven by the equipment to vibrate and move up and down; Utilize the high-frequency vibration of the vibratory hammer 1 to drive the steel drill rod 3 and the steel pipe 2 through the surface rockfill layer of the site, so that the head of the steel drill rod 3 and the head of the steel pipe 2 enter the soft soil layer, while a section of the tail of the steel drill rod 3 and the tail of the steel pipe 2 protrude outside the surface rockfill layer of the site; Release the constraint between the vibratory hammer 1 and the steel pipe 2, lift the vibratory hammer 1, and pull out the steel drill rod 3. The steel pipe 2 is buried in the site, and the drainage plate is driven into the soft soil layer through the hole of the steel pipe 2. Finally, the steel pipe 2 is pulled out, thereby realizing the driving of drainage plates in the surface rockfill site.

[0063] In another embodiment, sand materials can also be filled in the holes of the steel pipe 2. The sand materials can prevent the hole from collapsing and do not hinder the driving of the drainage plate. After the steel pipe is pulled out, the drainage plate is driven.

[0064] In summary, the hole-drilling device and construction method for driving drainage plates in the surface rockfill site provided by the present utility model, through innovative design concepts and optimized construction processes, give full play to the roles of key components such as steel drill rods, steel pipes, and switch supports, forming a set of comprehensive solutions that are technologically advanced, economically efficient, and environmentally friendly. Compared with the prior art, the present utility model can effectively solve the problem of difficult driving of drainage plates when filling the surface of soft soil foundations with rockfill or soil, improve the construction quality and efficiency, and reduce the construction cost at the same time.

[0065] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the present utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A hole-guiding device for constructing a drainage board in a surface rockfill site, characterized in that: It includes a vibrating hammer, a steel pipe, a steel chisel, a steel chisel tooth cutter, and a steel pipe bending plate; the steel pipe and the vibrating hammer are connected by a switch support, the steel pipe is sleeved outside the steel chisel and extends out from the head of the steel pipe, the tail of the steel chisel is flush with the tail of the steel pipe, and the vibrating hammer is vertically connected to the steel pipe and the tail of the steel chisel to apply vibration impact to them; the head of the steel chisel is conical; the outer surface of the steel pipe is evenly distributed with a plurality of grooves along the circumference to reduce the contact area between the steel pipe and the block stone.

2. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The switch support includes a support body fixed on the top of the steel pipe and a connecting piece detachably connected to the support body, the connecting piece is used to connect with the vibration hammer, and a locking mechanism for quick locking or release is provided between the connecting piece and the support body, and the locking mechanism is bolt locking, snap locking or hydraulic locking to achieve quick connection and disassembly of the steel pipe and the vibration hammer.

3. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The steel chisel is made of high-strength and high-toughness alloy steel material; the cone angle range of the cone is 60° to 90°.

4. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The cone angle of the head of the steel chisel is 75°.

5. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The diameter of the steel drill is 12-15 cm to provide sufficient rigidity and strength and facilitate driving; the diameter of the steel pipe is 15-18 cm to form a protective layer on the outside of the steel drill and reduce driving resistance.

6. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The steel drill head is evenly provided with a plurality of tooth cutters along the radial direction to increase the contact area between the steel drill and the stone.

7. The hole-guiding device for installing drainage board in surface rockfill site according to claim 6, characterized in that: The radial angle between two adjacent tooth cutters is 60°.

8. The hole-guiding device for installing drainage board in surface rockfill site according to claim 7, characterized in that: The toothed cutter has a top width of 5 mm and a height of 5 mm.

9. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The steel pipe is made of seamless steel pipe or spiral welded pipe, and maintains sufficient straightness and stability during the construction process to avoid bending or deformation.

10. The hole-guiding device for installing drainage board in surface rockfill site according to claim 9, characterized in that: The wall thickness of the steel pipe is 4-6 mm.

11. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The angle between two adjacent grooves along the circumferential direction is 30°, the depth of each groove is 0.5 mm, and the bottom width is 3 to 5 mm.

12. The hole-guiding device for installing drainage board in surface rockfill site according to claim 11, characterized in that: The cross-sectional shape of the groove is rectangular, trapezoidal or semicircular.

13. The hole-guiding device for installing drainage board in surface rockfill site according to claim 1, characterized in that: The bottom end of the steel pipe is bent inwardly so that the bottom end of the steel pipe is tapered to prevent stones from entering and reduce driving resistance.

14. The hole-guiding device for installing drainage board in surface rockfill site according to claim 13, characterized in that: The angle between the lower end of the steel pipe and the vertical direction is 30°, and the bending length is 1 cm.

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