Novel thread expanding body steel pile side grouting equipment

Abstract

The utility model relates to novel thread expansion body steel pile side grouting equipment which comprises a steel pipe and a pile end grouting steel pipe and further comprises a grouting mechanism, the grouting mechanism comprises a grouting hole, a three-way grouting steel pipe and a pile side grouting steel pipe, the grouting hole is formed in a flange plate of the steel pipe, the three-way grouting steel pipe is arranged in the grouting hole, and the pile side grouting steel pipe is arranged in the three-way grouting steel pipe. And the three-way grouting steel pipe is communicated with the pile side grouting steel pipe through a check valve. The steel disc is installed between the flange plates, the grouting holes are formed in the two sides of the steel disc, the three-way grouting steel pipe is installed in the steel disc, and the three-way grouting steel pipe is connected with the pile side grouting steel pipe, so that grouting operation can be achieved, direct hole forming in a pile body is avoided, cost is reduced, and installation is convenient; and the grouting reinforcement requirement can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of side grouting of steel piles, in particular to a side grouting device for a new type of screw-expanded steel pile. Background Technique

[0002] The screw-expanded steel pile is a commonly used underground engineering structure. The screw-expanded steel pile is usually made of coiled steel pipes and is provided with spiral blades at the front end. Therefore, during the construction process, the pile tip bearing layer and the soil around the pile will be disturbed. Therefore, it is necessary to fill and reinforce the soil layer disturbed by the screw blades to improve the side friction resistance of the screw section of the pile. The common methods of grouting technology in building civil engineering construction are: static pressure grouting method, high-pressure jet grouting method, etc. The construction technology and principle of the above grouting methods are as follows:

[0003] The static pressure grouting method is generally used in projects with relatively soft foundation soils. The application of this type of grouting technology is relatively common. It mainly combines the principles of air pressure, electrochemistry, and hydraulics. By using a grouting pipe and pressurization, the grout is gradually and evenly injected into the corresponding gaps or formations. Under the action of gravity and pressure, the grout seeps into and fills the voids, and then after a certain curing time, the reinforcement effect is achieved. Generally speaking, the grouting slurry has a large self-weight, and with the action of pressure, the slurry will continuously fill and extend in the soft foundation, and finally form a coagulated body. In actual construction, due to the influence of grouting pressure and external environmental temperature, when choosing to use this method, it is also necessary to fully consider the actual situation of civil engineering;

[0004] The high-pressure jet grouting method is also a representative grouting technology method, which is often used in some soft foundations and water conservancy projects. The principle of the high-pressure jet grouting method is to first determine the position of the grouting hole, then fix the grouting pipe to the specified position, and finally grout by means of high-pressure jetting. The grouting pipe in this way will form a high-strength jet flow, which will cause a certain degree of damage to the original soil structure at the grouting position. Therefore, the characteristic of the high-pressure jet grouting method is that the slurry forms great destructive power under high pressure, converting the soil layer structure into soil particles to facilitate the inflow of the slurry. After the soil particles and the slurry are evenly mixed, they can solidify. After thorough solidification, the stability of the soil layer structure is greatly improved, realizing reinforcement. When applying the high-pressure jet grouting method in soft foundations, because the destructive power of the technology itself is equivalent to dispersing and reorganizing the soft foundation structure and then reinforcing it, the nature of the original foundation is changed, making it have supporting ability. The high-pressure jet grouting method can also adjust the injection volume, injection speed, injection direction, etc. according to needs. Therefore, it can also achieve reinforcement without damaging the original structure. Generally speaking, compared with other methods, the high-pressure jet grouting method has a wider application range and can also play a better role in many complex environments, with high application value, while the static pressure grouting method is basically only suitable for soft foundation environments;

[0005] The above two methods have the following shortcomings: Since the front section of the threaded enlarged steel pile has spiral blades, the rear end soil will be disturbed during pile sinking construction, and grouting reinforcement is required. The traditional method is to reserve grouting holes on both sides of the middle of the pile body to facilitate pile side grouting. The current commonly used method in construction is to directly drill holes on the pile body. Although this method is relatively simple, it requires a large cost, destroys the integrity of the pile body, and reduces the cross-sectional stiffness of the screw section. Therefore, in response to the above problems, a new type of threaded enlarged steel pile side grouting equipment is proposed. Utility Model Content

[0006] The utility model aims to provide a novel side grouting device for a threaded enlarged steel pile to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides a novel threaded enlarged steel pile side grouting equipment, including a steel pipe, a pile end grouting steel pipe, and a grouting mechanism. The grouting mechanism includes a grouting hole, a three-way grouting steel pipe, and a pile side grouting steel pipe. The grouting hole is arranged at the flange, the three-way grouting steel pipe is arranged in the grouting hole, and the three-way grouting steel pipe is connected with the pile side grouting steel pipe through a check valve.

[0008] Furthermore, the flange is provided with a notch which is staggered with the bolt holes and passes through the center of the circle, the grouting hole is located at the notch, the three-way grouting steel pipe is fixedly arranged inside the flange, and the discharge end of the three-way grouting steel pipe extends to the grouting hole at the notch groove, the pile side grouting steel pipe is located in the center of the steel pipe, and the pile end grouting steel pipe is located on one side of the pile side grouting steel pipe.

[0009] Furthermore, a steel disc is fixedly arranged between the flanges, a grouting hole is reserved on the steel disc, a three-way grouting steel pipe is arranged in the steel disc, a feed end of the three-way grouting steel pipe is connected with the pile side grouting steel pipe, and a discharge end is connected with the grouting hole.

[0010] Furthermore, the steel disc is arranged in a disc shape, and the upper and lower end surfaces of the steel disc are tightly fitted with the flange disc, and a pile end grouting steel pipe is arranged at the center of the steel disc.

[0011] Furthermore, evenly distributed fixing screws are installed on the outer side of the flange.

[0012] Furthermore, the fixing screws are arranged in multiple groups, and the fixing screws are arranged on the periphery of the flange in a circular trajectory.

[0013] Furthermore, the pile end grouting steel pipe is vertically arranged inside the steel pipe, and the bottom of the pile end grouting steel pipe is connected to a grouting device.

[0014] Furthermore, the grouting device is arranged at an angle, and the outer side of the grouting device is fixedly connected to the steel pipe.

[0015] Furthermore, an internal thread is provided inside the inlet end of the tee grouting steel pipe, and the tee grouting steel pipe is screwed to the pile side grouting steel pipe through the internal thread.

[0016] Furthermore, evenly distributed spiral blades are installed on the outer side of the steel pipe, and a pile tip is provided at the bottom of the steel pipe.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The present utility model proposes that a steel disc is installed between the flange plates, and grouting holes are provided on both sides of the steel disc. The tee grouting steel pipe is installed therein, and the upper part of the tee grouting steel pipe is connected to the pile side grouting steel pipe, so that the grouting operation can be realized. This method not only avoids directly opening holes on the pile body, reduces costs, and is convenient for installation, but also can meet the requirements of grouting reinforcement;

[0019] At the same time, a check valve is installed at the tee grouting steel pipe, which can effectively avoid the backflow of the grout water, achieve the purpose of unidirectional flow of the grout water, and ensure the grouting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is for the present utility model Figure 1 schematic diagram of the structure at A;

[0022] Figure 3 is a schematic diagram of the installation structure of the steel disc of the present utility model;

[0023] Figure 4 is a schematic diagram of the structure of the tee grouting steel pipe of the present utility model;

[0024] Figure 5 is a cross-sectional schematic diagram of the steel disc of the present utility model;

[0025] Figure 6 is a schematic diagram of the structure in which one of the grouting holes of the present utility model is provided on the flange plate;

[0026] Figure 7 is a cross-sectional schematic diagram of the structure in which one of the grouting holes of the present utility model is provided on the flange plate;

[0027] Figure 8 is a schematic diagram of another structure with a notch provided on the flange plate of the present utility model;

[0028] Figure 9 is a cross-sectional schematic diagram of another structure with a notch provided on the flange plate of the present utility model.

[0029] In the figure: 1. Steel pipe; 2. Steel pipe with end grouting; 3. Steel pipe with side grouting; 4. Flange; 5. Steel disc; 6. Fixing screw; 7. Three-way grouting steel pipe; 8. Spiral blade; 9. Grouting device; 10. Pile tip; 11. Check valve; 12. Notch. Specific implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1

[0032] Please refer to Figures 1 to 5 , a novel side grouting device for a steel pile with a threaded enlarged body, including a steel pipe 1 and a steel pipe 2 with end grouting, and further including a grouting mechanism. The grouting mechanism includes a grouting hole, a three-way grouting steel pipe 7, and a steel pipe 3 with side grouting. The grouting hole is arranged at the flange 4 of the steel pipe 1. The three-way grouting steel pipe 7 is arranged in the grouting hole. The three-way grouting steel pipe 7 is connected to the steel pipe 3 with side grouting through a check valve 11. Installing the check valve 11 can effectively prevent the slurry from flowing back during grouting, achieve the purpose of unidirectional flow of the slurry and water, and ensure the grouting quality. The inner side of the vertical part (i.e., the feed port end) of the three-way grouting steel pipe 7 is provided with internal threads. The three-way grouting steel pipe 7 is connected to the steel pipe 3 with side grouting through the internal threads. The connection work is carried out by rotating the steel pipe 3 with side grouting. After grouting is completed, the steel pipe 3 with side grouting can be removed and recycled, realizing recycling.

[0033] A steel disc 5 is fixedly arranged between the flanges 4. The three-way grouting steel pipe 7 is arranged in the steel disc 5, and the upper end of the three-way grouting steel pipe 7 is connected to the steel pipe 3 with side grouting.

[0034] The steel disc 5 is arranged in a disc shape, and the upper and lower end faces of the steel disc 5 are closely attached to the flange 4. The steel pipe 2 with end grouting is arranged at the center of the steel disc 5.

[0035] Fixing screws 6 are installed on the outer side of the flange 4.

[0036] The fixing screws 6 are arranged in multiple groups, and the fixing screws 6 are arranged in a circular track around the flange 4.

[0037] The steel pipe 2 with end grouting is vertically arranged inside the steel pipe 1, and a grouting device 9 is connected to the bottom of the steel pipe 2 with end grouting.

[0038] The grouting device 9 is arranged obliquely, and the outer side of the grouting device 9 is fixedly connected to the steel pipe 1.

[0039] Evenly distributed spiral blades 8 are installed on the outside of the steel pipe 1 , and a pile tip 10 is provided at the bottom of the steel pipe 1 .

[0040] The workflow is as follows:

[0041] (1) According to the geological survey report and the actual situation of the proposed site, the parameters of the threaded enlarged steel pile are designed and determined. After the production is completed, the threaded enlarged steel pile is brought to the site for acceptance;

[0042] (2) After measurement and layout, the excavator and the fully automatic hydraulic screwdriver are used to lift the threaded expanded steel pile to the designed pile position.

[0043] (3) Composite pile position.

[0044] (4) Use the long arm of the fully automatic hydraulic screwing machine to calibrate the angle of the threaded enlarged steel pile. At the same time, the surveying engineer uses the theodolite to fine-tune and confirm the inclination angle.

[0045] (5) During the drilling construction of the first section of the threaded enlarged steel pile, the surveyor promptly re-measured the angle and pile position of the steel pile. Once an error occurred, the angle and pile position were corrected in a timely manner.

[0046] (6) During normal drilling, the screwdriver automatically adjusts the parameters according to different formation parameters. At the same time, the driver adjusts the drilling speed in time according to the actual drilling situation.

[0047] (7) Lift the second section of threaded enlarged steel piles and carry out the pile connection and grouting steel pipe connection processes.

[0048] (8) The second section of the threaded enlarged steel pile is screwed in and drilled to the designed elevation.

[0049] (9) Final drilling inspection: The surveying engineer issues a termination instruction based on the designed elevation and inclination angle.

[0050] (10) Pull out the pin and the screwing machine starts the construction of the next screw threaded steel pipe pile.

[0051] (11) Start grouting and stop when the grouting height is reached, and unscrew and remove the upper section of the grouting steel pipe.

[0052] (12) Construction personnel remove the matching flange pin joint accessories and install them on the subsequent threaded expansion steel pile flange joint to prepare for subsequent construction.

[0053] Since the front section of the screw-expanded steel pile is equipped with spiral blades, soil disturbance will occur at the rear end during pile driving construction, and grouting reinforcement is required. The traditional method is to reserve grouting holes on both sides of the middle part of the pile body to facilitate side grouting of the pile. The commonly used method in current construction is to directly drill holes on the pile body. Although this method is relatively simple, it requires a large cost, damages the integrity of the pile body, and reduces the cross-sectional stiffness of the screw section. In this invention, a steel disc 5 is installed between the flanges 4, and grouting holes are opened on both sides of the steel disc 5. The three-way grouting steel pipe 7 is installed therein, and the upper part of the three-way grouting steel pipe 7 is connected to the side grouting steel pipe 3 of the pile, thus forming a grouting system. This method not only avoids directly drilling holes on the pile body, reduces costs, and is convenient for installation, but also meets the requirements of grouting reinforcement;

[0054] In this embodiment, the three-way grouting steel pipe 7 can be fixed by conventional methods such as welding and mechanical connection. For example, when the reserved grouting holes are arranged on both sides of the steel disc 5, the three-way grouting steel pipe 7 can be welded and fixed at the inlet and outlet of the reserved holes of the steel disc 5;

[0055] Grouting work is carried out through both sides of the three-way grouting steel pipe 7 to further fill and reinforce the soil layer disturbed by the spiral blades, improve the side friction resistance of the screw section of the pile, and enhance the bearing capacity of the pile body.

[0056] Embodiment 2

[0057] As Figure 6 、 7 shown, as a simplified structural solution of Embodiment 1, the grouting holes are arranged on the flange 4 and staggered from the bolt holes. The feeding end of the three-way grouting steel pipe 7 is communicated with the side grouting steel pipe 3 of the pile, and the discharging end is fixed in the grouting holes.

[0058] Embodiment 3

[0059] As Figure 8 、 9 shown, as another simplified structural solution of Embodiment 1, the flange 4 is provided with a notch 12 that is staggered from the bolt holes and penetrates the center of the circle. The grouting holes are located at the notch 12. The three-way grouting steel pipe 7 is fixedly arranged inside the flange 4, and the discharging end of the three-way grouting steel pipe 7 extends to the grouting holes at the notch 12. The side grouting steel pipe 3 of the pile is located at the center of the steel pipe 1, and the end grouting steel pipe 2 of the pile is located on one side of the side grouting steel pipe 3 of the pile.

[0060] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of pile side grouting equipment for a threaded enlarged steel pile, comprising a steel pipe (1) and a pile end grouting steel pipe (2), characterized in that: It also includes a grouting mechanism, which includes a grouting hole, a three-way grouting steel pipe (7), and a pile-side grouting steel pipe (3). The grouting hole is arranged at the flange (4) of the steel pipe (1), the three-way grouting steel pipe (7) is arranged in the grouting hole, and the three-way grouting steel pipe (7) is connected to the pile-side grouting steel pipe (3) through a check valve (11).

2. The new type of thread enlarged steel pile side grouting equipment according to claim 1 is characterized by: The flange (4) is provided with a notch (12) which is staggered from the bolt holes and passes through the center of the circle, the grouting hole is located at the notch (12), the three-way grouting steel pipe (7) is fixedly arranged inside the flange (4), and the discharge end of the three-way grouting steel pipe (7) extends to the grouting hole of the notch (12), the pile side grouting steel pipe (3) is located at the center of the steel pipe (1), and the pile end grouting steel pipe (2) is located on one side of the pile side grouting steel pipe (3).

3. The new type of thread enlarged steel pile side grouting equipment according to claim 1 is characterized by: A steel disc (5) is fixedly arranged between the flanges (4), a grouting hole is reserved on the steel disc (5), a three-way grouting steel pipe (7) is arranged in the steel disc (5), the feed end of the three-way grouting steel pipe (7) is connected to the pile side grouting steel pipe (3), and the discharge end is connected to the grouting hole.

4. The new type of thread enlarged steel pile side grouting equipment according to claim 3 is characterized by: The steel disc (5) is arranged in a disc shape, and the upper and lower end surfaces of the steel disc (5) are tightly fitted with the flange (4), and a pile end grouting steel pipe (2) is arranged at the center of the steel disc (5).

5. The new type of thread enlarged steel pile side grouting equipment according to claim 1 is characterized by: Fixing screws (6) are installed on the outer side of the flange (4).

6. The new type of thread enlarged steel pile side grouting equipment according to claim 5 is characterized by: The fixing screws (6) are arranged in multiple groups, and the fixing screws (6) are arranged in a circular trajectory on the periphery of the flange (4).

7. The new type of thread enlarged steel pile side grouting equipment according to claim 1 is characterized by: The pile end grouting steel pipe (2) is vertically arranged inside the steel pipe (1), and the bottom of the pile end grouting steel pipe (2) is connected to a grouting device (9).

8. The new type of thread enlarged steel pile side grouting equipment according to claim 7 is characterized by: The grouting device (9) is arranged obliquely, and the outer side of the grouting device (9) is fixedly connected to the steel pipe (1).

9. The new type of thread enlarged steel pile side grouting equipment according to claim 1 is characterized by: The inner side of the feed port end of the three-way grouting steel pipe (7) is provided with an internal thread, and the three-way grouting steel pipe (7) is screwed to the pile side grouting steel pipe (3) via the internal thread.

10. The new type of pile side grouting equipment according to any one of claims 1 to 9, characterized in that: The outer side of the steel pipe (1) is provided with evenly distributed spiral blades (8), and the bottom of the steel pipe (1) is provided with a pile tip (10).

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