Integrated grouting device for pile side and pile end of steel pipe pile

Abstract

The utility model discloses a steel pipe pile side pile end integrated mud jacking device which comprises a mud jacking straight pipe, a pile end mud jacking annular pipe, a plurality of pile side mud jacking annular pipes, a connector and a force transmission pipeline. The pile end mud jacking ring pipe and the multiple pile side mud jacking ring pipes are installed in the pile side of the steel pipe pile through corresponding annular supporting frames, the pile end mud jacking ring pipe and the multiple pile side mud jacking ring pipes are each provided with a plurality of mud jacking heads, and the pile end mud jacking ring pipe and the multiple pile side mud jacking ring pipes communicate with the mud jacking straight pipe through corresponding connectors. And the joint is provided with a control valve. Mud jacking pipes can be saved, installation efficiency is improved, safety risks are reduced, and permeation and diffusion of grout around the pile and in the soil body are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundations, and in particular to an integrated grouting device for a steel pipe pile side and pile end. Background Art

[0002] With the development of my country's economy, the number of projects such as cross-sea bridges, port terminals and offshore wind power is increasing. The application of steel pipe piles is increasing, the bearing capacity requirements are getting higher and higher, and the geological and hydrological and meteorological environment they face is becoming more and more complex. For example, in areas with deep and weak strata, in order to meet the high bearing capacity requirements, steel pipe piles often need to be sunk into the soil layer for tens of meters or even hundreds of meters, and the consumption of steel is very large. The safety and feasibility of pile sinking construction are also increasingly challenged. When steel pipe piles are at sea, they sometimes have to face the long-term action of complex coupling loads such as severe wind and waves and upper structure loads. The soil around the piles sometimes has lateral relaxation and deformation, resulting in a decrease in its effective stress, a weakening of the pile-soil effect, and a large loss of pile side friction resistance, which poses a high risk to the safe use of the upper structure. For example, when hard strata such as bedrock and dense sand and gravel are not buried deep and the overlying soil layer is shallow, it is difficult for steel pipe piles to be sunk into or pass through the hard strata through dynamic pile sinking equipment, resulting in an uncoordinated situation in which the compressive bearing capacity of steel pipe piles is very abundant, but the tensile bearing capacity is difficult to meet. The above situations have affected the application scope of steel pipe piles. Grouting technology on the sides and ends of steel pipe piles can improve the bearing capacity of steel pipe piles, improve the friction performance of the interface between steel pipe piles and the soil around the piles, and enhance the stiffness of the soil at the ends of steel pipe piles, which is helpful to stabilize the long-term bearing performance of steel pipe piles. A technology to solve the above problems has emerged.

[0003] However, the existing grouting technology has the following disadvantages: 1) The current post-grouting on the pile side mainly fixes the grouting pipe on the steel pipe pile, which is costly and has a limited grouting range. Multiple pile side grouting rings require multiple vertical grouting pipes to provide channels, which consumes too much material, has a large installation workload, and has extremely high safety risks during installation. 2) There is no active switch. After the steel pipe pile is sunk, pressure is generated at the pile end or around the pile when clear water is used for through-hole and subsequent grouting. If there is no active switch measure, it will cause series pressure on different grouting pipes, which will have an adverse effect on the penetration of pressure grouting into the pile-soil interface or soil layer, reducing the grouting effect. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the above existing technologies and provide an integrated grouting device for the pile side and pile end of a steel pipe pile. The integrated grouting device for the pile side and pile end of a steel pipe pile saves a lot of materials, is easy to install, reduces safety risks, and is also conducive to the penetration and diffusion of grout around the pile and in the soil.

[0005] Utility Model The purpose of the utility model is achieved through the following technical solutions: the integrated grouting device for the pile side and pile end of the steel pipe pile comprises a grouting straight pipe, a pile end grouting ring pipe, a plurality of pile side grouting ring pipes, a joint and a force transmission pipeline; the pile end grouting ring pipe and the plurality of pile side grouting ring pipes are installed in the pile side of the steel pipe pile through corresponding annular support frames, and the pile end grouting ring pipe and the plurality of pile side grouting ring pipes are provided with a plurality of grouting heads, the pile end grouting ring pipe and the plurality of pile side grouting ring pipes are connected with the grouting straight pipe through corresponding joints; the joint is provided with a control valve;

[0006] The control valve includes a mounting frame, a baffle, a connecting steel plate and a spring. The mounting frame is provided with a closed mounting cavity. The baffle, the connecting steel plate and the spring are all arranged in the mounting cavity. One end of the spring is fixed to the inner wall of the mounting cavity, and the other end of the spring is fixed to the connecting steel plate. The baffle is arranged on the joint and the other end is fixed to one side of the connecting steel plate. A connecting ring is provided on the other side of the connecting steel plate, and a roller is provided on the inner wall of the mounting cavity. The force transmission pipeline is connected to the connecting ring after being wrapped around a roller.

[0007] Preferably, each control valve has two springs, and the two springs are located on both sides of the force transmission pipeline.

[0008] Preferably, the mounting frame includes a bottom plate, four side plates and a top plate, the lower ends of the four side plates are fixed on the bottom plate, the upper ends of the four side plates are fixed to the top plate, and the four side plates are connected end to end in sequence, then the bottom plate, the four side plates and the top plate constitute a closed mounting cavity, and the roller is mounted on the side plate through a bracket.

[0009] Preferably, the power transmission pipeline includes a plurality of steel ropes and an outer tube sleeved on the steel ropes, and the rope ends of each steel rope are passed around corresponding rollers and then fixed to corresponding connecting rings.

[0010] Preferably, the pile end grouting ring tube has the same structure as the pile side grouting ring tube, and both include an annular tube with an inner passage, and the outer wall of the annular tube is provided with a connecting hole connected to the grouting head.

[0011] Preferably, the head of the grouting head of the grouting ring located at the pile end is arranged downward, and the head of the grouting head of the grouting ring located at the pile side extends out of the outer side of the steel pipe pile.

[0012] Preferably, the joint is L-shaped or arc-shaped.

[0013] Preferably, the inner diameters of the grouting straight pipe, the pile end grouting ring pipe and the pile side grouting ring pipe are all the same.

[0014] Preferably, the annular support bracket includes an annular supporting portion and an annular restraining portion, the lower end of the restraining portion is fixed to the supporting portion, the supporting portion, the restraining portion and the inner wall of the steel pipe pile form an installation groove matching the pile end grouting ring tube and the pile side grouting ring tube, the pile end grouting ring tube and the pile side grouting ring tube are placed in the corresponding installation grooves and then fixed by binding.

[0015] Preferably, a plurality of pile side grouting ring tubes are evenly distributed from bottom to top along the axis of the steel pipe pile.

[0016] The utility model has the following advantages over the prior art:

[0017] 1. The integrated grouting device for the pile side and pile end of the steel pipe pile of the utility model mainly consists of a grouting straight pipe, a pile end grouting ring pipe, multiple pile side grouting ring pipes, an L-shaped joint and a force transmission pipeline. It adopts a unique control valve structure to effectively control the connection or closing between the grouting straight pipe and the grouting ring pipe. The pipeline can be closed after grouting to ensure that the pressure around the pile is maintained for a certain period of time after grouting, which is conducive to the penetration and diffusion of slurry around the pile and in the soil. In addition, it can ensure that there is no slurry mixing between layers during multi-layer grouting. It can be used for active enhancement of the pile-soil interface of steel pipe piles by grouting in various environments. After the grouting is completed, the grouting channel can be cleaned and the switch can be actively closed, and grouting can be performed again when the pile-soil bearing capacity decreases in the future.

[0018] 2. The installation process of the utility model equipment is safe and reliable, with high operating efficiency, low material cost, good grouting effect and wide application. When the device is used for grouting, the active opening and closing of the grouting ring pipes of each layer can be effectively guaranteed during grouting. After the grouting is completed, the control valve can be closed to facilitate the penetration of the grout under pressure.

[0019] 3. The integrated grouting device for the pile side and pile end of the steel pipe pile of the utility model is mainly composed of a grouting straight pipe, a pile end grouting ring pipe, multiple pile side grouting ring pipes, an L-shaped joint and a force transmission pipeline to form a series-connected integrated grouting device. This structure reduces multiple grouting straight pipes to one, saves a lot of materials, is easy to install, and reduces safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the integrated grouting device for the side and end of a steel pipe pile of the utility model.

[0021] Figure 2 It is an internal schematic diagram of the integrated grouting device for the side and end of a steel pipe pile of the utility model.

[0022] Figure 3 It is a schematic diagram of the control valve of the utility model.

[0023] Figure 4 It is a top view of the integrated grouting device for the side and end of a steel pipe pile of the utility model.

[0024] Figure 5 It is a schematic diagram of the steel pipe pile side and pile end integrated grouting device of the utility model when the steel pipe pile is omitted.

[0025] Figure 6 yes Figure 5 A magnified schematic diagram of center A.

[0026] Among them, 1 is a grouting straight pipe, 2 is a grouting ring pipe at the pile end, 3 is a grouting ring pipe at the pile side, 4 is an L-shaped joint, 5 is a power transmission pipeline, 6 is an annular support frame, 7 is a steel pipe pile, 8 is a grouting head, 9 is a control valve, 10 is a mounting frame, 11 is a baffle, 12 is a connecting steel plate, 13 is a spring, 14 is a connecting ring, 15 is a roller, 16 is a steel wire rope, 17 is an outer pipe, 18 is a supporting part, 19 is a supporting part, 20 is a bottom plate, 21 is a side plate, and 22 is a top plate. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figures 1 to 4 The steel pipe pile side and pile end integrated grouting device shown comprises a grouting straight pipe, a pile end grouting ring pipe, a plurality of pile side grouting ring pipes, a joint and a force transmission pipeline; the pile end grouting ring pipe and the plurality of pile side grouting ring pipes are installed in the steel pipe pile side through corresponding annular support frames, and the pile end grouting ring pipe and the plurality of pile side grouting ring pipes are provided with a plurality of grouting heads, and the pile end grouting ring pipe and the plurality of pile side grouting ring pipes are connected with the grouting straight pipe through corresponding joints; the joint is provided with a control valve;

[0029] The control valve includes a mounting frame, a baffle, a connecting steel plate and a spring. The mounting frame is provided with a closed mounting cavity. The baffle, the connecting steel plate and the spring are all arranged in the mounting cavity. One end of the spring is fixed to the inner wall of the mounting cavity, and the other end of the spring is fixed to the connecting steel plate. The baffle is arranged on the joint and the other end is fixed to one side of the connecting steel plate. A connecting ring is provided on the other side of the connecting steel plate, and a roller is provided on the inner wall of the mounting cavity. The force transmission pipeline is connected to the connecting ring after being wrapped around a roller.

[0030] Specifically, the joint in this embodiment adopts an L-shaped joint to facilitate construction, ensure the connection between the grouting straight pipe and the grouting ring pipe (i.e., the pile end grouting ring pipe and the pile side grouting ring pipe), and ensure that the slurry in the grouting straight pipe can flow smoothly into each grouting ring pipe. In the initial state, the baffle is under the action of the restoring force of the spring, and the baffle is located in the L-shaped joint to close the inner channel of the L-shaped joint, that is, the grouting straight pipe and each grouting ring pipe are not connected. When grouting and grouting are to be performed, a steel wire rope in the power transmission pipeline is pulled upward at a certain speed, and the baffle of the control valve corresponding to this steel wire rope is pulled out of the L-shaped joint, so that the corresponding pile side grouting ring pipe or pile end grouting ring pipe is connected with the grouting straight pipe, thereby realizing that the pile end grouting ring pipe and the pile side grouting ring pipe complete the grouting and grouting work.

[0031] When the inner channel of the L-shaped joint needs to be closed again, it is only necessary to loosen the force transmission pipeline. At this time, the baffle is pushed into the L-shaped joint again under the restoring force of the spring. This operation is convenient, and the pipeline can be closed after grouting to ensure that the pressure around the pile is maintained for a certain period of time after grouting, which is conducive to the penetration and diffusion of slurry around the pile and in the soil. In addition, it can ensure that the slurry of each layer does not cross when grouting multiple layers, and can be used for active reinforcement of the pile-soil interface of the grouting method of steel pipe piles in various environments.

[0032] During construction, first pull a steel wire rope in the force transmission pipeline to open the control valve corresponding to the pile end grouting ring pipe to carry out grouting and grouting work, then pull other steel wire ropes to open the control valves of the pile side ring pipe from bottom to top in turn to complete grouting and grouting work one by one. Each control valve is connected in series to a grouting straight pipe to achieve a series connection structure, so that multiple grouting straight pipes are reduced to one, saving a lot of materials, convenient installation, and reducing risks. At the same time, each control valve is individually controlled through the force transmission pipeline. When grouting the pile end, the force transmission pipeline pulls the steel wire to open the control valve at the pile end grouting ring pipe, and the control valves at other pile side grouting ring pipes are closed. After grouting is completed, the force transmission pipeline releases the steel wire, and the control valve pushes the baffle to stop grouting, and grouting at other elevations is carried out in turn. After closing the control valve each time, it can be ensured that the pressure is not in series with other elevations, which is conducive to ensuring that the slurry spreads along the pile side. There are two springs in each control valve, and these two springs are located on both sides of the force transmission pipeline. This structure can ensure the stable movement of the spoiler and effectively control the opening and closing of the L-shaped joint.

[0033] The mounting frame includes a bottom plate, four side plates and a top plate. The lower ends of the four side plates are fixed on the bottom plate, and the upper ends of the four side plates are fixed on the top plate. The four side plates are connected end to end in sequence, so the bottom plate, the four side plates and the top plate form a closed mounting cavity, and the roller is installed on the side plate through a bracket. Specifically, during construction, one end of the L-shaped joint passes through the top plate and the bottom plate in sequence and then communicates with the corresponding grouting ring pipe (i.e., the pile end grouting ring pipe and the pile side grouting ring pipe), while the outer tube of the power transmission pipeline is fixed to the top plate, and the wire rope passes through the top plate through the outer tube and then bypasses the roller and is connected to the connecting ring. The mounting frame using this relatively closed structure can protect other components of the control valve in the mounting cavity to ensure the working performance of the roller, the spoiler, etc., that is, to prevent gravel and the like from affecting the work of the roller and the spoiler.

[0034] The power transmission pipeline includes multiple steel wire ropes and outer tubes sleeved on the steel wire ropes, and the rope ends of each steel wire rope are fixed to the corresponding connecting ring after passing through the roller of the corresponding control valve. This setting uses the steel wire rope to control the action of each control valve separately, avoiding the mutual influence of the pile end grouting ring pipe and each pile side grouting ring pipe.

[0035] The pile end grouting ring pipe and the pile side grouting ring pipe have the same structure, both of which include an annular pipe with an inner channel, and the outer wall of the annular pipe is provided with a connecting hole connected to the grouting head. That is, the pile end grouting ring pipe and the pile side grouting ring pipe have the same structure, but they are installed at different positions of the steel pipe pile and the grouting heads arranged in the two are placed differently. The head of the grouting head of the pile end grouting ring pipe is set downward, and the head of the grouting head of the pile side grouting ring pipe extends out of the outside of the steel pipe pile. That is, the grouting head of the pile side grouting ring pipe extends out of the outside of the steel pipe pile, pressing the pressurized cement slurry into the soil layer on the side of the pile; the head of the grouting head of the pile end grouting ring pipe is downward, pressing the pressurized cement slurry into the soil layer at the pile end, thereby increasing the ultimate bearing capacity of the steel pipe pile and reducing the settlement of the pile.

[0036] The inner diameters of the grouting straight pipe, the pile end grouting ring pipe and the pile side grouting ring pipe are all the same. This structure ensures the smooth flow of slurry in the grouting straight pipe, the pile end grouting ring pipe and the pile side grouting ring pipe, and can also reduce the occurrence of blockage.

[0037] like Figure 5 and Figure 6 As shown, the annular support bracket includes an annular support portion and an annular constraint portion, the lower end of the constraint portion is fixed to the support portion, the support portion, the constraint portion and the inner wall of the steel pipe pile form an installation groove matching the pile end grouting ring pipe and the pile side grouting ring pipe, the pile end grouting ring pipe and the pile side grouting ring pipe are placed in the corresponding installation groove and then fixed by binding. This installation structure is simple, ensuring the stability of each grouting ring pipe, so as to ensure that each grouting ring pipe has good working performance.

[0038] A plurality of pile side grouting ring pipes are evenly distributed from bottom to top along the axis of the steel pipe pile.

[0039] The construction method of the integrated grouting device for the pile side and pile end of the steel pipe pile adopts the above-mentioned integrated grouting device for the pile side and pile end of the steel pipe pile, comprising the following steps:

[0040] S1. Design a reasonable annular support bracket and pile side grouting ring pipe according to the diameter of the steel pipe pile to be grouted;

[0041] S2. Install a suitable number of grouting heads on the pile end grouting ring and the pile side grouting ring, with the grouting heads on the pile end grouting ring facing downward and the grouting heads on the pile side grouting ring extending out of the steel pipe pile;

[0042] S3. Install the pile end grouting ring pipe and the pile side grouting ring pipe in the installation groove formed by the ring surface support bracket and the inner wall of the steel pipe pile, and fix them by binding; then install the L-shaped joint and the control valve, connect the power transmission pipeline with the control valve, and reserve a sufficient length of the power transmission pipeline;

[0043] S4. Before sinking the steel pipe pile, fix the grouting straight pipe on the outside of the pile body, and gradually extend the force transmission pipeline upward. The grouting straight pipe and the force transmission pipeline extend a certain length from the top of the pile. After good protection, sink the steel pipe pile.

[0044] S5. After the steel pipe pile is sunk to the specified depth, grouting and grouting are carried out within the specified time. The control valves are opened in sequence from bottom to top through the force transmission pipeline, so that the grouting ring pipe at the pile end completes the grouting and grouting work first, and the grouting ring pipes on each pile side complete the grouting and grouting work in sequence from bottom to top.

[0045] In summary, the utility model proposes an integrated grouting device for the pile side and pile end of a steel pipe pile, which can save grouting pipes, improve installation efficiency, and reduce safety risks. It can also close the pipeline after grouting to ensure that the pressure around the pile is maintained for a certain time after grouting, which is conducive to the penetration and diffusion of slurry around the pile and in the soil. In addition, it can ensure that there is no direct grouting of each layer during multi-layer grouting. It can be used for active enhancement of the pile-soil interface of steel pipe piles by grouting in various environments. The method is simple, safe, time-saving, economical, and environmentally friendly.

[0046] The above-mentioned specific implementation modes are preferred embodiments of the present invention and cannot be used to limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. An integrated grouting device for the side and end of a steel pipe pile, characterized in that: It includes a grouting straight pipe, a pile end grouting ring pipe, multiple pile side grouting ring pipes, joints and force transmission pipelines; the pile end grouting ring pipe and multiple pile side grouting ring pipes are installed in the side of the steel pipe pile through corresponding annular support frames, and the pile end grouting ring pipe and multiple pile side grouting ring pipes are connected to the grouting straight pipe through corresponding joints, and the joints are provided with control valves; The control valve includes a mounting frame, a baffle, a connecting steel plate and a spring. The mounting frame is provided with a closed mounting cavity. The baffle, the connecting steel plate and the spring are all arranged in the mounting cavity. One end of the spring is fixed to the inner wall of the mounting cavity, and the other end of the spring is fixed to the connecting steel plate. The baffle is arranged on the joint and the other end is fixed to one side of the connecting steel plate. A connecting ring is provided on the other side of the connecting steel plate, and a roller is provided on the inner wall of the mounting cavity. The force transmission pipeline is connected to the connecting ring after being wrapped around a roller.

2. The integrated grouting device for the side and end of a steel pipe pile according to claim 1 is characterized in that: There are two springs in each control valve, and these two springs are located on both sides of the force transmission pipeline.

3. The integrated grouting device for the side and end of a steel pipe pile according to claim 1 is characterized in that: The mounting frame includes a bottom plate, four side plates and a top plate, the lower ends of the four side plates are fixed on the bottom plate, the upper ends of the four side plates are fixed on the top plate, and the four side plates are connected end to end in sequence, so that the bottom plate, the four side plates and the top plate form a closed mounting cavity.

4. The integrated grouting device for the side and end of a steel pipe pile according to claim 1 is characterized in that: The power transmission pipeline comprises a plurality of steel wire ropes and an outer tube sleeved on the steel wire ropes, and the rope ends of the steel wire ropes are passed around corresponding rollers and then fixed on corresponding connecting rings.

5. The integrated grouting device for the side and end of a steel pipe pile according to claim 1 is characterized in that: The pile end grouting ring pipe has the same structure as the pile side grouting ring pipe, and both comprise an annular pipe with an inner passage, and the outer wall of the annular pipe is provided with a connecting hole connected to the grouting head.

6. The integrated grouting device for the side and end of a steel pipe pile according to claim 1, characterized in that: The pile end grouting ring and multiple pile side grouting rings are all provided with a plurality of grouting heads. The heads of the grouting heads located at the pile end grouting ring are arranged downward, and the heads of the grouting heads located at the pile side grouting rings extend out of the outside of the steel pipe pile.

7. The integrated grouting device for the side and end of a steel pipe pile according to claim 1 is characterized in that: The joint is L-shaped or arc-shaped.

8. The integrated grouting device for the side and end of a steel pipe pile according to claim 1, characterized in that: The inner diameters of the grouting straight pipe, the pile end grouting ring pipe and the pile side grouting ring pipe are all the same.

9. The integrated grouting device for the side and end of a steel pipe pile according to claim 1, characterized in that: The annular support bracket includes an annular supporting portion and an annular restraining portion, the lower end of the restraining portion is fixed to the supporting portion, the supporting portion, the restraining portion and the inner wall of the steel pipe pile form an installation groove matching the pile end grouting ring tube and the pile side grouting ring tube, the pile end grouting ring tube and the pile side grouting ring tube are placed in the corresponding installation grooves and then fixed by binding.

10. The integrated grouting device for the side and end of a steel pipe pile according to claim 1, characterized in that: A plurality of pile side grouting ring pipes are evenly distributed from bottom to top along the axis of the steel pipe pile.

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