Treatment device for end bearing pile sediment

Abstract

The utility model discloses an end bearing pile sediment treatment device, which belongs to the technical field of underground structures and comprises an end bearing pile structure, a high-pressure pump, a rotation increasing nozzle and a grouting pump. The end bearing pile structure comprises a reinforcement cage and a plurality of drill holes which are longitudinally formed in the reinforcement cage and lead to the pile end. A rotation increasing spray head is arranged at the output end of the high-pressure pump, and the rotation increasing spray head is movably arranged at the bottom of the drill hole; and the output end of the grouting pump is detachably mounted on the drill hole. The sediment of the end bearing pile is treated in the mode that cleaning is conducted through the rotation increasing spray head and cement paste is injected through the grouting pump, the disease problem that the sediment is too thick or the pile is broken due to mud clamping is effectively solved, hidden dangers existing in a pile foundation are efficiently treated, and a foundation guarantee is provided for stabilizing the foundation of a building and building and maintaining the safety of facilities; and the cost for treating the original scrapped pile body and re-piling the foundation pile can be reduced to a great extent, and the time cost for treating diseases can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of underground structures, in particular to a device for processing end-bearing pile sediment. Background Art

[0002] End-bearing piles are a foundation engineering technology commonly used for supporting deep foundation pits and cantilever bridge structures. They are widely used in various industries, including industrial, civil, highway, railway, power, and water conservancy. The bearing stratum at the end of an end-bearing pile is often moderately weathered bedrock or dense gravel, pebbles, and other strata. After the foundation pile is bored, it is inevitable that the steel cage will hit the hole wall during lowering. This contact causes weathered rock and gravel on the side walls to fall to the bottom of the hole, generating sediment. Cleaning the bottom after lowering the steel cage can also easily disturb the hole wall, generating sediment again.

[0003] Therefore, sediment is unavoidable during construction. During underwater concrete pouring, this sediment can cause the bottom of the conduit to rise above the concrete level, resulting in mud-entrained and broken piles. Ultimately, this can lead to excessive pile settlement and even the destruction of foundation piles. Therefore, sediment poses a significant risk to project quality and must be promptly removed during construction.

[0004] Currently, methods for treating excessively thick sediment or broken piles with deep mud inclusions primarily involve destroying the original foundation piles and re-grouting them, grouting the sidewalls, and driving additional foundation piles around the original piles. These treatment processes are costly and time-consuming. Therefore, a low-cost, simple-to-use, high-quality treatment device for excessively thick sediment or broken piles with deep mud inclusions is needed. Summary of the Invention

[0005] In view of the above technical problems existing in the prior art, the utility model provides a device for processing end-bearing pile sediments, which processes the sediments and improves the bearing capacity or integrity of the end-bearing pile ends.

[0006] The utility model discloses a device for processing end-bearing pile sediment, comprising an end-bearing pile structure, a high-pressure pump, a swirl-increasing nozzle and a grouting pump; the end-bearing pile structure comprises a steel cage and a plurality of boreholes longitudinally arranged on the steel cage and leading to the pile end; the output end of the high-pressure pump is provided with a swirl-increasing nozzle, and the swirl-increasing nozzle is movably arranged at the bottom of the borehole; the output end of the grouting pump is detachably or movably mounted on the borehole.

[0007] Preferably, the steel cage is fixed in the pile hole of the end-bearing pile.

[0008] Preferably, the drill hole includes an opening and a second opening provided on the lower side of the opening;

[0009] A grouting pipe is provided on the opening.

[0010] Preferably, the diameter of the first opening is 100-110 mm and the depth is 0-6 meters; the diameter of the grouting pipe is 90-100 m; the diameter of the second opening is 70-90 mm, and is drilled to 0.2 to 0.3 m below the bottom of the sediment or the bottom of the mud-entrained broken pile.

[0011] Preferably, a flange is provided at the lower end of the grouting pipe.

[0012] Preferably, it further comprises a drilling rig, wherein the output end of the drilling rig is connected to the drill rod;

[0013] The drill rod is connected to the rotation-increasing nozzle.

[0014] Preferably, the output end of the high-pressure pump is connected to the rotation-increasing nozzle through a drill pipe;

[0015] The output end of the grouting pump is connected to the grouting pipe.

[0016] Preferably, the upper end of the rotation-increasing nozzle is provided with a joint that matches the drill rod, the lower end is provided with a head, and the side wall is provided with a plurality of nozzles.

[0017] Preferably, a spiral water passage is provided on the nozzle.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the sediment of the end-bearing piles is treated by cleaning with a swirl nozzle and injecting cement slurry with a grouting pump, effectively solving the problems of excessively thick sediments or broken piles caused by mud, efficiently dealing with the hidden dangers of pile foundations, providing a basic guarantee for stabilizing the foundations of buildings and maintaining the safety of facilities, and greatly reducing the cost of treating the original scrapped piles and re-driving the foundation piles, as well as reducing the time cost of treating the problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flow chart of the method for treating end bearing pile sediment;

[0020] Figure 2 This is a schematic diagram of hole washing for sediment treatment of end-bearing piles;

[0021] Figure 3 It is a schematic diagram of grouting;

[0022] Figure 4 It is a longitudinal cross-sectional view of the swirl-increasing nozzle;

[0023] Figure 5 is a cross-sectional view of the nozzle.

[0024] Markings in the figure:

[0025] 1 end-bearing pile structure, 11 pile hole, 12 pile end, 13 steel cage, 15 pile hole wall, 2 sediment;

[0026] 3 drilling, 31 opening, 32 second opening, 35 grouting pipe, 37 flange,

[0027] 4 drilling rig, 5 high-pressure pump, 51 drill pipe, 52 rotation-increasing nozzle, 53 joint, 54 nozzle, 55 spiral water channel, 56 head, 6 grouting pump. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0029] The present invention is described in further detail below with reference to the accompanying drawings:

[0030] like Figure 1-3 As shown, the method for using the processing device of the present invention includes the following steps:

[0031] Step 101 : A plurality of boreholes 3 leading to the pile end 12 / bottom are longitudinally arranged on the reinforcement cage 13 of the end-bearing pile to be processed, so as to form an end-bearing pile structure 1 .

[0032] Step 102: High-pressure water is introduced into the bottom of the borehole 3 through the rotation-increasing nozzle 52 to clean the bottom of the borehole 3.

[0033] Step 103: Inject high-pressure cement slurry to replace the liquid, sediment 2 or mud trapped in the broken pile in the borehole.

[0034] By cleaning and injecting cement slurry, the sediment of the end-bearing piles is treated, effectively solving the problems of excessively thick sediments or broken piles caused by mud, and efficiently dealing with the hidden dangers of pile foundations. This provides a basic guarantee for stabilizing the foundations of buildings and maintaining the safety of facilities, and can greatly reduce the cost of dealing with the original scrapped piles and re-driving foundation piles, as well as the time cost of dealing with the problems.

[0035] like Figure 2 and Figure 3 The drill hole 3 adopts a two-opening structure, including a first opening 31 and a second opening 32 arranged below the first opening 31. A grouting pipe 35 is provided on the first opening 31. A flange 37 is provided at the lower end of the grouting pipe 35. The diameter of the first opening is 100-110 mm and the depth is 0-6 meters. The diameter of the grouting pipe is 90-100 m. The diameter of the second opening is 70-90 mm.

[0036] In step 101, two to five drill holes can be drilled into the steel cage 13 to the defect location. In one embodiment, the depth of the first drill hole is 0 to 6 meters, determined by the pile length. A 108mm drill bit is used to drill a 110mm hole, which is then inserted into a 104mm grouting pipe. The second drill hole is drilled using a 89mm or 75mm drill bit to a position 0.2 to 0.3 meters below the bottom of the sediment 2 or the bottom of the mud-entrained broken pile. A flange with an outer diameter of 109mm is welded to the bottom of the grouting pipe, and cement slurry (cement mortar) with a grade higher than the concrete is used to secure the grouting pipe and the hole wall.

[0037] In step 102, high-pressure clean water is used for hole washing. The clean water is pressurized by a high-pressure pump and transported to the defect position through the drill pipe. A rotation-enhancing nozzle is connected to the bottom of the drill pipe so that the sprayed high-pressure clean water has a rotating torque, which maximizes the disturbance and churning force of the sediment and mud at the defect position to improve the cleaning effect. The high-pressure clean water carries the disturbed sediment and mud to the ground from the hole mouth.

[0038] More specifically, the method for cleaning the sediment includes:

[0039] Step 201 : Connect the end of the drill rod 51 to the rotation-increasing nozzle 52 , and lower the rotation-increasing nozzle 52 to the bottom of the borehole 3 .

[0040] Step 202 : High-pressure water is introduced into the rotation-increasing nozzle 52 through the high-pressure pump 5 and the drill rod 51 to clean the bottom of the borehole 3 .

[0041] A specific connection structure is as follows: the high-pressure pipeline of the high-pressure pump 5 is connected to the grouting pipe 35, and high-pressure water is introduced into the borehole; the output end of the drilling rig 4 is connected to the drill rod 51; and the drill rod 51 is movably installed in the high-pressure pipeline.

[0042] Step 203: During cleaning, the drill rod 51 and the rotation-increasing nozzle 52 are rotated and repeatedly raised and lowered until clean water overflows from the orifice of the adjacent borehole or the current borehole.

[0043] Step 204: Clean the drilled holes one by one.

[0044] Rotating high-pressure water can more effectively disturb sediment and mud at defective locations, significantly improving cleaning effectiveness. When performing jet cleaning at the bottom of the hole, the drill bit is rotated and repeatedly raised and lowered to repeatedly flush the defective area. The hole is considered initially qualified when clean water overflows from the hole. The high-pressure pipeline is then connected to the grouting pipe, and pressurized water is used to clean each drill hole one by one until clean water overflows from all other holes. The jet pressure should be no less than 20 MPa.

[0045] In step 103, high-grade cement slurry or cement mortar is used to replace the removed sediment, mud inclusions, or gaps in the end-bearing pile bearing layer. This ultimately improves the bearing capacity of the end-bearing pile bearing layer and the overall integrity of the mud inclusions and broken piles, ultimately achieving the goal of improving the bearing capacity and overall integrity of the defective foundation piles.

[0046] Specific methods for injecting high-pressure cement slurry include:

[0047] Step 301: Connect the output end of the grouting pump 6 to the grouting pipe 35.

[0048] Step 302: High-pressure cement slurry or cement mortar is passed through the grouting pipe 35 into the borehole 3 until any of the following termination criteria are met: Cement one to two grades higher than the cement used in the pile concrete can be used, and the water-cement ratio is determined based on the type of sediment and the hole washing conditions.

[0049] Step 303: For the boreholes from which slurry returns during cleaning, the slurry returning to the orifices of the other boreholes is used as the end criterion.

[0050] Step 304: If the current borehole is disconnected from the adjacent borehole, bottom hole grouting is used, with the grout returning to the current borehole opening as the termination criterion. During bottom hole grouting, the current borehole opening is typically not sealed. The output end of the grouting pipe is movably mounted within the borehole and extends toward the bottom of the borehole.

[0051] Step 305: If the slurry level drops after the grouting is completed, slurry should be replenished in time.

[0052] Step 306: Connect the cement slurry pipe of the grouting pump 6 to the grouting pipe hole by hole, and use high-pressure cement slurry to replace the well washing fluid, sediment or mud in the broken pile in the hole. The grouting pressure is not less than 20Mpa.

[0053] like Figure 2-Figure 5 The processing device of the present invention includes a drilling rig 4, a high-pressure pump 5, a rotation-increasing nozzle 52 and a grouting pump 6; the drilling rig 4 is used to obtain an end-bearing pile structure 1, and the end-bearing pile structure 1 includes a steel cage 13, and a plurality of boreholes 3 leading to the pile end 12 arranged longitudinally on the steel cage 13; the output end of the high-pressure pump 5 is provided with a rotation-increasing nozzle 52, and the rotation-increasing nozzle 52 is movably arranged at the bottom of the borehole 3; the output end of the grouting pump 6 is detachably mounted on the borehole 3.

[0054] The steel cage 13 is fixed in the pile hole 11 of the end-bearing pile, and the steel cage 13 is attached to the pile hole wall 15; the drilled hole 3 includes an opening 31 and two openings 32 arranged on the lower side of the opening 31; a grouting pipe 35 is provided on the opening 31; and a flange 37 is provided at the lower end of the grouting pipe 35.

[0055] The output end of the drilling rig 4 is connected to the drill rod 51 ; the output end of the high-pressure pump 5 is connected to the swirl-increasing nozzle 52 through the drill rod 51 ; the output end of the grouting pump 6 is connected to the grouting pipe 35 .

[0056] like Figure 4 and Figure 5 The upper end of the swirl-increasing nozzle 52 is provided with a joint 53 that matches the drill rod 51, the lower end is provided with a head 56, and a plurality of nozzles 54 are provided on the side wall; the nozzle 54 is provided with a spiral water passage 55.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for treating end-bearing pile sediment, characterized in that: It comprises an end-bearing pile structure (1), a high-pressure pump (5), a swirl-increasing nozzle (52) and a grouting pump (6); The end-bearing pile structure (1) comprises a steel cage (13) and a plurality of boreholes (3) longitudinally arranged on the steel cage (13), wherein the boreholes (3) lead to the pile end (12) at the bottom of the end-bearing pile; The output end of the high-pressure pump (5) is provided with a swirl-increasing nozzle (52), and the swirl-increasing nozzle (52) is movably arranged at the bottom of the borehole (3); The output end of the grouting pump (6) is detachably mounted on the borehole (3).

2. The processing device according to claim 1, characterized in that The steel cage (13) is fixed in the pile hole (11) of the end-bearing pile.

3. The processing device according to claim 1, characterized in that The drill hole (3) includes an opening (31) and two openings (32) arranged on the lower side of the opening (31); A grouting pipe (35) is provided on the opening (31).

4. The processing device according to claim 3, characterized in that The diameter of the first opening is 100-110 mm and the depth is 0-6 meters; the diameter of the grouting pipe is 90-100 meters; the diameter of the second opening is 70-90 mm and is drilled to 0.2-0.3 meters below the bottom of the sediment (2) or the bottom of the mud-entrained broken pile.

5. The processing device according to claim 3, characterized in that The lower end of the grouting pipe (35) is provided with a flange (37).

6. The processing device according to claim 3, characterized in that It also includes a drilling machine (4), wherein the output end of the drilling machine (4) is connected to the drill rod (51); The drill rod (51) is connected to the rotation-increasing nozzle (52).

7. The processing device according to claim 6, characterized in that The output end of the high-pressure pump (5) is connected to the swirl-increasing nozzle (52) via a drill rod (51); or The output end of the grouting pump (6) is connected to the grouting pipe (35).

8. The processing device according to claim 1, characterized in that The upper end of the rotation-increasing nozzle (52) is provided with a joint (53) matched with the drill rod (51), the lower end is provided with a head (56), and the side wall is provided with multiple nozzles (54).

9. The processing device according to claim 8, characterized in that The nozzle (54) is provided with a spiral water passage (55).

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