CN216839452U - Mechanical extrusion and high-pressure grouting system for treating sediment at cast-in-place pile end - Google Patents
Mechanical extrusion and high-pressure grouting system for treating sediment at cast-in-place pile end Download PDFInfo
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- CN216839452U CN216839452U CN202121184714.4U CN202121184714U CN216839452U CN 216839452 U CN216839452 U CN 216839452U CN 202121184714 U CN202121184714 U CN 202121184714U CN 216839452 U CN216839452 U CN 216839452U
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Abstract
The utility model relates to a mechanical extrusion and high-pressure grouting system for bored concrete pile end sediment treatment, including hydraulic extrusion device and high-pressure grouting device, hydraulic extrusion device sets up in the steel reinforcement cage bottom of bored concrete pile, with steel reinforcement cage fixed connection, high-pressure grouting device is connected with hydraulic extrusion device, high-pressure grouting device pushes away along the downward motion of bored concrete pile along with the drive end of hydraulic extrusion device; the driving end of the hydraulic extrusion device pushes the mixture of the concrete and the sediment at the bottom of the cast-in-place pile downwards along the cast-in-place pile to compact and compact the mixture so as to generate a transverse crack space at the concrete pile section at the bottom of the cast-in-place pile, and high-pressure grouting is carried out on the crack space and the pile side through the grouting end of the high-pressure grouting device; the utility model discloses a set up in the hydraulic extrusion device top of steel reinforcement cage bottom and push away and make bottom pile section produce the crack space, utilize high-pressure slip casting device to carry out quantitative pressure slip casting, realize the effective compaction of sediment at the bottom of the stake, reach the purpose that improves foundation pile bearing capacity, reduction engineering cost.
Description
Technical Field
The utility model belongs to the technical field of pile foundation engineering, especially, relate to a mechanical extrusion and high-pressure slip casting system for bored concrete pile end sediment is handled.
Background
The cast-in-place reinforced concrete pile is widely applied to the construction of basic facilities such as high-rise buildings, traffic engineering, municipal engineering and the like, and has the advantages of low cost, high bearing capacity, high construction efficiency and the like. However, the cast-in-place pile construction has a major drawback that sediment with a certain thickness is formed at the bottom of the pile in the processes of hole forming construction and cage setting construction, and the sediment soil at the bottom of the pile can cause the technical problems of reduced bearing capacity of the foundation pile, overlarge sedimentation amount and the like, and the cast-in-place pile has more engineering quality problems. In order to reduce the thickness of the pile bottom sediment, hole cleaning measures can be adopted in the construction of general cast-in-place piles to reduce the thickness of the pile bottom sediment, but in actual engineering, the hole cleaning construction is difficult to meet the technical requirement of pile foundation specification on the thickness of the pile bottom sediment.
In the prior art, in order to solve the above-mentioned construction technical problems, the construction of the cast-in-place pile adopts a pile-end post-grouting technology, and it is desired to compact the pile bottom sediment by the post-grouting technology, so as to improve the single-pile bearing capacity of the cast-in-place pile. However, the post-grouting effect of the pile end is often influenced by the type of the rock and soil at the pile end, grouting equipment and grouting process, and particularly, the post-grouting quality in cohesive soil and soft clay layers is difficult to control, the post-grouting effect is poor, and the reliability of post-grouting construction is low. In addition, the traditional post-grouting construction can not effectively control grouting pressure, slurry flow direction and diffusion compaction range, and the problem of uncertainty of post-grouting construction effect is difficult to solve. Therefore, in order to ensure that the cast-in-place pile meets the design requirements of bearing capacity and settlement, the traditional pile-end post-grouting technology needs to be innovated and developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a mechanical extrusion and high-pressure slip casting system for bored concrete pile end sediment is handled for reinforced concrete bored concrete pile post-grouting construction technique to can reach the intensity and the foundation pile bearing capacity that improve pile end concrete and sediment mixture through the crowded close bored concrete pile's of controllable quantitative technique pile bottom sediment of compaction effectively, reduce foundation pile settlement volume, and can show and reduce the bored concrete pile cost.
The utility model aims at completing the technical scheme that the mechanical extrusion and high-pressure grouting system for the sediment treatment of the cast-in-place pile end comprises a hydraulic extrusion device and a high-pressure grouting device, wherein the hydraulic extrusion device is arranged at the bottom end of a reinforcement cage of the cast-in-place pile and is fixedly connected with the reinforcement cage, the high-pressure grouting device is connected with the hydraulic extrusion device, and the high-pressure grouting device moves downwards along the axial direction of the cast-in-place pile along with the pushing of the driving end of the hydraulic extrusion device; and the driving end of the hydraulic extrusion device pushes downwards along the axial direction of the cast-in-place pile to compact the mixture of the concrete and the sediment at the bottom of the pile, so that a transverse crack space is generated at the concrete pile section at the bottom of the cast-in-place pile, and high-pressure grouting is performed to the crack space and the pile side through the grouting end of the high-pressure grouting device.
Preferably, the hydraulic extrusion device comprises a pressing plate, a steel hoop and a driving mechanism for driving the pressing plate to move vertically, the steel hoop is connected to the bottom of the steel reinforcement cage, the driving mechanism is installed on the steel hoop, the upper end face of the pressing plate is connected with the driving end of the driving mechanism, and the lower end face of the pressing plate faces to the sediment at the bottom of the pile.
Preferably, the driving mechanism comprises a hydraulic extrusion unit and a hydraulic station arranged on the ground surface, the hydraulic extrusion unit is tightly attached to the inner side of the steel hoop and is fixed, the hydraulic station is used for providing a power source for the hydraulic extrusion unit, and the pressing plate is connected with the driving end of the hydraulic extrusion unit.
Preferably, the hydraulic extrusion device further comprises a transverse hydraulic pipeline and a vertical hydraulic pipeline, the vertical hydraulic pipeline is communicated with the transverse hydraulic pipeline, the vertical hydraulic pipeline is located on the inner side of the steel hoop, and the upper portion of the vertical hydraulic pipeline penetrates through the cast-in-place pile to be connected with an oil outlet arranged in the hydraulic station in a sealing mode.
Preferably, at least three hydraulic extrusion units are arranged, the hydraulic extrusion units are uniformly distributed along the circumferential direction of the steel hoop and are fixed on the upper end surface of the pressing plate, and oil inlets of the hydraulic extrusion units are communicated in series through the transverse hydraulic pipelines.
Preferably, the steel reinforcement cage includes many vertical main muscle, spiral stirrup and many splice bars, many vertical main muscle be the circumferencial direction and arrange the setting, just the periphery side of fixing at many vertical main muscle is tied up to the spiral stirrup, many the upper end of splice bar is connected respectively many the lower extreme section of vertical main muscle, many the lower extreme of splice bar respectively with the steel hoop is connected.
Preferably, the center of the pressure plate is provided with a through hole, and the section of the pressure plate is in a ring shape.
Preferably, the high-pressure grouting device comprises a vertical grouting pipe, a vertical grouting telescopic pipe, an annular grouting channel fixed on the upper end surface of the pressing plate and a high-pressure grouting pump arranged on the ground surface, the lower end of the vertical grouting pipe is connected with the upper end of the vertical grouting telescopic pipe, the vertical grouting pipe is penetrated through the grouting pile and communicated with the outlet end of the high-pressure grouting pump, the lower end of the vertical grouting telescopic pipe is communicated with an annular transverse grouting pipeline, and the annular transverse grouting pipeline is positioned in the annular grouting channel or on the upper end surface of the outer side wall of the annular grouting channel; and a plurality of grouting holes distributed along the circumferential direction are formed in the side wall of the annular transverse grouting pipeline.
Preferably, one end, close to the vertical grouting pipe, of the vertical grouting telescopic pipe is provided with a flexible sealing sleeve, the lower end of the vertical grouting pipe is inserted into the upper end of the vertical grouting telescopic pipe in a sliding mode, the inner side wall of the upper end of the flexible sealing sleeve is attached and sealed to the outer side wall of the vertical grouting pipe, and the flexible sealing sleeve and the vertical grouting pipe are axially slidable.
Preferably, the plurality of grouting holes are all sealed by rubber sleeves to form a plurality of one-way grouting valves, and the plurality of grouting holes can realize unidirectional grouting from the grouting holes to the outside under the pressure grouting of high-pressure cement slurry.
The utility model has the advantages that:
1. the utility model discloses a hydraulic extrusion device is with the downward perpendicular compaction pile base concrete and sediment mixture of controllable mode, and the device's top pushing pressure and top pushing stroke can pass through the accurate control in earth's surface hydraulic pressure station to ensure the fracture space size that realizes bored concrete pile end design, and effective control pressure slip casting diffusion path, distribution space and slip casting total amount.
2. The utility model is suitable for a multiple type bored concrete pile, including drilling bored concrete pile, punching bored concrete pile, rammer expand bored concrete pile and dig the stake etc. soon, end-bearing pile, friction end-bearing pile or the end-bearing friction stake of the well short length of specially adapted 15m ~ 50 m.
3. Through adjusting the number of the vertical hydraulic extrusion unit assemblies of the hydraulic extrusion device, and the pushing pressure and the pushing stroke, the quantitative control can be performed on the compaction compression amount of the mixture of the pile end concrete and the sediment, so that the bearing capacity improvement degree and the sedimentation amount of the foundation pile are reasonably controlled, and the grouting material is effectively saved.
4. The expected larger crack space can be generated by pushing by using the hydraulic extrusion device, so that the injectability, continuity and uniformity of high-pressure slurry are effectively improved, upward pressure injection and diffusion of the high-pressure slurry along a pile side interface are facilitated, and the pile side frictional resistance can be effectively improved while the bearing force of the foundation pile end is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of a cast-in-place pile according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a hydraulic extrusion device according to embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a high-pressure grouting device according to embodiment 1 of the present invention;
fig. 4 is a schematic view of a connection structure between a steel reinforcement cage and a steel hoop according to embodiment 1 of the present invention;
fig. 5 is a schematic top view of the mechanical pressing and high-pressure grouting system according to embodiment 1 of the present invention;
fig. 6 is a schematic structural sectional view of a mechanical extrusion and high-pressure grouting system according to embodiment 1 of the present invention;
fig. 7 is a schematic structural plan view of a mechanical extrusion and high-pressure grouting system according to embodiment 2 of the present invention;
fig. 8 is a schematic structural sectional view of a mechanical extrusion and high-pressure grouting system according to embodiment 2 of the present invention.
The reference numbers in the drawings are respectively: 1. a hydraulic extrusion device; 2. a high-pressure grouting device; 3. a drive mechanism; 4. a hydraulic extrusion unit; 5. a vertical hydraulic line; 6. a hydraulic station; 7. a vertical grouting pipe; 8. a vertical grouting extension pipe; 9. an annular transverse grouting pipeline; 10. an annular grouting channel; 11. a flexible sealing sleeve; 12. a reinforcement cage; 13. a vertical main rib; 14. a spiral stirrup; 15. connecting ribs; 16. a steel hoop; 17. pressing a plate; 18. a transverse hydraulic line; 20. filling piles; 24. a high-pressure grouting pump; 25. an oil inlet valve; 26. grouting holes; 27. a rubber sleeve; 28. one-way grouting valve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings: as shown in the accompanying drawings 1 to 8, the utility model comprises a hydraulic extrusion device 1 and a high-pressure grouting device 2, wherein the hydraulic extrusion device 1 is arranged at the bottom end of a reinforcement cage 12 of a cast-in-place pile 20 and is fixedly connected with the reinforcement cage 12, the high-pressure grouting device 2 is connected with the hydraulic extrusion device 1, and the high-pressure grouting device 2 moves downwards along the axial direction of the cast-in-place pile 20 along with the movement of the ejection end of the hydraulic extrusion device 1; the ejection end of the hydraulic extrusion device 1 pushes downwards along the axial direction of the cast-in-place pile 20 to compact the mixture of the concrete at the bottom of the pile and the sediment, and a transverse crack space is generated at the concrete pile section at the bottom of the cast-in-place pile 20, and high-pressure grouting is carried out on the crack space and the pile side through the grouting end of the high-pressure grouting device 2; the pile section at the bottom generates a crack space through the pushing of the hydraulic extrusion device arranged at the bottom end of the reinforcement cage, and quantitative pressure grouting is performed by using the high-pressure grouting device, so that the effective compaction of the sediment at the bottom of the pile is realized, and the aims of improving the bearing capacity of the foundation pile and reducing the engineering cost are finally fulfilled.
The hydraulic extrusion device 1 comprises a pressing plate 17, a steel hoop 16 and a driving mechanism 3 for driving the pressing plate 17 to move vertically, wherein the steel hoop 16 is connected to the bottom end of the reinforcement cage 12, the driving mechanism 3 is installed on the steel hoop 16, the upper end face of the pressing plate 17 is connected with the driving end of the driving mechanism 3, and the lower end face of the pressing plate 17 faces to the sediment at the bottom of the pile; thus, when the pressure plate 17 is driven by the driving mechanism 3, the pressure plate 17 can directly and effectively extrude the sediment at the bottom of the pile.
The driving mechanism 3 comprises a hydraulic extrusion unit 4 and a hydraulic station 6 arranged on the ground surface, and the hydraulic extrusion unit 4 is tightly attached to the inner side of the steel hoop 16 and fixed, so that the structure of the whole driving mechanism in the cast-in-place pile 20 is more compact, and the space is effectively utilized; the hydraulic station 6 is used for providing a power source for the hydraulic extrusion unit 4, the pressing plate 17 is connected with the driving end of the hydraulic extrusion unit 4, and the hydraulic extrusion unit 4 is a jack; therefore, the pushing pressure and the pushing stroke can be accurately controlled through a hydraulic station on the ground surface, so that the size of a cracking space designed at the pile end of the cast-in-place pile is ensured, and a pressure grouting diffusion path, a distribution space and the total grouting amount are effectively controlled.
The hydraulic extrusion device 1 further comprises a transverse hydraulic pipeline 18 and a vertical hydraulic pipeline 5, wherein the vertical hydraulic pipeline 5 is communicated with the transverse hydraulic pipeline 18, the vertical hydraulic pipeline 5 is positioned on the inner side of the steel hoop 16, and a cast-in-place pile 20 penetrates through the vertical hydraulic pipeline and is connected with an oil outlet arranged in the hydraulic station 6 in a sealing mode; in this way, the hydraulic extrusion units 4 can be connected in series and can be controlled simultaneously through the transverse hydraulic lines 18 and can be controlled directly through the hydraulic station 6 through the vertical hydraulic lines 5; the transverse hydraulic line 18 is located within the annular grouting channel 10 or on the upper end face of the outer side wall of the annular grouting channel 10.
Three hydraulic extrusion units 4 are arranged, the hydraulic extrusion units 4 are uniformly distributed along the circumferential direction of the steel hoop 16 and are fixed on the upper end surface of the pressing plate 17, and oil inlets of each hydraulic extrusion unit 4 are communicated in series through a transverse hydraulic pipeline 18; this allows the hydraulic compression unit 4 to be more stable in driving the platen 17.
The reinforcement cage 12 comprises a plurality of vertical main reinforcements 13, spiral stirrups 14 and a plurality of connecting reinforcements 15, wherein the vertical main reinforcements 13 are arranged in the circumferential direction, the spiral stirrups 14 are tied and fixed on the outer peripheral sides of the vertical main reinforcements 13, the upper ends of the connecting reinforcements 15 are respectively connected to the lower end sections of the vertical main reinforcements 13, and the lower ends of the connecting reinforcements 15 are respectively connected with the steel hoop 16; this makes the steel hoop 16 more stable after being fixed.
The center of the pressure plate 17 is provided with a through hole and the section of the pressure plate 17 is in a ring shape, so that when the cast-in-place pile 20 is poured, the sediment at the bottom of the pile can conveniently return slurry from the central through hole of the pressure plate 17.
The high-pressure grouting device 2 comprises a vertical grouting pipe 7, a vertical grouting telescopic pipe 8, an annular grouting channel 10 fixed on the upper end surface of a pressure plate and a high-pressure grouting pump 24 arranged on the ground surface, the lower end of the vertical grouting pipe 7 is connected with the upper end of the vertical grouting telescopic pipe 8, a grouting pile 20 penetrates through the vertical grouting pipe 7 and is communicated with the outlet end of the high-pressure grouting pump 24, the lower end of the vertical grouting telescopic pipe 8 is communicated with an annular transverse grouting pipeline 9, and the annular transverse grouting pipeline 9 is positioned in the annular grouting channel 10 or on the upper end surface of the outer side wall of the annular grouting channel 10; a plurality of grouting holes 26 distributed along the circumferential direction are formed in the side wall of the annular transverse grouting pipeline 9; through the arrangement of the high-pressure grouting device 2, a bottom pile section can generate a crack space, quantitative pressure grouting is performed by using the high-pressure grouting device, effective compaction of sediment at the bottom of the pile is realized, and the aims of improving the bearing capacity of the foundation pile and reducing the engineering cost are finally fulfilled.
A flexible sealing sleeve 11 is arranged at one end, close to the vertical grouting pipe 7, of the vertical grouting telescopic pipe 8, the lower end of the vertical grouting pipe 7 is inserted into the upper end of the vertical grouting telescopic pipe 8 in a sliding manner, the inner side wall at the upper end of the flexible sealing sleeve 11 is attached and sealed on the outer side wall of the vertical grouting pipe 7, and the flexible sealing sleeve 11 and the vertical grouting pipe 7 can slide along the axial direction; when the pressing plate 17 is pushed by the hydraulic extrusion unit 4 and moves vertically downwards along the axial direction of the cast-in-place pile 20, the vertical grouting telescopic pipe 8 generates vertical displacement along with the vertical displacement so as to ensure the smoothness of a cement paste high-pressure grouting pipeline and maintain the smoothness of all cement paste grouting pipelines.
The outsides of the grouting holes 26 are all sealed by rubber sleeves 27 to form a plurality of one-way grouting valves 28, and the grouting holes 26 can realize unidirectional grouting from the grouting holes 26 to the outsides thereof under the pressure grouting of high-pressure cement paste; therefore, not only can concrete mortar be prevented from entering the grouting holes 26 when the cast-in-place pile 20 is poured, but also the rubber sleeve 27 can be timely opened to realize unidirectional grouting when high-pressure grouting is carried out on the crack space and the pile side through the grouting holes 26; when not being grouted with cement paste, the rubber sleeve 27 shrinks and seals the grouting hole 26.
Example 1
The utility model discloses it is right to combine embodiment and attached drawing 1 ~ 6 to explain further below the utility model discloses, this embodiment is a drilling bored concrete pile, and the stake is long for 30m, and the stake footpath is 800mm, and the external diameter of steel reinforcement cage 12 is 700mm, the internal diameter is 660mm, and steel reinforcement cage 12 sets up 8 vertical main muscle 13 that the diameter is 20mm to be equipped with 2 vertical slip casting pipes 7. The pile end bearing layer is dense silt, and the standard value of the resistance of the limit end is 1000 kPa.
Utilize the utility model discloses mechanical extrusion and high-pressure slip casting system of pile tip, distribute 3 hydraulic extrusion units 4 evenly and fix on the clamp plate 17 that has the centre bore, and through welding and 16 inboard fixed connections of steel hoop, hydraulic extrusion unit 4 is by the 18 series connections of horizontal hydraulic line, and be linked together through the oil inlet valve 25 that telescopic vertical hydraulic line 5 and hydraulic station 6 set up, this telescopic vertical hydraulic line 5 can refer to the relation of connection between vertical slip casting pipe 7 and the flexible pipe 8 of vertical slip casting in the high-pressure slip casting device 2, can not take place the phenomenon of breaking along with hydraulic extrusion unit 4 in the downward motion process through telescopic vertical hydraulic line 5; vertical slip casting pipe 7 is connected with high-pressure grouting pump 24, the lower extreme of vertical slip casting pipe 7 and the upper end of vertical slip casting telescopic pipe 8 are connected, the through-hole of annular slip casting channel 10 up end is passed to vertical slip casting telescopic pipe 8 bottom, with the horizontal slip casting pipeline 9 fixed connection of annular in the annular slip casting channel 10, the bottom of annular slip casting channel 10 and the top surface welded fastening of clamp plate 17, vertical main muscle 13 and steel hoop 16 welded fastening, the lower extreme of splice bar 15 links together vertical main muscle 13 and steel hoop 16 through the welding mode.
In the embodiment, the number of the hydraulic extrusion units 4 is 3, the diameter of each hydraulic extrusion unit 4 is 140mm, 3 hydraulic extrusion units 4 are connected in series to form an annular hydraulic passage through a transverse hydraulic pipeline 18, the transverse hydraulic pipeline 18 is connected with an oil inlet of each hydraulic extrusion unit 4 through an oil valve, a vertical hydraulic pipeline 5 vertically penetrates through a through hole in the upper end face of an annular grouting channel 10 downwards along the side wall of the vertically arranged hydraulic extrusion unit 4, the transverse hydraulic pipeline 18 is annularly laid along the inside of the annular grouting channel 10, a distance is reserved between the transverse hydraulic pipelines 18 near the oil inlet of the hydraulic extrusion units 4 to ensure that the transverse hydraulic pipeline 18 is not broken when a pressing plate 17 moves downwards, the telescopic vertical hydraulic pipeline 5 and the transverse hydraulic pipeline 18 are connected into the hydraulic passage through the oil valves, the telescopic vertical hydraulic pipeline 5 extends upwards to the ground along a vertical grouting pipe 7 and is in sealed connection with the hydraulic station 6, the telescopic vertical hydraulic pipeline 5 and the vertical grouting pipe 7 are bound together with the vertical main rib 13 through steel wires, and a distance is reserved near the annular grouting channel 10 of the telescopic vertical hydraulic pipeline 5 so as to ensure that the telescopic vertical hydraulic pipeline 5 is not broken when the pressing plate 17 moves downwards.
The loading capacity of the hydraulic extrusion unit 4 in the embodiment depends on the standard value of the extreme end resistance of the pile end rock soil and the set number of the hydraulic extrusion units 4. According to the pile foundation design, the standard value of the ultimate end resistance of the cast-in-place pile 20 in the embodiment is 44 tons, and the loading capacity of the single hydraulic extrusion unit 4 in the embodiment is 15 tons, which can meet the requirement.
In this embodiment, the pressing plate 17 is an annular steel plate, the outer diameter of the pressing plate 17 is slightly smaller than the inner diameter of the reinforcement cage 12, the grout returning hole in the center of the pressing plate 17 is circular, the diameter of the grout returning hole is 350mm, and the technical requirement of upward normal grout returning in the concrete pouring process of the pile body can be met.
In the embodiment, the vertical grouting pipe 7 adopts 2 steel pipes and is symmetrically distributed along the reinforcement cage, the lower part of the vertical grouting pipe 7 is connected with the upper part of the vertical grouting telescopic pipe 8 in a sleeved mode, and the vertical grouting pipe 7 is fixedly connected with the vertical main reinforcement 13 of the reinforcement cage 12.
The horizontal slip casting pipeline 9 of annular is the annular and places in annular slip casting channel 10 is inside, the horizontal slip casting pipeline 9 of annular and the flexible 8 bottom ends of pipe fixed connection formation slip casting passageways of vertical slip casting, even symmetry sets up on the horizontal slip casting pipeline 9 of annular is equipped with 8 injected hole 26, and 8 injected hole 26 all seals and forms 8 one-way slip casting valves 28 with rubber sleeve 27 outward, the injected hole setting orientation of one-way slip casting valve 28 is the central direction of clamp plate 17, guarantee that one-way slip casting valve can realize following the horizontal slip casting pipeline 9 of annular to its outside one-way slip casting under high pressure cement strikes.
In the embodiment, the inner diameter of each of the 2 vertical grouting telescopic pipes 8 is slightly larger than the outer diameter of each of the 2 vertical grouting pipes 7, the upper parts of the vertical grouting telescopic pipes 8 are connected with the lower parts of the vertical grouting pipes 7 in a sleeved mode, the connecting port is flexibly sealed by the flexible sealing sleeves 11, and the bottom ends of the vertical grouting telescopic pipes 8 penetrate through holes in the upper end face of the annular grouting channel 10 and are fixedly connected with the annular transverse grouting pipeline 9 to form a grouting passage.
Example 2
The utility model discloses a mechanical extrusion and high-pressure slip casting system corresponding application method includes following process steps:
s1, fixedly connecting the main bodies of the hydraulic pushing grouting device 1 and the high-pressure grouting device 2 to the bottom end of the reinforcement cage 12, and stably hoisting the reinforcement cage 12 into the designed depth position in the pile hole;
s2, performing concrete pouring on the pile hole from bottom to top through the concrete guide pipe to form the cylindrical reinforced concrete pouring pile 20;
s3, after the cast-in-place pile 20 is maintained for 1-3 days, starting the hydraulic station 6, controlling each hydraulic extrusion unit 4 of the hydraulic extrusion device 1 to push through the hydraulic drive of the hydraulic station 6, further pushing the pressing plate 17 downwards, and strongly compacting and compacting the mixture of the concrete and the sediment at the bottom of the foundation pile;
s4, after the pressing plate 17 vertically moves downwards, the bottom concrete pile section of the cast-in-place pile 20 generates a transverse crack space, then the high-pressure grouting pump 24 is started, cement slurry is injected into the annular transverse grouting pipeline 9 through the grouting pipeline under the action of pressure, each grouting hole 26 in the annular transverse grouting pipeline 9 is plugged, and then high-pressure grouting is carried out on the crack space and the pile side of the bottom pile section through the grouting holes 26;
s5, adopt the utility model discloses a mechanical extrusion and high-pressure slip casting system carry out hydraulic ram to the stake end and push up and high-pressure slip casting 15 days after, the mixture of pile bottom concrete and sediment can be crowded densely, compaction and solidification, forms the complete bored concrete pile 20 of high quality to reach the bearing capacity that improves the foundation pile and reduce the mesh of the settlement volume of foundation pile.
The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a mechanical extrusion and high-pressure slip casting system for bored concrete pile end sediment is handled, includes hydraulic extrusion device (1) and high-pressure slip casting device (2), its characterized in that: the hydraulic pressure extrusion device (1) is arranged at the bottom end of a reinforcement cage (12) of the cast-in-place pile (20) and is fixedly connected with the reinforcement cage (12), the high-pressure grouting device (2) is connected with the hydraulic pressure extrusion device (1), and the high-pressure grouting device (2) moves downwards along the axial direction of the cast-in-place pile (20) along with the pushing of the driving end of the hydraulic pressure extrusion device (1); the driving end of the hydraulic extrusion device (1) pushes downwards along the axial direction of the cast-in-place pile (20) to compact the mixture of the concrete and the sediment at the bottom of the pile, so that a transverse crack space is generated at the concrete pile section at the bottom of the cast-in-place pile (20), and high-pressure grouting is performed to the crack space and the pile side through the grouting end of the high-pressure grouting device (2).
2. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 1, characterized in that: the hydraulic extrusion device (1) comprises a pressing plate (17), a steel hoop (16) and a driving mechanism (3) used for driving the pressing plate (17) to move vertically, the steel hoop (16) is connected to the bottom end of a steel reinforcement cage (12), the driving mechanism (3) is installed on the steel hoop (16), the upper end face of the pressing plate (17) is connected with the driving end of the driving mechanism (3), and the lower end face of the pressing plate (17) faces to sediment at the bottom of a pile.
3. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 2, characterized in that: the driving mechanism (3) comprises a hydraulic extrusion unit (4) and a hydraulic station (6) arranged on the ground surface, the hydraulic extrusion unit (4) is tightly attached to the inner side of the steel hoop (16) and fixed, the hydraulic station (6) is used for providing a power source for the hydraulic extrusion unit (4), and the pressing plate (17) is connected with the driving end of the hydraulic extrusion unit (4).
4. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 3, characterized in that: the hydraulic extrusion device (1) further comprises a transverse hydraulic pipeline (18) and a vertical hydraulic pipeline (5), the vertical hydraulic pipeline (5) is communicated with the transverse hydraulic pipeline (18), the vertical hydraulic pipeline (5) is located on the inner side of the steel hoop (16), and a filling pile (20) penetrates through the vertical hydraulic pipeline and is connected with an oil outlet arranged in the hydraulic station (6) in a sealing mode.
5. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 4, characterized in that: the number of the hydraulic extrusion units (4) is at least three, the hydraulic extrusion units (4) are uniformly distributed along the circumferential direction of the steel hoop (16) and are fixed on the upper end face of the pressing plate (17), and oil inlets of the hydraulic extrusion units (4) are communicated in series through transverse hydraulic pipelines (18).
6. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 2, characterized in that: the reinforcement cage (12) comprises a plurality of vertical main reinforcements (13), spiral stirrups (14) and a plurality of connecting reinforcements (15), the plurality of vertical main reinforcements (13) are arranged in the circumferential direction, the spiral stirrups (14) are tied up and fixed on the outer peripheral sides of the plurality of vertical main reinforcements (13), the upper ends of the plurality of connecting reinforcements (15) are connected to the lower end sections of the plurality of vertical main reinforcements (13) respectively, and the lower ends of the plurality of connecting reinforcements (15) are connected with the steel ring hoops (16) respectively.
7. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 2, characterized in that: the center of the pressure plate (17) is provided with a through hole, and the section of the pressure plate (17) is in a ring shape.
8. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 2, characterized in that: the high-pressure grouting device (2) comprises a vertical grouting pipe (7), a vertical grouting telescopic pipe (8), an annular grouting channel (10) fixed on the upper end face of a pressing plate (17) and a high-pressure grouting pump (24) arranged on the ground surface, the lower end of the vertical grouting pipe (7) is connected with the upper end of the vertical grouting telescopic pipe (8), a grouting pile (20) penetrates through the vertical grouting pipe (7) and is communicated with the outlet end of the high-pressure grouting pump (24), the lower end of the vertical grouting telescopic pipe (8) is communicated with an annular transverse grouting pipeline (9), and the annular transverse grouting pipeline (9) is positioned in the annular grouting channel (10) or on the upper end face of the outer side wall of the annular grouting channel (10); and a plurality of grouting holes (26) distributed along the circumferential direction are arranged on the side wall of the annular transverse grouting pipeline (9).
9. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 8, characterized in that: one end of the vertical grouting telescopic pipe (8) close to the vertical grouting pipe (7) is provided with a flexible sealing sleeve (11), the lower end of the vertical grouting pipe (7) is inserted into the upper end of the vertical grouting telescopic pipe (8) in a sliding mode, the inner side wall of the upper end of the flexible sealing sleeve (11) is attached to and sealed on the outer side wall of the vertical grouting pipe (7), and the flexible sealing sleeve (11) and the vertical grouting pipe (7) can slide along the axial direction.
10. The mechanical extrusion and high pressure grouting system for cast-in-place pile end sediment disposal according to claim 8, characterized in that: the outsides of the grouting holes (26) are all sealed by rubber sleeves (27) to form a plurality of one-way grouting valves (28), and the grouting holes (26) can realize unidirectional grouting from the grouting holes (26) to the outside under the pressure grouting of high-pressure cement paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121184714.4U CN216839452U (en) | 2021-05-31 | 2021-05-31 | Mechanical extrusion and high-pressure grouting system for treating sediment at cast-in-place pile end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121184714.4U CN216839452U (en) | 2021-05-31 | 2021-05-31 | Mechanical extrusion and high-pressure grouting system for treating sediment at cast-in-place pile end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216839452U true CN216839452U (en) | 2022-06-28 |
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| CN113293765A (en) * | 2021-05-31 | 2021-08-24 | 浙江坤德创新岩土工程有限公司 | Mechanical extrusion and high-pressure grouting system for treating sediment at cast-in-place pile end |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113293765A (en) * | 2021-05-31 | 2021-08-24 | 浙江坤德创新岩土工程有限公司 | Mechanical extrusion and high-pressure grouting system for treating sediment at cast-in-place pile end |
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