CN117779778A - Stable externally-hung type grouting device after combined with cast-in-place pile - Google Patents
Stable externally-hung type grouting device after combined with cast-in-place pile Download PDFInfo
- Publication number
- CN117779778A CN117779778A CN202311543408.9A CN202311543408A CN117779778A CN 117779778 A CN117779778 A CN 117779778A CN 202311543408 A CN202311543408 A CN 202311543408A CN 117779778 A CN117779778 A CN 117779778A
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- grouting
- slip casting
- pipe
- outlet pipe
- pile
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 238000007569 slipcasting Methods 0.000 claims abstract description 36
- 230000002787 reinforcement Effects 0.000 claims abstract description 33
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 210000000078 claw Anatomy 0.000 claims description 31
- 238000003466 welding Methods 0.000 claims description 25
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 239000002689 soil Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a combined post grouting device for a stable externally-hung cast-in-place pile, which comprises a steel reinforcement cage, wherein a grouting pipe fixing device for limiting four vertical grouting pipes is arranged on the steel reinforcement cage, and the four vertical grouting pipes are uniformly distributed along the outer side of the steel reinforcement cage; the bottom of perpendicular slip casting pipe passes through screw joint and the interior stake side slip casting outlet pipe of cyclic annular box and stake end slip casting outlet pipe threaded connection, and the top of perpendicular slip casting pipe passes through rubber connecting pipe and grouting device is connected, and the cyclic annular box passes through the connecting plate to be fixed on the transversely distributed reinforcing bar of steel reinforcement cage, and stake side slip casting outlet pipe, stake end slip casting outlet pipe symmetrical arrangement both sides at the steel reinforcement cage both sides, both can realize stake side, stake end joint grouting, can fix perpendicular slip casting pipe through slip casting pipe fixing device again, can prevent to appear disturbing even drop at the in-process perpendicular slip casting pipe of high pressure slip casting to realize the stable slip casting of stake bottom and stake side behind the bored concrete pile.
Description
Technical Field
The invention relates to the technical field of post grouting of cast-in-place piles, in particular to a combined post grouting device for a stable externally hung cast-in-place pile.
Background
Along with the rapid development of urban construction, the application field and the use scale of the bored pile are continuously enlarged. The pile foundation is widely applied to engineering in a plurality of fields of industrial and civil buildings, highways, railways and the like, is one of important pile foundation forms in supporting the construction of infrastructure in China, and has an irreplaceable function. When applied to actual engineering, weak soil layers often exist around a pile body after foundation pore forming, for example: a foundation consisting of silt, mucky soil, earth fill or other high-pressure earth layers. Under similar engineering geological conditions, on one hand, the problems of hole collapse, diameter shrinkage, pile hole deflection and the like easily occur in the construction process to influence the pouring of a pile foundation, and on the other hand, the engineering economy of the pouring pile is influenced by a soft soil layer and cannot be fully reflected. In the engineering, a post grouting mode is generally adopted to carry out secondary treatment on the weak stratum around the pile foundation, but the construction technology at present mainly comprises the steps of arranging a high-pressure grouting pipe inside a bored pile, and reinforcing the weak soil layers around the pile and at the bottom of the pile through the split grouting and the penetration grouting modes of a high-pressure grouting body. The grouting mode has high randomness, the actual grouting position of the grouting body is difficult to control, and a large amount of grouting body is wasted, so that the engineering cost is increased. In addition, the situation that the position is deviated often occurs in the traditional cast-in-place pile reinforcement cage lowering process, so that the problems of non-ideal pile foundation protection layer thickness and the like are caused. Therefore, a new post-grouting mode of pile foundation needs to be developed to solve the typical problems of uneven grouting liquid distribution of the pile bottom at the pile side and other pile foundation construction.
Disclosure of Invention
The invention aims to provide a combined post grouting device for a stable externally-hung cast-in-place pile, which not only can realize combined grouting of a pile side and a pile end, but also can fix a vertical grouting pipe through a grouting pipe fixing device, and can prevent the vertical grouting pipe from being disturbed or even falling off in the high-pressure grouting process, thereby realizing stable grouting of a pile bottom and a pile side of the cast-in-place pile.
The technical scheme of the invention is realized as follows:
the utility model provides a stable external cast-in-place pile unites back slip casting device, includes the steel reinforcement cage, be equipped with on the steel reinforcement cage to four perpendicular slip casting pipe go on spacing slip casting pipe fixing device, four perpendicular slip casting pipes evenly distributed along the outside of steel reinforcement cage;
the bottom of perpendicular slip casting pipe passes through screwed connection and stake side slip casting outlet pipe and stake end slip casting outlet pipe threaded connection in the cyclic annular box, the top of perpendicular slip casting pipe passes through the rubber connecting pipe and is connected with the slip casting device, the cyclic annular box passes through the connecting plate to be fixed on the transversely distributed reinforcing bar of steel reinforcement cage, stake side slip casting outlet pipe, stake end slip casting outlet pipe symmetrical arrangement are in the both sides of steel reinforcement cage.
Further, the grouting pipe fixing device comprises a steel ring and a claw assembly, wherein the steel ring is fixed on transversely distributed steel bars of the steel bar cage through a connecting steel plate;
the claw assembly comprises four groups of welding block assemblies which are uniformly distributed along the outer circumferential direction of the steel ring, each welding block assembly comprises a first welding block and a second welding block which are welded on the side face of the steel ring, and a fixed rotating shaft is arranged between the first welding block and the second welding block.
Further, the device also comprises a first movable claw and a second movable claw which are rotatably arranged on the fixed rotating upper semicircular structure;
the first movable claw and the second movable claw are provided with mutually matched locking ends at one end far away from the fixed rotating shaft, and the locking ends are fixed through screws.
Further, the first movable claw and the second movable claw can rotate along the fixed rotating shaft, and when the lock catch ends are fixed through screws, the circular inner wall formed by the first movable claw and the second movable claw is matched with one side face of the vertical grouting pipe, and the other side face of the vertical grouting pipe is abutted to the side faces of the first welding block and the second welding block.
Further, the diameter of the discharging section of the pile side grouting outlet pipe and the pile end grouting outlet pipe is smaller than that of the feeding section.
Further, rubber seals with cross openings are arranged at the outlets of the pile side grouting outlet pipe and the pile end grouting outlet pipe.
The beneficial effects of the invention are as follows:
1. the device is provided with the pile side grouting outlet pipe and the pile end grouting outlet pipe at the outer side of the reinforcement cage of the cast-in-place pile, and compared with the traditional technology, the device effectively avoids the problems of difficult grouting after the initial setting of the pile body concrete and grouting quality control. According to the actual distribution condition of the field weak soil layer, the aim of joint grouting of the pile end and the pile side can be effectively achieved, gaps between the reinforcement cage and the hole wall are filled after the externally-hung grouting device works, a lateral cement soil filling layer is generated, the effective diameter of a pile foundation is enlarged, and the bearing capacity of the tubular pile is comprehensively improved.
2. The diameter of the discharge section of the pile side grouting outlet pipe and the diameter of the pile end grouting outlet pipe in the annular box body are smaller than those of the feeding section, so that the grouting pressure of the outlet end can be improved in the grouting implementation process, and the splitting effect and the penetration effect of the grouting body on the soil body around the pile can be improved during grouting, so that high-efficiency grouting is realized. In addition, the rubber seals with cross openings are arranged at the outlets of the pile side grouting outlet pipe and the pile end grouting outlet pipe, so that the phenomenon that grouting efficiency is affected due to the fact that slurry flows back in the grouting process can be avoided.
3. The grouting pipe fixing device is arranged on the steel reinforcement cage, and the vertical grouting pipe can be firmly fixed around the steel reinforcement cage in a threaded connection mode of the vertical grouting pipe and the grouting pipe outlet, so that the grouting pipe is prevented from skewing or falling off during high-pressure grouting, and the actual grouting effect is prevented from being influenced. Simultaneously, the grouting device is supported on the hole wall, so that the effective centering effect of the position of the reinforcement cage can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a top view of a stabilized externally hung grouting device after combining with a cast-in-place pile;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a cross-sectional view taken along the direction B-B in FIG. 1;
FIG. 4 is a top view of the jaw assembly;
FIG. 5 is an enlarged view at C in FIG. 2;
FIG. 6 is an enlarged view of FIG. 2D;
fig. 7 is an enlarged view at E in fig. 3.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-7, a post-grouting device for combining a stable externally-hung cast-in-place pile according to an embodiment of the invention comprises a reinforcement cage 1, wherein grouting pipe fixing devices for limiting four vertical grouting pipes 2 are arranged on the reinforcement cage 1, the four vertical grouting pipes 2 are uniformly distributed along the outer side of the reinforcement cage 1, and the number of the grouting pipe fixing devices arranged along the height direction of the vertical grouting pipes 2 is determined according to the length of the reinforcement cage 1.
The bottom of perpendicular slip casting pipe 2 passes through screwed joint 4 and stake side slip casting outlet pipe 6 and stake end slip casting outlet pipe 7 threaded connection in the cyclic annular box 5, and the top of perpendicular slip casting pipe 2 passes through rubber connecting pipe 8 and is connected with slip casting device 9, and slip casting device 9 passes through the power cord and connects the power supply and work, and cyclic annular box 5 passes through the connecting plate to be fixed on the transversely distributed reinforcing bar of steel reinforcement cage 1, and stake side slip casting outlet pipe 6, stake end slip casting outlet pipe 7 symmetrical arrangement are in the both sides of steel reinforcement cage 1.
In one embodiment of the invention, the grouting pipe fixing device comprises a steel ring 10 and a claw assembly 3, wherein the steel ring 10 is fixed on transversely distributed steel bars of the steel reinforcement cage 1 through connecting steel plates; the claw assembly 3 comprises four groups of welding block assemblies uniformly arranged along the outer circumferential direction of the steel ring 10, each welding block assembly comprises a first welding block 3-2 and a second welding block 3-3 which are arranged on the side surface of the steel ring up and down, and a fixed rotating shaft 3-4 is arranged between the first welding block 3-2 and the second welding block 3-3.
In addition, a first movable claw 3-5 and a second movable claw 3-6 with semicircular structures are rotatably arranged on the fixed rotation 3-4; the first movable claw 3-5 and the second movable claw 3-6 are provided with mutually matched locking ends 3-7 at one end far away from the fixed rotating shaft 3-4, and the locking ends 3-7 are fixed through screws.
Specifically, the first movable claw 3-5 and the second movable claw 3-6 can rotate along the fixed rotating shaft 3-4, and when the locking end 3-7 is fixed through a screw, the circular inner wall formed by the first movable claw 3-5 and the second movable claw 3-6 is matched with one side face of the vertical grouting pipe 2, and the other side face of the vertical grouting pipe 2 is abutted with the side faces of the first welding block 3-2 and the second welding block 3-3, so that the vertical grouting pipe 2 is limited and fixed.
In one embodiment of the present invention, as shown in fig. 6 and 7, the diameter of the discharge section a of the pile side grouting outlet pipe 6 and the pile end grouting outlet pipe 7 is smaller than that of the feed section b, and the slurry flows from the large-diameter feed section b to the small-diameter section of the discharge section a, so that grouting pressures of the outlet ends of the pile side grouting outlet pipe 6 and the pile end grouting outlet pipe 7 can be increased, and the splitting effect and the penetrating effect of the slurry on soil around the pile during grouting can be obviously improved, thereby realizing high-efficiency grouting.
In one embodiment of the invention, the outlets of the pile side grouting outlet pipe 6 and the pile end grouting outlet pipe 7 are provided with cross-opening rubber seals, and the rubber seals can avoid the backflow of slurry in the grouting process and influence the grouting efficiency.
The installation steps are as follows:
1) Prefabricating three types of grouting pipes: the bottom end of the vertical grouting pipe 2 is screwed with the pile side grouting outlet pipe 6 and the pile end grouting outlet pipe 7 through the threaded interfaces 4;
2) Welding four claw assemblies 3 around the steel ring 10 to manufacture a grouting pipe fixing device 4;
3) The grouting pipe fixing device is vertically distributed according to the size of the steel reinforcement cage 1 and is fixed on transversely distributed steel bars of the steel reinforcement cage by using connecting steel plates, the annular box body 5 is arranged at the bottom of the steel reinforcement cage 1 and is also fixed on transversely distributed steel bars of the steel reinforcement cage 1 by using connecting steel plates;
4) The prefabricated vertical grouting pipe 2 passes through the claw assembly 3 of the grouting pipe fixing device and is screwed into the annular box body 5 through the threaded interface 6 at the lower part, and then the fixing screws are used for screwing the lock catches, so that the vertical grouting pipe 2 is fixed in the claw assembly 3.
The using steps are as follows: preparing before forming the bored pile, and placing and fixing a reinforcement cage which is prefabricated in advance and is fixed with a grouting device after the bored pile is fixed; pouring concrete to form piles; after the cast-in-place pile is formed for a period of time, post grouting is carried out, and the top end of the vertical grouting pipe 2 is connected with a grouting device 9 through a rubber connecting pipe 8; the grouting device 9 is connected with a power supply through a power line to supply power; judging whether to start the grouting device 9 to perform pile side grouting or start the grouting device 9 to perform pile end grouting according to the soil layer condition of the actual construction site, so as to realize solidification treatment of the pile end or the soft soil layer at the pile side; and realizing the post grouting construction of the whole cast-in-place pile.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The combined post grouting device for the stable externally-hung cast-in-place pile is characterized by comprising a reinforcement cage (1), wherein grouting pipe fixing devices for limiting four vertical grouting pipes (2) are arranged on the reinforcement cage (1), and the four vertical grouting pipes (2) are uniformly distributed along the outer side of the reinforcement cage (1);
the bottom of perpendicular slip casting pipe (2) is through screw joint (4) and stake side slip casting outlet pipe (6) and stake end slip casting outlet pipe (7) threaded connection in cyclic annular box (5), the top of perpendicular slip casting pipe (2) is connected with grouting device (9) through rubber connecting pipe (8), cyclic annular box (5) are fixed on the transversely distributed reinforcing bar of steel reinforcement cage (1) through the connecting plate, stake side slip casting outlet pipe (6), stake end slip casting outlet pipe (7) symmetrical arrangement are in the both sides of steel reinforcement cage (1).
2. The combined post grouting device for the stable externally-hung cast-in-place pile according to claim 1, wherein the grouting pipe fixing device comprises a steel ring (10) and a claw assembly (3), and the steel ring (10) is fixed on transversely distributed steel bars of a steel bar cage (1) through a connecting steel plate;
the claw assembly (3) comprises four groups of welding block assemblies which are uniformly distributed along the outer circumferential direction of the steel ring (10), each welding block assembly comprises a first welding block (3-2) and a second welding block (3-3) which are welded on the side face of the steel ring (10), and a fixed rotating shaft (3-4) is arranged between the first welding block (3-2) and the second welding block (3-3).
3. A combined post-grouting device for a stable externally hung cast-in-place pile as claimed in claim 2, further comprising a first movable jaw (3-5) and a second movable jaw (3-6) rotatably mounted on the fixed rotation (3-4) in a semicircular structure;
the first movable claw (3-5) and the second movable claw (3-6) are provided with mutually matched locking ends (3-7) at one end far away from the fixed rotating shaft (3-4), and the locking ends (3-7) are fixed through screws.
4. A combined post grouting device for a stable externally hung cast-in-place pile according to claim 3, wherein the first movable claw (3-5) and the second movable claw (3-6) can rotate along the fixed rotating shaft (3-4), and when the locking end (3-7) is fixed by a screw, the circular inner wall formed by the first movable claw (3-5) and the second movable claw (3-6) is matched with one side surface of the vertical grouting pipe (2), and the other side surface of the vertical grouting pipe (2) is abutted against the side surfaces of the first welding block (3-2) and the second welding block (3-3).
5. A stabilized externally hung cast-in-place pile combined post grouting device as claimed in any one of claims 1 to 4, wherein the diameter of the discharge section (a) of the pile side grouting outlet pipe (6) and the pile end grouting outlet pipe (7) is smaller than the diameter of the feed section (b).
6. The combined post grouting device for the stable externally hung cast-in-place pile according to claim 5, wherein the outlets of the pile side grouting outlet pipe (6) and the pile end grouting outlet pipe (7) are provided with rubber seals with cross openings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311543408.9A CN117779778A (en) | 2023-11-20 | 2023-11-20 | Stable externally-hung type grouting device after combined with cast-in-place pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311543408.9A CN117779778A (en) | 2023-11-20 | 2023-11-20 | Stable externally-hung type grouting device after combined with cast-in-place pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117779778A true CN117779778A (en) | 2024-03-29 |
Family
ID=90384092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311543408.9A Pending CN117779778A (en) | 2023-11-20 | 2023-11-20 | Stable externally-hung type grouting device after combined with cast-in-place pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117779778A (en) |
-
2023
- 2023-11-20 CN CN202311543408.9A patent/CN117779778A/en active Pending
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