CN215406039U - Core hole slip casting reinforced structure is got to bridge pile foundation - Google Patents
Core hole slip casting reinforced structure is got to bridge pile foundation Download PDFInfo
- Publication number
- CN215406039U CN215406039U CN202122090028.7U CN202122090028U CN215406039U CN 215406039 U CN215406039 U CN 215406039U CN 202122090028 U CN202122090028 U CN 202122090028U CN 215406039 U CN215406039 U CN 215406039U
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- Prior art keywords
- grouting
- pile foundation
- hole
- slip casting
- reinforcement structure
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- 238000007569 slipcasting Methods 0.000 title abstract description 15
- 230000002787 reinforcement Effects 0.000 claims abstract description 20
- 238000013016 damping Methods 0.000 claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 18
- 239000002689 soil Substances 0.000 claims abstract description 17
- 239000006052 feed supplement Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims description 13
- 239000011440 grout Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 21
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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Landscapes
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a core taking hole grouting reinforcement structure for a bridge pile foundation, which is used for solving the problem of low compactness caused by adopting one-time grouting in the existing core taking hole grouting reinforcement structure. Coring hole in the concrete pile foundation, and this coring hole runs through in the concrete pile foundation extends to the soil layer of below, and coring the hole below form in the soil layer and have expanded secondary grout district, and the damping packer is once gravity slip casting district and secondary pressurization slip casting district with upper space and lower part space division, and circulation feed supplement device makes circulation feed supplement pump, slip casting pipe, secondary pressurization slip casting district and exhaust to form the circulation pressurization pipeline between the slip casting pipe through connecting including circulation feed supplement pump and slip casting pipe, exhaust. According to the utility model, the core taking hole is secondarily reinforced by arranging the damping packer in a way of matching primary grouting and secondary pressurized grouting, so that the stress area and the force bearing condition of the bottom of the bridge pile foundation are greatly improved.
Description
Technical Field
The utility model relates to the technical field of bridge concrete pile foundation reinforcement, in particular to a technology for grouting reinforcement of a formed circular hole after coring of a pile foundation.
Background
The technology for grouting and reinforcing the formed round hole after coring of the pile foundation refers to the technical process of performing pressure grouting on the hole by using a grouting pipe and grouting equipment in pile foundation construction. This in-process, the slip casting process refers to fig. 1 and shows, in fig. 1, pre-set a length, two short PVC slip casting pipes through the male mode in coring the circular hole, promptly, long slip casting pipe and short exhaust mud pipe, press-cast cement mortar to the slip casting pipe through the slip casting machine for cement mortar is progressively filled up, is filled up coring the circular hole, at this in-process, need set up the sealing plug through the top at coring the circular hole, so that form effectual slip casting space.
The technical problems of the traditional grouting method are as follows:
firstly, the grouting compactness in the coring circular hole is low, the void ratio is high, local cavities are easily caused, and no remedial measure is provided after the grouting slurry is completely hardened.
Secondly, the grouting mode in fig. 1 has low grouting efficiency, and in the grouting process, the grout flows from the lowest end of the grouting pipe to the top, the flowing line of the grout is long, and the grouting efficiency is low.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a core taking hole grouting reinforcement structure for a bridge pile foundation, which is used for solving the problem of low compactness caused by adopting one-time grouting in the existing core taking hole grouting reinforcement structure.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a core hole grouting reinforcement structure for a bridge pile foundation comprises a concrete pile foundation arranged in a soil layer and a core hole arranged in the concrete pile foundation, wherein the core hole penetrates through the concrete pile foundation and extends into the soil layer below the concrete pile foundation, and an expanded secondary grouting area is formed in the soil layer below the core hole,
also comprises a damping packer and a circulating feeding device, wherein,
the damping packer is arranged in a coring hole close to the lower end position of a concrete pile base, the damping packer divides an upper space and a lower space into a primary gravity grouting area and a secondary pressurization grouting area, and the grouting density in the secondary pressurization grouting area is greater than the grouting density in the primary gravity grouting area;
the circulation feed supplement device comprises a circulation feed supplement pump, a grouting pipe and an exhaust slurry discharge pipe, and a circulation pressurization pipeline is formed among the circulation feed supplement pump, the grouting pipe, the secondary pressurization grouting area and the exhaust slurry discharge pipe through connection.
And the primary gravity grouting area is grouted by a gravity method and cured and hardened.
And the secondary pressure grouting area is grouted by a pressure grouting method and cured and hardened.
In the secondary pressure grouting process, the grouting pressure is 2 Mpa.
The damping packer is provided with a piston part which is provided with a cylindrical structure with a skirt part, and a channel for the grouting pipe and the exhaust slurry discharging pipe to penetrate is arranged on a top cover plate of the piston part.
The lower end of the skirt has support legs extending to the bottom of the secondary pressurized grouting zone.
Gate valves are arranged on the positions above the ground of the grouting pipe and the exhaust and slurry discharge pipe.
The utility model has the beneficial effects that: according to the utility model, the circular hole space is divided into two parts by arranging the damping packer, the upper part of the circular hole space is of an open structure and is a primary gravity grouting area, the lower part of the circular hole space is a closed space and is marked as a secondary pressurized grouting area, and the coring hole is secondarily reinforced by matching with the primary grouting and the secondary pressurized grouting, so that the grouting density of the secondary pressurized grouting area is obviously improved, and the stress area and the force bearing condition of the bottom of the bridge pile foundation are greatly improved.
Drawings
Fig. 1 is a schematic view of grouting reinforcement in the prior art.
FIG. 2 shows a first step of the process of the present invention.
FIG. 3 shows step two of the process of the present invention.
FIG. 4 shows a third step of the process of the present invention.
FIG. 5 is a perspective view of a damping packer.
In the figure:
10 damping packers, 11 piston parts, 12 support legs,
20 a grouting pipe is arranged on the lower portion of the main body,
30 of a gas-discharging and slurry-discharging pipe,
a 40-cycle feeding pump is arranged on the feeding device,
00 concrete pile foundation, 00' soil layer,
01 primary gravity grouting area, 02 secondary pressure grouting area, 03 holes and 04 secondary grouting reinforcement area.
Detailed Description
The concrete pile foundation 00 is an important component in a bridge, the pile foundation grouting principle is that slurry is uniformly injected into a pile body through a grouting pipe, the slurry occupies the position of a soil particle or a rock-soil crack after removing moisture and air in the soil particle or the rock-soil crack in the modes of filling, permeating, squeezing and the like, and the slurry is used for cementing the original loose soil particle or crack into a whole after being manually controlled for a certain time. Belonging to a branch of reinforcement technology.
The problem that this embodiment will solve is, in the back slip casting reinforcement work progress of concrete pile foundation 00, first-selected need get the core at the vertical drilling of the central position of concrete pile foundation, form the vertical hole 03 of a round hole, this hole pierces through the concrete pile foundation completely, and extend to concrete pile foundation 00 below at least, carry out the reaming through the mode of secondary machinery reaming or hydraulic flow impact, make the below formation of this coring hole expand, the secondary grouting reinforcement area 04 of hole, refer to figure 2.
The conventional method of grouting a secondary grouting reinforcement area by using a gravity method has a technical defect of low grouting density, and referring to fig. 1, the present embodiment is technically innovative based on this problem.
Referring to fig. 2 to 5, the implementation of the technology will be described with reference to the drawings of the specification, first, a special damping packer 10 is pressed into a coring circular hole by means of mechanical stuffing, the damping packer is located near the lower end of a pile and in a concrete pile foundation 00, the damping packer divides the inner space into two parts, the upper part is an open structure and is a primary gravity grouting area 01, the lower part is a closed space and is marked as a secondary pressurization grouting area 02, and then a grouting pipe 20 and an exhaust and discharge pipe 30 are implanted.
As a specific structural style, the damping packer 10 adopts a steel component, and particularly comprises a piston part 11 and a supporting leg part 12, wherein the piston part 11 is a punched cylindrical structure with a skirt part, and three supporting legs are welded at the lower end of the skirt part to form the supporting leg part 12. The top cover plate of the piston part is provided with two round holes which are respectively used for connecting the grouting pipe 20 and the exhaust and slurry discharge pipe 30 and are through passages of two pipes. The embodiment only describes a simple implementation manner of the damping packer, and does not limit the structure of the damping packer, and in the evolution process outside the embodiment, various structures can be formed, and similar structures are also within the protection scope of the utility model.
The grouting is divided into two processes, the first process is to fill the cylindrical space of the primary gravity grouting area with concrete mortar of common specification, the grouting mode is a gravity method, and the grouting operation of the primary gravity grouting area can be completed by static curing and hardening, referring to fig. 3. This is consistent with the conventional gravity grouting operation, see fig. 1.
In the second process, high-density grouting mortar is used and matched with an external circulating feed supplement pump to carry out high-density grouting mortar construction on the secondary pressurized grouting area, the process is pressurized grouting, in the process, a large circulation loop is formed among a grouting pipe, a secondary pressurized grouting area and an exhaust and discharge pipe by a circulating supplement pump, high-density grouting mortar (fluid) is continuously filled along the weakest direction of the existing secondary pressurized grouting area, and forming internal expansive force on the weakest soil layer in the space, basically filling the holes of the foundation soil layer 00' around the space step by step after pressure maintaining and circulation for half an hour, finally completely filling the foundation soil layer in a certain range around the secondary pressure grouting area by high-density grouting mortar, referring to figure 4, after pressure maintaining and maintenance, the circulating supplement pump 40 is removed until the hardening is completed, referring to fig. 5, thereby effectively improving the bearing capacity of the foundation.
In the secondary pressure grouting process, the grouting pressure is 2Mpa, and the concrete in the primary gravity grouting area at the upper part is already hardened, so that the grouting pressure is favorably maintained.
The above circulation pipeline may be provided with a gate valve, specifically, the gate valve is arranged above the ground of the grouting pipe and the exhaust and slurry discharge pipe, and the arrangement of the gate valve is beneficial to maintaining the grouting pressure in the secondary pressurized grouting area.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the scope of the present invention, and various modifications and improvements of the present invention by those skilled in the art without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.
Claims (7)
1. A core hole grouting reinforcement structure for a bridge pile foundation comprises a concrete pile foundation arranged in a soil layer and a core hole arranged in the concrete pile foundation, wherein the core hole penetrates through the concrete pile foundation and extends into the soil layer below the concrete pile foundation, and an expanded secondary grouting area is formed in the soil layer below the core hole,
also comprises a damping packer and a circulating feeding device, wherein,
the damping packer is arranged in a coring hole close to the lower end position of a concrete pile base, the damping packer divides an upper space and a lower space into a primary gravity grouting area and a secondary pressurization grouting area, and the grouting density in the secondary pressurization grouting area is greater than the grouting density in the primary gravity grouting area;
the circulation feed supplement device comprises a circulation feed supplement pump, a grouting pipe and an exhaust slurry discharge pipe, and a circulation pressurization pipeline is formed among the circulation feed supplement pump, the grouting pipe, the secondary pressurization grouting area and the exhaust slurry discharge pipe through connection.
2. The bridge pile foundation coring hole grouting reinforcement structure of claim 1, wherein the primary gravity grouting zone is gravity grouted and cured.
3. The coring hole grouting reinforcement structure for a bridge pile foundation of claim 2, wherein the secondary pressurized grouting zone is grouted and cured by pressurized grouting.
4. The coring hole grouting reinforcement structure for a bridge pile foundation as claimed in claim 3, wherein the grouting pressure is 2Mpa during the secondary pressure grouting.
5. A bridge pile foundation coring hole grouting reinforcement structure as claimed in claim 1, wherein the damping packer has a piston portion and a cover plate, the piston portion is a cylindrical structure with a skirt, and the cover plate is provided with a passage through which a grouting pipe and an exhaust and slurry discharge pipe are inserted.
6. The bridge pile foundation coring hole grouting reinforcement structure of claim 5, wherein the lower end of the skirt has support legs.
7. The coring hole grouting reinforcement structure for a bridge pile foundation as claimed in claim 1, wherein gate valves are provided at positions above the ground of the grouting pipe and the exhaust and discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122090028.7U CN215406039U (en) | 2021-08-31 | 2021-08-31 | Core hole slip casting reinforced structure is got to bridge pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122090028.7U CN215406039U (en) | 2021-08-31 | 2021-08-31 | Core hole slip casting reinforced structure is got to bridge pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215406039U true CN215406039U (en) | 2022-01-04 |
Family
ID=79664702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122090028.7U Expired - Fee Related CN215406039U (en) | 2021-08-31 | 2021-08-31 | Core hole slip casting reinforced structure is got to bridge pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215406039U (en) |
-
2021
- 2021-08-31 CN CN202122090028.7U patent/CN215406039U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220104 |
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| CF01 | Termination of patent right due to non-payment of annual fee |