CN214460276U - Be applied to mud jacking steel-pipe pile device of soft foundation - Google Patents
Be applied to mud jacking steel-pipe pile device of soft foundation Download PDFInfo
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- CN214460276U CN214460276U CN202023141080.2U CN202023141080U CN214460276U CN 214460276 U CN214460276 U CN 214460276U CN 202023141080 U CN202023141080 U CN 202023141080U CN 214460276 U CN214460276 U CN 214460276U
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Abstract
The utility model discloses a be applied to mud jacking steel-pipe pile device of soft ground, including the steel-pipe pile body, the steel-pipe pile body still includes grouting pump and defeated thick liquid pipe for the equal open-ended cavity in upper and lower both ends, steel-pipe pile body inside wall is equipped with many defeated thick liquid pipes, the grout inlet of defeated thick liquid pipe extends to the outside after passing steel-pipe pile body upper portion lateral wall, the grouting pump is connected with the grout inlet of defeated thick liquid pipe, is equipped with a plurality of grouting mouths on the every defeated thick liquid pipe respectively. Through set up many defeated thick liquid pipes in the piling bar is intraductal, it is effectual to the basic improvement of silty soil, silt matter, increases the compact degree of soil body, reduces liquefaction degree etc. and improved the bearing capacity of soil body, with low costs and green, can not produce the poison and the pollution to soil body on every side, easy operation, construction workability is higher.
Description
Technical Field
The utility model relates to a bridge engineering field, specific be applied to mud jacking steel-pipe pile device of soft ground that says so.
Background
With the rapid development of the economy of China, the construction of the traffic infrastructure is correspondingly and continuously advanced and developed. Bridges, as one type of traffic infrastructure, are also constantly being developed and widely used in the process of infrastructure. In the construction of a bridge having a complicated bridge shape such as a tied arch bridge, the steel pipe piles are often used as supports in the methods such as the push-out method and the support method. In the current civil engineering construction, the steel pipe pile has the advantages of strong bearing capacity, larger bending resistance and tensile resistance, good elasticity, capability of absorbing larger variable performance and convenience in manufacturing and construction, and is widely applied to bridges, harbor navigation and constructional engineering.
Although steel pipe piles are widely used due to their many advantages, steel pipe piles have disadvantages such as poor durability, high construction costs, and uneconomical performance, and when a weak foundation, on which an effective bearing layer cannot be formed, is faced with, the steel pipe piles cannot exert their original functions due to their large self-weight and small bearing surfaces, resulting in a series of problems such as large settlement and inclination. The effective bearing capacity and stability of the steel pipe pile when being applied to the soft foundation with main soil body components of silt and silt are improved, and the method is also an important problem to be solved. The traditional solution is that the defects of low technology, low economy, high construction cost and the like exist in the process of excavating on a large scale and replacing and filling the foundation, the length of the steel pipe pile is increased, and the like, so that the method is urgently needed to find the method which has a good improvement effect, is simple to construct, is low in cost and is environment-friendly, and can ensure that the bearing capacity of the steel pipe pile applied to the weak foundation can be effectively improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be applied to mud jacking steel-pipe pile device of weak ground, the device can guarantee that the stable in structure of steel-pipe pile and peripheral ground and steel-pipe pile do not take place to subside in a large number, promotes the bearing capacity of steel-pipe pile, effectively reduces its construction cost.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a be applied to mud jacking steel-pipe pile device of soft foundation, includes the steel-pipe pile body, the steel-pipe pile body still includes grouting pump and defeated thick liquid pipe for the equal open-ended cavity in upper and lower both ends, steel-pipe pile body inside wall is equipped with many defeated thick liquid pipes, the grout inlet of defeated thick liquid pipe extends to the outside after passing steel-pipe pile body upper portion lateral wall, grouting pump is connected with the grout inlet of defeated thick liquid pipe, is equipped with a plurality of grouting mouths on every defeated thick liquid pipe respectively.
Furthermore, the slurry conveying pipe is a vertical slurry conveying pipe, the vertical slurry conveying pipe is connected with the inner side wall of the pile body of the steel pipe pile through a plurality of supports, the vertical slurry conveying pipe is provided with at least one group of lateral slurry injecting ports, and the outlet end of the vertical slurry conveying pipe is provided with a bottom slurry injecting port.
Further, the lateral grouting opening comprises an inner lateral transverse grouting opening and an outer lateral transverse grouting opening, the inner lateral transverse grouting opening and the outer lateral transverse grouting opening are correspondingly arranged on two sides of the slurry conveying pipe, the outer lateral transverse grouting opening penetrates through the side wall of the iron pipe pile body and then extends to the outside of the iron pipe pile body, and the inner lateral transverse grouting opening and the outer lateral transverse grouting opening are communicated with each other in the inner cavity of the slurry conveying pipe.
Furthermore, the lateral grouting port and the bottom grouting port are respectively conical, and a plurality of slurry outlet holes capable of ensuring rapid and uniform slurry outlet are formed in conical surfaces of the lateral grouting port and the bottom grouting port.
Furthermore, the diameter of the pulp conveying pipe is 10cm-20cm, and the length of the pulp conveying pipe is 15m-20 m.
The utility model has the advantages that:
1. the utility model discloses a set up many defeated thick liquid pipes in the piling bar is intraductal, it is effectual to the basic improvement of silty soil, silt matter, increase the compact degree of the soil body, reduce liquefaction degree etc. and improved the bearing capacity of the soil body, with low costs and green, can not poison and pollute the soil body production on every side, easy operation, construction workability is higher.
2. The slurry can be injected into the interior and the exterior of the steel pipe pile simultaneously through the slurry conveying pipe, so that the interior and the exterior of the steel pipe pile are fixed through concrete concretions, the frictional resistance between the pile side of the steel pipe pile and the soil body and the bearing capacity of the soil body at the pile end are increased, the embedding and extruding effect of the foundation on the steel pipe pile is promoted, the stability of the steel pipe pile is increased, the large-scale settlement and the deviation of the steel pipe pile are avoided, the integrity of the pile body and the foundation is ensured, the bearing capacity of the steel pipe pile is improved, and the stable supporting force can be better provided in the bridge construction process.
3. The construction is relatively convenient, and the operation is simple. The protective layer protects the steel pipe pile from being damaged in construction, the utilization rate of the steel pipe pile is improved, and the economical efficiency and the benefit of engineering are improved.
Drawings
FIG. 1 is a diagram illustrating the usage of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic cross-sectional structure of the present invention;
FIG. 4 is a schematic view of the internal structure of the present invention;
fig. 5 is a detailed view of the grouting port on the grout pipe.
In the figure:
1-a steel pipe pile body; 2-vertical slurry conveying pipe; 3-inner lateral grouting port; 4-bottom end grouting port; 5-lateral transverse grouting port; 6-grouting pump; 7-concrete concreting; and 8-supporting by a slurry conveying pipe.
Detailed Description
The following detailed description of the grouting steel pipe pile device applied to a soft foundation of the present invention is made with reference to the accompanying drawings.
As shown in fig. 1 to 4, the utility model discloses a be applied to mud jacking steel-pipe pile device of soft ground, including steel-pipe pile body 1, steel-pipe pile body 1 is the equal open-ended cavity in upper and lower both ends, still includes grouting pump 6 and defeated thick liquid pipe, 1 inside wall of steel-pipe pile body is equipped with many defeated thick liquid pipes, and many defeated thick liquid pipes evenly arrange on the pile body inner wall, the grout inlet of defeated thick liquid pipe extends to the outside after passing steel-pipe pile body upper portion lateral wall, and the defeated thick liquid pipe can be provided power by one or several grouting pump 6, grouting pump 6 is connected with the grout inlet of defeated thick liquid pipe, is equipped with a plurality of grouting mouths on the every defeated thick liquid pipe respectively.
The slurry conveying pipe is a vertical slurry conveying pipe 2, the vertical slurry conveying pipe 2 is connected with the inner side wall of the steel pipe pile body 1 through a plurality of slurry conveying pipe supports 8, and the supports are used for fixing the slurry conveying pipe. As shown in fig. 5, the vertical slurry conveying pipe is provided with at least one group of lateral grouting ports, the corresponding group of lateral grouting ports are arranged according to the length of the slurry conveying pipe, the outlet end of the vertical slurry conveying pipe is provided with a bottom grouting port 4, and the lateral grouting ports and the bottom grouting port ensure that slurry can be uniformly and quickly injected into the inner cavity and the outer part of the steel pipe pile body.
The lateral grouting openings comprise an inner lateral grouting opening 3 and an outer lateral grouting opening 5, the inner lateral grouting opening and the outer lateral grouting opening are correspondingly arranged on two sides of the vertical grout conveying pipe 2, the outer lateral grouting opening penetrates through the side wall of the steel pipe pile body 1 and then extends to the outside of the steel pipe pile body 1, and the inner lateral grouting opening 3 and the outer lateral grouting opening 5 are communicated with each other in the inner cavity of the grout conveying pipe. The lateral grouting opening on the inner side can inject the slurry into the inner cavity of the steel pipe pile body, and the lateral grouting opening on the outer side can inject the slurry into the outer part of the steel pipe pile body, so that the slurry is injected into the inner part and the outer part of the steel pipe pile, and the mounting firmness of the steel pipe pile is improved.
The lateral grouting port and the bottom grouting port are respectively conical, and a plurality of slurry outlet holes capable of ensuring rapid and uniform slurry outlet are arranged on the conical surfaces of the lateral grouting port and the bottom grouting port.
The diameter of the vertical slurry conveying pipe 2 is 10cm-20cm, the length of the slurry conveying pipe is 15m-20m, the specific size is set according to implementation requirements, and the concrete size is not limited as long as uniform and rapid grouting can be achieved.
The manufacturing steps of the steel pipe pile are as follows:
1. 6-8 iron slurry conveying pipes which are 10-20 cm in diameter and are made of the same material and the length of which changes according to the length of the foundation into which the steel pipe pile is driven are welded on the inner wall of the existing steel pipe pile, the length of each slurry conveying pipe is about 15-20 m, and the steel pipe piles for grouting at the pile ends and the pile sides are evenly arranged at intervals.
2. Pipeline supporting facilities are welded on two sides of the slurry conveying pipe, the number of supports is determined according to the length of the slurry conveying pipe, and the supports are uniformly arranged at intervals of 5-8 m in the vertical direction.
3. And respectively drilling circular holes with the circle centers of which the diameters are 0.2m-0.5m on the same straight line and penetrate through the inner side and the outer side of the pile body by using drill bits at the corresponding positions which are 1.5m-2.5m away from the pile bottom of the steel pipe pile and 5.5m-6.5m away from the pile bottom.
4. The grouting pipe grouting opening is an iron conical grouting opening, grouting is connected with a grouting guide pipe, the diameter of a grouting cone is 0.2-0.45 m, a position 0.5m away from the pile end of the grouting pipe is provided with a transverse branch pipe which penetrates through a round opening and is connected with the transverse conical grouting opening and a conical grouting opening which is transversely arranged and extends towards the inner side of the steel pipe pile, and the grouting pipe is used for spraying cement concrete slurry into a peripheral foundation and a soil body in the pile, the cement concrete slurry forms a concrete consolidation 7, and the frictional resistance between the pile side of the steel pipe pile and the soil body and the bearing capacity of the soil body at the pile end are increased.
5. After the installation is finished, a pump machine is used for pumping high-pressure water flow to detect whether the slurry conveying pipe and the grouting opening can work normally or not, and if the slurry conveying pipe and the grouting opening cannot work normally, corresponding adjustment is needed.
The construction process of the grouting steel pipe pile device applied to the soft foundation comprises the following steps:
1. clearing and leveling the roadbed, and removing the original structure; the method comprises the steps of cleaning an original roadbed and then dismantling large-scale structures on the original roadbed.
2. Tamping a substrate, leveling by using a road roller, bulldozing from the middle to two sides of an area needing piling for 2-3 times, and compacting by adopting a 25KJ impact road roller for 5-15 times after basically leveling.
3. And after the ground is leveled, erecting the steel pipe pile of the piling equipment and supporting facilities thereof. And (4) carrying out related inspection and treatment on the steel pipe pile before piling.
Before piling, the firmness degree of the connection and installation of the vertical slurry conveying pipe, the grouting opening and the pile body is checked, and the phenomena of falling off and the like in the piling process are avoided.
Before piling, quick-drying water-soluble gel is filled into each grouting opening, so that the gel is filled into the grouting openings, the grouting openings are completely plugged after the gel is solidified, the influence of a soil plug effect on the grouting process is avoided, the grouting operation cannot be completed, and the gel can be dissolved in the grouting operation process without influencing the construction.
4. And (3) driving the steel pipe pile into the ground by a pile driver, namely driving the steel pipe pile into the foundation by a 180t drop hammer type pile driver when the direction of the steel pipe pile is basically vertical, and driving the steel pipe pile into the foundation by 10-15 m according to engineering requirements.
5. And (3) performing grouting operation, namely pumping concrete slurry by using a high-pressure pump and a slurry conveying pipe for grouting, grouting concrete into soil bodies inside and outside the steel pipe pile through a vertically-arranged grouting opening and horizontally-arranged inner and outer grouting pipes, and controlling factors such as grouting amount and grouting pressure during grouting because the surrounding soil bodies are relatively soft and mainly comprise silt and sludge. The pile side grouting amount and grouting pressure are controlled within the range of 0.4-0.8Mpa, the grouting speed is 0.8-1.0L/S, and the grouting pressure stabilizing time is 25-30 min.
6. And (5) concrete curing for 3d-7d, after grouting operation is finished, performing concrete curing for 3d-7d, and cleaning machines.
7. Detecting and accepting, and if the bearing capacity requirement is not met, grouting again; and if the requirements are met, carrying out the construction of the upper structure of the bridge.
The utility model discloses a device is effectual to the basic improvement of silty soil, silt matter, increases the compact degree of the soil body, reduces liquefaction degree etc. and has improved the bearing capacity of the soil body, and with low costs and green can not poison and pollute the soil body production on every side, easy operation, and construction workability is higher.
The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.
Other technical features than those described in the specification are known to those skilled in the art.
Claims (5)
1. The utility model provides a be applied to mud jacking steel-pipe pile device of soft foundation, includes the steel-pipe pile body, the steel-pipe pile body is the equal open-ended cavity in both ends from top to bottom, characterized by still includes grouting pump and defeated thick liquid pipe, steel-pipe pile body inside wall is equipped with many defeated thick liquid pipes, the grout inlet of defeated thick liquid pipe extends to the outside after passing steel-pipe pile body upper portion lateral wall, grouting pump is connected with the grout inlet of defeated thick liquid pipe, is equipped with a plurality of grouting openings on every defeated thick liquid pipe respectively.
2. The grouting steel pipe pile device applied to the soft foundation according to claim 1, wherein the grouting pipe is a vertical grouting pipe, the vertical grouting pipe is connected with the inner side wall of the pile body of the steel pipe pile through a plurality of supports, the vertical grouting pipe is provided with at least one group of lateral grouting ports, and the outlet end of the vertical grouting pipe is provided with a bottom grouting port.
3. The grouting steel pipe pile device applied to the soft foundation according to claim 2, wherein the lateral grouting ports comprise an inner lateral grouting port and an outer lateral grouting port, the inner lateral grouting port and the outer lateral grouting port are correspondingly arranged on two sides of the grouting pipe, the outer lateral grouting port penetrates through the side wall of the iron pipe pile body and then extends to the outside of the iron pipe pile body, and the inner lateral grouting port and the outer lateral grouting port are communicated with each other in the inner cavity of the grouting pipe.
4. The apparatus as claimed in claim 2, wherein the lateral and bottom grouting ports are tapered, and a plurality of grout outlet holes for fast and uniform grout outlet are formed on tapered surfaces of the lateral and bottom grouting ports.
5. The apparatus of claim 1, wherein the diameter of the slurry pipe is 10cm to 20cm, and the length of the slurry pipe is 15m to 20 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023141080.2U CN214460276U (en) | 2020-12-23 | 2020-12-23 | Be applied to mud jacking steel-pipe pile device of soft foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023141080.2U CN214460276U (en) | 2020-12-23 | 2020-12-23 | Be applied to mud jacking steel-pipe pile device of soft foundation |
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| CN214460276U true CN214460276U (en) | 2021-10-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114032901A (en) * | 2021-11-26 | 2022-02-11 | 中交四航工程研究院有限公司 | Device for improving construction efficiency of open pile and construction method |
| CN114411745A (en) * | 2022-02-25 | 2022-04-29 | 上海同人里岩土工程技术有限公司 | Post-grouting device for pile end of steel pipe pile and construction method thereof |
| CN115852943A (en) * | 2022-12-14 | 2023-03-28 | 上海建工集团股份有限公司 | Open steel pipe pile and construction method |
-
2020
- 2020-12-23 CN CN202023141080.2U patent/CN214460276U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114032901A (en) * | 2021-11-26 | 2022-02-11 | 中交四航工程研究院有限公司 | Device for improving construction efficiency of open pile and construction method |
| CN114411745A (en) * | 2022-02-25 | 2022-04-29 | 上海同人里岩土工程技术有限公司 | Post-grouting device for pile end of steel pipe pile and construction method thereof |
| CN115852943A (en) * | 2022-12-14 | 2023-03-28 | 上海建工集团股份有限公司 | Open steel pipe pile and construction method |
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