CN111501761A - Offshore steel pipe pile distributed post-grouting device, pneumatic grouting assembly and construction method - Google Patents
Offshore steel pipe pile distributed post-grouting device, pneumatic grouting assembly and construction method Download PDFInfo
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- CN111501761A CN111501761A CN202010380772.8A CN202010380772A CN111501761A CN 111501761 A CN111501761 A CN 111501761A CN 202010380772 A CN202010380772 A CN 202010380772A CN 111501761 A CN111501761 A CN 111501761A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
Abstract
The invention discloses a distributed post-grouting device for an offshore steel pipe pile, an air-type grouting assembly and a construction method, wherein the air-type grouting assembly comprises a grouting pipe, square rubber airbags, an upper air pipe and a lower air pipe, the grouting pipe is placed in a vertical square grouting channel, the square rubber airbags are vertically and alternately coated on the outer side of the grouting pipe, the upper air pipe is connected with the square rubber airbag at the upper end and used for inflating the square rubber airbag, the lower air pipe is connected with the square rubber airbag at the lower end and used for inflating the square rubber airbag, and a plurality of grout outlets are uniformly distributed on the outer side surfaces of the square rubber airbags at the upper end and the lower end of the grouting pipe; the square rubber air bags are full under the action of external air pressure, and the square rubber air bags at the upper end and the lower end in a sufficient air state and the inner wall of the vertical square grouting channel form a local closed space. The pneumatic grouting component of the invention utilizes the square rubber air bags arranged up and down in a sufficient air state and the inner wall of the vertical square grouting channel to form a closed space, thereby realizing grouting at a local position in the vertical square grouting channel.
Description
Technical Field
The invention relates to a grouting device in the field of civil engineering, in particular to a distributed post-grouting device and an air type grouting assembly for an offshore steel pipe pile and a construction method.
Background
The steel pipe pile is widely applied to ocean and offshore engineering such as a cross-sea bridge, a port and a wharf, an offshore oil platform, an offshore wind turbine and the like due to the characteristics of high bearing capacity, good flexibility, high construction speed and the like, and develops into an important basic form of a building (structure) on water. However, many problems are often encountered in the construction and use process of the steel pipe pile, and particularly, the large-diameter ultra-long steel pipe pile mainly comprises: the effective stress of the soil body on the pile side is reduced due to extrusion disturbance in the pile sinking process; repeated cycling of pile sinking load causes fatigue degradation of side resistance; the penetration into special soil is easy to cause cementation damage and particle breakage of soil body, so that the side friction resistance of the pile body and the pile end resistance can not be effectively exerted. These problems may adversely affect the bearing performance of the steel pipe pile, and the post-grouting technique can improve the above problems, increase the ultimate bearing capacity of the pile foundation, and reduce the settling volume, so that the technique has been widely applied and developed in recent years.
However, due to the problems of large section space, low grouting hole plugging rate, uneven slurry distribution and the like of the existing pile side rear grouting device, the injected slurry cannot cover the whole range of the pile body, and a pile-soil system cannot effectively form a system working in a close cooperation manner; meanwhile, the existing pile end and pile side post-grouting devices are mutually independent, so that the grouting pipeline is complex, the problems of grouting pipeline disorder, pressure leakage and the like in the construction process are easy to occur, and the post-grouting often cannot achieve the required effect. Therefore, how to solve the problems is the key for effectively improving the pile end resistance and the pile side frictional resistance, so that the post grouting technology is more reasonable.
Therefore, it is desired to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an air type grouting assembly capable of regulating and controlling grouting reinforcement range in a vertical square grouting channel so as to realize local grouting.
The second purpose of the invention is to provide a marine steel pipe pile distributed post-grouting device based on an air-type grouting component, which can be used for solving the problems that the pressed grout cannot cover along the whole range of a pile body and a pile-soil system cannot effectively form a close cooperative work system, and is used for improving the bearing performance of a steel pipe pile, reducing the settlement amount of a foundation pile and greatly reducing the cost.
The third purpose of the invention is to provide a construction method of the offshore steel pipe pile distributed post-grouting device.
The technical scheme is as follows: in order to achieve the purpose, the invention discloses an air type mud jacking assembly, which comprises a mud jacking pipe, square rubber air bags, an upper air pipe and a lower air pipe, wherein the mud jacking pipe is used for being placed in a vertical square mud jacking channel; the square rubber air bags are full under the action of external air pressure, and the square rubber air bags at the upper end and the lower end in a sufficient air state and the inner wall of the vertical square grouting channel form a local closed space.
Wherein, the upper and lower both ends of the square rubber gasbag that are located the mud jacking pipe upper end are equipped with the last fixation clamp that is used for pressing from both sides the square rubber gasbag tightly.
Preferably, the upper end and the lower end of the square rubber air bag positioned at the lower end of the grouting pipe are provided with lower fixing clamps for clamping the square rubber air bag.
Furthermore, a grouting device is connected to the grouting pipe.
The invention relates to an offshore steel pipe pile distributed post grouting device based on an air type grouting component, which comprises a steel pipe pile, steel grooves, a steel plate, an air type grouting component and a lifting positioning device, wherein the steel grooves are uniformly distributed on the periphery of the outer wall of the steel pipe pile and are provided with a plurality of grouting holes; the square rubber air bag of the pneumatic type mud jacking component and the inner wall of the steel groove form a closed space for jacking under a sufficient air state.
Wherein, the lifting and positioning device is a gantry type lifter.
Preferably, grout pressing holes are sequentially formed in the three side faces of the steel groove from bottom to top, and the distance between every two adjacent grout pressing holes is 1-3 m.
Furthermore, an anti-blocking piece is arranged in the mud jacking hole.
Further, the anti-blocking piece is a strong magnetic button.
The invention discloses a construction method of a distributed post grouting device of an offshore steel pipe pile, which is characterized by comprising the following steps of:
(1) slurry pressing holes are formed in three side surfaces of the steel tank from bottom to top at intervals of 1-3 m in sequence, an opening in the bottom of the steel tank is sealed by a steel plate with the slurry pressing holes, and the slurry pressing holes are sealed by anti-blocking pieces with the same size;
(2) when the steel pipe pile is in a horizontal state, uniformly distributing the steel grooves plugged with the steel plates around the outer side wall of the steel pipe pile, and sealing the bottom openings of the steel grooves by adopting the same thick steel plates;
(3) hoisting the steel pipe pile to a pile position, and performing pile sinking operation;
(4) placing an air type grouting component in each steel groove through a lifting positioning device, and conveying the air type grouting component to the bottom of each steel groove, wherein the air type grouting component in each steel groove is positioned at the same elevation;
(5) the square rubber air bag at the upper end is inflated through the upper air pipe, and meanwhile, the square rubber air bag at the lower end is not inflated until the square rubber air bag and the inner wall of the steel groove form a closed space for grouting in a sufficient air state; grouting into the grouting pipe by using grouting equipment, enabling the grout to flow into the grouting pipe and flow into the closed space through a grout outlet on the grouting pipe, flushing the anti-blocking piece by the grout in the closed space, and then flowing to the outer side of the steel pipe pile through a grouting hole to perform grouting on the pile end position; synchronously grouting the pile end position in each steel groove, and finishing pile end grouting when the grouting amount reaches a pre-estimated value and the grouting pressure meets the requirement;
(6) pumping the gas in the square rubber air bag at the upper end through the upper air pipe, and decompressing the square rubber air bag at the upper end; the pneumatic grouting component is moved upwards to the position of the next grouting hole through the lifting positioning device, and the pneumatic grouting component in each steel groove is located at the same elevation;
(7) the upper air pipe is used for inflating the square rubber air bag at the upper end, and the lower air pipe is used for inflating the square rubber air bag at the lower end until the square rubber air bag and the inner wall of the steel groove form a closed space for grouting in a state that the upper end and the lower end are full;
(8) grouting into the grouting pipe by using grouting equipment, enabling the grout to flow into the grouting pipe and flow into the closed space through a grout outlet on the grouting pipe, flushing the anti-blocking piece by the grout in the closed space, and then flowing to the outer side of the steel pipe pile through a grouting hole to perform grouting on the lateral position of the pile; synchronously grouting the same section of the steel pipe pile in each steel groove, and finishing pile side grouting of the same section when grouting amount reaches a predicted value and grouting pressure meets requirements;
(9) the air in the square rubber air bag at the upper end is pumped away through the upper air pipe, and the air in the square rubber air bag at the lower end is pumped away through the lower air pipe, so that the pressure of the square rubber air bag is relieved; sequentially moving the pneumatic grouting component to the position of the next grouting hole from bottom to top by the lifting positioning device; and (5) repeating the steps (7) and (8) until the pile-forming grouting is completed.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) the pneumatic grouting component forms a closed space by utilizing the square rubber airbags arranged up and down in a sufficient air state and the inner wall of the vertical square grouting channel, realizes grouting at a local position in the vertical square grouting channel, and can regulate and control the grouting reinforcement range in the vertical square grouting channel;
(2) according to the offshore steel pipe pile distributed post-grouting device, the square rubber air bags arranged up and down in the air type grouting component and the inner wall of the steel groove form a closed space for grouting in a sufficient air state, grouting at a local position in the vertical steel groove is achieved, the air type grouting component is sequentially lifted to be at a required grouting position by the lifting and positioning device, the grouting reinforcement range in the steel groove is adjusted, fixed-point quantitative controllable grouting is achieved, and the expected effect of post-grouting at the pile end on the pile side is achieved;
(3) according to the invention, the air type mud jacking component is arranged in the steel groove of the steel pipe pile, so that sequential local mud jacking is realized, the problems that grout injected at the pile end at the pile side cannot cover the whole range of the pile body and a pile-soil system cannot effectively form a compact cooperative work system are solved, effective bonding and load transfer between the steel pipe pile and the soil body are realized, and the effects of improving the bearing performance of the steel pipe pile, reducing the settling amount of a foundation pile and reducing the cost are achieved;
(4) the anti-blocking piece is arranged on the grouting hole, so that the pipe is not blocked in the grouting process, and the grouting success rate is improved;
(5) the implementation method of the invention can obviously improve the horizontal bearing capacity of the steel pipe pile, effectively control the horizontal displacement and greatly reduce the cost; the construction method of distributed post grouting solves the problem that the side friction resistance and the end resistance of the pile are greatly reduced in the construction process of the steel pipe pile, so that the bearing capacity of the steel pipe pile is obviously improved;
(6) the offshore steel pipe pile distributed post-grouting device is economical and applicable, is suitable for being installed on a construction site, is convenient to popularize and apply, is simple in material taking, can be installed and used by professional technicians on the construction site, is synchronous with a pile forming process, can effectively save the engineering progress, and is convenient to popularize and use.
Drawings
FIG. 1 is a plan view showing the connection of a steel pipe pile and a steel channel according to the present invention;
FIG. 2 is a vertical sectional view showing the connection of a steel pipe pile and a steel channel in the present invention;
FIG. 3 is a sectional view showing the connection of a steel pipe pile and a steel channel in the present invention;
FIG. 4 is a schematic structural diagram of the offshore steel pipe pile distributed post-grouting device in the invention;
FIG. 5 is a schematic structural view of an air grouting assembly according to the present invention;
FIG. 6 is a schematic view of the grouting state in the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 5, the pneumatic type grouting assembly of the invention comprises a grouting pipe 1, a square rubber air bag 2, an upper air pipe 3, a lower air pipe 4, a grout outlet 5, an upper fixing clamp 6 and a lower fixing clamp 7. The two square rubber airbags 2 are coated outside the grouting pipe 1 at intervals from top to bottom, the upper end and the lower end of the square rubber airbag 2 at the upper end are fixedly clamped on the grouting pipe 1 through the upper fixing clamp 6, and the upper end and the lower end of the square rubber airbag 2 at the lower end are fixedly clamped on the grouting pipe 1 through the lower fixing clamp 7.
Go up trachea 3 and the square rubber gasbag 2 of upper end and be connected and aerify for square rubber gasbag 2, lower trachea 4 is connected with the square rubber gasbag 2 of lower extreme and aerifys for square rubber gasbag 2, goes up trachea 3 and lower trachea 4 and all communicates to ground, is convenient for aerify and bleed. The outer side surfaces of the square rubber air bags at the upper end and the lower end of the grouting pipe 1 are uniformly provided with a plurality of grout outlets 5, external air pressure respectively inflates the two square rubber air bags 2 through an upper air pipe 3 and a lower air pipe 4, so that the square rubber air bags 2 are in a sufficient air state, and the square rubber air bags 2 and the inner wall of the vertical square grouting channel form a local closed space in the sufficient air state; the grout enters the grouting pipe 1 and flows into the local closed space from the grout outlet 5, so that the local grouting in the local closed space is realized.
As shown in fig. 4, the offshore steel pipe pile distributed post-grouting device based on the pneumatic grouting component comprises a steel pipe pile 8, a steel groove 10 with grouting holes 9, a steel plate 11 with grouting holes 9, the pneumatic grouting component, a lifting positioning device 12, grouting equipment 13 and an anti-blocking piece 14. As shown in figures 1, 2 and 3, the steel pipe pile is symmetrically and uniformly distributed around the outer side of the steel pipe pile, the mud jacking holes 9 are sequentially distributed on three side surfaces of the steel pipe pile 10 from bottom to top, the distance between the upper and lower adjacent mud jacking holes 9 is 1-3 m, and the diameter of the mud jacking holes is 8-10 mm. The mud jacking hole 9 is internally provided with an anti-blocking piece 14, the anti-blocking piece 14 is a strong magnetic button, and the anti-blocking piece 14 is used for preventing concrete grout and soil body particles from blocking the mud jacking hole in the pile forming process. The pneumatic grouting component is placed in the steel groove 10, and a vertical square grouting channel is formed in the steel groove 10. The lifting positioning device adopts a gantry crane, the gantry crane is used for driving the air type grouting component to move up and down along the steel groove, the grouting equipment 13 is connected with the grouting pipe 1 of the air type grouting component, and grouting liquid is pressed in the grouting pipe 1. The lifting positioning device lowers the pneumatic grouting component to a designated grouting hole 9 in the steel tank 10, external air pressure respectively inflates the two square rubber air bags 2 through the upper air pipe 3 and the lower air pipe 4, so that the square rubber air bags 2 are in a sufficient air state, and the square rubber air bags 2 in the sufficient air state and the inner wall of a vertical square grouting channel in the steel tank 10 form a local closed space; the grouting equipment 13 pours the grout into the grouting pipe 1 and flows into the closed space from the grout outlet 5, so as to realize the local grouting in the closed space in the steel tank 10.
As shown in fig. 6, the construction method of the distributed post grouting device for offshore steel pipe piles according to the present invention includes the following steps:
(1) slurry pressing holes are formed in three side surfaces of the steel tank from bottom to top at intervals of 1-3 m in sequence, an opening in the bottom of the steel tank is sealed by a steel plate with the slurry pressing holes, and the slurry pressing holes are sealed by anti-blocking pieces with the same size;
(2) when the steel pipe pile is in a horizontal state, uniformly distributing the steel grooves plugged with the steel plates around the outer side wall of the steel pipe pile, and sealing the bottom openings of the steel grooves by adopting the same thick steel plates;
(3) hoisting the steel pipe pile to a pile position, and performing pile sinking operation;
(4) placing an air type grouting component in each steel groove through a lifting positioning device, and conveying the air type grouting component to the bottom of each steel groove, wherein the air type grouting component in each steel groove is positioned at the same elevation;
(5) the square rubber air bag at the upper end is inflated through the upper air pipe, and meanwhile, the square rubber air bag at the lower end is not inflated until the square rubber air bag and the inner wall of the steel groove form a closed space for grouting in a sufficient air state; grouting into the grouting pipe by using grouting equipment, enabling the grout to flow into the grouting pipe and flow into the closed space through a grout outlet on the grouting pipe, flushing the anti-blocking piece by the grout in the closed space, and then flowing to the outer side of the steel pipe pile through a grouting hole to perform grouting on the pile end position; synchronously grouting the pile end position in each steel groove, and finishing pile end grouting when the grouting amount reaches a pre-estimated value and the grouting pressure meets the requirement;
(6) pumping the gas in the square rubber air bag at the upper end through the upper air pipe, and decompressing the square rubber air bag at the upper end; the pneumatic grouting component is moved upwards to the position of the next grouting hole through the lifting positioning device, and the pneumatic grouting component in each steel groove is located at the same elevation;
(7) the upper air pipe is used for inflating the square rubber air bag at the upper end, and the lower air pipe is used for inflating the square rubber air bag at the lower end until the square rubber air bag and the inner wall of the steel groove form a closed space for grouting in a state that the upper end and the lower end are full;
(8) grouting into the grouting pipe by using grouting equipment, enabling the grout to flow into the grouting pipe and flow into the closed space through a grout outlet on the grouting pipe, flushing the anti-blocking piece by the grout in the closed space, and then flowing to the outer side of the steel pipe pile through a grouting hole to perform grouting on the lateral position of the pile; synchronously grouting the same section of the steel pipe pile in each steel groove, and finishing pile side grouting of the same section when grouting amount reaches a predicted value and grouting pressure meets requirements;
(9) the air in the square rubber air bag at the upper end is pumped away through the upper air pipe, and the air in the square rubber air bag at the lower end is pumped away through the lower air pipe, so that the pressure of the square rubber air bag is relieved; sequentially moving the pneumatic grouting component to the position of the next grouting hole from bottom to top by the lifting positioning device; and (5) repeating the steps (7) and (8) until the pile-forming grouting is completed.
Claims (10)
1. The utility model provides a pneumatic mud jacking subassembly which characterized in that: the grouting device comprises a grouting pipe (1) which is used for being placed into a vertical square grouting channel, square rubber air bags (2) which are coated on the outer side of the grouting pipe at intervals from top to bottom, an upper air pipe (3) which is connected with the square rubber air bag at the upper end and used for inflating the square rubber air bag, and a lower air pipe (4) which is connected with the square rubber air bag at the lower end and used for inflating the square rubber air bag, wherein a plurality of grout outlets (5) are uniformly distributed on the outer side surface of the grouting pipe (1) which is away from the square rubber air bags at the upper end and the; the square rubber air bags (2) are full under the action of external air pressure, and the square rubber air bags at the upper end and the lower end in a sufficient air state and the inner wall of the vertical square grouting channel form a local closed space.
2. The pneumatic mud jacking assembly of claim 1, wherein: the upper end and the lower end of the square rubber air bag positioned at the upper end of the grouting pipe (1) are provided with upper fixing clamps (6) used for clamping the square rubber air bag.
3. The pneumatic mud jacking assembly of claim 1, wherein: the upper end and the lower end of the square rubber air bag positioned at the lower end of the grouting pipe (1) are provided with lower fixing clamps (7) used for clamping the square rubber air bag.
4. The pneumatic mud jacking assembly of claim 1, wherein: the mud jacking pipe (1) is connected with mud jacking equipment (13).
5. Offshore steel pipe pile distributed post-grouting device based on pneumatic grouting components according to any one of claims 1 to 4, characterized in that: the device comprises a steel pipe pile (8), steel grooves (10) which are uniformly distributed on the periphery of the outer wall of the steel pipe pile and are provided with a plurality of grouting holes (9), steel plates (11) which block openings at the bottom of the steel grooves and are provided with the grouting holes (9), an air type grouting component positioned in the steel grooves (10) and a lifting positioning device (12) which is used for driving the air type grouting component to move up and down along the steel grooves; the square rubber air bag of the pneumatic type mud jacking component and the inner wall of the steel groove form a closed space for jacking under a sufficient air state.
6. The offshore steel pipe pile distributed post-grouting device according to claim 5, characterized in that: the lifting and positioning device (12) is a gantry type lifter.
7. The offshore steel pipe pile distributed post-grouting device according to claim 5, characterized in that: and slurry pressing holes (9) are sequentially arranged on three side surfaces of the steel groove (10) from bottom to top, and the distance between every two adjacent slurry pressing holes (9) is 1-3 m.
8. The offshore steel pipe pile distributed post-grouting device according to claim 5, characterized in that: an anti-blocking piece (14) is arranged in the mud jacking hole (9).
9. The offshore steel pipe pile distributed post-grouting device according to claim 8, characterized in that: the anti-blocking piece (14) is a strong magnetic button.
10. A construction method of the offshore steel pipe pile distributed post-grouting device according to any one of claims 1 to 9, characterized by comprising the following steps:
(1) slurry pressing holes are formed in three side surfaces of the steel tank from bottom to top at intervals of 1-3 m in sequence, an opening in the bottom of the steel tank is sealed by a steel plate with the slurry pressing holes, and the slurry pressing holes are sealed by anti-blocking pieces with the same size;
(2) when the steel pipe pile is in a horizontal state, uniformly distributing the steel grooves plugged with the steel plates around the outer side wall of the steel pipe pile, and sealing the bottom openings of the steel grooves by adopting the same thick steel plates;
(3) hoisting the steel pipe pile to a pile position, and performing pile sinking operation;
(4) placing an air type grouting component in each steel groove through a lifting positioning device, and conveying the air type grouting component to the bottom of each steel groove, wherein the air type grouting component in each steel groove is positioned at the same elevation;
(5) the square rubber air bag at the upper end is inflated through the upper air pipe, and meanwhile, the square rubber air bag at the lower end is not inflated until the square rubber air bag and the inner wall of the steel groove form a closed space for grouting in a sufficient air state; grouting into the grouting pipe by using grouting equipment, enabling the grout to flow into the grouting pipe and flow into the closed space through a grout outlet on the grouting pipe, flushing the anti-blocking piece by the grout in the closed space, and then flowing to the outer side of the steel pipe pile through a grouting hole to perform grouting on the pile end position; synchronously grouting the pile end position in each steel groove, and finishing pile end grouting when the grouting amount reaches a pre-estimated value and the grouting pressure meets the requirement;
(6) pumping the gas in the square rubber air bag at the upper end through the upper air pipe, and decompressing the square rubber air bag at the upper end; the pneumatic grouting component is moved upwards to the position of the next grouting hole through the lifting positioning device, and the pneumatic grouting component in each steel groove is located at the same elevation;
(7) the upper air pipe is used for inflating the square rubber air bag at the upper end, and the lower air pipe is used for inflating the square rubber air bag at the lower end until the square rubber air bag and the inner wall of the steel groove form a closed space for grouting in a state that the upper end and the lower end are full;
(8) grouting into the grouting pipe by using grouting equipment, enabling the grout to flow into the grouting pipe and flow into the closed space through a grout outlet on the grouting pipe, flushing the anti-blocking piece by the grout in the closed space, and then flowing to the outer side of the steel pipe pile through a grouting hole to perform grouting on the lateral position of the pile; synchronously grouting the same section of the steel pipe pile in each steel groove, and finishing pile side grouting of the same section when grouting amount reaches a predicted value and grouting pressure meets requirements;
(9) the air in the square rubber air bag at the upper end is pumped away through the upper air pipe, and the air in the square rubber air bag at the lower end is pumped away through the lower air pipe, so that the pressure of the square rubber air bag is relieved; sequentially moving the pneumatic grouting component to the position of the next grouting hole from bottom to top by the lifting positioning device; and (5) repeating the steps (7) and (8) until the pile-forming grouting is completed.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114319331A (en) * | 2022-03-08 | 2022-04-12 | 中国长江三峡集团有限公司 | Construction method of underwater pipe pile type foundation and underwater pipe pile type foundation |
| CN114508095A (en) * | 2022-02-24 | 2022-05-17 | 中南大学 | High-pressure slurry wall protection construction method |
| CN115030139A (en) * | 2022-06-27 | 2022-09-09 | 金陵科技学院 | Novel steel pipe pile for soft soil field and construction method thereof |
| CN115369882A (en) * | 2022-09-05 | 2022-11-22 | 中国建筑第七工程局有限公司 | Post grouting device for cast-in-place pile and construction method |
| CN116122271A (en) * | 2023-02-03 | 2023-05-16 | 江苏泰康工程咨询监理有限公司 | Intelligent self-balancing compound grouting device and method for steel pipe pile based on Internet of things technology |
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Application publication date: 20200807 |