CN217053439U - Steel pipe composite pile for abrasive environment - Google Patents
Steel pipe composite pile for abrasive environment Download PDFInfo
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- CN217053439U CN217053439U CN202123320876.9U CN202123320876U CN217053439U CN 217053439 U CN217053439 U CN 217053439U CN 202123320876 U CN202123320876 U CN 202123320876U CN 217053439 U CN217053439 U CN 217053439U
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Abstract
A steel pipe composite pile for an abrasive environment comprises a steel reinforcement cage and a steel pipe structure, wherein the steel pipe structure is arranged in a pile hole, and the steel reinforcement cage penetrates through the steel pipe structure and is arranged in the steel pipe structure and the pile hole; and a grouting system is arranged in the reinforcement cage. The steel pipe structures are connected through series pipe pipelines to form an integral slurry circulating system, and the gas ball valves are arranged in the series pipes to form a separated slurry circulating system. The patent of the utility model adopts the above structure, effectively solved not enough in the background art, strengthened the corrosion resistance of pile foundation, improved the horizontal bearing capacity of pile bolck, practiced thrift the abundant vertical bearing capacity of pile foundation, reduced engineering material's input, reduced engineering cost for bridge foundation construction work efficiency.
Description
Technical Field
The utility model relates to a bridge composite pile construction technical field, specific is a steel pipe composite pile for abrasion environment.
Background
The pile foundations commonly used in domestic bridge structures include precast pile foundations, concrete cast-in-place pile foundations, steel pipe composite pile foundations and the like.
The precast pile foundation is precast by a precast member processing factory, is maintained to reach the design strength, is transported to a construction site, is driven into the soil by a pile driver, and then a bearing platform beam (plate) foundation is poured at the top of the pile. But due to the piling process, the size and the driving depth of the precast pile are limited to a certain extent, and the precast pile is not suitable for large-scale bridge foundations with large vertical loads.
The concrete cast-in-place pile foundation is a deep foundation which is connected into a whole by a plurality of piles and bears dynamic and static loads together, and has the function of penetrating through a soft high-compressibility soil layer or water and transmitting the upper structural load borne by the piles to a harder, denser or less-compressibility foundation bearing layer, but a simple reinforced concrete structure is easy to corrode in an abrasion environment, so that the structural stress is influenced, and the concrete cast-in-place pile foundation is not suitable for the abrasion environment.
The steel pipe composite pile foundation is a pile foundation composite structure which is stressed in a coordinated mode by steel pipe piles and pile foundation concrete and jointly resists external loads, the existing bridge steel pipe composite pile is generally of a uniform-section structure, the section size of a pile foundation is increased to increase the rigidity of the foundation for a large bridge foundation with high abrasion environment and high horizontal scouring force, and meanwhile, the pile length is unnecessarily long for ensuring the vertical bearing capacity requirement and the condition of deep bearing layers of mud flats and soft soil foundations. Because pile foundation cross-sectional area is big, the pile is long too much and will lead to vertical bearing capacity to be rich and surplus too much, is not suitable for in the economy.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a steel pipe composite pile for abrasion environment is provided, a large-scale bridge steel pipe composite pile basis and construction method under the big condition of foundation bearing capacity difference, abrasion environment, horizontal scouring force is provided, effectively solved not enough in the background art, the corrosion resistance of pile basis has been strengthened, the horizontal bearing capacity of pile bolck has been improved, the abundant vertical bearing capacity of pile foundation has been practiced thrift, the input of engineering material has been reduced, the construction cost is reduced, the construction efficiency of bridge foundation is accelerated.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a steel pipe composite pile for an abrasive environment comprises a steel reinforcement cage and a steel pipe structure, wherein the steel pipe structure is arranged in a pile hole, and the steel reinforcement cage penetrates through the steel pipe structure and is arranged in the steel pipe structure and the pile hole;
and a grouting system is arranged in the reinforcement cage.
In a preferable scheme, a plurality of steel pipe structures are connected through series pipes to form an integral type slurry circulation system, and an air ball valve is arranged in each series pipe to form a separated type slurry circulation system.
In the preferred scheme, the steel pipe structure is provided with a lifting ring, the lifting ring is formed by welding an arc-shaped rib plate with holes on the outer wall of the steel pipe main body, and the lifting ring further comprises a stiffening plate welded between the arc-shaped rib plate with holes and the outer wall of the steel pipe.
In a preferred scheme, the mud circulating system comprises series pipes arranged between steel pipe structures, a plurality of sections of external hoses are respectively connected to a series pipe network, one section of external hose is connected to a pump suction reverse circulation rotary drilling machine, a mud separator is arranged on the section of external hose, and the rest external hoses are respectively connected to a sedimentation tank and a mud tank;
the mud circulating system also comprises a mud storage pool and a filter press.
In the preferred scheme, a large-section pile section is formed by drilling a steel pipe structure in a vertical range by adopting a drill rod matched with a large-diameter drill bit, and a small-section pile section is formed by drilling a steel pipe structure bottom opening downwards by adopting a drill rod matched with a small-diameter drill bit;
the drilling rod is arranged on the pump suction reverse circulation rotary drilling machine, and the pump suction reverse circulation rotary drilling machine is arranged in the slurry circulation system.
In a preferred scheme, the grouting system comprises a pile end grouting structure and a distributed grouting structure;
the pile end grouting structure consists of a plurality of sections of pile end grouting pipes, the plurality of sections of pile end grouting pipes are connected through sleeve threaded joints, a pile end grouting head is arranged at the lower end of the pile end grouting structure, and the pile end grouting head is arranged at the bottom of the pile end grouting pipe through a conversion head;
the distributed mud jacking structure is formed by a plurality of sections of distributed mud jacking pipes, the sections of distributed mud jacking pipes are connected through sleeve threaded connectors, and pile end mud jacking devices in the distributed mud jacking structure are arranged at the bottoms of the distributed mud jacking pipes through threaded connectors;
and a special grouting head is also arranged on the sleeve threaded joint in the distributed grouting structure.
In a preferable scheme, the steel pipe structure consists of a plurality of sections of steel pipe main bodies, shear rings are arranged on the inner walls of the steel pipes of the steel pipe main bodies through concave surface fillet welds, the sections of steel pipe main bodies are connected through steel pipe connection and fusion welding, and anticorrosive coating is sprayed at the positions of the steel pipe connection and fusion welding positions.
In a preferable scheme, the lower end of the whole structure of the steel pipe pile formed by the multiple sections of the steel pipe structures is provided with a blade structure.
In the preferred scheme, the lower end of the blade foot structure comprises a thickening transition section, a thickening section is arranged at the lower end of the thickening transition section, and a thinning transition section is arranged at the lower end of the thickening section.
The utility model provides a steel pipe composite pile for abrasion environment through adopting above-mentioned structure, has following beneficial effect:
(1) the maturation is reliable: the corresponding part of the construction method of the utility model is a more and mature construction method applied at the present stage, the construction efficiency is stable, the safety is high, and the construction quality is guaranteed;
(2) green and environment-friendly: the mud circulation system adopted by the method fully utilizes the underwater steel casing of the pile group foundation, and effectively solves the mud circulation problem of the whole period of pile foundation construction. Meanwhile, all the steel casing cylinders are connected in parallel to form an integral circulation system, resources such as a mud pit platform and the like are put into the integral circulation system according to the construction period, and a separated circulation system is formed in the process of blocking through a balloon valve, so that the requirement of one drilling machine and one mud circulation system is met, the resource investment and the field space are saved, the cost investment is reduced, the pollution of a river channel is avoided, the defects of the existing process are overcome, and zero pollution and zero emission are realized in the true sense;
(3) good economy: the pile foundation post-grouting construction process adopted by the method is characterized in that a grouting system is arranged in advance, grouting construction is carried out on the pile foundation after pile forming, pile side friction and pile end resistance of the pile foundation can be effectively improved, bearing performance of the pile foundation is improved, pile foundation settlement is reduced, and meanwhile under the same bearing capacity requirement, design length of the pile foundation can be reduced due to increase of the side resistance and the end resistance, and cost is greatly reduced.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is the structural schematic diagram of the steel pipe composite pile of the present invention.
Fig. 2 is a schematic sectional view of a-a of fig. 1 according to the present invention.
Fig. 3 is a schematic diagram of the distributed grouting pipe structure of the present invention.
Fig. 4 is a schematic view of the pile-end grouting pipe of the present invention.
Fig. 5 is a schematic structural view of the pile-side grouting device of the present invention.
Fig. 6 is a schematic structural view of the pile-end grouting device of the present invention.
Fig. 7 is a schematic diagram of the core concrete structure of the present invention.
Fig. 8 is a schematic view of the steel pipe structure of the present invention.
Fig. 9 is a schematic cross-sectional view of B-B of fig. 8 according to the present invention.
Fig. 10 is a schematic cross-sectional view of fig. 9C-C according to the present invention.
Fig. 11 is a schematic view of the blade foot structure of the present invention.
Fig. 12 is a schematic view of the hanging ring structure of the present invention.
Fig. 13 is a schematic cross-sectional view of fig. 13 taken along line D-D.
Fig. 14-15 are the schematic diagrams of the pore-forming construction of the present invention.
Fig. 16 is a schematic view of a mud circulation system according to the present invention.
Fig. 17 to 19 are schematic diagrams illustrating the lowering construction process of the reinforcement cage of the present invention.
In the figure: a reinforcement cage 1, a steel pipe structure 2, a hanging ring 2.1, an arc ribbed plate with holes 2.1.1, a stiffening plate 2.1.2, a shear ring 2.2, a concave fillet weld 2.2.1, a steel pipe connection fusion welding 2.3, an anticorrosive coating 2.4, a steel pipe main body 2.5, a steel pipe outer wall 2.5.1, a steel pipe inner wall 2.5.2, a cutting edge structure 2.6, a thickening transition section 2.6.1, a thickening section 2.6.2, a thinning transition section 2.6.3, core concrete 3, a large-section pile section 3.1, a small-section pile section 3.2, a grouting system 4, a pile end grouting structure 4.1, a pile end grouting pipe 4.1.1, a sleeve threaded joint 4.1.2, a conversion head 4.1.3, a pile end grouting head 4.1.4, a distributed grouting structure 4.2, a distributed grouting pipe 4.2.1, a sleeve threaded joint 4.2.2, a special grouting pipe 4.2.2, a conversion head 4.1.3, a drill head 4.2, a drill head, a drill bit diameter of a drilling machine, a drilling head of a drilling machine, a mud separator 7.3, an external hose 7.4, a sedimentation tank 7.5, a mud tank 7.6, a mud storage tank 7.7 and a filter press 7.8.
Detailed Description
Example 1:
a steel pipe composite pile for an abrasive environment comprises a steel reinforcement cage 1 and a steel pipe structure 2, wherein the steel pipe structure 2 is arranged in a pile hole, and the steel reinforcement cage 1 penetrates through the steel pipe structure 2 and is arranged in the steel pipe structure 2 and the pile hole;
and a grouting system 4 is arranged in the reinforcement cage 1.
In a preferable scheme, a plurality of steel pipe structures 2 are connected through series pipes 7.1 to form an integral type slurry circulation system 7, and a gas ball valve 7.2 is arranged in the series pipes 7.1 to form a separated type slurry circulation system 7.
In the preferred scheme, the steel pipe structure 2 is provided with a hanging ring 2.1, the hanging ring 2.1 is formed by welding an arc-shaped rib plate with holes 2.1.1 on the outer wall 2.5.1 of the steel pipe 2.5, and the hanging ring 2.1 further comprises a stiffening plate 2.1.2 welded between the arc-shaped rib plate with holes 2.1.1 and the outer wall 2.5.1 of the steel pipe.
In a preferable scheme, the mud circulating system 7 comprises series pipes 7.1 arranged between the steel pipe structures 2, a plurality of sections of external hoses 7.4 are respectively connected into a network of the series pipes 7.1, one section of the external hose 7.4 is connected to a pump suction reverse circulation rotary drilling machine 6, a mud separator 7.3 is arranged on the section of the external hose 7.4, and the rest external hoses 7.4 are respectively connected into a sedimentation tank 7.5 and a mud tank 7.6;
the mud circulating system 7 also comprises a mud storage tank 7.7 and a filter press 7.8.
In the preferred scheme, a large-diameter drill bit 6.2 is adopted to drill in the range of the steel pipe structure 2, when the drill bit reaches the bottom opening of the steel pipe structure 2, a drill rod 6.1 of a pump suction reverse circulation rotary drilling machine 6 is lifted to an opening, the large-diameter drill bit 6.2 is replaced by a small-diameter drill bit 6.3, the drill bit is lowered to continue drilling and hole forming construction,
in a preferred scheme, a pile-end grouting head 4.1.4 in a pile-end grouting structure 4.1 is arranged at the bottom of the pile-end grouting structure 4.1 through a conversion head 4.1.3;
the pile end grouting device 4.2.3 in the distributed grouting structure 4.2 is provided with the distributed grouting structure 4.2 at the bottom through a threaded connector 4.2.2.2;
in the step 9, a special grouting head 4.2.2.1 is arranged on a sleeve threaded joint 4.2.2 of the pile side grouting device.
In a preferable scheme, the lower end of the blade foot structure 2.6 comprises a thickening transition section 2.6.1, the lower end of the thickening transition section 2.6.1 is provided with a thickening section 2.6.2, and the lower end of the thickening section 2.6.2 is provided with a thinning transition section 2.6.3.
In a preferred scheme, in the step 10, the core concrete 3 forms an upper large-section pile section 3.1 and a lower small-section pile section 3.2.
Example 2:
based on the steel pipe composite pile for the abrasive environment in the embodiment 1, the concrete construction method mainly comprises the steps of measurement lofting, steel casing manufacturing and construction, slurry circulating system arrangement, reverse circulation rotary drilling and pore forming, pile foundation reinforcement cage manufacturing and downward installation, pile foundation post-grouting system installation, pile foundation concrete pouring and pile foundation post-grouting construction.
Wherein:
(1) preparation for construction
Before the construction of the steel pipe composite pile, a construction access and a construction platform 5 are built according to the site requirements.
(2) Survey lofting
And (4) discharging the center position of the designed pile through a total station, and pulling and arranging the cross pile protector.
(3) Pore-forming construction
Processing a steel pipe structure 2 with a shear ring 2.2 and a blade foot structure 2.6 in a steel structure processing field in sections, transporting the steel pipe structure 2 to a pile position through a flat car, constructing the steel pipe structure 2 with the blade foot structure 2.6 as a first section, performing driving and lengthening construction under the guide assistance of a double-hole double-layer guide frame by hanging a vibration hammer through a crawler crane, and sequentially constructing all the steel pipe structures 2 at the pile position;
the crawler crane can be a truck crane, a gantry crane and other hoisting equipment which meet the sinking condition of the steel pipe pile vibrating hammer;
the double-hole double-layer guide frame can be a guide frame with three holes, double-layer guide frames and other holes.
(4) The arrangement of a mud circulating system is realized,
the mud circulating system comprises a serial pipe 7.1, a mud tank 7.6, a sedimentation tank 7.5, a steel casing, a mud pump, a sand filter, an air compressor and a pump suction reverse circulation rotary drilling machine 6, all steel pipe structures 2 are connected in parallel to form an integral circulating system, resources such as a mud tank platform and the like are put into the integral circulating system according to the construction period, and a separation circulating system is formed by blocking through a balloon valve 7.2 in the process, so that one mud circulating system of one drilling machine is satisfied;
the mud circulating system can adopt a large mud box and can also lead the mud to a large mud pool on the bank for mud circulation.
(5) Reverse circulation rotary drill drilling pore-forming
The pump suction reverse circulation rotary drilling machine 6 is constructed on the steel pipe structure 2 according to the principle that adjacent holes cannot be drilled simultaneously, mud circulation is carried out through a mud full-period circulation purification system in the drilling process, a drill bit 6.2 with a large diameter is adopted in the steel pipe structure 2 for pump suction reverse circulation drilling, and after the drill bit is drilled to the bottom of the steel pipe structure 2, the drill bit 6.3 with a small diameter is lifted and replaced to drill a hole;
drilling pore-forming order, can adopt the drill bit 6.3 drilling of minor diameter to design elevation earlier, adopt major diameter drill bit 6.2 to sweep the hole to the bottom elevation of steel casing again, clear minor diameter hole to design elevation again.
(6) Pile foundation reinforcement cage manufacturing and downward installation
At steel reinforcement processing field segmental processing pile foundation steel reinforcement cage 1, installation mud jacking system 4, the mud jacking pipe 4.1.1 in the mud jacking system 4, 4.2.1 are the pile foundation sounding pipe concurrently, and 1 main muscle connected mode of pile foundation steel reinforcement cage is straight thread muffjoint, sets up the triangular supports between the enhancement hoop and prevents hoist and mount and transportation in the steel reinforcement cage warp. The reinforcement cage is transported to a construction site by a flat car through a sidewalk and stored on a jig frame. Turning over a steel bar cage section by using hoisting equipment, transferring the transferred steel bar cage section, hanging the transferred steel bar cage on a transfer frame by using a bolt plate, temporarily fixing, hoisting the next steel bar cage section, aligning with a main rib, and rotating a straight thread sleeve for connection;
the mud jacking pipe of the mud jacking system can be designed separately from the sounding pipe, namely a set of sounding pipe and a set of mud jacking pipe are respectively arranged.
(7) Installation of pile foundation post-grouting system
When the reinforcement cage is lowered, a grouting system 4 is installed in the reinforcement cage 1, the grouting system 4 is arranged on the inner side of a reinforcing rib of the reinforcement cage 1 and is uniformly distributed along the circumference of a pile body, and the bottom of the grouting system is connected with a pile end grouting device 4.1.4 through a conversion head 4.1.3; the special grouting head 4.2.2.1 at the pile side consists of a three-way joint, an annular grouting pipe and a grout outlet, wherein the annular grouting pipe is arranged at the outer side of the reinforcement cage and is connected with the vertical grouting steel pipe through the three-way joint; the number of grout outlets of each layer of pile side grouting device is not less than 4, and the grout outlets are close to the hole wall and face the soil mass around the pile.
(8) Pile foundation concrete pouring
After the steel reinforcement cage is placed in place and fixed, the guide pipe is placed by utilizing the hoisting equipment, the guide pipe is placed in place and then is cleaned through pumping reverse circulation, concrete pouring is carried out after cleaning the hole to reach the standard, and the replaced slurry enters a slurry circulation system.
(9) Pile foundation post grouting construction
If obvious excessive drilling, reaming and other phenomena occur in the pore-forming process, the grouting system needs to be plugged, high-pressure clear water is adopted to inject water into the grouting pipe within 12-24 hours after the pouring of pile foundation concrete is completed, the water injection is stopped when the pressure is obviously reduced, the plugging opening is completed, otherwise, the plugging opening construction is not performed, the pile foundation integrity is detected by ultrasonic after the strength of the pile foundation concrete reaches 70% of the design strength, and the pile foundation post-grouting construction is performed after the strength of the pile foundation concrete reaches 75% after the pile foundation concrete is detected to be qualified.
Example 3:
the construction method of the steel pipe composite pile described in embodiment 2 specifically includes the steps of:
1) prefabricating a steel pipe structure 2, welding a lifting ring 2.1 on a steel pipe main body 2.5 of the steel pipe structure 2, spraying an anticorrosive coating 2.4 on the outer wall 2.5.1 of the steel pipe 2.5, and transporting the processed steel pipe 2.5 to a construction site;
2) a construction platform 5 is built, a single-section steel pipe structure 2 is hoisted to the construction platform 5 through a truck crane matched with a hoisting ring 2.1, and a plurality of shear rings 2.2 are welded on the inner wall 2.5.2 of a steel pipe main body 2.5 at equal intervals through concave fillet welds 2.2.1;
3) connecting a multi-section steel pipe main body 2.5 through a steel pipe connecting fusion-through welding 2.3, connecting a section of blade foot structure 2.6 at the lowest end of the multi-section steel pipe main body 2.5 through a steel pipe connecting fusion-through welding 2.3, and then spraying an anticorrosive coating 2.4 at the position of the steel pipe connecting fusion-through welding 2.3;
4) measuring a lofting pile outlet position, placing a fixed guide frame, enabling the steel pipe structure 2 to stand above the pile position through mutual matching of a truck crane and a crawler crane, hanging a vibration hammer by the crawler crane, clamping the upper opening of the steel pipe structure 2 by the vibration hammer for sinking, enabling the steel pipe structure 2 to sink to a designed elevation, and re-measuring the steel pipe structure 2 which is sunk in place;
5) repeating the step 4 to sink the multi-section steel pipe structure 2 in place, and then communicating the multi-section steel pipe structure 2 through a slurry circulating system 7 on site;
6) placing a pump suction reverse circulation rotary drilling machine 6 to a construction platform 5, measuring the center of a lofting pile position, adjusting the center position of the pump suction reverse circulation rotary drilling machine 6, fixing the pump suction reverse circulation rotary drilling machine 6 and the construction platform 5 after the pump suction reverse circulation rotary drilling machine 6 is in place, drilling to form a hole by adopting a pump suction reverse circulation drilling construction method, synchronously performing slurry circulation operation by a slurry circulation system 7 in the pump suction reverse circulation drilling construction process, cleaning the hole by adopting slurry circulation after hole forming, and finally detecting the hole by adopting a detector for checking and accepting;
7) when the hole is formed by drilling through a rotary drill, the reinforcement cage 1 is segmented in a reinforcement processing field, and the reinforcement cage 1 is transported to a pile position on site;
8) a grouting system 4 is arranged on the inner wall of the steel reinforcement cage 1, and the grouting system 4 comprises a pile end grouting structure 4.1 and a distributed grouting structure 4.2;
9) the main hook and the auxiliary hook of the crawler crane are matched to finish the conversion of the bottom section steel reinforcement cage 1 from horizontal placement to vertical state, the steel reinforcement cage 1 is placed downwards, the steel reinforcement cage 1 is lengthened through a steel reinforcement sleeve, the pile end grouting pipe 4.1.1 is lengthened through a sleeve threaded joint 4.1.2, and the distributed grouting pipe 4.2.1 is lengthened through a sleeve threaded joint 4.2.2 with a pile side grouting device;
10) after the whole reinforcement cage 1 is put in place, secondary hole cleaning is carried out, the guide pipe is put down after the hole cleaning reaches the standard, core concrete 3 is poured, the guide pipe is removed while pouring under the condition that the buried depth of the guide pipe is more than 2m, the pouring of the core concrete 3 is completed, and slurry displaced in the concrete pouring process enters a slurry circulating system 7;
11) and after the strength of the core concrete 3 meets the design requirement, performing post-grouting construction through the grouting system 4 to complete the construction of the single steel pipe composite pile.
Claims (8)
1. A steel pipe composite pile for abrasive environments, characterized in that: the steel bar cage pile comprises a steel bar cage (1) and a steel pipe structure (2), wherein the steel pipe structure (2) is arranged in a pile hole, and the steel bar cage (1) penetrates through the steel pipe structure (2) and is arranged in the steel pipe structure (2) and the pile hole;
a grouting system (4) is arranged in the reinforcement cage (1);
the steel pipe structures (2) are connected through series pipes (7.1) to form an integral slurry circulating system (7), and air ball valves (7.2) are arranged in the series pipes (7.1) to form a separated slurry circulating system (7).
2. A steel pipe composite pile for an abrasive environment as claimed in claim 1, wherein: the steel pipe structure (2) on be equipped with rings (2.1), rings (2.1) establish by the foraminiferous floor of arc (2.1.1) welding and form on steel pipe outer wall (2.5.1) of steel pipe main part (2.5), rings (2.1) still include the stiffener (2.1.2) of welding between foraminiferous floor of arc (2.1.1) and steel pipe outer wall (2.5.1).
3. A steel pipe composite pile for an abrasive environment as claimed in claim 2, wherein: the mud circulating system (7) comprises series pipes (7.1) arranged between steel pipe structures (2), a plurality of sections of external hoses (7.4) are respectively connected into a network of the series pipes (7.1), one section of external hose (7.4) is connected onto a pump suction reverse circulation rotary drilling machine (6), a mud separator (7.3) is arranged on the section of external hose (7.4), and the rest external hoses (7.4) are respectively connected into a sedimentation tank (7.5) and a mud tank (7.6);
the mud circulating system (7) also comprises a mud storage pool (7.7) and a filter press (7.8).
4. A steel pipe composite pile for an abrasive environment as claimed in claim 1, wherein: a large-section pile section (3.1) is formed by drilling in the vertical range of the steel pipe structure (2) through the drill rod (6.1) in cooperation with the large-diameter drill bit (6.2), and a small-section pile section (3.2) is formed by drilling in the downward direction of the bottom opening of the steel pipe structure (2) through the drill rod (6.1) in cooperation with the small-diameter drill bit (6.3);
the drill rod (6.1) is arranged on the pump-pumping reverse circulation rotary drilling machine (6), and the pump-pumping reverse circulation rotary drilling machine (6) is arranged in the slurry circulation system (7).
5. A steel pipe composite pile for an abrasive environment according to claim 1, wherein: the grouting system (4) comprises a pile end grouting structure (4.1) and a distributed grouting structure (4.2);
the pile end grouting structure (4.1) consists of a plurality of sections of pile end grouting pipes (4.1.1), the plurality of sections of pile end grouting pipes (4.1.1) are connected through sleeve threaded connectors (4.1.2), a pile end grouting head (4.1.4) is arranged at the lower end of the pile end grouting structure (4.1), and the pile end grouting head (4.1.4) is arranged at the bottom of the pile end grouting pipe (4.1.1) through a conversion head (4.1.3);
the distributed type grouting structure (4.2) is formed by connecting a plurality of sections of distributed type grouting pipes (4.2.1), the plurality of sections of distributed type grouting pipes (4.2.1) are connected through sleeve threaded connectors (4.2.2), and pile end grouting devices (4.2.3) in the distributed type grouting structure (4.2) are arranged at the bottom of the distributed type grouting pipes (4.2.1) through threaded connectors (4.2.2.2);
and a special grouting head (4.2.2.1) is also arranged on the sleeve threaded joint (4.2.2) in the distributed grouting structure (4.2).
6. A steel pipe composite pile for an abrasive environment as claimed in claim 1, wherein: the steel pipe structure (2) comprises a plurality of sections of steel pipe main bodies (2.5), shear rings (2.2) are arranged on the inner wall (2.5.2) of the steel pipe of each steel pipe main body (2.5) through concave fillet welds (2.2.1), the sections of the steel pipe main bodies (2.5) are connected through steel pipe connection fusion welds (2.3), and the positions of the steel pipe connection fusion welds (2.3) are sprayed with anticorrosive coatings (2.4) for treatment.
7. A steel pipe composite pile for an abrasive environment as claimed in claim 6, wherein: the lower end of the steel pipe pile integral structure formed by the multiple sections of the steel pipe structures (2) is provided with a blade foot structure (2.6).
8. A steel pipe composite pile for an abrasive environment as claimed in claim 7, wherein: the lower end of the blade foot structure (2.6) comprises a thickening transition section (2.6.1), the lower end of the thickening transition section (2.6.1) is provided with a thickening section (2.6.2), and the lower end of the thickening section (2.6.2) is provided with a thinning transition section (2.6.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123320876.9U CN217053439U (en) | 2021-12-28 | 2021-12-28 | Steel pipe composite pile for abrasive environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123320876.9U CN217053439U (en) | 2021-12-28 | 2021-12-28 | Steel pipe composite pile for abrasive environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164852A (en) * | 2021-12-28 | 2022-03-11 | 中交第二航务工程局有限公司 | Steel pipe composite pile for abrasive environment and construction method |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164852A (en) * | 2021-12-28 | 2022-03-11 | 中交第二航务工程局有限公司 | Steel pipe composite pile for abrasive environment and construction method |
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