CN212271029U - Industrially-manufactured resistance monitoring device for underwater compacted sand pile end - Google Patents
Industrially-manufactured resistance monitoring device for underwater compacted sand pile end Download PDFInfo
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- CN212271029U CN212271029U CN202020807439.6U CN202020807439U CN212271029U CN 212271029 U CN212271029 U CN 212271029U CN 202020807439 U CN202020807439 U CN 202020807439U CN 212271029 U CN212271029 U CN 212271029U
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Abstract
The utility model discloses an end resistance monitoring device of an underwater compacted sand pile manufactured in a factory, which comprises an expansion head arranged at the bottom end of a pile pipe, an end resistance sensor, an optical fiber wire and an optical fiber wire protection system; the end resistance sensor comprises a steel box and a grating tail fiber led out from the center of the top surface of the steel box, and the steel box is embedded in the through hole of the end plate of the expansion head and then is connected with the through hole through full welding; the optical fiber lead comprises an optical fiber lead section in the enlarged head and an optical fiber lead section outside the pile tube which are connected with each other; the optical fiber wire section in the expansion head is parallel to the end plate, the inner end of the optical fiber wire section is connected with the outer end of the grating tail fiber, and the outer end of the optical fiber wire section in the expansion head penetrates out of the wire through hole of the expansion head; the optical fiber conducting wire section outside the pile pipe is fixed on the top of the pile pipe after being straightly arranged along one path of the outer wall of the pile pipe; the optical fiber lead protection system comprises a surface layer protection structure, an expansion head inner protection structure and a pile pipe outer protection structure. The utility model discloses conveniently change the enlarged footing and can reduce the work load of on-the-spot installation.
Description
Technical Field
The utility model relates to a crowded sand pile tip resistance monitoring devices under water of batch production preparation.
Background
As a new foundation reinforcing technology, the underwater compaction sand pile can increase the strength of the foundation, accelerate the consolidation of the foundation, reduce the settlement of structures and improve the liquefaction resistance of the foundation, and has the advantages of short construction period, direct and obvious reinforcing effect, good process controllability and the like. Can be widely applied to the foundation reinforcement treatment of almost all soils such as sandy soil, cohesive soil, organic soil and the like. The method is very suitable for foundation reinforcement of projects such as open sea artificial islands, breakwaters, revetments, wharfs and the like. Compared with the common sand pile, the pile body of the underwater compacted sand pile has high compactness, and the replacement rate of the reinforcement can reach 60 to 70 percent.
With the development of offshore artificial islands and offshore wind power in China, the foundation reinforcement requirement in offshore engineering is increased, and the requirement for underwater compacted sand piles is increased. The offshore construction is greatly influenced by wind and waves, so that the construction time window is short. However, in the conventional installation process of the dynamic measurement device for the end resistance of the underwater compacted sand pile, the box body of the end resistance sensor and the end plate of the pile pipe need to be welded and protected on the pile driving site of a construction ship, and then the end plate of the pile pipe is welded with the enlarged head, so that the installation difficulty of the construction ship is high, the welding operation space is small, the requirement on the technical level of required workers is high, the occupied construction time is long, the calibration difficulty of the resistance sensor at the rear end of welding is high, and the survival rate of the end resistance sensor is low. Therefore, in open sea engineering, the technical problem of the installation process of the dynamic monitoring equipment for the resistance of the underwater compacted sand pile end is always a technical problem which puzzles the engineering community.
The traditional dynamic monitoring equipment installation process for underwater compacted sand pile end resistance is developed around two aspects, firstly, technical training of field end resistance sensor welding installation and wire protection is carried out on workers, the construction period is shortened, secondly, the spare amount and the replacement times of end resistance sensors are increased, and the effective monitoring quantity of pile end resistance is guaranteed. However, the methods do not well solve the problem of the installation process of the dynamic monitoring equipment for the resistance of the underwater compacted sand pile end in open sea engineering.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and provide a monitoring devices of crowded sand pile end resistance under water of batch production preparation, it can make things convenient for direct change enlarged footing and end resistance sensor to have the structure and simplify, reduce the work load of on-the-spot installation, effectively shorten construction period's characteristics.
The purpose of the utility model is realized like this: an end resistance monitoring device for an underwater compacted sand pile manufactured in a factory comprises a pile pipe, an enlarged head, an end resistance sensor, an optical fiber lead and an optical fiber lead protection system; wherein the content of the first and second substances,
the expansion head is detachably arranged at the bottom end of the pile pipe, and the center of an inner cavity of the expansion head is connected with an end plate with the thickness of 50mm through a cross rib plate; the outer wall of the expanded head, which is positioned above the end plate and staggered with the cross rib plate, is provided with a lead perforation, and the end plate is provided with a through hole;
the end resistance sensor is a grating optical fiber type sensor and comprises a closed steel box which is internally provided with a grating and filled with oil, has the diameter of 118cm and the thickness of 30cm, and a grating tail fiber which is led out from the center of the top surface of the steel box, has the diameter of 18cm and the length of 50cm, is embedded in a through hole of the end plate in a mode that the top surface of the steel box faces upwards, and the bottom surface of the steel box is flush with the bottom surface of the end plate, and the outer peripheral surface of the steel box is connected with the inner peripheral surface of the through hole through full welding;
the optical fiber conductor comprises an optical fiber conductor section in the enlarged head and an optical fiber conductor section outside the pile tube which are connected with each other; the optical fiber conducting wire section outside the pile pipe consists of an optical fiber conducting wire section of the soil entering part of the pile pipe and an optical fiber conducting wire section of the water entering part of the pile pipe; the optical fiber wire section in the expansion head is parallel to the end plate, the inner end of the optical fiber wire section is connected with the outer end of the grating tail fiber, and the outer end of the optical fiber wire section in the expansion head penetrates out of the wire through hole of the expansion head; the optical fiber conducting wire section outside the pile pipe is connected with the optical fiber conducting wire section inside the enlarged head at the joint of the enlarged head and the pile pipe, and then is fixed at the top of the pile pipe after being directly attached to one path of the outer wall of the pile pipe along the axial direction of the pile pipe;
the optical fiber lead protection system comprises a surface layer protection structure, an expansion head inner protection structure and a pile pipe outer protection structure;
the surface layer protection structure comprises inner-layer ceramic fiber cloth wrapped outside the optical fiber conductor, a rubber tube sleeved outside the inner-layer ceramic fiber cloth and implanted with steel wires, a plurality of inner binding belts alternately fastened outside the rubber tube, outer-layer ceramic fiber cloth wrapped outside the rubber tube and outside the inner binding belts, and a plurality of outer binding belts alternately fastened outside the outer-layer ceramic fiber cloth;
the protective structure in the enlarged head is a protective groove welded on the top surface of the end plate, and the protective groove is composed of a cross rib plate close to the wire through hole and a steel plate parallel to the cross rib plate, so that the grating tail fiber and the optical fiber wire sections in the two enlarged heads with surface layer protective structures are clamped in the protective groove;
the pile pipe outer protection structure comprises a traction steel wire rope, a plurality of binding ropes and a channel steel; the traction steel wire rope is arranged among a plurality of nuts which are welded on the outer wall of the pile pipe at intervals along the axial direction of the pile pipe in a penetrating way; a plurality of traction binding ropes bind the optical fiber wire sections outside the pile pipe with the surface layer protection structure and the traction steel wire rope at intervals; the channel steel is welded on the outer wall of the soil-entering part of the pile pipe along the axial direction of the pile pipe and integrally covers the optical fiber conductor section, the traction steel wire rope and the screw cap of the soil-entering part of the pile pipe with the surface layer protection structure.
The device for monitoring the resistance of the underwater compacted sand pile end manufactured in the factory comprises a surface layer protection structure, wherein the distance between the inner binding belts in the surface layer protection structure is 50cm, and the distance between the outer binding belts is 30 cm.
The device for monitoring the resistance of the end of the underwater compacted sand pile manufactured in the factory is characterized in that the spacing distance of nuts in the pile pipe outer protection structure is 50cm, and the spacing distance of the traction binding rope is 30 cm.
The utility model discloses a crowded sand pile end resistance monitoring devices under water of batch production preparation has following characteristics: the adoption carries out the installation of stake end resistance monitoring devices in the mill to can dismantle connection structure with fragile enlarged footing and stake pipe adoption, still install stake end resistance monitoring devices on enlarging the overhead, be convenient for directly change enlarged footing and end resistance sensor, have the structure and simplify, convenient the change, the characteristics that need not the on-the-spot demarcation have not only increased dynamic monitoring equipment's survival rate, and the preparation technology is simpler moreover, reduces the work load of on-the-spot installation, effectively shortens the time limit for a project.
Drawings
Fig. 1 is a schematic structural view of a device for monitoring resistance of an underwater compacted sand pile end manufactured in a factory according to the present invention;
FIG. 2 is a view A-A of FIG. 1 (90 clockwise);
fig. 3 is a schematic view of the surface layer protection structure in the underwater sand compaction pile end resistance monitoring device of the present invention;
fig. 4 is a schematic view of the protection structure in the enlarged head of the device for monitoring the end resistance of the underwater compacted sand pile of the present invention;
fig. 5 is a schematic diagram of the pile pipe outer part protection structure in the industrially manufactured underwater compacted sand pile end resistance monitoring device of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 5, the device for monitoring end resistance of an underwater compacted sand pile manufactured in a factory according to the present invention includes a pile tube 1, an enlarged head 2, an end resistance sensor 3, an optical fiber wire 4 and an optical fiber wire protection system;
the enlarged head 2 is detachably connected to the bottom end of the pile pipe 1, the center of the inner cavity of the enlarged head 2 is connected with an end plate 20 with the thickness of 50mm through a cross rib plate 21, a through hole is formed in the end plate 20, and a wire through hole is formed in the outer wall, located above the end plate 20, of the enlarged head 2 and staggered from the cross rib plate 21.
The end resistance sensor is a grating optical fiber type sensor and comprises a closed steel box 30 which is internally provided with a grating and filled with oil, the closed steel box 30 is 118cm in diameter and 30cm in thickness, and a grating tail fiber 31 which is led out from the center of the top surface of the steel box 30 and is 18cm in diameter and 50cm in length; when the steel box 30 of the end resistance sensor is subjected to pile end resistance, the oil pressure in the steel box 30 changes, the change of the oil pressure causes the change of the grating coupling wavelength, and end resistance information is obtained through calculation of a fiber grating mediation instrument; the end resistance sensor is embedded in the through hole of the end plate 20 in a way that the top surface of the steel box 30 faces upwards and the bottom surface of the steel box is flush with the bottom surface of the end plate 20, and the outer circumferential surface of the steel box 30 is connected with the inner circumferential surface of the through hole through full welding.
The optical fiber conductor 4 is an armored optical fiber conductor and comprises an optical fiber conductor section 41 in the enlarged head and an optical fiber conductor section 42 outside the pile tube which are connected with each other; the optical fiber conductor segment 42 outside the pile tube consists of an optical fiber conductor segment at the soil-entering part of the pile tube and an optical fiber conductor segment at the water-entering part of the pile tube; the optical fiber wire section 41 in the enlarged head is parallel to the end plate 20, the inner end of the optical fiber wire section is connected with the outer end of the grating tail fiber 31, and the outer end of the optical fiber wire section 41 in the enlarged head penetrates out of the wire through hole of the enlarged head 2; the optical fiber conducting wire section 42 outside the pile pipe is connected with the optical fiber conducting wire section 41 inside the enlarged head at the joint of the enlarged head 2 and the pile pipe 1, is fixed on the top of the pile pipe 1 after being straightly adhered to one path of the outer wall of the pile pipe 1 along the axial direction of the pile pipe 1, and is connected with the optical fiber grating mediating instrument;
the optical fiber lead protection system comprises a surface layer protection structure, an expansion head inner protection structure and a pile pipe outer protection structure; wherein the content of the first and second substances,
the surface layer protection structure comprises an inner layer ceramic fiber cloth 51 wrapped outside the optical fiber lead 4, a rubber tube 52 which is sleeved outside the inner layer ceramic fiber cloth 51 and is implanted with steel wires, a plurality of inner binding bands 53 which are fastened outside the rubber tube 52 at intervals of 50cm, an outer layer ceramic fiber cloth 54 wrapped outside the rubber tube 52 and outside the inner binding bands 53, and a plurality of outer binding bands 55 which are fastened outside the outer layer ceramic fiber cloth 54 at intervals of 30 cm;
the surface layer protection structure of the utility model adopts the ceramic fiber cloth 51 to replace the traditional asbestos cloth to wrap the armored optical fiber wire, thereby not only meeting the requirement of wrapping the armored optical fiber wire, but also preventing sparks from firing the optical fiber wire during welding and playing the requirement of fire insulation; in addition, the rubber tube 52 implanted with the steel wire is adopted to replace the traditional rubber tube to protect the armored optical fiber conductor, so that the tensile strength of the armored optical fiber conductor is increased, and the optical fiber conductor is prevented from being pulled apart;
the protection structure in the enlarged head is used for protecting the grating tail fiber 31 and the optical fiber conducting wire section 41 in the enlarged head with the surface layer protection structure, the protection structure in the enlarged head is a protection groove 60 welded on the top surface of the end plate 20, the protection groove 60 is composed of a cross rib plate close to the through hole of the conducting wire and a steel plate parallel to the cross rib plate, so that the grating tail fiber 31 and the optical fiber conducting wire sections 41 in the two enlarged heads with the surface layer protection structures are clamped in the protection groove 60;
the pile pipe outer protection structure is used for protecting an optical fiber conductor section 42 outside a pile pipe with a surface layer protection structure, and comprises a traction steel wire rope 71 with the diameter of 8mm, a plurality of binding ropes and a channel steel 73; the traction steel wire rope 71 is arranged among a plurality of nuts 72 which are welded on the outer wall of the pile pipe 1 along the axial direction of the pile pipe 1 at intervals of 50 cm; binding the optical fiber conductor segment 32 outside the pile tube with the surface layer protection structure and a traction steel wire rope 71 together by a plurality of traction binding ropes at intervals of 30 cm; the channel steel 73 is welded on the outer wall of the embedded part of the pile pipe along the axial direction of the pile pipe 1 and integrally covers the optical fiber conductor segment, the traction steel wire rope 71 and the screw cap 72 of the embedded part of the pile pipe with the surface layer protection structure.
The utility model discloses an crowded sand pile end resistance monitoring devices under water of batch production preparation includes following step when the preparation:
1) firstly, cutting a cover plate on the outer wall of the expanded head 2 which is positioned above the end plate 20 and staggered with the cross rib plate 21 to reserve an operation hole, and digging a wire perforation hole which can be used for leading out an optical fiber wire section 51 in the expanded head with a surface layer protection structure on the wall of the operation hole; then, a through hole is formed in the end plate 20, the steel box 30 of the end resistance sensor is placed in the through hole of the end plate 20, and the steel box 30 and the through hole of the end plate 20 are fully welded together and polished to be flat, so that on one hand, stress concentration which is possibly generated when the steel box 30 protrudes out of the bottom surface of the end plate 20 is solved, and the end plate 20 extruded by huge soil pressure is also avoided. Because the welding can generate local high temperature, the steel box 30 can not resist the high temperature of the welding, so in the welding process, the steel box 30 is protected by wet cloth, and watering is carried out if necessary, so that the end resistance sensor is prevented from being damaged due to overhigh welding temperature; in the whole process, the grating tail fiber 31 of the end resistance sensor is protected from being stressed;
2) firstly, connecting an optical fiber conducting wire section 41 in an enlarged head with a grating tail fiber 31, then making a surface layer protection structure on the optical fiber conducting wire section 41 in the enlarged head, then making an enlarged head internal protection structure on the optical fiber conducting wire section 41 in the enlarged head with the surface layer protection structure on an end plate 20, namely making a protection groove 60, preventing falling sand in the pile pipe 1 from damaging an end resistance sensor, then welding a cover plate on the outer wall of the enlarged head 2 in an operation hole again and avoiding an outgoing line of the optical fiber conducting wire section 41 in the enlarged head, and finally connecting the enlarged head 2 to the bottom end of the pile pipe 1;
3) firstly, butting the optical fiber conducting wire section 42 outside the pile pipe with a surface layer protection structure at the joint of the expanded head 2 and the pile pipe 1 with the outlet end of the optical fiber conducting wire section 41 in the expanded head; when the expansion head 2 is damaged and needs to be replaced, the expansion head 2, the end resistance sensor and the optical fiber wire section 41 in the expansion head can be conveniently detached, and the end resistance sensor is also conveniently replaced; the optical fiber conductor is not tensile, the using environment is underwater and vibration conditions, and part of the optical fiber conductor needs to be driven into a soil body along with the pile pipe 1, so that protection is needed to ensure the tightness of the optical fiber, prevent pulling and avoid bending; firstly, an optical fiber conducting wire section 42 outside a pile pipe is fixed on a traction steel wire rope 71 with the diameter of 8mm through a plurality of traction binding ropes with the intervals of 30cm, the optical fiber conducting wire section 42 outside the pile pipe is pulled on the outer wall of the pile pipe 1 by the traction steel wire rope 71 to be straight, then a plurality of M8 screw caps 72 are sleeved on the traction steel wire rope 71, and the screw caps 72 are welded on the pile pipe 1 at the intervals of 50cm, so that the optical fiber conducting wire section 42 outside the pile pipe is attached and fixed with the pile pipe 1 into a whole when entering water and soil along with the pile pipe 1, and the optical fiber conducting wire section cannot shake. In addition, for the optical fiber conductor at the embedded part of the pile pipe, the optical fiber conductor segment at the embedded part of the pile pipe, the traction steel wire rope 71 and the nut 72 are integrally covered and welded on the outer wall of the pile pipe 1 by using a No. 8 channel steel 73 so as to prevent the optical fiber conductor segment at the embedded part of the pile pipe from being extruded by soil.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (3)
1. An end resistance monitoring device for an underwater compacted sand pile manufactured in a factory comprises a pile pipe, an enlarged head, an end resistance sensor, an optical fiber lead and an optical fiber lead protection system; it is characterized in that the preparation method is characterized in that,
the expansion head is detachably arranged at the bottom end of the pile pipe, and the center of an inner cavity of the expansion head is connected with an end plate with the thickness of 50mm through a cross rib plate; the outer wall of the expanded head, which is positioned above the end plate and staggered with the cross rib plate, is provided with a lead perforation, and the end plate is provided with a through hole;
the end resistance sensor is a grating optical fiber type sensor and comprises a closed steel box which is internally provided with a grating and filled with oil, has the diameter of 118cm and the thickness of 30cm, and a grating tail fiber which is led out from the center of the top surface of the steel box, has the diameter of 18cm and the length of 50cm, is embedded in a through hole of the end plate in a mode that the top surface of the steel box faces upwards, and the bottom surface of the steel box is flush with the bottom surface of the end plate, and the outer peripheral surface of the steel box is connected with the inner peripheral surface of the through hole through full welding;
the optical fiber conductor comprises an optical fiber conductor section in the enlarged head and an optical fiber conductor section outside the pile tube which are connected with each other; the optical fiber conducting wire section outside the pile pipe consists of an optical fiber conducting wire section of the soil entering part of the pile pipe and an optical fiber conducting wire section of the water entering part of the pile pipe; the optical fiber wire section in the expansion head is parallel to the end plate, the inner end of the optical fiber wire section is connected with the outer end of the grating tail fiber, and the outer end of the optical fiber wire section in the expansion head penetrates out of the wire through hole of the expansion head; the optical fiber conducting wire section outside the pile pipe is connected with the optical fiber conducting wire section inside the enlarged head at the joint of the enlarged head and the pile pipe, and then is fixed at the top of the pile pipe after being directly attached to one path of the outer wall of the pile pipe along the axial direction of the pile pipe;
the optical fiber lead protection system comprises a surface layer protection structure, an expansion head inner protection structure and a pile pipe outer protection structure;
the surface layer protection structure comprises inner-layer ceramic fiber cloth wrapped outside the optical fiber conductor, a rubber tube sleeved outside the inner-layer ceramic fiber cloth and implanted with steel wires, a plurality of inner binding belts alternately fastened outside the rubber tube, outer-layer ceramic fiber cloth wrapped outside the rubber tube and outside the inner binding belts, and a plurality of outer binding belts alternately fastened outside the outer-layer ceramic fiber cloth;
the protective structure in the enlarged head is a protective groove welded on the top surface of the end plate, and the protective groove is composed of a cross rib plate close to the wire through hole and a steel plate parallel to the cross rib plate, so that the grating tail fiber and the optical fiber wire sections in the two enlarged heads with surface layer protective structures are clamped in the protective groove;
the pile pipe outer protection structure comprises a traction steel wire rope, a plurality of binding ropes and a channel steel; the traction steel wire rope is arranged among a plurality of nuts which are welded on the outer wall of the pile pipe at intervals along the axial direction of the pile pipe in a penetrating way; a plurality of traction binding ropes bind the optical fiber wire sections outside the pile pipe with the surface layer protection structure and the traction steel wire rope at intervals; the channel steel is welded on the outer wall of the soil-entering part of the pile pipe along the axial direction of the pile pipe and integrally covers the optical fiber conductor section, the traction steel wire rope and the screw cap of the soil-entering part of the pile pipe with the surface layer protection structure.
2. The industrially manufactured underwater compacted sand pile tip resistance monitoring device according to claim 1, wherein the inner tie-bands in the surface layer protection structure are all spaced at a distance of 50cm, and the outer tie-bands are all spaced at a distance of 30 cm.
3. The industrially manufactured underwater compacted sand pile tip resistance monitoring device according to claim 1, wherein the distance between the nuts in the pile pipe outer protection structure is 50cm, and the distance between the traction and binding ropes is 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020807439.6U CN212271029U (en) | 2020-05-14 | 2020-05-14 | Industrially-manufactured resistance monitoring device for underwater compacted sand pile end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020807439.6U CN212271029U (en) | 2020-05-14 | 2020-05-14 | Industrially-manufactured resistance monitoring device for underwater compacted sand pile end |
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| Publication Number | Publication Date |
|---|---|
| CN212271029U true CN212271029U (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020807439.6U Active CN212271029U (en) | 2020-05-14 | 2020-05-14 | Industrially-manufactured resistance monitoring device for underwater compacted sand pile end |
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| CN (1) | CN212271029U (en) |
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- 2020-05-14 CN CN202020807439.6U patent/CN212271029U/en active Active
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