CN117988357B - Ultra-large diameter column pile foundation supporting structure and construction method - Google Patents
Ultra-large diameter column pile foundation supporting structure and construction method Download PDFInfo
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- CN117988357B CN117988357B CN202410406320.0A CN202410406320A CN117988357B CN 117988357 B CN117988357 B CN 117988357B CN 202410406320 A CN202410406320 A CN 202410406320A CN 117988357 B CN117988357 B CN 117988357B
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- 238000010276 construction Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims description 137
- 239000010959 steel Substances 0.000 claims description 137
- 238000009434 installation Methods 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 abstract description 7
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Abstract
The invention relates to the technical field of column pile foundations and provides an oversized-diameter column pile foundation supporting structure and a construction method. Through above-mentioned technical scheme, solved current supporting construction and can not carry out multilayer and pile up the construction, can not make the automatic protruding realization secondary of inside and outside wall of supporting construction consolidate when the slip casting after the construction is accomplished to current supporting construction can not carry out the problem that vertical direction supported to the inside of multilayer supporting construction.
Description
Technical Field
The invention relates to the technical field of pile foundations, in particular to an oversized-diameter pile foundation supporting structure and a construction method.
Background
Along with the increasing size of the foundation pit of the tubular column foundation, the integrity of rock mass in the foundation pit is poor, joint cracks develop, the water-rich property of the rock mass and the self-stabilization capability of the rock mass are poor, but the requirements on foundation pit support are also higher and higher, so stronger, higher and more comprehensive requirements are provided for the foundation pit support of the tubular column foundation, and the existing pile foundation support structure has some defects.
For example, publication number CN112663523a discloses a bridge pile foundation anti-displacement reinforcing support structure, head and tail are connected through a plurality of supporting and resisting plates, the supporting and resisting plates are supported by the cooperation hydraulic columns, so that the supporting and resisting plates form a stable support which is matched with the rugged outline of the ground, meanwhile, the self-adaptive supporting structure can be formed by the cooperation of ground inserting nails, thereby the reinforcing support device for double fastening is formed, the fixing seat is sleeved in the middle part of the support sleeve, a plurality of reinforcing plates are arranged on the outer wall of the support sleeve at equal angles and are positioned on the upper part of the support sleeve, the bottoms of a plurality of reinforcing plates are fixedly connected with the fixing seat, one ends of four screws are arranged on the upper part of the fixing seat at equal angles, the other ends of the four screws penetrate through the fixing seat and extend to the lower part of the fixing seat, the screws are arranged at one ends of the screws in a screwing mode, the ground inserting nails are arranged at the other ends of the screws, the four sets of hydraulic columns are arranged at the bottom of the fixing seat, and are in one-to-one correspondence with the four screws. The support structure can realize the function of double fastening, but can not carry out multilayer stacking construction when in use, and can not enable the inner and outer walls of the support structure to automatically bulge to realize secondary reinforcement when grouting is completed after construction, so that the stability is not enough, and the existing support structure can not support the inside of the multilayer support structure in the vertical direction.
Disclosure of Invention
The invention provides an oversized diameter column pile foundation supporting structure and a construction method, which solve the problems that the existing supporting structure cannot carry out multilayer stacking construction, the inner wall and the outer wall of the supporting structure can not automatically bulge to realize secondary reinforcement when grouting is carried out after construction is completed, and the existing supporting structure cannot support the inside of the multilayer supporting structure in the vertical direction.
The technical scheme of the invention is as follows:
The utility model provides an oversized diameter post stake foundation supporting construction, includes the barrel, first dustcoat is installed in the outside of barrel, install the second dustcoat on the inner wall of barrel, install first spliced pole on the second dustcoat, install the second spliced pole on the first dustcoat, install first channel-section steel in the barrel, the below of first channel-section steel is connected with the second channel-section steel, first channel-section steel with the equal fixedly connected with corrugated steel plate of side of second channel-section steel, install the backup pad in the barrel, the top slidable mounting of backup pad has first pillar, the below slidable mounting of backup pad has the second pillar, and is adjacent two install the rubber slab between the backup pad, the intercommunication groove has been seted up in the centre of rubber slab, first pillar with install supporting component between the second pillar.
As a preferential scheme of the invention, the cylinder body, the first outer cover and the second outer cover are integrated, a first grouting hole is formed in the top of the second outer cover, and a second grouting hole is formed in the top of the first outer cover.
As a preferential scheme of the invention, the outer wall of the cylinder body is provided with first through holes, and the positions of the first through holes are in one-to-one correspondence with the inward concave positions of the corrugated steel plate.
As a preferred solution of the present invention, a third through hole and a fourth through hole are formed in the inner wall of the cylinder, the position of the third through hole corresponds to the position of the first support, and the position of the fourth through hole corresponds to the position of the second support.
As a preferred solution of the present invention, the cylinder is provided with an opening through which the support plate passes, the width of the opening is larger than the width of the support plate, the opening is located on the cylinder between the third through hole and the fourth through hole, and the distance between the opening and the corrugated steel plate is larger than the thickness of the support plate.
As a preferred embodiment of the present invention, the position of the second connection post on the first housing corresponds to the position of the first connection post on the second housing, and the second connection post and the first connection post are distributed at equal intervals on the first housing and the second housing.
As a preferential scheme of the invention, the first channel steel and the second channel steel are connected through bolts, a rubber ring is arranged between the first channel steel and the second channel steel, and the first channel steel, the second channel steel and the corrugated steel plate are all of annular structures.
As a preferential scheme of the invention, the diameters of the left and right ends of the first connecting column are larger than the diameter of the middle part of the first connecting column, the diameters of the left and right ends of the second connecting column are larger than the diameter of the middle part of the second connecting column, and gaps are formed between the first connecting column, the second connecting column and the cylinder body.
As a preferential scheme of the invention, the supporting component comprises a first spring and a second spring which are arranged in the supporting plate, the upper side and the lower side of the first spring are respectively connected with the first supporting column and the supporting plate, the upper side and the lower side of the second spring are respectively connected with the supporting plate and the second supporting column, a first traction steel rope is fixedly connected to the first supporting column, a second traction steel rope is fixedly connected to the second supporting column, the first traction steel rope and the second traction steel rope are connected with a connecting block through guiding wheels, the guiding wheels are rotatably arranged in the supporting plate, and the connecting block and the supporting plate are mutually attached.
A construction method of an oversized-diameter column pile foundation supporting structure comprises the following steps:
s1: when a strong weathering section is excavated in a foundation pit, supporting a layer of cylinder body, a first channel steel, a second channel steel and a corrugated steel plate every time a section of depth is excavated, and grouting pipe walls every two layers
S2: the back wire is adopted during field installation, and the jack is corrected for fine installation;
s3: each layer of corrugated steel plate is formed by assembling a plurality of corrugated plates in a circumferential direction, and annular adjacent corrugated plates are connected by welding and transversely connected by adopting steel plates as connecting plate flanges;
S4: after the installation of the annular corrugated plate of the previous layer is completed, the first channel steel and the second channel steel are installed in a web back-to-back flange connection and flange welding connection mode, and joint positions of the corrugated steel plate and the first channel steel and the second channel steel are staggered in the vertical direction;
s5: according to the actual situation of the site, anchor bars are added for temporary fixation, and the first channel steel and the second channel steel are installed by using an electric winch matched with a guide chain;
S6: after the whole installation is finished, a plurality of support plates and rubber plates are installed into the cylinder body, the first support column and the second support column are supported by the support assembly, and then the first channel steel and the second channel steel on the upper layer and the lower layer are longitudinally supported by the first support column and the second support column;
s7: and welding the first outer cover and the second outer cover on the cylinder body for grouting, and extending the first connecting column and the second connecting column to complete the whole fixing work after grouting.
The working principle and the beneficial effects of the invention are as follows:
through annular corrugated steel plate and annular first channel-section steel and the second channel-section steel that sets up, when satisfying the support requirement, the back soil face installation setting of channel-section steel has also reduced the installation degree of difficulty, and the construction of buckled plate and channel-section steel no longer receives the restriction in construction site, has also further reduced the cost, has improved the factor of safety of tubular column type basic foundation pit support, and economic benefits is obvious.
Through the barrel that the multilayer that sets up piles up the distribution for the device can be after first channel-section steel, second channel-section steel and corrugated steel sheet are accomplished in the installation, carries out next floor installation again, is applicable to super large diameter post foundation and uses, has strengthened the convenience when the device construction, has solved current post foundation and can not carry out the problem of multilayer pile construction.
Through the first slip casting hole, the second slip casting hole, first spliced pole and the second spliced pole that set up, after supporting construction installation is accomplished, through grouting in the barrel, make sliding mounting's first spliced pole and second spliced pole remove under the pressure effect to the outside of dustcoat in first dustcoat and the second dustcoat, thereby make the automatic bellied function of interior outer wall of barrel after the slip casting is accomplished, the frictional force on the supporting construction vertical direction has been increased, thereby reinforcing device holistic stability, the problem that current supporting construction can not make supporting construction's interior outer wall automatic protruding realize secondary reinforcement when the slip casting is accomplished in the construction.
Through opening, supporting component, backup pad and the rubber slab that set up, push the inside of barrel through the opening with the backup pad, the backup pad of each position can be along curved orbit removal to the intercommunication groove on the rubber slab can make between the adjacent two backup pads to bend by a small margin, can make two sets of first channel-section steel and the second channel-section steel in the device under supporting component's effect prop tightly by first pillar and second support, thereby strengthen the holistic firm degree of supporting construction, solved current supporting construction and can not carry out the problem that the vertical direction supported to multilayer supporting construction's inside.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the overall structure of an oversized diameter pile foundation support structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic view showing the connection structure of the support plate and the rubber plate according to the present invention;
FIG. 4 is an enlarged schematic view of the structure at B in FIG. 3;
FIG. 5 is an enlarged schematic view of the structure at C in FIG. 3;
FIG. 6 is a schematic view of the structure of a deck plate according to the present invention;
FIG. 7 is an enlarged schematic view of the structure at D in FIG. 6;
FIG. 8 is a schematic view of the connection structure of the barrel and the first channel steel of the present invention;
FIG. 9 is an enlarged schematic view of the structure at E in FIG. 8;
FIG. 10 is a schematic view of the upper structure of the cylinder of the present invention;
FIG. 11 is a schematic view of the structure of the lower part of the cylinder body of the invention.
Reference numerals: 1. a cylinder; 2. a first housing; 3. a first channel steel; 4. a second channel steel; 5. corrugated steel plate; 6. a second housing; 7. a first connection post; 8. a second connection post; 9. a first grouting hole; 10. a rubber ring; 11. a second grouting hole; 12. a first through hole; 13. a support plate; 14. a first support column; 15. a second support; 16. a rubber plate; 17. a communication groove; 18. a support assembly; 1801. a first spring; 1802. a first traction cable; 1803. a second spring; 1804. a second traction cable; 1805. a guide wheel; 1806. a connecting block; 19. a third through hole; 20. an opening; 21. and a fourth through hole.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1-11, this embodiment provides an oversized diameter column pile foundation supporting structure, which comprises a barrel 1, a first housing 2 is installed on the outer side of the barrel 1, a second housing 6 is installed on the inner wall of the barrel 1, a first connecting column 7 is installed on the second housing 6, a second connecting column 8 is installed on the first housing 2, the second connecting columns 8 and the first connecting column 7 on the first housing 2 and the second housing 6 can automatically extend outwards after grouting in the barrel 1, so that the device can increase the friction force when the device moves longitudinally, further the overall stability of the supporting structure is improved, a first channel steel 3 is installed in the barrel 1, a second channel steel 4 is connected below the first channel steel 3, corrugated steel plates 5 are fixedly connected on the side surfaces of the first channel steel 3 and the second channel steel 4, the corrugated steel plates 5 can provide the longitudinal supporting force of the supporting structure, further, the integral strength of the supporting structure is enhanced, the supporting plate 13 is arranged in the cylinder body 1, the first supporting column 14 is slidably arranged above the supporting plate 13, the first supporting column 14 can support the bottom of the upper layer second channel steel 4 after the supporting plate 13 is arranged in the cylinder body 1, the second supporting column 15 is slidably arranged below the supporting plate 13, the second supporting column 15 can support the lower layer first channel steel 3 after the supporting plate 13 is arranged in the cylinder body 1, thereby the supporting structure can realize the effect of multistage supporting in the cylinder body 1, the firmness of each layer of cylinder body 1 is ensured during the subsequent stacking construction, the rubber plate 16 is arranged between two adjacent supporting plates 13, the communication groove 17 is formed in the middle of the rubber plate 16, the supporting component 18 is arranged between the first supporting column 14 and the second supporting column 15, the supporting component 18 can provide the supporting force of the first supporting column 14 and the second supporting column 15, make first pillar 14 and second pillar 15 can stretch out voluntarily and can not break away from in barrel 1, guarantee the holistic intensity of supporting construction in the time of guaranteeing installation stability for first channel-section steel 3 and second channel-section steel 4 can obtain stable support, and this supporting construction is applicable to super large diameter post foundation construction through multilayer pile construction.
Transversely adopting a steel plate as a connecting plate flange for connection;
Example 2
As shown in fig. 1 to 11, this embodiment also proposes an oversized diameter pile foundation supporting structure based on the same concept as embodiment 1 described above.
In this embodiment, the barrel 1, the first housing 2 and the second housing 6 are an integral body, the top of the second housing 6 is provided with the first grouting hole 9, the top of the first housing 2 is provided with the second grouting hole 11, the first housing 2 and the second housing 6 can be integrally welded and fixed after the multi-layer barrel 1 is in butt joint, and the barrel 1 can be grouted in the barrel 1 through the first grouting hole 9 and the second grouting hole 11 in the follow-up process, so that the barrel 1 is kept fixed after the installation is completed.
In this embodiment, first through-hole 12 has been seted up on the outer wall of barrel 1, and follow-up slip casting is made things convenient for to first through-hole 12, and the position of first through-hole 12 and the inside sunken position one-to-one of corrugated steel plate 5 guarantee that the space between corrugated steel plate 5 and barrel 1 can be filled when the slip casting to increase the holistic intensity of supporting construction.
In this embodiment, the inner wall of the cylinder 1 is provided with a third through hole 19 and a fourth through hole 21, the position of the third through hole 19 corresponds to the position of the first support column 14, the position of the fourth through hole 21 corresponds to the position of the second support column 15, and the third through hole 19, the first support column 14, the fourth through hole 21 and the second support column 15, which correspond to each other, are utilized to fill as much of the space in the device during grouting.
In this embodiment, the opening 20 through which the support plate 13 passes is formed in the cylinder 1, the width of the opening 20 is greater than the width of the support plate 13, the opening 20 is located on the cylinder 1 between the third through hole 19 and the fourth through hole 21, the distance between the opening 20 and the corrugated steel plate 5 is greater than the thickness of the support plate 13, the support plate 13 is ensured to be stably placed in the cylinder 1, and the support plate can also move along the arc track in the cylinder 1, so that the subsequent secondary support is performed on the inside of the cylinder 1, and the strength of the support structure is further improved.
In this embodiment, the positions of the second connecting columns 8 on the first housing 2 and the positions of the first connecting columns 7 on the second housing 6 correspond to each other, the second connecting columns 8 and the first connecting columns 7 are all distributed on the first housing 2 and the second housing 6 at equal intervals, and the second connecting columns 8 and the first connecting columns 7 distributed at equal intervals can enable the second connecting columns 8 and the first connecting columns 7 to provide the longitudinal friction force of the first housing 2 and the second housing 6 after extending out, so that the support structure is more stable after construction is completed.
In this embodiment, be bolted connection between first channel-section steel 3 and the second channel-section steel 4, install rubber circle 10 between first channel-section steel 3 and the second channel-section steel 4, first channel-section steel 3, second channel-section steel 4 and corrugated steel plate 5 are annular structure, and annular structure's first channel-section steel 3, second channel-section steel 4 and corrugated steel plate 5 are through piling up layering construction, not only can simplify the construction step, can guarantee each layer supporting construction's firm degree moreover.
In this embodiment, the diameters of the left and right ends of the first connecting column 7 are all greater than the diameter of the middle part of the first connecting column 7, the diameters of the left and right ends of the second connecting column 8 are all greater than the diameter of the middle part of the second connecting column 8, and gaps exist between the first connecting column 7, the second connecting column 8 and the cylinder body 1, so that the first connecting column 7 and the second connecting column 8 cannot be separated from the device when moving outwards, and the overall stability of the device is enhanced.
In this embodiment, the support assembly 18 includes a first spring 1801 and a second spring 1803 installed in the support plate 13, where the upper and lower sides of the first spring 1801 are respectively connected with the first support post 14 and the support plate 13, the upper and lower sides of the second spring 1803 are respectively connected with the support plate 13 and the second support post 15, a first traction steel rope 1802 is fixedly connected to the first support post 14, a second traction steel rope 1804 is fixedly connected to the second support post 15, the first traction steel rope 1802 and the second traction steel rope 1804 are connected with the connecting block 1806 through guiding wheels 1805, the guiding wheels 1805 are rotatably installed in the support plate 13, the connecting block 1806 and the support plate 13 are mutually attached, when the support plate 13 needs to be installed in the support structure, the connecting block 1806 is pulled, so that the first traction steel rope 1802 and the second traction steel rope 1804 on the guiding wheels 1805 pull the first support post 14 and the second support post 15, the first spring 1801 and the second spring 1803 are compressed until the first support post 14 and the second support post 15 are completely stored in the support plate 13, the first support structure and the second support structure can be automatically released, and the elastic force of the first support structure and the second support structure can be automatically released, and the first support structure and the second support structure can be automatically released.
Specifically, the invention relates to a supporting structure of a foundation of a column pile with an ultra-large diameter and a construction method, wherein firstly, as shown in fig. 1-5, when a strong weathering section is excavated in a foundation pit, a layer of cylinder body 1, a first channel steel 3, a second channel steel 4 and a corrugated steel plate 5 are supported every one section of depth, and grouting is carried out on each two layers of pipe walls. And during field installation, back wires are adopted, and jack correction is performed for fine installation. Each layer of corrugated steel plate 5 is formed by assembling a plurality of corrugated plates in a circumferential direction, and the annular adjacent corrugated plates are connected by welding. After the installation of the annular corrugated plate of the previous layer is completed, the first channel steel 3 and the second channel steel 4 are installed in a web back-to-back flange connection and flange welding connection mode, and joint positions of the corrugated steel plate 5 and the first channel steel 3 and the second channel steel 4 are arranged in a staggered mode in the vertical direction. According to the actual condition of the site, anchor bars are added for temporary fixation, and the first channel steel 3 and the second channel steel 4 are installed by using an electric winch matched with a guide chain.
As shown in fig. 2 to 9, after the installation of the first channel steel 3, the second channel steel 4 and the corrugated steel plate 5 is completed, the plurality of support plates 13 and the rubber plate 16 are installed into the cylinder 1 through the opening 20, before the installation, the connecting block 1806 needs to be pulled first, so that the first traction steel rope 1802 and the second traction steel rope 1804 between the two connected guide wheels 1805 pull the first support column 14 and the second support column 15, so that the first support column 14 moves downwards, the second support column 15 moves upwards, the first springs 1801 and the second springs 1803 are compressed until the first support column 14 and the second support column 15 are completely accommodated into the support plate 13, the support plate 13 is installed into the cylinder 1 through the opening 20, after the connecting block 6 is loosened, under the elastic force of the first springs 1801 and the second springs 1803, the first support column 14 and the second support column 15 automatically extend, the first support column 14 and the second support column 15 support the first channel steel 3 and the second channel steel 4 of the upper layer and the lower layer are supported through the support component 18, and the first channel steel 3 and the second channel steel 4 of the upper layer are supported firmly, and the second channel steel structure is supported, and the first channel steel structure of the lower layer is supported firmly, and the first channel steel structure is supported, and the second channel steel structure is supported, and the layers of the layers are supported firmly, and the structures are supported from the upper layers, and the layers are supported. The first housing 2 and the second housing 6 are welded on the cylinder 1, grouting is performed through the second grouting holes 11 and the first grouting holes 9 on the first housing 2 and the second housing 6, filling fine stone concrete flows into the cylinder 1 through the first through hole 12, the third through hole 19 and the fourth through hole 21, and the cavities of the supporting plate 13 and the inner wall of the cylinder 1 and the cavities of the corrugated steel plate 5 and the inner wall of the cylinder 1 are filled. As the pressure increases gradually, the second connecting posts 8 on the first housing 2 and the first connecting posts 7 on the second housing 6 are gradually supported, so that the inner and outer walls of each layer of cylinder 1 after grouting are automatically raised to increase the longitudinal friction of the supporting structure.
As can be seen from the arrows in fig. 10 and 11, since the interior of the poured cavity is a sealed structure, the air pressure in the poured cavity is gradually increased as the concrete level is gradually increased, and since the concrete has a certain consistency, the concrete and the first and second connection posts 7 and 8 maintain the inclined surfaces in fig. 11 during the pouring process, so that the plurality of first and second connection posts 7 and 8 are pushed outwards as much as possible.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The utility model provides an oversized diameter post foundation supporting structure, includes barrel (1), its characterized in that: the utility model discloses a novel corrugated steel plate structure, which is characterized in that a first outer cover (2) is arranged on the outer side of a barrel body (1), a second outer cover (6) is arranged on the inner wall of the barrel body (1), a first connecting column (7) is arranged on the second outer cover (6), a second connecting column (8) is arranged on the first outer cover (2), a first channel steel (3) is arranged in the barrel body (1), a second channel steel (4) is connected below the first channel steel (3), corrugated steel plates (5) are fixedly connected on the side surfaces of the first channel steel (3) and the second channel steel (4), a supporting plate (13) is arranged in the barrel body (1), the utility model discloses a device for pouring concrete into a concrete body, including a barrel body (1), a first outer cover (2) and a second outer cover (6), wherein a first pillar (14) is slidably arranged above a supporting plate (13), a second pillar (15) is slidably arranged below the supporting plate (13), a rubber plate (16) is arranged between every two adjacent supporting plates (13), a communication groove (17) is formed in the middle of the rubber plate (16), a supporting component (18) is arranged between the first pillar (14) and the second pillar (15), the barrel body (1) is integrated with the first outer cover (2) and the second outer cover (6), a first grouting hole (9) is formed in the top of the second outer cover (6), a second grouting hole (11) is formed in the top of the first outer cover (2), the outer wall of the cylinder body (1) is provided with a first through hole (12), the positions of the first through holes (12) are in one-to-one correspondence with the inward concave positions of the corrugated steel plates (5), the inner wall of the cylinder body (1) is provided with a third through hole (19) and a fourth through hole (21), the positions of the third through hole (19) and the first support column (14) are in mutual correspondence, the positions of the fourth through hole (21) and the second support column (15) are in mutual correspondence, the cylinder body (1) is provided with an opening (20) for the supporting plate (13) to pass through, the width of the opening (20) is larger than that of the supporting plate (13), the opening (20) is positioned on the cylinder body (1) between the third through hole (19) and the fourth through hole (21), the distance between the opening (20) and the corrugated steel plate (5) is larger than the thickness of the supporting plate (13), the diameters of the left end and the right end of the first connecting column (7) are larger than the diameter of the middle part of the first connecting column (7), the diameters of the left end and the right end of the second connecting column (8) are larger than the diameter of the middle part of the second connecting column (8), gaps are reserved between the first connecting column (7), the second connecting column (8) and the cylinder body (1), the supporting component (18) comprises a first spring (1801) and a second spring (1803) which are installed in the supporting plate (13), the upper and lower sides of the first spring (1801) are respectively connected with the first support column (14) and the support plate (13), the upper and lower sides of the second spring (1803) are respectively connected with the support plate (13) and the second support column (15), a first traction steel rope (1802) is fixedly connected to the first support column (14), a second traction steel rope (1804) is fixedly connected to the second support column (15), the first traction steel rope (1802) and the second traction steel rope (1804) are guided by a guide wheel (1805) to be connected with a connecting block (1806), the guide wheel (1805) is rotatably arranged in the support plate (13), the connecting block (1806) and the supporting plate (13) are mutually attached.
2. The foundation support structure for the ultra-large-diameter column pile according to claim 1, wherein the position of the second connecting column (8) on the first housing (2) corresponds to the position of the first connecting column (7) on the second housing (6), and the second connecting column (8) and the first connecting column (7) are distributed on the first housing (2) and the second housing (6) at equal intervals.
3. The foundation supporting structure of the oversized-diameter column pile according to claim 1, wherein the first channel steel (3) and the second channel steel (4) are connected through bolts, a rubber ring (10) is installed between the first channel steel (3) and the second channel steel (4), and the first channel steel (3), the second channel steel (4) and the corrugated steel plate (5) are of annular structures.
4. A construction method of an oversized diameter pile foundation supporting structure, adopting the oversized diameter pile foundation supporting structure of claim 1, characterized by comprising the following steps:
S1: when the foundation pit excavates a strong weathering section, supporting a layer of cylinder body (1), a first channel steel (3), a second channel steel (4) and a corrugated steel plate (5) every time a section of depth is excavated, and grouting pipe walls every two layers
S2: the back wire is adopted during field installation, and the jack is corrected for fine installation;
S3: each layer of corrugated steel plate (5) is formed by assembling a plurality of corrugated plates in a circumferential direction, and annular adjacent corrugated plates are connected by welding and transversely connected by adopting steel plates as connecting plates and flanges;
s4: after the installation of the annular corrugated plate of the previous layer is completed, the first channel steel (3) and the second channel steel (4) are installed in a web back-to-back flange connection and flange welding connection mode, and joint positions of the corrugated steel plate (5) and the first channel steel (3) and the second channel steel (4) are staggered in the vertical direction;
S5: according to the actual situation of the site, anchor bars are added for temporary fixation, and the first channel steel (3) and the second channel steel (4) are installed by using an electric winch matched with a guide chain;
S6: after all the installation is completed, a plurality of support plates (13) and rubber plates (16) are installed in the cylinder body (1), a first support column (14) and a second support column (15) are supported by a support assembly (18), and then the first channel steel (3) and the second channel steel (4) on the upper layer and the lower layer are longitudinally supported by the first support column (14) and the second support column (15);
s7: the first outer cover (2) and the second outer cover (6) are welded on the cylinder body (1) for grouting, and the first connecting column (7) and the second connecting column (8) stretch out after grouting to complete the whole fixing work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410406320.0A CN117988357B (en) | 2024-04-07 | 2024-04-07 | Ultra-large diameter column pile foundation supporting structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410406320.0A CN117988357B (en) | 2024-04-07 | 2024-04-07 | Ultra-large diameter column pile foundation supporting structure and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117988357A CN117988357A (en) | 2024-05-07 |
| CN117988357B true CN117988357B (en) | 2024-06-04 |
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