CN210216398U - Large-scale storage tank bored concrete pile assembled pile cap - Google Patents
Large-scale storage tank bored concrete pile assembled pile cap Download PDFInfo
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- CN210216398U CN210216398U CN201920511408.3U CN201920511408U CN210216398U CN 210216398 U CN210216398 U CN 210216398U CN 201920511408 U CN201920511408 U CN 201920511408U CN 210216398 U CN210216398 U CN 210216398U
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Abstract
The utility model discloses a large-scale storage tank bored concrete pile assembled pile cap, prefabricated pile cap include pile cap upper portion and pile cap lower part, and pile foundation owner muscle through-hole has been seted up at the middle part on pile cap upper portion, and bottom open-ended pile head connecting hole has been seted up at the middle part of pile cap lower part, and pile foundation owner muscle through-hole link up the hollow portion of internal stay that forms to run through in prefabricated pile cap middle part with the pile head connecting hole from top to bottom, and the outside of prefabricated pile cap is passed through the concrete wall and is linked into an organic whole with pile cap upper portion and pile cap lower part. The utility model discloses a large-scale storage tank bored concrete pile assembled pile cap and construction method both reduce construction cycle, have avoided the quality control risk that cast in situ concrete faces, have greatly simplified installation and construction technology again, and then have reduced engineering cost.
Description
Technical Field
The utility model relates to a pile foundation construction technology, concretely relates to large-scale storage tank bored concrete pile assembled pile cap.
Background
With the rapid increase of social energy requirements, the energy storage strategy of China increasingly depends on basic energy storage facilities such as large oil storage tanks, large liquefied natural gas storage tanks and the like. Therefore, the larger the tank capacity of various large storage tanks newly built in China is, the larger the load borne by the storage tank foundation is. In order to weaken the punching effect borne by the storage tank bearing platform, the large-scale storage tank usually adopts the design scheme that the diameter of a concrete cast-in-place pile is increased.
The traditional construction process of the pile cap of the large-diameter cast-in-place pile mainly comprises the following steps: firstly, excavating soil among piles after the construction of the storage tank cast-in-place pile is finished, so that a pile head is exposed out of the ground surface by more than 1 m; then, breaking off the pile head concrete by using an air pick, exposing the pile head reinforcing steel bars and adopting a mechanical sleeve to pile; and finally, hoisting the prefabricated pile cap reinforcement cage in place, and performing cast-in-place and maintenance. The traditional scheme has complex processes, and the processes of excavation of soil between piles, breaking of pile head concrete, pile splicing, maintenance and the like need to consume a large number of construction periods. Typically, a 16-thousand square lng tank outer tank construction period is 14 months, wherein the pile cap construction takes 3 months. In addition, because the concrete needs cast in situ in the traditional scheme, the difficulty of quality control is increased, and a plurality of quality risks exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a large-scale storage tank bored concrete pile assembled pile cap for solve present storage tank bored concrete pile cap construction period long, the complicated and high problem of quality control risk height of process.
The technical scheme of the utility model is that: the pile cap comprises a prefabricated pile cap body, wherein the prefabricated pile cap body comprises a pile cap upper part and a pile cap lower part, a pile foundation main rib through hole used for penetrating through a pile foundation main rib is formed in the middle of the pile cap upper part, a pile head connecting hole used for being connected with a pile head is formed in the middle of the pile cap lower part, the pile foundation main rib through hole and the pile head connecting hole are vertically communicated to form an inner supporting hollow part penetrating through the middle of the prefabricated pile cap body, and the pile cap upper part and the pile cap lower part are connected into a whole through a concrete wall on the outer side of the prefabricated pile cap body; a plurality of pile cap main ribs are embedded in the concrete wall outside the prefabricated pile cap, and extend out of the upper part of the pile cap and expose the end heads; a plurality of grouting channels are reserved at the bottom of the lower part of the pile cap and communicated with the pile head connecting hole;
the pile head connecting hole is used for arranging an adjusting block for adjusting the positions of the precast pile cap and the pile foundation; the inner supporting hollow part is used for penetrating a pile foundation main rib, and the pile foundation main rib through hole is used for filling cast-in-place concrete, so that the pile foundation main rib and the precast pile cap are integrated; the exposed end of the pile cap main rib is used for penetrating into the bearing platform to realize anchoring connection with the bearing platform; the grouting channel is used for injecting grouting material to block the gap of the adjusting block hole behind the adjusting block and strengthen the connection between the precast pile cap and the pile foundation.
Preferably, the multilayer strengthening rib layer has been preset perpendicularly in pile cap upper portion, and every layer of strengthening rib layer includes a plurality of strengthening ribs of horizontal setting, the both ends of strengthening rib with pile cap owner muscle fixed connection, and a plurality of roots on every layer of strengthening rib layer the strengthening rib violently indulges crisscross run through in pile foundation owner muscle through-hole.
Preferably, the reinforcing rib is a hook reinforcing steel bar, and hooks at two ends of the reinforcing rib are connected with the pile cap main rib; every layer the strengthening rib layer includes two horizontal strengthening ribs and two vertical strengthening ribs, horizontal strengthening rib with vertical strengthening rib perpendicular overlap joint, and the overlap joint is located in the pile foundation owner muscle through-hole.
Preferably, the precast pile cap the pile foundation owner muscle through-hole with the pile head connecting hole is the cylinder, the precast pile cap the pile foundation owner muscle through-hole with the cross section diameter of pile head connecting hole is from little to big in proper order: the diameter of the cross section of the pile foundation main reinforcement through hole is smaller than that of the pile head connecting hole is smaller than the outer diameter of the cross section of the prefabricated pile cap.
Preferably, the adjusting block is a concrete cushion block with the same strength as the pile foundation.
The utility model also discloses a construction method of large-scale storage tank bored concrete pile assembled pile cap, storage tank pile foundation reserve when becoming the stake has the pile foundation owner muscle that exposes, adopts foretell large-scale storage tank bored concrete pile assembled pile cap, the construction method of large-scale storage tank bored concrete pile assembled pile cap includes following step:
prefabricating a pile cap: manufacturing a pile cap main rib and a reinforcing rib; manufacturing an inner template of the pile foundation main rib through hole by adopting a PVC (polyvinyl chloride) material circular tube, drilling the inner template and installing the inner template; the reinforcing ribs penetrate through the inner template; adopting a steel template as an outer template of the prefabricated pile cap, and arranging pile cap main ribs in the prefabricated pile cap; binding the reinforcing steel bars, and reserving a grouting channel; pouring and maintaining concrete to obtain a prefabricated pile cap;
hoisting the prefabricated pile cap: hoisting the precast pile cap to enable the pile foundation main reinforcement exposed by the pile foundation to upwards penetrate through the inner supporting hollow part; arranging the adjusting block in the adjusting block hole, and adjusting the height and the position of the precast pile cap on the pile foundation through the adjusting block to enable the top surface of the precast pile cap to be horizontal;
grouting material injection: grouting materials are injected into the grouting channel, the grouting materials flow into the pile head connecting hole along a communicating channel between the grouting channel and the pile head connecting hole, a gap between the adjusting block and the precast pile cap is filled, and a pile foundation main rib which transversely penetrates through the pile head connecting hole is wrapped until the grouting materials fill the whole gap of the pile head connecting hole;
pouring concrete: and filling cast-in-place concrete into the pile foundation main reinforcement through hole to integrate the pile foundation main reinforcement and the precast pile cap.
Preferably, the pile cap prefabrication and the pile foundation construction are carried out simultaneously.
Preferably, the grouting material is epoxy-based high-performance grouting material.
Preferably, the steel reinforcement cage of the pile head of the pile foundation adopts a reducing design.
Preferably, the cross-sectional diameter of the storage tank pile foundation is greater than 1 meter, and the storage tank comprises an oil storage tank, a liquefied natural gas storage tank or a chemical storage tank.
The utility model has the advantages that:
the utility model discloses a large-scale storage tank bored concrete pile assembled pile cap is the prefabricated pile cap of an assembled, can prefabricate in batches during storage tank pile foundation construction, treats that the storage tank pile foundation becomes the pile back and pile cap hoist and mount group to, then fills up the gap between pile cap and pile head through the reservation grout hole of pile cap bottom with grouting material, pours concrete at the pile cap top at last, makes pile foundation and pile cap form an organic whole. Therefore, after the construction of the storage tank pile foundation is completed, the complex procedures of pile-to-pile soil excavation, pile head breaking, pile splicing, in-situ pouring and the like are not needed, and the finished pile caps can be directly hoisted in place in batches, and the grouting and the pouring in batches are carried out. The precast pile cap and the pile foundation construction are carried out simultaneously, the storage tank construction key path is not occupied, the storage tank construction efficiency can be greatly improved by adopting the scheme, and the construction period is shortened. In addition, since the fabricated pile caps can be prefabricated right before the construction of the pile foundations, the quality of the prefabricated concrete members is generally significantly better than that of cast-in-place concrete structures. Compare in current pile cap design and construction scheme, the utility model discloses a large-scale storage tank bored concrete pile assembled pile cap and construction method both reduce construction cycle, have avoided the quality control risk that cast in situ concrete faces, have greatly simplified installation and construction technology again, and then have reduced engineering cost.
Furthermore, the utility model discloses the advantage that has also one has:
(1) the pile caps are processed in a precast yard, so that the maintenance environment is good, the construction quality of concrete is improved, the concrete cracks of the pile caps are reduced, and the structural durability is improved;
(2) the precast pile cap (1) adopts epoxy-based high-performance grouting material to improve the structural strength of the construction joint;
(3) the PVC inner template is convenient to punch and the reinforcing ribs are convenient to install;
(4) the PVC inner template has excellent pressure measuring resistance and low manufacturing cost;
(5) the precast pile cap is convenient to hoist and position, and the installation precision is improved.
Drawings
Fig. 1 is a vertical sectional view of a pile cap provided in embodiment 1 of the present invention;
fig. 2 is a top view of a pile cap provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a PVC inner form provided in embodiment 1 of the present invention;
fig. 4 is a schematic view of connection between a pile cap and a pile foundation provided in embodiment 1 of the present invention.
Detailed Description
Example 1
Referring to fig. 1, 2 and 4, the large-scale storage tank cast-in-place pile assembled pile cap comprises a prefabricated pile cap 1, the prefabricated pile cap 1 comprises a pile cap upper part 2 and a pile cap lower part 3, a pile foundation main reinforcement through hole 21 is formed in the middle of the pile cap upper part 2, a pile head connecting hole 31 with an open bottom end is formed in the middle of the pile cap lower part 3, the pile foundation main reinforcement through hole 21 and the pile head connecting hole 31 are vertically communicated to form an inner supporting hollow part penetrating through the middle of the prefabricated pile cap 1, and the pile cap upper part 2 and the pile cap lower part 3 are connected into a whole through a concrete wall on the outer side of the prefabricated pile cap 1; a plurality of pile cap main ribs 4 are embedded in the concrete wall outside the prefabricated pile cap 1, and the pile cap main ribs 4 extend out of the upper part 2 of the pile cap and expose the end heads; a plurality of grouting channels 5 are reserved at the bottom of the lower part 3 of the pile cap, and the grouting channels 5 are communicated with the adjusting block holes 31;
the pile head connecting hole 31 is used for arranging an adjusting block 6 for adjusting the positions of the precast pile cap 1 and the pile foundation 100; the inner supporting hollow part is used for penetrating the pile foundation main reinforcement 7, and the pile foundation main reinforcement through hole 21 is used for filling cast-in-place concrete 8, so that the pile foundation main reinforcement 7 and the precast pile cap 1 are integrated; the exposed end of the pile cap main rib 4 is used for penetrating into the bearing platform to realize anchoring connection with the bearing platform; the grouting channel 5 is used for injecting grouting material 9 to block the gap of the pile head connecting hole 31 after the adjusting block 6 is arranged and strengthen the connection between the prefabricated pile cap 1 and the pile foundation 100.
As a specific implementation mode, multiple reinforcing rib layers are vertically preset in the pile cap upper portion 2, each reinforcing rib layer comprises a plurality of horizontally arranged reinforcing ribs 22, two ends of each reinforcing rib 22 are fixedly connected with the pile cap main ribs 4, and the plurality of reinforcing ribs 22 on each reinforcing rib layer transversely and longitudinally penetrate through the pile foundation main rib through holes 21 in a staggered manner.
Furthermore, the reinforcing ribs 22 are hook reinforcing steel bars, and hooks at two ends of the reinforcing ribs 22 are connected with the pile cap main ribs 4; every row of strengthening rib layer includes two horizontal strengthening ribs and two vertical strengthening ribs, and horizontal strengthening rib forms the strengthening rib 22 of "well" font with vertical strengthening rib vertical overlap joint, and the overlap joint is located pile foundation owner muscle through-hole 21.
Preferably, precast pile cap 1, pile foundation owner muscle through-hole 21 and pile head connecting hole 31 are the cylinder, and the cross section diameter of precast pile cap 1, pile foundation owner muscle through-hole 21 and pile head connecting hole 31 is from little to big in proper order: the diameter of the cross section of the pile foundation main reinforcement through hole 21 is less than that of the pile head connecting hole 31 and less than the outer diameter of the cross section of the prefabricated pile cap 1. Specifically, the outer diameter of the pile cap is generally 1.8m, the outer diameter of the pile is about 1.2m, the diameter of the pile head connecting hole 31 is 1.3m, the diameter of the pile foundation main reinforcement through hole 21 is about 0.8m, and the diameters of the above holes are the diameters of the holes and can be adjusted according to different projects.
In order to improve the installation accuracy of the prefabricated pile cap 1, when the top of the prefabricated pile cap is placed in a hoisting mode to be positioned, the adjusting block hole 31 is provided with the adjusting block 6, the prefabricated pile cap 1 and the pile foundation 100 are adjusted through the adjusting block 6, and the adjusting block 6 is a concrete cushion block with the same strength as the pile foundation 100.
Because 2 need wear strengthening rib 22 on pile cap upper portion, in order to guarantee that pile foundation owner muscle through-hole 21 is sufficient intensity to resist concrete lateral pressure and convenient drilling, the shaping of pile cap upper portion 2 need be with the help of inner formword 10, before prefabricated pile cap 1 pours promptly, set up this inner formword 10 in the inboard of prefabricated pile cap 1, adopt repeatedly usable's steel template as the prefabricated exterior sheathing of pile cap and adopt PVC material pipe as inner formword 10 simultaneously, so, still be convenient for install horizontal "well" font strengthening rib 22.
Referring to fig. 3, the inner form 10 is a cylindrical tube, and a hard tube made of PVC is used, and has sufficient compressive strength, and the hard tube made of PVC is convenient for punching and installing the reinforcing rib 22 shaped like a Chinese character 'jing'.
Example 2
prefabricating a pile cap: manufacturing a pile cap main rib 4 and a reinforcing rib 22; manufacturing an inner template 10 of a pile foundation main reinforcement through hole 21 by adopting a PVC (polyvinyl chloride) material circular tube, drilling the inner template 10 and installing the inner template 10; reinforcing ribs 22 penetrate through the inner template 10; adopting a steel template as an outer template of the prefabricated pile cap 1, and arranging pile cap main ribs 4 in the prefabricated pile cap 1; binding the reinforcing steel bars, and reserving a grouting channel 5; pouring and maintaining concrete to obtain a prefabricated pile cap 1;
hoisting the prefabricated pile cap: hoisting the precast pile cap 1 to enable the pile foundation main reinforcement 7 exposed by the pile foundation 100 to upwards penetrate through the inner supporting hollow part; arranging an adjusting block 6 in the pile head connecting hole 31, adjusting the height and the position of the precast pile cap 1 on the pile foundation 100 through the adjusting block 6 to enable the top surface of the precast pile cap 1 to be horizontal, and finishing the accurate positioning of the precast pile cap 1;
grouting material injection: grouting material 9 is injected into the grouting channel 5, the grouting material 9 flows into the pile head connecting hole 31 along a communicating channel between the grouting channel 5 and the pile head connecting hole 31, and a gap between the adjusting block 6 and the precast pile cap 1 is filled, and a pile foundation main rib 7 which transversely penetrates through the pile head connecting hole 31 is wrapped until the grouting material fills the whole gap between the pile head connecting holes 31;
pouring concrete: and filling the cast-in-place concrete 8 with the same strength as the concrete of the pile foundation 100 into the pile foundation main reinforcement through hole 21, and pouring the residual area by using the cast-in-place concrete 8 to integrate the pile foundation main reinforcement 7 with the precast pile cap 1, finishing all processes after the maintenance is finished, and carrying out the construction of the bearing platform.
Preferably, the pile cap prefabrication is performed simultaneously with the pile foundation 100 construction.
Preferably, the grout 9 is an epoxy-based high performance grout.
Preferably, the reinforcement cage of the pile head of the pile foundation 100 adopts a reducing design, and specifically, the diameter of the reinforcement cage of the pile head area of the pile foundation 100 should be smaller than the minimum inner diameter of the prefabricated pile cap 1. For this purpose, the pile foundation main reinforcement 7 is bent at the top of the pile head cage so that the pile foundation main reinforcement 7 can pass through the inner hollow portion of the precast pile cap 1 and the reinforcing ribs 22.
Preferably, the cross-sectional diameter of the storage tank pile foundation 100 is greater than 1m, and the storage tank includes an oil storage tank, a liquefied natural gas storage tank, or a chemical storage tank.
Preferably, during the pile cap prefabrication, the hardening and leveling of the storage tank area site should be completed after the pile foundation construction is completed.
Preferably, when the precast pile cap 1 is hoisted, a truck crane or a tower crane is adopted to install the finished precast pile cap 1 in place, and the adjusting block 6 is adopted to adjust the positions of the pile cap and the pile foundation in the in-place process.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. An assembled pile cap of a large storage tank cast-in-place pile is characterized by comprising a prefabricated pile cap (1), wherein the prefabricated pile cap (1) comprises a pile cap upper part (2) and a pile cap lower part (3),
the middle part of the upper part (2) of the pile cap is provided with a pile foundation main reinforcement through hole (21), the middle part of the lower part (3) of the pile cap is provided with a pile head connecting hole (31) with an opening at the bottom end, the pile foundation main reinforcement through hole (21) and the pile head connecting hole (31) are communicated up and down to form an inner supporting hollow part penetrating through the middle part of the precast pile cap (1), and the outer side of the precast pile cap (1) is used for connecting the upper part (2) of the pile cap and the lower part (3) of the pile cap into a whole through a concrete wall;
a plurality of pile cap main ribs (4) are embedded in the concrete wall on the outer side of the prefabricated pile cap (1), and the pile cap main ribs (4) extend out of the upper part (2) of the pile cap and expose end heads;
a plurality of grouting channels (5) are reserved at the bottom of the lower part (3) of the pile cap, and the grouting channels (5) are communicated with the pile head connecting hole (31);
the pile head connecting hole (31) is used for arranging an adjusting block (6) for adjusting the positions of the precast pile cap (1) and the pile foundation (100);
the inner supporting hollow part is used for penetrating a pile foundation main rib (7), and the pile foundation main rib through hole (21) is used for filling cast-in-place concrete (8), so that the pile foundation main rib (7) and the precast pile cap (1) are integrated;
the exposed end of the pile cap main rib (4) is used for penetrating into the bearing platform to realize anchoring connection with the bearing platform;
the grouting channel (5) is used for injecting grouting material (9) to block the gap of the pile head connecting hole (31) behind the adjusting block (6) and strengthen the connection between the precast pile cap (1) and the pile foundation (100).
2. A large storage tank cast-in-place pile fabricated pile cap as recited in claim 1,
the utility model discloses a pile foundation, including pile cap upper portion (2), the vertical multilayer strengthening rib layer that has preset in pile cap upper portion (2), every layer of strengthening rib layer includes a plurality of strengthening ribs (22) of horizontal setting, the both ends of strengthening rib (22) with pile cap owner muscle (4) fixed connection, and a plurality of roots on every layer of strengthening rib violently indulge crisscross run through in pile foundation owner muscle through-hole (21).
3. A large storage tank cast-in-place pile fabricated pile cap as recited in claim 2,
the reinforcing ribs (22) are hook reinforcing steel bars, and hooks at two ends of each reinforcing rib (22) are connected with the pile cap main ribs (4);
every row the strengthening rib layer includes two horizontal strengthening ribs and two vertical strengthening ribs, horizontal strengthening rib with vertical strengthening rib perpendicular overlap joint, and the overlap joint is located in pile foundation owner muscle through-hole (21).
4. A large storage tank cast-in-place pile fabricated pile cap as recited in claim 1,
the precast pile cap (1), the pile foundation main reinforcement through hole (21) and the pile head connecting hole (31) are all cylinders,
precast pile cap (1) pile foundation owner muscle through-hole (21) with the cross section diameter of pile head connecting hole (31) is from little to big to be in proper order: the cross section diameter of the pile foundation main reinforcement through hole (21) is less than that of the pile head connecting hole (31) is less than that of the outer wall of the precast pile cap (1).
5. A large storage tank cast-in-place pile fabricated pile cap as recited in claim 1,
the adjusting block (6) is a concrete cushion block with the same strength as the pile foundation (100).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920511408.3U CN210216398U (en) | 2019-04-16 | 2019-04-16 | Large-scale storage tank bored concrete pile assembled pile cap |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920511408.3U CN210216398U (en) | 2019-04-16 | 2019-04-16 | Large-scale storage tank bored concrete pile assembled pile cap |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989395A (en) * | 2019-04-16 | 2019-07-09 | 中海石油气电集团有限责任公司 | A kind of large-scale storage tank bored concrete pile assembled pile cover and its construction method |
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2019
- 2019-04-16 CN CN201920511408.3U patent/CN210216398U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989395A (en) * | 2019-04-16 | 2019-07-09 | 中海石油气电集团有限责任公司 | A kind of large-scale storage tank bored concrete pile assembled pile cover and its construction method |
| CN109989395B (en) * | 2019-04-16 | 2024-02-06 | 中海石油气电集团有限责任公司 | Large storage tank filling pile assembled pile cap and construction method thereof |
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