CN210459194U - Assembly type circular pile structure - Google Patents
Assembly type circular pile structure Download PDFInfo
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- CN210459194U CN210459194U CN201921210168.XU CN201921210168U CN210459194U CN 210459194 U CN210459194 U CN 210459194U CN 201921210168 U CN201921210168 U CN 201921210168U CN 210459194 U CN210459194 U CN 210459194U
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Abstract
The utility model discloses an assembled circular pile structure, which comprises an underground section positioned in a circular pile hole, wherein a filling layer is arranged between the underground section and the pile hole, the underground section comprises a plurality of prefabricated standard units which are mutually assembled, and each prefabricated standard unit is a circular section; every prefabricated standard cell all is provided with the preformed hole, and all prefabricated standard cells have the prestressing tendons through the preformed hole is run through, and two adjacent prefabricated standard cell's junction all is equipped with the shear force key. The construction method of the circular pile structure comprises the steps of mechanically excavating a circular pile hole, and arranging a slurry retaining wall in the circular pile hole; assembling the prefabricated standard units, and penetrating the prestressed tendons in the reserved holes to form the underground section; tensioning and hoisting the prestressed tendons to form an integral member for the underground section, and hoisting the underground section into the pile hole; cleaning a slurry retaining wall, and filling filler in a gap between the underground section and the pile hole by adopting a conduit method to tightly combine the underground section and the pile hole; and applying prestress to seal the anchor by adopting a post-tensioning method.
Description
Technical Field
The utility model relates to an assembly type structure technical field, in particular to circular pile structure of assembled.
Background
Pile structures are used very widely and are generally used in civil engineering in the following fields: 1) the supporting structure is used as a roadbed filling section supporting structure, forms a pile plate structure with the soil retaining plate and has the function of resisting soil pressure to keep the roadbed structure stable; 2) the anti-slide pile is used as an anti-slide pile in a landslide section to resist landslide thrust, and a reinforced slide body keeps landslide stability.
The traditional slide-resistant pile is of a cast-in-place rectangular structure and is formed by manual hole digging and cast-in-place forming. In railway and highway engineering of steep slope sections in some alpine and high-altitude mountain areas, if a traditional construction process is adopted, the following problems can be caused: 1) the cast-in-place concrete needs to be poured by a vertical template and is difficult to maintain (air drying, extremely low temperature and strong ultraviolet rays), so that the quality is difficult to ensure, the construction progress is seriously influenced, and the construction period is prolonged; 2) the hole is dug manually and a reinforced concrete dado needs to be arranged, so that the safety risk is high, the efficiency is low, and the operation is not allowed to be performed manually (in an anoxic and narrow environment) above the altitude of 2km by taking the Sichuan-Tibet railway as an example.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, provide a circular stake structure of assembled.
In order to achieve the purpose of the invention, the utility model provides the following technical scheme:
an assembled circular pile structure comprises an underground section positioned in a circular pile hole, wherein a filling layer is arranged between the underground section and the pile hole, the underground section comprises a plurality of prefabricated standard units which are mutually assembled, and each prefabricated standard unit is of a circular section;
every prefabricated standard cell all is provided with the preformed hole, all prefabricated standard cell has the prestressing tendons through the preformed hole runs through, and adjacent two prefabricated standard cell's junction all is equipped with the shear force key.
Circular pile structure of assembled, can be at the prefabricated standard cell of factory's prefabricated production, assemble on the spot and can the shaping, adopt the assembled structure, solved cast in situ concrete and needed the formwork erection to pour and the difficult problem of maintenance, and guaranteed construction quality, can accelerate the construction progress. On the other hand, the utility model discloses owing to adopted prefabricated standard cell and be equipped with the filling layer, more current cast-in-place scheme can reduce the requirement to stake hole excavation precision, can directly adopt mechanical equipment to excavate circular stake hole, has solved the manual work and has dug the problem that hole safety risk is high, inefficiency, can further improve the efficiency of construction. Finally, the utility model solves the problems of weak stress and poor durability of the joint of the assembly structure and solves the problem that the large mechanical hole digging can not be completely matched with the pile structure size by arranging the filling layer; through setting up the shear force key, satisfy the shear strength demand.
Preferably, the pile structure further comprises an upper ground section located above the pile hole, the upper ground section is connected with the lower ground section, the upper ground section is formed by assembling a plurality of prefabricated standard units, and the prefabricated standard units are provided with outer convex parts used for installing retaining plates.
The utility model discloses a set up outer convex part in the pile structure, solved the problem of fender apron attachment strap difficulty, pile structure and fender apron cooperation form the pile slab structure, can effectively resist soil pressure and keep roadbed stable in structure.
Preferably, the external convex part and the prefabricated standard unit are integrally formed structural parts, and can be directly prefabricated and processed in a factory, so that the field construction procedures are reduced, and the construction progress is accelerated.
Preferably, the filling material adopted by the filling layer comprises concrete and/or cement and waste slag mixture, and has quick setting and micro-expansibility. In order to save cost and construction period, the filler is made of materials which are cheap and are beneficial to maintenance as much as possible.
Preferably, each prefabricated standard unit all includes the body this internal preformed groove that is equipped with indulges the muscle, indulge the muscle and stretch out the body to stretch into adjacent prefabricated standard unit's preformed groove in, connect through the grout. The longitudinal bars are connected between the two adjacent standard prefabricated units, so that the anti-seismic performance of the structure can be improved.
Preferably, the body is provided with a female head end and a male head end. The female head end is provided with a plurality of the reserved grooves, the side surface of each reserved groove is provided with a double-layer steel bar structure, and a first grouting sleeve is further arranged in each reserved groove; public head end is equipped with the same quantity of the muscle of indulging of reservation groove, and every one end of indulging the muscle with double-deck steel bar structure is connected, and the other end stretches out this is external, and stretches out this external length with state the high looks adaptation in reservation groove, public head end still is equipped with second grout sleeve in every muscle department of indulging, second grout sleeve's cross section size with first grout sleeve's cross section size looks adaptation, second grout sleeve can insert in the first grout sleeve.
The grouting sleeve technology is utilized to solve the longitudinal connection problem between the prefabricated standard units, and the bending resistance stress requirement of the section of the component is met by configuring the longitudinal ribs. The first grouting sleeve and the second grouting sleeve are matched, and the flat section and the inclined section are guaranteed to have enough shear resistance. The stirrup is an effective measure for shearing of the oblique section, and the unit joint can be provided with the stirrup for reinforcement according to actual conditions. The bending resistance of the member can be further improved by designing a double-layer steel bar structure to be connected with the longitudinal bars.
Preferably, the first grouting sleeve and the second grouting sleeve are in interference fit connection, and the shear resistance is further improved.
Preferably, first grout sleeve and second grout sleeve are integral grout sleeve, are located female head end all first grout sleeve is prefabricated into the integral steel structure, is located public head end all second grout sleeve is prefabricated into the integral steel structure to directly pre-buried at this internal.
Compared with the existing mode that one set of grouting sleeve can only be connected with one energy-consuming steel bar, the integral grouting sleeve has the advantages that the size and the position of the box chamber are reasonably arranged, the size of the box chamber can be only slightly larger than longitudinal bars or prestressed bars to be connected, the steel bar blocking condition at the splicing joint of the grouting sleeve can be greatly improved, the energy-consuming steel bar arrangement can be greatly encrypted, and the anti-seismic energy-consuming performance of the pile structure is improved.
Preferably, integral grout sleeve includes inner wall and outer wall be connected with a plurality of division board between inner wall and the outer wall to form a plurality of case room, every case room can be used to connect a vertical bar or prestressing tendons, inner wall, outer wall and division board are steel sheet structure.
Preferably, the partition plate is provided with a communication hole which enables all the chambers to be communicated with each other. All longitudinal bars or prestressed bars of two adjacent prefabricated standard units can be connected only by one-time construction, the construction process is simple, the construction time can be saved, and the construction quality is improved.
Preferably, one end of the double-layer steel bar structure is connected with the longitudinal bar through a steel bar connecting joint; or the interval between the double-layer steel bar structure is gradually reduced, and one end of the double-layer steel bar structure is connected with the longitudinal bars in a welding mode.
Preferably, the number of the longitudinal bars and the prestressed bars arranged on the soil retaining side of each prefabricated standard unit is greater than that of the non-soil retaining side, and at least two rows of the longitudinal bars are arranged on the soil retaining side along the radial direction, so that the requirement of transverse stress is met.
The utility model also discloses a method of constructing assembled circular pile structure, construct an assembled circular pile structure, including following step:
the method comprises the following steps: adopting machinery to excavate a circular pile hole, and adopting slurry to protect a wall in the circular pile hole;
step two: assembling the prefabricated standard units, and penetrating and hoisting the prestressed tendons and the longitudinal stressed prestressed tendons in the reserved holes to form the underground section;
step three: tensioning and hoisting the prestressed tendons to form an integral member at the underground section;
step four: integrally hoisting the underground section into the pile hole;
step five: cleaning a slurry retaining wall, and filling filler in a gap between the underground section and the pile hole by adopting a conduit method to tightly combine the underground section and the pile hole;
step six: and applying prestress to seal the anchor by adopting a post-tensioning method.
The construction method of the utility model adopts machinery to excavate the circular pile hole, thus solving the problems of high safety risk and low efficiency of manual hole excavation; the form of prefabricating standard units in factories and assembling on site is adopted, so that the construction quality can be improved, and the construction process is accelerated; a sectional tension prestress method is adopted, so that the stable structure in the hoisting process is ensured; the problem of durability of the connecting piece and the problem of contact between the underground section and the foundation are solved by adopting a conduit method for grouting and sealing.
Preferably, between step five and step six, the method further comprises the following steps:
loosening and hoisting the prestressed anchorage device, and coating epoxy resin on the joint between the underground section and the ground section;
and assembling the prefabricated standard units, and penetrating the prestressed tendons in the reserved holes to form an upper section until the designed height position is reached. The assembled ground section can be matched with a soil retaining plate to form a pile plate structure.
Preferably, when the prefabricated standard units are assembled, grouting and vibrating the prefabricated standard units in the reserved grooves of one prefabricated standard unit to be compact, inserting the second grouting sleeve of the other prefabricated standard unit into the first grouting sleeve of the prefabricated standard unit, and inserting the longitudinal ribs of the other prefabricated standard unit into the reserved grooves.
Compared with the prior art, the circular stake structure of assembled beneficial effect:
circular pile structure of assembled, can be at the prefabricated standard cell of factory's prefabricated production, assemble on the spot and can the shaping, adopt the assembled structure, solved cast in situ concrete under the extremely cold condition and need found the problem that the template was pour and the maintenance difficulty, solve the problem that the poured concrete quality is difficult to guarantee under water, guaranteed construction quality, can accelerate the construction progress. On the other hand, the utility model discloses owing to adopted prefabricated standard cell and be equipped with the filling layer, more current cast-in-place scheme can reduce the requirement to stake hole excavation precision, can directly adopt mechanical equipment to excavate circular stake hole, has solved the manual work and has dug the problem that hole safety risk is high, inefficiency, can further improve the efficiency of construction. Finally, the utility model solves the problems of weak stress and poor durability of the joint of the assembly structure and solves the problem that the large mechanical hole digging can not be completely matched with the pile structure size by arranging the filling layer; the waste slag is adopted as a filling material for recycling, so that the method is more environment-friendly.
Compared with the prior art, the beneficial effect of the method of constructing assembled circular pile structure:
the construction method of the utility model adopts machinery to excavate the circular pile hole, thus solving the problems of high safety risk and low efficiency of manual hole excavation; the form of prefabricating standard units in factories and assembling on site is adopted, so that the construction quality can be improved, and the construction process is accelerated; a sectional tension prestress method is adopted, so that the stable structure in the hoisting process is ensured; the problem of durability of the connecting piece and the problem of contact between the underground section and the foundation are solved by adopting a conduit method for grouting and sealing.
Description of the drawings:
fig. 1 is a sectional view of an underground section according to embodiment 1 of the present invention.
Fig. 2 is a cross-sectional view of an assembled circular pile structure according to embodiment 1 of the present invention.
Fig. 3 is an elevation view of an assembled circular pile structure according to embodiment 1 of the present invention.
Fig. 4 is a cross-sectional view of the upper section according to embodiment 2 of the present invention.
Fig. 5 is an elevation view of an assembled circular pile structure according to embodiment 2 of the present invention.
Fig. 6 is a cross-sectional view of a prefabricated standard cell according to embodiment 3 of the present invention.
Fig. 7 is an elevation view of a prefabricated standard cell according to embodiment 3 of the present invention.
Fig. 8 is an assembly diagram of the prefabricated standard cell according to embodiment 3 of the present invention.
The labels in the figure are: 0-pile hole, 1-underground section, 11-prefabricated standard unit, 110-body, 111-female head end, 112-male head end, 2-filling layer, 3-retaining wall, 4-first grouting sleeve, 5-preformed groove, 6-double-layer steel bar structure, 7-longitudinal bar, 8-second grouting sleeve, 9-upper section, 10-external convex part, 12-retaining plate, 13-separating plate, 14-prestressed bar, 15-vertical steel bar, 16-stirrup, 17-inner wall, 18-outer wall, 19-first shear key and 20-second shear key.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-2, an assembled circular pile structure includes an underground section 1 located in a circular pile hole 0, a filling layer 2 is disposed between the underground section 1 and the circular pile hole 0, and a filling material adopted by the filling layer 2 includes concrete and/or a mixture of cement and waste slag.
The underground section 1 is of a hollow circular pile structure and comprises a plurality of prefabricated standard units 11 which are assembled with one another, and each prefabricated standard unit 11 is of a circular cross section. Vertical steel bars 15 and stirrups 16 are arranged in each prefabricated standard unit 11, each prefabricated standard unit 11 is reserved with a reserved hole, and prestressed tendons 14 penetrate through the prefabricated standard units 11.
In order to meet the requirement on shear strength, a shear key is arranged at the joint of two adjacent prefabricated standard units 11, specifically, as shown in fig. 3, the shear key may include a first shear key 19 arranged at the female head end, the first shear key 19 is a concave structure, and further includes a second shear key 20 arranged at the male head end, the second shear key 20 is a convex structure, and the first shear key 19 and the second shear key 20 are matched.
Preferably, in order to improve the performance against the soil pressure, the prestressing tendons are densified near the area where landslide may occur, i.e., the soil retaining side against the soil pressure, a plurality of rows of the prestressing tendons 14 are arranged along the radial direction of the circular pile, and the sectional size of the prestressing tendons 14 is increased.
The construction of the assembled circular pile structure comprises the following steps:
the method comprises the following steps: adopting machinery to excavate a circular pile hole 0, and arranging a slurry retaining wall 3 in the circular pile hole 0;
step two: assembling a prefabricated standard unit 11, and penetrating a prestressed tendon 14 (comprising a hoisting prestressed tendon and a longitudinal stress prestressed tendon) in a reserved hole to form a lower underground section 1;
step three: tensioning and hoisting the prestressed tendons to enable the underground section 1 to form an integral component;
step four: integrally hoisting and putting the assembled underground section 1 into the pile hole 0;
step five: cleaning a slurry retaining wall 3, and filling a filler into a gap between the underground section 1 and the pile hole 0 by adopting a conduit method to tightly combine the underground section 1 and the pile hole 0;
step six: and applying prestress to seal the anchor by adopting a post-tensioning method.
Example 2
As shown in fig. 4 to 5, the present embodiment is different from embodiment 1 in that the circular pile structure further includes an upper ground section 9 located above the pile hole 0, the upper ground section 9 is connected to the lower ground section 1, the upper ground section 9 is assembled by a plurality of prefabricated standard units 11, and integrally formed male protrusions 10 are provided on the prefabricated standard units 11, and the male protrusions 10 are square bosses and can be used for installing a soil guard 12.
The construction of the assembled circular pile structure comprises the following steps:
the method comprises the following steps: adopting machinery to excavate a circular pile hole 0, and arranging a slurry retaining wall 3 in the circular pile hole 0;
step two: assembling a prefabricated standard unit 11, and penetrating a prestressed tendon 14 (comprising a hoisting prestressed tendon and a longitudinal stress prestressed tendon) in a reserved hole to form a lower underground section 1;
step three: tensioning and hoisting the prestressed tendons to enable the underground section 1 to form an integral component;
step four: integrally hoisting and putting the assembled underground section 1 into the pile hole 0;
step five: cleaning a slurry retaining wall 3, and filling a filler into a gap between the underground section 1 and the pile hole 0 by adopting a conduit method to tightly combine the underground section 1 and the pile hole 0;
step six: loosening and hoisting the prestressed anchorage device, and coating epoxy resin on the joint between the underground section 1 and the upper section 9;
step seven: assembling the prefabricated standard units 11 when the strength of the filler reaches more than 70%, and penetrating the prestressed tendons 14 in the reserved holes to form an upper ground section 9 until the designed height position is reached;
step eight: after the assembly is finished, applying prestress to seal the anchor by adopting a post-tensioning method;
step nine: repeating the steps one to eight, and after all or part of the pile structures are constructed, starting to build a soil retaining plate, wherein the soil retaining plate can be a prefabricated reinforced concrete plate or a greening vegetation plate for greening;
step ten: and filling soil after filling the plates to form a whole body of the roadbed structure and the pile structure.
Example 3
In order to improve the seismic performance of the pile structure, the present embodiment mainly improves the prefabricated standard cells 11 described in embodiments 1 and 2, specifically:
as shown in fig. 6-7, each prefabricated standard cell 11 includes a body 110, and a female head end 111 and a male head end 112 are provided on the body 110;
the female head end 111 is provided with a plurality of double-layer steel bar structures 6 along the circumferential direction, the male head end 112 is provided with longitudinal bars 7 of the same number along the circumferential direction, each double-layer steel bar structure 6 is correspondingly connected with one longitudinal bar 7, each double-layer steel bar structure 6 forms a reserved groove 5, each longitudinal bar 7 extends out of the body 110, the length of the longitudinal bar 7 extending out of the body 110 is matched with the height of the reserved groove 5, the cross section size of each longitudinal bar 7 is matched with the cross section size of the reserved groove 5, and the longitudinal bar 7 can be inserted into the reserved groove 5;
One end of the double-layer steel bar structure 6 is connected with the longitudinal bar 7 through a steel bar connecting joint; or the interval between double-layer steel bar structure 6 is the convergent setting, double-layer steel bar structure 6's one end with indulge muscle 7 welded connection.
The number of the double-layer steel bar structures 6 and the longitudinal bars 7 arranged on the soil retaining side of each prefabricated standard unit 11 is larger than that of the non-soil retaining side, and at least two rows of the double-layer steel bar structures 6 and the longitudinal bars 7 are arranged on the soil retaining side along the radial direction. As shown in fig. 6, two rows of the double-layered reinforcing structure 6, the longitudinal beads 7 are arranged on the soil retaining side, and only one row is arranged on the non-soil retaining side.
The first grouting sleeve 4 and the second grouting sleeve 8 may be conventional grouting sleeves, that is, each grouting sleeve may be connected to a reinforcing bar, or may be an integral grouting sleeve, as shown in fig. 6, all the first grouting sleeves 4 of the female end 111 are connected to form an integral steel structure, and the integral steel structure is integrally embedded in the body 110, thereby facilitating construction. All the second grouting sleeves 8 of the male end 112 are prefabricated into an integral steel structure and are directly embedded in the body 110.
The integral grouting sleeve comprises an inner wall 17 and an outer wall 18, wherein a plurality of partition plates 13 are connected between the inner wall 17 and the outer wall 18, so that a plurality of box chambers are formed, each box chamber can be used for being connected with a longitudinal rib or a prestressed rib, and the inner wall 17, the outer wall 18 and the partition plates 13 are all of steel plate structures.
Preferably, the partition plate is provided with a communication hole which enables all the chambers to communicate with each other, thereby improving grouting efficiency.
In addition, the prefabricated standard unit 11 adopted in the embodiment is provided with the first grouting sleeve 4 and the second grouting sleeve 8 which are matched with each other, and the assembly of the first grouting sleeve and the second grouting sleeve can generate certain shearing resistance, so that a shearing force key is not required to be arranged.
As shown in fig. 8, when assembling the prefabricated standard units 11, grouting and vibrating the prefabricated standard units 11 into the pre-fabricated groove 5, inserting the second grouting sleeve 8 of another prefabricated standard unit 11 into the first grouting sleeve 4 of the prefabricated standard unit 11, and inserting the longitudinal rib 7 of another prefabricated standard unit 11 into the pre-fabricated groove 5.
The above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and therefore, any modification or equivalent replacement may be made to the present invention; all technical solutions and modifications without departing from the spirit and scope of the present invention should be covered by the claims of the present invention.
Claims (7)
1. An assembled circular pile structure is characterized by comprising an underground section positioned in a circular pile hole, wherein a filling layer is arranged between the underground section and the pile hole, the underground section comprises a plurality of prefabricated standard units which are mutually assembled, and each prefabricated standard unit is of a circular section;
every prefabricated standard cell all is provided with the preformed hole, all prefabricated standard cell has the prestressing tendons through the preformed hole runs through, and adjacent two prefabricated standard cell's junction all is equipped with the shear force key.
2. The circular pile structure of claim 1, further comprising an above-ground section located above the pile hole, the above-ground section being connected to the underground section, the above-ground section being assembled from a plurality of the prefabricated standard units, and an external protrusion being provided on the prefabricated standard units, the external protrusion being used for installing a soil guard plate.
3. The circular pile structure of claim 2, wherein the male portion is an integrally formed structural member with the prefabricated standard unit.
4. An assembled circular pile structure according to any one of claims 1 to 3, wherein each prefabricated standard unit comprises a body, a preformed groove and a longitudinal rib are arranged in the body, and the longitudinal rib extends out of the body, extends into the preformed groove of an adjacent prefabricated standard unit and is connected through grouting.
5. The circular pile structure of claim 4, wherein the body is provided with a female end and a male end,
the female head end is provided with a plurality of the reserved grooves, the side surface of each reserved groove is provided with a double-layer steel bar structure, and a first grouting sleeve is further arranged in each reserved groove; public head end is equipped with the same quantity of the muscle of indulging of reservation groove, and every one end of indulging the muscle with double-deck steel bar structure is connected, and the other end stretches out this is external, and stretches out this external length with state the high looks adaptation in reservation groove, public head end still is equipped with second grout sleeve in every muscle department of indulging, second grout sleeve's cross section size with first grout sleeve's cross section size looks adaptation, second grout sleeve can insert in the first grout sleeve.
6. The fabricated circular pile structure according to claim 5, wherein one end of the double-layered steel reinforcement structure is connected to the longitudinal bar by a steel reinforcement coupling joint; or the interval between the double-layer steel bar structure is gradually reduced, and one end of the double-layer steel bar structure is connected with the longitudinal bars in a welding mode.
7. An assembled circular pile structure according to claim 4, wherein each of the prefabricated standard units has a greater number of the longitudinal bars, the pre-stressed bars arranged on a soil-retaining side than on a non-soil-retaining side, and at least two rows of the longitudinal bars are arranged in a radial direction on the soil-retaining side.
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| CN201921210168.XU CN210459194U (en) | 2019-07-29 | 2019-07-29 | Assembly type circular pile structure |
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| CN201921210168.XU CN210459194U (en) | 2019-07-29 | 2019-07-29 | Assembly type circular pile structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359450A (en) * | 2019-07-29 | 2019-10-22 | 中铁二院工程集团有限责任公司 | Assembled circle pilework and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359450A (en) * | 2019-07-29 | 2019-10-22 | 中铁二院工程集团有限责任公司 | Assembled circle pilework and construction method |
| CN110359450B (en) * | 2019-07-29 | 2024-03-08 | 中铁二院工程集团有限责任公司 | Assembled round pile structure and construction method |
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