CN210482280U - Assembled rectangular pile structure - Google Patents

Abstract

The utility model discloses an assembled rectangular pile structure, which comprises an underground section positioned in a rectangular 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 rectangular cross 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. At present, no rectangular hole digging machine exists, and rectangular holes can not be dug mechanically, the utility model can reduce the requirement of pile hole digging precision due to the filling layer arranged between the rectangular pile hole and the underground section, and can adopt a small-sized circular hole digging machine to dig holes, thus solving the problems of high safety risk and low efficiency of manual hole digging; and an assembly structure is adopted, so that the problems that cast-in-place concrete needs to be poured by a vertical template and is difficult to maintain are solved, the construction quality is ensured, and the construction progress is accelerated.

Description

Assembled rectangular pile structure

Technical Field

The utility model relates to an assembly type structure technical field, in particular to assembled rectangle pile structure.

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 exist among the prior art, provide an assembled rectangle stake structure.

In order to achieve the purpose of the invention, the utility model provides the following technical scheme:

an assembled rectangular pile structure comprises an underground section positioned in a rectangular 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 spliced with each other, and each prefabricated standard unit is of a rectangular 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.

Assembled rectangle pile structure, 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, do not have the rectangular hole to dig hole machinery now, unable mechanical excavation rectangular hole, the utility model discloses owing to set up the filling layer between rectangular pile hole and underground, can reduce the requirement of stake hole excavation precision, can adopt small-size circular port to dig hole machinery and dig the hole, even it is not too smooth-going all around after the pore-forming, do not influence structural performance yet, solved the manual work and 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, and the upper ground section is formed by assembling a plurality of prefabricated standard units.

The utility model discloses a section forms pile plate structure with the cooperation of fender soil board on the ground, can effectively resist soil pressure and keep roadbed stable in structure.

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, the inner side of the pile hole is also provided with a protective wall for preventing the couch hole.

Preferably, the retaining wall is a prefabricated reinforced concrete structural member, counter bores are formed section by utilizing the self weight of the retaining wall, one section of retaining wall is excavated mechanically, one section of retaining wall is constructed, and the integral retaining wall is formed section by section.

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.

Compared with the prior art, the beneficial effects of the utility model are that:

assembled rectangle pile structure, can be at the prefabricated standard cell of factory's prefabricated production, assemble at the scene and can the shaping, adopt the assembled structure, solved cast in situ concrete under the extremely cold condition and need found the template and pour and the problem of maintenance difficulty, solve the problem that the poured concrete quality is difficult to the assurance under water, and guaranteed construction quality, can accelerate the construction progress.

On the other hand, do not have the rectangular hole to dig hole machinery now, unable mechanical excavation rectangular hole, the utility model discloses owing to set up the filling layer between rectangular pile hole and underground, can reduce the requirement of stake hole excavation precision, can adopt small-size circular port to dig hole machinery and dig the hole, even it is not too smooth-going all around after the pore-forming, do not influence structural performance yet, solved the manual work and 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 shear strength requirement is met by arranging the shear key; the waste slag is adopted as a filling material for recycling, so that the method is more environment-friendly.

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 sectional view of an assembled rectangular pile structure according to embodiment 1 of the present invention.

Fig. 3 is an elevation view of an assembled rectangular pile structure according to embodiment 1 of the present invention.

Fig. 4 is a schematic view of mechanical excavation of a rectangular pile hole according to embodiment 1 of the present invention.

Fig. 5 is a cross-sectional view of the upper section according to embodiment 2 of the present invention.

Fig. 6 is an elevation view of an assembled rectangular pile structure according to embodiment 2 of the present invention.

Fig. 7 is a cross-sectional view of a prefabricated standard cell according to embodiment 3 of the present invention.

Fig. 8 is an elevation view of a prefabricated standard cell according to embodiment 3 of the present invention.

Fig. 9 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, 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 rectangular pile structure includes an underground section 1 located in a rectangular pile hole 0, a filling layer 2 is disposed between the underground section 1 and the rectangular 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 rectangular 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 rectangular 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 encrypted near the area where landslide may occur, i.e., the soil retaining side against the soil pressure, a plurality of rows of prestressing tendons 14 are radially arranged along the rectangular pile, and the sectional size of the prestressing tendons 14 is increased.

The construction of the fabricated rectangular pile structure comprises the following steps:

the method comprises the following steps: as shown in fig. 4, a rectangular pile hole 0 is dug by a small-sized circular hole digging machine, a reinforced concrete retaining wall 3 is arranged in the rectangular pile hole 0, counter bores are dug section by utilizing the self weight of the retaining wall 3, a section of retaining wall is dug mechanically for construction, and an integral retaining wall is formed section by section. Due to the adoption of a prefabricated structure, the precision requirement on the rectangular pile hole 0 can be lowered, the pile hole is not necessarily in a standard rectangle, and the structure performance is not influenced by the perimeter with a point deviation;

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: filling filler in the 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. 5 to 6, the present embodiment is different from embodiment 1 in that the matched rectangular 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 the upper ground section 9 can be used for installing a soil guard plate 12.

The construction of the fabricated rectangular pile structure comprises the following steps:

the method comprises the following steps: adopting a small-sized circular hole digging machine to dig a rectangular pile hole 0, arranging a reinforced concrete retaining wall 3 in the rectangular pile hole 0, digging a retaining wall section by using the dead weight of the retaining wall 3, constructing a retaining wall section by section, and forming an integral retaining wall section by section;

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. 7-8, 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;

female head end 111 is equipped with the first grout sleeve 4 of a plurality of, public head end 112 is equipped with the second grout sleeve 8 of the same quantity, every first grout sleeve 4 corresponds one of intercommunication preformed groove 5, every it runs through the correspondence to indulge muscle 7 second grout sleeve 8, just the cross sectional dimension of second grout sleeve 8 with the cross sectional dimension looks adaptation of first grout sleeve 4, second grout sleeve 8 can insert in the first grout sleeve 4.

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. 7, three 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. 7, all the first grouting sleeves 4 of the female end 111 are connected to form an integral steel structure, which 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. 9, 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 (9)

1. An assembled rectangular pile structure is characterized by comprising an underground section positioned in a rectangular 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 rectangular 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 rectangular assembled pile structure of claim 1, further comprising an above-ground section above said pile hole, said above-ground section being connected to said underground section, said above-ground section being assembled from a plurality of said prefabricated standard units.

3. The rectangular pile structure of claim 1, wherein the pile hole is further provided with a retaining wall on the inside.

4. The fabricated rectangular pile structure of claim 3, wherein the retaining wall is a prefabricated reinforced concrete structural member.

5. An assembled rectangular pile structure as claimed in any one of claims 1 to 4, wherein each prefabricated standard unit comprises a body, a preformed groove and a longitudinal bar are arranged in the body, the longitudinal bar extends out of the body, extends into the preformed groove of an adjacent prefabricated standard unit and is connected through grouting.

6. The rectangular pile structure of claim 5, wherein the body has 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.

7. The fabricated rectangular pile structure of claim 6, wherein the first grout sleeve and the second grout sleeve are both integral grout sleeves.

8. The fabricated rectangular pile structure according to claim 6, wherein one end of the double-layered reinforcing steel structure is connected to the longitudinal bar by a reinforcing steel bar coupler; 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.

9. An assembled rectangular pile structure according to claim 5, wherein each of said prefabricated standard units has a larger number of said longitudinal bars, prestressed bars arranged on a soil retaining side than on a non-soil retaining side, and at least two rows of said longitudinal bars are arranged in a radial direction on the soil retaining side.

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