CN222809994U - A pressure type prefabricated pile structure - Google Patents
A pressure type prefabricated pile structure Download PDFInfo
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- CN222809994U CN222809994U CN202421940217.6U CN202421940217U CN222809994U CN 222809994 U CN222809994 U CN 222809994U CN 202421940217 U CN202421940217 U CN 202421940217U CN 222809994 U CN222809994 U CN 222809994U
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Abstract
本实用新型公开一种压力型预制桩结构，应用于抗浮领域中的抗拔桩工程，包含桩体结构、端板、预应力筋杆体、锁定装置、桩尖；桩体结构为钢筋混凝土材料制备而成的筒体结构，桩体结构中心为纵向通长的内腔；端板为金属钢板，设置在桩体结构的两端；预应力筋锁定装置位于桩体结构的两端，能够将预应力筋杆体进行固定，并将预应力筋杆体所受到的预张拉力锁定在端板上；所述桩尖为金属板卷制而成的圆锥形结构，焊接在桩体结构底部；通过上述构件的相互配合，形成内部设置有预应力筋杆体且将预应力筋杆体所受的预应力锁定在桩体结构两端的压力型预制桩结构，解决常规预制管桩单桩承载力低容易产生裂缝以及耐久性差、不耐承压水的问题。
The utility model discloses a pressure-type prefabricated pile structure, which is applied to the anti-pullout pile engineering in the field of anti-floating, and comprises a pile body structure, an end plate, a prestressed tendon rod body, a locking device, and a pile tip; the pile body structure is a cylindrical structure made of reinforced concrete material, and the center of the pile body structure is a longitudinally long inner cavity; the end plate is a metal steel plate, which is arranged at both ends of the pile body structure; the prestressed tendon locking device is located at both ends of the pile body structure, and can fix the prestressed tendon rod body and lock the prestressing force exerted on the prestressed tendon rod body on the end plate; the pile tip is a conical structure formed by rolling a metal plate, which is welded to the bottom of the pile body structure; through the mutual cooperation of the above-mentioned components, a pressure-type prefabricated pile structure with a prestressed tendon rod body arranged inside and the prestress exerted on the prestressed tendon rod body is locked at both ends of the pile body structure, so as to solve the problems of low bearing capacity, easy cracking, poor durability and inability to withstand pressurized water of conventional prefabricated pipe piles.
Description
Technical Field
The utility model relates to a precast pile structure, in particular to a pressure precast pile structure which is applied to a uplift pile engineering in the field of anti-floating.
Background
In order to fully utilize land resources, on one hand, overground main buildings are developed to high floors, on the other hand, the development and the utilization of underground spaces are also increasing, and underground projects such as high-rise building basements, pure underground garages, underground shops, sinking squares, underground storage, underground traffic and the like are increasing, so that the utilization of the underground spaces basically faces the anti-floating problem, and certain anti-floating measures are needed. The current domestic anti-floating measures are numerous and can be generally divided into active anti-floating (such as drainage decompression, curtain water isolation and the like) and passive anti-floating (such as a ballast weight method, an anti-floating pile, an anti-floating anchor rod, a structural counterweight and the like). Among the numerous anti-floating technologies, the anti-floating pile is widely applied due to the advantages of good stratum adaptability, high anti-floating bearing capacity and the like, and has wide application market. The pulling-resistant pile is divided into a cast-in-place concrete pulling-resistant pile and a prefabricated pulling-resistant pile according to pile body materials of the pulling-resistant pile and a pressure pulling-resistant pile according to a acceptance mechanism. The prefabricated uplift pile is applied to more and more projects because the construction quality is reliable, and the prefabricated uplift pile accords with the national building energy conservation and green development direction. However, the conventional prefabricated anti-pulling pile is in a tension type, namely, the anti-pulling pile is tensioned at the pile top, and in a subsequent working state, pile body concrete is in a 'pulling-shrinking' state, so that the bearing capacity is limited and cracks are easy to generate. In the working stage of the pressure type uplift pile, the pile body force transmission component applies pressure to the pile body, so that the pile body concrete is continuously in a compressive stress working state under the working state, a pile body crack is in a controllable state, deep soil can be mobilized, and the uplift bearing capacity of the single pile is improved.
In addition, the high-bearing water stratum is in underground bearing water surge caused by the fact that the hollow inner cavity of the pipe pile is not tightly connected with other components, and the like, so that a construction working surface is seriously influenced.
In view of the limited structural forms of the existing precast piles, precast piles which have good durability and are suitable for high-pressure-bearing water cannot be formed, a pressure type precast pile structure is provided to solve the problems.
Disclosure of utility model
The utility model aims to provide a pressure type precast pile structure, which solves the problems that a single pile of a conventional precast pile is low in bearing capacity, easy to crack, poor in durability and not resistant to bearing water.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A pressure type precast pile structure is characterized by comprising a pile body structure, end plates, a prestress rib body, a locking device and a pile tip, wherein the pile body structure is a cylindrical structure made of reinforced concrete materials, the center of the pile body structure is a longitudinal through long inner cavity, the end plates are made of metal steel plates and are arranged at two ends of the pile body structure, the two end plates are arranged concentrically, the plane outline of the end plates is similar to the cross section outline of the pile body structure, one or more through holes are formed in the center of the end plates and are matched with the specifications and the number of the prestress rib body, the prestress rib body is composed of single or multiple high-strength thread steel or high-strength steel strands and is arranged in the inner cavity of the pile body structure, the two ends of the prestress rib body are respectively connected with the end plates according to design requirements, the prestress rib locking device is arranged at the two ends of the pile body structure and can fix the prestress rib body and lock the prestress rib body on the end plates, the pile tip is a conical structure formed by rolling the metal plates and is welded at the bottom of the pile body structure, the space of the pile tip and the pile body and the prestress rib body are mutually exposed out of the prestress rib body structure through the locking device.
The top end of the prestressed tendon body extends out of the upper end plate, the extension length is determined according to the design requirement and is smaller than the thickness of the raft body of the main body structure, and when the length of the prestressed tendon body extending out of the upper end plate is insufficient, the extension treatment is carried out by using a connector.
When the prestressed tendon locking device is the high-strength nut, the extruding anchor or the clamping piece type anchor, the high-strength nut is provided with an expansion flange, the height of the expansion flange is not smaller than the wall thickness of the high-strength nut, the width of the expansion flange is smaller than the center distance of adjacent prestressed tendon bodies, and the arrangement of the expansion flange can reduce the local pressure of the high-strength nut to the end plate.
Further, an anchor plate and a spiral rib are arranged on the prestressed rib rod body extending out of the upper end plate, the anchor plate and the spiral rib are integrally embedded into the raft plate of the main body structure, and a flexible water stop ring is arranged on the prestressed rib rod body extending out of the upper end plate.
Further, the upper end plate and the upper end face of the pile body structure are concentrically arranged, the diameter of the upper end plate is smaller than the outer contour of the upper end face of the pile body structure by not smaller than 4cm, an annular space is formed in an area outside the contact position of the upper end plate and the upper end face of the pile body structure, the annular space can be in contact with the lower end face of the pile driver, a contact surface is provided for pile pressing of the pile driver, and the upper end plate can limit lateral displacement of the pile driver and provide guidance for the pile driver.
The pile body structure is characterized in that the pile body structure is formed by rolling steel plates, the pile body structure is provided with a temporary pile cap, the temporary pile cap is a hollow cylinder body structure formed by rolling steel plates, the height of the temporary pile cap is larger than the length of a prestressed reinforcement rod body extending out of an upper end plate, the inner diameter of the temporary pile cap is larger than the outer contour surrounded by an upper end plate locking device, the outer diameter of the temporary pile cap is smaller than the outer contour of the upper end surface of the pile body structure and smaller than the inner diameter of a pile driver, the temporary pile cap is welded and fixed with the upper end plate or the pile body structure, the exposed prestressed reinforcement rod body and the locking device of the upper end plate can be completely surrounded by the temporary pile cap for isolation protection, the temporary pile cap can provide vertical guide for the pile driver and limit lateral displacement of the pile driver in the pile driver construction stage, and the temporary pile cap can isolate the prestressed reinforcement rod body from contacting with external cement and concrete in the earth excavation stage in the pile top region.
Furthermore, foaming isolation materials are filled in the temporary pile caps, and/or isolation jackets are placed on the outer sides of the prestressed reinforcement rods in the temporary pile caps, so that the pile caps can be conveniently removed and pile heads can be conveniently cleaned.
Further, all the prestressed reinforcement bodies or the prestressed reinforcement bodies except the partial length of the bottom end in the inner cavity of the pile body structure are coated with lubricant, and an isolating sleeve is arranged outside the lubricant.
Further, the upper end plate and the lower end plate are provided with slurry inlet holes and exhaust holes, grouting pipes are bound on the prestressed reinforcement rod body, the upper ends of the grouting pipes extend out of the upper end plate, the lower ends of the grouting pipes extend into the space surrounded by the pile tip, cementing materials are filled into the pile tip and the pile body structure inner cavity through the grouting pipes, or the slurry inlet holes and the exhaust holes are formed in the upper end plate and the pile tip side surface, the cementing materials in the pile body structure inner cavity and the pile tip are respectively filled through the two slurry inlet holes, or the slurry inlet holes and the exhaust holes are formed in the upper end plate only, and the cementing materials in the pile body structure inner cavity are filled through the slurry inlet of the upper end plate.
Furthermore, a flexible water stop ring is arranged at the contact position of the lower end plate and the end face of the pile body structure, so that the waterproof tightness of the lower end plate is improved, epoxy resin glue is smeared at the contact position of the lower end plate and the locking device and the contact position of the locking device and the prestress rib body for waterproof sealing, meanwhile, loosening of the locking device caused by vibration can be avoided, and prestress loss caused by vibration is reduced.
Furthermore, the pressure type precast pile structure can be used independently, can also be used with mixing piles and filling piles in a combined mode to form a composite pile body structure, and when the pressure type precast pile structure is the composite pile body structure, limiting blocks are arranged on the outer side of the pile body structure to control concentricity of the precast piles, the peripheral mixing piles and the filling piles.
Compared with the prior art, the pressure type precast pile structure has the advantages that the pressure type precast pile structure comprises a pile body structure, end plates, a prestressed reinforcement rod body, a locking device and a pile tip, wherein the pile body structure is a cylindrical structure made of reinforced concrete materials, the center of the pile body structure is a longitudinal through long inner cavity, the end plates are made of metal steel plates and are arranged at two ends of the pile body structure, the two end plates are arranged concentrically, the outer contour of the plane of the end plates is similar to the outer contour of the cross section of the pile body structure, one or more through holes are formed in the center of the end plates and are matched with the specifications and the number of the prestressed reinforcement rod body, the prestressed reinforcement rod body is composed of single or multiple high-strength threaded steel or high-strength steel strands, pretension force is applied in the inner cavity of the pile body structure according to design requirements, the two ends of the prestressed reinforcement rod body are respectively connected with the end plates, the prestressed reinforcement locking device is arranged at the two ends of the pile body structure, the prestressed reinforcement rod body can be fixed, the prestressed reinforcement rod body is locked on the end plates, the pile tip is a conical structure formed by rolling the metal plates, one or more through the through holes are formed in the center of the pile body structure, the pile tip is easily sealed, the pile body is sealed, the problem of the pile body is easily exposed, and the inner side of the prestressed reinforcement structure is easily stressed by the pile body is sealed, and the prestressed reinforcement structure is easily stressed by the sealing the pile body is formed by the sealing structure, and the sealing the pile body is easily stressed and the sealing the pile body is exposed, and the inside the pile structure.
Drawings
FIG. 1 is a front view of a structure of a pressure type precast pile according to an embodiment of the present utility model;
FIG. 2 is a detailed view of connection between the pile top and the raft of the pressure precast pile structure according to an embodiment of the present utility model;
FIG. 3 is a detailed view of a pile top and a pile bottom (a lower end plate is provided with a slurry inlet and a gas outlet) of a pressure precast pile structure according to an embodiment of the utility model;
FIG. 4 is a detailed view of the pile top and pile bottom (the lower end plate has no grout inlet and exhaust holes) of a pressure precast pile structure according to an embodiment of the present utility model;
FIG. 5 is a detailed view of a pile top of a pressure type precast pile structure (provided with a temporary pile cap) according to an embodiment of the present utility model;
FIG. 6 is a top view of an upper end plate (without temporary pile caps) of a pressure type precast pile structure according to an embodiment of the present utility model;
Fig. 7 is a top view of an upper end plate (with temporary pile caps) of a pressure type precast pile structure according to an embodiment of the present utility model.
Reference numerals:
1, pile body structure and 1-1, inner cavity.
2-1 Parts of end plates, 2-2 parts of upper end plates, 2-2 parts of lower end plates, 2-3 parts of through holes, 2-4 parts of annular spaces, 2-5 parts of water stop rings, 2-6 parts of slurry inlet holes and 2-7 parts of exhaust holes.
3, A prestressed tendon body, 3-1, an isolation sleeve and 3-2, a grouting pipe.
4 Parts of locking device, 4-1 parts of high-strength nut and 4-2 parts of expansion flange.
And 5, pile tip.
And 6, anchoring the plate.
7, Spiral ribs.
8, Raft board.
And 9, temporary pile caps.
10, Foaming isolation material.
Detailed Description
The utility model will be further illustrated with reference to the following specific examples, without limiting the utility model to these specific embodiments. It will be appreciated by those skilled in the art that the utility model encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.
As shown in figures 1-7, the pressure type precast pile structure is characterized by comprising a pile body structure (1), end plates (2), a prestressed reinforcement body (3), a locking device (4) and a pile tip (5), wherein the pile body structure (1) is a cylindrical structure prepared from reinforced concrete materials, the center of the pile body structure (1) is a cavity (1-1) with longitudinal through length, the end plates (2) are metal steel plates and are arranged at two ends of the pile body structure (1), the end plates (2) are concentrically arranged, the plane outline of the end plates (2) is similar to the cross section outline of the pile body structure (1), one or more through holes (2-3) are formed in the center of the end plates (2), the through holes (2-3) are matched with the specifications and the number of the prestressed reinforcement body (3), the prestressed reinforcement body (3) is composed of single or multiple high-strength steel strands and is arranged in the cavity (1-1) of the pile body structure (1), the two ends of the prestressed reinforcement (3) are respectively connected with the end plates (2) according to design requirements, the two ends of the prestressed reinforcement body (3) can be fixed by the locking device (4), the pre-tensioning force applied to the prestressed reinforcement rod body (3) is locked on the end plate (2), the pile tip (5) is of a conical structure formed by rolling metal plates and welded at the bottom of the pile body structure (1), the space surrounded by the pile tip (5) can cover the bottom of the pile body structure (1) and the exposed locking device (4) and the exposed prestressed reinforcement rod body (3), and the prestressed reinforcement rod body (3) is arranged inside and locked at the pressure type precast pile structures at the two ends of the pile body structure (1) through the mutual matching of the components.
As an alternative embodiment, the end plate (2) is divided into an upper end plate (2-1) and a lower end plate (2-2), the upper end plate (2-1) is arranged at the top of the pile body structure (1), the lower end plate (2-2) is arranged at the bottom of the pile body structure (1), the top end of the prestressed tendon body (3) extends out of the upper end plate (2-1), the extending length is determined according to design requirements and is smaller than the thickness of the raft of the main body structure, and when the length of the prestressed tendon body (3) extending out of the upper end plate (2-1) is insufficient, a connector is used for carrying out extension treatment.
As an alternative embodiment, the prestressed tendon locking device (4) is a high-strength nut (4-1), an extrusion anchor or a clamping piece type anchor, when the prestressed tendon locking device is the high-strength nut (4-1), the high-strength nut (4-1) is provided with an expansion flange (4-2), the height of the expansion flange (4-2) is not smaller than the wall thickness of the high-strength nut (4-1), the width of the expansion flange (4-2) is smaller than the center distance of adjacent prestressed tendon bodies (3), and the arrangement of the expansion flange (4-2) can reduce the local pressure of the high-strength nut (4-1) on the end plate (2).
As an alternative embodiment, an anchor plate (6) and a spiral rib (7) are arranged on the prestressed rib body (3) extending out of the upper end plate (2-1), the anchor plate (6) and the spiral rib (7) are integrally embedded into the raft (8) with the main structure, and when the waterproof requirement is high, a flexible water stop ring (2-5) is arranged on the prestressed rib body extending out of the upper end plate (2-1).
As an alternative embodiment, the upper end plate (2-1) is arranged concentrically with the upper end face of the pile body structure (1), the diameter of the upper end plate (2-1) is smaller than the outer contour of the upper end face of the pile body structure (1) by not smaller than 4cm, an annular space (2-4) is formed in the area outside the contact position of the upper end plate (2-1) and the upper end face of the pile body structure (1), the annular space (2-4) can be in contact with the lower end face of the pile driver to provide a contact surface for pile pressing of the pile driver, and the upper end plate (2-1) can limit lateral displacement of the pile driver and provide guidance for the pile driver.
As an alternative embodiment, the top end of the pile body structure (1) is provided with a temporary pile cap (9), the temporary pile cap structure (9) is an auxiliary component in the construction process of pile pressing and pile driving, the pile cap is removed before being connected with a raft, spiral hoops, anchor plates and the like are placed on the pile cap after the removal, the temporary pile cap (9) is a hollow cylindrical structure formed by rolling steel plates, the height of the temporary pile cap (9) is larger than the length of a prestressed reinforcement rod body (3) extending out of an upper end plate (2-1), the inner diameter of the temporary pile cap is larger than the outline surrounded by a locking device (4) of the upper end plate (2-1), the outer diameter of the temporary pile cap is smaller than the outline of the upper end surface of the pile body structure (1) and smaller than the inner diameter of a pile driving device, the temporary pile cap (9) and the upper end plate (2-1) or the top end of the pile body structure (1) are temporarily welded and fixed, the temporary pile cap (9) can fully enclose the exposed prestressed reinforcement rod body (3) and a locking device (4) of the upper end plate (2-1) to perform isolation protection, and the temporary pile cap (9) can be guided to the pile driving side in the vertical direction and can be displaced in the vertical direction in the pile driving stage.
As an alternative embodiment, the interior of the temporary pile cap (9) is filled with foaming isolation materials (10) and/or an isolation sheath is placed on the outer side of the prestressed reinforcement body (3) in the temporary pile cap (9), so that the pile cap is conveniently removed and the pile head is conveniently cleaned.
As an alternative embodiment, all the prestressed reinforcement bodies (3) or the prestressed reinforcement bodies (3) except for the partial length of the bottom end, which are positioned in the inner cavity (1-1) of the pile body structure (1), are coated with a lubricant, and an isolating sleeve (3-1) is arranged outside the lubricant.
As an alternative embodiment, as shown in figure 3, a grouting hole (2-6) and an exhaust hole (2-7) are arranged on an upper end plate (2-1) and a lower end plate (2-2), a grouting pipe (3-2) is bound on a prestressed reinforcement rod body (3), the upper end of the grouting pipe (3-2) extends out of the upper end plate (2-1), the lower end extends into a space surrounded by a pile tip (5), a cementing material is filled into the pile tip (5) and an inner cavity (1-1) of a pile body structure (1) through the grouting pipe (3-2), in the grouting process, the space in the pile tip (5) is filled firstly, the exhaust hole (2-7) is filled back from the lower end plate (2-2), the inner cavity (1-1) is filled up along with the continuous grouting of the grouting pipe (3-2), the exhaust hole (2-7) is filled back from the upper end plate (2-1), or as shown in figure 4, the grouting hole (2-6) and the exhaust hole (2-7) are arranged on the side surface of the upper end plate (2-1) and the pile tip (5), the lower end plate (2-2) isolates the inner cavity (1-1) of the pile body structure (1) from the pile tip (5), cementing material pouring in the inner cavity (1-1) of the pile body structure (1) and the pile tip (5) is respectively carried out through the upper end plate and the pile tip slurry inlet, or only the upper end plate (2-1) is provided with a slurry inlet (2-6) and an exhaust hole (2-7), cementing material pouring in the inner cavity (1-1) of the pile body structure (1) is carried out through the upper end plate (2-1) slurry inlet, no cementing material is filled in the pile tip (5), and anticorrosive materials can be smeared on the inner end plate (2), the locking device (4) and the prestressed reinforcement rod body (3) of the pile tip (5) to carry out anticorrosive treatment, wherein the cementing materials are cement slurry or cement mortar.
As an alternative embodiment, a flexible water stop ring (2-5) is arranged at the contact position of the lower end plate (2-2) and the end face of the pile body structure (1), so that the waterproof tightness of the lower end plate (2-2) is improved. And epoxy resin glue is smeared at the contact position of the lower end plate (2-2) and the locking device (4) and the contact position of the locking device (4) and the prestressed tendon body (3), so that waterproof sealing is performed. When prestressing tendons body (3) are finish rolling deformed steel bar, the rib angle of deformed steel bar is great, interval between adjacent ribs is also great, vibration in the middle of the transportation probably causes the relaxation that the nut was fastened, cause the loss of prestressing force, use epoxy to paint the back, can fix locking device (4) and reinforcing bar between, can avoid the not hard up of locking device (4) that the vibration caused, reduce prestressing force and receive vibration and produce prestressing force loss, when needs long distance transportation, can expose the winding of iron wire first in the position of locking device (4) outside the deformed steel bar, then carry out epoxy's the application.
As an alternative embodiment, the pressure type precast pile structure can be used alone or in combination with a stirring pile and a filling pile to form a composite pile body structure (1), and when the pressure type precast pile structure is the composite pile body structure (1), a limiting block is arranged on the outer side of the pile body structure (1) to control concentricity of the precast pile, the peripheral stirring pile and the filling pile.
Claims (10)
1. A pressure type precast pile structure is characterized by comprising a pile body structure, end plates, a prestress rib body, a locking device and a pile tip, wherein the pile body structure is a cylindrical structure made of reinforced concrete materials, the center of the pile body structure is a longitudinal through long inner cavity, the end plates are made of metal steel plates and are arranged at two ends of the pile body structure, the two end plates are arranged concentrically, the plane outline of the end plates is similar to the cross section outline of the pile body structure, one or more through holes are formed in the center of the end plates and are matched with the specifications and the number of the prestress rib body, the prestress rib body is composed of single or multiple high-strength thread steel or high-strength steel strands and is arranged in the inner cavity of the pile body structure, the two ends of the prestress rib body are respectively connected with the end plates according to design requirements, the prestress rib locking device is arranged at the two ends of the pile body structure and can fix the prestress rib body and lock the prestress rib body on the end plates, the pile tip is a conical structure formed by rolling the metal plates and is welded at the bottom of the pile body structure, the space of the pile tip and the pile body and the prestress rib body are mutually exposed out of the prestress rib body structure through the locking device.
2. The pressure type precast pile structure as defined in claim 1, wherein the end plates are divided into an upper end plate and a lower end plate, the upper end plate is positioned at the top of the pile body structure, the lower end plate is positioned at the bottom of the pile body structure, the top end of the prestressed tendon body extends out of the upper end plate, the extending length is determined according to design requirements and is smaller than the thickness of the raft of the main body structure, and when the length of the prestressed tendon body extending out of the upper end plate is insufficient, the connector is used for carrying out extension treatment.
3. The structure of claim 1, wherein the tendon locking device is a high-strength nut, an extrusion anchor or a clip type anchor, and when the tendon locking device is a high-strength nut, the high-strength nut is provided with an expansion flange, the height of the expansion flange is not less than the wall thickness of the high-strength nut, the width of the expansion flange is less than the center distance between adjacent tendon bodies, and the arrangement of the expansion flange can reduce the local pressure of the high-strength nut to the end plate.
4. A pressure type precast pile structure as defined in claim 2, wherein the prestressed tendon body extending from the upper end plate is provided with an anchor plate and a spiral tendon, and the prestressed tendon body extending from the upper end plate and the anchor plate and the spiral tendon are integrally embedded into the raft of the main body structure.
5. A pressure type precast pile structure as defined in claim 2, wherein the upper end plate is arranged concentrically with the upper end face of the pile body structure, the diameter of the upper end plate is not smaller than 4cm than the outer contour of the upper end face of the pile body structure, an annular space is formed in a region except for the contact position of the upper end plate and the upper end face of the pile body structure, the annular space can be contacted with the lower end face of the pile driver to provide a contact surface for pile pressing of the pile driver, and the upper end plate can limit lateral displacement of the pile driver and provide guidance for the pile driver.
6. The pressure type precast pile structure according to claim 2, wherein a temporary pile cap is arranged at the top end of the pile body structure and is a hollow cylinder structure formed by rolling steel plates, the height of the temporary pile cap is larger than the length of the prestressed reinforcement rod body extending out of an upper end plate, the inner diameter of the temporary pile cap is larger than the outer contour surrounded by an upper end plate locking device, the outer diameter of the temporary pile cap is smaller than the outer contour of the upper end face of the pile body structure and smaller than the inner diameter of a pile driver, the temporary pile cap and the top end of the upper end plate or the pile body structure are temporarily welded and fixed, the temporary pile cap can fully enclose the exposed prestressed reinforcement rod body and the locking device of the upper end plate for isolation protection, the temporary pile cap can provide vertical guide for the pile driver and limit lateral displacement of the pile driver in a pile driver construction stage, the temporary pile cap can isolate contact between the prestressed reinforcement rod body and external cement soil and concrete in a pile top area earth excavation stage, and/or an isolation sheath is placed outside the prestressed reinforcement rod body in the temporary pile cap so as to facilitate pile cap cleaning and pile head removal.
7. The pressure precast pile structure as claimed in claim 2, wherein the upper end plate and the lower end plate are provided with a grout inlet and a grout outlet, grouting pipes are bound on the prestressed reinforcement body, the upper ends of the grouting pipes extend out of the upper end plate, the lower ends of the grouting pipes extend into the space around the pile tip, cementing materials are poured into the pile tip and the pile body structure inner cavity through the grouting pipes, or grout inlet and grout outlet are respectively arranged on the upper end plate and the pile tip side face, cementing materials in the pile body structure inner cavity and the pile tip are poured through two grout inlets, or grout inlet and grout outlet are only arranged on the upper end plate, cementing materials in the pile body structure inner cavity are poured through the upper end plate grout inlet, and the cementing materials are cement grout.
8. A pressure type precast pile structure as defined in claim 7, wherein all the tendons bodies or tendons bodies except for a partial length of the bottom end in the pile body structure are coated with a lubricant, and an isolation sleeve is arranged outside the lubricant.
9. The pressure type precast pile structure as defined in claim 2, wherein a flexible water stop ring is arranged at the contact position of the lower end plate and the pile body structure end face, so that the waterproof tightness of the lower end plate is improved, epoxy resin glue is smeared at the contact position of the lower end plate and the locking device and the contact position of the locking device and the prestress rib body to carry out waterproof sealing, meanwhile, loosening of the locking device caused by vibration can be avoided, and prestress loss caused by vibration of prestress is reduced.
10. A pressure type precast pile structure as defined in any one of claims 1 to 9, wherein the pressure type precast pile structure can be used alone or in combination with a mixing pile and a filling pile to form a composite pile body structure, and when the pile body structure is a composite pile body structure, a limiting block is arranged on the outer side of the pile body structure to control concentricity of the precast pile, the peripheral mixing pile and the filling pile.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202421940217.6U CN222809994U (en) | 2024-08-12 | 2024-08-12 | A pressure type prefabricated pile structure |
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| CN202421940217.6U CN222809994U (en) | 2024-08-12 | 2024-08-12 | A pressure type prefabricated pile structure |
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| CN202421940217.6U Active CN222809994U (en) | 2024-08-12 | 2024-08-12 | A pressure type prefabricated pile structure |
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2024
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