CN112281816A - Multi-section spliced tubular pile and embedding method thereof - Google Patents
Multi-section spliced tubular pile and embedding method thereof Download PDFInfo
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- CN112281816A CN112281816A CN202011185742.8A CN202011185742A CN112281816A CN 112281816 A CN112281816 A CN 112281816A CN 202011185742 A CN202011185742 A CN 202011185742A CN 112281816 A CN112281816 A CN 112281816A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 29
- 238000001125 extrusion Methods 0.000 claims abstract description 20
- 230000003068 static effect Effects 0.000 claims description 22
- 239000011440 grout Substances 0.000 claims description 21
- 238000007569 slipcasting Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 15
- 239000002689 soil Substances 0.000 claims description 5
- 210000003205 muscle Anatomy 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 210000000078 claw Anatomy 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000004567 concrete Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
- E02D5/526—Connection means between pile segments
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Abstract
The invention discloses a multi-section spliced tubular pile and an embedding method thereof, and belongs to the technical field of building structures. The invention discloses a multi-section spliced tubular pile which comprises an upper section tubular pile, a lower section tubular pile and at least one section of middle section tubular pile positioned between the upper section tubular pile and the lower section tubular pile, wherein all the sections of tubular piles are connected through joints; a closed grouting chamber enclosed by an upper end plate, a lower end plate and a force transmission steel pipe is arranged in the joint, a first grouting hole used for being communicated with the grouting pipe is formed in the upper end plate, and a plurality of extrusion holes for extruding slurry in the grouting chamber are formed in the force transmission steel pipe; at least one sleeve is connected between the upper end plate and the lower end plate and is used for providing a passage allowing a grouting pipe to pass through the joint, so that grouting can be performed at each joint of the multi-section spliced tubular pile and an expanded head is formed, the tubular pile is provided with a plurality of expanded heads at different heights, and the bearing performance and the anti-pulling performance of the pile body are improved.
Description
Technical Field
The invention relates to the technical field of building structures, in particular to a multi-section spliced tubular pile and a burying method thereof.
Background
Precast pipe piles refer to pipe piles made at or near a construction site, generally of a concrete structure, or a steel structure, or a wooden structure. The construction field of Chinese buildings adopts more precast piles, mainly including concrete precast tubular piles and steel pipe piles. The concrete precast pile can bear larger load, is firm and durable, has high construction speed, is one of pile types widely applied, has larger influence on the surrounding environment in the construction process, and is commonly used as a concrete solid square pile and a prestressed concrete hollow tubular pile. The steel pile mainly comprises a steel pipe pile and an H-shaped steel pile.
In the related field, pile sinking methods mainly include a hammering method, a static pile pressing method, a vibration method and the like, and after the precast tubular pile is sunk to a preset bearing layer, grouting is usually performed to form an enlarged head between the precast tube and the bearing layer, so that the single-pile bearing capacity and the pulling-resistant bearing capacity of the precast tubular pile are enhanced. For example, chinese patent application No. 2011103821069 discloses a slip casting type micro steel pipe pile, which includes a steel pipe, a plurality of spaced slurry outlet groups are axially disposed on a side wall of the steel pipe, and a rubber sealing ring is sleeved outside each slurry outlet group. Each slurry outlet hole group consists of a plurality of slurry outlet holes which are uniformly distributed on the same horizontal plane.
In addition, when the pre-buried pipe pile needs a long length, the common method is to splice two or more sections of precast pipe piles for use. For example, chinese patent application No. 2016101038166 discloses a prefabricated tubular pile concave-convex joint, wherein two symmetrical concave parts are arranged on the pipe wall of the prefabricated upper tubular pile pipe orifice, two symmetrical convex parts are arranged on the pipe wall of the prefabricated lower tubular pile pipe orifice, and the two concave parts are matched with the two convex parts; sealing plates are arranged in the upper prefabricated pipe pile and the lower prefabricated pipe pile, and extrusion holes are formed in the pipe wall between the sealing plates and the pipe orifice; the joint of the pipe openings of the prefabricated upper pipe pile and the prefabricated lower pipe pile is provided with the corresponding threaded hole and the corresponding screw rod, so that high-strength concrete mortar pulp slurry can be injected between the columns from the grouting port after the upper pipe pile and the lower pipe pile are in threaded connection, and the strength of the connecting joint of the upper pipe pile and the lower pipe pile is improved.
However, for the spliced precast tubular pile, in order to improve the strength of the connection node, structures such as the seal plates arranged at the joints of the spliced precast tubular pile hinder grouting at the bottom end of the precast tubular pile; because the whole length of the prefabricated pipe pile of concatenation formula is longer, and the required pressure-bearing strength of the joint department is very high, therefore can not directly set up on the tubular pile lateral wall of joint department top and extrude the hole to directly to the hollow structure of tubular pile in-filling thick liquids in order to further improve the pressure-bearing burden of joint.
In addition, if the prefabricated pipe pile of concatenation formula is for the multisection concatenation pipe pile that contains three section and above tubular pile, usually have more than two tie points, and the degree of difficulty to being located the tie point department of different heights and carrying out the slip casting is great.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defect that grouting can not be performed at connecting points with different heights in the prior art, and provides a multi-section spliced tubular pile.
The invention also aims to provide an embedding method, aiming at improving the embedding efficiency of the multi-section spliced pipe pile.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention discloses a multi-section spliced tubular pile which comprises an upper section tubular pile, a lower section tubular pile and at least one section of middle section tubular pile positioned between the upper section tubular pile and the lower section tubular pile, wherein all the sections of tubular piles are connected through joints; the joint is internally provided with a closed grouting chamber surrounded by an upper end plate, a lower end plate and a force transmission steel pipe, the upper end plate is provided with a first grouting hole for communicating with a grouting pipe, and the force transmission steel pipe is provided with a plurality of extrusion holes for extruding slurry in the grouting chamber; at least one sleeve is connected between the upper end plate and the lower end plate for providing a passage for allowing a grout pipe to pass through the joint.
Furthermore, the sleeve is located in the grouting chamber, a channel upper opening is formed in the joint of the sleeve and the upper end plate, and a channel lower opening is formed in the joint of the sleeve and the lower end plate.
Further, the relative positions of the first grouting hole and the plurality of passage upper ports on the upper end plate are arranged as follows: when the joint rotates around the axis of the force transmission steel pipe so that the first grouting hole reaches the position before the rotation of the upper opening of one channel, one upper opening of the channel always reaches the position before the rotation of the first grouting hole.
Further, the grouting pipe is in threaded connection with the first grouting hole.
Furthermore, a connecting piece is arranged at the bottom end of the grouting pipe, a clamping groove is formed in the connecting piece, and a clamping jaw in clamping fit with the clamping groove is arranged on the hole wall of the first grouting hole; or,
the connecting piece is provided with a clamping ring with a notch, the connecting piece is located, a clamping groove is formed in the upper portion of the clamping ring, and a clamping jaw matched with the notch is arranged on the hole wall of the first grouting hole.
Furthermore, a sealing ring is arranged at the bottom end of the grouting pipe, at least two convex ribs are arranged on the wall of the first grouting hole, and the sealing ring can be clamped between the two convex ribs; or,
the bottom of slip casting pipe is provided with two at least sealing washers, be provided with protruding muscle on the pore wall in first slip casting hole, protruding muscle can block into two between the sealing washer.
The invention discloses a method for burying the multi-section spliced tubular pile, which comprises the following steps,
pile sinking stage: sinking the lower section of pipe pile into the natural ground, and then completing pile extension of the rest sections of pipe piles in sequence; after the upper section of tubular pile, the lower section of tubular pile and at least one section of middle section of tubular pile are connected through a plurality of joints to form a precast tubular pile, sinking the precast tubular pile to a designed elevation by adopting a static pressure or hammering method;
grouting stage: injecting slurry into the grouting chamber of each joint through a grouting pipe, and then extruding the slurry out of the extrusion holes on the joints and into the surrounding soil;
pile forming stage: and the slurry extruded from the grouting chamber is diffused to the periphery and is solidified to form an expanded head.
Further, the middle section pipe pile is set as a section, the pile sinking stage comprises the following steps,
step 1.1, sinking the lower section pipe pile into the natural ground by static pressure or hammering, and stopping sinking the pile when the length of the upper end surface of the lower section pipe pile leaking out of the natural ground is less than 2 m; then connecting the first joint with the lower pipe pile, and connecting the first grouting pipe with an upper end plate of the first joint;
step 1.2, hoisting a middle section of pipe pile to a position corresponding to a first joint, and then sleeving the middle section of pipe pile on a first grouting pipe and aligning the middle section of pipe pile with a lower section of pipe pile; connecting the first joint with the middle-section tubular pile;
step 1.3, continuously adopting static pressure or hammering to sink the middle-section tubular pile into the natural ground, and stopping pile sinking when the length of the upper end surface of the middle-section tubular pile leaking out of the natural ground is less than 2 m; then sleeving a second joint on the first grouting pipe and connecting the second joint with the middle-section pipe pile, and then connecting the second grouting pipe with an upper end plate of the second joint;
step 1.4, hoisting the upper section of tubular pile to a position corresponding to the second joint, and then sleeving the upper section of tubular pile on the first grouting pipe and the second grouting pipe and aligning the upper section of tubular pile with the middle section of tubular pile; connecting the second joint with the upper section of the tubular pile;
and 1.5, continuously adopting static pressure or hammering to sink the upper section of tubular pile into the natural ground until the lower end surface of the lower section of tubular pile reaches the designed elevation.
Further, the middle section pipe pile is set as a section, the pile sinking stage comprises the following steps,
step 1.1, sinking the lower section pipe pile into the natural ground by static pressure or hammering, and stopping sinking the pile when the length of the upper end surface of the lower section pipe pile leaking out of the natural ground is less than 2 m; then connecting the first joint with the lower section pipe pile;
step 1.2, hoisting the middle-section tubular pile to a position corresponding to the first joint, and then connecting the first joint with the middle-section tubular pile;
step 1.3, continuously adopting static pressure or hammering to sink the middle-section tubular pile into the natural ground, and stopping pile sinking when the length of the upper end surface of the middle-section tubular pile leaking out of the natural ground is less than 2 m; then connecting the second joint with the middle-section tubular pile;
step 1.4, hoisting the upper section of tubular pile to a position corresponding to the second joint, and then connecting the second joint with the upper section of tubular pile;
step 1.5, continuously adopting static pressure or hammering to sink the upper section of tubular pile into the natural ground until the lower end surface of the lower section of tubular pile reaches the designed elevation;
and 1.6, penetrating the first grouting pipe from the sleeve on the second joint through the second joint and connecting the first grouting pipe with the first grouting pipe of the first joint, and connecting the second grouting pipe with the first grouting pipe of the second joint.
Further, in the grouting stage, grouting is performed synchronously in the grouting chamber of the first joint through the first grouting pipe and grouting is performed synchronously in the grouting chamber of the second joint through the second grouting pipe.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) the invention discloses a multi-section spliced tubular pile which comprises an upper section tubular pile, a lower section tubular pile and at least one section of middle section tubular pile positioned between the upper section tubular pile and the lower section tubular pile, wherein all the sections of tubular piles are connected through joints; a closed grouting chamber enclosed by an upper end plate, a lower end plate and a force transmission steel pipe is arranged in the joint, a first grouting hole used for being communicated with the grouting pipe is formed in the upper end plate, and a plurality of extrusion holes for extruding slurry in the grouting chamber are formed in the force transmission steel pipe; at least one sleeve is connected between the upper end plate and the lower end plate and is used for providing a passage allowing a grouting pipe to pass through the joint, so that grouting can be performed at each joint of the multi-section spliced tubular pile and an expanded head is formed, the tubular pile is provided with a plurality of expanded heads at different heights, and the bearing performance and the anti-pulling performance of the pile body are improved.
(2) According to the invention, the connecting piece is arranged at the bottom end of the grouting pipe, and the connecting piece is connected with the first grouting pipe in a buckling fit, interference fit, expansion joint fit and other modes, so that the grouting pipe can be inserted from the upper end surface of the upper section of pipe pile and connected with the joint after the pile splicing of each section of pipe pile is completed, the pipe pile does not need to be additionally lifted to be sleeved on the grouting pipe, the construction difficulty is reduced, and the embedding efficiency of the spliced pipe piles of multiple sections is improved.
(3) The embedding method is simple, grouting can be simultaneously carried out in the joint grouting chambers of all the pipe piles after pile sinking, and the efficiency is high; in addition, after the pile is formed, at least two expansion heads are formed at different heights of the pile body, so that the bearing performance and the uplift resistance of the pile body can be greatly improved.
Drawings
Fig. 1 is a schematic structural view of a multi-section spliced tubular pile of the present invention;
FIG. 2 is a schematic structural view of a joint according to the present invention;
FIG. 3 is a schematic view of the structure of the upper opening of the channel in the present invention;
FIG. 4 is a schematic view of a process for burying a multi-section spliced tubular pile according to the present invention;
FIG. 5 is a schematic view of the position relationship between the upper opening of the passage and the first grouting hole in the present invention;
FIG. 6 is a schematic view of the connection between the connection plate and the joint according to the present invention;
FIG. 7 is a schematic view of the structure of the connector of the present invention;
FIG. 8 is a schematic view of a radially disposed latch of the present invention;
FIG. 9 is a schematic view of the fitting relationship between the snap ring and the buckle according to the present invention;
fig. 10 is a schematic view of the fitting relationship between the seal ring and the rib according to the present invention.
The reference numerals in the schematic drawings illustrate: 100. an upper section of tubular pile; 110. a connecting plate; 111. a third connection hole; 200. middle section pipe piles; 300. a joint; 310. an upper end plate; 311. a first connection hole; 320. a lower end plate; 321. a second connection hole; 330. a force transmission steel pipe; 331. an extrusion orifice; 332. a first grouting hole; 333. reinforcing ribs; 334. a claw; 335. a rib is protruded; 336. a projection; 340. a sleeve; 341. an upper opening of the channel; 342. a lower opening of the channel; 350. a connecting pipe; 400. a grouting pipe; 410. a connecting member; 411. a card slot; 412. clamping into the inclined plane; 413. a snap ring; 414. a notch; 420. a seal ring; 500. and (5) lower section pipe piles.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
In some application scenarios, the length requirement of the prefabricated pipe pile may reach more than 15m, and the length of a single-section pipe pile is generally about 10m, so that the two single-section pipe piles are spliced to be used in a common way. However, when the length of the pipe pile is long, the requirements on the pressure-bearing performance and the connection strength of the joint are high, and the connection methods such as welding, flange screwing, sulfur plaster riveting and the like between the single-section pipe pile and the single-section pipe pile are difficult to ensure that the whole pipe pile has high stability and simultaneously has high pulling resistance and pressure-bearing performance.
In order to solve the above problems, this embodiment provides a multi-section spliced tubular pile, which is formed by splicing more than three single-section tubular piles, that is, the multi-section spliced tubular pile includes an upper-section tubular pile 100, a lower-section tubular pile 500 and a plurality of middle-section tubular piles 200.
Fig. 1 shows a multi-section spliced tubular pile structure of the embodiment. Wherein, for the convenience of the connection between each section of tubular pile, a joint 300 can be arranged between the upper section of tubular pile 100 and the middle section of tubular pile 200, between the middle section of tubular pile 200 and the middle section of tubular pile 200, and between the middle section of tubular pile 200 and the lower section of tubular pile 500, and the position of the joint 300 can be used as a grouting point of the prefabricated tubular pile.
It should be noted that the pipe piles referred to in this embodiment include an upper-section pipe pile 100, a lower-section pipe pile 500, and a middle-section pipe pile 200; each section of pipe pile comprises an upper section of pipe pile 100 and a middle section of pipe pile 200, a middle section of pipe pile 200 and a middle section of pipe pile 200, and a middle section of pipe pile 200 and a lower section of pipe pile 500.
Specifically, after the multiple sections of spliced pipe piles of the embodiment are driven into the designed elevation, grouting may be performed into the joint 300, and then the grout is extruded from the extrusion holes 331 on the joint 300, and finally solidified into an expanded head at the periphery of the joint of each section of pipe pile.
In the embodiment, the joint 300 is grouted, and the grout is extruded from the extrusion holes 331 to form the expanded head, so that the connection strength between the pile body and the soil body can be improved, and the integral bearing performance and the anti-pulling performance of the pipe pile are improved; in addition, the joints are filled with the slurry, and the joints are wrapped with a layer of slurry, namely, the expanded heads, so that the prefabricated tubular pile of the embodiment is actually formed into a reinforced concrete structure at the joints, and the connection stability between the sections of tubular piles can be improved.
In the following, the following description is given,
fig. 2 shows the structure of a joint 300 as a first embodiment. Specifically, the fitting 300 includes an upper end plate 310, a lower end plate 320, and a force transfer steel tube 330. The upper end plate 310 may be connected to the upper tubular pile 100, or may be connected to the middle tubular pile 200, specifically, may be connected by bolts; the lower end plate 320 may be connected to the lower tubular pile 500, or may be connected to the middle tubular pile 200, specifically, may be connected by bolts. In addition, in order to improve the connection strength between the joint 300 and the pipe pile, after the joint 300 is bolted to the pipe pile, all-welding or spot welding may be additionally performed.
The force transmission steel pipe 330 is arranged between the upper end plate 310 and the lower end plate 320, the upper end of the force transmission steel pipe 330 is connected with the lower side surface of the upper end plate 310, and the lower end of the force transmission steel pipe 330 is connected with the upper side surface of the lower end plate 320. The force transfer steel tube 330 is connected to the upper end plate 310 and the lower end plate 320 to form a closed grouting chamber. The force transmission steel tube 330 may be welded to the upper end plate 310 and the lower end plate 320, or the force transmission steel tube 330 may be integrally stamped with the upper end plate 310 and the lower end plate 320.
In order to connect the upper end plate 310 with the upper tubular pile 100 or the middle tubular pile 200, the edge of the upper end plate 310 may protrude from the outer sidewall of the force transmission steel pipe 330 and form a first connection portion, and then the first connection portion is provided with a plurality of first connection holes 311, and connection bolts are inserted through the first connection holes 311 and connected with the upper tubular pile 100 or the middle tubular pile 200, so as to connect the upper end plate 310 with the upper tubular pile 100 or the middle tubular pile 200.
Similarly, in order to connect the lower end plate 320 with the lower tubular pile 500 or the middle tubular pile 200, the edge of the lower end plate 320 may protrude from the outer sidewall of the force transmission steel tube 330 and form a second connection portion, and then the second connection portion is provided with a plurality of second connection holes 321.
Fig. 3 shows the structure of the upper end plate 310. Specifically, in order to realize the filling of the grouting material into the grouting chamber, the upper end plate 310 may be provided with a first grouting hole 332, and the first grouting hole 332 is used for connecting the grouting pipe 400.
The first grout hole 332 and the grout pipe 400 may be connected by means of a screw connection. Specifically, as an example, the first injection hole 332 may be provided with an internal thread, and the outer sidewall of the injection pipe may be provided with an external thread that is engaged with the internal thread of the first injection hole 332, and the internal thread may be engaged with the external thread when the first injection hole 332 is coupled to the injection pipe 400.
In addition, in order to realize grouting for joints 300 with different heights on the pile body of the multi-section spliced pipe pile, a sleeve 340 can be arranged on the joint 300, and the sleeve 340 is used for providing a passage for allowing a grouting pipe 400 to pass through the joint 300, namely, the grouting pipe 400 can pass through the joint 300 from the sleeve 340 and extend into the lower part of the joint 300.
The sleeve 340 can be positioned in the grouting chamber, and the sleeve 340 and the grouting chamber are arranged in a relatively sealed mode, so that slurry is prevented from leaking; the axis of the sleeve 340 may be parallel to the axis of the force transmitting steel tube to facilitate the passage of the grout tube 400 through the fitting 300. The joint of the sleeve 340 and the upper end plate 310 may be provided with an upper channel opening 341, the joint of the sleeve 340 and the lower end plate 320 may be provided with a lower channel opening 342, and the grouting pipe 400 specifically penetrates into the sleeve 340 from the upper channel opening 341 and penetrates out from the lower channel opening 342.
In order to facilitate the processing of the joint 300 and the production of the spliced pipe piles of multiple sections, the position relation between the position of the sleeve 340 of the joint 300 and the first grouting hole can meet a certain rule, so that the joint 300 is universal at the joint of each section of pipe pile.
Specifically, when the sleeve 340 is provided in one or more than two, the relative positions of the first grouting hole and the plurality of passage upper ports 341 on the upper end plate 310 are arranged as follows: when the adapter 300 is rotated around the axis of the force transmission steel tube 330 to bring the first inlet to a position before the rotation of one of the upper openings 341, one of the upper openings 341 is always brought to the position before the rotation of the first inlet.
For example, when the sleeve 340 is provided as one, the straight line connecting the center point of the upper side surface of the upper end plate 310 of the upper port 341 and the center point of the upper side surface of the upper end plate of the first injection hole is bisected by the center point of the upper side surface of the upper end plate, so that when the sleeve 340 is rotated 180 ° around the axis of the force transmission steel pipe 330, the positions of the upper port 341 and the first injection hole are switched. Therefore, when two joints 300 are required for connecting the pipe piles, the two joints 300 can be rotated by 180 ° so that the passage upper opening 341 of the first joint can be aligned with the first grouting hole of the second joint.
For another example, referring to fig. 5, when the number of the sleeves 340 is two or more, the maximum plane figure formed by connecting the center point of the upper side surface of the upper end plate 310 of the first grouting hole and the center points of the upper side surfaces of the upper end plates 310 of all the channel upper openings 341 is a regular n +1 polygon, and the center point of the regular n +1 polygon coincides with the center point of the upper side surface of the upper end plate 310. Where n is the number of sleeves 340.
In order to extrude the slurry from the grouting chamber, the force transmission steel pipe 330 may be provided with a plurality of extrusion holes 331. As an example of the arrangement of the extrusion holes 331, the extrusion holes 331 may be divided into a plurality of rows, and the extrusion holes 331 in different rows may be arranged along the circumference of the force transmission steel pipe 330, specifically, may be arranged equidistantly, so as to ensure that the slurry is distributed relatively uniformly around the force transmission steel pipe 330.
As a further improvement of this embodiment, the extrusion holes 331 in the same row may be arranged along the axial direction of the force transmission steel pipe 330. Meanwhile, positions between the extrusion holes 331 located in different columns may correspond to each other.
The force transmission steel pipe 330 may be provided with a plurality of reinforcing ribs 333 on the outer side wall thereof, and the reinforcing ribs 333 are used for improving the rigidity and strength of the whole connector 300. In addition, the plurality of reinforcing ribs 333 may be arranged along the circumferential direction of the outer sidewall of the force transmission steel pipe 330, specifically, may be arranged equidistantly along the circumferential direction of the outer sidewall of the force transmission steel pipe 330, so that the overall rigidity and strength distribution of the joint 300 are more uniform.
As a further optimization, the force transmission steel pipe 330 is provided with at least one extrusion hole 331 at a position between the two reinforcing ribs 333. Therefore, when the slurry is extruded from the extrusion holes 331 of the force transmission steel pipe 330, the slurry is not disturbed by the reinforcing ribs 333, so that the slurry is not uniformly distributed around the joint 300.
In this embodiment, the grout pipe 400 may be inserted into the hollow structure of the upper or middle tubular pile 100 or 200. According to the structure of the joint 300, after the joint 300 is connected to the lower tubular pile 500 or the middle tubular pile 200, the grouting pipe 400 can be connected to the upper end plate 310 of the joint 300, and finally the upper tubular pile 100 is sleeved on the grouting pipe 400 to complete the connection.
Specifically, fig. 4 shows a burying method of a multi-section spliced pipe pile. The burying method specifically comprises a pile sinking stage, a grouting stage and a pile forming stage. Wherein,
the pile sinking stage is that the lower section pipe piles 500 are sunk into the natural ground, and then pile splicing of the remaining sections of pipe piles is completed in sequence; after the upper section of pipe pile 100, the lower section of pipe pile 500 and at least one section of middle section of pipe pile 200 are connected through a plurality of joints 300 to form a precast pipe pile, the precast pipe pile is sunk to a designed elevation by adopting a static pressure or hammering method.
When the middle section pipe pile 200 is set as a section, the pile sinking stage specifically comprises the following steps:
the method specifically comprises the following steps:
step 1.1, sinking the lower section pipe pile into the natural ground by static pressure or hammering according to the state a, and stopping sinking the pile when the length of the upper end surface of the lower section pipe pile leaking out of the natural ground is less than 2 m; referring to the b-state and the c-state, the first joint is then connected with the lower joint pipe pile, and the first grout pipe is connected with the upper end plate of the first joint.
Step 1.2, according to the state d, hoisting the middle-section tubular pile to a position corresponding to the first joint, and then sleeving the middle-section tubular pile on the first grouting pipe and aligning the middle-section tubular pile with the lower-section tubular pile; connecting the first joint with the middle-section tubular pile;
step 1.3, according to the state e, continuing to sink the middle-section tubular pile into the natural ground by adopting static pressure or hammering, and stopping pile sinking when the length of the upper end surface of the middle-section tubular pile leaking out of the natural ground is less than 2 m; referring to the state f, sleeving a second joint on the first grouting pipe and connecting the second joint with the middle-section pipe pile, and then connecting the second grouting pipe with an upper end plate of the second joint;
step 1.4, according to the state of g, hoisting the upper section of tubular pile to the position corresponding to the second joint, and then sleeving the upper section of tubular pile on the first grouting pipe and the second grouting pipe and aligning the upper section of tubular pile with the middle section of tubular pile; connecting the second joint with the upper section of the tubular pile;
and 1.5, continuously adopting static pressure or hammering to sink the upper section of tubular pile into the natural ground until the lower end surface of the lower section of tubular pile reaches the designed elevation.
The grouting stage refers to the process of injecting slurry into the grouting chamber of the joint 300 through the grouting pipe 400. After the grouting chamber is continuously filled with slurry, a positive pressure environment begins to be formed in the grouting chamber, so that the slurry in the grouting chamber is extruded out of the extrusion holes 331 and is extruded into the soil body. Wherein the slurry may be a concrete slurry.
Referring to the h state, the pile forming stage is that after the slurry is extruded from the extrusion hole 331 and around the joint, the concrete is naturally solidified and forms an expanded head tightly connected with the soil outside the pile body of the prefabricated pipe pile.
When the middle-section tubular pile 200 is set to two sections and more, the burying process is substantially the same as the setting of the middle-section tubular pile 200 to one section, and the pile extension of the middle-section tubular pile 200 of more than two sections is sequentially completed only before the pile extension of the upper-section tubular pile 100, so that the related contents are not described in detail in this embodiment.
In the following, the following description is given,
as a second embodiment, referring to fig. 6, a connection plate 110 is detachably connected to an end of the upper tubular pile 100 facing the joint 300, a third connection hole 111 is opened at a position corresponding to the first connection hole 311 on the connection plate 110, and a second grouting hole is opened at a position corresponding to the first grouting hole 332.
The third connecting hole 111 may be a through hole, and an inner sidewall of the through hole may be provided with an internal thread; the bottom of the grouting pipe 400 is provided with an external thread, and the inner side wall of the second grouting hole is provided with an internal thread matched with the external thread of the grouting pipe 400.
In the following, the following description is given,
as a third example of the present embodiment, in order to facilitate the connection of the grout pipe 400 with the first grout hole 332, a connecting member 410 may be provided at the bottom end of the grout pipe 400. The connector 410 may allow for connections other than threaded connections, such as snap connections, expansion connections, interference connections, etc., between the grout tube 400 and the fitting 300.
For example, referring to fig. 7, the connector 410 may be circumferentially provided with a plurality of segments of slots 411, and the hole wall of the first grouting hole 332 is provided with a plurality of claws 334, the claw parts of the claws 334 being arranged along the axial direction of the grouting pipe 400 and corresponding to the positions of the slots 411. When the grout pipe 400 is inserted into the first grout hole 332, the jaws 334 are pressed by the bottom end of the connecting member 410 to be deformed in yield; when the bottom end of the connecting member 410 is continuously pressed down and loses contact with the jaws 334, the jaws 334 elastically recover to be deformed by themselves and are caught in the catching grooves 411 to complete the connection of the grout pipe 400 and the coupling 300.
Further, to facilitate the catching of the jaws 334, the bottom end of the connector 410 may be provided with a catching slope 412, and the catching slope 412 may be disposed toward the jaw portions of the jaws 334.
As one of the advantages, when the grouting pipe 400 and the joint 300 can be fastened together, the grouting pipe 400 is inserted from the upper end surface of the upper tubular pile 100 and the grouting pipe 400 and the joint 300 are conveniently connected, so that the upper tubular pile 100 and the joint 300 can be connected and driven into a designed elevation, and then the grouting pipe 400 and the joint 300 are connected, thereby avoiding the additional hoisting of the upper tubular pile 100 and reducing the construction difficulty.
Further, referring to fig. 8, the claw portions of the jaws 334 may be disposed in a radial direction of the grout pipe 400, and when the grout pipe 400 is inserted into the first grout hole 332, the jaws 334 are pressed by the bottom end of the connecting member 410 to be yield-deformed, specifically, yield-deformed in the radial direction of the grout pipe 400; when the bottom end of the connecting member 410 is continuously pressed down and loses contact with the jaws 334, the jaws 334 elastically recover to be deformed by themselves and are caught in the catching grooves 411 to complete the connection of the grout pipe 400 and the coupling 300.
For another example, referring to fig. 9, a clamping ring 413 may be disposed at the bottom end of the connecting member 410, and a plurality of notches 414 may be disposed on the clamping ring 413; the connecting member 410 further has a slot 411 above the snap ring 413. The first injection hole 332 may be provided with a plurality of claws 334, the number of the claws 334 may be the same as the number of the notches 414, and the positions of the claws 334 correspond to the positions of the notches 414. After the bottom end of the connecting member 410 is inserted into the first grouting hole 332, if the snap ring 413 contacts the jaws 334 and is blocked by the jaws 334, the grouting pipe 400 may be rotated such that the jaws 334 correspond to the notches 414, and then, after the grouting pipe 400 is continuously inserted such that the jaws 334 enter the clamping grooves 411, the grouting pipe 400 is rotated again such that the jaws 334 are misaligned with the notches 414, thereby completing the connection of the grouting pipe 400 and the joint 300.
Of course, in order to prevent the slurry from being extruded from the gap between the wall of the first grouting hole 332 and the grouting pipe 400 during grouting, a sealing ring 420 may be provided on the connecting member 410, and this solution is also applicable to other connection modes of the grouting pipe 400 and the joint 300 in this embodiment.
For another example, when the sealing ring 420 is disposed on the connecting member 410, a corresponding limiting portion similar to an expansion joint structure may be disposed to complete the connection between the grouting pipe 400 and the upper tubular pile 100. Specifically, referring to fig. 10, two or more sealing rings 420 may be provided on the connecting member 410, and a rib 335 may be provided on the first injection hole 332, and the rib 335 may have elasticity itself. When the grouting pipe 400 is inserted into the first grouting hole 332, the rib 335 may be located between the two sealing rings 420, and the connection between the grouting pipe 400 and the upper section tubular pile 100 is completed in a shape-fitting manner, and the first grouting hole 332 is sealed; two or more ribs 335 may be provided in the first grouting hole 332, and the grouting pipe 400 may be connected to the upper tubular pile 100 by interposing the packing 420 between the two ribs 335.
In this embodiment, when the middle-section pipe pile is only set to be one, the pile sinking stage specifically includes the following steps:
step 1.1, sinking the lower section pipe pile into the natural ground by static pressure or hammering, and stopping sinking the pile when the length of the upper end surface of the lower section pipe pile 500 leaking out of the natural ground is less than 2 m; then connecting the first joint with the lower section of tubular pile 500;
step 1.2, hoisting the middle-section tubular pile 200 to a position corresponding to a first joint, and then connecting the first joint with the middle-section tubular pile 200;
step 1.3, continuously adopting static pressure or hammering to sink the middle-section tubular pile 200 into the natural ground, and stopping pile sinking when the length of the upper end face of the middle-section tubular pile 200 leaking out of the natural ground is less than 2 m; then connecting the second joint with the middle section pipe pile 200;
step 1.4, hoisting the upper section of tubular pile 100 to a position corresponding to a second joint, and then connecting the second joint with the upper section of tubular pile 100;
step 1.5, continuously adopting static pressure or hammering to sink the upper section of tubular pile 100 into the natural ground until the lower end surface of the lower section of tubular pile 500 reaches the designed elevation;
and 1.6, penetrating the first grouting pipe from the sleeve on the second joint through the second joint and connecting the first grouting pipe with the first grouting pipe of the first joint, and connecting the second grouting pipe with the first grouting pipe of the second joint.
In this embodiment, the bottom of slip casting pipe is equipped with the connecting piece, realizes being connected through modes such as buckle fit, interference fit, expansion joint cooperation between this connecting piece and the first slip casting pipe for the slip casting pipe can insert and be connected with the articulate from the up end of upper segment tubular pile again after each section tubular pile connects the stake to accomplish, need not additionally hang the tubular pile high in order to overlap on the slip casting pipe, has reduced the construction degree of difficulty, has improved the efficiency of burying underground of multisection concatenation tubular pile.
In addition, in order to improve the efficiency that the multisection concatenation tubular pile was buried underground in this embodiment, through the indoor slip casting of the slip casting of first slip casting pipe to first joint, and through the indoor slip casting of second slip casting pipe to the slip casting of second joint go on in step.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. The utility model provides a multisection concatenation tubular pile which characterized in that: the pipe pile comprises an upper section of pipe pile, a lower section of pipe pile and at least one section of middle section of pipe pile, wherein the middle section of pipe pile is positioned between the upper section of pipe pile and the lower section of pipe pile; the joint is internally provided with a closed grouting chamber surrounded by an upper end plate, a lower end plate and a force transmission steel pipe, the upper end plate is provided with a first grouting hole for communicating with a grouting pipe, and the force transmission steel pipe is provided with a plurality of extrusion holes for extruding slurry in the grouting chamber; at least one sleeve is connected between the upper end plate and the lower end plate for providing a passage for allowing a grout pipe to pass through the joint.
2. The multi-section spliced tubular pile of claim 1, wherein: the sleeve is located in the grouting chamber, a channel upper opening is formed in the joint of the sleeve and the upper end plate, and a channel lower opening is formed in the joint of the sleeve and the lower end plate.
3. The multi-section spliced tubular pile of claim 2, wherein: the relative positions of the first grouting hole and the plurality of passage upper ports on the upper end plate are arranged as follows: when the joint rotates around the axis of the force transmission steel pipe so that the first grouting hole reaches the position before the rotation of the upper opening of one channel, one upper opening of the channel always reaches the position before the rotation of the first grouting hole.
4. The multi-section spliced tubular pile of claim 1, wherein: the grouting pipe is in threaded connection with the first grouting hole.
5. The multi-section spliced tubular pile of claim 1, wherein: the bottom end of the grouting pipe is provided with a connecting piece, the connecting piece is provided with a clamping groove, and the hole wall of the first grouting hole is provided with a clamping jaw in clamping fit with the clamping groove; or,
the connecting piece is provided with a clamping ring with a notch, the connecting piece is located, a clamping groove is formed in the upper portion of the clamping ring, and a clamping jaw matched with the notch is arranged on the hole wall of the first grouting hole.
6. The multi-section spliced tubular pile of claim 1, wherein: the bottom end of the grouting pipe is provided with a sealing ring, the wall of the first grouting hole is provided with at least two convex ribs, and the sealing ring can be clamped between the two convex ribs; or,
the bottom of slip casting pipe is provided with two at least sealing washers, be provided with protruding muscle on the pore wall in first slip casting hole, protruding muscle can block into two between the sealing washer.
7. A method for burying the multiple sections of spliced tubular piles as claimed in claim 1, which is characterized in that: comprises the following steps of (a) preparing a liquid crystal,
pile sinking stage: sinking the lower section of pipe pile into the natural ground, and then completing pile extension of the rest sections of pipe piles in sequence; after the upper section of tubular pile, the lower section of tubular pile and at least one section of middle section of tubular pile are connected through a plurality of joints to form a precast tubular pile, sinking the precast tubular pile to a designed elevation by adopting a static pressure or hammering method;
grouting stage: injecting slurry into the grouting chamber of each joint through a grouting pipe, and then extruding the slurry out of the extrusion holes on the joints and into the surrounding soil;
pile forming stage: and the slurry extruded from the grouting chamber is diffused to the periphery and is solidified to form an expanded head.
8. A burying method according to claim 7, wherein: the middle section pipe pile is set as a section, the pile sinking stage comprises the following steps,
step 1.1, sinking the lower section pipe pile into the natural ground by static pressure or hammering, and stopping sinking the pile when the length of the upper end surface of the lower section pipe pile leaking out of the natural ground is less than 2 m; then connecting the first joint with the lower pipe pile, and connecting the first grouting pipe with an upper end plate of the first joint;
step 1.2, hoisting a middle section of pipe pile to a position corresponding to a first joint, and then sleeving the middle section of pipe pile on a first grouting pipe and aligning the middle section of pipe pile with a lower section of pipe pile; connecting the first joint with the middle-section tubular pile;
step 1.3, continuously adopting static pressure or hammering to sink the middle-section tubular pile into the natural ground, and stopping pile sinking when the length of the upper end surface of the middle-section tubular pile leaking out of the natural ground is less than 2 m; then sleeving a second joint on the first grouting pipe and connecting the second joint with the middle-section pipe pile, and then connecting the second grouting pipe with an upper end plate of the second joint;
step 1.4, hoisting the upper section of tubular pile to a position corresponding to the second joint, and then sleeving the upper section of tubular pile on the first grouting pipe and the second grouting pipe and aligning the upper section of tubular pile with the middle section of tubular pile; connecting the second joint with the upper section of the tubular pile;
and 1.5, continuously adopting static pressure or hammering to sink the upper section of tubular pile into the natural ground until the lower end surface of the lower section of tubular pile reaches the designed elevation.
9. A burying method according to claim 7, wherein: the middle section pipe pile is set as a section, the pile sinking stage comprises the following steps,
step 1.1, sinking the lower section pipe pile into the natural ground by static pressure or hammering, and stopping sinking the pile when the length of the upper end surface of the lower section pipe pile leaking out of the natural ground is less than 2 m; then connecting the first joint with the lower section pipe pile;
step 1.2, hoisting the middle-section tubular pile to a position corresponding to the first joint, and then connecting the first joint with the middle-section tubular pile;
step 1.3, continuously adopting static pressure or hammering to sink the middle-section tubular pile into the natural ground, and stopping pile sinking when the length of the upper end surface of the middle-section tubular pile leaking out of the natural ground is less than 2 m; then connecting the second joint with the middle-section tubular pile;
step 1.4, hoisting the upper section of tubular pile to a position corresponding to the second joint, and then connecting the second joint with the upper section of tubular pile;
step 1.5, continuously adopting static pressure or hammering to sink the upper section of tubular pile into the natural ground until the lower end surface of the lower section of tubular pile reaches the designed elevation;
and 1.6, penetrating the first grouting pipe from the sleeve on the second joint through the second joint and connecting the first grouting pipe with the first grouting pipe of the first joint, and connecting the second grouting pipe with the first grouting pipe of the second joint.
10. A burying method according to claim 8 or 9, wherein: and in the grouting stage, grouting is performed into the grouting chamber of the first joint through the first grouting pipe, and grouting is performed into the grouting chamber of the second joint through the second grouting pipe.
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| CN202011185742.8A CN112281816A (en) | 2020-10-30 | 2020-10-30 | Multi-section spliced tubular pile and embedding method thereof |
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| CN202011185742.8A CN112281816A (en) | 2020-10-30 | 2020-10-30 | Multi-section spliced tubular pile and embedding method thereof |
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Application publication date: 20210129 |