CN111648352A - Nested connection tubular pile structure - Google Patents
Nested connection tubular pile structure Download PDFInfo
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- CN111648352A CN111648352A CN202010579495.3A CN202010579495A CN111648352A CN 111648352 A CN111648352 A CN 111648352A CN 202010579495 A CN202010579495 A CN 202010579495A CN 111648352 A CN111648352 A CN 111648352A
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- 230000002787 reinforcement Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 12
- 238000010008 shearing Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 210000001503 joint Anatomy 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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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
-
- 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
- E02D5/58—Prestressed concrete piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of building engineering and discloses a nested connecting tubular pile structure. According to the invention, the length range of the pile body is set into a plurality of sections of tubular piles with larger upper section diameter and smaller lower section diameter according with the rule that the axial force of the pile body is reduced from large to small, so that the waste that the section size of the tubular pile with the same diameter is not matched with the borne load is avoided; the next section of tubular pile is connected with the previous section of tubular pile in a nested manner through the clamping groove, so that the centering pile splicing is facilitated, the coaxial force transmission performance of the pile body is ensured, and the problem that the butt joint part of the tubular pile with the same diameter is weak in shearing resistance and bending resistance is effectively solved; in the pile sinking process, the bearing capacity of the foundation pile is improved by gradually compacting the soil around the pile by gradually enlarging the pile diameter section by section, so that the pile arrangement quantity is reduced and the construction cost is saved.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a nested connecting tubular pile structure.
Background
At present, the domestic prestressed pipe piles are generally equal in section or equal in diameter, welding or pin joint is adopted, one is not favorable for the integrity of the pipe pile, the other is poor in centering pile splicing performance or high in construction requirement, and the other is not in accordance with the load transmission rule (large at the top and small at the bottom) for friction type and end bearing friction type piles or equal-diameter piles, so that unnecessary waste is formed; the side friction resistance of the upper soil layer is reduced in the pile sinking process of the four equal-diameter piles, and the bearing capacity of the foundation pile is reduced or potential safety hazards are formed.
Disclosure of Invention
Based on the problems, the invention provides a nested connecting tubular pile structure, which saves the consumption of the consumed materials of a pile body by arranging the pile body into a plurality of sections of tubular piles with larger upper parts and smaller lower parts according to the load transmission rule of large upper parts and small lower parts; the next section of pipe pile is clamped with the previous section of pipe pile through a clamping groove with the length not less than 1.2 times of the outer diameter of the previous section of pipe pile, so that the centering pile splicing is facilitated, and the integrity and the shearing and bending performance of the pile body are ensured; in the pile sinking process, the pile diameter is gradually increased to further compact the soil between piles and increase the bearing capacity of the foundation pile; the problems of low shearing resistance and bending resistance of the butt joint part of the equal-diameter pile and unmatched pile diameter and borne load are effectively avoided.
In order to solve the technical problems, the invention provides a nested connecting tubular pile structure, which comprises a pile body and a pile tip, wherein the pile body comprises a plurality of sections of tubular piles which are sequentially and coaxially connected, the lower end of the first section of tubular pile is coaxially and fixedly connected with the pile tip, the outer diameter of each section of tubular pile is larger than that of the next section of tubular pile, and the inner diameter of each section of tubular pile is smaller than that of the next section of tubular pile; the lower extreme of every section of tubular pile except that first section tubular pile sets up the joint groove, and the diameter in joint groove equals the external diameter of its next section of tubular pile, and the length in joint groove more than or equal to 1.2 times of this section of tubular pile external diameter, next section of tubular pile through the coaxial nested connection in the joint inslot of last section of tubular pile lower part in joint groove of joint groove, form nested connection tubular pile structure.
Furthermore, a reinforcement cage is arranged in each section of tubular pile, and each reinforcement cage comprises a longitudinal reinforcement and a stirrup; two ends of each section of tubular pile are provided with stirrup encryption areas with the length twice the pile diameter of the section of tubular pile; the stirrup spacing in the stirrup encryption area is 2/3 of the stirrup spacing in the middle part of the tubular pile.
Further, the diameter of joint groove subtracts 50mm for this section of tubular pile vertical reinforcement ring cloth diameter, and is not more than this section of pipe dress internal diameter and 2/3 wall thickness.
Furthermore, the joint inslot wall of every section tubular pile is provided with a plurality of vertical stupexes along joint groove length direction, and the joint is provided with vertical stupefied assorted recess on the tubular pile end in the joint inslot, and 6 of interval along circumference equipartition are no less than to protruding stupefied and recess quantity.
Furthermore, the end part of the tubular pile clamped in the clamping groove is fixedly provided with an annular end plate made of steel, and the section shape of the annular end plate is the same as the upper section shape of the tubular pile.
Further, the edge of the end part of the tubular pile, which is provided with the clamping groove, is of a wedge-shaped structure.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the pile body is set into a plurality of sections of tubular piles with larger upper diameter and smaller lower diameter according to the load transmission rule of large upper part and small lower part, so that the consumption of the consumed materials of the pile body is saved; the next section of pipe pile is clamped with the previous section of pipe pile through a clamping groove with the length not less than 1.2 times of the outer diameter of the previous section of pipe pile, so that the centering pile splicing is facilitated, and the integrity and the shearing and bending performance of the pile body are ensured; in the pile sinking process, the pile diameter is gradually increased to further compact the soil between piles and increase the bearing capacity of the foundation pile; the problems of low shearing resistance and bending resistance of the butt joint part of the equal-diameter pile and unmatched pile diameter and borne load are effectively avoided.
Drawings
Fig. 1 is a schematic structural diagram of a nested connecting pipe pile structure in the embodiment;
FIG. 2 is a schematic cross-sectional view of the end of a tubular pile with a snap-in groove in the embodiment;
fig. 3 is a schematic perspective view of the tube pile with the wedge-shaped structure in the embodiment;
FIG. 4 is an enlarged schematic view of detail A of FIG. 1;
wherein: 1. pile tip; 2. a tubular pile; 3. a clamping groove; 4. longitudinal ribs; 5. hooping; 6. vertical convex ridges; 7. a groove; 8. an annular end plate; 9. a wedge-shaped structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example (b):
referring to fig. 1 and 2, a nested tubular pile 2 structure comprises a pile body and a pile tip 1, wherein the pile body comprises a plurality of sections of tubular piles 2 which are coaxially connected in sequence, the lower end of the first section of tubular pile 2 is coaxially and fixedly connected with the pile tip 1, the outer diameter of each section of tubular pile 2 is larger than that of the next section of tubular pile 2, and the inner diameter of each section of tubular pile 2 is smaller than that of the next section of tubular pile 2; the lower extreme of every section of tubular pile 2 except first section tubular pile 2 sets up joint groove 3, and the diameter in joint groove 3 equals the external diameter of its next section of tubular pile 2, and the length more than or equal to 1.2 times of this section of tubular pile 2 external diameter of joint groove 3, next section of tubular pile 2 through 3 coaxial nested couplings in the joint groove 3 of the 2 lower parts of last section of tubular pile, form nested connection tubular pile 2 structure.
In this embodiment, the pile tip 1 is used for squeezing the foundation soil body in situ during pile sinking, so as to reduce pile sinking resistance and facilitate pile sinking. The top end of the uppermost section of tubular pile 2 is used as a pile cap to bear the direct hammering force of a heavy hammer in the pile sinking process every time in the pile sinking process, and the pile body is protected. After pile sinking is finished, the pile body and the surrounding soil body generate friction force to support the upper foundation or the bearing platform, and the friction pile is used; the pile tip 1 sinks to the inner bearing layer of the foundation to support the upper foundation or bearing platform and is an end bearing pile. Because the load distribution rule of the foundation or the bearing platform on the upper part borne by the pile body is gradually reduced from top to bottom, the pile body is set to be the tubular pile 2 with the larger upper part diameter and connected with the tubular pile 2 with the smaller lower part diameter through the clamping groove 3, when the pile body is stressed, the contact area of the upper tubular pile 2 and the peripheral soil body is large, the bearing capacity is higher, the contact area of the lower tubular pile 2 and the peripheral soil body is small due to the small diameter, and the bearing capacity is smaller than that of the upper large-diameter tubular pile 2, so that the load transmission rule of the upper part and the; on the premise of meeting the bearing capacity of a foundation or a bearing platform, the diameter of the lower part of the pile body is reduced, the consumption of consumed materials of the pile body is saved, and unnecessary waste is avoided.
If the equal-diameter pile is directly adopted, when the pile is sunk, the pile body extrudes the periphery, a gap exists between the upper part of the equal-diameter pile and the peripheral soil body after the pile is sunk, the contact effect of the upper part pile body and the peripheral soil body is poor, and good friction resistance is not generated between the upper part pile body and the peripheral soil body, so that the problem that the shearing resistance of the butt joint part of the equal-diameter pile is lower and the side friction resistance of the upper soil layer is reduced in the pile sinking process is solved by adopting the pile body structure of the sleeve pile connecting pipe pile 2.
When the pile end of the next section of tubular pile 2 is close to the ground, the upper section of tubular pile 2 is connected with the section of tubular pile 2 in a clamping mode through the clamping groove 3, the diameter of the clamping groove 3 of the upper section of tubular pile 2 is equal to the outer diameter of the next section of tubular pile 2, the centering pile splicing during construction is facilitated, and meanwhile the integrity of the pile body is guaranteed. When the pile is hammered and sunk, the pile body can squeeze the surrounding soil body, so that the frictional resistance between the pile body and the surrounding soil body is further increased, and the bearing capacity of the single pile is improved.
When sinking the pile, firstly, hammering the first section of tubular pile 2 into the foundation, reserving the length suitable for pile extension of the next section of tubular pile 2, then sleeving the next section of tubular pile 2 on the pile top of the first section of tubular pile 2, hammering the tubular pile 2 on the upper part to sink the pile, then sequentially carrying out butt joint and pile sinking of each section of tubular pile 2, and finishing pile sinking when the designed elevation of the pile end is reached or the pile end reaches the bearing layer. The verticality of the pile body should be monitored at any time in the pile sinking process, and if deviation exists, the deviation should be corrected in time.
In this embodiment, the diameter of joint groove 3 subtracts 50mm for this section of tubular pile 2 vertical reinforcement ring cloth diameter, and is not more than this section of pipe dress internal diameter and 2/3 wall thickness. The strength of the joint of the upper and lower pipe sections is ensured, and the problem of fracture of the joint is prevented.
Referring to fig. 1-4, a reinforcement cage is arranged in each section of tubular pile 2, and the reinforcement cage comprises longitudinal ribs 4 and stirrups 5; two ends of each section of tubular pile 2 are provided with hooping 5 encryption areas with the length being twice of the pile diameter (2D in figure 1) of the section of tubular pile 2; the distance between the stirrups 5 in the reinforcement area of the stirrups 5 is 2/3 of the distance between the stirrups 5 in the middle part of the tubular pile 2. The shear resistance of the pile body can be increased and the horizontal bearing capacity of the pile body can also be improved by the reinforcement cage formed by binding the longitudinal ribs 45 and the stirrups 5. The end head of the pile end of each section of tubular pile 2 is provided with a hooping reinforcement 5 encryption area which can be used as a pile sheathing cap in the hammering pile sinking process, so that the bearing capacity of the pile end is improved, and the pile end is not easy to damage; 2 end department stirrup 5 of last section tubular pile that is located joint groove 3 is intensive than 2 mid portion's of tubular pile 5, plays the effect of restraint to 2 ends of tubular pile that are located joint groove 3, can reduce the shrinkage factor or the expansion ratio of 2 tip of tubular pile that are located joint groove 3. The front end of the previous section of tubular pile 2 is also provided with a stirrup 5 encryption area, so that the clamping part is prevented from generating large radial stress on the clamping groove 3 at the front end of the previous section of tubular pile 2 to cause the cracking of the clamping groove 3 due to the expansion of the end head of the next section of tubular pile 2;
the 3 inner walls in joint groove of every section tubular pile 2 are provided with a plurality of vertical stupefied 6 along joint groove 3 length direction is last, and the joint is provided with vertical stupefied 6 assorted recess 7 on the tubular pile 2 end in joint groove 3, and 6 of interval along circumference equipartition are no less than to protruding stupefied and recess 7 quantity. The recess 7 of 2 ends of tubular pile and the vertical protruding stupefied 6 of joint inslot 3 cooperate and peg graft, can increase the area of contact between joint groove 3 and the next section tubular pile 2, and the contact performance of the next section tubular pile 2 and the last section tubular pile 2 in joint inslot 3 is strengthened, increases the connection effect of junction.
The end part of the tubular pile 2 clamped in the clamping groove 3 is fixed with an annular end plate 8 made of steel, and the section shape of the annular end plate 8 is the same as the upper section shape of the tubular pile 2. In the pile sinking process of the tubular pile 2, the annular end plate 8 directly bears the hammering force of the heavy hammer, so that the impact resistance of the tubular pile 2 is improved, and the tubular pile 2 can be protected.
Referring to fig. 1 and 3, the end edge of the tubular pile 2 provided with the clamping groove 3 is a wedge-shaped structure 9. The edge is wedge structure 9 in the pile sinking process can reduce the resistance effect of the foundation soil body to tubular pile 2, and is convenient for pile sinking.
The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only for the purpose of clearly illustrating the verification process of the invention and are not intended to limit the scope of the invention, which is defined by the claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides a nested connection tubular pile structure, includes pile body and stake point (1), its characterized in that: the pile body comprises a plurality of sections of tubular piles (2) which are coaxially connected in sequence, the lower end of the first section of tubular pile (2) is coaxially and fixedly connected with the pile tip (1), the outer diameter of each section of tubular pile (2) is larger than that of the next section of tubular pile (2), and the inner diameter of each section of tubular pile (2) is smaller than that of the next section of tubular pile (2); the lower extreme of every section of tubular pile (2) except first section tubular pile (2) sets up joint groove (3), the diameter in joint groove (3) equals the external diameter of its next section of tubular pile (2), the length more than or equal to 1.2 times of this section of tubular pile (2) external diameter of joint groove (3), next section of tubular pile (2) through joint groove (3) coaxial nestification in last section of tubular pile (2) lower part joint groove (3), form nested connection tubular pile (2) structure.
2. The nested connecting tube pile structure according to claim 1, wherein: a reinforcement cage is arranged in each section of the tubular pile (2), and each reinforcement cage comprises a longitudinal rib (4) and a stirrup (5); two ends of each section of the tubular pile (2) are provided with hooping reinforcement (5) encryption areas with the length being twice of the pile diameter of the section of the tubular pile (2); the distance between the stirrups (5) in the stirrup (5) encryption area is 2/3 of the distance between the stirrups (5) in the middle part of the tubular pile (2).
3. The nested connecting tube pile structure according to claim 1, wherein: the diameter of joint groove (3) is this section of tubular pile (2) vertical arrangement of reinforcement ring cloth diameter and subtracts 50mm, and is not more than this section of pipe dress internal diameter and 2/3 wall thickness.
4. The nested connecting tube pile structure according to claim 1, wherein: every festival tubular pile (2) joint groove (3) inner wall is provided with a plurality of vertical protruding stupefied (6) along joint groove (3) length direction is last, and the joint is provided with vertical protruding stupefied (6) assorted recess (7) on tubular pile (2) end in joint groove (3), protruding stupefied with recess (7) quantity is no less than 6 of interval along circumference partition.
5. The nested connecting tube pile structure according to claim 4, wherein: the end part of the tubular pile (2) which is connected in the connecting groove (3) is fixed with an annular end plate (8) made of steel, and the section shape of the annular end plate (8) is the same as the upper section shape of the tubular pile (2).
6. The nested connecting tube pile structure according to claim 1, wherein: the end edge of the tubular pile (2) provided with the clamping groove (3) is of a wedge-shaped structure (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010579495.3A CN111648352A (en) | 2020-06-23 | 2020-06-23 | Nested connection tubular pile structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010579495.3A CN111648352A (en) | 2020-06-23 | 2020-06-23 | Nested connection tubular pile structure |
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| Publication Number | Publication Date |
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| CN111648352A true CN111648352A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010579495.3A Pending CN111648352A (en) | 2020-06-23 | 2020-06-23 | Nested connection tubular pile structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892711A (en) * | 2022-05-23 | 2022-08-12 | 广州市设计院集团有限公司 | Construction method of retaining wall in deep and soft soil layer and slope supporting structure |
-
2020
- 2020-06-23 CN CN202010579495.3A patent/CN111648352A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892711A (en) * | 2022-05-23 | 2022-08-12 | 广州市设计院集团有限公司 | Construction method of retaining wall in deep and soft soil layer and slope supporting structure |
| CN114892711B (en) * | 2022-05-23 | 2024-07-16 | 广州市设计院集团有限公司 | Construction method of retaining wall in deep and weak soil stratum and side slope supporting structure |
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