CN108316331B - Concrete composite pile foundation - Google Patents
Concrete composite pile foundation Download PDFInfo
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- CN108316331B CN108316331B CN201810413061.9A CN201810413061A CN108316331B CN 108316331 B CN108316331 B CN 108316331B CN 201810413061 A CN201810413061 A CN 201810413061A CN 108316331 B CN108316331 B CN 108316331B
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- pile
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- pipe body
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a concrete composite pile foundation, which comprises a settlement-resistant pile implanted into a soil layer, a pile cap coaxially sleeved on the top of the settlement-resistant pile, and a bearing platform supported on the top of the pile cap; the pile cap is a concrete prefabricated tubular pile, and concrete is filled between the pile cap and the anti-settling pile for fixedly connecting; the anti-settling pile comprises a steel pipe body and an anti-settling mechanism arranged in the pipe body; the anti-settling mechanism comprises four anti-settling rods arranged in a cross shape and four lead screw nut pairs which correspond to the anti-settling rods one by one and are used for driving the anti-settling rods to extend out of the pipe body; a lead screw of each lead screw nut pair is provided with a bevel gear; the pile foundation is reasonable in structure, the pile which resists to sink and pull on soft soil cannot loosen and longitudinally slide, and the sink and pull performance and the dynamic load resistance are improved.
Description
Technical Field
The invention relates to the field of pile foundations, in particular to a concrete composite pile foundation.
Background
At present, municipal works, house foundations and the like in cities such as plains, seasides and the like use a large amount of concrete pile foundation structures, the construction difficulty is higher on soft soil by adopting a traditional method, more importantly, the traditional cylindrical pile structures are easy to loosen and longitudinally slide in the soft soil layer, the defects of serious insufficient anti-sinking force, insufficient lateral shear force, insufficient dynamic load resistance and the like are caused, and the stability and the reliability of a building foundation are directly influenced. In the subject of the research on the deformation mechanism and settlement control technology of the railway high embankment side slope, which is reported by the inventor of the application (the subject is an open subject in key laboratories of the department of education co-construction of the road and railway engineering safety guarantee provinces, and the subject is numbered as STKF201718), a pile foundation structure with strong settlement resistance is required to be adopted. In the traditional construction, in order to improve the stability of the building foundation in soft soil and increase the friction force between the pile body and the soil layer, the depth of the pile body can only be simply increased by a common method, the pile body can penetrate into the foundation soil body as deep as possible, the construction difficulty is increased, the construction period is long, the construction cost is high, and the increase of the dead weight of the pile body is unfavorable for the longitudinal stability of the pile body. The settlement is obvious in soft soil, the anti-drawing performance and the anti-dynamic load capacity are not obviously improved, and the requirements of actual construction cannot be met.
Disclosure of Invention
In view of the above, the invention aims to provide a concrete composite pile foundation for soft soil, which has a reasonable structure, can not loosen and longitudinally slide on the anti-submerged pile on the soft soil, improves the anti-submerged performance and the anti-dynamic load capacity, and has good stability and reliability of a building foundation, aiming at the defects that the existing anti-submerged pile on the soft soil is simple in structure, the anti-submerged pile is easy to loosen and longitudinally slide, and the anti-submerged performance and the anti-dynamic load capacity are insufficient, so that the stability and the reliability of the building foundation are poor.
The concrete composite pile foundation comprises an anti-settling pile implanted into a soil layer, a pile cap coaxially sleeved on the top of the anti-settling pile, and a bearing platform supported on the top of the pile cap; the pile cap is a concrete prefabricated tubular pile, and concrete is filled between the pile cap and the anti-settling pile for fixedly connecting; the anti-settling pile comprises a steel pipe body and an anti-settling mechanism arranged in the pipe body; the anti-settling mechanism comprises four anti-settling rods arranged in a cross shape and four lead screw nut pairs which correspond to the anti-settling rods one by one and are used for driving the anti-settling rods to extend out of the pipe body; a lead screw of each lead screw nut pair is provided with a bevel gear;
further, a circular groove for embedding the pile cap is formed in the bottom of the bearing platform;
further, a pile pad made of flexible foamed plastic is arranged above the pile cap, and a plain concrete cushion layer is arranged between the pile pad and the bearing platform;
further, the method comprises the following steps: the anti-settling mechanism further comprises an impact assembly; the impact assembly comprises an impact rod in sliding fit with the center hole of the anti-sinking rod, a spring for pushing the impact rod out to impact rock and soil, a permanent magnet fixed at the tail end of the impact rod, and an electromagnet arranged in the pipe body and used for attracting the permanent magnet to enable the impact rod to compress the spring;
furthermore, a spiral groove extending around the axis of the anti-sinking rod is arranged in the central hole of the anti-sinking rod, and a support rod in sliding fit with the spiral groove is arranged on the impact rod.
Furthermore, a cross-shaped chassis is arranged in the pipe body; the four screw rod nut pairs are respectively and correspondingly arranged on four side wings of the cross-shaped chassis, and the four side wings are provided with sliding chutes; a sliding block in sliding fit with the sliding groove is fixed on a nut of the screw-nut pair; the anti-sinking rod is fixed on the sliding block;
furthermore, two sides of the sliding block are integrally formed with supporting arms; the lower surface of the supporting arm is an arc surface and is crossarm-mounted on the side wing through the arc surface;
further, the electromagnet comprises a cross-shaped iron core, a first coil and a second coil which are wound on the cross-shaped iron core;
further, spring seats which correspond to the four impact rods one by one are fixed at the bottom of the cross-shaped chassis; a snap ring is fixedly sleeved outside the impact rod, and the spring is arranged between the snap ring and the spring seat;
further, the spring holder is made by macromolecular material, and it is equipped with the through-hole, in the iron core was fixed in the through-hole, the outer end of impact rod formed the drill bit structure.
The invention has the beneficial effects that: when the concrete composite pile foundation is constructed, after the pipe body is implanted into a soil layer, the driving rod with the bevel gear disc fixed at the lower end extends into the pipe body from the upper end of the pipe body, so that the bevel gear disc is simultaneously meshed with the four bevel gears, the driving rod simultaneously drives the four screw rods to rotate through the bevel gear disc, the screw rods drive the nuts to move outwards along the axial direction to drive the anti-sinking rods to extend outwards, and certainly, the side wall of the pipe body is provided with the four through holes to extend the anti-sinking rods, so that the anti-sinking capability of the pile foundation is greatly improved.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an anti-settling pile of the present invention;
FIG. 3 is a structural view of the anti-settling mechanism of the present invention;
FIG. 4 is a schematic layout of a feed screw nut pair of the present invention;
FIG. 5 is a schematic structural view of a slider according to the present invention;
fig. 6 is a schematic view of an electromagnet according to the present invention.
Detailed Description
Fig. 1 is a schematic structural view of the present invention, as shown in the figure: the concrete composite pile foundation of the embodiment comprises a settlement-resistant pile implanted into a soil layer, a pile cap 5 coaxially sleeved on the top of the settlement-resistant pile, and a bearing platform 1 supported on the top of the pile cap 5; the pile cap 5 is a concrete prefabricated tubular pile, and concrete 4 is filled between the pile cap 5 and the anti-settling pile for fixedly connecting; the anti-settling pile comprises a pipe body 7 and an anti-settling mechanism 6 arranged in the pipe body 7; the anti-settling mechanism 6 comprises four anti-settling rods 11 which are arranged in a cross shape and four lead screw nut pairs which correspond to the anti-settling rods 11 one by one and are used for driving the anti-settling rods 11 to extend out of the pipe body 7; the screw rod 20 of each screw rod nut pair is provided with a bevel gear 22; during construction, after the soil layer was implanted to body 7, stretch into body 7 with the actuating lever that a lower extreme was fixed with conical tooth dish 14 in from the upper end of body 7, make conical tooth dish 14 mesh with four bevel gears 22 simultaneously, the actuating lever passes through conical tooth dish 14 and drives four lead screws 20 simultaneously and rotates, lead screw 20 drives the nut and drives anti heavy pole 11 along the outside removal of axial and outwards stretch out, of course, should set up four via holes on the lateral wall of body 7 and make anti heavy pole 11 stretch out to improve the anti ability of subsiding of pile foundation greatly.
In this embodiment, a circular groove for inserting the pile cap 5 is formed at the bottom of the bearing platform 1; pile pad 3 made of flexible foam plastics is arranged above pile cap 5, and plain concrete cushion layer 2 is arranged between pile pad 3 and bearing platform 1.
In this embodiment, the anti-settling mechanism 6 further comprises an impact assembly; the impact assembly comprises an impact rod 10 which is in sliding fit with a central hole of the anti-sinking rod 11, a spring 15 which is used for pushing the impact rod 10 out to impact rock soil, a permanent magnet which is fixed at the tail end of the impact rod 10, and an electromagnet 17 which is arranged in the pipe body and is used for attracting the permanent magnet to enable the impact rod 10 to compress the spring 15; in the process of utilizing the screw-nut pair to promote anti-dead lever to stretch out, can energize electromagnet 17 to attract the permanent magnet to drive impact rod 10 to retract and compress spring 15 in the body, then cut off the power supply to electromagnet 17, impact rod 10 outwards pops out under the effect of spring 15 and impacts the ground, with a hole site of chisel out, be convenient for anti-heavy pole 11 stretch out outside the body, reduce the resistance of anti-heavy pole 11, through the frequency of controlling electromagnet 17 to energize, can control the frequency that impact rod 10 assaults.
In this embodiment, a spiral groove extending around the axis of the anti-sinking rod 11 is provided in the central hole of the anti-sinking rod 11, a support rod in sliding fit with the spiral groove is provided on the impact rod 10, the support rod is integrally formed on the outer wall of the impact rod 10, when the impact rod 10 slides relative to the anti-sinking rod 11 under the pushing of the spring 15, the impact rod 10 rotates around the axis at the same time, and the impact rod 10 can drill a hole site in rock soil through the rotation.
In this embodiment, a cross-shaped chassis 19 is arranged in the pipe body; the four screw rod nut pairs are respectively and correspondingly arranged on four side wings of the cross-shaped chassis 19 (each screw rod 20 is supported on the chassis 19 through two bearing seats), and the four side wings are provided with sliding chutes; a sliding block 13 which is in sliding fit with the sliding groove is fixed on a nut of the screw-nut pair; the anti-settling rod 11 is fixed on the sliding block 13, four rails 8 are arranged on the inner wall of the pipe body along the axis direction, the outer edges of four side wings of the cross-shaped chassis 19 are respectively in sliding fit with the four rails, and after the pipe body is inserted into ground rock soil, the cross-shaped chassis 19 and the anti-settling mechanism are put into the pipe body; the middle part of cross chassis 19 is fixed with guide bracket 21, is equipped with the guide cylinder on the guide bracket 21, and the internal diameter of this guide cylinder is slightly greater than the external diameter of awl fluted disc, when needs drive bevel gear 22 rotated, can insert the guide cylinder and pass the guide cylinder with actuating lever 5 together with awl fluted disc piece in, the guide cylinder can effectively lead the actuating lever, makes the awl fluted disc can be smooth with four bevel gear engagements.
In this embodiment, the two sides of the sliding block 13 are integrally formed with supporting arms 27; the lower surface of the supporting arm 27 is an arc surface, and the supporting arm is arranged on the side wing through the arc surface, the arc surface and the upper surface of the side wing form sliding contact, the contact is linear contact, and the friction resistance is small; the upper body of the slide block 13 is fixedly embedded with a nut, and the lower body 28 of the slide block is provided with a mounting hole 8 for an interference fit anti-sinking rod.
In this embodiment, the electromagnet 17 includes a cross-shaped iron core 25 and a first coil 23 and a second coil 24 wound on the cross-shaped iron core 25, the iron core 25 includes two mutually perpendicular first rods and second rods, the first coil 23 and the second coil 24 are wound on the first rods and the second rods respectively, and when the impact mechanism is used, the first coil 23 and the second coil 24 can be alternately electrified, and two pairs of impact rods 10 are alternately attracted to complete an impact action.
In this embodiment, four spring seats 16 corresponding to the four impact rods 10 one by one are fixed at the bottom of the cross-shaped chassis 19; a snap ring 18 is fixedly sleeved outside the impact rod 10, and the spring 15 is arranged between the snap ring 18 and the spring seat 16; the snap ring 18 is used, on the one hand, as a support surface for the spring 15 and, on the other hand, as a stop ring for limiting the maximum extension of the striking rod 10 out of the anti-settling rod 11.
In this embodiment, the spring seat 16 is made of a polymer material and is provided with a through hole, the iron core 25 is fixed in the through hole, and after the iron core 25 passes through the through hole, the iron core 25 and the spring seat 16 are relatively fixed by using an adhesive, so that the spring seat 16 is used as a support member for the electromagnet 17.
In this embodiment, the outer end of the impact rod 10 forms a drill bit 9 structure, that is, the outer end of the impact rod 10 forms the existing drill bit 9 structure for breaking rock and cooperates with the rotation of the impact rod 10, so that the rock breaking effect is better.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides a concrete composite pile foundation which characterized in that: the anti-settling pile comprises an anti-settling pile implanted into a soil layer, a pile cap coaxially sleeved on the top of the anti-settling pile, and a bearing platform supported on the top of the pile cap; the pile cap is a concrete prefabricated tubular pile, and concrete is filled between the pile cap and the anti-settling pile for fixedly connecting; the anti-settling pile comprises a steel pipe body and an anti-settling mechanism arranged in the pipe body; the anti-settling mechanism comprises four anti-settling rods arranged in a cross shape and four lead screw nut pairs which correspond to the anti-settling rods one by one and are used for driving the anti-settling rods to extend out of the pipe body; a lead screw of each lead screw nut pair is provided with a bevel gear;
the bottom of the bearing platform is provided with a circular groove for embedding the pile cap;
a pile pad made of flexible foamed plastic is arranged above the pile cap, and a plain concrete cushion layer is arranged between the pile pad and the bearing platform;
the anti-settling mechanism further comprises an impact assembly; the impact assembly comprises an impact rod in sliding fit with the center hole of the anti-sinking rod, a spring for pushing the impact rod out to impact rock and soil, a permanent magnet fixed at the tail end of the impact rod, and an electromagnet arranged in the pipe body and used for attracting the permanent magnet to enable the impact rod to compress the spring.
2. The concrete composite pile foundation of claim 1, wherein: the inner circle surface of the center hole of the anti-sinking rod is provided with a spiral groove extending around the axis of the anti-sinking rod, and the impact rod is provided with a support rod in sliding fit with the spiral groove.
3. The concrete composite pile foundation of claim 2, wherein: a cross-shaped chassis is arranged in the pipe body; the four screw rod nut pairs are respectively and correspondingly arranged on four side wings of the cross-shaped chassis, and the four side wings are provided with sliding chutes; a sliding block in sliding fit with the sliding groove is fixed on a nut of the screw-nut pair; the anti-sinking rod is fixed on the sliding block.
4. The concrete composite pile foundation of claim 3, wherein: support arms are integrally formed on two sides of the sliding block; the lower surface of the supporting arm is an arc surface and is crossarm on the side wing through the arc surface.
5. The concrete composite pile foundation of claim 4, wherein: the electromagnet comprises a cross-shaped iron core, and a first coil and a second coil which are wound on the cross-shaped iron core.
6. The concrete composite pile foundation of claim 5, wherein: spring seats which correspond to the four impact rods one by one are fixed at the bottom of the cross-shaped chassis; the fixed overcoat of jump bit has the snap ring, the spring sets up between snap ring and spring holder.
7. The concrete composite pile foundation of claim 6, wherein: the spring holder is made by macromolecular material, and it is equipped with the through-hole, in the iron core is fixed in the through-hole, the outer end of impact rod forms the drill bit structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413061.9A CN108316331B (en) | 2018-05-03 | 2018-05-03 | Concrete composite pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413061.9A CN108316331B (en) | 2018-05-03 | 2018-05-03 | Concrete composite pile foundation |
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| Publication Number | Publication Date |
|---|---|
| CN108316331A CN108316331A (en) | 2018-07-24 |
| CN108316331B true CN108316331B (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810413061.9A Active CN108316331B (en) | 2018-05-03 | 2018-05-03 | Concrete composite pile foundation |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111809599B (en) * | 2020-07-27 | 2021-08-31 | 福建兴港建工有限公司 | Foundation anti-settlement structure and construction method |
| CN113006114A (en) * | 2021-02-10 | 2021-06-22 | 国机集团科学技术研究院有限公司 | Cap-shaped separated lock catch type raft foundation vibration isolation uplift pile design process |
| CN114045823B (en) * | 2021-11-12 | 2022-05-17 | 广东万宜基础工程有限公司 | Composite pile and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201280720Y (en) * | 2008-09-08 | 2009-07-29 | 安徽省高速公路总公司 | Minor diameter self-balancing filling pile root key pushing device |
| CN202031104U (en) * | 2011-02-22 | 2011-11-09 | 陈东曙 | Composite pile |
| CN106638585A (en) * | 2016-11-25 | 2017-05-10 | 淮阴工学院 | Construction platform for facilitating root key construction of root type cast-in-place pile |
| CN106677173A (en) * | 2016-11-25 | 2017-05-17 | 淮阴工学院 | Root key construction device for root pouring pile |
| CN106759305A (en) * | 2017-03-03 | 2017-05-31 | 华北电力大学（保定） | It is a kind of reusable provisionally to descend foundation pile |
-
2018
- 2018-05-03 CN CN201810413061.9A patent/CN108316331B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201280720Y (en) * | 2008-09-08 | 2009-07-29 | 安徽省高速公路总公司 | Minor diameter self-balancing filling pile root key pushing device |
| CN202031104U (en) * | 2011-02-22 | 2011-11-09 | 陈东曙 | Composite pile |
| CN106638585A (en) * | 2016-11-25 | 2017-05-10 | 淮阴工学院 | Construction platform for facilitating root key construction of root type cast-in-place pile |
| CN106677173A (en) * | 2016-11-25 | 2017-05-17 | 淮阴工学院 | Root key construction device for root pouring pile |
| CN106759305A (en) * | 2017-03-03 | 2017-05-31 | 华北电力大学（保定） | It is a kind of reusable provisionally to descend foundation pile |
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| CN108316331A (en) | 2018-07-24 |
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