CN110359499B - Raft board-pile connection node with vibration reduction backing plate paved at bottom and construction method thereof - Google Patents
Raft board-pile connection node with vibration reduction backing plate paved at bottom and construction method thereof Download PDFInfo
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- CN110359499B CN110359499B CN201910603884.2A CN201910603884A CN110359499B CN 110359499 B CN110359499 B CN 110359499B CN 201910603884 A CN201910603884 A CN 201910603884A CN 110359499 B CN110359499 B CN 110359499B
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- 230000009467 reduction Effects 0.000 title claims description 29
- 238000010276 construction Methods 0.000 title abstract description 12
- 238000013016 damping Methods 0.000 claims abstract description 40
- 238000004873 anchoring Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 230000002787 reinforcement Effects 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 21
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
-
- 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
-
- 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)
- Foundations (AREA)
Abstract
The invention provides a raft-pile connection node with a damping backing plate paved at the bottom, which comprises a raft (1), a pile body (2), a post-cast raft (3), a bottom damping backing plate (4-1), a damping backing plate (4-2), an upper lapping reinforcing bar (5), a pile head amplifying end (6), a lower lapping reinforcing bar (7) and an anchoring reinforcing bar (8), wherein the raft (1) is vertically supported at the upper part of the pile body (2), the post-cast raft (3) is arranged in a reserved space of the raft (1) and above the pile body (2), the lower lapping reinforcing bar (7), the anchoring reinforcing bar (8) and a short reinforcing bar (9) are arranged in the post-cast raft (3), the upper lapping reinforcing bar (5) and the lower lapping reinforcing bar (7) are respectively lapped with the lapping reinforcing bars thrown out by the raft (1), the pile head amplifying end (6) and the top end of the pile body (2) are connected and are positioned in the reserved space of the raft (1), the bottom damping backing plate (4-1) is positioned at the bottom of the raft (1), and the damping backing plate (4-2) is arranged along the periphery of the pile head amplifying end (6). A corresponding construction method is also provided.
Description
Technical Field
The invention relates to the field of vibration reduction control of structures, in particular to a raft-pile connection node with a vibration reduction backing plate paved at the bottom and a construction method thereof.
Background
The vibration damping backing plate is commonly used for controlling the vibration of a structure, adopts a vibration damping strategy for changing the vibration period, and is a vibration isolation product for reducing the vibration response of the structure by prolonging the self-vibration period of a superstructure.
Along with development of infrastructure construction and land limitation, the vibration control problem of the adjacent structure of the rail transit is more and more remarkable, and the vibration control method has the advantages that the vertical bearing capacity of the vibration reduction base plate is large, the vertical rigidity of the structure is obviously reduced, the influence on building functions is small (the vibration control method is paved at the bottom of a raft board and has little influence on the upper functions), and the vibration control method is widely applied to the vertical vibration control of the adjacent structure of the rail transit and has wide engineering application prospect.
The vibration damping backing plate plays a role, the vibration damping backing plate is required to completely cut off a vibration propagation path, for a common raft foundation with a pile body at the bottom, the pile body and the raft foundation are required to be connected, the paving of the vibration damping backing plate cannot be continuous and closed, the vibration forms a local propagation path through the pile body, the vibration damping effect of the vibration damping backing plate is greatly influenced, and a practical raft-pile connection node and a construction method thereof are required to be provided.
Disclosure of Invention
Aiming at solving the problems that the existing damping backing plate is difficult to realize sealing and poor in damping effect when used for a raft foundation with a pile body, the raft-pile connecting node for paving the damping backing plate at the bottom and the construction method are provided, the structure is simple, the construction is feasible, the damping effect of the damping backing plate is ensured, and the engineering value is higher.
The invention aims to provide a raft-pile connection node with a damping backing plate paved at the bottom, which comprises a raft (1), a pile body (2), a post-cast raft (3), a bottom damping backing plate (4-1), a damping backing plate (4-2), an upper overlapping reinforcing steel bar (5), a pile head amplifying end (6), a lower overlapping reinforcing steel bar (7) and an anchoring reinforcing steel bar (8), wherein the raft (1) is vertically supported at the upper part of the pile body (2), the post-cast raft (3) is arranged in a reserved space of the raft (1) and above the pile body (2), the post-cast raft (3) is internally provided with the lower overlapping reinforcing steel bar (7), the anchoring reinforcing steel bar (8) and a short reinforcing steel bar (9), the upper overlapping reinforcing steel bar (5) and the lower reinforcing steel bar (7) are respectively overlapped with the overlapping reinforcing steel bars thrown out by the pile head amplifying end (6) and are connected with the top end of the pile body (2) and are positioned in the reserved space of the backing plate (1), and the bottom (4-1) is positioned at the periphery of the pile head amplifying end (4-4) along the periphery of the pile head (2).
Preferably, the plane projection size of the pile head enlarged end (6) is 2 times of the diameter size of the pile body (2).
Preferably, the plane dimension of the post-cast raft (3) is 100mm larger than the plane projection dimension of the pile head enlarged end (6).
Preferably, the bottom vibration-damping pad (4-1) is in lap joint with the vibration-damping pad (4-2) with a lap joint length of 100mm.
Preferably, the bottom vibration reduction backing plate (4-1) is tightly attached to the bottoms of the raft plates (1) and the post-cast raft plates (3).
Preferably, the vibration reduction backing plate (4-2) is tightly attached to the surface of the pile head amplifying end (6).
Preferably, the anchoring steel bar (8) stretches into the pile head amplifying end (6) and is bent to form a bending part.
Preferably, the pile head further comprises a short steel bar (9), wherein the short steel bar is welded at one end of the bending part, which is deep into the pile head amplifying end (6), and the short steel bar (9) is perpendicular to the end part of the anchoring steel bar (8).
Preferably, the welding length of the short steel bars (9) is 100mm.
The invention also aims at providing a construction method of the raft-pile connection node with the damping backing plate paved at the bottom, which comprises the following steps:
step one, paving a bottom vibration reduction base plate (4-1);
step two, paving steel bars in the raft (1), casting the concrete of the raft (1) after throwing out part of the lap joint steel bars, and reserving a space of the post-cast raft (3) in the raft (1);
step three, arranging lower lap joint steel bars (7), anchor steel bars (8) and short steel bars (9) in the reserved space, wherein the lower lap joint steel bars (7) are mutually overlapped with the lap joint steel bars thrown out of the raft (1);
pouring the pile head amplifying end (6) in the space reserved in the raft (1);
step five, paving a vibration reduction base plate (4-2) along the periphery of the pile head amplifying end (6) and tightly attaching the vibration reduction base plate, wherein the vibration reduction base plate (4-2) is overlapped with the bottom vibration reduction base plate (4-1);
step six, placing upper lap joint steel bars (5) and mutually lap joint the lap joint steel bars thrown out of the raft (1);
and seventh, pouring the post-cast raft (3).
The invention has the beneficial effects that:
the structure is simple, the construction is feasible, the vibration reduction effect of the vibration reduction backing plate is ensured, and the engineering value is higher.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in view of the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a front view of a raft-pile connection node with a damping shim plate laid at the bottom according to an embodiment of the present invention;
FIG. 2 is a top view of raft-pile connection nodes with damping mats laid at the bottom according to an embodiment of the invention;
in the figure, 1-raft, 2-pile body, 3-post-cast raft, 4-1-bottom vibration damping pad, 4-2-vibration damping pad, 5-upper overlap bar, 6-pile head enlarged end, 7-lower overlap bar, 8-anchor bar, 9-short bar
Detailed Description
Referring to fig. 1-2, a raft-pile connection node embodiment of a damping shim plate is paved at the bottom, and comprises a raft 1, a pile body 2, a post-cast raft 3, a bottom damping shim plate 4-1, a damping shim plate 4-2, an upper lap joint steel bar 5, a pile head enlarged end 6, a lower lap joint steel bar 7, an anchor steel bar 8 and a short steel bar 9. The raft 1 is vertically supported on the upper portion of the pile body 2, the post-cast raft 3 is arranged in a reserved space of the raft 1 and above the pile body 2, a lower overlap joint reinforcing steel bar 7, an anchor reinforcing steel bar 8 and a short reinforcing steel bar 9 are arranged in the post-cast raft 3, the upper overlap joint reinforcing steel bar 5 and the lower overlap joint reinforcing steel bar 7 are respectively overlapped with overlap joint reinforcing steel bars thrown out by the raft 1, and the pile head amplifying end 6 is connected with the top end of the pile body 2 and is positioned in the reserved space of the raft 1.
The pile head enlarged end 6 has a plane projection size which is 2 times of the diameter size of the pile body 2. The plane dimension of the post-cast raft 3 is 100mm larger than the plane projection dimension of the pile head enlarged end 6. The bottom vibration damping backing plate 4-1 is in lap joint with the vibration damping backing plate 4-2, and the lap joint length is 100mm. The bottom vibration reduction backing plate 4-1 is tightly attached to the bottom of the raft 1 and the post-cast raft 3. The vibration damping backing plate 4-2 is arranged along the periphery of the pile head amplifying end 6 and is tightly attached to the surface of the pile head amplifying end 6. The anchor reinforcing steel bar 8 stretches into the pile head enlarged end 6 and is bent, the bent end is along a short reinforcing steel bar 9 with the welding length of 100mm, and the short reinforcing steel bar 9 is perpendicular to the end of the anchor reinforcing steel bar 8.
The raft-pile connection node construction method for paving the vibration reduction backing plate at the bottom in the embodiment comprises the following steps:
step one, paving a bottom vibration reduction backing plate 4-1;
step two, after the steel bars in the raft 1 are paved, and the steel bars of the raft 1 are thrown out of the overlap steel bars at the reserved space, pouring the concrete of the raft 1, and reserving the space along the dotted line in fig. 1;
step three, arranging lower lap reinforcement 7, anchor reinforcement 8 and short reinforcement 9 in the reserved space of the raft 1, wherein the lower lap reinforcement 7 is overlapped with lap reinforcement thrown out of the raft 1;
pouring a pile head amplifying end 6 in a reserved space of the raft 1;
step five, paving a vibration reduction base plate 4-2 along the periphery of the pile head amplifying end 6, closely attaching the vibration reduction base plate 4-2 and overlapping the bottom vibration reduction base plate 4-1;
step six, placing the upper overlap reinforcing steel bars 5 and overlapping the overlap reinforcing steel bars thrown out of the raft 1;
and seventh, pouring post-cast raft 3 in the reserved space of the raft 1.
The raft-pile connection node with the damping backing plate paved at the bottom and the construction method thereof have the advantages of simple structure and convenient construction, and can be used for damping control of adjacent buildings of rail transit.
While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It will be appreciated by those skilled in the art that changes and modifications may be made to the embodiments of the invention without departing from the scope and spirit thereof.
Claims (7)
1. The utility model provides a raft board-stake connected node of damping backing plate is laid to bottom which characterized in that: the vibration-damping pile comprises a raft plate (1), a pile body (2), a post-cast raft plate (3), a bottom vibration-damping backing plate (4-1), a vibration-damping backing plate (4-2), an upper lap reinforcement (5), a pile head amplifying end (6), a lower lap reinforcement (7), an anchor reinforcement (8) and a short reinforcement (9), wherein the raft plate (1) is vertically supported on the upper part of the pile body (2), the post-cast raft plate (3) is arranged in a reserved space of the raft plate (1) and above the pile body (2), the lower lap reinforcement (7), the anchor reinforcement (8) and the short reinforcement (9) are arranged in the reserved space, the upper lap reinforcement (5) and the lower lap reinforcement (7) are respectively overlapped with the lap reinforcement thrown out by the raft plate (1), the pile head amplifying end (6) is connected with the top end of the pile body (2) and is positioned in the reserved space in the pile body (1), the bottom backing plate (4-1) is positioned at the bottom of the raft plate (1), and the vibration-damping backing plate (4-2) is arranged along the periphery of the pile head amplifying end (6);
wherein, the bottom vibration reduction base plate (4-1) is in lap joint with the vibration reduction base plate (4-2), and the lap joint length is 100mm; the vibration reduction base plate (4-2) is tightly attached to the surface of the pile head amplifying end (6); the anchoring steel bar (8) stretches into the pile head amplifying end (6) and is bent to form a bending part; the pile head is characterized by further comprising a short steel bar (9) welded at one end of the bending part penetrating into the pile head amplifying end (6).
2. A raft-pile connection node for bottom-laid vibration dampening mats according to claim 1, wherein: the plane projection size of the pile head enlarged end (6) is 2 times of the diameter size of the pile body (2).
3. A raft-pile connection node for bottom-laid vibration dampening mats according to claim 1, wherein: the plane size of the post-cast raft (3) is 100mm larger than the plane projection size of the pile head enlarged end (6).
4. A raft-pile connection node for bottom-laid vibration dampening mats according to claim 1, wherein: the bottom vibration reduction backing plate (4-1) is tightly attached to the bottom of the raft (1) and the bottom of the post-cast raft (3).
5. A raft-pile connection node for bottom-laid vibration dampening mats according to claim 1, wherein: the short steel bars (9) are perpendicular to the end parts of the anchoring steel bars (8).
6. A raft-pile connection node for bottom-laid vibration dampening mats according to claim 5, wherein: the welding length of the short steel bars (9) is 100mm.
7. A method of constructing a raft-pile connection node for bottom laying of vibration dampening mats according to claim 5 or 6, comprising the steps of:
step one, paving a bottom vibration reduction base plate (4-1);
step two, paving steel bars in the raft (1), casting the concrete of the raft (1) after throwing out part of the lap joint steel bars, and reserving a space of the post-cast raft (3) in the raft (1);
step three, arranging lower lap joint steel bars (7), anchor steel bars (8) and short steel bars (9) in the reserved space, wherein the lower lap joint steel bars (7) are mutually overlapped with the lap joint steel bars thrown out of the raft (1);
pouring the pile head amplifying end (6) in the space reserved in the raft (1);
step five, paving a vibration reduction base plate (4-2) along the periphery of the pile head amplifying end (6) and tightly attaching the vibration reduction base plate, wherein the vibration reduction base plate (4-2) is overlapped with the bottom vibration reduction base plate (4-1);
step six, placing upper lap joint steel bars (5) and mutually lap joint the lap joint steel bars thrown out of the raft (1);
and seventh, pouring the post-cast raft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910603884.2A CN110359499B (en) | 2019-07-05 | 2019-07-05 | Raft board-pile connection node with vibration reduction backing plate paved at bottom and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910603884.2A CN110359499B (en) | 2019-07-05 | 2019-07-05 | Raft board-pile connection node with vibration reduction backing plate paved at bottom and construction method thereof |
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| Publication Number | Publication Date |
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| CN110359499A CN110359499A (en) | 2019-10-22 |
| CN110359499B true CN110359499B (en) | 2024-03-26 |
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| CN201910603884.2A Active CN110359499B (en) | 2019-07-05 | 2019-07-05 | Raft board-pile connection node with vibration reduction backing plate paved at bottom and construction method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188351B (en) * | 2020-01-15 | 2022-03-04 | 济南长兴建设集团有限公司 | Raft foundation for complex terrain |
| 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 |
| CN113006115A (en) * | 2021-02-10 | 2021-06-22 | 国机集团科学技术研究院有限公司 | Design process of conical separated lock catch type raft foundation vibration isolation uplift pile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821182A (en) * | 2013-05-17 | 2014-05-28 | 林建省 | Method utilizing horizontal interlayer between foundations to avoid destructive effect on building upper structure from earthquake horizontal waves |
| KR20150085602A (en) * | 2014-01-16 | 2015-07-24 | (주)골든엔지니어링 | Foundation structure and construction method thereof |
| CN211312620U (en) * | 2019-07-05 | 2020-08-21 | 中国中元国际工程有限公司 | Raft-pile connecting node with vibration reduction base plate laid at bottom |
-
2019
- 2019-07-05 CN CN201910603884.2A patent/CN110359499B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821182A (en) * | 2013-05-17 | 2014-05-28 | 林建省 | Method utilizing horizontal interlayer between foundations to avoid destructive effect on building upper structure from earthquake horizontal waves |
| KR20150085602A (en) * | 2014-01-16 | 2015-07-24 | (주)골든엔지니어링 | Foundation structure and construction method thereof |
| CN211312620U (en) * | 2019-07-05 | 2020-08-21 | 中国中元国际工程有限公司 | Raft-pile connecting node with vibration reduction base plate laid at bottom |
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| CN110359499A (en) | 2019-10-22 |
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