CN109629556B - Pier variable cross-section vibration isolation pile foundation and construction method thereof - Google Patents
Pier variable cross-section vibration isolation pile foundation and construction method thereof Download PDFInfo
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- CN109629556B CN109629556B CN201910068362.7A CN201910068362A CN109629556B CN 109629556 B CN109629556 B CN 109629556B CN 201910068362 A CN201910068362 A CN 201910068362A CN 109629556 B CN109629556 B CN 109629556B
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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
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
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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
-
- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a pier variable cross-section vibration isolation pile foundation and a construction method thereof, wherein the pier variable cross-section vibration isolation pile foundation comprises a steel pile, an upper section, a middle section and a lower section, wherein the upper section, the middle section and the lower section are sequentially arranged on the periphery of the steel pile in a enclosing mode from top to bottom, the upper section sequentially comprises three layers of vibration isolation layers, a first concrete layer, first corrugated steel and a first concrete retaining wall from inside to outside, the middle section sequentially comprises one layer of vibration isolation layers, a second concrete layer, second corrugated steel and a second concrete retaining wall from inside to outside, the lower section sequentially comprises a third concrete layer, third corrugated steel and a third concrete retaining wall from inside to outside, and the bottom of the lower section is closed. The invention has the advantages that: the construction is convenient, and the cost of the bridge pier is reduced; the single pile structure of the bridge pier has simple form, clear force transmission path and the displacement vibration of the pile top is adapted to the characteristic of bending moment gradually reduced from top to bottom; when the vibration isolation layer diffuses the vibration wave to surrounding soil, part of vibration energy is consumed.
Description
Technical Field
The invention belongs to the technical field of bridge pile construction, and particularly relates to a bridge pier variable cross section vibration isolation pile foundation and a construction method thereof.
Background
Along with the development of bridge facilities, the structure and construction environment of the bridge are more and more complex, and therefore, the stability of the bridge pile body is more and more strictly required. The existing bridge pier foundation is filled with reinforced concrete, the vibration resistance of the bottom of the structure is poor, and when the upper structure of the bridge shakes, the bridge pier is difficult to provide enough vibration damping force, so that the stability of the bridge is reduced.
Disclosure of Invention
According to the defects of the prior art, the invention provides the pier variable cross-section vibration isolation pile foundation and the construction method thereof, and the pile foundation has vibration resistance by arranging three layers of variable cross-section supporting structures at the bottom of the steel pile and arranging vibration isolation layers in the supporting structures.
The invention is realized by the following technical scheme:
the utility model provides a pier variable cross section vibration isolation pile foundation, its characterized in that includes the steel pile and from last to setting gradually the peripheral upper portion section of steel pile, middle part section, lower part section of enclosing, upper portion section is three-layer vibration isolation layer, first concrete layer, first ripple steel, first concrete dado from inside to outside in proper order, middle part section is one deck vibration isolation layer, second concrete layer, second ripple steel, second concrete dado from inside to outside in proper order, lower part section is third concrete layer, third ripple steel, third concrete dado from inside to outside in proper order, the bottom of lower part section is sealed.
The vibration isolation layer comprises an inner concrete layer and an outer high damping rubber layer.
The middle section outside is provided with the anchor bolt support, the anchor bolt support includes a plurality of anchor rods that the level set up, the one end level of anchor rod inserts the soil body, and the other end is connected on the second concrete dado.
The anchor rods are annularly distributed at the periphery of the second concrete retaining wall at different heights.
The upper section, the middle section, and the lower section are all annular structures.
The construction method of the pier variable cross-section vibration isolation pile foundation is characterized by comprising the following steps of: measuring and then determining a construction position; digging a pile hole according to the construction position, implanting first corrugated steel into a hole wall with the depth corresponding to the upper section, and filling a first concrete retaining wall between a soil body and the first corrugated steel; implanting second corrugated steel into the hole wall with the middle section corresponding to the depth, and filling a second concrete retaining wall between the soil body and the second corrugated steel; a third corrugated steel is implanted into the hole wall with the depth corresponding to the lower section, and a third concrete retaining wall is filled between the soil body and the third corrugated steel; sequentially filling a first concrete layer and three vibration isolation layers on the inner side of the first corrugated steel, sequentially filling a second concrete layer and one vibration isolation layer on the inner side of the second corrugated steel, and filling a third concrete layer on the inner side of the third corrugated steel; and placing the steel piles and backfilling the pile holes.
And before the second corrugated steel is implanted, erecting an anchor bolt support in the depth of the middle section, and fixing the end part of an anchor bolt of the anchor bolt support in the second concrete retaining wall when filling the second concrete retaining wall.
The invention has the advantages that: (1) The construction is convenient, the construction speed is high, the reinforced steel bars and concrete materials are greatly saved, and the construction cost of the bridge pier is reduced; (2) The single pile structure of the bridge pier has simple form, clear force transmission path and the displacement vibration of the pile top is adapted to the characteristic of bending moment gradually reduced from top to bottom; (3) When the vibration isolation layer diffuses the vibration wave to surrounding soil, part of vibration energy is consumed.
Drawings
Fig. 1 is a schematic cross-sectional structure of a pier variable cross-section vibration isolation pile foundation according to an embodiment of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings, to facilitate understanding by those skilled in the art:
as shown in fig. 1, the marks in the figure are respectively: the pile comprises a steel pile 1, an upper section 2, a middle section 3, a lower section 4, a first concrete layer 5, first corrugated steel 6, a first concrete retaining wall 7, a second concrete layer 8, second corrugated steel 9, a second concrete retaining wall 10, a third concrete layer 11, third corrugated steel 12, a third concrete retaining wall 13, a concrete layer 14, a high damping rubber layer 15 and an anchor rod 16.
Examples: as shown in fig. 1, the embodiment particularly relates to a pier variable cross-section vibration isolation pile foundation and a construction method thereof, wherein a three-layer variable cross-section support structure is arranged at the bottom of a steel pile 1, and a vibration isolation layer is added in the support structure, so that the pile foundation has vibration resistance.
As shown in fig. 1, the pier variable cross-section vibration isolation pile foundation in this embodiment includes a steel pile 1, and an upper section 2, a middle section 3 and a lower section 4 which are sequentially arranged around the steel pile 1 from top to bottom, wherein the upper section 2 sequentially comprises three layers of vibration isolation layers, a first concrete layer 5, a first corrugated steel 6 and a first concrete retaining wall 7 from inside to outside, the middle section 3 sequentially comprises a layer of vibration isolation layer, a second concrete layer 8, a second corrugated steel 9 and a second concrete retaining wall 10 from inside to outside, the lower section 4 sequentially comprises a third concrete layer 11, a third corrugated steel 12 and a third concrete retaining wall 13 from inside to outside, and the bottom of the lower section 4 is closed. The upper section 2, the middle section 3 and the lower section 4 are all of annular structure. The cross-sectional area of the upper section 2 to the lower section 4 gradually decreases, and bending moment characteristics gradually decreasing from top to bottom are formed. Because the maximum displacement of the pile foundation occurs at the pile top, and the maximum bending moment occurs at the pile top when the pile top is fixed, the pile foundation structure with the variable cross section also adapts to the bending moment characteristic from the pile top to the pile bottom. Because bridge vibration is transmitted from top to bottom, three vibration isolation layers are arranged through the upper section 2 and one vibration isolation layer of the middle section 3, and when vibration waves diffuse to surrounding soil, energy consumption of the two parts exists.
As shown in fig. 1, in the present embodiment, each vibration isolation layer includes an inner concrete layer 14 and an outer high damping rubber layer 15. The vibration waves caused by bridge vibration are attenuated by refraction and reflection on the surfaces of different media of the vibration isolation layer, and the damping energy consumption effect is also achieved in the high damping rubber. The upper section 2 is sequentially provided with a concrete layer 14, a high damping rubber layer 15, a concrete layer 14, corrugated steel and a concrete retaining wall from inside to outside; the middle section 3 is sequentially provided with a concrete layer 14, a high damping rubber layer 15, the concrete layer 14, corrugated steel and a concrete retaining wall from inside to outside; the lower segment 4 is, in order from inside to outside, a concrete layer 14, corrugated steel, a concrete retaining wall.
As shown in fig. 1, in this embodiment, the outer portion of the middle section 3 is provided with an anchor bolt support, which includes a plurality of anchor bolts 16 horizontally arranged, one end of each anchor bolt 16 is horizontally inserted into the soil body, and the other end is connected to the second concrete retaining wall 10. The anchor rods 16 are annularly arranged at the periphery of the second concrete retaining wall 10 at different heights. The anchor bolt support can strengthen the stability of the middle section 3, and can effectively avoid instability caused by the abrupt reduction of the sizes of the upper section 2 and the middle section 3.
As shown in fig. 1, the construction method of the pier variable cross-section vibration isolation pile foundation in the embodiment includes the following steps: and determining a construction position after measurement, wherein the construction position consists of a pile axis and an edge line of an excavated section. And excavating pile holes according to the construction positions, wherein a drilling and blasting method is adopted for excavating, and variable cross-section excavation is carried out from top to bottom in sections, so that an upper section 2, a middle section 3 and a lower section 4 are sequentially excavated. First corrugated steel 6 is implanted into the hole wall of the upper section 2 with the corresponding depth, and a first concrete retaining wall 7 is filled between the soil body and the first corrugated steel 6; a second corrugated steel 9 is implanted into the hole wall of the middle section 3 with the corresponding depth, and a second concrete retaining wall 10 is filled between the soil body and the second corrugated steel 9; a first concrete layer 5 and three vibration isolation layers are sequentially filled on the inner side of the first corrugated steel 6, a second concrete layer 8 and one vibration isolation layer are sequentially filled on the inner side of the second corrugated steel 9, and a third concrete layer 11 is filled on the inner side of the third corrugated steel 12; and placing the steel pile 1 and backfilling pile holes. Before the second corrugated steel 9 is implanted, the anchor supports are set up in depth in the middle section 3 and the anchor rod ends of the anchor supports are fixed in the second concrete retaining wall 10 when the second concrete retaining wall is filled.
This embodiment has the following advantages: the construction is convenient, the construction speed is high, the reinforced steel bars and concrete materials are greatly saved, and the construction cost of the bridge pier is reduced; the single pile structure of the bridge pier has simple form, clear force transmission path and the displacement vibration of the pile top is adapted to the characteristic of bending moment gradually reduced from top to bottom; when the vibration isolation layer diffuses the vibration wave to surrounding soil, part of vibration energy is consumed.
Claims (5)
1. The bridge pier variable cross-section vibration isolation pile foundation is characterized by comprising a steel pile, an upper section, a middle section and a lower section, wherein the upper section, the middle section and the lower section are sequentially arranged on the periphery of the steel pile in a surrounding manner from top to bottom, the upper section sequentially comprises three layers of vibration isolation layers, a first concrete layer, first corrugated steel and a first concrete retaining wall from inside to outside, the middle section sequentially comprises a layer of vibration isolation layer, a second concrete layer, second corrugated steel and a second concrete retaining wall from inside to outside, the lower section sequentially comprises a third concrete layer, a third corrugated steel and a third concrete retaining wall from inside to outside, and the bottom of the lower section is closed;
the vibration isolation layer comprises an inner concrete layer and an outer high damping rubber layer; the middle section outside is provided with the anchor bolt support, the anchor bolt support includes a plurality of anchor rods that the level set up, the one end level of anchor rod inserts the soil body, and the other end is connected on the second concrete dado.
2. The pier variable cross-section vibration isolation pile foundation according to claim 1, wherein the anchor rods are annularly arranged at the periphery of the second concrete retaining wall at different heights.
3. The pier variable cross-section vibration isolation pile foundation of claim 1, wherein the upper section, the middle section and the lower section are all of annular structures.
4. A construction method relating to the pier variable cross-section vibration isolation pile foundation of any one of claims 1 to 3, characterized in that the construction method comprises the following steps: measuring and then determining a construction position; digging a pile hole according to the construction position, implanting first corrugated steel into a hole wall with the depth corresponding to the upper section, and filling a first concrete retaining wall between a soil body and the first corrugated steel; implanting second corrugated steel into the hole wall with the middle section corresponding to the depth, and filling a second concrete retaining wall between the soil body and the second corrugated steel; a third corrugated steel is implanted into the hole wall with the depth corresponding to the lower section, and a third concrete retaining wall is filled between the soil body and the third corrugated steel; sequentially filling a first concrete layer and three vibration isolation layers on the inner side of the first corrugated steel, sequentially filling a second concrete layer and one vibration isolation layer on the inner side of the second corrugated steel, and filling a third concrete layer on the inner side of the third corrugated steel; and placing the steel piles and backfilling the pile holes.
5. The construction method of a pier variable cross-section vibration isolation pile foundation according to claim 4, wherein an anchor bolt support is installed in the middle section depth before the second corrugated steel is implanted, and an anchor bolt end of the anchor bolt support is fixed in the second concrete retaining wall when the second concrete retaining wall is filled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068362.7A CN109629556B (en) | 2019-01-24 | 2019-01-24 | Pier variable cross-section vibration isolation pile foundation and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068362.7A CN109629556B (en) | 2019-01-24 | 2019-01-24 | Pier variable cross-section vibration isolation pile foundation and construction method thereof |
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| Publication Number | Publication Date |
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| CN109629556A CN109629556A (en) | 2019-04-16 |
| CN109629556B true CN109629556B (en) | 2023-10-27 |
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| CN201910068362.7A Active CN109629556B (en) | 2019-01-24 | 2019-01-24 | Pier variable cross-section vibration isolation pile foundation and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112731854B (en) * | 2020-02-12 | 2023-04-14 | 江西省嘉和工程咨询监理有限公司 | Bridge construction monitoring system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007023626A (en) * | 2005-07-19 | 2007-02-01 | Nippon Sharyo Seizo Kaisha Ltd | Vibration-controlled base-isolated structure |
| CN202247965U (en) * | 2011-09-15 | 2012-05-30 | 姚燕明 | Vibration isolation unit between metro depot and pillar bottom bearing platform |
| CN107642040A (en) * | 2017-08-17 | 2018-01-30 | 华东交通大学 | The construction method heavy stone used as an anchor of the hollow clump of piles anchorage of super-large diameter |
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2019
- 2019-01-24 CN CN201910068362.7A patent/CN109629556B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007023626A (en) * | 2005-07-19 | 2007-02-01 | Nippon Sharyo Seizo Kaisha Ltd | Vibration-controlled base-isolated structure |
| CN202247965U (en) * | 2011-09-15 | 2012-05-30 | 姚燕明 | Vibration isolation unit between metro depot and pillar bottom bearing platform |
| CN107642040A (en) * | 2017-08-17 | 2018-01-30 | 华东交通大学 | The construction method heavy stone used as an anchor of the hollow clump of piles anchorage of super-large diameter |
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| CN109629556A (en) | 2019-04-16 |
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