CN112962520A - Hanging plate retaining wall structure of high pile cap of cast-in-place pile and construction method thereof - Google Patents
Hanging plate retaining wall structure of high pile cap of cast-in-place pile and construction method thereof Download PDFInfo
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- CN112962520A CN112962520A CN202110337631.2A CN202110337631A CN112962520A CN 112962520 A CN112962520 A CN 112962520A CN 202110337631 A CN202110337631 A CN 202110337631A CN 112962520 A CN112962520 A CN 112962520A
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- 238000010276 construction Methods 0.000 title claims abstract description 32
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000002262 irrigation Effects 0.000 claims abstract description 3
- 238000003973 irrigation Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000004567 concrete Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 238000009412 basement excavation Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
- E02B3/066—Quays
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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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
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Revetment (AREA)
Abstract
The invention belongs to a cast-in-place pile high pile bearing platform hanging plate retaining wall structure of hydraulic engineering and a construction method thereof, and the technical scheme is as follows: the method comprises a reinforced concrete wall body, a bearing platform, a reinforced concrete hanging plate, a front row foundation cast-in-place pile and a rear row foundation cast-in-place pile; the front row of cast-in-place piles are arranged on the waterside; the back drainage and irrigation pile is arranged on the side close to the shore; pile top elevation of the front row of foundation cast-in-place piles and the rear row of foundation cast-in-place piles is higher than river bottom design elevation; the bearing platform is positioned on the tops of the front row foundation cast-in-place piles and the rear row foundation cast-in-place piles; the reinforced concrete wall body is positioned above the water-facing side of the bearing platform, the water-facing side of the front row foundation cast-in-place pile is provided with a reinforced concrete hanging plate, and the upper side of the reinforced concrete hanging plate is connected with the bearing platform; the bottom elevation of the reinforced concrete hanging plate is below the design elevation of the river bottom. The land acquisition and removal amount after the existing river bank protection is reduced to the maximum extent, and the engineering investment is saved.
Description
Technical Field
The invention relates to water conservancy projects, in particular to a retaining wall structure and a construction method thereof, wherein the retaining wall structure is suitable for retaining a river channel with a built structure and under the condition of a narrow construction site.
Background
The main functions of the hydraulic engineering are flood control and waterlogging removal, and water resource scheduling and water ecological environment improvement are considered. Particularly, some water conservancy districts are suburban low-lying areas, have low ground elevation and are often threatened by flooding over the years. Implementation of hydraulic engineering is beneficial to relieving regional waterlogging removal pressure, improving the overall waterlogging removal guarantee capability of the water conservancy piece, and simultaneously is beneficial to improving the water environment of the piece area, so that water conservancy safety measures with high guarantee rate are provided for the sustainable development of the residential security industry and social economy of the region.
According to flood control and water conservancy planning in each area, two main measures for enhancing flood control and waterlogging removal capability in the area are to improve river surface rate and increase peripheral pump gates. The increase of the river surface rate in the area is to widen the original river channel. Structures such as residential districts, industrial and mining enterprises and roads are often built after riverway retaining walls built in the last century. A newly-built riverway retaining wall relates to influence on the lives of surrounding residents in land acquisition, removal and construction periods.
In recent years, with the construction and development of hydraulic engineering, the appearances of rivers and lakes and ecological environments are changing day by day, and the contradiction between the river channel layout and the surrounding environment in development and construction is increasingly prominent. The overall arrangement of the river engineering not only needs to broaden the original river to meet functional requirements, but also needs to reduce land acquisition and removal cost and reduce influence factors on the surrounding environment.
Therefore, the scale of the river engineering needs to be enlarged according to the planning construction, the river needs to be subjected to survey along the original river in the early stage, a reasonable and economic river layout is selected, the river is often subjected to unilateral widening according to the actual situation on site, the river mouth line on one side with the dense structures behind the original river retaining wall is kept, and the river is widened to the side with few structures on the river bank side.
The retaining wall construction of the original river course side river mouth line is often limited by the influence of the constructed structures behind the wall, and a retaining wall structure which not only meets the specific requirements, but also is safe, reliable and convenient to construct is urgently needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a hanging plate retaining wall structure of a cast-in-place pile high pile bearing platform and a construction method thereof, which furthest reduce land acquisition and removal amount after the conventional river bank protection and save engineering investment.
The technical scheme of the invention is as follows: a kind of pouring pile high pile cap hanging plate retaining wall structure, locate between the built structure and river course; the method comprises a reinforced concrete wall body, a bearing platform, a reinforced concrete hanging plate, a front row foundation cast-in-place pile and a rear row foundation cast-in-place pile; the front row of cast-in-place piles are arranged on the waterside; the back drainage and irrigation pile is arranged on the side close to the shore; pile top elevation of the front row of foundation cast-in-place piles and the rear row of foundation cast-in-place piles is higher than river bottom design elevation; the bearing platform is positioned on the tops of the front row foundation cast-in-place piles and the rear row foundation cast-in-place piles; the newly-built reinforced concrete wall body is positioned above the water-facing side of the bearing platform, the water-facing side of the front row foundation cast-in-place pile is provided with a reinforced concrete hanging plate, and the upper side of the reinforced concrete hanging plate is connected with the bearing platform; the bottom elevation of the reinforced concrete hanging plate is below the design elevation of the river bottom.
Based on the technical characteristics: an impervious curtain is arranged at the rear side of the front row of foundation cast-in-place piles.
Based on the technical characteristics: the seepage-proof curtain is a stirring pile or a high-pressure jet pile.
Based on the technical characteristics: the front row of cast-in-place piles are close-packed cast-in-place piles; the back row filling pile is a filling pile with intervals.
Based on the technical characteristics: when the height of the reinforced concrete hanging plate is more than 1 m, the embedded bars of the front row foundation cast-in-place piles are connected with the reinforced concrete hanging plate.
A construction method of a hanging plate retaining wall structure of a cast-in-place pile high pile cap comprises the following steps:
the method comprises the following steps: firstly, river cut-off cofferdam construction is carried out, and after the cofferdam is finished and accepted, front row foundation cast-in-place piles and rear row foundation cast-in-place piles are constructed on the existing river bank;
step two: carrying out earth excavation on the existing river bank to the designed bearing platform bottom elevation, then carrying out bearing platform construction, and pouring the bearing platform construction, the front row foundation cast-in-place pile and the rear row foundation cast-in-place pile into a whole;
step three: after the front row of foundation cast-in-place piles, the rear row of foundation cast-in-place piles and the bearing platform concrete reach the designed strength, draining the water flow of the river channel, and excavating earthwork in the river channel to the designed river bottom elevation;
step four: and constructing the reinforced concrete wall body and the reinforced concrete hanging plate.
Based on the technical characteristics, the step one also comprises the construction of an impervious curtain.
Based on the technical characteristics, in the fourth step, the reinforced concrete wall body and the reinforced concrete hanging plate are constructed after reinforcing steel bars are embedded in the side faces, connected with the wall body and the reinforced concrete hanging plate, of the bearing platform and the concrete surface is roughened.
Based on the technical characteristics, the method further comprises the following steps: and after the drainage of the riverway is removed, the cofferdam is backfilled to the ground elevation after the reinforced concrete wall body and the wall.
In the scheme, the method comprises the following steps: the elevation of the pile top of the front row of foundation cast-in-place piles and the elevation of the pile top of the rear row of foundation cast-in-place piles are higher than the design elevation of the river bottom, the pile exposed soil is designed to be a high pile, the elevation of a bearing platform is raised by the high pile bearing platform due to the foundation piles, the soil needs to be excavated during the construction of the bearing platform, the larger the buried depth of the bearing platform is, the larger the excavation range of the slope placed behind the wall is, and the larger the land acquisition occupied area. On the contrary, the invention adopts the high pile cap, thus reducing the slope-laying excavation range and land acquisition occupation area. In the prior art, the high piles generally adopt precast sheet piles, but the cast-in-place piles are adopted in the invention, mainly considering that the cast-in-place piles have high rigidity, and in addition, the cast-in-place piles have no vibration and soil squeezing effects during construction, and cannot influence the safety of surrounding buildings. The retaining wall structure is used for hydraulic engineering, and therefore, a reinforced concrete hanging plate is needed, even if front row foundation cast-in-place piles are densely arranged, tight joint is not formed, the distance between the piles is about 10cm, gaps between the cast-in-place piles can be blocked by the reinforced concrete hanging plate, water flow scouring is avoided, and meanwhile, the reinforced concrete hanging plate can play a role in attractiveness.
Through the technical scheme, compared with the prior art, the invention has the following technical effects: the existing river channel river mouth line is well reserved, the newly-built cast-in-place pile high pile bearing platform retaining wall structure can effectively lift the excavation surface of the retaining wall bottom plate, land acquisition and removal amount after the existing river channel bank protection are reduced to the maximum extent, and the engineering investment is saved; the construction of the cast-in-place pile has no soil squeezing effect, the vibration and the noise are low in the construction, and the influence on the surrounding environment in the construction is reduced to the maximum extent; the cast-in-place reinforced concrete hanging plate is arranged in front of the densely-arranged cast-in-place piles, so that the problem that the soil body is lost after the wall is caused by water flow scouring between gaps of the cast-in-place piles is avoided, and the integral stability of the retaining wall is influenced.
Drawings
Fig. 1 is a schematic cross-sectional view of a retaining wall structure of a hanging plate of a high pile cap of a cast-in-place pile.
Element number description:
1 reinforced concrete wall
2 bearing platform
3 reinforced concrete hanging plate
4 back row foundation cast-in-place pile
5 front row foundation filling pile
6 impervious curtain
7 constructed structure
8-backfilled soil
River bottom design elevation
B water level
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, a retaining wall structure of a hanging plate of a high pile bearing platform of a cast-in-place pile is positioned between a built structure 7 and a river channel, and comprises a newly-built reinforced concrete wall body 1, a bearing platform 2, a reinforced concrete hanging plate 3, a rear row foundation cast-in-place pile 4, a front row foundation cast-in-place pile 5 and an impervious curtain 6 of the front row foundation cast-in-place pile.
The foundation cast-in-place piles are arranged in two rows, the front row of cast-in-place piles 5 are arranged on the side close to water and are densely arranged cast-in-place piles, the distance between the densely arranged cast-in-place piles is generally 10cm, the reinforced concrete hanging plate 3 is arranged on the side close to water of the front row of foundation cast-in-place piles 5, the anti-seepage curtain 6 is arranged on the side close to soil of the front row of cast-in-place piles 5, and the anti-seepage curtain 6 adopts mixing piles, high-spraying piles and the like according to the conditions of selecting. The back row foundation cast-in-place pile 4 is arranged on the side close to the shore and is a cast-in-place pile with intervals, and the size of the intervals is determined according to the stress condition.
The pile top elevation of the front row of foundation cast-in-place piles 5 and the rear row of foundation cast-in-place piles 4 is higher than the river bottom design elevation A; the bearing platform 2 is positioned on the pile tops of the front row of foundation cast-in-place piles 5 and the rear row of foundation cast-in-place piles 4 and integrally cast with the foundation cast-in-place piles together; the reinforced concrete wall body 1 is positioned above the water-facing side of the bearing platform 2, the reinforced concrete hanging plate 3 is positioned below the bearing platform 2, and the upper side of the reinforced concrete hanging plate is connected with the bearing platform 2; the bottom elevation of the reinforced concrete hanging plate 3 is below the design elevation A of the river bottom, and is generally 0.5 meter below the design elevation of the river bottom.
Whether the reinforced concrete link plate 3 is connected with the front row foundation cast-in-place pile 5 or not is considered according to the height, if the height of the reinforced concrete link plate 3 is less than 1 meter, the connection with the front row foundation cast-in-place pile 5 can not be considered, and if the height of the reinforced concrete link plate 3 is more than 1 meter, the steel bars can be planted on the front row foundation cast-in-place pile 5 and connected with the reinforced concrete link plate 3.
When the method is implemented, the construction can be carried out according to the following sequence of example, and the construction sequence is not changed.
Firstly, river cut-off cofferdam construction is carried out, and after the cofferdam is finished and checked, the construction of a front row of foundation cast-in-place piles 5, a rear row of foundation cast-in-place piles 4 and an anti-seepage curtain 6 is carried out on the bank of the existing river mouth.
And secondly, after the front row of foundation cast-in-place piles 5, the rear row of foundation cast-in-place piles 4 and the impervious curtain 6 are constructed, earth excavation is carried out on the river bank to the designed height of the bottom of the bearing platform, then the bearing platform 2 is constructed, and the foundation cast-in-place piles are cast into a whole. The extent of excavation should not affect the safety of the onshore established structure 7.
And thirdly, after the concrete of the front row of foundation cast-in-place piles 5, the rear row of foundation cast-in-place piles 4 and the bearing platform 2 reaches the design strength, draining the water flow of the river channel, and excavating earthwork in the river channel to the design river bottom design elevation A.
Fourthly, constructing the reinforced concrete wall body 1 and the reinforced concrete hanging plate 3. Because the reinforced concrete wall body 1, the reinforced concrete hanging plate 3 and the bearing platform 2 are poured twice, the side surfaces of the bearing platform 2, the reinforced concrete wall body 1 and the reinforced concrete hanging plate 3, which are connected, are embedded with reinforcing steel bars in advance and subjected to roughening treatment on the concrete surface, the embedded reinforcing steel bars meet the requirement of anchoring length of the stressed reinforcing steel bars, and the wall body, the hanging plate and the bearing platform are ensured to be poured into a whole.
Fifthly, after removing the riverway water from the cofferdam and discharging the water to the water level B, backfilling the soil behind the wall to the ground elevation, namely, backfilling the backfilling soil 8 behind the reinforced concrete wall body 1.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a high pile cap link plate retaining wall structure of bored concrete pile which characterized in that: between the constructed structure (7) and the river; comprises a reinforced concrete wall body (1), a bearing platform (2), a reinforced concrete hanging plate (3), a front row foundation cast-in-place pile (5) and a rear row foundation cast-in-place pile (4); the front row of cast-in-place piles (5) are arranged on the waterside; the rear irrigation and drainage pile (4) is arranged on the side close to the shore; the pile top elevation of the front row of foundation cast-in-place piles (5) and the rear row of foundation cast-in-place piles (4) is higher than the river bottom design elevation; the bearing platform (2) is positioned at the pile tops of the front row of foundation cast-in-place piles (5) and the rear row of foundation cast-in-place piles (4); the reinforced concrete wall body (1) is positioned above the water-facing side of the bearing platform (2), the reinforced concrete hanging plate (3) is arranged on the water-facing side of the front row foundation cast-in-place pile (5), and the upper side of the reinforced concrete hanging plate (3) is connected with the bearing platform (2); the bottom elevation of the reinforced concrete hanging plate (3) is below the river bottom design elevation.
2. The retaining wall structure of the hanging plate of the high pile bearing platform of the cast-in-place pile according to claim 1, wherein: and an impervious curtain (6) is arranged at the rear side of the front row foundation cast-in-place pile (5).
3. The retaining wall structure of the hanging plate of the high pile bearing platform of the cast-in-place pile according to claim 2, wherein: the seepage-proof curtain is a stirring pile or a high-pressure jet pile.
4. The retaining wall structure of the hanging plate of the high pile bearing platform of the cast-in-place pile according to claim 1, wherein: the front row of cast-in-place piles (5) are densely arranged cast-in-place piles; the rear row of cast-in-place piles (4) are spaced cast-in-place piles.
5. The retaining wall structure of the hanging plate of the high pile bearing platform of the cast-in-place pile according to claim 1, wherein: when the height of the reinforced concrete hanging plate (3) is larger than 1 m, the embedded bars of the front row foundation cast-in-place piles (5) are connected with the reinforced concrete hanging plate (3).
6. The construction method of the bored concrete pile high pile cap hanging plate retaining wall structure according to claim 2, comprising the steps of:
the method comprises the following steps: firstly, river cut-off cofferdam construction is carried out, and after the cofferdam is finished and accepted, the front row of foundation cast-in-place piles (5) and the rear row of foundation cast-in-place piles (4) are constructed on the existing river bank;
step two: carrying out earth excavation on the existing river bank to the designed bearing platform bottom elevation, then carrying out construction on the bearing platform (2), and pouring the bearing platform and the front row foundation cast-in-place pile (5) and the rear row foundation cast-in-place pile (4) into a whole;
step three: after the front row of foundation cast-in-place piles (5), the rear row of foundation cast-in-place piles (4) and the bearing platform (2) reach the design strength, draining the water flow of the river channel, and excavating earthwork in the river channel to reach the designed river bottom elevation;
step four: and constructing the reinforced concrete wall body (1) and the reinforced concrete hanging plate (3).
7. The construction method of the bored concrete pile high pile cap hanging plate retaining wall structure according to claim 6, characterized in that:
in the first step, the construction of the impervious curtain (6) is also included.
8. The construction method of the bored concrete pile high pile cap hanging plate retaining wall structure according to claim 6, characterized in that: in the fourth step: and after the bearing platform (2) is embedded with the side face embedded steel bars connected with the reinforced concrete wall body (1) and the reinforced concrete hanging plate (3) and the roughening treatment is carried out on the concrete surface, the reinforced concrete wall body (1) and the reinforced concrete hanging plate (3) are constructed.
9. The construction method of the bored concrete pile high pile cap hanging plate retaining wall structure according to claim 6, 7 or 8, further comprising the step five: and after the cofferdam is dismantled and the riverway water is discharged, backfilling the soil behind the reinforced concrete wall body (1) to the ground elevation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337631.2A CN112962520A (en) | 2021-03-30 | 2021-03-30 | Hanging plate retaining wall structure of high pile cap of cast-in-place pile and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337631.2A CN112962520A (en) | 2021-03-30 | 2021-03-30 | Hanging plate retaining wall structure of high pile cap of cast-in-place pile and construction method thereof |
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| CN112962520A true CN112962520A (en) | 2021-06-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250744A (en) * | 2021-12-25 | 2022-03-29 | 苏州市水利设计研究院有限公司 | Novel ecological combined river slope retaining wall revetment |
| CN114960533A (en) * | 2022-05-01 | 2022-08-30 | 上海宝冶集团有限公司 | Protection method for tall building in river channel widening process |
-
2021
- 2021-03-30 CN CN202110337631.2A patent/CN112962520A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250744A (en) * | 2021-12-25 | 2022-03-29 | 苏州市水利设计研究院有限公司 | Novel ecological combined river slope retaining wall revetment |
| CN114960533A (en) * | 2022-05-01 | 2022-08-30 | 上海宝冶集团有限公司 | Protection method for tall building in river channel widening process |
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