CN115341550A - River-crossing foundation pit diversion system combined with foundation pit support structure and construction method - Google Patents
River-crossing foundation pit diversion system combined with foundation pit support structure and construction method Download PDFInfo
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- CN115341550A CN115341550A CN202211019321.7A CN202211019321A CN115341550A CN 115341550 A CN115341550 A CN 115341550A CN 202211019321 A CN202211019321 A CN 202211019321A CN 115341550 A CN115341550 A CN 115341550A
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- foundation pit
- cofferdam
- diversion
- river
- pipe culvert
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims description 10
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
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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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Revetment (AREA)
- Foundations (AREA)
Abstract
The invention provides a river-crossing foundation pit diversion system combined with a building envelope and a construction method thereof. The system comprises a cofferdam, cofferdam filling, a foundation pit enclosure wall, a diversion pipe culvert, a pipe culvert supporting beam plate and foundation pit support and a pipe culvert base. Set up interim cofferdam and construction enclosure wall in the river course, the diversion culvert passes through enclosure wall and interim cofferdam, and the diversion culvert below sets up the supporting beam board and does the foundation ditch support concurrently, and the culvert below sets up the base and is connected with the supporting beam board. The river-crossing foundation pit diversion system can implement temporary cofferdams, foundation pit supports and diversion culvert pipes in stages, so that water can pass through the temporary culvert pipes in the processes of excavation and construction of the foundation pit, the river is prevented from being cut off or changed, and the influence of the implementation of the river-crossing foundation pit on the river is reduced.
Description
The technical field is as follows:
the invention belongs to the field of municipal foundation pit engineering, and particularly relates to a river-crossing foundation pit guide system and a construction method thereof.
The background art comprises the following steps:
along with the continuous rapid development of urban municipal infrastructure, the engineering scales of urban municipal tunnels, pipe galleries, water supply and drainage and the like are continuously increased, the foundation pit engineering crossing the river channel is difficult to avoid, when the river channel is wide and has line-spreading conditions, the technical schemes of a shield method, a pipe-jacking method or a mine method and the like can be adopted, but when the river channel is narrow and the depth of the foundation pit is shallow, the open cut method is more adopted for implementation.
River channel cutoff, temporary relocation or stage cofferdam implementation schemes are adopted in river channel cut-off, temporary relocation or stage cofferdam construction in urban municipal engineering open cut method, river channel cut-off is convenient for foundation pit engineering construction, but influences on regional river channels are large, and the method is particularly very unfavorable for flood prevention in flood season and is generally applied less; the temporary relocation scheme is a scheme which is applied more in river-crossing foundation pit engineering, can meet the requirement of river channel water passing, but is often difficult to adopt when the site is limited; the cofferdam in different periods needs to be provided with a cofferdam and a foundation pit in two periods in a river channel, certain requirements are imposed on the width of the river channel, the construction is complex, the construction period of the foundation pit is prolonged, and the construction in the flood season is difficult.
When the scale of the river channel is not large, the river-crossing foundation pit diversion system combined with the enclosure structure is adopted, the enclosure structure and the diversion system are completed in the non-flood period, water is introduced in time, the influence time on the water passing of the river channel is short, the structure penetrating through the river channel can be implemented at the same time, the structural connection difficulty and the construction step are reduced, the construction period is shortened, the investment of the whole foundation pit engineering is reduced, and the method is economical and effective.
The invention content is as follows:
aiming at part or all of the problems in the prior art, the invention provides a system for realizing river channel water passing in a river-crossing foundation pit construction process and a construction method thereof, so as to achieve the purposes of utilizing a pipe culvert to realize that the river channel water passing is not greatly influenced during the excavation of a foundation pit and the construction of a structure, and avoiding the influence of cutoff or relocation on the river channel.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides a river-crossing foundation pit diversion system combined with a foundation pit support structure, which comprises: the cofferdam comprises a cofferdam body, cofferdam filling soil, a retaining wall and a diversion culvert, and is characterized in that the cofferdam body is arranged in a river channel, the retaining wall is arranged in the cofferdam body, and the retaining wall comprises a foundation pit retaining wall below a riverbed and a foundation pit retaining wall above the riverbed; the diversion pipe culvert is laid along the bottom surface of the river bed in the range of the cofferdam and penetrates through the cofferdam; and a backfilled cofferdam filling soil is arranged between the cofferdam and the foundation pit enclosure wall below the riverbed, and the diversion culvert penetrates through the enclosure wall and the cofferdam to form a water passing channel with the foundation pit enclosure wall above the riverbed.
Furthermore, the enclosure wall is an underground continuous wall or a filling pile and a waterproof curtain.
Furthermore, the foundation pit enclosure wall below the riverbed is implemented in a hole forming or grooving mode, and the foundation pit enclosure wall above the riverbed is implemented in a vertical mold cast-in-place mode.
Further, in order to guarantee that the diversion pipe culvert is smooth-going and stable, the diversion pipe culvert base is arranged below the diversion pipe culvert, the diversion pipe culvert base is placed on the horizontal supporting beam plate and is connected with the horizontal supporting beam plate, the vertical load that the supporting beam plate bears the diversion pipe culvert is also used as foundation pit horizontal support.
Furthermore, the supporting beam plate is made of reinforced concrete, and the guide pipe culvert base is made of cast-in-place reinforced concrete.
The invention also provides a construction method of the river-crossing foundation pit diversion system combined with the foundation pit support structure, which comprises the following steps:
s1, building a cofferdam, and meanwhile installing a diversion pipe culvert within the range of the cofferdam, wherein the diversion pipe culvert penetrates through the cofferdam;
s2, constructing a foundation pit enclosure wall below the riverbed by adopting a grooving or pore-forming mode, and implementing that a pipe culvert supporting beam plate in the foundation pit range is also used as a foundation pit support;
s3, constructing a diversion pipe culvert base, and arranging the rest diversion pipe culverts above the diversion pipe culvert base;
s4, constructing a foundation pit enclosure wall above the riverbed in a cast-in-place mode through a vertical mold, embedding the guide pipe culvert in the foundation pit enclosure wall below the riverbed, and performing waterproof treatment between the guide pipe culvert and the foundation pit enclosure wall below the riverbed;
s5, backfilling cofferdam filling soil between the cofferdam and a foundation pit enclosure wall below the riverbed, and penetrating the diversion pipe culvert;
s6, excavating and building a structure according to a normal foundation pit construction step sequence under the condition that the guide pipes are filled with water;
and S7, completing the construction of the structure, chiseling or excavating a foundation pit enclosure wall below the riverbed, a foundation pit enclosure wall above the riverbed, the diversion pipe culvert, the supporting beam plate, the diversion pipe culvert base, the cofferdam and the cofferdam filled soil, and recovering the riverway.
Compared with the prior art, the invention has the beneficial effects that:
firstly, under the condition of limited site conditions around the city, river channel relocation and expropriation and removal are not required to be set; secondly, diversion pipe culverts and foundation pit support can be completed in a short time by adopting the stage cofferdam in the non-flood season, and flood season overflow is guaranteed; thirdly, the problems that the construction period of the river-crossing foundation pit sectional cofferdam foundation pit is too long and the construction is difficult to complete in the non-flood period are solved, and the difficulty of structural connection is reduced. Compared with the prior art, the river-crossing foundation pit diversion system combined with the foundation pit support structure has the advantages of simplicity and convenience in construction, reasonable stress and high economic benefit.
Description of the drawings:
FIG. 1 is a floor plan of an embodiment of the present invention;
FIG. 2 is a longitudinal section of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an embodiment of the present invention;
in the figure: 1, cofferdam; filling soil in a cofferdam; 3, a foundation pit enclosure wall below the riverbed; 4, a foundation pit enclosure wall above the riverbed; 5, guiding the pipe culvert; 6 supporting the beam plate; 7, a diversion pipe culvert base.
The specific implementation mode is as follows:
the present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which specific embodiments of the invention are shown, and in which it is apparent that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art, are within the scope of protection of the present invention.
Examples
The embodiment adopts a river-crossing foundation pit diversion system combined with a building enclosure, as shown in fig. 1-3, including: cofferdam, cofferdam filling, enclosure wall and diversion culvert. The cofferdam 1 is arranged in the river channel. The enclosure wall is arranged in the cofferdam 1 and comprises a foundation pit enclosure wall 3 below the riverbed and a foundation pit enclosure wall 4 above the riverbed. The diversion culvert 5 is laid along the bottom surface of the river bed in the range of the cofferdam 1 and penetrates through the cofferdam 1. And backfilled cofferdam filling soil 2 is arranged between the cofferdam 1 and a foundation pit enclosure wall 3 below the riverbed. The guide pipe culvert 5 penetrates through the enclosure wall and the cofferdam 1 to form a water passing channel with the foundation pit enclosure wall 4 above the riverbed. The enclosure wall is an underground continuous wall or a filling pile and a waterproof curtain. The utility model discloses a horizontal foundation ditch horizontal support of diversion pipe culvert 5, including the horizontal supporting beam board 6, the vertical load that supporting beam board 6 bore diversion pipe culvert 5 is used as foundation ditch horizontal support simultaneously, and the diversion pipe culvert base 7 is set up to diversion pipe culvert 5 below, and diversion pipe culvert base 7 is placed on the horizontally supporting beam board 6 and is connected with it, supporting beam board 6 bears the vertical load of diversion pipe culvert 5. The supporting beam plate 6 is made of reinforced concrete, and the guide pipe culvert base 7 is made of cast-in-place reinforced concrete.
The construction method of the river-crossing foundation pit diversion system provided by the embodiment comprises the following steps:
s1, building a cofferdam 1, and meanwhile installing a diversion pipe culvert 5 in the range of the cofferdam 1, wherein the diversion pipe culvert 5 penetrates through the cofferdam 1;
s2, constructing a foundation pit enclosure wall 3 below the riverbed in a grooving or pore-forming mode, and implementing that a pipe culvert supporting beam plate 6 in the foundation pit range is also used as a foundation pit support;
s3, constructing a diversion pipe culvert base 7, and arranging the rest diversion pipe culverts 5 above the diversion pipe culvert base 7;
s4, constructing a foundation pit enclosure wall 4 above the riverbed in a cast-in-place mode through a vertical mold, embedding the diversion pipe culvert 5 in the foundation pit enclosure wall 3 below the riverbed, and performing waterproof treatment between the diversion pipe culvert 5 and the foundation pit enclosure wall 3 below the riverbed;
s5, filling cofferdam filling soil 2 between the cofferdam 1 and a foundation pit enclosure wall 3 below the riverbed, and penetrating through the diversion pipe culvert 5;
s6, under the condition that the diversion pipe culvert 5 is filled with water, excavating and building a structure back according to the normal foundation pit construction step sequence;
and S7, completing the construction of the structure, chiseling or excavating the foundation pit enclosure wall 3 below the riverbed, the foundation pit enclosure wall 4 above the riverbed, the diversion culvert 5, the supporting beam plate 6, the diversion culvert base 7, the cofferdam 1 and the cofferdam filling 2, and recovering the riverway.
While the present invention has been described in detail by way of the foregoing embodiments, it should be recognized that the foregoing description should not be construed as limiting the invention, which should be limited only by the scope of the appended claims.
Claims (6)
1. A river-crossing foundation pit diversion system combined with a foundation pit support structure comprises: the cofferdam comprises a cofferdam (1), cofferdam filling (2), a retaining wall and a diversion culvert (5), and is characterized in that the cofferdam (1) is arranged in a river channel, the retaining wall is arranged in the cofferdam (1), and the retaining wall comprises a foundation pit retaining wall (3) below a riverbed and a foundation pit retaining wall (4) above the riverbed; the diversion pipe culvert (5) is laid along the bottom surface of the river bed within the range of the cofferdam (1) and penetrates through the cofferdam (1); the construction method is characterized in that backfilled cofferdam filling soil (2) is filled between the cofferdam (1) and the foundation pit enclosure wall (3) below the riverbed, and the diversion culvert (5) penetrates through the enclosure wall and the cofferdam (1) to form a water passing channel with the foundation pit enclosure wall (4) above the riverbed.
2. The river-crossing foundation pit diversion system combined with the foundation pit enclosure structure as claimed in claim 1, wherein the enclosure walls are underground continuous walls or cast-in-place piles and waterproof curtains.
3. The river-crossing foundation pit flow guide system combined with the foundation pit support structure is characterized in that the foundation pit enclosure wall (3) below the riverbed is implemented in a hole forming or grooving mode, and the foundation pit enclosure wall (4) above the riverbed is implemented in a vertical mold cast-in-place mode.
4. The river-crossing foundation pit diversion system combined with a foundation pit enclosure structure is characterized in that a diversion pipe culvert base (7) is arranged below the diversion pipe culvert (5), the diversion pipe culvert base (7) is placed on and connected with a horizontal supporting beam plate (6), and the supporting beam plate (6) bears the vertical load of the diversion pipe culvert (5) and serves as a horizontal support of the foundation pit.
5. The river-crossing foundation pit diversion system combined with a foundation pit enclosure structure as claimed in claim 1, wherein said support beam plate (6) is made of reinforced concrete, and the diversion pipe culvert base (7) is made of cast-in-place reinforced concrete.
6. The construction method of the river-crossing foundation pit diversion system combined with the foundation pit support structure as claimed in claim 1, comprising the steps of:
s1, building a cofferdam (1), and meanwhile installing a diversion pipe culvert (5) in the range of the cofferdam (1), wherein the diversion pipe culvert (5) penetrates through the cofferdam (1);
s2, constructing a foundation pit enclosure wall (3) below the riverbed in a grooving or pore-forming mode, and implementing that a pipe culvert supporting beam plate (6) in the foundation pit range is also used as a foundation pit support;
s3, constructing a diversion pipe culvert base (7), and arranging the rest diversion pipe culverts (5) above the diversion pipe culvert base (7);
s4, constructing a foundation pit enclosure wall (4) above the riverbed in a cast-in-place mode through a vertical mold, embedding the diversion pipe culvert (5) in the foundation pit enclosure wall (3) below the riverbed, and performing waterproof treatment between the diversion pipe culvert (5) and the foundation pit enclosure wall (3) below the riverbed;
s5, backfilling cofferdam filling soil (2) between the cofferdam (1) and a foundation pit enclosure wall (3) below the riverbed, and penetrating the diversion pipe culvert (5);
s6, under the condition that the diversion pipe culvert (5) is filled with water, excavating and building a structure back according to the normal foundation pit construction step sequence;
s7, completing the construction, chiseling or excavating a foundation pit enclosure wall (3) below the riverbed, a foundation pit enclosure wall (4) above the riverbed, a diversion pipe culvert (5), a supporting beam plate (6), a diversion pipe culvert base (7), a cofferdam (1) and cofferdam filling soil (2), and recovering the riverway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211019321.7A CN115341550B (en) | 2022-08-24 | 2022-08-24 | River-crossing foundation pit diversion system combined with foundation pit support structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211019321.7A CN115341550B (en) | 2022-08-24 | 2022-08-24 | River-crossing foundation pit diversion system combined with foundation pit support structure and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN115341550A true CN115341550A (en) | 2022-11-15 |
| CN115341550B CN115341550B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211019321.7A Active CN115341550B (en) | 2022-08-24 | 2022-08-24 | River-crossing foundation pit diversion system combined with foundation pit support structure and construction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470921A1 (en) * | 1990-06-22 | 1992-02-12 | Construcciones Desmontables Tubulares, S.A. | Improved modular shoring system |
| CN207111094U (en) * | 2017-08-11 | 2018-03-16 | 中铁第一勘察设计院集团有限公司 | Ultra-deep shield launching in a kind of water/hang out well construction |
| CN108755720A (en) * | 2018-06-14 | 2018-11-06 | 中国十七冶集团有限公司 | The relatively narrow river water method of river diversion for crossing water river is worn under large-scale synthesis piping lane |
| CN112523233A (en) * | 2020-11-09 | 2021-03-19 | 上海建工七建集团有限公司 | Construction method of water-through type river-blocking cofferdam |
-
2022
- 2022-08-24 CN CN202211019321.7A patent/CN115341550B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470921A1 (en) * | 1990-06-22 | 1992-02-12 | Construcciones Desmontables Tubulares, S.A. | Improved modular shoring system |
| CN207111094U (en) * | 2017-08-11 | 2018-03-16 | 中铁第一勘察设计院集团有限公司 | Ultra-deep shield launching in a kind of water/hang out well construction |
| CN108755720A (en) * | 2018-06-14 | 2018-11-06 | 中国十七冶集团有限公司 | The relatively narrow river water method of river diversion for crossing water river is worn under large-scale synthesis piping lane |
| CN112523233A (en) * | 2020-11-09 | 2021-03-19 | 上海建工七建集团有限公司 | Construction method of water-through type river-blocking cofferdam |
Non-Patent Citations (1)
| Title |
|---|
| 郭大焕: "堰体施工", 水底隧道明挖深基坑施工技术, vol. 9, no. 4, pages 75 - 77 * |
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| CN115341550B (en) | 2024-06-14 |
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