CN110565592A - cofferdam bottom pressure-bearing block structure suitable for unevenness and bearing capacity of canal lining - Google Patents
cofferdam bottom pressure-bearing block structure suitable for unevenness and bearing capacity of canal lining Download PDFInfo
- Publication number
- CN110565592A CN110565592A CN201910739700.5A CN201910739700A CN110565592A CN 110565592 A CN110565592 A CN 110565592A CN 201910739700 A CN201910739700 A CN 201910739700A CN 110565592 A CN110565592 A CN 110565592A
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- Prior art keywords
- cofferdam
- bearing
- bearing block
- pressure
- unevenness
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 6
- 229920001875 Ebonite Polymers 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
-
- 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
Abstract
the invention discloses a cofferdam bottom pressure-bearing block structure suitable for unevenness and bearing capacity of canal lining, wherein a pressure-bearing block (2) is arranged at the bottom of a cofferdam (1), and the pressure-bearing block (2) is uniformly arranged along the direction from the upstream surface to the downstream surface of the bottom of the cofferdam (1); and an anti-seepage water stop (3) is arranged on the water facing side of the bottom of the cofferdam (1). The cofferdam overcomes the defect that the cofferdam in the prior art is fallen on an uneven lining plate and is untight in combination, has certain deformation capacity of the pressure-bearing block, can adapt to local slab staggering, bulging and the like of the lining plate, and has the advantage that the lining plate cannot be damaged due to local stress concentration.
Description
Technical Field
The invention relates to the technical field of construction flow guide of hydraulic and hydroelectric engineering, in particular to a cofferdam bottom pressure-bearing block structure suitable for unevenness and bearing capacity of canal lining.
Background
the water delivery channel of the water transfer engineering is influenced by various factors such as channel water level change, drainage system operation condition, freeze thawing, construction quality and the like, and the concrete lining plate can be damaged in the forms of cracking, collapse, anti-floating instability and the like, so that the safe operation of the channel is influenced. When the channel is repaired under the condition of not interrupting the water delivery of the channel, a dry ground foundation pit is formed by adopting the cofferdam. In order to avoid damaging the concrete structure of the channel and polluting water quality, the cofferdam is of a steel structure or a concrete structure.
The conventional cofferdam bottom steel plate or concrete bottom plate is directly contacted with the canal lining plate, but the lining plate has certain unevenness, the cofferdam falls on the uneven lining plate, the combination is not tight, the cofferdam is unstable and is easy to destabilize; when the lining plate has local slab staggering and protrusion, the pressure at the bottom of the cofferdam is concentrated at the slab staggering and protrusion positions and possibly exceeds the bearing capacity of the lining plate, so that the lining plate is damaged.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provides a cofferdam bottom pressure-bearing block structure which is suitable for the unevenness and the bearing capacity of the canal lining.
The purpose of the invention is implemented by the following technical scheme: the cofferdam bottom pressure-bearing block structure is suitable for the unevenness and the bearing capacity of the canal lining; it is located in the canal, and the canal is internally provided with a lining plate.
A cofferdam is arranged on the lining plate, the cofferdam divides the channel into two parts, one side is an overflow part arranged on the water facing side, and the other side is a repair foundation pit arranged on the back water side;
The bottom of the cofferdam is provided with pressure-bearing blocks which are uniformly arranged along the direction from the upstream surface to the downstream surface of the cofferdam bottom; and the water-facing side of the bottom of the cofferdam is provided with anti-seepage water stop.
in the above technical scheme: the cofferdam is characterized in that the bearing blocks are formed by a plurality of strip-shaped bearing blocks, a drainage channel is arranged between every two adjacent strip-shaped bearing blocks, and the width and the distance of each bearing block are consistent with the length of the cofferdam from the upstream surface to the downstream surface.
In the above technical scheme: the bearing blocks can be decomposed into a plurality of blocky bearing blocks, and each blocky bearing block is provided with a water drainage groove.
In the above technical scheme: the laying area of the pressure bearing blocks is not less than three-fourths of the area of the bottom of the cofferdam.
In the above technical scheme: the bearing block is made of hard rubber materials.
The invention has the following advantages: firstly, the bearing blocks are arranged at the bottom of the cofferdam at intervals, and the characteristic of transverse extension of rubber under pressure is utilized, so that the bearing blocks are easier to transversely extend and more easily compressed, the deformation of the bearing blocks is facilitated to adapt to the unevenness of the channel lining plate, and the cofferdam is stably positioned on the lining plate.
Secondly, the area of the bearing block can reach 3/4 of the area of the bottom of the cofferdam, even more, and the sufficient contact area with the lining plate can be ensured, so that the pressure of the cofferdam meets the bearing capacity of the lining plate.
The bearing block is made of hard rubber materials, the friction coefficient of the bearing block and the concrete lining plate is large, and enough contact surfaces provide enough friction force to meet the requirement of cofferdam stability.
The bearing block has certain deformation capacity, can adapt to local slab staggering, bulging and the like of the lining plate, and cannot cause local stress concentration to damage the lining plate.
According to the cofferdam and the method, the arrangement of an anti-seepage structure between the cofferdam and the lining plate is combined, the anti-seepage water stop is arranged on the water-facing side of the bottom of the cofferdam, and the grooves among the pressure-bearing blocks can play a role in draining water to the backwater side of the cofferdam, so that the uplifting pressure is reduced, and the stability of the cofferdam is facilitated.
the cofferdam adopting the technical scheme of the invention can repair the channel without interrupting water supply, and has great social benefit and economic benefit. For example, in the first stage project of central line regulation in south-to-north water, after the central line main canal is put into operation, the central line main canal is responsible for the water supply tasks of the residents living and industrial production in the large and medium-sized cities such as Beijing, Tianjin and the like, once the water supply is interrupted, the influence range is wide, and the social influence is large.
drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a layout view of the bearing blocks at the bottom of the cofferdam of the present invention.
Fig. 4 is a cross-sectional view of the present invention.
In the figure: the water-saving foundation pit comprises a cofferdam 1, a bearing block 2, an anti-seepage water-stop 3, a drainage channel 4, a lining plate 5, a channel 6, a water passing part 6.1 and a repair foundation pit 6.2. The length of the bearing blocks is L, the width of the bearing blocks is M, and the spacing distance between the bearing blocks is N.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the invention is not limited thereto, and is given by way of example only; while the advantages of the invention will be apparent and readily appreciated by the description.
Referring to FIGS. 1-3: the cofferdam bottom pressure-bearing block structure is suitable for the unevenness and the bearing capacity of the canal lining and is positioned in a canal 6, a lining plate 5 is arranged in the canal 6,
A cofferdam 1 is arranged on the lining plate 5, the channel 6 is divided into two parts by the cofferdam 1, one side is a water passing part 6.1 arranged on the water facing side, and the other side is a repair foundation pit 6.2 arranged on the water backing side;
The bottom of the cofferdam 1 is provided with a bearing block 2, and the bearing blocks 2 are uniformly arranged along the direction from the upstream surface to the downstream surface of the bottom of the cofferdam 1; and an anti-seepage water stop 3 is arranged on the water facing side of the bottom of the cofferdam 1.
The cofferdam is characterized in that the bearing blocks 2 are formed by a plurality of strip-shaped bearing blocks 2, a drainage channel 4 is arranged between every two adjacent strip-shaped bearing blocks 2, and the width and the distance of each bearing block 2 are consistent with the length of the cofferdam 1 from the upstream surface to the downstream surface.
The bearing block 2 can be decomposed into a plurality of block-shaped bearing blocks 2, and each block-shaped bearing block 2 is provided with a water drainage groove 4.
The laying area of the pressure bearing blocks 2 is not less than three-fourths of the area of the bottom of the cofferdam 1.
The bearing block 2 is made of hard rubber materials.
By adopting the technical scheme of the invention, technical research is carried out on the repair cofferdam of the first-stage main canal channel of the central line of north-south water diversion, the main canal adopts a trapezoidal section, the thickness of the cast-in-place concrete lining board of the full section is 8 cm-10 cm, the allowable deviation of the surface flatness of the cast-in-place concrete lining board is 1 cm/2 m, and the dislocation of the surface defect is less than 1 cm.
The technical scheme comprises the following specific steps:
Firstly, uniformly arranging strip-shaped pressure bearing blocks 2 at the bottom of a cofferdam 1 along the direction from the upstream surface to the downstream surface;
Secondly, the width and the distance of the bearing blocks 2 are determined according to the bearing capacity and the unevenness of the lining plates 5, the stability of the cofferdam 1 and other factors, for example, the length of the cofferdam 1 along the direction from the upstream surface to the downstream surface is 3.4 meters, the length of the strip-shaped bearing blocks 2 is 3.4 meters, the width of the strip-shaped bearing blocks is 0.2 meter, and the distance of the strip-shaped bearing blocks is 0.1 meter;
Secondly, the pressure bearing block 2 is made of hard rubber materials or other materials which have certain strength and can adapt to certain deformation;
thirdly, the strip-shaped bearing block 2 can be decomposed into a plurality of small block-shaped bearing blocks 2 according to the requirement, for example, the strip-shaped bearing block 2 with the length of 3.4m is divided into a plurality of block-shaped bearing blocks with the length of 0.2m multiplied by 0.2m, and the distance between the blocks is 0.1 m.
The working principle of the pressure-bearing block is as follows: the unevenness of the contact surface between the cofferdam 1 made of steel and the lining plate 5 easily causes the lining plate 5 to generate obvious stress concentration and uneven stress. Because the canal lining plate 5 is made of plain concrete and has a small thickness, the canal lining plate is easy to damage due to uneven stress. The bearing blocks 2 have certain strength and certain flexibility, and can adapt to the unevenness of the lining plate through deformation to a certain degree, so that the weight of the upper structure of the lining plate 5 is uniformly distributed on the lining plate 5. Meanwhile, the bearing blocks 2 are arranged in combination with an anti-seepage structure between the cofferdam 1 and the lining plate 5, the anti-seepage water stop 3 is arranged on the water-facing side of the bottom of the cofferdam 1, and the grooves among the bearing blocks 2 can play a role in draining water to the backwater side of the cofferdam 1, so that uplift pressure is reduced, and the stability of the cofferdam 1 is facilitated.
the above-mentioned parts not described in detail are prior art.
Claims (5)
1. The cofferdam bottom pressure-bearing block structure is suitable for the unevenness and the bearing capacity of the canal lining and is positioned in a canal (6), a lining plate (5) is arranged in the canal (6),
A cofferdam (1) is arranged on the lining plate (5), the channel (6) is divided into two parts by the cofferdam (1), one side is a water passing part (6.1) arranged on the water facing side, and the other side is a repair foundation pit (6.2) arranged on the water backing side;
The method is characterized in that: the pressure-bearing blocks (2) are arranged at the bottom of the cofferdam (1), and the pressure-bearing blocks (2) are uniformly arranged along the direction from the upstream surface to the downstream surface of the bottom of the cofferdam (1); and an anti-seepage water stop (3) is arranged on the water facing side of the bottom of the cofferdam (1).
2. The cofferdam bottom pressure-bearing block structure adapting to the unevenness and the bearing capacity of the canal lining as claimed in claim 1, wherein: the cofferdam is characterized in that the bearing blocks (2) are formed by a plurality of strip-shaped bearing blocks (2), a drainage channel (4) is arranged between every two adjacent strip-shaped bearing blocks (2), and the width and the distance of each bearing block (2) are consistent with the length of the cofferdam (1) from the upstream surface to the downstream surface.
3. The cofferdam bottom pressure-bearing block structure adapting to the unevenness and the bearing capacity of the canal lining as claimed in claim 1, wherein: the bearing block (2) can be decomposed into a plurality of blocky bearing blocks (2), and each blocky bearing block (2) is provided with a drainage channel (4) between.
4. The cofferdam bottom pressure-bearing block structure adapted to the unevenness and bearing capacity of the canal lining according to claim 2 or 3, wherein: the laying area of the pressure bearing blocks (2) is not less than three-fourths of the area of the bottom of the cofferdam (1).
5. The cofferdam bottom pressure-bearing block structure adapting to the unevenness and the bearing capacity of the canal lining as claimed in claim 4, wherein: the bearing block (2) is made of hard rubber materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910739700.5A CN110565592B (en) | 2019-08-12 | 2019-08-12 | Cofferdam bottom pressure-bearing block structure adapting to channel lining unevenness and bearing capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910739700.5A CN110565592B (en) | 2019-08-12 | 2019-08-12 | Cofferdam bottom pressure-bearing block structure adapting to channel lining unevenness and bearing capacity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110565592A true CN110565592A (en) | 2019-12-13 |
| CN110565592B CN110565592B (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910739700.5A Active CN110565592B (en) | 2019-08-12 | 2019-08-12 | Cofferdam bottom pressure-bearing block structure adapting to channel lining unevenness and bearing capacity |
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| Country | Link |
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| CN (1) | CN110565592B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892691A (en) * | 2022-05-25 | 2022-08-12 | 长江勘测规划设计研究有限责任公司 | Seepage-proofing and water-stopping structure between bottom of steel box cofferdam equipment and lining plate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011219999A (en) * | 2010-04-09 | 2011-11-04 | Taisei Corp | Tunnel structure |
| US20170198451A1 (en) * | 2016-01-08 | 2017-07-13 | Powerchina Huadong Engineering Corporation Limited | Cofferdam deformation-adaptive impervious structure and construction method of composite geomembrane |
| CN107447766A (en) * | 2017-06-28 | 2017-12-08 | 湖北华舟重工应急装备股份有限公司 | It is a kind of to be suitable for domatic cofferdam device and its application method |
| CN109083174A (en) * | 2018-10-25 | 2018-12-25 | 南水北调中线干线工程建设管理局 | It is a kind of can the quickly in place and monoblock type cofferdam removed and its construction method |
| CN109629585A (en) * | 2019-01-25 | 2019-04-16 | 三峡大学 | Novel cofferdam structure and construction method under soft overburden |
| CN208830334U (en) * | 2018-09-26 | 2019-05-07 | 丛日新 | A kind of cofferdam small dike rubber bath rubber antiskid fixed structure |
| CN211421044U (en) * | 2019-08-12 | 2020-09-04 | 长江勘测规划设计研究有限责任公司 | Cofferdam bottom pressure-bearing block structure suitable for unevenness and bearing capacity of canal lining |
-
2019
- 2019-08-12 CN CN201910739700.5A patent/CN110565592B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011219999A (en) * | 2010-04-09 | 2011-11-04 | Taisei Corp | Tunnel structure |
| US20170198451A1 (en) * | 2016-01-08 | 2017-07-13 | Powerchina Huadong Engineering Corporation Limited | Cofferdam deformation-adaptive impervious structure and construction method of composite geomembrane |
| CN107447766A (en) * | 2017-06-28 | 2017-12-08 | 湖北华舟重工应急装备股份有限公司 | It is a kind of to be suitable for domatic cofferdam device and its application method |
| CN208830334U (en) * | 2018-09-26 | 2019-05-07 | 丛日新 | A kind of cofferdam small dike rubber bath rubber antiskid fixed structure |
| CN109083174A (en) * | 2018-10-25 | 2018-12-25 | 南水北调中线干线工程建设管理局 | It is a kind of can the quickly in place and monoblock type cofferdam removed and its construction method |
| CN109629585A (en) * | 2019-01-25 | 2019-04-16 | 三峡大学 | Novel cofferdam structure and construction method under soft overburden |
| CN211421044U (en) * | 2019-08-12 | 2020-09-04 | 长江勘测规划设计研究有限责任公司 | Cofferdam bottom pressure-bearing block structure suitable for unevenness and bearing capacity of canal lining |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892691A (en) * | 2022-05-25 | 2022-08-12 | 长江勘测规划设计研究有限责任公司 | Seepage-proofing and water-stopping structure between bottom of steel box cofferdam equipment and lining plate |
| CN114892691B (en) * | 2022-05-25 | 2023-10-24 | 长江勘测规划设计研究有限责任公司 | Seepage-proofing and water-stopping structure between bottom of steel box cofferdam equipment and lining plate |
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| CN110565592B (en) | 2024-02-09 |
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