CN110565592B - Cofferdam bottom pressure-bearing block structure adapting to channel lining unevenness and bearing capacity - Google Patents
Cofferdam bottom pressure-bearing block structure adapting to channel lining unevenness and bearing capacity Download PDFInfo
- Publication number
- CN110565592B CN110565592B CN201910739700.5A CN201910739700A CN110565592B CN 110565592 B CN110565592 B CN 110565592B CN 201910739700 A CN201910739700 A CN 201910739700A CN 110565592 B CN110565592 B CN 110565592B
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- cofferdam
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- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229920001875 Ebonite Polymers 0.000 claims 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
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Revetment (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a cofferdam bottom pressure block structure adapting to the unevenness and bearing capacity of a canal lining, wherein a pressure block (2) is arranged at the bottom of a cofferdam (1), and the pressure blocks (2) are uniformly arranged along the direction from the upstream surface to the downstream surface of the bottom of the cofferdam (1); the water-facing side of the bottom of the cofferdam (1) is provided with an anti-seepage water stop (3). The cofferdam overcomes the defects that a cofferdam falls on an uneven lining board and is not tightly combined in the prior art, has a certain deformability of a pressure-bearing block, can adapt to local dislocation, protrusion and the like of the lining board, and does not cause local stress concentration to damage the lining board.
Description
Technical Field
The invention relates to the technical field of construction diversion of water conservancy and hydropower engineering, in particular to a cofferdam bottom pressure block structure which is suitable for the unevenness and bearing capacity of canal lining.
Background
The water delivery channel of the water transfer project is affected by various factors such as channel water level change, running condition of a drainage system, freezing and thawing, construction quality and the like, and damages in the forms of cracking, collapsing, floating and instability resistance and the like of the concrete lining plate can possibly occur, so that the safe operation of the channel is affected. When the channel is repaired under the condition of not interrupting the water delivery of the channel, a cofferdam is adopted to form a dry foundation pit. In order to avoid damaging the concrete structure of the channel and polluting water quality, the cofferdam adopts a steel structure or a concrete structure.
The steel plate or the concrete bottom plate at the bottom of the conventional cofferdam is in direct contact 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 easy to destabilize; when the lining board has local dislocation and protrusion, the pressure at the bottom of the cofferdam is concentrated at the dislocation and protrusion parts, and the bearing capacity of the lining board can be exceeded, so that the lining board is damaged.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provide a cofferdam bottom bearing block structure which is suitable for the unevenness and bearing capacity of canal lining.
The invention is implemented by the following technical scheme: a cofferdam bottom bearing block structure adapting to the unevenness and bearing capacity of the canal lining; it is located in the channel, the said channel is equipped with the lining board.
A cofferdam is arranged on the lining board, the cofferdam divides the channel into two parts, one side is a water passing part arranged on the water facing side, and the other side is a repairing foundation pit arranged on the water backing side;
the bottom of the cofferdam is provided with pressure blocks which are uniformly arranged along the direction from the upstream surface to the downstream surface of the bottom of the cofferdam; the water facing side of the bottom of the cofferdam is provided with seepage prevention water stop.
In the technical scheme, the method comprises the following steps: the cofferdam comprises a cofferdam body, a plurality of water draining grooves are formed between the cofferdam body and the cofferdam body, each water draining groove is arranged between the two adjacent water draining grooves, and the width and the distance between the water draining grooves are consistent with the length between the water draining surface and the water draining surface.
In the technical scheme, the method comprises the following steps: the pressure bearing blocks can be decomposed into a plurality of block-shaped pressure bearing blocks, and a drainage groove is formed between each block-shaped pressure bearing block.
In the technical scheme, the method comprises the following steps: the paving area of the pressure bearing blocks is not smaller than the area of the bottom of the cofferdam.
In the technical scheme, the method comprises the following steps: the pressure-bearing block is made of hard rubber materials.
The invention has the following advantages: (1) according to the invention, the pressure bearing blocks are distributed at intervals at the bottom of the cofferdam, and the characteristics of transverse extension caused by the pressure of rubber are utilized, so that the pressure bearing blocks are easier to transversely extend and more easily compressed, the deformation of the pressure bearing blocks is facilitated to adapt to the unevenness of the canal lining plate, and the cofferdam is stably located on the lining plate.
(2) The area of the pressure bearing block can reach 3/4 or even more of the area of the bottom of the cofferdam, and the sufficient contact area with the lining plate can be ensured, so that the pressure of the cofferdam can meet the bearing capacity of the lining plate.
(3) The bearing block is made of hard rubber materials, has larger friction coefficient with the concrete lining plate, and provides enough friction force on enough contact surface so as to meet the requirement of cofferdam stability.
(4) The pressure-bearing block has certain deformability, can adapt to local dislocation, protrusion and the like of the lining plate, and cannot cause local stress concentration to damage the lining plate.
(5) The invention combines the anti-seepage structure arrangement between the cofferdam and the lining board, the water seepage prevention water is arranged on the water facing side of the bottom of the cofferdam, and the grooves between the bearing blocks can play a role in draining water to the water carrying side of the cofferdam, reduce the lifting force and be beneficial to the stability of the cofferdam.
(6) The cofferdam adopting the technical scheme can repair channels under the condition of not interrupting water supply, and has great social and economic benefits. For example, in the south-to-north central line one-term engineering, after the central line main canal is put into operation, the water supply tasks of living and industrial production for residents in large and medium cities such as Beijing, tianjin and the like are carried out, and once the water supply is interrupted, the influence is wide and the caused social influence is large.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a top view of the present invention.
FIG. 3 is a view showing the arrangement of the bearing blocks at the bottom of the cofferdam in the present invention.
Fig. 4 is a cross-sectional view of the present invention.
In the figure: cofferdam 1, pressure-bearing block 2, seepage-proofing water stop 3, water drainage tank 4, lining board 5, channel 6, water passing part 6.1 and repairing foundation pit 6.2. The length of the pressure-bearing blocks is L, the width of the pressure-bearing blocks is M, and the interval distance between the pressure-bearing blocks is N.
Detailed Description
The following detailed description of the invention, taken in conjunction with the accompanying drawings, is not intended to limit the invention, but is made merely by way of example; while the advantages of the invention will become apparent and readily appreciated by reference to the following description.
Referring to fig. 1-4: the cofferdam bottom pressure-bearing block structure adapting to the unevenness and bearing capacity of canal lining is positioned in a canal 6, a lining board 5 is arranged in the canal 6,
a cofferdam 1 is arranged on the lining board 5, the cofferdam 1 divides the channel 6 into two parts, one side is a water passing part 6.1 arranged on the water facing side, and the other side is a repairing foundation pit 6.2 arranged on the water backing side;
the bottom of the cofferdam 1 is provided with a pressure block 2, and the pressure block 2 is uniformly arranged along the direction from the upstream surface to the downstream surface of the bottom of the cofferdam 1; the water-facing side of the bottom of the cofferdam 1 is provided with an anti-seepage water stop 3.
The pressure bearing blocks 2 are formed by a plurality of strip-shaped pressure bearing blocks 2, drainage grooves 4 are formed between the adjacent strip-shaped pressure bearing blocks 2, and the width and the distance between each pressure bearing block 2 are consistent with the length of the cofferdam 1 from the upstream surface to the downstream surface.
The pressure-bearing blocks 2 can be decomposed into a plurality of block-shaped pressure-bearing blocks 2, and a drainage groove 4 is arranged between each block-shaped pressure-bearing block 2.
The paving area of the pressure-bearing blocks 2 is not smaller than the bottom area of the cofferdam 1 of three quarters.
The pressure-bearing block 2 is made of hard rubber materials.
By adopting the technical scheme, the technical research is carried out on the main canal repairing cofferdam in the first-stage of the south-to-north-transfer central line, the main canal adopts a trapezoid section, the thickness of the cast-in-place concrete lining with the full section is 8 cm-10 cm, the allowable deviation of the surface flatness is 1 cm/2 m, and the surface defect dislocation is less than 1 cm.
The specific method of the technical scheme is as follows:
(1) uniformly arranging strip-shaped pressure-bearing blocks 2 at the bottom of the cofferdam 1 along the direction from the upstream surface to the downstream surface;
(2) the width and the interval of the pressure-bearing blocks 2 are determined according to factors such as the bearing capacity, the unevenness of the lining plates 5, the stability of the cofferdam 1 and the like, for example, the cofferdam 1 is 3.4 meters long along the direction from the upstream surface to the downstream surface, and the strip-shaped pressure-bearing blocks 2 are 3.4 meters long, 0.2 meter wide and 0.1 meter apart;
(2) the pressure-bearing block 2 is made of hard rubber material or other materials with certain strength and capable of adapting to certain deformation;
(3) the strip-shaped pressure bearing blocks 2 can be decomposed into a plurality of small block-shaped pressure bearing blocks 2 according to the requirement, for example, the strip-shaped pressure bearing blocks 2 with the length of 3.4m are divided into a plurality of blocks with the length of 0.2m multiplied by 0.2m, and the space between the blocks is 0.1m.
The working principle of the pressure block is as follows: uneven contact surfaces of the cofferdam 1 and the lining plate 5 made of steel easily cause the lining plate 5 to generate more obvious stress concentration and uneven stress. Because the canal lining plate 5 is plain concrete, the thickness is thinner, and the canal lining plate is easier to damage due to uneven stress. The pressure-bearing block 2 has certain strength and certain flexibility, and can adapt to the unevenness of the lining plate through deformation to a certain extent, so that the weight of the upper structure of the lining plate 5 is uniformly distributed on the lining plate 5. Meanwhile, the pressure bearing blocks 2 are combined with the 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, the grooves between the pressure bearing blocks 2 can play a role in draining water to the water backing side of the cofferdam 1, the lifting force is reduced, and the stability of the cofferdam 1 is facilitated.
The parts not described in detail above are all prior art.
Claims (3)
1. The cofferdam bottom pressure-bearing block structure adapting to the unevenness and bearing capacity of canal lining is positioned in a canal (6), a lining board (5) is arranged in the canal (6),
a cofferdam (1) is arranged on the lining board (5), the cofferdam (1) divides the channel (6) into two parts, one side is a water passing part (6.1) arranged on the water facing side, and the other side is a repairing foundation pit (6.2) arranged on the water backing side;
the method is characterized in that: the bottom of the cofferdam (1) is provided with a pressure block (2), and the pressure block (2) is uniformly arranged along the direction from the upstream surface to the downstream surface of the bottom of the cofferdam (1); the water-facing side of the bottom of the cofferdam (1) is provided with an anti-seepage water stop (3);
the water draining device is characterized in that each pressure bearing block (2) is formed by a plurality of strip-shaped pressure bearing blocks (2), a drainage groove (4) is formed between every two adjacent strip-shaped pressure bearing blocks (2), and the width and the interval of each pressure bearing block (2) are consistent with the length of the cofferdam (1) from the upstream surface to the downstream surface;
the pressure bearing blocks (2) can be decomposed into a plurality of block-shaped pressure bearing blocks (2), and a drainage groove (4) is formed between each block-shaped pressure bearing block (2);
the width and the distance of the pressure-bearing blocks (2) are determined according to the bearing capacity, the unevenness of the lining plates (5) and the stability factors of the cofferdam (1).
2. The cofferdam bottom pressure block structure for adapting to the unevenness and the bearing capacity of the canal lining according to claim 1, wherein: the paving area of the pressure-bearing block (2) is not smaller than the bottom area of the cofferdam (1) of three fourths.
3. The cofferdam bottom pressure block structure for adapting to the unevenness and the bearing capacity of the canal lining according to claim 2, wherein: the pressure-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 |
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| Publication Number | Publication Date |
|---|---|
| CN110565592A CN110565592A (en) | 2019-12-13 |
| CN110565592B true CN110565592B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011219999A (en) * | 2010-04-09 | 2011-11-04 | Taisei Corp | Tunnel structure |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464048B (en) * | 2016-01-08 | 2017-07-28 | 中国电建集团华东勘测设计研究院有限公司 | The impermeable composite geomembrane structure and construction method of weir body deformation can be adapted to automatically |
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2019
- 2019-08-12 CN CN201910739700.5A patent/CN110565592B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011219999A (en) * | 2010-04-09 | 2011-11-04 | Taisei Corp | Tunnel structure |
| 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 |
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| CN110565592A (en) | 2019-12-13 |
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