CN110565645A - underwater unhooking method for throwing large-particle-size materials in river closure construction - Google Patents
underwater unhooking method for throwing large-particle-size materials in river closure construction Download PDFInfo
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- CN110565645A CN110565645A CN201910677548.2A CN201910677548A CN110565645A CN 110565645 A CN110565645 A CN 110565645A CN 201910677548 A CN201910677548 A CN 201910677548A CN 110565645 A CN110565645 A CN 110565645A
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- closure
- cylindrical pin
- underwater
- unhooking
- lifting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or 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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
- Revetment (AREA)
Abstract
The invention discloses an underwater unhooking method for throwing large-particle-size materials in river closure construction, which specifically comprises the following steps: step 1, arranging a group of lifting rings which are parallel to each other on the surface of a concrete tetrahedral; step 2, inserting a cylindrical pin into the two lifting rings, and binding a rope on the surface of the cylindrical pin; step 3, starting the truck crane, and hooking a lifting hook of the truck crane on a cylindrical pin part between the two lifting rings on the concrete tetrahedron; and 4, when the concrete tetrahedron is placed at the position required by the closure opening, loosening the lifting hook, namely when no stress relation exists between the lifting hook and the cylindrical pin, pulling the step rope until the cylindrical pin slides out from between the two lifting rings, and completing unhooking. According to the underwater unhooking method, the hoisting ring is arranged on the concrete tetrahedron and is matched with the cylindrical pin and the rope for use, and the unhooking is performed by manually pulling the rope on the closure dike platform, so that the construction period can be saved, and meanwhile, the phenomena that a large amount of closure materials are lost and closure is performed in the early days can be avoided.
Description
Technical Field
The invention belongs to the technical field of hydraulic and hydroelectric engineering construction, and particularly relates to an underwater unhooking method for throwing large-particle-size materials in river closure construction.
Background
At present, in hydropower stations and hydraulic engineering built in high mountain gorge areas and large rivers in China, in the construction period, river channels need to be cut off after diversion engineering is completed and diversion conditions are met, and in the cut-off construction, large-particle-size materials such as steel reinforcement cages and concrete tetrahedrons need to be thrown to close the closure due to the large flow velocity of a closure opening.
The investigation of the underwater unhooking method for throwing large-particle-size materials in river closure construction of the established hydraulic and hydroelectric engineering in China shows that: throwing large-particle-size materials such as a reinforcement cage, a concrete tetrahedron and the like is carried out by using a large-scale automobile crane, specifically, the concrete tetrahedron is prefabricated firstly, a lifting hook is arranged on the concrete tetrahedron, the large-particle-size materials and the large-scale automobile crane are placed on a closure embankment in advance, a lifting ring on the concrete tetrahedron is hooked by using the lifting hook of the large-scale automobile crane, then the lifting ring is placed into water at a dragon mouth, and then the lifting hook of the automobile crane is swung in the water to unhook. However, in the concrete construction, because the hook-off of the large truck crane hook and the concrete tetrahedral lifting ring are carried out underwater, the hook-off or hook-off is difficult, the flow rate of the closure is high, the loss of the closure material is also high, the closure of the closure needs to be completed by one blast to avoid the loss of the closure material in a large amount, and the hook-off or hook-off of the lifting hook of the swing truck crane in the water seriously affects the closure progress of the closure and also causes the loss of the closure material in a large amount.
Disclosure of Invention
The invention aims to provide an underwater unhooking method for throwing large-particle-size materials in river closure construction, which solves the problems that the existing unhooking mode is low in unhooking speed and not easy to unhook.
The invention adopts the technical scheme that an underwater unhooking method for throwing large-particle-size materials in river closure construction comprises the following steps:
Step 1, concrete tetrahedron pretreatment
arranging a group of lifting rings which are parallel to each other on the surface of the concrete tetrahedron for later use;
step 2, hoisting
inserting a cylindrical pin into a group of lifting rings in the step 1, and binding a rope on the surface of the cylindrical pin;
Step 3, starting the truck crane on the closure berm platform, hooking a lifting hook of the truck crane on a cylindrical pin part between two lifting rings on the concrete tetrahedron, and then moving to a closure position;
And 4, when the concrete tetrahedron is placed at the position required by the closure opening, loosening the lifting hook, namely when no stress relation exists between the lifting hook and the cylindrical pin, pulling the rope in the step 2 in the direction of the closure dike platform until the cylindrical pin slides out from between the two hanging rings, and completing unhooking.
the present invention is also characterized in that,
The section of the concrete tetrahedron in the step 1 is in an isosceles trapezoid shape, and the mass of the concrete tetrahedron is 5-30 tons.
In the step 1, the horizontal distance between the two hanging rings is 20-30cm, and the radius of each hanging ring is 20-25 cm.
In the step 2, the length of the cylindrical pin is not less than the horizontal distance between the two lifting rings;
the length of the cylindrical pin is 30-40cm,The plain round steel bar.
in the step 2, the rope is tied by cylindrical pins at any end part outside the two lifting rings;
the rope binding position can also be a position where the cylindrical pin is positioned between the two hanging rings, and the rope penetrates out of any hanging ring.
In step 3, the flow speed of the tap is 5-10m/s, and the cut-off flow is 100-2000m3/s。
the invention has the beneficial effects that: the underwater unhooking method for throwing the materials with large particle sizes in river closure construction is characterized in that the concrete tetrahedron is provided with the hanging ring, the hanging ring is matched with the cylindrical pin and the rope for use, and the unhooking is carried out by manually pulling the rope on the closure dike platform, so that the construction period can be saved, the closure materials can be prevented from being greatly lost, closure can be carried out in the early days, and the underwater unhooking method has remarkable economic benefit and high practical value.
Drawings
FIG. 1 is a schematic structural diagram of a concrete tetrahedron in an underwater unhooking method for throwing large-particle-size materials in river closure construction according to the invention;
FIG. 2 is a schematic diagram of the construction of the invention during hoisting in an underwater unhooking method for throwing large-particle-size materials in river closure construction;
FIG. 3 is a schematic diagram of an engineering process for placing a concrete tetrahedron at a closure gap in an underwater unhooking method for casting a large-particle-size material in river closure construction according to the present invention;
fig. 4 is a schematic view of an engineering process of unhooking in an underwater unhooking method for throwing large-particle-size materials in river closure construction according to the present invention.
In the figure, 1 is a concrete tetrahedron, 2 is a cylindrical pin, 3 is a rope, 4 is a truck crane, 5 is a keel, 6 is a hanging ring, 7 is a lifting hook, and 8 is a closure dike platform.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
the invention relates to an underwater unhooking method for throwing large-particle-size materials in river closure construction, which comprises the following steps of:
Step 1, pretreatment of concrete tetrahedron 1
Arranging a group of lifting rings 6 which are parallel to each other on the surface of the concrete tetrahedron 1 for later use; as shown in figure 1, the section of the concrete tetrahedron 1 is isosceles trapezoid, and the mass of the concrete tetrahedron is 5-30 tons. The concrete tetrahedron 1 acts as a retention material in order to block the closure gap 5.
the horizontal distance between the two hanging rings 6 is 20-30cm, and the radius of each hanging ring 6 is 20-25 cm. The hanging ring 6 is used for clamping the cylindrical pin 2 and is convenient for lifting the concrete tetrahedron 1.
Step 2, hoisting
inserting a cylindrical pin 2 into a group of lifting rings 6 in the step 1, and binding a rope 3 on the surface of the cylindrical pin 2; the binding position of the rope 3 is that the cylindrical pin 2 is positioned at any end part outside the two lifting rings 6; the binding position of the rope 3 can also be the position where the cylindrical pin 2 is positioned between the two hanging rings 6, and the rope penetrates out from any one hanging ring 6. In the two binding modes, the free ends of the ropes 3 face the cut-off hip platform 8.
The length of the cylindrical pin 2 is not less than the horizontal distance between the two lifting rings 6; the length of the cylindrical pin 2 is 30-40cm,The plain round steel bar.
Step 3, as shown in fig. 2, starting the truck crane 4 on the closure dike platform 8, hooking a lifting hook 7 of the truck crane 4 on the cylindrical pin 2 part between the two lifting rings 6 on the concrete tetrahedron 1, and then moving to the position of the closure 5; wherein the flow rate of the closure mouth 5 is 5-10m/s, and the cut-off flow is 100-2000m3/s。
And 4, as shown in fig. 3, when the concrete tetrahedron 1 is placed at a position required by the closure 5, loosening the lifting hook 7, namely when no stress relation exists between the lifting hook 7 and the cylindrical pin 2, as shown in fig. 4, pulling the rope 3 in the step 2 in the direction of the cut-off hip platform 8 until the cylindrical pin 2 slides out from between the two hanging rings 6, and unhooking is completed.
According to the underwater unhooking method, the hoisting rings are arranged on the concrete tetrahedron and are matched with the cylindrical pin and the rope for use, and the unhooking is performed by manually pulling the rope on the closure dike platform, so that the construction period can be saved, the large loss of closure materials and closure in the early days can be avoided, and the underwater unhooking method has remarkable economic benefit and high practical value.
Claims (6)
1. An underwater unhooking method for throwing large-particle-size materials in river closure construction is characterized by comprising the following steps of:
Step 1, pretreating concrete tetrahedron (1)
Arranging a group of lifting rings (6) which are parallel to each other on the surface of the concrete tetrahedron (1) for later use;
Step 2, hoisting
Inserting a cylindrical pin (2) into the lifting rings (6) in the step (1), and binding a rope (3) on the surface of the cylindrical pin (2);
Step 3, starting a truck crane (4) on the closure dike platform (8), hooking a lifting hook (7) of the truck crane (4) on the cylindrical pin (2) part between the two lifting rings (6) on the concrete tetrahedron (1), and then moving to the position of the closure opening (5);
And 4, when the concrete tetrahedron (1) is placed at the position required by the closure opening (5), loosening the lifting hook (7), namely when no stress relation exists between the lifting hook (7) and the cylindrical pin (2), pulling the rope (3) in the step 2 in the direction of the closure dike platform (8) until the cylindrical pin (2) slides out from between the two lifting rings (6), and completing unhooking.
2. The underwater unhooking method for throwing the large-particle-size materials in river closure construction according to claim 1, wherein the section of the concrete tetrahedron (1) in the step 1 is an isosceles trapezoid, and the mass of the concrete tetrahedron is 5-30 tons.
3. The underwater unhooking method for throwing the large-particle-size materials in river course intercepting construction according to claim 1, wherein the horizontal distance between the two lifting rings (6) in the step 1 is 20-30cm, and the radius of each lifting ring (6) is 20-25 cm.
4. The underwater unhooking method for throwing the large-particle-size materials in river course intercepting construction according to claim 1, wherein the length of the cylindrical pin (2) in the step 2 is not less than the horizontal distance between the two lifting rings (6);
the length of the cylindrical pin (2) is 30-40cm,The plain round steel bar.
5. The underwater unhooking method for throwing the large-particle-size materials in river closure construction according to any one of claims 1 to 4, wherein the binding position of the rope (3) in the step 2 is that the cylindrical pin (2) is positioned at any end part outside the two lifting rings (6);
the binding position of the rope (3) can also be the position of the cylindrical pin (2) between the two hanging rings (6), and the rope penetrates out of any one hanging ring (6).
6. The underwater unhooking method for throwing large-particle-size materials in river closure construction according to claim 1, wherein in the step 3, the flow velocity of the closure (5) is 5-10m/s, and the closure flow is 100-2000m3/s。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910677548.2A CN110565645A (en) | 2019-07-25 | 2019-07-25 | underwater unhooking method for throwing large-particle-size materials in river closure construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910677548.2A CN110565645A (en) | 2019-07-25 | 2019-07-25 | underwater unhooking method for throwing large-particle-size materials in river closure construction |
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|---|---|
| CN110565645A true CN110565645A (en) | 2019-12-13 |
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| CN201910677548.2A Pending CN110565645A (en) | 2019-07-25 | 2019-07-25 | underwater unhooking method for throwing large-particle-size materials in river closure construction |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001019346A (en) * | 1999-07-12 | 2001-01-23 | Bunka Seiko:Kk | Anchor metal for lifting platelike body |
| CN1436899A (en) * | 2003-03-12 | 2003-08-20 | 武汉大学 | Method of preventing cut-off material from being washed away |
| JP3974719B2 (en) * | 1998-11-27 | 2007-09-12 | 大成ロテック株式会社 | Asphalt mat slanting apparatus and method |
| CN203048396U (en) * | 2012-12-29 | 2013-07-10 | 广西建工集团第三建筑工程有限责任公司 | Novel automatic shackle special for hoisting |
| CN203144966U (en) * | 2013-04-17 | 2013-08-21 | 中国葛洲坝集团股份有限公司 | Precast concrete for closure casting |
| CN204737574U (en) * | 2015-06-03 | 2015-11-04 | 武汉二航路桥特种工程有限责任公司 | Automatic unhooking device under water who fills out is thrown in pier protection |
| US9726255B1 (en) * | 2016-04-25 | 2017-08-08 | Patrick M Tarrant | Shackle with self centering closure cross member |
| CN207346985U (en) * | 2017-10-30 | 2018-05-11 | 中国电建集团港航建设有限公司 | A kind of concrete prefabricated boom hoisting |
-
2019
- 2019-07-25 CN CN201910677548.2A patent/CN110565645A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3974719B2 (en) * | 1998-11-27 | 2007-09-12 | 大成ロテック株式会社 | Asphalt mat slanting apparatus and method |
| JP2001019346A (en) * | 1999-07-12 | 2001-01-23 | Bunka Seiko:Kk | Anchor metal for lifting platelike body |
| CN1436899A (en) * | 2003-03-12 | 2003-08-20 | 武汉大学 | Method of preventing cut-off material from being washed away |
| CN203048396U (en) * | 2012-12-29 | 2013-07-10 | 广西建工集团第三建筑工程有限责任公司 | Novel automatic shackle special for hoisting |
| CN203144966U (en) * | 2013-04-17 | 2013-08-21 | 中国葛洲坝集团股份有限公司 | Precast concrete for closure casting |
| CN204737574U (en) * | 2015-06-03 | 2015-11-04 | 武汉二航路桥特种工程有限责任公司 | Automatic unhooking device under water who fills out is thrown in pier protection |
| US9726255B1 (en) * | 2016-04-25 | 2017-08-08 | Patrick M Tarrant | Shackle with self centering closure cross member |
| CN207346985U (en) * | 2017-10-30 | 2018-05-11 | 中国电建集团港航建设有限公司 | A kind of concrete prefabricated boom hoisting |
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Application publication date: 20191213 |