CN111764418B - Steel cofferdam positioning system in deep water - Google Patents
Steel cofferdam positioning system in deep water Download PDFInfo
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- CN111764418B CN111764418B CN202010733895.5A CN202010733895A CN111764418B CN 111764418 B CN111764418 B CN 111764418B CN 202010733895 A CN202010733895 A CN 202010733895A CN 111764418 B CN111764418 B CN 111764418B
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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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Abstract
本申请公开了一种深水中的钢围堰定位系统。该系统包括：第一定位模块，连接在钢围堰的前侧，且固定在靠近深水的上游的位置；第二定位模块，连接在所述钢围堰的后侧，且固定在靠近深水的下游的位置；导向模块，连接在所述钢围堰的左侧或右侧，且固定在靠近深水的两岸的位置；通过所述第一定位模块、所述第二定位模块和所述导向模块的配合，定位所述钢围堰。本申请解决了无底钢围堰在深水中无法定位的技术问题。
The present application discloses a steel cofferdam positioning system in deep water. The system comprises: a first positioning module, connected to the front side of the steel cofferdam and fixed at a position close to the upstream of the deep water; a second positioning module, connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water; a guide module, connected to the left or right side of the steel cofferdam and fixed at a position close to both sides of the deep water; the steel cofferdam is positioned by the cooperation of the first positioning module, the second positioning module and the guide module. The present application solves the technical problem that a bottomless steel cofferdam cannot be positioned in deep water.
Description
Technical Field
The application relates to the field of bridge engineering, in particular to a steel cofferdam positioning system in deep water.
Background
In recent years, along with the continuous development of economic construction of China, bridges crossing large rivers are more and more, cofferdam technology applied to bridge foundation construction is also greatly developed and improved, and the double-wall steel cofferdam is widely applied as a water enclosing structure for bridge deepwater foundation construction.
The key construction technologies of the double-wall steel cofferdam, such as adjustment, positioning, bottom sealing and the like, have great differences under different hydrologic and geological conditions. When the construction environment of the foundation is deep water, the problems of exposed bedrock, large rock surface fluctuation, deep water level and large flow velocity exist, and the foundation can only be constructed by selecting to firstly lower the bottomless steel cofferdam, anchoring the steel casing footing by using the bottom sealing concrete, and then erecting a drilling platform.
However, the positioning of the bottomless steel cofferdam after being lowered to the position before foundation pile construction is still a difficult problem because the cofferdam is easy to slip as the cofferdam is influenced by water flow, wind direction and tide, and because the rock face inclination angle is large, the high and low blade steel cofferdam back cover concrete construction generates large lateral pressure, and the cofferdam is easy to slide.
Aiming at the problem that the bottomless steel cofferdam in the related art cannot be positioned in deep water, no effective solution is proposed at present.
Disclosure of Invention
The application mainly aims to provide a steel cofferdam positioning system in deep water, which aims to solve the problem that a bottomless steel cofferdam cannot be positioned in deep water.
In order to achieve the above object, according to one aspect of the present application, there is provided a steel cofferdam positioning system in deep water.
The steel cofferdam positioning system in deep water comprises a first positioning module, a second positioning module, a guide module and a positioning module, wherein the first positioning module is connected to the front side of a steel cofferdam and fixed at a position close to the upstream of deep water, the second positioning module is connected to the rear side of the steel cofferdam and fixed at a position close to the downstream of the deep water, the guide module is connected to the left side or the right side of the steel cofferdam and fixed at a position close to two sides of the deep water, and the steel cofferdam is positioned through the cooperation of the first positioning module, the second positioning module and the guide module.
Further, the steel cofferdam is a bottomless steel sleeve box placed on a deep river bed.
Further, the first positioning module comprises four first anchors fixed at positions close to the upstream of deep water, a first anchor chain connected with the first anchors, and a first steel wire rope, wherein one end of the first steel wire rope is connected with the first anchor chain, and the other end of the first steel wire rope is connected with the front side of the steel cofferdam.
Further, the first positioning module comprises four first anchors fixed at positions close to the upstream of deep water, a first anchor chain connected with the first anchors, a first steel wire rope, one end of the first steel wire rope is connected with the first anchor chain, one side of the first sub-positioning module is connected with the other end of the first steel wire rope, and the other side of the first sub-positioning module is connected with the front side of the steel cofferdam.
Further, the second positioning module comprises two second anchors fixed at the position close to the downstream of the deep water, a second anchor chain connected with the second anchors, and a first steel wire rope, one end of which is connected with the first anchor chain, and the other end of which is connected with the rear side of the steel cofferdam.
Further, the second positioning module comprises two second anchors fixed at the position close to the downstream of deep water, a second anchor chain connected with the second anchors, a second steel wire rope, one end of which is connected with the second anchor chain, and a second sub-positioning module, one side of which is connected with the other end of the second steel wire rope, and the other side of which is connected with the rear side of the steel cofferdam.
Further, the guide module comprises four third anchors, a third anchor chain and a third steel wire rope, wherein the two third anchors are arranged at positions close to the left bank, the other two third anchors are arranged at positions close to the right bank, the third anchor chain is connected with the third anchors, one end of the third steel wire rope is connected with the third anchor chain, and the other end of the third steel wire rope is connected with the left side or the right side of the steel cofferdam.
The guiding module comprises four third anchors, a third anchor chain, a third steel wire rope and a guiding ship, wherein the four third anchors are arranged at positions close to the left bank, the other two third anchors are arranged at positions close to the right bank, the third anchor chain is connected with the third anchors, one end of the third steel wire rope is connected with the third anchor chain, and the guiding ship is connected with the other end of the third steel wire rope and is connected with the left side or the right side of the steel cofferdam.
Further, the first sub-positioning module comprises four fourth anchors, a fourth anchor chain, a fourth steel wire rope and a first positioning ship, wherein the four fourth anchors are arranged at positions close to the left bank, the other two fourth anchors are arranged at positions close to the right bank, the fourth anchor chain is connected with the fourth anchors, one end of the fourth steel wire rope is connected with the fourth anchor chain, the first positioning ship is connected with the other end of the fourth steel wire rope, and the first positioning ship is connected with the front side of the steel cofferdam through a first pull rope.
Further, the second sub-positioning module comprises four fifth anchors, a fifth anchor chain, a fifth steel wire rope and a second positioning ship, wherein the four fifth anchors are arranged at positions close to the left bank, the other two fifth anchors are arranged at positions close to the right bank, the fifth anchor chain is connected with the fifth anchors, one end of the fifth steel wire rope is connected with the fifth anchor chain, the second positioning ship is connected with the other end of the fifth steel wire rope, and the second positioning ship is connected with the rear side of the steel cofferdam through a second pull rope.
The embodiment of the application adopts an anchoring positioning mode, is connected to the front side of the steel cofferdam through a first positioning module and is fixed at a position close to the upstream of deep water, a second positioning module is connected to the rear side of the steel cofferdam and is fixed at a position close to the downstream of the deep water, a guide module is connected to the left side or the right side of the steel cofferdam and is fixed at a position close to two sides of the deep water, and the steel cofferdam is positioned through the cooperation of the first positioning module, the second positioning module and the guide module, so that the aim of eliminating adverse influence of various factors to enable the steel cofferdam not to easily slide is achieved, the technical effect that the bottomless steel cofferdam can be effectively positioned in the deep water with no coverage of a rock surface, large dip angle, water urgency and wind is achieved, and the technical problem that the bottomless steel cofferdam cannot be positioned in the deep water is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:
FIG. 1 is a top view of a steel cofferdam locating system in accordance with an embodiment of the present application;
FIG. 2 is an elevation view of a steel cofferdam locating system in accordance with an embodiment of the present application;
FIG. 3 is a top view of a first positioning boat according to an embodiment of the present application;
Fig. 4 is a top view of a second positioning boat according to an embodiment of the present application.
Reference numerals
10. A first positioning module; 20, a second positioning module, 30, a guiding module, 40, a steel cofferdam, 101, a first anchor, 102, a first anchor chain, 103, a first wire rope, 104, a first sub-positioning module, 201, a second anchor, 202, a second anchor chain, 203, a second wire rope, 204, a second sub-positioning module, 301, a third anchor, 302, a third anchor chain, 303, a third wire rope, 304, a guiding ship, 1041, a fourth anchor, 1042, a fourth anchor chain, 1043, a fourth wire rope, 1044, a first positioning ship, 2041, a fifth anchor, 2042, a fifth anchor chain, 2043, a fifth wire rope, 2044, a second positioning ship.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, they may be fixedly connected, detachably connected, or of unitary construction, they may be mechanically or electrically connected, they may be directly connected, or they may be indirectly connected through intermediaries, or they may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 4, the present application relates to a steel cofferdam 40 positioning system in deep water, which comprises a first positioning module 10 connected to the front side of the steel cofferdam 40 and fixed at a position near the upstream of the deep water, a second positioning module 20 connected to the rear side of the steel cofferdam 40 and fixed at a position near the downstream of the deep water, a guiding module 30 connected to the left side or right side of the steel cofferdam 40 and fixed at a position near both sides of the deep water, and positioning the steel cofferdam 40 by the cooperation of the first positioning module 10, the second positioning module 20 and the guiding module 30.
The conditions of deep water, high water level, high flow speed, high water surface wind speed, uncovered water bottom rock surface and high water bottom rock surface inclination angle exist in deep water, and the steel cofferdam 40 is inevitably easy to slip when being arranged in deep water, namely, the steel cofferdam 40 cannot be positioned at a preset position, so that bridge piers cannot be arranged in deep water in bridge engineering construction, and only expensive suspension bridges can be adopted.
In order to reduce the cost, the problem that the bridge pier cannot be arranged in the deep water must be solved, that is, the bridge pier is required to be arranged at the preset position in the deep water, and at this time, factors that the steel cofferdam 40 slides due to deep water level, high flow velocity, high water surface wind speed, uncovered underwater rock surface and large underwater rock surface inclination angle must be considered.
In this embodiment, the first positioning module 10 is used by being attached to the front side of the steel cofferdam 40 and fixed at a position near the upstream of the deepwater. The first positioning module 10 has water flow resistance and wind resistance in the forward water flow direction, and is a main structure for ensuring safety and stability of the steel cofferdam 40.
In this embodiment, the first positioning module 10 preferably includes four first anchors 101 fixed at positions near the upstream of the deepwater, a first anchor chain 102 connected to the first anchors 101, and a first wire rope 103 having one end connected to the first anchor chain 102 and the other end connected to the front side of the steel cofferdam 40.
The first anchor 101 is a 150t frog type concrete anchor, the anchoring position is about 600m away from the steel cofferdam 40, the first anchor 101 is fixed by adopting a first anchor chain 102, the front side of the steel cofferdam 40 is connected with the first anchor chain 102 by adopting a first steel wire rope 103, so that the force generated by water flow and wind and the sideslip force generated by a large inclination angle can be prevented, and the steel cofferdam 40 is driven to slide in the water flow direction.
Since the steel cofferdam is arranged at a position close to the upstream in deep water, the force generated by water flow flowing from the upstream to the downstream is necessarily born, and therefore, the first anchors 101, preferably four first anchors 101, are required to be arranged, so that the steel cofferdam 40 slides in the water flow direction after the combination of a plurality of forces is effectively avoided.
In this embodiment, a second positioning module 20 is also used, which is connected to the rear side of the steel cofferdam 40 and is fixed in a position close to the downstream of the deepwater. The second positioning module 20 mainly has the function of resisting the influence of tide and provides a certain counter-pulling force for the steel cofferdam 40 so as to ensure the stability of the positioning system in the water flow direction.
In this embodiment, the second positioning module 20 preferably includes two second anchors 201 fixed at positions near the downstream of the deepwater, a second anchor chain 202 connected to the second anchors 201, and a first wire 103 connected to the first anchor chain 102 at one end and to the rear side of the steel cofferdam 40 at the other end.
The second anchor 201 is a 150t frog type concrete anchor, the anchoring position is about 600m away from the steel cofferdam 40, the second anchor 201 is fixed by adopting a second anchor chain 202, the front side of the steel cofferdam 40 is connected with the second anchor chain 202 by adopting a second steel wire rope 203, so that the force of moisture-bearing water, the force generated by wind and the sideslip force generated by a large inclination angle can be prevented, and the steel cofferdam 40 is driven to slide in the reverse water flow direction.
Since the steel cofferdam is arranged at a position close to the downstream of the deep water, the force generated by the water flow flowing from the upstream to the downstream does not need to be borne, and therefore, the force and sideslip force generated by tidal water and wind can be effectively avoided by only arranging two second anchors 201, so that the steel cofferdam 40 slides in the reverse water flow direction.
By the cooperation of the first positioning module 10 and the second positioning module 20, positioning in the horizontal direction is achieved.
In this embodiment, a guide module 30 is also used, which is connected to the left or right side of the steel cofferdam 40 and is fixed at a position near both sides of the deep water. The guide module 30 has the function of adjusting and controlling the position of the steel cofferdam 40 in the direction perpendicular to the water flow, and is subjected to the lateral water flow resistance and wind force.
In this embodiment, it is preferable that the guiding module 30 includes four third anchors 301, two third anchors 301 being disposed near the left side, and the other two third anchors 301 being disposed near the right side, a third anchor chain 302 connected to the third anchors 301, and a third wire rope 303 having one end connected to the third anchor chain 302 and the other end connected to the left side or the right side of the steel cofferdam 40.
The third anchor 301 close to the left bank is a 40t concrete anchor, the concrete anchor is directly cast in an open pit manner, the third anchor 301 close to the right bank is a 75t frog concrete anchor which is about 200m away from the center of the steel cofferdam 40, the third anchor 301 is fixed by a third anchor chain 302, and the front side of the steel cofferdam 40 is connected with the second anchor chain 202 by a third steel wire rope 303, so that the steel cofferdam 40 is prevented from sliding in the vertical direction due to side-stream resistance, wind force and sideslip force generated by a large inclination angle.
Because the steel cofferdam is arranged at the position of the deep water close to two banks, the force generated by the water flow flowing from the upstream to the downstream does not need to be born, and therefore, the lateral water flow resistance, wind force and sideslip force can be effectively avoided by arranging two third anchors 301 on one side, so that the steel cofferdam 40 slides in the vertical direction.
Through the cooperation of the first positioning module 10, the second positioning module 20 and the guiding module 30, the positioning in the horizontal and vertical directions is realized, namely the omnibearing positioning of the steel cofferdam 40 is realized.
The positioning system has the advantages of being wide in application range, capable of being used in deep water foundation construction environments of large dip angles and bare rock surfaces of rivers, yangtze river, lakes and the like, thoroughly eliminating influences of deep water flow, wind direction, tidal water, large dip angle rock surfaces and uncovered rock surfaces, capable of accurately positioning the steel cofferdam 40, further capable of setting bridge piers in deep water, capable of replacing expensive suspension bridges through more economical structural types, greatly reducing comprehensive construction cost, free of blasting operation, free of influencing main channel passage, safe, environment-friendly and high in construction speed.
In this embodiment, the steel cofferdam 40 is preferably a bottomless steel casing box placed on a deep water riverbed. The steel sleeve box is made of Q235a grade steel and consists of an inner surrounding wall, a peripheral wall, cutting edges, a horizontal circumferential stiffening plate, a vertical steel box, an inner surrounding wall stiffening rib, lifting lugs, an inner support, anchor piles, an accessory structure and the like.
The sleeve box is provided with 5 layers of supports, wherein the upper 4 layers of supports adopt a steel pipe truss structure, and vertical connecting steel pipes are arranged. The inner support of the last layer takes the form of a constituent space truss.
The steel sleeve box is provided with 14 steel boxes in total, the steel boxes consist of steel box wall plates, vertical stiffening plates and annular stiffening plates, the steel boxes are used as compartments of the steel sleeve box and are divided into 14 independent cabin bodies in total, and the functions of pouring concrete in the pressure cabin, water injection leveling and the like are achieved. And the anchor piles are arranged at the positions of the steel boxes, so that the functions of enhancing the whole anti-slip and anti-floating effects of the steel sleeve box are achieved.
The anchor is directly connected with the steel cofferdam 40, so that the steel cofferdam 40 can be positioned, and the technical effects are achieved, but in actual operation, the anchor is very inconvenient to break down and receive, the construction efficiency is extremely low, the anchor is required to be manually broken down to a designated position, and the anchor is required to be manually received. In view of this, in this embodiment, an engineering barge is introduced for determining, adjusting the position of steel cofferdam 40, and adjusting the anchor forces.
In this embodiment, the first positioning module 10 preferably includes four first anchors 101 fixed at positions near the upstream of the deepwater, a first anchor chain 102 connected to the first anchors 101, a first wire rope 103 having one end connected to the first anchor chain 102, and a first sub-positioning module 104 having one side connected to the other end of the first wire rope 103 and the other side connected to the front side of the steel cofferdam 40. The first sub-positioning module 104 comprises four fourth anchors 1041, two fourth anchors 1041 are arranged near the left bank, the other two fourth anchors 1041 are arranged near the right bank, a fourth anchor chain 1042 is connected with the fourth anchors 1041, one end of a fourth wire rope 1043 is connected with the fourth anchor chain 1042, and a first positioning ship 1044 is connected with the other end of the fourth wire rope 1043 and is connected with the front side of the steel cofferdam 40 through a first pulling cable.
In this embodiment, the second positioning module 20 preferably includes two second anchors 201 fixed at positions near the downstream of the deepwater, a second anchor chain 202 connected to the second anchors 201, a second wire rope 203 having one end connected to the second anchor chain 202, and a second sub-positioning module 204 having one side connected to the other end of the second wire rope 203 and the other side connected to the rear side of the steel cofferdam 40. The second sub-positioning module 204 includes four fifth anchors 2041, two fifth anchors 2041 disposed near the left shore, two other fifth anchors 2041 disposed near the right shore, a fifth anchor chain 2042 connected to the fifth anchors 2041, a fifth wire rope 2043 having one end connected to the fifth anchor chain 2042, and a second positioning vessel 2044 connected to the other end of the fifth wire rope 2043 and connected to the rear side of the steel cofferdam 40 by a second cable.
In this embodiment, it is preferable that the guiding module 30 includes four third anchors 301, two third anchors 301 being disposed near the left shore, and the other two third anchors 301 being disposed near the right shore, a third anchor chain 302 connected to the third anchors 301, a third wire rope 303 having one end connected to the third anchor chain 302, and a guiding vessel 304 connected to the other end of the third wire rope 303 and connected to the left or right side of the steel cofferdam 40.
And arranging 800t (400 t) engineering iron barge positioning ships on the upstream side and the downstream side. The first positioning boat 1044 is disposed about 200m from the bridge axis upstream of the steel cofferdam 40, and the second positioning boat 2044 is disposed about 200m from the bridge axis downstream of the steel cofferdam 40, and the positioning boat functions to determine and adjust the position of the steel cofferdam 40 and the main anchor stress. The parameters of the 800t iron barge positioning ship are that the loading capacity is 800t, the heavy loading draft is 2m, and the external dimension is 40m multiplied by 12m multiplied by 3m. The parameters of the 400t iron barge positioning ship are that the loading capacity is 400t, the dead weight is 132t, the heavy loading draft is 1.5m, and the external dimension is 40m multiplied by 9.2m multiplied by 2.4m.
A winch and an anchor receiving system are arranged above the first positioning ship 1044, and 45 t winches, 1 winch, 4 sets of 4-door pulley blocks, 6 sets of 3-door pulley blocks and 4 sets of 2-door pulley blocks are arranged in total, and are arranged in detail as shown in fig. 3. The winch and anchor handling system arrangement above the second positioning vessel 2044 is similar to the forward positioning vessel, and is detailed in fig. 4.
A first cable is arranged between the first positioning ship 1044 and the steel cofferdam 40, an upper layer of cable and a lower layer of cable are arranged on each surface, a second cable is arranged between the second positioning ship 2044 and the steel cofferdam 40, and an upper layer of cable and a lower layer of cable are arranged on each surface, so that the effect of transmitting external force borne by the steel cofferdam 40 to the first anchor 101, the second anchor 201 and the third anchor 301 is achieved, the effect of resisting influence of flowing water, guaranteeing stability of a positioning system in the water flow direction, fixing the position of the steel cofferdam 40 and adjusting the verticality of the steel cofferdam 40 is achieved.
The four fourth anchors 1041 of the first positioning boat 1044 are disposed on both sides thereof, two near the left shore and two near the right shore, the four fifth anchors 2041 of the second positioning boat 2044 are disposed on both sides thereof, two near the left shore and two near the right shore, the main function is to adjust and control the positioning boat to bear lateral water flow resistance and wind force in the direction perpendicular to the water flow, and the fourth and fifth anchors 2041 are 5t hall anchors.
Four third anchors 301 of the guiding ship 304 are arranged on two sides of the guiding ship, two third anchors 301 close to the left bank and two third anchors close to the right bank are 40t concrete ground anchors, the concrete ground anchors are directly cast in an open pit manner, the third anchors 301 close to the right bank are 75t frog type concrete anchors which are about 200m away from the center of the steel cofferdam 40, the third anchors 301 are fixed by third anchor chains 302, and the front side of the steel cofferdam 40 and the second anchor chains 202 are connected by third steel wire ropes 303, so that the steel cofferdam 40 is prevented from sliding in the vertical direction due to side-stream resistance, wind force and sideslip force generated by a large inclination angle.
In this way, the first positioning ship 1044, the second positioning ship 2044, the guiding ship 304 realize the actions of anchoring, receiving and the like, simplify the processes of anchoring and receiving, greatly improve the construction efficiency, and the fourth anchor 1041 and the fifth anchor 2041 are adopted to realize the positioning of the first positioning ship 1044 and the second positioning ship 2044 in the vertical direction, and the third anchor 301 is adopted to realize the positioning of the guiding ship 304 and the steel cofferdam 40 in the vertical direction.
In this embodiment, the guide vessel 304 is preferably secured to the steel cofferdam 40 by guide brackets, thus ensuring that the vertical orientation of the guide vessel 304 is also oriented in the vertical direction of the steel cofferdam 40.
In this embodiment, preferably, the deck of the ship (the guide ship 304, the first positioning ship 1044, the second positioning ship 2044) is provided with facilities such as a horse-port, a fixed seat, a hoist, a pulley block, a shift room, and the like. An anchor rope dynamometer is arranged between the pulley block and the fixed seat, the stress condition of the anchor rope is monitored, and the stress adjustment of the anchor rope is completed by tightening and loosening the pulley block through a winch, so that the uniform bearing force of each anchor rope is ensured.
In this embodiment, preferably, the anchoring construction is performed by using a 260t floating crane, and after the floating crane positions and anchors, the anchor chain is towed along the direction of the designed anchor rope, so as to ensure the angle of throwing.
From the above description, it can be seen that the following technical effects are achieved:
In the embodiment of the application, the anchoring positioning mode is adopted, the steel cofferdam 40 is connected to the front side of the steel cofferdam 40 and fixed at a position close to the upstream of deep water through the first positioning module 10, the second positioning module 20 is connected to the rear side of the steel cofferdam 40 and fixed at a position close to the downstream of deep water, the guide module 30 is connected to the left side or the right side of the steel cofferdam 40 and fixed at a position close to two sides of deep water, the steel cofferdam 40 is positioned through the cooperation of the first positioning module 10, the second positioning module 20 and the guide module 30, the aim of eliminating the adverse influence of various factors to enable the steel cofferdam 40 not to slide easily is fulfilled, the technical effects that the bottomless steel cofferdam 40 can be positioned effectively in deep water without covering a rock surface, large inclination angle and high water urgency are achieved, and the technical problem that the bottomless steel cofferdam 40 cannot be positioned in deep water is solved.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
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| CN202010733895.5A CN111764418B (en) | 2020-07-27 | 2020-07-27 | Steel cofferdam positioning system in deep water |
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| CN106759407A (en) * | 2017-03-01 | 2017-05-31 | 中国五冶集团有限公司 | A kind of method of cofferdam transportation by driving positioning |
| CN212715000U (en) * | 2020-07-27 | 2021-03-16 | 中交路桥建设有限公司 | Steel cofferdam positioning system in deep water |
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| CN202688882U (en) * | 2012-07-12 | 2013-01-23 | 中铁二十局集团有限公司 | Cofferdam lowering positioning platform for double-wall steel cofferdam construction of deep-water bridge pier |
| CN206070547U (en) * | 2016-09-27 | 2017-04-05 | 中交第二航务工程局有限公司 | A kind of steel cofferdam list station keeping ship alignment system |
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| CN106759407A (en) * | 2017-03-01 | 2017-05-31 | 中国五冶集团有限公司 | A kind of method of cofferdam transportation by driving positioning |
| CN212715000U (en) * | 2020-07-27 | 2021-03-16 | 中交路桥建设有限公司 | Steel cofferdam positioning system in deep water |
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