CN110697570A - Tower top main cable saddle mounting system and using method thereof - Google Patents
Tower top main cable saddle mounting system and using method thereof Download PDFInfo
- Publication number
- CN110697570A CN110697570A CN201910912138.1A CN201910912138A CN110697570A CN 110697570 A CN110697570 A CN 110697570A CN 201910912138 A CN201910912138 A CN 201910912138A CN 110697570 A CN110697570 A CN 110697570A
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- China
- Prior art keywords
- saddle
- wire rope
- steel wire
- main cable
- tower
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C11/00—Trolleys or crabs, e.g. operating above runways
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C11/00—Trolleys or crabs, e.g. operating above runways
- B66C11/16—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/14—Trolley or crane travel drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/30—Rope, cable, or chain drums or barrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/08—Arrangements of sheaves
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a tower top main cable saddle mounting system, which comprises: the tower top support portal frame comprises two saddle type winches, a rope winding system and a bearing steel wire rope; wherein, the rope winding system comprises: an upper pulley set and a lower pulley set; the upper pulley block and the lower pulley block are vertically arranged, and the upper pulley block and the lower pulley block are connected in series through a bearing steel wire rope; the invention has the characteristics of simple structure, low manufacturing cost, convenient operation and the like, increases the friction force between the bearing steel wire rope and the saddle of the winch based on the friction self-locking principle, ensures the safe lifting of heavy objects, brings convenience for the super-long distance lifting construction, and has higher popularization significance.
Description
Technical Field
The invention relates to the technical field of bridge construction machinery. More particularly, the present invention relates to a tower top main cable saddle mounting system and method of use.
Background
The suspension bridge is one of the main forms of extra-large span bridges, except two cable-stayed bridges of a sutong bridge and a hong Kong Oncao bridge, and other bridges with the span of more than 1000m are all suspension bridges. Due to the structural characteristics of the suspension bridge, more and more suspension bridges begin to be built, wherein the Jinan Jinshajiang bridge is one of the suspension bridges which are currently built.
The tower top cable saddle is one of the key structures of the suspension bridge and bears most of the weight of the upper structure. Therefore, the tower top cable saddle structure is generally heavy, a steel wire rope with a large diameter and a large multiplying power of the pulley block are often required to be selected for hoisting, and the rope capacity of the winch is required to be more than kilometers. If adopt conventional storage rope drum hoist engine, not only have higher requirement to tower top portal headspace, the hoist engine dead weight increases and also has great influence to tower top portal structure atress.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a tower top main cable saddle mounting system and a using method thereof, which have the characteristics of simple structure, low manufacturing cost, convenient operation and the like, bring convenience for ultra-long distance hoisting construction, and have higher popularization significance.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an overhead main cable saddle mounting system comprising:
the tower top support portal is fixed on the main bridge pier;
two saddle type winches, a winding system and a bearing steel wire rope;
wherein, the rope winding system comprises: an upper pulley set and a lower pulley set; the upper pulley block and the lower pulley block are vertically arranged, and the upper pulley block and the lower pulley block are connected in series through a bearing steel wire rope;
wherein, the two saddle winches are fixed on the support gantry at the top of the tower; one end of the bearing steel wire rope is fixed and wound with one saddle type winch, and the other end of the bearing steel wire rope is fixed and wound on the other saddle type winch after penetrating through the winding rope system.
Preferably, the device further comprises a translation crown block, the translation crown block is connected with a vertical winch fixedly arranged on the translation crown block through a pull rope, and the upper pulley block is fixedly arranged on the lower portion of the translation crown block.
Preferably, the tower top support portal is a cantilever structure fixed on the top of the main tower of the suspension bridge.
Preferably, the bottom of the lower pulley block is provided with a balance lifting tool for adjusting the gravity center deviation of the hoisting object.
Preferably, the bearing steel wire rope is wound between the upper pulley block and the pulleys of the pulley block and the lower pulley block alternately.
The application method of the tower top main cable saddle mounting system is characterized in that when a heavy object is hoisted, two saddle-type winches are started simultaneously to recover a bearing steel wire rope.
The invention at least comprises the following beneficial effects:
according to the invention, a rope winding system is adopted, and a bearing steel wire rope is wound between two pulley blocks, so that the system can be based on a friction self-locking principle, and the larger the quantity of a hoisting material is, the larger the friction force between the steel wire rope and a saddle of a winch is, and the safe hoisting of a heavy object is ensured;
on the other hand, because the winch is not provided with the steel wire rope storage drum, the self volume and the weight of the winch are reduced, the stress on the gantry support structure at the top of the tower is more favorable, and the further optimization of the hoisting support structure can be realized.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a tower top cable saddle structure according to one embodiment of the present invention;
fig. 2 is a schematic diagram of the connection relationship of the upper pulley block of the tower top cable saddle according to one embodiment of the present invention;
fig. 3 is a schematic view of the connection relationship of the lower pulley block of the tower top cable saddle according to one embodiment of the present invention;
fig. 4 is a schematic diagram of the rope winding system according to one embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
As shown in fig. 1-4, a tower top main cable saddle mounting system comprises
The tower top support portal 005 is a cantilever structure fixed at the top of a main tower of the suspension bridge, and the whole tower top support portal 005 is fixed on a main bridge pier 004 and provides a carrier structure for a crane;
two saddle-type winches 001, a winding system and a bearing steel wire rope 002; the two saddle-type winches 001 are fixed above the tower top support portal 005, and the winding rope system is fixed on the tower top support portal 005;
wherein, the rope winding system comprises: an upper pulley set 006 and a lower pulley set 007; the upper pulley block 006 and the lower pulley block 007 are vertically arranged, the upper pulley block 006 is positioned above the lower pulley block 007, and the upper pulley block 006 and the lower pulley block 007 are connected in series through a bearing steel wire rope 002; as shown in fig. 4, the bearing steel wire rope 002 is wound back and forth alternately between the upper pulley block 006 and the pulleys of the lower pulley block 007;
the lower pulley block 007 is further provided with a balance lifting tool 010 for adjusting gravity center deviation of a lifting object, so that the lifting of the tower top main cable saddle 003 is more stable, and the safe lifting of a heavy object is ensured;
the saddle type winch 001 is a winch of a non-rope storage system which is improved on the basis of a conventional rope storage drum winding type winch, can reduce the structural size of the winch and is convenient to arrange in a specific narrow space;
one end of the bearing steel wire rope 002 is fixed with one saddle type winch 001, and is wound out of the saddle and wound into a winding system after being wound on the saddle for a plurality of circles, after enough multiplying power is formed on the winding system, the main consideration here is to reduce the load of a single steel wire rope, the load of the single steel wire rope is the total hoisting weight/multiplying power, and the other end of the bearing steel wire rope passes through the winding system and is wound onto the other saddle type winch 001 according to the winding mode of the former saddle type winch 001;
the model, the standard and the style of the pulley block on the winding system need to be selected according to the hoisting capacity to obtain a standard part, and the standard part is further used for installing the winding system, and the bearing steel wire rope 002 needs to form enough multiplying power between the upper pulley block 006 and the lower pulley block 007, and the enough multiplying power can meet the requirement of the hoisting strength of a heavy object by taking the following conditions in actual operation as reference;
the installation system mainly utilizes the friction force between the bearing steel wire rope 002 and the saddle to lift the heavy object; the lifting mode is based on the friction self-locking principle, and the larger the lifting material amount is, the larger the friction force between the steel wire rope and the saddle of the winch is, and the safe lifting of the heavy object is ensured. Meanwhile, because no steel wire rope storage drum is arranged, the self volume and weight of the winch are reduced, the supporting structure of the gantry on the top of the tower is stressed more favorably, and the further optimization of the lifting supporting structure can be realized.
In another technical scheme, still include translation overhead traveling crane 009, translation overhead traveling crane 009 sets up on the support portal 005 of top of the tower, the fixed vertical hoist engine 008 that is provided with in the position that is close to pier 004 on the support portal 005 of top of the tower, translation overhead traveling crane 009 through drawing the liter with vertical hoist engine 008 is connected, vertical hoist engine 008 rotates retrieves the stay cord and makes translation overhead traveling crane 009 can round trip movement on the support portal 005 of top of the tower, saddle formula hoist engine 001 with rich rope system all sets up on the translation overhead traveling crane 009, adopt this technical scheme can make the hoist of top of the tower cable saddle more nimble, have bigger maneuverability.
The use method of the tower top main cable saddle 003 mounting system comprises the steps of firstly selecting the types of an upper pulley block 006 and a lower pulley block 007 of a rope winding system according to the specification of a tower top main cable saddle 003 to be hoisted, determining the multiplying power of a bearing steel wire rope 002 to meet the hoisting strength requirement of the main cable saddle 003, starting a two-saddle type winch 001 to lengthen the bearing steel wire rope 002 after the mounting is finished, the lower pulley block 007 and the balance lifting tool 010 arranged on the lower pulley block 007 descend by the gravity of the lower pulley block, the balance lifting tool 010 is assembled with a tower top main cable saddle 003 which needs to be lifted and installed, and after the complete assembly is confirmed, simultaneously, the two saddle type windlasses 001 are started to roll up the bearing steel wire rope 002, at the moment, because the main cable saddle 003 at the top of the tower has large weight, the friction force between the bearing steel wire rope 002 and the winch saddle is larger, so that the safe hoisting of the tower top main cable saddle 003 can be ensured;
by adopting the technical scheme, based on the friction self-locking principle, the tower top main cable saddle 003 with larger hoisting weight and large friction force between the bearing steel wire rope 002 and the winch saddle effectively ensure the stable and safe lifting of the tower top main cable saddle 003; meanwhile, as the steel wire rope storage drum is not arranged on the saddle type winch 001, the self volume and weight of the winch are reduced, the stress on the tower top portal support structure is more favorable, and the hoisting support structure can be further optimized.
The following is one example of a practical application:
in the construction of a Jinshajiang bridge in Jinan, the device in the technical scheme is adopted to carry out the installation construction of the main cable saddle;
the main cable saddle body adopts a cast-weld combined mixed structure, the saddle groove, the longitudinal ribs, the transverse ribs and the bottom plate are cast by cast steel, the side plates are welded by steel plates, a stainless steel plate-polytetrafluoroethylene plate sliding pair is arranged below the saddle body so as to be suitable for relative movement in construction, vertical partition plates are arranged in the saddle groove along the bridge direction, after all cable strands are in place and are stranded, the top of the cable strand is filled by a zinc block, and then the side wall of the saddle groove is clamped by a bolt. The top of the tower is provided with a grating base for installing a main saddle, the jacking frame and the grating are connected into a whole for installing a jack pushed by a cable saddle, and the saddle body cuts off the suspended part of the grating after in place. 2 sets of main cable saddle Lijiang river banks are arranged, the weight of a single saddle body of Lijiang river banks is 113.999t, in order to reduce the weight of hoisting and transportation, the saddle body is divided into two halves, the single half is about 57t, and the saddle body is hoisted to the top of the tower and spliced by high-strength bolts. Upper bearing plate 13.582t, lower bearing plate 18.403t, grid and reaction frame weight 33.008 t.
Installation and construction of main cable saddle
(1) Main cable saddle transporting and unloading vehicle
The main cable saddle is transported to the tower bottom by a cable saddle manufacturer, the grating, the upper bearing plate and the lower bearing plate are hoisted by a 75t crawler crane for unloading, the saddle body is hoisted by a gantry system for unloading, and finally, the hoisting and installation are carried out by a hoisting system of a cantilever gantry hoist at the tower top, and other small components are hoisted by a TC7035-16 tower crane.
(2) Hoisting construction of main cable saddle
The left and right tower columns adopt a set of complete hoisting and mounting systems respectively, 2 hoisting winches with 10t and 4 pulley blocks with 5 handles and 100t are arranged on the left and right tower columns respectively, wherein the number of the pulleys on each pulley block is 5 for two upper pulley blocks and two lower pulley blocks, and the upper pulley block at the position can be the existing hoisting pulley;
firstly, hoisting the grating, ensuring the stability in the hoisting process, moving a flatcar at the top of a portal frame after hoisting to a construction design height, pulling two sides of the flatcar to a design position by adopting 3 chain blocks of 5t, and slowly lowering the barrier to the top of the tower;
measuring the elevation and the plane position of the accurately positioned grating, pouring the grating concrete after meeting the design requirement, and ensuring the position of the grating to be kept unchanged in the concrete construction;
sequentially hoisting a lower bearing plate, an upper bearing plate, a side-span side saddle body and a mid-span side saddle body;
connecting the two half saddles by high-strength bolts, gradually pushing the cable saddle to the right position along with the hoisting of the steel truss girder and the completion of the pavement of the bridge deck in the installation process of the upper structure of the main bridge, and finally cutting off the grid jack reaction frame.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (6)
1. Top of tower main cable saddle installing the system including the support portal in the top of tower, it is fixed on main pier, its characterized in that still includes:
two saddle type winches, a winding system and a bearing steel wire rope;
wherein, the rope winding system comprises: an upper pulley set and a lower pulley set; the upper pulley block and the lower pulley block are vertically arranged, and the upper pulley block and the lower pulley block are connected in series through a bearing steel wire rope;
wherein, the two saddle winches are fixed on the support gantry at the top of the tower; one end of the bearing steel wire rope is fixed and wound with one saddle type winch, and the other end of the bearing steel wire rope is fixed and wound on the other saddle type winch after penetrating through the winding rope system.
2. The tower top main cable saddle mounting system of claim 1, further comprising a translating crown block connected to a fixedly disposed vertical hoist by a pull rope, said upper pulley block being fixedly disposed on a lower portion of said translating crown block.
3. The overhead main cable saddle mounting system of claim 1, wherein said overhead support mast is a cantilevered structure secured to the top of a main tower of a suspension bridge.
4. The tower top main cable saddle mounting system of claim 1, wherein the bottom of the lower pulley block is provided with a balancing sling for adjusting the center of gravity offset of the lifting object.
5. The overhead main cable saddle mounting system of claim 1, wherein the load bearing wire rope is alternately routed between the upper pulley set and the pulleys of the pulley set and the lower pulley set.
6. The method for using the tower top main cable saddle installation system according to claim 1, wherein when the main cable saddle is hoisted, two saddle winches are simultaneously started to wind the bearing steel wire rope for the purpose of hoisting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912138.1A CN110697570A (en) | 2019-09-25 | 2019-09-25 | Tower top main cable saddle mounting system and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912138.1A CN110697570A (en) | 2019-09-25 | 2019-09-25 | Tower top main cable saddle mounting system and using method thereof |
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| Publication Number | Publication Date |
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| CN110697570A true CN110697570A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910912138.1A Pending CN110697570A (en) | 2019-09-25 | 2019-09-25 | Tower top main cable saddle mounting system and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356082A (en) * | 2021-07-16 | 2021-09-07 | 中国十九冶集团有限公司 | Method for dismantling steel cofferdam for bridge construction water retaining |
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2019
- 2019-09-25 CN CN201910912138.1A patent/CN110697570A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356082A (en) * | 2021-07-16 | 2021-09-07 | 中国十九冶集团有限公司 | Method for dismantling steel cofferdam for bridge construction water retaining |
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