CN112376916A - Prestressed steel cable tensioning and tightening device and construction method - Google Patents
Prestressed steel cable tensioning and tightening device and construction method Download PDFInfo
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- CN112376916A CN112376916A CN202011318387.7A CN202011318387A CN112376916A CN 112376916 A CN112376916 A CN 112376916A CN 202011318387 A CN202011318387 A CN 202011318387A CN 112376916 A CN112376916 A CN 112376916A
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- adjusting screw
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Abstract
The invention provides a prestressed steel cable tensioning and tightening device and a construction method, and relates to the technical field of steel structure building construction, wherein the prestressed steel cable tensioning and tightening device comprises a fixed support, a high-strength rope and a hoisting device; the fixed bracket is fixed in the middle of the adjusting screw rod; the two high-strength ropes are respectively wound at two ends of the adjusting screw rod; wherein one end of each high-strength rope is fixed on the fixed support, and the other end of each high-strength rope is connected with the hoisting device. According to the invention, the two high-strength ropes wound around the hoisting device are pulled, and the high-strength ropes generate torque to the adjusting screw rod to rotate the adjusting screw rod, so that the inhaul cables at two ends move towards the middle, and the effect of screwing up the steel inhaul cables is achieved. Therefore, the device can easily realize the prestress tensioning and tightening of the steel stay cable, is suitable for the stay cable with larger pre-tightening force of the large-diameter cable, has easy control of the tightening force, can replace the traditional chain wrench for tightening construction, thereby avoiding the conditions that the wrench is bent and the chain is broken and can not be used, and has higher safety.
Description
Technical Field
The invention relates to a prestressed steel cable tensioning and tightening device and a construction method, and belongs to the technical field of steel structure building construction.
Background
At present, more and more large space structures use prestressed inhaul cables. The prestress technology is applied to the structure, so that the structural rigidity can be increased, the structural weight is reduced, the steel consumption is reduced, various novel structural systems are created, and the effect is more remarkable particularly in a large-span steel structure. To build up a prestress in the stay, it is inevitably necessary to tension the stay and then tighten the adjusting screw.
The tensioning and tightening method of the prestressed stay cable used in the current engineering mainly comprises the following steps: firstly, a hydraulic jack applies pulling force to a tensioning cable head to enable the thread of the adjusting section of the tensioning cable to be in a low stress state, then a chain of a chain wrench wraps an adjusting screw rod, and the adjusting screw rod is tightened by applying torque tightening force through the wrench to complete tensioning of the tensioning cable. It is worth noting that for small diameter cables, the cable tensioning method is suitable; however, for large-diameter cables (the diameter is larger than 100 mm), the pre-tightening cable force is large and is not easy to control, and the chain wrench is adopted for tightening construction, so that the condition that the wrench is bent and cannot be used is often caused, even the chain is broken and popped out, the condition that operators are accidentally injured occurs, and great potential safety hazards exist.
The present application was made based on this.
Disclosure of Invention
In order to solve the defect that a chain wrench is used for screwing in the current large-diameter cable tensioning construction, the invention provides a prestressed steel cable tensioning and screwing device and a construction method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a prestressed steel cable tensioning and tightening device comprises a fixed support, a high-strength rope and a hoisting device; the fixed bracket is fixed in the middle of the steel cable adjusting screw; the two high-strength ropes are respectively wound at two ends of the adjusting screw; one end of each high-strength rope is fixed on the fixed support, and the other end of each high-strength rope is connected with the hoisting device.
Preferably, the two high-strength ropes are respectively wound on the adjusting screw rods in opposite directions; two ends of the two high-strength ropes are respectively exerted with pulling force by two hoisting devices, and the installation positions are respectively positioned at two sides of the steel inhaul cable adjusting screw.
Preferably, the fixed support adopts a detachable and adjustable structure and comprises two clamping plates which are respectively arranged at the upper side and the lower side of the adjusting screw rod and two fixed bolts which are respectively arranged at the two ends of the clamping plates and connected with the upper clamping plate and the lower clamping plate; a plurality of bolt holes are distributed at the two ends of the clamping plate at intervals along the length direction of the clamping plate, and the fixing bolt can be selectively installed in any one of the bolt holes.
Preferably, the hoisting device adopts a chain block, one end of the chain block is connected with the high-strength rope, and the other end of the chain block is fixed on a peripheral fixing structure.
Preferably, the high-strength rope is a steel wire rope.
Preferably, the two high-strength ropes are respectively installed and connected on the diagonal lines of the fixing support.
Preferably, one end of the high-strength rope is provided with a shackle, and the high-strength rope is detachably and fixedly connected with the bolt hole in the clamping plate through the shackle.
A construction method of a prestressed steel cable tensioning and tightening device comprises the following steps:
(1) selecting a proper clamping plate and a matched fixing screw according to the specification of an adjusting screw of the steel cable;
(2) a clamping plate is respectively placed on the upper and lower sides of the steel cable adjusting screw in parallel, and two ends of the clamping plate are temporarily clamped and fixed through a fixing screw;
(3) connecting the two high-strength ropes with bolt holes at the end part of the clamping plate respectively through shackles, and winding the two high-strength ropes on an adjusting screw rod of a steel inhaul cable respectively in the opposite directions;
(4) one end of each of the two sets of chain blocks is connected with the end part of the wound steel wire rope, and the other end of each of the two sets of chain blocks is connected with the peripheral fixed structure and pre-tightened;
(5) when the steel cable is stretched to the extent that the cable adjusting screw can be screwed, the chain block is stretched to screw the cable adjusting screw;
(6) after the first tightening is finished, the connection between the chain block and the steel wire rope is loosened, the steel wire rope is wound again according to the mode, the chain block is fixed, and the next stage of the inhaul cable is waited to be tensioned and tightened;
(7) and repeating the operations to the whole tensioning process, and finally completing the prestress tensioning and tightening of the inhaul cable adjusting screw.
The principle of the invention is as follows: according to the invention, the two high-strength ropes are pulled to wind the high-strength ropes through the hoisting device, the high-strength ropes generate torque to the adjusting screw rod to enable the adjusting screw rod to rotate, and the threads at the two ends of the adjusting screw rod are opposite, so that the inhaul cables at the two ends can move towards the middle, and the effect of tensioning the steel inhaul cable while tightening the screw rod is achieved. The device has the advantages that the device can easily control the tightening force, can replace the traditional chain wrench for tightening construction, thereby avoiding the conditions that the wrench is bent and the chain is broken and cannot be used, and has higher safety.
The invention can realize the following technical effects:
(1) the prestressed inhaul cable tightening device is simple in form and simple in structure;
(2) the prestressed inhaul cable tightening device has the advantages that materials can be repeatedly utilized;
(3) the tightening method of the prestressed stay cable has the advantages of convenient construction and simple disassembly;
(4) the tightening method of the prestressed stay cable has the advantages of large tightening torque and high safety.
Drawings
FIG. 1 is an axonometric view of the prestressed steel cable tensioning and tightening device in the present embodiment during construction;
fig. 2 is a cross-sectional view of the cable connection of the prestressed steel cable tensioning and tightening device of the present embodiment.
Description of the labeling: the clamp plate comprises a clamp plate 1, a bolt hole 11, a fixing screw rod 2, a chain block 3, a steel wire rope 4, a shackle 41, a steel cable 5, an adjusting screw rod 51, a screwing abutment 52 and a peripheral fixing structure 6.
Detailed Description
In order to make the technical means and technical effects achieved by the technical means of the present invention more clearly and more perfectly disclosed, the following embodiments are provided, and the following detailed description is made with reference to the accompanying drawings:
as shown in fig. 1 to 2, in the prestressed steel cable tensioning and tightening device of the present embodiment, the steel cable to be tensioned and tightened includes an adjusting screw and a tightening abutment; the tensioning and tightening device comprises a fixed support, a high-strength rope and a hoisting device; the fixed bracket is fixed in the middle of the adjusting screw rod; the two high-strength ropes are respectively wound at two ends of the adjusting screw rod; wherein one end of each high-strength rope is fixed on the fixed support, and the other end of each high-strength rope is connected with the hoisting device. Through hoisting apparatus, stimulate two winding high-strength ropes, the high-strength rope produces the moment of torsion to adjusting screw, makes adjusting screw rotate, because the screw thread at adjusting screw both ends is opposite, consequently can make the cable at both ends all to middle removal, plays the effect of screwing up the steel cable. The device has the advantages that the device can easily control the tightening force, can replace the traditional chain wrench for tightening construction, thereby avoiding the conditions that the wrench is bent and the chain is broken and cannot be used, and has higher safety.
Preferably, in this embodiment, two high-strength ropes are respectively wound around the adjusting screw rod in opposite directions; and the two hoisting devices apply tensile force respectively, and the installation positions are respectively positioned at the two sides of the adjusting screw rod. The winding number of turns can be determined according to the tension force and the thread space of the inhaul cable screw. Through the hoisting devices on two sides of the hoisting and traction device, the stress of the adjusting screw rod is more balanced, and the screwing work is efficiently completed.
In a preferred embodiment, the fixing bracket is of a detachable and adjustable structure and comprises two clamping plates which are respectively arranged at the upper side and the lower side of the adjusting screw rod and two fixing bolts which are respectively arranged at the two ends of the clamping plates and connected with the upper clamping plate and the lower clamping plate; cardboard both ends all have a plurality of bolt holes along cardboard length direction interval distribution, and fixing bolt optional mounting is in above-mentioned arbitrary bolt hole, selects the bolt hole of installation according to adjusting screw's specification (diameter), therefore this tightening device is applicable in the cable adjusting screw of multiple specification, and owing to can dismantle, reuse.
In this embodiment, preferably, the hoisting device is a chain block, one end of the chain block is connected to the high-strength rope, the other end of the chain block is fixed to the peripheral fixing structure, and the two sets of chain block operation surfaces do not interfere with each other. Through chain block, under the stronger condition of manual operation controllability, can also be very laborsaving.
Preferably, the high-strength rope adopts a steel wire rope, so that the strength is high, and the loadable tension and torque are stronger.
In the preferred embodiment, the two high-strength ropes are respectively installed and connected on the diagonal lines of the fixing support, so that the stress balance of the adjusting screw rod is further ensured.
This embodiment is preferred, and the pier block is screwed up to cardboard and cable adjusting screw in the fixed bolster, and two cardboards are fixed in adjusting screw and are screwed up pier department in the middle of promptly, and parallel arrangement in adjusting screw both sides can guarantee the intensity of fixed bolster, and when the fixed bolster was rotatory, adjusting screw synchronous revolution simultaneously.
This embodiment is preferred, and the one end of the rope that excels in is equipped with the shackle, can dismantle fixed connection through the bolt hole on shackle and the cardboard.
The construction method of the prestressed steel cable tensioning and tightening device comprises the following steps:
(1) selecting a proper clamping plate and a matched fixing bolt according to the specification of an adjusting screw rod of the steel inhaul cable;
(2) a clamping plate is respectively placed on the upper and lower sides of the steel cable adjusting screw in parallel, and two ends of the clamping plate are temporarily clamped and fixed through a fixing screw;
(3) connecting two high-strength ropes with bolt holes at the end part of the clamping plate respectively through shackles, and winding the two high-strength ropes on an adjusting screw rod of a steel inhaul cable in the opposite direction;
(4) one end of each of the two sets of chain blocks is connected with the end part of the wound steel wire rope, and the other end of each of the two sets of chain blocks is connected with the peripheral fixed structure and pre-tightened;
(5) when the steel cable is stretched to the extent that the cable adjusting screw can be screwed, the chain block is stretched to screw the cable adjusting screw;
(6) after the first tightening is finished, the connection between the chain block and the steel wire rope is loosened, the steel wire rope is wound again according to the mode, the chain block is fixed, and the next stage of the inhaul cable is waited to be tensioned and tightened;
(7) and repeating the operations to the whole tensioning process, and finally completing the prestress tensioning and tightening of the inhaul cable adjusting screw.
The above description is provided for the purpose of further elaboration of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be understood that the embodiments of the present invention are limited to the above description, and it should be understood that various simple deductions or substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and all such alternatives are included in the scope of the present invention.
Claims (8)
1. The utility model provides a prestressing force steel cable stretch-draw tightening device which characterized in that: the tensioning and tightening device comprises a fixed support, a high-strength rope and a hoisting device; the fixed bracket is fixed in the middle of the steel cable adjusting screw; the two high-strength ropes are respectively wound at two ends of the adjusting screw; one end of each high-strength rope is fixed on the fixed support, and the other end of each high-strength rope is connected with the hoisting device.
2. A prestressed steel cable tensioning and tightening device as claimed in claim 1, wherein: the two high-strength ropes are respectively wound on the adjusting screw rods in opposite directions; two ends of the two high-strength ropes are respectively exerted with pulling force by two hoisting devices, and the installation positions are respectively positioned at two sides of the steel inhaul cable adjusting screw.
3. A prestressed steel cable tensioning and tightening device as claimed in claim 1, wherein: the fixed support adopts a detachable and adjustable structure and comprises two clamping plates which are respectively arranged on the upper side and the lower side of the adjusting screw rod and two fixed bolts which are respectively arranged on the two ends of the clamping plates and are connected with the upper clamping plate and the lower clamping plate; a plurality of bolt holes are distributed at the two ends of the clamping plate at intervals along the length direction of the clamping plate, and the fixing bolt can be selectively installed in any one of the bolt holes.
4. A prestressed steel cable tensioning and tightening device as claimed in claim 1, wherein: the hoisting device adopts a chain block, one end of the chain block is connected with the high-strength rope, and the other end of the chain block is fixed on a peripheral fixed structure.
5. A prestressed steel cable tensioning and tightening device as claimed in claim 1, wherein: the high-strength rope is a steel wire rope.
6. A prestressed steel cable tensioning and tightening device as claimed in claim 1, wherein: the two high-strength ropes are respectively installed and connected on the diagonal lines of the fixed support.
7. A prestressed steel cable tensioning and tightening device as claimed in claim 3, wherein: one end of the high-strength rope is provided with a shackle, and the high-strength rope is detachably and fixedly connected with the bolt hole in the clamping plate through the shackle.
8. A construction method of a prestressed steel cable tensioning and tightening device comprises the following steps:
(1) selecting a proper clamping plate and a matched fixing screw according to the specification of an adjusting screw of the steel cable;
(2) a clamping plate is respectively placed on the upper and lower sides of the steel cable adjusting screw in parallel, and two ends of the clamping plate are temporarily clamped and fixed through a fixing screw;
(3) connecting the two high-strength ropes with bolt holes at the end part of the clamping plate respectively through shackles, and winding the two high-strength ropes on an adjusting screw rod of a steel inhaul cable respectively in the opposite directions;
(4) one end of each of the two sets of chain blocks is connected with the end part of the wound steel wire rope, and the other end of each of the two sets of chain blocks is connected with the peripheral fixed structure and pre-tightened;
(5) when the steel cable is stretched to the extent that the cable adjusting screw can be screwed, the chain block is stretched to screw the cable adjusting screw;
(6) after the first tightening is finished, the connection between the chain block and the steel wire rope is loosened, the steel wire rope is wound again according to the mode, the chain block is fixed, and the next stage of the inhaul cable is waited to be tensioned and tightened;
(7) and repeating the operations to the whole tensioning process, and finally completing the prestress tensioning and tightening of the inhaul cable adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011318387.7A CN112376916A (en) | 2020-11-23 | 2020-11-23 | Prestressed steel cable tensioning and tightening device and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011318387.7A CN112376916A (en) | 2020-11-23 | 2020-11-23 | Prestressed steel cable tensioning and tightening device and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN112376916A true CN112376916A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011318387.7A Pending CN112376916A (en) | 2020-11-23 | 2020-11-23 | Prestressed steel cable tensioning and tightening device and construction method |
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| CN (1) | CN112376916A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622641A (en) * | 2021-08-23 | 2021-11-09 | 盛世华邦建设工程有限公司 | Be used for high altitude support of encorbelmenting |
| CN114215184A (en) * | 2021-12-29 | 2022-03-22 | 浙江精工钢结构集团有限公司 | Rear locking device for steel cable clamp and construction method thereof |
-
2020
- 2020-11-23 CN CN202011318387.7A patent/CN112376916A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622641A (en) * | 2021-08-23 | 2021-11-09 | 盛世华邦建设工程有限公司 | Be used for high altitude support of encorbelmenting |
| CN114215184A (en) * | 2021-12-29 | 2022-03-22 | 浙江精工钢结构集团有限公司 | Rear locking device for steel cable clamp and construction method thereof |
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