CN110965480A - Temporary support dismantling device and dismantling method - Google Patents
Temporary support dismantling device and dismantling method Download PDFInfo
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- CN110965480A CN110965480A CN201911397510.6A CN201911397510A CN110965480A CN 110965480 A CN110965480 A CN 110965480A CN 201911397510 A CN201911397510 A CN 201911397510A CN 110965480 A CN110965480 A CN 110965480A
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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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Abstract
The invention provides a temporary support dismantling device and a dismantling method, and the technical scheme is characterized in that the temporary support dismantling device comprises a first traction device and a second traction device, wherein the first traction device and the second traction device are respectively connected with traction ropes for traction of a support cross rod to be dismantled, and the two traction ropes are respectively used for applying traction forces in different directions to the support cross rod and enabling the resultant force of the traction forces and the gravity of the support cross rod to form stress balance; the traction direction of one of the traction ropes faces obliquely upwards so as to avoid an obstacle right above the support cross bar; the traction direction of the other traction rope faces to the horizontal direction of the opposite side of the obliquely upper mirror image or the other obliquely upper side; the first traction device comprises a tower crane, and the traction rope is connected with the tower crane in a way that the traction direction faces the obliquely upper direction. The temporary support dismantling device can prevent the support cross rod from swinging after separation, so that the cutting dismantling process is more convenient and the safety is higher.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a temporary support dismantling device and a dismantling method.
Background
In the bridge construction field, the pylon can adopt the tilting design in some bridge king-towers, and along with the rising of segmentation, the pylon can produce too big horizontal displacement because of construction load and structure dead weight, wind load etc.. In order to overcome the outward inclination displacement and the outward inclination force of the tower column, prevent the concrete on the inner side of the tower root from cracking due to tension, and overcome the overturning moment generated by the template and the concrete under the action of gravity, a temporary support rod needs to be arranged in the construction process of the tower column. The stay bar has enough strength and rigidity, is fixedly connected with the tower column, and is dismantled after the cable tower is completely constructed. In the existing construction process, the temporary support dismantling method mainly provides upward traction for the support rod by means of the tower crane, the support rod is cut by the aid of the cutting device, and after the support rod is cut off, the support rod is easy to swing under the inertia effect of the traction of the tower crane, so that the problem of high safety exists, and the dismantling process is troublesome. .
Disclosure of Invention
The invention aims to provide a temporary support dismantling device which is convenient to dismantle a temporary support and has high safety.
Another object of the present invention is to provide a dismantling method of the above temporary support dismantling device.
In order to achieve the purpose, the invention provides the following technical scheme:
a temporary support dismantling device comprises a first traction device and a second traction device, wherein traction ropes for traction of a support cross rod to be dismantled are connected to the first traction device and the second traction device respectively, and the two traction ropes are used for applying traction forces in different directions to the support cross rod respectively and enabling the resultant force of the traction forces and the gravity of the support cross rod to form stress balance; the traction direction of one of the traction ropes faces obliquely upwards so as to avoid an obstacle right above the support cross bar; the traction direction of the other traction rope faces to the horizontal direction of the opposite side of the obliquely upper mirror image or the other obliquely upper side; the first traction device comprises a tower crane, and the traction rope is connected with the tower crane in a way that the traction direction faces the obliquely upper direction.
Further setting: the temporary support removal device further comprises a guide member around which the pulling rope passes and extends towards the second pulling device.
Further setting: the second traction device comprises a winch.
Further setting: the two hauling ropes are respectively used for being connected with two different hauling points on the circumferential direction of the supporting cross rod.
The invention also provides a temporary support dismantling method, wherein two traction forces in different directions are pre-applied to a support cross rod to be dismantled, so that the resultant force of the two traction forces and the gravity of the support cross rod form stress balance; the different directions include an obliquely upper direction, and a horizontal direction or another obliquely upper direction toward an opposite side of the obliquely upper mirror image;
cutting two ends of the supporting cross rod;
adjusting the two traction forces to make the support cross bar hang;
and adjusting the two traction forces to enable the supporting cross rod to be lowered to a specified position.
Further setting: in the step of pre-applying two traction forces in different directions to the support cross rod to be detached, a tower crane is adopted to apply an obliquely upward traction force to the support cross rod, a winch is adopted to apply a horizontal traction force towards the side opposite to the obliquely upward mirror image to the support cross rod, and the two traction forces and the gravity of the support cross rod form stress balance.
Further setting: in the step of adjusting the traction force to enable the support cross rod to be suspended, a tower crane is used for winding a traction rope to pull the support cross rod to move upwards, and a winch is used for releasing the traction rope synchronously to enable the support cross rod to be suspended under the tower crane.
Compared with the prior art, the scheme of the invention has the following advantages:
1. in the temporary support dismantling device, the first traction device and the second traction device respectively pre-apply traction forces in different directions to the support cross rod, the resultant force of the two traction forces and the gravity of the support cross rod form stress balance, and the two pre-applied traction forces and the support cross rod form stress balance after the support cross rod is cut and dismantled, so that the support cross rod can be prevented from swinging after being separated, the cutting and dismantling process is more convenient, and the safety is higher.
2. According to the temporary support dismantling method, the tower crane and the winch are used for respectively drawing the support cross rod, after the support cross rod is dismantled, the support cross rod is lifted by the tower crane, the winch synchronously releases the support cross rod, the support cross rod moves to the position right below the tower crane, the support cross rod is released by the tower crane to be descended to the ground, and the winch and the tower crane form a double-drawing effect on the support cross rod, so that the support cross rod is not easy to swing in the vertical falling process, and the safety is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram in one embodiment of the present invention;
FIG. 2 is a schematic diagram of the support rail descending process according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As shown in fig. 1, the invention provides a temporary support dismantling device, which comprises a first traction device and a second traction device, wherein the first traction device and the second traction device are respectively connected with traction ropes 2 for traction of a support cross rod 1 to be dismantled, and the two traction ropes 2 are respectively used for applying traction forces in different directions to the support cross rod 1 and enabling the traction forces to be reasonably balanced with the gravity of the support cross rod 1.
Traction forces in different directions are pre-applied to the supporting cross rod 1 through the first traction device and the second traction device respectively, the resultant force of the two traction forces and the gravity of the supporting cross rod 1 form stress balance, after the supporting cross rod 1 is cut and detached, the two pre-applied traction forces and the supporting cross rod 1 form stress balance, the supporting cross rod 1 can be prevented from swinging after being separated, the cutting and detaching process is more convenient, and the safety is higher.
In this embodiment, first draw gear includes the tower crane, and the tower crane is located the top that supports horizontal pole 1, second draw gear includes hoist engine 3. Further, the traction direction of one of the traction ropes 2 faces obliquely upward to avoid an obstacle right above the support cross bar 1; the other traction rope 2 is pulled in a direction toward the horizontal direction of the opposite side of the obliquely upper mirror image or the other obliquely upper side. In the present embodiment, the pulling direction of one of the two pulling ropes 2 is directed obliquely upward, and the other pulling rope 2 is directed horizontally. Specifically, a traction rope 2 with a traction direction facing to an obliquely upper direction is connected to the tower crane, and the winch 3 is connected with the traction rope 2 which is dragged towards a horizontal direction.
Through setting up the haulage rope 2 that a level was pull and the haulage rope 2 that an slope was pull, the haulage rope 2 that the level was pull provides horizontal traction force, and form the force balance with the horizontal separation of another haulage rope 2, the haulage rope 2 that the level was pull need not to receive the influence of the gravity that supports horizontal pole 1, consequently, can reduce hoist engine 3's power take off requirement widely, and because the direction of pulling of two haulage ropes 2 is the obtuse angle, when supporting horizontal pole 1 cutting separation, can reduce the inertia that supports horizontal pole 1, further promote the stability of interim support demolising the process.
In this embodiment the temporary support removal device further comprises a guide 4, the pulling rope 2 passing around the guide 4 and extending towards the second pulling device. The guide 4 may be provided at the same level as the support rail 1 such that the traction rope 2 between the support rail 1 and the guide 4 is pulled in a horizontal direction. The guide member 4 can be a support rod on the tower column bracket or a guide wheel fixed on the tower column.
Through setting up guide 4, make hoist engine 3 can set up in lower position, reduce the installation degree of difficulty, make simultaneously pull the haulage rope 2 that supports horizontal pole 1 part and keep pulling of horizontal direction, in addition, guide 4 provides the supporting role for haulage rope 2, has improved haulage rope 2 stability when applying traction force to supporting horizontal pole 1.
In this embodiment, the hoist 3 is installed on the bearing platform, and the bearing platform is further provided with a fixed pulley 5 for the traction rope 2 to wind, and the traction rope 2 connected with the hoist 3 extends to the guide 4 after bypassing the fixed pulley 5, and is connected with the support cross rod 1 through the guiding effect of the guide 4.
Through setting up fixed pulley 5, haulage rope 2 upwards extends again after 5 fixed pulleys, and hoist engine 3 avoids ascending pulling force, has further improved the security of demolising the in-process.
In this embodiment, two of the pulling ropes 2 are used to connect to two different pulling points on the circumference of the support rail 1. Specifically, two connecting pieces 11 are arranged on the support cross bar 1 along the circumferential direction of the support cross bar, and mounting holes 111 through which the traction ropes 2 can pass are formed in the connecting pieces 11. In other embodiments, two pull cords 2 may also be connected to the same pull point on the support rail 1.
Through connecting two haulage ropes 2 respectively on supporting two different traction points of 1 circumferencial direction of horizontal pole, make the atress that supports horizontal pole 1 disperse more, in addition, pull towards not equidirectional support horizontal pole 1 respectively as two haulage ropes 2, when supporting horizontal pole 1 cutting separation, support horizontal pole 1 and be difficult for taking place to rotate by a wide margin, further improved the stability of supporting horizontal pole 1 and demolising.
Referring to fig. 2, the invention further provides a temporary support dismantling method, which adopts the temporary support dismantling device. The method comprises the following steps:
the method comprises the following steps that two traction forces in different directions are pre-applied to a support cross rod 1 to be disassembled, so that the resultant force of the two traction forces and the gravity of the support cross rod 1 form stress balance; the different directions include an obliquely upper direction, and a horizontal direction or another obliquely upper direction toward an opposite side of the obliquely upper mirror image;
cutting two ends of the supporting cross rod 1;
adjusting the two traction forces to make the support cross bar 1 hang;
and adjusting the two traction forces to lower the support cross rod 1 to a specified position.
Further, in the step of pre-applying two traction forces in different directions to the support cross rod 1 to be detached, a tower crane is adopted to apply an obliquely upward traction force to the support cross rod 1, and a winch is adopted to apply a horizontal traction force to the support cross rod 1, wherein the horizontal traction force is towards the side opposite to the obliquely upward mirror image, so that the two traction forces and the gravity of the support cross rod 1 form stress balance.
Further, in the step of adjusting two traction forces to make the support cross rod 1 hang vertically, a tower crane is adopted to wind the traction rope 2 to pull the support cross rod to move upwards, and a winch is adopted to release the traction rope 2 synchronously, so that the support cross rod 1 is hung vertically under the tower crane.
In other embodiments, after cutting device cuts support horizontal pole 1, the tower crane can not lift support horizontal pole 1, only loosens support horizontal pole 1 through hoist engine 3, makes support horizontal pole 1 swing under the tower crane, makes haulage rope 2 be connected with the tower crane keep vertical state of drooping, controls tower crane and hoist engine 3 again and loosens haulage rope 2 in step.
Utilize tower crane and hoist engine 3 to pull supporting horizontal pole 1 respectively, demolising supporting horizontal pole 1 back, the tower crane lifts supporting horizontal pole 1, hoist engine 3 is in step loose and is supported horizontal pole 1, make supporting horizontal pole 1 remove to the tower crane under, support horizontal pole 1 through the tower crane pine and make it descend to ground, hoist engine 3 and tower crane form two traction to supporting horizontal pole 1, make supporting horizontal pole 1 difficult emergence swing at the vertical in-process that droops under, have improved the security.
In this embodiment, after the supporting cross rod 1 is cut off, preferably, the tower crane is adopted to lift and the winch 3 is released synchronously to swing the supporting cross rod 1 to the position under the tower crane, so that the method can greatly accelerate the straightening speed of the supporting cross rod 1 and improve the dismantling efficiency. In the embodiment, the support cross rod 1 is controlled to swing to the position right below the tower crane and then is descended, rather than being descended after the support cross rod 1 is cut off. On the one hand, keep one of them haulage rope 2 to be vertical state, another is the tilt state, compares two haulage ropes 2 and is the tilt state, and it is lower to keep the degree of difficulty that steadily descends, reduces the swing range of support horizontal pole 1 in descending process, makes its descending stability and security higher. On the other hand, because the power of tower crane is greater than the power of hoist engine 3, utilize the tower crane to come as main output, bear the most action of gravity of supporting horizontal pole 1, control supports horizontal pole 1 and steadily descends, and utilize hoist engine 3 to come as supplementary output, bear the effect of the small part of gravity of supporting horizontal pole 1, and for supporting horizontal pole 1 and providing the restraint of horizontal direction, make and support horizontal pole 1 and be difficult for taking place the swing at the descending in-process, it is more steady to make to support horizontal pole 1 to descend, the power requirement to hoist engine 3 also reduces to some extent simultaneously.
In summary, the scheme of the invention has the following advantages:
1. in the temporary support dismantling device, the first traction device and the second traction device respectively pre-apply traction forces in different directions to the support cross rod 1, the resultant force of the two traction forces and the gravity of the support cross rod form stress balance, and after the support cross rod 1 is cut and dismantled, the pre-applied two traction forces and the support cross rod 1 form stress balance, so that the support cross rod 1 can be prevented from swinging after being separated, the cutting and dismantling process is more convenient, and the safety is higher.
2. According to the temporary support dismantling method, the support cross rod 1 is respectively pulled by the tower crane and the winch 3, after the support cross rod 1 is dismantled, the support cross rod 3 is lifted by the tower crane, the winch 3 synchronously releases the support cross rod 1, the support cross rod 1 moves to the position right below the tower crane, the support cross rod 1 is released by the tower crane to fall to the ground, the winch 3 and the tower crane form a double-traction effect on the support cross rod 1, the support cross rod 1 is not easy to swing in the vertical falling process, and safety is improved.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a device is demolishd to interim support which characterized by: the device comprises a first traction device and a second traction device, wherein the first traction device and the second traction device are respectively connected with traction ropes for traction of a support cross rod to be disassembled, and the two traction ropes are respectively used for applying traction forces in different directions to the support cross rod and enabling the resultant force of the traction forces and the gravity of the support cross rod to form stress balance; the traction direction of one of the traction ropes faces obliquely upwards so as to avoid an obstacle right above the support cross bar; the traction direction of the other traction rope faces to the horizontal direction of the opposite side of the obliquely upper mirror image or the other obliquely upper side; the first traction device comprises a tower crane, and the traction rope is connected with the tower crane in a way that the traction direction faces the obliquely upper direction.
2. A temporary support removal device as claimed in claim 1, wherein: also included is a guide around which the pull-cord passes and extends toward the second pulling device.
3. A temporary support removal device as claimed in claim 1, wherein: the second traction device comprises a winch.
4. A temporary support removal device as claimed in claim 1, wherein: the two hauling ropes are respectively used for being connected with two different hauling points on the circumferential direction of the supporting cross rod.
5. A temporary support dismantling method is characterized by comprising the following steps:
the method comprises the following steps that two traction forces in different directions are pre-applied to a support cross rod to be disassembled, so that the resultant force of the two traction forces and the gravity of the support cross rod form stress balance; the different directions include an obliquely upper direction, and a horizontal direction or another obliquely upper direction toward an opposite side of the obliquely upper mirror image;
cutting two ends of the supporting cross rod;
adjusting the two traction forces to make the support cross bar hang;
and adjusting the two traction forces to enable the supporting cross rod to be lowered to a specified position.
6. The method of removing a temporary support according to claim 5, wherein: in the step of pre-applying two traction forces in different directions to the support cross rod to be detached, a tower crane is adopted to apply an obliquely upward traction force to the support cross rod, a winch is adopted to apply a horizontal traction force towards the side opposite to the obliquely upward mirror image to the support cross rod, and the two traction forces and the gravity of the support cross rod form stress balance.
7. The method of removing a temporary support according to claim 6, wherein: in the step of adjusting the traction force to enable the support cross rod to be suspended, a tower crane is used for winding a traction rope to pull the support cross rod to move upwards, and a winch is used for releasing the traction rope synchronously to enable the support cross rod to be suspended under the tower crane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911397510.6A CN110965480A (en) | 2019-12-30 | 2019-12-30 | Temporary support dismantling device and dismantling method |
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| CN201911397510.6A CN110965480A (en) | 2019-12-30 | 2019-12-30 | Temporary support dismantling device and dismantling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111593681A (en) * | 2020-06-12 | 2020-08-28 | 安徽省公路桥梁工程有限公司 | Pier stud retaining cast-in-place box girder ecological dismantling system and construction method |
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2019
- 2019-12-30 CN CN201911397510.6A patent/CN110965480A/en active Pending
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| RU2049038C1 (en) * | 1993-09-08 | 1995-11-27 | Московская государственная академия водного транспорта | Load gripping member roll-and-swing damper |
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