CN214656451U - Front supporting point composite hanging basket - Google Patents
Front supporting point composite hanging basket Download PDFInfo
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- CN214656451U CN214656451U CN202120674280.XU CN202120674280U CN214656451U CN 214656451 U CN214656451 U CN 214656451U CN 202120674280 U CN202120674280 U CN 202120674280U CN 214656451 U CN214656451 U CN 214656451U
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Abstract
The utility model discloses a basket is hung to preceding fulcrum combined type, including hanging basket, stretch-draw mechanism, traveling system, positioning system and anchoring system. The hanging basket is anchored on the poured beam section, and the stay cable and the hanging basket are connected by the tensioning mechanism to form a front fulcrum. The traveling system comprises a triangular truss, a traction mechanism and a rear traveling trolley, the triangular truss is anchored on a poured beam section, the traction mechanism is installed on the triangular truss, the traction mechanism can lift the front end of the cradle, the rear traveling trolley is anchored on the poured beam section, the rear traveling trolley and the traction mechanism are matched to achieve forward movement of the cradle, and the positioning system is used for achieving the initial positioning and position adjusting functions of the cradle. Above-mentioned preceding fulcrum combined type hangs basket does not adopt the leg structure, has effectively avoided the cable district to the spatial width restriction at roof beam edge, uses the drive mechanism of triangle truss to carry the front end of hanging the basket, makes the triangle truss participate in the atress, and the span deflection in the basket width direction that can significantly reduce is guaranteed the whole linear shape of girder.
Description
Technical Field
The utility model relates to a cable-stay bridge construction technical field, concretely relates to basket is hung to forward fulcrum combined type.
Background
In the existing front fulcrum hanging basket of the side cable surface wide cable-stayed bridge concrete beam, a leg hanging structure is mostly adopted, the lifting, the lowering and the walking of the hanging basket of the leg hanging structure are simple and convenient to operate, but the dynamic control of the elevation is inconvenient due to the large width of the cross section direction and the large mid-span deflection, and the linear control of a main beam is finally influenced.
The arrangement of the front supporting point hanging basket and hanging leg structure of the concrete beam of the side cable wide cable-stayed bridge needs to have a certain transverse bridge space, is greatly influenced by the position of the beam end of the stay cable and the width of the edge of the beam, and if the width is enough, a hanging leg type hanging basket can be adopted; if the width is limited, especially in the working condition of the space cable surface of the space curve cable tower, the position of the beam end of the stay cable and the space width of the edge of the beam frequently change, a composite hanging basket is needed.
In the side cable face wide width cable-stayed bridge concrete beam combined front supporting point hanging basket, a bridge floor walking system mostly adopts a triangular truss structure, the functions of lowering, walking and lifting the hanging basket are met, and in order to ensure the definition of a hanging basket stress system, the triangular truss does not generally participate in the stress of a beam section concrete pouring working condition, so that the problem of overlarge mid-span deflection in the width direction is caused.
SUMMERY OF THE UTILITY MODEL
Therefore, a front supporting point composite hanging basket is needed to be provided for solving the problems that the composite front supporting point hanging basket of the existing side cable surface wide cable-stayed bridge concrete beam is too high in mid-span flexibility in the width direction.
The utility model provides a basket is hung to preceding fulcrum combined type, includes and hangs basket, stretch-draw mechanism, traveling system, positioning system and anchor system:
the hanging basket is anchored on the poured beam section, and the stay cable and the hanging basket are connected by the tensioning mechanism to form a front fulcrum;
the traveling system comprises a triangular truss, a traction mechanism and a rear traveling trolley, the triangular truss is anchored on a poured beam section, the traction mechanism is mounted on the triangular truss, the traction mechanism can lift the front end of the hanging basket, the rear traveling trolley is anchored on the poured beam section, and the rear traveling trolley and the traction mechanism are matched to realize forward movement of the hanging basket;
the positioning system is used for realizing the initial positioning and position adjusting functions of the hanging basket, and the hanging basket, the triangular truss, the rear walking trolley and the positioning system are anchored on a poured beam section through the anchoring system.
In one embodiment, the cradle comprises a bearing platform and a template system, the rear end of the bearing platform is anchored on the poured segment, the traction mechanism lifts the front end of the bearing platform, and the template system is arranged on the bearing platform.
In one embodiment, the bearing platform comprises a main longitudinal beam, a front cross beam, a middle cross beam, a rear cross beam and a secondary longitudinal beam, the main longitudinal beam is anchored on a poured beam section, the tensioning mechanism is arranged at the front end of the main longitudinal beam, the front cross beam, the middle cross beam and the rear cross beam are sequentially connected between the two main longitudinal beams, and the two secondary longitudinal beams are connected between the two main longitudinal beams at intervals.
In one embodiment, a bearing surface is arranged at the front end of the main longitudinal beam to adapt to different angle changes of the stay cable.
In one embodiment, the hanging basket is anchored on a poured beam section through eight anchor points including two rear anchor points, two front anchor points and four middle cross beam anchor points, the rear anchor points are arranged at the rear end of the main longitudinal beam, the front anchor points are arranged in the middle of the main longitudinal beam, the middle cross beam anchor points are arranged on the middle cross beam, and one middle cross beam anchor point is arranged on each of two sides of each secondary longitudinal beam.
In one embodiment, the cradle further comprises an operating platform for constructors to move back and forth, and the operating platform is arranged on the bearing platform.
In one embodiment, the positioning system comprises a rear fulcrum and a thrust mechanism, the rear fulcrum is arranged at the rear end of the hanging basket to lift the hanging basket to a position for locking, and the thrust mechanism is anchored on a poured beam section to finely adjust the longitudinal positioning position of the hanging basket.
In one embodiment, a stress sensing and automatic control system is arranged on the deformed steel bar of the traction mechanism, and the elevation of the front end of the hanging basket is automatically controlled through stress state monitoring and real-time feedback in the dynamic process of pouring concrete on a beam section.
Above-mentioned preceding fulcrum combined type hangs basket does not adopt the shank-type structure, has effectively avoided the spatial width restriction of cable district to roof beam edge. Because the transverse span of the hanging basket is large, the span deformation is large after the front end of the hanging basket is loaded, and in the concrete pouring process of the main beam, the front end of the hanging basket is lifted by using a traction mechanism of the triangular truss, so that the triangular truss participates in the stress, the span deflection in the width direction of the hanging basket can be greatly reduced, and the integral linear shape of the main beam is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
FIG. 1 is a schematic structural view of a front support point composite hanging basket according to an embodiment;
FIG. 2 is a schematic structural view of the hanging basket of FIG. 1;
FIG. 3 is a top view of the front pivot composite pannier shown in FIG. 1;
fig. 4 is a side view of the front pivot composite pannier shown in fig. 1.
Reference numerals:
1-poured beam section, 2-stay cable, 10-hanging basket, 12-bearing platform, 121-main longitudinal beam, 121 a-bearing surface, 122-front cross beam, 123-middle cross beam, 124-rear cross beam, 125-secondary longitudinal beam, 14-template system, 161-rear anchor point, 162-front anchor point, 163-middle cross beam anchor point, 20-tensioning mechanism, 30-walking system, 32-triangular truss, 34-traction mechanism, 36-rear walking trolley, 40-positioning system, 42-rear pivot point and 44-thrust mechanism.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be embodied in many other forms than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 and 4, a front supporting point composite hanging basket in an embodiment is mainly suitable for a side cable surface wide cable-stayed bridge concrete beam. Specifically, the front supporting point composite hanging basket comprises a hanging basket 10, a tensioning mechanism 20, a walking system 30, a positioning system 40 and an anchoring system.
Referring to fig. 1 and 2, a hanging basket 10 is anchored to a poured beam section 1. In one embodiment, the hanging basket 10 includes a support platform 12 and a formwork system 14, the support platform 12 is a main structure of the hanging basket 10 for supporting the suspended casting load and the formwork system 14, and the formwork system 14 is disposed on the support platform 12.
Specifically, the load-bearing platform 12 includes a main longitudinal beam 121, a front cross beam 122, a middle cross beam 123, a rear cross beam 124, and a secondary longitudinal beam 125. The rear end of the main longitudinal beam 121 is anchored to the poured beam section 1 and the formwork system 14 is mounted on the main longitudinal beam 121. The front end of the main longitudinal beam 121 is provided with a bearing surface 121a which is adapted to the gait angle change of the stay cable 2 of each beam section.
The front cross beam 122, the middle cross beam 123 and the rear cross beam 124 are sequentially connected between the two main longitudinal beams 121, the front cross beam 122, the middle cross beam 123 and the rear cross beam 124 are parallel to each other, and the middle cross beam 123 is located between the front cross beam 122 and the rear cross beam 124. The secondary longitudinal beams 125 are connected between the two main longitudinal beams 121 at intervals, and the secondary longitudinal beams 125 connect the front cross member 122, the middle cross member 123, and the rear cross member 124.
Referring to fig. 3, on the basis of the above embodiment, the cradle 10 is further anchored on the poured beam segment 1 by eight anchor points including two rear anchor points 161, two front anchor points 162 and four middle beam anchor points 163. Wherein the rear anchor point 161 is disposed at the rear end of the main longitudinal beam 121 and the front anchor point 162 is disposed at the middle of the main longitudinal beam 121. The middle cross beam anchor points 163 are arranged on the middle cross beam 123, the four middle cross beam anchor points 163 are arranged at intervals, and one middle cross beam anchor point 163 is arranged on each of two sides of each of the secondary longitudinal beams 125.
In one embodiment, to ensure safety of the constructors, the cradle 10 further includes an operation platform, which is disposed on the bearing platform 12 and is mainly used for the constructors to move back and forth. Specifically, the operation platform is disposed at the front end of the main longitudinal beams 121, and the operation platform is correspondingly installed on each of the two main longitudinal beams 121.
Referring to fig. 1 again, the tension mechanism 20 connects the stay cable 2 and the hanging basket 10 to form a front pivot during the hanging casting construction of the hanging basket 10, so as to reduce the temporary internal force peak of the main beam during the construction. And after the suspension casting is finished, separating the stay cable 2 from the hanging basket 10 to realize cable force conversion. In one embodiment, the tension mechanism 20 is provided at the front end of the main side member 121 to form a front fulcrum.
Referring to fig. 4, the traveling system 30 is used to realize the no-load forward movement function of the cradle 10, and the traveling system 30 includes a triangular truss 32, a traction mechanism 34 and a rear traveling trolley 36. The triangular truss 32 is anchored on the poured beam section 1, after the prestress tensioning and cable force conversion of the poured beam section 1 are completed, the rear anchor of the triangular truss 32 is detached, the chain block is used for moving the triangular truss 32 forward by a section, and then the rear anchor of the triangular truss 32 is anchored, so that the forward movement of the triangular truss 32 is realized.
In other embodiments, a 20t hydraulic penetrating jack may be respectively disposed at the rear ends of the two sides of the triangular truss 32, a bundle of steel strands is used to fix the front ends of the steel strands to the beam ends, the other ends of the steel strands are fixed to the hydraulic jacks, and the triangular truss 32 is pulled to move forward by using the hydraulic jacks, so that labor is saved, convenience and rapidness are achieved, and the over-span efficiency of the cradle 10 is improved.
The traction mechanism 34 is mounted on the triangular truss 32, and the rear traveling trolley 36 is anchored on the cast beam section 1. The traction mechanism 34 can lift the front end of the hanging basket 10, and the traction mechanism 34 can be matched with the rear walking trolley 36 to realize the forward movement of the hanging basket 10. In particular, in this embodiment, the traction mechanism 34 lifts the front beam 122 of the load-bearing platform 12.
Furthermore, in order to more accurately control the mid-span deflection of the front end of the cradle 10, a stress sensing and automatic control system is arranged on a threaded line of the traction mechanism 34 at a front lifting point of the triangular truss 32, and the elevation of the front end of the cradle 10 is automatically controlled through stress state monitoring and real-time feedback in the dynamic process of beam section concrete pouring, so that the mid-span deflection of the cradle 10 in the width direction is greatly reduced, and the integral linear shape of the main beam is ensured.
The positioning system 40 is used for realizing the functions of initial positioning and fine-tuning positioning before the hanging basket 10 is poured. In one embodiment, the positioning system 40 includes a rear pivot 42 and a thrust mechanism 44. The rear fulcrum 42 is arranged at the rear end of the cradle 10, specifically at the tail of the main longitudinal beam 121, and the rear fulcrum 42 locks the cradle 10 after being lifted in place, so as to ensure that the vertical position of the cradle 10 does not deviate. The thrust mechanism 44 is anchored on the poured beam section 1, and has the function of finely adjusting the longitudinal positioning position of the cradle 10 and bearing the horizontal component force of the stay cable 2.
The anchoring system is used for anchoring each structure of the front pivot composite cradle, namely, the cradle 10, the triangular truss 32, the rear walking trolley 36 and the positioning system 40 are anchored on the poured beam section 1 through the anchoring system. In one embodiment, the anchoring system comprises two groups of main longitudinal beam front anchor rod groups, two groups of main longitudinal beam rear anchor rod groups, a triangular truss rear anchor rod group, a thrust mechanism anchor rod group, a middle cross beam anchor rod group and a rear walking trolley anchor rod group.
The front anchor rod group of the main longitudinal beam is used for anchoring the middle of the main longitudinal beam 121, the rear anchor rod group of the main longitudinal beam is used for anchoring the rear end of the main longitudinal beam 121, the rear anchor rod group of the triangular truss is used for anchoring the rear end of the triangular truss 32, the anchor rod group of the thrust mechanism is used for anchoring the thrust mechanism 44, the anchor rod group of the middle cross beam is used for anchoring the middle cross beam 123, and the anchor rod group of the rear walking trolley is used for anchoring the rear walking trolley 36.
The working principle of the front fulcrum combined type hanging basket is as follows:
1. cable force conversion: and after the cast beam section 1 is prestressed and tensioned, performing cable force conversion, converting the cable force on the hanging basket 10 to the cast beam section 1 to realize cable force conversion, and removing the tension rod to connect with the stay cable 2.
2. The triangular truss 32 moves forward: and (4) removing the rear anchor of the triangular truss 32, moving the triangular truss 32 forward by a segment by using a chain block, and anchoring the rear anchor of the triangular truss 32.
3. The hanging basket 10 is lowered: firstly, the thrust mechanism 44 is removed, then the traction mechanism 34 is positioned, the screw-thread steel is finish-rolled at the hanging point of the traction mechanism 34 and is anchored with the secondary longitudinal beam 125 of the hanging basket 10, and the middle cross beam anchor rod group is removed. 4 hoisting points of the main longitudinal beam front anchor rod group and the traction mechanism 34 hoisting point anchor rod group are used, 2 hydraulic jacks are configured at each hoisting point, 4 hoisting points are started simultaneously to lower the cradle 10, and the lowering height is 1.5 m.
4. The hanging basket 10 moves forward: after the hanging basket 10 is put down in place, the steel sling of the traction mechanism 34 is installed, and the finish rolling deformed steel bar is removed. And (4) positioning the rear walking trolley 36, anchoring the steel sling of the rear walking trolley 36, and removing the finish-rolled deformed steel bar of the front anchor rod group of the main longitudinal beam. The cradle 10 is advanced one segment at a time using the traction mechanism 34 and the rear traveling carriage 36 at 4 points while using the hydraulic jack.
5. System conversion: after the hanging basket 10 moves forward to the right position, system conversion is needed, the traction mechanism 34 finish-rolled deformed steel bar and the main longitudinal beam front anchor rod group finish-rolled deformed steel bar are installed, the traction mechanism 34 steel hanging strip and the rear walking trolley 36 steel hanging strip are removed, and the hanging basket 10 is subjected to stress conversion to 4 hanging point finish-rolled deformed steel bars.
6. The hanging basket 10 is lifted: after the system conversion is completed, the cradle 10 is lifted, and the cradle 10 is lifted to the position by using 4 lifting points of the front anchor rod group of the main longitudinal beam 121 and the lifting point anchor rod group of the traction mechanism 34.
7. Adjusting the elevation of the hanging basket 10: after hanging basket 10 and promoting to target in place, the staff carries out hanging basket 10 elevation adjustment according to the upright mould elevation data that monitoring unit provided, uses drive mechanism 34 to carry out the coarse adjustment to hanging basket 10 elevation, and the deviation is within 1cm, uses back fulcrum 42 to finely tune, and the adjustment targets in place back fulcrum 42, and the adjustment of hanging basket 10 elevation is accomplished.
8. Anchoring the hanging basket 10: after the elevation of the hanging basket 10 is adjusted in place, the rear anchor rod group and the middle cross beam anchor rod group of the main longitudinal beam are installed, and all anchoring systems are pre-tightened according to design requirements. After the pre-tightening is completed, the thrust mechanism 44 is locked to prevent the vertical displacement of the hanging basket 10.
9. Construction of the stay cable 2: after the elevation of the hanging basket 10 is adjusted in place, the tensioning mechanism 20 is used for measuring and positioning, then the stay cable 2 is used for pressing the anchor, and after the anchor is pressed, the stay cable 2 is initially tensioned, so that the subsequent reinforced concrete construction is completed.
Above-mentioned preceding fulcrum combined type hangs basket does not adopt the shank-type structure, has effectively avoided the spatial width restriction of cable district to roof beam edge. Because the transverse span of the hanging basket 10 is large, the span deformation of the front end of the hanging basket 10 is large after loading, and in the concrete pouring process of the main beam, the front end of the hanging basket 10 is lifted by using the traction mechanism 34 of the triangular truss 32, so that the triangular truss 32 participates in stress, the elevation of the front end of the hanging basket 10 is automatically controlled through stress state monitoring and real-time feedback, the span deflection of the hanging basket 10 in the width direction is greatly reduced, and the integral linear shape of the main beam is ensured.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (7)
1. The utility model provides a basket is hung to preceding fulcrum combined type which characterized in that, includes basket, straining device, traveling system, positioning system and anchor system:
the hanging basket is anchored on the poured beam section, and the stay cable and the hanging basket are connected by the tensioning mechanism to form a front fulcrum;
the traveling system comprises a triangular truss, a traction mechanism and a rear traveling trolley, the triangular truss is anchored on a poured beam section, the traction mechanism is mounted on the triangular truss, the traction mechanism can lift the front end of the hanging basket, the rear traveling trolley is anchored on the poured beam section, and the rear traveling trolley and the traction mechanism are matched to realize forward movement of the hanging basket;
the positioning system is used for realizing the initial positioning and position adjusting functions of the hanging basket, and the hanging basket, the triangular truss, the rear walking trolley and the positioning system are anchored on a poured beam section through the anchoring system.
2. The front-pivot composite pannier of claim 1, wherein the pannier comprises a load-bearing platform and a formwork system, wherein a rear end of the load-bearing platform is anchored to a poured segment, the traction mechanism lifts a front end of the load-bearing platform, and the formwork system is disposed on the load-bearing platform.
3. The front supporting point composite hanging basket according to claim 2, wherein the bearing platform comprises a main longitudinal beam, a front cross beam, a middle cross beam, a rear cross beam and a secondary longitudinal beam, the main longitudinal beam is anchored on a poured beam section, the tensioning mechanism is arranged at the front end of the main longitudinal beam, the front cross beam, the middle cross beam and the rear cross beam are sequentially connected between the two main longitudinal beams, and the two secondary longitudinal beams are connected between the two main longitudinal beams at intervals.
4. The front-fulcrum composite pannier of claim 3, wherein the front end of the main longitudinal beam is provided with a bearing surface to adapt to different angle changes of the stay cable.
5. The front-supporting-point composite hanging basket according to claim 3 is characterized in that the hanging basket is anchored on a poured beam section through eight anchor points including two rear anchor points, two front anchor points and four middle-transverse-beam anchor points, the rear anchor points are arranged at the rear end of the main longitudinal beam, the front anchor points are arranged in the middle of the main longitudinal beam, the middle-transverse-beam anchor points are arranged on the middle transverse beam, and one middle-transverse-beam anchor point is arranged on each of two sides of each of the secondary longitudinal beams.
6. The front supporting point composite hanging basket according to claim 2, further comprising an operating platform for a constructor to and fro, wherein the operating platform is arranged on the bearing platform.
7. The front pivot composite hanging basket according to claim 1, wherein the positioning system comprises a rear pivot and a thrust mechanism, the rear pivot is disposed at a rear end of the hanging basket to lock the hanging basket after it is lifted into position, and the thrust mechanism is anchored to a poured beam section to fine-tune a longitudinal positioning position of the hanging basket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120674280.XU CN214656451U (en) | 2021-04-01 | 2021-04-01 | Front supporting point composite hanging basket |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120674280.XU CN214656451U (en) | 2021-04-01 | 2021-04-01 | Front supporting point composite hanging basket |
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| CN214656451U true CN214656451U (en) | 2021-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477018A (en) * | 2022-03-04 | 2022-05-13 | 安徽省公路桥梁工程有限公司 | Longitudinal sliding and vertical lifting mechanism of large-tonnage guyed hanging basket main truss |
-
2021
- 2021-04-01 CN CN202120674280.XU patent/CN214656451U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477018A (en) * | 2022-03-04 | 2022-05-13 | 安徽省公路桥梁工程有限公司 | Longitudinal sliding and vertical lifting mechanism of large-tonnage guyed hanging basket main truss |
| CN114477018B (en) * | 2022-03-04 | 2023-11-21 | 安徽省公路桥梁工程有限公司 | Longitudinal sliding and vertical lifting mechanism of large-tonnage guy rope hanging basket main truss |
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