CN114164773B - Hanging basket structure - Google Patents
Hanging basket structure Download PDFInfo
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- CN114164773B CN114164773B CN202111537178.6A CN202111537178A CN114164773B CN 114164773 B CN114164773 B CN 114164773B CN 202111537178 A CN202111537178 A CN 202111537178A CN 114164773 B CN114164773 B CN 114164773B
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- longitudinal beam
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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
- E01D21/10—Cantilevered erection
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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
- E01D4/00—Arch-type bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The invention relates to a hanging basket structure which comprises a truss bearing system, a traveling system, a support reaction system and a thrust system, wherein the traveling system, the support reaction system and the thrust system are all arranged on the truss bearing system, the hanging basket structure also comprises at least two prestressed cables, all the prestressed cables are distributed at intervals along the transverse direction of the truss bearing system, one end of each prestressed cable is connected with the top of the longitudinal rear half part of the truss bearing system, and the other end of each prestressed cable is connected with the bottom of the longitudinal front end of the truss bearing system. It is through setting up two piece at least prestressed cable between the vertical rear half of truss bearing system and vertical front end for can use the top of the vertical rear half of truss bearing system as the fulcrum will hang the basket and indulge the front end and upwards pull-up, and then can improve the equilibrium that hangs the use of basket structure, when making the vertical length of increase string basket structure, the dead weight of hanging the basket structure of minimizing, make to adopt this string basket structure construction convenience with this, and reduce the cost.
Description
Technical Field
The invention relates to the technical field of bridge hanging basket cantilever construction, in particular to a hanging basket structure.
Background
In the construction process of the cast-in-place cantilever construction arch bridge built at home and abroad, the adopted hanging baskets are generally in the forms of a hydraulic portal frame, a triangular truss, a side truss type triangular truss, an inverted triangular truss and the like. And the length of the section that the above-mentioned hanging basket can once pour is generally about 5m, and the longest can reach 7.3m, still shorter still, leads to the cantilever of long span arch bridge to pour the section many, and the cantilever construction time is long. And aiming at areas with poor terrain (such as canyon areas, two side slope hoppers and the like) and bad climate regulation (such as 5 months in winter, the lowest temperature of-26.3 ℃, the maximum snow fall amount of 360cm per year, the minimum snow fall amount of 112cm, the short summer, the highest temperature of 27.2 ℃, large day and night temperature difference and strong ultraviolet rays), the construction period is limited, and when the span of the arch bridge is large, the existing cradle is difficult to construct and complete the arch bridge within the limited period. And if only increase present string basket structure length and pour segmental length once through increasing, just need the reinforcing to hang the basket structure, this can make the member of hanging the basket will increase a lot, hangs the basket dead weight and also with greatly increased, the construction is inconvenient, and cost-push.
Disclosure of Invention
The invention aims to: the festival section length that the basket single can pour to prior art is shorter, causes to be slow through the current basket construction of hanging, if only carry out increase in length to current basket structure and satisfy the increase of hanging basket single pouring festival section length, the member that has the basket of hanging will increase a lot, hangs the basket dead weight and also with greatly increased for it is inconvenient that the basket construction is hung in the adoption, and cost increase's problem provides a string basket structure.
In order to achieve the purpose, the invention adopts the technical scheme that:
a hanging basket structure comprises a truss bearing system, a traveling system, a support reaction system and a thrust system, wherein the traveling system, the support reaction system and the thrust system are all installed on the truss bearing system, the hanging basket structure further comprises at least two prestressed cables, all the prestressed cables are distributed along the transverse interval of the truss bearing system, one end of each prestressed cable is connected with the top of the longitudinal rear half part of the truss bearing system, and the other end of each prestressed cable is connected with the bottom of the longitudinal front end of the truss bearing system.
According to the hanging basket structure, the longitudinal rear half part of the truss bearing system is used for being hung on a constructed section, the longitudinal front half part of the truss bearing system is used for construction, and the rear half part is used as a bearing structure of the front half part. The number of the prestressed cables is at least two, and the prestressed cables can be determined according to actual conditions, and when the number of the prestressed cables is two, the prestressed cables need to be arranged on the two transverse sides of the hanging basket in a balanced mode. One end of each prestressed cable is connected with the top of the longitudinal rear half part of the truss bearing system, the other end of each prestressed cable is connected with the bottom of the longitudinal front end of the truss bearing system, the longitudinal front end of the cradle structure can be upwards pulled by taking the top of the longitudinal rear half part of the truss bearing system as a fulcrum, and the balance of the cradle structure during use can be further improved, so that the number of rods for enhancing the strength of the cradle structure can be reduced on the premise that the length of the cradle structure is the same as that of the existing cradle structure, the dead weight of the cradle structure is further reduced, the cradle is more convenient to use, and the use cost can be reduced; and the vertical length of the hanging basket structure is increased, and the dead weight of the hanging basket structure is reduced as much as possible, so that the hanging basket structure is convenient to construct, the cost is reduced, and the construction period can be shortened.
Preferably, the longitudinal included angle between the prestressed cable and the truss bearing system is 25-35 degrees, the prestressed cable has the best use effect, and the longitudinal front end of the truss bearing system can be pulled up best through the longitudinal rear end of the truss bearing system.
Preferably, the truss bearing system comprises a main truss and cantilever corbels transversely arranged on two sides of the lower part of the main truss, and the upper part of the main truss is arranged between two arch ribs;
the walking system comprises two cross arms, the two ends of each cross arm are respectively arranged on the top surfaces of the arch ribs, the two ends of each cross arm are respectively provided with a walking wheel, and the two cross arms are arranged on the rear half part of the main truss.
Aiming at the double-arch rib bridge, the existing construction mode is that two hanging baskets are used for construction in a matched mode, the two hanging baskets are hung on two arch ribs respectively, the mode needs the matched construction of the two hanging baskets, and the construction is inconvenient. This scheme adopts the truss bearing system that the corbel of encorbelmenting that main truss and main truss lower part both sides transversely set up constitutes, main truss upper portion is used for arranging in between two arch ribs, forms the support to the corbel of encorbelmenting of main truss lower part both sides for the corbel of encorbelmenting of both sides can be under construction to the arch rib that corresponds respectively, the basket structure in this scheme promptly can be used for constructing two arch ribs simultaneously, compare in every arch rib of current two arch ribs and all need a basket to be under construction, construct two arch ribs simultaneously through the basket structure in this scheme, its structure is simpler, it is more convenient to construct.
And the top of the rear half part of the truss bearing system of the hanging basket structure is provided with two cross arms, the two ends of the two cross arms are respectively provided with a travelling wheel, and the travelling wheels can move along the longitudinal movement of the top surfaces of the arch ribs correspondingly, so that the two cross arms can move along the longitudinal movement of the arch ribs and can bear the truss bearing system. In the process of constructing the arch rib through the hanging basket structure, one cross arm drives the truss bearing system to move forwards, when a tie beam between two constructed arch ribs collides with the current cross arm or a buckling rope on the arch rib collides with the current cross arm, the other cross arm needs to be connected and then the previous cross arm needs to be removed, the other cross arm replaces the previous cross arm to be used as a temporary support, the other cross arm replaces the previous cross arm to drive the truss bearing system to move forwards, the position where the previous cross arm is connected with the truss bearing system is located in front of the tie beam or the buckling rope, the truss bearing system of the hanging basket structure finally reaches the construction position of the next arch rib segment in an alternating mode, the cross arm close to the longitudinal middle part of the truss bearing system is used as a main support for pouring the arch rib segment, and the arch rib segments at the corresponding positions of the two arch ribs are poured simultaneously by the cantilever corbels at the lower transverse two sides of the longitudinal front half part of the main truss. Two cross arms are arranged at the top of the rear half part of the truss bearing system of the cradle structure, so that the truss bearing system of the cradle structure for simultaneously constructing the double arch ribs can smoothly move forwards to the construction position of the next arch rib section.
Preferably, the tensioning end of the prestressed cable is located at one end of the rear half part connected with the main truss, so that tensioning operation is facilitated.
Preferably, the main truss comprises two truss sheets which are arranged oppositely;
the truss pieces comprise a first main longitudinal beam, a second main longitudinal beam and a third main longitudinal beam which are distributed from top to bottom, the front end and the rear end of the second main longitudinal beam respectively protrude out of the corresponding ends of the first main longitudinal beam, the rear end of the third main longitudinal beam is vertically aligned with the rear end of the first main longitudinal beam, the front end of the third main longitudinal beam is vertically aligned with the front end of the second main longitudinal beam, and a plurality of vertical braces and inclined braces are further connected between the first main longitudinal beam and the second main longitudinal beam and between the second main longitudinal beam and the third main longitudinal beam;
two between the corresponding erector strut node of purlin piece and correspond all through first stull connection between the bracing node.
The main truss with the structure is divided into three layers from top to bottom, and the first main longitudinal beam at the top layer is used for connecting the two cross arms, so that the truss bearing system can be stably hung between the arch rib sections of the constructed double arch ribs through any one cross arm, and the stable movement of the truss bearing system is realized; the second main longitudinal beam in the middle layer and the third main longitudinal beam in the bottom layer form the lower part of the main truss for connecting cantilever corbels transversely arranged at two sides, are positioned below the bottom surfaces of the arch rib sections of the constructed double arch ribs and are used for forming a stable supporting structure and constructing the arch rib sections of the double arch ribs. And first main longitudinal, second main longitudinal and third main longitudinal's three position relation for the rear end of main truss is the triangle-shaped structure, and the apex angle of triangle-shaped structure is located the vertical middle part of main truss, and the front end of main truss is the right trapezoid structure, and the layering division of main truss is worked a job rationally, and the restraint of each member is effectual, when making the realization that can be more clear and definite to the construction of two arch ribs, can also reduce the member quantity that the basket structure is used for strengthening intensity.
Preferably, the two cross arms are respectively arranged right above the first cross arm at the rear end of the first main longitudinal beam and right above the first cross arm close to the longitudinal middle of the main truss, and the prestressed cable is connected to the first cross arm below one of the cross arms.
With two cross arm settings directly over the first stull that corresponds, bearing capacity is better. The two cross arms are arranged in the above mode, so that the stress is stable and the forward movement of the truss bearing system is facilitated. And connecting the prestressed cable to the first cross arm below one of the cross arms, so that the use stability of the hanging basket structure is improved. When the prestressed cable is connected right above the first cross brace close to the longitudinal middle of the main truss, compared with the prestressed cable connected right above the first cross brace at the rear end of the first main longitudinal beam, the prestressed cable has larger prestress, but can better pull up the longitudinal front end of the truss bearing system through the longitudinal rear end of the truss bearing system. When the prestressed cable is connected to the position right above the first cross brace close to the longitudinal middle of the main truss, and the included angle between the prestressed cable and the first main longitudinal beam is 30 degrees, the external prestress efficiency is highest.
Preferably, the vertical supports of each truss sheet comprise four first vertical supports, the first main longitudinal beam, the second main longitudinal beam and the third main longitudinal beam are all connected with all the first vertical supports, the distance between every two adjacent first vertical supports of each truss sheet is 4000-4300mm, the front end of the second main longitudinal beam protrudes from the front end 3800-3900mm of the first main longitudinal beam, and the rear end of the second main longitudinal beam protrudes from the rear end 4000-4100mm of the first main longitudinal beam.
By adopting the truss sheet structure, under the condition that the longitudinal length of the truss bearing system is about 20m, the increment of the rod pieces of the hanging basket structure can be greatly reduced, the dead weight increment of the hanging basket structure is reduced, and the construction of the hanging basket structure is more convenient. And the longitudinal length of the truss bearing system is set to be about 20m, so that the single-construction length of the cradle structure is greatly increased, the construction times can be reduced, the construction period is shortened, and the truss bearing system can be applied to certain projects with shorter construction periods.
Preferably, the thrust system is arranged at the joint of the first vertical support and the second main longitudinal beam, which is closest to the rear end of the second main longitudinal beam, so that the thrust effect can be better realized, and the stable use of the cradle structure is facilitated.
Preferably, the thrust reaction system includes a thrust wheel provided at a junction between the rear end of the second main longitudinal beam and the second diagonal brace, and the thrust wheel is configured to roll on a lower surface of the arch rib.
A reverse wheel is arranged at the joint of the rear end of the second main longitudinal beam and the second inclined strut, the reverse reaction of the cradle structure can be better realized, the front end of the truss bearing system is prevented from declining, and the cradle structure is more stable to use. The reverse supporting wheels are used for rolling on the lower surfaces of the arch ribs and are matched with the walking cross arms and the main cross arms, so that the truss bearing system can stably move forwards along the arch ribs.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the cradle structure, the longitudinal rear half part of the truss bearing system is used for being hung on a constructed section, the longitudinal front half part of the truss bearing system is used for construction, the rear half part is used as a bearing structure of the front half part, and at least two prestressed cables are arranged between the top of the longitudinal rear half part of the truss bearing system and the bottom of the longitudinal front end, so that the longitudinal front end of the cradle structure can be upwards pulled by taking the top of the longitudinal rear half part of the truss bearing system as a fulcrum, the balance of the use of the cradle structure can be improved, the number of rods of the cradle structure for enhancing strength can be reduced, the self weight of the cradle structure can be reduced on the premise that the length of the cradle structure is the same as that of the existing cradle structure, the use of the cradle is more convenient, and the use cost can be reduced; and the hanging basket structure can reduce the dead weight of the hanging basket structure as much as possible while increasing the longitudinal length of the hanging basket structure, so that the hanging basket structure is convenient to construct, the cost is reduced, and the construction period can be shortened.
2. Adopt the truss bearing system that the corbel of encorbelmenting that main truss and main truss lower part both sides transversely set up constitutes for hanging the basket structure and can be used for constructing two ribs simultaneously, compare every rib in current two ribs and all need a string basket to be under construction, construct two ribs simultaneously through hanging the basket structure in this scheme, it is more convenient that its construction. The top of the rear half part of the truss bearing system of the cradle structure is provided with two cross arms, and the truss bearing system of the cradle structure finally reaches the construction position of the next arch rib section in an alternative mode, so that the problem that the cross arms close to the longitudinal middle part of the truss bearing system cannot drive the truss bearing system to move forwards due to the construction obstruction of a buckle cable or a lanyard on an arch rib is avoided, and the truss bearing system of the cradle structure with two arch ribs can be constructed to move forwards to the construction position of the next arch rib section smoothly.
3. The main truss is divided into three layers from top to bottom, and a first main longitudinal beam at the top layer is used for connecting two cross arms, so that the truss bearing system can be stably hung between arch rib sections of constructed double arch ribs through any one cross arm, and the stable movement of the truss bearing system is realized; the second main longitudinal beam in the middle layer and the third main longitudinal beam in the bottom layer form the lower part of the main truss for connecting cantilever corbels transversely arranged at two sides, are positioned below the bottom surfaces of the arch rib sections of the constructed double arch ribs and are used for forming a stable supporting structure and constructing the arch rib sections of the double arch ribs. And first main longitudinal, second main longitudinal and third main longitudinal's three position relation for the rear end of main truss is the triangle-shaped structure, and the apex angle of triangle-shaped structure is located the vertical middle part of main truss, and the front end of main truss is the right trapezoid structure, and the layering division of main truss is worked a job rationally, and the restraint of each member is effectual, when making the realization that can be more clear and definite to the construction of two arch ribs, can also reduce the member quantity that the basket structure is used for strengthening intensity.
Drawings
FIG. 1 is a side schematic view of a cradle structure suspended from a constructed arch rib;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken at C-C of FIG. 1;
FIG. 5 is a cross-sectional view taken at D-D in FIG. 1;
FIG. 6 is a top view of the cradle structure hanging on the constructed arch rib;
fig. 7 is a top view of the pannier structure.
Icon: 1-a prestressed cable; 21-a main truss; 22-cantilever corbel; 211-a first main stringer; 212-a second main stringer; 213-a third main stringer; 214-a fourth main stringer; 221-a first vertical support; 222-a second vertical support; 231-a first sprag; 232-a second diagonal brace; 233-a third diagonal brace; 234-a fourth diagonal brace; 241-a first wale; 242-a second wale; 3-arch rib; 41-walking cross arm; 42-main cross arm; 5-a thrust system; 6-a thrust reaction system; 61-a counter wheel; 7-a hydraulic lifting device; 8-track.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a hanging basket structure, which is shown in fig. 1 and comprises a truss bearing system, a walking system, a support reaction system 6 and a thrust system 5, wherein the walking system, the support reaction system 6 and the thrust system 5 are all arranged on the truss bearing system, the hanging basket structure further comprises at least two prestressed cables 1, all the prestressed cables 1 are distributed at intervals along the transverse direction of the truss bearing system, one end of each prestressed cable 1 is connected with the top of the longitudinal rear half part of the truss bearing system, and the other end of each prestressed cable 1 is connected with the bottom of the longitudinal front end of the truss bearing system.
In the cradle structure of this embodiment, the longitudinal rear half of the truss bearing system is used for being hung on a constructed section, the longitudinal front half of the truss bearing system is used for construction, and the rear half is used as the bearing structure of the front half. The truss bearing system, the walking system, the support reaction system 6 and the thrust system 5 can be all of the existing structures.
The number of the prestressed cables 1 is at least two, which can be determined according to practical conditions, and when the number of the prestressed cables 1 is two, the prestressed cables should be arranged on the two transverse sides of the hanging basket in a manner of balancing as much as possible, as shown in fig. 7. The prestressed cable 1 can be made of epoxy sprayed steel strand wires and the like.
Besides, the longitudinal included angle between the prestressed cable 1 and the truss bearing system is properly set to be 25-35 degrees, so that the use effect of the prestressed cable 1 is the best, and the longitudinal front end of the truss bearing system can be pulled up through the longitudinal rear end of the truss bearing system best.
And the tensioning end of the prestressed cable 1 is suitably arranged at one end of the rear half part connected with the truss bearing system, so that the tensioning operation is convenient. As shown in fig. 1, one end of each prestressed cable 1 is connected to the top of the longitudinal rear half of the truss bearing system, and the other end is connected to the bottom of the longitudinal front end of the truss bearing system, so as to form an external prestressed connection, so that the longitudinal front end of the cradle structure can be pulled up by using the top of the longitudinal rear half of the truss bearing system as a fulcrum, and further the balance of the use of the cradle structure can be improved, so that the number of rods used for enhancing strength of the cradle structure can be reduced, the dead weight of the cradle structure can be reduced, the cradle can be used more conveniently, and the use cost can be reduced; and the vertical length of the hanging basket structure is increased, and the dead weight of the hanging basket structure is reduced as much as possible, so that the construction of the hanging basket structure is more convenient, the cost is reduced, and the construction period is shortened. The hanging basket structure can be a conventional hanging basket structure, and can also be a lengthening structure for the conventional hanging basket structure.
Example 2
The present embodiment provides a cradle structure capable of simultaneously constructing arch rib 3 sections of double arch ribs, as shown in fig. 1 to 7, comprising a truss load-bearing system, a traveling system, a thrust reaction system 6 and a thrust system 5, wherein the traveling system, the thrust reaction system 6 and the thrust system 5 are installed on the truss load-bearing system.
As shown in fig. 1 to 5, the truss load-bearing system comprises a main truss 21 and cantilevered corbels 22 transversely arranged on both sides of the lower part of the main truss 21, wherein the upper part of the main truss 21 is used for being placed between two arch ribs 3; adopt the truss bearing system that the corbel 22 of encorbelmenting that main truss 21 and both sides transversely set up constitutes, main truss 21 upper portion is used for arranging in between two arch ribs 3, form the support to the corbel 22 of encorbelmenting of the horizontal both sides in main truss 21 lower part for the corbel 22 of encorbelmenting that the horizontal setting in lower part both sides can be under construction to the arch rib 3 that corresponds respectively, the basket structure in this scheme promptly can be used for constructing two arch ribs simultaneously, compare and all need a basket to be under construction in every arch rib 3 of current two arch ribs, construct two arch ribs 3 simultaneously through the basket structure in this scheme, its structure is simpler, it is more convenient to construct.
In this embodiment, the truss piece includes a first main longitudinal beam 211, a second main longitudinal beam 212, and a third main longitudinal beam 213 that are distributed from top to bottom, the front and rear ends of the second main longitudinal beam 212 respectively protrude from the corresponding ends of the first main longitudinal beam 211, the rear end of the third main longitudinal beam 213 is vertically aligned with the rear end of the first main longitudinal beam 211, the front end of the third main longitudinal beam 213 is vertically aligned with the front end of the second main longitudinal beam 212, and a plurality of vertical braces and diagonal braces are further connected between the first main longitudinal beam 211 and the second main longitudinal beam 212, and between the second main longitudinal beam 212 and the third main longitudinal beam 213;
as shown in fig. 1, the vertical braces include a plurality of first vertical braces 221 and a second vertical brace 222; the diagonal braces include two first diagonal braces 231, one second diagonal brace 232, and a plurality of third diagonal braces 233. Specifically, the first main longitudinal beam 211, the second main longitudinal beam 212 and the third main longitudinal beam 213 are connected by a plurality of first vertical braces 221, one of the first vertical braces 221 is located at the rear end of the first main longitudinal beam 211, a second vertical brace 222 is connected between the front ends of the second main longitudinal beam 212 and the third main longitudinal beam 213, a second diagonal brace 232 is connected between the rear ends of the second main longitudinal beam 212 and the third main longitudinal beam 213, and a first diagonal brace 231 is connected between the corresponding ends of the first main longitudinal beam 211 and the second main longitudinal beam 212; the third diagonal brace 233 is connected between any two vertical brace nodes in the vertical brace node between the first vertical brace 221 and the first main longitudinal beam 211, the vertical brace node between the first vertical brace 221 and the second main longitudinal beam 212, and the vertical brace node between the first vertical brace 221 and the third main longitudinal beam 213;
as shown in fig. 2 to 4, first cross braces 241 are connected between the corresponding first main longitudinal beam 211 of the two truss sheets and the vertical brace node of the first vertical brace 221, between the corresponding second main longitudinal beam 212 and the diagonal brace node of the first diagonal brace 231, between the corresponding third main longitudinal beam 213 and the vertical brace node of the first vertical brace 221, and between the corresponding third main longitudinal beam 213 and the vertical brace node of the second vertical brace 222. In this embodiment, two except connecting through first stull 241 between the girder piece, still be equipped with the reinforcing bracing between two girder pieces, the reinforcing bracing between two girder pieces forms triangular supports with corresponding first stull 241, the better stability of being connected between two girder pieces of reinforcing. As shown in figures 2-3, two upward triangular supports are formed at the cross sections A-A and B-B and positioned at the upper parts of the truss sheets, so that the stress transmission directions of the upper triangular support and the lower triangular support are the same, and the stability is better.
In this embodiment, the main truss 21 with the above structure is divided into three layers from top to bottom, and the first main longitudinal beam 211 at the top layer is used for connecting two cross arms, so that the truss bearing system can be stably hung between the arch rib 3 sections of the constructed double arch ribs through any one cross arm, and stable movement of the truss bearing system is realized; the second main longitudinal beam 212 at the middle layer and the third main longitudinal beam 213 at the bottom layer form the lower part of the main truss 21 for connecting the cantilever corbels 22 transversely arranged at both sides, are positioned below the bottom surface of the arch rib 3 section of the constructed double arch rib, and are used for forming a stable supporting structure and constructing the arch rib 3 section of the double arch rib. And first main longitudinal beam 211, second main longitudinal beam 212 and third main longitudinal beam 213 three's positional relationship for the rear end of main truss 21 is the triangle-shaped structure, and the apex angle of triangle-shaped structure is located the vertical middle part of main truss 21, and the front end of main truss 21 is right trapezoid structure, and the layering of main truss 21 divides the worker rationally, and the restraint of each member is effectual, when making the realization that can be more clear and definite to the construction of two arch ribs, can also reduce the member quantity that the cradle structure is used for strengthening intensity.
As shown in fig. 2-4, the corbel comprises a plurality of second cross braces 242 and a plurality of fourth main longitudinal beams 214, one end of each second cross brace 242 is connected to the corresponding side of the truss sheet, a plurality of transversely arranged fourth diagonal braces 234 are connected between the joint of the first cross brace 241 and the second main longitudinal beam 212, the other end of the first cross brace and the corresponding third main longitudinal beam 213 of the truss sheet, and all the second cross braces 242 are connected through all the fourth main longitudinal beams 214. The bracket cooperates the lower part of main truss 21 for the lower part of truss bearing system is inverted trapezoid structure, and the structural atress after adaptation truss bearing system extension that can be better is favorable to carrying out the atress constraint to the longitudinal rear end of truss bearing system, and can avoid truss bearing system's design height too big, reduces the use of material and reduces truss bearing system dead weight.
In this embodiment, the traveling system includes two cross arms, two ends of each cross arm are respectively provided with two top surfaces of the arch rib 3, two ends of each cross arm are respectively provided with a traveling wheel, the traveling wheels can move along the longitudinal direction of the top surfaces of the corresponding arch ribs 3, and the two cross arms are both provided at the rear half part of the main truss 21.
In the process of constructing the arch ribs 3 through the hanging basket structure, one cross arm drives a truss bearing system to move forward, when a tie beam between two constructed arch ribs 3 collides with the current cross arm or a buckle cable on the arch rib 3 collides with the current cross arm, the other cross arm is required to be connected and then the previous cross arm is removed, the other cross arm replaces the previous cross arm to be used as a temporary support, the other cross arm replaces the previous cross arm to drive the truss bearing system to move forward, the position of the truss bearing system connected with the previous cross arm is positioned in front of the tie beam or the buckle cable, the truss bearing system of the hanging basket structure finally reaches the construction position of the next arch rib 3 section in an alternate mode, the cross arm close to the longitudinal middle part of the truss bearing system is used as a main support for pouring the arch rib 3 section, and the cantilever corbels 22 on the lower transverse two sides of the longitudinal front half part of the main truss 21 are simultaneously poured with the arch rib 3 sections at corresponding positions of the two arch ribs 3. Two cross arms are arranged at the top of the rear half part of the truss bearing system of the cradle structure, so that the truss bearing system of the cradle structure for simultaneously constructing the double arch ribs can smoothly move forwards to the construction position of the next 3-segment arch rib.
As shown in fig. 1, 6 and 7, the two cross arms are a walking cross arm 41 and a main cross arm 42 respectively, the walking cross arm 41 and the main cross arm 42 are detachably connected to the top surface of the main truss 21, two ends of the walking cross arm 41 and two ends of the main cross arm 42 are both used for correspondingly moving along the two arch ribs 3 longitudinally, the walking cross arm 41 and the main cross arm 42 are both arranged at the rear end of the main truss 21, and the main cross arm 42 is closer to the longitudinal middle of the truss load-bearing system than the walking cross arm 41.
In the process of constructing the arch rib 3 by the hanging basket structure, the main cross arm 42 drives the truss bearing system to move forward, when a tie beam between two constructed arch ribs 3 collides with the main cross arm 42 or a buckling rope on the arch rib 3 collides with the main cross arm 42, the walking cross arm 41 is required to be connected and then the main cross arm 42 is removed, the walking cross arm 41 replaces the main cross arm 42 to serve as a temporary support, the walking cross arm 41 replaces the main cross arm 42 to drive the truss bearing system to move forward, so that the position of the main cross arm 42 connected with the truss bearing system is positioned in front of the tie beam or the buckling rope, and the truss bearing system of the hanging basket structure finally reaches the construction position of the next arch rib 3 section in an alternate mode.
In this embodiment, the main cross arm 42 is used as a main support for casting the segment of the arch rib 3, so the design size of the main cross arm 42 is larger than that of the walking cross arm 41, the structures of the main cross arm 42 and the walking cross arm 41 are similar, and rollers are respectively arranged at the bottoms of the two ends, wherein a track 8 is laid on the top surface of the constructed double arch rib, and the main cross arm 42 and the walking cross arm 41 roll in cooperation with the rollers to standardize the forward moving path of the truss bearing system driven by the main cross arm 42 and the walking cross arm 41. After the main cross arm 42 is used as a support and the truss bearing system is fixed, the cantilever corbels 22 on the two transverse sides of the lower part of the main truss 21 are simultaneously poured with arch rib 3 sections at the same positions of two arch ribs 3. Through walking cross arm 41 and main cross arm 42, make the truss bearing system of the basket structure of hanging of constructing two arch ribs simultaneously can move forward to the construction position of next arch rib 3 festival section smoothly.
As a preferred embodiment, as shown in fig. 7, the walking cross arm 41 is disposed right above the first cross arm 241 at the rear end of the first main longitudinal beam 211, and the main cross arm 42 is disposed right above the first cross arm 241 near the longitudinal middle portion of the truss load-bearing system, so that both the walking cross arm 41 and the main cross arm 42 can be better stressed, and it is beneficial to drive the truss load-bearing system to move forward.
The hanging basket structure in the embodiment further comprises at least two prestressed cables 1, wherein all the prestressed cables 1 are distributed at intervals along the transverse direction of the truss bearing system, one end of each prestressed cable 1 is connected with the top of the longitudinal rear half part of the truss bearing system, the other end of each prestressed cable 1 is connected with the bottom of the longitudinal front end of the truss bearing system, and the top of the longitudinal rear half part of the truss bearing system is connected with the external prestress of the bottom of the longitudinal front end.
As shown in fig. 7, the anchoring end of the prestressed cable 1 is connected to the first cross brace 241 connected between the front end portions of the two third main longitudinal beams 213, and the tensioning end is connected to the first cross brace 241 connected between the rear half portions of the two first main longitudinal beams 211. The anchoring end of the prestressed cable 1 is connected with the front ends of the two third main longitudinal beams 213, so that the longitudinal front end of the truss bearing system can be integrally pulled up. The prestressed cable 1 is convenient to arrange through the first cross brace 241, so that the prestressed cable 1 can be better stressed, and the longitudinal front end of the truss bearing system can be pulled up through the longitudinal rear half part of the truss bearing system. The tensioning end of the prestressed cable 1 is arranged at the longitudinal rear end of the truss bearing system, so that the tensioning operation is facilitated.
Preferably, the included angle between the prestressed cable 1 and the first main longitudinal beam 211 is 25-35 degrees, most preferably 30 degrees, and the prestressed cable 1 has the best use effect and can best pull up the longitudinal front end of the truss bearing system through the longitudinal rear half part of the truss bearing system.
In this embodiment, the tension end of the prestressed cable 1 is connected to the first cross-brace 241 below the walking cross-arm 41 or the first cross-brace 241 below the main cross-arm 42, so as to better bear force. And when the tensioning end of the prestressed cable 1 is connected to the walking cross arm 41, compared with the condition that the tensioning end is connected to the main cross arm 42, the required prestress is larger, but the longitudinal front end of the truss bearing system can be better pulled up through the longitudinal rear end of the truss bearing system. When the tension end is connected to the main cross arm 42 and the included angle between the pre-stressed cable 1 and the first main longitudinal beam 211 is 30 °, the external pre-stress efficiency is the highest, as shown in fig. 1-2.
In this embodiment, taking the specific structure of fig. 1 to 7 as an example, referring to fig. 1, the number of the first vertical braces 221 of each truss is four, the first main longitudinal beam 211, the second main longitudinal beam 212, and the third main longitudinal beam 213 are all connected to all the first vertical braces 221, the four first vertical braces 221 are respectively connected to the corresponding first cross braces 241, the distance between two adjacent first vertical braces 221 of each truss is 4000 to 4300mm, the front end of the second main longitudinal beam 212 protrudes from the front end 3800 to 3900mm of the first main longitudinal beam 211, the rear end of the second main longitudinal beam 212 protrudes from the rear end 4000 to 4100mm of the first main longitudinal beam 211, the walking cross arm 41 is disposed directly above the first vertical brace 221 closest to the rear end of the second main longitudinal beam 212, and the main cross arm 42 is disposed directly above the first vertical brace 221 second closest to the rear end of the second main longitudinal beam 212.
The thrust system 5 is arranged at the joint of the first vertical support 221 and the second main longitudinal beam 212 closest to the rear end of the second main longitudinal beam 212, so that a thrust effect can be better realized, and the stability in use of the cradle structure is facilitated. The thrust system 5 mainly comprises shear resisting arms and the like and is used for offsetting the integral shearing force of the cradle structure.
The thrust reaction force system 6 comprises a thrust wheel 61, and the thrust wheel 61 has the functions of reaction force and guiding. The supporting and reversing wheel 61 is arranged at the joint of the rear end of the second main longitudinal beam 212 and the second inclined strut 232, and the supporting and reversing wheel 61 is used for rolling on the lower surface of the arch rib 3. The reverse supporting wheels 61 are arranged at the joint of the rear end of the second main longitudinal beam 212 and the second inclined strut 232, so that the reverse supporting effect of the cradle structure can be better realized, the front end of the truss bearing system is prevented from declining, and the cradle structure is more stable to use. The reverse wheels 61 are used for rolling on the lower surface of the arch rib 3, and are matched with the walking cross arm 41 and the main cross arm 42, so that the truss bearing system can stably move forwards along the arch rib 3. The reaction force system 6 generally requires a hook ball seat, a wedge-shaped reaction steel plate, and the like, and the wedge-shaped reaction steel plate is provided on the first cross brace 241.
Adopt above-mentioned purlin piece structure and set up thrust system 5, a reaction system 6 and traveling system, under the condition that makes truss bearing system's longitudinal length about 20m, the increase of the member that can greatly reduced hung the basket structure reduces the dead weight increase of hanging the basket structure for it is more convenient to adopt the construction of hanging the basket structure. And the longitudinal length of the truss bearing system is set to be about 20m, so that the single-construction length of the cradle structure is greatly increased, the construction times can be reduced, the construction period is shortened, and the truss bearing system can be applied to certain projects with shorter construction periods.
Besides, a working platform, a protection system and a template system are arranged on the cantilever corbels 22 on the two sides, and the conventional setting can be carried out when the double arch ribs are constructed. And the joint between two rods of the truss bearing system is further reinforced by a conventional stiffening plate, and the connecting mode can be bolt connection or welding and the like. The rod pieces of the truss bearing system refer to a main longitudinal beam, a vertical support, an inclined support, a cross support and the like. In this embodiment, the top of the truss bearing system is further provided with two hydraulic lifting devices 7, which can be used for lifting heavy objects, and facilitate pouring operation and the like. And one of the hydraulic lifting devices 7 is arranged at the rear end of the first main longitudinal beam 211, and the other hydraulic lifting device 7 is arranged at the front half part of the first main longitudinal beam 211 and close to the longitudinal middle part of the first main longitudinal beam 211, so that the whole longitudinal range of the cradle structure can be better covered, a balance effect can be achieved on a truss bearing system, the front end of the cradle structure is prevented from inclining downwards, and the whole cradle structure is more stable.
The hanging basket structure of this embodiment has solved the difficult problem of the cast-in-place construction of overlength festival section that traditional hanging basket can't realize, and cast-in-place length can reach 12 meters. The member bar of the truss bearing system is made of high-strength steel such as H-shaped steel, so that the self weight of the hanging basket structure is reduced, and the self weight of the hanging basket structure with the length of 20m can be reduced to 63T. Hang basket structure and can adapt to winter abominable climatic environment, safe risk greatly reduced. For arch bridge projects themselves, such as: the original design of the arch ring comprises 30 sections and 1 closure section, the longest section is 5.94m, the two sections are combined into one, the 30 pouring sections are reduced to 14 sections and 1 closure section, and the maximum pouring length of the arch ring is 11.79m. The arch ring pouring time is reduced by half compared with the original design scheme, so that the arch ring folding can be completed in an effective construction period, and the project can be finished in a contract construction period.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A hanging basket structure comprises a truss bearing system, a traveling system, a support reaction system (6) and a thrust system (5), wherein the traveling system, the support reaction system (6) and the thrust system (5) are all installed on the truss bearing system, and the hanging basket structure is characterized by further comprising at least two prestressed cables (1), all the prestressed cables (1) are distributed at intervals along the transverse direction of the truss bearing system, one end of each prestressed cable (1) is connected with the top of the rear longitudinal half part of the truss bearing system, and the other end of each prestressed cable (1) is connected with the bottom of the front longitudinal end of the truss bearing system;
the truss bearing system comprises a main truss (21) and cantilever corbels (22) which are positioned on two sides of the lower part of the main truss (21) and transversely arranged, wherein the upper part of the main truss (21) is used for being arranged between two arch ribs (3);
the walking system comprises two cross arms, the two ends of each cross arm are respectively arranged on the top surfaces of the arch ribs (3), the two ends of each cross arm are respectively provided with a walking wheel, and the two cross arms are arranged on the rear half part of the main truss (21).
2. Cradle structure according to claim 1, characterized in that the angle of the pre-stressed cables (1) with the longitudinal direction of the truss load-bearing system is 25-35 °.
3. A pannier structure according to claim 1, characterized in that the tensioned end of said prestressed cable (1) is located at the end of the rear half of the connection of said main truss (21).
4. Hanging basket structure according to claim 3, characterized in that said main truss (21) comprises two oppositely arranged truss pieces;
the truss sheets comprise a first main longitudinal beam (211), a second main longitudinal beam (212) and a third main longitudinal beam (213) which are distributed from top to bottom, the front end and the rear end of the second main longitudinal beam (212) respectively protrude out of the corresponding ends of the first main longitudinal beam (211), the rear end of the third main longitudinal beam (213) is vertically aligned with the rear end of the first main longitudinal beam (211), the front end of the third main longitudinal beam (213) is vertically aligned with the front end of the second main longitudinal beam (212), and a plurality of vertical braces and inclined braces are further connected between the first main longitudinal beam (211) and the second main longitudinal beam (212) and between the second main longitudinal beam (212) and the third main longitudinal beam (213);
two between the corresponding erector bracing node of purlin piece and correspond between the bracing node all connect through first stull (241).
5. Hanging basket structure according to claim 4, characterized in that two said cross arms are provided directly above said first cross arm (241) at the rear end of said first main longitudinal beam (211) and directly above said first cross arm (241) near the longitudinal middle of said main truss (21), respectively, said prestressed cable (1) being connected to said first cross arm (241) below one of said cross arms.
6. Cradle structure according to claim 5, characterized in that said prestressed cables (1) are connected to said first crossbrace (241) near the longitudinal middle of said main truss (21).
7. The hanging basket structure according to claim 6, wherein the vertical braces of each truss sheet comprise four first vertical braces (221), the first main longitudinal beam (211), the second main longitudinal beam (212) and the third main longitudinal beam (213) are connected with all the first vertical braces (221), the distance between two adjacent first vertical braces (221) of each truss sheet is 4000-4300mm, the front end of the second main longitudinal beam (212) protrudes the front end of the first main longitudinal beam (211) from 3800-3900mm, and the rear end of the second main longitudinal beam (212) protrudes the rear end of the first main longitudinal beam (211) from 4000-4100mm.
8. The hanging basket structure according to claim 7, wherein the thrust system (5) is provided at the intersection of the first vertical strut (221) and the second main longitudinal beam (212) nearest to the rear end of the second main longitudinal beam (212).
9. Pannier structure according to claim 7, characterized in that said reaction system (6) comprises a reaction wheel (61), said reaction wheel (61) being provided at the rear end of said second main longitudinal beam (212), said reaction wheel (61) being adapted to roll on the lower surface of said rib (3).
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| CN115162211B (en) * | 2022-09-07 | 2022-12-30 | 中铁十七局集团第五工程有限公司 | Cantilever pouring construction method for main arch ring of reinforced concrete arch bridge |
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| CN112681141A (en) * | 2020-12-17 | 2021-04-20 | 招商局重庆交通科研设计院有限公司 | Automatic movable hanging basket device for pouring concrete outside steel arch frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU717272B2 (en) * | 1997-07-29 | 2000-03-23 | Mark Eliott Fisher | Truss |
| CN101173503A (en) * | 2007-11-20 | 2008-05-07 | 中铁大桥局集团第二工程有限公司 | Three-point walking single cable face cable-dragging suspension basket |
| CN202247689U (en) * | 2011-09-23 | 2012-05-30 | 中铁十一局集团有限公司 | Lightweight basket adaptive to special sections |
| CN202280022U (en) * | 2011-10-09 | 2012-06-20 | 贵州路桥集团有限公司 | Inversely-hung triangular aslant-climbing hanging basket |
| CN204728222U (en) * | 2015-04-28 | 2015-10-28 | 徐智棋 | A kind of semi girder cast-in-place construction spreading Hanging Basket |
| CN105926464A (en) * | 2016-06-17 | 2016-09-07 | 贵州路桥集团有限公司 | Inverted hanging type trapezoid inclined climbing form traveler |
| CN111764305B (en) * | 2020-07-20 | 2022-02-11 | 四川省公路规划勘察设计研究院有限公司 | Main arch arching process for main arch single-rib staggered cantilever casting synchronous transverse connection |
| WO2022099548A1 (en) * | 2020-11-12 | 2022-05-19 | China Railway No.3 Engineering Group Co.Ltd | Method for installing steel tube arches |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112681141A (en) * | 2020-12-17 | 2021-04-20 | 招商局重庆交通科研设计院有限公司 | Automatic movable hanging basket device for pouring concrete outside steel arch frame |
Non-Patent Citations (1)
| Title |
|---|
| 马尚军 ; 张琦 ; .拱梁刚构组合体系桥提篮式钢箱拱施工技术.中外公路.(第02期),全文. * |
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