CN214993199U - Cradle pre-compaction tripod for rigid frame bridge construction - Google Patents
Cradle pre-compaction tripod for rigid frame bridge construction Download PDFInfo
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- CN214993199U CN214993199U CN202120822734.3U CN202120822734U CN214993199U CN 214993199 U CN214993199 U CN 214993199U CN 202120822734 U CN202120822734 U CN 202120822734U CN 214993199 U CN214993199 U CN 214993199U
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Abstract
The utility model discloses a cradle prepressing tripod for rigid frame bridge construction, wherein a plurality of first distribution beams are distributed on a cradle longitudinal beam in a first direction; a plurality of second distribution beams distributed over the first distribution beams in a second direction, the second direction being perpendicular to the first direction; a plurality of jacks are supported on the second distribution beam; the crossbeam is supported on a plurality of jacks in a second direction; the first triangular reaction frame is connected with the cross beam and the web plate, and the first embedded bracket is in through connection with the web plate at the first end position; the second triangular reaction frame is connected with the cross beam and the web plate, and the second embedded bracket is in through connection with the web plate at the third end position. The cradle prepressing tripod reduces material consumption, shortens construction period, reduces construction difficulty, and ensures high-altitude construction safety and accurate simulation stress.
Description
Technical Field
The utility model relates to a bridge string basket construction technical field that waters by overhang especially relates to a basket pre-compaction tripod is hung in continuous rigid frame bridge construction of high mound, large-span.
Background
In recent years, the number of continuous rigid frame bridges with large span and high piers in mountainous areas is gradually increased, and the suspended-basket suspended-casting construction technology is continuously applied and is gradually mature. After the hanging basket is installed, the stress of the whole hanging basket system and the operation condition of machine tools and equipment under various working conditions are checked through a pre-pressing method, the degree and the size of elastic deformation and inelastic deformation of the hanging basket are mastered, and absolute safety and normal operation of the system in the construction process are ensured.
The common cradle prepressing methods include three methods, namely a heavy object (sand bag, steel bar, precast block and the like) stacking method, a steel strand counter-pulling simulated load prepressing method and a water tank loading method, and a cradle main truss opposite-top prepressing method is also adopted.
The weight heaping method simulates the actual load distribution condition of a beam body by using weights such as sand bags or steel bars to heap on the hanging basket, and when the high pier hanging basket is pre-pressed, the construction working surface is small, the single hoisting time of the tower crane is long, the early preparation workload is large, the labor intensity for dismantling after the pre-pressing is finished is large, the construction speed is slow, the cost is high, and the influence of weather is large.
The steel strand counter-pulling simulation load prepressing method is characterized in that anchoring parts for bearing counter-force and steel strands are pre-buried in the construction process of a bearing platform, and distribution beams and jack counter-pulling steel strand simulation loads are arranged on a bottom basket after the assembly of a hanging basket is completed. An anchoring part bearing counter force needs to be pre-buried when the bearing platform is constructed; when the hectometer high-pier hanging basket is pre-pressed, the consumption of the steel strand is large, and the cost is high; under the influence of the jack stroke, multiple inverted jacks are needed to be inconvenient to construct under the general condition, the prestress is loosened to cause inaccurate loading, and potential safety hazards exist in the process of releasing after tensioning; the steel strand cannot be vertically arranged in the bearing platform due to the influence of the size of the bearing platform, a certain angle exists in arrangement, the application of counter-tension force is inaccurate, and meanwhile, a wedge block needs to be cushioned below the jack to ensure that the axis of the jack is overlapped with the steel strand, so that construction is inconvenient; if the jack is arranged in the position of the hanging strip of the upper cross beam before the hanging basket to simulate the stress condition of the hanging strip to carry out load loading, the method can only test the stress of the main truss of the hanging basket, cannot test the stress conditions of the bottom basket and the hanging strip of the hanging basket, does not test the assembling quality of the hanging basket and the connection condition of each part, has the condition of local omission, and cannot completely simulate the stress state of the formed hanging basket.
The water tank loading method is similar to the heavy object stacking method in that a water tank is manufactured on a hanging basket to simulate concrete load. The water tank loading method needs to manufacture the water tank, the requirements on the tightness of the water tank and the rigidity of the side wall of the water tank are high, the height of the manufactured water tank is larger than the height of a beam due to the fact that the density of water is smaller than that of concrete, and under the condition of high pier construction, water pumping is inconvenient, construction is time-consuming, and safety cannot be guaranteed.
The hanging basket main trusses of the hanging basket main truss single-piece opposite-top pre-pressing method are all of a profile steel welded structure, single-piece tests are carried out on the ground after stress conditions of all rod pieces and nodes are fully known through hanging basket calculation, load application is convenient, stress is clear, and safety of the hanging basket can be well tested. Hang basket main purlin and process in mill and accomplish and carry out nondestructive inspection to each component self defect of main purlin and welding seam quality and inspect qualified back, try to piece together the main truss, then place the I-steel sleeper beam on ground, piece together the main truss: the rear anchor is anchored by 6 phi 32mm finish-rolled deformed steel bars, a 300t jack is arranged at the front upper cross beam of one main truss, and the 2 phi 32mm finish-rolled deformed steel bars are oppositely pulled with the other truss cross beam through the shoulder pole beam. Deformation observation points are respectively arranged in the middle and the end of the front pull rod and in the middle of the front pressure rod; steel strainometers are arranged in the middle of the front pull rod, the middle of the front compression bar, the middle of the rear pull rod and the middle of the rear connecting rod, and stress states of the rod pieces are monitored. The prepressing method only tests the stress of the main truss of the hanging basket, does not test the stress conditions of the bottom basket of the hanging basket, the front and back transverse links and the hanging belt (rod), does not test the splicing quality of the hanging basket and the connection condition of each part, also has the condition of local omission, and cannot completely simulate the stress state of the formed hanging basket.
The prior art has obvious disadvantage when the high mound hangs basket pre-compaction, needs to occupy a large amount of places and machinery, and the work load is big, the pre-compaction cycle is long, the safe risk is big, construction quality is difficult to guarantee, can not simulate completely hang stress state etc. behind the basket shaping.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a basket pre-compaction tripod of hanging of rigid frame bridge construction has overcome high altitude construction, if the bridge floor apart from ground is the highest about 128m, the various unfavorable condition of bringing, if the construction site is less, hoisting machinery only has a type tower crane, the safety risk is high less to and the construction work volume is big, the pre-compaction cycle is long, can't simulate completely hang defects such as stress state after the basket shaping.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model discloses a hang basket pre-compaction tripod of rigid frame bridge construction includes:
the first distribution beams are distributed on the cradle longitudinal beam in the first direction;
a plurality of second distribution beams distributed over the first distribution beams in a second direction, the second direction being perpendicular to the first direction;
a plurality of jacks supported by the second distribution beam;
a cross beam supported on the plurality of jacks in the second direction;
a first triangular reaction frame connecting the beam and the web, the first triangular reaction frame comprising,
a first horizontal bar supported by the cross member,
a first vertical rod perpendicular to the first horizontal rod and connected to the web,
a first diagonal rod comprising a first end connected to the first vertical rod and a second end connected to the first horizontal rod,
the first embedded bracket is communicated with the web plate at the first end position;
a second triangular reaction frame connecting the beam and the web, the second triangular reaction frame comprising,
a second horizontal bar supported by the cross member,
a second vertical rod perpendicular to the second horizontal rod and connected to the web,
a second diagonal rod comprising a third end connected to the second vertical rod and a fourth end connected to the second horizontal rod,
and the second embedded bracket is in through connection with the web plate at the position of the third end.
In the cradle prepressing tripod for rigid frame bridge construction, a plurality of first distribution beams are arranged on a cradle longitudinal beam at intervals in a first direction, and a plurality of second distribution beams are arranged on the first distribution beams at intervals in a second direction.
In the cradle prepressing tripod for rigid frame bridge construction, a plurality of first distribution beams are arranged on a cradle longitudinal beam at equal intervals of 50cm in a first direction, and a plurality of second distribution beams are arranged on the first distribution beams at equal intervals of 50cm in a second direction.
In the cradle prepressing tripod for rigid frame bridge construction, the first distribution beam, the second distribution beam, the cross beam, the first triangular reaction frame and the second triangular reaction frame are in I-shaped structures.
In the cradle prepressing tripod for rigid frame bridge construction, the jack is a hydraulic jack.
In the cradle prepressing tripod for rigid frame bridge construction, a base plate is arranged between the jack and the cross beam.
In the cradle prepressing tripod for rigid frame bridge construction, the first vertical rod is connected with the web plate through a pull rod, and/or the second vertical rod is connected with the web plate through a pull rod.
In the cradle pre-pressing tripod for rigid frame bridge construction, the first embedded bracket is exposed to the web plate by 50cm, and/or the second embedded bracket is exposed to the web plate by 50 cm.
In the cradle pre-pressing tripod for rigid frame bridge construction, a plurality of layers of reinforcing steel bar net sheets are arranged in the web plate.
In the cradle pre-pressing tripod for rigid frame bridge construction, the mesh size of the reinforcing steel bar net piece is 10cm multiplied by 10 cm.
In the technical scheme, the utility model provides a pair of hanging basket pre-compaction tripod of rigid frame bridge construction has following beneficial effect: the method is characterized in that a reaction frame is used for hanging basket prepressing, only triangular reaction frames formed by splicing section steel, I-shaped steel of various types, a small amount of finish rolling deformed steel bars and reinforcing mesh sheets are used, and meanwhile, the triangular reaction frames, the embedded brackets, the distribution beams and the like can be spliced in advance and manufactured, compared with a heavy object stacking method and a water tank loading method, the material consumption is greatly reduced, the construction period is shortened, the construction difficulty is reduced, and the safety of high-altitude construction is ensured. Compared with a steel strand reverse-pulling simulation load pre-pressing method, the method has the advantages that the material consumption is reduced, the constraint is less under conditions, and the influence of the position and the verticality of the steel strand is avoided. The stress state of the formed hanging basket can be completely simulated by comparing the single-piece opposite-top prepressing method of the main truss of the hanging basket, and the stress conditions of all parts of the hanging basket are tested.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural diagram of a cradle prepressing tripod for rigid frame bridge construction according to an embodiment of the present invention;
fig. 2 is a schematic side view of a cradle prepressing tripod for rigid frame bridge construction according to an embodiment of the present invention;
in the figure: the hanging basket comprises a first distribution beam 1, a hanging basket longitudinal beam 2, a second distribution beam 3, a jack 4, a cross beam 5, a first triangular reaction frame 6, a web plate 7, a first horizontal rod 8, a first vertical rod 9, a first inclined rod 10, a first end 11, a second end 12, a first embedded bracket 13, a second triangular reaction frame 14, a second horizontal rod 15, a second vertical rod 16, a second inclined rod 17, a third end 18, a fourth end 19, a second embedded bracket 20, a base plate 21 and a pull rod 22.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, in one embodiment, in the cradle prepressing tripod for rigid frame bridge construction of the present invention,
the first distribution beams 1 are distributed on the cradle longitudinal beam 2 in the first direction;
a plurality of second distribution beams 3 distributed over said first distribution beams in a second direction, said second direction being perpendicular to said first direction;
a plurality of jacks 4, wherein the jacks 4 are supported on the second distribution beam 3;
a cross beam 5 supported on the plurality of jacks 4 in the second direction;
a first triangular reaction frame 6 connecting the cross beam 5 and the web 7, the first triangular reaction frame 6 comprising,
a first horizontal bar 8 supported by the cross beam 5,
a first vertical rod 9 perpendicular to the first horizontal rod 8 and connecting the web 7,
a first diagonal rod 10 comprising a first end 11 connected to said first vertical rod 9 and a second end 12 connected to said first horizontal rod 8,
the first embedded bracket 13 is communicated with the web 7 at the position of the first end 11;
a second triangular reaction frame 14 connecting the beam 5 and the web 7, the second triangular reaction frame 14 comprising,
a second horizontal bar 15, which is supported by the cross beam 5,
a second vertical rod 16 perpendicular to the second horizontal rod 15 and connecting the web 7,
a second diagonal bar 17 comprising a third end 18 connected to said second vertical bar 16 and a fourth end 19 connected to said second horizontal bar 15,
and the second embedded bracket 20 is communicated with the web plate 7 at the position of the third end 18.
In the preferred embodiment of the cradle prepressing tripod for rigid frame bridge construction, a plurality of first distributing beams 1 are arranged on the cradle longitudinal beam 2 at intervals in the first direction, and a plurality of second distributing beams 3 are arranged on the first distributing beams 1 at intervals in the second direction.
In the preferred embodiment of the cradle prepressing tripod for rigid frame bridge construction, a plurality of first distribution beams 1 are arranged on the cradle longitudinal beam 2 at an equal interval of 50cm in the first direction, and a plurality of second distribution beams 3 are arranged on the first distribution beams 1 at an equal interval of 50cm in the second direction.
In the preferred embodiment of the cradle prepressing tripod for rigid frame bridge construction, the first distribution beam 1, the second distribution beam 3, the cross beam 5, the first triangular reaction frame 6 and the second triangular reaction frame 14 are in an i-shaped structure.
In the preferred embodiment of the cradle prepressing tripod for rigid frame bridge construction, the jack 4 is a hydraulic jack 4.
In the preferred embodiment of the cradle prepressing tripod for rigid frame bridge construction, a base plate 21 is arranged between the jack 4 and the cross beam 5.
In the preferred embodiment of the cradle prepressing tripod for rigid frame bridge construction, the first vertical rod 9 is connected with the web 7 through a pull rod 22, and/or the second vertical rod 16 is connected with the web 7 through a pull rod 22.
In the preferred embodiment of the cradle pre-pressing tripod for rigid frame bridge construction, the distance of the first embedded bracket 13 exposing the web 7 is 50cm, and/or the distance of the second embedded bracket 20 exposing the web 7 is 50 cm.
In the preferred embodiment of the cradle pre-pressing tripod for rigid frame bridge construction, a plurality of layers of reinforcing steel bar meshes are arranged in the web plate 7.
In the preferred embodiment of the cradle pre-pressing tripod for rigid frame bridge construction, the mesh size of the reinforcing steel bar net piece is 10cm multiplied by 10 cm.
In order to further understand the utility model, as shown in fig. 2, in the process of binding the 0# steel bar, bracket holes of a first embedded bracket 13 and 2 pieces of PSB 785-grade phi 32 finish-rolled deformed steel bars are reserved at appropriate positions of the two side webs 7 of the 0# steel bar, the embedded length of the bracket holes is not less than 50cm, and the finish-rolled deformed steel bars are embedded by 1.5 m; arranging reinforcing steel bar meshes in the full section of the embedded part web 7, wherein the reinforcing steel bar meshes are arranged in three layers, the diameter of a reinforcing steel bar is phi 16mm, and the mesh size is 10cm multiplied by 10 cm; after concrete pouring is completed and the hanging basket is constructed to a certain stage, installing double-spliced I56b I-shaped steel embedded corbels, wherein the corbels are exposed by 50 cm; the first triangular reaction frame 6 and the second triangular reaction frame 14 are respectively formed by assembling and welding double-spliced I36b I-shaped steel, and are hoisted to the web 7 after ground splicing is completed. The first vertical rod 9 is fixedly connected with the first embedded bracket 13, further, full-weld connection is adopted, the weld joint is in the form of an equilateral right-angle fillet weld, the minimum leg weld size hf is more than or equal to 8mm, the second vertical rod 16 is fixedly connected with the second embedded bracket 20, further, full-weld connection is adopted, the weld joint is in the form of an equilateral right-angle fillet weld, the minimum leg weld size hf is more than or equal to 8mm, and the bottom of the triangular reaction frame is fixed by an anchoring distribution beam formed by splicing a finish-rolled deformed steel bar pull rod 22 and two I14I-shaped steels; two layers of I-shaped steel are longitudinally and transversely laid on the cradle longitudinal beam 2 or the bottom die to serve as a loading force transfer distribution beam of the jack 4, the bottom layer distribution beam is made of I20b working steel, the transverse bridge direction arrangement is carried out, the arrangement distance is 50cm, a double-spliced I40b I-shaped steel longitudinal distribution beam is arranged on the bottom layer distribution beam, the longitudinal bridge direction arrangement distance is the same as the distance between the jacks 4, the laying position of the distribution beam is the loading point of the jack 4, and the arrangement of the distribution beam refers to the distribution condition of the simulated load; each group of distribution beams is provided with 1 YCW500 type hydraulic jack 4, a beam 5 such as 3I 56b I-steel is arranged between the jack 4 and the triangular reaction frame to transfer load, a tripod horizontal rod is connected with the beam 5 by welding, and a 500 x 20mm steel base plate 21 is arranged between the jack 4 and the beam 5 during installation; and pre-pressing the hanging basket according to the concrete pouring sequence of the simulated suspension casting section, loading the hanging basket in a grading manner by using the method of bottom plate → web plate 7 → top plate, and measuring the elevation of each measuring point of the hanging basket after each stage of loading is finished for 1 h. After the load reaches 120%, measuring the elevation of each measuring point every 1h, and unloading when the average value of the settlement difference of the measuring points for 2 continuous times is less than 2 mm. Unloading is graded according to 120% → 100% → 0. Through the pressurization of high-pressure oil pump, 4 hydraulic jack 4 produce the jacking force to triangle reaction frame, and reaction frame produces perpendicular decurrent reaction force to jack 4 simultaneously, and this reaction force passes through 4 bases of jack and transmits for hanging basket end basket, and the load operating mode of basket construction is hung in the equivalent simulation, reaches the effect of hanging the basket pre-compaction.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. The utility model provides a cradle pre-compaction tripod of rigid frame bridge construction which characterized in that, it includes:
the first distribution beams are distributed on the cradle longitudinal beam in the first direction;
a plurality of second distribution beams distributed over the first distribution beams in a second direction, the second direction being perpendicular to the first direction;
a plurality of jacks supported by the second distribution beam;
a cross beam supported on the plurality of jacks in the second direction;
a first triangular reaction frame connecting the beam and the web, the first triangular reaction frame comprising,
a first horizontal bar supported by the cross member,
a first vertical rod perpendicular to the first horizontal rod and connected to the web,
a first diagonal rod comprising a first end connected to the first vertical rod and a second end connected to the first horizontal rod,
the first embedded bracket is communicated with the web plate at the first end position;
a second triangular reaction frame connecting the beam and the web, the second triangular reaction frame comprising,
a second horizontal bar supported by the cross member,
a second vertical rod perpendicular to the second horizontal rod and connected to the web,
a second diagonal rod comprising a third end connected to the second vertical rod and a fourth end connected to the second horizontal rod,
and the second embedded bracket is in through connection with the web plate at the position of the third end.
2. The cradle pre-pressing tripod for rigid frame bridge construction according to claim 1, wherein a plurality of first distribution beams are spaced apart from each other in a first direction on the cradle longitudinal beams, and a plurality of second distribution beams are spaced apart from each other in a second direction on the first distribution beams.
3. The cradle pre-pressing tripod for rigid frame bridge construction according to claim 2, wherein a plurality of first distribution beams are arranged on the cradle longitudinal beams at equal intervals of 50cm in the first direction, and a plurality of second distribution beams are arranged on the first distribution beams at equal intervals of 50cm in the second direction.
4. The cradle pre-pressing tripod for rigid frame bridge construction of claim 1, wherein the first distribution beam, the second distribution beam, the cross beam, the first triangular reaction frame and the second triangular reaction frame are I-shaped structures.
5. The cradle prepressing tripod for rigid frame bridge construction according to claim 1, wherein the jack is a hydraulic jack.
6. The cradle prepressing tripod for rigid frame bridge construction according to claim 1, wherein a base plate is provided between the jack and the beam.
7. The cradle pre-pressing tripod for rigid frame bridge construction according to claim 1, wherein the first vertical rod is connected to the web via a tie rod, and/or the second vertical rod is connected to the web via a tie rod.
8. The cradle prepressing tripod for rigid frame bridge construction according to claim 1, wherein the first embedded bracket exposes 50cm of the web, and/or the second embedded bracket exposes 50cm of the web.
9. The cradle pre-pressing tripod for rigid frame bridge construction according to claim 1, wherein a plurality of layers of reinforcing steel mesh sheets are arranged in the web.
10. The cradle pre-pressing tripod for rigid frame bridge construction according to claim 9, wherein the mesh size of the reinforcing steel mesh sheet is 10cm x 10 cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120822734.3U CN214993199U (en) | 2021-04-21 | 2021-04-21 | Cradle pre-compaction tripod for rigid frame bridge construction |
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| CN202120822734.3U CN214993199U (en) | 2021-04-21 | 2021-04-21 | Cradle pre-compaction tripod for rigid frame bridge construction |
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| CN214993199U true CN214993199U (en) | 2021-12-03 |
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