CN219342875U - Novel combined bracket structure of middle-small curve cast-in-situ box girder - Google Patents

Abstract

The utility model discloses a novel combined support structure of a middle-small curve cast-in-situ box girder, which comprises pile foundations, plain pile foundations and cast-in-situ box girders, wherein two plain pile foundations are arranged between two transversely adjacent pile foundations, a cast-in-situ box girder is assembled at the tops of the pile foundations and the plain pile foundations, a first supporting mechanism is assembled between the pile foundations and the cast-in-situ box girders, and the first supporting mechanism is used for carrying the cast-in-situ box girders on the basis of the pile foundations. According to the utility model, through the structural design of the first supporting mechanism and the second supporting mechanism, the problem that the support is locally unstable and collapses due to non-compact foundation treatment and uneven local stress is solved; the utility model is suitable for cast-in-situ box girder construction of medium and small radius curves and longitudinal slopes, and solves the problems of large consumption of support templates for construction, long construction period, great limitation on mountain bridges and high piers, and large field hardening of full framing, and only strip foundations or enlarged foundations are adopted at steel pipe columns.

Description

Novel combined bracket structure of middle-small curve cast-in-situ box girder

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a novel combined bracket structure of a middle-small curve cast-in-situ box girder.

Background

The box girder is a girder in bridge engineering, the inside is hollow, flanges are arranged on two sides of the upper part, the box-like structure is very large in size and mass, when in actual construction, the prefabricated box girder is assembled or the on-site cast-in-situ box girder construction is carried out according to the on-site situation, the steel plate box girder is a structural form commonly adopted in the engineering, the influence of the spacing of transverse baffles on the distortion of a simply supported steel box girder under the action of concentrated load is researched, the distortion effect and the rigid torsion effect of the simply supported steel box girder under the action of concentrated load are compared by arranging the transverse baffles in different numbers, the concentrated load is applied to the top end of a box girder along with the change curve of the number of the transverse baffles, and the calculation is carried out according to four working conditions of distortion, rigid torsion, symmetrical bending and eccentric load by adopting a load decomposition method;

the box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-situ box girder. The box girder combined bridge girder erection machine prefabricated in the independent place can be erected after the lower engineering is completed, so that the engineering progress can be accelerated, and the construction period can be saved; cast-in-situ box girders are mostly used for large continuous bridges. The materials are commonly divided into two types, namely a prestressed reinforced concrete box girder and a steel box girder. The prestressed reinforced concrete box girder is constructed on site, and besides longitudinal prestress, transverse prestress is arranged on some of the prestressed reinforced concrete box girders; the steel box girder is generally processed in a factory and then transported to a site for installation, and has an all-steel structure and a part of reinforced concrete pavement layer;

in the process of manufacturing the cast-in-situ box girder, the disturbance to the adjacent existing structure is large, the construction process is complicated, the construction period is long, meanwhile, the transverse slope and the longitudinal slope of the cast-in-situ box girder with the medium and small radius curves are inconvenient to control, the foundation is unevenly settled, and the risk of local instability collapse is reduced, so that the novel combined bracket structure of the cast-in-situ box girder with the medium and small curves is provided.

Disclosure of Invention

Based on the above, it is necessary to provide a novel combined bracket structure of a middle-small curve cast-in-situ box girder, and the structural design of the first supporting mechanism and the second supporting mechanism solves the problem that the bracket is locally unstable and collapses due to the fact that the foundation treatment is not compact and the local stress is uneven; the potential safety hazard with high danger solves the problems of large consumption of support templates for construction, long construction period, great limitation on bridges and high piers in mountainous areas and hardening of a large number of sites of full framing.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a novel integrated configuration of well and small curve cast-in-place box girder, includes pile foundation, plain pile foundation and cast-in-place box girder, transversely is adjacent two be provided with two plain pile foundations between the pile foundation, a cast-in-place box girder is equipped with at the top of pile foundation and plain pile foundation, be equipped with first supporting mechanism between pile foundation and the cast-in-place box girder, first supporting mechanism is used for bearing cast-in-place box girder on the basis of pile foundation, be equipped with second supporting mechanism between plain pile foundation and the cast-in-place box girder, second supporting mechanism is used for bearing cast-in-place box girder on the basis of plain pile foundation.

The first supporting mechanism comprises pile tie beams, pier columns and capping beams, wherein one pile tie beam is fixed between two adjacent pile foundations in the longitudinal direction, the pier columns are fixed at the tops of the pile foundations, one capping beam is fixed at the tops of two adjacent pier columns in the longitudinal direction, and the capping beams are fixed with the cast-in-situ box beams.

The first supporting mechanism further comprises a support cushion stone, and the support cushion stone is fixed at the top of the bent cap.

The bottom transverse slope of the inner side of the bent cap is 5%.

The second supporting mechanism comprises a strip foundation, steel pipe columns and a spandrel girder, wherein the strip foundation is fixed at the top of the plain pile foundation, the steel pipe columns are fixed at the top of the strip foundation, the spandrel girder is fixed at the top of the steel pipe columns, and the spandrel girder is connected with the cast-in-situ box girder in an assembling manner.

The top of a plurality of spandrel girders is fixed with a bailey girder, a plurality of distribution girders are uniformly distributed and fixed on the top of the bailey girder, and the distribution girders are fixed with the cast-in-situ box girder.

And a parallel 20 channel steel is fixed between two adjacent steel pipe columns in the transverse direction.

A plurality of disc buckle frames are uniformly distributed on the inner side of the cast-in-situ box girder.

The pier comprises a pier column, and is characterized in that anchor ears are fixed on the outer sides of the pier column, each anchor ear consists of a panel, a flange and a triangular plate, the flange is fixed at the bottom of the panel, two triangular plates are fixed at the two ends of the flange, and a plurality of through holes are uniformly distributed on the inner sides of the triangular plates.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, through the structural design of the first supporting mechanism and the second supporting mechanism, the problem that the support is locally unstable and collapses due to non-compact foundation treatment and uneven local stress is solved; the utility model is suitable for cast-in-situ box girder construction of medium and small radius curves and longitudinal slopes, and solves the problems of large consumption of support templates for construction, long construction period, great limitation on mountain bridges and high piers, and large field hardening of full framing, and only strip foundations or enlarged foundations are adopted at steel pipe columns.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic top view of the present utility model;

FIG. 3 is a schematic view of the structure of the disc buckle frame of the present utility model;

FIG. 4 is a schematic view of the connection structure of the pile foundation and pile tie beam of the present utility model;

FIG. 5 is a schematic diagram of the connection structure of the plain pile foundation and the cast-in-situ box girder of the utility model;

FIG. 6 is a schematic view of the connection structure of the pile foundation and the cast-in-situ box girder of the present utility model;

FIG. 7 is a schematic top view of the flange and triangle of the present utility model;

fig. 8 is a schematic side view of the hoop of the present utility model;

FIG. 9 is a schematic view of the connection structure of the panel, flange and triangle of the present utility model.

The labels in the figures are illustrated below:

1. pile foundation; 2. a plain pile foundation; 3. a cast-in-situ box girder; 4. pile tie beams; 5. pier column; 6. a capping beam; 7. a support pad stone; 8. a strip-shaped foundation; 9. a steel pipe column; 10. a spandrel girder; 11. a distribution beam; 12. bailey beam; 13. a hoop; 14. parallel-connected 20 channel steel; 15. a disc buckle frame; 16. a panel; 17. a flange; 18. triangle.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As described in the background art, in the prior art, in the process of manufacturing the cast-in-situ box girder, the disturbance to the adjacent existing structure is larger, the construction process is complicated, the construction period is longer, meanwhile, the transverse slope and the longitudinal slope of the cast-in-situ girder with small and medium radius curves are inconvenient to control, the foundation is unevenly settled, and the risk of local instability collapse is reduced.

In order to solve the technical problem, the utility model provides a novel combined bracket structure of a middle-small curve cast-in-situ box girder, which is applied to bridge construction.

According to the utility model, through the structural design of the first supporting mechanism and the second supporting mechanism, the problem that the support is locally unstable and collapses due to non-compact foundation treatment and uneven local stress is solved; the utility model is suitable for cast-in-situ box girder construction of medium and small radius curves and longitudinal slopes, and solves the problems of large consumption of support templates for construction, long construction period, great limitation on mountain bridges and high piers, and large field hardening of full framing, and only strip foundations or enlarged foundations are adopted at steel pipe columns.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

In the description of the present utility model, it should 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", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Example 1

Referring to fig. 1-9, a novel combined support structure of a middle-small curve cast-in-place box girder comprises a pile foundation 1, an element pile foundation 2 and a cast-in-place box girder 3, wherein two element pile foundations 2 are arranged between two transversely adjacent pile foundations 1, a cast-in-place box girder 3 is assembled at the tops of the pile foundations 1 and the element pile foundations 2, a first supporting mechanism is assembled between the pile foundations 1 and the cast-in-place box girder 3 and is used for carrying the cast-in-place box girder 3 on the basis of the pile foundations 1, a second supporting mechanism is assembled between the element pile foundations 2 and the cast-in-place box girder 3 and is used for carrying the cast-in-place box girder 3 on the basis of the element pile foundations 2;

the first supporting mechanism comprises pile tie beams 4, pier columns 5 and capping beams 6, wherein one pile tie beam 4 is fixed between two longitudinally adjacent pile foundations 1, the pier columns 5 are fixed at the tops of the pile foundations 1, one capping beam 6 is fixed at the tops of two longitudinally adjacent pier columns 5, the capping beams 6 are fixed with the cast-in-situ box beam 3, and the cast-in-situ box beam 3 can be supported through the mutual matching among the pile tie beams 4, the pier columns 5 and the capping beams 6, so that the cast-in-situ box beam 3 can be in a stable state after being weighted;

the first supporting mechanism further comprises a support cushion stone 7, and the support cushion stone 7 is fixed at the top of the bent cap 6;

the bottom transverse slope at the inner side of the bent cap 6 is 5%, so that the slope can be conveniently found for the later slope;

the second supporting mechanism comprises a strip foundation 8, steel pipe columns 9 and a spandrel girder 10, the strip foundation 8 is fixed at the top of the plain pile foundation 2, the steel pipe columns 9 are fixed at the top of the strip foundation 8, the spandrel girder 10 is fixed at the top of the steel pipe columns 9, the spandrel girder 10 is connected with the cast-in-situ box girder 3 in an assembled manner, and the pile tie beam 4, the pier column 5 and the capping beam 6 can be assisted to support the cast-in-situ box girder 3 through the mutual matching among the strip foundation 8, the steel pipe columns 9 and the spandrel girder 10, so that the stability and the bearing capacity of the structure are improved, and a stable foundation is laid for later construction;

a bailey beam 12 is fixed at the top of the plurality of spandrel girders 10, a plurality of distribution beams 11 are uniformly distributed and fixed at the top of the bailey beam 12, and the distribution beams 11 are fixed with the cast-in-situ box girder 3;

a parallel 20 channel steel 14 is fixed between two transversely adjacent steel pipe columns 9, and the connection firmness between the two transversely adjacent steel pipe columns 9 can be increased through the arrangement of the parallel 20 channel steel 14, so that the supporting safety of the whole device is improved;

the inner side of the cast-in-situ box girder 3 is uniformly provided with a plurality of disc buckling frames 15, and the rigidity of the structure can be increased through the arrangement of the disc buckling frames 15, so that the structure is more stable;

the anchor ear 13 is fixed on the outside of pier stud 5, anchor ear 13 comprises panel 16, flange 17 and set square 18, and the bottom of panel 16 is fixed with flange 17, and the both ends of flange 17 all are fixed with two set square 18, and a plurality of through-holes have all been seted up to the inboard of set square 18, and when pier stud 5 was gone up to anchor ear 13, the elevation position of anchor ear 13 was established to the safe construction ladder cage frame of setting up earlier, can vacate the space for setting up I-steel construction in advance like this, simultaneously provides convenience for the hoist and mount work. When the anchor ear 13 is hoisted, a scaffold board is firstly erected on the construction ladder cage to provide an operation platform for fastening anchor ear bolts, pretension force is applied to each high-strength bolt in parallel when the anchor ear 13 is fastened, namely, the bolts on each side are uniformly screwed to similar firmness, the joint surface of the anchor ear 13 and the pier column 5 is observed, and the pier column 5 is prevented from being biased due to uneven tightening of the high-strength bolts, so that construction hidden danger is caused. At the same time, the conditions of each plate surface and welding seams of the anchor ear 13 are also noted, and the conditions of deformation, cracking and the like are observed. The fastening bolts must be fastened in place. And checking the tightening force of the bolts, wherein the tightening force is 0.18KN.M according to the data standard required by the checking calculation, and the detection is carried out by adopting a torque wrench, in other embodiments, in order to improve the friction force between the pier stud 5 and the anchor ear 13, and meanwhile, the concrete surface of the pier stud 5 is protected, a layer of rubber pad with the thickness of about 6mm is arranged between the pier stud 5 and the anchor ear 13, and whether the anti-slip rubber in the anchor ear 13 is intact or not is required to be checked before the anchor ear 13 is installed.

Example 2

A construction method of a novel combined bracket structure of a middle-small curve cast-in-situ box girder is suitable for the novel combined bracket structure of the middle-small curve cast-in-situ box girder, and comprises the following steps:

s1: and (3) beam construction working procedures: two spandrel girders 10 are welded into a whole on the ground, then special clamping tools for steel hoisting are used for starting hoisting, the clamping tools are connected with a crane steel wire rope, during hoisting, the included angle between the steel wire rope and a steel plate is not suitable to be smaller than 60 degrees, I-steel falls on a sand box at the top of a steel pipe column 9, a circular steel plate with the diameter of 100cm is adopted as a flange plate at the top of the steel pipe column 9, 8 ribbed plates are arranged below the flange plate to be welded with the steel pipe column of the flange plate, the height of a welding line is not smaller than that of the plate thickness, the center line of a large beam is ensured to be positioned at the center of the steel pipe column 9, when the placement position deviates, a jack or a chain block is manually used for adjusting the position of the I-steel, and the center line of the large beam is ensured to be positioned at the center of the steel pipe column 9. After the I-steel at the upper part of the anchor ear 13 is installed and positioned, the finish rolling deformed steel bar with phi 32 is adopted to carry out opposite pulling on the I-steel at the two sides of the pier, and the arrangement mode is that 3 channels are arranged between the two piers and at the two sides of the pier, so that the I-steel is prevented from being displaced, and potential safety hazards are reserved;

s2: and (3) a bailey frame hoisting procedure: after the bailey beam 12 is hoisted in place, transverse connection is carried out on the bottom of the bailey beam 12 into a whole at intervals of 5m from the end part by adopting phi 20 steel bars, the bailey frames are firstly connected into a plurality of hoisting units on the ground, two adjacent bailey frames are connected into a whole, then a V-shaped clamping ring is used for fixing a steel wire rope on an upper chord of the bailey frame, and after the assembly is completed, the hoisting operation is started;

s3: positioning procedure: after S1 hoisting is completed, hoisting the distribution beams 11 one by one, at least 2 fixing points are arranged on each distribution beam 11, and during hoisting installation, the center distance of the distribution beams 11 is strictly controlled to ensure that the center point of the dish buckle bracket and the center line of the I-steel are positioned on the same line, and after the distribution beams 11 are installed, the distribution beams 11 and the bailey frame are fixed by using U-shaped bolts, and the erection method of the I-steel dish buckle bracket is the same as that of the floor dish buckle bracket.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (9)

1. The utility model provides a novel combination support structure of cast-in-place box girder of medium and small curve, its characterized in that includes pile foundation (1), plain pile foundation (2) and cast-in-place box girder (3), transversely adjacent two be provided with two plain pile foundations (2) between pile foundation (1), pile foundation (1) and plain pile foundation (2) top is equipped with cast-in-place box girder (3), be equipped with first supporting mechanism between pile foundation (1) and cast-in-place box girder (3), first supporting mechanism is used for carrying cast-in-place box girder (3) on pile foundation (1) basis, be equipped with second supporting mechanism between plain pile foundation (2) and cast-in-place box girder (3), second supporting mechanism is used for carrying cast-in-place box girder (3) on plain pile foundation (2) basis.

2. The novel combined bracket structure of the middle-small curve cast-in-situ box girder according to claim 1, wherein the first supporting mechanism comprises pile tie beams (4), pier columns (5) and cap beams (6), one pile tie beam (4) is fixed between two adjacent pile foundations (1), the pier columns (5) are fixed at the tops of the pile foundations (1), one cap beam (6) is fixed at the tops of two adjacent pile foundations (5), and the cap beams (6) are fixed with the cast-in-situ box girder (3).

3. The novel combined bracket structure of the middle-small curve cast-in-situ box girder according to claim 2, wherein the first supporting mechanism further comprises a support cushion stone (7), and the support cushion stone (7) is fixed at the top of the bent cap (6).

4. The novel combined bracket structure of the middle-small curve cast-in-situ box girder according to claim 2, wherein the bottom transverse slope of the inner side of the cover girder (6) is 5 percent.

5. The novel combined bracket structure of the middle and small curve cast-in-situ box girder according to claim 1, wherein the second supporting mechanism comprises a strip foundation (8), steel pipe columns (9) and a spandrel girder (10), the strip foundation (8) is fixed at the top of the element pile foundation (2), the steel pipe columns (9) are fixed at the top of the strip foundation (8), spandrel girders (10) are fixed at the top of the steel pipe columns (9), and the spandrel girder (10) is connected with the cast-in-situ box girder (3) in an assembling manner.

6. The novel combined bracket structure for the middle-small curve cast-in-situ box girder according to claim 5, wherein a bailey beam (12) is fixed at the top of a plurality of spandrel girders (10), a plurality of distribution beams (11) are uniformly distributed and fixed at the top of the bailey beam (12), and the distribution beams (11) are fixed with the cast-in-situ box girder (3).

7. The novel combined bracket structure of the middle-small curve cast-in-situ box girder according to claim 5, wherein a parallel 20 channel steel (14) is fixed between two adjacent steel pipe columns (9).

8. The novel combined bracket structure of the middle-small curve cast-in-situ box girder according to claim 1, wherein a plurality of disc buckle frames (15) are uniformly distributed on the inner side of the cast-in-situ box girder (3).

9. The novel combined bracket structure of the middle and small curve cast-in-situ box girder according to claim 2, wherein the outer sides of the pier columns (5) are respectively fixed with a hoop (13), each hoop (13) consists of a panel (16), a flange (17) and a triangular plate (18), the bottom of each panel (16) is fixed with the flange (17), two triangular plates (18) are respectively fixed at two ends of each flange (17), and a plurality of through holes are uniformly distributed on the inner sides of the triangular plates (18).

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