CN210561670U - Falsework and arch frame combined structure for cast-in-place concrete bridge - Google Patents
Falsework and arch frame combined structure for cast-in-place concrete bridge Download PDFInfo
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- CN210561670U CN210561670U CN201920817520.XU CN201920817520U CN210561670U CN 210561670 U CN210561670 U CN 210561670U CN 201920817520 U CN201920817520 U CN 201920817520U CN 210561670 U CN210561670 U CN 210561670U
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Abstract
The utility model relates to a bridge construction technical field specifically discloses a integrated configuration of falsework and bow member for cast in situ concrete bridge, including bow member and the falsework of connection on two limb mounds, the bow member is located the falsework top, the bow member forms fixed connection with the falsework, the falsework includes falsework horizontal pole and follows the falsework horizontal pole centrosymmetric falsework down tube, falsework horizontal pole level sets up, falsework horizontal pole both ends form fixed connection with two pier stud of two limb mounds respectively, falsework down tube one end fixed connection is on the falsework horizontal pole, the falsework down tube other end and one of them pier stud fixed connection of two limb mounds, falsework down tube slope is towards the pier stud. According to the scheme, the falsework is arranged, so that the problems of safety and high cost in the prior art of building the top transverse tie beam bottom die support are solved.
Description
Technical Field
The utility model relates to a bridge construction technical field specifically is a integrated configuration that is used for cast in situ concrete bridge's falsework and bow member.
Background
Along with the rapid development of our country's economy, high mound large-span bridge type is more and more, and to this kind of bridge, for guaranteeing the security, the bridge superstructure needs to adopt the continuous roof beam of prestressed concrete, and the pier of the continuous roof beam of prestressed concrete generally adopts two limb mounds (control two pier stud, and the top of two pier studs leans out), and the top and the middle part of two pier studs set up horizontal tie beam (including the top horizontal tie beam that is located the pier top and the middle part horizontal tie beam that is located the pier middle part).
When a middle transverse tie beam is built on the double-limb pier, a floor type bowl buckle support is generally adopted, an arch frame formed by overlapping steel structures is connected above the bowl buckle support, and the arch frame and the floor type bowl buckle support are used as a bottom mould support required by the forming of the transverse tie beam (after the bottom mould support is built, the bottom mould, the steel bar and the side mould are laid, concrete can be poured, and the transverse tie beam can be formed after the concrete is fixed). However, for the top transverse tie beam, if the bowl buckle support is still adopted, a higher bowl buckle support needs to be built, and on one hand, the safety of the whole supporting structure is reduced by building the higher bowl buckle support; on the other hand, more parts are needed to be consumed for building the overhigh bowl buckle support, the installation is more complicated, and both the material cost and the labor cost are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a integrated configuration of falsework and bow member for cast in situ concrete bridge to build the security problem and the problem with high costs that top transverse tie beam die block supporting exists among the solution prior art.
In order to achieve the above object, the basic scheme of the present invention is as follows:
a combined structure of falsework and arch frame for in-situ casting concrete bridge is composed of arch frame, falsework consisting of transverse cross-bar and oblique cross-bars symmetrical to each other along the cross-bar center, and the oblique cross-bar of falsework is horizontally arranged and is connected to two pillars of two-limb pier.
Compare the beneficial effect in prior art:
firstly, the falsework is arranged to replace a bowl buckle support in the prior art, compared with the prior art, parts of the falsework only comprise a falsework cross rod and a falsework inclined rod, and the bowl buckle support is formed by overlapping a plurality of scaffolds, so that the falsework is adopted, more parts are saved, the installation is simpler, the material cost is saved, and the labor cost is reduced.
Secondly, the falsework is fixedly connected with the double-limb piers, so that the connecting position of the falsework and the pier column can be selected to be close to the pier top, compared with the prior art, a bowl buckle support does not need to be erected from the ground, the stability is better, the safety is higher, and the falsework is fixedly connected with the double-limb piers, so that the bearing capacity is stronger.
Thirdly, the falsework is fixedly connected with the piers of the double-limb piers, which is equivalent to simultaneously pulling the two outwards-inclined piers towards the middle, thereby playing a role of oppositely pulling the two piers.
Furthermore, distribution beams are connected between the falsework cross bars and the arch center and are perpendicular to the falsework cross bars.
The distribution beam has the beneficial effects that the supporting force borne by the cross rod of the falsework can be uniformly distributed on each position of the falsework through the distribution beam, so that the stress of the falsework is uniform.
Further, the distribution beam comprises an end distribution beam and a middle distribution beam, and the strength of the end distribution beam is greater than that of the middle distribution beam.
The structure has the beneficial effects that because the bottom of the top transverse tie beam is arc-shaped, more concrete needs to be poured on the left side and the right side of the top transverse tie beam, the pressure on the arch frames close to the two ends of the pier stud in the structure of the scheme is larger, and the strength of the end distribution beam is necessarily larger than that of the middle distribution beam.
Further, the arch comprises an arch upper chord and an arch lower chord, the arch upper chord is attached to the bottom surface of the top transverse tie beam, and the arch lower chord is connected with the arch upper chord and the distribution beam.
The arch frame upper chord and the top transverse tie beam are attached to the bottom, so that the subsequent bottom die and the combined structure of the scheme can be attached more conveniently, and the bottom die can be supported better.
Furthermore, the arch center lower chord comprises an arch center cross rod, an arch center longitudinal rod and an arch center vertical rod, the arch center cross rod and the arch center longitudinal rod are vertically intersected, the arch center cross rod and the arch center longitudinal rod are fixedly connected with the distribution beam, one end of the arch center vertical rod is fixedly connected with the arch center upper chord, and the other end of the arch center vertical rod is fixedly connected with the intersection position of the arch center cross rod and the arch center longitudinal rod.
The arch center vertical rod has the beneficial effects that the arch center vertical rod is fixed at the intersection position of the arch center cross rod and the arch center longitudinal rod, so that the force applied to the arch center vertical rod can be simultaneously borne by the arch center cross rod and the arch center longitudinal rod, and the condition of uneven stress caused by the fact that only one part is stressed is avoided.
Furthermore, the arch center also comprises an arch center diagonal rod, wherein the upward inclined end of the arch center diagonal rod is fixedly connected with the upper chord of the arch center, and the downward inclined end of the arch center diagonal rod is fixedly connected with the lower chord of the arch center.
The combined structure has the beneficial effects that due to the existence of the arch frame inclined rod, the force applied to the whole combined structure in the scheme is further homogenized in space, so that the stress uniformity of the whole combined structure is better.
Furthermore, embedded parts are fixed on the pier columns through concrete, and the falsework is fixedly connected with the embedded parts. The falsework is fixedly connected with the embedded parts, and the embedded parts are cast on the pier stud through concrete, so that the falsework is equivalently inserted into the pier stud, the connecting length of the falsework and the pier stud is longer, and the connecting strength of the pier stud and the falsework is favorably improved.
Furthermore, the falsework adopts channel steel.
Furthermore, the distribution beam is made of I-shaped steel.
Furthermore, the arch center adopts I-shaped steel.
The method has the advantages that the falsework, the distribution beams and the arch center are all parts which are used in bridge construction, and the universality is high.
Drawings
Fig. 1 is a schematic structural diagram of a combined structure of a falsework and an arch frame when the falsework and the arch frame are installed on a pier stud according to an embodiment of the invention;
fig. 2 is a front view of a first embodiment of the present invention;
fig. 3 is a left side view of the first embodiment of the present invention in fig. 2;
fig. 4 is a front view of a second embodiment of the present invention;
fig. 5 is a left side view of the second embodiment of the present invention in fig. 4.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the truss framework comprises an arch upper chord 1, an arch lower chord 2, an arch cross rod 3, an arch vertical rod 4, an end distribution beam 5, a middle distribution beam 6, a falsework cross rod 7, a falsework inclined rod 8, a pier stud 9 and an arch inclined rod 10.
The embodiment is basically as shown in the attached figures 1 to 3:
the specific implementation process is as follows:
a falsework for cast-in-place concrete bridge and its combined structure are composed of arch frame, distributing beams and falsework connected to the piers with two limbs.
The arch comprises an arch upper chord 1 and an arch lower chord 2, the arch upper chord 1 is attached to the bottom surface of the top transverse tie beam, and the arch lower chord 2 is connected with the arch upper chord 1 and the distribution beam; the arch center lower chord 2 comprises an arch center cross rod 3, an arch center longitudinal rod and an arch center vertical rod 4 (wherein the arch center longitudinal rod is not marked), the arch center cross rod 3 is vertically intersected with the arch center longitudinal rod, the arch center cross rod 3 and the arch center longitudinal rod form a horizontal whole in a cross grid, the arch center cross rod 3 and the arch center longitudinal rod are welded with a distribution beam, the upper end of the arch center vertical rod 4 is welded with an arch center upper chord 1, the lower end of the arch center vertical rod 4 is welded at the intersection position of the arch center cross rod 3 and the arch center longitudinal rod, the arch center upper chord 1 adopts 14 # I-steel, and the arch center lower chord 2 adopts 10 # I-steel.
The distribution beam comprises an end distribution beam 5 and a middle distribution beam 6, the strength of the end distribution beam 5 is greater than that of the middle distribution beam 6, the end distribution beam 5 adopts a pair of 20B I-steel, and the middle distribution beam 6 adopts a single 20B I-steel.
The falsework comprises a falsework cross rod 7 and falsework inclined rods 8 which are symmetrical left and right along the center of the falsework cross rod 7, wherein the falsework cross rod 7 is horizontally arranged; embedded parts are fixed on the pier columns 9 through concrete, the left end and the right end of the falsework cross rod 7 are respectively welded with the embedded parts on the two pier columns 9, the upper end of the falsework diagonal rod 8 is welded on the falsework cross rod 7, the lower end of the falsework diagonal rod 8 is welded with the embedded parts on the pier columns 9, and the falsework cross rod 7 and the falsework diagonal rod 8 both adopt a pair of adhered 28B channel steel.
The specific implementation process comprises the following steps:
in the cast-in-place composite structure of the embodiment, an embedded part is fixed on a pier stud 9 through concrete pouring, a falsework is hoisted and installed by a tower crane or a crane (determined according to the height condition of the pier stud 9), a falsework cross rod 7 is installed firstly, then a falsework inclined rod 8 is installed, then a distribution beam, an arch frame cross rod 3, an arch frame longitudinal rod, an arch frame vertical rod 4 and an arch frame upper chord 1 are installed in sequence, and the installation of the bottom die support is completed after the arch frame upper chord 1 is installed. And then, laying a bottom die, installing reinforcing steel bars and installing side dies, and finally forming the top pier stud 9 and the top transverse tie beam into a whole in a concrete pouring mode.
In the embodiment, the falsework cross rod 7 and the falsework inclined rod 8 are arranged, so that the parts are simple, the mounting is convenient, the material cost is saved, and the labor cost is reduced.
The falsework of the embodiment is fixedly connected with the double-limb pier, so that the position of the embedded part on the pier stud 9 can be selected to be close to the pier top, so that the combined structure of the whole falsework and the arch frame has better stability and higher safety, and further has higher bearing capacity.
The scaffold of the present embodiment is fixedly connected with the double-limb pier, which is equivalent to pulling the two outwards-inclined piers 9 towards the middle at the same time, thereby playing a role of pulling the two piers 9.
Example two
Second embodiment is basically as shown in fig. 4 and 5, and the second embodiment is added with an arch diagonal 10 on the basis of the first embodiment, wherein the obliquely upward end of the arch diagonal 10 is welded with the upper arch chord 1, and the obliquely downward end of the arch diagonal 10 is welded with the lower arch chord 2 at the intersection of the arch cross bar 3 and the arch longitudinal bar.
The arch upright stanchion 4 supports the arch upper chord 1 to form a quadrangle, and the existence of the arch diagonal bar 10 enables the arch upper chord 1 to be supported by both the arch upright stanchion 4 and the arch diagonal bar 10, so that the arch upper chord 1 is supported by a triangle besides the quadrangle, and the stability of the triangle is stronger than that of the quadrangle, therefore, the arch upper chord 1 is supported more stably in the second embodiment, and the integral bearing force of the whole falsework and the arch is better.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A kind of composite construction used for falsework and bow member of the concrete bridge of the cast-in-place, including the bow member, characterized by that: the scaffold comprises a scaffold cross rod and scaffold diagonal rods which are symmetrical along the center of the scaffold cross rod, the scaffold cross rod is horizontally arranged, two ends of the scaffold cross rod are respectively fixedly connected with two pier columns of the double-limb piers, one end of the scaffold diagonal rod is fixedly connected to the scaffold cross rod, the other end of the scaffold diagonal rod is fixedly connected with one of the pier columns of the double-limb piers, and the scaffold diagonal rod inclines downwards to face the pier columns.
2. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 1, characterized in that: distribution beams are connected between the falsework cross bars and the arch frames and are perpendicular to the falsework cross bars.
3. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 2, characterized in that: the distribution beam comprises an end distribution beam and a middle distribution beam, and the strength of the end distribution beam is greater than that of the middle distribution beam.
4. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 2, characterized in that: the arch center comprises an arch center upper chord and an arch center lower chord, the arch center upper chord is attached to the bottom surface of the top transverse tie beam, and the arch center lower chord is connected with the arch center upper chord and the distribution beam.
5. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 4, characterized in that: the arch center lower chord comprises an arch center cross rod, an arch center longitudinal rod and an arch center vertical rod, the arch center cross rod and the arch center longitudinal rod are vertically intersected, the arch center cross rod and the arch center longitudinal rod are fixedly connected with the distribution beam, one end of the arch center vertical rod is fixedly connected with the arch center upper chord, and the other end of the arch center vertical rod is fixedly connected with the intersection position of the arch center cross rod and the arch center longitudinal rod.
6. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 4, characterized in that: the arch center also comprises an arch center diagonal rod, wherein the upward inclined end of the arch center diagonal rod is fixedly connected with the upper chord of the arch center, and the downward inclined end of the arch center diagonal rod is fixedly connected with the lower chord of the arch center.
7. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 1, characterized in that: an embedded part is fixed on the pier stud through concrete, and the falsework is fixedly connected with the embedded part.
8. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 4, characterized in that: the falsework adopts channel steel.
9. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 4, characterized in that: the distribution beam is made of I-shaped steel.
10. The composite falsework and arch frame structure for cast-in-place concrete bridges of claim 4, characterized in that: the arch frame is made of I-shaped steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920817520.XU CN210561670U (en) | 2019-05-31 | 2019-05-31 | Falsework and arch frame combined structure for cast-in-place concrete bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920817520.XU CN210561670U (en) | 2019-05-31 | 2019-05-31 | Falsework and arch frame combined structure for cast-in-place concrete bridge |
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| Publication Number | Publication Date |
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| CN210561670U true CN210561670U (en) | 2020-05-19 |
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| CN201920817520.XU Active CN210561670U (en) | 2019-05-31 | 2019-05-31 | Falsework and arch frame combined structure for cast-in-place concrete bridge |
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| CN (1) | CN210561670U (en) |
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