Large-span beam pouring supporting structure for soft foundation

Abstract

The utility model discloses a soft foundation geology large span beam pouring support structure which comprises two pier bearing platforms, two sets of support trusses, a horizontal steel pipe, a bearing beam, a bailey beam and a distribution beam, a pier is fixedly arranged on each pier bearing platform, a plurality of sets of constraint components are arranged on the piers at intervals in the vertical direction, the two support trusses are arranged oppositely, and the horizontal steel pipe is arranged between the two support trusses. Each group of supporting trusses comprises a plurality of triangular steel pipe frames which are arranged at intervals, the vertical section of each steel pipe frame is fixedly connected with the adjacent constraint component, the bottom of each steel pipe frame is fixedly connected with the pier bearing platform, and the plurality of horizontal steel pipes are arranged between the two supporting trusses in the transverse direction; the two ends of each horizontal steel pipe are fixedly connected with the tops of the adjacent steel pipe frames correspondingly, the multiple bearing beams are fixedly arranged on the horizontal sections of the steel pipe frames and the tops of the horizontal steel pipes at intervals, the bailey beams are fixedly arranged on the tops of the bearing beams in the transverse direction, and the multiple distribution beams are fixedly arranged on the tops of the bailey beams at intervals. And the plurality of distribution beams are used for supporting the scaffold.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and in particular relates to a soft-base geological large-span beam casting support structure. Background Art

[0002] Bridge engineering is an important part of the highway transportation network. During the construction process, the geological environment of each bridge project is diverse. When it is necessary to cross the soft foundation area, a beam-column spanning support platform such as Bailey beam is required as a supporting structure to provide support for the formwork project.

[0003] When the span of the cast-in-place beam is too large, there are two ways to provide support for the formwork project. First, do not set support between two adjacent piers, and use a Bailey beam with double-sided reinforcement to meet the bearing capacity and stiffness requirements, but the construction cost of this method is relatively high. Second, use an ordinary Bailey beam and set up a support system between two adjacent piers to support the Bailey beam, but it is necessary to set up a basic bearing support system for it in a weak foundation, which also leads to high construction costs. Utility Model Content

[0004] The utility model aims to provide a large-span beam casting support structure for soft foundation soil, so as to reduce the construction cost of the support structure erected to cross the soft foundation area.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A soft-base geological large-span beam casting support structure comprises a pier cap, a support truss, a horizontal steel pipe, a load-bearing beam, a Bailey beam and a distribution beam, wherein two pier caps are provided, each of which is fixedly provided with a bridge pier, and the bridge piers are provided with a plurality of groups of restraining members at intervals along the vertical direction, and the support trusses are provided in two groups, the two support trusses are arranged facing each other, and each group of support trusses comprises a plurality of triangular steel pipe frames arranged at intervals, and a reinforcement frame is fixedly connected between the inclined sections of adjacent steel pipe frames, and the vertical sections of each of the steel pipe frames are fixedly connected with the adjacent restraining members. The scaffolding is fixedly connected, and the bottom of each steel pipe rack is fixedly connected to the pier cap, the horizontal steel pipes are arranged in plurality and are arranged transversely between the two supporting trusses, the two ends of each horizontal steel pipe are respectively fixedly connected to the top of the adjacent steel pipe rack, the load-bearing beams are arranged in plurality and are fixedly arranged at intervals on the horizontal section of the steel pipe rack and the top of the horizontal steel pipes, the Bailey beams are fixedly arranged transversely on the top of the load-bearing beams, the distribution beams are arranged in plurality and are fixedly arranged at intervals on the top of the Bailey beams, and the plurality of distribution beams are used to support the scaffolding.

[0007] The principle and effect of this technical solution:

[0008] The steel pipe racks are hoisted in turn by using the hoisting device. After the steel pipe racks are vertically hoisted, the vertical sections of the steel pipe racks are fixedly connected to the restraining members, and the bottoms of the vertical sections of the steel pipe racks are fixedly connected to the pier caps. The reinforcement frames are fixedly connected between the inclined sections of the adjacent steel pipe racks. After the installation of the supporting trusses on the sides of the two piers close to each other is completed, a plurality of horizontal steel pipes of appropriate length are hoisted in turn between the two steel pipe racks according to the spacing between the two supporting trusses, and are fixedly connected to the tops of the two steel pipe racks. Subsequently, a plurality of load-bearing beams are fixedly arranged at intervals on the horizontal sections of the steel pipe racks and on the tops of the horizontal steel pipes, and Bailey beams are fixedly installed above the load-bearing beams. Finally, a plurality of distribution beams are fixedly arranged at intervals on the tops of the Bailey beams to provide support for erecting the scaffolding.

[0009] Through the above arrangement, two triangular steel pipe frames are set facing each other on the side where the two piers are close to each other, which effectively shortens the span of the crossing support platform. It is not necessary to set up an additional foundation between the two piers, nor to use double-layer reinforced Bailey beams, which reduces the amount of steel used in the construction of the support mechanism and the construction cost of the support structure erected to cross the soft foundation area.

[0010] In the utility model, multiple groups of prestressed cables are arranged transversely between the two bridge piers, and the two ends of the prestressed cables are respectively buried in the bottom of the two bridge piers. Through the above arrangement, the horizontal thrust transmitted to the bridge pier by the steel pipe frame can be overcome, the anti-lateral thrust capability of the bridge pier in the soft foundation area is improved, and the safety of the utility model is improved.

[0011] In the utility model, a plurality of groups of tension bolts are pre-embedded in the left and right side walls of the pier along vertical intervals, and the restraining member includes an I-beam arranged on the left and right sides of the pier along the front-to-back direction, and a square steel tube arranged on the front and rear sides of the pier along the left-to-right direction, the I-beam is fixedly connected with the tension bolts, and the two ends of the square steel tube are fixedly connected with the adjacent I-beams.

[0012] In the utility model, a steel plate strip matching with the pier is sleeved on the side of the vertical section of the steel pipe frame away from the pier, and both ends of the steel plate strip are fixedly connected to the I-beam by fastening bolts.

[0013] In the utility model, a plurality of angle steel groups are welded in sequence in the transverse direction on the top of the I-beam, and each angle steel group includes two first angle steels. A second angle steel is also arranged transversely on the side of the vertical section of the steel pipe rack away from the pier. The second angle steel abuts against the vertical section of the steel pipe rack, and the two ends of the second angle steel are respectively fixedly connected to one end of the two first angle steels. The second angle steel, the angle steel group and the I-beam form a trapezoidal fixed bracket.

[0014] The principle and effect of this technical solution:

[0015] The tension bolts are passed through the I-beams, the I-beams are fixed to the side walls of the piers, the steel pipe rack is vertically lifted, the vertical section of the steel pipe rack is abutted against the I-beams, the steel strips are sleeved on the side of the vertical section of the steel pipe rack away from the I-beams, and the fastening bolts are passed through the steel strips and the I-beams. By locking the fastening bolts, the vertical section of the steel pipe rack is fixedly connected to the restraining member, and the second angle steel, the angle steel group and the I-beams enclose the vertical section of the steel pipe rack in a trapezoidal fixed bracket.

[0016] Through the above arrangement, the purpose of fixedly connecting the vertical section of the steel pipe rack and the restraining member can be achieved, and the vertical section of the steel pipe rack and the restraining member are prevented from being separated, thereby further improving the safety of the utility model.

[0017] In the present invention, a plurality of connecting rods arranged in the transverse direction are arranged between the vertical section and the inclined section of the steel pipe frame and between the inclined sections of adjacent steel pipe frames. The above arrangement can further improve the stability of the supporting truss.

[0018] In the present invention, the top of the pier cap is pre-buried with connecting bolts, the bottom of the vertical section of the steel pipe rack is fixedly provided with a pad in the horizontal direction, and the pad is fixedly connected to the pier cap by connecting bolts. Through the above arrangement, the purpose of fixing the bottom of the steel pipe rack with the pier cap can be achieved, and the safety of the present invention is improved.

[0019] In the utility model, a plurality of brackets are fixedly arranged at the bottom of the vertical section of the steel pipe rack along its circumference, and the bottom of each bracket is fixedly connected to the pad. Through the above arrangement, the connection firmness between the vertical section of the steel pipe rack and the pad can be enhanced, and the safety of the utility model can be improved.

[0020] In the present invention, a prestress monitoring sensor is embedded in each pier cap. Through the above arrangement, the stress level can be monitored in real time, abnormal conditions of the structure can be discovered in time, and structural health monitoring and early warning can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the axonometric drawing of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is an exploded view of some parts of the utility model;

[0024] Figure 4 for Figure 3 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0026] The figure marks in the drawings of the specification include: 10, pier cap; 11, connecting bolt; 20, bridge pier; 21, tension bolt; 30, restraining member; 31, I-beam; 311, first angle steel; 312, second angle steel; 32, square steel pipe; 40, supporting truss; 41, steel pipe rack; 411, steel plate strip; 412, fastening bolt; 413, connecting rod; 414, pad; 415, corbel; 42, reinforcement frame; 50, horizontal steel pipe; 60, load-bearing beam; 70, Bailey beam; 80, distribution beam; 90, prestressed cable.

[0027] As attached Figure 1-4 As shown, the utility model discloses a soft-base geological large-span beam casting support structure, including a pier cap 10, a support truss 40, a horizontal steel pipe 50, a load-bearing beam 60, a Bailey beam 70 and a distribution beam 80, wherein the pier cap 10 is provided in two, each pier cap 10 is fixedly provided with a bridge pier 20, and the bridge pier 20 is provided with a plurality of groups of restraining members 30 at intervals along the vertical direction, the support truss 40 is provided in two groups, and the two support trusses 40 are arranged opposite to each other, and each group of support trusses 40 includes a plurality of triangular steel pipe frames 41 arranged at intervals, and a reinforcement frame 42 is fixedly connected between the inclined sections of adjacent steel pipe frames 41, and the vertical sections of each of the steel pipe frames 41 are connected to the adjacent restraining members. The components 30 are fixedly connected, and the bottom of each of the steel pipe frames 41 is fixedly connected to the pier cap 10. The horizontal steel pipes 50 are arranged in plurality and are arranged between the two supporting trusses 40 in the transverse direction. The two ends of each of the horizontal steel pipes 50 are respectively fixedly connected to the top of the adjacent steel pipe frames 41. The load-bearing beams 60 are arranged in plurality and are fixedly arranged at intervals on the horizontal sections of the steel pipe frames 41 and the tops of the horizontal steel pipes 50. The Bailey beams 70 are fixedly arranged at the tops of the load-bearing beams 60 in the transverse direction. The distribution beams 80 are arranged in plurality and are fixedly arranged at intervals on the tops of the Bailey beams 70. The plurality of distribution beams 80 are used to support the scaffolding, and the reinforcement frame 42 is X-shaped.

[0028] In this embodiment, a plurality of groups of prestressed cables 90 are arranged laterally between the two bridge piers 20, and both ends of the prestressed cables 90 are respectively buried in the bottom of the two bridge piers 20, and each horizontal steel pipe 50 and two steel pipe frames 41 fixedly connected thereto respectively constitute a support frame, and each support frame is equipped with a group of prestressed cables 90.

[0029] In this embodiment, the left and right side walls of the pier 20 are pre-embedded with multiple groups of tension bolts 21 along vertical intervals. The restraint member 30 includes an I-beam 31 arranged on the left and right sides of the pier 20 along the front-to-back direction, and a square steel tube 32 arranged on the front and rear sides of the pier 20 along the left-to-right direction. The I-beam 31 is fixedly connected to the tension bolts 21, and both ends of the square steel tube 32 are fixedly connected to the adjacent I-beams 31.

[0030] In this embodiment, a steel plate strip 411 matching with the pier 20 is sleeved on the side of the vertical section of the steel pipe frame 41 away from the pier 20 , and both ends of the steel plate strip 411 are fixedly connected to the I-beam 31 by fastening bolts 412 .

[0031] In this embodiment, a plurality of angle steel groups are welded in sequence in the transverse direction on the top of the I-beam 31, and each angle steel group includes two first angle steels 311. A second angle steel 312 is also transversely arranged on the side of the vertical section of the steel pipe rack 41 away from the pier 20. The second angle steel 312 abuts against the vertical section of the steel pipe rack 41, and the two ends of the second angle steel 312 are respectively fixedly connected to one end of the two first angle steels 311. The second angle steel 312, the angle steel group and the I-beam 31 form a trapezoidal fixed bracket.

[0032] In this embodiment, a plurality of connecting rods 413 arranged in the transverse direction are spaced apart between the vertical section and the inclined section of the steel pipe frame 41 and between the inclined sections of adjacent steel pipe frames 41 .

[0033] In this embodiment, a connecting bolt 11 is pre-buried at the top of the pier cap 10 , and a pad 414 is fixedly arranged at the bottom of the vertical section of the steel pipe frame 41 in the transverse direction. The pad 414 is fixedly connected to the pier cap 10 by the connecting bolts 11 .

[0034] In this embodiment, a plurality of corbels 415 are fixedly provided at the bottom of the vertical section of the steel pipe frame 41 along its circumference, and the bottom of each corbel 415 is fixedly connected to a pad 414 .

[0035] In this embodiment, a prestress monitoring sensor is embedded in each of the pier caps 10 .

[0036] The specific implementation process is as follows:

[0037] The steel pipe racks 41 are hoisted in turn by using the hoisting device. After the steel pipe racks 41 are vertically hoisted, the vertical sections of the steel pipe racks 41 are fixedly connected to the restraining members 30, and the bottoms of the vertical sections of the steel pipe racks 41 are fixedly connected to the pier caps 10. The reinforcement frames 42 are fixedly connected between the inclined sections of the adjacent steel pipe racks 41. After the installation of the support trusses 40 on the sides of the two piers 20 close to each other is completed, a plurality of horizontal steel pipes 50 of appropriate length are hoisted in turn between the two steel pipe racks 41 according to the spacing between the two support trusses 40, and are fixedly connected to the tops of the two steel pipe racks 41. Subsequently, a plurality of load-bearing beams 60 are fixedly arranged at intervals on the horizontal sections of the steel pipe racks 41 and the tops of the horizontal steel pipes 50, and Bailey beams 70 are fixedly installed above the load-bearing beams 60. Finally, a plurality of distribution beams 80 are fixedly arranged at intervals on the tops of the Bailey beams 70 to provide support for erecting the scaffold.

[0038] The tension bolts 21 are passed through the I-beam 31, and the I-beam 31 is fixed to the side wall of the pier 20. The steel pipe frame 41 is vertically lifted so that the vertical section of the steel pipe frame 41 abuts against the I-beam 31. The steel plate strip 411 is sleeved on the side of the vertical section of the steel pipe frame 41 away from the I-beam 31, and the fastening bolts 412 are passed through the steel plate strip 411 and the I-beam 31. By locking the fastening bolts 412, the vertical section of the steel pipe frame 41 is fixedly connected to the restraining member 30, and the second angle steel 312, the angle steel group and the I-beam 31 enclose the vertical section of the steel pipe frame 41 in a trapezoidal fixed bracket.

[0039] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical scheme or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical scheme of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A soft-base geological large-span beam casting support structure, characterized in that: include: Pier caps, wherein two pier caps are provided, each pier cap is fixedly provided with a bridge pier, and the bridge piers are provided with multiple groups of restraining members at intervals along the vertical direction; Support trusses, wherein the support trusses are arranged in two groups, the two support trusses are arranged facing each other, each group of support trusses includes a plurality of triangular steel pipe frames arranged at intervals, a reinforcement frame is fixedly connected between the inclined sections of adjacent steel pipe frames, the vertical section of each steel pipe frame is fixedly connected to the adjacent restraining member, and the bottom of each steel pipe frame is fixedly connected to the pier cap; Horizontal steel pipes, wherein the horizontal steel pipes are provided in plurality and are arranged transversely between the two support trusses, and the two ends of each horizontal steel pipe are respectively fixedly connected to the top of the adjacent steel pipe frame; A load-bearing beam, wherein the load-bearing beam is provided in plurality and fixedly arranged at intervals on the horizontal section of the steel pipe frame and the top of the horizontal steel pipe; A Bailey beam, wherein the Bailey beam is fixedly arranged on the top of the load-bearing beam in a transverse direction; The distribution beams are arranged in plurality and fixedly arranged at intervals on the top of the Bailey beam, and the plurality of distribution beams are used to support the scaffolding.

2. The soft-base large-span beam casting support structure according to claim 1, characterized in that: A plurality of groups of prestressed cables are arranged in the transverse direction between the two bridge piers, and two ends of the prestressed cables are respectively buried in the bottom of the two bridge piers.

3. The soft-base large-span beam casting support structure according to claim 2, characterized in that: The left and right side walls of the pier are pre-embedded with multiple groups of tension bolts at vertical intervals. The restraining member includes an I-beam arranged on the left and right sides of the pier along the front-to-back direction, and a square steel tube arranged on the front and rear sides of the pier along the left-to-right direction. The I-beam is fixedly connected to the tension bolts, and the two ends of the square steel tube are fixedly connected to the adjacent I-beams.

4. The soft-base large-span beam casting support structure according to claim 3, characterized in that: A steel plate strip matching with the pier is sleeved on the side of the vertical section of the steel pipe frame away from the pier, and both ends of the steel plate strip are fixedly connected to the I-beam by fastening bolts.

5. The soft-base large-span beam casting support structure according to claim 4, characterized in that: A plurality of angle steel groups are welded in sequence in the transverse direction on the top of the I-beam, and each angle steel group includes two first angle steels. A second angle steel is also arranged transversely on the side of the vertical section of the steel pipe rack away from the pier, and the second angle steel abuts against the vertical section of the steel pipe rack, and the two ends of the second angle steel are respectively fixedly connected to one end of the two first angle steels, and the second angle steel, the angle steel group and the I-beam form a trapezoidal fixed bracket.

6. The soft-base large-span beam casting support structure according to claim 2, characterized in that: A plurality of connecting rods arranged in the transverse direction are also arranged at intervals between the vertical section and the inclined section of the steel pipe frame and between the inclined sections of adjacent steel pipe frames.

7. The soft-base large-span beam casting support structure according to claim 2, characterized in that: The top of the pier cap is pre-buried with connecting bolts, and the bottom of the vertical section of the steel pipe frame is fixedly provided with a pad in the transverse direction, and the pad is fixedly connected to the pier cap by connecting bolts.

8. The soft-base large-span beam casting support structure according to claim 7, characterized in that: A plurality of corbels are fixedly arranged at the bottom of the vertical section of the steel pipe rack along its circumference, and the bottom of each corbel is fixedly connected to a pad.

9. The soft-base large-span beam casting support structure according to claim 2, characterized in that: Prestress monitoring sensors are embedded in each of the pier caps.

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