CN115821784B - Cantilever cap beam construction system and construction method - Google Patents
Cantilever cap beam construction system and construction methodInfo
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- CN115821784B CN115821784B CN202211630805.5A CN202211630805A CN115821784B CN 115821784 B CN115821784 B CN 115821784B CN 202211630805 A CN202211630805 A CN 202211630805A CN 115821784 B CN115821784 B CN 115821784B
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Abstract
The invention relates to a cantilever bent cap construction system and a construction method, belonging to the field of bridge construction, wherein the cantilever bent cap construction comprises a support rod, a lower layer support structure, a middle layer support structure and an upper layer support structure, wherein the support rod is used for penetrating through a pier; the lower layer supporting structure comprises two upper chords and two lower chords, the upper chords and the lower chords are parallel to each other and are horizontally arranged, the two lower chords are respectively arranged below the two upper chords, the two lower chords are supported by two ends of a supporting rod extending out of a pier, the lower chords support the upper chords, the middle layer supporting structure comprises a plurality of bailey frames, the bailey frames are parallel to each other and are arranged at intervals, any two adjacent bailey frames are connected with each other, the middle layer structure is rectangular, the middle layer supporting structure is sleeved with a pier and is supported on the lower layer supporting structure, the upper layer supporting structure is rectangular, and the upper layer supporting structure is sleeved with the pier and is supported on the middle layer supporting structure.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a cantilever bent cap construction system and a construction method.
Background
The bent cap refers to a cross beam arranged at the top of the bent pile pier for supporting, distributing and transferring the load of the upper structure. And arranging a beam of reinforced concrete or less reinforced concrete on the bridge pier or the row piles. The capping beam is a very important component of the bridge.
When the cantilever bent cap is constructed, a platform is required to be constructed on the bridge pier, and then construction is performed on the platform. In the prior art, one end of a platform is often connected with a pier, the other end of the platform is tensioned by a pull rope to fix the platform to the pier, but in the structure, the pull rope is soft, so that shaking can occur no matter the platform is built or after the platform is built, potential safety hazards exist, and the pull rope is complex and tedious in the process of building, and the working efficiency is low.
Disclosure of Invention
Aiming at the defects existing in the related art, the invention provides a cantilever bent cap construction system and a construction method, wherein a lower layer supporting structure is supported by a supporting rod, a middle layer supporting structure is supported by a lower layer supporting structure, an upper layer supporting structure is supported by a middle layer supporting structure, the whole construction system can be stably sleeved and fixed on a pier, and the lower layer supporting structure, the middle layer supporting structure and the upper layer supporting structure are sequentially sleeved with the pier, so that the technical problem of working efficiency existing in the prior art is solved.
The invention provides a cantilever bent cap construction system, which comprises:
the support rod is used for penetrating through the bridge pier;
The lower layer support structure comprises two upper chords and two lower chords, wherein the upper chords and the lower chords are parallel to each other and are horizontally arranged, and the two lower chords are respectively arranged below the two upper chords;
The middle layer support structure comprises a plurality of bailey frames which are parallel to each other and are arranged at intervals, and any two adjacent bailey frames are connected with each other;
the upper layer supporting structure is rectangular, and is sleeved with the bridge pier and supported on the middle layer supporting structure.
In the technical scheme, the support rod supports a lower-layer support structure, the lower-layer support structure supports a middle-layer support structure, the middle-layer support structure supports an upper-layer support structure, and the lower-layer support structure, the middle-layer support structure and the upper-layer support structure are arranged in a stacked manner, and are not made of soft materials, so that the structure is stable. And lower floor bearing structure, middle level bearing structure and upper strata bearing structure cover establish the pier, when the installation with lower floor bearing structure, middle level bearing structure and upper strata bearing structure cover establish in proper order the pier can, it sets up convenient and fast, improves work efficiency.
In some embodiments, the support rods have at least two, and the two support rods are parallel and located at the same height.
In the technical scheme, a plurality of supporting rods support the lower-layer supporting structure, so that the stability of the lower-layer supporting structure on the pier is further improved, and the overall stability of the cantilever bent cap construction system is improved.
In some embodiments, the support bar extends out of one end of the bridge pier and is provided with a support member, the support member comprises a pressing plate and a support plate, the support plate is horizontally arranged above the corresponding support bar, the pressing plate is fixed below the support plate, and a yielding groove for placing the support bar is formed in the pressing plate.
In the technical scheme, the support rod is connected with the lower chord member in the lower support structure through the support piece, so that the lower support structure is prevented from slipping on the support rod, and the overall stability of the structure is further improved.
In some embodiments, the upper support structure comprises a plurality of scaffolds and guardrails, the plurality of scaffolds are spliced to form a rectangular platform, and the guardrails are arranged along the edges of the platform to form an enclosure structure.
In the technical scheme, the scaffold is a standard component, and is convenient to purchase and install. The constructors are prevented from falling through the guardrails, so that the safety is further improved.
In some embodiments, the lower support structure further comprises a plurality of connecting rods, wherein the connecting rods are arranged between the upper chord member and the lower chord member, and two ends of the connecting rods are respectively connected with the upper chord member and the lower chord member.
In the technical scheme, the upper chord member and the lower chord member are supported by the connecting rod, so that construction is convenient, the height of the lower supporting structure is increased, the overall height of the cantilever hanging beam construction system is increased, and construction of the cantilever hanging beam on the top of the pier by personnel is convenient.
The invention also discloses a cantilever bent cap construction method, which is used for constructing the cantilever bent cap construction system, and comprises the following steps:
A supporting structure is established, wherein a plurality of through holes are formed in the bridge pier, and the supporting rods are penetrated in the through holes;
establishing a lower layer supporting structure, namely welding an upper chord, a lower chord and a connecting rod on the ground to form a structure;
A middle layer supporting structure is established, namely a plurality of bailey pieces are spliced on the ground to form a bailey frame, and a plurality of bailey frames are spliced to form a rectangular structure;
An upper layer supporting structure is established, namely a plurality of scaffolds are spliced on the ground to form a rectangular structure;
lifting the lower support structure to move above the bridge pier, and descending the lower support structure so that the lower support structure is sleeved on the bridge pier and supported by the end parts of the support rods;
A middle layer supporting structure is installed, wherein the middle layer supporting structure is lifted to move above a pier, and the middle layer supporting structure is lowered, so that the middle layer supporting structure is sleeved with the pier and is placed above the lower layer supporting structure;
And installing an upper layer supporting structure, namely lifting the upper layer supporting structure to move above the bridge pier, and lowering the upper layer supporting structure so that the upper layer supporting structure is sleeved with the bridge pier and placed above the middle layer supporting structure.
In the technical scheme, the lower-layer supporting structure, the middle-layer supporting structure and the upper-layer supporting structure are assembled on the ground, and then are sequentially installed and placed through hoisting, so that the operation is convenient, the operation steps are greatly reduced, and the working efficiency is improved.
In some embodiments, in the step of establishing the supporting structure, the step after the supporting rods are penetrated inside the through holes further comprises the steps of placing the supporting pieces at the end parts of the corresponding supporting rods, placing the supporting rods in the yielding grooves, and placing the supporting plates above the corresponding supporting rods and horizontally.
In the technical scheme, the stability of connection between the lower chord member and the supporting rod is improved through the supporting piece, and the stability of the structure is improved.
In some embodiments, the lower support structure is installed, and the lower support structure is lowered, so that the lower support structure is sleeved on the bridge pier and supported by the end portions of the support rods, and the lower surface of the lower chord member is placed on the corresponding support plate.
In some of these embodiments, the step after installing the upper support structure further comprises welding a fence to the rim of the upper surface of the platform.
In some embodiments, in the step of establishing the support structure, the step of placing the support bar after the relief groove further comprises tightening a lock nut at an end of the support bar, the lock nut tightening the corresponding platen against the pier.
In the technical scheme, the support piece is fixed with the support rod by the lock nut, so that the connection strength of the support frame and the support rod is improved, and the connection strength between the lower-layer support structure and the support rod is improved.
Based on the above technical scheme, in the embodiment of the invention, the support rod supports the lower layer support structure, the lower layer support structure supports the middle layer support structure, the middle layer support structure supports the upper layer support structure, and the lower layer support structure, the middle layer support structure and the upper layer support structure are stacked and arranged without soft materials, so that the structure is stable. And the pier is sleeved on the lower layer supporting structure, the middle layer supporting structure and the upper layer supporting structure, so that the stability of the pier is further improved, and dangers caused by shaking of the cantilever bent cap construction system are avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of an embodiment of a cantilever capping beam construction system of the present invention;
FIG. 2 is a schematic view of a support member of one embodiment of a cantilever capping beam construction system of the present invention;
FIG. 3 is a schematic cross-sectional view of a pier of one embodiment of the cantilever capping beam construction system of the present invention;
fig. 4 is a schematic view of a part of a bailey frame according to an embodiment of the cantilever capping beam construction system of the present invention;
FIG. 5 is a flow chart of one embodiment of a cantilever capping beam construction method of the present invention.
In the figure:
100. bridge pier 200, supporting rod 300, supporting piece 301, pressing plate 302, abdication groove 303, supporting plate 304, rib plate 400, round platform nut 500, steel pipe 600, first rubber pad 700, second rubber pad 800, lower layer supporting structure 801, lower chord 802, upper chord 803, connecting rod 900, bailey frame 110, cross beam 120, square timber 130, hand and foot frame 140, guardrail 150, locking nut.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and "third" 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 defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly connected, or indirectly connected through an intermediary, or may be in communication with the interior of two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 4, in an exemplary embodiment of the cantilever capping beam construction system method of the present invention, the cantilever capping beam construction system comprises a supporting bar 200, a lower supporting structure 800, a middle supporting structure and an upper supporting structure, wherein the supporting bar 200 is used for penetrating through a pier 100, the lower supporting structure 800 comprises two upper chords 802 and two lower chords 801, the upper chords 802 and the lower chords 801 are parallel and horizontally arranged, the two lower chords 801 are respectively arranged below the two upper chords 802, the two lower chords 801 are supported by the supporting bar 200 extending out of two ends of the pier 100, the lower chords 801 support the upper chords 802, the middle supporting structure comprises a plurality of bailey frames 900, the bailey frames 900 are parallel and spaced apart, any two adjacent bailey frames 900 are connected with each other, the middle supporting structure is rectangular, the middle supporting structure is sleeved with the pier 100 and supported on the lower supporting structure 800, the upper supporting structure is rectangular, and the upper supporting structure is sleeved with the pier 100 and supported on the middle supporting structure. The support bar 200 supports the lower support structure 800, the lower support structure 800 supports the middle support structure, the middle support structure supports the upper support structure, and the lower support structure 800, the middle support structure and the upper support structure are stacked, which are not made of soft materials, so that the structure is stable. And the pier 100 is sleeved on the lower supporting structure 800, the middle supporting structure and the upper supporting structure, so that the stability of the pier is further improved, and dangers caused by shaking of the cantilever bent cap construction system are avoided. And the lower layer supporting structure 800, the middle layer supporting structure and the upper layer supporting structure are sequentially sleeved on the bridge pier, so that the operation is convenient, and the working efficiency is high.
Specifically, the support rod 200 is made of steel, and the diameter of the support rod 200 is selected according to the requirement, so that the larger the weight is, the larger the diameter of the support rod 200 is.
As shown in fig. 1 to 4, in an embodiment, the bridge pier 100 is hollow, a through hole is formed in the bridge pier 100 for the support rod 200 to pass through, a round table nut 400 is disposed at a position corresponding to the through hole in the bridge pier 100, and the round table nut 400 is communicated with the corresponding through hole. One side of each round table nut 400, which is away from the inner wall of the corresponding pier 100, is also connected with a steel pipe 500, and the steel pipe 500 is communicated with the corresponding through hole. When the supporting rod 200 passes through the through hole, the supporting rod 200 also passes through the round platform nut 400 and the steel pipe 500, and the connection between the bridge pier 100 and the supporting rod 200 is further achieved through the steel pipe 500 and the round platform nut 400, so that the supporting effect is improved.
In one embodiment, the support rods 200 have at least two support rods 200, and the two support rods 200 are parallel and located at the same height. The plurality of support rods 200 support the lower support structure 800, and further improve stability of the lower support structure 800 on the pier 100, so as to improve overall stability of the cantilever capping beam construction system.
As shown in fig. 1 to 4, in an embodiment, the support members 300 are disposed at the ends of the support rods 200 extending out of the bridge pier 100, the support members 300 include a pressing plate 301 and a support plate 303, the support plate 303 is horizontally disposed above the corresponding support rod 200, the pressing plate 301 is fixed below the support plate 303, and a yielding groove 302 is formed in the pressing plate 301 for placing the support rod 200. The support members 300 are connected with the support rods 200 and the lower chords 801 in the lower support structure 800, so that the lower support structure 800 is prevented from slipping on the support rods 200, and the overall stability of the structure is further improved.
Specifically, the relief groove 302 penetrates the pressing plate 301, and when the supporting plate 303 is horizontal and the pressing plate 301 is positioned below the supporting plate 303, the supporting plate 303 is perpendicular to the pressing plate 301, and the relief groove 302 penetrates the bottom end of the pressing plate 301. To facilitate placement of the brace 200 within the relief groove 302.
In one embodiment, the pressing plate 301 is provided with a plurality of reinforcing ribs, one side of each reinforcing rib is connected with the pressing plate 301, and the top of each reinforcing rib is connected with the supporting plate 303, so that the strength of the whole structure is improved through the reinforcing ribs.
As shown in fig. 1 to 4, in an embodiment, a first rubber pad 600 is provided between the support 300 and the bridge pier 100, and the first rubber pad 600 prevents the bridge pier 100 from being scratched and affecting the beauty. And the top end of the first rubber pad 600 extends above the lower chord 801, and the lower chord 801 is also separated from the pier 100 by the first rubber pad 600.
In one embodiment, a second rubber pad 700 is provided between the upper chord 802 and the pier 100 to prevent the upper chord 802 from scratching the pier 100.
In an embodiment, the end portion of the supporting rod 200 extending out of the pier 100 is provided with a threaded section, the end portion of the supporting rod 200 is in threaded connection with the locking nut 150, the locking nut 150 is connected with the supporting rod 200 to tightly support the pressing plate 301 against the pier 100, the pressing plate 301 is prevented from being separated from the pier 100, the supporting piece 300 is prevented from being separated to cause the toppling of the cantilever bent cap construction system, the stability of the structure is improved, potential safety hazards are reduced, and the safety is improved.
Specifically, a pressing block is further arranged between the locking bolt and the pier 100, and the supporting rod 200 is sleeved on the pressing block. Still be provided with the fixture block on the clamp plate 301, the briquetting is the rectangular block, and when briquetting butt clamp plate 301, a lateral wall laminating of briquetting in the lateral wall of fixture block, the unable rotation of briquetting can only follow the axial displacement of bracing piece 200 this moment, and the rethread lock bolt compresses tightly the briquetting to avoid the vibration to lead to bracing piece 200 or lock nut 150 to rotate, avoid lock nut 150 to break away from bracing piece 200, further improve the stability of structure.
In one embodiment, the reinforcing mesh is fixed at the through hole, so that the structural strength of the through hole is improved, and the abrasion between the supporting rod 200 and the pier 100 is reduced.
As shown in fig. 1 to 4, in an embodiment, the lower support structure 800 further includes a plurality of connecting rods 803, wherein the connecting rods 803 are disposed between the upper chord 802 and the lower chord 801, and two ends of the connecting rods 803 are connected to the upper chord 802 and the lower chord 801, respectively. The connecting rod 803 supports the upper chord 802 and the lower chord 801 to facilitate construction, and increases the height of the lower support structure 800 to increase the overall height of the cantilever beam construction system, thereby facilitating the construction of the cantilever beam for the personnel on top of the pier 100.
Specifically, the plurality of connecting rods 803 include vertical or inclined arrangement, at least one inclined connecting rod 803 is arranged between two connecting rods 803 in vertical arrangement, and an included angle is formed between any two adjacent connecting rods 803 to form a triangle structure, so that stability of the lower support structure 800 is improved.
More specifically, there is also a portion of the connecting rod 803 which is horizontal, and both ends of the connecting rod 803 are respectively connected to the two upper chords 802, or both ends of the connecting rod 803 are respectively connected to the two lower chords 801, so that the two upper chords 802 and the two lower chords 801 form a single body.
As shown in fig. 1 to 4, in an embodiment, the bailey frame 900 is composed of a plurality of bailey pieces, and the plurality of bailey pieces are sequentially connected along a single direction to form an elongated bailey frame 900. The length direction of the bailey frame 900 is set along the length direction of the upper chord 802, and the width direction of the bailey frame 900 is set vertically.
In an embodiment, a plurality of cross beams 110 are further disposed between the lower support structure 800 and the middle support structure, the cross beams 110 are disposed horizontally and the length direction is perpendicular to the upper chord 802, and the plurality of cross beams 110 are disposed at intervals along the length direction of the upper chord 802. A plurality of bailey frames 900 are placed above the cross beam 110. The bailey frame 900 is supported by the cross beam 110, reducing difficulty in installation, and improving stability of the structure.
Specifically, bolts extend through the transom 110 to connect the scaffolding to the upper chord 802.
As shown in fig. 1 to 4, in one embodiment, the upper support structure includes a plurality of scaffolds and guard rails 140, the plurality of scaffolds being spliced to form a rectangular platform, the guard rails 140 being disposed along edges of the platform to form an enclosure. The scaffold is a standard component, and is convenient to purchase and install. The constructor is prevented from falling down through the guard rail 140, and the safety is further improved.
Specifically, the scaffold is a bowl buckle support, the structure is simple and convenient to install, and the working efficiency is improved.
As shown in fig. 1 to 4, in an embodiment, the upper support structure further includes a plurality of square lumber 120, and the square lumber 120 is disposed above the bailey frame 900 in the middle support structure. The scaffolding is disposed above the partial decibel lightning frame 900.
Specifically, the plurality of square lumber 120 are respectively disposed at both ends of the bailey frame 900. The upper surface of the formed scaffold is in a shape with a middle low and two high sides.
More specifically, a wood board is laid above the scaffold to facilitate the walking of the worker.
By way of illustration of various embodiments of the cantilever capping beam construction system of the present invention, it can be seen that the cantilever capping beam construction system embodiments of the present invention have at least one or more of the following advantages:
1. The support bar 200 supports the lower support structure 800, the lower support structure 800 supports the middle support structure, the middle support structure supports the upper support structure, and the lower support structure 800, the middle support structure and the upper support structure are stacked, and have no soft material, so that the structure is stable;
2. A side wall of the pressing block is attached to a side wall of the clamping block, at the moment, the pressing block cannot rotate and can only move along the axial direction of the supporting rod 200, and the pressing block is pressed by the locking bolt, so that the supporting rod 200 or the locking nut 150 is prevented from rotating due to vibration, the locking nut 150 is prevented from being separated from the supporting rod 200, and the stability of the structure is further improved.
Referring to fig. 5, the invention also discloses a cantilever bent cap construction method, which is used for constructing the cantilever bent cap construction system, and comprises the following steps:
S100, establishing a supporting structure, namely, penetrating a plurality of through holes on the bridge pier 100, and penetrating supporting rods 200 in the through holes;
S200, establishing a lower layer supporting structure 800, namely welding an upper chord 802, a lower chord 801 and a connecting rod 803 on the ground to form a structure;
s300, establishing a middle layer supporting structure, namely splicing a plurality of bailey pieces on the ground to form a bailey frame 900, and splicing a plurality of bailey frames 900 to form a rectangular structure;
s400, establishing an upper layer supporting structure, namely splicing a plurality of scaffolds on the ground to form a rectangular structure;
S500, installing the lower support structure 800, namely lifting the lower support structure 800 to move above the bridge pier 100, and lowering the lower support structure 800 so that the lower support structure 800 is sleeved with the bridge pier 100 and supported by the end parts of the support rods 200;
S600, installing a middle layer support structure, namely lifting the middle layer support structure to move above the bridge pier 100, and descending the middle layer support structure so that the middle layer support structure is sleeved with the bridge pier 100 and placed above the lower layer support structure 800;
S700, installing an upper layer supporting structure, namely lifting the upper layer supporting structure to move above the bridge pier 100, and descending the upper layer supporting structure so that the upper layer supporting structure is sleeved with the bridge pier 100 and placed above the middle layer supporting structure. The lower layer supporting structure 800, the middle layer supporting structure and the upper layer supporting structure are assembled on the ground, and then are sequentially installed and placed through hoisting, so that the operation is convenient, the operation steps are greatly reduced, and the working efficiency is improved.
In an embodiment, in the step S100 of establishing the support structure, the step before the support rod 200 is inserted into the through hole further includes that the through hole is formed in the pier 100 by using an electric drill, the pier 100 is manually accessed, the round platform nut 400 is installed in the pier 100, and the round platform nut 400 is communicated with the corresponding through hole. A steel pipe 500 is manually inserted into the round table nut 400.
In one embodiment, in the step S100 of establishing the supporting structure, the step after the supporting rod 200 is inserted into the through hole further includes sleeving the end portion of the supporting rod 200 extending out of the pier 100 with the first rubber pad 600. The support 300 is placed at the end of the corresponding support bar 200, the support bar 200 is placed in the relief groove 302 of the pressing plate 301, and the support plate 303 is manually adjusted to place the support plate 303 above the corresponding support bar 200 and horizontally set. The stability of the connection between the lower chord 801 and the support bar 200 is improved by the support 300, and the stability of the structure is improved.
In an embodiment, in the step S100 of establishing the supporting structure, the step after the supporting plate 303 is disposed above the corresponding supporting rod 200 and horizontally disposed further includes sleeving the pressing block with the supporting plate 303, and attaching the pressing block to the pressing plate 301, where one side of the pressing block is attached to the side wall of the clamping block. The lock nuts 150 are tightened at the ends of the support rods 200, the lock nuts 150 press the corresponding clips against the compression plates 301, and the lock nuts 150 are continued to be tightened so that the compression plates 301 are pressed against the pier 100. The support 300 is fixed to the support bar 200 by the lock nut 150, and the connection strength of the support frame and the support bar 200 is improved to improve the connection strength between the lower support structure 800 and the support bar 200.
In one embodiment, the step S200 of constructing the lower support structure 800 comprises the specific steps of arranging two lower chords 801 in parallel on the ground, welding the connecting rods 803 between the two lower chords 801, welding the connecting rods 803 on the upper surfaces of the lower chords 801, arranging the upper chords 802 above the corresponding lower chords 801, and welding the upper chords 802 with the corresponding connecting rods 803. A connecting bar 803 is welded between the two upper chords 802.
In an embodiment, step S300 establishes a middle layer supporting structure, and a plurality of bailey pieces are spliced on the ground to form a bailey frame 900, and the steps of splicing the plurality of bailey frames 900 to form a rectangular structure include sequentially connecting the plurality of bailey pieces along a single direction to form a strip-shaped bailey frame 900.
In one embodiment, the step S400 of establishing an upper layer supporting structure comprises the specific steps of prefabricating a plurality of square timbers 120 on the ground, arranging the square timbers 120 at intervals, and constructing the scaffold above the square timbers 120.
In an embodiment, in step S500, the lower support structure 800 is installed, and the step before the lower support structure 800 is lowered is to attach a second rubber pad 700 to the bridge pier 100, where the position of the second rubber pad 700 corresponds to the position of the upper chord 802 after the lower support structure 800 is installed.
In one embodiment, in step S500, the lower support structure 800 is installed, and the lower support structure 800 is lowered such that the lower support structure 800 is sleeved with the bridge pier 100 and supported by the end of the support bar 200, and the lower surface of the lower chord 801 is placed above the corresponding support plate 303.
In one embodiment, in the step S500 of installing the lower support structure 800, the step after the lower surface of the lower chord 801 is placed above the corresponding support plate 303 is that the steel bar passes through the two upper chords 802 and the bridge pier 100, the two ends of the steel bar pass through the upper chords 802, the nuts are screwed on the two ends of the steel bar passing through the upper chords 802, and the two upper chords 802 can be tightly attached to the bridge pier 100 through the nuts, so that the stability of the structure is improved.
In one embodiment, in step S600, a middle layer support structure is installed, the middle layer support structure is lifted and moved to above the bridge pier 100, and the middle layer support structure is lowered, so that the middle layer support structure is sleeved with the bridge pier 100 and placed above the lower layer support structure 800, wherein the plurality of cross beams 110 are lifted and placed above the upper chord 802, the cross beams 110 are horizontally arranged and vertically arranged in the length direction, and the plurality of cross beams 110 are arranged at intervals along the length direction of the upper chord 802. And lifting the bailey frame 900, wherein the bailey frame 900 is placed above the cross beam 110, the length direction of the bailey frame 900 is arranged along the length direction of the upper chord 802, and the width direction of the bailey frame 900 is vertically arranged.
In other embodiments, for stability of the bailey 900, the beam 110 and the bailey 900 are connected to the corresponding upper chord 802 by bolts after the bailey 900 is placed over the beam 110.
In one embodiment, in step S700, an upper supporting structure is installed, the upper supporting structure is lifted and moved above the bridge pier 100, and the upper supporting structure is lowered, so that the upper supporting structure is sleeved with the bridge pier 100 and placed above the middle supporting structure. And lifting the scaffold, placing the scaffold above the bridge pier 100, enabling the hollow position of the scaffold to correspond to the bridge pier 100, lowering the scaffold, and placing the scaffold above the square timber 120 and the bailey 900.
In one embodiment, the top of the scaffolding is flush with the top of the pier 100.
In one embodiment, the top surface of the scaffold is the same as the lower surface of the cantilever cap beam that needs to be constructed.
In one embodiment, the step after installing the upper support structure at step S700 further includes laying a plank on the upper surface of the scaffold to facilitate walking by a person.
In one embodiment, the step after installing the upper support structure at step S700 further includes welding the rail 140 to the rim of the upper surface of the platform.
By way of illustration of various embodiments of the cantilever capping beam construction system of the present invention, it can be seen that the cantilever capping beam construction system embodiments of the present invention have at least one of the following advantages:
The lower layer supporting structure 800, the middle layer supporting structure and the upper layer supporting structure are assembled on the ground, and then are sequentially installed and placed through hoisting, so that the operation is convenient, the operation steps are greatly reduced, and the working efficiency is improved.
Finally, it should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are only required to be mutually referred.
The foregoing embodiments are only for illustrating the technical scheme of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention may be modified or parts of technical features may be equivalently replaced without departing from the spirit of the technical scheme of the present invention, and the scope of the technical scheme of the present invention is covered by the claims.
Claims (9)
1. The cantilever bent cap construction method is characterized by being used for constructing a cantilever bent cap construction system, and the cantilever bent cap construction system comprises the following steps:
the support rod is used for penetrating through the bridge pier;
The lower layer support structure comprises two upper chords and two lower chords, wherein the upper chords and the lower chords are parallel to each other and are horizontally arranged, and the two lower chords are respectively arranged below the two upper chords;
The middle layer support structure comprises a plurality of bailey frames which are parallel to each other and are arranged at intervals, and any two adjacent bailey frames are connected with each other;
The upper layer supporting structure is rectangular, and is sleeved with the bridge pier and supported on the middle layer supporting structure;
The inside of the pier is hollow, a through hole is communicated with the pier for the supporting rod to pass through, a round platform nut is arranged at the position, corresponding to the through hole, of the inside of the pier, the round platform nut is communicated with the corresponding through hole, one side, deviating from the inner wall of the corresponding pier, of each round platform nut is also connected with a steel pipe, the steel pipe is communicated with the corresponding through hole, and when the supporting rod passes through the through hole, the supporting rod also passes through the round platform nut and the steel pipe;
the cantilever bent cap construction method comprises the following steps:
A supporting structure is established, wherein a plurality of through holes are formed in the bridge pier, and the supporting rods are penetrated in the through holes;
The step before the support rod is penetrated in the through hole further comprises the steps of opening the through hole on the pier by utilizing an electric drill, manually entering the pier, and installing a round platform nut in the pier, wherein the round platform nut is communicated with the corresponding through hole;
establishing a lower layer supporting structure, namely welding an upper chord, a lower chord and a connecting rod on the ground to form a structure;
A middle layer supporting structure is established, namely a plurality of bailey pieces are spliced on the ground to form a bailey frame, and a plurality of bailey frames are spliced to form a rectangular structure;
An upper layer supporting structure is established, namely a plurality of scaffolds are spliced on the ground to form a rectangular structure;
lifting the lower support structure to move above the bridge pier, and descending the lower support structure so that the lower support structure is sleeved on the bridge pier and supported by the end parts of the support rods;
A middle layer supporting structure is installed, wherein the middle layer supporting structure is lifted to move above a pier, and the middle layer supporting structure is lowered, so that the middle layer supporting structure is sleeved with the pier and is placed above the lower layer supporting structure;
And installing an upper layer supporting structure, namely lifting the upper layer supporting structure to move above the bridge pier, and lowering the upper layer supporting structure so that the upper layer supporting structure is sleeved with the bridge pier and placed above the middle layer supporting structure.
2. The cantilever capping beam construction method according to claim 1, wherein the number of the support rods is at least two, and the two support rods are parallel and located at the same height.
3. The cantilever bent cap construction method according to claim 2, wherein the support rods are provided with support members at one ends extending out of the bridge piers, the support members comprise pressing plates and support plates, the support plates are horizontally arranged above the corresponding support rods, the pressing plates are fixed below the support plates, and the pressing plates are provided with abdication grooves for placing the support rods.
4. The cantilever bent cap construction method according to claim 3, wherein the upper support structure comprises a plurality of scaffolds and guardrails, the plurality of scaffolds are spliced to form a rectangular platform, and the guardrails are arranged along edges of the platform to form an enclosing structure.
5. The cantilever capping beam construction method of claim 4, wherein the lower support structure further comprises a plurality of connecting rods, the connecting rods are disposed between the upper chord and the lower chord, and two ends of the connecting rods are connected to the upper chord and the lower chord, respectively.
6. The cantilever bent cap construction method according to claim 5, wherein the step of setting up the supporting structure after the supporting bars are inserted inside the through holes further comprises placing the supporting members at the ends of the corresponding supporting bars, placing the supporting bars in the relief grooves, and placing the supporting plates above the corresponding supporting bars and horizontally.
7. The cantilever capping beam construction method according to claim 6, wherein the specific step of installing the lower support structure, lowering the lower support structure so that the lower support structure is sleeved with the pier and supported by the end portions of the support bars is to place the lower surface of the lower chord on the corresponding support plate.
8. The cantilever capping beam construction method of claim 6, wherein the step of placing the support bar after the relief groove in the set-up support structure further comprises tightening a lock nut at an end of the support bar, the lock nut abutting a corresponding platen against a pier.
9. The method of claim 6, wherein the step of installing the upper support structure further comprises welding a rail to the edge of the upper surface of the platform.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN214005440U (en) * | 2020-11-30 | 2021-08-20 | 中交二公局第一工程有限公司 | Assembled double-layer truss bent cap support |
| CN215758543U (en) * | 2021-08-02 | 2022-02-08 | 中交第二航务工程局有限公司 | Integrated construction structure of large cantilever arm cover beam |
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| CN103184722B (en) * | 2013-03-18 | 2015-01-28 | 广州市市政工程机械施工有限公司 | Large-span double-layer Bailey truss structure and construction method thereof |
| CN110747746B (en) * | 2019-10-21 | 2021-03-23 | 宁波市政工程建设集团股份有限公司 | Temporary supporting system for small box girder type hidden cover beam prefabricated on road and bridge and construction method thereof |
| CN111663449A (en) * | 2020-05-23 | 2020-09-15 | 中交路桥建设有限公司 | Combined cast-in-place box girder support system and construction method |
| CN214005438U (en) * | 2020-11-30 | 2021-08-20 | 广西路建工程集团有限公司 | Long cantilever bent cap assembled bracket |
| CN216006658U (en) * | 2021-10-20 | 2022-03-11 | 聊城市交通发展有限公司 | Pier bent cap supporting structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214005440U (en) * | 2020-11-30 | 2021-08-20 | 中交二公局第一工程有限公司 | Assembled double-layer truss bent cap support |
| CN215758543U (en) * | 2021-08-02 | 2022-02-08 | 中交第二航务工程局有限公司 | Integrated construction structure of large cantilever arm cover beam |
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