CN210049103U - High-grade high-speed highway bracket spanned by large-span cast-in-place box girder - Google Patents
High-grade high-speed highway bracket spanned by large-span cast-in-place box girder Download PDFInfo
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- CN210049103U CN210049103U CN201920433763.3U CN201920433763U CN210049103U CN 210049103 U CN210049103 U CN 210049103U CN 201920433763 U CN201920433763 U CN 201920433763U CN 210049103 U CN210049103 U CN 210049103U
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Abstract
High-grade high-speed highway support is strideed across to cast-in-place case roof beam of long span, the utility model relates to a bridge engineering field. The utility model discloses a solve the cast-in-place roof beam of current big stride when striding high highway construction, adopt individual layer, small-span bailey roof beam support, the support can occupy highway's lane always before demolising, to highway's driving safety and the great problem of support safety influence. The utility model discloses a horizontal distribution roof beam of a plurality of die block boards, a plurality of adjustable height top support, bailey roof beam longeron and a plurality of supporting component, bailey roof beam longeron level sets up, and the horizontal distribution roof beam of die block board and adjustable height top support from top to bottom install in proper order at the upper surface of bailey roof beam longeron, and are a plurality of the supporting component sets up the lower surface at bailey roof beam longeron along the length direction of bailey roof beam longeron.
Description
Technical Field
The utility model relates to a bridge engineering field, concretely relates to cast-in-place case roof beam strides high-grade high-speed highway support suitable for long span.
Background
With the development of domestic highways and railways, lines cross and span more and more, and when the lines span in a cast-in-place bridge mode, various complex environments among the lines bring certain difficulty to the design and construction of a cast-in-place beam support. Influenced by various conditions, more factors need to be considered, and requirements such as bridge span, foundation, bridge clearance and the like need to be considered in the design. When the large-span cast-in-place beam spans a high-speed highway for construction, the full-space support is generally unavailable due to the traffic requirement of the highway. When the existing cast-in-place beam with a large span spans a high-speed road, a single-layer and small-span Bailey beam support is generally adopted, in order to reduce the span of the Bailey beam, a pier is generally arranged on a lane of the high-speed road, the support always occupies the lane of the high-speed road before being dismantled, and the influence on the driving safety of the high-speed road and the support safety is large.
The bridge span structure of the bridge span of the Mongolian to Huazhong railway coal transportation channel span-connected huo expressway is a 1-80m dumbbell-shaped steel tube concrete basket arch. The total length of the tie beam is 82.5m, the calculated span is 80m, a single-box three-chamber prestressed concrete box-shaped section is adopted, the heights of the span middle and end beams are both 2.5m, and the bridge deck width of the beam part is 16.2 m. The tie beam spans the isolation belt parts in the motor vehicle lane, the emergency lane and the motor vehicle lane of the connecting-cabin highway, the cast-in-place box girder concrete is poured once, and the cast-in-place girder support allows the span to be not less than 27m for ensuring the safety of the connecting-cabin highway.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that when the existing large-span cast-in-place beam strides the construction of the high-speed highway, the single-layer and small-span Bailey beam support is adopted, the support can always occupy the lane of the highway before being dismantled, and the great problem of traffic safety and support safety influence on the highway is solved. Further provides a bracket for a large-span cast-in-place box girder to span high-grade express highway.
The technical scheme of the utility model is that: the utility model provides a cast-in-place box girder of big stride strides high-grade high-speed highway support, includes a plurality of bottom forms horizontal distribution roof beams, a plurality of adjustable height top holds in the palm, bailey roof beam longeron and a plurality of supporting component, bailey roof beam longeron level sets up, and bottom forms horizontal distribution roof beams and adjustable height top hold in the palm installs in proper order from top to bottom in the upper surface of bailey roof beam longeron, and is a plurality of supporting component sets up the lower surface at the bailey roof beam longeron along the length direction of bailey roof beam longeron.
Compared with the prior art, the utility model has the following effect: the utility model adopts the double-layer reinforced Bailey beam to reasonably combine the support design, increases the span of the support to 27m, does not occupy the highway lane and the attached facilities, and can safely and efficiently complete the construction of the cast-in-place beam; the utility model reduces the influence on the highway driving in the support construction process to the minimum; the utility model can be applied to the engineering of the single-box three-chamber cast-in-place box girder with the span of 80 meters for spanning the high-grade highway, thereby not only ensuring the normal operation of the existing highway, but also ensuring the safe and normal construction of the bridge; the utility model discloses a cast-in-place box girder bearing formula road construction support material is common, has the characteristics that can fall down the usefulness, has practiced thrift construction cost greatly.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top cross-sectional view of FIG. 1;
FIG. 3 is a schematic structural view of a safety construction platform;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic view of the lateral reinforcement of the bracket of the present invention;
fig. 6 is a schematic view of the vertical bar reinforcement of the bracket of the present invention;
FIG. 7 is a side view of FIG. 6; fig. 8 is a diagram of a pre-pressing monitoring position of the bracket of the present invention;
fig. 9 is a sectional view a-a of fig. 8.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 2, and the large-span cast-in-place box girder high-speed highway crossing support comprises a plurality of bottom formwork transverse distribution beams 1, a plurality of height-adjustable jacking supports 2, a Bailey girder longitudinal beam 3 and a plurality of support assemblies, wherein the Bailey girder longitudinal beam 3 is horizontally arranged, the bottom formwork transverse distribution beams 1 and the height-adjustable jacking supports 2 are sequentially arranged on the upper surface of the Bailey girder longitudinal beam 3 from top to bottom, and the plurality of support assemblies are arranged on the lower surface of the Bailey girder longitudinal beam 3 along the length direction of the Bailey girder longitudinal beam 3.
It is a plurality of the supporting component all is located between two pier 8, and two pier 8 set up the lower surface at 3 both ends of bailey beam longeron respectively. The Bailey beam longitudinal beam 3 is a double-layer reinforced Bailey beam, the double-layer reinforced Bailey beam longitudinal beam is formed by assembling and splicing double-layer Bailey beams, wherein upper and lower layers of trusses are connected by using truss bolts, the upper and lower layers of Bailey beams are respectively subjected to chord member reinforcement, the Bailey beams and reinforcing chord members are connected by using chord member bolts, three to five Bailey sheet transverse bridges are connected into a group, and the groups are connected by using standard flower stands; the drilling pile foundation is constructed by adopting a rotary drilling rig, other steel structures are hoisted and installed by adopting equipment, and the double-layer reinforced Bailey longitudinal beam is installed by adopting a 130t crawler crane and a fishing method. The utility model adopts the double-layer reinforced Bailey beam to reasonably combine the support design, increases the span of the support to 27m, does not occupy the highway lane and the attached facilities, and can safely and efficiently complete the construction of the cast-in-place beam;
the second embodiment is as follows: the present embodiment is described with reference to fig. 1 and 2, the support assembly of the present embodiment includes a plurality of distribution beam cross beams 4, a plurality of column foundations 5, a plurality of reinforced concrete strip foundations 6, and a plurality of bored pile foundations 7, the plurality of distribution beam cross beams 4 are disposed on the lower surface of the beret longitudinal beam 3, and a plurality of column foundations 5 are disposed between the distribution beam cross beams 4 and the piers 8 on the lower surfaces of both ends of the beret longitudinal beam 3; be located and be equipped with a plurality of stand foundations 5 between 3 middle distribution beam crossbeam 4 of bailey beam and the reinforced concrete bar foundation 6, the lower surface of reinforced concrete bar foundation 6 is equipped with a plurality of drilling pile foundations 7. Other components and connections are the same as in the first embodiment.
The third concrete implementation mode: the embodiment is described with reference to fig. 3 and 4, and the support for the large-span cast-in-place box girder to span high-speed highway further comprises a bottom protective wire net 9, wherein the bottom protective wire net 9 is installed at the bottom of the bailey girder longitudinal beam 3.
The wire netting is vertical to the segmentation and guarantee that overlap joint length is not less than 10cm, prevents that debris from falling into highway in the work progress. Other components and connections are the same as in the first embodiment.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 3 and 4, and the large-span cast-in-place box girder high-speed highway crossing support further comprises a safety construction platform assembly, two ends of the bottom formwork transverse distribution beam 1 are respectively provided with an outer edge 1-1 extending outwards, and the safety construction platform assembly is respectively located on two sides of the upper surface of the beret girder 3 and on the outer edge 1-1. And (3) respectively extending 1.5m outwards from two ends of the transverse distribution beam 1 of the bottom template to build a safe construction platform.
Other components and connections are the same as in the first embodiment.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 3 to 4, the safety construction platform assembly of the embodiment is composed of a pedal 10, a plurality of steel pipe columns 11, a transverse fence 12 and a protective net 13, the pedal 10 is arranged on the upper surface of the outer edge 1-1, the plurality of steel pipe columns 11 are arranged on the outer side of the pedal 10 at equal intervals, the transverse fence 12 is arranged on the outer side of the steel pipe columns 11, and the protective net 13 is arranged on the outer side of the transverse fence 12.
The platform takes the square wood-bamboo plywood as a pedal, and the upright posts are steel tube upright posts. So set up to the safety protection in the time of guaranteeing the construction. Other compositions and connection relations are the same as those of the fourth embodiment.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 1 to 9, and the construction method of the present embodiment includes the steps of:
the method comprises the following steps: constructing a support foundation, building a drilled pile 7 and a strip foundation 6, constructing the drilled pile 7 by adopting rotary drilling, wherein a middle bridge pier 8 occupies one lane on each of two sides of a green belt of the expressway during the foundation construction;
step two: constructing a support steel pipe upright post 5 and a distribution beam 4;
step three: the double-layer reinforced Bailey beam longitudinal beam 3 at the non-road-crossing position is installed by using hoisting equipment, the double-layer reinforced Bailey beam longitudinal beam 3 is formed by assembling and splicing double-layer Bailey beams, wherein an upper layer truss and a lower layer truss are connected by using truss bolts, three to five Bailey pieces of transverse bridges are connected into a group, and the groups are connected by using standard flower stands;
step four: the hoisting equipment is used for installing a cross-road 27m Bailey beam longitudinal beam 3 on the upper part of a Bailey beam longitudinal beam 3 in a constructed non-cross-road position, separating an upper Bailey beam from a lower Bailey beam, firstly installing a lower Bailey beam, temporarily controlling the expressway in the process of installing the lower Bailey beam for about 10min each time, and then installing an upper Bailey beam, wherein the lower Bailey beam is installed during installation, and temporary control is not needed any more;
step five: the hoisting equipment installs the rest 27m Bailey beam longitudinal beam 3 across the road on the upper part of the Bailey beam longitudinal beam 3 at the constructed road-crossing position, the installation step is the same as the previous step, and the road-sealing measure is also the same as the previous step;
step six: a bottom-binding protection wire netting 9 is arranged at the bottom of the Bailey beam longitudinal beam 3, and safe construction platform components are respectively arranged on two sides of the upper surface of the Bailey beam longitudinal beam 3;
step seven: performing reinforcement treatment on the installed bracket;
step eight: prepressing and monitoring the load-bearing type cross road bracket, and prepressing the bracket by adopting a steel plate according to the load distribution condition of the cast-in-place box girder; setting a prepressing section every 5m along the length direction of the cast-in-place box girder, wherein each prepressing section is provided with 7 measurement control points, 2 points are arranged at the position of a side web plate, 2 points are arranged at the position of a side bottom plate, 2 points are arranged at the position of a middle web plate, and 1 point is arranged at the position of a middle bottom plate; the pre-compression cross-section is indicated by the reference numerals 1-17 in fig. 8, and the 7 measurement control points are indicated by 1-7 in fig. 9.
Step nine: installing a cast-in-place beam template;
step ten: the construction of the cast-in-place beam adopts a construction method of pouring a bridge once, the total length is 82.5m, and 2 automobile pumps are symmetrically poured from two sides to the middle.
The large-span cast-in-place box girder adopts a construction method of pouring a bridge once, the total length is 82.5m, and the concrete is 1791m
3And 2 automobile pumps are adopted for pouring from two sides to the middle. The utility model discloses the support construction method who uses reduces the influence to the highway driving to minimum in the support construction process; the utility model discloses can be applied to and stride high-grade highway's engineering on the cast-in-place case roof beam of single case three rooms that the stride footpath is 80 meters, both can guarantee highway's normal operation, also can guarantee construction safety, the normal clear of newly-built bridge.
The seventh embodiment: the present embodiment is described with reference to fig. 5 to 7, and the reinforcement processing in the seventh step of the present embodiment includes lateral reinforcement and vertical bar reinforcement, where the lateral reinforcement step is as follows:
step 1: transversely penetrating the I-steel 14 into the Bailey beam bracket;
step 2: connecting the I-steel 16 with the Bailey sheet by using a U-shaped clamp 15 and a steel plate 7;
so as to increase the stability of the whole bracket;
according to the seventh specific embodiment, the construction method for the large-span cast-in-place box girder to span the high-grade high-speed highway support,
the method is characterized in that: the method for reinforcing the vertical rod comprises the following steps:
step 1: mounting channel steel 17 against a Bailey sheet vertical rod, and mounting base plates 18 on the upper part and the lower part of the channel steel 17;
in order to ensure that the installed channel steel 17 is closely attached to the upper chord and the lower chord of the bailey;
step 2: connecting channel steel 17 leaning against two sides of the same vertical rod by using a connecting steel plate 19;
and step 3: and filling a support steel plate 20 in the Bailey piece chord member.
The purpose of reinforcing the vertical rod is to increase the bearing capacity of the vertical rod of the Bailey sheet; other components and connection relationships are the same as those in the sixth embodiment.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited to the embodiments disclosed herein, and other changes and modifications within the spirit of the present invention may be made by those skilled in the art and those changes and modifications not mentioned herein are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a cast-in-place box girder of long span strides high-grade high-speed highway support which characterized in that: this highway support still includes a plurality of die block board horizontal distribution roof beam (1), a plurality of adjustable height top support (2), bailey roof beam longeron (3) and a plurality of supporting component, bailey roof beam longeron (3) level sets up, and die block board horizontal distribution roof beam (1) and adjustable height top support (2) from top to bottom install the upper surface at bailey roof beam longeron (3) in proper order, and are a plurality of the supporting component sets up the lower surface at bailey roof beam longeron (3) along the length direction of bailey roof beam longeron (3).
2. The large-span cast-in-place box girder spanning high-grade high-speed highway bracket according to claim 1, characterized in that: the supporting assembly comprises a plurality of distribution beam cross beams (4), a plurality of upright post foundations (5), a plurality of reinforced concrete strip foundations (6) and a plurality of bored pile foundations (7), the distribution beam cross beams (4) are arranged on the lower surface of the Bailey beam longitudinal beam (3), and the upright post foundations (5) are arranged between the distribution beam cross beams (4) on the lower surfaces of the two ends of the Bailey beam longitudinal beam (3) and piers; be located between distribution beam crossbeam (4) in the middle of bailey beam longeron (3) and reinforced concrete bar foundation (6) and be equipped with a plurality of stand foundations (5), the lower surface of reinforced concrete bar foundation (6) is equipped with a plurality of drilling pile foundations (7).
3. The large-span cast-in-place box girder spanning high-grade high-speed highway bracket according to claim 1, characterized in that: the support for the large-span cast-in-place box girder to span high-speed highway further comprises a pocket bottom protection wire net (9), wherein the pocket bottom protection wire net (9) is arranged at the bottom of the Bailey girder longitudinal beam (3).
4. The large-span cast-in-place box girder spanning high-grade high-speed highway bracket according to claim 1, characterized in that: the support for the large-span cast-in-place box girder to span high-speed highway further comprises a safety construction platform assembly, two ends of the bottom formwork transverse distribution beam (1) are respectively provided with an outer edge (1-1) extending outwards, and the safety construction platform assembly is respectively positioned on two sides of the upper surface of the Bailey beam longitudinal beam (3) and positioned on the outer edge (1-1).
5. The large-span cast-in-place box girder spanning high-grade high-speed highway bracket according to claim 4, wherein: the safety construction platform assembly is composed of a pedal (10), a plurality of steel pipe columns (11), a transverse fence (12) and a protective net (13), wherein the pedal (10) is arranged on the upper surface of an outer edge (1-1), the plurality of steel pipe columns (11) are arranged on the outer side of the pedal (10) at equal intervals, the transverse fence (12) is arranged on the outer side of the steel pipe columns (11), and the protective net (13) is arranged on the outer side of the transverse fence (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920433763.3U CN210049103U (en) | 2019-03-29 | 2019-03-29 | High-grade high-speed highway bracket spanned by large-span cast-in-place box girder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920433763.3U CN210049103U (en) | 2019-03-29 | 2019-03-29 | High-grade high-speed highway bracket spanned by large-span cast-in-place box girder |
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| CN210049103U true CN210049103U (en) | 2020-02-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797662A (en) * | 2019-03-29 | 2019-05-24 | 中铁建大桥工程局集团第四工程有限公司 | Long span cast-in-situ box girder crosses over high-grade highway bracket and construction method |
| CN113235427A (en) * | 2021-05-28 | 2021-08-10 | 中铁二十局集团第三工程有限公司 | Support structure and construction method thereof |
| CN114108496A (en) * | 2021-12-24 | 2022-03-01 | 宁波市政工程建设集团股份有限公司 | Method for casting cross-river channel variable-section cast-in-place box girder by using independent few supports |
-
2019
- 2019-03-29 CN CN201920433763.3U patent/CN210049103U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797662A (en) * | 2019-03-29 | 2019-05-24 | 中铁建大桥工程局集团第四工程有限公司 | Long span cast-in-situ box girder crosses over high-grade highway bracket and construction method |
| CN113235427A (en) * | 2021-05-28 | 2021-08-10 | 中铁二十局集团第三工程有限公司 | Support structure and construction method thereof |
| CN114108496A (en) * | 2021-12-24 | 2022-03-01 | 宁波市政工程建设集团股份有限公司 | Method for casting cross-river channel variable-section cast-in-place box girder by using independent few supports |
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