Prefabricated and assembled UHPC box-shaped arch bridge

Abstract

The utility model relates to the field of bridge engineering, and discloses a prefabricated and assembled UHPC (Ultra High Performance Concrete) box-shaped arch bridge, which comprises two arch seats correspondingly arranged, a plurality of supporting units connected between the two arch seats, and mutually connected to form an arch rib; the stabilizing mechanism is arranged on the skewback, and the stabilizing mechanism is connected with the arch rib; according to the splicing type arch crown section, the arch middle section and the arch foot section, the whole structure is simple and reliable, structural stress is reasonable, meanwhile, installation can be conveniently carried out, the splicing type arch crown section and the splicing type arch foot section are suitable for large-span arch bridges which cannot be constructed through a full framing, and the splicing type arch crown section and the splicing type arch foot section are suitable for large-span arch bridges which cannot be constructed through the full framing. And therefore, the whole construction can be safely and stably carried out, the later maintenance is reduced, and the whole cycle life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering field especially relates to a prefabricated assembly UHPC box -shaped arch bridge. BACKGROUND

[0002] UHPC is "super high performance concrete", and it contains two aspects'super high' -super high durability and super high mechanical properties.UHPC is particularly suitable for long-span bridge, blast-resistant structure (military engineering, bank vaults etc.) and thin-walled structure, and is used in high abrasion, high corrosion environment, UHPC has been applied in some practical engineering, such as long-span pedestrian overpass, highway railway bridge, thin-walled silo, nuclear waste tank, cable anchorage reinforcement plate etc.It can be predicted that there will be more and more applications.

[0003] The existing conventional bridge is usually poured with concrete, and the structure size is large, and the construction is relatively inconvenient, so that the construction cost is high. UTILITY MODEL CONTENTS

[0004] To solve the technical problem of inconvenient construction, the utility model provides a prefabricated assembly UHPC box -shaped arch bridge.

[0005] The utility model adopts the following technical scheme to realize: a prefabricated assembly UHPC box -shaped arch bridge, comprising: arch seat, it is correspondingly provided with two, multiple support units are connected between two arch seats, and the support unit is mutually connected into arch rib;Stabilizing mechanism is set up on the arch seat, and the stabilizing mechanism is connected with the arch rib;Multiple base piles are provided, and one end of the base pile is connected with the arch seat;

[0006] As a further improvement of the above scheme, the arch rib is composed of mutually spliced arch, top section, arch middle section and arch foot section, and the arch middle section is composed of multiple arch sections, and the arch foot section at the bottom is connected with the stabilizing mechanism;

[0007] As a further improvement of the above scheme, the stabilizing mechanism comprises: prefabricated steel plate, which is inlaid on one side of the arch seat, and the prefabricated steel plate is connected with steel wedge component and locking steel batten;Movable steel wedge component is fixedly connected to the outer side of the arch seat, and the bottom of the arch foot section is connected with the movable steel wedge component.

[0008] As a further improvement of the above scheme, the arch section in the arch top section, the arch middle section and the arch foot section is composed of a box type structure of top plate, web and bottom plate, the box type structure full bridge height is equal, and the outer contour is consistent, and the top plate, the web and the bottom plate are connected with chamfer.

[0009] As a further improvement of the above scheme, the arch foot section and the arch middle section are provided with intermediate nodes, and the two symmetrical arch top sections are provided with arch top closing nodes.

[0010] As a further improvement of the above-mentioned scheme, the top of the arch foot section and the bottom of the arch middle section are provided with locally thickened reinforcing strips one and two, and a T-shaped section one is arranged between the reinforcing strips one and two.

[0011] As a further improvement of the above-mentioned scheme, the top of the arch top section is provided with locally thickened reinforcing strips three and four, a flange assembly is connected between the reinforcing strips three and four, and a T-shaped section two is arranged between the reinforcing strips three and four.

[0012] As a further improvement of the above-mentioned scheme, the T-shaped section one and the T-shaped section two are connected by wet joint method.

[0013] As a further improvement of the above-mentioned scheme, the arch top section, the arch middle section and the arch foot section are all connected with an upper arch column, and the bottom of the arch section at the bottom of the arch foot section is connected with a temporary steel roller.

[0014] As a further improvement of the above-mentioned scheme, the arch base is fixedly connected with a support column, one end of the support column is connected with the arch foot section, and the locking steel code plate is provided with a post-poured concrete connected with the arch base.

[0015] As a further improvement of the above-mentioned scheme, the movable steel wedge member is made of a stepped high-elastic material, and the arch foot section is connected with a sensor one and a sensor two.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] 1. The spliced arch top section, the arch middle section and the arch foot section can make the overall structure simple and reliable, the structure stress is reasonable, the installation is convenient, the large-span arch bridge which cannot be constructed by full support can be applied, the overall construction can be safely and stably carried out, the later maintenance is reduced, and the whole cycle life is prolonged.

[0018] 2. The new assembly type arch rib structure can be conveniently overhauled and maintained by various nodes, the operation is convenient, the rapid splicing construction is realized, and the bridge safety is ensured. DETAILED DESCRIPTION

[0019] Figure 1 It is a half structure schematic view of the utility model;

[0020] Figure 2 It is a structure schematic view of the arch middle section; Figure 1 It is an enlarged structure schematic view of the middle A;

[0021] Figure 3 It is a local main view schematic view of the utility model;

[0022] Figure 4 It is an arch middle section cross section schematic view;

[0023] Figure 5 is a schematic view of a section of the crown;

[0024] Figure 6 is a schematic view of an arch rib structure.

[0025] Main symbol explanation:

[0026] 01, arch seat; 02, post-cast concrete; 03, foundation pile; 04, temporary steel roller; 05, sensor one; 06, crown segment; 07, mid-arch segment; 08, arch foot segment; 09, upper arch column; 11, prefabricated steel plate; 13, movable steel wedge component; 14, support column; 15, steel wedge component; 16, locking steel spacer; 17, sensor two; 18, reinforcing bar one; 19, reinforcing bar two; 20, T-shaped section one; 21, reinforcing bar three; 22, reinforcing bar four; 23, flange assembly; 24, T-shaped section two; 25, chamfer. DETAILED DESCRIPTION

[0027] In the following, the utility model will be further described in conjunction with the drawings and the specific implementation, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0028] Embodiment 1:

[0029] Please combine Figure 1 - Figure 6 ,

[0030] A prefabricated and assembled UHPC box-shaped arch bridge, comprising: two arch seats 01, which are correspondingly provided, a plurality of support units are connected between the two arch seats 01, the support units are connected to each other to form an arch rib, the arch seat 01 supports, the support unit stabilizes, a stabilizing mechanism is arranged on the arch seat 01, the stabilizing mechanism is connected with the arch rib, which is a bridge main body, a plurality of foundation piles 03 are arranged, one end of the foundation pile 03 is connected with the arch seat 01, the foundation pile 03 is limited, and the overall safety is ensured.

[0031] The support unit is composed of the crown segment 06, the mid-arch segment 07 and the arch foot segment 08 which are spliced with each other, the mid-arch segment 07 is composed of a plurality of arch segments, the arch foot segment 08 at the bottom is connected with the stabilizing mechanism, the overall difficulty of construction is reduced by the multi-segment partition, which is convenient for transportation, hoisting, installation and later maintenance.

[0032] The stabilizing mechanism comprises: a prefabricated steel plate 11 inlaid on one side of the arch seat 01, the prefabricated steel plate 11 being connected with steel wedge members 15 and steel spacers 16, and the arch foot segment 08 being clamped between the two steel wedge members 15 and the steel spacers 16, one side of the steel spacer 16 being provided with post-cast concrete 02 connected with 01, a movable steel wedge member 13 being fixedly connected to the outer side of the arch seat 01, and the bottom of the arch foot segment 08 being connected with the movable steel wedge member 13, and the adjacent connecting surfaces being arranged in abutment, the connecting steel plates on the adjacent connecting surfaces corresponding to each other, the steel structures being connected, the steel spacers 16 being connected before installation is completed, and the post-cast concrete 02 being post-cast, and further limited.

[0033] The arch ribs in the arch top segment 06, the arch middle segment 07 and the arch foot segment 08 are all composed of a top plate, a web plate and a bottom plate to form a box structure, the box structures have equal full-bridge heights and consistent outer contours, the top plate, the web plate and the bottom plate are connected with chamfers 25, and the structure sizes of the top plate, the web plate and the bottom plate are calculated according to the actual use of the bridge to meet the corresponding stress requirements, thereby reducing the difficulty of the lower structure.

[0034] Intermediate nodes are arranged between the arch foot segment 08 and the arch middle segment 07, and arch top closing nodes are arranged between the two symmetrical arch top segments 06, so that high-altitude operation and hoisting difficulty are reduced, and the construction steps are optimized.

[0035] The top of the arch foot segment 08 and the bottom of the arch middle segment 07 are both provided with locally thickened reinforcing strips one 18 and two 19, and a T-shaped cross section one 20 is arranged between the reinforcing strips one 18 and two 19, the locally thickened reinforcing strips one 18 and two 19 increase the stress, and the T-shaped cross section one 20 ensures subsequent connection.

[0036] The top of the arch top segment 06 is provided with locally thickened reinforcing strips three 21 and four 22, and a flange assembly 23 is connected between the reinforcing strips three 21 and four 22, a T-shaped cross section two 24 is arranged between the reinforcing strips three 21 and four 22, the locally thickened reinforcing strips three 21 and four 22 increase the stress intensity, the steel flange assembly 23 is used to temporarily lock during installation, after the system is converted, the T-shaped cross section two 24 is installed, and the longitudinal parts are connected into an integral arch rib, and subsequent construction is performed.

[0037] The T-shaped cross section one 20 and the T-shaped cross section two 24 are connected by wet connection, and the wet connection process can safely, stably and quickly meet the installation needs.

[0038] The arch top segment 06, the arch middle segment 07 and the arch foot segment 08 are all connected with arch upper columns 09, the bottom of the arch rib at the bottom of the arch foot segment 08 is connected with a temporary steel roller shaft 04, and the arch upper columns 09 are used for installation of steel cables or other stress parts in the later stage.

[0039] The implementation principle of the embodiment of the present application is:

[0040] After the preliminary survey is completed, according to the calculation results, the reinforced concrete abutment 01 is constructed on the bridge site, and the prefabricated steel plate 11 and the steel wedge component 15 are pre-buried for temporary contact of the temporary steel roller shaft 04, and the box-shaped UHPC arch rib, i.e. the prefabricated arch segments of the arch crown segment 06, the arch middle segment 07 and the arch foot segment, is prefabricated in the prefabrication factory, then the arch foot segment 08 of the box-shaped UHPC prefabricated arch rib is hoisted into place, so that the temporary steel roller shaft 04 of the UHPC prefabricated arch rib arch foot segment 08 is temporarily in contact with the prefabricated steel plate 11 of the abutment 01, and the contact surface is fitted. Form a two-hinged arch state, after preliminary adjustment of the reasonable arch axis, the arch foot segment 08 naturally contacts the pre-buried steel plate 11 of the abutment end face, and the gap is filled with movable steel wedge component 13, then pushed into the support column 14, continue to adjust the reasonable arch axis, ensure that the prefabricated arch foot segment arch axis center line is perpendicular to the abutment 01 connecting surface, use steel spacer plate 16 to lock the arch foot, weld with the outer periphery of the arch foot segment 08 to form a hinge-free arch state, and then pour the post-poured concrete 02 to provide corresponding support to the bottom and provide a certain pre-pressure to complete the preliminary preparation;

[0041] After the steel spacer plate 16 and the support column 14 have stable supporting force, the hoisting is removed, then the arch middle segment 07 is hoisted, the T-shaped cross section one 20 is connected between the arch foot segment 08 and the arch middle segment 07 by wet method for assembly, then the arch crown segment 06 is hoisted, the T-shaped cross section one 20 is connected between the arch crown segment 06 and the arch middle segment 07 by wet method, finally the steel flange assembly 23 is temporarily locked between the two arch crown segments 06, after the system conversion, the T-shaped cross section two 24 is installed, connected by wet connection method, longitudinally connected into a whole arch rib, and subsequent construction is carried out.

[0042] Embodiment 2:

[0043] Combined Figures 1-6 , the embodiment further improves on the basis of embodiment 1:

[0044] The support column 14 is fixedly connected to the abutment 01, one end of the support column 14 is connected to the bottommost arch rib of the arch foot segment 08, the support column 14 provides auxiliary support to the bottom, optimizes the stress environment, and one side of the 16 is provided with the post-poured concrete 02 connected with the 01, and the 02 on one side is further limited to ensure the stability of the whole arch rib.

[0045] The movable steel wedge component 13 is made of stepped high-elastic material, the arch foot segment is connected with the sensor one 05 and the sensor two 17, the high-elastic material supports and buffers vibration, the sensor facilitates subsequent monitoring and maintenance, and the sensor is a combination of vibration sensors, pressure sensors, temperature and humidity sensors, etc.

[0046] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A prefabricated UHPC box arch bridge, characterized in that, include: There are two arch seats, and multiple support units are connected between the two arch seats. The support units are connected to each other to form arch ribs. A stabilizing mechanism is provided on the arch seat and is connected to the arch rib; Multiple foundation piles are installed, with one end of each pile connected to the arch abutment. The arch rib is composed of an arch crown section, an arch middle section, and an arch foot section that are spliced ​​together. The arch middle section is composed of multiple arch sections, and the arch foot section at the bottom is connected to the stabilizing mechanism. Stable institutions include: A precast steel plate is embedded on one side of the arch seat, and steel wedge members and locking steel plates are connected to the precast steel plate; The movable steel wedge component is fixedly connected to the outside of the arch seat, and the bottom of the arch foot section is connected to the movable steel wedge component.

2. The prefabricated UHPC box arch bridge as described in claim 1, characterized in that, The arch sections in the crown, middle, and foot sections are all composed of a box-shaped structure consisting of a top plate, a web plate, and a bottom plate. The box-shaped structure has the same height and consistent outer contour throughout the entire bridge, and the top plate, web plate, and bottom plate are connected by chamfers.

3. The prefabricated UHPC box arch bridge as described in claim 1, characterized in that, An intermediate node is provided between the arch foot section and the arch middle section, and an arch top closing node is provided between the two symmetrical arch top sections.

4. A prefabricated UHPC box arch bridge as described in claim 3, characterized in that, The top of the arch foot section and the bottom of the arch middle section are both provided with locally thickened reinforcing strips one and two, and a T-shaped section one is provided between reinforcing strips one and two.

5. A prefabricated UHPC box arch bridge as described in claim 3, characterized in that, The top of the arch section is provided with locally thickened reinforcing strips three and four, and a flange assembly is connected between reinforcing strips three and four. A T-shaped section two is provided between reinforcing strips three and four.

6. A prefabricated UHPC box arch bridge as described in claim 5, characterized in that, Both T-section one and T-section two are connected using a wet-jointing method.

7. A prefabricated UHPC box arch bridge as described in claim 1, characterized in that, The arch crown, arch middle and arch foot sections are all connected to arch columns, and the bottom of the arch section at the very bottom of the arch foot section is connected to a temporary steel roller.

8. A prefabricated UHPC box arch bridge as described in claim 1, characterized in that, A support column is fixedly connected to the arch seat, one end of which is connected to the arch foot section. One side of the locking steel plate is provided with post-cast concrete connected to the arch seat.

9. A prefabricated UHPC box arch bridge as described in claim 1, characterized in that, The movable steel wedge component is made of a stepped high-elastic material, and the arch foot section is connected to sensor one and sensor two.

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