Bridge landscape guardrail section street lamp foundation installation system under special conditions

Abstract

The invention relates to a bridge landscape guardrail section street lamp foundation mounting system under special conditions, which comprises a bottom flange plate and an L-shaped plate, the bottom flange plate is partially mounted on a beam plate, and partially overhung out of the beam plate; the bottom end of the street lamp stand column is fixed to the bottom flange plate through the column foot chassis. The top end of the L-shaped plate is fixed at the bottom of the overhanging part of the bottom flange plate, and a bottom plate of the L-shaped plate extends below the beam plate; the column foot chassis, the beam plate and the L-shaped plate are connected in a penetrating mode through a first opposite-penetrating bolt. The connecting structure has the beneficial effects that the limited space of the edge of the beam plate on the outer side of the landscape guardrail is fully utilized, the edge of the beam plate is clamped and fixed through the bottom flange plate and the L-shaped clamping plate, the L-shaped clamping plate and the stiffening plate are additionally arranged in consideration of the ultrathin beam plate to improve the system stability, and the column base chassis, the beam plate and the L-shaped plate are vertically connected in a penetrating mode through the first opposite-penetrating bolts; by means of the structure, the street lamp stand column can be effectively prevented from toppling towards the outer side of the beam plate, transverse bolts do not need to be arranged, the thin beam plate can be fixed, and use and safety of the landscape guardrail are not affected.

Description

Technical Field

[0001] The invention belongs to the field of bridge street lamps, and in particular relates to a bridge landscape guardrail section street lamp foundation installation system under special conditions. Background Art

[0002] Traditional bridge landscape guardrail section street lights are installed in the side strips of reinforced concrete foundations, cantilevered on the outside with the help of corbels, welded to the top of the guardrail with flanges, or anchored to the disconnected parts of the guardrail with flanges. However, these installation methods are neither economical nor aesthetically pleasing, and are obviously inappropriate today when landscape requirements are getting higher and higher.

[0003] For example, CN211200074U proposes a bridge section external lighting street lamp installation structure, which obviously protrudes from the outside of the bridge. The structure is connected to the bridge with horizontal bolts. Its strength is heavily dependent on the concrete guardrail of the bridge. Therefore, additional requirements are placed on the strength of the guardrail. It is not applicable to some bridges that only have railings installed as guardrails or have low guardrail strength. If used directly, not only will the construction workload be large and the aesthetics be poor, it may even damage the basic structure of the bridge and guardrail, causing safety hazards.

[0004] To sum up, the existing conventional street lamp foundation installation system for bridge landscape guardrail sections is neither economical nor aesthetically pleasing, and it is difficult to meet the aesthetic requirements of landscape resources. Therefore, the project construction urgently needs an economical street lamp foundation installation system that does not affect environmental protection and appearance to overcome the above shortcomings. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a bridge landscape guardrail section street lamp foundation installation system under special conditions.

[0006] The basic installation system of the street lamp in the bridge landscape guardrail section under this special condition includes: a bottom flange and an L-shaped plate, wherein the bottom flange is partially installed on the beam plate and partially cantilevered outside the beam plate; the bottom end of the street lamp column is fixed to the bottom flange through the column foot bottom plate;

[0007] The top of the L-shaped plate is fixed to the bottom of the cantilevered part of the bottom flange, and the bottom plate of the L-shaped plate extends below the beam plate; the column foot chassis, the beam plate and the L-shaped plate are connected through a first pair of through bolts; the cantilevered part of the bottom flange is fixed to the column foot chassis through a second pair of through bolts.

[0008] Preferably, the height of the vertical side panels of the L-shaped panel corresponds to the thickness of the beam panel.

[0009] Preferably, the street lamp column is arranged on the outside of the landscape guardrail beam between two adjacent landscape columns.

[0010] Preferably, the width of the bottom plate of the L-shaped plate is greater than or equal to half of the bottom flange, and at least half of the area of ​​the projection of the street lamp column on the horizontal plane is located on the beam plate.

[0011] Preferably, the outer side of the L-shaped plate is fixedly connected to the cantilevered portion of the bottom flange through the second stiffening plate.

[0012] The construction method of the bridge landscape guardrail section street light foundation installation system under this special condition includes the following steps:

[0013] Step 1: Fix the bottom end of the street lamp column to the center of the column foot chassis to form component 1; fix the L-shaped plate to the bottom of the bottom flange according to the thickness of the beam plate to form component 2, and form a beam plate slot between the L-shaped plate and the bottom flange;

[0014] Step 2: Open cable holes on the column base and the bottom flange. The cable holes are opened within the projection range of the street lamp column outside the L-shaped plate.

[0015] Step 3: Clamp component 2 to the edge of the beam plate so that the beam plate is sandwiched between the bottom flange and the L-shaped plate;

[0016] Step 4: Move component 1 to above component 2, and fix component 1 and component 2 with the first pair of through bolts and the second pair of through bolts;

[0017] Step 5: Fill polymer mortar between component 2 and the beam and slab.

[0018] Preferably, the cable hole is located within the projection range of the street lamp column cantilevered outside the beam slab, and the cable is passed through the cable hole into the street lamp column.

[0019] The beneficial effects of the present invention are:

[0020] 1) The present invention makes full use of the limited space at the edge of the beam slab outside the landscape guardrail, and uses the bottom flange and L-shaped clamping plate to clamp the edge of the beam slab. Considering the ultra-thin beam slab and adding the L-shaped clamping plate and stiffening plate to improve the stability of the system, the column foot chassis, the beam slab and the L-shaped plate are vertically connected by the first pair of through bolts, which can effectively prevent the street lamp column from tipping over to the outside of the beam slab, and there is no need to set horizontal bolts, so that the thinner beam slab can be fixed, and the use and safety of the landscape guardrail itself are not affected.

[0021] 2) The bottom flange of the column foot chassis of the present invention is fixed to the edge of the beam slab outside the landscape guardrail by through bolts, forming a complete street lamp foundation installation system under special conditions, which is not only suitable for newly built sections, but also for the reconstruction sections of existing bridges. It not only does not occupy the bridge road space at all, but also does not excessively occupy the space outside the beam slab, and has good integrity. At the same time, the semi-cantilevered chassis is convenient for directly setting cable holes without destroying the original beam slab structure, so that the cables can be set in the street lamp columns, further improving the aesthetics of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Cross-section diagram of the streetlight foundation installation system in the bridge landscape guardrail section;

[0023] Figure 2 Side view of the streetlight foundation installation system for the bridge landscape guardrail section;

[0024] Figure 3 The plan of the street light foundation installation system for the bridge landscape guardrail section;

[0025] Figure 4 Large drawing of the first stiffening plate;

[0026] Figure 5 Large drawing of the second stiffening plate;

[0027] Figure 6 Large-scale drawing of the L-shaped plate.

[0028] Explanation of the reference numerals: street lamp column 1, first stiffening plate 2, first pair of through bolts 3, second pair of through bolts 4, column foot chassis 5, bottom flange 6, second stiffening plate 7, L-shaped plate 8, beam plate 9, landscape column 10, landscape guardrail crossbeam 11, bridge deck pavement layer 12, cable hole 13. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0030] Embodiment 1

[0031] As an example, Figures 1 to 6 As shown, the basic installation system of the street lamp in the bridge landscape guardrail section under this special condition is installed in the limited and cramped space under the landscape guardrail beam, including: a bottom flange 6 and an L-shaped plate 8, half of the bottom flange 6 is fixed on the beam plate 9, and the other half is cantilevered outside the beam plate 9; the bottom end of the street lamp column 1 is fixed on the bottom flange 6 through the column foot chassis 5; Figure 3 As shown, at least half of the area of ​​the street lamp column 1 in the projection on the horizontal plane is located on the beam plate 9.

[0032] The top of the L-shaped plate 8 is fixed to the bottom of the cantilevered part of the bottom flange 6, and the bottom plate of the L-shaped plate 8 extends below the beam plate 9. The outer side of the L-shaped plate 8 is fixedly connected to the cantilevered part of the bottom flange 6 through the second stiffening plate 7 to cope with the larger wind load along the lake.

[0033] The height of the L-shaped plate 8 is temporarily set at 120mm. The on-site construction should be adjusted accordingly according to the thickness of the cantilever plate so that the height of the vertical side plate of the L-shaped plate 8 corresponds to the thickness of the beam plate 9. After the L-shaped plate 8 and the bottom flange 6 clamp the beam plate 9, the gap between the L-shaped plate 8 and the concrete beam plate 9 should be filled and compacted with epoxy mortar.

[0034] The column foot chassis 5, the beam plate 9 and the L-shaped plate 8 are connected and fixed through a first pair of through bolts 3. The cantilevered portion of the bottom flange 6 is fixed to the column foot chassis 5 through a second pair of through bolts 4.

[0035] In this embodiment, the street lamp column 1 is arranged outside the landscape guardrail beam 11 between two adjacent landscape columns 10. The column foot chassis 5 and the bottom flange 1 are both square, with a side length of 40 cm, of which 20 cm is cantilevered outside the beam plate, and the other 20 cm is placed on the beam plate 9 outside the landscape guardrail beam 11. And this part of the column foot chassis 5 and the bottom flange 1 are arranged outside the landscape guardrail beam 11, which will not affect the aesthetics of the main road part of the bridge, nor occupy the road space.

[0036] Four double bolt holes are opened at the corresponding positions of the column base plate 5 and the bottom flange plate 6, and corresponding bolt holes are also opened on the L-shaped plate 8. The column base plate 5 and the bottom flange plate 6 have a side length of 40 cm and a thickness of 2 cm. They are suspended 20 cm outside the beam plate. The column base plate 5 and the bottom flange plate 6 are fixed and connected with four through bolts, among which the second through bolts 4 are used to connect the cantilevered outside the beam plate 9, and the first through bolts 3 are used to fix the part placed on the beam plate 9. At the same time, the L-shaped plate 8 is fixed so that there is also support under the bottom flange plate 6 cantilevered outside the beam plate 9.

[0037] The length of the bottom side of the L-shaped plate 8 is greater than or equal to half of the bottom flange 6 but does not completely cover the projection range of the street lamp column 1, so that the center of gravity of the entire structure after installation falls on the beam plate 9 as much as possible, and the leftover space is convenient for the cable routing in the street lamp column 1. A 5cm hole is opened in the middle of the column base 5 and the bottom flange 6 close to the edge of the beam plate 9 as a cable hole 13 for routing cables. The cable hole 13 overlaps with the projection range of the street lamp column 1 cantilevered outside the beam plate 9.

[0038] Embodiment 2

[0039] Taking Chun'an as an example, the Qiandao Lake Greenway has high requirements for environmental protection and landscape. The Qiandao Lake Greenway project for non-motorized vehicles is located in an ecologically sensitive area, and the project construction has dual pressures of environmental protection and landscape. Based on the first embodiment, this second embodiment proposes a more specific bridge landscape guardrail section street light foundation installation system under special conditions:

[0040] Taking into account the better stress state of the system, the limited space of the landscape guardrail and the requirements of the reserved bottom cable hole groove, a semi-suspended bottom flange 6 is adopted; at the same time, this project is a greenway dedicated to pedestrians and bicycles. The thickness of the designed beam and slab is only 12cm, which is much smaller than the conventional beam and slab thickness of 20cm. The conventional connection scheme of transverse bolts + linear plywood structure is easy to break the beam and slab concrete and cannot be implemented.

[0041] In this embodiment, the L-shaped plate 8 and the bottom flange 6 are used to wrap the edge of the beam plate 9, and the second stiffening plate 7 is placed on the lower side of the bottom flange plate 6. The second stiffening plate 7, the L-shaped plate 8 and the bottom flange plate 6 are processed and welded in the factory and then transported to the site for installation. The first pair of through bolts 3 can be fully shared to wrap the outer beam plate 9 of the guardrail. The gap between the L-shaped plate 8 and the beam plate 9 is filled with polymer mortar to assist in supporting the bottom flange plate 6 and improve its stability. The bottom side of the L-shaped plate 8 is 20 cm long, the same width as the bottom flange plate 6, the thickness is 1.6 cm, and the height is 12 cm. Figure 6 As shown; the second stiffening plate 7 is a variant trapezoid, two symmetrically arranged to prevent shaking on both sides of the street lamp column 1, a height of 16.4cm, a short side length of 5cm, a long side length of 10cm, such as Figure 4 As shown, a triangular hole with a side length of 1.5 cm is opened at the bottom corner of the second stiffening plate 7 between the L-shaped plate 8 and the bottom flange 6 to avoid stress concentration. The thickness of the second stiffening plate 7 is 1.2 cm.

[0042] The L-shaped plate 8 shares the first pair of through bolts 3 with the column foot base 5 and the bottom flange 6, which not only ensures the integrity of the beam-slab 9 structure to the greatest extent, but also saves cost and is easy to construct. At the same time, since the contact parts between the bottom flange 6, the L-shaped plate 8 and the beam-slab 9 are not easy to inspect, polymer mortar is used to fill them densely to avoid water accumulation and corrosion.

[0043] The stiffening plate 2 is fixed on the column base 5 and is symmetrically placed on four sides around the street lamp column 1. The stiffening plate 2 is a modified trapezoid, such as Figure 5 As shown, the stiffening plate 2 has a top width of 3 cm, a bottom width of 5 cm, a height of 8 cm, and a triangular hole with a right angle opening of 1.5 cm in length at the bottom.

[0044] The street lamp system proposed in this embodiment was successfully implemented on the approximately 8km greenway trestle of this project, and achieved good economic and social benefits.

[0045] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0046] Embodiment 3

[0047] As another embodiment, based on the first and second embodiments, the third embodiment proposes a construction method for the bridge landscape guardrail section street lamp foundation installation system under such special conditions, including the following steps:

[0048] Step 1: Bolt holes are provided at four corners of the column base plate 5 and the bottom flange plate 6, and the bolt holes on the column base plate 5 and the bottom flange plate 6 are aligned.

[0049] After being customized according to the form and specifications required by the design, it is transported to the site and then assembled and welded in combination with the actual situation of the edge of the beam 9 to form a stable structure. The lower end of the specific street lamp column 1 is milled flat and closely combined with the column foot chassis 5 to form a component.

[0050] The bottom of the bottom flange 6 is fixed with an L-shaped plate 8 to form component 2. The L-shaped plate 8 is rechecked on site according to the size of the beam plate 9 and can be assembled after cutting as needed. All connecting welds are required to be grade 2, with a weld height of 10 mm and not less than the minimum plate thickness.

[0051] Step 2: Open cable holes 13 on the column base 5 and the bottom flange 6 accordingly. The cable holes 13 are opened within the projection range of the street lamp column 1 outside the L-shaped plate 8.

[0052] Step 3: Clear the debris under the bottom plate of the lamp post, remove the bridge deck pavement 12, mill it flat, and make it dry. Then, clear the debris, mill it flat, and dry the beam slab 9 that the component 2 contacts. Then, assign dedicated personnel to command the component 1 and component 2, respectively, and coordinate the construction on site. Clamp the component 2 to the edge of the beam slab 9, so that the beam slab 9 is sandwiched between the bottom flange 6 and the L-shaped plate 8. Figure 3 shown.

[0053] Step 4, move component 1 to above component 2, connect component 1 and component 2 through the first pair of through bolts 3 and the second pair of through bolts 4; adjust the reserved bolt holes of the column base 5, the bottom flange 6, and the L-shaped plate 8 several times, and then synchronize and uninterruptedly align the first pair of through bolts 3 and the second pair of through bolts 4, and stabilize the street lamp foundation through repeated balanced adjustments, so that the street lamp pole 1 is vertically stable.

[0054] pass Figure 3 The cable is passed through the cable holes 13 on the column base 5 and the bottom flange 6 to the street lamp column 1.

[0055] Step 5: Use polymer mortar to fill the gap between the bottom flange 6, the L-shaped plate 8 and the beam plate 9 to prevent water accumulation and corrosion on the L-shaped plate 8 close to the beam plate 9 to meet the strength requirements for stability inspection.

[0056] It should be noted that the parts in this embodiment that are the same or similar to those in Embodiments 1 and 2 can be referenced to each other and will not be described in detail in this application.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A bridge landscape guardrail section street lamp foundation installation system under special conditions, characterized in that: include: Bottom flange and L-shaped plate, the bottom flange is partially installed on the beam plate, and partially cantilevered outside the beam plate; the bottom end of the street lamp column is fixed to the bottom flange through the column foot bottom plate; The top of the L-shaped plate is fixed to the bottom of the cantilevered part of the bottom flange, and the bottom plate of the L-shaped plate extends below the beam plate; the column foot chassis, the beam plate and the L-shaped plate are connected through a first pair of through bolts; the cantilevered part of the bottom flange is fixed to the column foot chassis through a second pair of through bolts.

2. According to the special conditions of claim 1, a bridge landscape guardrail section street lamp foundation installation system is characterized in that: The height of the vertical side plate of the L-shaped plate corresponds to the thickness of the beam plate.

3. According to the special conditions of the bridge landscape guardrail section street lamp foundation installation system of claim 1, it is characterized in that: The street lamp column is arranged on the outside of the landscape guardrail beam between two adjacent landscape columns.

4. According to the special conditions of the bridge landscape guardrail section street lamp foundation installation system of claim 1, it is characterized in that: The width of the bottom plate of the L-shaped plate is greater than or equal to half of the bottom flange, and at least half of the area of ​​the projection of the street lamp column on the horizontal plane is located on the beam plate.

5. According to the special conditions of the bridge landscape guardrail section street lamp foundation installation system of claim 1, it is characterized in that: The outer side of the L-shaped plate is fixedly connected through the second stiffening plate and the cantilevered part of the bottom flange.

6. A construction method for a bridge landscape guardrail section street lamp foundation installation system under special conditions as described in any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Fix the bottom end of the street lamp column to the center of the column foot chassis to form component 1; fix the L-shaped plate to the bottom of the bottom flange according to the thickness of the beam plate to form component 2, and form a beam plate slot between the L-shaped plate and the bottom flange; Step 2: Open cable holes on the column base and the bottom flange. The cable holes are opened within the projection range of the street lamp column outside the L-shaped plate. Step 3: Clamp component 2 to the edge of the beam plate so that the beam plate is sandwiched between the bottom flange and the L-shaped plate; Step 4: Move component 1 to above component 2, and fix component 1 and component 2 with the first pair of through bolts and the second pair of through bolts; Step 5: Fill polymer mortar between component 2 and the beam and slab.

7. The construction method of a bridge landscape guardrail section street lamp foundation installation system under special conditions according to claim 6 is characterized in that: The cable hole is located within the projection range of the street lamp column cantilevered outside the beam slab, and the cable is passed through the cable hole into the street lamp column.

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