Waterside arch bridge structure
By adopting bamboo piles and steel corrugated arch water town arch bridge structure, the difficulty and high cost of construction of stone arch bridges on the southern river channel is solved, and lightweight and efficient bridge construction is achieved, avoiding the impact on the river channel.
Patent Information
- Application Number
- CN202422831243.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-11-20
AI Technical Summary
The stone arch bridge is difficult to build on the southern river channel, the cost is high, and it affects the river channel ship during construction, and the existing technology is difficult to solve.
The water town arch bridge structure adopts bamboo piles and steel corrugated arches, including bamboo piles inserted into the weak soil on the river bank, the foundation and vertical wall are reinforced concrete, the steel corrugated arches are arranged across the river and fixed on the vertical wall, and the back of the abutment is equipped with improved soil, cement concrete base, isolation layer and reinforced concrete surface layer to form a lightweight and high-strength bridge structure.
The bridge weight and construction cost are reduced, the impact on the river channel during construction is avoided, and the construction efficiency and project progress are improved.
Smart Images
Figure CN223088258U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a water-town arch bridge structure, and more specifically, to a water-town arch bridge structure adopting bamboo piles and steel corrugated arches. Background Art
[0002] There are many densely distributed rivers in the south of China. In order to facilitate people's travel, bridges need to be built on the rivers. Stone arch bridges have the advantages of beautiful shape and strong bearing capacity, and have been favored by people since ancient times. There are also a large number of stone arch bridges distributed on the southern rivers. During the construction of a stone arch bridge, in order to lay the stone arch ring, it is first necessary to build an arch support in the river water so as to lay the stones forming the stone arch ring on the arch support.
[0003] Affected by the large self-weight of the stone arch ring, there are relatively high requirements for the bearing capacity of the foundations at both ends of the stone arch ring. Therefore, the construction of a stone arch bridge has the disadvantages of difficult construction, high cost, and affecting river navigation during construction. For this reason, the utility model proposes a water-town arch bridge structure adopting bamboo piles and steel corrugated arches. Summary of the Invention
[0004] The utility model provides a water-town arch bridge structure in order to overcome the above technical problems.
[0005] The water-town arch bridge structure of the utility model includes bamboo piles, a foundation, a retaining wall, and a steel corrugated arch which are arranged in sequence from bottom to top. The bamboo piles are inserted into the soft soil on both banks of the river. The foundation is fixed to the upper end of the bamboo piles, and the retaining wall is fixed to the foundation; the steel corrugated arch is laid across the river, and both ends of the steel corrugated arch are fixed to the retaining wall; an improved soil, a cement concrete base layer, an isolation layer, and a reinforced concrete surface layer are arranged on the steel corrugated arch and the back of the abutment. The improved soil is laid on the subgrade foundation of the back of the abutment and the steel corrugated arch. The cement concrete foundation is laid on the improved soil. The isolation layer is laid on the cement concrete base layer. The reinforced concrete surface layer is laid on the isolation layer.
[0006] The subgrade foundation of the back of the abutment of the water-town arch bridge structure of the utility model is composed of a stone-filled silt layer, a gravel layer, and a cement mortar layer which are arranged from bottom to top on the soft soil.
[0007] For the water-town arch bridge structure of the utility model, masonry retaining walls are arranged on both outer sides of the steel corrugated arch, the improved soil, the cement concrete base layer, the isolation layer, and the reinforced concrete surface layer.
[0008] The bamboo piles of the water-town arch bridge structure of the utility model are formed by long bamboo poles evenly inserted into the soft soil, and the depth of the long bamboo poles inserted into the foundation is not less than 10 times their diameters.
[0009] The water town arch bridge structure of the present utility model, wherein the foundation and the vertical wall are both of reinforced concrete structure. The concrete grade used for the foundation is 25 MPa - 30 MPa, and the concrete grade used for the vertical wall is 30 MPa - 35 MPa; channel steel anchor bars are embedded in the vertical wall, and unequal-leg channel steels fixedly connected to the channel steel anchor bars are fixed on the vertical wall.
[0010] The water town arch bridge structure of the present utility model, wherein the corrugated steel arch is semi-circular, the span of the corrugated steel arch is not more than 16 m, and the ends of the corrugated steel arch are connected to the unequal-leg channel steel through anchor bolts; the cross-section characteristic values of the corrugated steel arch are: wave pitch 68 mm, wave height 13 mm, wall thickness 1.6 mm - 2.0 mm, and section modulus 4.75 - 5.83 mm 3 / mm.
[0011] The water town arch bridge structure of the present utility model, wherein the improved soil is composed of soil doped with cement, and the compaction degree of the improved soil is not less than 92%; the thickness of the cement concrete base layer is 10 cm - 15 cm, and the concrete grade used for the cement concrete base layer is 10 MPa - 15 MPa.
[0012] The water town arch bridge structure of the present utility model, wherein the isolation layer is composed of an emulsified asphalt layer and a layer of geotextile arranged on the cement concrete base layer.
[0013] The water town arch bridge structure of the present utility model, wherein the thickness of the reinforced concrete surface layer is 12 cm - 15 cm, a steel bar mesh with a pore size of 20 cm * 20 cm is arranged in the middle of the reinforced concrete surface layer, and the steel bar mesh is composed of secondary steel bars with a diameter of 12 mm.
[0014] The water town arch bridge structure of the present utility model, wherein the thickness of the cement mortar layer is 3 cm - 5 cm, and the concrete grade used for the cement mortar layer is 10 MPa - 15 MPa.
[0015] The beneficial effects of the present utility model are as follows: The water town arch bridge structure of the present utility model includes bamboo piles, a foundation, a vertical wall, and a corrugated steel arch arranged from bottom to top. The bamboo piles are inserted into the soft soil to stably support the upper foundation and vertical wall. The two ends of the corrugated steel arch are fixed on the vertical wall. The improved soil, the cement concrete base layer, the isolation layer, and the reinforced concrete surface layer are sequentially arranged above the corrugated steel arch and the back of the bridge abutment to form the base layer and the surface layer of the bridge road; it can be seen that the water town arch bridge structure of the present utility model uses bamboo poles, which are easy to obtain in the south, as the pile foundation. Bamboo poles are a natural material with excellent characteristics such as light weight, high strength, and corrosion resistance, and are easy to obtain locally in the south. The corrugated steel arch is used to replace the stone arch, which greatly reduces the self-weight of the bridge. Compared with the stone arch bridge, there is no need to build an arch frame, and it will not affect the navigation of the river. It has the advantages of relatively simple structure, low cost, convenient construction, improved construction progress, and saved project cost.
[0016] Furthermore, the subgrade foundation at the back of the abutment adopts a stone-filled silt compaction layer, a gravel layer, and a cement mortar layer that are sequentially distributed from bottom to top. The stone-filled silt compaction layer is composed of larger stones thrown on the soft soil, and the gravel layer is laid on the stone-filled silt compaction layer, thus forming a stable subgrade foundation at the back of the abutment. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the water town arch bridge structure of the present utility model;
[0018] Figure 2 It is a schematic diagram of the connection part between the steel corrugated arch and the vertical wall in the present utility model.
[0019] In the figure: 1 bamboo pile, 2 foundation, 3 vertical wall, 4 improved soil, 5 cement concrete base course, 6 isolation layer, 7 reinforced concrete surface course, 8 steel corrugated arch, 9 stone masonry retaining wall, 10 channel steel anchor bar, 11 unequal-leg channel steel, 12 cement mortar layer, 13 gravel layer, 14 stone-filled silt compaction layer, 15 soft soil, 16 anchor bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0021] As Figure 1 shown, a structural schematic diagram of the water town arch bridge structure of the present utility model is given. It is composed of a bamboo pile 1, a foundation 2, a vertical wall 3, a steel corrugated arch 8, a stone-filled silt compaction layer 14, a gravel layer 13, a cement mortar layer 12, improved soil 4, a cement concrete base course 5, an isolation layer 6, a reinforced concrete surface course 7, and a stone masonry retaining wall 9. The bamboo pile 1 is composed of long bamboo poles evenly inserted into the soft soil 15 on both banks of the river. The foundation 2 is fixed at the upper end of the bamboo pile 1, and the vertical wall 3 is fixed on the foundation 2. Both the foundation 2 and the vertical wall 3 are of reinforced concrete structure. The steel corrugated arch 8 is in a semi-circular shape and spans across the river. Both ends of the steel corrugated arch 8 are fixed on the vertical wall 3. In this way, through the support of the bamboo pile 1, the foundation 2, and the vertical wall 3 for the steel corrugated arch 8, a stable "steel arch" structure is formed.
[0022] On the soft soil 15 on both sides of the shown bamboo pile 1, a stone-filled silt compaction layer 14, a gravel layer 13, and a cement mortar layer 12 are sequentially arranged from bottom to top. The stone-filled silt compaction layer 14 is composed of larger stones thrown on the soft soil 15, the gravel layer 13 is formed by gravel laid on the stone-filled silt compaction layer 14, and the cement mortar layer 12 is laid on the gravel layer 12. In this way, the stone-filled silt compaction layer 14, the gravel layer 13, and the cement mortar layer 12 form the subgrade foundation at the back of the abutment. Among them, the cement mortar layer 12 can prevent water from seeping upward into the improved soil 4 and avoid adverse effects on the road foundation.
[0023] The improved soil 4, cement concrete base layer 5, isolation layer 6 and reinforced concrete surface layer 7 are successively arranged on the back of the abutment and the corrugated steel arch 8. The improved soil 4 is laid on the back of the abutment and the corrugated steel arch 8. The improved soil 4 is composed of soil doped with cement, and the improved soil 4 is compacted after being laid. The cement concrete base layer 5 is laid on the improved soil 4, the isolation layer 6 is laid on the cement concrete base layer 5, and the isolation layer 6 can prevent the infiltration of rainwater from above. The reinforced concrete surface layer 7 is laid on the isolation layer 6 to form a firm surface layer structure of the bridge road.
[0024] The masonry retaining walls 9 are laid on both side surfaces of the improved soil 4, cement concrete base layer 5, isolation layer 6, reinforced concrete surface layer 7 and corrugated steel arch 8. In this way, the isolation layer 6, masonry retaining walls 9, cement mortar layer 12 and corrugated steel arch 8 realize the wrapping of the internal improved soil 4 and cement concrete base layer 5 to prevent the infiltration of external moisture, which is beneficial to ensuring the long-term stability and durability of the bridge structure.
[0025] It can be seen that the water town arch bridge structure of the present utility model uses the corrugated steel arch 8 to replace the "stone arch", which not only has the advantage of light self-weight, but also does not require the erection of an arch frame during the construction process, so it does not affect the navigation of the river, and has the advantages of low cost and high construction efficiency. At the same time, due to the light weight of the corrugated steel arch 8, the bamboo piles 1 inserted into the soft soil 15 can be used to firmly support the bridge body. The bamboo piles 1 have excellent properties such as light weight, high strength and corrosion resistance, and are easy to obtain locally in the south.
[0026] In order to realize the stable support of the vertical wall 3 for the corrugated steel arch 8, the two ends of the corrugated steel arch 8 need to be firmly fixed on the vertical wall 3. As Figure 2 shown, the schematic diagram of the connection part between the corrugated steel arch and the vertical wall in the present utility model is given. The channel steel anchor bars 10 are embedded in the vertical wall 3 shown, and the unequal-leg channel steel 11 is arranged at the upper part of the vertical wall 3. The unequal-leg channel steel 11 is welded and fixed to the channel steel anchor bars 10, and the lower end of the corrugated steel arch 8 is connected to the unequal-leg channel steel 11 through the anchor bolts 16. In this way, the firm connection between the corrugated steel arch 8 and the vertical wall 3 is realized.
[0027] Among them, the bamboo piles 1 are formed by long bamboo poles evenly inserted into the soft soil 15, and the depth of the long bamboo poles inserted into the foundation is not less than 10 times their diameter. The foundation 2 and the vertical wall 3 are both of reinforced concrete structure. The concrete grade used for the foundation 2 is 25MPa - 30MPa, and the concrete grade used for the vertical wall 3 is 30MPa - 35MPa. The corrugated steel arch 8 is semi-circular, the span of the corrugated steel arch 8 is not more than 16m, and the cross-sectional characteristic values of the corrugated steel arch 8 are: wave pitch 68mm, wave height 13mm, wall thickness 1.6mm - 2.0mm, and section modulus is 4.75 - 5.83mm 3 / mm.
[0028] The improved soil 4 is composed of soil doped with cement, such as the cement content is 5%-8%, and the compaction degree of the improved soil 4 is not less than 92%. The thickness of the cement concrete base layer 5 is 10 cm to 15 cm, and the concrete grade used for the cement concrete base layer 5 is 10 MPa to 15 MPa. The isolation layer 6 is composed of an emulsified asphalt layer and a geotextile layer laid on the cement concrete base layer 5.
[0029] The thickness of the reinforced concrete surface layer 7 is 12 cm to 15 cm. A steel bar mesh with a pore size of 20 cm * 20 cm is arranged in the middle of the reinforced concrete surface layer 7. The steel bar mesh is composed of secondary steel bars with a diameter of 12 mm. The thickness of the cement mortar layer 12 is 3 cm to 5 cm, and the concrete grade used for the cement mortar layer 12 is 10 MPa to 15 MPa.
Claims
1. A water town arch bridge structure, characterized in that: It includes bamboo piles (1), a foundation (2), a vertical wall (3) and a steel corrugated arch (8) arranged successively from bottom to top. The bamboo piles are inserted into the soft soil (15) on both banks of the river channel. The foundation is fixed to the upper end of the bamboo piles, and the vertical wall is fixed to the foundation. The steel corrugated arch is laid across the river, and both ends of the steel corrugated arch are fixed to the vertical wall. An improved soil (4), a cement concrete base layer (5), an isolation layer (6) and a reinforced concrete surface layer (7) are provided on the steel corrugated arch and the back of the abutment. The improved soil is laid on the subgrade foundation of the back of the abutment and the steel corrugated arch. The cement concrete base is laid on the improved soil. The isolation layer is laid on the cement concrete base layer. The reinforced concrete surface layer is laid on the isolation layer.
2. The water town arch bridge structure according to claim 1, characterized in that: The subgrade foundation of the back of the abutment is composed of a stone-filled silt layer (14), a gravel layer (13) and a cement mortar layer (12) arranged from bottom to top on the soft soil (15).
3. The water town arch bridge structure according to claim 1 or 2, characterized in that: Stone retaining walls (9) are provided on both outer sides of the steel corrugated arch (8), the improved soil (4), the cement concrete base layer (5), the isolation layer (6) and the reinforced concrete surface layer (7).
4. The water town arch bridge structure according to claim 1 or 2, characterized in that: The bamboo piles (1) are formed by long bamboo poles evenly inserted into the soft soil (15), and the depth of the long bamboo poles inserted into the foundation (2) is not less than 10 times their diameter.
5. The water town arch bridge structure according to claim 1 or 2, characterized in that: Both the foundation (2) and the vertical wall (3) are of reinforced concrete structure. The concrete grade used for the foundation is 25MPa - 30MPa, and the concrete grade used for the vertical wall is 30MPa - 35MPa. Channel steel anchor bars (10) are embedded in the vertical wall, and unequal-leg channel steels (11) fixedly connected to the channel steel anchor bars are fixed on the vertical wall.
6. The water town arch bridge structure according to claim 5, characterized in that: The steel corrugated arch (8) is semi-circular, the span of the steel corrugated arch is not greater than 16 m, and the end of the steel corrugated arch is connected to the unequal-leg channel steel (11) through the anchor screw (16); the cross-sectional characteristic values of the steel corrugated arch are: the wave pitch is 68 mm, the wave height is 13 mm, the wall thickness is 1.6 mm to 2.0 mm, and the section modulus is 4.75 to 5.83 mm 3 / mm.
7. The water town arch bridge structure according to claim 1 or 2, characterized in that: The improved soil (4) is composed of soil doped with cement, and the compaction degree of the improved soil is not less than 92%. The thickness of the cement concrete base layer (5) is 10cm - 15cm, and the concrete grade used for the cement concrete base layer is 10MPa - 15MPa.
8. The water town arch bridge structure according to claim 1 or 2, characterized in that: The isolation layer (6) is composed of an emulsified asphalt layer and a layer of geotextile laid on the cement concrete base layer (5).
9. The water town arch bridge structure according to claim 1 or 2, characterized in that: The thickness of the reinforced concrete surface layer (7) is 12cm - 15cm. A steel bar mesh with a pore size of 20cm * 20cm is arranged in the middle of the reinforced concrete surface layer, and the steel bar mesh is composed of secondary steel bars with a diameter of 12mm.
10. The water town arch bridge structure according to claim 2, characterized in that: The thickness of the cement mortar layer (12) is 3cm - 5cm, and the concrete grade used for the cement mortar layer is 10MPa - 15MPa.