Reinforcing structure of bridge concrete enlarged foundation

Abstract

The reinforcing structure of the bridge concrete enlarged foundation comprises a broken stone hardcore, the concrete enlarged foundation and a wall body which are sequentially arranged from bottom to top, and is characterized in that the concrete enlarged foundation is composed of an original bridge enlarged foundation and a new widened foundation, and the new widened foundation is connected with the original bridge enlarged foundation through anchoring ribs; a pile foundation which penetrates through the broken stone hardcore and is inserted into the foundation is arranged below the concrete expanded foundation, and the pile foundation supports the original bridge expanded foundation and the new widened foundation at the same time. According to the reinforcing structure of the bridge concrete enlarged foundation, widening of an original bridge enlarged foundation is achieved, and the pile foundation which penetrates through the broken stone hardcore and extends into the ground is arranged below the concrete enlarged foundation, so that the pile foundation cannot be settled under the conditions that a bridge road is widened and the weight is increased; and the requirement of bridge widening construction on the bearing capacity of the bridge foundation is met, and the service life of the bridge is ensured.

Description

Technical Field

[0001] This utility model relates to a reinforcement structure for an enlarged foundation, and more specifically, to a reinforcement structure for a concrete enlarged foundation of a bridge. Background Technology

[0002] With the rapid development of my country's economy, the number of motor vehicles in my country has been increasing year by year. In many areas, the number of cars exceeds the carrying capacity of roads, causing existing highways to be unable to meet traffic requirements and necessitating the widening of existing highways. When widening existing highways, especially elevated sections, the construction of correspondingly widened bridges is also increasing. Because the original bridges often cannot meet the current bridge design standards, it is necessary to reinforce and upgrade the old bridges.

[0003] In the process of widening existing bridges, demolishing and rebuilding the original bridge foundation is not only time-consuming but also significantly increases the cost of widening the bridge, hindering the conservation of manpower, materials, and resources. However, widening and enlarging the existing bridge foundation, and then installing pile foundations for support beneath the widened foundation, will ensure that the enlarged foundation meets the required strength, thus saving manpower and materials. Therefore, this utility model proposes a reinforcement structure for a bridge concrete enlargement foundation that widens the existing foundation. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides a reinforcement structure for the concrete widened foundation of a bridge.

[0005] The present invention relates to a reinforcement structure for a bridge concrete enlarged foundation, comprising, from bottom to top, a crushed stone cushion layer, a concrete enlarged foundation, and a wall. The crushed stone cushion layer is located below the groundwater level, while the concrete enlarged foundation and the wall are located above the groundwater level. The concrete enlarged foundation is characterized by comprising an original bridge enlarged foundation and a newly widened foundation located outside the original bridge enlarged foundation. The newly widened foundation is connected to the original bridge enlarged foundation via evenly distributed anchor bars. A pile foundation is installed below the concrete enlarged foundation, penetrating the crushed stone cushion layer and inserting into the ground, thereby simultaneously supporting both the original bridge enlarged foundation and the newly widened foundation.

[0006] The present invention relates to a reinforcement structure for a bridge concrete enlarged foundation, wherein the pile foundation is a high-pressure jet grouting pile with a diameter of 1.0m to 1.2m.

[0007] The present invention relates to a reinforcement structure for a bridge concrete widening foundation, wherein the concrete widening foundation is provided with vertical reserved pipes for pile foundation construction, half of which is located in the original bridge widening foundation and the other half is located in the newly widened foundation.

[0008] The present invention relates to a reinforcement structure for a bridge concrete widened foundation, wherein the newly widened foundation is set on two sides in the width direction of the original bridge widened foundation, and the thickness and length of the newly widened foundation are equal to those of the original bridge widened foundation.

[0009] The present invention relates to a reinforcement structure for a bridge concrete widened foundation, wherein the shown crushed stone cushion layer consists of the original bridge crushed stone cushion layer and a newly widened crushed stone cushion layer located on the outside of the original bridge.

[0010] The present invention relates to a reinforcement structure for a bridge concrete enlarged foundation, wherein reserved pipes on the same side of the concrete enlarged foundation are arranged at equal intervals, and the diameter of the reserved pipes is 10cm~12cm.

[0011] The present invention relates to a reinforcement structure for a bridge concrete enlarged foundation, wherein the reserved pipe is filled with concrete of the same grade as the original bridge enlarged foundation, which is sealed to it. The concrete in the reserved pipe is poured 7 days after the pile foundation construction is completed.

[0012] The present invention relates to a reinforcement structure for a bridge concrete enlarged foundation, wherein the wall is a masonry wall or a reinforced concrete wall.

[0013] The beneficial effects of this utility model are as follows: The reinforced structure of the bridge concrete enlarged foundation of this utility model consists of pile foundations, crushed stone cushion layer, concrete enlarged foundation and wall body arranged sequentially from bottom to top. The concrete enlarged foundation is formed by arranging a newly widened foundation on the outside of the original bridge enlarged foundation, and the newly widened foundation is fixedly connected to the original bridge enlarged foundation by anchor bars. In this way, the original bridge enlarged foundation is widened in the width direction, increasing the bearing capacity of the formed concrete enlarged foundation. At the same time, by setting pile foundations that pass through the crushed stone cushion layer and extend into the ground below the concrete enlarged foundation, the newly widened foundation and the original bridge enlarged foundation are supported, ensuring stable support for the concrete enlarged foundation and wall body above, so that they will not settle when the bridge is widened and the weight increases. This meets the requirements of bridge foundation bearing capacity for bridge widening construction and ensures the service life of the bridge. Attached Figure Description

[0014] Figure 1 This is a front view of the reinforcement structure for the bridge concrete enlarged foundation of this utility model;

[0015] Figure 2 This is a top view of the reinforcement structure for the bridge concrete enlarged foundation of this utility model.

[0016] In the diagram: 1. Crushed stone cushion layer, 2. Concrete spread foundation, 3. Wall, 4. Pile foundation, 5. Reserved pipe, 6. Anchor bar, 7. Groundwater level, 8. Original bridge spread foundation, 9. Newly widened foundation. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 and Figure 2 As shown, the front view and top view of the reinforcement structure of the bridge concrete enlarged foundation of this utility model are given respectively. Figure 2 The crushed stone cushion layer 1 is not shown in the diagram. The reinforced structure of the bridge concrete spread foundation shown consists of pile foundations 4, crushed stone cushion layer 1, concrete spread foundation 2, and wall 3 arranged sequentially from bottom to top. The crushed stone cushion layer 1 is located below the groundwater level 1, while the concrete spread foundation 2 and wall 3 are located above the groundwater level 7. The wall 3 serves as a pier for the bridge. The concrete spread foundation 2 shown consists of the original bridge spread foundation 8 and a newly widened foundation 9 located outside the original bridge spread foundation 8.

[0019] Normally, such as Figure 2 As shown, only the width of the original bridge expansion foundation 8 needs to be widened. Therefore, the new widened foundation 9 is only installed on two sides of the original bridge expansion foundation 8 in the width direction. The thickness and length of the new widened foundation 9 are equal to those of the original bridge expansion foundation 8. The new widened foundation 9 is connected by evenly distributed anchor bars 6. During construction, the anchor bars 6 are first inserted on the two sides of the original bridge expansion foundation 8 in the width direction, and then the new widened foundation 9 is poured.

[0020] It is evident that adding a newly widened foundation 9 to the original bridge widened foundation 8 is equivalent to increasing the cross-sectional area of ​​the resulting concrete widened foundation 2, thereby increasing its load-bearing capacity. Typically, after widening the original bridge widened foundation 8, the underlying crushed stone cushion layer 1 also needs to be widened accordingly. Therefore, the crushed stone cushion layer 1 shown consists of the original bridge crushed stone cushion layer and the newly widened crushed stone cushion layer. The thickness of the newly widened crushed stone cushion layer is equal to the thickness of the original bridge crushed stone cushion layer, ensuring that the outer edge of the crushed stone cushion layer 1 protrudes a certain distance from the concrete widened foundation 2 above it.

[0021] After the original bridge widening foundation 8 was widened, in order to ensure that the original bridge widening foundation 8 and the newly widened foundation 9 have stable bearing capacity and will not settle under the increased load from above, pile foundation 4 was also installed to support them simultaneously. Pile foundation 4 adopts high-pressure jet grouting piles. The pile foundation 4 shown penetrates the crushed stone cushion layer 1 and extends into the foundation below. The upper end of the pile foundation 4 forms a pile foundation that simultaneously supports the original bridge widening foundation 8 and the newly widened foundation 9, so as to ensure that the concrete widening foundation 2 and the wall 3 will not settle under the increased load caused by the widening of the bridge and road.

[0022] In order to form a high-pressure jet grouting pile foundation 4, a vertical reserved pipe 5 is provided in the concrete enlarged foundation 2 shown. Half of the reserved pipe 5 is located in the original bridge enlarged foundation 8, and the other half is located in the newly widened foundation 9. In this way, after the high-pressure jet grouting pile foundation 4 is constructed by drilling rods passing through the reserved pipe 5, the resulting high-pressure jet grouting pile can simultaneously support the original bridge enlarged foundation 8 and the newly widened foundation 9.

[0023] Among them, the diameter of the high-pressure jet grouting pile 4 is 1.0m~1.2m. The reserved pipes 5 on the same side of the concrete enlarged foundation 2 are arranged at equal intervals, and the diameter of the reserved pipes 5 is 10cm~12cm. After the construction of the pile foundation 4 is completed, the reserved pipes 5 need to be sealed with concrete. The concrete in the reserved pipes 5 is poured 7 days after the construction of the pile foundation 4 is completed. The reserved pipes 5 are filled with concrete of the same grade as the original bridge enlarged foundation 8 to seal them. The wall 3 is a masonry wall or a reinforced concrete wall.

Claims

1. A reinforcing structure of a bridge concrete enlarged foundation, comprising, from bottom to top, a gravel cushion layer (1), a concrete enlarged foundation (2) and a wall body (3) arranged in sequence, the gravel cushion layer is below a groundwater level line (7), the concrete enlarged foundation and the wall body are above the groundwater level line; characterized in that: The concrete enlarged foundation is composed of an original bridge enlarged foundation (8) and a new widened foundation (9) arranged outside the original bridge enlarged foundation, the new widened foundation is connected with the original bridge enlarged foundation through evenly distributed anchoring bars (6); a pile foundation (4) is arranged below the concrete enlarged foundation, penetrating through the gravel cushion and being inserted into the ground, the pile foundation realizes simultaneous support of the original bridge enlarged foundation and the new widened foundation.

2. The reinforced structure of a bridge concrete enlarged foundation according to claim 1, characterized in that: The pile foundation (4) is a high-pressure jet grouting pile, the diameter of the pile foundation is 1.0m-1.2m.

3. A reinforcement structure for an enlarged foundation of a bridge concrete according to claim 1 or 2, characterized in that: The vertical reserved pipes (5) for pile foundation (4) construction are arranged in the concrete enlarged foundation (2), one half of the reserved pipes is located in the original bridge enlarged foundation (8), and the other half is located in the new widened foundation (9).

4. The reinforcement structure of an enlarged foundation of a bridge concrete according to claim 1 or 2, characterized in that: The new widened foundation (9) is arranged on two sides of the original bridge enlarged foundation (8) in the width direction, the thickness and length of the new widened foundation are equal to those of the original bridge enlarged foundation.

5. The reinforcement structure of an enlarged foundation of a bridge concrete according to claim 1 or 2, characterized in that: The gravel cushion (1) is composed of an original bridge gravel cushion and a new widened gravel cushion arranged outside the original bridge.

6. The reinforced structure of an enlarged foundation of a bridge concrete according to claim 3, characterized in that: The same side reserved pipes (5) in the concrete enlarged foundation (2) are arranged at equal intervals, the diameter of the reserved pipes (5) is 10cm-12cm.

7. The reinforcement structure of an enlarged foundation of a bridge concrete according to claim 1 or 2, characterized by: The reserved pipes (5) are poured with the same number of concrete as the original bridge enlarged foundation (8) for sealing, the concrete in the reserved pipes is poured after the pile foundation (4) construction is completed for 7 days.

8. The reinforcement structure of an enlarged foundation of a bridge concrete according to claim 1 or 2, characterized in that: The wall body (3) is a stone wall body or a reinforced concrete wall body.

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