Bridge head vehicle bumping prevention structure and construction method thereof

Abstract

The invention discloses a bridgehead vehicle bumping prevention structure and relates to the technical field of roads and bridges, the bridgehead vehicle bumping prevention structure comprises a pavement layer, a reinforcing layer and reinforcing piles which are sequentially arranged from top to bottom, the pavement layer is used for being flush with a bridge floor, the strength of the reinforcing layer is not smaller than that of a bridgehead foundation, and the reinforcing piles are used for being inserted into the bridgehead foundation. According to the bridgehead vehicle bumping prevention structure and the construction method thereof, the problem of bridgehead vehicle bumping can be effectively solved. The invention further provides a construction method of the bridgehead vehicle bumping prevention structure.

Description

Technical Field

[0001] The invention relates to the technical field of roads and bridges, and in particular to a bridge head anti-jumping structure and a construction method thereof. Background Art

[0002] The stubborn problem of vehicle jumping at the bridge head is an important issue related to the quality of road engineering and driving safety. The vehicle jumping at the bridge head usually occurs at the connection between the bridge and the approach road embankment. Due to various reasons, there is a height difference between the bridge and the road, and the vehicle will have obvious bumps and jumps when passing, which seriously affects the driving comfort and safety.

[0003] The cause of the vehicle jumping at the bridge head is usually derived from the settlement of the bridge head foundation, and the cause of the foundation settlement is the instability of the foundation and the loose backfill; the existing solutions are usually backfilling with original soil, treating the foundation with ash soil, and overlapping the bridge head. The original soil backfill foundation soil is soft and will become silt under the action of surface water and groundwater, which will reduce the strength of the foundation soil and continue to cause settlement; treating the foundation with ash soil can make the soft soil hard, but the construction is difficult and often cannot be done properly, and the settlement problem cannot be solved fundamentally; overlapping the bridge head is achieved by making a slab at the bridge head, but with the overall settlement of the bridge head foundation, there will be air gaps under the slab; therefore, the current methods are usually difficult to effectively solve the problem of vehicle jumping at the bridge head. Summary of the invention

[0004] The purpose of the present invention is to provide a bridge head anti-vehicle jumping structure and a construction method thereof, so as to solve the problems existing in the above-mentioned prior art and effectively solve the problem of bridge head vehicle jumping.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a bridge head anti-jumping structure, comprising a pavement layer, a reinforcement layer and reinforcement piles arranged in sequence from top to bottom, the pavement layer is used to be flush with the bridge deck, the strength of the reinforcement layer is not less than the strength of the bridge head foundation, and the reinforcement piles are used to be inserted into the bridge head foundation.

[0007] Preferably, the reinforcement layer includes a first reinforcement layer and a second reinforcement layer arranged from top to bottom, the strength of the first reinforcement layer is greater than the strength of the second reinforcement layer, and the strength of the second reinforcement layer is not less than the strength of the bridgehead foundation.

[0008] Preferably, the strength of the first reinforcement layer is 4-5 MPa, and the strength of the second reinforcement layer is 2-3 MPa.

[0009] Preferably, the reinforcement layer is configured as fluidized soil.

[0010] Preferably, the reinforcement piles are provided in plurality.

[0011] Preferably, the reinforcement piles are configured as cement jet-jet piles.

[0012] The present invention also provides a construction method for the bridge head anti-jumping structure; the method comprises the following steps: arranging reinforcement piles in the bridge head foundation; arranging a reinforcement layer on the reinforcement piles; and arranging a road surface layer on the reinforcement layer.

[0013] Preferably, before setting the reinforcement piles in the bridgehead foundation, the silt in the bridgehead foundation is firstly cleaned.

[0014] Preferably, the reinforcement layer is set to fluidized soil; before the step of setting the reinforcement layer on the reinforcement piles, the fluidized soil is first prepared, and then the fluidized soil is backfilled and solidified to form the reinforcement layer.

[0015] Preferably, the reinforcement layer includes a first reinforcement layer and a second reinforcement layer arranged from top to bottom; the strength of the first reinforcement layer is 4-5MPa, and the strength of the second reinforcement layer is 2-3MPa; the backfilling of fluidized soil is constructed in two steps, first backfilling the lower layer with 2-3MPa fluidized soil to form the second reinforcement layer, and then backfilling the upper layer with 4-5MPa fluidized soil to form the first reinforcement layer.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The bridge head anti-jumping structure and construction method provided by the present invention can improve the strength of the bridge head foundation by arranging reinforcement piles on the bridge head foundation, and arranging a reinforcement layer with strength not less than that of the bridge head foundation on the upper layer of the reinforcement piles, so as to improve the overall strength and reduce the probability of settlement, and then arrange a road surface layer flush with the bridge deck on the top layer to meet the vehicle driving requirements and effectively solve the problem of vehicle jumping on the bridge head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the bridge head anti-jumping structure provided in Example 1.

[0020] In the figure: 1-pavement layer; 2-reinforcement layer; 21-first reinforcement layer; 22-second reinforcement layer; 3-reinforcement piles. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a bridge head anti-vehicle jumping structure and a construction method thereof, so as to solve the problems existing in the above-mentioned prior art and effectively solve the problem of bridge head vehicle jumping.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Embodiment 1

[0025] This embodiment provides a bridge head anti-jump structure, see Figure 1 , including a pavement layer 1, a reinforcement layer 2 and reinforcement piles 3 arranged in sequence from top to bottom, the pavement layer 1 is used to be flush with the bridge deck, the strength of the reinforcement layer 2 is not less than the strength of the bridge head foundation, and the reinforcement piles 3 are used to be inserted into the bridge head foundation.

[0026] By setting reinforcing piles 3 on the bridge head foundation, the strength of the bridge head foundation can be improved, and a reinforcing layer 2 with a strength not lower than that of the bridge head foundation is set on the upper layer 3 of the reinforcing piles to improve the overall strength and reduce the probability of settlement. Then, a pavement layer 1 flush with the bridge deck is set on the top layer to meet the vehicle driving needs and effectively solve the problem of vehicle jumping at the bridge head.

[0027] In the optional scheme of this embodiment, it is more preferred that the reinforcement layer 2 includes a first reinforcement layer 21 and a second reinforcement layer 22 arranged from top to bottom, and the strength of the first reinforcement layer 21 is greater than the strength of the second reinforcement layer 22, thereby ensuring the strength of the upper layer and meeting driving requirements; the strength of the second reinforcement layer 22 is not less than the strength of the bridgehead foundation, thereby improving the overall strength.

[0028] In the optional scheme of this embodiment, more preferably, the strength of the first reinforcement layer 21 is 4-5 MPa, and the strength of the second reinforcement layer 22 is 2-3 MPa; the specific strengths can be determined according to the actual scenario.

[0029] In the optional scheme of this embodiment, it is more preferred that the reinforcement layer 2 is set as fluidized soil. The fluidized soil is a material with good fluidity and plasticity by adding solidifying materials such as cement to the mud. Its compressive strength can reach 1-5MPa. It can generate strength by itself through hydration reaction. It has the characteristics of high fluidity and self-compacting. It can automatically flow and fill in a small space without human intervention, which greatly improves the construction efficiency; and after foundation treatment and fluidized soil solidification, the abutment foundation can form a whole, which improves the overall stability and bearing capacity of the structure; and the fluidized soil backfill construction has the advantage of one-time forming, which can greatly improve the construction efficiency and quality. Compared with the traditional backfill method that requires multiple compaction and trimming, the fluidized soil backfill construction is simpler and faster; the strength of the solidified fluidized soil can reach 2-5MPa, which can transform the original soft soil foundation into a hard soil foundation, thereby improving the bearing capacity and stability of the foundation, and can effectively reduce the subsequent settlement, and the settlement is stable.

[0030] In the optional solutions of this embodiment, it is more preferred that a plurality of reinforcing piles 3 are provided to ensure overall stability.

[0031] In the optional scheme of this embodiment, it is more preferred that the reinforcement piles 3 are configured as cement rotary jet piles.

[0032] Embodiment 2

[0033] This embodiment provides a construction method of the bridge head anti-jumping structure in Embodiment 1, comprising the following steps:

[0034] Reinforcement piles 3 are set in the bridgehead foundation. Before setting the reinforcement piles 3 in the bridgehead foundation, the silt in the bridgehead foundation is first cleaned to prevent the silt from affecting the overall stability.

[0035] A reinforcement layer 2 is set on the reinforcement pile 3; according to conventional construction requirements, a template and a support system are built, and then the reinforcement pile 3 is constructed and the fluidized soil is backfilled. After the fluidized soil is backfilled and solidified, the template and the support system can be removed; the fluidized soil backfill is constructed in two steps, first backfilling the lower layer with 2-3MPa fluidized soil to form a second reinforcement layer 22, and then backfilling the upper layer with 4-5MPa fluidized soil to form a first reinforcement layer 21. The fluidized soil generates strength through hydration reaction, has high fluidity and self-compacting characteristics, can automatically flow and fill in a small space without manual intervention, and greatly improves the quality of the material. The construction efficiency is improved; after foundation treatment and fluidized soil solidification, the abutment foundation can form a whole, which improves the overall stability and bearing capacity of the structure; and the fluidized soil backfill construction has the advantage of one-time forming, which can greatly improve the construction efficiency and quality. Compared with the traditional backfill method that requires multiple compaction and trimming, the fluidized soil backfill construction is simpler and faster; the strength of the solidified fluidized soil can reach 2-5MPa, which can transform the original soft soil foundation into a hard soil foundation, thereby improving the bearing capacity and stability of the foundation, and can effectively reduce the subsequent settlement, and the settlement is stable.

[0036] A road surface layer 1 is provided on the reinforcement layer 2 to meet the driving requirements of vehicles.

[0037] Among them, the production process of fluidized soil is as follows: the slag is first separated by a separator, the mud is made into slurry, the solid particles are crushed to make machine-made sand, the machine-made sand and slurry are mixed and a curing agent is added and stirred to make fluidized soil.

[0038] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A bridge head anti-jumping structure, characterized in that: It comprises a pavement layer (1), a reinforcement layer (2) and reinforcement piles (3) arranged in sequence from top to bottom, the pavement layer (1) is used to be flush with the bridge deck, the strength of the reinforcement layer (2) is not less than the strength of the bridgehead foundation, and the reinforcement piles (3) are used to be inserted into the bridgehead foundation.

2. The anti-jump structure at the bridge head according to claim 1 is characterized in that: The reinforcement layer (2) comprises a first reinforcement layer (21) and a second reinforcement layer (22) arranged from top to bottom, the strength of the first reinforcement layer (21) is greater than the strength of the second reinforcement layer (22), and the strength of the second reinforcement layer (22) is not less than the strength of the bridgehead foundation.

3. The anti-jump structure at the bridge head according to claim 2 is characterized in that: The strength of the first reinforcement layer (21) is 4-5 MPa, and the strength of the second reinforcement layer (22) is 2-3 MPa.

4. The anti-jump structure at the bridge head according to claim 2 is characterized in that: The reinforcement layer (2) is configured as fluidized soil.

5. The anti-jump structure at the bridge head according to claim 1 is characterized in that: The reinforcement piles (3) are arranged in plurality.

6. The anti-jump structure at the bridge head according to claim 5 is characterized in that: The reinforcement piles (3) are configured as cement jet-jet piles.

7. A construction method for the bridge head anti-jumping structure according to any one of claims 1 to 6, characterized in that: The steps include: Arranging reinforcement piles (3) in the bridge head foundation; Arranging a reinforcement layer (2) on the reinforcement pile (3); A pavement layer (1) is arranged on the reinforcement layer (2).

8. The construction method according to claim 7, characterized in that: Before the reinforcing piles (3) are arranged in the bridgehead foundation, the silt in the bridgehead foundation is firstly cleaned.

9. The construction method according to claim 7, characterized in that: The reinforcement layer (2) is configured as fluidized soil; Before the reinforcement layer (2) is arranged on the reinforcement pile (3), fluidized soil is first prepared, and then the fluidized soil is backfilled and solidified to form the reinforcement layer (2).

10. The construction method according to claim 9, characterized in that: The reinforcing layer (2) comprises a first reinforcing layer (21) and a second reinforcing layer (22) arranged from top to bottom; the strength of the first reinforcing layer (21) is 4-5 MPa, and the strength of the second reinforcing layer (22) is 2-3 MPa; The backfilling of fluidized soil is carried out in two steps: first, the lower layer is backfilled with fluidized soil of 2-3 MPa to form the second reinforcement layer (22); and then the upper layer is backfilled with fluidized soil of 4-5 MPa to form the first reinforcement layer (21).

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