A bored pile bedrock treatment structure

Abstract

The utility model discloses a hole digging pile bedrock treatment structure belongs to the existing operation railway roadbed protection construction processing technical field, including the hole digging pile bedrock place downward drilling formed several drill holes, every the drill hole is inserted with reinforcing member, reinforcing member and hole digging pile protection wall between be provided with the reinforcement cage, reinforcing member and reinforcement cage link to form the whole. The spiral rib is implanted in the hole digging pile bottom bedrock, forms the circular ring framework, and the main rib and the stirrup of the reinforcement cage are connected, and the reinforcing stirrup is connected in the spiral inside, and the whole is formed under the pouring of the concrete, and the bending moment caused by the live load and dead load is resisted under the common force. Effectively solve the problem that artificial bedrock cannot be excavated, hole digging pile cannot be deeply into bedrock, leading to the problem that the existing line roadbed cannot be effectively protected.

Description

Technical Field

[0001] This utility model relates to a bedrock treatment structure, specifically a bored pile bedrock treatment structure, belonging to the technical field of existing operational railway subgrade protection construction and treatment. Background Technology

[0002] With the increasing number of railway second-line construction projects in recent years, the number of extended bridges and culverts for these lines has also increased, leading to more complex geological conditions. Previous designs, when the protection height was high, used bored piles to protect the existing roadbed. In these cases, the geology was mostly soil, making manual excavation relatively easy, construction less difficult, and pile formation convenient, effectively protecting the existing roadbed. However, in cases of strongly weathered or weakly weathered bedrock with high bearing capacity, manual excavation is impossible, preventing the bored piles from penetrating deep into the bedrock to form an effective protection system. Therefore, further improvements are needed. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a bored pile foundation rock treatment structure. The structure is simple and reasonable, effectively strengthens the existing roadbed, and forms an effective protection system.

[0004] The technical solution adopted by this utility model is as follows: a foundation rock treatment structure for bored piles, comprising a plurality of boreholes formed by drilling downwards from the foundation rock of the bored pile; a reinforcing component is inserted into each of the boreholes; a steel cage is provided between the reinforcing component and the protective wall of the bored pile; the reinforcing component and the steel cage are connected to form an integral whole.

[0005] Furthermore, the reinforcing component is a threaded steel bar; the drilling depth is 1 / 3 of the height of the bored pile retaining wall.

[0006] Furthermore, the diameter of the drilled hole is larger than the outer diameter of the reinforcing member.

[0007] Furthermore, the space between the drilled hole and the threaded steel bar is filled with micro-expansion concrete.

[0008] Furthermore, the steel cage has main bars and stirrups; the threaded steel bars are welded to the main bars and stirrups respectively.

[0009] Furthermore, the spacing between the threaded steel bars is 1 / 2 the spacing between the main bars.

[0010] Furthermore, reinforcing stirrups are also provided on the inner side of the threaded steel bar.

[0011] Furthermore, the longitudinal spacing between the reinforcing stirrups is 40cm; the longitudinal spacing between the stirrups is 20cm.

[0012] This utility model has the following beneficial effects: It embeds threaded steel bars into the bedrock at the bottom of the bored pile, forming a circular skeleton that connects with the main reinforcement and stirrups of the steel cage. Reinforcing stirrups are also connected to the inner side of the threads, forming a unified whole under concrete pouring, jointly resisting bending moments caused by live and dead loads. This effectively solves the problem that manual excavation of bedrock is impossible, and bored piles cannot penetrate deeply into the bedrock, thus failing to effectively protect existing roadbeds. Attached Figure Description

[0013] Figure 1 This is a diagram showing the internal structure of the bored pile body in this utility model.

[0014] Figure 2 This is a schematic diagram of the pile's cross-section.

[0015] Figure 3 This is a schematic diagram of the pile cross-section (excluding the retaining wall of the bored pile).

[0016] Wherein: 1 is the bedrock of the bored pile, 2 is the reinforcing component, 3 is the protective wall of the bored pile, 4 is the steel cage, 4-1 is the main reinforcement, 4-2 is the stirrup, 5 is the reinforcing stirrup, and 6 is the drilled section. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] See Figures 1-3 This application discloses a foundation rock treatment structure for bored piles, including a plurality of boreholes formed by drilling downwards from the foundation rock 1 of the bored pile; a reinforcing member 2 is inserted into each of the boreholes; a steel cage 4 is provided between the reinforcing member 2 and the protective wall 3 of the bored pile; the reinforcing member 2 and the steel cage 4 are connected to form an integral whole.

[0019] Furthermore, the reinforcing component 2 is a threaded steel bar; the depth of the borehole is 1 / 3 of the height of the bored pile retaining wall 3.

[0020] Furthermore, the diameter of the drilled hole is larger than the outer diameter of the reinforcing member 2.

[0021] Furthermore, the space between the drilled hole and the threaded steel bar is filled with micro-expansion concrete.

[0022] Furthermore, the steel cage 4 has main bars 4-1 and stirrups 4-2; the threaded steel bars are welded to the main bars 4-1 and stirrups 4-2 respectively.

[0023] Furthermore, the spacing between the threaded steel bars is 1 / 2 the spacing between the main reinforcement bars 4-1.

[0024] Furthermore, the inner side of the threaded steel bar is also provided with reinforcing stirrups 5.

[0025] Furthermore, the longitudinal spacing between the reinforcing stirrups 5 is 40cm; the longitudinal spacing between the stirrups 4-2 is 20cm.

[0026] Working principle: such as Figure 1 As shown, the diameter of the reinforcing component is 32mm threaded steel bar. A drilling machine is used to drill holes in the bedrock inside the bored pile from top to bottom. The drilling depth is one-third of the height of the bored pile retaining wall 3. The drilling spacing is half the spacing of the main reinforcement 4-1 in the reinforcing cage 4. After positioning, the holes are drilled one by one. The hole diameter is slightly larger than the threaded steel bar. After each hole is formed, micro-expansion concrete is injected into the hole. Then the threaded steel bar is inserted into the hole to form a whole with the bedrock.

[0027] Subsequently, a steel cage is placed inside the bored pile, and the threaded steel bars are welded to the main reinforcement 4-1 and stirrups 4-2 of the steel cage inside the bored pile to form an integral whole with the steel cage. Then, concrete is poured inside the bored pile to form an integral whole to achieve the purpose of protecting the roadbed.

[0028] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A foundation rock treatment structure for bored piles, characterized in that: It includes several boreholes formed by drilling downwards from the bedrock (1) of the self-excavated pile; a reinforcing member (2) is inserted into each of the boreholes; a steel cage (4) is provided between the reinforcing member (2) and the protective wall (3) of the self-excavated pile; the reinforcing member (2) and the steel cage (4) are connected to form a whole.

2. The foundation rock treatment structure for bored piles according to claim 1, characterized in that: The reinforcing component (2) is a threaded steel bar; the depth of the borehole is 1 / 3 of the height of the bored pile protective wall (3).

3. The foundation rock treatment structure for bored piles according to claim 2, characterized in that: The diameter of the drilled hole is larger than the outer diameter of the reinforcing member (2).

4. The foundation rock treatment structure for bored piles according to claim 3, characterized in that: The space between the drilled hole and the threaded steel bar is filled with micro-expansion concrete.

5. The foundation rock treatment structure for bored piles according to claim 4, characterized in that: The steel cage (4) has main bars (4-1) and stirrups (4-2); the threaded steel bars are welded to the main bars (4-1) and stirrups (4-2) respectively.

6. The foundation rock treatment structure for bored piles according to claim 5, characterized in that: The spacing between the threaded steel bars is 1 / 2 the spacing between the main bars (4-1).

7. The foundation rock treatment structure for bored piles according to claim 6, characterized in that: The inner side of the threaded steel bar is also provided with reinforcing stirrups (5).

8. The foundation rock treatment structure for bored piles according to claim 7, characterized in that: The longitudinal spacing between the reinforcing stirrups (5) is 40cm; the longitudinal spacing between the stirrups (4-2) is 20cm.

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