Reaming anchor cable structure for foundation pit supporting

Abstract

The utility model discloses a reaming anchor cable structure for supporting a foundation pit, which structurally comprises a loop bar, a bearing plate is arranged below the loop bar, an anchor cable steel strand is connected onto the bearing plate, a drainage pipe is arranged on the loop bar, a grouting channel is arranged on the drainage pipe, a limit block is arranged at the bottom of the loop bar, a spray head is connected with the bottom of the limit block, and the spray head is connected with the grouting channel. The grouting channel extends into the spray head from the drainage pipe, the spray head is in a circular truncated cone shape, the drill bit is connected to the lower portion of the spray head, the drill bit is of a solid structure and is in a conical shape, and the flow guide channel is arranged in the grouting channel and is in a spiral shape, so that during rotary jetting, the jetting force can be increased, and blockage is prevented; and a limiting block is arranged on the spray head and used for preventing the spray head from being pasted with soil.

Description

Technical Field ,

[0004] ,

[0010]

[0001] The utility model relates to a hole - expanding anchor cable structure for foundation pit support, belonging to the technical field of foundation pits. Background Technique

[0002] A foundation pit is an earth pit excavated according to the base elevation and the foundation plan dimensions at the foundation design position. Before excavation, the excavation plan should be determined based on geological and hydrographic data, combined with the situation of nearby buildings on - site, and waterproof and drainage work should be done well. For those with shallow excavation, the method of sloping the side slope can be used to make the soil slope stable, and the slope size is determined according to relevant construction regulations.

[0003] When the foundation pit is excavated deeper and there are adjacent buildings, the method of supporting the foundation pit wall can be used, and the hole - expanding anchor cable is one of the common methods for supporting the foundation pit wall. When the existing hole - expanding anchor cable is in use, usually the mud is sprayed in a rotary jetting manner. Since the mud is viscous, it is easy to be blocked during the spraying process due to insufficient rotational force or soil blockage. Therefore, in view of the above situation, a hole - expanding anchor cable structure for foundation pit support is proposed. Content of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a hole - expanding anchor cable structure for foundation pit support to solve the existing problems.

[0005] In order to achieve the above purpose, the utility model is realized through the following technical scheme: A hole - expanding anchor cable structure for foundation pit support, its structure includes a sleeve rod, a bearing plate is arranged below the sleeve rod, an anchor cable steel strand is connected to the bearing plate, and a drainage pipe is arranged on the sleeve rod. A grouting channel is opened on the drainage pipe. A limiting block is arranged at the bottom of the sleeve rod, a nozzle is connected to the bottom of the limiting block, the grouting channel extends from the drainage pipe to the inside of the nozzle. The nozzle is in a frustum shape and a drill bit is connected below the nozzle. The drill bit is of a solid structure and is conical.

[0006] Furthermore, a diversion channel is arranged in the grouting channel, and the diversion channel is spiral.

[0007] Furthermore, spray holes are opened on the nozzle, and the spray holes are distributed on the nozzle.

[0008] Furthermore, the drill bit is composed of an upper drill bit and a lower drill bit, and the upper drill bit and the lower drill bit are integrally formed.

[0009] Furthermore, slots are opened on the upper drill bit, the slots are equidistantly opened on the upper drill bit in a shape of "丿", and a scraping knife is fixedly connected in the slots, and the scraping knife is also in a shape of "丿".

[0010] Furthermore, the directions of the diversion channel, the slots, and the scraping knife are all matched with the direction of rotation.

[0011] The beneficial effects of this utility model are:

[0012] By providing a flow guide channel within the grouting channel, which is spiral-shaped, the force of the jet can be increased during rotational spraying, preventing blockage.

[0013] A limiting block is installed on the nozzle to prevent mud from sticking to it.

[0014] The presence of a scraper allows the inner wall of the pit to be leveled during rotation, thus enabling better spraying operations. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of an enlarged-hole anchor cable structure for foundation pit support according to this utility model;

[0017] Figure 2 This is a schematic diagram of the grouting channel structure of an enlarged-hole anchor cable structure for foundation pit support according to this utility model;

[0018] Figure 3 This is a schematic diagram of the upper drill bit structure of a hole-enlarging anchor cable structure for foundation pit support according to this utility model;

[0019] Figure 4 This is a schematic diagram of the scraper structure of a hole-expanding anchor cable structure for foundation pit support according to this utility model.

[0020] In the diagram: 1. Sleeve rod; 2. Load-bearing plate; 3. Anchor cable strand; 4. Drainage pipe; 5. Grouting channel; 6. Limiting block; 7. Nozzle; 8. Drill bit; 501. Guide channel; 701. Spray hole; 801. Upper drill bit; 802. Lower drill bit; 803. Grooving; 804. Scraper. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1-4, the present utility model provides a technical solution for an expanded-hole anchor cable structure for foundation pit support: its structure includes a sleeve rod 1, a bearing plate 2 is provided below the sleeve rod 1, an anchor cable steel strand 3 is connected to the bearing plate 2, and a drainage pipe 4 is provided on the sleeve rod 1. A grouting channel 5 is opened on the drainage pipe 4. A limiting block 6 is provided at the bottom of the sleeve rod 1, and a nozzle 7 is connected to the bottom of the limiting block 6. The grouting channel 5 extends from the drainage pipe 4 into the nozzle 7. The nozzle 7 is in a frustum shape and a drill bit 8 is connected below the nozzle 7. The drill bit 8 is a solid structure and is conical;

[0023] A diversion channel 501 is provided in the grouting channel 5, and the diversion channel 501 is spiral;

[0024] Spray holes 701 are opened on the nozzle 7, and the spray holes 701 are distributed on the nozzle 7;

[0025] The drill bit 8 is composed of an upper drill bit 801 and a lower drill bit 802. The upper drill bit 801 and the lower drill bit 802 are integrally formed. Slots 803 are opened on the upper drill bit 801. The slots 803 are equidistantly opened on the upper drill bit 801 in a "丿" shape. Scrapers 804 are fixedly connected in the slots 803, and the scrapers 804 are also in a "丿" shape.

[0026] For example, during operation, after grouting through the grouting channel 5, the sleeve rod 1 is inserted into a previously dug foundation pit, and then spraying is achieved by rotation;

[0027] During rotation, the scraper 804 will scrape the inner wall of the bottom of the foundation pit flat to assist in the spraying effect. And while rotating, the slurry in the grouting channel 5 will flow along the diversion channel 501. When the slurry reaches the nozzle 7, the slurry will obtain a greater rotational force, so as to better spray out from the spray holes 701.

[0028] The above shows and describes the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A borehole-expanding anchor cable structure for foundation pit support, comprising a sleeve rod (1), a load-bearing plate (2) below the sleeve rod (1), an anchor cable strand (3) connected to the load-bearing plate (2), and a drainage pipe (4) on the sleeve rod (1), wherein a grouting channel (5) is provided on the drainage pipe (4), characterized in that: A limiting block (6) is provided at the bottom of the sleeve rod (1). A spray head (7) is connected to the bottom of the limiting block (6). The grouting channel (5) extends from the drainage pipe (4) to the inside of the spray head (7). The spray head (7) is frustum-shaped and a drill bit (8) is connected below the spray head (7). The drill bit (8) is of solid structure and is conical.

2. The hole supporting structure according to claim 1, wherein: A diversion channel (501) is provided in the grouting channel (5). The diversion channel (501) is spiral.

3. The hole supporting structure according to claim 1, wherein: Spray holes (701) are formed in the spray head (7). The spray holes (701) are distributed on the spray head (7).

4. The hole expansion anchor structure for foundation pit support according to claim 1, characterized in that: The drill bit (8) is composed of an upper drill bit (801) and a lower drill bit (802). The upper drill bit (801) and the lower drill bit (802) are integrally formed.

5. The underpinning structure according to claim 4, wherein: Grooves (803) are formed in the upper drill bit (801). The grooves (803) are equidistantly formed in the shape of a "丿" on the upper drill bit (801). Scrapers (804) are fixedly connected in the grooves (803). The scrapers (804) are also in the shape of a "丿".

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