A dry hole-forming cast-in-place pile matched with a post-grouting rotary drilling rig

Abstract

The utility model discloses a kind of dry hole-forming cast-in-place pile of post-grouting matched rotary drilling rig, it is related to rotary drilling mechanical hole-forming cast-in-place pile technical field.The utility model includes hole pile body, hole pile body includes the reinforcement cage of being lowered to rotary drilling hole and the concrete of being cast in rotary drilling hole, reinforcement cage includes reinforcement reinforcing ring, reinforcement body and grouting pipe body, multiple reinforcement bodies are fixedly connected by reinforcement reinforcing ring, reinforcement reinforcing ring is equidistantly provided with several along the axial direction of reinforcement body, grouting pipe body penetrates reinforcement reinforcing ring.The utility model is positioned fixed by the reinforcement reinforcing ring being set, can be positioned and fixed to multiple reinforcement bodies, so that reinforcement body in reinforcement cage can be evenly distributed quickly and accurately, so as to improve the quality and grouting efficiency of cast-in-place pile, the positioning projection and positioning groove being set, the positioning splicing of two reinforcement cages can be realized, so as to be applicable to rotary drilling hole of different depth.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotary drilling machine-drilled cast-in-place piles, and in particular relates to a dry-method-drilled cast-in-place pile with a rotary drilling rig that is equipped with post-grouting. Background Technology

[0002] Conventional rotary drilling rigs for bored piles offer advantages such as fast construction speed and flexible operation, making them increasingly popular among construction companies. Currently, there are two methods for rotary drilling: the first is mud-wall drilling, where the mud primarily serves to protect the pile wall and suspend sludge, enabling secondary cleaning before concrete pouring; the second method is dry drilling under favorable geological conditions and stable soil layers. A search revealed patent CN205116159U, which discloses a dry-method bored pile using a rotary drilling rig with post-grouting technology. This includes a pile body embedded in the ground, composed of concrete and a reinforcing cage 3 within the concrete. The reinforcing cage includes uniformly distributed cylindrical main reinforcement bars, with stirrups and reinforcing hoops on the outer and inner sides of the main reinforcement bars. Several grouting pipes are evenly arranged along the circumference of the reinforcing cage. The lower part of the pile body, located below the rock strata, is a sidewall grouting section, with a sediment consolidation section at the bottom of the sidewall grouting section.

[0003] However, in actual use, the applicant found that when fixing the main reinforcement with stirrups and reinforcing hoops, the lack of a positioning structure made it difficult for personnel to accurately and evenly distribute the main reinforcement when positioning multiple main reinforcements. Moreover, the operation was time-consuming and laborious, which reduced the quality and grouting efficiency of the cast-in-place pile. In view of this, we propose a dry-method bored cast-in-place pile with post-grouting and rotary drilling rig. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a dry-method bored pile with a rotary drilling rig for post-grouting, comprising a pile body, wherein the pile body includes a reinforcing cage lowered into the rotary drilling hole and concrete poured into the rotary drilling hole, the reinforcing cage including a reinforcing ring, a reinforcing body and a grouting pipe, multiple reinforcing bodies being fixedly connected by the reinforcing ring, and several reinforcing rings being equally spaced along the axial direction of the reinforcing body, the grouting pipe penetrating the reinforcing ring.

[0006] Preferably, the top of the reinforcing bar ring is fixedly provided with a positioning protrusion, and the positioning protrusions on the top of the reinforcing bar ring are arranged in a ring array.

[0007] Preferably, the bottom of the reinforcing bar ring is provided with a positioning groove, and the positioning grooves at the bottom of the reinforcing bar ring are arranged in a circular array, and the positioning protrusion is connected to the positioning groove.

[0008] Preferably, the outer wall of the positioning protrusion is flush with the peripheral wall of the reinforcing ring.

[0009] Preferably, the reinforcing bar ring has a ring array of through holes for passing through the reinforcing bar body.

[0010] Preferably, the reinforcing steel ring has grouting pipe perforations arranged in a ring array for passing through the grouting pipe body.

[0011] This utility model has the following beneficial effects:

[0012] This utility model relates to a dry-method bored pile with a rotary drilling rig that is equipped with a post-grouting system. By setting up a steel reinforcement ring, multiple steel bars can be positioned and fixed, enabling the steel bars in the steel cage to be quickly and accurately distributed evenly, thereby improving the quality and grouting efficiency of the bored pile. By setting up positioning protrusions and positioning grooves, two steel cages can be positioned and spliced, making it suitable for rotary drilling at different depths. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a dry-method bored pile with a rotary drilling rig equipped with post-grouting according to the present invention;

[0015] Figure 2 This is a schematic diagram of the steel reinforcement cage in a dry-drilled cast-in-place pile with a rotary drilling rig that is equipped with post-grouting;

[0016] Figure 3 This is a top view schematic diagram of the steel reinforcement ring in a dry-drilled cast-in-place pile with a rotary drilling rig that is equipped with post-grouting;

[0017] Figure 4 This is a bottom view schematic diagram of the steel reinforcement ring in a dry-drilled cast-in-place pile with a rotary drilling rig that is equipped with post-grouting.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Pit body; 2. Reinforcing cage; 21. Reinforcing ring; 211. Reinforcing bar perforation; 212. Grouting pipe perforation; 213. Positioning protrusion; 214. Positioning groove; 22. Reinforcing bar body; 23. Grouting pipe body; 3. Concrete. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 As shown, this utility model provides a technical solution:

[0022] A dry-method bored pile with a rotary drilling rig and post-grouting is disclosed, comprising a pile body 1, which includes a reinforcing cage 2 lowered into the rotary drilling hole and concrete 3 poured into the hole. The reinforcing cage 2 includes a reinforcing ring 21, reinforcing steel bodies 22, and a grouting pipe 23. Multiple reinforcing steel bodies 22 are fixedly connected by the reinforcing ring 21. The reinforcing ring 21 has a ring array of reinforcing steel through holes 211 for passing through the reinforcing steel bodies 22. The reinforcing ring 21 is provided with several reinforcing steel through holes 212 at equal intervals along the axial direction of the reinforcing steel bodies 22. The grouting pipe 23 passes through the reinforcing ring 21, and the reinforcing ring 21 has a ring array of grouting pipe through holes 212 for passing through the grouting pipe 23. The reinforcing ring 21 can position and fix multiple reinforcing steel bodies 22, enabling the reinforcing steel bodies 22 in the reinforcing cage 2 to be quickly and accurately evenly distributed, thereby improving the quality and grouting efficiency of the bored pile.

[0023] The top of the reinforcing steel ring 21 is fixedly provided with a positioning protrusion 213, and several positioning protrusions 213 on the top of the reinforcing steel ring 21 are arranged in a circular array. The bottom of the reinforcing steel ring 21 is provided with a positioning groove 214, and several positioning grooves 214 on the bottom of the reinforcing steel ring 21 are arranged in a circular array. The positioning protrusion 213 and the positioning groove 214 are connected in cooperation. The outer wall of the positioning protrusion 213 is flush with the peripheral wall of the reinforcing steel ring 21. Through the positioning protrusion 213 and the positioning groove 214, the positioning and splicing of two reinforcing steel cages 2 can be realized, so that it can be applied to rotary drilling at different depths.

[0024] Working principle: First, a rotary drilling rig drills a rotary hole in the ground. Then, three reinforcing steel rings 21 are arranged at equal intervals along the coaxial direction. The reinforcing steel bodies 22 are then passed through the corresponding steel through holes 211 in each of the three reinforcing steel rings 21, connecting the three reinforcing steel rings 21 in series. In this way, the reinforcing steel bodies 22 are inserted into all the steel through holes 211, ensuring that both ends of the reinforcing steel bodies 22 are flush with the outer end faces of the reinforcing steel rings 21 on both sides. Next, all the joints between the reinforcing steel bodies 22 and the reinforcing steel rings 21 are welded together. Then, according to the depth of the rotary drilling hole, multiple welded cylindrical structures are spliced ​​end to end. During splicing, positioning protrusions 213 are inserted into positioning grooves 214 to achieve rapid connection between adjacent reinforcing steel rings 21. During this process, the grouting pipe through holes 212 on adjacent reinforcing steel rings 21 should be aligned. Finally, the joints between two tightly fitting reinforcing steel rings 21 on adjacent reinforcing steel cages 2 are welded together. To make it a cylinder of the required height, one end of the grouting pipe 23 can be passed through the corresponding grouting pipe perforation 212 in sequence, with both ends of the grouting pipe 23 extending out of both ends of the large reinforcing cage 2 by a distance of 300mm. If the length of the grouting pipe 23 is insufficient, multiple grouting pipes 23 can be welded end to end. After placing the grouting pipe 23 in the appropriate position, the connection between the grouting pipe 23 and the reinforcing ring 21 can be welded. After fixing the grouting pipe body 23, the mud hole at the bottom of the grouting pipe body 23 is sealed with thumbtacks, and waterproof tape is wrapped around the outer wall of the grouting pipe body 23 to obtain the steel cage 2 of the required height. Finally, the completed steel cage 2 can be lifted and lowered into the rotary drilling hole using a lifting device, so that the upper end of the grouting pipe body 23 protrudes from the ground to facilitate subsequent mud injection. Then, concrete 3 is poured into the rotary drilling hole, and mud is injected into the interior of the grouting pipe body 23 from the upper end to fill it.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.

Claims

1. A dry-method bored pile with a rotary drilling rig for post-grouting, comprising a pile body (1), characterized in that: The pile body (1) includes a steel cage (2) lowered into the rotary drilling hole and concrete (3) poured into the rotary drilling hole. The steel cage (2) includes a steel reinforcement ring (21), a steel body (22) and a grouting pipe (23). Multiple steel bodies (22) are fixedly connected by steel reinforcement rings (21). Several steel reinforcement rings (21) are arranged at equal intervals along the axial direction of the steel body (22). The grouting pipe (23) penetrates the steel reinforcement rings (21).

2. The dry-method bored pile with post-grouting rotary drilling rig according to claim 1, characterized in that, The top of the steel reinforcement ring (21) is fixedly provided with a positioning protrusion (213), and the positioning protrusion (213) on the top of the steel reinforcement ring (21) is arranged in a ring array of several.

3. The dry-method bored pile with post-grouting rotary drilling rig according to claim 2, characterized in that, The bottom of the reinforcing bar ring (21) is provided with a positioning groove (214), and the positioning groove (214) at the bottom of the reinforcing bar ring (21) is provided in a ring array. The positioning protrusion (213) is connected to the positioning groove (214).

4. The dry-method bored pile with post-grouting rotary drilling rig according to claim 3, characterized in that, The outer wall of the positioning protrusion (213) is flush with the peripheral wall of the reinforcing ring (21).

5. The dry-method bored pile with post-grouting rotary drilling rig as described in claim 1, characterized in that, The reinforcing steel ring (21) has a ring array of steel through holes (211) for passing through the steel body (22).

6. The dry-method bored pile with post-grouting rotary drilling rig according to claim 1, characterized in that, The reinforcing steel ring (21) has grouting pipe perforations (212) arranged in a ring array for passing through the grouting pipe body (23).

Images