Single-pile reducing rock-socketed secant pile

Abstract

The utility model relates to the field of secant piles, and discloses a single-pile variable-diameter rock-socketed secant pile which comprises a soil layer pile section and a rock pile section which are used for being embedded into a rock layer and a soil layer, and an inverted trapezoidal cambered surface is arranged at the transition position of the side face of the soil layer pile section and the side face of the rock pile section and corresponds to the bordering position of the rock layer and the soil layer. According to the single-pile variable-diameter rock-socketed secant pile, a plurality of diameter changes of the trapezoidal transition surface of the soil layer pile section and the conical surface of the upper rock pile section provide enough rock secant points, so that the whole single-pile variable-diameter rock-socketed secant pile is more stable, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the field of interlocking piles, in particular to a single-pile variable-diameter rock-embedded interlocking pile. Background Art

[0002] In actual construction, we often encounter rock layers and caves of a certain depth that are unexpected under the soil layer. If we continue to use full-casing drill rigs, drilling will be very difficult and the construction progress will be greatly slowed down. In order to catch up with the progress of the project, some construction units will use rock-embedded equipment to continue drilling, such as rotary drilling rigs, down-the-hole hammers, impact drills, etc. Since the construction diameter of the rock-embedded equipment (i.e. the diameter of the rock-embedded drill tool) is smaller than the steel casing diameter of the full-casing drill rig, the hole diameter drilled in the rock section will be smaller than the standard design hole diameter of the soil section. After casting into continuous bite piles, the bite layer of the soil section often meets the engineering requirements, while the bite layer of the rock section is often insufficient, or even has no bite at all, resulting in the inability to guarantee construction quality and the existence of safety hazards. For this reason, we propose a single-pile variable-diameter rock-embedded bite pile. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a single-pile variable-diameter rock-embedded interlocking pile, which solves the above-mentioned problems.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a single-pile variable-diameter rock-embedded interlocking pile, comprising a soil pile section and a rock pile section for embedding into the rock layer and the soil layer, a transition between the soil pile section and the side of the rock pile section is provided with an inverted trapezoidal arc surface corresponding to the junction of the rock layer and the soil layer, and a step surface is provided at the intersection of the end face of the rock pile section and the inverted trapezoidal arc surface.

[0007] Preferably, the trapezoidal arc surface is composed of a trapezoidal transition surface of the soil layer pile section and a conical surface of the rock pile section. The front inclination angle of the trapezoidal transition surface of the soil layer pile section is the same as the inclination angle of the conical surface of the rock pile section. The trapezoidal transition surface of the soil layer pile section is used to insert into the soil layer area, and the conical surface of the rock pile section is used to insert into the rock layer area.

[0008] Preferably, the trapezoidal transition surface of the soil pile section is arranged at a position corresponding to the soil layer at the lower end of the soil pile section, and the conical surface of the rock pile section is arranged at a position corresponding to the rock layer at the upper end of the rock pile section.

[0009] Preferably, a large-diameter rock pile segment is provided at the lower end position of the rock pile segment corresponding to the cone surface of the upper rock pile segment, and the diameter of the large-diameter rock pile segment is the same as the maximum diameter of the end of the cone surface of the upper rock pile segment.

[0010] Preferably, the step surface is formed by the large-diameter rock pile section and the end of the rock pile section.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the utility model provides a single-pile variable-diameter rock-embedded interlocking pile, which has the following beneficial effects:

[0013] 1. The single-pile variable-diameter rock-embedded engaging pile, the trapezoidal transition surface of the soil layer pile section and the multiple diameter changes of the conical surface of the rock pile section provide sufficient rock engaging points, making the present invention more stable as a whole and reducing safety hazards.

[0014] 2. For this single-pile variable-diameter rock-embedded interlocking pile, the diameters of the soil pile section, the cone surface of the pile section on the rock, and the large-diameter rock pile section are larger than the diameter of the rock pile section, ensuring that the pile diameter of the rock pile section is equal to the designed pile diameter, thereby ensuring that the rock pile section has a qualified interlocking thickness and the construction quality of the entire interlocking pile, that is, the designed interlocking pile center distance remains unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a single-pile variable-diameter rock-embedded interlocking pile;

[0016] Figure 2 It is a top view schematic diagram of a single-pile variable-diameter rock-embedded interlocking pile;

[0017] Figure 3 It is the side view of a single pile with variable diameter and rock-embedded interlocking pile.

[0018] In the figure: 1. soil layer pile section; 2. trapezoidal transition surface of soil layer pile section; 3. conical surface of rock pile section; 4. large diameter rock pile section; 5. rock pile section; 6. rock layer; 7. soil layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 A single-pile variable-diameter rock-embedded interlocking pile comprises a soil pile segment 1 and a rock pile segment 5 for embedding into a rock layer 6 and a soil layer 7. An inverted trapezoidal arc surface is provided at the transition point between the soil pile segment 1 and the side of the rock pile segment 5 corresponding to the junction of the rock layer 6 and the soil layer 7, and a step surface is provided at the intersection of the end face of the rock pile segment 5 and the inverted trapezoidal arc surface.

[0021] Furthermore, the trapezoidal arc surface is composed of a trapezoidal transition surface 2 of the soil layer pile section and a conical surface 3 of the rock layer pile section. The front inclination angle of the trapezoidal transition surface 2 of the soil layer pile section is the same as the inclination angle of the conical surface 3 of the rock layer pile section. The trapezoidal transition surface 2 of the soil layer pile section is used to insert into the area of ​​the soil layer 7, and the conical surface 3 of the rock layer pile section is used to insert into the area of ​​the rock layer 6.

[0022] Furthermore, the soil pile segment trapezoidal transition surface 2 is arranged at the position of the lower end of the soil pile segment 1 corresponding to the soil layer 7, and the rock pile segment conical surface 3 is arranged at the position of the upper end of the rock pile segment 5 corresponding to the rock layer 6.

[0023] Furthermore, a rock large diameter pile segment 4 is arranged at the lower end position of the rock pile segment 5 corresponding to the rock upper pile segment conical surface 3, and the diameter of the rock large diameter pile segment 4 is the same as the maximum diameter of the end of the rock upper pile segment conical surface 3.

[0024] Furthermore, the step surface is formed by the ends of the rock large diameter pile section 4 and the rock pile section 5 .

[0025] Working principle: When encountering geological conditions with soil on top and rock on the bottom, first make a guide wall on the ground, then use a special steel pipe with an expanded diameter of 100-200mm, and use a casing drill to perform a series of operations such as casing and sinking pipes in the soil layer and the upper rock section until the rock layer reaches 2000-10000mm, and then take soil and gravel. After taking soil, replace the rock embedding tool (such as rotary drilling equipment, down-the-hole hammer, impact drill, etc.) to perform rock embedding operations. After the rock embedding reaches the designed depth and aperture, remove the stones in the pile hole of the rock lower section pile 3, put in a steel cage (or directly pour concrete), pour concrete, pull out the steel casing, and carry out the construction of the next interlocking pile.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-pile variable-diameter rock-embedded pile, characterized in that: The invention comprises a soil pile section (1) and a rock pile section (5) for embedding into a rock layer (6) and a soil layer (7); an inverted trapezoidal arc surface is provided at a transition point between the soil pile section (1) and the side of the rock pile section (5) corresponding to the junction of the rock layer (6) and the soil layer (7); and a step surface is provided at the intersection of the end face of the rock pile section (5) and the inverted trapezoidal arc surface.

2. The single-pile variable-diameter rock-embedded interlocking pile according to claim 1, characterized in that: The trapezoidal arc surface is composed of a soil layer pile section trapezoidal transition surface (2) and a rock pile section conical surface (3). The front inclination angle of the soil layer pile section trapezoidal transition surface (2) is the same as the inclination angle of the rock pile section conical surface (3). The soil layer pile section trapezoidal transition surface (2) is used to insert into a soil layer (7) area, and the rock pile section conical surface (3) is used to insert into a rock layer (6) area.

3. The single-pile variable-diameter rock-embedded interlocking pile according to claim 2, characterized in that: The soil pile segment trapezoidal transition surface (2) is arranged at a position corresponding to the soil layer (7) at the lower end of the soil pile segment (1), and the rock pile segment conical surface (3) is arranged at a position corresponding to the rock layer (6) at the upper end of the rock pile segment (5).

4. The single-pile variable-diameter rock-embedded interlocking pile according to claim 2, characterized in that: A rock large diameter pile section (4) is arranged at a position on the rock pile section (5) corresponding to the lower end of the rock upper pile section conical surface (3); the diameter of the rock large diameter pile section (4) is the same as the maximum diameter of the end of the rock upper pile section conical surface (3).

5. The single-pile variable-diameter rock-embedded interlocking pile according to claim 4, characterized in that: The step surface is formed by the end of the rock large diameter pile section (4) and the rock pile section (5).

Images