WO2022057437A1

WO2022057437A1 - Stirring pile construction apparatus provided with stirring cage

Info

Publication number: WO2022057437A1
Application number: PCT/CN2021/107744
Authority: WO
Inventors: 宋伟民; 刘全林; 宋雪清; 盛晓幸
Original assignee: 上海强劲地基工程股份有限公司
Priority date: 2020-09-15
Filing date: 2021-07-22
Publication date: 2022-03-24

Abstract

A stirring pile construction apparatus provided with a stirring cage (6). The construction apparatus comprises a pile frame (1), a drill rod (2) is provided on the pile frame (1), the hollowed-out stirring cage (6) is sleeved on the lower portion of the drill rod (2), stirring blades (61) are provided in the stirring cage (6), and the lower portion of the drill rod (2) is provided with drill rod blades (21). The construction apparatus is provided with the stirring cage (6), thus ensuring that the front end of the drill rod (2) does not shake and ensuring vertical downward drilling in a drilling process. The drill rod blades (21) and the stirring blades (61) interact with each other within the range of the stirring cage (6), cement slurry is fully stirred, and the pile-forming effect is good.

Description

Mixing pile construction equipment with mixing cage

technical field

The invention relates to the technical field of civil engineering, in particular to a foundation construction equipment.

Background technique

Mixing pile construction machinery, in the construction process, usually uses a mixing pile driver for construction. The mixing pile driver is provided with a drill pipe, and the drill pipe is provided with a stirring blade. The stirring blade rotates to cut the soil layer and mix the cement slurry with the undisturbed soil to form a flow. state cement.

During the rotation of the stirring blade, the cement and soil will be consolidated, and the solidified cement and soil will adhere to the stirring blade, and the stirring blade will lose its stirring function. That is to say, when the stirring blade is constructed in the cohesive soil layer, the clay is easy to stick to the stirring blade and rotate together with the blade, which affects the pile stirring effect.

The rigidity of the traditional pile-planting drill pipe is low, and the verticality and cylindricity of the pile are poor, which affects the pile-forming effect on the one hand, and wastes the cement slurry on the other hand.

Therefore, it is very urgent to design a new type of mixing pile construction equipment.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the problems existing in the prior art and provide a stirring pile construction equipment with a stirring cage.

In order to solve the above-mentioned problems, the technical scheme of the present invention is as follows:

A stirring pile construction equipment with a stirring cage includes a pile frame on which a drill pipe is arranged, a hollow stirring cage is sleeved on the lower part of the drill pipe, a stirring blade is arranged in the stirring cage, and a drill pipe blade is arranged on the lower part of the drill pipe.

The center of the stirring cage is provided with a shaft sleeve for stabilizing the drill rod, the drill rod passes through the middle of the shaft sleeve, and the drill rod rotates within the limit range of the shaft sleeve.

There are two shaft sleeves for stabilizing the drill pipe, which are located in the lower part and the upper part of the stirring cage respectively.

The stirring blades and the drill rod blades are arranged in a mutually staggered manner.

The stirring cage is fixed and does not rotate, and the stirring cage moves up and down with the drill rod when the drill rod is raised and lowered.

The drill pipe is provided with an outer casing, and the lower end of the outer casing is connected to the stirring cage.

The casing and the pile frame are connected by a guide slider, and the casing slides up and down through the guide slider.

The stirring cage is relatively fixed, the casing is also relatively fixed, the drill pipe is relatively rotated, and the stirring cage moves up and down with the drill pipe when the drill pipe rises and falls.

The stirring cage is a rotatable stirring cage, and the stirring cage and the drill rod rotate respectively, and the stirring cage rises and falls with the drill rod when the drill rod is lifted and lowered.

The stirring cage rotates in the opposite direction to the drill pipe.

The stirring cage rotates in the same direction as the drill pipe, but at different speeds.

A power head is arranged on the pile frame, the power head is provided with two output ends, and the two output ends with different directions are respectively connected to the casing and the drill pipe.

The drill pipe and the casing are respectively connected with a set of power devices, and each set of power devices is connected with an output end.

The drill pipe and the casing share a set of power device, and the power device connects the two output ends through a gearbox.

There is no outer casing on the drill pipe, the stirring cage is sleeved on the drill pipe through the shaft sleeve, and the stirring cage itself is not driven by power.

The stirring cage is a cylindrical grid structure.

The upper part of the stirring cage is provided with a closing opening, and the closing opening is connected to the bottom end of the casing.

A butt flange is arranged at the closing mouth, and a butt flange is arranged at the bottom end of the casing, and the stirring cage and the casing are fixed by bolts and the butt flange.

The stirring cage is a rotatable vertical frame structure, the upper end and the lower end of the frame structure are a horizontal plate, the horizontal plate is connected with the shaft sleeve, the other end of the horizontal plate is connected with the vertical plate, and the stirring blade is arranged inside the vertical plate; two One horizontal plate, one vertical plate and stirring blades inside the vertical plate form a stirring frame, and the stirring cage is composed of n stirring frames arranged on the circumference of the drill pipe.

The n stirring frames are evenly and symmetrically arranged on the drill pipe.

The n stirring frames are asymmetrically arranged on the drill pipe.

Beneficial effects: The stirring pile construction equipment of the present invention is provided with a stirring cage to ensure that the front end of the drill pipe does not shake, and to ensure that the drilling is carried out vertically during the drilling process. The mixing blades interact with the drill pipe blades within the range of the mixing cage, the cement slurry is fully stirred, and the pile forming effect is good.

A stirring blade is arranged on the stirring cage, and the drill rod blade and the stirring blade perform relative cutting motion. When the drill rod blade sweeps the stirring blade, the clay adhering to the drill rod blade is cleaned up, thereby improving the pile stirring effect.

The drill pipe casing is increased to increase the drill pipe cross-sectional area, thereby improving the bending resistance interface coefficient and improving the drill pipe rigidity.

Description of drawings

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments;

FIG. 1 is a schematic diagram of the overall structure of a stirring pile construction equipment with a stirring cage according to the present invention.

FIG. 2 is a schematic diagram of the assembly of each part of the drilling tool according to the present invention.

FIG. 3 is a schematic structural diagram of the stirring cage and the drill bit according to the present invention.

FIG. 4 is a schematic diagram of the result after disassembling the stirring cage according to the present invention.

FIG. 5 is a schematic cross-sectional view of the casing according to the present invention.

FIG. 6 is a schematic structural diagram of a rotatable vertical frame structure stirring cage and a drill bit in Example 3. FIG.

FIG. 7 is a schematic view of the disassembled structure of the rotatable vertical frame structure stirring cage in Embodiment 3. FIG.

detailed description

In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific figures.

The equipment in this embodiment is a single-shaft drilling rig equipment, which is used for cutting and stirring the soil at the pile position, mixing with a curing agent to form a cement-soil mixing body, and inserting the prefabricated pile body to form a composite pile foundation.

Embodiment 1, referring to Fig. 1 and Fig. 2, the equipment comprises a pile frame 1, and a drill pipe 2 is arranged on the pile frame, and the drill pipe 2 is used to form a cement-soil mixing pile; Motor is installed. A stirring cage 6 is provided at the front end of the drill pipe.

Referring to FIGS. 3 and 4 , the stirring cage 6 is in the shape of a hollow cage, sleeved on the lower part of the drill rod, and drill rod blades are provided on this part of the drill rod, and corresponding stirring blades 61 are provided inside the stirring cage 6 . The stirring blades 61 of the stirring cage and the drill rod blades 21 of the drill rod are misaligned and do not interfere with each other. During operation, the stirring cage and the stirring blades do not rotate, and the rotation of the drill rod drives the rotation of the drill rod blades.

The stirring cage 6 has a cylindrical grid-shaped structure, and a closing opening 62 is arranged on the upper part of the stirring cage, and the closing opening 62 is connected to the bottom end of the casing. The stirring cage 6 is fixed with the casing 4 . In order to facilitate docking and disassembly, the closing port 62 is provided with a butt flange, and the bottom end of the casing 4 is provided with a butt flange, and the stirring cage 6 and the casing 4 are fixed by bolts and the butt flange.

If the pile frame is not provided with a casing, the stirring cage 6 is not provided with a closing opening, and the stirring cage 6 is only a cylindrical grid-shaped structure.

A shaft sleeve 63 for stabilizing the drill rod is arranged in the stirring cage 6, the shaft sleeve is fixed inside the stirring cage, the drill rod passes through the middle of the shaft sleeve, and the shaft sleeve 63 makes the drill rod rotate around the center without shaking. There are two shaft sleeves for stabilizing the drill pipe, which are located in the lower part and the upper part of the stirring cage respectively.

The foremost end of the drill pipe is the drill bit 22 , and the drill bit extends out of the lower boundary of the stirring cage 6 .

Referring to Fig. 5, further, a casing is provided on the drill rod 2, and the drill rod is located in the center of the casing. The drill rod 2 rotates, while the casing is fixed relative to the drill rod 2 and does not rotate. The upper end of the sleeve is connected to the casing of the power head. A slidable guide slider 5 is arranged in the middle of the casing, the guide slider 5 is hooped on the outside of the casing, and the other side of the guide slider 5 is arranged on the guide frame of the pile frame 1. When the casing is lifted and lowered, the guide slider 5 will rise and fall with it. . A stirring cage 6 is connected to the lower end of the sleeve. The cross section of the casing is cross-shaped, the left and right sides of the casing are channel steel with an outward opening, the front and rear sides of the casing are channel steel with an inward opening, and the guide slider 5 is stuck in the outward opening of the channel steel groove. The upper part of the stirring cage is provided with a closing opening, and the closing opening is connected to the bottom end of the casing. The stirring cage 6 is fixed with the casing and does not rotate.

During the drilling process, the casing is fixed and does not rotate, and the stirring cage does not rotate. Only the drill pipe rotates, which effectively ensures the verticality of the cement-soil pile body during the drilling process. The verticality deviation is within 0.5%.

Referring to FIG. 5 , the sleeve is surrounded by four channel steels, the channel steels are concave in cross section, and the concave openings are outward. One side of the guide slider 5 hoops the casing, and the other side hoops the guide frame. The guide slider 5 is connected to the power head shell through a flexible rope. When the drill pipe is fully lifted, the flexible rope lifts the guide slider 5 to At the middle position of the drill pipe height, when drilling down, the guide slider 5 descends accordingly. When the guide slider falls to the position of the casing at the bottom of the drill pipe, the casing prevents the guide slider 5 from continuing to fall, and the guide slider and the power head are connected. The distance between them is shortened until the drill down is completed. When lifting, when the power head is lifted to half the height, the flexible rope is straightened, and then the guide slider 5 is pulled up until the lifting is completed.

Embodiment 2, the drill pipe is provided with a circular casing, and the drill pipe is located in the center of the casing. The drill pipe 2 rotates, and the casing can rotate in the opposite direction relative to the drill pipe. The upper end of the sleeve is connected to one torque output end of the power head. A stirring cage is connected to the lower end of the casing. The power head drives the casing to rotate, and the casing drives the stirring cage to rotate. The stirring cage can be rotated relatively independently from the drill pipe, and the rest are the same as in Example 1.

Referring to Figure 6 and Figure 7, Embodiment 3, the stirring cage 6 is a rotatable vertical frame structure, the upper and lower ends of the frame are a horizontal plate 64, the horizontal plate is connected to the shaft sleeve, and the other end of the horizontal plate is connected to the vertical plate 65. , the stirring blade is arranged on the inner side of the vertical plate; two horizontal plates 64, a vertical plate 65 and the stirring blade 61 on the inner side of the vertical plate form a stirring surface, and the stirring cage 6 is composed of a plurality of stirring surfaces arranged on the circumference of the drill pipe. .

The stirring blades 61 and the drill rod blades 21 are arranged in a cross and staggered arrangement. The stirring blade 61 and the drill pipe blade 21 have mutual cutting action, the cement slurry is fully stirred, and the pile forming effect is good.

In this embodiment, the upper end and the lower end of the stirring cage 6 are set on the drill pipe through the shaft sleeve 63, which rises and falls together with the lifting and lowering of the drill pipe. The drill pipe rotates to achieve soil mixing within the range of the mixing cage. The rest are the same as in Example 1 or Example 2.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above examples, the above examples and descriptions only illustrate the principles of the present invention, and the present invention will have various changes without departing from the spirit and scope of the present invention. and improvements, which fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims

The stirring pile construction equipment with a stirring cage includes a pile frame on which a drill rod is arranged, and is characterized in that a hollow stirring cage is sleeved at the lower part of the drill rod; Rod leaves.
The stirring pile construction equipment with a stirring cage according to claim 1, wherein the center of the stirring cage is provided with a shaft sleeve for stabilizing the drill rod, the drill rod passes through the middle of the shaft sleeve, and the drill rod is limited by the shaft sleeve rotate within the range.
The stirring pile construction equipment with a stirring cage according to claim 1 is characterized in that there are at least two shaft sleeves for stabilizing the drill pipe, and the two shaft sleeves are respectively located in the lower part and the upper part of the mixing cage.
The stirring pile construction equipment with a stirring cage according to claim 1, wherein the stirring blades and the drill pipe blades are mutually dislocated.
The stirring pile construction equipment with a stirring cage according to claim 1, wherein the stirring cage is fixed and does not rotate, and the stirring cage moves up and down with the drill rod when the drill pipe is lifted and lowered.
The agitating pile construction equipment with a stirring cage according to claim 1, wherein the drill pipe is provided with an outer casing, and the lower end of the outer casing is connected to the stirring cage.
The agitating pile construction equipment with a stirring cage according to claim 6, wherein the casing and the pile frame are connected by a guide slider, and the casing slides up and down through the guide slider.
The stirring pile construction equipment with a stirring cage according to claim 7 is characterized in that, the stirring cage is relatively fixed, the casing is also relatively fixed, the drill pipe is relatively rotated, and the stirring cage moves up and down with the drill pipe when the drill pipe is raised and lowered.
The stirring pile construction equipment with a stirring cage according to claim 6, wherein the stirring cage is a rotatable stirring cage, the stirring cage and the drill rod rotate respectively, and the stirring cage rises and falls with the drill rod when the drill rod is lifted and lowered. .
The stirring pile construction equipment with a stirring cage according to claim 9, wherein the rotation direction of the stirring cage and the drill pipe is opposite.
The stirring pile construction equipment with a stirring cage according to claim 9 is characterized in that the rotation direction of the stirring cage and the drill pipe are the same, and the speed is different.
The stirring pile construction equipment with a stirring cage according to claim 9, wherein a power head is provided on the pile frame, the power head is provided with two output ends, and the two output ends with different directions are respectively connected with sleeves Pipe and drill pipe.
The stirring pile construction equipment with a stirring cage according to claim 12, wherein the drill pipe and the casing are respectively connected to a set of power devices, and each set of power devices is connected to an output end.
The agitating pile construction equipment with a stirring cage according to claim 12, wherein the drill pipe and the casing share a set of power device, and the power device is connected to the two output ends through a gearbox.
The stirring pile construction equipment with stirring cage according to claim 1 is characterized in that, there is no outer casing on the drill rod, the stirring cage is sleeved on the drill rod through the shaft sleeve, and the stirring cage itself is not driven by power.
The stirring pile construction equipment with a stirring cage according to claim 1 is characterized in that, the stirring cage is a cylindrical grid-shaped structure.
The stirring pile construction equipment with a stirring cage according to claim 16, wherein the upper part of the stirring cage is provided with a closing opening, and the closing opening is connected to the bottom end of the casing.
The agitating pile construction equipment with a stirring cage according to claim 17, characterized in that, a butt flange is provided at the closing end, and a butt flange is provided at the bottom end of the casing, and the stirring cage and the casing are fixed by bolts and the butt flange. .
The stirring pile construction equipment with a stirring cage according to claim 1, wherein the stirring cage is a rotatable vertical frame structure, the upper end and the lower end of the frame structure are a horizontal plate, and the horizontal plate is connected to the shaft The other end of the horizontal plate is connected to the vertical plate, and the stirring blade is arranged inside the vertical plate; two horizontal plates, one vertical plate and the stirring blade inside the vertical plate form a stirring frame, and the stirring cage is arranged on the circumference of the drill pipe. of n stirring frames.
The stirring pile construction equipment with a stirring cage according to claim 19, wherein the n stirring frames are evenly and symmetrically arranged on the drill pipe.
The stirring pile construction equipment with a stirring cage according to claim 20, wherein the n stirring frames are asymmetrically arranged on the drill pipe.