Adjustable cross wire initial phase combined drill bit for deep mixing pile machine

A deep mixing pile, initial phase technology, applied in the direction of drill bits, sheet pile walls, drilling equipment, etc., can solve problems such as blade collision, achieve the effect of ensuring smooth progress and solving collision problems

Active Publication Date: 2018-11-16
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an adjustable reticle initial phase combination drill bit for deep-layer mixing pile drivers.

Method used

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  • Adjustable cross wire initial phase combined drill bit for deep mixing pile machine
  • Adjustable cross wire initial phase combined drill bit for deep mixing pile machine
  • Adjustable cross wire initial phase combined drill bit for deep mixing pile machine

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] The invention is used in a certain pouring construction project with a mixing depth of 10m for a deep mixing pile machine, and the specific assembly conditions and requirements are as follows:

[0018] The present invention proposes an adjustable cross-hair initial phase combination drill bit for deep mixing pile machine. Before assembly, the initial phase between the blades of adjacent drill bits in the same layer is determined according to the mixing depth, and the initial phase is obtained according to a certain pouring construction project overview The elastic modulus E of the drill pipe is 206850000kN / m 2 , The moment of inertia of the drill pipe is 0.00003586m 4 , The density of the mixed cement mortar is 1900kg / m 3 , The binding force of cement mortar is 0kPa, the internal friction angle of cement mortar is 35°, and the calculated value of gravity g is 10N / kg. When drilling 10m, the calculated turnover radius is 62.7mm. According to the attached ...

Example Embodiment

[0021] Example 2:

[0022] The present invention is used in a certain pouring construction project with a mixing depth of 11.5m for a deep mixing pile machine. The specific assembly conditions and requirements are as follows: The present invention proposes an adjustable cross-wire initial phase combination drill for deep mixing pile machine application The structure of the deep mixing pile machine is the same as that of Example 1. The calculation parameters of a pouring construction project with a mixing depth of 11.5 m are the same as those in the case of Example 1 except for the mixing depth. When drilling 11.5m, the calculated turnover radius is 109.8mm. According to the attached figure 2 The dotted line shown in the figure represents the trajectory of the drill axis rotation with a radius of 109.8mm. Take the example where the axis distance between adjacent drill bits is 450mm. At this time, the diameter of the drill bit is 350mm, that is, the length of the blade in the sam...

Example Embodiment

[0023] Example 3:

[0024] The present invention is used in a certain pouring construction project with a mixing depth of 13.8m for a deep mixing pile machine. The specific assembly conditions and requirements are as follows: The adjustable cross wire initial phase combination drill for deep mixing pile machine proposed by the present invention is applied to The structure of the deep mixing pile machine is the same as that of Example 1, and the calculation parameters of a pouring construction project with a mixing depth of 13.8m are the same as the calculation parameters of the engineering situation in Example 1, except for the mixing depth. When drilling 13.8m, the calculated turnover radius is 227.6mm. According to the attached figure 2 The dashed line shown in the figure represents the trajectory of the bit axis with a radius of 227.6mm. Take the example where the axis distance between adjacent drill bits is 450mm. At this time, the diameter of the drill bit is 350mm, that i...

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Abstract

The invention relates to an adjustable cross wire initial phase combined drill bit for a deep mixing pile machine. The adjustable cross wire initial phase combined drill bit for the deep mixing pile machine comprises three identical drill bit bodies. The drill bit bodies comprise upper blades (1), slurry leakage holes (2), lower blades (3) and fishtail pieces (4), wherein the upper blades (1) andthe lower blade (3) are all perpendicularly arranged above the drill bit bodies at 90 degrees, the slurry leakage holes (2) are positioned between the upper blades (1) and the lower blades (3), the slurry leakage holes are arranged at an included angle of 45 degrees downward, and the fishtail pieces (4) are positioned at the tail end of the drill bit; and the upper blade (1) on each drill bit bodyis perpendicularly arranged with the lower blade (3) on each drill bit body. The adjustable cross wire initial phase combined drill bit for the deep mixing pile machine is characterized in that the initial phase combination included angle of the upper blades (1) between the adjacent drill bit bodies is 22-90 degrees, and when the initial phase included angle is 90 degrees, the probability of collision between the upper blades (1) on adjacent drill bit bodies or the lower blades (3) on adjacent drill bit bodies is zero. The adjustable cross wire initial phase combined drill bit for the deep mixing pile machine ensures the smooth progress of the pouring construction process.

Description

technical field [0001] The invention belongs to the technical field of stirring pile equipment, and in particular relates to an adjustable reticle initial phase combination drill bit for a deep stirring pile machine. Background technique [0002] Deep mixing pile three-head drilling rig is a commonly used mixing pile equipment for water seepage interception projects. Generally, two sequences are used to form walls instead of one sequence. During the mixing process, the drill rods on both sides rotate clockwise, and the drill rods in the middle rotate counterclockwise. Usually, the axial center distance between two adjacent drill bits is 450mm. When the mixing depth does not exceed 10m, the value of the ground stress at this depth is small. The effect of extrusion is small. At this time, the axis of the drill pipe can be considered to be at the same point under the condition of high-speed operation. In the traditional three-axis combined drill bit, the included angle betwe...

Claims

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Application Information

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IPC IPC(8): E21B10/00E02D5/46
CPCE02D5/46E21B10/00
Inventor 孙树林吴正松姜华孙建东张德恒
Owner HOHAI UNIV
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