CN108487869B - Multifunctional double-sleeve rotary drilling machine drill rod and construction method thereof - Google Patents
Multifunctional double-sleeve rotary drilling machine drill rod and construction method thereof Download PDFInfo
- Publication number
- CN108487869B CN108487869B CN201810318900.9A CN201810318900A CN108487869B CN 108487869 B CN108487869 B CN 108487869B CN 201810318900 A CN201810318900 A CN 201810318900A CN 108487869 B CN108487869 B CN 108487869B
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- drill rod
- rod
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- drill
- grouting
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- 238000005553 drilling Methods 0.000 title claims abstract description 47
- 238000010276 construction Methods 0.000 title claims description 17
- 239000002002 slurry Substances 0.000 claims abstract description 64
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000004567 concrete Substances 0.000 claims abstract description 10
- 239000002893 slag Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 abstract description 2
- 239000011440 grout Substances 0.000 description 8
- 230000009977 dual effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
Abstract
The invention relates to a multifunctional double-sleeve rotary drilling machine drill rod, which comprises: an inner drill rod and an outer drill rod; one side of the inner drill rod is provided with a plurality of inner slurry leakage holes from bottom to top; the outer drill rod is sleeved outside the inner drill rod, and a plurality of slurry leakage holes are arranged on one side of the outer drill rod from bottom to top; the inner slurry leakage holes and the outer slurry leakage holes at the corresponding positions of the inner drill rod and the outer drill rod have the same size; the top of the inner drill rod is provided with an inner flange plate, and the bottom of the inner drill rod is provided with an inner cutter head; the top of the outer drill rod is provided with an outer flange plate, and the bottom of the outer drill rod is provided with an outer cutter head. The invention adopts the design of the inner and outer double-sleeve drill rods, realizes directional grouting when two grouting holes of the inner and outer drill rods are aligned while drilling, and can avoid grouting for soil layers which do not need to be reinforced in all directions. In addition, by adjusting the overlapping area of the inner slurry discharging hole and the outer slurry discharging hole, the slurry spraying pressure can be adjusted, and grouting reinforcement on soil layers under different conditions is completed. The drill rod can be left underground, the steel reinforcement cage is placed in the drill rod, concrete is poured into the drill rod, the pile can be formed, the influence on surrounding buildings in the pile forming process is small, and the pile body strength is high.
Description
Technical Field
The invention belongs to the technical field of engineering machinery, and particularly relates to a multifunctional double-sleeve rotary drilling machine drill rod and a construction method thereof.
Background
In recent years, the urban development of China is rapid, the ground traffic jam is serious, people pay more attention to the utilization of underground space resources, and the development trend of various large and medium cities of China is realized by building subways and related supporting facilities for relieving the ground traffic pressure. When a pile foundation of a newly built structure is constructed around an existing subway tunnel, the subway structure is adversely affected. Therefore, grouting reinforcement measures should be adopted in advance for the land within a certain depth range adjacent to the subway tunnel so as to reduce the deflection, settlement and excessive deformation of the subway tunnel structure possibly caused in the construction process of the new building pile foundation.
The existing rotary drilling machine only has a single drilling function, and grouting reinforcement construction operation of soil before drilling and piling cannot be completed. Moreover, when the existing rotary drilling machine is used for drilling, the outside of the drill rod is in direct contact with the soil body, drilling is carried out, and the surrounding soil body is greatly disturbed in the construction process. When pile is formed, the drill rod is pulled out firstly, the concrete guide pipe is reinserted after the steel reinforcement cage is put in, and the concrete is poured on one side and the guide pipe is lifted on the other side, so that the construction operation is complicated.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the multifunctional double-sleeve rotary drilling machine drill rod and the construction method thereof, which can realize unidirectional grouting in a certain range and simultaneously pile, and have the advantages of simple structure and strong usability. The overlapping area of the inner slurry leakage holes and the outer slurry leakage holes is adjusted by rotating the inner drill rod so as to change the grouting pressure, and after the drilling is finished, different soil layers can be subjected to directional grouting reinforcement. The drill rod can be reserved underground, so that the collapse of the hole wall is prevented, and the disturbance to surrounding soil bodies in the whole drilling and piling process is small.
The invention provides a multifunctional double-sleeve rotary drilling machine drill rod, which comprises: an inner drill rod and an outer drill rod; a plurality of inner slurry leakage holes are arranged on one side of the inner drill rod from bottom to top; the outer drill rod is sleeved outside the inner drill rod, and a plurality of slurry leakage holes are arranged on one side of the outer drill rod from bottom to top; the sizes of the inner slurry leakage holes and the outer slurry leakage holes at the corresponding positions of the inner drill rod and the outer drill rod are the same; the two drill rods are hollow tubular, and a gap with a certain distance is reserved between the two drill rods; the top of the inner drill rod is provided with an inner flange plate, and the bottom of the inner drill rod is provided with an inner cutter head; the top of the outer drill rod is provided with an outer flange plate, and the bottom of the outer drill rod is provided with an outer cutter head.
In the multifunctional double-sleeve rotary drilling machine drill rod, the inner positioning hole is formed above the rod wall of the inner drill rod, the outer positioning hole is formed above the rod wall of the outer drill rod, and the positioning bolt is inserted into the outer positioning hole and the inner positioning hole during drilling so as to ensure that the inner drill rod and the outer drill rod do not rotate in a dislocation manner.
In the multifunctional double-sleeve rotary drill rod, the length of the inner drill rod is longer than that of the outer drill rod.
In the multifunctional double-sleeve rotary drill rod, the drill bit and the inner drill rod are connected through the inner flange plate during drilling so as to drive the drill rod to drill down at a constant speed.
In the multifunctional double-sleeve rotary drilling machine drill rod, a plurality of mark lines with different thicknesses are arranged on the rod walls of an inner drill rod and an outer drill rod from bottom to top along the circumferential direction, the mark lines corresponding to the central lines of the inner slurry leakage holes and the outer slurry leakage holes are thick lines, a thin mark line is arranged in other areas within the range of the hole width at intervals of 1 DEG, the inner drill rod is rotated according to the scales of the mark lines, and the overlapping area between the inner slurry leakage holes and the outer slurry leakage holes is adjusted so as to change the grouting pressure.
The multifunctional double-sleeve rotary drill rod further comprises a plurality of additional inner drill rods for lengthening the inner drill rod and a plurality of additional outer drill rods for lengthening the outer drill rod, wherein the number of the additional inner drill rods is the same as that of the additional outer drill rods, and the single-section length of the additional inner drill rods is larger than that of the additional outer drill rods; the two ends of the additional inner drill rod are provided with inner flanges, and the inner drill rod is lengthened by connecting the inner flanges; the two ends of the additional outer drill rod are provided with outer flanges, and the outer drill rod is lengthened by connecting the outer flanges;
a plurality of inner slurry leakage holes are arranged on one side of the additional inner drill rod from bottom to top; the additional outer drill rod is sleeved outside the additional inner drill rod, and a plurality of slurry leakage holes are arranged at one side of the additional outer drill rod from bottom to top; the sizes of the inner slurry leakage holes and the outer slurry leakage holes at the corresponding positions of the additional inner drill rod and the additional outer drill rod are the same; the two additional drill rods are hollow tubes, and a gap with a certain distance is reserved in the middle.
The invention also provides a construction method of the multifunctional double-sleeve rotary drilling machine drill rod, which comprises the following steps:
step 1: burying an orifice steel pile casing, ensuring accurate positioning and avoiding orifice collapse;
step 2: the drilling machine is in place, the outer drill rod is sleeved outside the inner drill rod, and the outer drill rod and the inner drill rod are fixed by a positioning bolt and cannot rotate relatively; the drill bit drives the drill rod to rotate and keep constant-speed drilling through the inner flange plate, the drill rod is ensured to be vertical in the process, the inner slurry leakage holes and the outer slurry leakage holes are in a staggered state, the drill rod is lengthened for multiple times according to the drilling depth, the sequence is that the positioning bolts on the inner drill rod and the outer drill rod are detached firstly, then the inner flange plate is connected with the additional inner drill rod, finally the outer flange plate is connected with the additional outer drill rod, and the two inner flange plates and the two outer flange plates are connected with each other through bolts;
step 3: in the drilling process, mud circulation is continuously adopted to remove slag, mud is injected into a drill rod, and soil slag is led out of the drill rod;
step 4: after drilling to the required depth, removing the drill bit of the drilling machine, rotating the inner drill rod according to the required grouting pressure and the marking lines, adjusting the overlapping area of the inner grouting holes and the outer grouting holes, and when the thick marking lines on the walls of the inner drill rod and the outer drill rod are completely overlapped, indicating that the grouting hole orifices of the inner drill rod and the outer drill rod are completely aligned; inserting a steel rod into the inner slurry discharging hole and the outer slurry discharging hole which are overlapped at the uppermost end, and fixing an inner drill rod and an outer drill rod;
step 5: after the adjustment is finished, a grouting core pipe with double plugs is put into the inner drill rod for grouting, so that the directional grouting operation on soil layers with different geological conditions is completed;
step 6: after grouting, a steel reinforcement cage is placed in the drill rod, concrete is poured, and finally piles can be achieved.
According to the multifunctional double-sleeve rotary drilling machine drill rod and the construction method thereof, the design of the inner and outer double-sleeve drill rods is adopted, directional grouting can be realized when two grouting holes of the inner and outer drill rods are aligned, and grouting can be avoided for soil layers which do not need omnibearing reinforcement. In addition, by adjusting the overlapping area of the corresponding slurry leakage holes inside and outside, the spraying pressure of the slurry can be adjusted, and grouting reinforcement of soil layers with different geological conditions is completed. After grouting is completed, the reinforced concrete can be directly put into a reinforcement cage and poured concrete to form piles, and the drill rod can be left underground without being lifted, so that on one hand, the collapse of the hole wall can be effectively prevented, and on the other hand, the disturbance of the construction process to surrounding soil is reduced.
The invention has the advantages of simple structure, convenient operation, material saving, strong practicability and reduced unnecessary pollution to geological environment.
Drawings
FIG. 1 is a perspective view of a multi-functional dual sleeve rotary drill pipe of the present invention;
FIG. 2 is a state diagram of a multi-functional dual sleeve rotary drill pipe as it rotates an inner drill pipe;
FIG. 3 is a cross-sectional view of a multi-functional dual sleeve rotary drill rod of the present invention;
FIG. 4 is a perspective view of the inner drill rod of the present invention;
fig. 5 is a perspective view of the outer drill rod of the present invention.
Detailed Description
As shown in fig. 1 to 5, a multi-functional dual sleeve rotary drill rod of the present invention includes: an inner drill rod 1 and an outer drill rod 2. A plurality of inner slurry leakage holes 51 are arranged on one side of the inner drill rod 1 from bottom to top; the outer drill rod 2 is sleeved outside the inner drill rod 1, and a plurality of slurry leakage holes 52 are arranged on one side of the outer drill rod from bottom to top. The inner slurry discharging holes 51 and the outer slurry discharging holes 52 at the corresponding positions of the inner drill rod 1 and the outer drill rod 2 are the same in size. The two drill rods are hollow tubular, and a gap with a certain distance is reserved between the two drill rods. The top of the inner drill rod 1 is provided with an inner flange 41, and the bottom of the inner drill rod is provided with an inner cutter head 61; the top of the outer drill rod 2 is provided with an outer flange 42, and the bottom is provided with an outer cutter head 62.
A drill bit is hung above the inner drill rod 1, and the drill bit is connected with the inner drill rod 1 through an inner flange 41 during drilling so as to drive the drill rod to drill down at a constant speed. The drill bit drives the drill rod to rotate, and the inner cutter 61 and the outer cutter 62 at the bottoms of the inner drill rod 1 and the outer drill rod 2 drill down at a constant speed, so that drilling is realized. An inner positioning hole 31 is formed above the rod wall of the inner drill rod 1, and an outer positioning hole 32 is formed above the rod wall of the outer drill rod 2. Before the drill is driven, the positioning bolts 9 are inserted into the outer positioning holes 32 and the inner positioning holes 31 to ensure that the inner drill rod 1 and the outer drill rod 2 do not rotate in a dislocation manner.
The length of the inner drill rod 1 is greater than the length of the outer drill rod 2. The inner drill rod 1 and the outer drill rod 2 are provided with a plurality of marking lines with different thicknesses along the circumferential direction from bottom to top, the marking lines at positions corresponding to the central lines of the inner slurry discharging holes 51 and the outer slurry discharging holes 52 are thick lines, and the other areas within the range of the hole width are provided with a thin marking line at intervals of 1 degree.
In specific implementation, the outer wall of the inner drill rod 1 is provided with a first thick identification line 71 and a plurality of first thin identification lines 72, and the outer wall of the outer drill rod 2 is provided with a second thick identification line 81 and a plurality of second thin identification lines 82. The inner drill rod 1 is rotated according to the scales of the mark lines, and the overlapping area between the inner leakage holes 51 and the outer leakage holes 52 is adjusted to change the grouting pressure.
As shown in fig. 1, the apertures of the inner grout holes 51 are all on a vertical straight line, the apertures of the outer grout holes 52 are all on a vertical straight line, and when the ground constructor rotates the inner drill rod 1 to align the first thick mark line 71 with the second thick mark line 81, the inner grout holes 51 and the outer grout holes 52 are aligned with the largest overlapping area. At this time, a steel rod is inserted into the uppermost grout hole to fix the inner drill rod 1 and the outer drill rod 2. At the same time, the alignment of the inner slurry discharging hole 51 and the outer slurry discharging hole 52 of the underground part can be ensured, thereby realizing directional grouting reinforcement.
As shown in fig. 2, a state diagram during rotation of the inner drill rod 1 is shown. The grout is poured out from the overlapping part of the two grout leakage holes, the caliber of the overlapping part is adjustable, the main purpose is to realize adjustable grouting pressure, different pressures can be adopted to spray the grout for soil layers under different geological conditions to strengthen, and the concrete situation is selected according to the actual situation during construction. The size of the overlapping area of the inner leakage holes 51 and the outer leakage holes 52 is determined by the mark lines on the rod walls of the inner drill rod and the outer drill rod, and the concrete operation method is as follows: and the overlapped state of scale marks on the rod walls of the inner drill rod 1 and the outer drill rod 2 is observed by rotating the inner drill rod 1, so that the overlapped area of the two slurry leakage holes is determined. When the first thick marking line 71 on the wall of the inner drill rod 1 and the second thick marking line 81 on the wall of the outer drill rod 2 are overlapped, the inner slurry discharging hole and the outer slurry discharging hole are completely overlapped, the grouting caliber is maximum, and the grouting pressure is minimum. In addition, each time the inner drill rod rotates along the outer drill rod, the inner drill rod rotates around the outer pipe by 1 degree through a thin marking line, namely the overlapping area of the inner and outer slurry discharging holes is reduced, the grouting caliber is reduced, and the grouting pressure is increased. The concrete construction can be adjusted according to the requirements, and directional grouting under different pressures can be performed. After the overlapping area is adjusted, steel bars with different thicknesses are inserted into the slurry leakage holes at the uppermost end according to the size of the overlapping area, and the inner drill rod 1 and the outer drill rod 2 are fixed.
As shown in fig. 3, the multifunctional dual-sleeve rotary drill rod of the present invention further comprises: the sections are used for lengthening the additional inner drill rod of the inner drill rod and the additional outer drill rod of the outer drill rod, the sections of the additional inner drill rod and the additional outer drill rod are the same, and the single-section length of the additional inner drill rod is larger than that of the additional outer drill rod; the two ends of the additional inner drill rod are provided with inner flanges, and the inner drill rod is lengthened by connecting the inner flanges; the two ends of the additional outer drill rod are provided with outer flanges, and the outer drill rod is lengthened by connecting the outer flanges; a plurality of inner slurry leakage holes are arranged on one side of the additional inner drill rod from bottom to top; the additional outer drill rod is sleeved outside the additional inner drill rod, and a plurality of slurry leakage holes are arranged at one side of the additional outer drill rod from bottom to top; the sizes of the inner slurry leakage holes and the outer slurry leakage holes at the corresponding positions of the additional inner drill rod and the additional outer drill rod are the same; the two additional drill rods are hollow tubes, and a gap with a certain distance is reserved in the middle.
When the drilling depth is deep, the inner drill rod 1 and the outer drill rod 2 need to be lengthened multiple times by the inner flange 41 and the outer flange 42. The construction sequence is that the positioning bolt 9 is detached firstly, then the inner drill rod 1 and the inner flange 41 of the additional inner drill rod are connected through bolts, the length of the inner drill rod 1 is prolonged, and finally the outer drill rod 2 and the outer flange 42 of the additional outer drill rod are connected through bolts, so that the length of the outer drill rod 2 is prolonged, and the drilling depth requirement is met.
The invention also provides a construction method of the multifunctional double-sleeve rotary drilling machine drill rod, which comprises the following steps:
step 1: burying an orifice steel pile casing, ensuring accurate positioning and avoiding orifice collapse;
step 2: the drilling machine is in place, the outer drill rod is sleeved outside the inner drill rod, and the outer drill rod and the inner drill rod are fixed by a positioning bolt and cannot rotate relatively; the drill bit drives the drill rod to rotate and keep constant-speed drilling through the inner flange plate, the drill rod is ensured to be vertical in the process, the inner slurry leakage holes and the outer slurry leakage holes are in a staggered state, the drill rod is lengthened for multiple times according to the drilling depth, the sequence is that the positioning bolts on the inner drill rod and the outer drill rod are detached firstly, then the inner flange plate is connected with the additional inner drill rod, finally the outer flange plate is connected with the additional outer drill rod, and the two inner flange plates and the two outer flange plates are connected with each other through bolts;
step 3: in the drilling process, mud circulation is continuously adopted to remove slag, mud is injected into a drill rod, and soil slag is led out of the drill rod;
step 4: after drilling to the required depth, removing the drill bit of the drilling machine, rotating the inner drill rod according to the required grouting pressure and the marking lines, adjusting the overlapping area of the inner grouting holes and the outer grouting holes, and when the thick marking lines on the walls of the inner drill rod and the outer drill rod are completely overlapped, indicating that the grouting hole orifices of the inner drill rod and the outer drill rod are completely aligned; inserting a steel rod into the inner slurry discharging hole and the outer slurry discharging hole which are overlapped at the uppermost end, and fixing an inner drill rod and an outer drill rod;
step 5: after the adjustment is finished, a grouting core pipe with double plugs is put into the inner drill rod for grouting, so that the directional grouting operation on soil layers with different geological conditions is completed;
step 6: after grouting, a steel reinforcement cage is placed in the drill rod, concrete is poured, and finally piles can be achieved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the scope of the invention, but rather to enable any modification, equivalent replacement, improvement or the like to be made without departing from the spirit and principles of the invention.
Claims (1)
1. The construction method of the multifunctional double-sleeve rotary drilling machine drill rod is characterized by comprising the following steps of: an inner drill rod and an outer drill rod; a plurality of inner slurry leakage holes are arranged on one side of the inner drill rod from bottom to top; the outer drill rod is sleeved outside the inner drill rod, and a plurality of slurry leakage holes are arranged on one side of the outer drill rod from bottom to top; the sizes of the inner slurry leakage holes and the outer slurry leakage holes at the corresponding positions of the inner drill rod and the outer drill rod are the same; the two drill rods are hollow tubular, and a gap with a certain distance is reserved between the two drill rods; the top of the inner drill rod is provided with an inner flange plate, and the bottom of the inner drill rod is provided with an inner cutter head; the top of the outer drill rod is provided with an outer flange plate, and the bottom of the outer drill rod is provided with an outer cutter head;
the method comprises the steps that a plurality of marking lines with unequal thickness are arranged on the rod walls of an inner drill rod and an outer drill rod from bottom to top along the circumferential direction, marking lines corresponding to the central lines of an inner slurry discharging hole and an outer slurry discharging hole are thick lines, a thin marking line is arranged in other areas within the range of the hole width at intervals of 1 DEG, the inner drill rod is rotated according to scales of the marking lines, and the overlapping area between the inner slurry discharging hole and the outer slurry discharging hole is adjusted so as to change grouting pressure;
the additional inner drill rods are used for lengthening the length of the inner drill rods, the additional outer drill rods are used for lengthening the length of the outer drill rods, the number of the additional inner drill rods is the same as that of the additional outer drill rods, and the single-section length of the additional inner drill rods is larger than that of the additional outer drill rods; the two ends of the additional inner drill rod are provided with inner flanges, and the inner drill rod is lengthened by connecting the inner flanges; the two ends of the additional outer drill rod are provided with outer flanges, and the outer drill rod is lengthened by connecting the outer flanges;
a plurality of inner slurry leakage holes are arranged on one side of the additional inner drill rod from bottom to top; the additional outer drill rod is sleeved outside the additional inner drill rod, and a plurality of slurry leakage holes are arranged at one side of the additional outer drill rod from bottom to top; the sizes of the inner slurry leakage holes and the outer slurry leakage holes at the corresponding positions of the additional inner drill rod and the additional outer drill rod are the same; the two additional drill rods are hollow tubular, and a gap with a certain distance is reserved in the middle;
an inner positioning hole is formed above the rod wall of the inner drill rod, an outer positioning hole is formed above the rod wall of the outer drill rod, and the positioning bolt is inserted into the outer positioning hole and the inner positioning hole during drilling so as to ensure that the inner drill rod and the outer drill rod do not rotate in a dislocation manner;
the length of the inner drill rod is longer than that of the outer drill rod;
when drilling, the drill bit and the inner drill rod are connected through the inner flange plate so as to drive the drill rod to drill down at a constant speed;
the construction method comprises the following steps:
step 1: burying an orifice steel pile casing, ensuring accurate positioning and avoiding orifice collapse;
step 2: the drilling machine is in place, the outer drill rod is sleeved outside the inner drill rod, and the outer drill rod and the inner drill rod are fixed by a positioning bolt and cannot rotate relatively; the drill bit drives the drill rod to rotate and keep constant-speed drilling through the inner flange plate, the drill rod is ensured to be vertical in the process, the inner slurry leakage holes and the outer slurry leakage holes are in a staggered state, the drill rod is lengthened for multiple times according to the drilling depth, the sequence is that the positioning bolts on the inner drill rod and the outer drill rod are detached firstly, then the inner flange plate is connected with the additional inner drill rod, finally the outer flange plate is connected with the additional outer drill rod, and the two inner flange plates and the two outer flange plates are connected with each other through bolts;
step 3: in the drilling process, mud circulation is continuously adopted to remove slag, mud is injected into a drill rod, and soil slag is led out of the drill rod;
step 4: after drilling to the required depth, removing the drill bit of the drilling machine, rotating the inner drill rod according to the required grouting pressure and the marking lines, adjusting the overlapping area of the inner grouting holes and the outer grouting holes, and when the thick marking lines on the walls of the inner drill rod and the outer drill rod are completely overlapped, indicating that the grouting hole orifices of the inner drill rod and the outer drill rod are completely aligned; inserting a steel rod into the inner slurry discharging hole and the outer slurry discharging hole which are overlapped at the uppermost end, and fixing an inner drill rod and an outer drill rod;
step 5: after the adjustment is finished, a grouting core pipe with double plugs is put into the inner drill rod for grouting, so that the directional grouting operation on soil layers with different geological conditions is completed;
step 6: after grouting, a steel reinforcement cage is placed in the drill rod, concrete is poured, and finally piles can be achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810318900.9A CN108487869B (en) | 2018-04-11 | 2018-04-11 | Multifunctional double-sleeve rotary drilling machine drill rod and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810318900.9A CN108487869B (en) | 2018-04-11 | 2018-04-11 | Multifunctional double-sleeve rotary drilling machine drill rod and construction method thereof |
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| Publication Number | Publication Date |
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| CN108487869A CN108487869A (en) | 2018-09-04 |
| CN108487869B true CN108487869B (en) | 2024-03-22 |
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| CN201810318900.9A Active CN108487869B (en) | 2018-04-11 | 2018-04-11 | Multifunctional double-sleeve rotary drilling machine drill rod and construction method thereof |
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| CN116770806B (en) * | 2023-08-22 | 2023-11-14 | 广州市泰基工程技术有限公司 | Soft foundation treatment reinforcing apparatus of compound foundation |
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| CN202039771U (en) * | 2011-03-31 | 2011-11-16 | 威海建设集团股份有限公司 | Long-spiral grouting and guncreting multifunctional drilling tool |
| CN104762972A (en) * | 2015-04-14 | 2015-07-08 | 中国矿业大学 | Sectioned grouting pipe and construction method thereof for soft soil stratum reinforcement |
| CN105568962A (en) * | 2015-12-16 | 2016-05-11 | 重庆广播电视大学 | Novel self-feeding type porous grouting pile and grouting construction method thereof |
| CN205777535U (en) * | 2016-05-17 | 2016-12-07 | 中国水利水电第五工程局有限公司 | A kind of Grouting Pipe |
| CN208106342U (en) * | 2018-04-11 | 2018-11-16 | 沈阳建筑大学 | A kind of multi-functional double sleeve slewing drilling machine drilling rods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070286687A1 (en) * | 2006-06-12 | 2007-12-13 | Cesare Melegari | Method and equipment for constructing micropiles in soil |
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2018
- 2018-04-11 CN CN201810318900.9A patent/CN108487869B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202039771U (en) * | 2011-03-31 | 2011-11-16 | 威海建设集团股份有限公司 | Long-spiral grouting and guncreting multifunctional drilling tool |
| CN104762972A (en) * | 2015-04-14 | 2015-07-08 | 中国矿业大学 | Sectioned grouting pipe and construction method thereof for soft soil stratum reinforcement |
| CN105568962A (en) * | 2015-12-16 | 2016-05-11 | 重庆广播电视大学 | Novel self-feeding type porous grouting pile and grouting construction method thereof |
| CN205777535U (en) * | 2016-05-17 | 2016-12-07 | 中国水利水电第五工程局有限公司 | A kind of Grouting Pipe |
| CN208106342U (en) * | 2018-04-11 | 2018-11-16 | 沈阳建筑大学 | A kind of multi-functional double sleeve slewing drilling machine drilling rods |
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| CN108487869A (en) | 2018-09-04 |
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