CN108571286B - Pile foundation perforating device and method - Google Patents
Pile foundation perforating device and method Download PDFInfo
- Publication number
- CN108571286B CN108571286B CN201810427503.5A CN201810427503A CN108571286B CN 108571286 B CN108571286 B CN 108571286B CN 201810427503 A CN201810427503 A CN 201810427503A CN 108571286 B CN108571286 B CN 108571286B
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- perforating
- water
- pile foundation
- aluminum wire
- metal
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002689 soil Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000004880 explosion Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 230000001502 supplementing effect Effects 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 39
- 239000002184 metal Substances 0.000 abstract description 39
- 238000002309 gasification Methods 0.000 abstract description 4
- 239000011435 rock Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 9
- 239000011148 porous material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000011344 liquid material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- -1 and simultaneously Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten 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
- E21B1/00—Percussion drilling
- E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable
-
- 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
- E21B7/00—Special methods or apparatus for drilling
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The invention discloses a pile foundation perforating device and a method, wherein the device comprises the following components: a hole forming force generating mechanism; the device comprises a metal channel and/or a liquid channel, wherein the perforating force generating mechanism is used for utilizing a first impact force generated by metal electrified gasification explosion in the metal channel, a second impact force generated by liquid discharge in the liquid channel by a power supply, or a third impact force generated by metal electrified gasification explosion in the metal channel and liquid reaction in the metal channel as a perforating driving force, and the extruding and crushing of a soil layer to be perforated are caused by the driving force so as to achieve the perforating effect. The invention can be used for pore-forming and reaming of pile foundation, can improve the working efficiency of pore-forming of cast-in-place pile, has simple structure, convenient operation, low energy consumption, safety, reliability and no pollution, and meanwhile, the impact force can be flexibly adjusted, thereby being applicable to pore-forming and reaming of different soils, especially in gravel layers, hard soil layers, hard rock layers and soil layers containing boulders.
Description
Technical Field
The invention belongs to the field of pile foundation construction, and particularly relates to a pile foundation perforating device and method.
Background
The cast-in-place pile is a pile-forming process by directly perforating on the designed pile position, placing a reinforcement cage in the hole after perforating, and then pouring concrete. Common piling methods include impact drilling and manual hole digging. The impact hole forming usually utilizes an impact drilling machine or a winch to improve an impact drill bit with a drill blade and larger mass, the rock stratum is cut or the soil layer is extruded by the impact force of free falling, then a special slag dragging tool is adopted to draw out soil for hole forming, the equipment is simple, the operation is convenient, but the hole forming speed is low, the construction period is long, the drill bit is easy to wear, accidents such as hole inclination, drill clamping and drill falling are easy to occur, the maintenance cost is high, and the construction progress is difficult to ensure. The manual hole digging is directly carried out by adopting manpower to dig and form holes, the cost is low, but the hole forming depth is limited, the safety measures are improper or incomplete, the casualties are easy to cause, and the soil layer which is lack of oxygen or toxic gas in the advanced underground water level holes is not suitable for being adopted under the condition of complex geology.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a pile foundation perforating device and a pile foundation perforating method, which solve the technical problems of low perforating speed, long construction period time, limited perforating depth, difficult guarantee of construction progress and the like of the existing pile forming method.
In order to achieve the above object, according to one aspect of the present invention, there is provided a pile foundation boring device, comprising: a hole forming force generating mechanism;
the perforating force generating mechanism comprises a metal channel and/or a liquid channel, and is used for utilizing a first impact force generated by metal electrified gasification explosion in the metal channel, a second impact force generated by electric discharge of a power supply to liquid in the liquid channel, or a third impact force generated by metal electrified gasification explosion in the metal channel and liquid reaction between the metal and the liquid in the liquid channel as a perforating driving force, so that extrusion and crushing of a soil layer to be perforated are caused by the driving force, and the perforating effect is achieved.
Preferably, the pile foundation perforating device further comprises a wire feeding mechanism, wherein the wire feeding mechanism is used for automatically supplementing metal after single perforating is finished, and continuous automatic perforating operation is facilitated.
Preferably, the pile foundation perforating device further comprises a liquid supplementing mechanism, wherein the liquid supplementing mechanism is used for automatically supplementing liquid according to the consumption condition of the liquid after the perforating operation is finished.
Preferably, the opening force generating mechanism comprises at least one metal channel and/or at least one liquid channel.
According to another aspect of the present invention, there is provided a pile foundation perforating method comprising:
Pulse current is introduced into the metal in the metal channel so as to enable the metal to be gasified at a high temperature, and explosion occurs to generate a first impact force; or discharging the liquid in the liquid channel to generate a second impact force; or pulse current is introduced into the metal in the metal channel so as to enable the metal to be gasified at a high temperature to explode, and meanwhile, the metal and liquid in the liquid channel are subjected to chemical reaction to generate a third impact force;
And taking the first impact force, the second impact force or the third impact force as a driving force for opening, and causing extrusion and crushing of a soil layer to be opened by the driving force so as to achieve an opening effect.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) The invention uses the impact force generated by metal electric explosion, liquid discharge or metal electric explosion and metal and liquid chemical reaction as the acting force of pile foundation pore-forming and pore-expanding, and has the advantages of simple structure, simple operation, portable equipment, high flexibility, low cost, low manufacturing cost and easy construction and field operation, and is not limited by construction sites and working surfaces. The reaming process can be completed in a single time, the reaming forming time is short, the effect is reliable, the working efficiency is high, and the construction time is saved. The pore-forming and reaming process only uses electric energy, is clean and pollution-free, is safe and reliable, has few moving and control parts, is convenient to maintain, has long service life and strong geological adaptability, can adapt to pore-forming and reaming works of different soils, and is suitable for different pile types and pile sizes. The soil layer is particularly suitable for clay layers, hard soil layers, gravel layers and other soil layers containing rocks and soil layers containing underground water.
(2) The invention can flexibly regulate and control the acting force of single pore forming and reaming by regulating the current of metal, the total energy of single discharge and the dosage of metal, thereby regulating the geometric parameters such as the depth and radius of pore forming, the range of reaming and the like, ensuring the pile body quality and the single pile bearing capacity, ensuring the single discharge time to be extremely short, realizing the continuous pore forming operation with high single pore forming depth and high speed, and being beneficial to shortening the construction period.
Drawings
Fig. 1 is a schematic structural view of a bored pile hole-forming apparatus according to an embodiment of the present invention;
Fig. 2 is a schematic structural view of a pile foundation reaming device according to an embodiment of the present invention;
FIG. 3 is a schematic view of a bored pile according to an embodiment of the present invention after hole forming;
Fig. 4 is a schematic diagram of a pile foundation after reaming according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention provides a pile foundation perforating device and method, which can be used for perforating and reaming a pile foundation, can improve the working efficiency of perforating a cast-in-place pile, has the advantages of simple structure, convenient operation, low energy consumption, safety, reliability and no pollution, and can flexibly adjust impact force, thereby being applicable to perforating and reaming different soils, in particular to a gravel layer, a hard soil layer, a hard rock layer and a soil layer containing groundwater which contain boulders.
The terms first, second, third and the like in the description and in the claims, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
In one aspect of the present invention, there is provided a pile foundation perforating apparatus comprising: a hole forming force generating mechanism;
The perforating force generating mechanism comprises a metal channel and/or a liquid channel, and is used for utilizing a first impact force generated by metal in the metal channel through electrifying and gasifying explosion, a second impact force generated by liquid discharge in the liquid channel through a power supply, or a third impact force generated by metal in the metal channel through electrifying and gasifying explosion and liquid reaction in the metal and liquid channel as a driving force for perforating, and the driving force is used for causing extrusion and crushing of a soil layer to be perforated so as to achieve the perforating effect.
In the embodiment of the invention, after the metal is gasified, the contact surface between the metal and the liquid is greatly increased, so that the impact force generated by the chemical reaction between the metal and the liquid is improved.
In the embodiment of the present invention, the metal material may be any metal material such as aluminum, iron or tungsten, and the liquid material may be any liquid material such as water, and specifically, what metal material and what liquid material are used for chemical reaction, which is not limited in the embodiment of the present invention.
In embodiments of the present invention, the opening force generating mechanism includes at least one metal channel and/or at least one liquid channel, and the specific number of uses of the embodiments of the present invention is not limited to uniqueness.
In the embodiment of the present invention, the metal may be wire-shaped, ribbon-shaped, foil-shaped, or the like, or wound into a single coil shape, and the specific shape adopted in the embodiment of the present invention is not limited uniquely.
The coil can be an integral single coil or a plurality of small coils, is convenient to expand capacity and flexible to assemble, and the mode is not limited uniquely.
Wherein, through adjusting the quantity of metal/liquid, the driving force of the open pore can be flexibly controlled, thereby achieving the best tamping effect and tamping quality.
As an alternative implementation mode, the pile foundation perforating device further comprises a wire feeding mechanism, wherein the wire feeding mechanism is used for automatically supplementing metal after single perforating is finished, and continuous automatic perforating operation is facilitated.
As an alternative embodiment, the pile foundation perforating device further comprises a liquid supplementing mechanism, wherein the liquid supplementing mechanism is used for automatically supplementing liquid according to the consumption condition of the liquid after the perforating operation is finished.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the overall structure of the bored pile hole-forming apparatus according to the embodiment of the present invention includes: the high-voltage electrode 1, the grounding electrode 2, the aluminum wire 3, the soil layer 4, the water inlet pipe 5 and the water outlet pipe 6.
The aluminum wire 3 is arranged on the surface of the soil layer 4, and two ends of the aluminum wire are respectively connected with the high-voltage electrode 1 and the grounding electrode 2. The space between the high voltage electrode 1 and the ground electrode 2 is filled with water.
The pore-forming method comprises the following steps:
(1) The aluminum wire 3 is closely attached to the soil layer 4 and is arranged on the surface of the soil layer 4 in parallel along a strip shape, and two ends of the aluminum wire 3 are respectively connected with the high-voltage electrode 1 and the grounding electrode 3;
(2) Introducing water between the high-voltage electrode 1 and the grounding electrode 2 through the water inlet pipe 5, so that the space between the high-voltage electrode 1 and the grounding electrode 2 is filled with water, and meanwhile, the aluminum wire 3 is immersed in the water;
(3) The high-voltage electrode 1 and the grounding electrode 2 are discharged, so that high pulse current flows in the aluminum wire 3, energy is accumulated in the aluminum wire rapidly due to the Joule heating effect, the aluminum wire is gasified at a high temperature and explodes to generate huge shock waves, meanwhile, the contact surface between the gasified aluminum wire and water is greatly increased, the aluminum wire and the water are subjected to chemical reaction to generate hydrogen, and the two forces are superposed to cause extrusion and crushing of a soil layer;
(4) The soil residue enters the water outlet pipe 6 along with water and is discharged out of the pile hole, and the appearance of the hole formed by single operation is shown as figure 3 (7 is the original soil layer position, 8 is the soil layer position after hole forming);
(5) After the single discharge is completed, refilling the aluminum wire;
(6) Repeating the steps (2) - (5) until the holes are formed to the designated depth.
In an alternative embodiment, the use amount and arrangement mode of the aluminum wires can be adjusted according to the radius and the depth of the single hole forming, so that the range and the depth of the next hole forming can be flexibly adjusted and controlled.
In an alternative embodiment, a wire feeder may be added to automatically replenish the consumed aluminum wire.
Example 2
As shown in fig. 2, the reaming device according to the embodiment of the present invention has a general structure including: coil 3, soil layer 4.
The reaming method comprises the following steps:
(1) The coil 3 is placed in a water tank and is closely attached to the soil layer 4, and the water tank is filled with water;
(2) The coil 3 is electrified, because the coil 3 is wound by adopting an aluminum material, the Joule heating effect is remarkable under a large current, energy is accumulated in the coil, the aluminum wire is gasified at a high temperature, and explosion generates huge shock waves, meanwhile, after the aluminum is gasified, the contact surface between the aluminum and water is greatly increased, the aluminum and the water are subjected to chemical reaction, hydrogen is generated, huge energy is released, and the impact force is further increased. The superposition of the two forces causes the extrusion and the crushing of the soil layer, so that the reaming effect is achieved, and the profile of the reamed pile hole is shown in fig. 4 (7 is the original soil layer position, and 8 is the reamed soil layer position).
(3) And (5) if the single reaming does not meet the specified requirement, repeating the steps (1) - (2) until the reaming is completed.
In an alternative embodiment, the number of turns, the size and the shape of the coil (the amount of the wound aluminum wire) can be adjusted according to the parameter requirements of reaming, so that the whole reaming process can be completed only by setting single discharge.
In an alternative embodiment, a wire feeding mechanism and a water supplementing mechanism can be additionally arranged to automatically supplement consumed aluminum wires and water, and simultaneously, soil and slag are automatically discharged out of the hole along with the water.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (3)
1. A pile foundation perforating method, characterized in that a pile foundation perforating device is adopted, and the pile foundation perforating device comprises: the high-voltage electrode (1), the grounding electrode (2), the aluminum wire (3), the water inlet pipe (5) and the water outlet pipe (6); the aluminum wire (3) is arranged on the surface of the soil layer (4), and two ends of the aluminum wire are respectively connected with the high-voltage electrode (1) and the grounding electrode (2); the space between the high-voltage electrode (1) and the grounding electrode (2) is filled with water; the perforating method comprises the following steps:
s1: the aluminum wires (3) are closely attached to the soil layer (4) and are arranged on the surface of the soil layer (4) in parallel along strips, and two ends of the aluminum wires (3) are respectively connected with the high-voltage electrode (1) and the grounding electrode (2);
S2: introducing water between the high-voltage electrode (1) and the grounding electrode (2) through the water inlet pipe (5), so that the space between the high-voltage electrode (1) and the grounding electrode (2) is filled with water, and meanwhile, the aluminum wire (3) is immersed in the water;
s3: the high-voltage electrode (1) and the grounding electrode (2) are discharged, so that high pulse current flows in the aluminum wire (3), energy is accumulated in the aluminum wire (3) rapidly due to the Joule heating effect, the aluminum wire (3) is gasified at high temperature, a large impact wave is generated by explosion to form a first impact force, meanwhile, a second impact force is generated by water discharge, in addition, the contact surface between the aluminum wire (3) and water is greatly increased after the aluminum wire (3) is gasified, the aluminum wire (3) and the water are subjected to chemical reaction to generate hydrogen to form a third impact force, and the three impact forces are superposed to cause extrusion and crushing of a soil layer;
s4: the soil residue enters a water outlet pipe (6) along with water and is discharged out of the pile hole;
S5: after the single hole opening is finished, the aluminum wire (3) is refilled;
S6: repeating the steps S2-S5 until the holes are formed to the designated depth.
2. Pile foundation perforating method as claimed in claim 1, characterized in that the pile foundation perforating device further comprises a wire feeding mechanism for automatically supplementing the aluminium wire (3) after the end of a single perforating operation, facilitating the continuous automatic execution of the perforating operation.
3. The pile foundation perforating method of claim 1 or 2, characterized in that the pile foundation perforating device further comprises a liquid supplementing mechanism for automatically supplementing water according to the consumption of water after the perforating operation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810427503.5A CN108571286B (en) | 2018-05-07 | 2018-05-07 | Pile foundation perforating device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810427503.5A CN108571286B (en) | 2018-05-07 | 2018-05-07 | Pile foundation perforating device and method |
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| Publication Number | Publication Date |
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| CN108571286A CN108571286A (en) | 2018-09-25 |
| CN108571286B true CN108571286B (en) | 2024-04-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377094B (en) * | 2020-11-04 | 2023-07-21 | 北京三一智造科技有限公司 | Pile foundation construction method |
| CN112360337B (en) * | 2020-11-04 | 2023-06-20 | 北京三一智造科技有限公司 | Pile foundation construction method |
| CN112605519B (en) * | 2020-12-18 | 2024-03-05 | 湖北科技学院 | Explosion welding method based on aluminum and water reaction |
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| CN108571286A (en) | 2018-09-25 |
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