CN111455982A - Static pressure hole-leading pile sinking construction method for monitoring ultra-thick pebble sand layer by laser - Google Patents
Static pressure hole-leading pile sinking construction method for monitoring ultra-thick pebble sand layer by laser Download PDFInfo
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- 230000003068 static effect Effects 0.000 title claims abstract description 81
- 238000010276 construction Methods 0.000 title claims abstract description 48
- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 239000004576 sand Substances 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 52
- 230000008569 process Effects 0.000 claims abstract description 35
- 238000005553 drilling Methods 0.000 claims abstract description 30
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 22
- 239000002689 soil Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000013519 translation Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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Abstract
The invention discloses a static pressure hole-leading pile-sinking construction method for monitoring an ultra-thick gravel layer by laser, which relates to the technical field of gravel layer construction and comprises the following steps: placing the pile driver in place; pile sinking is carried out; contacting the layer of pebble sand; cleaning slurry and mortar and then leading holes; starting laser monitoring construction; positioning a drilling machine; carrying out positioning measurement; performing high-pressure rotary spraying drilling; positioning a pilot hole pile position; carrying out drill lifting; carrying out static pressure pile pipe hole leading; the construction method is characterized in that static pressure pile sinking is carried out, laser monitoring construction is started, the perpendicularity of a guide hole directly determines the perpendicularity of a pile body, and plays an important role in pile forming quality, so that in the guide hole process, two photoelectric laser plumbers are used for forming an angle of 90 degrees, are aligned to the axis of a guide hole drill rod, and the perpendicularity in the direction of X, Y is monitored. The method for pile sinking by static pressure leading hole of the laser monitoring super-thick gravel layer solves the restriction of various factors such as power consumption, convenient movement of a machine body and the like; the foundation treatment is seriously influenced, and the pile sinking technology of special gravel layers is difficult.
Description
Technical Field
The invention relates to the technical field of gravel layer construction, in particular to a method for pile sinking through static pressure leading holes of an ultra-thick gravel layer by laser monitoring.
Background
Piling machinery can be divided into four types of impact type, vibration type, static pressure type and hole-forming and pouring type according to the working principle, the piling machinery is used for completing the operation of the precast pile to penetrate into the soil layer, the pile operation processes including driving, sinking, pressing in, pulling out or pouring pile hole forming and the like are widely applied to bridges and buildings, the construction of precast piles in foundation construction of wharfs, harbors and the like is carried out, along with the development of piling machinery, a pile hammer is developed from the traditional construction methods of a drop hammer, a steam hammer, a diesel hammer and a vibration hammer to a static pressure type pile sinking construction method which is widely used at present, the hydraulic static pile sinking construction method is widely used for soft soil foundation construction due to high pile sinking efficiency, low noise, small vibration and no oil smoke pollution, and the hydraulic pile sinking construction method completely replaces the diesel pile hammer construction method in Japan, Korea, hong Kong, Singapore and other areas in Europe and America countries and Asia.
Along with the continuous development of the building industry in China, various building types are continuously emerged, super-large and super-deep projects are more and more, and the static pile has the advantages of low noise, low manufacturing cost, easy quality guarantee, high construction speed and the like, so that the static pile is designed and widely applied; the high-pressure jet grouting machine is mainly applied to foundation treatment, curtain water stop construction and the like, the existing hole guiding equipment is mostly constructed by a dry operation method of a long-spiral drilling machine, but the technology and the equipment are limited by various factors such as the working depth, the soil discharge amount is large, the underground water level, the power consumption, the movement of a machine body is convenient and the like; the foundation treatment is seriously influenced, the pile sinking technology of a special gravel layer is difficult and easy to misplace, for example, the gravel layer is super-thick and a hard shell is difficult to penetrate in construction, and therefore a laser monitoring super-thick gravel layer static pressure leading hole pile sinking construction method is provided.
Disclosure of Invention
The invention aims to make up the defects of the prior art, and provides a laser monitoring ultra-thick gravel layer static pressure leading hole pile sinking construction method, which has the advantages of saving energy, avoiding dislocation, solving the restriction of a plurality of factors such as power consumption, convenient movement of a machine body and the like due to the difficult pile sinking technology of a special gravel layer; the foundation treatment is seriously influenced, and the problem that the pile sinking technology of the special gravel layer is difficult and easy to misplace is brought.
In order to solve the technical problems, the invention provides the following technical scheme: a static pressure hole-leading pile-sinking construction method for monitoring an ultra-thick pebble sand layer by laser comprises the following steps: placing the pile driver in place; pile sinking is carried out; contacting the layer of pebble sand; cleaning slurry and mortar and then leading holes; starting laser monitoring construction; positioning a drilling machine; carrying out positioning measurement; performing high-pressure rotary spraying drilling; positioning a pilot hole pile position; carrying out drill lifting; carrying out static pressure pile pipe hole leading; and (5) performing static pressure pile sinking.
Furthermore, the laser monitoring construction is started, the perpendicularity of the guide hole directly determines the perpendicularity of the pile body, and plays an important role in pile forming quality, so that in the guide hole process, two photoelectric laser plumbers are used for forming an angle of 90 degrees, the two photoelectric laser plumbers are aligned to the axis of a guide hole drill rod, the perpendicularity in the direction of X, Y is monitored, in the construction process, deviation is corrected at any time according to the monitoring condition, and the deviation is guaranteed to be controlled to be 0.2%.
Furthermore, the drilling machine is put in place, the spiral drilling machine drills holes in advance, then the tubular pile is subjected to static pressure on the hole site, the depth of the tubular pile reaches the design requirement, the soil squeezing effect can be obviously improved by adopting a pre-drilling hole sinking method, a long spiral drill bit is adopted for drilling a pilot hole, and the verticality is controlled to be 0.2%; .
Further, the high-pressure spraying drill is used for high-pressure spraying, the high-pressure gas-liquid mixing pipe also comprises a high-pressure gas-liquid mixing joint and a steel jet pipe which are respectively connected with the high-pressure airflow pipe and the high-pressure liquid flow pipe, a port of the high-pressure gas-liquid mixing joint for outputting high-pressure gas and liquid is connected with the steel jet pipe, the steel jet pipe is put into a pile pipe of the prestressed pipe pile, so that the high-pressure gas and the high-pressure liquid are mixed through the high-pressure gas-liquid mixing joint, then high-pressure gas and liquid are discharged from the pile bottom through the steel jet pipe and extend into the steel pipe, like this, guaranteed that the steel efflux pipe is vertical stretch into the stake intraductal downwards, prevented that the steel efflux pipe is crooked, made the high-pressure gas-liquid pressure from the ejection and reached the biggest, avoided the pipeline crooked to cause the breakage of pipeline, simultaneously, the follow-up sandy soil of carrying more convenient to returns to arrange to ground, can not cause the jam.
Furthermore, the positioning and hole guiding pile position is firstly subjected to a 0.5MPa water injection test for checking whether a nozzle is smooth and whether the pressure is normal, construction is carried out according to a conventional construction sequence, and a head return path is avoided as far as possible so as to avoid sinking of the static pile machine after the foundation is re-pressed; and (3) paying off each pile twice, positioning a pile foundation, placing the pile position before the first high-pressure rotary spraying, placing the pile position before the second high-pressure rotary spraying is finished and the pressing of the static pressure machine is carried out, so that the pile positions cannot be placed in batches, and the extrusion displacement of a pile body in the walking of the static pressure machine is avoided.
Further, hole guiding is carried out on the static pressure pile pipe, a hole guiding device is arranged on the static pressure pile machine and comprises a hole guiding frame, a power head, a propulsion system, a drill frame and a drill rod, the hole guiding frame is divided into a lower hole guiding frame and an upper hole guiding frame, the lower hole guiding frame is installed on the static pressure pile machine, the bottom of the upper hole guiding frame is slidably installed at the top of the lower hole guiding frame, a translation oil cylinder is installed between the upper hole guiding frame and the lower hole guiding frame, the drill frame is installed on the upper hole guiding frame, the power head is installed on the drill frame through the propulsion system to move downwards and upwards to achieve drilling and withdrawing operations, and the drill rod is connected with the power head.
Further, during the drill lifting process of the high-pressure jet drilling machine, the pressure of a pressure pump is reduced, the water spraying amount is reduced, a drill rod is disassembled, the drill rod is stacked on a drill rod stacking frame at the edge of the drilling machine, a grouting guide pipe is required to be pre-embedded in a hollow inner cavity of a precast pile before static pressure pile sinking, the grouting guide pipe can be a steel pipe or a pressure-resistant PVC pipe, the pile is hung in a static pressure pile machine after the static pressure pile machine is in place, a hydraulic chuck is started to clamp a pile body and align the pile body to the center of a pile position, pile pressing is started, the pile is repeatedly sunk by one pile pressing stroke every time, the pile sinking process of a first section of pile is completed, then the pile is welded, and the pile sinking processes of a second section, a third section and the like are repeated, so that the construction process of one pile is completed.
Further, hole guiding is carried out on the static pressure pile pipe, the high-pressure jet grouting drilling machine is moved away after drilling is completed, static pressure equipment is adjusted to carry out pile pressing, pile bottom elevation is taken as the standard during pile sinking, the static pressure pile machine is required to be put in place within 1.5h, then the pile is lifted by a crane and is sent into a clamping hole of a clamp holder of the pile machine, a pile tip is aligned with the pile position, then the pile machine is leveled, the pile body is made to be vertical, the verticality deviation of the pile body is controlled to be less than or equal to 0.5%, the axle center of the pile body is guaranteed to be pressed, the alignment deviation of the pile tip is less than or equal to 20.
Further, before static pressure pile sinking, a grouting guide pipe needs to be embedded in a hollow inner cavity of a precast pile, the grouting guide pipe can be a steel pipe or a pressure-resistant PVC pipe, the pile is hung in a static pile press after the static pile press is in place, a hydraulic chuck is started to clamp a pile body and align the pile body to the center of a pile position, straightening is carried out, pile pressing is started, pile sinking height is one pile pressing stroke each time, pile sinking process of a first section of pile is completed repeatedly, then welding is used for connecting the pile, pile sinking process of a second section, a third section and the like is repeated, accordingly, construction process of one pile is completed, perpendicularity of the pile cannot be adjusted and corrected at will, large bending moment secondary to the pile body is avoided, and pile sinking construction cannot be stopped except for mechanical fault in the process that the static pile penetrates through a hard soil layer or enters a bearing stratum.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-1, the present invention provides a technical solution: a static pressure hole-leading pile-sinking construction method for monitoring an ultra-thick pebble sand layer by laser comprises the following steps: s1, placing the pile driver in position; s2, pile sinking is carried out; s3 contacting the layer of ovoid sand; s4 cleaning the slurry and the mortar and then guiding the holes; s5 starting laser monitoring construction, the perpendicularity of the pilot hole directly determines the perpendicularity of the pile body, and plays an important role in pile forming quality, so that two photoelectric laser plumbers are used for forming an angle of 90 degrees in the pilot hole process, the two photoelectric laser plumbers are aligned to the axis of the pilot hole drill rod, the perpendicularity in the X, Y direction is monitored, in the construction process, deviation is corrected at any time according to the monitoring condition, and the deviation is controlled to be 0.2%.
S6, positioning a drilling machine, pre-drilling by a spiral drilling machine, then performing static pressure on the tubular pile at a hole position to enable the tubular pile to reach the depth required by the design, adopting a pre-drilling pile sinking method to obviously improve the soil squeezing effect, adopting a long spiral drill bit to drill a pilot hole, controlling the verticality to be 0.2 percent S7, and performing positioning measurement; s8, carrying out high-pressure rotary spraying drill, wherein the high-pressure gas-liquid mixing pipe further comprises a high-pressure gas-liquid mixing joint and a steel jet pipe which are respectively connected with the high-pressure gas flow pipe and the high-pressure liquid flow pipe, a port of the high-pressure gas-liquid mixing joint for outputting high-pressure gas and liquid is connected with the steel jet pipe, and the steel jet pipe is placed into the pile pipe of the prestressed pipe pile.
S9, positioning and guiding the hole pile position, firstly, carrying out 0.5MPa water injection test to check whether the nozzle is smooth and the pressure is normal, constructing according to the conventional construction sequence, and avoiding the head return as far as possible to avoid sinking of the static pressure pile machine after the foundation is re-pressed; each pile is payed off twice, pile foundation positioning is carried out, the pile position is placed before the first high-pressure rotary spraying, the pile position is placed before the static pressure machine applies pressure after the rotary spraying is finished for the second time, the pile position cannot be placed in batches, and the pile body is prevented from being extruded and displaced during the walking of the static pressure machine; s10, in the process of lifting the drill by the high-pressure jet grouting drill, the pressure of a pressure pump is reduced, the water spray amount is reduced, a drill rod is disassembled, a grouting guide pipe needs to be pre-embedded in a hollow inner cavity of a precast pile before static pressure pile sinking is carried out on a drill rod stacking rack beside the drill, the grouting guide pipe can be a steel pipe or a pressure-resistant PVC pipe, the pile is hung in a static pile pressing machine after the static pressure pile driver is in place, a hydraulic chuck is started to clamp a pile body and align the pile body to the center of a pile position, pile pressing is started, pile sinking is repeatedly carried out each time, the pile is sunk for one pile pressing stroke, the pile sinking process of a first section of pile is completed, then the pile is welded, and the pile sinking processes of a second section, a third section and the like are repeated, so that the construction process of one.
S11, carrying out static pressure pile pipe hole leading, removing after drilling by a high-pressure jet grouting drilling machine, adjusting a static pressure device to carry out pile pressing, taking the pile bottom elevation as the standard during pile sinking, completing the pile positioning of a static pressure pile machine within 1.5h, then hoisting the pile by a crane, sending the pile into a clamp hole of a pile machine clamp holder, aligning the pile tip to the pile position, then leveling the pile machine, making the pile body vertical, controlling the verticality deviation of the pile body to be less than or equal to 0.5%, ensuring that the axle center of the pile body is pressed, aligning the pile tip to the deviation to be less than or equal to 20mm, centering after no error, and carrying out pile pressing; s12, static pressure pile sinking is carried out, before static pressure pile sinking, a grouting guide pipe is required to be pre-buried in a hollow inner cavity of a precast pile, the grouting guide pipe can be a steel pipe or a pressure-resistant PVC pipe, the pile is hung in a static pressure pile machine after the static pressure pile machine is in place, a hydraulic chuck is started to clamp a pile body and align to the center of a pile position, pile pressing is started, pile sinking is carried out repeatedly with the pile height of one pile pressing stroke, the pile sinking process of a first section of pile is completed, then welding is used for connecting the pile, the pile sinking processes of a second section, a third section and the like are repeated, so that the construction process of one pile is completed, in the static pressure pile construction process, the perpendicularity of the pile cannot be adjusted and corrected arbitrarily, large secondary bending moment is prevented from being generated on the pile body, and in the process that the static pressure pile penetrates through a hard soil layer or enters a bearing layer, and pile sinking construction cannot be stopped except.
In the description of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. It is noted that, herein, relational terms such as "first," "second," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A static pressure hole-leading pile-sinking construction method for monitoring an ultra-thick pebble sand layer by laser is characterized by comprising the following steps of: s1, placing the pile driver in place;
s2, pile sinking is carried out;
s3, contacting the gravel layer;
s4, cleaning the slurry and the mortar and then guiding the holes;
s5, starting laser monitoring construction;
s6, positioning a drilling machine;
s7, positioning measurement is carried out;
s8, performing high-pressure rotary spray drilling;
s9, positioning the guide hole pile position;
s10, carrying out drill lifting;
s11, carrying out static pressure pile pipe hole guiding;
and S12, performing static pressure pile sinking.
2. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: the S5 starts laser monitoring construction, the perpendicularity of the pilot hole directly determines the perpendicularity of the pile body, and plays an important role in pile forming quality, so that in the pilot hole process, two photoelectric laser plumbers are used to form an angle of 90 degrees, and are aligned to the axis of the pilot hole drill rod, the perpendicularity in the X, Y direction is monitored, and in the construction process, deviation is corrected at any time according to the monitoring condition, and the deviation is guaranteed to be controlled at 0.2%.
3. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: s6, the drilling machine is put in place, the spiral drilling machine drills holes in advance, then the tubular pile is subjected to static pressure on the hole position, the depth of the tubular pile reaches the design requirement, the soil squeezing effect can be obviously improved by adopting a pre-drilling hole pile sinking method, a long spiral drill bit is adopted to drill a pilot hole, and the verticality is controlled to be 0.2%.
4. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: s8 carries out the high pressure and revolves the spraying and bores, high-pressure gas-liquid mixing pipe still including high-pressure gas-liquid mixing joint and the steel efflux pipe that is connected with high-pressure gas-flow pipe and high-pressure liquid flow pipe respectively, the port of the high-pressure gas-liquid mixing joint' S output high-pressure gas-liquid is connected with the steel efflux pipe, the steel efflux pipe is put into the stake of prestressing force tubular pile under, thus, mix high-pressure gas and high-pressure liquid through high-pressure gas-liquid mixing joint, and then discharge high-pressure gas-liquid from the pile bottom from the steel efflux pipe, it is the steel pipeline to stretch into the stake intraductal, thus, guaranteed that the steel efflux pipe is vertical to stretch into the stake intraductal downwards, prevented the steel efflux pipe crooked, make the high-pressure gas-liquid pressure from the ejection reach the biggest, avoid the pipeline crooked fracture that causes the pipeline, simultaneously, the follow-up.
5. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: the S9 is used for positioning the pile position of the pilot hole, firstly, a 0.5MPa water injection test is carried out to check whether the nozzle is unblocked and whether the pressure is normal, construction is carried out according to the conventional construction sequence, and the head return is avoided as far as possible, so that the static pile machine is prevented from sinking after the foundation is re-pressed; and (3) paying off each pile twice, positioning a pile foundation, placing the pile position before the first high-pressure rotary spraying, placing the pile position before the second high-pressure rotary spraying is finished and the pressing of the static pressure machine is carried out, so that the pile positions cannot be placed in batches, and the extrusion displacement of a pile body in the walking of the static pressure machine is avoided.
6. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: s11 hole leading of the static pressure pile tube is carried out, a hole leading device is arranged on the static pressure pile machine and comprises a hole leading frame, a power head, a propulsion system, a drill frame and a drill rod, the hole leading frame is divided into a lower hole leading frame and an upper hole leading frame, the lower hole leading frame is installed on the static pressure pile machine, the bottom of the upper hole leading frame is slidably installed at the top of the lower hole leading frame, a translation oil cylinder is installed between the upper hole leading frame and the lower hole leading frame, the drill frame is installed on the upper hole leading frame, the power head is installed on the drill frame through the propulsion system to move downwards and upwards so as to achieve drilling and withdrawing operations, and the drill rod is connected with the power head.
7. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: s10, lifting the drill, wherein in the process of lifting the drill by the high-pressure jet-grouting drilling machine, the pressure of a pressure pump is reduced, the water spray amount is reduced, a drill rod is disassembled, the drill rod is stacked on a drill rod stacking frame at the edge of the drilling machine, before static pressure pile sinking, a grouting guide pipe is required to be pre-embedded in a hollow inner cavity of a precast pile, the grouting guide pipe can be a steel pipe or a pressure-resistant PVC pipe, the pile is hung in a static pile pressing machine after the static pressure pile driving machine is in place, a hydraulic chuck is started to clamp a pile body and align the pile position center, pile pressing is started, the pile is repeatedly sunk by taking the pile pressing height as a pile pressing stroke every time, the pile sinking process of a first section of pile is completed, then the pile is welded, and the pile sinking processes of a second section, a third section and the like.
8. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: s11, carrying out static pressure pile pipe hole leading, removing after drilling by a high-pressure jet grouting drilling machine, adjusting a static pressure device to press a pile, taking the pile bottom elevation as the standard during pile sinking, completing the positioning of a static pressure pile machine within 1.5h, then hoisting the pile by a crane, sending the pile into a clamp hole of a pile machine clamp holder, aligning the pile tip to the pile position, then leveling the pile machine, making the pile body vertical, controlling the verticality deviation of the pile body to be less than or equal to 0.5%, ensuring that the axle center of the pile body is pressed, aligning the pile tip to the deviation to be less than or equal to 20mm, centering after no error, and carrying out pile pressing construction.
9. The method for performing static pressure pilot hole pile sinking by monitoring the ultra-thick pebble layer through laser according to claim 1, is characterized in that: s12, performing static pressure pile sinking, wherein before the static pressure pile sinking, a grouting guide pipe is required to be pre-embedded in a hollow inner cavity of a precast pile, the grouting guide pipe can be a steel pipe or a pressure-resistant PVC pipe, the pile is hung in a static pile press after the static pressure pile driver is in place, a hydraulic chuck is started to clamp a pile body and align the pile body to the center of a pile position, the pile pressing is started, the pile sinking height is one pile pressing stroke every time, the pile sinking process of a first section of pile is completed repeatedly, then the pile sinking process of a second section, a third section and the like is repeated, so that the construction process of one pile is completed, in the static pressure pile construction process, the perpendicularity of the pile cannot be adjusted and corrected arbitrarily, the pile body is prevented from generating large bending moment secondary, and the static pressure pile penetrates through a hard soil layer or enters a bearing layer, and pile sinking construction cannot be stopped except for mechanical faults.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926813A (en) * | 2020-08-19 | 2020-11-13 | 管云民 | Static pile machine with column pile positioning system and column pile construction method |
| CN112323778A (en) * | 2020-09-27 | 2021-02-05 | 鹤山市厚积工程机械有限公司 | Intelligent pile filling machine operation process |
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| CN112323778A (en) * | 2020-09-27 | 2021-02-05 | 鹤山市厚积工程机械有限公司 | Intelligent pile filling machine operation process |
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Application publication date: 20200728 |