CN113123778A - Device and method for monitoring pile forming diameter of high-pressure jet grouting pile in real time - Google Patents
Device and method for monitoring pile forming diameter of high-pressure jet grouting pile in real time Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 65
- 238000005553 drilling Methods 0.000 claims abstract description 38
- 239000007921 spray Substances 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims description 60
- 239000012530 fluid Substances 0.000 claims description 36
- 239000002002 slurry Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 9
- 238000012806 monitoring device Methods 0.000 description 7
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- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011440 grout Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005288 electromagnetic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 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
- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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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
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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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 provides a device and a method for monitoring the pile forming diameter of a high-pressure jet grouting pile in real time, wherein the device is arranged on a drilling machine, the drilling machine comprises a drilling spray rod, a nozzle arranged on the drilling spray rod and a driving mechanism for driving the drilling spray rod to rotate, the device for monitoring the pile forming diameter of the high-pressure jet grouting pile in real time comprises a first protection box, an ultrasonic probe and a processor, the first protection box is arranged on the drilling spray rod and positioned below the nozzle, the ultrasonic probe is arranged in the first protection box and connected with a wireless signal transmitting device, the processor is connected with a wireless signal receiving device, and the wireless signal transmitting device is connected with the wireless signal receiving device. The invention can monitor the pile diameter in real time in the pile-forming construction process of the high-pressure jet grouting pile, not only can avoid potential safety hazards caused by insufficient pile diameter of the high-pressure jet grouting pile, but also can avoid material waste caused by overlarge pile diameter of the high-pressure jet grouting pile.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to a device and a method for monitoring the pile forming diameter of a high-pressure jet grouting pile in real time.
Background
The high-pressure jet grouting pile technology is mainly used for foundation reinforcement and water-stop curtain formation in engineering, has the characteristics of less construction land occupation, small vibration, lower noise, relatively lower cost and the like, and is widely applied. The high-pressure jet grouting pile is characterized in that a drilling machine is used for drilling a drilling boom with a special nozzle to a soil layer with a designed depth, slurry is sprayed out of the nozzle under the pressure of 20-40 MPa to form a jet flow to impact and damage an original soil layer, damaged soil particles and the slurry are stirred and mixed to form rearranged mixed fluid, and a solidified body is formed in soil after solidification. The construction process comprises a single-pipe method (only cement slurry is sprayed), a double-pipe method (cement slurry and air are sprayed) and a three-pipe method (cement slurry and air and water are sprayed), and the three processes are selected comprehensively according to the diameter of the rotary-spraying rotary pile and the stratum condition.
The pile-forming diameter is one of the important control indexes of high-pressure jet grouting pile construction, but the action mechanism of cutting soil by high-pressure fluid is complex, and the soil property is variable, so that the mechanism research is difficult, so that at present, no mature theory exists for explaining the control mechanism of the pile-forming diameter, the construction parameter control is carried out only by the construction experience in the construction, the uncertainty is increased, and the phenomena of pile breaking, necking and the like are often caused, so the pile-forming quality control of the high-pressure jet grouting pile is always a construction difficulty, and the effective monitoring method of the pile-forming diameter parameter is lacked in the parameter acquisition in the construction process at present, so that a waterproof curtain cannot be completely occluded or the bearing capacity of a reinforced pile cannot meet the requirement.
Disclosure of Invention
The invention aims to provide a pile-forming diameter real-time monitoring device for a high-pressure jet grouting pile, which can monitor the pile-forming diameter in real time in the pile-forming construction process of the high-pressure jet grouting pile, can avoid potential safety hazards caused by insufficient pile diameter of the high-pressure jet grouting pile, and can also avoid material waste caused by overlarge pile diameter of the high-pressure jet grouting pile.
The invention is realized by the following technical scheme:
the utility model provides a high pressure jet grouting pile becomes stake diameter real-time supervision device, a set up on the rig, the rig is including boring the spray lance, the nozzle of setting on boring the spray lance carries out rotatory actuating mechanism with the drive brill spray lance, high pressure jet grouting pile becomes stake diameter real-time supervision device and includes first protection box, ultrasonic transducer and treater, first protection box sets up the below that just is located the nozzle on boring the spray lance, ultrasonic transducer sets up in first protection box, ultrasonic transducer is connected with wireless signal transmitting device, the treater is connected with wireless signal receiving device, wireless signal transmitting device is connected with wireless signal receiving device.
Further, bore the spray lance including the upper portion pipeline section that connects gradually, first connecting pipe section, the middle part pipeline section, second connecting pipe section and lower part pipeline section, first connecting pipe section and second connecting pipe section are the cavity setting, wireless signal receiving arrangement sets up in first connecting pipe section, first connecting hole has been seted up to the outer wall of second connecting pipe section, wireless signal transmitting device sets up in second connecting pipe section, first protection box sets up on second connecting pipe section, and its one side that is close to second connecting pipe section sets up the second connecting hole that corresponds with first connecting hole, ultrasonic transducer passes second connecting hole and first connecting hole and wireless signal transmitting device electricity through the wire in proper order and is connected.
Furthermore, the wireless signal transmitting device comprises a second protection box, an electromagnetic signal transmitting coil and a circuit amplification module, wherein the second protection box is arranged at the top end inside the second connecting pipe section, the electromagnetic signal transmitting coil is vertically arranged in the second protection box, and the circuit amplification module is arranged in the second protection box and is respectively and electrically connected with the electromagnetic signal transmitting coil and the ultrasonic probe through wires;
the wireless receiving device comprises a third protection box, an electromagnetic signal receiving coil and an output signal interface, the third protection box is arranged in the first connecting pipe section, the electromagnetic signal receiving coil is vertically arranged in the third protection box, the output signal interface is arranged on the outer side of the first connecting pipe section and is electrically connected with the electromagnetic signal receiving coil through a wire, and the processor is electrically connected with the output signal interface.
Further, the third protection box is connected with the first connecting pipe through a plurality of steel wires.
Furthermore, the electromagnetic signal transmitting coil is connected with the second protection box through a plurality of first connecting rods, and the electromagnetic signal receiving coil is connected with the third protection box through a plurality of second connecting rods.
Furthermore, a steel sleeve is sleeved outside a lead connected between the output signal interface and the electromagnetic signal receiving coil, one end of the steel sleeve is connected with the third protection box, and the other end of the steel sleeve is connected with the first connecting pipe section.
Furthermore, the two ends of the ultrasonic probe are provided with third connecting rods, and the third connecting rods are connected with the first protection box through a plurality of elastic pieces.
Further, one side of the first protection box close to the drilling and spraying rod is a rubber ring.
Further, the processor includes a processing chip and a display coupled to the processing chip.
The invention also provides a pile-forming diameter real-time monitoring method of the high-pressure jet grouting pile, which comprises the following steps of:
drilling and sampling a target site, crushing soil samples of different stratums obtained by sampling, pouring the crushed soil samples into a cylinder, adding slurry into the cylinder according to a preset design proportion, and stirring to form a first mixed fluid, wherein the diameter of the cylinder is the same as the design diameter of a high-pressure jet grouting pile;
the ultrasonic probe is extended into the first mixed fluid for measurement, and whether the ultrasonic probe can receive the reflected wave is detected;
if so, determining the transmitting frequency of the current ultrasonic probe as the working transmitting frequency;
respectively crushing soil samples of different stratums obtained by sampling, respectively adding the crushed soil samples and slurry specified by preset design into different cylinders, and stirring to form second mixed fluid corresponding to each stratum;
for the second mixed fluid corresponding to each stratum, extending the ultrasonic probe into the second mixed fluid, and controlling the ultrasonic probe to emit working ultrasonic waves at a working emission frequency to obtain the propagation velocity of the working ultrasonic waves in each second mixed fluid;
in the process of drilling a hole under the drilling spray rod, the ultrasonic probe is controlled to emit working ultrasonic waves at a working emission frequency, the time difference between the working ultrasonic waves emitted by the ultrasonic probe and the reflected waves received by the ultrasonic probe is obtained in real time, the propagation speed of the working ultrasonic waves in the second mixed fluid corresponding to the target soil layer is obtained according to the current target soil layer where the ultrasonic probe is located, and the pile forming diameter of the high-pressure rotary jet grouting pile is obtained through real-time calculation.
Compared with the prior art, the invention has the beneficial effects that: the ultrasonic probe can detect the position of a solid interface and output a signal measured in real time to the processor through the wireless signal transmitting device and the wireless signal receiving device, and the processor calculates the pile forming diameter of the high-pressure jet grouting pile according to the received signal, so that the pile forming diameter of the high-pressure jet grouting pile is monitored in real time, potential safety hazards caused by insufficient pile diameter of the high-pressure jet grouting pile can be avoided, and material waste caused by overlarge pile diameter of the high-pressure jet grouting pile can be avoided; the method has wide applicability, can be suitable for a single-pipe method, a double-pipe method and a three-pipe method, ensures that the pile forming diameter of the high-pressure jet grouting pile meets the design requirement, and can effectively improve the construction quality of the high-pressure jet grouting pile.
Drawings
FIG. 1 is a schematic structural diagram of a pile-forming diameter real-time monitoring device of a high-pressure jet grouting pile of the invention;
FIG. 2 is a partial schematic view of a pile-forming diameter real-time monitoring device of the high-pressure jet grouting pile of the invention;
fig. 3 is another partial schematic view of the pile-forming diameter real-time monitoring device for the high-pressure jet grouting pile of the invention.
In the figure, 1-drilling machine, 11-drilling spray rod, 111-upper pipe section, 112-first connecting pipe section, 113-middle pipe section, 114-second connecting pipe section, 115-lower pipe section, 12-nozzle, 2-first protection box, 21-rubber ring, 3-ultrasonic probe, 4-wireless signal transmitting device, 41-second protection box, 42-electromagnetic signal transmitting coil, 43-circuit amplification module, 44-first connecting rod, 5-wireless signal receiving device, 51-third protection box, 52-electromagnetic signal receiving coil, 53-output signal interface, 54-steel wire, 55-second connecting rod, 56-steel sleeve, 6-third connecting rod, 7-elastic element and 8-processor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a real-time monitoring device for pile forming diameter of a high-pressure jet grouting pile of the present invention, fig. 2 is a partial schematic diagram of the real-time monitoring device for pile forming diameter of a high-pressure jet grouting pile of the present invention, and fig. 3 is another partial schematic diagram of the real-time monitoring device for pile forming diameter of a high-pressure jet grouting pile of the present invention.
The invention discloses a device for monitoring the pile forming diameter of a high-pressure jet grouting pile in real time, which is arranged on a drilling machine 1, wherein the drilling machine 1 comprises a drilling and spraying rod 11, a nozzle 12 arranged on the drilling and spraying rod 11 and a driving mechanism for driving the drilling and spraying rod 11 to rotate.
When the high-pressure jet grouting pile is constructed, the mixed fluid formed by mixing the slurry sprayed by the nozzle 12 and the soil body is formed within the pile forming diameter range, the current solid soil body is formed outside the pile forming diameter range, the ultrasonic wave emitted by the ultrasonic probe 3 can be reflected at a flow-solid interface between the mixed fluid and the solid soil body, and the ultrasonic probe 3 can generate a low-pressure signal after receiving the reflected wave. In one embodiment, the ultrasonic probe 3 is provided with third connecting rods 6 at both ends, and the third connecting rods 6 are connected with the first protective case 2 through a plurality of elastic members 7. Elastic component 7 can adopt the spring, and ultrasonic transducer 3's both ends are connected with first protection box 2 through third connecting rod 6 and a plurality of elastic component 7 respectively, can play absorbing effect, reduce and bore the influence of the vibrations that spray lance 11 rotated, descend and the promotion process produced to ultrasonic transducer 3, guarantee ultrasonic transducer 3's measurement accuracy and increase of service life. Meanwhile, in order to prevent muddy water from permeating into the first protection box 2, in one embodiment, a rubber ring 21 is arranged on one side of the first protection box 2 close to the drill and spray rod 11. The rubber ring 21 is connected with the drill and spray rod 11, so that the sealing of the first protection box 2 is ensured. Preferably, first protection box 2 passes through screw and nut demountable installation on drilling and spraying rod 11, realizes first protection box 2 and drilling and spraying rod 11's function of dismantling, is convenient for change ultrasonic transducer 3.
The ultrasonic probe 3 outputs the generated low-voltage signal to the processor 8 through the wireless signal transmitting device 4 and the wireless signal receiving device 5, and the processor 8 calculates the pile forming diameter of the high-pressure jet grouting pile in real time according to the received signal. In an embodiment, the drilling and spraying rod 11 includes an upper pipe section 111, a first connecting pipe section 112, a middle pipe section 113, a second connecting pipe section 114 and a lower pipe section 115 which are connected in sequence, the first connecting pipe section 112 and the second connecting pipe section 114 are both hollow, the wireless signal receiving device 5 is arranged in the first connecting pipe section 112, a first connecting hole is formed in the outer wall of the second connecting pipe section 114, the wireless signal transmitting device 4 is arranged in the second connecting pipe section 114, the first protection box 2 is arranged on the second connecting pipe section 114, a second connecting hole corresponding to the first connecting hole is formed in one side of the first protection box close to the second connecting pipe section 114, and the ultrasonic probe 3 sequentially penetrates through the second connecting hole and the first connecting hole to be electrically connected with the wireless signal transmitting device 4 through a conducting wire. This setting is convenient for install wireless signal transmitting device 4, wireless signal receiving arrangement 5 and first protection box 2 to ultrasonic transducer 3 is connected with wireless signal transmitting device 4 through the wire, guarantees signal transmission's reliability. Preferably, the first connecting pipe section 112 is connected to the upper pipe section 111 and the middle pipe section 113 by screw-fitting, respectively, and the second connecting pipe section 114 is connected to the middle pipe section 113 and the lower pipe section 115 by screw-fitting, respectively.
Specifically, in one embodiment, the wireless signal transmitting device 4 includes a second protection box 41, an electromagnetic signal transmitting coil 42 and a circuit amplifying module 43, the second protection box 41 is disposed at the top end inside the second connecting pipe section 114, the electromagnetic signal transmitting coil 42 is vertically disposed inside the second protection box 41, and the circuit amplifying module 43 is disposed inside the second protection box 41 and is electrically connected with the electromagnetic signal transmitting coil 42 and the ultrasonic probe 3 through conducting wires, respectively; the wireless receiving device comprises a third protection box 51, an electromagnetic signal receiving coil 52 and an output signal interface 53, wherein the third protection box 51 is arranged in the first connecting pipe section 112, the electromagnetic signal receiving coil 52 is vertically arranged in the third protection box 51, the output signal interface 53 is arranged outside the first connecting pipe section 112 and is electrically connected with the electromagnetic signal receiving coil 52 through a conducting wire, and the processor 8 is electrically connected with the output signal interface 53. The circuit amplification module 43 amplifies the low-voltage signal generated by the ultrasonic probe 3 into a high-voltage signal and transmits the high-voltage signal to the electromagnetic signal transmitting coil 42, and the electromagnetic signal transmitting coil 42 converts the high-voltage signal into a magnetic field which penetrates through the first connecting pipe section 112, the slurry in the drill and boom 11 and the second connecting pipe section 114 to reach the electromagnetic signal receiving coil 52. The electromagnetic effect is utilized to excite the magnetic field to serve as a signal carrier, slurry in the drilling and spraying rod 11 serves as a medium to transfer the magnetic field, loss in the geomagnetic propagation process can be effectively reduced, the correctness of signal transfer is guaranteed, and meanwhile the low-voltage signal is amplified into the high-voltage signal through the circuit amplification module 43, so that the electromagnetic signal transmitting coil 42 can generate the magnetic field with enough strength. Further, the first connector segment 112 and the second connector segment 114 may be made of materials that have little effect on the propagation of magnetic fields. In an embodiment, the electromagnetic signal transmitting coil 42 is connected with the second protective box 41 through a plurality of first connecting rods 44, so that the central axis of the electromagnetic signal transmitting coil 42 coincides with the central axis of the drill stem 11, the electromagnetic receiving device is connected with the third protective box 51 through a plurality of second connecting rods 55, the third protective box 51 is connected with the first connecting tubes through a plurality of steel wires 54, so that the central axis of the electromagnetic signal receiving coil 52 coincides with the central axis of the drill stem 11, thereby reducing the change of the receiving magnetic field caused by the position change, and effectively reducing the obstruction to slurry transmission while achieving the fixing effect.
The electromagnetic signal receiving coil 52 outputs the received magnetic field as an electrical signal, which is transmitted to the processor 8 through the output signal interface 53. The signal output of the electromagnetic signal receiving coil 52 is provided with an output signal interface 53 for facilitating connection to the processor 8. In one embodiment, a steel sleeve 56 is sleeved outside the lead connected between the output signal interface 53 and the electromagnetic signal receiving coil 52, one end of the steel sleeve 56 is connected with the third protection box 51, and the other end is connected with the first connecting pipe section 112. The steel sleeve 56 may serve to protect the lead. The processor 8 receives and processes the electric signal transmitted by the electromagnetic signal receiving coil 52 to obtain the time difference between the ultrasonic wave transmitted by the ultrasonic probe 3 and the received reflected wave, and the pile forming diameter of the high-pressure jet grouting pile can be obtained by multiplying the time difference by the corresponding propagation speed of the ultrasonic wave. In one embodiment, processor 8 includes a processing chip and a display coupled to the processing chip. The processing chip receives the electric signal transmitted by the electromagnetic signal receiving coil 52, processes and calculates the electric signal to obtain the pile forming diameter of the high-pressure jet grouting pile, and transmits the calculation result to the display for displaying, so that constructors can visually check the pile forming diameter of the high-pressure jet grouting pile, and the constructors can conveniently control the pile forming diameter of the high-pressure jet grouting pile.
The invention also provides a pile-forming diameter real-time monitoring method of the high-pressure jet grouting pile, which comprises the following steps of:
s1, drilling and sampling a target site, crushing soil samples of different stratums obtained by sampling, pouring the crushed soil samples into a cylinder, adding slurry into the cylinder according to a preset design proportion, and stirring to form a first mixed fluid, wherein the diameter of the cylinder is the same as the design diameter of the high-pressure jet grouting pile;
s2, extending the ultrasonic probe 3 into the first mixed fluid for measurement, and detecting whether the ultrasonic probe 3 can receive the reflected wave;
s3, if yes, determining the current transmitting frequency of the ultrasonic probe 3 as the working transmitting frequency;
s4, crushing the soil samples of different stratums obtained by sampling, adding the crushed soil samples and the slurries specified by a preset design into different cylinders, and stirring to form second mixed fluid corresponding to each stratum;
s5, for the second mixed fluid corresponding to each stratum, extending the ultrasonic probe 3 into the second mixed fluid, and controlling the ultrasonic probe 3 to emit working ultrasonic waves at a working emission frequency to obtain the propagation velocity of the working ultrasonic waves in each second mixed fluid;
s6, in the process of drilling a hole under the drilling spray rod 11, the ultrasonic probe 3 is controlled to emit working ultrasonic waves at the working emission frequency, the propagation speed of the working ultrasonic waves in the second mixed fluid corresponding to the target soil layer is obtained according to the time difference between the working ultrasonic waves emitted by the ultrasonic probe 3 and the reflected waves received by the ultrasonic probe 3 and the current target soil layer where the ultrasonic probe 3 is located, and the pile forming diameter of the high-pressure rotary spray pile is obtained through real-time calculation.
The method comprises the steps of drilling and sampling a target site to be constructed, determining the geological condition of each soil layer into which a high-pressure jet grouting pile needs to be inserted during construction in the target site, wherein for example, five soil layers, namely a soil layer A, a soil layer B, a soil layer C, a soil layer D and a soil layer E, need to be inserted during construction of the high-pressure jet grouting pile, and simultaneously obtaining a soil sample of each soil layer. And crushing the soil sample of each soil layer, then respectively pouring the crushed soil sample into a cylinder, compacting the crushed soil sample to the same compactness as original soil, wherein the diameter of the cylinder is based on the diameter of a pile, the thickness of the soil sample at least meets the detection requirement, and the upper part of the cylinder is reserved with at least 0.2m of space for temporarily storing returned slurry. The grout is mixed according to a preset design proportion to form grout for constructing the high-pressure jet grouting pile, and the grout is stirred with a soil layer in the cylinder to form a first mixed fluid so as to simulate the pile forming process of the high-pressure jet grouting pile, wherein the grout can adopt 42.5-grade fresh ordinary portland cement, and the using amount of the cement is 200 kg/m. Then, the ultrasonic probe 3 is used for measurement, and during the measurement, whether the ultrasonic probe 3 can measure the reflected wave is detected, and if the ultrasonic probe 3 can measure the reflected wave, it is indicated that the ultrasonic wave emitted by the ultrasonic probe 3 can penetrate through the mixed fluid, so that the emission frequency of the ultrasonic probe 3 at present can be used as the emission frequency for implementing the technician, i.e., the working emission frequency. Of course, in the process of determining the operating transmission frequency of the ultrasonic probe 3, the transmission frequency of the ultrasonic probe 3 may be adjusted, and the transmission frequency with the smallest frequency among the transmission frequencies at which the reflected waves can be detected by the several ultrasonic probes 3 is selected as the operating transmission frequency.
After the operating transmission frequency of the ultrasonic probe 3 is determined, since the propagation speeds of the ultrasonic waves in different media are different, it is necessary to determine the propagation speed of the ultrasonic wave transmitted by the ultrasonic probe 3 at the operating transmission frequency in each soil layer. The soil sample of each soil layer is crushed and poured into different cylinders, the slurry is mixed in each cylinder according to a preset design proportion, and second mixed fluid corresponding to different soil layers is stirred, specifically, the second mixed fluid corresponding to the soil layer A is A1, the second mixed fluid corresponding to the soil layer B is B1, the second mixed fluid corresponding to the soil layer C is C1, the second mixed fluid corresponding to the soil layer D is D1, and the second mixed fluid corresponding to the soil layer E is E1. Then, the ultrasonic wave with the working emission frequency penetrates through the A1, B1, C1, D1 and E1 with fixed thicknesses to obtain the propagation time, and the propagation speed V of the ultrasonic wave with the working emission frequency in each second mixed fluid can be calculatedA1、VB1、VC1、VD1And VE1。
During the construction of the high-pressure rotating pile and the process of drilling a hole under the drilling spray rod 11, the ultrasonic probe 3 transmits working ultrasonic waves at a working frequency, a time difference delta t between the transmission of the working ultrasonic waves and the reception of reflected waves by the ultrasonic probe 3 is measured by a timer, the time difference delta t is transmitted back to the processor 8 through the electromagnetic signal transmitting coil 42 and the electromagnetic signal receiving coil 52, the processor 8 obtains the propagation speed of the working ultrasonic waves in the second mixed fluid corresponding to a target soil layer according to the target soil layer where the ultrasonic probe 3 is located, for example, the soil layer where the ultrasonic probe 3 is located is a soil layer A, the soil layer A is the target soil layer, and thus the working ultrasonic waves corresponding to the soil layer A are obtainedPropagation velocity V in second mixed fluid a1A1And calculating the pile forming diameter of the high-pressure jet grouting pile in real time according to S-V-Delta t, wherein S is the pile forming diameter of the high-pressure jet grouting pile, and V is the propagation speed of the working ultrasonic wave. And drilling different soil layers B, C, D and E in the process of drilling the hole under the drilling spray rod 11, and calculating in real time according to the process to obtain the pile forming diameter of the high-pressure jet grouting pile. The constructor can control construction parameters according to the pile forming diameter of the high-pressure jet grouting pile obtained in real time, when the pile forming diameter S is smaller than the designed pile forming diameter, the guniting pressure of the nozzle 12 is increased, the rotating speed of the drill and spray rod 11 is reduced, and when the pile forming diameter S reaches the designed diameter, the drill and spray rod 11 is lifted.
Compared with the prior art, the invention has the beneficial effects that: the ultrasonic probe 3 can detect the position of the solid interface and output the signal measured in real time to the processor 8 through the wireless signal transmitting device 4 and the wireless signal receiving device 5, and the processor 8 calculates the pile forming diameter of the high-pressure jet grouting pile according to the received signal, so that the pile forming diameter of the high-pressure jet grouting pile is monitored in real time, potential safety hazards caused by insufficient pile diameter of the high-pressure jet grouting pile can be avoided, and material waste caused by overlarge pile diameter of the high-pressure jet grouting pile can be avoided; the method has wide applicability, can be suitable for a single-pipe method, a double-pipe method and a three-pipe method, ensures that the pile forming diameter of the high-pressure jet grouting pile meets the design requirement, and can effectively improve the construction quality of the high-pressure jet grouting pile.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention will still fall within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.
Claims (10)
1. The utility model provides a high pressure jet grouting pile becomes stake diameter real-time supervision device for set up on the rig, the rig carries out rotatory actuating mechanism including boring the spray lance, setting nozzle and drive brill spray lance on boring the spray lance, a serial communication port, the device includes first protection box, ultrasonic transducer and treater, first protection box sets up on boring the spray lance and is located the below of nozzle, ultrasonic transducer sets up in first protection box, ultrasonic transducer is connected with wireless signal transmitting device, the treater is connected with wireless signal receiving device, wireless signal transmitting device is connected with wireless signal receiving device.
2. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 1, wherein the drilling and spraying rod comprises an upper pipe section, a first connecting pipe section, a middle pipe section, a second connecting pipe section and a lower pipe section which are connected in sequence, the first connecting pipe section and the second connecting pipe section are both hollow, the wireless signal receiving device is arranged in the first connecting pipe section, a first connecting hole is formed in the outer wall of the second connecting pipe section, the wireless signal transmitting device is arranged in the second connecting pipe section, the first protection box is arranged on the second connecting pipe section, a second connecting hole corresponding to the first connecting hole is formed in one side of the second connecting pipe section, and the ultrasonic probe sequentially penetrates through the second connecting hole and the first connecting hole to be electrically connected with the wireless signal transmitting device through a lead.
3. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 2, wherein the wireless signal transmitting device comprises a second protection box, an electromagnetic signal transmitting coil and a circuit amplifying module, the second protection box is arranged at the top end inside the second connecting pipe section, the electromagnetic signal transmitting coil is vertically arranged in the second protection box, and the circuit amplifying module is arranged in the second protection box and is respectively and electrically connected with the electromagnetic signal transmitting coil and the ultrasonic probe through wires;
the wireless receiving device comprises a third protection box, an electromagnetic signal receiving coil and an output signal interface, wherein the third protection box is arranged in a first connecting pipe section, the electromagnetic signal receiving coil is vertically arranged in the third protection box, the output signal interface is arranged outside the first connecting pipe section and is electrically connected with the electromagnetic signal receiving coil through a wire, and the processor is electrically connected with the output signal interface.
4. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 3, wherein the third protection box is connected with the first connecting pipe through a plurality of steel wires.
5. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 3, wherein the electromagnetic signal transmitting coil is connected with the second protection box through a plurality of first connecting rods, and the electromagnetic signal receiving coil is connected with the third protection box through a plurality of second connecting rods.
6. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 3, wherein a steel sleeve is sleeved outside a lead connected between the output signal interface and the electromagnetic signal receiving coil, one end of the steel sleeve is connected with the third protection box, and the other end of the steel sleeve is connected with the first connecting pipe section.
7. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 1, wherein third connecting rods are arranged at two ends of the ultrasonic probe, and the third connecting rods are connected with the first protection box through a plurality of elastic pieces.
8. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 1, wherein a rubber ring is arranged on one side of the first protection box close to the drilling and spraying rod.
9. The device for monitoring the pile-forming diameter of the high-pressure jet grouting pile in real time as claimed in claim 1, wherein the processor comprises a processing chip and a display connected with the processing chip.
10. A pile-forming diameter real-time monitoring method of a high-pressure jet grouting pile is characterized by comprising the following steps:
drilling and sampling a target site, crushing soil samples of different stratums obtained by sampling, pouring the crushed soil samples into a cylinder, adding slurry into the cylinder according to a preset design proportion, and stirring to form a first mixed fluid, wherein the diameter of the cylinder is the same as the design diameter of a high-pressure jet grouting pile;
the ultrasonic probe is extended into the first mixed fluid for measurement, and whether the ultrasonic probe can receive the reflected wave is detected;
if so, determining the transmitting frequency of the current ultrasonic probe as the working transmitting frequency;
respectively crushing soil samples of different stratums obtained by sampling, respectively adding the crushed soil samples and slurry specified by preset design into different cylinders, and stirring to form second mixed fluid corresponding to each stratum;
for the second mixed fluid corresponding to each stratum, extending the ultrasonic probe into the second mixed fluid, and controlling the ultrasonic probe to emit working ultrasonic waves at a working emission frequency to obtain the propagation velocity of the working ultrasonic waves in each second mixed fluid;
in the process of drilling a hole under the drilling spray rod, the ultrasonic probe is controlled to emit working ultrasonic waves at a working emission frequency, the time difference between the working ultrasonic waves emitted by the ultrasonic probe and the reflected waves received by the ultrasonic probe is obtained in real time, the propagation speed of the working ultrasonic waves in the second mixed fluid corresponding to the target soil layer is obtained according to the current target soil layer where the ultrasonic probe is located, and the pile forming diameter of the high-pressure rotary jet grouting pile is obtained through real-time calculation.
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| CN202110307596.XA CN113123778A (en) | 2021-03-23 | 2021-03-23 | Device and method for monitoring pile forming diameter of high-pressure jet grouting pile in real time |
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| CN102011399A (en) * | 2010-11-05 | 2011-04-13 | 河南理工大学 | PHC pile-based multiple high jet pedestal pile construction method |
| US20130011207A1 (en) * | 2011-07-06 | 2013-01-10 | GuD Geotechnik und Dynamik GmbH | Device and method for surveying jet grouting piles in the ground |
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| CN112228038A (en) * | 2020-09-29 | 2021-01-15 | 中铁大桥局集团有限公司 | Intelligent drilling and online detection system for large-diameter drilled pile |
| CN215485989U (en) * | 2021-03-23 | 2022-01-11 | 中交第四航务工程局有限公司 | Pile-forming diameter real-time monitoring device for high-pressure jet grouting pile |
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- 2021-03-23 CN CN202110307596.XA patent/CN113123778A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102011399A (en) * | 2010-11-05 | 2011-04-13 | 河南理工大学 | PHC pile-based multiple high jet pedestal pile construction method |
| US20130011207A1 (en) * | 2011-07-06 | 2013-01-10 | GuD Geotechnik und Dynamik GmbH | Device and method for surveying jet grouting piles in the ground |
| CN106759299A (en) * | 2017-02-26 | 2017-05-31 | 北京中岩大地科技股份有限公司 | A kind of controllable churning technique in stake footpath |
| CN112228038A (en) * | 2020-09-29 | 2021-01-15 | 中铁大桥局集团有限公司 | Intelligent drilling and online detection system for large-diameter drilled pile |
| CN215485989U (en) * | 2021-03-23 | 2022-01-11 | 中交第四航务工程局有限公司 | Pile-forming diameter real-time monitoring device for high-pressure jet grouting pile |
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