CN110093910B - Magnetic ring type layered settlement testing device and testing method - Google Patents
Magnetic ring type layered settlement testing device and testing method Download PDFInfo
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- CN110093910B CN110093910B CN201910460161.1A CN201910460161A CN110093910B CN 110093910 B CN110093910 B CN 110093910B CN 201910460161 A CN201910460161 A CN 201910460161A CN 110093910 B CN110093910 B CN 110093910B
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- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 239000000523 sample Substances 0.000 claims abstract description 112
- 238000004062 sedimentation Methods 0.000 claims abstract description 84
- 238000005259 measurement Methods 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000001174 ascending effect Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 10
- 230000005571 horizontal transmission Effects 0.000 claims description 4
- 230000005570 vertical transmission Effects 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 15
- 238000013459 approach Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 7
- 230000005674 electromagnetic induction Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention belongs to the field of geotechnical engineering deformation monitoring, and discloses a magnetic ring type layered settlement testing device and a testing method. The device comprises a horizontal conduit, a sedimentation conduit, a probe, a signal receiver and a length measuring instrument, wherein the horizontal conduit is connected with the sedimentation conduit, a trolley, the probe and a transmission mechanism are arranged in the horizontal conduit, the trolley is used for bearing the probe, the transmission mechanism drives the trolley to move left and right in the horizontal conduit and move up and down in the sedimentation conduit, one end of the transmission mechanism is connected with the length measuring instrument, the length measuring instrument is used for measuring the moving distance of the probe, the probe is used for detecting a magnetic ring arranged outside the sedimentation conduit, the probe ascends after descending to the bottom of the pipe in the sedimentation conduit, when the probe is contacted with the magnetic ring and approaches, the signal receiver gives an alarm, and the ascending height of the probe displayed in the length measuring instrument at the moment is recorded, so that the measurement of sedimentation at the magnetic ring is realized. The invention can avoid the influence of engineering construction and simply realize the measurement of sedimentation.
Description
Technical Field
The invention belongs to the field of geotechnical engineering deformation monitoring, and particularly relates to a magnetic ring type layered settlement testing device and a testing method.
Background
In filling projects such as preloading, airport/embankment construction, depression leveling, reclamation land construction and the like, in order to ensure the stability of a filling body and the construction quality, constructors need to monitor and record the layered settlement of each soil layer of a foundation below the filling projects. The currently common measurement method is a layered sedimentation method. The main working principle of the layered settlement meter is electromagnetic induction, the concrete method is that the lower end of a PVC pipe is fixed in a relatively stable underground deep soil layer, magnetic rings are sleeved on the pipe from bottom to top in sequence, when the soil body subsides, the magnetic rings can subside along with the adjacent soil body, the positions of the magnetic rings are measured and recorded by a probe, and the subsidence of the corresponding soil layer can be known by comparing the last measuring result.
The method has the advantages of simple operation and portable instrument, but has the following disadvantages from the current practical use condition: (1) The sedimentation conduit needs to extend out of the filling body, is easy to damage in the upper mechanized construction process, and technicians need to repair the sedimentation conduit in time, so that the construction progress and quality are affected, and the construction cost is increased; (2) In the construction process, the filled soil body is easy to generate uneven sedimentation due to the reasons of machine rolling and the like, so that the sedimentation conduit is greatly deformed and inclined, and the subsequent probe cannot smoothly slide in; (3) Along with the construction of the upper filling engineering, the length of the sedimentation conduit needs to be lengthened in time, and the operation is complicated; (4) Mechanical rolling is disturbed in a certain range around the sedimentation conduit, and construction quality is affected.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a magnetic ring type layered settlement test device and a test method, which can accurately monitor the settlement value of each soil layer in the whole construction process without influencing the upper construction through the design and layout of the whole structure of the settlement device.
To achieve the above object, according to one aspect of the present invention, there is provided a magnetic ring type layered settlement test apparatus comprising a horizontal conduit, a settlement conduit, a probe, a signal receiver, and a length measuring instrument, wherein:
The horizontal conduit is connected with the sedimentation conduit, and a transmission mechanism and a trolley are arranged in the horizontal conduit and are used for carrying and conveying the probe. The trolley is used for bearing the probe, the transmission mechanism is used for driving the trolley to move left and right in the horizontal guide pipe and move up and down in the sedimentation guide pipe, one end of the transmission mechanism is connected with a length measuring instrument which is used for measuring the moving distance of the probe, the probe is used for detecting a magnetic ring arranged outside the sedimentation guide pipe, the probe ascends after descending to the bottom of the pipe in the sedimentation guide pipe, when the probe contacts with the magnetic ring and approaches, the signal receiver sends out an alarm, records the ascending height of the probe displayed in the length measuring instrument at the moment, thereby realizing the measurement of sedimentation at the magnetic ring,
The transmission mechanism comprises a horizontal transmission unit and a vertical transmission unit, wherein the horizontal transmission unit is used for driving the probe to move left and right in a horizontal guide pipe and comprises a traction rope and a reversing pulley, the reversing pulley is arranged at the tail end of the horizontal guide pipe, which is close to one side of the sedimentation guide pipe, one end of the traction rope is arranged outside the horizontal guide pipe, the traction rope is wound on the reversing pulley, so that the other end of the traction rope is connected with the trolley, a slide support is arranged on the trolley, a chute matched with the slide support is arranged in the horizontal guide pipe, and when one end of the traction rope outside the horizontal guide pipe is pulled, the trolley moves towards one end of the sedimentation guide pipe along the chute;
The vertical transmission unit is used for driving the probe to move up and down in the sedimentation conduit, wherein a cable and a fixed pulley are arranged, the fixed pulley is connected with a large pulley on the trolley, one end of the cable is connected with the length measuring instrument, and the other end of the cable is connected with the probe through the fixed pulley and the large pulley.
Further preferably, an L-shaped conveying frame is arranged below the trolley, a ring sleeve with a narrow upper part and a wide lower part is arranged at the tail end of the conveying frame, the radius of the wide part is larger than the radius of the probe, when the probe is pulled to move upwards in the sedimentation catheter after measurement is completed, the probe is convenient to enter the ring sleeve, the radius of the narrow part is smaller than the radius of the probe, and when the probe enters the ring sleeve, the probe is prevented from penetrating through the ring sleeve and being higher than the ring sleeve, so that the maximum height of the probe is limited.
Further preferably, the sum of the length of the L-shaped conveying frame in the horizontal direction and the radius of the annular sleeve is equal to the radius of the large pulley groove, so that the cable connected with the probe above the probe is ensured to be in the vertical direction.
Further preferably, a baffle is disposed in the horizontal conduit, and the baffle is disposed at the end of the horizontal conduit and is used for limiting the farthest position of the trolley when moving towards the sedimentation conduit, and at the same time, the probe is directly above the sedimentation conduit, so as to avoid collision between the probe and the wall of the sedimentation conduit in the process of moving up and down.
Further preferably, the horizontal conduit is arranged in a horizontal direction and the sedimentation conduit is arranged in a vertical direction, the two being connected by a connecting elbow.
Further preferably, the horizontal conduit and the sedimentation conduit are both PVC plastic pipes.
Further preferably, the horizontal conduit is buried at least 0.5 meter below ground level at the time of measurement.
According to another aspect of the present invention, there is also disclosed a testing method of the sedimentation testing device described above, the method comprising the steps of:
(a) The probe is sleeved in a loop of the trolley, a traction rope outside the horizontal conduit is pulled, the trolley drives the probe to move rightwards to the upper part of the sedimentation conduit, and the probe descends to the bottom of the sedimentation conduit under the action of gravity;
(b) The length measuring instrument rotates and pulls the probe to ascend in the sedimentation catheter, when the probe senses the first magnetic ring, the signal receiving instrument sounds, the scale D 1 on the length measuring instrument at the moment is recorded, the probe continues to ascend to obtain the scale h 1 n on the length measuring instrument at the nth magnetic ring, and Δh 1 n＝D1－h1 n is calculated, wherein Δh 1 n is the distance from the nth magnetic ring to the first magnetic ring in the first measurement, D 1 is the height of the first magnetic ring in the first measurement, h 1 n is the height of the nth magnetic ring in the first measurement, n=2, 3, … and n is a positive integer larger than 1;
(c) Returning to the step (a) until the height D a of the first magnetic ring measured for the a-th time, the height h a n of the nth magnetic ring measured for the a-th time and the distance Δh a n from the nth magnetic ring to the first magnetic ring measured for the a-th time are obtained, a=1, 2,3, …, and a is a positive integer greater than 0;
(d) A sedimentation value at each magnet ring is calculated.
Further preferably, in step (d), said calculating a sedimentation value at each magnetic ring is preferably performed according to the following expression:
δ a1 n =Δh a n－△h1 n #
Where δ a1 n is the total sedimentation value at the nth magnetic ring at the a-th measurement.
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 testing device provided by the invention has the advantages that the horizontal guide pipe and the sedimentation guide pipe are adopted, so that the components in the testing device are not influenced by external environment, the testing device can be buried underground at a construction site for measurement, the construction of an upper structure is not influenced, the damage and the inclination of the sedimentation guide pipe are not caused, the smooth construction is ensured, and the accuracy of measurement is improved;
2. The testing device provided by the invention has the advantages of simple structure, easy disassembly and carrying, repeated use of the probe, the signal receiver, the length measuring instrument, the trolley and the cable, low cost and high economic benefit.
Drawings
FIG. 1 is a schematic diagram of a sedimentation testing device constructed in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a horizontal conduit constructed in accordance with a preferred embodiment of the invention;
FIG. 3 is a cross-sectional view of a horizontal conduit constructed in accordance with a preferred embodiment of the present invention;
FIG. 4 is a schematic illustration of a connecting elbow constructed in accordance with a preferred embodiment of the present invention;
FIG. 5 is a front view of a cart constructed in accordance with a preferred embodiment of the invention;
FIG. 6 is a schematic side view of a cart constructed in accordance with a preferred embodiment of the invention;
FIG. 7 is an enlarged view of a portion of a horizontal conduit of a test device constructed in accordance with a preferred embodiment of the present invention.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein:
The device comprises a horizontal conduit, a 2-sedimentation conduit, a 3-connecting elbow, a 4-magnetic ring, a 5-probe, a 6-signal receiver, a 7-length measuring instrument, an 8-chute, a 9-trolley, a 10-hauling rope, an 11-cable, a 12-ground, a 13-embankment, a 14-measuring workstation, a 15-baffle, a 16-fixed pulley, a 17-reversing pulley, a 18-large pulley, a 19-sliding support, a 20-conveying frame, a 21-hauling frame, a 22-connecting shaft and a 23-loop.
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.
As shown in fig. 1, the invention provides a novel magnetic ring type layered settlement test device, which comprises a horizontal conduit 1, a settlement conduit 2, a connecting elbow 3, a magnetic ring 4, a probe 5, a signal receiver 6, a length measuring instrument 7, a trolley 9, a traction rope 10 and a cable 11.
The magnetic ring 4 is sleeved on the sedimentation conduit 2 and can move up and down along the pipe freely, the probe 5 can move left and right in the horizontal conduit 1 along with the trolley 9 under the traction action of the traction rope 10, and the probe 5 can also move up and down freely in the sedimentation conduit 2 under the traction action of the cable 11.
The conduit consists of a horizontal conduit 1 arranged along the horizontal direction, a vertical sedimentation conduit 2 arranged along the vertical direction and a connecting elbow 3 between the horizontal conduit and the vertical sedimentation conduit, the conduit adopts a special PVC plastic pipe, the horizontal conduit 1 and the vertical sedimentation conduit are formed by connecting a plurality of sections of conduits through external joints, and the burial depth of the horizontal conduit is about 0.5 m.
Fig. 2 is a schematic cross-sectional view of a horizontal conduit 1 constructed in accordance with a preferred embodiment of the present invention; fig. 3 is a cross-sectional view of a horizontal conduit 1 constructed in accordance with a preferred embodiment of the present invention, as shown in fig. 2 and 3, wherein a chute 8 is provided in the horizontal conduit 1 for a trolley 9 to pass through, a baffle 15 is provided at the end of the chute 8, and when the trolley 9 carries a probe 5 to the position of the baffle 15, the trolley is blocked from continuing to move forward, and the probe 5 is positioned right above the sedimentation conduit 2; the inlet end of the horizontal conduit 1 is provided with a detachable fixed pulley 16 which is arranged at the conduit opening during measurement and can be removed after the measurement is completed.
As shown in fig. 4, a reversing pulley 17 is installed inside the connecting elbow 3 to change the traction direction of the traction rope 10, so that the trolley can move rightward when the traction rope is pulled left. The reversing pulley 17 is provided with a circle of protective sleeve to prevent the traction rope 10 from sliding out of the fixed pulley during storage and use.
An electric control reel is arranged in the length measuring instrument 7, in the embodiment, the length measuring instrument 7 adopts a steel ruler instrument, and the cable 11 can be in a tightening state in the use process by controlling the rotation direction and the speed of the length measuring instrument 7 in the measuring process; when the length measuring instrument 7 rotates forward, the cable 11 gradually extends, and when the length measuring instrument 7 rotates backward, the cable 11 gradually shortens.
As shown in fig. 5, the trolley 9 is composed of a large pulley 18, two slide brackets 19, a conveying frame 20, a traction frame 21, a connecting shaft 22 and a ring sleeve 23. The two sliding supports 19 can be embedded into the sliding chute 8 in the horizontal guide pipe 1 and slide smoothly, and other components are connected through the connecting shaft 22; the ring sleeve 23 of the conveying frame 20 is narrow at the upper part and wide at the lower part, and the radius of the wide part is larger than that of the probe 5, so that the probe can smoothly enter the ring sleeve 23 in the upward pulling process, and the radius of the narrow part is smaller than that of the probe, so that the probe cannot exceed the height of the conveying frame 20 in the upward pulling process, and collision with other components is avoided; the traction frame 21 is connected with the traction rope 10 and controls the trolley 9 to move rightwards; the cable 11 is connected with the probe 5 across the groove of the large pulley 18, and the trolley 9 can be controlled to move leftwards in the horizontal guide pipe 1 and the probe 5 can be controlled to move upwards and downwards in the sedimentation guide pipe 2.
The probe 5 is connected with the length measuring instrument 7 and the signal receiving instrument 6 through the cable 11, and after the probe 5 reaches the position right above the sedimentation conduit 2, the friction resistance and the air resistance between the cable 11 and the detachable fixed pulley 16 as well as between the probe 5 and the large pulley 18 can be overcome, the probe slides downwards under the action of dead weight, and the sliding speed is controlled through the length measuring instrument 7.
As shown in fig. 7, the cable 11 is used to control the trolley 9 to move left in the horizontal conduit 1 and the probe 5 to move up and down in the sedimentation conduit 2; the hauling cable 10 is used for controlling the trolley 9 to move rightwards in the horizontal duct 1, and the baffle 15 is used for controlling the furthest position of the trolley 9 which can be reached in the horizontal duct 1.
One end of the hauling rope 10 spans the reversing pulley 17 on the connecting elbow 3 to be connected with the hauling frame 21 of the trolley 9, and the other end extends out of the horizontal conduit 1 so as to be used for the traction of staff in the measuring workstation 14 and control the trolley 9 to move rightwards; the cable 11 moves between the detachable fixed pulley 16 and the large pulley 18, one end of the cable is connected with the probe 5, and the other end of the cable is connected with the length measuring instrument 7 and the signal receiving instrument in the measuring workstation 14, so that the trolley 9 can be controlled to move leftwards in the horizontal guide pipe 1, and after the positioning is successful, the probe 5 can be controlled to move up and down in the sedimentation guide pipe 2.
The length measuring instrument 7 is internally provided with an electric control reel, so that the rotation direction and speed can be controlled, and the cable 11 is ensured to be in a tight state when required.
The probe 5 is provided with an electromagnetic induction point which can generate electromagnetic induction with the magnetic ring 4, and the signal receiver 6 can receive electromagnetic induction signals sent by the probe 5 and the magnetic ring 4.
As shown in fig. 6, the loop 23 of the trolley conveying frame 20 is narrow in upper part and wide in lower part, the radius of the wide part is larger than that of the probe 5, so that the probe 5 smoothly enters the loop 23 in the process of pulling up, and the radius of the narrow part is smaller than that of the probe, so that the probe 5 is positioned in the process of pulling up, and the height of the conveying frame 20 is not exceeded, so that collision with other components is avoided; when the probe 5 enters the loop 23 in the pulling-up process and is positioned successfully, the cable 11 is pulled back continuously, and the cable is in a tight state, so that the next operation is convenient.
The carriage 20 extension of the trolley 9 is designed so that the sum of its horizontal extension and the radius of the collar 23 is equal to the radius of the groove of the large pulley 18, ensuring that the cable 11 connecting the probe 5 above the probe 5 is in the vertical direction.
The length of the chute 8 in the horizontal conduit 1 and the position of the baffle 15 are designed to ensure that the probe 5 on the carriage 20 of the trolley 9 is located directly above the sedimentation conduit 2 when the trolley 9 is stopped.
The following provides detailed mounting and measurement steps of the present invention:
[ catheter and magnetic ring Assembly ]
Step one: drilling holes to a designed depth (relatively stable stratum depth) on a foundation along the vertical direction by using a drilling machine, connecting and assembling a plurality of sections of sedimentation pipes to form a sedimentation pipe 2, installing magnetic rings 4 outside the sedimentation pipe at certain intervals, and vertically descending the sedimentation pipe 2 with the magnetic rings 4 to the bottom of the holes.
Step two: when the upper end of the sedimentation pipe 2 is about 0.5m from the ground, the connecting bend 3 is installed, the direction of the pipe is changed to the horizontal direction, the diverting pulley 17 is installed inside the connecting bend 3 as shown in fig. 4, and the traction rope 10 is passed through the diverting pulley 17.
Step three: the horizontal direction of the left side is grooved in stages according to the depth of the horizontal end of the connecting elbow 3. After the grooving of each stage is completed, the horizontal guide pipe is assembled in time, so that the haulage rope 10 is ensured to be always in the horizontal guide pipe, and two ends of the haulage rope extend out of the guide pipe opening. This step is repeated until the horizontal channel extends a distance beyond the base toe, the horizontal conduit 1 is assembled, and a measuring station 14 capable of accommodating a single working space is dug at the channel port.
[ Measurement preparation ]
Step four: before the measurement starts, a worker stands in the measurement workstation 14 and performs the following operations in sequence:
And (I) opening the signal receiver 6, sleeving the probe 5 by using a magnetic ring, moving along the probe, observing whether the signal receiver 6 generates a beep or not when the magnetic ring moves to an electromagnetic induction point on the probe 5, and if the signal receiver 6 generates a reaction, the instrument is normal, starting measurement preparation work, and if the instrument does not react, checking the state of the instrument and repairing in time (instrument test).
Secondly, the cable 11 passes through the upper groove of the detachable fixed pulley 16 and then passes through the upper groove of the large pulley 18 of the trolley 9, and is connected with the probe 5 through the loop 23 of the conveying frame 20;
thirdly, one end of the hauling cable 10 in the horizontal conduit 1 is tied to a horizontal ring at the top of the trolley hauling frame 21;
And (IV) reversing the length measuring instrument 7 until the cable 11 is stretched, and embedding the probe 5 into the annular sleeve 23 of the trolley conveying frame 20 under the traction action of the cable.
Step five: after the assembly is completed, the slide support 19 of the trolley 9 is embedded into the sliding groove 8 in the horizontal guide pipe 1, the sliding groove is placed into the horizontal guide pipe 1, the detachable fixed pulley 16 is installed on the pipe wall at the inlet end of the horizontal guide pipe 1 as shown in fig. 3, and the cable 11 is adjusted until the tension state is formed between the detachable fixed pulley 16 and the trolley large pulley 18 by utilizing the electric control reel of the length measuring instrument 7.
[ Measurement work ]
Step six: the staff pulls the hauling cable 10 leftwards slowly to extend out of one end of the horizontal conduit port, and the other end of the hauling cable 10 moves the hauling trolley 9 rightwards slowly under the action of the reversing pulley 17; meanwhile, the moving speed of the cable 11 is controlled through the length measuring instrument 7, so that the moving speed of the cable is consistent with the speed of the traction rope 10, and the cable 11 is kept in a tight state all the time in the moving process along with the trolley.
Step seven: when the trolley 9 moves to the baffle 15, stopping the trolley, and conveying the probe 5 to the position right above the sedimentation conduit 2 by the trolley conveying frame 20; pulling the pull rope 10, slowly rotating the length measuring instrument 7 forward, and loosening the cable 11 to enable the probe 5 to slowly fall down the sedimentation pipe 2 under the action of self weight until the probe approaches the bottom of the pipe.
Step eight: the length measuring instrument 7 is slowly reversed, under the action of the two groups of pulleys (16 and 18), the cable 11 moves leftwards in the horizontal conduit 1, moves upwards in the sedimentation conduit 2, drives the probe 5 to slowly move upwards in the sedimentation conduit 2, when the probe 5 reaches the first magnetic ring (namely the magnetic ring closest to the bottom of the sedimentation conduit for measuring the elevation) 4, the electromagnetic induction point on the probe 5 and the magnetic ring 4 are induced, the signal receiver 6 receives electromagnetic signals to generate beeping sounds, the instrument also generates a reaction, the rotation of the length measuring instrument 7 is stopped at the moment, and the scale of the cable 11 at the moment is recorded as the elevation D 1 measured for the first time.
Step nine: the length measuring instrument 7 is continuously and slowly reversed, the probe 5 is continuously moved upwards in the sedimentation catheter 2 until reaching the depth of the next magnetic ring (namely the second magnetic ring), the signal receiver 6 sounds a beep, the rotation of the length measuring instrument 7 is stopped, the scale of the cable 11 at the moment is recorded as a measured value h 1 2 of the second magnetic ring, and recorded values delta h 1 2＝D1－h1 2 are respectively filled in a record form. (superscript 1 indicates the 1 st measurement and subscript 2 indicates the second magnetic ring)
Step ten: and step nine is repeated until the measurement of all the magnetic rings is completed, the measured elevation D 1, the measured value h 1 2,……,h1 n and the recorded value Deltah 1 2,……,△h1 n are recorded, and the measurement is finished. (the superscript indicates the number of times of measurement, the subscript indicates the number of magnetic rings, n is the number of magnetic rings, and n is a positive integer greater than 1)
Step eleven: after the measurement is finished, the length measuring instrument 7 is continuously reversed, and the probe 5 is continuously moved upwards under the traction action of the cable 11 until the probe is embedded into the annular sleeve 23 of the trolley conveying frame 20, and the upwards moving process is blocked. Then loosening the haulage rope 10, continuing to reverse the length measuring instrument 7, moving the haulage trolley 9 leftwards in the horizontal conduit 1 by the cable 11, when the trolley moves to the pipe orifice of the horizontal conduit 1, firstly taking down the detachable fixed pulley 16 of the pipe orifice, then taking out the trolley from the pipe, taking down the probe 5, the haulage rope 10 and the cable 11, retracting the detachable fixed pulley 16, the trolley 9, the probe 5 and the cable 11, leaving the haulage rope 10 in the horizontal conduit, ensuring that both ends of the haulage rope extend out of the pipe orifice, and reserving for the next measurement.
[ A-th measurement ]
And (3) repeating the fourth to eleventh measuring steps in the a-th measurement, recording the measured elevation D a in the a-th measurement, and recording the measured value h a 2～ha n and the recorded value Deltah a 2～△ha n.
Then, for the nth magnetic ring, δ ab n =i, Δh a n－△hb n i is the sedimentation value of the nth magnetic ring in the time interval of two measurements of a and b; δ a1 n =Δh a n－△h1 n i is the total sedimentation value of the nth magnetic ring when the measurement is performed for the a-th time.
The measured elevation D a is the height of the first magnetic ring in the a-th measurement, the measured value h a n is the height of the nth magnetic ring in the a-th measurement, the recorded value Deltah a n is the distance from the nth magnetic ring to the first magnetic ring in the a-th measurement, a and b are the measurement times numbers, a=1, 2,3 and …, and a is a positive integer; b=1, 2,3, …, b is a positive integer, and a+.b; n is the number of magnetic rings, n=2, 3, …, and n is a positive integer greater than 1.
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 (6)
1. The utility model provides a magnetic ring formula layering subsides testing arrangement, its characterized in that, this device includes horizontal pipe (1), subsides pipe (2), probe (5), signal receiver (6) and length measuring instrument (7), wherein:
The horizontal conduit (1) is connected with the sedimentation conduit (2), a trolley (9), a probe (5) arranged at the lower end of the trolley and a transmission mechanism are arranged in the horizontal conduit (1), the trolley (9) is used for bearing the probe (5), the transmission mechanism is used for driving the trolley (9) to move left and right in the horizontal conduit (1) and to sink upwards or downwards in the sedimentation conduit (2), one end of the transmission mechanism is connected with a length measuring instrument, the length measuring instrument (7) is used for measuring the descending height of the probe (5), the probe (5) is used for detecting a magnetic ring (4) arranged in the sedimentation conduit, the probe ascends after descending to the bottom of the tube in the sedimentation conduit (2), and when the probe is contacted with the magnetic ring, the signal receiving instrument gives an alarm, and the ascending height of the probe displayed in the length measuring instrument at the moment is recorded, so that the sedimentation measurement is realized;
The transmission mechanism comprises a horizontal transmission unit and a vertical transmission unit, wherein the horizontal transmission unit is used for driving the probe (5) to move left and right in the horizontal guide pipe (1), the transmission mechanism comprises a traction rope (10) and a reversing pulley (17), the reversing pulley (17) is arranged at the tail end of the horizontal guide pipe, which is close to one side of the sedimentation guide pipe (2), one end of the traction rope (10) is arranged outside the horizontal guide pipe (1), the traction rope is wound on the reversing pulley (17) so that the other end of the traction rope is connected with the trolley (9), a sliding support (19) is arranged on the trolley, a sliding groove (8) matched with the sliding support is arranged in the horizontal guide pipe, and when one end of the traction rope outside the horizontal guide pipe is pulled, the trolley moves towards one end of the sedimentation guide pipe along the sliding groove (8);
The vertical transmission unit is used for driving the probe to move up and down in the sedimentation conduit, wherein a cable (11) and a fixed pulley (16) are arranged, the fixed pulley is connected with a large pulley (18) on the trolley, one end of the cable is connected with the length measuring instrument, and the other end of the cable is connected with the probe through the fixed pulley and the large pulley;
An L-shaped conveying frame (20) is arranged below the trolley (9), the tail end of the conveying frame (20) is provided with a ring sleeve (23) with a narrow upper part and a wide lower part, the radius of the wide part is larger than the radius of the probe, when the probe is pulled to move upwards in the sedimentation catheter after measurement is completed, the probe is convenient to enter the ring sleeve (23), the radius of the narrow part is smaller than the radius of the probe, and after the probe enters the ring sleeve, the probe is prevented from penetrating through the ring sleeve and being higher than the ring sleeve, so that the maximum height of the probe is limited;
An electric control reel is arranged in the length measuring instrument (7) and can control the rotation direction and speed, so that the cable (11) is in a tight state when needed;
The sum of the length of the L-shaped conveying frame (20) in the horizontal direction and the radius of the annular sleeve (23) is equal to the radius of the groove of the large pulley (18), so that the cable (11) connected with the probe above the probe is ensured to be in the vertical direction;
The horizontal guide pipe is internally provided with a baffle (15), and the baffle is positioned at the tail end of the horizontal guide pipe and used for limiting the farthest position of the trolley when moving towards the sedimentation guide pipe, and meanwhile, the borne probe is positioned right above the sedimentation guide pipe so as to avoid collision between the probe and the pipe wall of the sedimentation guide pipe in the process of up-down movement.
2. A magnetic ring type layered sedimentation testing device as claimed in claim 1, wherein the horizontal conduit is arranged in a horizontal direction and the sedimentation conduit is arranged in a vertical direction, and the two conduits are connected by a connecting elbow (3).
3. A magnetic loop type layered settlement test device as claimed in claim 1, wherein the horizontal conduit and the settlement conduit are each PVC plastic pipes.
4. A magnetic loop type layered settlement test device as claimed in claim 1, wherein the horizontal conduit (1) is buried at least 0.5 m below the ground surface at the time of measurement.
5. A method of testing a sedimentation test device as claimed in any one of claims 1-4, characterized in that the method comprises the steps of:
(a) The probe is sleeved in a loop of the trolley, a traction rope outside the horizontal conduit is pulled, the trolley drives the probe to move rightwards to the upper part of the sedimentation conduit, and the probe descends to the bottom of the sedimentation conduit under the action of gravity;
(b) The length measuring instrument rotates and pulls the probe to ascend in the sedimentation catheter, when the probe senses the first magnetic ring, the signal receiving instrument sounds, the scale D 1 on the length measuring instrument at the moment is recorded, the probe continues to ascend to obtain the scale h 1 n on the length measuring instrument at the nth magnetic ring, and Δh 1 n＝D1－h1 n is calculated, wherein Δh 1 n is the distance from the nth magnetic ring to the first magnetic ring in the first measurement, D 1 is the height of the first magnetic ring in the first measurement, h 1 n is the height of the nth magnetic ring in the first measurement, n=2, 3, … and n is a positive integer larger than 1;
(c) Returning to the step (a) until the height D a of the first magnetic ring measured for the a-th time, the height h a n of the nth magnetic ring measured for the a-th time and the distance Δh a n from the nth magnetic ring to the first magnetic ring measured for the a-th time are obtained, a=1, 2,3, …, and a is a positive integer greater than 0;
(d) A sedimentation value at each magnet ring is calculated.
6. The test method of claim 5, wherein in step (d), the calculating of the sedimentation value at each magnetic ring is performed according to the following expression:
δ a1 n =Δh a n－△h1 n #
Where δ a1 n is the total sedimentation value at the nth magnetic ring at the a-th measurement.
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