CN103953025A - Equipment for measuring layered settlement of deep soft soil or blanket and setup method thereof - Google Patents
Equipment for measuring layered settlement of deep soft soil or blanket and setup method thereof Download PDFInfo
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- CN103953025A CN103953025A CN201410201969.5A CN201410201969A CN103953025A CN 103953025 A CN103953025 A CN 103953025A CN 201410201969 A CN201410201969 A CN 201410201969A CN 103953025 A CN103953025 A CN 103953025A
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- guide rod
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Abstract
The invention discloses a kind of equipment for measuring layered settlement of deep soft soil or a blanket and a setup method thereof. A settlement observation pipe is embedded in a drill hole; a guide rod is arranged in the settlement observation pipe; the equipment is characterized in that the guide rod is formed by the connection of a plurality of common guide rods and a stainless steel guide rod, wherein the stainless steel guide rod is adopted at the place wherein the layered settlement is to be measured; an anchoring head is mounted at the bottom of the guide rod; the anchoring head is in sealing connection with the guide rod; in the meantime, a section of the anchoring head is tightly connected with the settlement observation pipe; a guide rod sealing cap is mounted at the top of the guide rod; a line outgoing device is arranged on the sealing cap; a reed switch-resistance sensing element is arranged inside the stainless steel guide rod; data lines of the reed switch-resistance sensing element are collected to form a data cable before the line outgoing device at the top of the guide rod, and connected with an external electric signal receiving reading device through the leading of the line outgoing device; a magnetic ring is mounted in a sleeving manner at the place where the layered settlement is required to be measured out of the settlement observation pipe. The equipment for measuring the layered settlement of the deep soft soil or the blanket is simple in installation and measurement, and can realize automatic measurement.
Description
Technical field
The invention belongs to the fields such as geotechnical engineering soft foundation engineering survey monitoring, be specifically related to a kind of measureing equipment of measuring Deep Thick Soft Ground or covering layer delaminating deposition.The invention still further relates to the method to set up of this measurement Deep Thick Soft Ground or covering layer delaminating deposition equipment.
Background technology
Along with social economy is fast-developing and reform and opening-up deepens continuously, national basis arranges to build to develop makes rapid progress, the buildings such as speedway, harbour, harbour are on the increase, and the not treated natural good ground that can directly utilize is fewer and feweri, make many buildings have to be built in the Deep Thick Soft Ground of less stable.Deep soft soil foundation because its moisture content is high, bad hydraulic permeability, compressibilty is large, intensity is low, under building load effect, can produce larger sedimentation and settlement difference, bearing capacity of foundation soil and stability cannot meet requirement of engineering, need to when consolidation process, measure the inner different parts sedimentation of foundation, and survey data analysis is taked to counter-measure.
Build at home at supratectal dam and increase gradually in recent years, while building dam, covering layer will be measured its sedimentation after treatment, and survey data is carried out to analyzing and processing to guarantee the distortion of dam lower caldding layer, stable and Seepage Safety.
The measuring method of traditional deep soft soil foundation delaminating deposition is to install to bury a sedimentation pipe underground, measuring the common magnet ring of the place of delaminating deposition in the sealing of sedimentation pipe overcoat, adopt delaminating deposition readout instrument to put into the size that sedimentation pipe is monitored soil body delaminating deposition.What the soil body of employing delaminating deposition readout instrument measurement at present delaminating deposition generally adopted is all comprised of delaminating deposition readout instrument, sedimentation pipe, magnet ring (also referred to as magnetic rings) and locating ring, the external diameter of locating ring is larger than the internal diameter of magnet ring, and the internal diameter of magnet ring is larger than the external diameter of sedimentation pipe, to guarantee that magnet ring can move freely along sedimentation pipe.When measuring, delaminating deposition needs manually from sedimentation pipe bottom, slowly up to draw the cable of delaminating deposition readout instrument, move the local delaminating deposition readout instrument that magnet ring is installed to and send tweeting sound, can after check that on delaminating deposition readout instrument cable, ruler scale calculates soil body delaminating deposition size.This delaminating deposition measuring method is measured and must in sedimentation pipe, manually be pulled up and down by a delaminating deposition readout instrument always, not only wastes time and energy, and artificial error in reading is also large, and can not realize automatic measurement.
Past generally adopts hydraulic pressure settlement gauge to monitor to dam foundation covering layer settlement monitoring, but it is more difficult that this instrument adopts boring to install, adopt the sedimentation of hydraulic pressure settlement gauge monitoring dam foundation covering layer only for monitoring tectal total settlement, and hydraulic pressure settlement gauge is due to by causing the pipe-line system transmit fluid pressure behind dam, thereby tend to transmit the undesirable reliability that certainty of measurement affects monitoring result that affects because pipeline problem causes fluid pressure.Along with building dam technical development on covering layer, in the urgent need to dam foundation covering layer total settlement and delaminating deposition are monitored with dam on ensuring coverage layer and basic safety thereof, dam engineering construction and scientific research personnel attempt adopting from the boring of dam foundation covering layer and sedimentation pipe are installed and with dam, are filled the delaminating deposition measuring method cross beam type electrical measurement settlement gauge that spreading sedimentation pipe causes dam surface by dam body piecemeal dam foundation covering layer delaminating deposition is monitored, the former is except existing with above-mentioned " measuring method of traditional deep soft soil foundation delaminating deposition " the same problem, its sedimentation pipe causes dam body surface with dam embankment spreading and not only dam filling construction is disturbed large, and protection difficulty, be easy to cause sedimentation pipe to destroy, thereby the measuring method of its delaminating deposition adopting is fallen flat, and a plurality of delaminating depositions of cross beam type electrical measurement settlement gauge monitoring covering layer need many cover instruments, instrument cost is high, and its installation protection difficulty is high, easily causes the cross beam type electrical measurement settlement gauge cisco unity malfunction of installing.Dam deep alluvion foundation delaminating deposition Monitoring Result is substantially in space state at present, the operating characteristic of dam foundation covering layer total settlement and delaminating deposition analysis being assessed to dam and deep covering layer dam foundation safety and the research deep covering layer dam foundation according to field data also just cannot be implemented, the plant and instrument that can monitor for dam deep covering layer ground delaminating deposition in the urgent need to exploitation.
Summary of the invention
The technical problem that will solve required for the present invention is to overcome existing technological deficiency; A kind of equipment and method to set up thereof of measuring Deep Thick Soft Ground or covering layer delaminating deposition is provided.Need the key problem in technology solving to be: to improve and fill up existing delaminating deposition readout instrument measuring technique defect, equipment and the complete set technology of a kind of novel measurement Deep Thick Soft Ground or covering layer delaminating deposition are provided, sedimentation pipe does not need to install to be buried underground outside the soil body that will measure, do not need with artificial pulling layer sedimentation readout instrument cable, the data cable that directly adopts the measurement of sensor signal reception readout instrument to guide to outside the soil body just can obtain Deep Thick Soft Ground or covering layer delaminating deposition.
The technical scheme that completes foregoing invention task is,
A kind of equipment of measuring Deep Thick Soft Ground or covering layer delaminating deposition, in boring, be embedded with settlement observation pipe, in this settlement observation pipe, be provided with guide rod, it is characterized in that, described guide rod is formed by connecting by some common guide rods and stainless steel guide rod, wherein, in the place that will measure delaminating deposition, adopt stainless steel guide rod; Described guide rod bottom is provided with anchorage head, and this anchorage head and guide rod are tightly connected, and one of this anchorage head section is closely connected with settlement observation pipe simultaneously; Described guide rod top is provided with guide rod seal cover, and sealing covers and is provided with outlet device; Described stainless steel guide rod inside is provided with tongue tube-resistance sensing element; The data wire of described tongue tube-resistance sensing element accumulates a single data cable before the outlet device at guide rod top, and is drawn with external electric signal reception readout instrument and be connected by described outlet device; The place (being generally at settlement observation pipe outer tip end 1/3 place of measuring delaminating deposition) that needs to measure delaminating deposition at settlement observation pipe is outward set with magnet ring.
The prioritization scheme of above equipment has:
1, this guide rod (or is called: guide rod centering rubber ring), make guide rod be positioned at all the time settlement observation pipe middle part every centering rubber ring of 1m cover;
2, described stainless steel guide rod 2m/ root, can measure large-scale sedimentation, and other is local with common guide rod connection, common guide rod 1m/ root;
3, described stainless steel guide rod is connected with guide rod joint for sealing connecting with common guide rod; Between guide rod joint for sealing connecting and guide rod, have sealing ring, anti-sealing and silt enter guide rod internal cavities;
4, at the two ends of tongue tube-resistance sensing element, there is fixator fixing seal that tongue tube-resistance sensing element is installed, tongue tube-resistance sensing element can not be moved;
5, the outer tube mouth of pipe of described settlement observation pipe adopts the protection of sedimentation pipe over cap;
6, on anchorage head, be provided with threaded hole of steel, on this threaded hole of steel, be installed with a steel wire, the many 3 meters of left and right of the Length Ratio hole depth of steel wire, steel wire the outside is fixed on a firm thing.
More specifically and more optimally say, device structure of the present invention is:
Settlement observation pipe adopts conventional sedimentation pipe, and its internal diameter is 70mm, and the outer tube mouth of pipe adopts the protection of sedimentation pipe over cap; The measuring stick of common guide rod and stainless steel guide rod is installed in the middle of sedimentation pipe, guide rod overlaps a guide rod centering rubber ring every 1m makes guide rod be positioned at all the time settlement observation pipe middle part, the anchorage head that guide rod bottommost is tightly connected enters in non-compression soil layer or basement rock, and guide rod top has guide rod seal cover and outlet device; In stainless steel guide rod internal cavities, be provided with tongue tube-resistance sensing element, at the two ends of tongue tube-resistance sensing element, there is fixator fixing seal that tongue tube-resistance sensing element is installed, tongue tube-resistance sensing element can not be moved, each tongue tube-resistance sensing element top is provided with data wire, finally before the outlet device of guide rod top, accumulates a single data cable and draws from outlet device; Stainless steel guide rod is connected with guide rod joint for sealing connecting with common guide rod, between guide rod joint for sealing connecting and guide rod, has sealing ring, and anti-sealing and silt enter guide rod internal cavities.
Described guide rod top has guide rod seal cover and outlet device, and the data wire of described tongue tube-resistance sensing element accumulates a single data cable and drawn with external electric signal reception readout instrument and be connected by outlet device before the outlet device at guide rod top.
Settlement observation pipe can be installed and be embedded in Deep Thick Soft Ground or covering layer soil body the inside, need not expose outside the soil body, and can realize automatic measurement.
Measuring delaminating deposition with the concrete structure that is provided with tongue tube-resistance sensing element in stainless steel guide rod internal cavities is:
1) tongue tube-resistance sensing element is connected on insulating slab and is formed by tongue tube and resistance, two parallel insulating slab both sides of being fixed on of parallel resistor stripe, and mono-section of order of tongue tube 5mm is piecemeal by parallel resistance serial connection;
2) external diameter of stainless steel guide rod is 32mm, cavity internal diameter is not less than the stainless steel tube of the smooth outer surface of 25mm, tongue tube and resistance series connection structure that delaminating deposition is measured are sealed in its internal cavities, upper and lower two ends adopt tongue tube-resistance sensing element fixator fixing seal, and tongue tube-resistance sensing element can not be moved in guide rod; Guide rod length 2m/ root, tongue tube-resistance sensing element length 1m/ root, tongue tube-resistance sensing element upper end is provided with data wire;
3) magnet ring adopts pawl formula fixed structure and the outer soil body of settlement observation pipe to be connected to the integral body of synchronous shift, during soil body compressive strain, magnet ring is subjected to displacement variation along sedimentation pipe, magnet ring connects after being displaced to the magnetic attracting that tongue tube reed in the stainless steel guide rod of position is subject to magnet ring, circuit pathways, receives readout instrument by sensor signal and can record the now resistance value of path; Because tongue tube in the tongue tube of tongue tube-resistance-type in stainless steel guide rod and resistance series connection structure is uniform with 5mm spacing, its settlement measurement precision is 5mm;
4) to accept readout instrument be special-purpose readout instrument to sedimentation signal, output voltage 0～5V.
In other words, the solution of the present invention is: the equipment body of measuring Deep Thick Soft Ground or covering layer delaminating deposition is to be embedded in tongue tube-resistance sensing element in the stainless steel guide rod of certain depth location in peephole and the magnet ring outside settlement observation pipe, magnet ring and the soil body are combined closely, when outside soil body generation sedimentation, drive magnet ring to be subjected to displacement variation, the tongue tube of the tongue tube-resistance sensing element in the magnetic attracting stainless steel guide rod of magnet ring, by the change in displacement of measured resistance value variation sensing magnet ring; The survey data line of delaminating deposition accumulates a single data cable and draws the guide rod mouth of pipe by outlet device before the outlet device of guide rod top, outside by being placed in the peephole soil body after drawing in settlement observation protection of pipe lid lateral aperture; During measurement, by sensor signal, receive the direct reading of readout instrument and obtain magnet ring elevation, thereby record the change in displacement of magnet ring position.The apparatus of this measurement Deep Thick Soft Ground or covering layer delaminating deposition mainly comprises settlement observation pipe, magnet ring, common guide rod, stainless steel guide rod, guide rod centering rubber ring, the tongue tube-resistance sensing element that is sealed in stainless steel guide rod inside, sensor signal reception readout instrument, guide rod end sealing lid and outlet device.
By boring in advance, bury the common and stainless steel guide rod that connects anchorage head underground, guide rod overlaps a guide rod centering rubber ring every 1m makes guide rod be positioned at all the time settlement observation pipe middle part, in stainless steel guide rod, be sealed and installed with tongue tube-resistance sensing element, be placed in the position that will measure delaminating deposition, tongue tube for two ends-resistance sensing element fixator fixing seal, data wire accumulates a single data cable and draws from outlet device before the outlet device at guide rod top; It is outside that magnet ring is placed on settlement observation pipe, along with soil movement slides along sedimentation pipe.Novel measuring technique of the present invention only need be installed and be buried Deep Thick Soft Ground or covering layer top underground when installation is buried underground, and do not need settlement observation pipe to install always, do not bury underground outside backfill, to realize by sensor signal, receive the object that readout instrument records Deep Thick Soft Ground or covering layer delaminating deposition automatically.
The technical scheme that completes the 2nd invention task of the application is: equipment and the method to set up thereof of above-mentioned measurement Deep Thick Soft Ground or covering layer delaminating deposition, it is characterized in that, and step is as follows:
1) need to carry out the position boring of Deep Thick Soft Ground or covering layer delaminating deposition deformation measurement; The degree of depth of Deep Thick Soft Ground suggestion boring reaches weak soil bottom and is not subject to lower 3 meters of the non-compression soil layer that upper load affects, dark 3 meters than basement rock of the degree of depth of dam foundation covering layer suggestion boring, make fine non-compression soil layer and the dam foundation covering layer bottom basement rock inside that anchors to soft foundation of anchorage head, and boring will be cleaned up before installing;
2) at the outside settlement observation pipe of installing of guide rod, guide rod overlaps a guide rod centering rubber ring every 1m makes guide rod be positioned at all the time settlement observation pipe middle part, settlement observation pipe has one section to be closely connected with anchorage head, in the place that will measure delaminating deposition, stainless steel guide rod is installed, and from settlement observation pipe outer tip end 1/3 place of measuring delaminating deposition, magnet ring being installed, mounted guide rod and sedimentation pipe are put into the hole of having bored;
3) at the guide rod mouth of pipe, during apart from about 50cm left and right, aperture, outside hole, adopt temporary fixture to fix guide rod, guide rod can not freely be moved up and down in hole;
4) guide rod joint for sealing connecting is installed;
5) again next joint guide rod is installed and is fixed on joint for sealing connecting joint, tighten;
6) taut wire, unclamps fixture, and next joint settlement observation pipe is installed, and settlement observation pipe is than the short 50cm of mounted guide rod;
7) unclamp steel wire, slowly guide rod and settlement observation pipe are put into hole;
8) repeating step 2)-step 7), until guide rod and settlement observation pipe reach predetermined burial place;
9) guide rod is installed and has been buried rear top employing guide rod seal cap sealing underground, and survey data cable is drawn from outlet device;
10) settlement observation protection of pipe lid is installed, between settlement observation pipe and hole wall backfill closely knit, magnet ring and the soil body are combined closely, magnet ring embeds in the soil body firmly.
The prioritization scheme of above method is, in step 2) increase above in steps 2)-1: in guide rod bottom, anchorage head is installed, anchorage head and common guide rod are to adopt to be tightly connected, on anchorage head threaded hole of steel, wear a steel wire, the many 3 meters of left and right of the Length Ratio hole depth of steel wire, steel wire the outside is fixed on a firm thing.
The present invention has improved conventional delaminating deposition measurement sedimentation pipe must install the technological deficiency of burying underground outside the measurement soil body and can only manually drawing the measurement of delaminating deposition readout instrument cable, can be by the tongue tube of the tongue tube-resistance sensing element in the magnetic attracting stainless steel guide rod of magnet ring, by the change in displacement of measured resistance value reaction magnetic ring, measure Deep Thick Soft Ground or tectal delaminating deposition, reach without settlement observation pipe and draw the metering system outside the soil body, and can realize automatic measurement.
Measurement Deep Thick Soft Ground proposed by the invention or the equipment of covering layer delaminating deposition are convenient to be installed, measures simply, and can realize automatic measurement.
Accompanying drawing explanation
Fig. 1 is the equipment constructional drawing that the present invention measures Deep Thick Soft Ground or covering layer delaminating deposition.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and concrete case study on implementation, the inventive method is described in further detail.Concrete case study on implementation described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1, measures equipment and the method to set up thereof of Deep Thick Soft Ground or covering layer delaminating deposition.
With reference to Fig. 1: need to carry out the position boring of Deep Thick Soft Ground or covering layer delaminating deposition deformation measurement; In soft foundation, the degree of depth of suggestion boring reaches weak soil bottom and is not subject to lower 3 meters of the non-compression soil layer that upper load affects, in dam foundation covering layer, advise drilling depth than basement rock dark 3 meters, make fine non-compression soil layer or the dam foundation basement rock inside that anchors to weak soil of anchorage head 7, and boring will be cleaned up before installing; According to on-the-spot geology and design conditions, determine magnet ring 4 and be sealed in the tongue tube-resistance sensing element 5 buried depth positions in stainless steel guide rod 2.
In common guide rod 3 bottoms, anchorage heads 7 are installed, anchorage head 7 and common guide rod 3 are to be tightly connected, and wear a steel wire on anchorage head threaded hole of steel 13, the many 3 meters of left and right of Length Ratio hole depth of steel wire, and steel wire the outside is fixed on a firm thing; And at the outside settlement observation pipe 1 of installing of guide rod, guide rod is every 1 guide rod centering rubber ring 14 of 1m cover, anchorage head 3 has one section to be closely connected with settlement observation pipe 1; In the place that will measure delaminating deposition, stainless steel guide rod 2 is installed, guide rod is every 1 guide rod centering rubber ring 14 of 1m cover simultaneously, and from settlement observation pipe 1 outer tip end 1/3 place of measuring delaminating deposition, magnet ring 4 being installed, mounted guide rod is put into the hole of having bored; At the guide rod mouth of pipe, during apart from about 50cm left and right, aperture, outside hole, adopt temporary fixture to fix guide rod, guide rod can not freely be moved up and down in hole; Guide rod joint for sealing connecting 6 is installed; Again next joint guide rod is installed and is fixed on joint for sealing connecting joint 6, tighten; Taut wire, unclamps fixture, and next joint settlement observation pipe 1 is installed, and settlement observation pipe 1 is than the short 50cm of mounted guide rod; Unclamp steel wire, slowly guide rod and settlement observation pipe 1 are put into hole;
Repeat to install common guide rod 3 and stainless steel guide rod 2 and settlement observation pipe 1, until guide rod and settlement observation pipe 1 reach predetermined burial place.
Guide rod and settlement observation pipe 1 are installed and have been buried 9 sealings of back-guiding rod top employing guide rod seal cover underground, and sensor data cable 11 accumulates a single data cable and draws from outlet device 12 before the outlet device of guide rod top; At settlement observation pipe 1 top, with sedimentation pipe over cap 10 protection settlement observation pipes 1, sensing data cable covers 10 lateral aperture from settlement observation protection of pipe draws the soil body, and access sensor signal receives readout instrument can directly read sedimentation reading.
Between the settlement observation pipe 1 of having buried underground in installation and hole wall, backfill is closely knit, and magnet ring 4 and the soil body are combined closely, and magnet ring 4 embeds in the soil body firmly.
Front tongue tube-resistance the sensing element 5 of equipment Embedment and installation that the present invention measures Deep Thick Soft Ground or covering layer delaminating deposition is installed on stainless steel guide rod 2 inside by tongue tube-resistance sensing element fixator 8 fixing seals, sensor data cable 11 is drawn from tongue tube-resistance sensing element 5 upper ends, finally before the outlet device 12 of guide rod top, accumulates a single data cable.
The equipment that the present invention measures Deep Thick Soft Ground or covering layer delaminating deposition has mainly increased anchorage head 7 and a guide rod from basement rock to covering layer top in settlement observation pipe 1 inside, in the place of measuring delaminating deposition, adopt stainless steel guide rod 2, tongue tube-resistance sensing element 5 has been installed in stainless steel guide rod 2 inside, by the tongue tube of the tongue tube-resistance sensing element 5 in the magnetic attracting stainless steel guide rod 2 of magnet ring 4, thereby realize measurement sedimentation automatically by the change in displacement of measured resistance value reaction magnetic ring.
Claims (10)
1. an equipment of measuring Deep Thick Soft Ground or covering layer delaminating deposition, in boring, be embedded with settlement observation pipe, in this settlement observation pipe, be provided with guide rod, it is characterized in that, described guide rod is formed by connecting by some common guide rods and stainless steel guide rod, wherein, in the place that will measure delaminating deposition, adopt stainless steel guide rod; Described guide rod bottom is provided with anchorage head, and this anchorage head and guide rod are tightly connected, and one of this anchorage head section is closely connected with settlement observation pipe simultaneously; Described guide rod top is provided with guide rod seal cover, and sealing covers and is provided with outlet device; Described stainless steel guide rod inside is provided with tongue tube-resistance sensing element; The data wire of described tongue tube-resistance sensing element accumulates a single data cable before the outlet device at guide rod top, and is connected by described outlet device and external electric signal reception readout instrument; At settlement observation pipe, need the place of measuring delaminating deposition to be set with magnet ring outward.
2. the equipment of measurement Deep Thick Soft Ground according to claim 1 or covering layer delaminating deposition, is characterized in that, on described anchorage head, is provided with threaded hole of steel, is installed with a steel wire on this threaded hole of steel, and steel wire length is than the many 3 meters of left and right of hole depth, and steel wire the outside is fixing.
3. the equipment of measurement Deep Thick Soft Ground according to claim 1 or covering layer delaminating deposition, is characterized in that, described guide rod is every a centering rubber ring of 1m cover.
4. the equipment of measurement Deep Thick Soft Ground according to claim 1 or covering layer delaminating deposition, is characterized in that, described stainless steel guide rod 2m/ root, common guide rod 1m/ root; Described stainless steel guide rod is connected with guide rod joint for sealing connecting with common guide rod; Between guide rod joint for sealing connecting and guide rod, there is sealing ring.
5. the equipment of measurement Deep Thick Soft Ground according to claim 1 or covering layer delaminating deposition, it is characterized in that, at the two ends of described tongue tube-resistance sensing element, there is fixator fixing seal that tongue tube-resistance sensing element is installed, tongue tube-resistance sensing element can not be moved.
6. the equipment of measurement Deep Thick Soft Ground according to claim 1 or covering layer delaminating deposition, is characterized in that, the outer tube mouth of pipe of described settlement observation pipe adopts the protection of sedimentation pipe over cap;
At settlement observation pipe, being set with the position of magnet ring outward, is at settlement observation pipe outer tip end 1/3 place of measuring delaminating deposition.
7. the equipment of measurement Deep Thick Soft Ground according to claim 1 or covering layer delaminating deposition, it is characterized in that, described guide rod top has guide rod seal cover and outlet device, and the data wire of described tongue tube-resistance sensing element accumulates a single data cable and drawn with external electric signal reception readout instrument and be connected by outlet device before the outlet device at guide rod top.
8. according to the equipment of the measurement Deep Thick Soft Ground one of claim 1-7 Suo Shu or covering layer delaminating deposition, it is characterized in that, the concrete structure of described tongue tube-resistance sensing element is: tongue tube-resistance sensing element is connected on insulating slab and is formed by tongue tube and resistance, article two, parallel insulating slab both sides of being fixed on of parallel resistor stripe, mono-section of order of tongue tube 5mm is piecemeal by parallel resistance serial connection; Magnet ring adopts pawl formula fixed structure and the outer soil body of settlement observation pipe to be connected to the integral body of synchronous shift, during soil body compressive strain, sedimentation ring is subjected to displacement variation along sedimentation pipe, magnet ring connects after being displaced to the magnetic attracting that tongue tube reed in the stainless steel guide rod of position is subject to magnet ring, circuit pathways, receives readout instrument by sensor signal and can record the now resistance value of path; Because tongue tube in the tongue tube of tongue tube-resistance-type in stainless steel guide rod and resistance series connection structure is uniform with 5mm spacing, its settlement measurement precision is 5mm; It is special-purpose readout instrument that sedimentation signal is accepted readout instrument, output voltage 0～5V.
9.
the method to set up of the equipment of measurement Deep Thick Soft Ground claimed in claim 1 or covering layer delaminating deposition, is characterized in that, step is as follows:
1) need to carry out the position boring of Deep Thick Soft Ground or covering layer delaminating deposition deformation measurement; The degree of depth of Deep Thick Soft Ground suggestion boring reaches weak soil bottom and is not subject to lower 3 meters of the non-compression soil layer that upper load affects, dark 3 meters than basement rock of the degree of depth of dam foundation covering layer suggestion boring, make fine non-compression soil layer and the dam foundation covering layer bottom basement rock inside that anchors to soft foundation of anchorage head, and boring will be cleaned up before installing;
2) at the outside settlement observation pipe of installing of guide rod, guide rod overlaps a guide rod centering rubber ring every 1m makes guide rod be positioned at all the time settlement observation pipe middle part, settlement observation pipe has one section to be closely connected with anchorage head, in the place that will measure delaminating deposition, stainless steel guide rod is installed, and from settlement observation pipe outer tip end 1/3 place of measuring delaminating deposition, magnet ring being installed, mounted guide rod and sedimentation pipe are put into the hole of having bored;
3) at the guide rod mouth of pipe, during apart from about 50cm left and right, aperture, outside hole, adopt temporary fixture to fix guide rod, guide rod can not freely be moved up and down in hole;
4) guide rod joint for sealing connecting is installed;
5) again next joint guide rod is installed and is fixed on joint for sealing connecting joint, tighten;
6) taut wire, unclamps fixture, and next joint settlement observation pipe is installed, and settlement observation pipe is than the short 50cm of mounted guide rod;
7) unclamp steel wire, slowly guide rod and settlement observation pipe are put into hole;
8) repeating step 2)-step 7), until guide rod and settlement observation pipe reach predetermined burial place;
9) guide rod is installed and has been buried rear top employing guide rod seal cap sealing underground, and survey data cable is drawn from outlet device;
10) settlement observation protection of pipe lid is installed, between settlement observation pipe and hole wall backfill closely knit, magnet ring and the soil body are combined closely, magnet ring embeds in the soil body firmly.
10. the method to set up of the equipment of measurement Deep Thick Soft Ground according to claim 9 or covering layer delaminating deposition, it is characterized in that, in step 2) increase above in steps 2)-1: in guide rod bottom, anchorage head is installed, anchorage head and common guide rod are to adopt to be tightly connected, on anchorage head threaded hole of steel, wear a steel wire, the many 3 meters of left and right of the Length Ratio hole depth of steel wire, steel wire the outside is fixed on a firm thing.
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| CN201410201969.5A CN103953025B (en) | 2014-05-13 | 2014-05-13 | Measure equipment and the method to set up thereof of Deep Thick Soft Ground or covering layer delaminating deposition |
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| CN112411513A (en) * | 2020-10-26 | 2021-02-26 | 机械工业勘察设计研究院有限公司 | Soil layered settlement monitoring device and method |
| CN114279400A (en) * | 2021-12-20 | 2022-04-05 | 水利部交通运输部国家能源局南京水利科学研究院 | Automatic monitoring device and method for internal settlement and foundation deformation of damming dam |
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| CN116804546A (en) * | 2023-08-22 | 2023-09-26 | 天津市北洋水运水利勘察设计研究院有限公司 | Magnetic induction type resistor grid layered displacement monitoring method and system |
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