CN115247413B

CN115247413B - Optical fiber sensing measuring ring for soil body layered settlement

Info

Publication number: CN115247413B
Application number: CN202110466348.XA
Authority: CN
Inventors: 洪成雨; 陈湘生; 苏栋; 檀俊坤; 熊昊; 沈翔
Original assignee: Shenzhen University
Current assignee: Shenzhen University
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2023-07-21
Anticipated expiration: 2041-04-28
Also published as: CN115247413A

Abstract

The invention discloses a soil body layered settlement optical fiber sensing measuring ring which comprises an annular sleeve, wherein a magnet ring used for triggering a settlement meter probe magnetic induction element is embedded in the inner pipe wall of the annular sleeve, a plurality of support rods are arranged at intervals in the inner ring of the annular sleeve, an installation cavity is arranged in the annular sleeve, an arc-shaped plate is rotationally connected in the installation cavity, a notch communicated with the installation cavity is arranged on the outer side of the annular sleeve, and the arc-shaped plate can rotationally extend out through the notch. According to the invention, the oval turntable is rotated, the long shaft of the oval turntable ejects the sliding rod outwards, and the sliding rod stretches into the jack to limit, so that the annular sleeve cannot displace along with the downward movement of the hollow sedimentation pipe and is suitable for a soil layer with insufficient water content, and deformation generated by expansion of the arc plate can be reduced, and the measured sedimentation amount is more approximate to a theoretical value.

Description

Optical fiber sensing measuring ring for soil body layered settlement

Technical Field

The invention relates to the technical field of civil engineering monitoring equipment, in particular to an optical fiber sensing measuring ring for soil mass layered settlement.

Background

The monitoring of soil mass layered settlement is a monitoring method for measuring the vertical displacement of the soil mass commonly used at present. The method is widely used for monitoring the vertical displacement of the stratum in slope, tunnel, road construction and the like. The soil body layered settlement is usually monitored by adopting a settlement measuring instrument, and a measuring system of the settlement measuring instrument mainly comprises a probe sensitive to magnetic materials, a scale with scales, an inductance detecting device, and a settlement magnetic ring and a settlement pipe which are buried in a soil layer. The sedimentation pipe is generally made of flexible plastic pipes, a sedimentation magnetic ring is sleeved outside the sedimentation pipe at certain intervals, and the sedimentation magnetic ring is driven to synchronously sink when the stratum is settled. When the probe slowly descends from the drill hole and encounters a sedimentation magnetic ring pre-buried in the drill hole, the buzzer on the inductance detection device can make a sound, and at the moment, the distance between the position of the sedimentation magnetic ring and the hole can be calculated according to the scale of the scale on the hole. And obtaining the displacement change condition of each stratum along with time by comparing the change of the position of each annular sleeve along with time.

In practical application, the traditional sedimentation ring is large in soil pressure, and the transverse contact area of the anchoring iron sheet and the soil is large, so that the anchoring iron sheet cannot be fully spread, and cannot be anchored in the soil layer to be measured, and the sedimentation ring cannot sink along with the soil layer to be measured, so that the measurement result is influenced.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides an optical fiber sensing measuring ring for soil body layered settlement, so that the problems in the prior art are solved.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a soil body layering subsides optic fibre response measuring ring, includes the ring sleeve, the intraductal pipe wall embedding of ring sleeve is provided with the magnet circle that is used for triggering subsidence appearance probe magnetic induction element, ring sleeve inner circle interval sets up a plurality of bracing pieces, the inside installation cavity that is equipped with of ring sleeve, the arc is connected in the installation cavity rotation, the ring sleeve outside is equipped with the notch of intercommunication installation cavity, the arc can have the notch rotation to stretch out.

Preferably, the arc is equipped with and accomodates the chamber, accomodate one side inner wall sliding connection arc strip that the chamber is close to arc outer arc, outer arc one side of arc is equipped with dodges the groove, the outer arc of arc strip sets up the sawtooth, the sawtooth is stretched out by dodging the groove, arc one side is equipped with the push rod, the push rod drives the arc strip and reciprocates on accomodating the inner wall in chamber.

Preferably, the installation cavity is internally and fixedly connected with an arc plate, a plurality of protruding blocks are arranged on the inner cambered surface of the arc plate at intervals, the end head of the push rod is rotationally connected with a roller, and a first spring is arranged between the installation plate of the roller and the arc plate.

Preferably, the first bevel gear of fixed connection in the pivot of arc, the lateral wall in installation cavity rotates and connects the drive shaft, the end fixed connection second bevel gear of drive shaft, the second bevel gear meshes with first bevel gear mutually, the bottom in installation cavity is equipped with the sliding hole, sliding connection square pole in the sliding hole, fixed connection supporting spring between square pole and the hole bottom in sliding hole, square pole upper end one side fixed connection pinion rack, the middle part fixed connection drive gear of drive shaft, drive gear meshes with the pinion rack mutually.

Preferably, the inner wall of the annular sleeve is provided with a sliding groove, the sliding groove is communicated with the sliding hole, a supporting rod is connected in a sliding mode in the sliding groove, and the supporting rod is fixedly connected with the square rod.

The invention has the advantages that: according to the soil body layered settlement optical fiber sensing measuring ring provided by the invention, the soil body layered settlement is embedded into the soil layer through the rotation of the arc plate, the soil body layered settlement is measured, in the process of rotating the arc plate, the roller rolls on the arc plate, the arc strip reciprocates through the cooperation of the convex block and the first spring, sawing is formed on the soil layer, the resistance of the arc plate embedded into the soil layer is reduced, and the smooth construction is ensured.

Drawings

FIG. 1 is a schematic view of the basic structure of the present invention;

FIG. 2 is a schematic view of the structure of the arc plate of the present invention after being unfolded;

FIG. 3 is a partial enlarged view at G in FIG. 2;

FIG. 4 is an enlarged view of a portion at H in FIG. 3;

FIG. 5 is a schematic view of the connection structure of the arcuate plate of the present invention;

FIG. 6 is a schematic view of the rotation principle of the arc plate in the invention

FIG. 7 is a schematic diagram of the working principle of the present invention;

FIG. 8 is an enlarged view of a portion at E in FIG. 7;

FIG. 9 is a schematic view of a touch bar according to the present invention;

fig. 10 is a partial enlarged view at F in fig. 9;

FIG. 11 is a cross-sectional view A-A of FIG. 10;

FIG. 12 is a schematic view of the connection structure of hollow sedimentation tube and touch bar in the present invention;

fig. 13 is a schematic plan view of a trench in the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1-13, the optical fiber sensing measuring ring for soil body layered settlement provided by the invention comprises an annular sleeve 2, wherein a magnet ring 21 for triggering a magnetic induction element of a settlement meter probe is embedded in the inner pipe wall of the annular sleeve 2, a plurality of support rods 22 are arranged at intervals on the inner ring of the annular sleeve 2, a mounting cavity 23 is arranged in the annular sleeve 2, an arc plate 24 is rotationally connected in the mounting cavity 23, a notch 25 communicated with the mounting cavity 23 is arranged on the outer side of the annular sleeve 2, the arc plate 24 can rotationally extend out from the notch 25, and the arc plate 2 is rotationally embedded into a soil layer to measure soil body layered settlement;

the arc plate 24 is provided with a storage cavity 241, one side inner wall of the storage cavity 241, which is close to the outer arc of the arc plate 24, is slidably connected with an arc strip 242, one side of the outer arc of the arc plate 24 is provided with a avoidance groove 243, the outer arc surface of the arc strip 242 is provided with saw teeth 244, the saw teeth 244 extend out of the avoidance groove 243, one side of the arc plate 24 is provided with a push rod 245, and the push rod 245 drives the arc strip 242 to slide back and forth on the inner wall of the storage cavity 241; the arc plate 246 is fixedly connected in the mounting cavity 23, a plurality of protruding blocks 247 are arranged at intervals on the inner cambered surface of the arc plate 246, the end heads of the push rods 245 are rotationally connected with the rollers 248, first springs 249 are arranged between the mounting plates of the rollers 248 and the arc plate 24, the rollers 248 roll on the arc plate 246 in the rotating process of the arc plate 24, the arc strips 242 reciprocate through the cooperation of the protruding blocks 247 and the first springs 249, sawing is performed on a soil layer, and resistance of the arc plate 24 embedded into the soil layer is reduced;

the invention is used for subsidence monitoring device, this monitoring device includes the hollow subsidence tube 1, the outer lane of the hollow subsidence tube 1 regards hollow subsidence tube 1 as the annular array of benchmark to connect a plurality of optic fibre sensors 30 fixedly, optic fibre sensor 30 is the prior art, its basic working principle is that the light from light source is sent into modulator through optic fibre, after making the parameter to be measured interact with light entering the modulating area, cause the optical property of light (such as intensity, wavelength, frequency, phase place, polarization state of light, etc.) to change, refer to as modulated signal light, and then utilize the influence exerted by transmission characteristic of light measured, finish measuring, the outside of optic fibre sensor 30 is fixedly connected with the rubber sleeve, the rubber sleeve can be deformed together with its internal optic fibre sensor 30, the outside of the rubber sleeve has spiral groove, the spiral groove of the rubber sleeve is convenient for and the soil body is jogged closely, a plurality of annular sleeve 2 are sleeved on the outer lane of the hollow subsidence tube 1, the annular sleeve 1 outer wall of the hollow subsidence tube corresponds to annular sleeve 2 annular array of sets up the square groove 11, every square groove 11 is all communicated with the inner cavity setting of the hollow subsidence tube 1, every bracing piece 22 of the hollow subsidence tube is stretched into the hollow subsidence tube 1 by its correspondent square groove 11;

the first bevel gear 41 is fixedly connected to the rotating shaft of the arc plate 24, the side wall of the installation cavity 23 is rotationally connected with the driving shaft 42, the end of the driving shaft 42 is fixedly connected with the second bevel gear 43, the second bevel gear 43 is meshed with the first bevel gear 41, a sliding hole is formed in the bottom of the installation cavity 23, the square rod 44 is connected in a sliding mode in the sliding hole, a supporting spring 45 is fixedly connected between the square rod 44 and the hole bottom of the sliding hole, one side of the upper end of the square rod 44 is fixedly connected with the toothed plate 46, the middle part of the driving shaft 42 is fixedly connected with the driving gear 47, the driving gear 47 is meshed with the toothed plate 46, a sliding groove 48 is formed in the inner wall of the annular sleeve 2, the sliding groove 48 is communicated with the sliding hole, a supporting rod 49 is connected in a sliding mode, one end of the supporting rod 49 extends into the inner tube of the hollow sedimentation tube 1.

The electric motor driving device further comprises a control rod 5, the control rod 5 pushes the supporting rod 49 to move downwards, the driving shaft 4 is driven to rotate through the toothed plate 46, the arc plate 24 is unfolded through the transmission of the second bevel gear 43 and the first bevel gear 41, and compared with the prior art, the electric motor driving device is driven to rotate through a contact touch switch, the electric motor driving device does not need complex line arrangement and protection measures, achieves the purpose through simple mechanism pushing, and is simple and firm to operate.

The control rod 5 comprises a hollow rod body 51, an operating rod 52 is coaxially arranged in the rod body 51, an annular groove 53 is formed in the inner wall of the rod body 51, an oval rotary disc 54 is mounted on the operating rod 52, a hand wheel 58 is fixedly connected to the upper end of the operating rod 52, the oval rotary disc 54 is rotationally connected in the annular groove 53, two sliding holes are respectively formed in two ends of the annular groove 53, a sliding rod 55 is slidingly connected in each sliding hole, a boss is arranged at one end, close to the oval rotary disc 54, of each sliding rod 55, the boss is arranged in contact with the outer ring surface of the oval rotary disc 54, a second spring 56 is mounted between the boss and the inner wall of the annular groove 53, a jack 57 is arranged at the end of each supporting rod 22, the jack 57 is matched with the sliding rod 55, in order to prevent the whole annular sleeve 2 from being displaced in the process of pushing the supporting rod 49, the sliding rod 55 is outwards ejected by rotating the long shaft of the oval rotary disc 54, the sliding rod 55 stretches into the jack 57 to be limited, the annular sleeve 2 does not displace along with the hollow sedimentation tube 1, and is suitable for a water content insufficient soil layer, and meanwhile, the annular sleeve 2 does not displace, so that the deformation generated in the unfolding process of the arc 24 is reduced, and the deformation value is closer to the theoretical deformation value measured.

The operating rod 52 comprises square rod sections 522 of round rod sections 521 which are alternately arranged, a square hole penetrating through is formed in the middle of the oval rotary disc 54, the square rod sections 522 of the operating rod 52 penetrate through the square hole and are in sliding connection, a plurality of through grooves 523 are formed in the outer circle of the rod body 51, the through grooves 523 are arranged in one-to-one correspondence with the square grooves 11, the square rod sections 522 of the operating rod 52 are fixedly connected with a plurality of pressing rods 524, each pressing rod 524 is correspondingly used for controlling one arc plate 24, a reset spring 525 is fixedly connected between the lower end of the round rod section 521 and the upper side of the oval rotary disc 54, after the sliding rod 55 stretches into the jack 57 to limit, the operating rod 52 is pushed downwards, and the pressing rods 524 on the square rod sections 522 of the operating rod 52 push down the supporting rods 49.

The upper end of the rod body 51 is fixedly connected with the round table 59, the diameter of the round table 59 is larger than that of the hollow sedimentation tube 1, a mark line corresponding to the position of the marking support rod 49 is arranged at the upper end of the hollow sedimentation tube 1, an alignment line is arranged at the upper side of the round table 59, lubricating grease is smeared on the pipe orifice of the hollow sedimentation tube 1, two cushion blocks are symmetrically placed at the upper end of the hollow sedimentation tube 1, the height of each cushion block is 50-100mm, the rod body 51 keeps away from the position of the support rod 49 through the reference mark line and is placed all the time, after the round table 59 at the upper end of the rod body 51 contacts the upper end of the hollow sedimentation tube 1, the rod body 51 is rotated to enable the alignment line arranged at the upper side of the round table 59 to be aligned with the mark line, at the moment, the compression bar 524 is located right above the support rod 49, and the cushion blocks are removed and then installed in place.

The inner wall of the upper end of the hollow sedimentation tube 1 is provided with a clamping groove 6, the bottom of the round table 59 is provided with a clamping plate 7, the clamping plate 7 is matched with the clamping groove 6, the round table 59, the clamping plate 7 and the clamping groove 6 form positioning on the position of the control rod 5 in the hollow sedimentation tube 1, so that the pressure rod 524 can align with the supporting rod 49, and the expansion of the arc plate 24 is prevented from being influenced by dislocation.

During operation, the stratum is punched and the hollow sedimentation tube 1 is vertically buried in the stratum, namely, a monitoring hole is drilled at the position to be measured, the depth of the monitoring hole reaches the position of the rigid stratum and an inserting hole is formed in the rigid stratum, a plurality of radial grooves 40 are excavated on the surface of the stratum by taking the monitoring hole as a reference, the hollow sedimentation tube 1 is placed in the monitoring hole, the optical fiber sensor 30 corresponds to the grooves 40, backfill is filled in the grooves 40, the lower end of the hollow sedimentation tube 1 is embedded in the inserting hole of the rigid stratum, the hollow sedimentation tube 1 cannot be settled to form a reference, the control rod 5 is positioned in the hollow sedimentation tube 1 at the moment, the long shaft of the oval turntable 54 ejects the sliding rod 55 outwards, the sliding rod 55 stretches into the inserting hole 57 to limit, the annular sleeve 2 cannot displace along with the hollow sedimentation tube 1 to be suitable for the soil layer with insufficient water content, and deformation generated by expansion of the arc 24 can be reduced, so that the measured settlement amount is closer to a theoretical value.

Pushing down the operating lever 52, the strut 49 is pushed down by the pressure bar 524 on the square bar section 522 of the operating lever 52, pushing down the strut 49 by the control lever 5, and driving the driving shaft 4 to rotate by the toothed plate 46, and the arc plate 24 is unfolded by the transmission of the second bevel gear 43 and the first bevel gear 41.

Rotating the oval rotary disc 54, leaving the sliding rod 55 from the jack 57, then removing the control rod 5, manually placing the magnetic induction measuring head end of the special measuring tape into the hollow sedimentation tube 1, holding the flexible tape to enable the magnetic induction measuring head to slowly move downwards, and when the magnetic induction measuring head reaches the embedded position of the annular sleeve 2 in the soil layer, sounding a buzzer in a receiver, at the moment, manually reading the depth dimension of the special measuring tape at the mouth of the hollow sedimentation tube 1, so that the settlement of the soil layer where the annular sleeve 2 is located in the time period can be calculated.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a soil body layering subsides optic fibre response measuring ring, includes annular sleeve (2), annular sleeve (2) inner tube wall embedding is provided with magnet circle (21) that are used for triggering the subsidence meter probe magnetic induction component, its characterized in that: the inner ring of the annular sleeve (2) is provided with a plurality of supporting rods (22) at intervals, a mounting cavity (23) is formed in the annular sleeve (2), the mounting cavity (23) is rotationally connected with an arc-shaped plate (24), the outer side of the annular sleeve (2) is provided with a notch (25) communicated with the mounting cavity (23), and the arc-shaped plate (24) can rotationally extend out through the notch (25);

the arc plate (24) is provided with a storage cavity (241), one side inner wall of the storage cavity (241) close to the outer arc of the arc plate (24) is slidably connected with an arc strip (242), one side of the outer arc of the arc plate (24) is provided with an avoidance groove (243), the outer arc surface of the arc strip (242) is provided with saw teeth (244), the saw teeth (244) extend out of the avoidance groove (243), one side of the arc plate (24) is provided with a push rod (245), and the push rod (245) drives the arc strip (242) to slide back and forth on the inner wall of the storage cavity (241);

the installation cavity (23) is internally and fixedly connected with an arc plate (246), a plurality of protruding blocks (247) are arranged on the inner arc surface of the arc plate (246) at intervals, the end of the push rod (245) is rotationally connected with a roller (248), and a first spring (249) is arranged between the installation plate of the roller (248) and the arc plate (24).

2. The soil mass layered settlement optical fiber sensing measurement ring according to claim 1, wherein: the rotary shaft of the arc plate (24) is fixedly connected with a first bevel gear (41), the side wall of the installation cavity (23) is rotationally connected with a driving shaft (42), the end of the driving shaft (42) is fixedly connected with a second bevel gear (43), the second bevel gear (43) is meshed with the first bevel gear (41), the bottom of the installation cavity (23) is provided with a sliding hole, a square rod (44) is connected in a sliding mode in the sliding hole, a supporting spring (45) is fixedly connected between the square rod (44) and the hole bottom of the sliding hole, one side of the upper end of the square rod (44) is fixedly connected with a toothed plate (46), the middle part of the driving shaft (42) is fixedly connected with a driving gear (47), and the driving gear (47) is meshed with the toothed plate (46).

3. The soil mass layered settlement optical fiber sensing measurement ring according to claim 1, wherein: the inner wall of the annular sleeve (2) is provided with a sliding groove (48), the sliding groove (48) is communicated with the sliding hole, a supporting rod (49) is connected in a sliding mode in the sliding groove (48), and the supporting rod (49) is fixedly connected with the square rod (44).