AU2021398759A1 - Device for monitoring soil displacement by means of hydraulic burying, and use method thereof - Google Patents
Device for monitoring soil displacement by means of hydraulic burying, and use method thereof Download PDFInfo
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- AU2021398759A1 AU2021398759A1 AU2021398759A AU2021398759A AU2021398759A1 AU 2021398759 A1 AU2021398759 A1 AU 2021398759A1 AU 2021398759 A AU2021398759 A AU 2021398759A AU 2021398759 A AU2021398759 A AU 2021398759A AU 2021398759 A1 AU2021398759 A1 AU 2021398759A1
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- optical fiber
- fiber cable
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- soil
- hydraulic
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- 239000002689 soil Substances 0.000 title claims abstract description 79
- 238000012544 monitoring process Methods 0.000 title claims abstract description 55
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 167
- 239000010959 steel Substances 0.000 claims abstract description 167
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 125
- 239000013307 optical fiber Substances 0.000 claims abstract description 118
- 230000035515 penetration Effects 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Analytical Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Disclosed in the present invention are a device for monitoring soil displacement by means of hydraulic burying, and a use method thereof. The device comprises a hydraulic apparatus, a pointed cone steel member, and a sleeve, and also comprises a water delivery pipe, a mud suction pipe, and an optical fiber cable which are in the sleeve. The device breaks soil on the contact surface of the pointed cone steel member by using a high-pressure water jet sprayed by the hydraulic apparatus through water flow channels, so as to form mud, and the mud suction pipe suctions the mud to the soil surface, such that the technical problem that the soil penetration depth of a monitoring apparatus in a hard soil area is too small to monitor soil displacement is solved; a detachable sleeve and a slotted optical fiber cable slot are used to facilitate the placement of the optical fiber cable into the device and ensure that the optical fiber cable at a horizontal position of adjacent sides is not affected during the mounting and removal of the sleeve and the hydraulic apparatus. Therefore, one optical fiber cable can be buried in a plurality of monitoring points, and soil displacement at the plurality of monitoring points can be measured using one optical fiber demodulator, thereby reducing labor and costs.
Description
[0001] The present invention relates to the field of geotechnical engineering, and in particular to a device for monitoring soil displacement by means of hydraulic burying and a use method thereof.
[0002] At present, inclinometers are used to monitor soil displacements in engineering. The main measurement components of inclinometers are using fluxgate sensors or mechanical gyroscopes as angular velocity sensors combined with accelerometers to measure azimuth angles and tilt angles. The use of this inclinometer requires pre-drilling into the inclinometer tube, and the installation process is cumbersome. Each monitoring point needs to be manually measured and read for each monitoring, which cannot be monitored in real time and automatically, and the inclinometer is expensive.
[ 0003] Distributed optical fiber sensing technology is a new technology that has gradually emerged in engineering projects in China and abroad in recent years. With its advantages of full distribution, quasi-real-time, anti-interference, and high durability, it has become a hot technology in the current research on monitoring rock and soil. After retrieval, a Chinese invention patent application with a title of "DEVICE FOR MONITORING LATERAL DISPLACEMENT OF SOIL IN SITU AND USING METHOD OF DEVICE" discloses a device for monitoring lateral displacement of soil in situ, the application is filed on February 3, 2019 and the publication number is CN109655001A. The device penetrates the steel strip adhered to the optical fiber into the soil through the hydrostatic penetration machine, and the soil penetration depth is shallow in areas with good soil quality. However, in the hard soil areas, the device cannot achieve the objective of monitoring the soil displacement due to the shallow soil penetration depth of the apparatus. Therefore, a device for monitoring the soil displacement in the hard soil areas is urgently needed.
[0004] In order to solve the above problems, the present invention provides a device for monitoring soil displacement by means of hydraulic burying and a use method thereof. In the present invention, the high-pressure water flow injected by the hydraulic apparatus is used to disperse the soil and form a mud, and the mud is sucked onto the earth surface through the mud suction pipe, so as to solve the technical problem that the device for monitoring the soil displacement cannot monitor the soil displacement at a shallow soil penetration depth in the hard soil area.
[ 0005] In order to achieve the above objective, a technical solution is adopted in the present invention.
[ 0006] A device for monitoring soil displacement by means of hydraulic burying includes a sleeve, a hydraulic apparatus and a pointed cone steel member. An upper end of the hydraulic apparatus is fixedly connected to the sleeve, and a lower end is connected with the pointed cone steel member by contact pressure.
[ 0007] Water inlet channels that penetrate to the bottom are arranged on both sides inside the hydraulic apparatus, a mud channel that penetrates to the bottom is arranged in the middle, the water inlet channels are configured to connect water delivery pipes, and the mud channel is configured to connect a mud suction pipe; optical fiber cable slots that penetrate to the bottom are respectively provided between the two water inlet channels and the mud channel, and the optical fiber cable slots are configured to place an optical fiber cable; two front and rear opposite openings are arranged at the bottom end of the hydraulic apparatus, and the openings are located between the two optical fiber cable slots and are configured to suck a mud into the mud channel; water flow channels corresponding to the positions of the water inlet channels and penetrating to the bottom and a U-shaped optical fiber cable slot corresponding to the positions of the optical fiber cable slots are arranged on both sides inside the pointed cone steel member; and the sleeve is configured to encapsulate and protect the optical fiber cable, the water delivery pipes and the mud suction pipe.
[0008] Furthermore, the pointed cone steel member is formed by a cone tip and a limiting block, the limiting block is arranged on a top plane end of the cone tip, and the water flow channels penetrate the limiting block and the cone tip; limiting slots are arranged at the bottom end of the hydraulic apparatus, and the limiting slots and the limiting block connect the pointed cone steel member with the hydraulic apparatus by contact pressure; the U-shaped optical fiber cable slot is arranged in the middle of the limiting block, and the U-shaped optical fiber cable slot is located between the two water flow channels, a U-shaped inserted block is inserted into the U-shaped optical fiber cable slot and configured to fix the optical fiber cable.
[ 0009] Furthermore, the upper end of the flow channel is conical, and the lower end is cylindrical. The bottom end of the inlet channel is equipped with a conical high-pressure water nozzle, which is embedded in the upper end of the flow channel.
[0010] Moreover, a mud suction nozzle is sleeved on a bottom end of the mud channel, atop end of the mud suction nozzle has a circular interface, and the bottom end of the mud suction nozzle has a slot corresponding to the positions of the openings at the bottom end of the hydraulic apparatus, the circular interface illustrated is sleeved on the bottom end of the mud channel, and the slot openings illustrated are aligned to the openings at the bottom end of the hydraulic apparatus.
[ 0011] In addition, water pipe connectors are arranged on upper ends of the water inlet channels, a mud suction pipe connector is arranged on an upper end of the mud channel, the water delivery pipes and the water pipe connectors are detachably connected with each other, and the mud suction pipe and the mud suction pipe connector are detachably connected with each other; the sleeve consists of a pair of C-shaped channel steels and a pair of connecting steel plates, and the opening ends of the C-shaped channel steels in the pair of C-shaped channel steels are opposite to each other, the number of the pairs of C-shaped channel steels is N and the pairs of C-shaped channel steels are arranged in a straight line from bottom to top, and N is a natural number greater than 1; the adjacent pairs of C-shaped channel steels are bridged with each other by the connecting steel plates and the opening ends of the pairs of C-shaped channel steels are closed; fixing pieces are arranged at four corners on the top end of the hydraulic apparatus, the fixing pieces are connected with the bottom pair of C-shaped channel steels and the pair of connecting steel plates by bolts to fixedly connect the upper end of the hydraulic apparatus with the sleeve.
[ 0012] Additionally, a plurality of bolt holes for steel plates are arranged on the connecting steel plates.
[0013] Furthermore, the connecting steel plates have two lengths, the shorter connecting steel plate is connected with the fixing pieces by bolts, and the longer connecting steel plate is located above the shorter connecting steel plate.
[0014] The present invention further provides a method for using a device for monitoring soil displacement by means of hydraulic burying. The method includes the following steps.
[0015] In Step 1, a site is leveled, a reaction force device is installed, and a pit slot is excavated in advance at a position of a monitoring point on earth surface.
[0016] In Step 2, an opticalfiber cable is installed; that is, a middle portion of the optical fiber cable is bent along an arc and the bent middle portion is put into a U-shaped optical fiber cable slot of a pointed cone steel member, and the optical fiber cable and the U-shaped optical fiber cable slot are fixed by using a high elastic mold adhesive or inserting a U-shaped inserted block into the U-shaped optical fiber cable slot forfixing.
[ 0017] In Step 3, a power device is connected; that is, top ends of water delivery pipes are connected to a high-pressure water pump, bottom ends of the water delivery pipes are connected to a water pipe connector, a top end of a mud suction pipe is connected to a mud suction pump, and a bottom end of the mud suction pipe is connected to the water pipe connector; the optical fiber cable installed in Step 2 is put into optical fiber cable slots of the hydraulic apparatus, and the pointed cone steel member abuts against the hydraulic apparatus by contact pressure through the limiting slots and a limiting block.
[ 0018] In Step 4, a sleeve is installed; that is, opening ends of a pair of C-shaped channel steels are arranged opposite to each other firstly, and then lower ends of the openings of the pair of C-shaped channel steels are closed by using a shorter connecting steel plate, the sleeve is sleeved onto the optical fiber cable, the water delivery pipes and the mud suction pipe, and a bottom end of the sleeve is fixed on the fixing pieces by bolts.
[ 0019] In Step 5, a top end of the sleeve is connected by using the reaction force device, the pointed cone steel member is put perpendicularly into the pit slot excavated in Step 1, the high pressure water pump is started, and then the soil is dispersed by a high-pressure water jet to form a mud, the mud suction pump is started to suction the mud onto the earth surface, and the device is slowly pressed into the soil, when half the length of the shorter connecting steel plate enters the soil, the high-pressure water pump and the mud pump are stopped, and the longer connecting steel plate is continued to be spliced above a shorter connecting steel plate.
[ 0020] In Step 6, the high-pressure water pump and the mud pump are restarted, the device is slowly pressed into the soil, when half the length of the longer connecting steel plate enters the soil, the high-pressure water pump and the mud pump are stopped, and the longer connecting steel plate are continued to be spliced; when the height of the pair of C-shaped channel steels is less than the height of the connecting steel plate, the pair of C-shaped channel steels is added.
[0021] In Step 7, Step 6 is repeated, when the soil penetration depth of the device reaches the design depth, whether the pair of connecting steel plates at the top end is close to the horizontal optical fiber cable is determined. If the pair of connecting steel plates is close to the horizontal optical fiber cable, the pair of connecting steel plates is immediately removed, and the reaction force device is adjusted to connect the device to the upper pair of connecting steel plates or the pair of C-shaped channel steels in the sleeve, and then the sleeve and the hydraulic apparatus are pulled up at a constant speed by using the reaction force device. If the pair of connecting steel plates is going away from the horizontal optical fiber cable, the sleeve and the hydraulic apparatus are continued to be pulled up at a constant speed by using the reaction force device. The above process is repeated continuously, and after completely pulling out the sleeve and the hydraulic apparatus, one end of the optical fiber cable is connected with an optical fiber demodulator.
[ 0022] In Step 8, after the lateral displacement is stable, a lateral displacement of the soil at the monitoring point is monitored in real time by setting the demodulator to zero.
[ 0023] Furthermore, before connecting the lower end of the hydraulic apparatus with the pointed cone steel member by contact pressure in Step 1, a mud suction nozzle is sleeved on a bottom end of a mud channel and high-pressure water nozzles are sleeved on the bottom ends of water inlet channels.
[0024] Moreover, after completely pulling out the sleeve and the hydraulic apparatus in Step
7, the optical fiber cable is continued to be laid to the next monitoring point. Steps 1 to 7 are repeated to finish burying the optical fiber cable at a plurality of monitoring points. The end of the optical fiber cable at the last monitoring point is connected with the optical fiber demodulator.
[ 0025] The beneficial effects of the present invention are that:
[ 0026] 1. The high-pressure water jet sprayed by the hydraulic apparatus is used to disperse the soil on the contact surface of the pointed cone steel member through the water flow channel and form a mud, and the mud is sucked onto the earth surface through the mud suction pipe. Combined with the reaction force device, the soil penetration depth of the optical fiber cable can be effectively increased, and the technical problem can be solved that the device for monitoring the soil displacement cannot monitor the soil displacement due to the shallow soil penetration depth of the apparatus in the hard soil area. The present invention has the advantages of small size, light weight, convenient carrying, strong durability and reusable.
[ 0027] 2. The pointed cone steel member is used as the bottom member of the device, and the cone tip makes it easier for the device to go into the soil. When the device reaches the design depth under the ground, the hydraulic apparatus is pulled out with the sleeve by using the reaction force device, and the optical fiber cable is left in the soil with the pointed cone steel member which has the function of fixing the lower end of the fiber and stabilizing it.
[ 0028] 3. In the hydraulic apparatus, the optical fiber cable channel with the whole body slotted design is used, which can be connected to the device at any position of the optical fiber cable and lowered to the position of the monitoring point, and the detachable sleeve is used to ensure that the optical fiber cable at a horizontal position is not affected during the mounting and removal of the sleeve and the hydraulic apparatus. Therefore, one optical fiber cable can be buried in a plurality of monitoring points, and soil displacement at the plurality of monitoring points can be measured using one optical fiber demodulator, thereby reducing labor and costs.
[0029] FIG. 1 illustrates a schematic diagram of a device in an embodiment of the present invention.
[0030] FIG. 2 illustrates a schematic diagram of the device after removing the sleeve in FIG. 1.
[0031] FIG. 3 illustrates a left side view and sectional view of FIG. 2, where FIG. 3a illustrates the left side view of FIG. 2, and FIG. 3b illustrates a B-B sectional view of FIG. 3a.
[ 0032] FIG. 4 illustrates an assembly schematic diagram of a pointed cone steel member, a hydraulic apparatus, an optical fiber cable in an embodiment of the present invention.
[ 0033] FIG. 5 illustrates a schematic diagram of a hydraulic apparatus in an embodiment of the present invention.
[ 0034] FIG. 6 illustrates a schematic diagram of the pointed cone steel member in FIG. 1.
[ 0035] FIG. 7 illustrates a schematic diagram of a mud suction nozzle in an embodiment of the present invention.
[ 0036] FIG. 8 illustrates a schematic diagram of the steel plate sleeve in FIG. 1.
[ 0037] FIG. 9 illustrates a schematic diagram of the pair of C-shaped channel steels in FIG. 8.
[ 0038] FIG. 10 illustrates schematic diagrams of a shorter connecting steel plate and a connecting steel plate in one embodiment.
[ 0039] FIG. 11 illustrates a circuit schematic diagram that utilizes an optical fiber cable and an optical fiber demodulator to monitor the soil displacements at a plurality of monitoring points in an embodiment.
[ 0040] Numbers in the drawings: 1. Hydraulic apparatus; 1-1. High-pressure water nozzles; 1-2. Water pipe connectors; 1-3. Mud suction pipe connector; 1-4. Optical fiber cable slots; 1 5. Fixing pieces; 1-51. Bolt holes for fixing pieces; 1-6. Limiting slots; 1-7. Mud channel; 1-8. Mud suction nozzle; 1-81. Circular interface; 1-82. Slot; 1-9. Water inlet channels; 1-10. Openings; 2. Pointed cone steel member; 2-1. Water flow channels; 2-11. Conical water flow channels; 2-12. Cylindrical water flow channels; 2-2. Cone tip; 2-3. U-shaped optical fiber cable slot; 2-4. Limiting block; 2-5. U-shaped inserted block; 3. Sleeve; 3-1. A pair of C-shaped channel steels; 3-111. Bolt holes for channel steels; 3-2. Apair of connecting steel plates; 3-21. Shorter connecting steel plate; 3-211. Bolt hole A for steel plates; 3-22. Longer connecting steel plate; 4. Optical fiber cable; 5. Water delivery pipes; 6. Mud suction pipe; 7. Optical fiber demodulator.
[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
[ 0042] As illustrated in FIGS. 1 and 2, the device for monitoring soil displacement by means of hydraulic burying provided by the present invention includes a sleeve 3, a hydraulic apparatus 1 and a pointed cone steel member 2. An upper end of the hydraulic apparatus 1 is fixedly connected to the sleeve 3, and a lower end is connected with the pointed cone steel member 3 by contact pressure.
[ 0043] As illustrated in FIGS. 3a and 3b, water inlet channels 1-9 that penetrate to the bottom are arranged on both sides inside the hydraulic apparatus 1, a mud channel 1-7 that penetrates to the bottom is arranged in the middle. The water inlet channels 1-9 are configured to connect water delivery pipes 5, and the mud channel 1-7 is configured to connect a mud suction pipe 6; optical fiber cable slots 1-4 that penetrate to the bottom are respectively provided between the two water inlet channels 1-9 and the mud channel 1-7, and the optical fiber cable slots 1-4 are configured to place an optical fiber cable 4; two front and rear opposite openings 1-10 are arranged at the bottom end of the hydraulic apparatus 1, and the openings 1-10 are located between the two optical fiber cable slots 1-4 and are configured to suck a mud into the mud channel 1-7. Water flow channels 2-1 corresponding to the positions of the water inlet channels 1-9 and penetrating to the bottom and a U-shaped optical fiber cable slot 2-3 corresponding to the positions of the optical fiber cable slots 1-4 are arranged inside the both sides of the pointed cone steel member 2. The optical fiber cable 4 and the optical fiber cable slots 1-4 are fixed by a high elastic mold adhesive, and the sleeve 3 is configured to encapsulate and protect the optical fiber cable 4, the water delivery pipes 5 and the mud suction pipe 6.
[ 0044] As illustrated in FIG. 4, water pipe connectors 1-2 are arranged on upper ends of the water inlet channels 1-9, a connector 1-3 of the mud suction pipe 6 is arranged on an upper end of the mud channel 1-7. The water delivery pipes 5 and the water pipe connectors 1-2 are detachably connected with each other, and the mud suction pipe 6 and the mud suction pipe connector 1-3 are detachably connected with each other. For example, a threaded connection or clamping connection can be used; as illustrated in FIG. 8, the sleeve 3 consists of a pair of C shaped channel steels 3-1 and a pair of connecting steel plates 3-2, and the opening ends of the C-shaped channel steels in the pair of C-shaped channel steels 3-1 are opposite to each other. The number of the pairs of C-shaped channel steels 3-1 is N and the pairs of C-shaped channel steels are arranged in a straight line from bottom to top, and N is a natural number greater than 1. The adjacent pairs of C-shaped channel steels 3-1 are bridged with each other by the connecting steel plates and the ends of their openings 1-10 are closed; fixing pieces 1-5 are arranged at four corners on the top end of the hydraulic apparatus 1. The C-shaped channel steels have the bolt holes 3-111 for channel steels, the connecting steel plates have the bolt holes 3-211 for steel plates, the fixing pieces 1-5 are L-shaped and each side has the bolt holes 1-51 for fixing pieces. The fixing pieces 1-5 are connected with the bottom pair of C-shaped channel steels 3-1 and the pair of connecting steel plates 3-2 by bolts to fixedly connect the upper end of the hydraulic apparatus 1 with the sleeve 3, and the bolts pass through the bolt holes 3-211 for steel plates, the bolt holes 3-111 for channel steels, and the bolt holes 1-51 for fixing pieces in sequence.
[0045] In this embodiment, a high-pressure water jet passing through the water delivery pipes and the water flow channels 2-1 is utilized to disperse soil on the contact surface of the pointed cone steel member 2 and form a mud, and the mud is sucked onto the earth surface through the mud suction pipe 6, which solves the technical problem that the device for monitoring the soil displacement cannot monitor the soil displacement due to the shallow soil penetration depth of the apparatus in the hard soil area.
[ 0046] Moreover, as illustrated in FIG. 6, the pointed cone steel member 2 is formed by a cone tip 2-2 and a limiting block 2-4. The limiting block 2-4 is arranged on a top plane end of the cone tip 2-2, and the water flow channels 2-1 penetrate the limiting block 2-4 and the cone tip 2-2. As illustrated in FIG. 5, limiting slots 1-6 are arranged at four corners at the bottom end of the hydraulic apparatus 1, and the limiting slots 1-6 and the limiting block 2-4 are clamped to connect the pointed cone steel member 2 with the hydraulic apparatus 1 by contact pressure. As illustrated in FIG. 4, the U-shaped optical fiber cable slot 2-3 is arranged in the middle of the limiting block 2-4, and the U-shaped optical fiber cable slot 2-3 is located between the two water flow channels 2-1. The U-shaped inserted block 2-5 is inserted into the U-shaped optical fiber cable slot 2-3 and configured to further fix the optical fiber cable 4 in the U-shaped optical fiber cable slot 2-3.
[ 0047] Additionally, as illustrated in FIG. 3b, upper ends of the water flow channels 2-1 are conical, lower ends of the water flow channels 2-1 are cylindrical, the conical water flow channels 2-11 and the cylindrical water flow channels 2-12 in the water flow channel 2-1 are integrally formed, as illustrated in FIG. 5, conical high-pressure water nozzles 1-1 are arranged on the bottom ends of the water inlet channels 1-9. The high-pressure water nozzles 1-1 and the bottom ends of the water inlet channels 1-9 can be integrally formed or can be sleeved. The high-pressure water nozzles 1-1 are embedded in the upper end of the water flow channel 2-1; the bottom ends of the water inlet channels 1-9 and the upper end of the water flow channel 2 1 are sealed and connected by the high-pressure water nozzles 1-1. At the same time, by reducing the size of the lower end of the water flow channel 2-1, the water flow pressure from the water flow channel 2-1 of the pointed cone steel member 2 is increased, and the energy efficiency of the water flow to disperse the soil on the contact surface of the pointed cone steel member 2 is increased.
[ 0048] In addition, as illustrated in FIGS. 2 and 7, a mud suction nozzle 1-8 is sleeved on a bottom end of the mud channel 1-7, a top end of the mud suction nozzle 1-8 has a circular interface 1-81, and the bottom end of the mud suction nozzle 1-8 has a slot 1-82 corresponding to the positions of the openings 1-10 at the bottom end of the hydraulic apparatus 1. The circular interface 1-81 illustrated is sleeved on the bottom end of the mud channel 1-7, and openings of the slot 1-82 illustrated are aligned to the openings 1-10 at the bottom end of the hydraulic apparatus 1. The suction nozzle 1-8 is used to protect the bottom end of the mud channel 1-7.
[ 0049] As illustrated in FIGS. 9 and 10, a plurality of bolt holes 3-211 for steel plates are arranged on the connecting steel plates. The connecting steel plates have two lengths, the shorter connecting steel plate 3-21 is connected with the fixing pieces 1-5 by bolts, and the longer connecting steel plate 3-22 is located above a shorter connecting steel plate 3-21.
[ 0050] In a specific embodiment, the overall size of the hydraulic apparatus 1 is 150 mm in length, 50 mm in width, and 100 mm in height, and the size is small, the inner diameters of the water pipe connectors 1-2 are 20 mm, the inner diameter of the mud suction pipe connector 1 3 is 30 mm, and the inner diameter of the tubular mud channel 1-7 is 30 mm and the height is 8 cm. The two front and rear opposite openings 1-10 at the bottom end of the hydraulic apparatus 1 are trapezoids with a height of 20 mm, and are configured to discharge the mud generated during the flushing process of the device from the mud channel 1-7 to the earth surface along the mud suction pipe 6; the diameters of the water inlet channels 1-9 are 20 mm, the outer diameters at the bottom ends of the high-pressure water nozzles 1-1 are 5 mm. The outer diameters of the cylindrical water flow channels 2-12 at the lower ends of the water flow channels 2-1 are 5 mm, and the optical fiber cable slots 1-4 are cylindrical slots with a diameter of 10 mm, and the U-shaped optical fiber cable slot 2-3 is a semicircular space with a width of mm and a radius of 35 mm; the fixing pieces 1-5 are welded on the four comers at the top end of the hydraulic apparatus 1, and each fixing piece 1-5 is a steel piece with two sides perpendicular to each other, and the bolt holes 1-51 for fixing pieces with a diameter of 8 mm is opened in the centers of the steel pieces, the two pieces of steel sheets are laterally welded to each other, and the diameters of the bolt holes 3-211 for steel plates and the bolt holes 3-111 for channel steels are all 8 mm. The limiting slots 1-6 are located at the bottom end of the hydraulic apparatus 11 and form a convex structure outside and a hollow slot formed inside. The size is 150 mm in length, 50 mm in width and 20 mm in height, and the thickness of the slot wall is 2 mm, the size of the limiting block 2-4 of the pointed cone steel member 2 is 146 mm in length, 46 mm in width and 20 mm in height. The limiting block 2-4 is just embedded into the limiting slots 1-6; the opening of the slot 1-82 of the mud suction nozzle 1-8 is the same size as the two front and rear opposite openings 1-10 at a bottom end of the hydraulic apparatus 1, and the length of the slot 1-82 is 50 mm and is the same as the width of the hydraulic apparatus 1, the outer diameter of the circular interface 1-81 of the mud suction nozzle 1-8 is 30 mm, the circular interface 1-81 is just embedded in the bottom end of the mud channel 1-7; the lengths of the C shaped channel steels are 1 m, the waist heights are 150 mm, the leg widths are 20 mm, and the longer connecting steel plate 3-22 is 1 m in length and 50 mm in width, and the shorter connecting steel plate 3-21 is 0.5 m in length and 50 mm in width; the pressures of the water flows from the water flow channels 2-1 of the pointed cone steel member 2 are over 20 MPa.
[0051] The present invention further provides a method for using a device for monitoring soil displacement by means of hydraulic burying. The method includes the following steps.
[ 0052] In Step 1, a site is leveled, a reaction force device (in this embodiment, the reaction force device is a main engine, cross arm and ground anchor of the static cone penetration instrument) is installed, and a pit slot with a depth of 10 cm, a length of 15 cm and a width of 5 cm is excavated in advance at a position of a monitoring point on earth surface, and an optical fiber cable slot with a depth of 20 cm is excavated along the monitoring point.
[ 0053] In Step 2, an optical fiber cable 4 is installed, an optical fiber cable 4 with a length of twice the monitoring depth at the position of the monitoring point and more than 2 m is prepared in advance, a middle portion of the optical fiber cable 4 is bent along an arc and the bent middle portion is put into a U-shaped optical fiber cable slot 2-3 of a pointed cone steel member 2, and the optical fiber cable 4 and the U-shaped optical fiber cable slot 2-3 are fixed by using a high elastic mold adhesive or inserting a U-shaped inserted block 2-5 into the U-shaped optical fiber cable slot 2-3 for fixing, so as to ensure that the optical fiber cable 4 is fixed with the pointed cone steel member 2.
[ 0054] In Step 3, a power device is connected, that is, top ends of water delivery pipes 5 are connected to a high-pressure water pump, bottom ends of the water delivery pipes 5 are threaded or clamped with the water pipe connectors 1-2, a top end of a mud suction pipe 6 is connected to a mud suction pump, and a bottom end of the mud suction pipe 6 is threaded or clamped with the water pipe connectors 1-2. The optical fiber cable 4 installed in Step 2 is put into the optical fiber cable slots 1-4 of the hydraulic apparatus 1 from a channel of the optical fiber cable 4, and the pointed cone steel member 2 abuts against the hydraulic apparatus 1 by contact pressure through the limiting slots 1-6 and a limiting block 2-4.
[ 0055] In Step 4, a sleeve 3 is installed, that is, ends of openings 1-10 of a pair of C-shaped channel steels are arranged opposite to each other firstly, and then lower ends of the openings of the pair of C-shaped channel steels 3-1 are closed by using a shorter connecting steel plate 3-21, the sleeve 3 is sleeved onto the optical fiber cable 4, the water delivery pipes 5 and the mud suction pipe 6, and a bottom end of the sleeve 3 is fixed on the fixing pieces 1-5 by bolts.
[ 0056] In Step 5, a top end of the sleeve 3 is connected by using the reaction force device, the pointed cone steel member 2 is put perpendicularly into the pit slot excavated in Step 1, the high-pressure water pump is started, and then soil is dispersed by a high-pressure water jet to form a mud, the mud suction pump is started to suction the mud onto the earth surface, and the device is slowly pressed into the soil, when half the length of the shorter connecting steel plate 3-21 enters the soil, the high-pressure water pump and the mud pump are stopped, and a longer connecting steel plate 3-22 is continued to be spliced above the shorter connecting steel plate 3-21.
[ 0057] In Step 6, the high-pressure water pump and the mud pump are restarted, the device is slowly pressed into the soil, when half the length of the longer connecting steel plate 3-22 enters the soil , the high-pressure water pump and the mud pump are stopped, and the longer connecting steel plate 3-22 are continued to be spliced, when the height of the pair of C-shaped channel steels 3-1 is less than the height of the connecting steel plate, the pair of C-shaped channel steels 3-1 is added.
[ 0058] In Step 7, Step 6 is repeated, when the soil penetration depth of the device reaches the design depth, whether the pair of connecting steel plates 3-2 at the top end is close to the horizontal optical fiber cable 4 is determined, if the pair of connecting steel plates 3-2 is close to the horizontal optical fiber cable 4, the pair of connecting steel plates 3-2 is immediately removed, and the reaction force device is adjusted to connect the device to the upper pair of connecting steel plates 3-2 or the pair of C-shaped channel steels 3-1 in the sleeve 3, and then the sleeve 3 and the hydraulic apparatus 1 are pulled up at a constant speed by using the reaction force device, if the pair of connecting steel plates 3-2 is going away from the horizontal optical fiber cable 4, the sleeve 3 and the hydraulic apparatus 1 are continued to be pulled up at a constant speed by using the reaction force device; the above process is repeated continuously, and after the sleeve 3 and the hydraulic apparatus 1 are completely pulled out, one end of the optical fiber cable 4 is connected with an optical fiber demodulator 7.
[0059] In Step 8, a lateral displacement of the soil at the monitoring point is monitored in real time by setting the demodulator to zero.
[ 0060] Moreover, before connecting the lower end of the hydraulic apparatus 1 with the pointed cone steel member 2 by contact pressure in Step 1, a mud suction nozzle 1-8 is sleeved on a bottom end of a mud channel 1-7 and high-pressure water nozzles 1-1 are sleeved on bottom ends of water inlet channels 1-9.
[ 0061] In addition, as illustrated in FIG. 11, after completely pulling out the sleeve 3 and the hydraulic apparatus 1in Step 7, the optical fiber cable 4 is continued to be laid to the next monitoring point, and Steps 1 to 7 are repeated to finish burying the optical fiber cable 4 with a length of 500 m as a node at a plurality of monitoring points, an end of the optical fiber cable 4 at the last monitoring point within the range of each node is connected with the optical fiber demodulator 7.
[ 0062] The above descriptions are only some preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims (10)
1. A device for monitoring soil displacement by means of hydraulic burying, characterized by comprising a sleeve (3), a hydraulic apparatus (1) and a pointed cone steel member (2), wherein an upper end of the hydraulic apparatus (1) is fixedly connected to the sleeve (3), and a lower end of the hydraulic apparatus (1) connected with the pointed cone steel member (2) by contact pressure; wherein water inlet channels (1-9) penetrating to a bottom are arranged on both sides inside the hydraulic apparatus (1), a mud channel (1-7) penetrating to the bottom is arranged in the middle inside the hydraulic apparatus (1), the water inlet channels (1-9) are configured to be connected to water delivery pipes (5), and the mud channel (1-7) is configured to be connected with a mud suction pipe (6); optical fiber cable slots (1-4) penetrating to the bottom are respectively arranged between the two water inlet channels (1-9) and the mud channel (1 7), and the optical fiber cable slots (1-4) are configured to place an optical fiber cable (4); two front and rear opposite openings (1-10) are arranged at a bottom end of the hydraulic apparatus (1), and the openings (1-10) are located between the two optical fiber cable slots (1-4) and are configured to suck a mud into the mud channel (1-7); water flow channels (2-1) corresponding to positions of the water inlet channels (1-9) and penetrating to the bottom and a U-shaped optical fiber cable slot (2-3) corresponding to positions of the optical fiber cable slots (1-4) are arranged on both sides inside the pointed cone steel member (2); and the sleeve (3) is configured to encapsulate and protect the optical fiber cable (4), the water delivery pipes (5) and the mud suction pipe (6).
2. The device for monitoring the soil displacement by means of hydraulic burying according to claim 1, characterized in that the pointed cone steel member (2) is formed by a cone tip (2-2) and a limiting block (2-4), the limiting block (2-4) is arranged on a top plane end of the cone tip (2-2), and the water flow channels (2-1) penetrate the limiting block (2-4) and the cone tip (2-2); limiting slots (1-6) are arranged at the bottom end of the hydraulic apparatus (1), and the limiting slots (1-6) and the limiting block (2-4) connect the pointed cone steel member (2) with the hydraulic apparatus (1) by contact pressure; the U-shaped optical fiber cable slot (2-3) is arranged in the middle of the limiting block (2-4), and the U-shaped optical fiber cable slot (2 3) is located between the two water flow channels (2-1), the U-shaped inserted block (2-5) is inserted into the U-shaped optical fiber cable slot (2-3) and configured to fix the optical fiber cable (4).
3. The device for monitoring the soil displacement by means of hydraulic burying according to claim 2, characterized in that upper ends of the water flow channels (2-1) are in a shape of a cone, lower ends of the water flow channels (2-1) are in a shape of a cylinder, and high-pressure water nozzles (1-1) in a shape of a cone are arranged on bottom ends of the water inlet channels (1-9) and are embedded in the upper ends of the water flow channels (2-1).
4. The device for monitoring the soil displacement by means of hydraulic burying according to claim 2, characterized in that a mud suction nozzle (1-8) is sleeved on a bottom end of the mud channel (1-7), a top end of the mud suction nozzle (1-8) has a circular interface (1-81), and a bottom end of the mud suction nozzle (1-8) has a slot (1-82) corresponding to positions of the openings (1-10) at the bottom end of the hydraulic apparatus (1), the circular interface (1-81) illustrated is sleeved on the bottom end of the mud channel (1-7), and slot openings illustrated are aligned to the openings (1-10) at the bottom end of the hydraulic apparatus (1).
5. The device for monitoring the soil displacement by means of hydraulic burying according to claim 1, characterized in that water pipe connectors (1-2) are arranged on upper ends of the water inlet channels (1-9), a mud suction pipe connector (1-3) is arranged on an upper end of the mud channel (1-7), the water delivery pipes (5) and the water pipe connectors (1-2) are detachably connected with each other, and the mud suction pipe (6) and the mud suction pipe connector (1-3) are detachably connected with each other; the sleeve (3) consists of a pair of C shaped channel steels (3-1) and a pair of connecting steel plates (3-2), and opening ends of the C-shaped channel steels in the pair of C-shaped channel steels (3-1) are opposite to each other, a number of the pair of C-shaped channel steels (3-1) is N and the pairs of C-shaped channel steels (3-1) are arranged in a straight line from bottom to top, and N is a natural number greater than 1; the adjacent pairs of C-shaped channel steels (3-1) are bridged with each other by the connecting steel plates and the opening ends of the pairs of C-shaped channel steels are closed; fixing pieces (1-5) are arranged at four corners on a top end of the hydraulic apparatus (1), the fixing pieces (1-5) are connected with a pair of C-shaped channel steels (3-1) on the bottom and the pair of connecting steel plates (3-2) by bolts tofixedly connect the upper end of the hydraulic apparatus (1) with the sleeve (3).
6. The device for monitoring the soil displacement by means of hydraulic burying according to claim 5, characterized in that a plurality of bolt holes (3-211) for the steel plates are arranged on the connecting steel plates.
7. The device for monitoring the soil displacement by means of hydraulic burying according to claim 6, characterized in that the connecting steel plates have two lengths, wherein a shorter connecting steel plate (3-21) is connected with the fixing pieces (1-5) by bolts, and a longer connecting steel plate (3-22) is located above the shorter connecting steel plate (3-21).
8. A method for using a device for monitoring soil displacement by means of hydraulic burying, characterized by comprising following steps:
Step 1: leveling a site, installing a reaction force device, and excavating a pit slot in advance at a position of a monitoring point on earth surface;
Step 2: installing an optical fiber cable (4), that is, bending a middle portion of the optical fiber cable (4) along an arc and putting the bent middle portion into a U-shaped optical fiber cable slot (2-3) of a pointed cone steel member (2), and fixing the optical fiber cable (4) and the U shaped optical fiber cable slot (2-3) by using a high elastic mold adhesive, or inserting a U shaped inserted block (2-5) into the U-shaped optical fiber cable slot (2-3) forfixing;
Step 3: connecting a power device, that is, connecting top ends of water delivery pipes (5) to a high-pressure water pump, bottom ends of the water delivery pipes (5) to water pipe connectors (1-2), a top end of a mud suction pipe (6) to a mud suction pump, and a bottom end of the mud suction pipe (6) to a water pipe connector (1-2); putting the optical fiber cable (4) installed in
Step 2 into optical fiber cable slots (1-4) of the hydraulic apparatus (1), and abutting the pointed cone steel member (2) against the hydraulic apparatus (1) by contact pressure through limiting slots (1-6) and a limiting block (2-4);
Step 4: installing a sleeve (3), that is, arranging opening ends of a pair of C-shaped channel steels opposite to each other firstly, and then closing lower ends of the openings of the pair of C-shaped channel steels (3-1) by using a shorter connecting steel plate (3-21), sleeving the sleeve (3) onto the optical fiber cable (4), the water delivery pipes (5) and the mud suction pipe (6), and then fixing a bottom end of the sleeve (3) on the fixing pieces (1-5) by bolts;
Step 5: connecting a top end of the sleeve (3) by using the reaction force device, putting the pointed cone steel member (2) perpendicularly into the pit slot excavated in Step 1, starting the high-pressure water pump, and then dispersing the soil by a high-pressure water jet to form a mud, starting the mud suction pump to suction the mud onto the earth surface, and slowly pressing the device into the soil, stopping the high-pressure water pump and the mud pump when half the length of the shorter connecting steel plate (3-21) enters the soil, and further splicing a longer connecting steel plate (3-22) above the shorter connecting steel plate (3-21);
Step 6: restarting the high-pressure water pump and the mud pump, slowly pressing the device into the soil mass, stopping the high-pressure water pump and the mud pump when half the length of the longer connecting steel plate (3-22) enters the soil, further splicing the longer connecting steel plate (3-22), and adding a pair of C-shaped channel steels (3-1) when a height of the pair of C-shaped channel steels (3-1) is less than a height of the connecting steel plate;
Step 7: repeating Step 6, determining whether the pair of connecting steel plates (3-2) at the top end are close to the horizontal optical fiber cable (4) when the soil penetration depth of the device reaches a design depth; when the pair of connecting steel plates (3-2) are close to the horizontal optical fiber cable (4), immediately removing the pair of connecting steel plates (3 2) and adjusting the reaction force device to be connected to an upper pair of connecting steel plates (3-2) or the pair of C-shaped channel steels (3-1) in the sleeve (3), and then pulling up the sleeve (3) and the hydraulic apparatus (1) at a constant speed by using the reaction force device; when the pair of connecting steel plates (3-2) is going away from the horizontal optical fiber cable (4), continuing pulling up the sleeve (3) and the hydraulic apparatus (1) at a constant speed by using the reaction force device; repeating the above process continuously, and connecting one end of the optical fiber cable (4) with an optical fiber demodulator (7) after completely pulling out the sleeve (3) and the hydraulic apparatus (1); and
Step 8: monitoring a lateral displacement of the soil mass at the monitoring point in real time by setting the demodulator to zero.
9. The method for using the device for monitoring the soil displacement by means of hydraulic burying according to claim 8, characterized by sleeving a mud suction nozzle (1-8) on a bottom end of a mud channel (1-7) and sleeving high-pressure water nozzles (1-1) on bottom ends of water inlet channels (1-9), before connecting the lower end of the hydraulic apparatus (1) with the pointed cone steel member (2) by contact pressure in Step 1.
10. The method for using the device for monitoring the soil displacement by means of hydraulic burying according to claim 8, characterized by continuing arranging the optical fiber cable (4) to the next monitoring point after completely pulling out the sleeve (3) and the hydraulic apparatus (1) in Step 7, repeating Steps 1 to 7 to finish burying the optical fiber cable (4) at a plurality of monitoring points, and connecting an end of the optical fiber cable (4) at a last monitoring point with the optical fiber demodulator (7).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492475.9 | 2020-12-17 | ||
| CN202011492475.9A CN112921943B (en) | 2020-12-17 | 2020-12-17 | Hydraulic burying and monitoring device for soil displacement and using method thereof |
| PCT/CN2021/110602 WO2022127136A1 (en) | 2020-12-17 | 2021-08-04 | Device for monitoring soil displacement by means of hydraulic burying, and use method thereof |
Publications (2)
| Publication Number | Publication Date |
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| AU2021398759A1 true AU2021398759A1 (en) | 2022-09-08 |
| AU2021398759A8 AU2021398759A8 (en) | 2022-10-20 |
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| AU2021398759A Pending AU2021398759A1 (en) | 2020-12-17 | 2021-08-04 | Device for monitoring soil displacement by means of hydraulic burying, and use method thereof |
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| Country | Link |
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| CN (1) | CN112921943B (en) |
| AU (1) | AU2021398759A1 (en) |
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| CN112921943B (en) * | 2020-12-17 | 2022-06-10 | 南京工业大学 | Hydraulic burying and monitoring device for soil displacement and using method thereof |
| CN116043885B (en) * | 2022-12-23 | 2024-04-16 | 中铁广州工程局集团有限公司 | Large double-wall steel cofferdam vibration mud suction sinking process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4786848A (en) * | 1987-07-27 | 1988-11-22 | Davidson Textron Inc. | Water jet trim head simulator |
| CN105484731A (en) * | 2015-12-11 | 2016-04-13 | 中国地质大学（武汉） | Inclination measurement hole construction method |
| ITUA20163182A1 (en) * | 2016-05-05 | 2017-11-05 | C S G S R L | Device for 2D / 3D monitoring of geotechnical, geological-structural, hydrogeological and geophysical parameters of soils, rocks and structures in general |
| CN109655001B (en) * | 2019-02-03 | 2024-05-24 | 南京吉欧地下空间科技有限公司 | Device for in-situ monitoring of soil lateral displacement and application method thereof |
| CN110439048A (en) * | 2019-08-29 | 2019-11-12 | 南京江北新区中心区发展有限公司 | A kind of hydraulicking strand suction device and method for inner support base pit engineering |
| CN111441394A (en) * | 2020-02-24 | 2020-07-24 | 中交天津港湾工程研究院有限公司 | Auxiliary installation method of inclinometer pipe for monitoring deep horizontal displacement of deep foundation pit |
| CN112921943B (en) * | 2020-12-17 | 2022-06-10 | 南京工业大学 | Hydraulic burying and monitoring device for soil displacement and using method thereof |
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2020
- 2020-12-17 CN CN202011492475.9A patent/CN112921943B/en active Active
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2021
- 2021-08-04 AU AU2021398759A patent/AU2021398759A1/en active Pending
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| Publication number | Publication date |
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| AU2021398759A8 (en) | 2022-10-20 |
| CN112921943A (en) | 2021-06-08 |
| WO2022127136A1 (en) | 2022-06-23 |
| CN112921943B (en) | 2022-06-10 |
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