CN110219297B - Real-time measuring device for soil thickness - Google Patents
Real-time measuring device for soil thickness Download PDFInfo
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- CN110219297B CN110219297B CN201910597328.9A CN201910597328A CN110219297B CN 110219297 B CN110219297 B CN 110219297B CN 201910597328 A CN201910597328 A CN 201910597328A CN 110219297 B CN110219297 B CN 110219297B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
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Abstract
The invention provides a soil layer thickness real-time measuring device, belongs to the technical field of measuring instruments, and can measure deformation of soil layers below the earth surface in real time. The soil layer thickness real-time measuring device comprises an upper soil clamping plate and a lower soil clamping plate which is oppositely arranged below the upper soil clamping plate, wherein a space for filling a soil layer to be measured is formed between the upper soil clamping plate and the lower soil clamping plate; a support piece and telescopic distance measuring equipment are arranged in the space; the supporting piece is supported between the upper soil clamping plate and the lower soil clamping plate along the vertical direction, and the supporting piece can be contracted along the vertical direction; the telescopic distance measuring equipment is supported between the upper soil clamping plate and the lower soil clamping plate along the vertical direction, and the telescopic distance measuring equipment can stretch along the vertical direction; the telescopic distance measuring equipment is electrically connected with a lead, the other end of the lead extends to the ground surface and is electrically connected with data processing equipment, and the data processing equipment at least comprises a data display or a data memory.
Description
Technical Field
The invention belongs to the technical field of measuring instruments, and particularly relates to a real-time soil layer thickness measuring device.
Background
In the technical field of engineering, the deformation amount of the interior of pressure-bearing soil bodies such as building soil foundations, storage yards, road embankments and the like needs to be measured sometimes, but at present, few in-situ detection devices capable of directly measuring the pressure strain of the interior of a soil layer are provided. The existing layered settlement meter can be used for detecting the deformation of soil between layers, but an observation tube supported by the layered settlement meter can influence the compaction of soil, and the deformation difference between the obtained deformation data and the deformation caused by the load borne by the surrounding soil is larger. The existing deflectometer can be used for measuring the rebound deformation of the earth surface, but cannot detect the rebound deformation of the earth layer below the earth surface. Therefore, the real-time soil layer thickness measuring device capable of measuring the deformation of the underground soil layer and not interfering with construction and operation equipment is developed, and has important significance for engineering technology research and engineering management of roadbed, soil foundation and the like.
Disclosure of Invention
The invention provides a soil layer thickness real-time measuring device aiming at the technical problem that the existing deformation measuring equipment cannot detect the deformation of a soil layer below the earth surface, which can measure the deformation of the soil layer below the earth surface in real time, can be used for monitoring the compression deformation of a soil body in construction, the expansion deformation of the soil body during the rising of underground water, the rebound deformation of the soil body in construction and operation, evaluating the deformation modulus and the soil pressure of the soil body, establishing a deformation curve, constructing a soil pressure field and other deformation measurement and other technical analysis works.
In order to achieve the purpose, the invention adopts the technical scheme that:
the soil layer thickness real-time measuring device comprises an upper soil clamping plate and a lower soil clamping plate which is oppositely arranged below the upper soil clamping plate, wherein a space for filling a soil layer to be measured is formed between the upper soil clamping plate and the lower soil clamping plate; a supporting piece for supporting the upper soil clamping plate and telescopic distance measuring equipment for measuring the vertical distance between the upper soil clamping plate and the lower soil clamping plate in real time are arranged in the space; the supporting piece is supported between the upper soil clamping plate and the lower soil clamping plate along the vertical direction, and the supporting piece can be contracted along the vertical direction; the telescopic distance measuring equipment is supported between the upper soil clamping plate and the lower soil clamping plate along the vertical direction, and is telescopic along the vertical direction; the telescopic distance measuring equipment is electrically connected with a lead, the other end of the lead extends to the ground surface and is electrically connected with data processing equipment, and the data processing equipment at least comprises a data display or a data memory.
Preferably, the top surface of the upper soil clamping plate and the top surface of the lower soil clamping plate are arranged in parallel, the center of the bottom surface of the upper soil clamping plate and the center of the top surface of the lower soil clamping plate are located on the same vertical straight line, and two ends of the telescopic distance measuring device are respectively located at the center of the bottom surface of the upper soil clamping plate and the center of the top surface of the lower soil clamping plate.
Preferably, a groove is formed in the center of the soil clamping plate supported by the extending end of the telescopic distance measuring equipment, the periphery of the groove is a plane, an inner slope surface, an outer slope surface, an inner plane and outer upward slope or an inner plane and outer downward slope, and the extending end of the telescopic distance measuring equipment is located in the groove.
Preferably, the supporting member is a supporting sleeve, the supporting sleeve is sleeved on the periphery of the telescopic distance measuring equipment, the bottom end of the supporting sleeve is connected to the lower soil clamping plate, and the top end of the supporting sleeve is abutted against the bottom surface of the upper soil clamping plate; the supporting sleeve is characterized in that a plurality of tearing lines are arranged on the wall of the supporting sleeve along the direction of a generatrix, the tearing lines are arranged at intervals along the circumferential direction of the supporting sleeve, and the tearing lines extend to the top end of the supporting sleeve so that the top end of the supporting sleeve is split along the tearing lines when being subjected to pressure applied by the upper soil clamping plate.
Preferably, the periphery of the telescopic distance measuring equipment is sleeved with a soil blocking sleeve for blocking soil particles, and the soil blocking sleeve is telescopic along the vertical direction.
Preferably, the soil retaining sleeve is formed by sequentially sleeving a plurality of soil retaining sub-pipes, the top end of the soil retaining sub-pipe positioned at the topmost layer is connected to the upper soil clamping plate, and the bottom end of the soil retaining sub-pipe positioned at the bottommost layer is connected to the lower soil clamping plate.
Preferably, the telescopic distance measuring device is selected from any one of an electronic dial indicator, a dial indicator type resistance strain displacement sensor, a magnetostrictive displacement sensor, a magnetic grating ruler telescopic displacement sensor or a grating ruler telescopic displacement sensor.
Preferably, the periphery of the lead is sleeved with a protective sleeve.
Preferably, the lower soil clamping plate is provided with an anchoring bolt for embedding in a hard soil layer.
Preferably, a plurality of holes are formed in the lower soil clamping plate.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. according to the soil layer thickness real-time measuring device provided by the invention, a space for filling a soil layer to be measured is formed between the upper soil clamping plate and the lower soil clamping plate, when the soil layer thickness real-time measuring device is used for detecting the compressed thickness variation of the soil layer, the soil layer is buried underground and is pressed by the upper soil clamping plate, the soil layer is compacted by the upper soil clamping plate, meanwhile, the upper soil clamping plate presses the supporting piece and the telescopic distance measuring equipment to shrink along the vertical direction, the thickness variation of the soil layer under compression can be measured by the telescopic distance measuring equipment, the detection data of the telescopic distance measuring equipment can be transmitted to the ground surface through the arranged data processing equipment, and the compressed thickness variation of the soil layer under the ground surface is detected; after the pressure is applied and the soil layer is separated, the upper soil clamping plate is forced to move upwards by resilience of the soil layer, meanwhile, the telescopic distance measuring equipment is extended, the thickness variation of the soil layer during resilience can be measured by the telescopic distance measuring equipment, and the detection of resilience deformation below the earth surface is realized;
2. the soil layer thickness real-time measuring device provided by the invention has the advantages of simple structure and accurate measurement, can meet the requirements of different detection or experimental scenes, and can be used for monitoring the compression deformation of a soil body in construction, the expansion deformation of the soil body during the rising of underground water, the rebound deformation of the soil body in construction and operation, evaluating the deformation modulus and the soil pressure of the soil body, establishing a deformation curve, constructing a soil pressure field and other deformation measurement and other technical analysis works;
3. the real-time soil layer thickness measuring device provided by the invention can automatically record and transmit data after the previous embedding work is finished, and can effectively save human resources for long-term monitoring projects;
4. the soil layer thickness real-time measuring device provided by the invention is used for providing more visual and accurate data when the rebound deformation of a high-load soil layer is measured.
Drawings
Fig. 1 is a schematic structural diagram of a soil layer thickness real-time measuring device provided in an embodiment of the present invention;
FIG. 2 is a schematic structural view of an upper soil clamping plate with an outer slope surface on the periphery of the bottom surface according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an upper soil clamping plate with a planar bottom surface and a planar periphery according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of an upper soil clamping plate with an inner slope surface on the periphery of the bottom surface according to an embodiment of the present invention;
fig. 5 is a schematic structural view of an upper soil clamping plate with an inner flat and outer upward slope on the periphery of the bottom surface according to an embodiment of the present invention;
fig. 6 is a schematic structural view of an upper soil clamping plate with an inner flat outer top slope on the periphery of the bottom surface according to an embodiment of the present invention;
FIG. 7 is a front view of a support sleeve provided in accordance with an embodiment of the present invention;
FIG. 8 is a top view of a support sleeve provided in accordance with an embodiment of the present invention;
in the above figures: 1. an earth clamping plate is arranged; 101. a groove; 2. a lower soil clamping plate; 3. a support sleeve; 301. tearing the line; 4. a telescopic distance measuring device; 5. a wire; 6. a data processing device; 7. a soil retaining sleeve; 71. a soil retaining sub-pipe; 8. protecting the sleeve; 81. protecting the sub-tube; 9. and (6) anchoring and tying.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "top", "bottom", etc. indicate orientations or positional relationships based on the positional relationships shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, an embodiment of the present invention relates to a real-time soil layer thickness measuring device, which includes an upper soil clamping plate 1 and a lower soil clamping plate 2 disposed below the upper soil clamping plate 1, wherein a space for accommodating a soil layer to be measured is formed between the upper soil clamping plate 1 and the lower soil clamping plate 2; a supporting piece for supporting the upper soil clamping plate 1 and a telescopic distance measuring device 4 for measuring the vertical distance between the upper soil clamping plate 1 and the lower soil clamping plate 2 in real time are arranged in the space; the supporting piece is supported between the upper soil clamping plate 1 and the lower soil clamping plate 2 along the vertical direction and can be contracted along the vertical direction; the telescopic distance measuring equipment 4 is supported between the upper soil clamping plate 1 and the lower soil clamping plate 2 along the vertical direction, and the telescopic distance measuring equipment 4 can stretch along the vertical direction; the telescopic distance measuring device 4 is electrically connected with a lead 5, the other end of the lead 5 extends to the ground surface and is electrically connected with a data processing device 6 for processing the measurement data of the telescopic distance measuring device 4, and the data processing device 6 at least comprises a data display or a data memory. In this embodiment, the fixed end of the telescopic distance measuring device 4 is fixedly mounted on the lower soil clamping plate 2, and the extending end of the telescopic distance measuring device 4 abuts against the bottom surface of the upper soil clamping plate 1. It will be appreciated that the telescopic ranging apparatus 4 may also be mounted upside down by a person skilled in the art.
The soil layer thickness real-time measuring device is characterized in that a space for filling a soil layer to be measured is formed between the upper soil clamping plate 1 and the lower soil clamping plate 2, when the soil layer thickness real-time measuring device is used for detecting the variation of the pressed thickness of the soil layer, the soil layer is buried underground and is pressed by the upper soil clamping plate 1, the soil layer is compacted by the upper soil clamping plate 1, meanwhile, the upper soil clamping plate 1 presses the supporting piece and the telescopic distance measuring equipment 4 to shrink along the vertical direction, the thickness variation of the pressed soil layer can be measured by the telescopic distance measuring equipment 4, the measuring data of the telescopic distance measuring equipment 4 can be transmitted to the ground surface through the arranged data processing equipment 6, and the detection of the pressed thickness variation of the soil layer below the ground surface; after the soil layer is pressed and separated, the soil layer rebounds to force the upper soil clamping plate 1 to move upwards, meanwhile, the telescopic distance measuring equipment 4 extends, the thickness change of the soil layer during rebounding can be measured through the telescopic distance measuring equipment 4, and the detection of the rebounding deformation below the ground surface is realized. The soil layer thickness real-time measuring device is simple in structure and accurate in measurement, can meet the requirements of different detection or experimental scenes, can be used for monitoring the compression deformation of a soil body in construction, monitoring the expansion deformation of the soil body during the rising of underground water, monitoring the rebound deformation of the soil body in construction and operation, evaluating the deformation modulus and the soil pressure of the soil body, establishing a deformation curve, constructing a soil pressure field and other deformation measurement and other technical analysis works. Moreover, the real-time soil layer thickness measuring device can automatically record and transmit data after the previous embedding work is finished, and can effectively save human resources for long-term monitoring projects. In addition, above-mentioned soil layer thickness real-time measuring device for when being used for high load soil layer resilience deformation measurement, can provide more directly perceived accurate data.
In order to improve the accuracy of the measurement result, as shown in fig. 1, preferably, the top surface of the upper soil clamping plate 1 and the top surface of the lower soil clamping plate 2 are arranged in parallel, and the center of the bottom surface of the upper soil clamping plate 1 and the center of the top surface of the lower soil clamping plate 2 are located on the same vertical straight line; two ends of the telescopic distance measuring equipment 4 are respectively positioned at the center of the bottom surface of the upper soil clamping plate 1 and the center of the top surface of the lower soil clamping plate 2. After the upper soil clamping plate 1, the lower soil clamping plate 2 and the telescopic distance measuring equipment 4 are arranged, the upper soil clamping plate 1 can be guaranteed to be stressed in the vertical direction, the telescopic distance measuring equipment 4 is located in the center of a soil layer to be measured, and the fact that the telescopic distance measuring equipment 4 is accurate in measuring results of soil layer thickness changes is guaranteed.
Further, as shown in fig. 1 to 6, a groove 101 is provided in the center of the soil clamping plate supported by the extending end of the telescopic distance measuring device 4, the periphery of the groove 101 is a plane, an inner slope surface, an outer slope surface, an inner flat and outer upward slope, or an inner flat and outer downward slope, and the extending end of the telescopic distance measuring device 4 is located in the groove 101. In this embodiment, the groove 101 is disposed in the center of the bottom surface of the upper soil clamping plate 1. Through the recess 101 that sets up, can prevent the slip of the end that stretches out at telescopic range unit 4, and recess 101 can be according to whether the soil layer slides or in order to mark the phase-match with there being the limit of side, no limit of side laboratory test all around, specifically set up to plane or inside and outside domatic or interior flat outer uphill or interior flat outer downhill path to satisfy the measuring needs.
Among the above-mentioned soil layer thickness real-time measuring device, the support piece that sets up is used for pressing from both sides native board 1 and 2 between not fill out and fill out when not compacting in earth and supporting on pressing from both sides native board 1 down, and after filling out the compaction, the soil layer of filling replaces support piece and plays the effect of supporting on pressing from both sides native board 1. In order to facilitate the support member to contract under the pressure applied by the upper soil clamping plate 1, as shown in fig. 1, 7 and 8, preferably, the support member is a support sleeve 3, the support sleeve 3 is sleeved on the periphery of the telescopic distance measuring device 4, the bottom end of the support sleeve 3 is connected to the lower soil clamping plate 2, and the top end of the support sleeve 3 is abutted against the bottom surface of the upper soil clamping plate 1; the pipe wall of the support sleeve 3 is provided with a plurality of tear lines 301 along the generating line direction, the tear lines 301 are arranged along the circumferential direction of the support sleeve 3 at intervals, and the tear lines 301 extend to the top end of the support sleeve 3, so that the top end of the support sleeve 3 is split along the tear lines 301 when being subjected to the pressure applied by the upper soil clamping plate 1. It should be noted that, in this embodiment, the supporting sleeve 3 splits along the tear line 301 outward, and is in a horn shape after splitting, so as to block surrounding impurities from entering the supporting sleeve 3, and be suitable for many experimental scenarios in complex environments. It should be further noted that, for convenience of processing, a groove may be formed in the wall of the support sleeve 3 to form the tear line 301, or a hole may be punched in the wall of the support sleeve 3 according to a preset distance and path to form the tear line 301; the material of the support sleeve 3 is preferably PVC, and the diameter and wall thickness thereof can be set as required to meet the requirements of different scenes. It is understood that other structural supporting members, such as compression springs, etc., may be adopted by those skilled in the art, as long as they can support the upper soil clamping plate 1 and can be contracted when the upper soil clamping plate 1 is pressed.
In order to prevent the soil particles from affecting the extension and retraction of the telescopic distance measuring device 4 and the measurement, as a preferable mode, as shown in fig. 1, the outer circumference of the telescopic distance measuring device 4 is sleeved with a soil retaining sleeve 7 for blocking the soil particles, and the soil retaining sleeve 7 is retractable in the vertical direction to avoid affecting the extension and retraction of the telescopic distance measuring device 4. It should be noted that, in this embodiment, the retaining sleeve 7 is sleeved between the telescopic distance measuring device 4 and the supporting sleeve 3, the retaining sleeve 7 is formed by sequentially sleeving a plurality of retaining sub-pipes 71, the top end of the retaining sub-pipe 71 located at the topmost layer is connected to the upper soil clamping plate 1, the bottom end of the retaining sub-pipe 71 located at the bottommost layer is connected to the lower soil clamping plate 2, and the upper soil clamping plate 1 and the lower soil clamping plate 2 can be stably connected through the retaining sleeve 7, so that not only the upper soil clamping plate 1 can be prevented from falling off, but also the relative dislocation and rotation of the upper soil clamping plate 1 and the lower soil clamping plate 2 can be limited. It should be noted that the top end of the soil retaining sub-pipe 71 located at the topmost layer is closed, so as to protect the extending end of the telescopic distance measuring device 4. It will be appreciated that other configurations of the soil retaining sleeve 7 may be used by those skilled in the art, provided that it is capable of retaining soil particles.
In the soil layer thickness real-time measuring device, the telescopic distance measuring device 4 is a distance measuring device for measuring different distances through telescopic variation, and the telescopic variation is the variation of the distance. The telescopic distance measuring equipment 4 is selected from any one of an electronic dial indicator, a dial indicator type resistance strain displacement sensor, a magnetostrictive displacement sensor, a magnetic grating ruler telescopic displacement sensor or a grating ruler telescopic displacement sensor.
In the soil thickness real-time measuring device, the data processing device 6 is arranged for processing the measuring data of the telescopic distance measuring device 4. It should be noted that the data processing device 6 may only include a data display, and the operator may record the measurement data periodically; the data processing device 6 may also only include a data memory, and the measurement data is automatically stored in a timing manner through the data memory, and an operator retrieves the measurement data from the data memory to perform calculation; the data processing device 6 may also include both a data display and a data memory to facilitate the operator in obtaining the measurement data; the data processing device 6 may further include a data transmitter that transmits data to the server through bluetooth, wifi, a mobile communication network, etc. so that the operator can obtain the measurement data. It should be further noted that the data processing device 6 is necessarily provided with a power supply, and details of the power supply are not described herein.
In the soil layer thickness real-time measuring device, the arranged lead 5 is used for connecting the telescopic distance measuring equipment 4 below the earth surface and the data processing equipment 6 above the earth surface so as to transmit the detection result to the earth surface. In order to prevent the wire 5 from being damaged, it is preferable that the wire 5 is peripherally covered with a protective sleeve 8 as shown in fig. 1. It should be noted that the protective sleeve 8 is retractable to adapt to the movement of the wire 5 caused by the sinking of the retractable distance measuring device 4, and when the protective sleeve 8 is made of hard material, the protective sleeve 8 may be formed by sequentially sleeving a plurality of protective sub-tubes 81.
In order to fix the lower soil clamping plate 2 during detection, as a preferred mode, as shown in fig. 1, the lower soil clamping plate 2 is provided with anchoring bolts 9 for embedding in a hard soil layer, and the anchoring bolts 9 are preferably arranged at four corners of the lower soil clamping plate 2, so that the fixation is more stable.
In addition, the lower soil clamping plate 2 is provided with a plurality of holes for reducing the floating pressure of the underground water on the lower soil clamping plate 2 under the condition that the lower soil clamping plate 2 is buried deeply and the pressure of the underground water is high, and preventing the anchoring bolt 9 from being pulled out.
Example 2
The method for measuring the compressive strain of the scattered soil layer by using the real-time soil layer thickness measuring device provided by the embodiment 1 comprises the following steps of: the soil layer thickness real-time measuring device is installed before rolling after filling and leveling of a road or a field, firstly, the soil body is dug to a sufficient depth to meet the requirements of instrument installation and wire 5 laying, an anchoring bolt 9 is embedded into deep hard soil, the wire 5 is laid into a wire 5 ditch and led out of the field, scattered soil filled in the same layer is filled in a space formed between an upper soil clamping plate 1 and a lower soil clamping plate 2, the filled scattered soil is compacted under the same condition as the surrounding soil through rolling, and then, soil covering and leveling are carried out; open telescopic range unit 4 and data processing equipment 6, roll the earth's surface of experimental region, before rolling through telescopic range unit 4 measurement, roll process and roll after the end go up and press from both sides native board 1 and press from both sides the vertical distance between the native board 2 down, measured data transfer to data processing equipment 6, operating personnel acquires measured data through data processing equipment 6, it is the soil layer compression volume to roll the difference between the measured data before the end and roll, divide the soil layer compression volume with the measured data before rolling promptly as the compression strain of the soil layer that awaits measuring.
Example 3
The method for measuring the compressive strain of the soft soil foundation soil layer by using the soil layer thickness real-time measuring device provided by the embodiment 1 comprises the following steps of: drilling according to the planned depth, pressing the soil layer thickness real-time measuring device into the hole to the corresponding depth after lifting the drill, naturally filling soft soil between the upper soil clamping plate 1 and the lower soil clamping plate 2, and measuring and calculating the data of the compressive strain in the same way as in the embodiment 2.
Example 4
The method for measuring the resilience strain of the foundation soil layer by using the soil layer thickness real-time measuring device provided by the embodiment 1 comprises the following steps of: the installation steps of the real-time soil layer thickness measuring device are the same as those of embodiment 3, after the installation is finished, a vehicle or a road roller is used for applying pressure to the earth surface, the vertical distance between the upper soil clamping plate 1 and the lower soil clamping plate 2 is measured by the telescopic distance measuring equipment 4 when the telescopic distance measuring equipment is applied with pressure and is separated from the upper soil clamping plate, the measured data are transmitted to the data processing equipment 6, an operator acquires the measured data through the data processing equipment 6, the difference between the measured data when the telescopic distance measuring equipment is applied with pressure and is the rebound deformation amount of the soil layer, and the rebound deformation amount of the soil layer is divided by the measured data when the.
Example 5
The method for measuring the deformation strain of a plurality of soil layers by using the soil layer thickness real-time measuring device provided by the embodiment 1 comprises the following steps: and drilling according to a planned depth, sequentially pressing a plurality of soil layer thickness real-time measuring devices into the holes to respective corresponding depths after drilling, naturally filling soft soil between the upper soil clamping plate 1 and the lower soil clamping plate 2, performing the data measurement and calculation steps of compressive strain in the same way as in the embodiment 3, and performing the data measurement and calculation steps of rebound strain in the same way as in the embodiment 4.
Example 6
The method for measuring the deformation strain of the soil layer with large thickness by using the real-time soil layer thickness measuring device provided by the embodiment 1 comprises the following steps: sequentially connecting a plurality of soil layer thickness real-time measuring devices in series through pins from top to bottom, removing the anchoring bolts 9 of the soil layer thickness real-time measuring devices except the soil layer thickness real-time measuring device at the lowest layer during connection, drilling according to the planned depth, pressing the soil layer thickness real-time measuring devices connected in series into the holes to the corresponding depth after drilling is lifted, and naturally filling the soil layer between the upper soil clamping plate 1 and the lower soil clamping plate 2 of each soil layer thickness real-time measuring device; the data measurement of the compressive strain is the same as that in the embodiment 3, the total soil layer compression can be obtained by accumulating the soil layer compression measured by the soil layer thickness real-time measuring devices, and the total soil layer compression is divided by the original total thickness of the soil layers before rolling to obtain the compressive strain of the soil layer to be measured; the data measurement of the resilience strain is the same as that of embodiment 4, the total resilience deformation of the soil layer can be obtained after the resilience deformation of the soil layers measured by the real-time soil layer thickness measuring devices is accumulated, and the total resilience deformation of the soil layer is divided by the original total thickness of the soil layers when the pressure is applied, so that the resilience strain of the soil layer to be measured is obtained.
Claims (10)
1. Soil layer thickness real-time measuring device, its characterized in that: the soil layer testing device comprises an upper soil clamping plate and a lower soil clamping plate which is oppositely arranged below the upper soil clamping plate, wherein a space for filling a soil layer to be tested is formed between the upper soil clamping plate and the lower soil clamping plate; a supporting piece for supporting the upper soil clamping plate and telescopic distance measuring equipment for measuring the vertical distance between the upper soil clamping plate and the lower soil clamping plate in real time are arranged in the space; the supporting piece is supported between the upper soil clamping plate and the lower soil clamping plate along the vertical direction, and the supporting piece can be contracted along the vertical direction; the telescopic distance measuring equipment is supported between the upper soil clamping plate and the lower soil clamping plate along the vertical direction, and is telescopic along the vertical direction; the telescopic distance measuring equipment is electrically connected with a lead, the other end of the lead extends to the ground surface and is electrically connected with data processing equipment, and the data processing equipment at least comprises a data display or a data memory.
2. Soil layer thickness real-time measuring device according to claim 1, characterized in that: the top surface of the upper soil clamping plate and the top surface of the lower soil clamping plate are arranged in parallel, the center of the bottom surface of the upper soil clamping plate and the center of the top surface of the lower soil clamping plate are located on the same vertical straight line, the extending end of the telescopic distance measuring equipment is located at the center of the bottom surface of the upper soil clamping plate, and the fixed end of the telescopic distance measuring equipment is located at the center of the top surface of the lower soil clamping plate.
3. Soil layer thickness real-time measuring device according to claim 2, characterized in that: the telescopic range finder is characterized in that a groove is formed in the center of the bottom surface of the upper soil clamping plate, the periphery of the groove is a plane or an inner slope surface or an outer slope surface or an inner plane and outer upward slope or an inner plane and outer downward slope, and the extending end of the telescopic range finder is located in the groove.
4. Soil layer thickness real-time measuring device according to claim 1 or 2, characterized in that: the supporting piece is a supporting sleeve which is sleeved on the periphery of the telescopic distance measuring equipment, the bottom end of the supporting sleeve is connected to the lower soil clamping plate, and the top end of the supporting sleeve is abutted against the bottom surface of the upper soil clamping plate; the supporting sleeve is characterized in that a plurality of tearing lines are arranged on the wall of the supporting sleeve along the direction of a generatrix, the tearing lines are arranged at intervals along the circumferential direction of the supporting sleeve, and the tearing lines extend to the top end of the supporting sleeve so that the top end of the supporting sleeve is split along the tearing lines when being subjected to pressure applied by the upper soil clamping plate.
5. Soil layer thickness real-time measuring device according to claim 1 or 2, characterized in that: telescopic range unit periphery cover is equipped with the soil blocking sleeve pipe that is used for blockking the soil grain, soil blocking sleeve pipe is scalable along vertical direction.
6. Soil layer thickness real-time measuring device according to claim 5, characterized in that: the soil retaining sleeve is formed by sequentially sleeving a plurality of soil retaining sub-pipes, the top end of the soil retaining sub-pipe positioned at the top layer is connected with the upper soil clamping plate, and the bottom end of the soil retaining sub-pipe positioned at the bottom layer is connected with the lower soil clamping plate.
7. Soil layer thickness real-time measuring device according to claim 1 or 2, characterized in that: the telescopic distance measuring equipment is selected from any one of an electronic dial indicator, a dial indicator type resistance strain displacement sensor, a magnetostrictive displacement sensor, a magnetic grating ruler telescopic displacement sensor or a grating ruler telescopic displacement sensor.
8. Soil layer thickness real-time measuring device according to claim 1, characterized in that: and a protective sleeve is sleeved on the periphery of the lead.
9. Soil layer thickness real-time measuring device according to claim 1, characterized in that: the lower soil clamping plate is provided with an anchoring bolt embedded into a hard soil layer.
10. Soil layer thickness real-time measuring device according to claim 9, characterized in that: and a plurality of holes are formed in the lower soil clamping plate.
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|---|---|---|---|---|
| US6386044B1 (en) * | 1999-10-29 | 2002-05-14 | Construction Technology Laboratories, Inc. | Multi-depth deflectometer and method |
| CN202323914U (en) * | 2011-11-08 | 2012-07-11 | 中交天航港湾建设工程有限公司 | Center fixed type sedimentation plate |
| CN105350509B (en) * | 2015-10-10 | 2017-04-26 | 机械工业勘察设计研究院有限公司 | Filing layered sedimentation monitoring device and method |
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2019
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