CN110080193B - Device and method for monitoring layered settlement of soil - Google Patents
Device and method for monitoring layered settlement of soil Download PDFInfo
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- CN110080193B CN110080193B CN201910313294.6A CN201910313294A CN110080193B CN 110080193 B CN110080193 B CN 110080193B CN 201910313294 A CN201910313294 A CN 201910313294A CN 110080193 B CN110080193 B CN 110080193B
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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
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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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- 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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention provides a monitoring device for layered settlement of soil, which comprises a settling tube, a positioning rod and a settlement meter probe, wherein the settling tube comprises a bottom cover and a plurality of flexible telescopic tubes which are sequentially connected, each flexible telescopic tube comprises an upper joint, a foldable corrugated tube and a lower joint which are sequentially connected, one or more settlement magnetic rings are sleeved on the outer wall of the corrugated tube, the upper joint of any flexible telescopic tube is detachably connected with the lower joint of the adjacent flexible telescopic tube, the lower joint of the flexible telescopic tube at the lowest end is connected with the bottom cover, the positioning rod is inserted into the bottom of the settling tube to prop against the bottom cover, so that the settling tube is placed into a monitoring hole, all the corrugated tubes are unfolded, all the settlement magnetic rings move to preset positions in the monitoring hole, and the settlement meter probe is used for placing the settling tube to. The invention has the beneficial effects that: the flexible extension tube and the soil body sink synchronously, so that the influence of friction between the settling magnetic ring and the settling tube is eliminated, and accurate soil layer layered settlement data is obtained.
Description
Technical Field
The invention relates to the field of exploration geotechnical buildings, in particular to a device and a method for monitoring layered settlement of soil.
Background
In the soft soil area, the layered settlement of the soil body is generally monitored to judge whether the engineering characteristics of each soil layer meet the design requirements or not, and the layered settlement is used as a basis for controlling the construction progress, determining the loading and unloading time and evaluating the foundation treatment effect. The commonly used method is a magnetic ring type settlement meter method, namely a flexible ruler settlement meter is matched with a settlement pipe and a settlement magnetic ring to monitor the layered settlement amount of the soft soil foundation. The working mode of the magnetic ring type settlement meter method is as follows: fixing a sedimentation magnetic ring on the outer surface of the sedimentation pipe by using a water-soluble adhesive tape in advance, then pre-burying the sedimentation pipe in a soft soil foundation to be detected, arranging a sealing head at the bottom end of the sedimentation pipe to prevent soil from blocking the sedimentation pipe, and tightly sleeving the sedimentation pipe outside to settle along with a soil layer to be detected, wherein the inner diameter of the sedimentation magnetic ring is slightly larger than that of the sedimentation pipe; after the sedimentation pipe and the sedimentation magnetic rings are embedded, the flexible ruler settlement gauge probe is manually placed into the sedimentation pipe, the flexible ruler is controlled to enable the measuring head to slowly move downwards, when the probe reaches the embedding position of the sedimentation magnetic rings in the soil layers, the instrument can generate a buzzer, the depth reading of the flexible ruler at the pipe opening is manually recorded, namely the length of the sedimentation magnetic ring from the pipe opening, the height of the sedimentation magnetic ring is obtained by subtracting the length measurement value from the height of the pipe opening of the sedimentation pipe, the layered sedimentation amount of each soil layer can be measured by obtaining the height of each sedimentation magnetic ring, the position of the sedimentation magnetic ring is recorded in the roadbed soil body construction process, the state of each layer of the roadbed soil body can be monitored, and valuable data are provided for engineering construction.
In the prior art, the inner diameter of the traditional sedimentation magnetic ring is slightly larger than the outer diameter of the sedimentation pipe, and because the traditional sedimentation pipe is tightly contacted with the sedimentation magnetic ring, the traditional sedimentation pipe can generate an upward friction force to the sedimentation magnetic ring in the process that the sedimentation magnetic ring is sedimented along with the soil layer, and the friction force generated by the traditional sedimentation pipe to the sedimentation magnetic ring can cause that the sedimentation magnetic ring can not be sedimented along with the soil body synchronously, so that the measurement result of the layered sedimentation amount of the soil body often has larger error, and the sedimentation amount of the soil layer to be measured can not be reflected accurately in time. And traditional sedimentation pipe is formed by the union coupling of several sedimentation pipe unit pipes, and the sedimentation pipe unit length generally is 2m, and monitoring depth generally can reach more than 30m, and traditional sedimentation pipe needs take over many times at burying the in-process underground for bury the complicated and work load of in-process underground. Therefore, it is necessary to design a method and a device for monitoring layered settlement of a soil body, so that the influence of friction between a settling pipe and a settling magnetic ring can be eliminated, and the workload in the burying process can be reduced.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a device for monitoring layered settlement of soil.
The embodiment of the invention provides a monitoring device for layered settlement of soil, which comprises a settling tube, a positioning rod and a settlement meter probe, the settling pipe comprises a bottom cover and a plurality of flexible telescopic pipes which are connected in sequence, each flexible telescopic pipe comprises an upper joint, a foldable corrugated pipe and a lower joint which are connected in sequence, one or more settlement magnetic rings are sleeved on the outer wall of the corrugated pipe, the upper joint of any flexible extension pipe is detachably connected with the lower joint of the adjacent flexible extension pipe, the lower joint of the flexible extension pipe at the lowest end is connected with the bottom cover, the positioning rod is inserted into the bottom of the sedimentation pipe to prop against the bottom cover, so that the sedimentation pipe is put into the monitoring hole, and all the corrugated pipes are unfolded and all the sedimentation magnetic rings move to the preset positions in the monitoring holes, the settlement gauge probe is used for being placed into the settlement pipe to monitor the position of each settlement magnetic ring.
Furthermore, the sedimentation pipe comprises a plurality of connecting joints, each connecting joint is of a sleeve structure, an upper limiting hole is formed in the upper end of each connecting joint, a lower limiting hole is formed in the lower portion of each connecting joint, a transverse upper positioning hole is formed in each upper joint, a transverse lower positioning hole is formed in each lower joint, any one upper joint of the flexible telescopic pipe is inserted into the lower end of each connecting joint, the upper positioning holes are aligned with the lower limiting holes and fixed through fasteners, and the lower joint of the adjacent flexible telescopic pipe is inserted into the upper end of each connecting joint, the lower positioning holes are aligned with the upper limiting holes and fixed through fasteners.
Further, the outer diameters of the upper joint and the lower joint are the same, and the outer diameters of the upper joint and the lower joint are the same as the inner diameter of the connecting joint.
Further, the sedimentation pipe comprises a top cover, and the top cover is used for sealing the upper port of the sedimentation pipe.
Further, the bottom cover is a conical cavity.
Furthermore, the corrugated pipe is made of flexible PVC materials, the length of the corrugated pipe is 1.5-2 m, the outer diameter of the corrugated pipe is 6-10 cm, the upper joint and the lower joint are identical in structure, the upper joint is made of rigid PVC materials, the length of the upper joint is 10-14 cm, the outer diameter of the upper joint is 4-8 cm, and the wall thickness of the upper joint is 0.5-1.5 cm.
8. A method for monitoring layered settlement of soil is characterized by comprising the following steps: use of a device for monitoring the stratified settlement of soil according to claim 1, and comprising the steps of:
s1, selecting a proper number of flexible telescopic pipes according to the depth of the monitoring hole, and connecting all the flexible telescopic pipes and the bottom cover into a settling pipe;
s2, stretching the settling tubes to enable the corrugated tube of each flexible expansion tube to be unfolded, fixing a settling magnetic ring on the outer wall of the appointed corrugated tube, and then folding the corrugated tube of each flexible expansion tube;
s3, arranging a positioning pull rope at the upper end of the settling tube, inserting the positioning rod into the settling tube and abutting against the bottom cover, jacking the settling tube to a specified height in a monitoring hole through the positioning rod, keeping the positioning rod still, pulling the positioning pull rope to enable the upper end of the settling tube to reach the opening of the monitoring hole, enabling the corrugated pipe of each flexible telescopic pipe to be unfolded, and enabling each settling magnetic ring to reach a preset position;
s4 filling the monitoring holes to enable the periphery of the settling tube to be fully covered, taking out the positioning rod and putting down a settlement meter probe into the settling tube, wherein the settlement meter probe monitors the distance from each settlement magnetic ring to the empty opening of the monitoring holes.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the monitoring device for soil body layered settlement, after being buried in a soil body in a folded state, the flexible extension tube is upwards stretched to an extended state through external force and then can be stably embedded into a soft soil layer to be detected, the flexible extension tube is attached to a hole wall and then can synchronously sink along with the soil body, and the influence of friction force between the settlement magnetic ring and the settlement tube is eliminated, so that the purpose that the settlement magnetic ring and the soil body to be detected sink synchronously is achieved, accurate data of soil layer layered settlement can be obtained.
Drawings
FIG. 1 is a schematic view of the installation state of a monitoring device for layered settlement of soil according to the present invention;
FIG. 2 is a schematic view of the monitoring state of the soil layered settlement monitoring device of the invention;
FIG. 3 is a schematic view of the flexible telescopic tube 5 of FIG. 1 in a folded state;
FIG. 4 is a schematic view of the flexible bellows 5 of FIG. 1 in an extended state;
FIG. 5 is a schematic view of the connection joint 7 of FIG. 1;
FIG. 6 is a schematic view of the bottom cover 4 of FIG. 1;
FIG. 7 is an enlarged view of a portion of FIG. 1 at A;
FIG. 8 is a schematic view of the overcap 3 of FIG. 1;
in the figure: 1-positioning rod, 2-settlement meter probe, 3-top cover, 4-bottom cover, 5-flexible telescopic pipe, 6-settlement magnetic ring, 7-connecting joint, 8-positioning pull rope, 9-monitoring hole, 10-upper joint, 11-corrugated pipe, 12-lower joint, 13-upper limiting hole, 14-lower limiting hole, 15-connecting hole and 16-fixing hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present invention provides a device for monitoring layered settlement of soil, including a settlement pipe, a positioning rod 1 and a settlement gauge probe 2.
Referring to fig. 3 and 4, the settling pipe includes a top cover 3, a bottom cover 4 and a plurality of flexible telescopic pipes 5 connected in sequence, each flexible telescopic pipe 5 includes an upper joint 10, a foldable corrugated pipe 11 and a lower joint 12 connected in sequence, the upper joint 10 and the lower joint 11 have the same structure, the upper joint 11 is a cylindrical structure, a transverse upper positioning hole is formed in the upper part of the upper joint, a transverse lower positioning hole is formed in the lower part of the lower joint, in this embodiment, the upper joint 10 is made of rigid PVC material, the length is 10 cm-14 cm, the outer diameter is 4 cm-8 cm, and the wall thickness is 0.5 cm-1.5 cm. Bellows 11 is the cavity body, 11 outer wall covers of bellows are equipped with one or more and subside magnetic ring 6, bellows 11 has great extensibility in length direction, and initial condition is compression fold condition (fig. 3 state), can bear certain pulling force and stretch to certain length under the pulling force effect, and can keep certain shape after the stretching not kick-back (fig. 4 state), in this embodiment bellows 11 is flexible PVC material bellows, and length is 1.5m ~ 2m, external diameter 6cm ~ 10 cm.
Referring to fig. 5, the settling tube further includes a plurality of connection joints 7, any two adjacent flexible telescopic tubes 5 are connected by one connection joint 7, the connection joint 7 is of a sleeve structure, the upper end of the connection joint 7 is provided with an upper limit hole 13, the lower part of the connection joint 7 is provided with a lower limit hole 14, the upper joint 10 of any flexible telescopic tube 5 is inserted into the lower end of the connection joint 7, the upper limit hole is aligned with the lower limit hole 14 and fixed by a fastener, the lower joint 11 of the adjacent flexible telescopic tube 5 is inserted into the upper end of the connection joint 7, the lower limit hole is aligned with the upper limit hole 13 and fixed by a fastener, the fastener is a screw or a bolt, so that the upper joint 10 of any flexible telescopic tube 5 is detachably connected with the lower joint 12 of the adjacent flexible telescopic tube, in this embodiment, the connection joint 7 is made of PVC material with high strength, the inner diameter is slightly smaller than the outer diameters of the upper joint 10 and the lower joint 12, so that the upper joint and the lower joint are tightly matched during connection to avoid soil seepage, the length range of the connecting joint 7 is 20 cm-28 m, namely the length of the upper joint 10 or the lower joint 12 is twice, and the wall thickness of a pipe is 0.5 cm-1.5 cm.
Referring to fig. 6 and 7, the lower joint 12 of the flexible extension tube 5 at the lowest end is connected to the bottom cover 4, the bottom cover 4 is a conical cavity, a transverse connecting hole 15 is formed in the upper portion of the bottom cover 4, the connecting hole 15 is matched with a lower positioning hole of the lower joint of the flexible extension tube 5 at the lowest end and is fixedly connected through a screw, in this embodiment, the bottom cover 4 is made of PVC material with high strength, the outer diameter is slightly larger than the inner diameter of the lower joint 12, so that the bottom cover is tightly matched to prevent soil from infiltrating, and the wall thickness of the tube is 0.5 cm-1.5 cm.
Referring to fig. 8, the upper joint 10 of the uppermost flexible extension tube 5 is connected to the top cover 3, the top cover 3 is a circular cover, the side wall of the top cover 3 is provided with a transverse fixing hole 16, the top cover 3 is sleeved on the upper joint 10 to seal the upper port of the settling tube, the fixing hole 16 is matched with the upper positioning hole of the upper joint 10 of the lowermost flexible extension tube 5 and is fixedly connected with the upper joint 10 by a screw, the outer diameter of the top cover 3 is slightly larger than the inner diameter of the upper joint 10, the length range is 10cm to 14cm (which is twice the length of the upper joint), and the wall thickness of the tube wall is 0.5cm to 1.5 cm.
The positioning rod 1 is used for being inserted into the bottom of the sedimentation pipe to prop against the bottom cover 4, so that the sedimentation pipe is placed into the monitoring hole 9, all corrugated pipes 11 are unfolded, all sedimentation magnetic rings 6 move to preset positions in the monitoring hole 9, the settlement gauge probe 3 is used for being placed into the sedimentation pipe to monitor the positions of the sedimentation magnetic rings 6, and in the embodiment, the settlement gauge probe 3 selects a flexible ruler settlement gauge probe.
The embodiment of the invention also provides a method for monitoring the layered settlement of the soil body by using the monitoring device for the layered settlement of the soil body, which comprises the following specific steps:
s1, selecting a proper number of flexible telescopic pipes 5 according to the depth of a monitoring hole 9, connecting all the flexible telescopic pipes 5 and the bottom cover 4 into a settling pipe, wherein the depth of the monitoring hole 9 represents the depth range of a soil layer to be monitored;
s2, stretching the settling tubes to enable the corrugated tube 11 of each flexible expansion tube 5 to be unfolded, calculating the distribution position of the settling magnetic ring 6 according to the monitoring point position, fixing the settling magnetic ring 6 on the outer wall of the specified corrugated tube 11, wherein the settling magnetic ring 6 can be bonded and fixed by water-soluble adhesive tapes, and then folding the corrugated tube 11 of each flexible expansion tube 5;
s3 referring to fig. 1, a positioning pull rope 8 is disposed at the upper end of the settling tube, the positioning rod 1 is inserted into the settling tube and abuts against the bottom cover 4, the settling tube is pushed to a predetermined height in a monitoring hole 9 by the positioning rod 1, then the positioning rod 1 is kept stationary, the positioning pull rope 8 is pulled to make the upper end of the settling tube reach the opening of the monitoring hole 9, the bellows 11 of each flexible telescopic tube 5 is unfolded, and each settling magnetic ring 6 reaches a predetermined position;
s4 referring to fig. 2, filling the monitoring hole 9 with a filler to fully cover the periphery of the settling tube, taking out the positioning rod 1 and placing the settlement gauge probe 3 into the settling tube, fixing the settlement gauge probe 3 and sealing the upper end of the settling tube 3 with the top cover, the settlement gauge probe 3 monitoring the distance (elevation) from each of the settlement magnetic rings 6 to the opening of the monitoring hole 9, each time a soil layer is monitored, each of the settlement magnetic rings 6 embedded in the soil layer will sink synchronously with the soil layer, and the elevation of the settlement magnetic ring 6 is obtained from the elevation of the opening, so that accurate data of the layered settlement of the soil layer can be obtained.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a monitoring devices that soil body layering subsides which characterized in that: comprises a sedimentation pipe, a positioning rod and a sedimentation instrument probe, wherein the sedimentation pipe comprises a bottom cover and a plurality of flexible extension pipes which are connected in sequence, each flexible extension pipe comprises an upper joint, a foldable corrugated pipe and a lower joint which are connected in sequence, one or more settlement magnetic rings are sleeved on the outer wall of the corrugated pipe, the upper joint of any flexible extension pipe is detachably connected with the lower joint of the adjacent flexible extension pipe, the lower joint of the flexible extension pipe at the lowest end is connected with the bottom cover, the positioning rod is inserted into the bottom of the sedimentation pipe to prop against the bottom cover, so that the sedimentation pipe is put into the monitoring hole, and all the corrugated pipes are unfolded and all the sedimentation magnetic rings move to the preset positions in the monitoring holes, and the positioning rod is taken out after the monitoring hole is placed below the sedimentation pipe, and the settlement gauge probe is used for placing the settlement gauge probe into the sedimentation pipe to monitor the position of each settlement magnetic ring.
2. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the sedimentation pipe comprises a plurality of connecting joints, the connecting joints are of a sleeve structure, the upper end of each connecting joint is provided with an upper limiting hole, the lower portion of each connecting joint is provided with a lower limiting hole, each upper joint is provided with a transverse upper positioning hole, each lower joint is provided with a transverse lower positioning hole, any one upper joint of the flexible telescopic pipe is inserted into the lower end of each connecting joint, the upper positioning holes are aligned with the lower limiting holes and fixed by fasteners, and the lower joints of the flexible telescopic pipes are inserted into the upper ends of the connecting joints and the lower positioning holes are aligned with the upper limiting holes and fixed by fasteners.
3. A device for monitoring the stratified settlement of soil as claimed in claim 2, wherein: the outer diameters of the upper joint and the lower joint are the same, and the outer diameters of the upper joint and the lower joint are the same as the inner diameter of the connecting joint.
4. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the sedimentation pipe comprises a top cover, and the top cover is used for sealing the upper port of the sedimentation pipe.
5. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the bottom cover is a conical cavity.
6. The apparatus for monitoring the layered settlement of soil according to claim 1, wherein: the corrugated pipe is made of flexible PVC materials, the length of the corrugated pipe is 1.5-2 m, the outer diameter of the corrugated pipe is 6-10 cm, the upper joint and the lower joint are identical in structure, the upper joint is made of rigid PVC materials, the length of the upper joint is 10-14 cm, the outer diameter of the upper joint is 4-8 cm, and the wall thickness of the upper joint is 0.5-1.5 cm.
7. A method for monitoring layered settlement of soil is characterized by comprising the following steps: use of a device for monitoring the stratified settlement of soil according to claim 1, and comprising the steps of:
s1, selecting a proper number of flexible telescopic pipes according to the depth of the monitoring hole, and connecting all the flexible telescopic pipes and the bottom cover into a settling pipe;
s2, stretching the settling tubes to enable the corrugated tube of each flexible expansion tube to be unfolded, fixing a settling magnetic ring on the outer wall of the appointed corrugated tube, and then folding the corrugated tube of each flexible expansion tube;
s3, arranging a positioning pull rope at the upper end of the settling tube, inserting the positioning rod into the settling tube and abutting against the bottom cover, jacking the settling tube to a specified height in a monitoring hole through the positioning rod, keeping the positioning rod still, pulling the positioning pull rope to enable the upper end of the settling tube to reach the opening of the monitoring hole, enabling the corrugated pipe of each flexible telescopic pipe to be unfolded, and enabling each settling magnetic ring to reach a preset position;
s4 filling the monitoring holes to enable the periphery of the settling tube to be fully covered, taking out the positioning rod and putting down a settlement meter probe into the settling tube, wherein the settlement meter probe monitors the distance from each settlement magnetic ring to the empty opening of the monitoring holes.
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| CN201910313294.6A CN110080193B (en) | 2019-04-18 | 2019-04-18 | Device and method for monitoring layered settlement of soil |
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| CN201910313294.6A CN110080193B (en) | 2019-04-18 | 2019-04-18 | Device and method for monitoring layered settlement of soil |
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| CN110080193B true CN110080193B (en) | 2020-11-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108871509B (en) * | 2018-06-21 | 2024-03-12 | 天津水运工程勘察设计院 | Device and method for measuring underground water level by closed method |
| CN111257537B (en) * | 2020-02-14 | 2021-06-01 | 山东大学(齐河)新材料与智能装备研究院 | Soil settlement layered monitoring device, mounting method and using method |
| CN111254996B (en) * | 2020-03-06 | 2024-05-28 | 长江水利委员会长江科学院 | Rock foundation blasting excavation layered rebound deformation measurement system and method |
| CN112066946B (en) * | 2020-09-24 | 2022-04-15 | 李元勋 | Single-hole layered settlement measuring device and method suitable for indoor model test |
| CN115248027B (en) * | 2021-04-28 | 2023-07-21 | 深圳大学 | Optical fiber sensing monitoring device for soil settlement and settlement measuring method |
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| CN109631832A (en) * | 2018-12-10 | 2019-04-16 | 中交天津港湾工程研究院有限公司 | A kind of soil body delaminating deposition quantity monitoring method |
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| CN2283171Y (en) * | 1997-04-10 | 1998-06-03 | 郭雁 | Pipe coupling |
| CN204252104U (en) * | 2014-11-07 | 2015-04-08 | 天津水运工程勘察设计院 | A kind of device measuring soft foundation delaminating deposition |
| CN108612936A (en) * | 2018-06-28 | 2018-10-02 | 江苏星河集团有限公司 | One kind being easily assembled high-strength bellows |
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