CN109579658B - Device and method for monitoring layered settlement of high-fill soil body - Google Patents
Device and method for monitoring layered settlement of high-fill soil body Download PDFInfo
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- CN109579658B CN109579658B CN201910070943.4A CN201910070943A CN109579658B CN 109579658 B CN109579658 B CN 109579658B CN 201910070943 A CN201910070943 A CN 201910070943A CN 109579658 B CN109579658 B CN 109579658B
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- 239000002689 soil Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 91
- 239000010959 steel Substances 0.000 claims abstract description 91
- 238000012806 monitoring device Methods 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000004062 sedimentation Methods 0.000 claims description 50
- 238000010276 construction Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- General Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (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)
Abstract
The invention discloses a layered settlement monitoring device and a layered settlement monitoring method for a high-fill soil body, which belong to the technical field of settlement monitoring in geotechnical engineering and comprise a plurality of layers of sleeves sleeved in sequence from inside to outside, wherein in two adjacent layers of sleeves, the axial two ends of an inner sleeve respectively penetrate out from the axial corresponding ends of an outer sleeve, steel drills penetrate through the innermost sleeve, and the lower end of the outer wall of each layer of sleeve in the multi-layer sleeve is symmetrically provided with a pair of settlement plates; and dividing scales are axially arranged on the outer wall of each layer of sleeve and the outer wall of the steel drill rod in the multi-layer sleeve, and the settlement of each settlement plate is judged based on the reading difference of each dividing scale. The method comprises the steps of driving steel drills into a soil layer with high strength, wherein the steel drills are in a plumb state; performing layered backfilling and rolling, sleeving the sleeve on the steel drill rod, and recording the initial difference value of the graduated scale between each layer of sleeve and the top of the steel drill rod; repeating the above operation until the backfilling rolling is completed. The device has the advantages of simple structure, reasonable and reliable method, applicability to different soil environments, simple process, convenient operation and lower cost.
Description
Technical Field
The invention relates to the technical field of settlement monitoring in geotechnical engineering, in particular to a device and a method for monitoring layered settlement of a high-fill soil body.
Background
In recent years, along with continuous implementation of a series of construction projects such as highways, railways, airports, water conservancy and hydropower projects and the like in China, more projects encounter high-fill projects. In order to grasp the settlement amount, settlement difference and stability of the filled soil body, settlement observation is required for the filling engineering. A layered settlement meter (layered settlement meter) is generally used for observing the layered settlement of the soil body. However, after the backfilling of the high-fill area is finished, observation points are drilled in the filled soil, only the sedimentation data of the upper part of the backfilled foundation can be observed, the sedimentation amount of each height in the backfilling process can not be monitored, and further the compaction degree of the high-fill soil body can not be mastered, so that potential safety hazards exist.
At present, for monitoring the layered settlement of a high-fill soil body, after the device is integrally buried in the fill soil body, the plumb degree of the device is difficult to be effectively ensured, and if the uneven settlement is inclined, the accuracy of monitoring the vertical settlement value is greatly reduced. It can be seen that there is a need for a method and apparatus for monitoring the layered settlement of high fill soil which eliminates the effects of inclination.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides a device and a method for monitoring the layered settlement of a high-fill soil body, which have the advantages of simple structure, convenient construction, adaptation to different soil environments, effective maintenance of the plumb characteristic of the device and improvement of the settlement monitoring precision.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
High fill soil body layering subsides monitoring devices, its characterized in that: the multi-layer sleeve comprises a plurality of layers of sleeves which are sleeved in sequence from inside to outside, wherein in the inner sleeve and the outer sleeve of adjacent layers, two axial ends of the inner sleeve respectively penetrate out from the axial corresponding ends of the outer sleeve, steel drills penetrate through the sleeve of the innermost layer, and the lower end of the outer wall of each sleeve of the plurality of layers of sleeves is symmetrically provided with a pair of sedimentation plates; and graduated scales are axially arranged on the outer wall of each layer of sleeve and the outer wall of the steel drill rod in the multi-layer sleeve, and the settlement of each settlement plate is judged based on the reading difference of each graduated scale.
The high fill soil body layering subsides monitoring devices, its characterized in that: the steel drill and the outer wall of each sleeve are respectively provided with two guide ribs which are symmetrically arranged along the axial direction; two guiding convex edges on the outer wall of each sleeve are mutually perpendicular to the straight line where a pair of sedimentation plates are located, and guiding sliding grooves matched with the convex edges are arranged on the inner wall of each sleeve.
The high fill soil body layering subsides monitoring devices, its characterized in that: the length of the guide rib on the outer wall of the steel drill is smaller than that of the steel drill, and the length of the guide rib on the outer wall of each sleeve is smaller than that of each sleeve.
The high fill soil body layering subsides monitoring devices, its characterized in that: and stiffening ribs are connected with the outer side wall of each layer of sleeve in the multi-layer sleeve and the upper end surface of the sedimentation plate.
The high fill soil body layering subsides monitoring devices, its characterized in that: the inner diameter of the outer sleeve is larger than or equal to the outer diameter of the inner sleeve.
The high fill soil body layering subsides monitoring devices, its characterized in that: the inner diameter of the innermost sleeve in the multi-layer sleeve is larger than or equal to the outer diameter of the steel drill rod.
The high fill soil body layering subsides monitoring devices, its characterized in that: the zero scale marks of the graduated scales of the multi-layer sleeve and the steel drill are positioned above, wherein the zero scale marks of the graduated scales of each sleeve are coplanar with the top surface of the sleeve, and the zero scale marks of the obtained steel drill graduated scales are positioned at one section of the lower part of the steel drill head.
The high fill soil body layering subsides monitoring devices, its characterized in that: the length of the steel drill is greater than that of the sleeve at the innermost layer, and the lengths of the sleeves are sequentially reduced from inside to outside.
A layered settlement monitoring method of a layered settlement monitoring device for a high-fill soil body is characterized by comprising the following steps of: the method comprises the following steps:
(1) Driving steel drills on a filling engineering site where the monitoring device is to be arranged, so that the bottoms of the steel drills enter a soil layer with high strength, and the steel drills are in a plumb state;
(2) The method comprises the steps of carrying out layered backfilling and rolling, sleeving an innermost sleeve on a steel drill rod when filling to an observation point at the bottom, closely contacting a sedimentation plate at the bottom of the sleeve with soil, and recording an initial difference value between the sleeve and a zero scale line of a scale on the steel drill rod;
(3) Continuously carrying out layered backfilling and rolling, sleeving a corresponding sleeve on the steel drill rod when filling to a second observation point, tightly contacting a sedimentation plate at the bottom of the sleeve with soil body, and simultaneously recording an initial difference value between the sleeve and a zero scale line of a scale on the steel drill rod;
(4) Continuously backfilling and rolling in layers, repeatedly operating according to the steps (2) - (3) until backfilling and rolling are completed, and adjusting the included angle between the upper layer sedimentation plate and the lower layer sedimentation plate of each sleeve according to actual conditions when the steel bars and the outer wall of each sleeve are not provided with guide ribs, so as to adapt to soil layers with different uniformity; when the steel drill rod and the outer walls of the sleeves are provided with the guide ribs, the sedimentation plates of the outer walls of the adjacent upper and lower sleeves are mutually perpendicular, and the guide ribs are suitable for soil layers with good uniformity, so that the steel drill rod is always in a plumb state in the backfilling process.
The method for monitoring the layered settlement of the high-fill soil body is characterized by comprising the following steps of: after the steel drills and the sleeves are buried into the soil, the top end of the outermost sleeve is higher than the soil filling surface, the top end heights of the sleeves are sequentially reduced from inside to outside, and the top end of the steel drills is higher than the top end of the innermost sleeve.
Compared with the prior art, the invention has the advantages that:
1. In the actual construction process, the angle of the sedimentation plate on the outer wall of each layer of sleeve can be effectively adjusted according to the actual soil conditions, the invention is suitable for different soil environments, and the plumb characteristic of the steel drill rod in the measurement process is further increased;
2. The invention has simple structure and convenient manufacture, the visible steel drill is a fixed reference object which does not displace any more, the sedimentation value of each sedimentation plate can be obtained rapidly based on the reading difference of the scale marks on each sleeve and the steel drill, a measuring instrument is not needed, and the reading is convenient and the efficiency is high;
3. The construction process is reasonable and reliable, layered observation of a plurality of vertical observation points in the backfilling process is realized, continuous tracking observation can be realized after the completion, the process is simple, the operation is convenient, and the cost is low;
4. After the steel drills are vertically driven into the foundation stabilization layer, the steel drills play a role in restraining each sleeve, the plumb characteristic of each sleeve is maintained, sedimentation of each sedimentation pipe and each sedimentation plate is ensured to occur only along the plumb direction, and the monitoring precision of vertical sedimentation is greatly improved.
Drawings
Fig. 1 is a schematic view of a sleeve structure without guide ribs according to the present invention.
Fig. 2 is a schematic view of the structure of the projection coincidence of the settlement plates of the sleeves of each layer when the uniform soil layer is used.
Fig. 3 is a cross-sectional view of fig. 2 in accordance with the present invention.
FIG. 4 is a schematic view of the construction of the present invention for driving drill steel into a hard earth formation along plumb lines.
Figure 5 is a schematic view of the construction of the drill rod of the present invention sleeved in the first sleeve.
FIG. 6 is a schematic view of the construction of the first sleeve of the present invention after the completion of the first layer of filling.
FIG. 7 is a schematic view of the construction of the second sleeve of the present invention after the second filling is completed.
FIG. 8 is a schematic view of the third layer of the present invention after filling the soil and sleeved in the fourth sleeve.
FIG. 9 is a schematic view of the structure of the present invention filled to the final elevation.
Fig. 10 is a view showing the sleeve structure with guide ribs according to the present invention.
Fig. 11 is a schematic view of a drill steel structure having guide ribs according to the present invention.
Fig. 12 shows the structural intention of the sleeve settlement plates of each layer at an angle when the invention is used on different soil layers.
FIG. 13 is a schematic view showing the structure of adjacent sedimentation plates with guide ribs perpendicular to each other.
Reference numerals illustrate: 1. a sleeve; 2. a sedimentation plate; 3. stiffening ribs; 4. steel drill rod; 5. a graduated scale; 6. a guide rib; A. backfilling an initial elevation surface; B. a first layer of earth filling surface; C. a second layer of earth filling surface; D. a third layer of soil filling surface; E. backfilling the final elevation surface.
Detailed Description
The invention will be further described with reference to the drawings (scale marks in figures 1, 4, 10, 11, and the remainder omitted).
The high-fill soil body layered settlement monitoring device comprises a plurality of layers of sleeves 1 which are sleeved in sequence from inside to outside, wherein in the inner and outer adjacent layers of sleeves, the axial two ends of the inner sleeve respectively penetrate out from the axial corresponding ends of the outer sleeve, steel bars 4 penetrate through the sleeve of the innermost layer, and the lower end of the outer wall of each layer of sleeve in the multi-layer sleeve is symmetrically provided with a pair of settlement plates 2; and graduated scales 5 are axially arranged on the outer wall of each layer of sleeve and the outer wall of the steel drill rod in the multi-layer sleeve, and the settlement of each settlement plate is judged based on the reading difference of each graduated scale 5.
The steel drill and the outer wall of each sleeve are respectively provided with two guide ribs 6 which are symmetrically arranged along the axial direction; two guiding convex edges on the outer wall of each sleeve are mutually perpendicular to the straight line where a pair of sedimentation plates are located, and the inner wall of each sleeve is provided with a guiding chute 7 matched with the convex edges.
The length of the guide convex rib 6-1 on the outer wall of the steel drill is smaller than that of the steel drill, and the length of the guide convex rib 6-2 on the outer wall of each sleeve is smaller than that of each sleeve.
The outer side wall of each layer of sleeve 1 in the multi-layer sleeve and the upper end face of the sedimentation plate 2 are connected with stiffening ribs 3, so that the overall strength and rigidity are improved.
The inner diameter of the outer sleeve is larger than or equal to the outer diameter of the inner sleeve.
The inner diameter of the innermost sleeve in the multi-layer sleeve is larger than or equal to the outer diameter of the steel drill rod 4.
The zero scale mark of the scale of the multi-layer sleeve and the steel drill is positioned above, wherein the zero scale mark of the scale of each sleeve is coplanar with the top surface of the sleeve, and the zero scale mark of the scale on the steel drill 4 is positioned at one section of the lower part of the steel drill hammer.
The length of the steel drill 4 is greater than that of the innermost sleeve, the steel drill has enough length and rigidity, and needs to be driven into a soil layer with higher strength, so that the influence of subsequent filling on the plumb degree of the steel drill is reduced as much as possible. After the steel drill 4 is vertically driven into the foundation stabilization layer, the steel drill plays a role in restraining each sleeve, maintains the plumb characteristic of each sleeve, ensures that each sedimentation pipe and each sedimentation plate only sink along the plumb direction, and greatly improves the monitoring precision of vertical sedimentation.
The length of each sleeve 1 is sequentially reduced from inside to outside, and the embedding depth of each sleeve from outside to inside of the sedimentation plate 2 is sequentially increased.
A layered settlement monitoring method of a layered settlement monitoring device for a high-fill soil body comprises the following steps:
(1) Driving steel bars 4 into a filling engineering site where a monitoring device is to be arranged, so that the bottoms of the steel bars 4 enter a soil layer with high strength, the steel bars 4 are in a plumb state, and the steel bars 4 are visible as fixed references which are not displaced any more;
(2) When filling to the observation point at the bottommost part, sleeving the sleeve at the innermost layer on the steel drill rod, closely contacting a sedimentation plate at the bottom of the sleeve with soil, and recording the initial difference value of the graduated scale between the sleeve zero graduation line and the steel drill rod zero graduation line;
(3) Continuously carrying out layered backfilling and rolling, sleeving corresponding sleeves on the steel bars when filling to a second observation point, tightly contacting a sedimentation plate at the bottom of the sleeve with soil, and simultaneously recording the initial difference value of the graduated scale between the sleeve zero graduation line and the steel bar zero graduation line;
(4) Continuously backfilling and rolling in layers, repeatedly operating according to the steps (2) - (3) until backfilling and rolling are completed, and adjusting the included angle between the upper layer sedimentation plate and the lower layer sedimentation plate of each sleeve according to actual conditions when the steel bars and the outer wall of each sleeve are not provided with guide ribs, so as to adapt to soil layers with different uniformity; when the steel drill rod and the outer walls of the sleeves are provided with the guide ribs, the sedimentation plates of the outer walls of the adjacent upper and lower sleeves are mutually perpendicular, and the guide ribs are suitable for soil layers with good uniformity, so that the steel drill rod is always in a plumb state in the backfilling process.
After the steel drills 4 and the sleeves 2 are buried into the soil, the top ends of the outermost sleeves are higher than the soil filling surface, the top ends of the sleeves are sequentially lowered from inside to outside, and the top ends of the steel drills are higher than the top ends of the innermost sleeves.
After the steel drills and the sleeves are buried into the soil, the top ends of the steel drills are not lower than 100mm of the top ends of the sleeves at the innermost layer, the top ends of the sleeves at the outermost layer are not lower than 300mm of the soil filling surface, the heights of the top ends of the sleeves are sequentially reduced from inside to outside, and the intervals between the top ends of the adjacent sleeves are not smaller than 50mm.
The invention is mainly used for filling engineering, and each sleeve is buried while filling in the filling process. The traditional sedimentation monitoring device is to drill holes in soil bodies and then to bury the holes after filling engineering is finished.
On the premise of confirming that the plumb degree of the steel rod 4 meets the requirement, the steel rod 4 is a fixed reference object which is not displaced any more, the initial scale reading difference between each sleeve and the steel rod is recorded, the subsequent change value of the sleeve reading difference is the actual sedimentation value of the corresponding sedimentation plate, the sedimentation value of each sedimentation plate can be obtained rapidly, and the reading is convenient and the efficiency is high.
In the filling process, measures are taken to reduce the disturbance influence of filling construction on the buried deep sedimentation pipe and the steel drill rod, and the plumb characteristic of the device is maintained.
The drawings only show the partial shape and partial connection mode of the sedimentation tube and the sedimentation plate, and the shape and connection mode of the sedimentation tube and the sedimentation plate can be changed according to the proposed thought, for example, a round sedimentation plate is arranged, so that other related types of layered sedimentation monitoring devices are formed, which all belong to equivalent modification and change of the technology and are not repeated here.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar components; the terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present patent.
The present invention is not limited to the above-described embodiments, and according to the above-described matters, the present invention may be modified, replaced or altered in various equivalent ways without departing from the basic technical spirit of the present invention, all of which fall within the scope of the present invention, according to the general technical knowledge and conventional means in the art.
Claims (5)
1. The utility model provides a high fill soil body layering subsides monitoring devices which characterized in that: the multi-layer sleeve comprises a plurality of layers of sleeves which are sleeved in sequence from inside to outside, wherein in the inner sleeve and the outer sleeve of adjacent layers, two axial ends of the inner sleeve respectively penetrate out from the axial corresponding ends of the outer sleeve, steel drills penetrate through the sleeve of the innermost layer, and the lower end of the outer wall of each sleeve of the plurality of layers of sleeves is symmetrically provided with a pair of sedimentation plates; dividing scales are axially arranged on the outer wall of each layer of sleeve and the outer wall of the steel drill rod in the multi-layer sleeve, and the settlement of each settlement plate is judged based on the reading difference of each dividing scale;
The steel drill and the outer wall of each sleeve are respectively provided with two guide ribs which are symmetrically arranged along the axial direction; two guide convex edges on the outer wall of each sleeve are mutually perpendicular to the straight line where a pair of sedimentation plates are positioned, and the inner wall of each sleeve is provided with a guide chute matched with the convex edges;
The length of the guide convex rib on the outer wall of the steel drill is smaller than that of the steel drill, and the length of the guide convex rib on the outer wall of each sleeve is smaller than that of each sleeve;
An inner diameter of the outer sleeve is larger than or equal to an outer diameter of the inner sleeve;
The zero graduation lines of the graduated scales of the multi-layer sleeve and the steel drill are positioned above, wherein the zero graduation lines of the graduated scales of each sleeve are coplanar with the top surface of the sleeve, and the zero graduation lines of the graduated scales on the steel drill are positioned at the lower section of the steel drill head;
the length of the steel drill is greater than that of the sleeve at the innermost layer, and the lengths of the sleeves are sequentially reduced from inside to outside.
2. The high fill soil mass layered settlement monitoring device according to claim 1, wherein: and stiffening ribs are connected with the outer side wall of each layer of sleeve in the multi-layer sleeve and the upper end surface of the sedimentation plate.
3. The high fill soil mass layered settlement monitoring device according to claim 1, wherein: the inner diameter of the innermost sleeve in the multi-layer sleeve is larger than or equal to the outer diameter of the steel drill rod.
4. A method for monitoring the layered settlement of the high fill soil layered settlement monitoring device as claimed in claim 1, wherein: the method comprises the following steps:
(1) Driving steel drills on a filling engineering site where the monitoring device is to be arranged, so that the bottoms of the steel drills enter a soil layer with high strength, and the steel drills are in a plumb state;
(2) The method comprises the steps of carrying out layered backfilling and rolling, sleeving an innermost sleeve on a steel drill rod when filling to an observation point at the bottom, closely contacting a sedimentation plate at the bottom of the sleeve with soil, and recording an initial difference value between the sleeve and a zero scale line of a scale on the steel drill rod;
(3) Continuously carrying out layered backfilling and rolling, sleeving a corresponding sleeve on the steel drill rod when filling to a second observation point, tightly contacting a sedimentation plate at the bottom of the sleeve with soil body, and simultaneously recording an initial difference value between the sleeve and a zero scale line of a scale on the steel drill rod;
(4) Continuously carrying out layered backfilling and rolling, repeatedly operating according to the steps (2) - (3) until backfilling and rolling are completed, and adjusting the included angle between the upper layer sedimentation plate and the lower layer sedimentation plate of each sleeve according to actual conditions when the steel bars and the outer wall of each sleeve are not provided with guide ribs so as to adapt to soil layers with different uniformity; when the steel drill rod and the outer walls of the sleeves are provided with the guide ribs, the sedimentation plates of the outer walls of the adjacent upper and lower sleeves are mutually perpendicular, and the guide ribs are suitable for soil layers with good uniformity, so that the steel drill rod is always in a plumb state in the backfilling process.
5. The layered settlement monitoring method of claim 4, wherein: after the steel drills and the sleeves are buried into the soil, the top end of the outermost sleeve is higher than the soil filling surface, the top end heights of the sleeves are sequentially reduced from inside to outside, and the top end of the steel drills is higher than the top end of the innermost sleeve.
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| CN201910070943.4A CN109579658B (en) | 2019-01-25 | 2019-01-25 | Device and method for monitoring layered settlement of high-fill soil body |
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| CN201910070943.4A CN109579658B (en) | 2019-01-25 | 2019-01-25 | Device and method for monitoring layered settlement of high-fill soil body |
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| CN110306608A (en) * | 2019-06-19 | 2019-10-08 | 武汉中科岩土工程有限责任公司 | Overhead section of pile foundation settlement monitoring device of subway and monitoring method |
| CN110595414A (en) * | 2019-09-27 | 2019-12-20 | 徐州中国矿大岩土工程新技术发展有限公司 | Rock-soil body layered monitoring mark and construction method |
| CN112523190B (en) * | 2020-12-30 | 2022-08-09 | 河南鲁禹水利工程有限公司 | Flood control pile foundation detection device |
| CN112523192B (en) * | 2020-12-30 | 2022-03-01 | 台州市路汇建设有限公司 | Steel chisel for flood control pile foundation detection |
| CN112665549B (en) * | 2021-01-08 | 2022-07-05 | 武汉理工大学 | Geotechnical engineering roadbed settlement automatic monitoring system and monitoring method |
| CN114837157A (en) * | 2022-04-29 | 2022-08-02 | 安徽省路桥工程集团有限责任公司 | Test instrument capable of monitoring layered settlement |
| NL2033261B1 (en) * | 2022-10-07 | 2024-04-19 | Deltalot B V | Reusable settlement plate system |
| WO2024074720A1 (en) * | 2022-10-07 | 2024-04-11 | Deltaiot B.V. | Reusable settlement plate system |
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