CN108708361B - Deep sedimentation monitoring device and method for embedding sedimentation marks - Google Patents
Deep sedimentation monitoring device and method for embedding sedimentation marks Download PDFInfo
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- CN108708361B CN108708361B CN201810691965.8A CN201810691965A CN108708361B CN 108708361 B CN108708361 B CN 108708361B CN 201810691965 A CN201810691965 A CN 201810691965A CN 108708361 B CN108708361 B CN 108708361B
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000012806 monitoring device Methods 0.000 title claims abstract description 29
- 239000000945 filler Substances 0.000 claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 34
- 239000002689 soil Substances 0.000 claims abstract description 29
- 230000003068 static effect Effects 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 238000005056 compaction Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009718 spray deposition Methods 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000002706 hydrostatic effect Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012502 risk assessment Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Classifications
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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)
- Analytical Chemistry (AREA)
- Soil Sciences (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 deep settlement monitoring device which comprises a settlement mark, a static level arranged at the top of the settlement mark and a monitoring device for monitoring settlement data of a rock-soil body, wherein the settlement mark comprises a settlement base and a center rod arranged at the top end of the settlement base, and the monitoring device comprises a data acquisition module connected with the static level and a data monitoring terminal connected with the data acquisition module; the invention also discloses a method for embedding the settlement marks, which comprises the following steps: 1. drilling a buried hole; 2. installing a sedimentation mark, a base protection cover and a protection pipe; 3. treating the filler; 4. performing on-site compaction test on a test hole; 5. and (5) backfilling the buried hole. The deep settlement monitoring device detects the settlement value of the settlement base by using the static level, and the method for embedding the settlement mark can ensure the embedding precision of the settlement mark by carrying out processing filling and on-site compaction test and accurately carrying out layered tamping on the filling backfilled by the layers by using the tamper.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering settlement detection, and particularly relates to a deep settlement monitoring device and a method for embedding a settlement mark.
Background
The settlement detection is an important detection index in geotechnical engineering and is used for engineering risk assessment and prediction. According to engineering requirements, deep or layered settlement of a rock and soil body is often required to be detected, settlement amount is obtained, and a time-dependent change rule of the settlement amount is obtained, so that a basis is provided for design and construction. The prior deep sedimentation detection point has the following problems: 1. the settlement mark base is not protected in the burying process, and particularly in a large-thickness soil filling area, the hole wall collapses or backfill soil is directly covered on the settlement mark base, so that the settlement mark is subjected to the action of an overlying load, and the settlement data is inaccurate. 2. In the process of backfilling or not backfilling the buried hole, because the space between the outer pipe of the subsidence mark and the drilled mark is small, the traditional method is difficult to tamp, in the long-term detection process, the water is affected by rainfall and surface drainage, and the water infiltrates to below the detection point along the buried hole, so that the soil body at the lower part is soaked, concretion sedimentation occurs, and the change rule of the sedimentation quantity along with time and space can not be accurately reflected. The current deep sedimentation monitoring device is adopted to carry out sedimentation detection or layered sedimentation detection in geotechnical engineering, the detection result and the actual value often deviate, the change rule of the sedimentation quantity of the geotechnical body in a normal consolidation state along with time and space cannot be accurately reflected, the engineering requirement is difficult to meet, and the filling of backfill soil into the embedded hole is an important step, so the deep sedimentation monitoring device and the method for embedding the sedimentation mark should be provided.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a deep sedimentation monitoring device which is simple in structure and reasonable in design, a static level gauge is arranged at the top end of a sedimentation monitoring point through embedding the sedimentation mark at the sedimentation monitoring point, the sedimentation mark comprises a sedimentation base and a center rod, a container of the static level gauge is communicated with a reference pipe communicated with the reference pipe embedded at the sedimentation monitoring reference point through a liquid guide pipe, a base protection cover is sleeved on the sedimentation base, the base protection cover is used for protecting the sedimentation base, so that the installation precision of the sedimentation base is ensured, a protection pipe is sleeved on the center rod, the center rod is protected by the protection pipe, the phenomenon of center rod deflection or damage in the embedding process is prevented, and the monitoring precision is accurate and reliable.
In order to solve the technical problems, the invention adopts the following technical scheme: a deep subsidence monitoring device which is characterized in that: including subside the mark, install the hydrostatic level at subside mark top and be used for carrying out the monitoring device who monitors to the ground body subsides data, subside the mark including subside the base and install subside the center pole on the base, subside the cover on the base and be equipped with the base safety cover, the cover is equipped with the pillar on the center pole, the one end of pillar with the base safety cover is connected, the container of hydrostatic level is through the catheter with bury the benchmark pipe intercommunication at the benchmark pipe intercommunication of subside monitoring datum point, monitoring device include with the data acquisition module that the hydrostatic level is connected and with the data monitoring terminal that the data acquisition module carries out radio communication.
Foretell a deep subsidence monitoring devices, its characterized in that: the base protection cover is of a hollow structure, a threaded column connected with one end of the protection pipe is arranged at the top of the base protection cover, and a sedimentation base installation cavity matched with the sedimentation base and a center rod penetrating hole communicated with the sedimentation base installation cavity are formed in the base protection cover.
Foretell a deep subsidence monitoring devices, its characterized in that: the data acquisition module is connected with the data monitoring terminal through the wireless communication module.
Foretell a deep subsidence monitoring devices, its characterized in that: the center pole is formed by splicing a plurality of targets, two adjacent targets are connected through a threaded sleeve, and a static level installation frame is installed at the top end of the center pole.
Foretell a deep subsidence monitoring devices, its characterized in that: the protective tube is formed by splicing a plurality of sub-tubes, two adjacent sub-tubes are connected through a joint, and a blocking cap is arranged at the orifice of the sub-tube close to the static level.
The invention provides a method for embedding a settlement mark, which accurately performs layered tamping on filling materials backfilled in layers by using a tamper, can ensure the embedding precision of the settlement mark, and is characterized in that: the settlement mark comprises a settlement base and a center rod arranged on the settlement base, wherein a base protection cover is sleeved on the settlement base, a protection pipe is sleeved on the center rod, one end of the protection pipe is connected with the base protection cover, a tamping tool adopted in the method is a tamper, the tamper comprises an operation rod, a weighting rod arranged at the bottom end of the operation rod and a tamping plate arranged at the bottom end of the weighting rod, and the tamping plate is of a semicircular structure, and the method comprises the following steps:
step one, drilling a buried hole:
determining the depth and the diameter of a buried hole according to the buried depth of the settlement base and the outer diameter of the base protection cover, drilling the buried hole by using drilling equipment, and cleaning the bottom of the buried hole;
step two, installing a settlement mark, which specifically comprises the following steps:
step 201, after the sedimentation base and the central rod are assembled into a whole, the sedimentation base is extended into the hole bottom of the embedded hole;
step 202, after the base protection cover and the protection pipe are assembled into a whole, the base protection cover is sleeved on the center rod from top to bottom along the center rod, so that the base protection cover is sleeved on the sedimentation base;
step three, treating filler:
sieving the backfill soil by adopting a screen mesh with 10mm to form a filler, so that the water content range of the filler is 14% -20%;
step four, in-situ compaction test of test holes:
drilling a test hole according to the technical parameters of the buried hole, installing a standby base protection cover and a standby protection pipe in the test hole, performing on-site compaction test on the test hole by adopting the tamper, and performing on-site compaction test according to ρ 1 ＝1ρDetermining the number of ramming times and the lifting height of the rammer corresponding to the thickness of the filler of the layered backfill according to the test requirement of 1.1ρ, the thickness of the filler of the virtual backfill and the thickness of the filler of the layered backfill; wherein ρ is 1 Backfilling each layer with the density of the backfill 7 after tamping, wherein ρ is the natural density of the backfill;
fifthly, backfilling the buried hole, which specifically comprises the following steps:
step 501, virtually paving backfill materials into the buried holes according to the thickness of the virtually paving backfill materials determined in the step four;
step 502, backfilling the filling material into the buried hole in layers according to the thickness of the layered backfilled filling material determined in the step four, and tamping the layered backfilled filling material by using the tamper according to the number of times of tamping and the lifting height of the tamper, which are determined in the step four and correspond to the thickness of the layered backfilled filling material, until the buried Kong Tianping is to be buried, wherein the specific tamping process is as follows: the semicircular tamping plate is sleeved on the outer side of the protection tube, and a constructor holds the operating rod to vertically tamp along the protection tube and rotationally tamp 360 degrees along the circumference of the protection tube.
The method for embedding the sedimentation mark is characterized by comprising the following steps of: in the fifth step, the burying condition of the sedimentation base is checked for a plurality of times in the process of backfilling the burying hole, and the specific operation method of checking is as follows: and lifting the central rod upwards, and if the liftable height of the central rod is smaller than the height of the base protection cover, indicating that the base protection cover and the protection pipe are installed in place.
The method for embedding the sedimentation mark is characterized by comprising the following steps of: a rubber pad is arranged on the inner wall of the ramming plate.
The method for embedding the sedimentation mark is characterized by comprising the following steps of: the operating rod is formed by splicing a plurality of operating struts.
The method for embedding the sedimentation mark is characterized by comprising the following steps of: the weighting rod is a solid cast iron rod.
Compared with the prior art, the invention has the following advantages:
1. according to the deep sedimentation monitoring device, the center rod is arranged at the top end of the sedimentation base, the static level gauge is arranged at the top end of the center rod, when the sedimentation base is sedimentated along with a rock-soil body, the static level gauge can measure the sedimentation value of the sedimentation base, the deep part or layered sedimentation of the rock-soil body can be detected, the sedimentation amount or the change rule of the sedimentation amount along with time can be obtained, the base protection cover is sleeved on the sedimentation base, the center rod is sleeved with the protection pipe, the sedimentation base and the center rod can be well protected, the backfilled filler is prevented from affecting the installation precision of the sedimentation base and the center rod in the process of burying the sedimentation base and the center rod, so that the installation precision of the sedimentation base, the center rod and the static level gauge is ensured, and the accuracy of the static level gauge in measuring the sedimentation base is ensured.
2. According to the method for embedding the sedimentation mark, as the backfill soil is thicker, soil blocks, stones and the like with larger diameters can exist in the backfill soil, if the backfill soil is utilized to backfill the embedding holes, the soil blocks and the stones can cause serious damage to the base protection cover and the protection pipe, so that a screen with 10mm of screen holes is needed to screen the backfill soil, particles with the diameter larger than 10mm in the backfill soil are screened out, only particles with the diameter smaller than 10mm are selected as the filler, and the filler is utilized to backfill the embedding holes, so that the base protection cover and the protection pipe cannot be influenced, the installation accuracy of the sedimentation base can be ensured, the operation method is simple, and the use effect is good.
3. According to the method for burying the settlement marks, the filling material treatment and the site compaction test are carried out, and in the process of backfilling the buried holes, the accuracy of the settlement marks is prevented from being influenced in the process of backfilling the buried holes by accurately controlling the layered backfilling thickness, the ramming times of each layer and the lifting height of the rammer.
4. According to the method for embedding the settlement marks, the ramming plate of the rammer is of a semicircular ring structure, and an operator only needs to rotate the ramming plate around the axis direction of the protection pipe, and the rubber pad is arranged on the semicircular inner wall, so that the effect of protecting the PVC protection pipe can be achieved.
5. The invention has simple structure, reasonable design, low manufacturing cost and convenient popularization and application.
In summary, the invention can ensure the installation precision of the settlement base, can avoid the phenomenon of deflection or damage of the central rod in the process of burying, has accurate and reliable monitoring precision, and can ensure the burying precision of the settlement mark and prevent the influence on the precision of the deep settlement monitoring device in the process of backfilling the buried hole by carrying out the treatment of the filler and the on-site compaction test and carrying out accurate layered ramming on the filler backfilled by the rammer.
The invention is described in further detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic diagram of an installation structure of a deep sedimentation monitoring device of the present invention.
Fig. 2 is a schematic block diagram of a monitoring device according to the present invention.
FIG. 3 is a schematic view of a base protection cover according to the present invention.
FIG. 4 is a flow chart of a method for embedding a sedimentation mark according to the present invention.
FIG. 5 is a schematic structural view of the tamper of the present invention.
Fig. 6 is a schematic diagram of a buried sediment mark according to the present invention.
Reference numerals illustrate:
1-a sedimentation base; 2-1, a marker post; 2-a thread sleeve;
3-a static level; 4-a base protective cover; 4-1-a threaded column;
4-2-settling base mounting chamber; 4-3-the central rod passes through the hole; 5-1-sub-tube;
5-2-linker; 5-3, blocking the cap; 6-burying holes;
7-filling; 8-1-an operating strut; 8-2-weighting bar;
8-3-ramming plate; 8-4-rubber pads; 9, a data acquisition module;
10, a data monitoring terminal; 11-a wireless communication module.
Detailed Description
The utility model provides a deep subsidence monitoring devices as shown in fig. 1 and 2, includes the subsidence mark, installs the hydrostatic level 3 at subsidence mark top and is used for carrying out the monitoring device who monitors to the ground body subsides data, the subsidence mark includes subsidence base 1 and installs center pole on the subsidence base 1, the cover is equipped with base safety cover 4 on the subsidence base 1, the cover is equipped with the pillar on the center pole, the one end of pillar with base safety cover 4 is connected, the container of hydrostatic level 3 is through the liquid pipe with bury the benchmark pipe intercommunication of the benchmark pipe intercommunication at subsidence monitoring datum point, monitoring device include with the data acquisition module 9 that the hydrostatic level 3 is connected and with the data monitoring terminal 10 that the data acquisition module 9 carries out radio communication.
When the system is in practical use, the settlement mark is buried at a settlement monitoring point, the static level gauge 3 is installed at the top end of the settlement mark, the settlement mark comprises a settlement base 1 and a central rod installed at the top end of the settlement base 1, a container of the static level gauge 3 is communicated with a reference pipe which is buried in the reference pipe of the settlement monitoring reference point through a liquid guide pipe, in practical use, before the settlement of rock and soil at any settlement monitoring point, the liquid level height detected by the static level gauge 3 at the settlement monitoring point is consistent with the liquid level height buried in the reference pipe of the settlement monitoring reference point, after the settlement of rock and soil at any settlement monitoring point, the liquid level height detected by the static level gauge 3 at the settlement monitoring point is lower than the liquid level height in the reference pipe, the difference between the detected liquid level height and the liquid level height in the reference pipe is displayed through a numerical value, the numerical value displayed by each static level gauge 3 is acquired by the data acquisition module 9, and the numerical value displayed by each static level gauge 3 is transmitted to the data acquisition terminal 10, and the data acquisition and prediction module is stored and forecast.
In this embodiment, as shown in fig. 3, the base protection cover 4 is of a hollow structure, a threaded column 4-1 connected with one end of the protection pipe is arranged at the top of the base protection cover 4, and a sedimentation base installation cavity 4-2 matched with the sedimentation base 1 and a central rod penetrating hole 4-3 communicated with the sedimentation base installation cavity 4-2 are arranged inside the base protection cover 4.
In this embodiment, one end of the protection tube is screwed with the threaded column 4-1.
In this embodiment, the static leveling instrument is an inductance frequency modulation type YT-DG-0300 series static leveling instrument, and in actual use, the static leveling instrument for settlement monitoring may also use a single-point settlement gauge, and the selectable single-point settlement gauge is a YT-DG-0100 series single-point settlement gauge.
In this embodiment, the data monitoring terminal 10 is a computer, the data acquisition module 9 is a data acquisition unit, and the model of the data acquisition unit is YT-ZD-0308, and in actual use, other models of data acquisition units may be used.
In this embodiment, the data acquisition module 9 is connected to the data monitoring terminal 10 through a wireless communication module 11.
In this embodiment, the wireless communication module 11 is a 3G communication module, a 4G communication module, or a WIFI communication module.
In this embodiment, the center pole is formed by splicing a plurality of targets 2-1, two adjacent targets 2-1 are connected through a thread bush 2-2, and a static level installation frame is installed at the top end of the center pole.
In this embodiment, since the center rod is formed by splicing a plurality of targets 2-1, and two adjacent targets 2-1 are connected through the threaded sleeve 2-2, the center rod can be quickly installed and removed, and is convenient to store and transport.
In this embodiment, the protection tube is formed by splicing a plurality of sub-tubes 5-1, two adjacent sub-tubes 5-1 are connected through a joint 5-2, and a blocking cap 5-3 is arranged at the orifice of the sub-tube 5-1 close to the static level 3.
In this embodiment, the sub-pipe 5-1, the joint 5-2 and the blocking cap 5-3 are all made of PVC.
In this embodiment, the protection tube is formed by splicing a plurality of sub-tubes 5-1, and two adjacent sub-tubes 5-1 are connected by a joint 5-2, which aims at: the protective tube can be quickly installed and detached, is convenient to store and carry, and only one sub-tube 5-1 needs to be replaced instead of the whole protective tube when any one of the sub-tubes 5-1 is damaged, so that the cost is saved.
A method for embedding a settlement mark as shown in fig. 4 to 6, wherein the settlement mark comprises a settlement base 1 and a center rod arranged on the settlement base 1, a base protection cover 4 is sleeved on the settlement base 1, a protection pipe is sleeved on the center rod, one end of the protection pipe is connected with the base protection cover 4, a tamping tool adopted in the method is a tamper, the tamper comprises an operation rod, a weighting rod 8-2 arranged at the bottom end of the operation rod and a tamping plate 8-3 arranged at the bottom end of the weighting rod 8-2, and the tamping plate 8-3 is of a semicircular ring structure, and the method comprises the following steps:
step one, drilling a buried hole:
determining the depth and the diameter of the embedded hole 6 according to the embedded depth of the settlement base 1 and the outer diameter of the base protection cover 4, drilling the embedded hole 6 by using drilling equipment, and cleaning the bottom of the embedded hole 6;
step two, installing a settlement mark, which specifically comprises the following steps:
step 201, after the sedimentation base 1 and the central rod are assembled into a whole, the sedimentation base 1 is extended into the bottom of the embedded hole 6;
step 202, after the base protection cover 4 and the protection pipe are assembled into a whole, the base protection cover 4 is sleeved on the center rod from top to bottom along the center rod, so that the base protection cover 4 is sleeved on the sedimentation base 1;
step three, treating filler:
sieving the backfill soil by adopting a screen mesh with 10mm to form a filler 7, so that the water content range of the filler 7 is 14% -20%;
in this embodiment, since the backfill soil has thicker soil, and there are larger soil blocks and stones, etc. in the backfill soil, if these backfill soil are utilized to fill the hole, these soil blocks and stones will cause serious damage to the base protection cover 4 and the protection pipe, therefore, the backfill soil needs to be screened by adopting a screen with a screen mesh of 10mm, the particles with a diameter greater than 10mm in the backfill soil are screened, only the particles with a diameter less than 10mm are selected as the filler 7, and the filler 7 is reused to fill the hole 6, so that the installation accuracy of the sedimentation base 1 can be ensured, the operation method is simple, and the use effect is good.
Step four, in-situ compaction test of test holes:
with reference to the technical parameters of the buried hole 6, a test hole is drilled, a standby base protection cover 4 and a standby protection pipe are installed in the test hole, the tamper is adopted to perform an on-site compaction test on the test hole, and the test hole is subjected to a rho 1 Test requirements of =1ρ to 1.1ρ, thickness of the virtually paved backfill filler 7, and thickness of the layered backfill filler 7, the number of ramming times and height of the tamper lifting corresponding to the thickness of the layered backfill filler 7 are determined; wherein ρ is 1 Backfilling each layer with the density of the tamped filler 7, wherein ρ is the natural density of the filler 7;
in this embodiment, the working condition in the buried hole 6 is simulated by installing the spare base protection cover 4 and the spare protection pipe into the test hole, the tamper is adopted to perform the on-site compaction test on the test hole of the test hole, the range of the thickness value of the filler 7 of the virtual backfill is determined to be 25 cm-35 cm, if the thickness of the filler 7 of the virtual backfill is less than 25cm, when the filler 7 of the layered backfill is performed after the filler 7 of the virtual backfill is paved, the base protection cover 4 is easily damaged when the filler 7 of the layered backfill is tamped; if the thickness of the filler 7 of the virtual backfill is greater than 35cm, when the filler 7 of the layered backfill is performed after the filler 7 of the virtual backfill, the bottom of the filler 7 of the layered backfill is difficult to tamp, thereby affecting the test result.
In this embodiment, the determination is made by the in-situ compaction test: when the thickness value of the filler 7 of the layered backfill is 10cm, the density ρ after the backfill is tamped 1 =1ρ to 1.1ρ, the tamper lifting height to be taken should be 30cm to 40cm, and the number of times of tamping should be 15 times;
when the thickness value of the filler 7 of the layered backfill is 15cm, the density ρ after the backfill is tamped 1 =1ρ to 1.1ρ, the height of the tamper lift to be taken is 40cm, and the tamper is tampedThe number of times should be 24 times;
fifthly, backfilling the buried hole, which specifically comprises the following steps:
step 501, virtually paving backfilled filler 7 into the buried hole 6 according to the thickness of the virtually paved backfilled filler 7 determined in the step four;
step 502, backfilling the filling material 7 into the buried hole 6 in layers according to the thickness of the backfilled filling material 7 determined in the step four, and tamping the backfilled filling material 7 into layers by using the tamper according to the number of times of tamping and the lifting height of the tamper, which are determined in the step four and correspond to the thickness of the backfilled filling material 7, until the buried hole 6 is filled, wherein the tamping process comprises the following steps: the semicircular tamping plate 8-3 is sleeved on the outer side of the protective tube, and a constructor holds the operating rod to vertically tamp along the protective tube and rotationally tamp 360 degrees along the circumferential direction of the protective tube.
In actual use, the depth range of the embedded hole 6 is 2 m-30 m; in this embodiment, the depth of the buried hole 6 is 2m, the thickness value of the filler 7 of the virtual backfill is 30cm, when the thickness value of the filler 7 of the layered backfill is 10cm, the number of layers of the layered backfill is 17, in order to protect the PVC protection pipe, the lifting height of the tamper is 30cm, and the number of ramming times is 20.
In the present embodiment, in the fifth step, the burying condition of the settlement base 1 is inspected for multiple times in the process of backfilling the buried hole, and the specific operation method of the inspection is as follows: and (3) lifting the central rod upwards, wherein if the liftable height of the central rod is smaller than the height of the base protection cover 4, the base protection cover 4 and the protection pipe are installed in place.
In practical use, since the installation accuracy of the sedimentation base 1 directly influences the accuracy of deep sedimentation detection, in order to check whether the sedimentation base 1 is pressed, the burying condition of the sedimentation base 1 should be checked multiple times in the process of backfilling the buried hole, for example, one check is performed after the backfill 7 is virtually paved, one check is performed after the backfill 7 is backfilled twice in each layer in the process of backfill 7, not only the fixation firmness of the sedimentation base 1 is ensured, but also the phenomenon that the installation position of the sedimentation base 1 is displaced by the backfill 7 cannot occur.
In the embodiment, the ramming plate 8-3 at the bottom end of the weighting rod 8-2 is in a semicircular structure, so that in actual use, an operator only needs to rotate the ramming plate 8-3 around the axis direction of the settlement mark base 2, the operation is simple, and the use effect is good.
In this embodiment, the thickness of the tamper plate 8-3 is 25mm.
In this embodiment, a rubber pad 8-4 is provided on the inner wall of the tamper plate 8-3.
Because subside and cover the PVC protection tube on the mark base 2, in the in-process of ramming backfill filler 7, in order to prevent ramming board 8-3 from causing the damage to the PVC protection tube, consequently, in this embodiment, through set up rubber pad 8-4 on the inner wall of semicircle annular, can play the effect of protection PVC protection tube, excellent in use effect.
In this embodiment, the action bars are formed by a plurality of operation branch 8-1 concatenation, splice through selecting the operation branch 8-1 of different quantity, can splice the action bars that form different length, can satisfy the user demand of the degree of depth of different buried holes, dismouting and transport convenience.
In actual use, the length of the operation support rod 8-1 is 1 m-6 m, and the operation support rod 8-1 is a galvanized steel pipe.
In this embodiment, the weighting rod 8-2 is a solid cast iron rod, and the weight of the rammer is increased, so that the impact force applied to the backfill filler 7 by the rammer can be improved.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (7)
1. A deep subsidence monitoring device which is characterized in that: the settlement mark comprises a settlement mark body, a static level (3) arranged at the top of the settlement mark body and a monitoring device for monitoring settlement data of a rock-soil body, wherein the settlement mark body comprises a settlement base (1) and a central rod arranged on the settlement base (1), a base protection cover (4) is sleeved on the settlement base (1), a protection pipe is sleeved on the central rod, one end of the protection pipe is connected with the base protection cover (4), a container of the static level (3) is communicated with a reference pipe buried at a settlement monitoring reference point through a liquid guide pipe, and the monitoring device comprises a data acquisition module (9) connected with the static level (3) and a data monitoring terminal (10) in wireless communication with the data acquisition module (9);
the base protection cover (4) is of a hollow structure, a threaded column (4-1) connected with one end of the protection pipe is arranged at the top of the base protection cover (4), and a sedimentation base installation cavity (4-2) matched with the sedimentation base (1) and a center rod penetrating hole (4-3) communicated with the sedimentation base installation cavity (4-2) are formed in the base protection cover (4);
the protective tube is formed by splicing a plurality of sub-tubes (5-1), two adjacent sub-tubes (5-1) are connected through a joint (5-2), and a blocking cap (5-3) is arranged at the tube orifice of the sub-tube (5-1) close to the static level (3);
the sub-pipe (5-1), the joint (5-2) and the plugging cap (5-3) are all made of PVC.
2. A deep sedimentation monitoring device as claimed in claim 1, characterized in that: the data acquisition module (9) is connected with the data monitoring terminal (10) through the wireless communication module (11).
3. A deep sedimentation monitoring device as claimed in claim 1, characterized in that: the center pole is formed by splicing a plurality of targets (2-1), two adjacent targets (2-1) are connected through a thread bush (2-2), and a static level installation frame is installed at the top end of the center pole.
4. A method for embedding a sedimentation mark, which is characterized by comprising the following steps: the settlement mark comprises a settlement base (1) and a center rod arranged on the settlement base (1), a base protection cover (4) is sleeved on the settlement base (1), a protection pipe is sleeved on the center rod, one end of the protection pipe is connected with the base protection cover (4), a tamping tool adopted in the method is a tamper, the tamper comprises an operation rod, a weighting rod (8-2) arranged at the bottom end of the operation rod and a tamping plate (8-3) arranged at the bottom end of the weighting rod (8-2), and the tamping plate (8-3) is of a semicircular structure, and the method comprises the following steps:
step one, drilling a buried hole:
determining the depth and the diameter of the embedded hole (6) according to the embedded depth of the settlement base (1) and the outer diameter of the base protection cover (4), drilling the embedded hole (6) by using drilling equipment, and cleaning the bottom of the embedded hole (6);
step two, installing a settlement mark, which specifically comprises the following steps:
step 201, after the sedimentation base (1) and the central rod are assembled into a whole, the sedimentation base (1) is extended into the hole bottom of the embedded hole (6);
step 202, after the base protection cover (4) and the protection pipe are assembled into a whole, the base protection cover (4) is sleeved on the center rod from top to bottom along the center rod, so that the base protection cover (4) is sleeved on the sedimentation base (1);
step three, treating filler:
sieving the backfill soil by adopting a screen mesh with 10mm to form a filler (7), so that the water content range of the filler (7) is 14% -20%;
step four, in-situ compaction test of test holes:
drilling a test hole with reference to the technical parameters of the embedded hole (6), installing a standby base protection cover (4) and a standby protection pipe in the test hole, and performing an on-site compaction test on the test hole by adopting the tamper according to ρ 1 Test requirements of =1ρ to 1.1ρ, thickness of the virtually paved backfilled filler (7) and thickness of the layered backfilled filler (7), and number of ramming and height of the tamper lifting corresponding to the thickness of the layered backfilled filler (7) are determined; wherein ρ is 1 Backfilling each layer with the density of the tamped filler (7), wherein ρ is the natural density of the filler (7);
fifthly, backfilling the buried hole, which specifically comprises the following steps:
step 501, virtually paving backfilled filler (7) into the buried hole (6) according to the thickness of the virtually paved backfilled filler (7) determined in the step four;
step 502, backfilling the filling material (7) into the buried hole (6) in a layered manner according to the thickness of the filling material (7) which is determined in the step four, and tamping the backfilled filling material (7) in the layered manner by using the tamper according to the number of times of tamping and the lifting height of the tamper which are determined in the step four and correspond to the thickness of the filling material (7) which is backfilled in the layered manner until the buried hole (6) is filled, wherein the tamping process comprises the following steps: the semicircular tamping plate (8-3) is sleeved on the outer side of the protective tube, a constructor holds the operating rod to vertically tamp along the protective tube and rotationally tamp 360 degrees along the circumferential direction of the protective tube;
in the fifth step, the burying condition of the sedimentation base (1) is checked for a plurality of times in the process of backfilling the buried holes, and the specific operation method of the check is as follows: and (3) lifting the central rod upwards, and if the liftable height of the central rod is smaller than the height of the base protection cover (4), indicating that the base protection cover (4) and the protection pipe are installed in place.
5. A method of embedding a settlement mark as set forth in claim 4, wherein: a rubber pad (8-4) is arranged on the inner wall of the ramming plate (8-3).
6. A method of embedding a settlement mark as set forth in claim 4, wherein: the operating rod is formed by splicing a plurality of operating struts (8-1).
7. A method of embedding a settlement mark as set forth in claim 4, wherein: the weighting rod (8-2) is a solid cast iron rod.
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| CN109403300A (en) * | 2018-12-12 | 2019-03-01 | 中国矿业大学(北京) | A kind of bilayer soil body sedimentation monitoring system and its installation method |
| CN110029648A (en) * | 2019-03-26 | 2019-07-19 | 昆明理工大学 | A kind of deep settlement measurement device and application method for deep Backfill Foundation |
| CN113218350A (en) * | 2021-05-15 | 2021-08-06 | 柴庆刚 | Highway engineering high-fill abutment back of body bridgehead attachment gap monitoring forecasting device that comes to nothing |
| CN113514029A (en) * | 2021-06-29 | 2021-10-19 | 武汉武建机械施工有限公司 | Novel foundation pit soil body layered settlement device and construction method thereof |
| CN114739359B (en) * | 2022-04-20 | 2023-08-15 | 广州市城市规划勘测设计研究院 | Automatic monitoring device for soil settlement and installation method thereof |
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