CN204924233U - A device that is used for monitoring surface sheetpile masonry dam to subside most greatly - Google Patents
A device that is used for monitoring surface sheetpile masonry dam to subside most greatly Download PDFInfo
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- CN204924233U CN204924233U CN201520720716.9U CN201520720716U CN204924233U CN 204924233 U CN204924233 U CN 204924233U CN 201520720716 U CN201520720716 U CN 201520720716U CN 204924233 U CN204924233 U CN 204924233U
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Abstract
The utility model relates to a device that is used for monitoring surface sheetpile masonry dam to subside most greatly belongs to concrete panel rock -fill dam dam body and warp technical field. The device includes ABS pipe, electromagnetic type sedimentometer and a plurality of dish that subsides made of iron, made of iron to subside the dish all pre -buried in the rockfill with ABS pipe, the ABS pipe is perpendicular with the dam foundation, and ABS nose end and dam crest are at the coplanar or exceed dam crest, set centre of subsiding made of iron be equipped with the through -hole, the ABS pipe passes from the through -hole that subsides the dish made of iron, and a ABS pipe and set quadrature that subsides made of iron, the gauge head of electromagnetic type sedimentometer to locate ABS intraductal, the gauge head be the magnetism gauge head, set edge ABS that subsides made of iron manages equidistant placing. The utility model discloses according to panel rock -fill dam deformation mechanism, adopt the utility model discloses the device calculates through subsiding calculation empirical formula the most greatly, has overcome the conventional lower shortcoming of computational method survey value reliability of subsiding the most greatly, easily popularizes and applies.
Description
Technical field
The utility model belongs to Concrete Face Rockfill Dam dam deformation technical field, is specifically related to a kind of device for monitoring rock maximum settlement.
Background technology
Current Western Hydroelectricity Developing is mainly at Yalong river valley, Lancang River Watershed, basin, Dadu River, Jinsha jiang River middle and upper reaches, the upper reaches of the Yellow River and Nujiang River Basin etc., in the dam of the current planning construction in these basins, rock-fill dams are in the majority, wherein the building up and have Zi Ping-pu (height of dam 156m), San Banxi (height of dam 179.5m), monkey rock (height of dam 221m), Tianshengqiao-I (height of dam 178m), Shui Buya (height of dam 233m), Hong Jiadu (height of dam 179.5m), theatre (height of dam 155m), Dong Qing (height of dam 150m) etc. building representative rock engineering of more than 100m.Rock-fill dams maximum settlement is the important evidence evaluating design of face slab rockfill dam and construction quality, current rockfill maximum settlement value obtains mainly through two kinds of approach, a kind of approach is obtained by dam safety monitoring analysis, but at present due to the limitation of monitoring technology, rockfill sedimentation is also difficult to monitor, rock-fill dams settlement monitoring is mainly through water-pipe type settlement instrument and electromagnetic type sedimentation ring, water-pipe type settlement instrument causes measured value less than normal due to the hysteresis quality observing room build behind dam, the incoordination that electromagnetic type sedimentation ring is out of shape due to sedimentation ring and rockfill causes measured value to depart from actual value, another kind of approach is by the sedimentation of numerical simulation calculation rock-fill dams, as finite element, discrete element etc., current numerical simulation calculation constitutive model material parameter is shop experiment parameter, impact due to scale effect cause calculating parameter and on-the-spot dam filing parameter far apart, Results of Settlement often necessarily departs from physical presence.Therefore how overcoming the deficiencies in the prior art is problems that current Concrete Face Rockfill Dam dam deformation technical field needs solution badly.
Utility model content
The purpose of this utility model is to solve the deficiencies in the prior art, provides a kind of easy to use, directly can carry out the device of monitoring rock maximum settlement.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
For monitoring a device for rock maximum settlement, comprise ABS pipe, electromagnetic type sedimentometer and multiple iron sedimentation plate, described iron sedimentation plate and ABS pipe are all embedded in rockfill; ABS pipe is vertical with the dam foundation, and ABS pipe top and dam crest are at same plane or exceed dam crest; Be provided with through hole in the middle of described iron sedimentation plate, ABS pipe passes from the through hole of iron sedimentation plate, and ABS pipe is orthogonal with iron sedimentation plate; The gauge head of described electromagnetic type sedimentometer is located in ABS pipe; Described gauge head is magnetic gauge head; Described iron sedimentation plate is equidistantly placed along ABS pipe.
Electromagnetic type sedimentometer is generally located near ABS pipe top, does not have special requirement;
Further, preferably, ABS pipe is arranged on rockfill maximum section axis of dam center.
Further, preferably, described iron sedimentation plate external diameter is greater than 1m, and internal diameter is 16cm.
Further, preferably, described iron sedimentation plate is equidistantly placed along ABS pipe
nindividual iron sedimentation plate (n>=3).
Further, preferably, described ABS pipe external diameter is 15cm, its internal diameter without particular/special requirement, as long as can ensure that the gauge head of electromagnetic type sedimentometer can be measured smoothly.
The utility model also provides a kind of method for monitoring rock maximum settlement, and adopt the above-mentioned device for monitoring rock maximum settlement, concrete grammar is:
When pre-buried iron sedimentation plate, total powerstation is utilized to measure the initial elevation of each iron sedimentation plate;
Use after a period of time until rock, the gauge head of electromagnetic type sedimentometer is put into ABS pipe, measure each iron sedimentation plate elevation, each iron sedimentation plate elevation initial with it subtracts each other the settling amount obtaining this position, iron sedimentation plate place;
Utilize the settling amount of iron sedimentation plate to calculate the average modulus in compression of rockfill, and then calculate each monitoring stage rock maximum settlement according to the experimental formula between the average modulus in compression of rockfill and largest settlement.
Further, preferably, the described method for monitoring rock maximum settlement, comprises the steps:
Step (1), utilizes electromagnetic type sedimentometer to measure the positional information of iron sedimentation plate, and the positional information of iron sedimentation plate comprises on sedimentation plate covers enrockment thickness
, sleeping enrockment thickness under sedimentation plate
with sedimentation plate settling amount
, and obtain enrockment density by the detection of rockfill quality determining method
, by formula (
) calculate the rockfill modulus in compression of each iron sedimentation plate position
;
（
）
In formula
for each sedimentation plate position rockfill modulus in compression, wherein
i=1 ~ n, n are the number of iron sedimentation plate;
Step (2), in step (1), iron sedimentation plate equally distributes along height of dam, and its mean value can be approximately the average modulus in compression of rockfill, utilize formula (
) calculate the average modulus in compression of rockfill
;
（
）
Step (3), utilizes the experimental formula (III) of the average modulus in compression of rockfill and largest settlement to calculate rock largest settlement;
（Ⅲ）
In formula
for rockfill largest settlement,
for maximum height of dam,
for the average modulus in compression of rockfill.
The device for monitoring rock maximum settlement that the utility model provides, pre-buried iron sedimentation plate and ABS pipe is needed when dam filing, in rockfill filling construction, ABS pipe upwards can lengthen Embedment and installation step by step, also can be ABS pipe homogeneous tube Embedment and installation, namely ABS pipe can be one whole, also can be that multistage couples together; But during the situation of multistage, in ABS pipe spreading process, the vertical bury pipe of pipe need be ensured.
When banketing to iron sedimentation plate position, ABS pipe passes from the through hole of iron sedimentation plate, and ABS pipe is orthogonal with iron sedimentation plate, makes iron sedimentation plate can be out of shape synchronous with rockfill;
During monitoring reading, the gauge head of electromagnetic type sedimentometer is put into ABS and manages reading successively.
The gauge head of electromagnetic type sedimentometer described in the utility model is magnetic gauge head, can sense iron sedimentation plate.
In the utility model, the experimental formula of average modulus in compression and largest settlement obtains according to the matching of built typical rock data, and typical rock actual measurement engineering data is as shown in table 1, by modulus in compression average in table 1
height of dam number percent is accounted for largest settlement
use exponential function matching, as shown in Figure 3 both good relationship, and obtain fitting formula (IV):
（Ⅳ）；
Largest settlement
account for height of dam
number percent can be expressed as:
（
）；
By formula (
) substitute into formula (IV) can largest settlement be obtained
computing formula (III):
（Ⅲ）；
In formula
for rockfill largest settlement,
for maximum height of dam,
for the average modulus in compression of rockfill.
Table 1 typical rock actual measurement engineering data
| Project name | Maximum height of dam (m) | Average modulus in compression (MPa) | Maximum settlement (cm) | Maximum settlement accounts for height of dam number percent (%) |
| Tianshengqiao-I rock | 178 | 37.4 | 354 | 1.99 |
| Rock crosses in flood man | 179.5 | 147.6 | 135.6 | 0.76 |
| Three plate small stream rocks | 185.5 | 111.7 | 175.1 | 0.96 |
| Water cloth a strip of land between hills rock | 233 | 118.8 | 247.3 | 1.06 |
| Bar tribute rock | 205 | 96.4 | 227.5 | 1.13 |
| Theatre rock | 155 | 135.9 | 111 | 0.72 |
| Areia's rock | 160 | 32 | 3.58 | 2.2 |
| Plug Gray multi-panel rock-fill dams | 145 | 45 | 2.23 | 1.53 |
| Pungent dagger-axe rock | 140 | 32 | 2.9 | 2.07 |
| Sai Shana rock | 110 | 145 | 0.45 | 0.4 |
Compared with prior art, its beneficial effect is the utility model:
(1) the utility model is based on rockfill deformation mechanism, the analysis of local deformation Monitoring Result is utilized to obtain the average modulus in compression of rockfill, in conjunction with built typical rock actual measurement maximum settlement, set up the experimental formula of rock-fill dams maximum settlement and average modulus in compression, experimental formula is utilized to calculate each monitoring stage rock maximum settlement rapidly, to check the rationality of settlement monitoring achievement and numerical evaluation achievement;
(2) the utility model is according to deformation of concrete face rock-fill dam mechanism, overcomes the shortcoming that conventional maximum settlement computing method measured value reliability is lower, and obtain maximum settlement calculating experimental formula by summing up built engineering, formula is simple and practical.
(3) adopt the utility model device, can greatly shorten maximum settlement monitoring time, compare the monitoring time that classic method shortens 20-30%, and measured value reliability strengthen greatly.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that the utility model is for monitoring the structural representation of the device of rock maximum settlement.
Fig. 2 is the enlarged drawing of part A in Fig. 1;
Fig. 3 is the graph of a relation that the utility model typical heap masonry dam surveys average modulus in compression and settling ratio;
Wherein, 1, monitoring rock; 2, rockfill; 3, iron sedimentation plate; 4, ABS pipe; 5, electromagnetic type sedimentometer; 6, gauge head.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
It will be understood to those of skill in the art that the following example only for illustration of the utility model, and should not be considered as limiting scope of the present utility model.Unreceipted concrete technology or condition person in embodiment, according to the technology described by the document in this area or condition or carry out according to product description.The unreceipted production firm person of material therefor, reagent or instrument, being can by buying the conventional products obtained.
As depicted in figs. 1 and 2, for monitoring the device of rock 1 maximum settlement, comprise ABS pipe 4, electromagnetic type sedimentometer 5 and multiple iron sedimentation plate 3, described iron sedimentation plate 3 and ABS pipe 4 are all embedded in rockfill 2; ABS pipe 4 is vertical with the dam foundation, and ABS pipe 4 top and dam crest are at same plane or exceed dam crest; Be provided with through hole in the middle of described iron sedimentation plate 3, ABS pipe 4 passes from the through hole of iron sedimentation plate 3, and ABS pipe 4 is orthogonal with iron sedimentation plate 3; The gauge head 6 of described electromagnetic type sedimentometer 5 is located in ABS pipe 4; Described gauge head 6 is magnetic gauge head; Described iron sedimentation plate 3 is equidistantly placed along ABS pipe 4, and general iron sedimentation plate equidistantly places 4 iron sedimentation plates along ABS pipe.
Electromagnetic type sedimentometer 5 is generally located near ABS pipe 4 top, does not have special requirement;
Preferred version is that ABS pipe 4 is arranged on rockfill maximum section axis of dam center.
Described iron sedimentation plate 3 external diameter is greater than 1m, and internal diameter is 16cm.ABS pipe 4 external diameter is 15cm, its internal diameter without particular/special requirement, as long as can ensure that the gauge head 6 of electromagnetic type sedimentometer 5 can be measured smoothly.
The device for monitoring rock maximum settlement that the utility model provides, pre-buried iron sedimentation plate 3 and ABS pipe 4 is needed when dam filing, in rockfill filling construction, ABS pipe 4 upwards can lengthen Embedment and installation step by step, also can be ABS pipe 4 homogeneous tube Embedment and installation, namely ABS pipe 4 can be one whole, also can be that multistage couples together; But during the situation of multistage, in ABS pipe 4 spreading process, the vertical bury pipe of pipe need be ensured.
When banketing to iron sedimentation plate 3 position, ABS pipe 4 passes from the through hole of iron sedimentation plate 3, and ABS pipe 4 is orthogonal with iron sedimentation plate 4, makes iron sedimentation plate can be out of shape synchronous with rockfill;
During monitoring reading, the gauge head 6 of electromagnetic type sedimentometer 5 is put into ABS pipe 4 reading successively.
For monitoring a method for rock maximum settlement, adopt device as above, method is:
When pre-buried iron sedimentation plate, total powerstation is utilized to measure the initial elevation of each iron sedimentation plate;
Use after a period of time until rock, the gauge head of electromagnetic type sedimentometer is put into ABS pipe, measure each iron sedimentation plate elevation, each iron sedimentation plate elevation initial with it subtracts each other the settling amount obtaining this position, iron sedimentation plate place;
Utilize the settling amount of iron sedimentation plate to calculate the average modulus in compression of rockfill, and then calculate each monitoring stage wainscot rock-fill dams maximum settlement according to the experimental formula between the average modulus in compression of rockfill and largest settlement.
The described method for monitoring rock maximum settlement, concrete steps be "
Step (1), utilizes electromagnetic type sedimentometer to measure the positional information of 4 iron sedimentation plates, and the positional information of iron sedimentation plate comprises on sedimentation plate covers enrockment thickness
, sleeping enrockment thickness under sedimentation plate
with sedimentation plate settling amount
, and obtain enrockment density by the detection of rockfill quality determining method
, by formula (
) calculate the rockfill modulus in compression of each iron sedimentation plate position
;
（
）
In formula
for each sedimentation plate position rockfill modulus in compression, wherein
i=1 ~ 4;
(2) in step (1), 4 sedimentation plates equidistantly distribute along height of dam, and its mean value can be approximately the average modulus in compression of rockfill, therefore utilize formula (
) calculate the average modulus in compression of rockfill
e;
（
）
(3) experimental formula (III) of the average modulus in compression of rockfill and largest settlement is utilized to calculate largest settlement;
（Ⅲ）
In formula
for rockfill largest settlement,
for maximum height of dam,
for the average modulus in compression of rockfill.
In view of rock maximum settlement presents the trend of increase in time, should change in time and carry out the monitoring of sedimentation plate settling amount at material time point, carry out the calculating of rock maximum settlement according to sedimentation plate settling amount.
Application example
The maximum height of dam 155m of certain rock, installed capacity of power station 2400MW(4 × 600MW), the ABS pipe of 155m is vertically arranged at maximum section axis of dam place, and arrange 1 iron sedimentation plate along ABS pipe is each in the position (hereinafter referred to as " measuring point 1 ~ 4 ") of height of dam 10m, 55m, 100m, 145m, utilize and be with the electromagnetic type sedimentometer of the gauge head that is magnetic to carry out settling amount observation.
From sedimentation plate Embedded installation to dam filing to dam crest time, according to field monitoring achievement, measuring point 1 ~ 4 sedimentation plate settling amount
be respectively 37.5cm, 89.2cm, 93.7cm, 44.1cm, Site Detection is respectively 2.24 to measuring point 1 ~ 4 position rockfill dry density
g/cm 3 , 2.23
g/cm 3 , 2.23
g/cm 3 , 2.21
g/cm 3 , and obtain sedimentation plate covering enrockment thickness according to each sedimentation plate position
, sleeping enrockment thickness under sedimentation plate
, by formula (
) calculate each sedimentation plate position rockfill modulus in compression
e i be respectively 86.6
mPa, 137.5
mPa, 130.8
mPa, 72.6
mPa; According to formula (
) calculate the average modulus in compression of rockfill
ebe 106.9
mPa; Utilize the average modulus in compression of rockfill and largest settlement experimental formula (
) calculate largest settlement
for 156.4cm.Therefore, fill to this rock largest settlement during dam crest be 156.4cm.
The utility model is based on rockfill deformation mechanism, utilize the average modulus in compression of rock maximum section axis of dam place local deformation Monitoring Result analytical calculation rockfill, in conjunction with built typical rock actual measurement maximum settlement, set up the experimental formula of rock-fill dams maximum settlement and average modulus in compression, experimental formula is utilized to calculate each monitoring stage rock maximum settlement rapidly, method simple practical, result of calculation reliability is high.
More than show and describe ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. for monitoring a device for rock maximum settlement, it is characterized in that, comprising ABS pipe, electromagnetic type sedimentometer and multiple iron sedimentation plate, described iron sedimentation plate and ABS pipe are all embedded in rockfill; ABS pipe is vertical with the dam foundation, and ABS pipe top and dam crest are at same plane or exceed dam crest; Be provided with through hole in the middle of described iron sedimentation plate, ABS pipe passes from the through hole of iron sedimentation plate, and ABS pipe is orthogonal with iron sedimentation plate; The gauge head of described electromagnetic type sedimentometer is located in ABS pipe; Described gauge head is magnetic gauge head; Described iron sedimentation plate is equidistantly placed along ABS pipe.
2. the device for monitoring rock maximum settlement according to claim 1, is characterized in that, ABS pipe is arranged on rockfill maximum section axis of dam center.
3. the device for monitoring rock maximum settlement according to claim 1, is characterized in that, described iron sedimentation plate external diameter is greater than 1m, and internal diameter is 16cm.
4. the device for monitoring rock maximum settlement according to claim 1, is characterized in that, described iron sedimentation plate is equidistantly placed along ABS pipe
nindividual iron sedimentation plate, n>=3.
5. the device for monitoring rock maximum settlement according to claim 1, is characterized in that, described ABS pipe external diameter is 15cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520720716.9U CN204924233U (en) | 2015-09-17 | 2015-09-17 | A device that is used for monitoring surface sheetpile masonry dam to subside most greatly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520720716.9U CN204924233U (en) | 2015-09-17 | 2015-09-17 | A device that is used for monitoring surface sheetpile masonry dam to subside most greatly |
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| Publication Number | Publication Date |
|---|---|
| CN204924233U true CN204924233U (en) | 2015-12-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180895A (en) * | 2015-09-17 | 2015-12-23 | 中国电建集团昆明勘测设计研究院有限公司 | Device and method used for monitoring maximum settlement of concrete faced rockfill dam |
| CN114438968A (en) * | 2022-01-12 | 2022-05-06 | 中国电建集团西北勘测设计研究院有限公司 | Horizontal laying construction method for water pipe type settlement gauge of earth and rockfill dam |
-
2015
- 2015-09-17 CN CN201520720716.9U patent/CN204924233U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180895A (en) * | 2015-09-17 | 2015-12-23 | 中国电建集团昆明勘测设计研究院有限公司 | Device and method used for monitoring maximum settlement of concrete faced rockfill dam |
| CN114438968A (en) * | 2022-01-12 | 2022-05-06 | 中国电建集团西北勘测设计研究院有限公司 | Horizontal laying construction method for water pipe type settlement gauge of earth and rockfill dam |
| CN114438968B (en) * | 2022-01-12 | 2023-11-03 | 中国电建集团西北勘测设计研究院有限公司 | Horizontal laying construction method for water pipe type settlement gauge of earth and rockfill dam |
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