CN101545847A - Method and device for laser settlement observation - Google Patents
Method and device for laser settlement observation Download PDFInfo
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- CN101545847A CN101545847A CN200910031235A CN200910031235A CN101545847A CN 101545847 A CN101545847 A CN 101545847A CN 200910031235 A CN200910031235 A CN 200910031235A CN 200910031235 A CN200910031235 A CN 200910031235A CN 101545847 A CN101545847 A CN 101545847A
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Abstract
The invention relates to a method and a device for laser settlement observation, which are used for measuring the settlement of a building foundation during the construction. A settlement point is embedded in a container which is internally provided with a small inner pipe communicated with a vertical observation pipe embedded outside a building; water filled in a pipeline overflows from the top of the inner pipe; when the container subsides, the inner pipe subsides along with the container, water overflows, and water level in the observation pipe descends; and the top of the inner pipe is always level to the water level of the observation pipe, so the water level change of the observation pipe is equal to the settlement quantity of the container. A laser settlement meter outside the building is used for measuring the water level change which is the settlement of the building foundation. The key to obtain the accurate settling amount measuring result is to ensure that no bubbles exist in water of the system, and the invention provides a series of methods and corresponding devices to obtain the accurate settling amount measuring result. A device ensures that a laser beam passes through the center line of the observation pipe, thereby ensuring enough precision observation.
Description
Affiliated technical field
The present invention relates to the laser settlement observation method and apparatus, particularly be used for traffic and construction work measure sedimentation at work progress method and apparatus.
Technical background
Traffic and construction work in work progress much sedimentations can take place and how sedimentation develops in time, is that the engineering staff extremely pays close attention to.This only carries out field measurement.At present the on-the-spot settlement observation method that generally adopts in the engineering is to bury settlement plate, on connect the sedimentation mark, the variation of measuring its height with spirit-leveling instrument.If the point that will measure sedimentation can't use spirit-leveling instrument under buildings, the use of this method just is restricted.As measure the sedimentation of Highway Foundation, and to fill out on from level to level with embankment, mark post also must one connects height successively.This not only bothers, and main is disturbs construction, and near banket can not compacting, so must improvement.
Summary of the invention
In order to overcome the shortcoming of settlement plate method, a kind of pipe system of imbedding in the ground has been proposed, the settlement issues of observation station (as road-center place under the embankment) ground is transformed to the measurement problem of water level outside the road, measures the water level conversion at road external application laser range finder again, be the sedimentation of asking.
Concrete scheme is: apparatus system shown in Figure 1 is by settlement point container (1), and sighting tube (2), and connects their pipeline composition.Wherein establish pipe (3) in the settlement point container.Put settlement point container (1) (in the road as highway) in the position of intending the survey sedimentation, sighting tube (2) is put in the place (as the roadside outside the Expressway Embankment) of disturbing not constructed.The lower end with the interior pipe (3) in nylon hose and the settlement point container, the lower end of sighting tube is connected, is water inlet pipe; The sighting tube upper end also is connected with nylon hose with the upper end of settlement point container, is snorkel.By sighting tube (2) water-filling, overflow until the interior pipe (3) from the settlement point container.The upper end has snorkel to connect, and both equate by air pressure.There is cap sighting tube upper end, makes that generally system is airtight, and water does not have evaporation.When the container A sedimentation, water overflows from tubule (3), and its water level remains on the top of pipe always.Because pipe (3) is communicated with pipe (2), the water level in the pipe (2) is equal with pipe (3) end face.Like this, pipe (2) middle water level slippage just equals container (1) settling amount S, measures the problem of some sedimentations in the embankment, just become the problem that measures embankment External Observation pipe middle water level, and sighting tube (2) middle water level changes the sedimentation that equals container (1).
On pipe (2) water surface, place the sheet floating thing.From the pipe top laser beam is got to the floating thing surface with hand-held laser rangefinder, can record water level.In order to make laser beam not depart from the axial line of sighting tube, guides is set to place stadimeter.
Said method records is relative settlement between settlement point and the sighting tube.Sighting tube can be embedded in the position that sedimentation can not take place, and what then record is exactly actual sedimentation.If near no fixed point, sighting tube may sedimentation, then measures the sighting tube sedimentation in addition.Both sums are the actual settling amount of settlement point.Sighting tube outside the building, settlement measurement is easy.
Guaranteeing that the water in this system is always air free water, is the key that obtains accurate settling amount measuring result.Because the water dissolvable air, when the settlement point container sinks, and when being lower than a certain section of water supply hose, this Duan Shuizhong is a negative pressure, and air overflows the formation bubble from water, just can not holding tube the balance of water level on both sides of the road, principle shown in Figure 1 just lost efficacy.Guarantee method that water in this system is always air free water comprise following some:
(1) clean water was boiled 3 minutes, cooling.Unless the unsuitable long storage time of cold boiling water is no air and airtight in the container.
When (2) cold boiling water changes another tank over to by a container, can not pour into.Can in air, form water column when pouring into, air is brought in the water.Have special suction tube (8), see Fig. 2, water is sucked the water storage cylinder (7) from the bottom.When water storage cylinder (7) is injected sighting tube (2) with water, must be by water pipe from sighting tube bottom water outlet, as shown in Figure 3.Water delivering orifice progressively is submerged in the water of sighting tube.
(3) after pipe system was poured water, it is thick that oil is poured on the sighting tube water surface about 1mm, prevents that air from entering and be dissolved in the water from the water surface.
Beneficial effect
(1) because system imbeds undergroundly, do not disturb construction.Can be used under any buildings, in the buildings,, be particularly useful for the occasion that directly to use spirit-leveling instrument to measure as under the Expressway Embankment, under the tank foundation, under the building, in the underground structure etc.Be widely used.
(2) precision is higher, and error is the mm level.
(3) with hand-held laser range finder observation, easy to operate.To the requirement that measures personnel's technical quality far below using spirit-leveling instrument, so the misoperation possibility reduces greatly.
Description of drawings
Fig. 1, the signal of pipe system principle
Fig. 2, water absorber
Fig. 3, water filling device
Fig. 4, the observed result of application example
(1) settlement point container among the figure
(2) sighting tube
(3) pipe in
(4) snorkel
(5) water inlet pipe
(6) embankment
(7) water storage cylinder
(8) suction tube
Embodiment
Below in conjunction with accompanying drawing invention is described further.
In the device, settlement point container (1) is cylindric, makes high 17cm, external diameter 11cm with duroplasts.Be the square plastic plate up and down, Qi Sijiao is porose, and screw rod passes, to clamp pipe.Between pipe and upper and lower plates, be provided with O-ring seal, make container obtain sealing.Stretch out plastics tubule (3) on the container floor, its lower end is embedded with pipe joint.Also be embedded with pipe joint on the container top board.Other buries drainage joint underground at perforate on the base plate.
Sighting tube (2) is long 1.5m, external diameter 4cm, plastic round tube.Going to the bottom is the cylindrical plastic piece, with the pipe gluing.Be embedded with pipe joint in the circle unit of plastic.The cap that the sighting tube upper end has circular duroplasts to make.Be embedded with pipe joint on the cap.
Intend surveying the some borehole of sedimentation under the on-the-spot embankment of highway, about deeply 55cm buries settlement point container (1) underground; Outside embankment, about the dark 1.4cm of borehole, bury sighting tube (2) underground.Sighting tube (2) about 10cm that bassets.Two hole horizontals distances is decided on situation on the spot.The dark 40cm of grooving between two holes.With the 8mm nylon hose end connector under the sighting tube and settlement point container (1) bottom fitting are coupled together, be water inlet pipe (5).With the 8mm nylon hose joint on sighting tube (2) cap and settlement point container (1) top sub are coupled together, be snorkel (4).Water inlet pipe (3) and snorkel (4) are all put into soil box.
Annotate air free water from the observation mouth of pipe, overflow until the little water pipe from the settlement point container, and flow out from freeing port.
The sheet floating thing is put into sighting tube.Measure the sighting tube water level with laser range finder.
With observation station container landfill,, the sighting tube landfill is extremely only exposed 10cm with soil with water pipe in the soil box and tracheae landfill.
After treating the stable level in the system, survey water level with laser range finder again.Write down initial reading.
Build the sighting tube cap.
Open the sighting tube cap at different time later on, with stadimeter survey water level wherein.The difference of it and initial reading is corresponding settling amount.
This device was once used in Binjiang main road, Nanjing vacuum preloading joint preloading method treatment of soft foundation engineering.Settlement point container and sighting tube are made with hard plastic tube, and water inlet pipe, snorkel and drainpipe all adopt nylon tube.Bury 4 covering devices altogether underground, divide at two sections.Every section is respectively established a cover from the center, road about the 28m of roadside with under the curb about the 14m of roadside.The water inlet pipe range is that 14m to 29m does not wait.In order to contrast, near each settlement point container, be equipped with settlement plate with sedimentation mark spirit-leveling instrument observed result.Fig. 4 is the observed result of one of them point.Other observed result of 3 also substantially so.Practical engineering application shows that this device and method for measurement are reasonable, and observation is convenient, not disturbed by construction, and precision is higher.
Claims (2)
1. the laser settlement observation method and apparatus is made up of settlement point container, sighting tube and pipeline, it is characterized in that:
1) pipe in is set in the settlement point container;
2) lower end of sighting tube is connected with the lower end of the interior interior pipe of nylon hose and settlement point container;
3) upper end of sighting tube also is connected with nylon hose with the upper end of settlement point container.
2. the laser settlement observation method is as follows:
1) device is installed when burying underground, and the settlement point container is placed on the position of intending surveying sedimentation, and sighting tube is placed on without interruption, the position of easy observation;
2) inject air free water from the sighting tube upper end and overflow, again oil is poured on an about millimeters thick on the sighting tube water surface until interior pipe from the settlement point container;
3) place the sheet floating thing on the sighting tube water surface, the light beam of laser range finder is got to the floating thing surface from the top can record water level, obtains sedimentation through conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910031235A CN101545847A (en) | 2009-04-29 | 2009-04-29 | Method and device for laser settlement observation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910031235A CN101545847A (en) | 2009-04-29 | 2009-04-29 | Method and device for laser settlement observation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101545847A true CN101545847A (en) | 2009-09-30 |
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ID=41193106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910031235A Pending CN101545847A (en) | 2009-04-29 | 2009-04-29 | Method and device for laser settlement observation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101545847A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620715A (en) * | 2012-04-16 | 2012-08-01 | 河海大学 | Observation method of foundation settlement based on liquid level difference |
| CN103591928A (en) * | 2013-11-07 | 2014-02-19 | 河南理工大学 | Method for measuring elevation of deep mine |
-
2009
- 2009-04-29 CN CN200910031235A patent/CN101545847A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620715A (en) * | 2012-04-16 | 2012-08-01 | 河海大学 | Observation method of foundation settlement based on liquid level difference |
| CN103591928A (en) * | 2013-11-07 | 2014-02-19 | 河南理工大学 | Method for measuring elevation of deep mine |
| CN103591928B (en) * | 2013-11-07 | 2015-07-08 | 河南理工大学 | Method for measuring elevation of deep mine |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090930 |