CN103363904A - Measuring device and measuring method for layering horizontal displacement of base pit enclosing structure - Google Patents
Measuring device and measuring method for layering horizontal displacement of base pit enclosing structure Download PDFInfo
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- CN103363904A CN103363904A CN2013102618555A CN201310261855A CN103363904A CN 103363904 A CN103363904 A CN 103363904A CN 2013102618555 A CN2013102618555 A CN 2013102618555A CN 201310261855 A CN201310261855 A CN 201310261855A CN 103363904 A CN103363904 A CN 103363904A
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Abstract
The invention provides a measuring device and a measuring method for layering horizontal displacement of a base pit enclosing structure. The measuring device comprises a relative displacement measuring device and an absolute displacement measuring device; the relative displacement device comprises a first wire-fixing device fixedly mounted on the side face of a first enclosing structure, a first laser distance measuring sensor mounted on the first wire-fixing device, and a displacement refractive sheet mounted on a second enclosing structure; the absolute displacement measuring device comprises a second wire-fixing device mounted on the top face of the first enclosing structure, a second laser distance measuring sensor mounted on the second wire-fixing device and a reference refractive sheet outside a base pit; the first and second wire-fixing devices comprise a base ball socket internally provided with a ball socket, and a ball head rotor in spherical match with the ball socket respectively; the ball head rotors are fixedly connected with the first and second laser distance measuring sensors; and locking devices are arranged between the ball socket and the ball head rotors. The measuring device is simple in structure, is simple and fast in measuring process and is high in measuring precision.
Description
Technical field
The present invention relates to a kind of device and method for base pit engineering building enclosure different depth place horizontal shift measurement.Particularly relating to a kind of foundation pit enclosure structure both sides is measurement mechanism and the measuring method that the foundation pit enclosure structure horizontal shift is carried out in substantially parallel situation lower leaf.
Background technology
In the Foundation Pit Construction process, the horizontal shift at foundation pit enclosure structure different depth place is the main evaluation index of base pit engineering security, thereby is the main monitoring project in the foundation pit construction process.
The place's horizontal shift of foundation pit enclosure structure different depth is generally measured with tiltmeter by bury inclinometer pipe underground in building enclosure after.Inclinometer pipe is buried complexity underground, the measurement cost is high, measurement result is unstable, so precision is difficult to guarantee.Also have some researchs of measuring based on the horizontal shift to foundation pit enclosure structure different depth place of laser distance measuring principle both at home and abroad, the device that these researchs relate to all has complicated structure, perhaps larger size.During whole measurement, all need the stationary installation of laser range sensor is installed on every one deck foundation pit enclosure structure, be easy to be subject to blasting vibration and mechanical collision, thereby affect measuring accuracy, even also may make measurement mechanism be broken.In addition, some laser range sensors are owing to limit by the structure of stationary installation, the installation position of measuring point and instrument is equipped with particular requirement, otherwise the Laser emission end can't find impact point to be measured.Because every survey line all will be installed corresponding laser range finder stationary installation when measuring, consumption is large, and expense is high, thereby do not have can widespread use in engineering reality.
The measuring method of existing foundation pit enclosure structure layering horizontal shift mainly contains axis method, minor angle method, total station instrument coordinate method of changing etc., front two kinds of methods adopt transit and steel ruler to measure, the total station instrument coordinate method of changing is measured angle and distance simultaneously by total powerstation, utilizes reduction formula to calculate the horizontal shift value of foundation pit enclosure structure.Above various measuring method has certain drawback, axis method and minor angle method are higher to site requirements, the basic point of its surveying work to be selected in apart from foundation ditch nearby, in Excavation Process substantially motionless point, if the distance of basic point choice is longer, the steel ruler reading accuracy that reads from transit is just lower.Although total station instrument coordinate method of changing measuring accuracy is high, its measuring process is loaded down with trivial details, measures cost high.
Summary of the invention
The shortcoming of prior art in view of the above, the technical problem to be solved in the present invention provide a kind of measurement mechanism of foundation pit enclosure structure layering horizontal shift simple in structure, easy for installation and the measuring method that measuring process is simple and efficient, the measurement result precision is high.
Reach for achieving the above object other relevant purposes, the invention provides a kind of measurement mechanism of foundation pit enclosure structure layering horizontal shift, described foundation pit enclosure structure comprises the first building enclosure and the second building enclosure that is positioned at the foundation ditch both sides, and described first, second building enclosure includes collar tie beam and enclosure wall.Measurement mechanism provided by the invention comprises a relative displacement measurement mechanism and an absolute displacement measuring apparatus, and described relative displacement measurement mechanism comprises the first alignment device of being fixedly mounted on the first building enclosure side, be installed in the first laser range sensor on described the first alignment device and be installed in displacement reflecting piece on the second building enclosure; Described absolute displacement measuring apparatus comprises the second alignment device of being fixedly mounted on the first building enclosure end face, is installed in the second laser range sensor and a benchmark reflecting piece on the second alignment device, the benchmark reflecting piece is fixedly installed on the datum of described the first building enclosure one side, described first, second alignment device includes a pedestal, be provided with a ball-and-socket in the pedestal, ball-and-socket cooperates with a bulb rotor sphere, the bulb rotor is fixedly connected with described first, second laser range sensor, also is provided with locking device between described ball-and-socket and the described bulb rotor.
Preferably, be fixed with screw on the bulb rotor, be connected by described screw between described first, second laser range sensor and the described bulb rotor.
Preferably, described locking device is the lock-screw that is installed on the described pedestal, and the head of described lock-screw exposes to described pedestal, and the afterbody of described lock-screw stretches in the described ball-and-socket.
Preferably, described the first alignment device is fixedly mounted on by the first setscrew on the side of collar tie beam of described the first building enclosure; Described the second alignment device is fixedly mounted on by the second setscrew on the end face of collar tie beam of described the first building enclosure.
Preferably, the end of described first, second setscrew all has screw thread, and described screw thread has regular length.
Preferably, all be connected with external triggering line and external trigger button on described first, second laser range sensor.
Preferably, described reference point is to more than or equal to the described excavation of foundation pit degree of depth 5 times of the distance of described the second laser range sensor.
The present invention also provides a kind of measuring method of foundation pit enclosure structure layering horizontal shift, may further comprise the steps: the selected reference point, with described the second laser range sensor installation place as the benchmark measuring point, measure described reference point to the distance value l of described benchmark measuring point with the second laser range sensor according to survey frequency, according to survey frequency, each measured value l
jWith first measured value l
0Difference be the abswolute level shift value Δ l of described benchmark measuring point
j, Δ l
j=| l
j-l
0|, wherein j represents to measure number of times, j=0,1,2
With the installation place of described the first laser range sensor as working base point, excavation along with described each layer of foundation ditch, on corresponding each layer of described the second building enclosure, install successively described displacement reflecting piece, as displacement measuring points, measure described working base point to the distance value l of each described displacement measuring points with described the first laser range sensor according to described survey frequency and the excavation number of plies with described displacement reflecting piece installation place
Ij, wherein i represents to excavate the number of plies; Each measured value l
IjWith first measured value l
I0Difference DELTA l
Ij=| l
Ij-l
I0| the described displacement measuring points that is projected as the i layer on horizontal line is to the relative level shift value δ of described working base point
Ij, δ
Ij=Δ l
IjSin θ
i, wherein
h
iThe degree of depth for excavation foundation ditch during to the i layer;
The displacement measuring points of described i layer is to the relative level shift value δ of described working base point
IjAbswolute level shift value Δ l with described benchmark measuring point
jDifference be the abswolute level displacement S of the displacement measuring points of described i layer
Ij, S
Ij=| δ
Ij-Δ l
j|.
Preferably, measuring method also comprises the relative level shift value δ that the described displacement measuring points of described i layer is arrived described working base point
IjModification method: make δ
Ij'=δ
Ij+ δ
I-1, k, wherein, δ
Ij' be modified value; I=2,3, K is that the first described displacement measuring points of described i layer of measuring is to the distance value l of described working base point
I0The time, to the measurement number of times of i-1 layer; δ
I-1, kArrive the distance value l of described working base point for the described displacement measuring points at the first i of measurement layer
I0The time, the described displacement measuring points of i-1 layer is with respect to the relative level shift value of described working base point.
As mentioned above, measurement mechanism and the measuring method of foundation pit enclosure structure layering horizontal shift of the present invention have following beneficial effect:
1. laser range sensor is installed on the measuring point of foundation pit enclosure structure by a dismountable alignment device, alignment device is simple in structure, convenient to install and measure at any time, avoid measurement mechanism to be damaged, all do not affect the foundation ditch normal construction when installing and measuring, the measurement mechanism of whole foundation pit enclosure structure layering horizontal shift is easy to apply;
2. measure according to the excavation of foundation pit Depth Stratification, and consider the horizontal shift value that last layer has occured when measuring this layer horizontal shift measuring point, measurement result is revised, make measurement result more accurate reliable;
3. consist of point between the ball-and-socket of alignment device and the bulb rotor and contact, effectively solved after the traditional measurement device is installed the larger error that causes when face between the stationary installation contacts with button owing to surveying instrument and face and contacted the problems such as the measurement result poor stability that causes and poor repeatability.
Description of drawings
Fig. 1 is shown as the schematic diagram of foundation pit enclosure structure layering horizontal shift measurement mechanism of the present invention and the schematic diagram of measuring method.
Fig. 2 is shown as the local enlarged diagram of the measurement mechanism of foundation pit enclosure structure layering horizontal shift of the present invention.
Fig. 3 is shown as the schematic diagram of revising the relative level shift value of each layer displacement measuring points in the measuring method of foundation pit enclosure structure layering horizontal shift of the present invention.
Embodiment
Below by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this instructions.The present invention can also be implemented or be used by other different embodiment, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications or change under the spirit of the present invention not deviating from.
See also accompanying drawing 1 to accompanying drawing 3.Need to prove, the diagram that provides in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy only show in graphic with the present invention in relevant assembly but not component count, shape and size drafting when implementing according to reality, kenel, quantity and the ratio of each assembly can be a kind of random change during its actual enforcement, and its assembly layout kenel also may be more complicated.
Figure 1 shows that the schematic diagram of measurement mechanism provided by the invention, this measurement mechanism is used for measuring foundation pit enclosure structure layering horizontal shift.As shown in Figure 1, foundation pit enclosure structure 4 comprises that the first building enclosure 41(Fig. 1 that is arranged in foundation ditch 1 both sides shows the building enclosure be arranged in the left side) and second building enclosure 42(Fig. 1 demonstration be positioned at the building enclosure on right side), the first building enclosure 41 and the second building enclosure 42 include collar tie beam 411 and enclosure wall 412.This measurement mechanism comprises a relative displacement measurement mechanism 21 and an absolute displacement measuring apparatus 22.
Relative displacement measurement mechanism 21 comprises the first alignment device 211, the first laser range sensor 212 and a plurality of displacement reflecting piece 213.The first alignment device 211 is fixedly mounted on the side of the first building enclosure 41, and the first laser range sensor 212 is installed on the first alignment device 211, and each displacement reflecting piece 213 is installed on the second building enclosure 42.
Absolute displacement measuring apparatus 22 comprises the second alignment device 221, the second laser range sensor 222 and a benchmark reflecting piece 223.The second alignment device 221 is fixedly mounted on the end face of the first building enclosure 41, and the second laser range sensor 222 is installed on the second alignment device 221, and benchmark reflecting piece 223 is fixedly installed on reference point 31 places of the first building enclosure 41 1 sides.Reference point 31 to second laser range sensors 222 apart from more than or equal to foundation ditch 1 cutting depth h 5 times of l, i.e. l 〉=5h.
Fig. 2 is shown as the local enlarged diagram of the measurement mechanism of foundation pit enclosure structure layering horizontal shift of the present invention, as shown in Figure 2, the first alignment device 211 and the second alignment device 221 include a pedestal 23, be provided with a ball-and-socket 231 in the pedestal 23, ball-and-socket 231 consists of sphere with a bulb rotor 232 and cooperates, bulb rotor 232 is fixedly connected with the second laser range sensor 222 with the first laser range sensor 212, is provided with locking device 24 between ball-and-socket 231 and the bulb rotor 232.In embodiment, locking device 24 is for being installed in the lock-screw 241 on the pedestal 23, and the head 2411 of lock-screw 241 exposes to pedestal 23, and the afterbody 2412 of lock-screw 241 stretches in the ball-and-socket 231.
Be fixed with screw 2321 on the bulb rotor 232, the first laser range sensor 212 and the second laser range sensor 222 are provided with the threaded hole 2121 that cooperates with screw 2321, by the first laser range sensor 212, the second laser range sensor 222 being linked together with bulb rotor 232 screw 2321 and cooperating of threaded hole 2121.The first alignment device 211 is fixedly mounted on by the first setscrew 214 on the side of the first building enclosure 41 collar tie beams 411, and the second alignment device 221 is fixedly mounted on the end face of the first building enclosure 41 collar tie beams 411 by the second setscrew 224.The end of the first setscrew 214 and the second setscrew 224 all has screw thread 25, and screw thread 25 length are fixed, and just in time the threaded hole 233 with pedestal 23 1 ends cooperates, and makes alignment device can both be fixedly secured to same position at every turn, has guaranteed higher alignment precision.
When measuring foundation pit enclosure structure layering horizontal shift, outside the foundation ditch of the first building enclosure 41 the same sides, determine on request what a fixed reference point 31, arrange benchmark reflecting piece 223 at these reference point 31 places, the second alignment device 221 that is connected with the second laser range sensor 222 is installed on the second setscrew 224, the Installation Elevation of the elevation of benchmark reflecting piece 223 and the second alignment device 221 is basically identical, consists of absolute displacement measuring apparatus 22.With the installation place of the second laser range sensor 222 as benchmark measuring point 32.
Relative with the first setscrew 214, a displacement measuring points 341 is determined in collar tie beam 411 sides in the second building enclosure 42, install a displacement reflecting piece 213, the first alignment device 211 that is connected with the first laser range sensor 212 is installed on the first setscrew 214, as working base point 33, consist of relative displacement measurement mechanism 21 with the installation place of the first laser range sensor 212.
The laser survey line that the reflective surface of displacement reflecting piece 213 or benchmark reflecting piece 223 is all tried one's best and launched perpendicular to the first laser range sensor 212 or the second laser range sensor 222.Can adjust arbitrarily the angle of the first laser range sensor 212 or the second laser range sensor 222 Laser emission by roating sphere head rotor 232, realize the accurate alignment of survey line between measuring point.After laser emission point being sighted the central authorities of displacement reflecting piece 213 or benchmark reflecting piece 223, the head 2411 of rotational lock screw 241, make the afterbody 2412 of lock-screw 241 be deep into ball-and-socket 231 inside and hold out against bulb rotor 232, thereby lock the first laser range sensor 212 or the second laser range sensor 222, the fixed laser emission angle.Contact owing to consisting of point between ball-and-socket 231 and the bulb rotor 232, effectively solved the conventional laser distance measuring sensor the rear problems such as the measurement result poor stability that causes and poor repeatability that contact with face between the stationary installation owing to surveying instrument are installed.
All be connected with external triggering line and external trigger button on the first laser range sensor 212 and the second laser range sensor 222, can eliminate the measuring error that the flip flop equipment of direct contact type causes when button.When laser spots is sighted benchmark reflecting piece 223 or displacement reflecting piece 213 central, press external trigger button record reading.The first laser range sensor 212 and 222 pairs of measurement results of the second laser range sensor have numbering memory function and clock timing function, and enough internal memories are arranged, and data-interface can be with the data importing computer, and data resolution is 0.1mm.
The present invention also provides and has adopted above-mentioned measurement mechanism to carry out the measuring method that foundation pit enclosure structure layering horizontal shift is measured.Fig. 1 is shown as the schematic diagram of this measuring method.
Arrive the distance value l of reference point 31 according to survey frequency measuring basis measuring point 32 with the second laser range sensor 222
j, according to survey frequency, each measured value l
jWith first measured value l
0Difference be the abswolute level shift value Δ l of benchmark measuring point 32
j, Δ l
j=| l
j-l
0|, wherein j represents to measure number of times, j=0,1,2 ...Among the embodiment, survey frequency is for once a day.
Excavation along with foundation ditch 1 each layer, on the second building enclosure 42 corresponding each layers, install successively displacement reflecting piece 213, as displacement measuring points 34, arrive the distance value l of each displacement measuring points 34 with displacement reflecting piece 213 installation places according to survey frequency and excavation number of plies difference surveying work basic point 33 with the first laser range sensor 212
Ij, wherein, i represents to excavate the number of plies.The measured value l that at every turn obtains
IjWith first measured value l
I0Difference DELTA l
Ij=| l
Ij-l
I0| displacement measuring points 34 was to the relative level shift value δ of working base point 33 when being projected as on horizontal line excavated to the i layer
Ij
During the ground floor 11 of excavation pit 1, displacement measuring points 341 is arranged on collar tie beam 411 inboards of the second building enclosure 42, relative with the first setscrew 214 of the first building enclosure 41 collar tie beams 411 sides, adjustment is connected to the bulb rotor 232 on the first laser range sensor 212, make laser emission point sight displacement reflecting piece 213, record displacement measuring points 341 to the distance value of working base point 33.Collar tie beam can be thought the rigid body that do not deform, and therefore each measured value is a definite value l
1
Excavation is to the second layer 12, the 3rd layer 13 successively ... the time, lay displacement reflecting piece 213 in the enclosure wall 412 inboard relevant positions of the second building enclosure 42, consist of displacement measuring points 342,343 ...As shown in Figure 1,
h
iThe degree of depth for excavation foundation ditch 1 during to the i layer.Because the θ of i layer during each the measurement
iVariable quantity is very little, can think δ
Ij=Δ l
IjSin θ
i
Each displacement measuring points 34 is to the relative level shift value δ of working base point 33
IjAbswolute level shift value Δ l with benchmark measuring point 32
jDifference be the abswolute level displacement S of the displacement measuring points 34 of i layer
Ij, S
Ij=| δ
Ij-Δ l
j|.
For example, excavation to the 3rd layer 13 o'clock, each the 3rd layer of 13 displacement measuring points of measuring 343 is to the relative level shift value δ of working base point 33
3j=Δ l
3jSin θ
3,
Δ l
3j=| l
3j-l
30|.The abswolute level displacement S of the 3rd layer of 13 displacement measuring points 343
3j=| δ
3j-Δ l
j|.
The first laser range sensor 212 and the second laser range sensor 222 are identical laser range sensors, therefore in an embodiment, the first laser range sensor 212 and the second laser range sensor 222 can exchange, and are measuring the distance value l of benchmark measuring point 32 to reference point 31 with the second laser range sensor 222
jAfter, the second laser range sensor 222 is pulled down from the second alignment device 221, be installed to again on the first alignment device 211, be used for surveying work basic point 33 to the distance value l of each displacement measuring points 34
IjOnly use a laser range sensor also can finish measurement in the whole measuring process.
As shown in figures 1 and 3, more than be relative level displacement and the abswolute level displacement that records after displacement reflecting piece 213 layings of each displacement measuring points 34, because the stage excavation of foundation ditch 1 soil body, certain horizontal shift has just occured in foundation pit enclosure structure 4 before displacement measuring points 34 is laid, therefore, can begin the relative level shift value that records is revised from the second layer 12 with following methods:
Make δ
Ij'=δ
Ij+ δ
I-1, k, wherein, i=2,3, K is that the displacement measuring points 34 of the first i of measurement layer is to the distance value l of working base point 33
I0The time, to the number of times of i-1 layer measurement; δ
Ij' be modified value; δ
I-1, kFor arrive the distance value l of working base point 33 at the displacement measuring points 34 of the first i of measurement layer
I0The time, the displacement measuring points 34 of i-1 layer is with respect to the relative level shift value of working base point 33.
For example, excavation is to the 3rd layer 13, and when safeguarding that wall is laid the 3rd layer of 13 displacement measuring points 343, horizontal shift has occured enclosure wall 412, arrives the distance value l of working base point 33 at the first displacement measuring points 343 of measuring the 3rd layer 13
30The time, the displacement measuring points 342 of the second layer 12 has been carried out 5 times measured, obtain the displacement measuring points 342 of the second layer 12 with respect to the horizontal shift value δ of working base point 33
25, so modified value δ
3j'=δ
3j+ δ
25
In sum, the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not is used for restriction the present invention.Any person skilled in the art scholar all can be under spirit of the present invention and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under disclosed spirit and the technological thought, must be contained by claim of the present invention.
Claims (9)
1. the measurement mechanism of a foundation pit enclosure structure layering horizontal shift, described foundation pit enclosure structure (4) comprises the first building enclosure (41) and the second building enclosure (42) that is positioned at foundation ditch (1) both sides, described first, the second building enclosure (41,42) include collar tie beam (411) and enclosure wall (412), it is characterized in that: described measurement mechanism comprises a relative displacement measurement mechanism (21) and an absolute displacement measuring apparatus (22), and described relative displacement measurement mechanism (21) comprises the first alignment device (211) that is fixedly mounted on the first building enclosure (41) side, be installed in the first laser range sensor (212) on described the first alignment device (211) and be installed in displacement reflecting piece (213) on the second building enclosure (42); Described absolute displacement measuring apparatus (22) comprises the second alignment device (221) that is fixedly mounted on the first building enclosure (41) end face, be installed in the second laser range sensor (222) and a benchmark reflecting piece (223) on the second alignment device (221), benchmark reflecting piece (223) is fixedly installed on the reference point (31) of described the first building enclosure (41) one sides and locates, described first, the second alignment device (211,221) include a pedestal (23), be provided with a ball-and-socket (231) in the pedestal (23), ball-and-socket (231) cooperates with bulb rotor (a 232) sphere, bulb rotor (232) and described first, the second laser range sensor (212,222) be fixedly connected with, also be provided with locking device (24) between described ball-and-socket (231) and the described bulb rotor (232).
2. the measurement mechanism of foundation pit enclosure structure layering horizontal shift according to claim 1, it is characterized in that: be fixed with screw (2321) on the bulb rotor (232), be connected by described screw (2321) between described first, second laser range sensor (212,222) and the described bulb rotor (232).
3. the measurement mechanism of foundation pit enclosure structure layering horizontal shift according to claim 1, it is characterized in that: described locking device (24) is for being installed in the lock-screw (241) on the described pedestal (23), the head (2411) of described lock-screw (241) exposes to described pedestal (23), and the afterbody of described lock-screw (2412) stretches in the described ball-and-socket (231).
4. the measurement mechanism of foundation pit enclosure structure layering horizontal shift according to claim 1 is characterized in that: described the first alignment device (211) is fixedly mounted on by the first setscrew (214) on the side of collar tie beam (411) of described the first building enclosure (41); Described the second alignment device (221) is fixedly mounted on by the second setscrew (224) on the end face of collar tie beam (411) of described the first building enclosure (41).
5. the measurement mechanism of foundation pit enclosure structure layering horizontal shift according to claim 4, it is characterized in that: the end of described first, second setscrew (214,224) all has screw thread (25), and described screw thread (25) has regular length.
6. the measurement mechanism of foundation pit enclosure structure layering horizontal shift according to claim 1, it is characterized in that: described first, second laser range sensor all is connected with external triggering line and external trigger button on (212,222).
7. the measurement mechanism of foundation pit enclosure structure layering horizontal shift according to claim 1 is characterized in that: described reference point (31) is to more than or equal to described foundation ditch (1) cutting depth 5 times of the distance of described the second laser range sensor (222).
8. one kind is adopted the measurement mechanism described in the claim 1 to carry out the method that foundation pit enclosure structure layering horizontal shift is measured, and it is characterized in that may further comprise the steps:
Selected reference point (31), with described the second laser range sensor (222) installation place as benchmark measuring point (32), measure described reference point (31) to the distance value l of described benchmark measuring point (32) with the second laser range sensor (222) according to survey frequency, according to survey frequency, each measured value l
jWith first measured value l
0Difference be the abswolute level shift value Δ l of described benchmark measuring point (32)
j, Δ l
j=| l
j-l
0|, wherein j represents to measure number of times, j=0,1,2
With the installation place of described the first laser range sensor (212) as working base point (33), excavation along with each layer of described foundation ditch (1), install successively described displacement reflecting piece (213) on each layer accordingly in described the second building enclosure (42), as displacement measuring points (34), measure described working base point (33) to the distance value l of each described displacement measuring points (34) with described the first laser range sensor (212) according to described survey frequency and the excavation number of plies with described displacement reflecting piece (213) installation place
Ij, wherein i represents to excavate the number of plies; Each measured value l
IjWith first measured value l
I0Difference DELTA l
Ij=| l
Ij-l
I0| the described displacement measuring points (34) that is projected as the i layer on horizontal line is to the relative level shift value δ of described working base point (33)
Ij, δ
Ij=Δ l
IjSin θ
i, wherein
h
iThe degree of depth for excavation foundation ditch during to the i layer;
The displacement measuring points of described i layer (34) is to the relative level shift value δ of described working base point (33)
IjAbswolute level shift value Δ l with described benchmark measuring point (32)
jDifference be the abswolute level displacement S of the displacement measuring points (34) of described i layer
Ij, S
Ij=| δ
Ij-Δ l
j|.
9. the method for foundation pit enclosure structure layering horizontal shift measurement according to claim 8 is characterized in that, also comprises the relative level shift value δ that the described displacement measuring points (34) of described i layer is arrived described working base point (33)
IjModification method:
Make δ
Ij'=δ
Ij+ δ
I-1, k, wherein, δ
Ij' be modified value; I=2,3, K is that the first described displacement measuring points (34) of described i layer of measuring is to the distance value l of described working base point (33)
I0The time, to the measurement number of times of i-1 layer; δ
I-1, kArrive the distance value l of described working base point (33) for the described displacement measuring points (34) at the first i of measurement layer
I0The time, the described displacement measuring points (34) of i-1 layer is with respect to the relative level shift value of described working base point (33).
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| CN104631419A (en) * | 2015-01-16 | 2015-05-20 | 绍兴文理学院 | Foundation pit top horizontal displacement monitoring method |
| CN104988928A (en) * | 2015-05-25 | 2015-10-21 | 浙江省围海建设集团股份有限公司 | Method for monitoring foundation pit excavation horizontal displacement in real-time manner based on digital images |
| CN105586994A (en) * | 2016-01-04 | 2016-05-18 | 大连大学 | Monitoring device and monitoring method for horizontal displacement of pile tip of retaining pile for foundation pit |
| CN106500661A (en) * | 2016-11-21 | 2017-03-15 | 中国地质大学（武汉） | The device that side slope deviational survey is carried out using prospect pit obtains each mark point absolute coordinate method |
| CN106500661B (en) * | 2016-11-21 | 2022-12-06 | 中国地质大学（武汉） | Method for obtaining absolute coordinates of each marking point by using slope surveying device of exploratory well |
| CN106767490A (en) * | 2017-03-22 | 2017-05-31 | 上海公路桥梁（集团）有限公司 | A kind of displacement measuring device and its method for axial force of the supports servo-drive system |
| CN109269434A (en) * | 2018-10-23 | 2019-01-25 | 四川大学 | A kind of straight mounted palisades deformation laser scanning system and its application method |
| CN110030939A (en) * | 2019-04-04 | 2019-07-19 | 中铁十四局集团有限公司 | A kind of country rock linear displacement measuring device and method |
| CN110030939B (en) * | 2019-04-04 | 2021-08-10 | 中铁十四局集团有限公司 | Device and method for measuring linear displacement of surrounding rock |
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