CN216379681U - Monitoring device of foundation pit construction supporting system - Google Patents
Monitoring device of foundation pit construction supporting system Download PDFInfo
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- CN216379681U CN216379681U CN202122765378.9U CN202122765378U CN216379681U CN 216379681 U CN216379681 U CN 216379681U CN 202122765378 U CN202122765378 U CN 202122765378U CN 216379681 U CN216379681 U CN 216379681U
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Abstract
The utility model relates to a monitoring device of a foundation pit construction supporting system, which comprises a foundation pit, wherein a fender post is arranged around the foundation pit, monitoring points are arranged in the middle of the periphery of the fender post and at an external corner, a prism connecting rod is arranged at each monitoring point, the prism connecting rod is provided with a prism mounting position and a connecting rod, the top of each connecting rod is used as a settlement monitoring point, the prism mounting position is used as a horizontal displacement monitoring point after a prism is mounted, and the bottom of the prism connecting rod is welded on a steel sheet pile; the displacement monitoring points at the top of the fender post are arranged on the periphery of the fender post, so that the horizontal displacement and settlement displacement monitoring points are shared; and observing the horizontal displacement by adopting a polar coordinate method according to the field condition. Arranging a total station on the selected horizontal displacement monitoring control points, accurately leveling and centering, looking back at other horizontal displacement monitoring control points, measuring the angle and distance between the monitoring points and the monitoring reference points, and calculating the coordinates of each monitoring point; and measuring the settlement displacement by using a total station by adopting a triangulation height measurement method.
Description
Technical Field
The utility model relates to the technical field of foundation pit construction, in particular to a monitoring device for a foundation pit construction supporting system.
Background
At present, the foundation pit construction monitoring covers all stages of underground engineering construction, and the initial value is measured from 1 week before the foundation pit excavation construction until the backfill soil is finished and the data is converged. And strictly monitoring and providing various data in time in the excavation process of the foundation pit.
In order to avoid the damage of the engineering construction to the surrounding environment and the engineering itself, an advanced and reliable instrument and an effective monitoring method are needed to monitor the deformation and stress strain conditions of the engineering itself and the surrounding environment and provide required data for the dynamic design and the information construction of the engineering, so that the engineering is in a controlled state and the safety of the engineering itself and the surrounding environment is ensured.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model aims to provide a monitoring device for a foundation pit construction supporting system.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a monitoring devices of system is strutted in foundation ditch construction, includes the foundation ditch, be equipped with fender pile around the foundation ditch, fender pile peripheral middle part and external corner department are equipped with the monitoring point, and the monitoring point is equipped with the prism connecting rod, and the prism connecting rod is equipped with prism installation position and connecting rod, and the top of connecting rod is as subsiding the monitoring point, and the prism installation position is as the horizontal displacement monitoring point after installing the prism, and the bottom welding of prism connecting rod is on the steel sheet pile.
Preferably, the monitoring device is provided with a plurality of first reference points, and the first reference points surround a triangle to monitor the sedimentation displacement.
Preferably, the monitoring device is provided with a second reference point and a rear view point, the second reference point and the monitoring point are located at the same horizontal position, and the rear view point is installed at a position forming an acute angle with the second reference point to monitor horizontal displacement.
Preferably, the first reference point is provided with a total station.
Preferably, the second reference point is also provided with a total station, and the rear viewpoint is provided with a prism.
Preferably, the connecting part of the prism mounting position and the connecting rod is provided with symmetrical branches, the top of each branch is a straight rod, and the bottom of each branch is provided with a rod with a cambered surface.
The utility model has the following beneficial effects: the displacement monitoring points at the top of the fender post are arranged on the periphery of the fender post, so that the horizontal displacement and settlement displacement monitoring points are shared; and observing the horizontal displacement by adopting a polar coordinate method according to the field condition. Arranging a total station on the selected horizontal displacement monitoring control point, accurately leveling and centering, looking back at other horizontal displacement monitoring control points, measuring the angle and distance between the monitoring point and the monitoring reference point, calculating the coordinates of each monitoring point, projecting the displacement vector to the direction vertical to the foundation pit, and calculating the deformation of the monitoring point to the inner side of the foundation pit according to the comparison between each period and the initial value; measuring the settlement displacement by a total station by adopting a triangular elevation measurement method; and establishing a leveling monitoring network by adopting a relative height system.
Drawings
Fig. 1 is a schematic structural diagram of settlement displacement monitoring according to the present invention.
Fig. 2 is a schematic structural diagram of the horizontal displacement monitoring of the present invention.
FIG. 3 is a schematic structural view of a prism connecting bar of the present invention.
In the figure: 1, foundation pit; 2-fender posts; 3-prism connecting rod, 301-prism mounting position, 302-connecting rod, 303-prism; 4-a first datum point; 5-a second datum point; 6-rear viewpoint; 7-monitoring points; 8-branch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the utility model is shown in figures 1-3, and the monitoring device for a foundation pit construction supporting system comprises a foundation pit 1, a fender post 2 is arranged around the foundation pit 1, monitoring points 7 are arranged in the middle of the periphery of the fender post 2 and at the external corner of the fender post, a prism connecting rod 3 is arranged at the monitoring points 7, a prism mounting position 301 and a connecting rod 302 are arranged on the prism connecting rod 3, the top of the connecting rod 302 is used as a settlement monitoring point, the prism mounting position 301 is used as a horizontal displacement monitoring point after a prism 303 is mounted, and the bottom of the prism connecting rod 3 is welded on a steel sheet pile.
The monitoring device is provided with a plurality of first datum points 4, the first datum points 4 enclose a triangle to monitor settlement displacement, and the first datum points 4 are provided with a total station.
The monitoring device is provided with a second datum point 5 and a rear view point 6, the second datum point 5 and the monitoring point 7 are located at the same horizontal position, the rear view point 6 is installed at a position forming an acute angle with the second datum point 5 and used for monitoring horizontal displacement, the second datum point 5 is also provided with a total station, and the rear view point 6 is provided with a prism.
The junction of prism installation position 301 and connecting rod 302 is equipped with branch 8 of mutual symmetry, and the top of branch 8 is the straight-bar, and the bottom of branch 8 is equipped with the pole that has the cambered surface.
And (3) settlement displacement calculation: and measuring the settlement by using a total station by adopting a triangulation height measurement method. And a relative height system is adopted, a leveling monitoring network is established, and the leveling is guided and measured by a level gauge according to leveling specification requirements such as II and the like. The previous settlement deformation monitoring is to measure a closed or attached level line through the joint measurement between elevation datum points, and measure the elevation of each monitoring point through a working base point of the line. The initial elevation value of each monitoring point is measured before construction.
And (3) horizontal displacement calculation: and measuring by adopting a polar coordinate method under a local coordinate system according to the actual situation of the site. When in observation, a total station is erected on the second datum point 5, a prism connecting rod 3 is erected on the rear viewpoint 6 and the monitoring point 7, the included angle beta between the rear viewpoint 6 and the second datum point 5 is measured by utilizing the angle measuring function of the total station, and the side length S is measured by utilizing the side measuring function of the total stationAP，SAPIs the distance between the monitoring point 7 and the second reference point 5. The coordinate (X) of the monitoring point P can be calculated according to the following formulaP，YP)。
xP＝xA+SAP·cosαAP，
yP＝yA+SAP·sinαAP，
In the formula: a is a second reference point, B is a rear viewpoint, P is a monitoring point,
αAPin coordinate azimuth, in units (°);
beta is the included angle between the rear view point and the monitoring point, and is unit (DEG);
SAPdistance from the total station to the back viewpoint in units (mm);
XP，YPthe horizontal and vertical coordinates of the monitoring point are in unit (mm).
A local coordinate system is assumed, the axial direction of the foundation pit is taken as an X axis, and the vertical direction of the foundation pit is taken as a Y axis. Measuring the initial coordinates (x) of each monitoring point before construction0,y0) The coordinate is measured to be (X) in the construction processP，YP). According to different positions of the monitoring points, the horizontal displacement of the monitoring points in the direction perpendicular to the foundation pit can be obtained, and data such as deformation, stage deformation rate and accumulated deformation of each stage are calculated according to displacement values of the monitoring points in each stage.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (6)
1. The utility model provides a monitoring devices of system is strutted in foundation ditch construction, a serial communication port, includes the foundation ditch, be equipped with fender pile around the foundation ditch, fender pile peripheral middle part and external corner department are equipped with the monitoring point, and the monitoring point is equipped with the prism connecting rod, and the prism connecting rod is equipped with prism installation position and connecting rod, and the top of connecting rod is as subsiding the monitoring point, and the prism installation position is as horizontal displacement monitoring point after installing the prism, and the bottom welding of prism connecting rod is on the steel sheet pile.
2. A device as claimed in claim 1, wherein the device is provided with first datum points, the first datum points defining a triangle for monitoring settlement displacement.
3. The apparatus as claimed in claim 1, wherein the apparatus is provided with a second reference point and a rear view point, the second reference point and the monitoring point are located at the same horizontal position, and the rear view point is installed at a position forming an acute angle with the second reference point to monitor the horizontal displacement.
4. A monitoring device for an excavation supporting system as claimed in claim 2, wherein the first datum point is provided by a total station.
5. A device as claimed in claim 3, wherein the second datum point is also provided with a total station and the rear viewpoint is provided with a prism.
6. The monitoring device of a foundation pit construction supporting system according to claim 1, wherein the junction of the prism mounting position and the connecting rod is provided with symmetrical branches, the top of each branch is a straight rod, and the bottom of each branch is provided with a rod with a cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122765378.9U CN216379681U (en) | 2021-11-12 | 2021-11-12 | Monitoring device of foundation pit construction supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122765378.9U CN216379681U (en) | 2021-11-12 | 2021-11-12 | Monitoring device of foundation pit construction supporting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216379681U true CN216379681U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122765378.9U Active CN216379681U (en) | 2021-11-12 | 2021-11-12 | Monitoring device of foundation pit construction supporting system |
Country Status (1)
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| CN (1) | CN216379681U (en) |
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2021
- 2021-11-12 CN CN202122765378.9U patent/CN216379681U/en active Active
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