CN221052702U - Existing ultra-deep foundation pit safety monitoring system - Google Patents
Existing ultra-deep foundation pit safety monitoring system Download PDFInfo
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- CN221052702U CN221052702U CN202323077870.2U CN202323077870U CN221052702U CN 221052702 U CN221052702 U CN 221052702U CN 202323077870 U CN202323077870 U CN 202323077870U CN 221052702 U CN221052702 U CN 221052702U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 95
- 238000006073 displacement reaction Methods 0.000 claims abstract description 34
- 239000003673 groundwater Substances 0.000 claims abstract description 13
- 238000004062 sedimentation Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 230000003068 static effect Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 14
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The application relates to an existing ultra-deep foundation pit safety monitoring system which comprises a controller, a sedimentation monitoring system, a prestress monitoring system, a horizontal displacement monitoring system and a ground water level monitoring system, wherein the sedimentation monitoring system, the prestress monitoring system, the horizontal displacement monitoring system and the ground water level monitoring system are connected with the controller, an alarm module is connected to the controller, the sedimentation monitoring system, the prestress monitoring system, the horizontal displacement monitoring system and the ground water level monitoring system send feedback signals to the controller, the controller receives and processes the feedback signals, and sends control signals to the alarm module, and the alarm module sends alarm signals. The foundation pit safety monitoring system can timely find unstable factors in foundation pit construction, is favorable for timely grasping the running condition and the safety condition of engineering, and can timely remedy the engineering, so that the occurrence of construction accidents is reduced.
Description
Technical Field
The application relates to the field of deep foundation pit monitoring technology, in particular to an existing ultra-deep foundation pit safety monitoring system.
Background
In foundation pit engineering, due to engineering geological conditions, hydrogeological conditions, external load conditions, supporting structure material properties, stress states and mechanical mechanisms of underground structures, construction conditions and complexity of external factors, problems possibly encountered in engineering are difficult to predict in theory only, and the theoretical prediction value cannot reflect various changes of the engineering comprehensively and accurately. Therefore, planned on-site monitoring under theoretical analysis guidance is necessary.
The monitoring is a quantitative method and effective means for interpreting and expressing the construction quality and the safety of the engineering by using relative precise numerical values, is dynamic interpretation of the engineering design experience safety coefficient, and is a necessary condition for ensuring the engineering to be successfully completed. Under the careful plan, the monitoring can be carried out at proper positions and by using advanced instruments, and good effects can be obtained, particularly, the method plays an important role in the aspect of realizing informatization construction by timely adjusting various construction parameters according to monitoring data by engineers so as to enable the construction to be in an optimal state.
In the foundation pit construction, because the characteristics of heavy engineering task, multiple engineering difficulties, high environmental risk, long engineering battlefield, large organization difficulty and the like bring a plurality of uncertain factors to the engineering construction, a strict, scientific and reasonable monitoring and control system is required to be established by advanced and reliable means, so that the safety and stability of the foundation pit engineering and the surrounding environment thereof during the construction period are ensured.
Disclosure of utility model
The application aims to provide an existing ultra-deep foundation pit safety monitoring system, which can timely find unstable factors in foundation pit construction, is beneficial to timely grasping the running condition and the safety condition of engineering, and can timely remedy the running condition and the safety condition, and reduce the occurrence of construction accidents.
The application provides an existing ultra-deep foundation pit safety monitoring system, which adopts the following technical scheme:
The existing ultra-deep foundation pit safety monitoring system comprises a controller, and a settlement monitoring system, a prestress monitoring system, a horizontal displacement monitoring system and a ground water level monitoring system which are connected with the controller, wherein an alarm module is connected to the controller, the settlement monitoring system, the prestress monitoring system, the horizontal displacement monitoring system and the ground water level monitoring system send feedback signals to the controller, the controller receives and processes the feedback signals, and sends control signals to the alarm module, and the alarm module sends alarm signals.
As a preferable technical scheme of the application, the settlement monitoring system comprises a liquid storage tank and a plurality of static level gauges arranged at the same level, wherein the lower end of the liquid storage tank is provided with a liquid through pipe, the liquid through pipe connects the static level gauges in series, the upper end of the liquid storage tank is provided with a vent pipe, the vent pipe connects the static level gauges in series, and the liquid storage tank is arranged on a supporting frame and is higher than the static level gauges in height.
As a preferable technical scheme of the application, the prestress monitoring system comprises an anchor cable axial force meter and a steel support axial force meter which are connected with a controller, wherein the anchor cable axial force meter is arranged on an anchor cable protruding out of a foundation pit wall, and the steel support axial force meter is arranged on a steel support of the foundation pit wall.
As a preferable technical scheme of the application, the horizontal displacement monitoring system comprises a plurality of two-dimensional area array laser displacement meters which are arranged in a straight line along the top wall of the foundation pit and an adjustable bracket for mounting the two-dimensional area array laser displacement meters, wherein the adjustable bracket is mounted on the top wall of the foundation pit and has adjustable height.
As a preferable technical scheme of the application, the adjustable bracket comprises a mounting base, a fixed threaded sleeve fixed on the upper surface of the mounting base, a height adjusting ring in threaded connection with the fixed threaded sleeve, a tightening spring sleeved in the fixed threaded sleeve, a mounting plate connected to the upper end of the tightening spring and a connecting hanging rod connected between the mounting plate and the height adjusting ring, wherein at least two open slots formed from top to bottom are formed in the side wall of the fixed threaded sleeve, the connecting hanging rod is arranged in the open slots in a penetrating manner, and the lower end of the connecting hanging rod is outwards bent and abutted to the lower surface of the height adjusting ring.
As a preferable technical scheme of the application, the underground water level monitoring system comprises a plurality of pore water pressure meters with the same distance from the side wall of the foundation pit, and the pore water pressure meters are connected with a controller.
As a preferable technical scheme of the application, the alarm module comprises a field alarm electrically connected with the controller and an information receiving terminal connected with the controller through a communication module, and the communication module sends alarm signals to the information receiving terminal through digital information.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the safety monitoring system can monitor the settlement condition around the foundation pit, the prestress condition of the foundation pit supporting structure, the horizontal displacement condition of the side wall of the foundation pit and the groundwater penetration condition around the foundation pit simultaneously, so that the foundation pit construction can be monitored more comprehensively, unstable factors in the foundation pit construction can be found in time, and the running condition and the safety condition of engineering can be mastered in time.
2. The application uses the adjustable bracket to support and adjust the height of the two-dimensional area array laser displacement meter, so that the two-dimensional area array laser displacement meter can be stabilized on the top wall of the foundation pit, and the influence on the monitoring result caused by the displacement of the two-dimensional area array laser displacement meter due to artificial collision or equipment vibration is avoided.
3. The adjustable bracket is convenient for the installation and the height adjustment of the two-dimensional area array laser displacement meter, and has simple structure, safety and reliability.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a safety monitoring system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a sedimentation monitoring system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of the arrangement of a horizontal displacement monitoring system according to an embodiment of the present application;
FIG. 4 is a schematic view of the structure of an adjustable bracket according to an embodiment of the present application;
In the figure, 1, a controller; 2. a sedimentation monitoring system; 21. a liquid storage tank; 22. a static level; 23. a liquid pipe; 24. a vent pipe; 25. a support frame; 3. a prestress monitoring system; 4. a horizontal displacement monitoring system; 41. a two-dimensional area array laser displacement meter; 42. an adjustable bracket; 43. a mounting base; 44. fixing the threaded sleeve; 45. a height adjusting ring; 46. a spring is tightly propped; 47. a mounting plate; 48. connecting a hanging rod; 49. a groove is formed; 5. a groundwater level monitoring system; 6. a field alarm; 7. a communication module; 8. an information receiving terminal.
Detailed Description
The present application will be described in further detail with reference to fig. 1 to 4.
Examples: the embodiment provides an existing ultra-deep foundation pit safety monitoring system, referring to fig. 1, the safety monitoring system comprises a controller 1, a settlement monitoring system 2, a prestress monitoring system 3, a horizontal displacement monitoring system 4, a ground water level monitoring system 5 and an alarm module, wherein the controller 1 is arranged on an engineering site, the settlement monitoring system 2, the prestress monitoring system 3, the horizontal displacement monitoring system 4, the ground water level monitoring system 5 and the alarm module are all connected with the controller 1, the connection mode can be line connection or wireless communication connection, the settlement monitoring system 2, the prestress monitoring system 3, the horizontal displacement monitoring system 4 and the ground water level monitoring system 5 can monitor the engineering environment on site in real time and transmit monitored information as feedback signals to the controller 1, the controller 1 adopts a PLC (programmable logic controller) for receiving and processing the feedback signals, judging whether the information fed back by the four systems is abnormal, if abnormal, the information fed back by the four systems is sent to the alarm module, and the alarm module sends an alarm signal.
The alarm module comprises a field alarm 6, a communication module 7 and an information receiving terminal, wherein the field alarm 6 can adopt an audible and visual alarm and is electrically connected with the controller 1, and a group of field alarms 6 are correspondingly arranged on each of the four systems of the sedimentation monitoring system 2, the prestress monitoring system 3, the horizontal displacement monitoring system 4 and the underground water level monitoring system 5, so that the position of a foundation pit with a problem can be more intuitively reflected. The communication module 7 may be provided with the controller 1, the information receiving terminal 8 is provided as a mobile phone or a computer, and is connected with the controller 1 through wireless communication, and the communication module 7 converts the alarm signal into digital information and then transmits the digital information to the information receiving terminal 8.
Referring to fig. 2, the settlement monitoring system 2 comprises a liquid storage tank 21, a static level gauge 22, a liquid passing pipe 23, a vent pipe 24 and a supporting frame 25, wherein the settlement monitoring system 2 is arranged at the bottom of a foundation pit or at the top of the side wall of the foundation pit, the supporting frame 25 is placed on a test plane, the liquid storage tank 21 is arranged into a cylindrical structure, the upper end and the lower end of the liquid storage tank are sealed, the static level gauge 22 is axially and vertically arranged on the supporting frame 25, a plurality of static level gauges 22 are arranged, all the static level gauges 22 are arranged on the same horizontal height, the liquid storage tank 21 is higher than the static level gauge 22, antifreeze is arranged in the liquid storage tank 21, the volume of the antifreeze accounts for one half to two thirds of the volume of the liquid storage tank, the rest is air, the liquid passing pipe 23 is connected at the lower end of the liquid storage tank 21, the liquid passing pipe 23 connects all the static level gauges 22 in series, the vent pipe 24 is connected at the upper end of the liquid storage tank 21, and the vent pipe 24 connects all the static level gauges 22 in series.
In this embodiment, the differential pressure sedimentation monitoring system 2 is formed by connecting a plurality of static leveling instruments 22 together through a PU liquid-passing pipe 23 filled with liquid, and finally the liquid-passing pipe 23 is connected to a liquid storage tank 21, so that compared with the capacity of the liquid-passing pipe 23, the liquid storage tank 21 has a large enough capacity, and the influence of the pipeline capacity caused by temperature change can be effectively reduced. According to the principle of communicating pipes, after the system is built, the measuring points of all the static leveling instruments 22 are basically at the same elevation, after one end (tail end) of the liquid through pipe 23 is sealed, the liquid in the whole liquid through pipe is not flowing, when the measuring points deform (subside or rise) along with the structure, the relative height difference of the measuring points relative to the liquid level in the base point liquid storage tank 21 changes, the measuring point measuring value correspondingly changes, and the changing quantity is the relative subsidence quantity of the measuring points.
The prestress monitoring system 3 comprises a prestress anchor cable monitoring system and a prestress steel support monitoring system. The prestress anchor cable monitoring system adopts an anchor cable axial force meter which is arranged on an anchor cable protruding out of the wall of the foundation pit and is connected with the controller 1. The anchor cable axial force meter is characterized in that a vibrating wire sensor with high stability and high sensitivity is arranged on a hollow pressure-bearing cylinder body, then the strain change on the pressure-bearing cylinder body is measured to push out the load born on the pressure-bearing cylinder body, when the measured load acts on the axial force meter, the deformation of an elastic cylinder is caused and transmitted to a steel wire, and the change of the stress is converted Cheng Zhenxian, so that the vibration frequency of the vibrating wire is changed. The electromagnetic coil excites the steel wire and measures the vibration frequency, the frequency signal is transmitted to the vibrating wire reader through the cable, and the reading frequency value can be measured, so that the load value acting on the anchor cable axial force meter is calculated.
The prestress steel support monitoring system adopts a steel support axial force meter which is arranged on a steel support of the foundation pit wall and is also connected with the controller 1. The steel support axial force meter adopts FS-ZL series vibrating wire counter force meter, which mainly comprises a steel bracket, a steel wire, a wire clamping device and a coil, wherein the pressure-bearing bottom surface is connected with the steel wire, and the steel wire is pre-tensioned and fixed in the sensor. According to the classical string principle, the natural frequency of a steel string is fixed under certain chord length and stress. When the chord length is fixed, the square of the natural frequency of the steel chord is in direct proportion to the tension of the chord. When the supporting stress acts on the bearing surface of the axial force meter, the bearing surface is slightly deformed, so that the tension of the steel wire connected with the bearing bottom surface is changed, and the natural frequency of the steel wire is also changed. The square of the natural frequency of the steel string is inversely related to the pressure on the pressure bearing surface, and the measured stress can be obtained by measuring the change of the frequency of the steel string.
Referring to fig. 3, the horizontal displacement monitoring system 4 includes a plurality of two-dimensional area array laser displacement meters 41 arranged in a straight line along the top wall of the foundation pit and an adjustable bracket 42 for mounting the two-dimensional area array laser displacement meters 41, wherein the adjustable bracket 42 is mounted on the top wall of the foundation pit and has adjustable height for adjusting the height of the two-dimensional area array laser displacement meters 41 so that the plurality of two-dimensional area array laser displacement meters 41 are positioned in the same straight line.
The laser transmitter of the two-dimensional area array laser displacement meter 41 emits visible red laser to the surface of the measured object through a lens, and the laser reflected by the object is received by an internal CCD linear camera through a receiver lens, and the CCD linear camera can 'see' the light spot under different angles according to different distances. Based on this angle and the known distance between the laser and the camera, the digital signal processor can calculate the distance between the sensor and the object under test.
Referring to fig. 4, the adjustable bracket 42 includes a mounting base 43, a fixed threaded sleeve 44, a height adjustment ring 45, a jack spring 46, a mounting plate 47, and a connecting rod 48. The installation base 43 is a rectangular plate, and an anchor rod is fixed on the lower surface, so that the installation base 43 can be fixed in a soil layer. The fixed threaded sleeve 44 is vertically fixed on the upper surface of the mounting base 43, an external thread is arranged on the peripheral surface of the fixed threaded sleeve 44, at least two open slots 49 are formed in the side wall of the fixed threaded sleeve 44 from top to bottom, two open slots 49 are formed in the fixed threaded sleeve 44 relatively in this embodiment, and the open slots 49 are two thirds of the length of the fixed threaded sleeve 44. The height adjusting ring 45 is provided as an internally threaded ring, which is screwed onto the fixed threaded sleeve 44. The natural length of the jack spring 46 is greater than the length of the fixed threaded sleeve 44, and is sleeved in the fixed threaded sleeve 44, and the jack spring 46 is always in a compressed state in the embodiment. The mounting panel 47 sets up to the rectangular plate, fixed connection is in tight spring 46 upper end in the top, and mounting panel 47 is used for being connected fixedly with two-dimensional area array laser displacement meter 41, and mounting panel 47 lower surface vertical fixation has two connection peg 48, and connection peg 48 is located tight spring 46 in the top down's outside, and connection peg 48 wears to establish in the notch 49 from the top down, and the outer profile of protruding fixed screw sleeve 44 of outer buckling of lower extreme, and the kink butt is at the lower surface of altitude mixture control ring 45. The height adjusting ring 45 is rotated to enable the connecting hanging rod 48 to move together by dragging the height adjusting ring 45, and then the mounting plate 47 is driven to move up and down, so that the height of the two-dimensional area array laser displacement meter 41 is adjusted.
The underground water level monitoring system 5 is arranged on the periphery of the foundation pit and used for monitoring the condition of the underground water level on the periphery of the foundation pit, and each side of the periphery of the foundation pit is provided with a pore water pressure gauge which is the same as the distance between the side wall of the foundation pit in number and is connected with the controller 1, so that collected water level information is transmitted into the controller 1.
The pore water pressure meter adopts an FS-KY series vibrating string type osmometer which mainly comprises a permeable stone, a pressure-bearing membrane, a steel string, a fastening chuck and a coil, wherein the pressure-bearing membrane is connected with the steel string, and the steel string is pre-tensioned and fixed in a sensor. According to the classical string principle, the natural frequency of a steel string is fixed under certain chord length and stress. When the chord length is fixed, the square of the natural frequency of the steel chord is in direct proportion to the tension of the chord. When external water pressure acts on the pressure-bearing membrane of the osmometer through the permeable stone, the pressure-bearing membrane is slightly deformed, so that the tension of a steel string connected with the pressure-bearing membrane is changed, and the natural frequency of the steel string is also changed. The square of the natural frequency of the steel string is in direct proportion to the water pressure on the diaphragm, and the water pressure of the measured pore can be obtained by measuring the change of the frequency of the steel string.
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. The existing ultra-deep foundation pit safety monitoring system is characterized by comprising a controller (1), a sedimentation monitoring system (2), a prestress monitoring system (3), a horizontal displacement monitoring system (4) and a ground water level monitoring system (5), wherein the sedimentation monitoring system (2), the prestress monitoring system (3), the horizontal displacement monitoring system (4) and the ground water level monitoring system (5) are connected with the controller (1), feedback signals are sent to the controller (1), the controller (1) receives and processes the feedback signals, and sends control signals to an alarm module, and the alarm module sends alarm signals.
2. The existing ultra-deep foundation pit safety monitoring system according to claim 1, wherein the settlement monitoring system (2) comprises a liquid storage tank (21) and a plurality of static leveling instruments (22) arranged at the same horizontal height, a liquid through pipe (23) is arranged at the lower end of the liquid storage tank (21), the liquid through pipe (23) connects the static leveling instruments (22) in series, a vent pipe (24) is arranged at the upper end of the liquid storage tank (21), the vent pipe (24) connects the static leveling instruments (22) in series, and the liquid storage tank (21) is arranged on a supporting frame (25) and is higher than the static leveling instruments (22).
3. The existing ultra-deep foundation pit safety monitoring system according to claim 1, wherein the prestress monitoring system (3) comprises an anchor cable axial force meter (31) and a steel support axial force meter (32) which are connected with the controller (1), the anchor cable axial force meter (31) is installed on an anchor cable protruding on a foundation pit wall, and the steel support axial force meter (32) is installed on a steel support of the foundation pit wall.
4. An existing ultra-deep foundation pit safety monitoring system according to claim 1, wherein the horizontal displacement monitoring system (4) comprises a plurality of two-dimensional area array laser displacement meters (41) which are arranged in a straight line along the top wall of the foundation pit, and an adjustable bracket (42) for mounting the two-dimensional area array laser displacement meters (41), wherein the adjustable bracket (42) is mounted on the top wall of the foundation pit and is adjustable in height.
5. The existing ultra-deep foundation pit safety monitoring system according to claim 4, wherein the adjustable support (42) comprises a mounting base (43), a fixing threaded sleeve (44) fixed on the upper surface of the mounting base (43), a height adjusting ring (45) in threaded connection with the fixing threaded sleeve (44), a tightening spring (46) sleeved in the fixing threaded sleeve (44), a connecting hanging rod (48) connected between a mounting plate (47) at the upper end of the tightening spring (46) and the connecting mounting plate (47) and the height adjusting ring (45), at least two notch grooves (49) formed from top to bottom are formed in the side wall of the fixing threaded sleeve (44), the connecting hanging rod (48) is arranged in the notch grooves (49) in a penetrating mode, and the lower end of the connecting hanging rod is outwards bent to be abutted to the lower surface of the height adjusting ring (45).
6. An existing ultra-deep foundation pit safety monitoring system according to claim 1, characterized in that the ground water level monitoring system (5) comprises a plurality of pore water pressure meters (51) which are the same in distance from the side wall of the foundation pit, and the pore water pressure meters (51) are connected with the controller (1).
7. An existing ultra-deep foundation pit safety monitoring system according to any of claims 1-6, wherein the alarm module comprises a field alarm (6) electrically connected to the controller (1) and an information receiving terminal (8) connected to the controller (1) through a communication module (7), and the communication module (7) sends an alarm signal to the information receiving terminal (8) through digital information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323077870.2U CN221052702U (en) | 2023-11-14 | 2023-11-14 | Existing ultra-deep foundation pit safety monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323077870.2U CN221052702U (en) | 2023-11-14 | 2023-11-14 | Existing ultra-deep foundation pit safety monitoring system |
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| CN221052702U true CN221052702U (en) | 2024-05-31 |
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| CN202323077870.2U Active CN221052702U (en) | 2023-11-14 | 2023-11-14 | Existing ultra-deep foundation pit safety monitoring system |
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| CN (1) | CN221052702U (en) |
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2023
- 2023-11-14 CN CN202323077870.2U patent/CN221052702U/en active Active
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