CN114016555B - System and method for continuously monitoring horizontal displacement of deep foundation pit - Google Patents
System and method for continuously monitoring horizontal displacement of deep foundation pit Download PDFInfo
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- CN114016555B CN114016555B CN202111236772.1A CN202111236772A CN114016555B CN 114016555 B CN114016555 B CN 114016555B CN 202111236772 A CN202111236772 A CN 202111236772A CN 114016555 B CN114016555 B CN 114016555B
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- foundation pit
- laser range
- distance value
- plate
- connecting rod
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
Abstract
The application relates to the technical field of foundation pit construction monitoring, and provides a deep foundation pit horizontal displacement continuous monitoring system which comprises a controller, an alarm, a guide rod erected above a foundation pit and a plurality of reflecting plates arranged on the side wall of the foundation pit; the guide rod is parallel to the foundation pit, the guide rod is vertically provided with a connecting rod, the bottom end of the connecting rod is provided with a laser range finder, the guide rod is provided with a driving mechanism for driving the connecting rod to slide along the guide rod in a reciprocating manner, and the driving mechanism is also provided with a rotating assembly for driving the connecting rod to rotate; laser range finder, actuating mechanism and alarm all with controller electric connection, when the real-time distance value of laser range finder and reflecting plate is less than the warning distance value, alarm signal is sent to the alarm. This application has the effect of in time monitoring foundation ditch horizontal displacement.
Description
Technical Field
The application relates to the technical field of foundation pit monitoring, in particular to a system and a method for continuously monitoring horizontal displacement of a deep foundation pit.
Background
In the process of constructing the deep foundation pit, various vibration factors of a construction site can often cause horizontal displacement of soil bodies on two sides of the foundation pit, and the construction safety is influenced because adverse consequences such as landslide and even collapse can occur to the soil bodies on two sides of the foundation pit and the construction safety is influenced after long-time use, so that the horizontal displacement monitoring of the soil bodies on two sides of the foundation pit is required frequently in the process of constructing the foundation pit so as to master the horizontal displacement rule of the soil bodies on two opposite sides of the foundation pit, and relative measures are taken according to data so as to ensure the safety in the process of constructing the foundation pit.
At present, a plurality of reference objects are generally arranged on two sides of a foundation pit in a horizontal displacement monitoring mode, during monitoring, an operator operates a laser range finder at a position opposite to the reference objects to measure the positions of the reference objects, the real-time positions of the reference objects are obtained, and the real-time positions of the reference objects are compared with the positions in front of the reference objects, so that the horizontal displacement degree of the foundation pit is judged.
With respect to the above-described related art, the inventors consider that the following drawbacks exist: the mode of manually reciprocating multiple reference points to monitor the horizontal displacement of the foundation pit is usually to monitor at intervals, so that the horizontal displacement monitoring of the foundation pit is discontinuous, and the horizontal displacement degree of the foundation pit cannot be judged in time, so that an improvement space exists.
Disclosure of Invention
In order to measure the horizontal displacement of the foundation pit in time, the application provides a system and a method for continuously monitoring the horizontal displacement of the deep foundation pit.
The application provides a deep basal pit horizontal displacement continuous monitoring system adopts following technical scheme:
a continuous monitoring system for horizontal displacement of a deep foundation pit comprises a controller, an alarm, a guide rod erected above the foundation pit and a plurality of reflecting plates arranged on two opposite side walls of the foundation pit; the length direction of the guide rod is parallel to the length direction of the foundation pit, the guide rod is vertically provided with a connecting rod, the bottom end of the connecting rod is provided with a laser range finder, the guide rod is provided with a driving mechanism for driving the connecting rod to slide along the guide rod in a reciprocating manner, and the driving mechanism is also provided with a rotating assembly for driving the connecting rod to rotate; laser range finder, actuating mechanism and alarm all with controller electric connection, the controller is used for making the comparison with the real-time distance value of laser range finder and reflecting plate with predetermined warning distance value and feeds back the alarm with the result, works as when the real-time distance value of laser range finder and reflecting plate is less than warning distance value, alarm signal sends alarm signal.
By adopting the technical scheme, the controller is used for controlling the driving mechanism and the rotating assembly to drive the laser range finder to measure the initial position of each group of reflecting plates, the initial displacement value of the laser range finder and each group of reflecting plates is obtained, the alarm displacement value of the group of reflecting plates is set in the controller according to the initial distance value, the controller is used for controlling the driving mechanism to drive the laser range finder to measure the actual displacement value of each group of reflecting plates and the laser range finder in a continuous and cyclic measurement mode and inputting the actual displacement value into the controller for being compared with the alarm distance value of the group of reflecting plates, if the real-time distance value is larger than the alarm distance value, the rest groups of reflecting plates are continuously measured, if the real-time distance value is smaller than the alarm distance value, the controller is used for controlling the alarm to send an alarm signal to remind a construction party, compared with the traditional mode of manually operating the laser range finder in an interval time period to monitor the horizontal displacement of the foundation pit in time and continuously, the construction safety can be better guaranteed.
Preferably, the driving mechanism includes a driving plate slidably clamped on the guide rod, the sliding direction of the driving plate is parallel to the length direction of the guide rod, the driving plate vertically rotates a main gear, the guide rod is provided with a rack, the main gear is meshed with the rack, and the driving plate is further provided with a driving part for driving the main gear to rotate.
By adopting the technical scheme, the main gear is meshed with the rack, and the main driving part is used for driving the main gear to rotate forwards and backwards so as to drive the driving plate, the connecting rod and the laser range finder to reciprocate along the length direction of the guide rod, so that the laser range finder can move more simply and conveniently;
preferably, the connecting rod vertically penetrates through the driving plate, the rotating assembly comprises a pinion coaxially fixed on the connecting rod, the pinion is positioned on the upper surface of the driving plate, and the pinion is meshed with the main gear; the reflecting plates of the side wall of the foundation pit are uniformly distributed along the length direction of the foundation pit and the reflecting plates of the two opposite side walls of the foundation pit are arranged in a staggered mode.
Through adopting above-mentioned technical scheme, through master gear and pinion meshing for laser range finder can rotate the length direction removal along the deflector rod on the limit, and the reflecting plate through two relative inner walls of foundation ditch sets up in the wrong order, makes laser range finder rotate behind the certain number of turns alright with the relative of the reflecting plate on the foundation ditch lateral wall, thereby the real-time distance value of laser range finder measurement self and reflecting plate of being convenient for.
Preferably, the bottom end of the connecting rod is in a ball head shape, a counterweight plate is further arranged at the bottom end of the connecting rod in a ball-stranding manner, a limiting frame for inserting the laser range finder is arranged at the bottom side of the counterweight plate, a locking part for limiting the laser range finder to slide is arranged on the limiting frame, and the gravity centers of the counterweight plate, the limiting frame, the laser range finder and the locking part are located right below the axis of the connecting rod; the counterweight plate is provided with a hinge groove for ball twisting at the bottom end of the connecting rod, the end part of the bottom end of the connecting rod is provided with a sliding hole, the sliding hole is connected with a rubber block in a sliding manner, and the connecting rod is provided with a lifting assembly for driving the rubber block to slide up and down.
By adopting the technical scheme, when the weight plate is ball-twisted with the connecting rod, the weight plate can be always kept in a horizontal state, so that the laser range finder can be used for measuring in a horizontal state; the laser range finder is beneficial to reducing the situation that the laser range finder is inclined due to the fact that the guide rod is not horizontally arranged or the vibration generated by foundation pit construction is caused, so that the measurement accuracy of the laser range finder is influenced; when the counterweight plate rotates along with the connecting rod, the rubber block is driven by the lifting assembly to slide to abut against the inner wall of the hinge groove, so that the connecting rod can drive the counterweight block and the laser range finder to rotate together; when the connecting rod drives the laser range finder to rotate to be aligned with the reflecting plate, the rubber block is driven to retract into the sliding hole through the auxiliary driving piece, so that the ball-stranding state of the counterweight plate and the bottom end of the connecting rod is recovered, and the laser range finder can be kept horizontal.
Preferably, the two ends of the guide rod are both provided with a beam rod, the two ends of the beam rod stretch over the foundation pit and abut against the ground, the two ends of the guide rod are both vertically and downwardly rotatably connected with a rotating rod, the rotating rod penetrates through the beam rod, and the beam rod is provided with a sliding through hole for the rotating rod to penetrate through; the guide rod is also provided with a limiting assembly which enables the guide rod to be relatively fixed with the foundation pit.
Through adopting above-mentioned technical scheme, remove two sets of crossbeam poles through the direction that is close to each other, alright fold two sets of crossbeam poles and guide bar and accomodate, through setting up spacing subassembly, utilize spacing subassembly to make guide bar and foundation ditch keep relatively fixed for the guide bar is difficult for taking place relative rotation with the crossbeam pole.
Preferably, spacing subassembly is including setting up in the horizontal plate of bull stick bottom, the horizontal plate both ends are all perpendicular downwards to be provided with the fixed plate, crossbeam pole bottom is provided with the thread bush, thread bush both ends screw thread sets up in the opposite direction, the equal threaded connection in thread bush both ends has the screw rod, two sets of fixed plates are worn to locate respectively perpendicularly by the screw rod at thread bush both ends, the screw rod all is provided with the gag lever post, the gag lever post is parallel with the screw rod just the fixed plate is worn to locate by the gag lever post.
Through adopting above-mentioned technical scheme, rotate the threaded sleeve for two sets of screw rods are kept away from each other, and the one end of keeping away from each other up to two sets of screw rods supports tightly with the inner wall that the foundation ditch is relative respectively, alright realize that guide bar and foundation ditch lateral wall keep relatively fixed, can also make guide bar length direction and foundation ditch length direction parallel simultaneously, and the laser range finder of being convenient for measures the position of reflecting plate higher.
Preferably, the reflecting plate top is provided with the mounting panel, the mounting panel is provided with the installation pole perpendicularly, the one end that the mounting panel was kept away from to the installation pole is articulated with the reflecting plate top, reflection axis of revolution level sets up.
By adopting the technical scheme: the top end of the reflecting plate is hinged to the mounting plate, so that the reflecting plate can be always kept in a vertical downward state under the action of gravity, and the laser range finder can more accurately measure the real-time position of the reflecting plate.
A method for continuously monitoring horizontal displacement of a deep foundation pit comprises the following steps: the method comprises the following steps:
s1: the controller controls the driving mechanism and the rotating assembly to drive the laser range finders to measure the initial distance value between each group of reflecting plates and the laser range finders;
s2: setting an alarm distance value of each group of reflecting plates in the controller according to the initial distance value of each group of reflecting plates and the laser range finder;
s3: the controller controls the driving mechanism and the rotating assembly to drive the laser range finders to circularly measure the real-time distance value between each group of reflecting plates and the laser range finders; after a group of reflecting plates are measured, feeding back the real-time distance value between the group of reflecting plates and the laser range finder to the controller;
s4: the controller compares the real-time distance value between the laser range finder and the reflecting plate with the alarm distance value of the group of reflecting plates, and if the real-time distance value is greater than the alarm distance value, the step S3 is continuously repeated; if the real-time distance value is smaller than the alarm distance value, the real-time distance value is fed back to the alarm and an alarm signal is sent out by the alarm.
By adopting the technical scheme, the laser distance measuring instrument is used for circularly and continuously measuring the real-time distance value of each group of reflecting plates and feeding the real-time distance value back to the controller to be compared with the preset alarm distance value, when the real-time distance value is abnormal, the controller can control the alarm to send out an alarm signal, so that the monitoring of the horizontal displacement quantity of the two sides of the foundation pit is facilitated, and the foundation pit construction is safer.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the driving mechanism, the laser range finder and the alarm are electrically connected with the controller, so that the controller can control the driving mechanism to drive the laser range finder to circularly measure the real-time distance value from each group of reflecting plates to the laser range finder and feed back the real-time distance value to the controller, if the real-time distance value is greater than the alarm distance value, the real-time distance value is fed back to the alarm and sends an alarm signal to remind a construction party, thereby realizing the continuous monitoring of the horizontal displacement of the deep foundation pit and being beneficial to detecting the horizontal displacement of the foundation pit in time;
2. the main gear is arranged on the driving plate and meshed with the rack, and the main driving piece drives the main gear to rotate forwards or reversely, so that the connecting rod can reciprocate along the guide rod, and the reciprocating movement of the connecting rod and the laser range finder is simpler and more convenient;
3. keep away from the one end of mounting panel articulated through reflecting plate top and installation pole for the reflecting plate can remain vertical state throughout, makes the distancer can be more accurate get the real-time position of reflecting plate, thereby makes the displacement volume of reflecting plate more accurate.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic diagram of a laser range finder and a counterweight plate according to an embodiment of the present application;
FIG. 3 is a cut-away schematic view of an embodiment of the present application illustrating a weight plate and a connecting rod;
FIG. 4 is an enlarged schematic view of section A of FIG. 1;
FIG. 5 is an enlarged schematic view of section B of FIG. 1;
FIG. 6 is an enlarged schematic view of section C of FIG. 1;
figure 7 is a schematic illustration of the present application as implemented for two sets of beam bars and guide bars when folded.
Description of reference numerals:
1. a beam rod; 10. a slip through hole; 2. a guide rod; 21. a chute; 22. a strip through hole; 23. a rotating rod; 24. a horizontal plate; 241. a fixing plate; 25. a threaded sleeve; 26. a screw; 261. a limiting plate; 262. a limiting rod; 3. a connecting rod; 30. a slide hole; 31. a weight plate; 310. a hinge slot; 32. a limiting frame; 321. a locking portion; 33. a laser range finder; 35. a drive rod; 351. a clamping strip; 34. a rubber block; 36. a cylinder; 4. a drive mechanism; 41. a drive plate; 411. a frame; 42. a main gear; 43. a drive member; 44. a rack; 5. a pinion gear; 6. a reflective plate; 61. mounting a rod; 62. and (7) mounting the plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
The embodiment of the application discloses a system for continuously detecting horizontal displacement of a deep foundation pit, which is shown in a figure 1 and a figure 2 and comprises a controller, an alarm, a guide rod 2 and a plurality of reflecting plates 6; the guide rod 2 is erected above the foundation pit, the length direction of the guide rod 2 is parallel to the length direction of the foundation pit, the reflecting plates are respectively installed on two opposite side walls of the foundation pit, the guide rod 2 is vertically provided with a connecting rod 3, and the bottom end of the connecting rod 3 is provided with a laser range finder 33; the guide rod 2 is further provided with a driving mechanism 4 for driving the connecting rod 3 to reciprocate along the length direction of the guide rod 2, and the driving mechanism 4 is further provided with a rotating assembly for driving the connecting rod 3 to rotate. Actuating mechanism 4, laser range finder 33 and alarm three all with controller electric connection, the controller is used for will being used for comparing reflecting plate 6 and laser range finder 33 real-time distance value and predetermined warning distance value and feeding back the result to the alarm, when reflecting plate 6 and laser range finder 33 real-time distance value are greater than predetermined warning distance value, alarm signal is sent to the alarm.
In this embodiment, the alarm is a buzzer alarm, and the controller includes an electronic control unit for controlling the driving mechanism 4, a comparison unit for comparing the real-time distance between the reflection plate 6 and the laser distance meter 33 with a preset alarm distance value, and a feedback unit for feeding back a signal to the alarm.
Referring to fig. 2 and 3, the bottom end of the connecting rod 3 is spherically arranged, the bottom end of the connecting rod 3 is further provided with a weight plate 31, the weight plate 31 is connected with the bottom end of the connecting rod 3 in a ball hinge manner, and the upper surface of the weight plate 31 is provided with a hinge slot 310 for the bottom end of the connecting rod 3 to be inserted into; the bottom side of the weight plate 31 is further fixed with a limiting frame 32 for inserting the laser distance meter 33, and the limiting frame 32 is further provided with a locking part 321 for limiting the sliding of the laser distance meter 33. The centers of the weight plate 31, the limiting frame 32, the laser range finder 33 and the locking part 321 are located under the axis of the connecting rod 3, so that the weight plate 31 and the laser range finder 33 can be always kept in a horizontal state, and the situation that the laser range finder 33 is inclined in the measuring process due to the reduction of construction vibration and the like and the measuring precision of the laser range finder 33 is influenced is facilitated.
Referring to fig. 2 and 3, a sliding hole 30 has been seted up to connecting rod 3 bottom, sliding joint has rubber block 34 in the sliding hole 30, connecting rod 3 still is provided with the lifting unit who orders about rubber block 34 and goes up and down, when making counterweight plate 31 and connecting rod 3 together rotate, accessible lifting unit orders about rubber block 34 and slides downwards until rubber block 34 and articulated groove 310 inner wall butt, alright make connecting rod 3 drive counterweight plate 31 together and rotate to realize that laser range finder 33 and connecting rod 3 together rotate. When the laser distance measuring instrument 33 needs to be kept horizontal, the rubber block 34 is driven to slide upwards through the lifting assembly until the rubber block 34 leaves the inner wall of the hinge groove 310, so that the ball-hinge connection between the connecting rod 3 and the counterweight plate 31 can be recovered, and the laser distance measuring instrument 33 is kept horizontal conveniently.
Referring to fig. 2 and 3, lifting unit includes fixed connection at the actuating lever 35 on fixed block top, connecting rod 3 is worn to locate by actuating lever 35, connecting rod 3 still sets up the perforation that supplies actuating lever 35 to wear to establish, perforation and the coaxial intercommunication of slide opening 30, actuating lever 35 outer wall is fixed with joint strip 351, joint strip 351 and actuating lever 35 parallel arrangement, the joint groove of supplying joint strip 351 embedding is seted up in the perforation, make connecting rod 3 can drive actuating lever 35 and together rotate, lifting unit is still including installing cylinder 36 on connecting rod 3 top, the piston rod tip and the coaxial fixed connection in actuating lever 35 top of cylinder 36.
Referring to fig. 2 and 3, the locking portion 321 includes a locking bolt threaded through the side wall of the limiting frame 32, and the locking bolt extends into the limiting frame 32 and abuts against the laser range finder 33, so that the laser range finder 33 is not easily thrown out of the limiting frame 32 during the rotation process.
Referring to fig. 1 and 4, the driving mechanism 4 includes a driving plate 41 slidably clamped on the guide rod 2, the driving plate 41 is provided with a sliding slot 21 for slidably clamping the guide rod 2, and the length direction of the sliding slot 21 is parallel to the length direction of the guide rod 2; drive plate 41 and spout 21 are worn to locate by connecting rod 3, and the rectangular through-hole 22 that supplies connecting rod 3 to wear to establish is seted up to spout 21 bottom, and the length direction of rectangular through-hole 22 is parallel with the length direction of guide bar 2. A main gear 42 is vertically and rotatably connected to the upper surface of the driving plate 41, a rack 44 is further fixed to one side of the guide rod 2, the rack 44 is meshed with the main gear 42, the rack 44 is parallel to the sliding chute 21 in the length direction, a rack 411 is fixed to the driving plate 41, a driving member 43 for driving the main gear 42 to rotate is mounted on the rack 411, in this embodiment, the driving member 43 is a motor, and an output shaft of the motor is coaxially and fixedly connected to the main gear 42. The driving member 43 drives the main gear 42 to rotate forward and backward to drive the connecting rod 3 and the laser range finder 33 to reciprocate along the guide rod 2.
Referring to fig. 1 and 4, the rotating assembly includes a pinion 5, the pinion 5 is coaxially and fixedly connected to the top end of the connecting rod 3, the pinion 5 is located on the upper surface of the driving plate 41, and the pinion 5 is meshed with the main gear 42, so that the driving member 43 drives the main gear 42 to rotate and simultaneously drives the pinion 5 to rotate, thereby enabling the laser range finder 33 to move along the length direction of the guide rod 2 and simultaneously rotate.
Referring to fig. 1 and 4, the plurality of reflective plates 6 on the sidewall of the foundation pit are uniformly distributed along the length direction of the sidewall of the foundation pit, and the reflective plates 6 on the two opposite sidewalls of the foundation pit are arranged in a staggered manner. The reflecting plate 6 is located at the same level as the laser rangefinder 33. Through the setting of reflector 6 on the relative both sides wall of foundation ditch phase error for laser range finder 33 every rotates certain angle after alright be relative with reflector 6 on the lateral wall of foundation ditch one side, the laser range finder 33 of being convenient for measures the position of reflector 6 on the relative both sides wall of foundation ditch better.
Referring to fig. 4 and 5, a mounting plate 62 is arranged at the top end of the reflection plate 6, a mounting rod 61 is vertically fixed on the mounting plate 62, one end of the mounting rod 61, which is far away from the mounting plate 62 in the length direction, is hinged to the reflection plate 6, the rotation axis of the reflection plate 6 is horizontally arranged, and the mounting plate 62 is fixed on the side wall of the foundation pit through an anchor bolt. The top end of the reflecting plate 6 is hinged to the mounting rod 61, so that the reflecting plate 6 can keep a vertically downward state through gravity, the reflecting plate 6 is not prone to tilting, and the laser range finder 33 can measure better.
Referring to fig. 6 and 7, 2 both ends of guide bar all are provided with crossbeam pole 1, crossbeam pole 1 span foundation ditch top and with the ground butt, 2 both ends of guide bar all rotate downwards perpendicularly and are connected with bull stick 23, the bull stick 23 at 2 both ends of guide bar respectively with two sets of crossbeam poles 1 one-to-one, bull stick 23 wears to locate corresponding crossbeam pole 1, crossbeam pole 1 is offered and is used for supplying the through-hole 10 that slides that bull stick 23 wore to establish, both length direction parallel arrangement between through-hole 10 and crossbeam pole 1 slide. Through the arrangement, the guide rods 2 can be erected on the two groups of beam rods 1, so that the guide rods 2 are more stably erected on the foundation pit; simultaneously, toward the direction that is close to each other remove two sets of crossbeam poles 1, alright realize folding two sets of crossbeam poles 1 and guide bar 2 and accomodate, be favorable to sparingly accomodating the space.
Referring to fig. 6 and 7, the guide rod 2 is further provided with a limiting assembly for limiting the guide rod to be relatively fixed with the foundation pit, the limiting assembly comprises a horizontal plate 24 fixed at the bottom end of the rotating rod 23, the joint of the horizontal plate 24 and the rotating rod 23 is located at the center of the upper surface of the horizontal plate 24, two ends of the horizontal plate 24 are vertically and downwardly fixedly connected with fixing plates 241, the bottom side of the horizontal plate 24 is further provided with threaded sleeves 25, and two ends of each threaded sleeve 25 face the two groups of fixing plates 241 respectively; the screw threads at the two ends of the threaded sleeve 25 are reversely arranged, the two ends of the threaded sleeve 25 are in threaded connection with screw rods 26, and the screw rods 26 at the two ends of the threaded sleeve 25 penetrate through the two groups of fixing plates 241 respectively and vertically.
Referring to fig. 1 and 7, the screws 26 are both vertically provided with a limiting plate 261, the limiting plate 261 is vertically provided with a limiting rod 262, and the length direction of the limiting rod 262 is parallel to the axial direction of the screws 26; the limiting rod 262 is inserted into the fixing plate 241, so that the screw 26 does not rotate when the threaded sleeve 25 rotates. When the guide rod 2 is erected, firstly, two groups of beam rods 1 stretch over the foundation pit and abut against the ground, then the horizontal plate 24 is swung to enable two groups of screw rods 26 to respectively oppose two opposite inner walls of the foundation pit, the threaded sleeve 25 is rotated to enable the two groups of screw rods 26 to extend out, and when the two groups of screw rods 26 respectively abut against the opposite inner walls of the foundation pit, the guide rod 2 and the foundation pit can be relatively fixed; meanwhile, the two groups of screw rods 26 are respectively abutted against the two opposite inner walls of the foundation pit, so that the length directions of the guide rod 2 and the foundation pit can be the same.
A monitoring method of a deep foundation pit horizontal displacement continuous monitoring system comprises the following steps:
s1: the controller controls the driving mechanism 4 and the rotating assembly to drive the laser range finders 33 to measure the initial distance value between each group of reflecting plates 6 and the laser range finders 33; in the measuring process, the laser distance measuring instrument 33 is measured after being aligned with the reflecting plate 6, so that the measuring precision of the laser distance measuring instrument 33 is ensured.
S2: setting an alarm distance value of each group of reflecting plates 6 in a comparison unit of the controller according to the initial distance value of each group of reflecting plates 6 and the laser range finder 33; the alarm distance value is set in consideration of the vibration factor of a construction site and the soil property factor of a foundation pit.
S3: the controller controls the driving mechanism 4 and the rotating assembly to drive the laser range finders 33 to circularly measure the real-time distance value between each group of reflecting plates 6 and the laser range finders 33; after the laser distance meter 33 has measured a group of reflective plates 6, the laser distance meter 33 should be stopped moving and the real-time distance between the group of reflective plates 6 and the laser distance meter 33 should be transmitted to the comparison unit of the controller.
S4: the comparison unit compares the real-time distance value between the laser range finder 33 and the reflecting plate 6 with the alarm distance value of the group of reflecting plates 6, if the real-time distance value between the reflecting plate 6 and the laser range finder 33 is greater than the alarm distance value of the group of reflecting plates 6, the step S3 is continuously repeated, and the controller continuously controls the driving mechanism 4 and the rotating assembly to control the laser range finder 33 to measure the reflecting plates 6 of other groups; if the real-time distance value between the reflecting plate 6 and the laser range finder 33 is smaller than the alarm distance value of the group of reflecting plates 6, the signal is fed back to the alarm through the feedback unit of the controller and the alarm sends out an alarm signal to remind a construction party of taking relative measures.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides a deep basal pit horizontal displacement continuous monitoring system which characterized in that: comprises a controller, an alarm, a guide rod (2) erected above a foundation pit and a plurality of reflecting plates (6) arranged on two opposite side walls of the foundation pit; the length direction of the guide rod (2) is parallel to the length direction of the foundation pit, the guide rod (2) is vertically provided with a connecting rod (3), the bottom end of the connecting rod (3) is provided with a laser range finder (33), the guide rod (2) is provided with a driving mechanism (4) for driving the connecting rod (3) to slide along the guide rod (2) in a reciprocating manner, and the driving mechanism (4) is further provided with a rotating assembly for driving the connecting rod (3) to rotate; the laser range finder (33), the driving mechanism (4) and the alarm are electrically connected with the controller, the controller is used for comparing the real-time distance value between the laser range finder (33) and the reflecting plate (6) with a preset alarm distance value and feeding back the result to the alarm, and when the real-time distance value between the laser range finder (33) and the reflecting plate (6) is smaller than the alarm distance value, the alarm sends an alarm signal; the bottom end of the connecting rod (3) is in a ball head shape, a counterweight plate (31) is further arranged at the bottom end of the connecting rod (3) in a ball-hinged mode, a limiting frame (32) for inserting the laser range finder (33) is arranged on the bottom side of the counterweight plate (31), a locking part (321) for limiting the sliding of the laser range finder (33) is arranged on the limiting frame (32), and the gravity centers of the counterweight plate (31), the limiting frame (32), the laser range finder (33) and the locking part (321) are located right below the axis of the connecting rod (3); the improved steel wire rope connecting rod is characterized in that a hinged groove (310) for ball twisting of the bottom end of the connecting rod (3) is formed in the counterweight plate (31), a sliding hole (30) is formed in the end portion of the bottom end of the connecting rod (3), the sliding hole (30) is connected with a rubber block (34) in a sliding mode, and the connecting rod (3) is provided with a lifting assembly for driving the rubber block (34) to slide up and down.
2. The continuous monitoring system for the horizontal displacement of the deep foundation pit according to claim 1, wherein: drive mechanism (4) are including sliding joint drive plate (41) on guide bar (2), drive plate (41) slip direction is parallel with guide bar (2) length direction, drive plate (41) vertical rotation has master gear (42), guide bar (2) are provided with rack (44), master gear (42) and rack (44) meshing setting, drive plate (41) still are provided with drive master gear (42) pivoted driving piece (43).
3. The continuous monitoring system for the horizontal displacement of the deep foundation pit according to claim 2, wherein: the connecting rod (3) vertically penetrates through the driving plate (41), the rotating assembly comprises a pinion (5) coaxially fixed on the connecting rod (3), the pinion (5) is located on the upper surface of the driving plate (41), and the pinion (5) is meshed with the main gear (42); and the plurality of reflecting plates (6) on the side wall of the foundation pit are uniformly distributed along the length direction of the foundation pit, and the reflecting plates (6) on the two opposite side walls of the foundation pit are arranged in a staggered manner.
4. The continuous monitoring system for the horizontal displacement of the deep foundation pit according to claim 1, wherein: the two ends of the guide rod (2) are respectively provided with a cross beam rod (1), the two ends of each cross beam rod (1) stretch over the foundation pit and abut against the ground, the two ends of each guide rod (2) are vertically and downwards connected with a rotating rod (23) in a rotating mode, the rotating rods (23) penetrate through the cross beam rods (1), and the cross beam rods (1) are provided with sliding through holes (10) for the rotating rods (23) to penetrate through; the guide rod (2) is further provided with a limiting assembly for keeping the guide rod and the foundation pit relatively fixed.
5. The continuous monitoring system for the horizontal displacement of the deep foundation pit according to claim 4, wherein: spacing subassembly is including setting up in horizontal plate (24) of bull stick (23) bottom, fixed plate (241) are provided with perpendicularly downwards in horizontal plate (24) both ends all, crossbeam pole (1) bottom is provided with threaded sleeve (25), threaded sleeve (25) both ends screw thread sets up in reverse, threaded sleeve (25) both ends equal threaded connection has screw rod (26), two sets of fixed plate (241) are worn to locate respectively perpendicularly in screw rod (26) at threaded sleeve (25) both ends, screw rod (26) all are provided with gag lever post (262), gag lever post (262) are parallel with screw rod (26) just fixed plate (241) are worn to locate in gag lever post (262).
6. The continuous monitoring system for the horizontal displacement of the deep foundation pit according to claim 1, wherein: reflecting plate (6) top is provided with mounting panel (62), mounting panel (62) are provided with installation pole (61) perpendicularly, the one end that mounting panel (62) were kept away from in mounting panel (62) is articulated with reflecting plate (6) top, the axis of revolution level setting of reflecting plate (6).
7. A monitoring method of a deep foundation pit horizontal displacement continuous monitoring system based on any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1: the controller controls the driving mechanism (4) and the rotating assembly to drive the laser range finders (33) to measure the initial distance value between each group of reflecting plates (6) and the laser range finders (33);
s2: setting an alarm distance value of each group of reflecting plates (6) in the controller according to the initial distance value of each group of reflecting plates (6) and the laser range finder (33);
s3: the controller controls the driving mechanism (4) and the rotating assembly to drive the laser range finders (33) to circularly measure the real-time distance value between each group of reflecting plates (6) and the laser range finders (33); after a group of reflecting plates (6) are measured, feeding back a real-time distance value between the group of reflecting plates (6) and the laser range finder (33) to the controller;
s4: the controller compares the real-time distance value between the laser range finder (33) and the reflecting plate (6) with the alarm distance value of the group of reflecting plates (6), and if the real-time distance value is greater than the alarm distance value, the step S3 is continuously repeated; if the real-time distance value is smaller than the alarm distance value, the real-time distance value is fed back to the alarm and an alarm signal is sent out by the alarm.
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