CN114718128B - Deep foundation pit deformation monitoring alarm device - Google Patents
Deep foundation pit deformation monitoring alarm device Download PDFInfo
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- CN114718128B CN114718128B CN202210356312.0A CN202210356312A CN114718128B CN 114718128 B CN114718128 B CN 114718128B CN 202210356312 A CN202210356312 A CN 202210356312A CN 114718128 B CN114718128 B CN 114718128B
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- monitoring
- rod
- foundation pit
- positioning
- rods
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 121
- 239000004927 clay Substances 0.000 claims abstract description 27
- 239000002689 soil Substances 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000001035 drying Methods 0.000 claims description 15
- 230000004888 barrier function Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 5
- 230000000903 blocking effect Effects 0.000 claims 3
- 239000012528 membrane Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010030 laminating Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000012876 topography Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009950 felting Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
Abstract
The application relates to the technical field of foundation pit monitoring, discloses a deep basal pit deformation monitoring alarm device, and it includes locating rack, vertical slip wears to locate many monitoring rods in the locating rack and sets up the display module that is used for showing the vertical displacement volume of monitoring rod on the locating rack, display module is including setting up fixed network, the tiling that separates on the fixed network keeps off the membrane and tiling separates the clay on keeping off the membrane on the locating rack, be formed with a plurality of fixed orificess between the net twine of fixed network, the bottom of monitoring rod is laminated with the hole bottom soil of foundation pit, top and is located the laminating of keeping off the membrane under the adjacent fixed orifices to the monitoring rod can be worn out from adjacent fixed orifices. This application has the efficient effect of monitoring.
Description
Technical Field
The application relates to the technical field of foundation pit monitoring, in particular to a deep foundation pit deformation monitoring alarm device.
Background
The deep foundation pit refers to a project with excavation depth of not less than 5 m or depth of not more than 5 m, but with particularly complex geological conditions, surrounding environment and underground pipelines. In the process of excavation of a foundation pit, when the dead weight of the soil body outside the retaining wall and the external load exceed the bearing capacity of the foundation below the bottom of the foundation pit, the balance state of the soil body in the foundation is destroyed, so that the flow of soil on the wall of the pit occurs, the soil on the bottom of the pit is raised upwards, and the phenomenon is called foundation pit raising. Since the amount of foundation pit bottom elevation can reflect the steady state of the foundation pit to some extent, foundation pit elevation is a very important indicator in foundation pit monitoring.
In the prior art, the conventional monitoring mode of foundation pit bulge is as follows: firstly, drilling an observation hole in the bottom of a foundation pit through a drilling machine, then, protecting the wall in the observation hole through a PVC pipe sleeve, then, putting a wooden or steel caliper into the sleeve, and finally, observing the reading of the caliper through a level gauge or a total station.
With respect to the related art in the above, the inventors consider that there are the following drawbacks: for the deformation condition of monitoring different positions, need to go through a plurality of steps such as boring a plurality of observation holes, setting gradually PVC pipe box and placing slide caliper rule in the foundation ditch bottom, monitoring efficiency is low, remains to improve.
Disclosure of Invention
In order to improve monitoring efficiency, the application provides a deep basal pit deformation monitoring alarm device.
The application provides a deep basal pit deformation monitoring alarm device adopts following technical scheme:
the utility model provides a deep basal pit deformation monitoring alarm device, includes locating rack, vertical slip wears to locate many monitoring bars in the locating rack and sets up the display module that is used for showing the vertical displacement volume of monitoring bar on the locating rack, display module keeps off the membrane and the clay of tiling on keeping off the membrane including setting up fixed network, tiling on the fixed network, be formed with a plurality of fixed orificess between the net twine of fixed network, the bottom of monitoring bar is laminated with the hole bottom soil of foundation ditch, the top is laminated with the fender membrane that separates that is located under the adjacent fixed orifices to the monitoring bar can wear out from adjacent fixed orifices.
Through adopting above-mentioned technical scheme, when monitoring foundation ditch uplift condition, the locating rack is fixed in the bottom of foundation ditch that awaits measuring, and the bottom and the hole bottom soil laminating of each monitoring rod, top and the laminating of separating the fender membrane. If the foundation pit bulge phenomenon occurs, the bulge part of the foundation pit bottom soil can lift up the monitoring rod at the corresponding position, so that the monitoring rod extrudes the clay right above the monitoring rod, and the clay forms a local bulge so as to reflect the bulge state of the foundation pit on the clay. After the monitoring is finished, staff can observe the deformation condition of clay and the displacement of the monitoring rod to calculate the condition of foundation pit bulge, and the monitoring is visual and convenient. The monitoring mode does not need to drill the observation hole at the bottom of the foundation pit in advance, so that labor is saved, convenience is realized, the monitoring position can be flexibly changed, and the monitoring efficiency is high.
Optionally, the locating rack includes two locating levers that set up relatively, fixes many connecting rods that set up between two locating levers and fixes the portal frame that sets up between two locating levers, display element sets up on the portal frame, every a plurality of connecting holes that supply the monitoring pole to wear out have all been seted up on the connecting rod, the below of locating lever is provided with at least one inserted bar, the one end that the locating bar was kept away from to the inserted bar is pointed end.
Through adopting above-mentioned technical scheme, the connecting rod is provided with many and has all offered a plurality of connecting holes for same monitoring devices can carry out the multiple spot to the foundation ditch and monitor, helps improving monitoring accuracy. The locating rack is pegged graft through the inserted bar with the hole bottom soil of foundation ditch, has the effect of convenient dismouting.
Optionally, be provided with the guide holder that equals with connecting hole quantity on the connecting rod, the guide holder is including being located the guide ring and fixed a plurality of bracing pieces that set up between guide ring and connecting rod directly over the connecting hole, the guiding hole that supplies the monitoring pole to wear out has been seted up at the middle part of guide ring.
Through adopting above-mentioned technical scheme, monitor rod wears to locate in connecting hole and the guiding hole in step, and it is difficult for empting when receiving the inclination effort that pit bottom soil produced because of the uplift, is favorable to accurate measuring and calculating the vertical deflection of pit bottom soil.
Optionally, a stop rod is connected to the side wall of the guide hole in a threaded manner, one end of the stop rod extending into the guide hole is rotatably provided with a stop block, and the side surface of the stop block, which is close to the central axis of the guide ring, is a concave cambered surface.
Through adopting above-mentioned technical scheme, when shifting monitoring alarm, after the guiding hole was worn to locate by the monitoring pole, accessible rotatory stop lever for the stop block compresses tightly the monitoring pole, with prevent that the monitoring pole from shifting out guide ring and connecting rod under self gravity effect, help improving the stability of monitoring pole and monitoring device's wholeness. The concave cambered surface can increase the contact area between the stop block and the monitoring rod, so that the positioning effect of the stop block on the monitoring rod is improved.
Optionally, be provided with the taut spare that is used for driving to separate the film and keep the tensioning state on the portal frame, the taut spare includes two wind-up rolls that rotate to set up on the portal frame and cover are established the torsional spring in the wind-up roll outside, separate the both ends of keeping off the film and twine respectively and set up on different wind-up rolls, the one end of torsional spring is fixed on the circumference lateral wall of wind-up roll, the other end butt is on the portal frame.
Through adopting above-mentioned technical scheme, keep apart and keep off the membrane and remain tensioning state all the time under the drive of taut spare, help guaranteeing to keep off the support strength of membrane to the clay for when the clay is deformation under the promotion of monitor rod, keep off the membrane and be difficult for producing the fold. After the monitoring is finished, when the monitoring rod is moved to be separated from clay, the separation membrane can automatically reset to a tensioning state under the action of the elasticity of the torsion spring, so that the separation membrane and the clay bulge part are automatically separated, the deformation of the clay can be measured by staff, and the measurement accuracy can be guaranteed.
Optionally, be provided with on the portal frame and be located the fixed network directly over and the height-adjustable baffle, be provided with the sensor that is used for detecting baffle bottom surface atress condition on the baffle, the last electricity of sensor is connected with the alarm.
Through adopting above-mentioned technical scheme, when clay and baffle butt under the promotion of monitor rod, the sensor detects the baffle atress and can send alarm signal for the alarm starts, has reached critical state with the uplift volume of reminding staff's hole bottom soil. The height of the baffle can be adjusted, so that the critical bulge can be adjusted according to different geological environments, and the method is suitable for monitoring different foundation pits.
Optionally, a mounting cavity extending along the length direction of the positioning rod is formed in the positioning rod, a monitoring assembly is arranged in the mounting cavity, and the monitoring assembly comprises a water ball arranged in the mounting cavity in a sliding manner, needles respectively arranged at two ends of the length direction of the mounting cavity and a drying bag respectively arranged at two ends of the length direction of the mounting cavity; the water ball comprises a balloon with water inside, and the puncture needle is positioned between the drying bag and the water ball; the drying bag is filled with color-changing silica gel drying agent, and the positioning rod is provided with a transparent observation window for observing the color of the drying bag in the installation cavity.
Through adopting above-mentioned technical scheme, locating lever is in horizontal position during initial state, and the water polo is located the middle part of installation cavity, if pit subsoil produces deformation in the extending direction of locating lever, then the locating lever atress can incline for the water polo rolls to the lower one side of topography, with the felting needle that is located the lower one end of topography, thereby wets the dry package of this end, makes the colour of drier in the dry package change. The color of dry package is looked over to staff accessible transparent observation window to judge the deformation condition of locating lever under hole subsoil, monitoring effect is good, directly perceived convenient.
Optionally, a mounting channel is formed in a cavity wall of the mounting cavity, the width of the mounting channel is larger than the diameter of the water ball, and the water ball can move into the mounting cavity from the mounting channel.
Through adopting above-mentioned technical scheme, after the locating rack was arranged in the foundation ditch bottom, can detect through equipment such as spirit level earlier and whether the locating lever is in the horizontality, with the water polo follow installation passageway and move into the installation cavity again to realize the installation of water polo, in order to avoid the water polo to be pricked because of improper operation before the monitoring. So set up, at the in-process that shifts monitoring alarm, the staff need not to keep locating lever level continuously, and the operation is more convenient.
Optionally, the bottom wall of the mounting channel is provided with an inclined guiding surface, and the height of the guiding surface gradually decreases from the opening of the mounting channel to the direction of the mounting cavity.
By adopting the technical scheme, the guide surface not only plays a role in guiding when the water ball moves into the installation cavity from the installation channel, so that the water ball is not easy to be blocked in the installation channel; the water ball can be prevented from moving out of the mounting cavity through the mounting channel when the water ball is subjected to acting force of pit bottom soil, and ordered work of the monitoring assembly can be guaranteed.
Optionally, the diapire of installation chamber is provided with waterproof ventilated membrane, a plurality of bleeder vents with installation chamber intercommunication are seted up to the bottom surface of locating lever.
Through adopting above-mentioned technical scheme, once monitor after finishing, can blow in hot-blast to the installation cavity through the bleeder vent to dry the dry package that originally was soaked, thereby recycle monitoring component. Waterproof ventilated membrane plays waterproof effect for the water of foundation ditch bottom is difficult for getting into the installation cavity through the bleeder vent in, helps guaranteeing the monitoring effect of monitoring component.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the pit bottom soil is raised, the monitoring rod is pushed upwards, so that the monitoring rod extrudes the clay, and the deformation condition of the pit bottom soil is transferred to the clay, so that measurement and observation are facilitated, and the monitoring efficiency is high;
2. the torsion spring is used for driving the wind-up roll to be kept in a state of tensioning the barrier film, so that the clay supporting effect of the barrier film is guaranteed; when the foundation pit deforms to enable clay to be abutted against the baffle, the sensor senses pressure and sends a signal to the alarm, so that the alarm works and reminds workers that the foundation pit is raised to reach a critical state;
3. when the pit bottom soil right below the positioning rod deforms and the positioning rod is inclined, the water ball rolls towards one side with lower topography and is punctured by the puncture needle positioned at one end with lower topography so as to wet adjacent dry bags, and workers can check the state of the dry bags through the transparent observation window, so that the deformation condition of the pit bottom soil along the length direction of the positioning rod is judged.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present application.
FIG. 2 is a partial schematic view of a connecting rod with a monitor rod in an embodiment of the present application.
Fig. 3 is an exploded view of a display assembly in an embodiment of the present application.
Fig. 4 is a schematic transverse cross-sectional view of a locating lever in an embodiment of the present application, primarily showing a monitoring assembly.
Fig. 5 is a schematic longitudinal cross-sectional view of a locating bar in an embodiment of the present application, primarily showing the guide surfaces.
Reference numerals illustrate:
1. a positioning frame; 11. a positioning rod; 111. a rod; 112. a mounting cavity; 113. a transparent viewing window; 114. a mounting channel; 115. a guide surface; 116. ventilation holes; 117. a waterproof breathable film; 12. a connecting rod; 121. a connection hole; 13. a portal frame; 131. a riser; 132. a cross plate; 133. lifting screw rods; 134. a hand wheel; 14. a guide seat; 141. a guide ring; 142. a support rod; 143. a guide hole; 144. a stop lever; 145. a stopper; 2. a monitoring rod; 21. a roller; 3. a display assembly; 31. a fixed net; 311. a fixing hole; 32. a barrier film; 33. clay; 4. a tension member; 41. a wind-up roll; 411. a roller section; 412. a roller portion; 42. a torsion spring; 5. a baffle; 51. a sensor; 52. an alarm; 6. a monitoring component; 61. a water ball; 62. a needle; 63. and (5) drying the bag.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-5.
The embodiment of the application discloses a deep foundation pit deformation monitoring alarm device. Referring to fig. 1, the deep foundation pit deformation monitoring alarm device comprises a positioning frame 1, a plurality of monitoring rods 2 vertically sliding and penetrating through the positioning frame 1, and a display assembly 3 arranged on the positioning frame 1, wherein the display assembly 3 is positioned right above the monitoring rods 2 and used for displaying the vertical displacement of the monitoring rods 2.
Referring to fig. 1, the positioning frame 1 includes two positioning rods 11 that are oppositely disposed, a plurality of connecting rods 12 that are fixedly disposed between the two positioning rods 11, and a set of gantry frames 13 that are fixedly disposed between the two positioning rods 11, where the two positioning rods 11 in this embodiment are disposed in parallel, and the connecting rods 12 are disposed in two. The lower part of each positioning rod 11 is fixed with a plug rod 111 at two ends, and one end of the plug rod 111 far away from the positioning rod 11 is a tip so as to be embedded into pit bottom soil of a foundation pit to be detected, thereby fixing the positioning frame 1 at the bottom of the foundation pit.
Referring to fig. 1 and 2, each connecting rod 12 is provided with a plurality of vertically extending connecting holes 121 for allowing the monitoring rod 2 to pass through the connecting rod 12 in the vertical direction. In this embodiment, the cross sections of the monitoring rod 2 and the connecting hole 121 are all circular, and the diameter of the monitoring rod 2 is slightly smaller than the aperture of the connecting hole 121, so that the monitoring rod 2 is not easy to move horizontally when penetrating through the connecting hole 121.
Referring to fig. 1 and 2, in order to further limit the moving direction of the monitor rod 2, guide seats 14 corresponding to the connecting holes 121 in one-to-one correspondence are provided above the connecting rod 12. The guide holder 14 includes a guide ring 141 located right above the connection hole 121 and a plurality of support rods 142 fixedly disposed between the guide ring 141 and the link 12, and the support rods 142 are obliquely disposed above the link 12 to support the guide ring 141.
Referring to fig. 1 and 2, a guide hole 143 located right above the connection hole 121 is formed in the middle of the guide ring 141, and the monitor rod 2 is eccentrically inserted into the guide hole 143 and is attached to the wall of the guide hole 143. The hole wall of the guide hole 143 is in threaded connection with a stop rod 144 at a position far away from the joint end of the monitoring rod 2, one end of the stop rod 144 extends out of the guide ring 141, the other end of the stop rod is rotatably provided with a stop block 145, and the side surface of the stop block 145, which is close to the central axis of the guide ring 141, is a concave cambered surface.
Referring to fig. 1 and 2, before transferring the monitoring alarm apparatus, the stop lever 144 may be rotated to a side close to the monitoring lever 2, so that the stop block 145 presses the monitoring lever 2, so as to prevent the monitoring lever 2 from moving out of the guide ring 141 and the connecting rod 12 during the transferring process, thereby improving the integrity of the apparatus. During monitoring operation, the stop rod 144 can be rotated to the side far away from the monitoring rod 2, so that the stop block 145 is attached to the side wall of the monitoring rod 2, and the stop block 145 does not generate pressure on the monitoring rod 2 at this time, plays a role in guiding, and is beneficial to controlling the moving direction of the monitoring rod 2.
Referring to fig. 2, in order to improve convenience in transferring the monitoring alarm, a roller 21 is connected to the bottom of each monitoring rod 2. When the foundation pit monitoring point is transferred, the monitoring rod 2 can be moved to a position where the roller 21 is lower than the inserted rod 111, and then the monitoring rod 2 is pressed by the stop block 145. At this time, the roller 21 will contact with the bottom soil of the foundation pit, so that the staff will move the monitoring and alarming device to other positions.
Referring to fig. 1 and 3, the portal frame 13 includes two opposite risers 131 and a cross plate 132 fixed between the two risers 131, and the two risers 131 are respectively fixed directly above the different positioning bars 11. The display assembly 3 comprises a fixed net 31, a baffle film 32 paved above the fixed net 31 and clay 33 paved above the baffle film 32, wherein the fixed net 31 is horizontally arranged and fixed between two vertical plates 131. The fixed net 31 comprises a plurality of criss-cross net wires, a plurality of fixed holes 311 are formed between each net wire, and the top ends of the monitoring rods 2 are respectively penetrated in the adjacent fixed holes 311 and are attached to the barrier film 32. During monitoring, the roller 21 at the bottom of the monitoring rod 2 is attached to pit bottom soil of a foundation pit to be monitored, the top end of the roller penetrates out of the fixing hole 311 and is attached to the baffle film 32, and when the foundation pit is raised, the pit bottom soil can push the monitoring rod 2 at a corresponding position upwards, so that the clay 33 is stressed to deform, and the deformation condition of the bottom of the foundation pit is reflected on the clay 33, so that a worker can intuitively check and calculate deformation.
Referring to fig. 1 and 3, in order to reduce the influence of the dead weight of the clay 33 on the monitoring accuracy, the clay 33 in the embodiment is made of the euclidean mud, and has the advantages of light weight, difficult dry cracking and good shaping effect.
Referring to fig. 1 and 3, in order to secure the supporting effect of the barrier film 32 on the clay 33, a tension member 4 for driving the barrier film 32 to be kept tensioned is provided on the gantry 13. The tensioning member 4 comprises two wind-up rollers 41 rotatably arranged on the portal frame 13 and torsion springs 42 respectively sleeved at two ends of the wind-up rollers 41, through holes are formed in opposite side surfaces of the two vertical plates 131, and the wind-up rollers 41 are rotatably arranged in the through holes. Specifically, the wind-up roll 41 includes a roll portion 411 and roll portions 412 integrally formed on both sides of the roll portion 411, wherein the barrier film 32 is wound around the roll portion 411 and one end is fixed to a circumferential side wall of the roll portion 411. The torsion spring 42 is sleeved outside the roller portion 412, and one end of the torsion spring 42 is fixed on the circumferential side wall of the wind-up roller 41, and the other end of the torsion spring 42 abuts against a groove on the riser 131 in a rotating fit with the roller portion 412.
Referring to fig. 1, in order to inform the worker in time when the deformation amount of the foundation pit reaches the preset critical value, a baffle 5 located right above the fixed net 31 is connected to the portal frame 13, a sensor 51 for detecting the stress condition of the bottom surface of the baffle 5 and an alarm 52 electrically connected to the sensor 51 are arranged on the baffle 5, the sensor 51 and the alarm 52 are both located in a gap formed by the baffle 5 and the transverse plate 132, and the sensor 51 is a pressure sensor 51. When the monitoring rod 2 moves to be abutted against the baffle plate 5 under the thrust action of pit bottom soil, the sensor 51 detects that the baffle plate 5 is subjected to pressure and sends out an electric signal, so that the alarm 52 is started, and the staff can take countermeasures conveniently in time.
Referring to fig. 1, a lifting screw 133 is screwed to the middle of the transverse plate 132, and a hand wheel 134 is fixed to the top end of the lifting screw 133 and a baffle 5 is fixed to the bottom end of the lifting screw 133. To limit the baffle 5 to rotate synchronously with the lifting screw 133, two opposite side walls of the baffle 5 are respectively attached to different risers 131 in this embodiment. Before monitoring, staff can drive the lifting screw 133 to rotate through the hand wheel 134 so as to drive the baffle 5 to vertically move, so that the initial height of the baffle 5 is changed, and the adjustment of a preset deformation critical value is realized.
Referring to fig. 4 and 5, in order to monitor deformation conditions of the bottom of the foundation pit along the length direction of the positioning rods 11, each positioning rod 11 is provided with a mounting cavity 112 extending along the length direction thereof, and a top wall of the mounting cavity 112 is provided with a transparent observation window 113 in a sealing manner, so that a worker can view the structure in the mounting cavity 112 outside.
Referring to fig. 4 and 5, a set of monitoring assemblies 6 is disposed in each of the mounting cavities 112, and the monitoring assemblies 6 include water balls 61, needles 62 disposed at both ends of the mounting cavities 112, and drying packs 63 disposed at both ends of the mounting cavities 112, and the needles 62 and the mounting packs are distributed along the length direction of the mounting cavities 112. The needles 62 are fixed at one end to the wall of the installation cavity 112 and extend obliquely toward the middle of the installation cavity 112 at the other end, and the needles 62 at both ends of the installation cavity 112 are located between the water ball 61 and the adjacent drying bag 63. The water balloon 61 in this embodiment is a balloon filled with water, and the interior of the drying bag 63 is filled with a cobalt-free allochromatic silica gel drying agent. When the positioning rod 11 inclines along the length direction of the positioning rod, the water ball 61 rolls along the bottom wall of the mounting cavity 112 to be punctured by the pricking needles 62 at the lower end of the terrain, and at the moment, water in the water ball 61 wets the adjacent drying bag 63 to enable the drying bag 63 to change color.
Referring to fig. 4 and 5, a horizontal cavity wall at one side of the installation cavity 112 is provided with an installation channel 114, and the installation channel 114 is communicated with the middle part of the installation cavity 112 and has an opening width larger than the diameter of the water ball 61, so that the water ball 61 can move into the installation cavity 112 from the installation channel 114. In order to increase the assembly efficiency of the water ball 61, an inclined guide surface 115 is provided on the bottom wall of the installation channel 114, and in the case of the positioning rod 11 being horizontally arranged, the height of the guide surface 115 gradually decreases from the opening of the installation channel 114 to the installation cavity 112.
Referring to fig. 4 and 5, in order to dry the previously wetted drying bag 63, a plurality of ventilation holes 116 communicating with the installation cavity 112 are formed in the bottom surface of the positioning rod 11 for blowing hot air into the installation cavity 112. In order to prevent water at the bottom of the foundation pit from entering the installation cavity 112 through the air holes 116, a waterproof and breathable film 117 is fixedly arranged on the bottom wall of the installation cavity 112 so as to prevent water from penetrating into the installation cavity 112 through the air holes 116 and ensure the monitoring effect.
The implementation principle of the deep foundation pit deformation monitoring alarm device is as follows: when the foundation pit uplift condition is monitored, the inserted link 111 is firstly embedded into pit bottom soil of the foundation pit to be detected, and then the stop block 145 is made to loosen the monitoring link 2, so that the roller 21 at the bottom of the monitoring link 2 is attached to the pit bottom soil, and the top end of the monitoring link is attached to the barrier film 32. Then, whether the positioning rod 11 is horizontal is detected by a level gauge or the like, and after the positioning rod 11 is kept horizontal, the water ball 61 is moved into the mounting cavity 112 through the mounting channel 114. If the foundation pit is raised in the monitoring process, the raised position of the pit bottom soil can lift up the monitoring rod 2 at the corresponding position, so that the monitoring rod 2 extrudes the clay 33 right above the monitoring rod, and the clay 33 forms a local bulge, thereby reflecting the raised state of the foundation pit on the clay 33 and facilitating observation.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. The utility model provides a deep basal pit deformation monitoring alarm device which characterized in that: the device comprises a positioning frame (1), a plurality of monitoring rods (2) vertically sliding and penetrating through the positioning frame (1) and a display assembly (3) arranged on the positioning frame (1) and used for displaying the vertical displacement of the monitoring rods (2), wherein the display assembly (3) comprises a fixed net (31) arranged on the positioning frame (1), a blocking film (32) paved on the fixed net (31) and clay (33) paved on the blocking film (32), a plurality of fixing holes (311) are formed between net wires of the fixed net (31), the bottom ends of the monitoring rods (2) are attached to pit bottom soil of a foundation pit, the top ends of the monitoring rods are attached to the blocking films (32) positioned under adjacent fixing holes (311), and the monitoring rods (2) can penetrate out from the adjacent fixing holes (311); the positioning frame (1) comprises two oppositely arranged positioning rods (11), a plurality of connecting rods (12) fixedly arranged between the two positioning rods (11) and a portal frame (13) fixedly arranged between the two positioning rods (11), the display assembly (3) is arranged on the portal frame (13), a plurality of connecting holes (121) for the monitoring rods (2) to penetrate out are formed in each connecting rod (12), a baffle (5) which is positioned right above the fixed network (31) and is adjustable in height is arranged on the portal frame (13), a sensor (51) for detecting the bottom stress condition of the baffle (5) is arranged on the baffle (5), and an alarm (52) is electrically connected to the sensor (51); the positioning rod (11) is internally provided with an installation cavity (112) extending along the length direction of the positioning rod, the installation cavity (112) is internally provided with a monitoring assembly (6), and the monitoring assembly (6) comprises a water ball (61) arranged in the installation cavity (112) in a sliding manner, needles (62) respectively arranged at two ends of the installation cavity (112) in the length direction and drying bags (63) respectively arranged at two ends of the installation cavity (112) in the length direction; the water ball (61) comprises a balloon with water inside, and the puncture needle (62) is positioned between the drying bag (63) and the water ball (61); the drying bag (63) is filled with a color-changing silica gel drying agent, and the positioning rod (11) is provided with a transparent observation window (113) for observing the color of the drying bag (63) in the mounting cavity (112).
2. The deep foundation pit deformation monitoring alarm device of claim 1, wherein: at least one inserted link (111) is arranged below the positioning link (11), and one end of the inserted link (111) far away from the positioning link (11) is a tip.
3. The deep foundation pit deformation monitoring alarm device of claim 2, wherein: be provided with on connecting rod (12) with connecting hole (121) guide holder (14) that quantity equals, guide holder (14) are including being located guide ring (141) and fixed a plurality of bracing pieces (142) that set up between guide ring (141) and connecting rod (12) directly over connecting hole (121), guide hole (143) that supply monitor rod (2) to wear out are seted up at the middle part of guide ring (141).
4. A deep foundation pit deformation monitoring alarm device according to claim 3, wherein: the side wall of the guide hole (143) is in threaded connection with a stop rod (144), one end of the stop rod (144) extending into the guide hole (143) is rotatably provided with a stop block (145), and the side surface of the stop block (145) close to the central axis of the guide ring (141) is a concave cambered surface.
5. The deep foundation pit deformation monitoring alarm device of claim 2, wherein: the novel winding device is characterized in that a tensioning piece (4) used for driving the barrier film (32) to keep a tensioning state is arranged on the portal frame (13), the tensioning piece (4) comprises two winding rollers (41) which are rotatably arranged on the portal frame (13) and torsion springs (42) which are sleeved on the outer sides of the winding rollers (41), two ends of the barrier film (32) are respectively wound on different winding rollers (41), and one end of each torsion spring (42) is fixed on the circumferential side wall of each winding roller (41) while the other end of each torsion spring is abutted on the portal frame (13).
6. The deep foundation pit deformation monitoring alarm device of claim 1, wherein: the wall of the installation cavity (112) is provided with an installation channel (114), the width of the installation channel (114) is larger than the diameter of the water ball (61), and the water ball (61) can move into the installation cavity (112) from the installation channel (114).
7. The deep foundation pit deformation monitoring alarm device of claim 6, wherein: the bottom wall of the mounting channel (114) is provided with an inclined guide surface (115), and the height of the guide surface (115) gradually decreases from the opening of the mounting channel (114) to the direction of the mounting cavity (112).
8. The deep foundation pit deformation monitoring alarm device of claim 6, wherein: the bottom wall of the installation cavity (112) is provided with a waterproof breathable film (117), and the bottom surface of the positioning rod (11) is provided with a plurality of ventilation holes (116) communicated with the installation cavity (112).
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