Building foundation pit horizontal displacement and settlement displacement monitoring device

Abstract

The utility model relates to the technical field of inclination measuring tools, in particular to a building foundation pit horizontal displacement and settlement displacement monitoring device. Comprising a detection section, the detection section comprises an inner pipe, an outer pipe arranged outside the inner pipe in a sleeving mode and a fiber grating sensor arranged between the inner pipe and the outer pipe, the two ends of the fiber grating sensor are connected with the inner pipe and the outer pipe at the same time, and the space between the inner pipe and the outer pipe is filled with reinforcing filler. According to the horizontal displacement and settlement displacement monitoring device for the building foundation pit, the pipe body is high in structural strength and not prone to being bent.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inclinometer tool, especially to a building foundation pit horizontal displacement and settlement displacement monitoring device. BACKGROUND

[0002] Inclinometer is a kind of in-situ measuring equipment used to measure the inclination and azimuth of borehole. Since the 1950s, it has been applied in the field of in-situ monitoring of geotechnical engineering such as hydraulic engineering earth and rockfill dam, high slope of highway and railway, soft soil subgrade and tunnel, to ensure the safety of geotechnical engineering design, construction and use. The main measuring components of inclinometer used at home and abroad at present are the combination of magnetic flux gate sensor or mechanical gyroscope as angular velocity sensor and accelerometer, to measure inclination and azimuth, and the measurement data transmission is mainly through armored seven-core cable.

[0003] The existing inclinometer on the market can refer to CN 204177381 U, named as a fiber grating inclinometer. The deficiency is that the existing inclinometer is easy to break when sliding in soil body, and has low strength. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a building foundation pit horizontal displacement and settlement displacement monitoring device with high strength.

[0005] In order to solve the above technical problem, the utility model adopts the technical scheme of providing a building foundation pit horizontal displacement and settlement displacement monitoring device, which comprises a detection segment, the detection segment comprises an inner tube, an outer tube sleeved outside the inner tube and a fiber grating sensor arranged between the inner tube and the outer tube, both ends of the fiber grating sensor are connected with the inner tube and the outer tube at the same time, and the inner tube and the outer tube are filled with reinforcing filler.

[0006] Further, the detection segment further comprises a fixing piece, the fixing piece is connected with the inner tube and the outer tube respectively, and the fixing piece is provided with a mounting port for mounting the fiber grating sensor.

[0007] Further, two or more fixing pieces are arranged uniformly along the circumference between the inner tube and the outer tube.

[0008] Further, two or more fiber grating sensors are arranged one by one corresponding to two or more fixing pieces.

[0009] Further, the detection segment further comprises a flange, one flange is connected with each end of the outer tube, and the flanges of adjacent two detection segments are connected with each other.

[0010] Further, the fiber grating sensor comprises a fiber grating and connecting joints arranged at both ends of the fiber grating, the fiber grating is fixed on the inner wall of the outer tube along the length direction of the outer tube, and the fiber grating sensors of adjacent two detection segments are connected through the connecting joints.

[0011] Further, the outer wall of the outer tube is provided with convex ridges.

[0012] Further, the control segment is further arranged, one end of the detection segment is connected with the control segment, the control segment is provided with a control chip, a display screen and a solar panel, and the control chip is connected with the fiber grating sensor, the display screen and the solar panel respectively.

[0013] Further, the positioning segment is further arranged, the positioning segment comprises a tapered outer tube and a tapered inner tube fixed in the tapered outer tube, the other end of the detection segment is connected with the tapered outer tube, the tapered outer tube and the tapered inner tube have a cavity for accommodating soil, and the outer wall of the tapered outer tube is provided with a soil inlet hole.

[0014] Further, the reinforcing filler is concrete.

[0015] The building foundation horizontal displacement and settlement displacement monitoring device has the advantages that: the inner tube and the outer tube are matched to fill the filler in the inside, so that the structural strength of the device is improved, the structure is simple, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the wood building foundation horizontal displacement and settlement displacement monitoring device.

[0017] Figure 2 It is an explosion schematic view of the building foundation horizontal displacement and settlement displacement monitoring device.

[0018] Figure 3 It is a detection segment schematic view of the building foundation horizontal displacement and settlement displacement monitoring device.

[0019] Figure 4 It is an explosion schematic view of the detection segment of the building foundation horizontal displacement and settlement displacement monitoring device.

[0020] Figure 5 It is the optical fiber grating sensor schematic view of the building foundation pit horizontal displacement and settlement displacement monitoring device of the utility model;

[0021] Figure 6 It is the control section schematic view of the building foundation pit horizontal displacement and settlement displacement monitoring device of the utility model;

[0022] Figure 7 It is the control section explosion schematic view of the building foundation pit horizontal displacement and settlement displacement monitoring device of the utility model;

[0023] Figure 8 It is the positioning section schematic view of the building foundation pit horizontal displacement and settlement displacement monitoring device of the utility model;

[0024] Figure 9 It is the positioning section explosion schematic view of the building foundation pit horizontal displacement and settlement displacement monitoring device of the utility model;

[0025] Label explanation:

[0026] 1, control section, 2, detection section, 3, positioning section, 11, control body, 12, solar panel, 13, display screen, 14, warning light, 15, control chip, 16, flange, 21, outer tube, 22, inner tube, 23, optical fiber grating sensor, 231, optical fiber grating, 232, connecting joint, 24, fixing piece, 31, conical outer tube, 32, conical inner tube. Specific implementation

[0027] To explain the technical content of the utility model, the purpose and effect realized in detail, the following will be explained by combining with the drawings.

[0028] Please refer to Figure 1 And Figure 9 Provide a kind of building foundation pit horizontal displacement and settlement displacement monitoring device, it is characterized in that: including detection section 2, the detection section 2 includes inner tube 22, outer tube 21 being set in inner tube 22 outer portion and the optical fiber grating sensor 23 being arranged between inner tube 22 and outer tube 21, both ends of the optical fiber grating sensor 23 are simultaneously connected with the inner tube 22 and the outer tube 21, and the inner tube 22 and the outer tube 21 are filled with reinforcing filler.

[0029] From the above description, a building foundation pit horizontal displacement and settlement displacement monitoring device, by the cooperation of the inner tube 22 and the outer tube 21, the filling material is filled in the inside, to improve the structural strength of the device, simple structure, low cost. Specifically, when in use, the staff selects a certain number of detection segments 2 according to the required length, and connects the optical fiber grating sensors 23 in the adjacent detection segments 2 while the detection segments 2 are spliced together. Finally, fill the reinforcing filler between the inner tube 22 and the outer tube 21. Due to the presence of the reinforcing filler, the structural strength of the detection segment 2 is strengthened, avoiding breakage when sliding in the soil and affecting detection. Moreover, the filling of the reinforcing filler can be carried out on site, which can reduce the weight of the detection segment 2, facilitate transportation, improve the work efficiency, and has strong practicality.

[0030] Further, the detection segment 2 further comprises a fixing piece 24, the fixing piece 24 is connected with the inner tube 22 and the outer tube 21 respectively, and the fixing piece 24 is provided with a mounting port for mounting the optical fiber grating sensor 23.

[0031] From the above description, the fixing piece 24 fixes the inner tube 22 at the center of the outer tube 21, ensures the uniformity of the gap between the inner tube 22 and the outer tube 21, and ensures the structural stability after filling the filler. At the same time, the mounting port can fix the optical fiber grating sensor 23, avoid displacement of the optical fiber grating sensor 23, and affect the detection result.

[0032] Further, two or more fixing pieces 24 are arranged uniformly in the circumferential direction between the inner tube 22 and the outer tube 21.

[0033] From the above description, the fixing piece 24 is arranged uniformly in the circumferential direction, avoiding uneven structural strength between the inner tube 22 and the outer tube 21. Avoiding deformation due to uneven stress during the detection stage after filling the filler.

[0034] Further, two or more optical fiber grating sensors 23 are provided one by one corresponding to two or more fixing pieces 24.

[0035] From the above description, the optical fiber grating sensor 23 is provided corresponding to the fixing piece 24, and the fixing piece 24 plays a fixed support role for the optical fiber grating sensor 23, improving the overall stability.

[0036] Further, the detection segment 2 further comprises a flange 16, and the two ends of the outer tube 21 are respectively connected with one flange 16, and the flanges 16 of the adjacent two detection segments 2 are connected with each other.

[0037] As can be seen from the above description, the inclinometer is an indispensable device for deep horizontal displacement monitoring, which is composed of a mud protection cover, a protective cover and a plurality of jointable inclinometer bodies. When installed, it is usually placed at the monitoring point, which requires it to be drilled through the ground or sunk after being bound in the steel cage. Since the monitoring point is often located at a position with a large structure burial depth, the inclinometer needs to be spliced by a plurality of tube bodies end to end, and the alignment of the two sets of grooves of each tube body needs to be ensured. However, the common inclinometer on the market is connected by a sleeve pipe and a bolt, which not only is complicated to install, but also is prone to falling off or misalignment of the grooves due to the weight of the tube body and collision in construction, thereby affecting the accuracy of the monitoring data. The flanges 16 of the two adjacent detection segments 2 are connected to each other, which facilitates installation and disassembly.

[0038] Further, the fiber grating sensor 23 comprises a fiber grating 231 and a connecting joint 232 arranged at both ends of the fiber grating 231, the fiber grating is fixed on the inner wall of the outer tube 21 along the length direction of the outer tube 21, and the fiber grating sensors 23 of the two adjacent detection segments 2 are connected through the connecting joint 232.

[0039] As can be seen from the above description, the fiber grating sensors 23 between the two adjacent detection segments 2 are connected through the connecting joint 232, which facilitates installation and disassembly.

[0040] Further, the outer wall of the outer tube is provided with convex ridges.

[0041] As can be seen from the above description, the outer wall of the outer tube is provided with convex ridges to strengthen the structural stability of the detection segment 2, and the pipe body is inserted into the soil more firmly.

[0042] Further, it further comprises a control segment 1, one end of the detection segment 2 is connected with the control segment 1, the control segment 1 is provided with a control chip 15, a display screen 13 and a solar panel 12, and the control chip 15 is connected with the fiber grating sensor 23, the display screen 13 and the solar panel 12 respectively.

[0043] As can be seen from the above description, the control chip 15 is connected with the fiber grating sensor 23, the display screen 13 and the solar panel 12 respectively. The fiber grating sensor 23 is used to measure the horizontal displacement and settlement displacement, and the display screen 13 is used to monitor and display in real time, and the control chip 15 is powered by the solar panel 12.

[0044] Further, it further comprises a positioning segment 3, the positioning segment 3 comprises a conical outer tube 31 and a conical inner tube 32 fixed in the conical outer tube 31, the other end of the detection segment 2 is connected with the conical outer tube 31, the conical outer tube 31 and the conical inner tube 32 have a cavity for accommodating soil, and the outer wall of the conical outer tube 31 is provided with a soil inlet hole.

[0045] As described above, the outer wall of the conical outer tube 31 has multiple soil entry holes, which facilitates soil penetration into the conical outer tube 31 when it is inserted into the soil, thereby increasing the overall stability of the device with the soil.

[0046] Furthermore, the reinforcing filler is concrete.

[0047] As described above, using concrete as the reinforcing filler can improve the strength of the device and is also cost-effective.

[0048] Please refer to Figures 1 to 9 Embodiment 1 of this utility model is as follows:

[0049] A device for monitoring the horizontal displacement and settlement displacement of a building foundation pit includes a control segment 1, several detection segments 2, and a positioning segment 3. The control segment 1 consists of a control body 11, a solar panel 12, a display screen 13, a warning light 14, a control chip 15, and a flange 16. The control body 11 and the flange 16 are welded together as a single unit. The detection segments 2 consist of an outer tube 21, an inner tube 22, four fiber optic sensors 23, several fasteners 24, and the flange 16. The outer and inner tubes are made of aluminum alloy, metal, or rubber. The positioning segment 3 consists of a tapered outer tube 31, a tapered inner tube 32, and the flange 16. The tapered outer tube 31, the tapered inner tube 32, and the flange 16 are welded together as a single unit.

[0050] The solar panel 12 is embedded in the upper part of the control body 11, forming a 45° angle with it. The display screen 13 shows the real-time settlement displacement of the horizontal displacement gauge at the monitoring point. The warning light 14 is located on the side of the control chip 15, and the warning flashing is controlled by the control chip 15. The control chip 15 is powered by the solar panel 12. Each detection segment 2 is connected into a whole by bolts and flanges 16. The outer tube and the inner tube are connected into a whole by the fastener 24. The flange 16 is welded to the outer tube into a whole. The fastener 24 is made of a circular metal and two strip-shaped metal welded together. The fiber optic grating sensor 23 consists of a fiber optic grating and a connecting connector 232, arranged in four equal parts within the detection segment 2. Each fiber optic grating sensor 23 is fixed to each detection segment 2 by the fastener 24. The fiber optic grating sensors 23 in each detection segment 2 are connected into a whole by the connecting connector 232. The outer wall of the outer tube has eight protrusions to facilitate a more secure insertion of the tube into the soil. The outer wall of the conical outer tube 31 has multiple soil entry holes, which facilitates soil penetration into the conical outer tube 31 when inserted into the soil, increasing the stability of the monitoring device in the soil. Concrete is poured between the outer and inner tubes of the detection segment 2 to ensure the structural rigidity of the detection equipment.

[0051] Specific implementation process: first according to the foundation pit project to determine how many monitoring points need to be arranged, and according to the engineering data to determine the depth of each monitoring point. After the point and depth are determined, the positioning section 3 and the first detection section 2 are butt-jointed by the flange 16 on the ground, and then the detection section 2 is connected by the flange 16 according to the depth of the monitoring point. When connecting the flange 16 of the detection section 2, the adjacent detection section 2 is connected by the connecting joint 232 at the same time. After the connection of the detection section 2 is completed, the positioning section 3 is connected.

[0052] Each detection section 2 has four fiber grating sensors 23 at equal positions, and the corresponding fiber grating sensors 23 will deform with the deformation of the foundation pit soil. The signal displayed by the fiber grating sensor 23 is the strain value, and the strain value multiplied by the length of the fiber grating sensor 23 can calculate the deformation value of each detection section 2. The sum of the sine function values of the deformation calculated by each fiber grating sensor 23 is the horizontal deformation of the monitoring point, and the sum of the cosine function values is the settlement deformation of the monitoring point. Real-time data will be displayed on the display screen 13. The control chip 15 has preset the allowable horizontal displacement and settlement deformation value of the monitoring point. Once the critical point is reached, the control chip 15 will issue a warning flash and an alarm sound through the warning light 14.

[0053] The current inclinometer monitoring relies on on-site operation of technical personnel, and the monitoring accuracy is easily affected by weather and personnel state, so it is difficult to ensure the correctness of the deformation data. Therefore, improving the connection design of the inclinometer, improving the installation convenience and data reliability, and exploring a more intelligent monitoring method are crucial to improve the efficiency and accuracy of deep horizontal displacement monitoring. The building foundation pit horizontal displacement and settlement displacement monitoring device provided by the embodiment has simple structure installation, can realize unmanned monitoring, and has high monitoring data precision. In summary, a building foundation pit horizontal displacement and settlement displacement monitoring device improves the structural strength of the device by filling the filler in the inner pipe and the outer pipe. The specific method is that the worker selects a certain number of detection segments according to the required length during use, and connects the optical fiber grating sensors in the adjacent detection segments while splicing the detection segments together. Finally, the inner pipe and the outer pipe are filled with a reinforcing filler. Due to the presence of the reinforcing filler, the structural strength of the detection segment is strengthened, and the detection is not affected by the breakage when the soil slides. Moreover, the reinforcing filler can be filled on site, which can reduce the weight of the detection segment, facilitate transportation, improve the work efficiency, and has high practicability. Further, the fixing member fixes the inner pipe at the center of the outer pipe, ensures the uniformity of the gap between the inner pipe and the outer pipe, and ensures the structural stability after filling the filler later. Meanwhile, the installation port is arranged, so that the optical fiber grating sensor can be fixed, the displacement of the optical fiber grating sensor is avoided, and the detection result is affected. Further, the fixing members are arranged uniformly in the circumferential direction, so that the structural strength between the inner pipe and the outer pipe is uniform. The deformation caused by uneven stress during the detection stage after filling the filler later is avoided. Further, the optical fiber grating sensor is correspondingly arranged with the fixing member, the fixing member plays a fixing and supporting role on the optical fiber grating sensor, and the overall stability is improved. Further, the flanges of the two adjacent detection segments are connected with each other, so that the installation and disassembly are facilitated. Further, the optical fiber grating sensors between the two adjacent detection segments are connected through the connecting joint, so that the installation and disassembly are facilitated. Further, the outer wall of the outer pipe is provided with convex ribs to strengthen the structural stability of the detection segment, and the pipe body is inserted into the soil more firmly. Further, the control chip is connected with the optical fiber grating sensor, the display screen and the solar panel. The horizontal displacement and the settlement displacement are measured by using the optical fiber grating sensor, and the display screen is used for real-time monitoring and display. The control chip is powered by the solar panel. Further, the outer wall of the conical outer pipe has multiple soil insertion holes, so that when the device is inserted into the soil, the soil penetrates into the conical outer pipe, and the firmness of the device and the soil is increased. Further, the reinforcing filler is concrete, which can improve the strength of the device and has low cost.

[0054] The above description is only an embodiment of the present application, and does not limit the patent range of the present application. Any equivalent transformation or direct or indirect application in related technical fields based on the content of the present application is also included in the patent protection range of the present application.

Claims

1. A device for monitoring the horizontal displacement and settlement displacement of a building foundation pit, characterized in that: The detection section comprises an inner tube, an outer tube sleeved outside the inner tube, and a fiber grating sensor arranged between the inner tube and the outer tube, both ends of the fiber grating sensor being connected with the inner tube and the outer tube at the same time, and the inner tube and the outer tube being filled with reinforcing filler.

2. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 1, characterized in that: The detection section further comprises a fixing member connected with the inner tube and the outer tube respectively, and the fixing member is provided with a mounting port for mounting the fiber grating sensor.

3. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 2, characterized in that: Two or more fixing members are uniformly arranged between the inner tube and the outer tube in the circumferential direction.

4. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 3, characterized in that: Two or more fiber grating sensors are arranged one by one with two or more fixing members.

5. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 1, characterized in that: The detection section further comprises a flange, and each end of the outer tube is connected with one flange, and the flanges of adjacent two detection sections are connected with each other.

6. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 1, characterized in that: The fiber grating sensor comprises a fiber grating and a connecting joint arranged at both ends of the fiber grating, the fiber grating is fixed on the inner wall of the outer tube along the length direction of the outer tube, and the fiber grating sensors of adjacent two detection sections are connected through the connecting joints.

7. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 1, characterized in that: The outer wall of the outer tube is provided with convex ribs.

8. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 1, characterized in that: The detection section is further connected with a control section, the control section is provided with a control chip, a display screen and a solar panel, and the control chip is connected with the fiber grating sensor, the display screen and the solar panel respectively.

9. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 1, characterized in that: The detection section is further connected with a positioning section, the positioning section comprises a tapered outer tube and a tapered inner tube fixed inside the tapered outer tube, the other end of the detection section is connected with the tapered outer tube, the tapered outer tube and the tapered inner tube have a cavity for accommodating soil, and the outer wall of the tapered outer tube is provided with a soil entering hole.

10. The building foundation horizontal displacement and settlement displacement monitoring device according to claim 1, characterized in that: The reinforcing filler is concrete.

Images