Deformation detection device for deep foundation pit support

Abstract

The utility model relates to a deep foundation pit support deformation detection device, which is characterized in that a support structure is arranged on a top beam, the support structure comprises a plurality of support piles, one end of each support pile far away from the bottom of a foundation pit is provided with a vertical fixing rod, and the vertical fixing rod is provided with a warning structure for prompting the deformation of the deep foundation pit in a matched manner; the induction ring of the device is made of steel, the inner diameter of the induction ring is larger than the diameter of the vertical fixing rod, the induction ring does not make contact with the vertical fixing rod in a normal state, and when the deep foundation pit deforms, if the displacement of the supporting pile exceeds a designed early warning value, the induction ring communicates with the vertical fixing rod, and the vertical fixing rod is not in contact with the induction ring. The vertical fixing rod, the induction ring, the transverse fixing rod and the first wire form a part of a passage, the transverse fixing rod and the vertical fixing rod are connected through the third wire, at the moment, the passage is formed, after the passage is communicated, it is represented that deformation of the deep foundation pit reaches a set value, and the alarm gives out a sound for prompting. And the vertical fixing rod and the induction ring are equivalent to switches of the access.

Description

Technical Field

[0001] This utility model relates to the field of engineering foundation pit detection, specifically to a deep foundation pit support deformation detection device. Background Technology

[0002] Foundation pit engineering involves excavating an underground space from the ground down to a depth exceeding 5 meters (including 5 meters), or, although the depth may not exceed 5 meters, projects with particularly complex geological conditions, surrounding environment, and underground pipelines. Foundation pit engineering mainly includes the design and construction of the foundation pit support system and earthwork excavation; it is a highly comprehensive and systematic project requiring close cooperation between geotechnical and structural engineering technicians. The foundation pit support system is a temporary structure and is no longer needed after the underground engineering construction is completed. However, the support system is particularly important during underground engineering construction, as it is closely related to the personal safety of workers. For deep foundation pits, as underground engineering projects and support systems affected by groundwater, foundation pit deformation monitoring is especially important, and foundation pit tilt monitoring is an essential test.

[0003] In existing technologies, tilt monitoring should measure the horizontal displacement and height difference between the top and bottom of the monitored object, and record the tilt angle, tilt direction, and tilt rate. Crack monitoring includes the location, direction, length, width, and degree of change of cracks; major or significantly changing cracks should be monitored. Monitoring the internal forces of the support structure can be done by installing strain gauges or stress gauges inside or on the surface of the structure. This requires numerous measurements, is very labor-intensive and time-consuming, and poses a danger to the personnel during the inspection. Utility Model Content

[0004] To address the aforementioned technical problems, this invention provides a deep foundation pit support deformation detection device that can replace manual detection by using a sensing rod in conjunction with a vertical fixed rod, thereby solving the problems existing in the prior art.

[0005] The technical solution adopted by this utility model is a deep foundation pit support deformation detection device, which includes a support structure installed at the bottom of the deep foundation pit. The support structure is installed on the capping beam. The support structure includes support piles, and multiple support piles are provided. A vertical fixing rod is installed at the end of the support pile away from the bottom of the foundation pit. A warning structure for indicating the deformation of the deep foundation pit is installed on the vertical fixing rod.

[0006] Furthermore, the warning structure includes a horizontal fixing rod, and multiple horizontal fixing rods are provided. One end of the horizontal fixing rod is fixedly installed on the side wall of the pit. The side of the horizontal fixing rod closest to the side wall of the pit is connected by a first wire. The end of the horizontal fixing rod away from the side wall of the pit is equipped with a sensing ring, which is fitted onto the vertical fixing rod.

[0007] Furthermore, the vertical fixing rod is connected via a second wire.

[0008] Furthermore, the horizontal fixing rod and the vertical fixing rod are connected by a third wire.

[0009] Furthermore, a power source is provided on the third conductor.

[0010] Furthermore, an alarm is installed on the third conductor.

[0011] The beneficial effects of this utility model are:

[0012] The sensing ring of this device is made of steel. The inner diameter of the sensing ring is larger than the diameter of the vertical fixing rod. Under normal circumstances, the sensing ring is not in contact with the vertical fixing rod. When the deep foundation pit deforms, if the displacement of the support pile exceeds the design warning value, the sensing ring connects with the vertical fixing rod, so that the vertical fixing rod, the sensing ring, the horizontal fixing rod and the first wire form part of the passage. The horizontal fixing rod and the vertical fixing rod are connected by a third wire. At this time, a passage is formed. After the passage is connected, it means that the deep foundation pit deformation has reached the set value, and the alarm will sound to remind the user. The vertical fixing rod and the sensing ring are equivalent to the switch of this passage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the deep foundation pit support deformation detection device described in this utility model;

[0014] Figure 2 This is a schematic diagram of the support structure and warning structure of the deep foundation pit support deformation detection device described in this utility model;

[0015] In the diagram: 1. Pit sidewall; 2. Support structure; 21. Support pile; 22. Vertical fixing rod; 23. Second conductor; 3. Crown beam; 4. Warning structure; 41. Sensing ring; 42. Horizontal fixing rod; 43. First conductor; 44. Third conductor; 45. Alarm; 46. Power supply. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] To make the technical means, creative features, objectives, and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the scope of protection of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0018] This embodiment discloses a deep foundation pit support deformation detection device, combined with... Figure 1 and Figure 2 As shown, a deep foundation pit support deformation detection device includes a support structure 2 installed at the bottom of the deep foundation pit. The support structure 2 is installed on a capping beam 3. The support structure 2 includes support piles 21, and multiple support piles 21 are provided. Multiple support structures 2 are fixedly installed on the capping beam 3 by welding. According to actual operation, the interval between adjacent support piles 21 is 10-20 meters. A vertical fixing rod 22 is installed at the end of the support pile 21 away from the bottom of the foundation pit. The vertical fixing rod 22 is made of steel bars and passes through the capping beam 3 and is fixedly connected to the pile head of the support pile 21. A warning structure 4 for indicating deep foundation pit deformation is installed on the vertical fixing rod 22.

[0019] The warning structure 4 includes a horizontal fixing rod 42, which is perpendicular to the vertical fixing rod 22. The horizontal fixing rod 42 is a conductor. In this application, the horizontal fixing rod 42 is made of steel bars. Multiple horizontal fixing rods 42 are provided. One end of the horizontal fixing rod 42 is fixedly installed on the side wall 1 of the pit. The horizontal fixing rod 42 is fixedly installed on the side wall 1 of the pit by pre-embedding or riveting. The side of the horizontal fixing rod 42 closest to the side wall 1 of the pit is connected by a first wire 43. The end of the horizontal fixing rod 42 away from the side wall 1 of the pit is equipped with a sensing ring 41. The sensing ring 41 is fitted onto the vertical fixed rod 22. The sensing ring 41 is the same as the horizontal fixed rod 42, and its material must be a conductor. In this application, the material of the sensing ring 41 is steel. The inner diameter of the sensing ring 41 is larger than the diameter of the vertical fixed rod 22. Under normal conditions, the sensing ring 41 does not contact the vertical fixed rod 22. When the deep foundation pit deforms, if the displacement of the support pile 21 exceeds the design warning value (the distance between the vertical fixed rod 22 and the sensing ring 41), the sensing ring 41 connects with the vertical fixed rod 22, so that the vertical fixed rod 22, the sensing ring 41, the horizontal fixed rod 42 and the first conductor 43 form part of the passage.

[0020] The vertical fixing rods 22 are connected by the second conductor 23. Since the adjacent support piles 21 are far apart, when local deformation occurs in the deep foundation pit, one or more vertical fixing rods 22 will come into contact with the sensing ring 41, thereby ensuring accurate detection.

[0021] The horizontal fixing rod 42 and the vertical fixing rod 22 are connected by a third wire 44, thus forming a circuit. The vertical fixing rod 22 and the sensing ring 41 are equivalent to the switch of this circuit.

[0022] A power source 46 is provided on the third conductor 44. The power source 46 is preferably a storage battery, which provides power to the circuit. To solve the problem of inconvenient battery charging, the storage battery is connected to a solar charging panel, which facilitates battery charging.

[0023] An alarm 45 is installed on the third conductor 44. The alarm 45 is a buzzer. A buzzer is an integrated electronic sounder that is powered by DC voltage and is widely used in electronic products such as computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, and timers as a sound-generating device. Buzzers are mainly divided into two types: piezoelectric buzzers and electromagnetic buzzers. In this application, an electromagnetic buzzer is selected. An electromagnetic buzzer consists of an oscillator, an electromagnetic coil, a magnet, a diaphragm, and a housing. After the power is turned on, the audio signal current generated by the oscillator passes through the electromagnetic coil, causing the electromagnetic coil to generate a magnetic field. The diaphragm vibrates periodically to produce sound under the interaction of the electromagnetic coil and the magnet.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A deep foundation pit support deformation detection device, comprising a support structure (2) installed at the bottom of the deep foundation pit, characterized in that: The support structure (2) is installed on the cap beam (3). The support structure (2) includes support piles (21). Multiple support piles (21) are provided. A vertical fixing rod (22) is installed at one end of the support pile (21) away from the bottom of the foundation pit. A warning structure (4) for indicating the deformation of the deep foundation pit is installed on the vertical fixing rod (22).

2. The deep foundation pit support deformation detection device according to claim 1, characterized in that: The warning structure (4) includes a horizontal fixing rod (42), and multiple horizontal fixing rods (42) are provided. One end of the horizontal fixing rod (42) is fixedly installed on the side wall (1) of the pit. The side of the horizontal fixing rod (42) close to the side wall (1) of the pit is connected by a first wire (43). The end of the horizontal fixing rod (42) away from the side wall (1) of the pit is equipped with a sensing ring (41). The sensing ring (41) is fitted on the vertical fixing rod (22).

3. The deep foundation pit support deformation detection device according to claim 2, characterized in that: The vertical fixing rod (22) is connected by a second conductor (23).

4. The deep foundation pit support deformation detection device according to claim 3, characterized in that: The horizontal fixing rod (42) and the vertical fixing rod (22) are connected by a third conductor (44).

5. The deep foundation pit support deformation detection device according to claim 4, characterized in that: A power supply (46) is provided on the third conductor (44).

6. The deep foundation pit support deformation detection device according to claim 4, characterized in that: An alarm (45) is installed on the third conductor (44).

Images