Intelligent monitoring device for horizontal displacement of foundation pit

Abstract

The utility model discloses an intelligent monitoring device for the horizontal displacement of a foundation pit, which comprises a top beam, a supporting pile and a horizontal displacement sensor, the horizontal inner support is connected with the inner side of the top beam, and the horizontal inner support, the top beam and the support pile form a foundation pit support system; the multiple prism devices are arranged on the upper surface of the top beam and are arranged along the center line of the top beam at equal intervals; the measuring table is vertically arranged on the ground on the outer side of the crown beam, the total station is installed at the top of the measuring table, the center of the top of the measuring table is aligned with the center of the total station, the total station can rotate by 360 degrees, and the total station and the prism device form a foundation pit horizontal displacement measuring light path; and a data processing center is arranged in the distribution box. The device is simple in structure and easy and convenient to operate, a foundation pit horizontal displacement measuring light path can be formed by rotating the angle of the total station and a plurality of prism devices on the center line of the crown beam one by one, so that the horizontal displacement of the center line of the crown beam of the foundation pit is calculated, and intelligent and accurate monitoring of the horizontal displacement of the foundation pit is achieved.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit monitoring technology, specifically to an intelligent monitoring device for horizontal displacement of foundation pits. Background Technology

[0002] When constructing deep foundation pits in areas with complex geological conditions and surrounding environments, foundation pit engineering adopts economical and reasonable support methods based on the safety level and environmental classification of the foundation pit. These methods include: retaining piles + concrete internal bracing, retaining piles + anchor cables, SMW (Surface Mount Welded) piles, sheet piles + steel supports, double-row pile support, etc. To effectively control foundation pit deformation and ensure the safe construction of the underground main structure during the foundation pit stage, it is necessary not only to strictly control the construction quality of the support structure but also to conduct comprehensive and full-cycle monitoring of the foundation pit. Foundation pit monitoring is a crucial part of foundation pit engineering, playing a significant role in ensuring foundation pit safety, establishing relevant foundation pit early warning and feedback mechanisms, providing data support for subsequent engineering design, and improving resource utilization efficiency.

[0003] In the support system of retaining piles and concrete internal bracing, the horizontal displacement monitoring of the foundation pit is also an important parameter for foundation pit deformation. During the foundation pit excavation stage → the layer-by-layer dismantling stage of the underground main structure construction → the foundation pit backfilling stage, the horizontal displacement of the foundation pit can be monitored in real time, accurately and effectively, and the horizontal displacement monitoring data can be transmitted in a timely manner. This is very important for judging whether the foundation pit deformation has reached the warning value. This places certain requirements on the monitoring accuracy, monitoring data processing and real-time transmission of the foundation pit horizontal displacement, so as to prevent irreparable losses caused by the failure to take effective measures when the foundation pit has large deformation due to the delay in data processing and transmission. Utility Model Content

[0004] The purpose of this invention is to provide an intelligent monitoring device for horizontal displacement of foundation pits to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides an intelligent monitoring device for horizontal displacement of a foundation pit, comprising: a capping beam, the bottom of which is connected to the top of the support piles, and the top of the capping beam being flush with the ground; a horizontal inner support, which is connected to the inner side of the capping beam and forms a foundation pit support system with the capping beam and the support piles; a prism device, multiple prism devices are arranged on the upper surface of the capping beam at equal intervals along the centerline of the capping beam; a measuring platform, which is vertically set on the ground outside the capping beam, and a total station is installed on the top of the measuring platform, with the center of the top of the measuring platform aligned with the center of the total station, the total station being able to rotate 360 ​​degrees, and forming an optical path for measuring the horizontal displacement of the foundation pit with the prism devices; and a power distribution box, which contains a data processing center connected to the total station via a signal line.

[0006] In a preferred embodiment, the prism device includes a prism sheet and a prism rod, the lower part of which extends into the crown beam, the upper part of which is connected to the prism sheet, and the center lines of the prism sheets at the top of the multiple prism devices are located at the same elevation.

[0007] In a preferred embodiment, the distribution box has a through hole on the side facing the measuring platform. One end of the signal line is connected to the total station, and the other end is connected to the data processing center through the through hole in the side wall of the distribution box.

[0008] In a preferred embodiment, the distribution box has a rectangular structure, with its bottom located on top of the precast concrete block. A power supply is installed inside the distribution box, and the data processing center and the power supply are connected via a power connection line.

[0009] In a preferred embodiment, multiple prism devices are symmetrically arranged on both sides of the center of the total station.

[0010] In a preferred embodiment, the measuring platform is a cylindrical or square column structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The device of this invention has a simple structure and is easy to operate. After the power is turned on and the device is connected, by rotating the angle of the total station, it can form an optical path for measuring the horizontal displacement of the foundation pit with multiple prism devices along the center line of the capping beam, thereby calculating the magnitude of the horizontal displacement of the foundation pit's capping beam center line. The data measurement system is reliable, effectively ensuring the authenticity and completeness of the foundation pit's horizontal displacement measurement data. At the same time, this intelligent monitoring device eliminates the need for monitoring personnel to manually measure at the construction site, achieving intelligent and precise monitoring of the foundation pit's horizontal displacement, greatly saving manpower, material resources, and subsequent maintenance costs, and meeting the requirements of green and sustainable development. Attached Figure Description

[0013] Figure 1 This is a structural cross-sectional view of the intelligent monitoring system for horizontal displacement of the foundation pit in this utility model;

[0014] Figure 2 This is a top view of the intelligent monitoring system for horizontal displacement of the foundation pit in this utility model;

[0015] Figure 3 This is a schematic diagram of the prism device structure in this utility model;

[0016] Figure 4 This is a block diagram of the internal structure of the data processing center in this utility model.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1-Cover beam, 2-Support pile, 3-Horizontal internal support, 4-Prism device, 5-Measuring platform, 6-Total station, 7-Signal line, 8-Distribution box, 9-Through hole, 10-Precast concrete block, 11-Data processing center, 12-Power connection line, 13-Power supply. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Example 1

[0021] like Figures 1 to 4 As shown, the preferred embodiment of this utility model includes a capping beam 1, support piles 2, horizontal inner supports 3, prism devices 4, a measuring platform 5, a total station 6, a power distribution box 8, and a data processing center 11. The bottom of the capping beam 1 is connected to the top of the support piles 2, and the top of the capping beam 1 is flush with the ground. The horizontal inner supports 3 are connected to the inner side of the capping beam 1 and together with the capping beam 1 and the support piles 2, form a foundation pit support system. Multiple prism devices 4 are arranged on the upper surface of the capping beam 1 at equal intervals along the center line of the capping beam 1. Each prism device 4 includes a prism sheet 41 and a prism rod 42. The upper part of the prism rod 42 is connected to the prism sheet 41, and the lower part of the prism rod 42 extends into the capping beam 1 for a certain length, so that the center lines of the prism sheets 41 at the top of the multiple prism devices 4 are at the same elevation. The multiple prism devices 4 are symmetrically arranged on both sides of the center of the total station 6.

[0022] The measuring platform 5 is vertically set on the ground outside the cap beam 1. The measuring platform 5 is a cylindrical or square column structure. A total station 6 is installed on the top of the measuring platform 5. The center of the top of the measuring platform 5 is aligned with the center of the total station 6. The total station 6 can rotate 360 ​​degrees and forms an optical path for measuring the horizontal displacement of the foundation pit with the prism device 4. The power distribution box 8 is equipped with a data processing center 11. The data processing center 11 is connected to the total station 6 through the signal line 7 and can transmit the original coordinate data measured by the total station 6 to the data processing center 11.

[0023] The distribution box 8 is a rectangular structure, with its bottom located on top of the precast concrete block 10. A power supply 13 is installed inside the distribution box 8, and the data processing center 11 is connected to the power supply 13 via a power connection cable 12. The distribution box 8 protects the data processing center 11 and the power supply 13 from external weather interference. A through-hole 9 is provided on the side of the distribution box 8 facing the measuring platform 5. One end of the signal cable 7 is connected to the total station 6, and the other end is connected to the data processing center 11 through the through-hole 9 on the side wall of the distribution box 8.

[0024] The data processing center 11 integrates a central processing unit (CPU), a data storage module, a data processing module, a wireless transmission module, and a displacement early warning module. The CPU is electrically connected to each of these modules, enabling data linkage processing among them. The data storage module stores the raw coordinate data measured by the total station 6. The data processing module calculates the raw coordinate data and converts it into horizontal displacement data. The wireless transmission module connects wirelessly to the foundation pit monitoring platform, allowing it to upload the raw coordinate data and horizontal displacement data to the platform in real time. The displacement early warning module has a pre-set horizontal displacement warning value set by the CPU. When the horizontal displacement data calculated by the data processing module exceeds the pre-set warning value, the module triggers an alarm to alert staff for emergency handling.

[0025] Example 2

[0026] The working principle of this utility model is described below:

[0027] Before the concrete of the capping beam 1 and the horizontal inner support 3 is initially set, the center line of the capping beam 1 is first marked on the upper surface of the capping beam 1 with an ink line. Measurements are then taken along the center line of the capping beam 1 using a measuring ruler, and cross-shaped markings are applied to mark the horizontal displacement measurement points of the foundation pit. Next, the bottoms of the prism rods 42 of multiple prism devices 4 are aligned with the respective horizontal displacement measurement marking points of the foundation pit and vertically inserted, extending a certain length into the capping beam 1. This ensures that the center lines of the prism pieces 41 at the top of each prism device 4 are at the same elevation. The center of the total station 6 is then aligned with the center of the top of the measuring platform 5. Next, the intelligent monitoring system for the horizontal displacement of the foundation pit is connected. One end of the signal line 7 is connected to the total station 6, and the other end is connected to the data processing center 11 through the through-hole 9 on the side wall of the distribution box 8. The power connection line 12 connects the data processing center 11 and the power supply 13.

[0028] After powering on 13 and connecting the intelligent monitoring device for horizontal displacement of the foundation pit, the device forms a horizontal displacement measurement optical path for the foundation pit by rotating the total station 6 and connecting it with multiple prism devices 4 along the center line of the cap beam 1. The magnitude of the horizontal displacement of the center line of the cap beam can then be calculated.

[0029] The calculation process for the horizontal displacement of the crown beam centerline is as follows: Multiple prism devices 4 are located on the centerline of crown beam 1, and the horizontal displacement of the crown beam 1 centerline is the horizontal displacement of the center points of the multiple prism devices 4. For the nth prism, after the centerline of crown beam 1 is installed, the total station 6 and the nth prism form a measuring optical path to measure the initial coordinates of the nth prism. During the excavation phase of the foundation pit, the point was monitored periodically, and the x and y coordinates (x, y, y) of several sets of the nth prism were measured. n1 ,yn1 ), (x n2 ,y n2 ), (x n3 ,y n3 ..., then the formula for calculating the absolute displacement of the nth prism is: in, The data are denoted as the absolute displacements of the foundation pit at different excavation stages as measured by the nth prism. The absolute displacements of the foundation pit at different excavation stages as measured by the nth prism are defined as follows. The horizontal angle formed with the center line of the cap beam is The formula for calculating the horizontal displacement of the foundation pit at different excavation stages measured by the nth prism is: The horizontal displacement of the foundation pit was measured by using a total station in groups of 6 to measure the horizontal coordinates, ordinates, absolute displacements, and horizontal angles between each prism in the multiple prism devices (4) and the centerline of the capping beam. During the construction phase of the foundation pit project, horizontal displacement monitoring was conducted at a certain frequency, referring to the "Technical Standard for Monitoring of Building Foundation Pit Engineering" GB50497-2019, local regulations, and relevant laws and regulations.

[0030] This invention is easy to operate, has a reliable data measurement system, and can upload raw coordinate data and horizontal displacement data to the foundation pit monitoring platform in real time, effectively ensuring the authenticity and completeness of the foundation pit horizontal displacement measurement data. Simultaneously, the device establishes an early warning mechanism and eliminates the need for monitoring personnel to manually measure at the construction site, achieving intelligent monitoring of foundation pit horizontal displacement. This significantly saves manpower, material resources, and subsequent maintenance costs, meeting the requirements of green and sustainable development.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foundation pit horizontal displacement intelligent monitoring device, characterized in that: The utility model relates to a kind of horizontal displacement measuring device for foundation pit, including: Corona beam (1), the bottom of the corona beam (1) is connected with the top of support pile (2), and the top of corona beam (1) is flush with ground; Horizontal inner support (3), the horizontal inner support (3) is connected with the inside of corona beam (1), and with the corona beam (1) and support pile (2) form foundation pit support system; Prism device (4), a plurality of the prism device (4) are arranged on the upper surface of corona beam (1), and are equidistantly arranged along the center line of corona beam (1); Measuring table (5), the measuring table (5) is vertically arranged on the ground outside corona beam (1), total station (6) is installed on the top of measuring table (5), the top center of measuring table (5) is aligned with the center of total station (6), the total station (6) can rotate 360 degrees, and with prism device (4) form foundation pit horizontal displacement measuring light path; Distribution box (8), data processing center (11) is arranged in the distribution box (8), and the data processing center (11) is connected with the total station (6) by signal line (7).

2. The foundation horizontal displacement intelligent monitoring device according to claim 1, characterized in that: The prism device (4) includes prism sheet (41) and prism rod (42), the lower part of the prism rod (42) extends into corona beam (1), the upper part of the prism rod (42) is connected with the prism sheet (41), and the center line of the prism sheet (41) of the top of a plurality of prism devices (4) is at the same elevation.

3. The foundation horizontal displacement intelligent monitoring device according to claim 2, characterized in that: The side of the distribution box (8) towards measuring table (5) is provided with through hole (9), one end of signal line (7) is connected with the total station (6), and the other end is connected with data processing center (11) through the through hole (9) of the side wall of distribution box (8).

4. The foundation horizontal displacement intelligent monitoring device according to claim 1, characterized in that: The distribution box (8) is cuboid structure, the bottom of the distribution box (8) is located on the top of concrete precast block (10), power supply (13) is arranged in the distribution box (8), and the data processing center (11) and power supply (13) are connected by power connection line (12).

5. The foundation horizontal displacement intelligent monitoring device according to claim 1, characterized in that: A plurality of the prism device (4) are symmetrically arranged on both sides of the center of total station (6).

6. The foundation horizontal displacement intelligent monitoring device according to claim 1, characterized in that: The measuring table (5) is cylindrical or square column structure.

Images