A multi-sensor cooperative layout system for dynamic compaction construction monitoring

Abstract

The utility model is suitable for dynamic compaction construction monitoring, provides a kind of for dynamic compaction construction monitoring's multi-sensor cooperative layout system, including the dynamic compaction site that four corners are positioned by reference point;Several ram points are evenly distributed in dynamic compaction site;Dynamic compaction site is arranged in layers and has shallow layer monitoring system, middle layer monitoring system and deep layer monitoring system;Shallow layer monitoring system includes static level gauge and shallow layer armored BOTDR optical fiber;Middle layer monitoring system includes armored DTS optical fiber and resistivity sensor, and the lead-in optical cable of armored DTS optical fiber and resistivity sensor is led out through same inclined borehole, and then is connected to the main trunk optical cable and is connected to automated monitoring station;Deep layer monitoring system includes deep layer armored BOTDR optical fiber, and the lead-in optical cable of deep layer armored BOTDR optical fiber is led out through same inclined borehole, and then is connected to the main trunk optical cable and is connected to automated monitoring station.The utility model is through multilevel monitoring system, realizes the all-around monitoring of dynamic compaction construction process and foundation change.

Description

Technical Field

[0001] This utility model belongs to the field of dynamic compaction construction monitoring, and in particular relates to a multi-sensor collaborative deployment system for dynamic compaction construction monitoring. Background Technology

[0002] Dynamic compaction first converts mechanical energy into gravitational potential energy by lifting a heavy hammer (usually 8t to 40t). After release, this gravitational potential energy is converted into powerful impact energy. Finally, the impact energy acts on the foundation and is converted into internal energy within the soil. This method effectively compacts soil particles, enhances soil density and compressive strength, improves drainage, reduces foundation settlement and deformation, thereby increasing the foundation's compression modulus and its load-bearing capacity for superstructures. Due to its short construction period, simple construction, wide applicability, and low cost, dynamic compaction is widely used in construction, bridges, docks, dams, and other projects. When performing point compaction, the following steps must be followed: first, determine the starting elevation of the compaction surface and locate the compaction points; each operation must record and calculate the compaction settlement, and only after the target is met can the next cycle begin.

[0003] In dynamic compaction operations using relevant technologies, in addition to construction according to design parameters, it is also necessary to monitor information such as compaction settlement to evaluate the reinforcement effect; otherwise, it is difficult to correct the plan in time, affecting the reinforcement effect. Currently, manual observation is commonly used, with professionals using instruments to measure and calculate. However, this method has many problems: the construction environment is complex, and surveyors need to be far away from the compaction point, making close-range measurement difficult; ground heave, hammer tilt, shock waves, etc., can lead to measurement errors; errors are greater under special weather conditions; mechanical operations may obstruct visibility, requiring instrument repositioning, affecting efficiency and increasing costs. Traditional manual recording and analysis processes are cumbersome, labor-intensive, inefficient, and data-lagging, making it difficult to guarantee construction quality and even potentially leading to data falsification, especially in major projects where limitations are significant. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a multi-sensor collaborative deployment system for monitoring dynamic compaction construction, so as to solve the technical problems mentioned in the background art.

[0005] The present invention is implemented as follows: A multi-sensor collaborative deployment system for monitoring dynamic compaction construction includes a dynamic compaction site where all four corners are located via reference points. The distance between adjacent compaction points is 4m, and several compaction points are evenly distributed within the dynamic compaction site; The dynamic compaction site is equipped with shallow, intermediate, and deep monitoring systems arranged in layers. The shallow monitoring system includes a hydrostatic level and a shallow armored BOTDR fiber optic cable; The mid-level monitoring system includes armored DTS optical fiber and resistivity sensor. The lead optical cable of the armored DTS optical fiber and resistivity sensor is led out through the same inclined borehole and then connected to the trunk optical cable to the automated monitoring station. The deep monitoring system includes deep-armored BOTDR optical fiber. The lead fiber of the deep-armored BOTDR optical fiber is led out through the same inclined borehole and then connected to the trunk optical cable to the automated monitoring station.

[0006] Furthermore, in the shallow monitoring system, each static level is buried at a depth of 60cm and connected to form a monitoring network via optical fiber. The monitoring network is connected to the automated monitoring station below the dynamic compaction site.

[0007] Furthermore, in the shallow monitoring system, the shallow armored BOTDR fiber is single-ended active, with the active end fused to the lead fiber cable, which is then laid along the shallow trench to the automated monitoring station.

[0008] Furthermore, the armored DTS optical fiber and resistivity sensor are distributed 2m to 5m below the ground surface, vertically distributed at a 45-degree angle and horizontally associated.

[0009] Furthermore, the deep-armored BOTDR optical fibers are vertically chained and obliquely distributed, extending from 5m to 15m below the ground surface.

[0010] Furthermore, the benchmark points are set at the four corners outside the dynamic compaction site, 15m away from the compaction points at the four corners inside the site.

[0011] Compared with the prior art, the beneficial effects of this utility model are: Inside the dynamic compaction site, the compaction points are arranged according to strict specifications, with an adjacent spacing of 4m and even distribution. This layout ensures the uniform transfer of dynamic compaction energy, laying the foundation for the accuracy and comparability of subsequent monitoring data.

[0012] The site is laid out in layers, with shallow, medium and deep monitoring systems installed. Through this multi-layered monitoring system, the soil at different depths from the surface to the deepest layers is fully covered, enabling comprehensive monitoring of the dynamic compaction construction process and changes in the foundation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.

[0014] Figure 1 This is a schematic diagram of the overall planar distribution of a multi-sensor collaborative deployment system for monitoring dynamic compaction construction according to this utility model. Figure 2This is a vertical cross-sectional distribution diagram of a multi-sensor collaborative deployment system for monitoring dynamic compaction construction according to this utility model.

[0015] The attached figures are labeled as follows: 1. Benchmark point; 2. tamping points; 3. Shallow monitoring system; 301. Static level; 302. Shallow armored BOTDR fiber optic cable; 4. Optical fiber cable; 5. Dynamic compaction site; 6. Automated monitoring station; 7. Mid-level monitoring system; 701. Armored DTS optical fiber; 702. Resistivity sensor; 8. Deep monitoring system; 801. Deep armored BOTDR fiber optic cable. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0018] like Figure 1 and Figure 2 As shown, in one embodiment of this utility model, a multi-sensor collaborative deployment system for monitoring dynamic compaction construction is provided, including a dynamic compaction site 5 with all four corners located by reference points 1. The reference points 1 need to be far away from vibration sources, underground pipelines, slopes, etc., and are distributed at the four corners outside the dynamic compaction site 5, about 15m away from the compaction points 2 at the four corners inside the dynamic compaction site 5.

[0019] In this embodiment, adjacent compaction points 2 need to be evenly distributed within the dynamic compaction site 5 at a spacing of 4m.

[0020] Furthermore, in this embodiment of the invention, a shallow monitoring system 3, a middle-layer monitoring system 7, and a deep monitoring system 8 are arranged in layers within the dynamic compaction site 5. In one implementation of this utility model, the shallow monitoring system 3 provided in this embodiment includes: The static level instrument 301 is buried at a depth of 60cm and connected to a monitoring network via optical fiber cable 4, and then connected to the automated monitoring station 6 below the dynamic compaction site 5. The shallow monitoring system 3 also includes a shallow armored BOTDR fiber 302, which is single-ended active. Its active end is fused with the lead optical cable 4, and the lead optical cable 4 is laid along the shallow trench to the automated monitoring station 6.

[0021] Furthermore, in one implementation of this utility model, the mid-level monitoring system 7 of this embodiment includes an armored DTS optical fiber 701 and a resistivity sensor 702, which are distributed 2m to 5m below the ground surface, vertically distributed at a 45-degree angle and horizontally coexisting. The lead optical cables 4 of the armored DTS optical fiber 701 and the resistivity sensor 702 are led out through the same inclined borehole and then connected to the main optical cable to the automated monitoring station 6.

[0022] Furthermore, in one implementation of this utility model, the deep monitoring system 8 of this embodiment includes a deep armored BOTDR optical fiber 801, which is vertically chained and obliquely distributed, extending from 5m to 15m below the ground surface. The lead optical cable 4 of the deep armored BOTDR optical fiber 801 is led out through the same inclined borehole and then connected to the main optical cable to the automated monitoring station 6.

[0023] Specifically, the multi-sensor collaborative deployment system in this embodiment is implemented through the following method: The establishment of benchmark point 1 has strict environmental requirements: it must be far away from all vibration sources and avoid areas with interference or potential hazards such as underground pipelines and slopes. The optimal location is the top of a permanent concrete side pier with an embedded stainless steel marker, which can maximize stability and durability and provide a reliable reference benchmark for long-term monitoring. In terms of distribution, benchmark point 1 is set at the four outer corners of the dynamic compaction site 5, about 15m away from the four inner corners of the compaction point 2. This distance can effectively avoid the influence of dynamic compaction vibration and ensure a reasonable spatial relationship with the monitoring area. Inside the dynamic compaction site 5, the compaction points 2 are arranged according to strict specifications, with an adjacent spacing of 4m and even distribution. This layout ensures the uniform transfer of dynamic compaction energy, laying the foundation for the accuracy and comparability of subsequent monitoring data. In addition, a layered layout is adopted within the site, with shallow monitoring system 3, intermediate monitoring system 7, and deep monitoring system 8 respectively. Through a multi-layered monitoring system, the soil at different depths from the surface is fully covered, achieving comprehensive monitoring of the dynamic compaction construction process and foundation changes.

[0024] like Figure 2As shown, the shallow monitoring system 3 comprises two core components: a static level 301 and a shallow armored BOTDR fiber optic cable 302. Each static level 301 is buried 60cm below the ground surface. A 60cm trench is dug to place a fiber optic cable 4, which connects to each static level 301, forming a complete monitoring network. Data from these dispersed level instruments is collected via the fiber optic cable 4 and ultimately connected to the automated monitoring station 6 located below the dynamic compaction site 5, ensuring that surface settlement data can be transmitted to the monitoring center in real time.

[0025] The shallow armored BOTDR fiber 302 and the lead fiber 4 of the hydrostatic level 301 are buried in the same trench, separated by a partition to reduce the amount of excavation. The shallow armored BOTDR fiber 302 adopts a single-end active design mode. Its active end and the lead fiber 4 are seamlessly connected through a fusion splicing process. The connected lead fiber 4 is laid along the pre-excavated shallow trench and eventually extends and converges to the main fiber optic cable, and then connects to the automated monitoring station 6, thereby completing the acquisition and transmission of lateral deformation signals of shallow soil.

[0026] The intermediate layer monitoring system 7 consists of armored DTS optical fiber 701 and resistivity sensor 702. Both sensors are distributed using specialized drilling equipment, with boreholes drilled at a 45° angle to a depth of 5m. The sensors are then horizontally positioned and buried at a 45° angle between 2m and 5m underground, enabling simultaneous monitoring of soil parameters within this depth range. The lead optical cables 4 of both the armored DTS optical fiber 701 and the resistivity sensor 702 are led out from the ground through the same inclined borehole. These lead optical cables 4 are then connected to the main optical cable, which in turn connects to the automated monitoring station 6, enabling centralized transmission of intermediate layer soil temperature and moisture content data.

[0027] The core equipment of the deep monitoring system 8 is the deep armored BOTDR fiber optic cable 801. These fibers are arranged diagonally in a vertical chain, and the monitoring range extends from 5m to 15m below the surface into deep soil. The lead fiber cable 4 of the deep armored BOTDR fiber optic cable 801 is also led out underground through the same inclined borehole, then connected to the main fiber optic cable, and finally connected to the automated monitoring station 6, ensuring that the monitoring data of deep soil compression trend can be stably transmitted to the back-end system.

[0028] The above solutions are merely illustrative examples of preferred embodiments, but are not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0029] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0030] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A multi-sensor collaborative deployment system for monitoring dynamic compaction construction, characterized in that, Including a dynamic compaction site (5) where all four corners are located through a reference point (1); The distance between adjacent compaction points (2) is 4m, and several compaction points (2) are evenly distributed in the dynamic compaction site (5); The dynamic compaction site (5) is equipped with a shallow monitoring system (3), a medium monitoring system (7) and a deep monitoring system (8) arranged in layers. The shallow monitoring system (3) includes a hydrostatic level (301) and a shallow armored BOTDR fiber optic cable (302). The mid-level monitoring system (7) includes armored DTS optical fiber (701) and resistivity sensor (702). The lead optical cable (4) of armored DTS optical fiber (701) and resistivity sensor (702) is led out through the same inclined borehole and connected to the main optical cable to the automated monitoring station (6). The deep monitoring system (8) includes a deep armored BOTDR fiber (801), and the lead fiber cable (4) of the deep armored BOTDR fiber (801) is led out through the same inclined borehole and connected to the trunk fiber cable to the automated monitoring station (6).

2. The multi-sensor collaborative deployment system for monitoring dynamic compaction construction according to claim 1, characterized in that, In the shallow monitoring system (3), each static level (301) is buried at a depth of 60cm and connected to form a monitoring network through a lead fiber cable (4). The monitoring network is connected to the automated monitoring station (6) below the dynamic compaction site (5).

3. The multi-sensor collaborative deployment system for monitoring dynamic compaction construction according to claim 2, characterized in that, In the shallow monitoring system (3), the shallow armored BOTDR fiber (302) is active at one end, and the active end is fused with the lead optical cable (4). The lead optical cable (4) is laid along the shallow trench to the automated monitoring station (6).

4. The multi-sensor collaborative deployment system for monitoring dynamic compaction construction according to claim 3, characterized in that, The armored DTS optical fiber (701) and resistivity sensor (702) are distributed 2m to 5m below the ground surface, and are vertically distributed at a 45-degree angle and horizontally associated.

5. The multi-sensor collaborative deployment system for monitoring dynamic compaction construction according to claim 4, characterized in that, The deep-armored BOTDR fiber (801) is vertically chained and obliquely distributed, extending from 5m to 15m below the ground surface.

6. The multi-sensor collaborative deployment system for monitoring dynamic compaction construction according to any one of claims 2 to 5, characterized in that, The benchmark (1) is set at the four corners outside the dynamic compaction site (5); The distance between the benchmark point (1) and the corresponding corner compaction point (2) in the site is 15m.

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