Stone base layered settlement monitoring device and method for underwater blasting construction

Abstract

This invention provides a layered settlement monitoring device and method for riprap foundation beds used in underwater blasting construction. It can be applied to the field of underwater foundation treatment monitoring in waterway engineering. The device includes: a reference system, a layered measuring point system, a pipeline protection system, and a data acquisition system. The reference system includes: a level tank and reference points; the layered measuring point system includes: several measuring devices arranged in layers along the depth direction of the foundation bed; the pipeline protection system includes: flexible protective pipes; the data acquisition system is communicatively connected to each differential pressure hydrostatic level for synchronously collecting differential pressure data before and after blasting construction.

Description

Technical Field

[0001] This invention relates to the field of underwater foundation treatment monitoring technology for waterway engineering, and more specifically, to a layered settlement monitoring device and method for riprap foundation beds used in underwater blasting construction. Background Technology

[0002] Underwater blasting compaction is a core technology for densifying riprap foundations in waterway engineering. It utilizes the shock waves generated by underwater blasting to rearrange and compact riprap particles. It is widely used in underwater foundation treatment for projects such as wharves, breakwaters, and land reclamation. The stratified settlement of the foundation bed is a key indicator for evaluating the compaction effect, optimizing blasting construction parameters, and controlling project construction quality, directly determining the long-term stability of the underwater foundation.

[0003] Among related technologies, the monitoring technology for underwater subgrade settlement has the following technical problems: First, existing layered settlement monitoring mostly uses conventional layered settlement rods and ordinary differential pressure sensors. The strong impact of underwater blasting, blasting shock waves, and displacement of boulders can easily damage the sensors and break the pipelines, making it impossible to keep them intact during the blasting process. Second, the measuring points cannot form an overall settlement with the subgrade, resulting in serious data distortion. Third, existing methods such as scanning and water-weighted depth sounding can only measure the total settlement on the surface of the subgrade and cannot obtain deep layered settlement data. Summary of the Invention

[0004] In view of this, the present invention provides a device and method for monitoring the settlement of stratified riprap foundations for underwater blasting construction.

[0005] One aspect of the present invention provides a layered settlement monitoring device for riprap foundation bed for underwater blasting construction, comprising: a reference system, a layered measuring point system, a pipeline protection system, and a data acquisition system;

[0006] The reference system includes: a liquid level tank and reference points; the liquid level tank is located in a stable area outside the impact zone of the blasting and compaction; the installation elevation of the liquid level tank is higher than the elevation of all layered measuring points and is connected to the atmosphere; the reference points are laid out on the stable foundation around the liquid level tank.

[0007] The layered measuring point system includes: several measuring devices arranged in layers along the depth direction of the subgrade. Each measuring device includes: a rigid bearing steel plate, configured to form an integral settlement body that deforms in tandem with the boulders subgrade; a sealed protective cover, fixed to the upper surface of the rigid bearing steel plate; a differential pressure static level, fixedly installed inside the sealed protective cover; and a buffer filling layer, filling the sealed protective cover and covering the differential pressure static level.

[0008] The pipeline protection system includes: a flexible protective pipe; the water supply pipes and air supply pipes of each differential pressure hydrostatic level are all installed inside the flexible protective pipe and led out to the stable area to connect with the liquid level tank.

[0009] The data acquisition system is connected to each differential pressure static level to collect differential pressure data synchronously before and after blasting construction.

[0010] According to an embodiment of the present invention, the rigid bearing steel plate is a steel plate with a thickness that meets the bearing stiffness requirements of the underwater rock foundation.

[0011] According to an embodiment of the present invention, the sealed protective cover is a metal sealed cover; the buffer filling layer is a closed-cell foam material.

[0012] According to an embodiment of the present invention, the data acquisition system includes a multi-channel data acquisition module, a storage module, and a wireless transmission module that are interconnected.

[0013] Another aspect of the present invention provides a method for monitoring the stratified settlement of a rubble foundation bed during underwater blasting construction, using the aforementioned stratified settlement monitoring equipment for a rubble foundation bed during underwater blasting construction, comprising:

[0014] A benchmark system was set up outside the impact zone of the blasting and compaction, and the first absolute elevation of the benchmark points was obtained;

[0015] Based on the layered filling construction of the subgrade, corresponding measuring devices are installed at each layer measuring point;

[0016] Connect the liquid level tank to each differential pressure static level. Based on the benchmark points collected before the blasting construction, the differential pressure data of each measuring device, and the first absolute elevation, determine the second absolute elevation of each layer of measuring points.

[0017] After the blasting and compaction, the third absolute elevation of each layer of measuring points is determined based on the pressure difference data collected from the benchmark points and each measuring device, as well as the first absolute elevation.

[0018] Based on the second and third absolute elevations of each layer of measuring points, the settlement of each layer of measuring points after the blasting and compaction construction is determined.

[0019] According to an embodiment of the present invention, the planar dimensions of the rigid bearing steel plate are larger than the maximum particle size of the stones constituting the subgrade, so that the rigid bearing steel plate can span several stones and can form an integral settlement body that deforms in tandem with the subgrade.

[0020] According to an embodiment of the present invention, the range of the differential pressure hydrostatic level is determined based on the depth of the liquid level tank corresponding to the setting location and the estimated settlement amount, so that the normal working range of the differential pressure hydrostatic level is located in the middle section of the full range.

[0021] According to an embodiment of the present invention, when water pipes, air pipes and signal cables are run through flexible protective pipes, a relaxation allowance is reserved to accommodate the settlement and deformation of the subgrade.

[0022] According to an embodiment of the present invention, the reference point is provided with a rigid structure, which can resist vibration interference caused by blasting.

[0023] According to an embodiment of the present invention, after each round of blasting and compaction, the first absolute elevation of the benchmark point is re-acquired.

[0024] According to embodiments of the present invention, a specialized protective structure combining a sealed protective cover and a closed-cell foam buffer layer is designed for differential pressure sensors. The rigid structure resists the compression of boulders and the shock wave of blasting, while the closed-cell foam buffer layer absorbs vibration energy. Combined with a flexible protective tube, this solves the problems of easy damage and pipe breakage of existing sensors under blasting conditions, ensuring that the differential pressure sensor can still function normally after multiple rounds of blasting. Furthermore, the rigid bearing steel plate settles synchronously with the foundation bed, making the data from the differential pressure sensor accurate and reliable. Furthermore, the present invention uses benchmark points outside the blasting influence zone, unaffected by blasting vibrations. An absolute elevation benchmark is obtained through external high-precision measurement, and the absolute elevation of the layered measuring points is directly obtained by calculating the differential pressure data from the benchmark measuring points and the layered measuring points, effectively improving the accuracy of determining the settlement of each layered measuring point after blasting construction. Attached Figure Description

[0025] The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0026] Figure 1 A schematic diagram of a stratified settlement monitoring device for riprap foundation for underwater blasting construction, according to an embodiment of the present invention, is shown.

[0027] Figure 2 A flowchart illustrating a method for monitoring the stratified settlement of a riprap foundation bed for underwater blasting construction, according to an embodiment of the present invention, is shown. Detailed Implementation

[0028] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0030] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0031] In the embodiments of this invention, the collection, updating, analysis, processing, use, transmission, provision, disclosure, and storage of data (e.g., including but not limited to user personal information) comply with relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures have been taken to prevent unauthorized access to user personal information data and to safeguard user personal information security, network security, and national security.

[0032] In the embodiments of the present invention, the user's authorization or consent is obtained before acquiring or collecting the user's personal information.

[0033] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0034] According to embodiments of the present invention, such as Figure 1 As shown, the present invention discloses a layered settlement monitoring device for riprap foundation bed used in underwater blasting construction, comprising: a reference system, a layered measuring point system, a pipeline protection system, and a data acquisition system.

[0035] The reference system includes: a liquid level tank and reference points; the liquid level tank is located in a stable area outside the impact zone of the blasting and compaction; the installation elevation of the liquid level tank is higher than the elevation of all layered measuring points and is connected to the atmosphere; the reference points are laid out on the stable foundation around the liquid level tank.

[0036] The layered measuring point system includes: several measuring devices arranged in layers along the depth direction of the subgrade. Each measuring device includes: a rigid bearing steel plate, configured to form an integral settlement body that deforms in tandem with the boulders subgrade; a sealed protective cover, fixed to the upper surface of the rigid bearing steel plate; a differential pressure static level, fixedly installed inside the sealed protective cover; and a buffer filling layer, filling the sealed protective cover and covering the differential pressure static level.

[0037] For example, the rigid bearing steel plate can be a 1m diameter rigid bearing steel plate, the size of which is adapted to the maximum particle size of 0~500kg boulders in the boulder foundation. The steel plate size is more than 1.7 times the maximum particle size of the boulders, and can span multiple boulders, avoiding local penetration or suspension, forming a whole settlement body with the boulder foundation that settles synchronously, ensuring that the settlement at the measuring point is completely equal to the actual settlement of the corresponding layer of the foundation.

[0038] The pipeline protection system includes: a flexible protective pipe; the water supply pipes and air supply pipes of each differential pressure hydrostatic level are all installed inside the flexible protective pipe and led out to the stable area to connect with the liquid level tank.

[0039] For example, a flexible protective tube is a protective tube reinforced with steel wire.

[0040] The data acquisition system is connected to each differential pressure static level to collect differential pressure data synchronously before and after blasting construction.

[0041] According to an embodiment of the present invention, the rigid bearing steel plate is a steel plate with a thickness that meets the bearing stiffness requirements of the underwater rock foundation.

[0042] According to an embodiment of the present invention, the sealed protective cover is a metal sealed cover; the buffer filling layer is a closed-cell foam material.

[0043] According to an embodiment of the present invention, the data acquisition system includes a multi-channel data acquisition module, a storage module, and a wireless transmission module that are interconnected.

[0044] like Figure 2 As shown, this invention discloses a method for monitoring the stratified settlement of a riprap foundation bed during underwater blasting construction. The method utilizes the aforementioned stratified settlement monitoring equipment for a riprap foundation bed during underwater blasting construction, comprising:

[0045] S101. Set up a benchmark system outside the impact zone of the blasting and compaction, and obtain the first absolute elevation of the benchmark point;

[0046] In this embodiment, the first absolute elevation of the reference point can be determined using methods such as multibeam scanning and water depth sounding.

[0047] In this embodiment, the liquid level tank is connected to the atmosphere.

[0048] S102. Based on the layered filling construction of the subgrade, corresponding measuring devices are installed at each layer measuring point;

[0049] For example, the subgrade layering can be the bottom of the subgrade, the interface between different filler layers, or layers set at fixed intervals. The measuring device is installed along with the subgrade layering, requiring no drilling or additional underwater operations, and does not affect the normal construction progress; it can realize continuous cyclic monitoring before and after multiple rounds of blasting, without the need to redeploy the equipment after each round of blasting, and can obtain full-cycle layered settlement data at different depths of the subgrade, accurately determine the effective influence depth of blasting, and provide core data support for optimizing blasting construction parameters and evaluating compaction effects.

[0050] S103. Connect the liquid level tank to each differential pressure static level. Based on the benchmark points collected before the blasting construction, the differential pressure data of each measuring device, and the first absolute elevation, determine the second absolute elevation of each layer of measuring points.

[0051] For example, connect all differential pressure hydrostatic level instruments to the level tank to complete the system filling and venting, eliminating the interference of air bubbles in the pipeline on subsequent measurements.

[0052] S104. After the blasting and compaction construction, the third absolute elevation of each layer of measuring points is determined based on the pressure difference data of the benchmark points and each measuring device, as well as the first absolute elevation.

[0053] S105. Based on the second and third absolute elevations of each layer of measuring points, determine the settlement of each layer of measuring points after the blasting and compaction construction.

[0054] In this embodiment, the settlement amount can be the difference between the second absolute elevation and the third absolute elevation.

[0055] According to an embodiment of the present invention, the planar dimensions of the rigid bearing steel plate are larger than the maximum particle size of the stones constituting the subgrade, so that the rigid bearing steel plate can span several stones and can form an integral settlement body that deforms in tandem with the subgrade.

[0056] According to an embodiment of the present invention, the range of the differential pressure hydrostatic level is determined based on the depth of the liquid level tank corresponding to the setting location and the estimated settlement amount, so that the normal working range of the differential pressure hydrostatic level is located in the middle section of the full range.

[0057] The normal operating range of a differential pressure hydrostatic level is 50% to 70% of its full scale, ensuring measurement accuracy and range redundancy.

[0058] According to an embodiment of the present invention, when water pipes, air pipes and signal cables are run through flexible protective pipes, a relaxation allowance is reserved to accommodate the settlement and deformation of the subgrade.

[0059] For example, for every 10 meters of water pipes, air pipes, and signal cables laid, an additional 1 meter of slack length is allowed to prevent pipe breakage or damage due to foundation settlement or rock displacement.

[0060] According to an embodiment of the present invention, the reference point is provided with a rigid structure, which can resist vibration interference caused by blasting.

[0061] For example, the rigid structure has a weight of not less than 20kg and a size of not less than 1m×1m.

[0062] According to an embodiment of the present invention, after each round of blasting and compaction, the first absolute elevation of the benchmark point is re-acquired.

[0063] In this embodiment, after each round of blasting and compaction, the first absolute elevation of the benchmark point is re-acquired, which can eliminate benchmark drift.

[0064] Those skilled in the art will understand that the features described in the various embodiments of the present invention can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments of the present invention can be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

[0065] The embodiments of the present invention have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of the invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the invention, and all such substitutions and modifications should fall within the scope of the invention.

Claims

1. A layered settlement monitoring device for riprap foundation beds used in underwater blasting construction, characterized in that, include: Reference system, layered measuring point system, pipeline protection system, and data acquisition system; The reference system includes: a liquid level tank and reference points; the liquid level tank is located in a stable area outside the impact zone of the blasting and compaction; the installation elevation of the liquid level tank is higher than the elevation of all layered measuring points and is connected to the atmosphere; the reference points are arranged on the stable foundation around the liquid level tank. The layered measuring point system includes: a plurality of measuring devices arranged in layers along the depth direction of the foundation bed, each measuring device including: a rigid bearing steel plate configured to form an integral settlement body that deforms in tandem with the boulders foundation bed; a sealed protective cover fixed to the upper surface of the rigid bearing steel plate; a differential pressure hydrostatic level fixedly installed inside the sealed protective cover; and a buffer filling layer filling the sealed protective cover and covering the differential pressure hydrostatic level. The pipeline protection system includes: a flexible protective pipe; the water supply pipe and air supply pipe of each differential pressure hydrostatic level are all installed inside the flexible protective pipe and led out to the stable area to connect with the liquid level tank; The data acquisition system is communicatively connected to each of the differential pressure static level instruments and is used to synchronously collect differential pressure data before and after blasting construction.

2. The stratified settlement monitoring equipment for riprap foundation bed used in underwater blasting construction according to claim 1, characterized in that, The rigid bearing steel plate is a steel plate whose thickness meets the bearing stiffness requirements of underwater boulders foundation.

3. The stratified settlement monitoring equipment for riprap foundations used in underwater blasting construction according to claim 2, characterized in that, The sealed protective cover is a metal sealed cover; the buffer filling layer is a closed-cell foam material.

4. The stratified settlement monitoring equipment for riprap foundation bed used in underwater blasting construction according to claim 3, characterized in that, The data acquisition system includes interconnected multi-channel data acquisition modules, storage modules, and wireless transmission modules.

5. A method for monitoring the stratified settlement of a riprap foundation bed during underwater blasting construction, using the stratified settlement monitoring equipment for a riprap foundation bed during underwater blasting construction as described in any one of claims 1 to 4, characterized in that, include: The benchmark system is deployed outside the impact zone of the blasting and compaction, and the first absolute elevation of the benchmark point is obtained; Based on the layered filling construction of the subgrade, the corresponding measuring devices are installed at each layer measuring point; Connect the liquid level tank to each of the differential pressure static level instruments, and determine the second absolute elevation of each layer of measuring points based on the differential pressure data of the benchmark points and each of the measuring devices collected before the blasting construction, as well as the first absolute elevation. After the blasting and compaction construction, the third absolute elevation of each layer of measuring points is determined based on the pressure difference data collected from the benchmark points and each of the measuring devices, as well as the first absolute elevation. Based on the second absolute elevation and the third absolute elevation of each layer of measuring points, the settlement of each layer of measuring points after the blasting and compaction construction is determined.

6. The method for monitoring the layered settlement of riprap foundation for underwater blasting construction according to claim 5, characterized in that, The planar dimensions of the rigid bearing steel plate are larger than the maximum particle size of the stones constituting the base bed, so that the rigid bearing steel plate can span several stones and form an integral settlement body that deforms in tandem with the base bed.

7. The method for monitoring the layered settlement of riprap foundation for underwater blasting construction according to claim 6, characterized in that, The range of the differential pressure hydrostatic level is determined based on the depth of the liquid level tank corresponding to the setting position and the estimated settlement amount, so that the normal working range of the differential pressure hydrostatic level is located in the middle section of the full range.

8. The method for monitoring the layered settlement of riprap foundation for underwater blasting construction according to claim 7, characterized in that, When the water pipe, the air pipe, and the signal cable are run through the flexible protective pipe, a slack allowance is reserved to accommodate the settlement and deformation of the subgrade.

9. The method for monitoring the layered settlement of riprap foundation for underwater blasting construction according to claim 8, characterized in that, The reference point is equipped with a rigid structure, which can resist vibration interference caused by blasting.

10. The method for monitoring the layered settlement of riprap foundation for underwater blasting construction according to claim 9, characterized in that, After each round of blasting and compaction, the first absolute elevation of the reference point is re-acquired.

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