Steel cofferdam adjustable pressure protection system and pressure adjusting method

Abstract

The invention relates to the technical field of steel cofferdams, and discloses a steel cofferdam adjustable pressure protection system and a pressure adjusting method.The system comprises a height determining module which is configured to collect the maximum value of the water level of a water area where a steel cofferdam is located, determine the height of a pressure reducing air bag according to the maximum value of the water level and fix the pressure reducing air bag to the outer side wall of the steel cofferdam; the pressure determination module is configured to collect the pressure value of the water area for each sub-airbag, determine the inflation pressure of different sub-airbags, and inflate each sub-airbag according to the inflation pressure; the pressure adjusting module is configured to collect the water flow speed and conduct primary adjustment on the inflation pressure of the pressure reduction air bag according to the water flow speed; the pressure adjusting module is further configured to collect the water area temperature and conduct secondary adjustment on the inflation pressure of the pressure reduction air bag according to the water area temperature. The anti-pressure ability of the steel cofferdam is integrally improved, structural damage caused by the water level, the water pressure and the water flow speed is effectively prevented, and the long-term stability and safety of the steel cofferdam are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of steel cofferdams, and in particular to an adjustable pressure protection system and a pressure regulating method for a steel cofferdam. Background Art

[0002] Steel cofferdam is a temporary steel structure built for the construction of permanent water conservancy facilities in water conservancy project construction. Its main function is to prevent water and soil from entering the construction site of the building so as to drain water, excavate foundation pits and build buildings in the cofferdam. The design and construction of steel cofferdams need to take into account their overall stability and anti-overturning capacity to ensure the safety and effectiveness of the construction process. There are various types of steel cofferdams, including steel sheet pile cofferdams, lock steel pipe pile cofferdams, double-wall steel box cofferdams, single-wall steel box cofferdams, steel hanging box cofferdams, etc. These cofferdams are suitable for different engineering conditions and needs. For example, steel sheet pile cofferdams are mainly suitable for water and soil retaining enclosure facilities during the excavation of small and medium-sized foundation pits with a base depth of 6 to 8 meters. During the use of steel cofferdams, a number of safety measures need to be taken into consideration, including but not limited to the design and calculation of the inner and outer walls of the cofferdam, diagonal braces, inner braces, purlins and other load-bearing components and connecting welds, ensuring that operations such as excavation, lifting, and pouring concrete do not collide with the cofferdam supports, and conducting necessary monitoring and inspections during the construction process to ensure the smooth progress and safe completion of the project.

[0003] Traditional steel cofferdam construction methods usually do not set up pressure regulating structures when dealing with water flow pressure. Instead, they protect by setting the height and placement of the steel cofferdam. Although this approach can provide certain protection, its pressure relief effect is relatively limited. In this traditional method, the design and layout of the steel cofferdam are usually fixed and fail to dynamically adjust to changes in water flow pressure. Since water flow pressure and environmental conditions may change, the pressure relief effect is insufficient and may even cause damage or failure of the cofferdam structure.

[0004] Therefore, it is necessary to provide a steel cofferdam adjustable pressure protection system and a pressure regulation method to solve the problem of poor pressure resistance of traditional steel cofferdam structures. Summary of the invention

[0005] In view of this, the present invention proposes an adjustable pressure protection system for a steel cofferdam and a pressure regulation method, aiming to solve the problem of poor pressure resistance of traditional steel cofferdam structures.

[0006] In one aspect, the present invention provides a steel cofferdam adjustable pressure protection system, comprising:

[0007] A height determination module is configured to collect the maximum water level of the water area where the steel cofferdam is located, and determine the height of the decompression airbag according to the maximum water level, wherein the decompression airbag includes a plurality of sub-airbags, and the sub-airbags are sequentially arranged on the outer side wall of the steel cofferdam from top to bottom;

[0008] A pressure determination module is configured to collect the pressure value of the water area for each of the sub-airbags, determine the inflation pressure of different sub-airbags according to the pressure value, and inflate each of the sub-airbags according to the inflation pressure;

[0009] A pressure adjustment module is configured to collect the water flow velocity after the inflation is completed, and determine whether to adjust the inflation pressure of the decompression airbag once according to the water flow velocity, and when it is determined to be adjusted, adjust the inflation pressure of the decompression airbag once according to the water flow velocity;

[0010] The pressure adjustment module is further configured to collect the water area temperature, determine whether to perform a secondary adjustment on the inflation pressure of the decompression airbag, and if it is determined to be adjusted, perform a secondary adjustment on the inflation pressure of the decompression airbag according to the water area temperature.

[0011] Furthermore, the height determination module is configured to collect the maximum water level of the water area where the steel cofferdam is located, and determine the height of the decompression airbag according to the maximum water level, including:

[0012] Compare the water level information of different time periods to obtain the maximum water level, so that the height of the decompression airbag is greater than the maximum water level;

[0013] An airbag bracket is arranged on the outer side wall of the steel cofferdam, and the decompression airbag is installed on the airbag bracket.

[0014] Further, the pressure determination module is configured to collect the pressure value of the water area for each of the sub-airbags, determine the inflation pressure of different sub-airbags according to the pressure value, and inflate each of the sub-airbags according to the inflation pressure, including:

[0015] A plurality of sampling points are arranged on each of the sub-airbags, and pressure values ​​of the plurality of sampling points of each sub-airbag are sampled simultaneously;

[0016] Calculating the average pressure of each sub-airbag respectively, and determining the inflation pressure of each sub-airbag respectively according to the average pressure;

[0017] The inflation pressure of each of the sub-airbags is 1.2 times the corresponding average pressure.

[0018] Further, the pressure adjustment module is configured to collect the water flow velocity after the inflation is completed, and determine whether to adjust the inflation pressure of the decompression airbag once according to the water flow velocity, including:

[0019] Presetting a maximum flow rate, and when the water flow rate is greater than or equal to the maximum flow rate, determining that the inflation pressure of the decompression airbag needs to be adjusted;

[0020] When the water flow velocity is less than the maximum flow velocity, it is determined that there is no need to adjust the pressure of the decompression airbag.

[0021] Further, the pressure adjustment module is configured to adjust the inflation pressure of the decompression airbag once according to the water flow rate when it is determined to be adjusted, including:

[0022] Calculating the rate of change of the current water flow velocity and the water flow velocity when the decompression airbag is inflated, and calculating the difference between the current water flow velocity and the maximum flow velocity;

[0023] The rate of change is calculated by the following formula:

[0024] R = (V1-V2) / Δt;

[0025] In the above formula, R represents the rate of change, V1 represents the current water flow velocity, V2 represents the water flow velocity when the decompression airbag is inflated, and Δt represents the interval between V1 and V2 acquisition;

[0026] The difference is calculated by the following formula:

[0027] ΔV=V1-Vmax;

[0028] In the above formula, ΔV represents the difference, V1 represents the current water flow velocity, and Vmax represents the maximum flow velocity;

[0029] Setting a standard change rate, if the change rate is less than or equal to the standard change rate, adjusting the inflation pressure of the decompression airbag only by the difference;

[0030] If the change rate is greater than the standard change rate, the inflation pressure of the decompression airbag is adjusted according to the change rate and the difference.

[0031] Further, if the change rate is less than or equal to the standard change rate, the inflation pressure of the decompression airbag is adjusted only by the difference, including:

[0032] Pt1=P+k1*P;

[0033] In the above formula, Pt1 represents the inflation pressure after only difference adjustment, P represents the initial inflation pressure of the decompression airbag, k1 represents the difference adjustment coefficient when the change rate is less than or equal to the standard change rate, 0.1≤k1≤0.3.

[0034] Furthermore, if the change rate is greater than the standard change rate, the inflation pressure of the decompression airbag is adjusted according to the change rate and the difference, including:

[0035] Pt2=P+k2*P+k3*P;

[0036] In the above formula, Pt2 represents the inflation pressure adjusted by the change rate and the difference, P represents the initial inflation pressure of the decompression airbag, k2 represents the difference adjustment coefficient when the change rate is greater than the standard change rate, 0.3<k2≤0.5, k2 represents the change rate adjustment coefficient, 0.1≤k2≤0.5.

[0037] Furthermore, the pressure adjustment module is further configured to collect the water area temperature and determine whether to perform a secondary adjustment on the inflation pressure of the decompression airbag, including:

[0038] Setting a standard water temperature range, if the water area temperature is not within the standard water temperature range, it is determined that the inflation pressure needs to be adjusted a second time;

[0039] If the water area temperature is within the standard water temperature range, it is determined that there is no need to perform a secondary adjustment on the inflation pressure.

[0040] Furthermore, if the water area temperature is not within the standard water temperature range, then it is determined that the inflation pressure needs to be adjusted for a second time, including:

[0041] When the water area temperature is greater than the maximum value of the standard water temperature range, the inflation pressure is adjusted secondary by a first adjustment factor; wherein the first adjustment factor is less than 1;

[0042] When the water area temperature is lower than the minimum value of the standard water temperature range, the inflation pressure is adjusted secondary by a second adjustment factor; wherein the second adjustment factor is greater than 1 and less than 1.5.

[0043] Compared with the prior art, the beneficial effect of the present invention is that the present invention effectively copes with the variable factors such as water level, water pressure and water flow speed in complex waters through the synergistic effect of the height determination module, the pressure determination module and the pressure adjustment module. First, the height determination module collects the maximum water level of the water area, and determines the height of the decompression airbag accordingly, and fixes the decompression airbag on the outer wall of the steel cofferdam to ensure that the decompression airbag can cover all pressure intervals outside the cofferdam. The decompression airbag is composed of several sub-airbags, which are arranged from top to bottom, so that the system can set the inflation pressure in sections according to the pressure difference at different water depths. The pressure determination module collects the pressure of each sub-airbag in real time, accurately determines the inflation pressure of each sub-airbag, and ensures that each sub-airbag is balanced with the external water pressure. The pressure adjustment module dynamically determines whether it is necessary to adjust the inflation pressure of the decompression airbag by collecting the water flow speed and the water area temperature, especially when the water flow speed or temperature changes beyond the set range, through the primary adjustment and the secondary adjustment, it is ensured that the inflation pressure of the decompression airbag is always adapted to the external environment. In summary, the present invention improves the compressive resistance of the steel cofferdam as a whole, effectively prevents structural damage caused by changes in water pressure, and ensures the long-term stability and safety of the steel cofferdam.

[0044] On the other hand, the present application also provides a pressure regulation method for steel cofferdam adjustable pressure protection, comprising:

[0045] The maximum water level of the water area where the steel cofferdam is located is collected, and the height of the decompression airbag is determined according to the maximum water level, wherein the decompression airbag includes a plurality of sub-airbags, and the sub-airbags are sequentially arranged on the outer side wall of the steel cofferdam from top to bottom;

[0046] Collecting the pressure value of each of the sub-airbags in the water area, determining the inflation pressure of different sub-airbags according to the pressure value, and inflating each of the sub-airbags according to the inflation pressure;

[0047] After the inflation is completed, the water flow velocity is collected, and it is determined whether to adjust the inflation pressure of the decompression airbag once according to the water flow velocity. When it is determined to be adjusted, the inflation pressure of the decompression airbag is adjusted once according to the water flow velocity;

[0048] The water area temperature is collected to determine whether to perform a secondary adjustment on the inflation pressure of the decompression airbag. If it is determined to be adjusted, the inflation pressure of the decompression airbag is secondary adjusted according to the water area temperature.

[0049] It can be understood that the adjustable pressure protection system and pressure regulation method of a steel cofferdam provided in the present application have the same beneficial effects and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0051] Figure 1 A functional block diagram of a steel cofferdam adjustable pressure protection system provided by an embodiment of the present invention;

[0052] Figure 2 A flow chart of a pressure regulating method for adjustable pressure protection of a steel cofferdam provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] In some embodiments of the present application, see Figure 1 As shown, this embodiment provides a steel cofferdam adjustable pressure protection system, including:

[0055] The height determination module is configured to collect the maximum water level of the water area where the steel cofferdam is located, and determine the height of the decompression airbag according to the maximum water level, wherein the decompression airbag includes a plurality of sub-airbags, which are sequentially arranged on the outer side wall of the steel cofferdam from top to bottom;

[0056] The pressure determination module is configured to collect the pressure value of each sub-airbag in the water area, determine the inflation pressure of different sub-airbags according to the pressure value, and inflate each sub-airbag according to the inflation pressure;

[0057] The pressure adjustment module is configured to collect the water flow velocity after the inflation is completed, and determine whether to adjust the inflation pressure of the decompression airbag according to the water flow velocity. When it is determined to be adjusted, the inflation pressure of the decompression airbag is adjusted according to the water flow velocity;

[0058] The pressure adjustment module is also configured to collect the water temperature and determine whether to make a secondary adjustment to the inflation pressure of the decompression airbag. If it is determined to be adjusted, the inflation pressure of the decompression airbag is adjusted secondary according to the water temperature.

[0059] It is understandable that the present invention effectively copes with the variable factors such as water level, water pressure and water flow speed in complex waters through the synergy of the height determination module, the pressure determination module and the pressure adjustment module. First, the height determination module collects the maximum water level of the water area, and determines the height of the decompression airbag accordingly, and fixes the decompression airbag on the outer wall of the steel cofferdam to ensure that the decompression airbag can cover all pressure intervals outside the cofferdam. The decompression airbag is composed of several sub-airbags, which are arranged from top to bottom, so that the system can set the inflation pressure in sections according to the pressure difference at different water depths. The pressure determination module collects the pressure of each sub-airbag in real time, accurately determines the inflation pressure of each sub-airbag, and ensures that each sub-airbag is balanced with the external water pressure. The pressure adjustment module dynamically determines whether it is necessary to adjust the inflation pressure of the decompression airbag by collecting the water flow speed and the water area temperature, especially when the water flow speed or temperature changes beyond the set range, through the primary adjustment and the secondary adjustment, it is ensured that the inflation pressure of the decompression airbag is always adapted to the external environment. In summary, the present invention improves the compressive resistance of the steel cofferdam as a whole, effectively prevents structural damage caused by changes in water pressure, and ensures the long-term stability and safety of the steel cofferdam.

[0060] In some embodiments of the present application, the height determination module is configured to collect the maximum water level of the water area where the steel cofferdam is located, and determine the height of the decompression airbag according to the maximum water level, including:

[0061] Compare the water level information of different time periods to obtain the maximum water level, so that the height of the decompression airbag is greater than the maximum water level;

[0062] An airbag bracket is arranged on the outer side wall of the steel cofferdam, and the decompression airbag is installed on the airbag bracket.

[0063] It is understandable that the present invention can firstly accurately obtain the maximum water level by comparing the water level information of different time periods, thereby ensuring that the decompression airbag can effectively cope with extreme water level changes and provide stronger protection. Secondly, setting the height of the decompression airbag higher than the maximum water level helps to improve the fault tolerance of the system and prevent overpressure on the steel cofferdam when the water level rises under special circumstances. At the same time, the use of the airbag bracket can firmly support the decompression airbag and ensure its safe installation on the outer wall of the steel cofferdam to avoid displacement or damage under strong water flow or external force, which not only improves the service life of the decompression airbag, but also enhances the reliability and adaptability of the entire protection system.

[0064] In some embodiments of the present application, the pressure determination module is configured to collect the pressure value of each sub-airbag in the water area, determine the inflation pressure of different sub-airbags according to the pressure value, and inflate each sub-airbag according to the inflation pressure, including:

[0065] A plurality of sampling points are set on each sub-airbag, and pressure value sampling is performed simultaneously on the plurality of sampling points of each sub-airbag;

[0066] Calculate the average pressure of each sub-airbag respectively, and determine the inflation pressure of each sub-airbag according to the average pressure;

[0067] The inflation pressure of each airbag is 1.2 times the corresponding average pressure.

[0068] It is understandable that the present invention uses multiple sampling points to collect pressure values, which can comprehensively and accurately reflect the actual pressure distribution of the water area on the sub-airbags, avoiding the deviation that may be caused by a single sampling point. Secondly, by calculating the average pressure value, it ensures that the inflation pressure of each sub-airbag matches the water area pressure it is subjected to, so that the airbag can provide sufficient support and protection. Finally, setting the inflation pressure to 1.2 times the average pressure value can provide a certain margin for the sub-airbag, and can still maintain the stability and protective effect of the airbag when the water area pressure suddenly increases. The safety and adaptability of the protection system are improved, ensuring the long-term stable operation of the steel cofferdam in complex water environments.

[0069] In some embodiments of the present application, the pressure adjustment module is configured to collect the water flow rate after the inflation is completed, and determine whether to adjust the inflation pressure of the decompression airbag according to the water flow rate, including:

[0070] The maximum flow rate is preset, and when the water flow rate is greater than or equal to the maximum flow rate, it is determined that the inflation pressure of the decompression airbag needs to be adjusted;

[0071] When the water flow rate is less than the maximum flow rate, it is determined that there is no need to adjust the pressure of the decompression airbag.

[0072] In some embodiments of the present application, the pressure adjustment module is configured to adjust the inflation pressure of the decompression airbag once according to the water flow rate when it is determined to be adjusted, including:

[0073] Calculate the rate of change of the current water flow velocity and the water flow velocity when the decompression airbag is inflated, and calculate the difference between the current water flow velocity and the maximum flow velocity;

[0074] The rate of change is calculated by the following formula:

[0075] R = (V1-V2) / Δt;

[0076] In the above formula, R represents the rate of change, V1 represents the current water flow velocity, V2 represents the water flow velocity when the decompression airbag is inflated, and Δt represents the interval between V1 and V2 acquisition;

[0077] The difference is calculated by the following formula:

[0078] ΔV=V1-Vmax;

[0079] In the above formula, ΔV represents the difference, V1 represents the current water flow velocity, and Vmax represents the maximum flow velocity;

[0080] Set a standard change rate. If the change rate is less than or equal to the standard change rate, the inflation pressure of the decompression airbag is adjusted only by the difference;

[0081] If the rate of change is greater than the standard rate of change, the inflation pressure of the decompression airbag is adjusted according to the rate of change and the difference.

[0082] In some embodiments of the present application, if the rate of change is less than or equal to the standard rate of change, the inflation pressure of the decompression airbag is adjusted only by the difference, including:

[0083] Pt1=P+k1*P;

[0084] In the above formula, Pt1 represents the inflation pressure after only difference adjustment, P represents the initial inflation pressure of the decompression airbag, k1 represents the difference adjustment coefficient when the change rate is less than or equal to the standard change rate, 0.1≤k1≤0.3.

[0085] In some embodiments of the present application, if the rate of change is greater than the standard rate of change, then adjusting the inflation pressure of the decompression airbag by the rate of change and the difference includes:

[0086] Pt2=P+k2*P+k3*P;

[0087] In the above formula, Pt2 represents the inflation pressure adjusted by the change rate and the difference, P represents the initial inflation pressure of the decompression airbag, k2 represents the difference adjustment coefficient when the change rate is greater than the standard change rate, 0.3<k2≤0.5, k2 represents the change rate adjustment coefficient, 0.1≤k2≤0.5.

[0088] It can be understood that the present invention can determine in real time whether the water flow velocity exceeds the safety range by presetting the maximum flow velocity, ensuring that the system can respond quickly under high flow rate conditions. Secondly, the rate of change of the water flow velocity and the difference with the maximum flow velocity are calculated, so that the system can accurately identify the changing trend of the water flow environment. The inflation pressure of the airbag is adjusted by combining the difference or the rate of change with the difference, further enhancing the flexibility and response speed of the system. The set standard change rate and difference adjustment coefficient ensure that a smaller pressure adjustment is used when the water flow is stable, and when the water flow changes drastically, a larger adjustment coefficient can be used in time to enhance the protection ability of the decompression airbag, thereby effectively adapting to the pressure changes in complex water environments and improving the overall safety and protection efficiency of the steel cofferdam.

[0089] In some embodiments of the present application, the pressure adjustment module is further configured to collect the water temperature and determine whether to perform a secondary adjustment on the inflation pressure of the decompression airbag, including:

[0090] Set the standard water temperature range. If the water area temperature is not within the standard water temperature range, it is determined that the inflation pressure needs to be adjusted again;

[0091] If the water temperature is within the standard water temperature range, it is determined that there is no need to make a secondary adjustment to the inflation pressure.

[0092] In some embodiments of the present application, if the water area temperature is not within the standard water temperature range, it is determined that the inflation pressure needs to be adjusted for a second time, including:

[0093] When the water area temperature is greater than the maximum value of the standard water temperature range, the inflation pressure is adjusted secondary by the first adjustment factor; wherein the first adjustment factor is less than 1;

[0094] When the water area temperature is lower than the minimum value of the standard water temperature range, the inflation pressure is adjusted secondary by a second adjustment factor; wherein the second adjustment factor is greater than 1 and less than 1.5.

[0095] It is understandable that, first of all, by setting the standard water temperature range, the system can automatically determine whether the water temperature is within the safe range, ensuring that the decompression airbag can work effectively under different temperature conditions. When the water temperature exceeds the maximum value of the standard range, the system reduces the inflation pressure of the airbag through the first adjustment factor to avoid high temperature causing excessive pressure in the airbag and causing safety hazards. When the water temperature is lower than the minimum value of the standard range, the system increases the inflation pressure through the second adjustment factor to ensure that the airbag still has sufficient elasticity and support under low temperature conditions. This dynamic adjustment based on water temperature can effectively respond to temperature changes in different waters, improve the adaptability and safety of the system, and ensure the stability and durability of the steel cofferdam in various environments.

[0096] On the other hand, see Figure 2 As shown, the present application also provides a pressure regulating method for steel cofferdam adjustable pressure protection, which is applied to the above steel cofferdam adjustable pressure protection system, comprising the following steps:

[0097] S100, collecting the maximum water level of the water area where the steel cofferdam is located, and determining the height of the decompression airbag according to the maximum water level, wherein the decompression airbag includes a plurality of sub-airbags, which are sequentially arranged on the outer side wall of the steel cofferdam from top to bottom;

[0098] S200, collecting the pressure value of each airbag in the water area, determining the inflation pressure of different airbags according to the pressure value, and inflating each airbag according to the inflation pressure;

[0099] S300, after the inflation is completed, the water flow velocity is collected, and it is determined whether to adjust the inflation pressure of the decompression airbag once according to the water flow velocity. If it is determined to be adjusted, the inflation pressure of the decompression airbag is adjusted once according to the water flow velocity;

[0100] S400, collecting the water area temperature, determining whether to perform a secondary adjustment on the inflation pressure of the decompression airbag, and if it is determined to be adjusted, performing a secondary adjustment on the inflation pressure of the decompression airbag according to the water area temperature.

[0101] It is understandable that, through step S100, the height of the decompression airbag is determined according to the maximum water level of the water area, ensuring that the arrangement of the decompression airbag adapts to different water levels, thereby providing a stable protection effect. Secondly, step S200 collects the pressure values ​​of each sub-airbag and accurately adjusts the inflation pressure of each sub-airbag according to these data, so that the entire system can flexibly respond to external pressure conditions, thereby improving the accuracy and effectiveness of protection. In step S300, the airbag pressure is adjusted once according to the water flow velocity, further optimizing the response speed and flexibility of the system to adapt to different flow conditions and ensure the safety and stability of the cofferdam. Finally, step S400 introduces a temperature adjustment mechanism, which makes a secondary adjustment according to the water area temperature, thereby enhancing the system's adaptability to temperature changes. Overall, this method provides a comprehensive protection effect through multiple dynamic adjustments of water level, pressure, water flow velocity, and temperature, and improves the durability and safety of the steel cofferdam.

[0102] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0103] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0104] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0105] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A steel cofferdam adjustable pressure protection system, characterized in that: include: A height determination module is configured to collect the maximum water level of the water area where the steel cofferdam is located, and determine the height of the decompression airbag according to the maximum water level, wherein the decompression airbag includes a plurality of sub-airbags, and the sub-airbags are sequentially arranged on the outer side wall of the steel cofferdam from top to bottom; A pressure determination module is configured to collect the pressure value of the water area for each of the sub-airbags, determine the inflation pressure of different sub-airbags according to the pressure value, and inflate each of the sub-airbags according to the inflation pressure; A pressure adjustment module is configured to collect the water flow velocity after the inflation is completed, and determine whether to adjust the inflation pressure of the decompression airbag once according to the water flow velocity, and when it is determined to be adjusted, adjust the inflation pressure of the decompression airbag once according to the water flow velocity; The pressure adjustment module is further configured to collect the water area temperature, determine whether to perform a secondary adjustment on the inflation pressure of the decompression airbag, and if it is determined to be adjusted, perform a secondary adjustment on the inflation pressure of the decompression airbag according to the water area temperature.

2. The steel cofferdam adjustable pressure protection system according to claim 1 is characterized in that: The height determination module is configured to collect the maximum water level of the water area where the steel cofferdam is located, and determine the height of the decompression airbag according to the maximum water level, including: Compare the water level information of different time periods to obtain the maximum water level, so that the height of the decompression airbag is greater than the maximum water level; An airbag bracket is arranged on the outer side wall of the steel cofferdam, and the decompression airbag is installed on the airbag bracket.

3. The steel cofferdam adjustable pressure protection system according to claim 2 is characterized in that: The pressure determination module is configured to collect the pressure value of the water area for each of the sub-airbags, determine the inflation pressure of different sub-airbags according to the pressure value, and inflate each of the sub-airbags according to the inflation pressure, including: A plurality of sampling points are arranged on each of the sub-airbags, and pressure values ​​of the plurality of sampling points of each sub-airbag are sampled simultaneously; Calculating the average pressure of each sub-airbag respectively, and determining the inflation pressure of each sub-airbag respectively according to the average pressure; The inflation pressure of each of the sub-airbags is 1.2 times the corresponding average pressure.

4. The steel cofferdam adjustable pressure protection system according to claim 3 is characterized in that: The pressure adjustment module is configured to collect the water flow velocity after the inflation is completed, and determine whether to adjust the inflation pressure of the decompression airbag once according to the water flow velocity, including: Presetting a maximum flow rate, and when the water flow rate is greater than or equal to the maximum flow rate, determining that the inflation pressure of the decompression airbag needs to be adjusted; When the water flow velocity is less than the maximum flow velocity, it is determined that there is no need to adjust the pressure of the decompression airbag.

5. The steel cofferdam adjustable pressure protection system according to claim 4 is characterized in that: The pressure adjustment module is configured to adjust the inflation pressure of the decompression airbag once according to the water flow rate when it is determined to be adjusted, including: Calculating the rate of change of the current water flow velocity and the water flow velocity when the decompression airbag is inflated, and calculating the difference between the current water flow velocity and the maximum flow velocity; The rate of change is calculated by the following formula: R = (V1-V2) / Δt; In the above formula, R represents the rate of change, V1 represents the current water flow velocity, V2 represents the water flow velocity when the decompression airbag is inflated, and Δt represents the interval between V1 and V2 acquisition; The difference is calculated by the following formula: ΔV=V1-Vmax; In the above formula, ΔV represents the difference, V1 represents the current water flow velocity, and Vmax represents the maximum flow velocity; Setting a standard change rate, if the change rate is less than or equal to the standard change rate, adjusting the inflation pressure of the decompression airbag only by the difference; If the change rate is greater than the standard change rate, the inflation pressure of the decompression airbag is adjusted according to the change rate and the difference.

6. The steel cofferdam adjustable pressure protection system according to claim 5, characterized in that: If the change rate is less than or equal to the standard change rate, the inflation pressure of the decompression airbag is adjusted only by the difference, including: Pt1=P+k1*P; In the above formula, Pt1 represents the inflation pressure after only difference adjustment, P represents the initial inflation pressure of the decompression airbag, k1 represents the difference adjustment coefficient when the change rate is less than or equal to the standard change rate, 0.1≤k1≤0.

3.

7. The steel cofferdam adjustable pressure protection system according to claim 6, characterized in that: If the change rate is greater than the standard change rate, the inflation pressure of the decompression airbag is adjusted according to the change rate and the difference, including: Pt2=P+k2*P+k3*P; In the above formula, Pt2 represents the inflation pressure adjusted by the change rate and the difference, P represents the initial inflation pressure of the decompression airbag, k2 represents the difference adjustment coefficient when the change rate is greater than the standard change rate, 0.3<k2≤0.5, k2 represents the change rate adjustment coefficient, 0.1≤k2≤0.

5.

8. The steel cofferdam adjustable pressure protection system according to claim 7, characterized in that: The pressure adjustment module is further configured to collect the water area temperature and determine whether to perform a secondary adjustment on the inflation pressure of the decompression airbag, including: Setting a standard water temperature range, if the water area temperature is not within the standard water temperature range, it is determined that the inflation pressure needs to be adjusted a second time; If the water area temperature is within the standard water temperature range, it is determined that there is no need to perform a secondary adjustment on the inflation pressure.

9. The steel cofferdam adjustable pressure protection system according to claim 8, characterized in that: If the water area temperature is not within the standard water temperature range, then it is determined that the inflation pressure needs to be adjusted for a second time, including: When the water area temperature is greater than the maximum value of the standard water temperature range, the inflation pressure is adjusted secondary by a first adjustment factor; wherein the first adjustment factor is less than 1; When the water area temperature is lower than the minimum value of the standard water temperature range, the inflation pressure is adjusted secondary by a second adjustment factor; wherein the second adjustment factor is greater than 1 and less than 1.

5.

10. A pressure regulating method for steel cofferdam adjustable pressure protection, applied to the steel cofferdam adjustable pressure protection system according to any one of claims 1 to 9, characterized in that: include: The maximum water level of the water area where the steel cofferdam is located is collected, and the height of the decompression airbag is determined according to the maximum water level, wherein the decompression airbag includes a plurality of sub-airbags, and the sub-airbags are sequentially arranged on the outer side wall of the steel cofferdam from top to bottom; Collecting the pressure value of each of the sub-airbags in the water area, determining the inflation pressure of different sub-airbags according to the pressure value, and inflating each of the sub-airbags according to the inflation pressure; After the inflation is completed, the water flow velocity is collected, and it is determined whether to adjust the inflation pressure of the decompression airbag once according to the water flow velocity. When it is determined to be adjusted, the inflation pressure of the decompression airbag is adjusted once according to the water flow velocity; The water area temperature is collected to determine whether to perform a secondary adjustment on the inflation pressure of the decompression airbag. If it is determined to be adjusted, the inflation pressure of the decompression airbag is secondary adjusted according to the water area temperature.

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