Construction method, system and equipment for arranging and pulling out steel casing in vibration sensitive area and storage medium

Abstract

The invention relates to a construction method for driving and pulling out a steel casing in a vibration sensitive area, which comprises the following steps of: positioning the set position of the steel casing on the ground, and reinforcing a power area on the ground; a crane is provided, and the steel casing is hoisted by the crane and moved to the positioning position of the steel casing; starting the vibratory hammer, and driving the steel casing into the soil body by using the vibratory hammer; in the steel casing hitting process, vibration monitoring is conducted on the building in the vibration sensitive area; when the steel casing is pulled out, a crane is used for lifting the steel casing, the vibratory hammer is started synchronously, and friction resistance is reduced through vibration. According to the construction method for driving and pulling out the steel casing in the vibration sensitive area, real-time vibration monitoring is carried out on the building in the vibration sensitive area, the working frequency or eccentric torque of the vibratory hammer can be dynamically and finely adjusted, the influence on the building in the vibration sensitive area can be reduced, and construction safety is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and specifically to a construction method, system, equipment, and storage medium for installing and removing steel casings in vibration-sensitive areas. Background Technology

[0002] As urban underground space development deepens, deep foundation pit projects inevitably occur near existing sensitive structures. These structures are extremely sensitive to foundation deformation and vibration. The strong vibration waves generated by conventional vibratory hammer extraction of steel casings can easily lead to additional settlement and cracking of these structures, directly threatening public safety. At the same time, construction noise is also a major source of urban environmental pollution.

[0003] While the concept of a "resonance-free vibratory hammer" exists in existing technologies, it largely remains at the equipment level. The technical solutions focus on the mechanical structure of the equipment itself and do not address systematic engineering applications in specific environments. In practice, the common approach is to simply use a crane to suspend such vibratory hammers for construction, which has significant drawbacks.

[0004] (1) Blindness in frequency selection: The setting of working frequency relies heavily on the operator's experience, and there is a lack of targeted testing and avoidance of the natural frequency of the site soil, which greatly reduces the so-called "resonance-free" effect.

[0005] (2) Insufficient system stability: The compatibility between the vibratory hammer and the crane as a whole power system was overlooked. The vibratory hammer, especially its external power station, will change the center of gravity and torque balance of the crane. Simple connection without rigorous calculation and certification poses a risk of overturning.

[0006] (3) Passive control strategy: lacks a real-time monitoring and feedback mechanism that links with the surrounding environment, and cannot take proactive and precise intervention when the vibration approaches the critical value.

[0007] (4) The foundation treatment is not targeted enough: the treatment of the foundation of the crane station often only considers the static bearing capacity, without fully considering its dynamic response and vibration propagation characteristics under cyclic dynamic load. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction method, system, equipment and storage medium for installing and removing steel casings in vibration-sensitive areas, thereby solving the problems of blind frequency selection, insufficient system stability, passive control strategies and weak targeted foundation treatment in existing non-resonance construction.

[0009] The technical solution to achieve the above objectives is: a construction method for installing and removing steel casings in vibration-sensitive areas, comprising the following steps: positioning the steel casing at a predetermined location on the ground and reinforcing the dynamic area on the ground; providing a crane to lift the steel casing and move it to the designated location; starting a vibratory hammer to drive the steel casing into the soil; monitoring the vibration of buildings in the vibration-sensitive area during the installation of the steel casing; and removing the steel casing by lifting it with the crane and simultaneously starting the vibratory hammer to reduce frictional resistance through vibration.

[0010] In the construction method of installing and removing steel casings in vibration-sensitive areas, the present invention enables real-time vibration monitoring of buildings in vibration-sensitive areas, allowing for dynamic fine-tuning of the working frequency or eccentric torque of the vibratory hammer. This reduces the impact on buildings in vibration-sensitive areas and ensures construction safety.

[0011] A further improvement of the construction method for installing and removing steel casings in vibration-sensitive areas of the present invention is that the positioning of the steel casings on the ground and the reinforcement of the dynamic area on the ground include: replacing and compacting the foundation of the dynamic area and laying rigid roadbed box slabs to form a working platform.

[0012] A further improvement of the construction method for installing and removing steel casings in vibration-sensitive areas of the present invention is that the step of positioning the steel casings on the ground and reinforcing the dynamic area on the ground further includes: identifying the dominant resonant frequency in the construction area by conducting vibration tests on the construction area.

[0013] A further improvement of the construction method for installing and removing steel casings in vibration-sensitive areas of the present invention is that the step of starting the vibratory hammer and using the vibratory hammer to drive the steel casing into the soil includes: setting a non-resonance frequency window according to the dominant resonance frequency; and selecting the operating frequency of the vibratory hammer in the non-resonance frequency window.

[0014] A further improvement of the construction method for installing and removing steel casings in a vibration-sensitive area is that, during the installation of the steel casings, vibration monitoring of the buildings in the vibration-sensitive area includes: installing vibration sensors on the buildings in the vibration-sensitive area.

[0015] A further improvement of the construction method for installing and removing steel casings in a vibration-sensitive area according to the present invention is that, during the installation of the steel casings, vibration monitoring of the building in the vibration-sensitive area further includes: setting up a monitoring and early warning module connected to the vibration sensor to monitor the vibration of the building.

[0016] A further improvement of the construction method for installing and removing steel casings in a vibration-sensitive area according to the present invention is that, during the installation of the steel casings, vibration monitoring of the buildings in the vibration-sensitive area further includes: when the monitored vibration data exceeds a first warning threshold, adjusting the operating frequency of the vibratory hammer; when the monitored vibration data exceeds a second warning threshold, reducing the eccentric torque of the vibratory hammer while adjusting the operating frequency of the vibratory hammer.

[0017] This invention discloses a construction system for installing and removing steel casings in vibration-sensitive areas, comprising: a device measurement module connected to a vibration sensor for collecting vibration data of the building during the installation and removal of the steel casings; a data processing module connected to the device measurement module for comparing and analyzing the vibration data with a first warning threshold and a second warning threshold to obtain a corresponding vibratory hammer adjustment scheme; and a cloud module connected to the data processing module for receiving and outputting the vibratory hammer adjustment scheme.

[0018] The present invention discloses an electronic device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-described construction method for installing and removing steel casings in vibration-sensitive areas.

[0019] The present invention discloses a computer-readable storage medium having a computer program stored thereon, characterized in that the program is executed by a processor to implement the above-described construction method for installing and removing steel casings in vibration-sensitive areas. Attached Figure Description

[0020] Figure 1 This is a schematic flowchart of a construction method for installing and removing steel casings in vibration-sensitive areas according to the present invention.

[0021] Figure 2 This is a flowchart illustrating step S110 of the present invention.

[0022] Figure 3 This is another flowchart illustrating step S110 of the present invention.

[0023] Figure 4 This is a flowchart illustrating step S130 of the present invention.

[0024] Figure 5 This is a flowchart illustrating step S140 of the present invention.

[0025] Figure 6 This is another schematic diagram of step S140 of the present invention.

[0026] Figure 7 This is another schematic diagram of step S140 of the present invention.

[0027] Figure 8 This is a schematic diagram of the construction system for installing and removing steel casings in vibration-sensitive areas according to the present invention.

[0028] Figure 9 This is a schematic diagram of the structure of the electronic device of the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] See Figure 1 This document illustrates a flowchart of a construction method for installing and removing steel casings in vibration-sensitive areas, according to the present invention. The present invention provides a construction method for installing and removing steel casings in vibration-sensitive areas, comprising the following steps:

[0031] Step S110: Locate the steel casing at the designated position on the ground and reinforce the power area on the ground.

[0032] The process involves dividing the construction area to identify the buildings affected by the construction, then dividing the construction area into power zones, which are areas for the movement and positioning of heavy-load power equipment. Next, step S120 is executed.

[0033] Step S120: Provide a crane, use the crane to lift the steel casing and move it to the designated location of the steel casing.

[0034] In this process, a crawler crane is selected to move within the power zone. The counterweight module on the crane is modified by removing some of the original counterweight blocks. The modified counterweight module includes a bracket and a hydraulic power station. After modification, it needs to undergo safety testing by the manufacturer and obtain safety certification. Then, step S130 is executed.

[0035] Execution step S130: Start the vibratory hammer and use it to drive the steel casing into the soil.

[0036] Among them, a non-resonance vibratory hammer with continuously adjustable eccentric torque from 0% to 100% is selected, and then step S140 is executed.

[0037] Step S140: During the installation of the steel casing, vibration monitoring is performed on the buildings in the vibration-sensitive area.

[0038] The installation process of the steel casing involves first lifting the steel casing using the main hook and slings of a crane, moving it to the designated pile position and aligning it, clamping the steel casing with hydraulic clamps, starting the vibratory hammer to drive the steel casing into the predetermined depth, then releasing the clamps and untying the slings. The vibration monitoring process is described in detail below and will not be repeated here. Next, step S150 is executed.

[0039] Step S150: When removing the steel casing, use a crane to lift the steel casing and simultaneously start the vibratory hammer to reduce frictional resistance through vibration.

[0040] The removal process of the steel casing involves attaching the crane's main hook and slings to the top of the steel casing, clamping the casing with hydraulic clamps, starting the vibratory hammer, and lifting and removing the steel casing. The vibratory hammer is then turned off, the steel casing is removed, and it is laid flat on the ground.

[0041] See Figure 2 The diagram shows a flowchart of step S110 of the present invention. The present invention provides a construction method for installing and removing steel casings in vibration-sensitive areas, step S110 including:

[0042] Step S111: The foundation of the power area is replaced and compacted, and a rigid roadbed box slab is laid to form a working platform.

[0043] The process involves removing the surface soft soil in the dynamic zone, backfilling it with construction debris and compacting it, using locally sourced materials for convenient and low-cost construction. Rigid roadbed panels are laid to form a working platform, ensuring flatness.

[0044] See Figure 3 This diagram illustrates another flow chart of step S110 of the present invention. The present invention provides a construction method for installing and removing steel casings in vibration-sensitive areas, wherein step S110 further includes:

[0045] Step S112: Identify the dominant resonant frequency within the construction area by conducting vibration tests on the construction area.

[0046] Among them, the dominant resonant frequency in the construction area was measured using the ground vibration method.

[0047] See Figure 4 The diagram shows a flowchart of step S130 of the present invention. The present invention provides a construction method for installing and removing steel casings in vibration-sensitive areas, step S130 including:

[0048] Execution step S131: Set the non-resonance frequency window according to the dominant resonant frequency.

[0049] The non-resonant frequency window is the frequency range below f0×80% or above f0×120%. Then, step S132 is executed.

[0050] Execute step S132: Select the operating frequency of the vibratory hammer in the non-resonant frequency window.

[0051] In this embodiment, the dominant resonance frequency f0 is measured to be 12Hz using the ground pulsation method, the non-resonance frequency window is set to 14.5-16Hz, and the initial operating frequency of the vibratory hammer can be selected as 15Hz.

[0052] See Figure 5 The diagram shows a flowchart of step S140 of the present invention. The present invention provides a construction method for installing and removing steel casings in vibration-sensitive areas, step S140 including:

[0053] Step S141: Install vibration sensors on buildings within the vibration-sensitive area.

[0054] Among them, buildings in the vibration-sensitive area can be underground passages, subway tunnels, etc.

[0055] See Figure 6 This diagram illustrates another flow chart of step S140 of the present invention. The present invention provides a construction method for installing and removing steel casings in vibration-sensitive areas, wherein step S140 further includes:

[0056] Step S142: Set up a monitoring and early warning module connected to the vibration sensor to monitor the vibration of the building.

[0057] Among these measures, the level of danger of buildings in vibration-sensitive areas is determined based on vibration data collected by vibration sensors, so that staff can make timely adjustments to reduce the impact of construction vibration.

[0058] See Figure 7 This diagram illustrates another flow chart of step S140 of the present invention. The present invention provides a construction method for installing and removing steel casings in vibration-sensitive areas, wherein step S140 further includes:

[0059] Execution step S143: When the monitored vibration data exceeds the first warning threshold, adjust the working frequency of the vibratory hammer.

[0060] Specifically, a first warning threshold is set based on the vibration frequency that the building can withstand. When the monitored vibration data exceeds the first warning threshold, the working frequency of the vibratory hammer is dynamically adjusted by ±0.5Hz. Then, step S144 is executed.

[0061] Step S144: When the monitored vibration data exceeds the second warning threshold, while adjusting the working frequency of the vibratory hammer, reduce the eccentric torque of the vibratory hammer.

[0062] In this process, while adjusting the working frequency of the vibratory hammer, the eccentric torque of the vibratory hammer is reduced by 10% to 20%.

[0063] In this embodiment, the vibratory hammer equipped with a VM / RF system does not generate vibration during startup and shutdown. Instead, the total eccentric torque is adjusted by rotating the upper and lower rows of eccentric blocks half a turn. The eccentric torque of the vibratory hammer can be varied from 0-100% using one or two actuators.

[0064] In this embodiment, during the installation of the steel casing, monitoring point A in the subway tunnel showed that the vibration velocity rose to 2.1 mm / s (exceeding the first warning threshold of 2.0 mm / s). The command center instructed the operating frequency to be fine-tuned to 15.5 Hz. Approximately 5 seconds later, the vibration velocity at this point dropped to 1.7 mm / s, indicating effective control. The second warning threshold (2.3 mm / s) alarm was not triggered during the entire process.

[0065] See Figure 8 This image shows a schematic diagram of a construction system for installing and removing steel casings in vibration-sensitive areas, according to the present invention. The present invention provides a construction system for installing and removing steel casings in vibration-sensitive areas, comprising:

[0066] The device measurement module, connected to the vibration sensor, is used to collect vibration data of the building during the installation and removal of the steel casing.

[0067] The equipment measurement module is connected to each vibration sensor and summarizes the vibration data measured by the vibration sensors.

[0068] The data processing module, connected to the equipment measurement module, is used to compare and analyze the vibration data with the first and second warning thresholds to obtain the corresponding vibration hammer adjustment scheme.

[0069] The data processing module first compares the vibration data transmitted by the equipment measurement module with the first warning threshold, and then compares the vibration data exceeding the first warning threshold with the second warning threshold. Different colors can be marked according to the magnitude of the vibration data, and the colors can be matched with the adjustment scheme to improve work efficiency.

[0070] The cloud module, connected to the data processing module, is used to receive and output the vibratory hammer adjustment scheme.

[0071] The vibration frequency and eccentric torque of the vibratory hammer are adjusted according to the adjustment scheme output by the data processing module.

[0072] See Figure 9 The diagram shows a schematic representation of the structure of the electronic device of the present invention. The present invention provides an electronic device comprising: a memory 901, a processor 902, and a computer program stored in the memory 901 and executable on the processor 902. When the processor 902 executes the program, it implements a construction method for installing and removing steel casings in vibration-sensitive areas as provided in the above embodiments.

[0073] Furthermore, the electronic device also includes a communication interface 903 for communication between the memory 901 and the processor 902.

[0074] The memory 901 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0075] If the memory 901, processor 902, and communication interface 903 are implemented independently, they can be interconnected via a bus to communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, only one thick line is used in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0076] Optionally, in a specific implementation, if the memory 901, processor 902, and communication interface 903 are integrated on a single chip, then the memory 901, processor 902, and communication interface 903 can communicate with each other through an internal interface.

[0077] The processor 902 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present invention.

[0078] The present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a construction method for installing and removing steel casings in vibration-sensitive areas as provided in the above embodiments.

[0079] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A construction method for installing and removing steel casings in vibration-sensitive areas, characterized in that, Includes the following steps: The steel casing is positioned on the ground, and the power zone on the ground is reinforced. A crane is provided, which is used to lift the steel casing and move it to the designated location of the steel casing; Start the vibratory hammer and use it to drive the steel casing into the soil; During the installation of the steel casing, vibration monitoring is conducted on buildings in vibration-sensitive areas; When removing the steel casing, the crane is used to lift the steel casing, and the vibratory hammer is started simultaneously to reduce frictional resistance through vibration.

2. The construction method for installing and removing steel casings in vibration-sensitive areas according to claim 1, characterized in that, The step of positioning the steel casing on the ground and reinforcing the dynamic area on the ground includes: The foundation of the power zone is replaced and compacted, and rigid roadbed box slabs are laid to form a working platform.

3. The construction method for installing and removing steel casings in vibration-sensitive areas according to claim 1, characterized in that, The step of positioning the steel casing on the ground and reinforcing the power zone on the ground also includes: By conducting vibration tests on the construction area, the dominant resonant frequency within the construction area was identified.

4. The construction method for installing and removing steel casings in vibration-sensitive areas according to claim 3, characterized in that, The step of starting the vibratory hammer and using the vibratory hammer to drive the steel casing into the soil includes: The non-resonance frequency window is set according to the dominant resonance frequency; The operating frequency of the vibratory hammer is selected within the non-resonant frequency window.

5. The construction method for installing and removing steel casings in vibration-sensitive areas according to claim 3, characterized in that, During the installation of the steel casing, vibration monitoring of buildings in vibration-sensitive areas includes: Vibration sensors are installed on the building within the vibration-sensitive area.

6. A construction method for installing and removing steel casings in vibration-sensitive areas according to claim 5, characterized in that, The vibration monitoring of buildings in vibration-sensitive areas during the installation of the steel casing also includes: A monitoring and early warning module connected to the vibration sensor is installed to monitor the vibration of the building.

7. A construction method for installing and removing steel casings in vibration-sensitive areas according to claim 6, characterized in that, The vibration monitoring of buildings in vibration-sensitive areas during the installation of the steel casing also includes: When the monitored vibration data exceeds the first warning threshold, the operating frequency of the vibratory hammer is adjusted. When the monitored vibration data exceeds the second warning threshold, the eccentric torque of the vibratory hammer is reduced while adjusting the working frequency of the vibratory hammer.

8. A construction system for installing and removing steel casings in vibration-sensitive areas, characterized in that, include: The device measurement module, connected to the vibration sensor, is used to collect vibration data of the building during the installation and removal of the steel casing. The data processing module connected to the device measurement module is used to compare and analyze the vibration data with the first warning threshold and the second warning threshold to obtain the corresponding vibration hammer adjustment scheme. The cloud module connected to the data processing module is used to receive and output the vibration hammer adjustment scheme.

9. An electronic device, characterized in that, include: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a construction method for installing and removing steel casings in a vibration-sensitive area as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement a construction method for installing and removing steel casings in vibration-sensitive areas as described in any one of claims 1-7.

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