Dust and noise reduction green shield system for in-situ building renovation and construction method

Abstract

This invention relates to the field of building construction protection technology, and discloses a dust and noise reduction green shield system and construction method for in-situ preservation and renovation of buildings. The system includes: inspecting and evaluating building walls; calculating the reinforcement adaptation coefficient of openings and dynamically adjusting the reinforcement scheme based on wall conditions; statistically analyzing the upper load and dynamically balancing the construction space; testing the wall strength and confirming material properties; combining the coupling calculation of wall structural gaps and tie bolt torque to analyze the impact of background noise on cantilever system construction and dynamically optimizing protection decisions; associating construction live load, sealing noise reduction coefficient, and space requirements; through dynamic adaptation calculation, precisely adapting the current wall structure for reinforcement, intelligently installing the steel structure, and deploying the canopy system; after the canopy system is deployed, through multi-source sensor intelligent linkage and dynamic modeling optimization, combined with temperature-dynamically corrected dust concentration linkage thresholds, dynamically adjusting mechanical power, and optimizing the demolition sequence and intensity in real time.

Description

Technical Field

[0001] This invention relates to the field of building construction protection technology, specifically to the Green Shield system for dust and noise reduction and construction method for in-situ preservation and renovation of buildings. Background Technology

[0002] Currently, a large number of historical buildings urgently need in-situ preservation renovation, the core feature of which is the preservation of the building's exterior structure while demolishing and rebuilding the internal structure. These buildings are mostly located in densely populated urban built-up areas, where the dust and noise generated during construction have a particularly significant impact on neighboring buildings and residents. The current renovation process typically involves first reinforcing the exterior walls, followed by demolition work. During construction, scaffolding and other protective facilities are often erected outside the reinforcement system, resulting in significant occupation of external construction space and narrow access routes, significantly hindering construction efficiency. Furthermore, current reliance on traditional techniques such as fencing and manual watering for noise and dust reduction has limited effectiveness. Currently, there is a lack of environmentally friendly construction equipment and technologies in this field, making it difficult to effectively reduce disturbance to the surrounding built environment and residents. Therefore, it is necessary to provide a green shield system for dust and noise reduction and construction methods for the in-situ preservation and renovation of buildings. Summary of the Invention

[0003] The purpose of this invention is to provide a dust and noise reduction system and construction method for in-situ preservation and renovation of buildings. To solve the above-mentioned problems in the prior art, this invention is achieved through the following technical solution: The first part, the dust and noise reduction construction method for in-situ preservation and renovation of buildings provided in the embodiments of the present invention, specifically includes the following steps: Step 1: Inspect and evaluate the building walls, calculate the reinforcement adaptation coefficient of the openings, and formulate a dynamic adjustment reinforcement plan based on the wall conditions; test the bearing capacity of the foundation, count the upper load, calculate the spacing of the anchor bolts, and dynamically balance the construction space. Step 2: Test the wall strength and confirm the material properties, construct a dual-coupled calculation model, combine the coupled calculation of wall structure gaps and tie bolt torque, optimize the layout, analyze the impact of background noise on the construction of the cantilever system, and dynamically optimize protection decisions; correlate construction live load, sealing noise reduction coefficient and space requirements. Step 3: Through multi-dimensional data-driven dynamic adaptation calculations, the current wall structure is precisely adapted for structural reinforcement, and the steel structure and canopy system are intelligently deployed. Step 4: After the canopy system is deployed, the entire process is controlled in a closed loop through multi-source sensor intelligent linkage and dynamic modeling optimization. Combined with temperature dynamic correction of dust concentration linkage threshold, a demolition priority model is constructed, mechanical power is dynamically adjusted, and the demolition sequence and intensity are optimized in real time.

[0004] Furthermore, the method for dynamically adjusting the reinforcement scheme is as follows: The compressive strength of the wall within a preset range around the opening was tested using a concrete rebound hammer. After removing outliers, the arithmetic mean was taken to obtain the measured compressive strength of the wall. The damage level of the opening is classified according to its degree of damage; a formula for calculating the reinforcement adaptation coefficient of the opening is constructed; the reinforcement adaptation coefficient of the opening is obtained by combining the measured average length and average width of the opening and the measured compressive strength of the wall; and the reinforcement method and parameters are dynamically adjusted. Remove all old and loose doors and windows with damaged levels, and fill and reinforce them according to the reinforcement adaptation coefficient of the opening; adjust the reserved gap between the edge of the treated opening and the steel structure reinforcement. Furthermore, the method for dynamically balancing the construction space is as follows: The bearing capacity of the foundation was tested by plate load test, and the characteristic value of the bearing capacity of the foundation after stabilization was recorded and the average value was taken; the total load of the superstructure was calculated. A dual calculation model is constructed. The total load of the superstructure is combined with the product of the bolt stress reduction factor, the characteristic value of the foundation bearing capacity and the number of anchor bolts per meter. The arithmetic square root is then calculated to obtain the horizontal spacing of the anchor bolts. The excavation depth is determined by the sum of the foundation beam section height and the preset cushion layer thickness, and the anchor bolts are pre-embedded according to the horizontal spacing of the anchor bolts; Furthermore, the method for constructing the dual-coupled computational model is as follows: The actual compressive strength of the wall was tested using the core sampling method. Three core samples were selected from each wall surface, and the strength was tested after standard curing and the average value was taken. Check the steel structure material qualification certificates to obtain the yield strength of the steel columns and lattice columns, measure the outer diameter of the sprinkler system pipelines, and count the horizontal load of the steel structure reinforcement system. A dual-coupled calculation model is constructed using the gaps in the wall structure to analyze and obtain the gaps. The tightening torque of the tie bolts is calculated by comprehensively considering the preset torque coefficient, safety factor, horizontal load, and wall structure gaps. Furthermore, the method for optimizing the layout is as follows: Based on the gaps in the wall structure, mark the drilling positions on the wall surface. After curing, use a pull-out test to check the anchoring force. If it fails, re-drill holes and re-insert the anchor. The outer steel column and the inner lattice column are fixed by pre-embedded anchor bolts and pre-tightened. Weld channel steel tie members between the steel columns and the lattice columns, install tie bolts and tighten them according to the tightening torque to form an overall load-bearing system; Spray pipe channels are reserved in the gaps of the wall structure, and the pipes are fixed by snap-on brackets, which are welded to the steel structure. Furthermore, the method for dynamic adaptation calculation is as follows: The average wind speed in the construction area was measured using wind speed sensors, and the daily progress of internal demolition operations and the conventional demolition speed were statistically analyzed. The dustproof efficiency of the double-layer dense mesh netting was tested, the projected area of ​​the building top was measured, and the minimum opening and closing time of the canopy was determined in combination with the construction interval; a parameter calculation model of the canopy system was constructed to calculate the opening and closing speed of the canopy; the edge clamping force of the canopy was calculated in combination with wind pressure load and internal construction micro-positive pressure. Furthermore, the method for deploying the canopy system is as follows: A track system is installed on the top of the steel column at the top of the building, and is fixed to the steel structure with expansion bolts. Limiting devices are installed at both ends of the track. A double-layer dense mesh canopy is installed, and a variable frequency motor is used as the canopy drive system. The motor speed is adjusted according to the opening and closing speed of the canopy, and the opening and closing position is monitored in real time. Rubber sealing strips are installed at the edge of the canopy, and the push rod thrust is dynamically adjusted according to the edge clamping force of the canopy; an emergency manual device for the canopy is configured; after the canopy is fully closed, a laser rangefinder is used to check the top sealing gap point by point. If the gap is greater than the preset threshold, the clamping device is adjusted until the dustproof and noise reduction design requirements are met. Furthermore, the method for closed-loop control throughout the entire process is as follows: Dust concentration sensors were deployed at various points in the construction area for pre-monitoring to obtain the maximum and average dust concentrations. Temperature sensors were used to measure the temperature in the construction area. The number of monitoring points was then calculated. Dynamically correct the dust concentration linkage threshold and calculate the spraying duration; evenly distribute monitoring points in the construction area, install sensors inside the protection system, and lay monitoring system pipelines and networks; Install the main and branch pipes of the sprinkler system and connect them to the PLC controller. When the dust concentration at any monitoring point exceeds the linkage threshold, the sprinkler system in the corresponding area will be automatically triggered to start. The dust generator was used to simulate excessive dust levels to verify the response time of the spray system and whether the dust concentration after spraying met the standards; the automatic threshold adjustment function was verified by simulating temperature changes. Furthermore, the method for constructing the demolition priority model is as follows: Vibration sensors were used to measure the allowable vibration velocity of the retained wall, and the allowable vibration velocity limit of the wall was determined according to the specifications; the real-time stress of the retained wall was calculated; the dimensions of the original internal structural components were measured, and the weight of the components to be removed was calculated. A demolition priority model was constructed, using the ratio of demolition dust concentration, demolition noise, and real-time stress of the retained wall to the corresponding limit as input parameters to analyze and determine the demolition sequence priority. The demolition machinery operating power is dynamically adjusted based on the rated power of the machinery, real-time vibration speed, dust concentration limits, and noise limits. An initial demolition plan is formulated, and the internal structure is divided into several areas. After each area is demolished, the priority of subsequent areas is recalculated. If dust, vibration, or noise exceeds the standard, the demolition is suspended and the spraying time or machinery power is adjusted.

[0005] The second part, the Green Shield system for dust and noise reduction in in-situ preservation and renovation of buildings provided in this embodiment of the invention, specifically includes the following modules: Original structure treatment module: Treat the current building structure facade, remove some old and loose doors and windows, and fill the door and window openings with masonry or reinforce them with steel. Basic construction module: Excavate earthwork downwards along the wall, construct the wall beams, and pre-embed anchor bolts in the beams for connection to the superstructure; Reinforcement System Module: Connecting holes are drilled into the surface of the current structural wall. After drilling, connecting bolts are inserted. Once the concrete reaches the design strength, the steel structure reinforcement components are installed. Steel columns are installed on the outer side of the exterior wall, and lattice columns are installed on the inner side. The foundation beams are connected by pre-embedded anchor bolts, maintaining a gap with the wall. Channel steel is welded onto the steel structure, and holes are drilled in the channel steel. Connecting bolts are used to connect the inner lattice columns and the outer steel columns, jointly providing reinforcement to the wall surface. Protection system module: Install the outer cantilever frame and protection. The cantilever steel is welded to the column steel. Walkway panels are installed in the horizontal direction. Steel structure steps are installed in some vertical places for people to walk on. Cold-formed thin-walled rolled edge steel tie beams are welded to the upper part of the cantilever steel. The outer profiled steel sheet is connected and fixed to the steel tie beams with self-tapping screws to achieve facade protection. Skylight System Module: The skylight system has automatic opening and closing control functions. When closed, it achieves full coverage of the top of the building. The skylight adopts a double-layer dense mesh structure. Monitoring system module: Laying the pipeline network for the internal monitoring system and sprinkler system; Module removal: Except for retaining the wall structure, remove other original structural components inside.

[0006] The beneficial effects of this invention are: 1. Through a multi-dimensional dynamic coupling calculation model and intelligent closed-loop control mechanism, the system systematically solves the challenges of synergistically addressing structural safety, dust and noise reduction, and construction efficiency in the renovation of narrow spaces. It optimizes the foundation construction based on the anchor bolt spacing, adapting the opening reinforcement coefficient to the wall gap, thereby reducing space occupation. It integrates wall strength, pipeline requirements, and load calculations to achieve structural gap reduction. By linking the bolt torque and sealing noise reduction coefficient with the profiled steel sheet installation strategy, it achieves integrated structural reinforcement and acoustic sealing. The canopy opening and closing speed is adaptively adjusted based on wind speed and demolition progress, with edge clamping force compensating for wind pressure and dust. The sprinkler system is dynamically triggered by temperature correction thresholds and diffusion time to shorten the time of excessive dust. Mechanical power is linked to control vibration speed, dust, and noise. The demolition sequence is dynamically optimized based on stress and environmental data, reducing structural damage and improving construction efficiency. 2. Construct a multi-dimensional parameter correlation system to deeply integrate the needs of structural reinforcement, dust and noise reduction, and space utilization, forming an integrated construction system of reinforcement, protection, canopy and monitoring; by using the reinforcement adaptation coefficient of the opening and the gap of the wall structure, dynamically correlate the wall strength, load and ambient wind speed to achieve real-time optimization of reinforcement method, bolt torque and canopy opening and closing speed, breaking through the limitations of multi-objective isolated design in traditional construction, adopting a combination structure of double-layer canopy and sealed protective plate, closed-loop linkage of dust and spraying, and dynamic adjustment technology of demolition sequence and mechanical power to solve the problems of limited space for in-situ renovation, uncontrolled dust and noise, and conflict between safety and efficiency. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a flowchart of the steps of the construction method for dust and noise reduction in the in-situ preservation and renovation of buildings provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the Green Shield system for dust and noise reduction in the in-situ preservation and renovation of buildings provided in Embodiment 2 of the present invention. Detailed Implementation

[0009] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0010] Example 1: As Figure 1 As shown in the embodiment of the present invention, the construction method for dust and noise reduction in the in-situ preservation and renovation of buildings specifically includes the following steps: Step 1: Inspect and evaluate the building walls, calculate the reinforcement adaptation coefficient of the openings, and formulate a dynamic adjustment reinforcement plan based on the wall conditions; test the bearing capacity of the foundation, count the upper load, calculate the spacing of the anchor bolts, and dynamically balance the construction space. In a specific embodiment, a laser rangefinder is used to measure the three-dimensional dimensions of all door and window openings on the current building facade, and the length a (horizontal direction) and width b (vertical direction) of each opening are recorded. A total of 3 sets of data are measured and the average value is taken. The compressive strength of the walls within a predetermined range around the opening was tested using a concrete rebound hammer. Four test points were selected for each opening, and the arithmetic mean was taken after removing outliers to obtain the measured compressive strength of the walls around the opening. ; Based on the degree of damage to the tunnel entrance, the damage level of the tunnel entrance is statistically classified into three levels: minor damage, moderate damage, and severe damage. It should be noted that the damage level of the opening is pre-defined according to the degree of damage to the opening. If only the sealant of the door and window opening is aged, it is considered minor damage; if the corners of the opening are cracked, it is considered moderate damage; and if the size of the opening is deformed by ≥10% or the wall is efflorescent, it is considered severe damage. Formula for calculating the fit coefficient of the construction portal reinforcement Analysis yielded the fit coefficient for the reinforcement of the opening. Dynamically adjust the reinforcement method and parameters; in, This is the measured average length of the opening. This represents the measured average width of the opening. The measured compressive strength of the wall; Remove all old and loose doors and windows from all openings with a damage level, clean up the debris around the openings, and fill and reinforce them according to the reinforcement fit coefficient of the openings; All treated opening edges and the reserved gaps between them and subsequent steel structure reinforcement components are uniformly determined according to... Adjustments are made, with the preset adjustment range being [50mm, 100mm], to ensure the transfer of reinforcement force and avoid occupying additional construction space; The bearing capacity of the foundation was tested by plate load test, and the characteristic value of the bearing capacity of the foundation after stabilization was recorded. A total of 3 test points were set up and the average value was taken. The total load F of the superstructure is calculated, including the self-weight of the steel structure reinforcement system F1, the self-weight of the protection system F2, the self-weight of the canopy system F3, and the construction live load F4. The live load safety factor is calculated by F=F1+F2+F3+1.2F4. Measure the current wall axis spacing L to determine the construction range of the foundation beam; A dual calculation model is constructed to dynamically adjust the foundation construction parameters. The ratio of the obtained total load of the superstructure to the product of the bolt stress reduction coefficient, the characteristic value of the foundation bearing capacity, and the number of anchor bolts per meter is processed, and the arithmetic square root is calculated to obtain the horizontal spacing s of the anchor bolts. Obtain the cross-sectional height of the foundation beam, add the cross-sectional height of the foundation beam to the preset thickness of the cushion layer to obtain the excavation depth H, and excavate the earthwork 1m outside the retained wall. The excavation depth is dynamically adjusted according to the excavation depth H to avoid over-excavation and occupying extra space. Pour a 100mm thick concrete cushion layer. After the cushion layer strength reaches 5MPa, tie the foundation beam reinforcement. The anchor bolts are pre-embedded according to the calculated horizontal spacing of the anchor bolts, with an exposed bolt length of 150mm. The pre-embedding deviation is controlled within [-2mm, 2mm]. C30 concrete foundation beams are poured. During the curing period of the foundation beams, the internal temperature of the concrete is monitored in real time using a temperature sensor. When the internal and external temperature difference exceeds 25℃, geotextile is covered and water is sprayed for curing. After testing by a rebound hammer, the superstructure construction is carried out. Step 2: Test the wall strength and confirm the material properties, construct a dual-coupled calculation model, combine the coupled calculation of wall structure gaps and tie bolt torque, optimize the layout, analyze the impact of background noise on the construction of the cantilever system, and dynamically optimize protection decisions; correlate construction live load, sealing noise reduction coefficient and space requirements. In a specific embodiment, core sampling is used to test the actual compressive strength of the wall. Three core samples were selected from each wall surface, and the strength was tested after standard curing, with the average value taken. The yield strength of the steel columns and lattice columns was obtained by referring to the steel structure material certificate. ;Measure the outer diameter of the sprinkler system pipeline ; Statistical analysis of horizontal loads on steel structure reinforcement systems ; A dual-coupling calculation model is constructed, and core parameters are dynamically adjusted. The calculation formula for the gap between the steel structure and the wall is used. The analysis yielded the gaps in the wall structure, among which, Provides space for pipeline installation operations. This is the conversion factor for horizontal loads. The contact width of the wall under stress; The safety factor, horizontal load, and wall structure clearance are multiplied by the preset torque coefficient to obtain the tightening torque T of the tie bolt. The preset torque coefficient is determined in combination with the bolt material and the friction coefficient of the connecting parts. Based on the calculated wall structure gaps, mark the drilling positions on the wall surface, clean the dust inside the holes after drilling, inject anchoring adhesive, insert chemical anchors, and use a pull-out test to check the anchoring force after curing. If the anchoring force is not up to standard, re-drill holes and re-insert the anchors. Install the outer steel columns and the inner lattice columns, and fix them with pre-embedded anchor bolts. The tightening torque of the nuts is 1.1 times the tightening torque of the tie bolts. Weld channel steel tie members between the steel columns and the lattice columns. The opening position of the channel steel is precisely aligned with the connecting bolt. Install the tie bolts and tighten them with a torque wrench according to the tightening torque to ensure that the steel structure forms an integral load-bearing system. Spray pipe channels are reserved in the gaps of the wall structure, and snap-on brackets are installed through the pipe routes. The brackets are welded and fixed to the steel structure to avoid vibration and noise caused by direct contact between the pipes and the wall. Background noise in the construction area was measured using a noise meter. The permissible noise limit was measured at the boundary of the surrounding residential area. The standard value of construction live load was statistically analyzed, the sound insulation R of the profiled steel sheet was tested, the minimum required width B of the construction passage was measured, and B=1.2m was taken for two-person passage. A parameter calculation model for the cantilever system was constructed, and the spacing of the cantilevered steel sections was calculated using the formula. The analysis yielded the horizontal spacing of the cantilevered steel sections, among which, This is the initial value for the horizontal spacing. This represents the standard value of the construction live load. For the section modulus of the cantilever steel, For the yield strength of the steel section, For the moment of inertia of the cantilever steel section, This represents the maximum bending moment at the cantilever end. The difference between the obtained background noise of the construction area and the measured allowable noise limit is calculated and then compared with the sound insulation of the protective board to obtain the sealing noise reduction coefficient. Based on the calculated horizontal spacing of the cantilevered steel sections, I-beam cantilever sections are welded to the outside of the steel columns, and round steel tie rods are welded to the cantilever ends. The upper ends of the tie rods are fixed to the upper channel steel tie members to form a triangular stability system. The walkway slabs are installed horizontally and fixed to the cantilevered steel sections using U-shaped clips, ensuring that the walkway slabs are not loose. Steel structure steps are installed vertically, with the step width matching that of the walkway slabs, and steel pipe railings are installed on both sides. Cold-formed thin-walled rolled-edge steel tie beams are welded to the upper part of the cantilevered steel. The spacing of the tie beams is set according to 1 / 2 of the horizontal spacing of the cantilevered steel to ensure that the fixing points of the protective plate are evenly distributed. After welding is completed, the outer profiled steel sheet is installed, and the installation decision for the outer profiled steel sheet is made based on the obtained sealing and noise reduction coefficient. For example, when the sealing noise reduction coefficient is ≥0.8, self-tapping screws are used for direct fixing, with the screws penetrating the profiled steel sheet and connecting to the tie beam; when the sealing noise reduction coefficient is <0.8, sound insulation cotton is pasted on the inside of the profiled steel sheet, and then fixed with self-tapping screws, with sealing gaskets added at the screw locations to ensure the sealing noise reduction effect. The joints of the protective panels are connected with tongue and groove joints, with weather-resistant sealant applied to the outside and angle steel strips used to fix the inside to prevent gaps from causing dust and sound leakage during construction. Step 3: Through multi-dimensional data-driven dynamic adaptation calculations, the current wall structure is precisely adapted for structural reinforcement, and the steel structure and canopy system are intelligently installed to achieve synergistic optimization of safety with zero settlement, zero space waste, and environmental compliance. In a specific embodiment, the average wind speed v in the construction area is measured using a wind speed sensor; the daily progress of internal demolition work is statistically analyzed. And set a standard demolition speed; To test the dustproof efficiency η of the double-layer dense mesh netting, measure the projected area A of the building's top, and calculate the minimum deployment / retraction time required for the canopy to unfold / retract. Take during construction breaks ; Construct a parameter calculation model for the canopy system and calculate the canopy's opening and closing speed. ,in, This represents the top projected area. To minimize the time required for collection and dismantling, The effective width of the canopy is determined by the width of the building's top. Based on the speed of expansion and contraction, The average wind speed in the construction area; Based on the average wind speed in the construction area, the wind pressure load generated by the wind speed is summed with the internal construction micro-positive pressure generated by the internal construction to obtain the edge clamping force of the canopy; among which, the internal construction micro-positive pressure is taken as 50Pa based on the rising airflow of demolition dust. A track system is installed at the top of the steel column on the building roof, and is fixed to the steel structure with expansion bolts. Limiting devices are installed at both ends of the track. Install a double-layer dense mesh canopy, with an inner layer of dustproof mesh and an outer layer of windproof and sunproof mesh. An air layer is reserved between the two layers of mesh to improve the dustproof and noise reduction effect. The canopy drive system uses a variable frequency motor. The motor speed is adjusted by calculating the opening and closing speed of the canopy. The canopy is driven to move along the track through chain transmission, and an encoder is installed to monitor the opening and closing position in real time. Rubber sealing strips are installed at the edge of the canopy. The sealing strip clamping device uses an electric push rod, and the push rod force is adjusted by the edge clamping force of the canopy. For example, when the average wind speed in the construction area is ≥8m / s, the thrust is increased by 50% to ensure airtightness under extreme weather conditions; an emergency manual device for the canopy is installed so that the canopy can be opened and closed by hand-cranked gearbox in case of power failure or motor failure, and the hand-cranking speed meets the needs of emergency operations. After the canopy is completely closed, a laser rangefinder is used to check point by point to determine whether the top sealing gap is less than or equal to the preset sealing gap threshold. If the top sealing gap is less than or equal to the preset sealing gap threshold, it is marked as qualified. If the top sealing gap is greater than the preset sealing gap threshold, the unqualified part is adjusted by tightening the device. The unqualified part is adjusted by tightening the device to ensure that the dustproof and noise reduction efficiency meets the design requirements. Step 4: After the canopy system is deployed, the entire process is closed-loop controlled through multi-source sensing intelligent linkage and dynamic modeling optimization. Combined with temperature dynamic correction of dust concentration linkage threshold, a demolition priority model is constructed, mechanical power is dynamically adjusted, and the demolition sequence and intensity are optimized in real time to achieve the triple goals of dust suppression, vibration reduction and structure protection. In a specific embodiment, dust concentration sensors are deployed at various points in the construction area for pre-monitoring to obtain the maximum dust concentration. ,average value Set environmental protection standards and set limits. Temperature in the construction area was measured using a temperature sensor. Summer high temperatures pass Verification at 35℃; statistical analysis of the single-nozzle flow rate Q of the sprinkler system, measurement of the construction area volume V, and airflow velocity. Calculate dust diffusion time ; A model for calculating monitoring and linkage parameters was constructed. The number of monitoring points, n, was obtained by taking the ratio of the product of the maximum dust concentration and the volume of the measured construction area to the environmental protection standard limit and rounding it to the nearest integer. Combining environmental protection standards with dynamic calculations of dust concentration thresholds based on construction area temperature, the threshold is determined using the formula. Analysis yielded the dust concentration linkage threshold. ,in, This is a temperature correction factor. This is the standard reference temperature to prevent dust from spreading too quickly at high temperatures; Combining the obtained dust concentration linkage threshold with dust diffusion time and measured dust concentration Calculate the spray duration based on the nozzle flow rate. ,in, This refers to the number of spray nozzles; Monitoring points are arranged according to the calculated n value. The monitoring points are evenly distributed at the top, middle and bottom 1 / 3 of the construction area. The sensors are installed inside the protection system to avoid direct contact with the pollution source. The monitoring system pipeline network is laid out, and the pipeline is fixed along the channel steel support of the reinforcement system. It is arranged on separate sides from the sprinkler pipeline to avoid electromagnetic interference. Install the main and branch pipes of the sprinkler system, with the branch pipes evenly distributed along the protective system and the canopy system to ensure full coverage without blind spots; connect the PLC controller, input the sensor data into the controller, and set the dust concentration linkage threshold and the sprinkler duration. When the concentration at any monitoring point exceeds the dust concentration linkage threshold, the corresponding area sprinkler system will be automatically triggered to start. The system simulates excessive dust emissions by releasing a dust generator, and tests the response time of the spray system and the dust concentration within the preset detection period after spraying to ensure that they both meet the target range. The system also simulates temperature changes to verify the automatic threshold adjustment function, ensuring that the system is adaptable to different environmental conditions. The permissible vibration velocity of the retaining wall was measured using vibration sensors. By standardizing the allowable vibration speed of the fixed wall, wall cracking is prevented; and the dust concentration during demolition is monitored in real time through a monitoring system. With demolition noise ; Measure the dimensions of the original internal structural components (beams, columns, slabs), calculate the weight G of the components to be removed, detect the real-time stress σ of the remaining walls, and use strain gauges to attach them to the perimeter of openings and corners of the walls to convert them into stress values. Construct a demolition operation parameter optimization model, combine demolition dust concentration, demolition noise and allowable stress of the retained wall to analyze the priority of the demolition sequence, and carry out demolition mechanical operations according to the priority; The power of demolition machinery should be dynamically adjusted based on the allowable vibration velocity of the retained wall, the concentration of demolition dust, and the noise level during demolition. In the formula, represents the rated power of the machine. For real-time vibration velocity, In order to remove the dust concentration limit, To remove noise limits, ensure that power adjustments simultaneously meet vibration, dust, and noise restrictions; A demolition plan was developed by first proceeding from top to bottom, then from non-load-bearing to load-bearing, and from inside to outside, dividing the internal structure into several areas. Start the demolition machinery, including hydraulic hammers and breakers, and monitor the real-time vibration speed, dust concentration, noise level, and wall stress σ. After each area is demolished, the priority of subsequent demolition in that area is calculated, and the demolition order is adjusted to prioritize areas with higher priority values. If the priority is too low, demolition is suspended, and the reasons for exceeding the standards are analyzed. For example, if dust exceeds the standard, the spraying time is extended, and if vibration exceeds the standard, the mechanical power is reduced. During the demolition process, the power of the machinery is dynamically adjusted, and a spray system is installed at the entrance of the passage to wash the tires and body of vehicles before they leave to avoid secondary dust. After the demolition work is completed each day, the construction data, demolition area, number of times dust exceeds the standard, and number of times vibration exceeds the standard are statistically analyzed to optimize the demolition plan for the next day and ensure that the demolition work meets the requirements of structural safety, environmental protection standards, and controllable efficiency throughout the entire process.

[0011] Example 2: As Figure 2 As shown in the embodiment of the present invention, the Green Shield system for dust and noise reduction in in-situ building preservation and renovation specifically includes the following modules: Original structure treatment module: Treat the current building structure facade, remove some old and loose doors and windows, and fill the door and window openings with masonry or reinforce them with steel. Basic construction module: Excavate earthwork downwards along the wall, construct the wall beams, and pre-embed anchor bolts in the beams for connection to the superstructure; Reinforcement System Module: Connecting holes are drilled into the surface of the current structural wall. After drilling, connecting bolts are inserted. Once the concrete reaches the design strength, the steel structure reinforcement components are installed. Steel columns are installed on the outer side of the exterior wall, and lattice columns are installed on the inner side. The foundation beams are connected by pre-embedded anchor bolts, maintaining a gap with the wall. Channel steel is welded onto the steel structure, and holes are drilled in the channel steel. Connecting bolts are used to connect the inner lattice columns and the outer steel columns, jointly providing reinforcement to the wall surface. Protection system module: Install the outer cantilever frame and protection. The cantilever steel is welded to the column steel. Walkway panels are installed in the horizontal direction. Steel structure steps are installed in some vertical places for people to walk on. Cold-formed thin-walled rolled edge steel tie beams are welded to the upper part of the cantilever steel. The outer profiled steel sheet is connected and fixed to the steel tie beams with self-tapping screws to achieve facade protection. Skylight System Module: The skylight system has automatic opening and closing control functions. When closed, it achieves full coverage of the top of the building. The skylight adopts a double-layer dense mesh structure. Monitoring system module: Laying the pipeline network for the internal monitoring system and sprinkler system; Module removal: Except for retaining the wall structure, remove other original structural components inside.

[0012] The above provides a detailed description of one embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. The above formulas are all dimensionless numerical calculations, and the formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world situation. The preset parameters in the formulas are set by those skilled in the art based on actual conditions and historical experience, and can be adjusted according to actual conditions. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All equivalent changes and improvements made in accordance with the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A construction method for dust and noise reduction during the in-situ preservation and renovation of buildings, characterized in that: Includes the following steps: The building walls are inspected and evaluated, and the reinforcement adaptation coefficient of the openings is calculated in relation to the wall conditions to form a dynamic adjustment reinforcement plan; the bearing capacity of the foundation is tested, the upper load is counted, the spacing of the anchor bolts is calculated, and the construction space is dynamically balanced. The wall strength was tested and the material properties were confirmed. A dual-coupled calculation model was constructed. The layout was optimized by combining the coupled calculation of the wall structure gap and the torque of the tie bolts. The impact of background noise on the construction of the cantilever system was analyzed and the protection decision was dynamically optimized. The construction live load, sealing noise reduction coefficient and space requirements were correlated. Through multi-dimensional data-driven dynamic adaptation calculations, the current wall structure is precisely adapted for structural reinforcement, and the steel structure and canopy system are intelligently deployed. After the canopy system is deployed, it achieves closed-loop control of the entire process through multi-source sensor intelligent linkage and dynamic modeling optimization. Combined with temperature dynamic correction of dust concentration linkage threshold, it constructs a demolition priority model, dynamically adjusts mechanical power, and optimizes the demolition sequence and intensity in real time.

2. The dust and noise reduction construction method for in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for dynamically adjusting the reinforcement scheme is as follows: The compressive strength of the wall within a preset range around the opening was tested using a concrete rebound hammer. After removing outliers, the arithmetic mean was taken to obtain the measured compressive strength of the wall. The damage level of the opening is classified according to its degree of damage; a formula for calculating the reinforcement adaptation coefficient of the opening is constructed; the reinforcement adaptation coefficient of the opening is obtained by combining the measured average length and average width of the opening and the measured compressive strength of the wall; and the reinforcement method and parameters are dynamically adjusted. Remove all old and loose doors and windows with damaged openings, and reinforce them by filling them according to the opening reinforcement adaptation coefficient; adjust the reserved gap between the edge of the opening and the steel structure reinforcement components after the treatment.

3. The dust and noise reduction construction method for in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for dynamically balancing the construction space is as follows: The bearing capacity of the foundation was tested by plate load test, and the characteristic value of the bearing capacity of the foundation after stabilization was recorded and the average value was taken; the total load of the superstructure was calculated. A dual calculation model is constructed. The total load of the superstructure is combined with the product of the bolt stress reduction factor, the characteristic value of the foundation bearing capacity and the number of anchor bolts per meter. The arithmetic square root is then calculated to obtain the horizontal spacing of the anchor bolts. The excavation depth is determined by the sum of the foundation beam section height and the preset cushion layer thickness, and the anchor bolts are pre-embedded according to the horizontal spacing of the anchor bolts.

4. The dust and noise reduction construction method for in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for constructing the dual-coupled computational model is as follows: The actual compressive strength of the wall was tested using the core sampling method. Three core samples were selected from each wall surface, and the strength was tested after standard curing and the average value was taken. Check the steel structure material qualification certificates to obtain the yield strength of the steel columns and lattice columns, measure the outer diameter of the sprinkler system pipelines, and count the horizontal load of the steel structure reinforcement system. A dual-coupled calculation model is constructed by using the gaps in the wall structure to analyze and obtain the gaps in the wall structure; the tightening torque of the tie bolts is calculated by comprehensively considering the preset torque coefficient, safety factor, horizontal load, and gaps in the wall structure.

5. The dust and noise reduction construction method for in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for optimizing the layout is as follows: Based on the gaps in the wall structure, mark the drilling positions on the wall surface. After curing, use a pull-out test to check the anchoring force. If it fails, re-drill holes and re-insert the anchor. The outer steel column and the inner lattice column are fixed by pre-embedded anchor bolts and pre-tightened. Weld channel steel tie members between the steel columns and the lattice columns, install tie bolts and tighten them according to the tightening torque to form an overall load-bearing system; Spray pipe channels are reserved in the gaps of the wall structure, and the pipes are fixed by snap-on brackets, which are then welded to the steel structure.

6. The dust and noise reduction construction method for in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for dynamic adaptation calculation is as follows: The average wind speed in the construction area was measured using wind speed sensors, and the daily progress of internal demolition operations and the conventional demolition speed were statistically analyzed. The dustproof efficiency of the double-layer dense mesh netting was tested, the projected area of ​​the building top was measured, and the minimum opening and closing time of the canopy was determined in combination with the construction interval. A parameter calculation model of the canopy system was constructed to calculate the opening and closing speed of the canopy. The edge clamping force of the canopy was calculated in combination with wind pressure load and internal construction micro-positive pressure.

7. The dust and noise reduction construction method for in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for deploying the sky screen system is as follows: A track system is installed on the top of the steel column at the top of the building, and is fixed to the steel structure with expansion bolts. Limiting devices are installed at both ends of the track. A double-layer dense mesh canopy is installed, and a variable frequency motor is used as the canopy drive system. The motor speed is adjusted according to the opening and closing speed of the canopy, and the opening and closing position is monitored in real time. Rubber sealing strips are installed at the edges of the canopy, and the push rod force is dynamically adjusted according to the clamping force at the edge of the canopy; an emergency manual device for the canopy is configured; after the canopy is fully closed, a laser rangefinder is used to check the top sealing gap point by point. If the gap is greater than the preset threshold, the clamping device is adjusted until the dustproof and noise reduction design requirements are met.

8. The dust and noise reduction construction method for in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for closed-loop control throughout the entire process is as follows: Dust concentration sensors were deployed at various points in the construction area for pre-monitoring to obtain the maximum and average dust concentrations. Temperature sensors were used to measure the temperature in the construction area. The number of monitoring points was then calculated. Dynamically correct the dust concentration linkage threshold and calculate the spraying duration; evenly distribute monitoring points in the construction area, install sensors inside the protection system, and lay monitoring system pipelines and networks; Install the main and branch pipes of the sprinkler system and connect them to the PLC controller. When the dust concentration at any monitoring point exceeds the linkage threshold, the sprinkler system in the corresponding area will be automatically triggered to start. The dust generator was used to simulate excessive dust levels to verify the response time of the spray system and whether the dust concentration after spraying met the standards; the automatic threshold reduction function was verified by simulating temperature changes.

9. The construction method for dust and noise reduction in the in-situ preservation and renovation of buildings according to claim 1, characterized in that, The method for constructing the demolition priority model is as follows: Vibration sensors were used to measure the allowable vibration velocity of the retained wall, and the allowable vibration velocity limit of the wall was determined according to the specifications; the real-time stress of the retained wall was calculated; the dimensions of the original internal structural components were measured, and the weight of the components to be removed was calculated. A demolition priority model was constructed, using the ratio of demolition dust concentration, demolition noise, and real-time stress of the retained wall to the corresponding limit as input parameters to analyze and determine the demolition sequence priority. The demolition machinery operating power is dynamically adjusted based on the rated power of the machinery, real-time vibration speed, dust concentration limits, and noise limits. An initial demolition plan is formulated, and the internal structure is divided into several areas. After each area is demolished, the priority of subsequent areas is recalculated. If dust, vibration, or noise exceeds the standard, the demolition is suspended and the spraying time or machinery power is adjusted.

10. The Green Shield system for dust and noise reduction in in-situ building preservation and renovation according to claim 1, wherein the Green Shield system is used to perform the construction method according to any one of claims 1-9, characterized in that, include: Original structure treatment module: Treat the current building structure facade, remove some old and loose doors and windows, and fill the door and window openings with masonry or reinforce them with steel. Basic construction module: Excavate earthwork downwards along the wall, construct the wall beams, and pre-embed anchor bolts in the beams for connection to the superstructure; Reinforcement System Module: Connecting holes are drilled into the surface of the current structural wall. After drilling, connecting bolts are inserted. Once the concrete reaches the design strength, the steel structure reinforcement components are installed. Steel columns are installed on the outer side of the exterior wall, and lattice columns are installed on the inner side. The foundation beams are connected by pre-embedded anchor bolts, maintaining a gap with the wall. Channel steel is welded onto the steel structure, and holes are drilled in the channel steel. Connecting bolts are used to connect the inner lattice columns and the outer steel columns, jointly providing reinforcement to the wall surface. Protection system module: Install the outer cantilever frame and protection. The cantilever steel is welded to the column steel. Walkway panels are installed in the horizontal direction. Steel structure steps are installed in some vertical places for people to walk on. Cold-formed thin-walled rolled edge steel tie beams are welded to the upper part of the cantilever steel. The outer profiled steel sheet is connected and fixed to the steel tie beams with self-tapping screws to achieve facade protection. Skylight System Module: The skylight system has automatic opening and closing control functions. When closed, it achieves full coverage of the top of the building. The skylight adopts a double-layer dense mesh structure. Monitoring system module: Laying the pipeline network for the internal monitoring system and sprinkler system; Module removal: Except for retaining the wall structure, remove other original structural components inside.

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