Construction method of fabricated vibration isolation trench

Abstract

The invention discloses a construction method of an assembly type vibration isolation trench. The method comprises the following steps: firstly, designing and prefabricating a vibration isolation trench unit according to construction site conditions, underground water flow and vibration isolation requirements, including site analysis, size material determination, simulation optimization and quality inspection; before construction, field survey is carried out, topography and geology are covered, underground pipeline detection and vibration source analysis are carried out, the excavation path and depth are determined, and field preparation is made. And then digging a trench by using special equipment according to the design, controlling trench wall parameters and carrying out acceptance inspection. And then gravel and an anti-seepage film are sequentially laid at the bottom of the groove, and a drainage facility is additionally arranged according to needs so as to install a vibration isolation layer. The prefabricated units are lifted, adjusted and connected, then light materials are filled, then fine sand and geotechnical cloth are covered, and soil is recovered. And finally, adjusting and optimizing according to a result through vibration and acoustic testing. According to the method, through multiple layers of vibration isolation materials, firm connecting pieces and strict testing, the vibration isolation effect and stability are remarkably improved, and an effective scheme is provided for engineering vibration isolation.

Description

Technical Field

[0001] The invention relates to the field related to building construction, and in particular to a construction method of an assembled vibration isolation trench. Background Art

[0002] With the acceleration of urbanization, the distance between buildings is getting closer and closer, and the vibrations generated by various transportation and industrial activities have an increasingly serious impact on buildings. These vibrations not only affect the structural stability of buildings, but may also interfere with the daily lives of residents and even affect the normal use of precision instruments. Traditional vibration isolation trench construction methods mostly use on-site excavation and pouring concrete, which have problems such as long construction period, high cost, and difficult quality control, especially in the central area of ​​the city. Therefore, it is particularly necessary to develop an efficient prefabricated vibration isolation trench construction method. Summary of the invention

[0003] The object of the present invention is to provide a construction method of an assembled vibration isolation trench to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a construction method of an assembled vibration isolation trench, comprising the following steps:

[0005] Step 1: Design and prefabrication: According to the specific conditions of the construction site, groundwater flow conditions and vibration isolation requirements, design the structural dimensions and materials of the vibration isolation trench, select appropriate vibration isolation materials, and process and prefabricate the vibration isolation trench units in the factory to ensure that each unit has good vibration isolation performance;

[0006] Step 2: Site survey and preparation: Conduct detailed site survey before construction to determine the excavation path and depth of the vibration isolation trench, ensure that it will not affect existing underground facilities, and perform necessary site clearance and leveling work;

[0007] Step 3: Dig trenches: Use special mechanical equipment to dig trenches of predetermined depth and width according to the design drawings. During the digging process, pay attention to controlling the flatness and verticality of the trench wall to ensure that the vibration isolation trench unit can be installed smoothly;

[0008] Step 4: Install the vibration isolation layer: Lay a layer of isolation material at the bottom of the trench to improve the isolation effect of the vibration isolation trench and reduce groundwater erosion. If necessary, add drainage facilities on the vibration isolation layer to prevent water accumulation from affecting the vibration isolation performance.

[0009] Step 5: Install the vibration isolation trench unit: Hang the prefabricated vibration isolation trench units into the trench one by one, use special tools to adjust the position, ensure that the units fit tightly together to form a continuous vibration isolation belt, and each unit is firmly connected by embedded connectors and buckles;

[0010] Step 6, filling and fixing: After the vibration isolation trench units are installed, use lightweight filling materials to fill the gaps between the units to ensure the stability and integrity of the entire vibration isolation trench system, cover them with a layer of protective material, specifically fine sand and geotextile, and then restore the soil;

[0011] Step 7, testing and adjustment: Finally, the vibration isolation effect is tested, including but not limited to vibration experiments and acoustic tests. According to the test results, necessary adjustments and optimizations are made to the vibration isolation grooves to ensure the best vibration isolation effect.

[0012] Preferably, the specific steps of designing and prefabrication in step 1 are as follows:

[0013] Step 11: Site conditions and needs analysis: Through on-site survey, collect topographic and geological data of the construction site, including soil type, foundation bearing capacity, and groundwater level information; obtain the type, structural characteristics, and expected service life of the building; determine the direction, speed, and water content of groundwater flow through geological radar and borehole sampling;

[0014] Step 12: Design of vibration isolation groove

[0015] Structural dimensions: Groove depth: The groove is 1.5 meters to 3 meters, and the specific depth needs to be determined according to the groundwater flow conditions and the strength of the vibration source; Groove width: The width is 0.8 meters to 1.2 meters, and the convenience of installing the vibration isolation unit and filling the gap needs to be considered; Vibration isolation unit length: The length of a single vibration isolation unit is 2 meters to 5 meters;

[0016] Step 13: Material selection

[0017] Vibration isolation material: select one or more of rubber, foam plastic, polyurethane as the vibration isolation material; Connectors: select one or more of embedded connectors, buckles or bolts; Filling material: select lightweight filling material, specifically expanded polystyrene, foam plastic; Anti-seepage material: select anti-seepage membrane, sand and gravel material;

[0018] Step 14: Vibration isolation performance analysis: Use finite element analysis software to simulate and analyze the designed vibration isolation trench to evaluate its vibration isolation effect. Input key parameters such as soil type, vibration source frequency and amplitude, vibration isolation material performance, etc., and perform multiple iterations of optimization.

[0019] Step 15. Prefabricated vibration isolation unit: Design the mold of the vibration isolation unit according to the design drawings. For the rubber vibration isolation unit, adopt the vulcanization molding technology, pour the rubber material into the mold, and solidify it by heating and pressurizing. For the foam plastic vibration isolation unit, adopt the foaming molding technology, inject the foam plastic raw material into the mold, and expand and solidify it through chemical reaction. Perform quality inspection on each of the above prefabricated vibration isolation units, including size measurement, surface quality inspection, and vibration isolation performance test.

[0020] Preferably, the specific steps of the on-site survey and preparation in step 2 are as follows:

[0021] Step 21: Detailed site survey

[0022] Topographic and geological survey: Use drones for aerial photography and topographic mapping to obtain topographic maps of the construction site to understand the overall layout and topographic features of the site; use drilling sampling and geological radar to investigate the geological conditions of the construction site and record key parameters such as soil type, foundation bearing capacity, and groundwater level; use underground pipeline detectors to determine the location, depth, and direction of existing underground pipelines; vibration source analysis: Use vibration sensors and data acquisition systems to set up multiple detection points around the construction site to measure the vibration frequency, amplitude, and propagation direction of the vibration source, analyze vibration data, and determine the key layout position and length of the vibration isolation trench;

[0023] Step 22, determine the excavation path and depth of the vibration isolation trench: Based on the topographic map and geological data in step 21, select the most suitable excavation path of the vibration isolation trench, and ensure that the soil conditions on the path are suitable as the basis of the vibration isolation trench; determine the excavation depth of the vibration isolation trench according to the propagation depth of the vibration source and the groundwater flow conditions; for different types of vibration sources, determine the depth of the vibration isolation trench according to the following formula: traffic vibration: vibration isolation trench depth = 2 times the vibration wavelength, industrial vibration: vibration isolation trench depth = 1.5 times the vibration wavelength;

[0024] Step 23, on-site obstacle clearance and leveling: Mark the construction site in detail and mark the excavation range of the vibration isolation trench; use a bulldozer and grader to perform preliminary leveling on the construction site to ensure that the ground is basically flat and free of potholes; perform fine leveling on the excavation path and use a laser elevation meter to detect the ground elevation to ensure that the elevation is consistent; use a vibrating compactor to compact the leveled ground to increase the density of the soil and ensure soil stability during excavation;

[0025] Step 24, measurement and marking: Use a total station or GPS measuring instrument to accurately measure the excavation boundary line of the vibration isolation trench; use measuring stakes and marking lines to mark the excavation range of the vibration isolation trench to ensure that construction personnel are clear about the excavation path and depth.

[0026] Preferably, the specific steps of digging the trench in step 3 are as follows:

[0027] Step 31. According to the data and measurement marks in step 2, use an excavator to perform preliminary excavation. During the preliminary excavation, keep a certain margin to leave room for fine adjustment; use a trenching machine or a small excavator to make fine adjustments to the trench to ensure that the depth, width and shape of the trench meet the design requirements; use a laser level or level ruler to measure the bottom and side walls of the trench to ensure that the trench bottom is flat and the trench wall is vertical;

[0028] Step 32: Carefully check the depth, width, flatness and verticality of the trench to ensure that all parameters meet the design requirements; the project leader and site engineer shall conduct on-site acceptance to ensure that the trench quality meets the standards;

[0029] Step 33. During the excavation process, reconfirm the location of underground pipelines to ensure that these facilities will not be damaged during construction; use marking stakes or colored flags to mark underground pipelines to alert operators; if the excavation path of the vibration isolation trench conflicts with the underground pipelines, the excavation path should be adjusted in time or a detour design should be adopted.

[0030] Preferably, the specific steps of installing the vibration isolation layer in step 4 are as follows:

[0031] Step 41, laying gravel layer: lay a layer of gravel evenly at the bottom of the trench with a thickness of 100-200mm; use a vibrating roller or a portable vibrating rammer to compact the gravel layer to ensure the density and stability of the gravel layer; during the compaction process, it should be carried out in layers, and compaction should be carried out after laying each 100mm thick gravel layer until the designed thickness is reached; use a level ruler or a laser height gauge to check the flatness of the gravel layer to ensure that the flatness is within ±5mm;

[0032] Step 42, laying the anti-seepage membrane: lay the cut anti-seepage membrane on the compacted sand and gravel layer to ensure that the anti-seepage membrane is flat and has no wrinkles or bubbles; start laying from one end of the trench and gradually move toward the other end to avoid tearing or damage of the anti-seepage membrane; use a pressing tool to press the edge of the anti-seepage membrane to ensure that the edge is well sealed to prevent groundwater from seeping in; use wooden stakes or steel nails to fix the part of the anti-seepage membrane extending from the trench wall to ensure that the anti-seepage membrane is tightly combined with the trench wall; perform hot-melt welding or tape sealing on the joints to ensure that there is no leakage at the connection of the anti-seepage membrane;

[0033] Step 43. Add drainage facilities: Determine the location and number of drainage pipes according to design requirements; dig a small trench on the gravel layer and lay the drainage pipes in the trench, ensuring that the slope of the drainage pipes is 1% to 2%, and use sand or gravel to fill the gaps on both sides and above the drainage pipes to ensure that the drainage pipes are firmly fixed and will not be blocked; according to design requirements, install drainage gutters on the sides of the trench, usually with a width of 100-200mm and a depth of 50-100mm; dig a water collection well at an appropriate location in the trench; install a water pump or water collection tank in the water collection well to collect and discharge groundwater.

[0034] Preferably, the specific installation steps of installing the vibration isolation trench unit in step 5 are as follows:

[0035] Step 51, material preparation: prepare the prefabricated vibration isolation trench unit according to the design requirements; prepare suitable connecting parts;

[0036] Step 52, hoisting the vibration isolation trench unit: using a crane to slowly hoist the vibration isolation trench unit into the trench to prevent the unit from colliding with the trench wall and causing damage; after hoisting the vibration isolation trench unit to the predetermined position, use a level ruler and a plumb line to check the horizontality and verticality of the unit;

[0037] Step 53, position adjustment and fixation: Use a jack or adjustment tool to make fine adjustments to ensure that the position of each vibration isolation trench unit is accurate; fill the bottom and sides of the unit with sand or gravel, and use a vibrating rammer to compact the sand or gravel;

[0038] Step 54, connection between units: Use embedded connectors to fix the connection between adjacent units; select appropriate clips and install them at the connection between adjacent units; use sealant or waterproof tape to seal the connection between the vibration isolation groove units to prevent groundwater from infiltrating;

[0039] Step 55, forming a continuous vibration isolation belt: filling a proper amount of gravel or fine sand in the gaps between the vibration isolation trench units and between the units and the trench wall; compacting the filling material with a vibration rammer; and covering the top of the vibration isolation belt with a layer of protective material;

[0040] Step 56, final inspection and acceptance: Use a level ruler and laser height gauge to check the flatness of the vibration isolation belt to ensure that the flatness is within ±5mm; use pressure test or sealing test method to detect the sealing performance of the vibration isolation belt to ensure there is no leakage.

[0041] Preferably, the specific operation steps of filling and fixing in step 6 are as follows:

[0042] Step 61, filling the gaps between the units: Use a shovel to evenly pour the prepared lightweight filling material into the gaps between the vibration isolation trench units. During the filling process, compact the material layer by layer. After each 100 mm thick material is filled, use a vibration rammer to compact it.

[0043] Step 62, fixing the vibration isolation trench units: after the lightweight filling material is compacted, anchors or fixing piles are used between the vibration isolation trench units and on the trench wall for further fixing; the anchors are fixed to the trench wall using screws or steel nails;

[0044] Step 63, covering with protective materials: evenly lay a layer of fine sand with a thickness of 50-100 mm on the vibration isolation trench unit and the lightweight filling material; lay a layer of geotextile on the fine sand layer to ensure that the geotextile covers the entire vibration isolation trench area; use a vibration rammer to compact the fine sand and geotextile;

[0045] Step 64, restore the soil: fill the backfill soil evenly into the trench. After filling in 100-200mm thick backfill soil, use a vibrating rammer or compactor to compact it. Fill and compact layer by layer until the original ground height is restored. Use a level ruler or laser height gauge to check the flatness of the backfill soil to ensure that there are no obvious unevenness.

[0046] Compared with the prior art, the beneficial effects of the present invention are: significantly improving the vibration isolation effect, multi-layer filling materials: the present invention uses lightweight filling materials (such as foam plastics) to fill the gaps between the vibration isolation ditch units, and covers them with fine sand and geotextiles. The lightweight filling material has good vibration isolation performance and can effectively reduce vibration transmission, while the fine sand and geotextile play a secondary vibration isolation and protection role, ensuring the overall vibration isolation effect of the vibration isolation ditch system. Connectors and buckles: The vibration isolation ditch units are firmly connected together by embedded connectors and buckles to form a continuous vibration isolation belt, which improves the stability and vibration isolation effect of the system. Strict testing and adjustment: Finally, vibration experiments and acoustic tests are carried out, and the necessary adjustments and optimizations are made to the vibration isolation ditch according to the test results to ensure the best vibration isolation effect. This closed-loop test and adjustment method ensures the performance stability and reliability of the system;

[0047] Improve construction efficiency and quality, prefabricated vibration isolation trench units: Use prefabricated vibration isolation trench units to reduce the time and complexity of on-site construction. Prefabricated units undergo strict quality control to ensure that the size and performance of each unit meet the design requirements. Special tools: Use special adjustment tools (such as spirit levels, plumb lines, jacks, etc.) to make precise position adjustments to ensure the horizontality and verticality of each unit, thereby improving construction quality. Standardized construction process: Through detailed construction steps and standard technical parameter requirements, the construction process is standardized, construction errors and rework are reduced, and construction efficiency is improved;

[0048] The present invention significantly improves the vibration isolation effect and stability of the vibration isolation trench system through scientific construction methods, multi-layer filling materials, standardized processes and strict testing and adjustment. At the same time, the present invention shows excellent effects in construction efficiency, environmental protection, cost control, safety and applicability, and provides a reliable vibration isolation solution for various projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] See also Figure 1 The present invention provides a technical solution: a construction method of an assembled vibration isolation trench, comprising the following steps:

[0052] Step 1: Design and prefabrication: According to the specific conditions of the construction site, groundwater flow conditions and vibration isolation requirements, design the structural dimensions and materials of the vibration isolation trench, select appropriate vibration isolation materials, and process and prefabricate the vibration isolation trench units in the factory to ensure that each unit has good vibration isolation performance;

[0053] The specific steps of design and prefabrication are as follows:

[0054] Step 11: Site conditions and needs analysis: Through on-site survey, collect topographic and geological data of the construction site, including soil type, foundation bearing capacity, and groundwater level information; obtain the type, structural characteristics, and expected service life of the building; determine the direction, speed, and water content of groundwater flow through geological radar and borehole sampling;

[0055] Step 12: Design of vibration isolation groove

[0056] Structural dimensions: Groove depth: The groove is 1.5 meters to 3 meters, and the specific depth needs to be determined according to the groundwater flow conditions and the strength of the vibration source; Groove width: The width is 0.8 meters to 1.2 meters, and the convenience of installing the vibration isolation unit and filling the gap needs to be considered; Vibration isolation unit length: The length of a single vibration isolation unit is 2 meters to 5 meters;

[0057] Step 13: Material selection

[0058] Vibration isolation material: select one or more of rubber, foam plastic, polyurethane as the vibration isolation material; Connectors: select one or more of embedded connectors, buckles or bolts; Filling material: select lightweight filling material, specifically expanded polystyrene, foam plastic; Anti-seepage material: select anti-seepage membrane, sand and gravel material;

[0059] Step 14: Vibration isolation performance analysis: Use finite element analysis software to simulate and analyze the designed vibration isolation trench to evaluate its vibration isolation effect. Input key parameters such as soil type, vibration source frequency and amplitude, vibration isolation material performance, etc., and perform multiple iterations of optimization.

[0060] Step 15. Prefabricated vibration isolation unit: Design the mold of the vibration isolation unit according to the design drawings. For the rubber vibration isolation unit, adopt the vulcanization molding technology, pour the rubber material into the mold, and solidify it by heating and pressurizing. For the foam plastic vibration isolation unit, adopt the foaming molding technology, inject the foam plastic raw material into the mold, and expand and solidify it through chemical reaction. Perform quality inspection on each of the above prefabricated vibration isolation units, including size measurement, surface quality inspection, and vibration isolation performance test.

[0061] Step 2: Site survey and preparation: Conduct detailed site survey before construction to determine the excavation path and depth of the vibration isolation trench, ensure that it will not affect existing underground facilities, and perform necessary site clearance and leveling work;

[0062] The specific steps of site survey and preparation are as follows:

[0063] Step 21: Detailed site survey

[0064] Topographic and geological survey: Use drones for aerial photography and topographic mapping to obtain topographic maps of the construction site to understand the overall layout and topographic features of the site; use drilling sampling and geological radar to investigate the geological conditions of the construction site and record key parameters such as soil type, foundation bearing capacity, and groundwater level; use underground pipeline detectors to determine the location, depth, and direction of existing underground pipelines; vibration source analysis: Use vibration sensors and data acquisition systems to set up multiple detection points around the construction site to measure the vibration frequency, amplitude, and propagation direction of the vibration source, analyze vibration data, and determine the key layout position and length of the vibration isolation trench;

[0065] Step 22, determine the excavation path and depth of the vibration isolation trench: Based on the topographic map and geological data in step 21, select the most suitable excavation path of the vibration isolation trench, and ensure that the soil conditions on the path are suitable as the basis of the vibration isolation trench; determine the excavation depth of the vibration isolation trench according to the propagation depth of the vibration source and the groundwater flow conditions; for different types of vibration sources, determine the depth of the vibration isolation trench according to the following formula: traffic vibration: vibration isolation trench depth = 2 times the vibration wavelength, industrial vibration: vibration isolation trench depth = 1.5 times the vibration wavelength;

[0066] Step 23, on-site obstacle clearance and leveling: Mark the construction site in detail and mark the excavation range of the vibration isolation trench; use a bulldozer and grader to perform preliminary leveling on the construction site to ensure that the ground is basically flat and free of potholes; perform fine leveling on the excavation path and use a laser elevation meter to detect the ground elevation to ensure that the elevation is consistent; use a vibrating compactor to compact the leveled ground to increase the density of the soil and ensure soil stability during excavation;

[0067] Step 24, measurement and marking: Use a total station or GPS measuring instrument to accurately measure the excavation boundary line of the vibration isolation trench; use measuring stakes and marking lines to mark the excavation range of the vibration isolation trench to ensure that construction personnel are clear about the excavation path and depth.

[0068] Step 3: Dig trenches: Use special mechanical equipment to dig trenches of predetermined depth and width according to the design drawings. During the digging process, pay attention to controlling the flatness and verticality of the trench wall to ensure that the vibration isolation trench unit can be installed smoothly;

[0069] The specific steps for trench excavation are as follows:

[0070] Step 31. According to the data and measurement marks in step 2, use an excavator to perform preliminary excavation. During the preliminary excavation, keep a certain margin to leave room for fine adjustment; use a trenching machine or a small excavator to make fine adjustments to the trench to ensure that the depth, width and shape of the trench meet the design requirements; use a laser level or level ruler to measure the bottom and side walls of the trench to ensure that the trench bottom is flat and the trench wall is vertical;

[0071] Step 32: Carefully check the depth, width, flatness and verticality of the trench to ensure that all parameters meet the design requirements; the project leader and site engineer shall conduct on-site acceptance to ensure that the trench quality meets the standards;

[0072] Step 33. During the excavation process, reconfirm the location of underground pipelines to ensure that these facilities will not be damaged during construction; use marking stakes or colored flags to mark underground pipelines to alert operators; if the excavation path of the vibration isolation trench conflicts with the underground pipelines, the excavation path should be adjusted in time or a detour design should be adopted.

[0073] Step 4: Install the vibration isolation layer: Lay a layer of isolation material at the bottom of the trench to improve the isolation effect of the vibration isolation trench and reduce groundwater erosion. If necessary, add drainage facilities on the vibration isolation layer to prevent water accumulation from affecting the vibration isolation performance.

[0074] The specific steps for installing the vibration isolation layer are as follows:

[0075] Step 41, laying gravel layer: lay a layer of gravel evenly at the bottom of the trench with a thickness of 100-200mm; use a vibrating roller or a portable vibrating rammer to compact the gravel layer to ensure the density and stability of the gravel layer; during the compaction process, it should be carried out in layers, and compaction should be carried out after laying each 100mm thick gravel layer until the designed thickness is reached; use a level ruler or a laser height gauge to check the flatness of the gravel layer to ensure that the flatness is within ±5mm;

[0076] Step 42, laying the anti-seepage membrane: lay the cut anti-seepage membrane on the compacted sand and gravel layer to ensure that the anti-seepage membrane is flat and has no wrinkles or bubbles; start laying from one end of the trench and gradually move toward the other end to avoid tearing or damage of the anti-seepage membrane; use a pressing tool to press the edge of the anti-seepage membrane to ensure that the edge is well sealed to prevent groundwater from seeping in; use wooden stakes or steel nails to fix the part of the anti-seepage membrane extending from the trench wall to ensure that the anti-seepage membrane is tightly combined with the trench wall; perform hot-melt welding or tape sealing on the joints to ensure that there is no leakage at the connection of the anti-seepage membrane;

[0077] Step 43. Add drainage facilities: Determine the location and number of drainage pipes according to design requirements; dig a small trench on the gravel layer and lay the drainage pipes in the trench, ensuring that the slope of the drainage pipes is 1% to 2%, and use sand or gravel to fill the gaps on both sides and above the drainage pipes to ensure that the drainage pipes are firmly fixed and will not be blocked; according to design requirements, install drainage gutters on the sides of the trench, usually with a width of 100-200mm and a depth of 50-100mm; dig a water collection well at an appropriate location in the trench; install a water pump or water collection tank in the water collection well to collect and discharge groundwater.

[0078] Step 5: Install the vibration isolation trench unit: Hang the prefabricated vibration isolation trench units into the trench one by one, use special tools to adjust the position, ensure that the units fit tightly together to form a continuous vibration isolation belt, and each unit is firmly connected by embedded connectors and buckles;

[0079] The specific installation steps for installing the vibration isolation trench unit are as follows:

[0080] Step 51, material preparation: prepare the prefabricated vibration isolation trench unit according to the design requirements; prepare suitable connecting parts;

[0081] Step 52, hoisting the vibration isolation trench unit: using a crane to slowly hoist the vibration isolation trench unit into the trench to prevent the unit from colliding with the trench wall and causing damage; after hoisting the vibration isolation trench unit to the predetermined position, use a level ruler and a plumb line to check the horizontality and verticality of the unit;

[0082] Step 53, position adjustment and fixation: Use a jack or adjustment tool to make fine adjustments to ensure that the position of each vibration isolation trench unit is accurate; fill the bottom and sides of the unit with sand or gravel, and use a vibrating rammer to compact the sand or gravel;

[0083] Step 54, connection between units: Use embedded connectors to fix the connection between adjacent units; select appropriate clips and install them at the connection between adjacent units; use sealant or waterproof tape to seal the connection between the vibration isolation groove units to prevent groundwater from infiltrating;

[0084] Step 55, forming a continuous vibration isolation belt: filling a proper amount of gravel or fine sand in the gaps between the vibration isolation trench units and between the units and the trench wall; compacting the filling material with a vibration rammer; and covering the top of the vibration isolation belt with a layer of protective material;

[0085] Step 56, final inspection and acceptance: Use a level ruler and laser height gauge to check the flatness of the vibration isolation belt to ensure that the flatness is within ±5mm; use pressure test or sealing test method to detect the sealing performance of the vibration isolation belt to ensure there is no leakage.

[0086] Step 6, filling and fixing: After the vibration isolation trench units are installed, use lightweight filling materials to fill the gaps between the units to ensure the stability and integrity of the entire vibration isolation trench system, cover them with a layer of protective material, specifically fine sand and geotextile, and then restore the soil;

[0087] The specific steps for filling and fixing are as follows:

[0088] Step 61, filling the gaps between the units: Use a shovel to evenly pour the prepared lightweight filling material into the gaps between the vibration isolation trench units. During the filling process, compact the material layer by layer. After each 100 mm thick material is filled, use a vibration rammer to compact it.

[0089] Step 62, fixing the vibration isolation trench units: after the lightweight filling material is compacted, anchors or fixing piles are used between the vibration isolation trench units and on the trench wall for further fixing; the anchors are fixed to the trench wall using screws or steel nails;

[0090] Step 63, covering with protective materials: evenly lay a layer of fine sand with a thickness of 50-100 mm on the vibration isolation trench unit and the lightweight filling material; lay a layer of geotextile on the fine sand layer to ensure that the geotextile covers the entire vibration isolation trench area; use a vibration rammer to compact the fine sand and geotextile;

[0091] Step 64, restore the soil: fill the backfill soil evenly into the trench. After filling in 100-200mm thick backfill soil, use a vibrating rammer or compactor to compact it. Fill and compact layer by layer until the original ground height is restored. Use a level ruler or laser height gauge to check the flatness of the backfill soil to ensure that there are no obvious unevenness.

[0092] Step 7, testing and adjustment: Finally, the vibration isolation effect is tested, including but not limited to vibration experiments and acoustic tests. According to the test results, necessary adjustments and optimizations are made to the vibration isolation grooves to ensure the best vibration isolation effect.

[0093] The specific construction is:

[0094] Site preparation: Place warning signs in the construction area to ensure safety; use measuring tools to accurately mark the boundary lines of the vibration isolation trench to guide excavation work.

[0095] Trench excavation: Use an excavator to excavate along the marked line to the specified depth, and trim the side walls of the trench to make it straight. During the excavation process, be careful not to damage the existing underground pipelines.

[0096] Install the vibration isolation layer: lay a layer of sand and gravel with a thickness of about 10 cm at the bottom of the excavated trench, or choose other suitable anti-seepage materials according to the actual situation. Install drainage pipes when necessary to ensure that the vibration isolation trench has good drainage function.

[0097] Hoisting unit: Use a crane to lift the prefabricated vibration isolation trench units into the trench one by one. Use designed connectors to fix each section of the unit to ensure good sealing at the joints and a stable overall structure.

[0098] Filling and covering: Use foam plastic or fine sand to fill the gaps between the units, making sure the filling material is full and compacted. After that, cover with a layer of geotextile and fine sand to protect the vibration isolation trench units from external factors.

[0099] Completion acceptance: After the construction is completed, a third-party testing agency is invited to conduct a comprehensive inspection of the vibration isolation trench, including vibration isolation performance test, structural strength test, etc., to ensure that the construction quality meets national standards and design requirements.

[0100] The use of the assembled vibration isolation trench construction method of the present invention not only greatly shortens the construction time and reduces the construction cost, but also improves the construction efficiency and the quality of the vibration isolation trench. The prefabricated vibration isolation trench unit can better adapt to various complex underground conditions, thereby ensuring the safety of construction and the stability of later use. In addition, the method is also easy to disassemble and reuse, which conforms to the concept of environmental protection and sustainable development.

[0101] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction method for an assembled vibration isolation trench, characterized in that: The following steps are involved: Step 1: Design and prefabrication: According to the specific conditions of the construction site, groundwater flow conditions and vibration isolation requirements, design the structural dimensions and materials of the vibration isolation trench, select appropriate vibration isolation materials, and process and prefabricate the vibration isolation trench units in the factory to ensure that each unit has good vibration isolation performance; Step 2: Site survey and preparation: Conduct detailed site survey before construction to determine the excavation path and depth of the vibration isolation trench, ensure that it will not affect existing underground facilities, and perform necessary site clearance and leveling work; Step 3: Dig trenches: Use special mechanical equipment to dig trenches of predetermined depth and width according to the design drawings. During the digging process, pay attention to controlling the flatness and verticality of the trench wall to ensure that the vibration isolation trench unit can be installed smoothly; Step 4: Install the vibration isolation layer: Lay a layer of isolation material at the bottom of the trench to improve the isolation effect of the vibration isolation trench and reduce groundwater erosion. If necessary, add drainage facilities on the vibration isolation layer to prevent water accumulation from affecting the vibration isolation performance. Step 5: Install the vibration isolation trench unit: Hang the prefabricated vibration isolation trench units into the trench one by one, use special tools to adjust the position, ensure that the units fit tightly together to form a continuous vibration isolation belt, and each unit is firmly connected by embedded connectors and buckles; Step 6, filling and fixing: After the vibration isolation trench units are installed, use lightweight filling materials to fill the gaps between the units to ensure the stability and integrity of the entire vibration isolation trench system, cover them with a layer of protective material, specifically fine sand and geotextile, and then restore the soil; Step 7, testing and adjustment: Finally, the vibration isolation effect is tested, including but not limited to vibration experiments and acoustic tests. According to the test results, necessary adjustments and optimizations are made to the vibration isolation grooves to ensure the best vibration isolation effect.

2. The construction method of an assembled vibration isolation trench according to claim 1, characterized in that: The specific steps of design and prefabrication in step 1 are as follows: Step 11: Site conditions and needs analysis: Through on-site survey, collect topographic and geological data of the construction site, including soil type, foundation bearing capacity, and groundwater level information; obtain the type, structural characteristics, and expected service life of the building; determine the direction, speed, and water content of groundwater flow through geological radar and borehole sampling; Step 12: Design of vibration isolation groove Structural dimensions: Groove depth: The groove is 1.5 meters to 3 meters, and the specific depth needs to be determined according to the groundwater flow conditions and the strength of the vibration source; Groove width: The width is 0.8 meters to 1.2 meters, and the convenience of installing the vibration isolation unit and filling the gap needs to be considered; Vibration isolation unit length: The length of a single vibration isolation unit is 2 meters to 5 meters; Step 13: Material selection Vibration isolation material: The vibration isolation material can be selected from one or more of rubber, foam plastic, and polyurethane; Connectors: choose one or more of embedded connectors, buckles or bolts; Filling materials: choose lightweight filling materials, specifically expanded polystyrene, foam plastics; Anti-seepage materials: choose anti-seepage membranes, sand and gravel materials; Step 14: Vibration isolation performance analysis: Use finite element analysis software to simulate and analyze the designed vibration isolation trench to evaluate its vibration isolation effect. Input key parameters such as soil type, vibration source frequency and amplitude, vibration isolation material performance, etc., and perform multiple iterations of optimization. Step 15. Prefabricated vibration isolation unit: Design the mold of the vibration isolation unit according to the design drawings. For the rubber vibration isolation unit, adopt the vulcanization molding technology, pour the rubber material into the mold, and solidify it by heating and pressurizing. For the foam plastic vibration isolation unit, adopt the foaming molding technology, inject the foam plastic raw material into the mold, and expand and solidify it through chemical reaction. Perform quality inspection on each of the above prefabricated vibration isolation units, including size measurement, surface quality inspection, and vibration isolation performance test.

3. The construction method of an assembled vibration isolation trench according to claim 1, characterized in that: The specific steps of the on-site survey and preparation in step 2 are as follows: Step 21: Detailed site survey Topographic and geological survey: Use drones for aerial photography and topographic mapping to obtain topographic maps of the construction site to understand the overall layout and topographic features of the site; use drilling sampling and geological radar to investigate the geological conditions of the construction site and record key parameters such as soil type, foundation bearing capacity, and groundwater level; use underground pipeline detectors to determine the location, depth, and direction of existing underground pipelines; vibration source analysis: Use vibration sensors and data acquisition systems to set up multiple detection points around the construction site to measure the vibration frequency, amplitude, and propagation direction of the vibration source, analyze vibration data, and determine the key layout position and length of the vibration isolation trench; Step 22, determine the excavation path and depth of the vibration isolation trench: Based on the topographic map and geological data in step 21, select the most suitable excavation path of the vibration isolation trench, and ensure that the soil conditions on the path are suitable as the basis of the vibration isolation trench; determine the excavation depth of the vibration isolation trench according to the propagation depth of the vibration source and the groundwater flow conditions; for different types of vibration sources, determine the depth of the vibration isolation trench according to the following formula: traffic vibration: vibration isolation trench depth = 2 times the vibration wavelength, industrial vibration: vibration isolation trench depth = 1.5 times the vibration wavelength; Step 23, on-site obstacle clearance and leveling: Mark the construction site in detail and mark the excavation range of the vibration isolation trench; use a bulldozer and grader to perform preliminary leveling on the construction site to ensure that the ground is basically flat and free of potholes; perform fine leveling on the excavation path and use a laser elevation meter to detect the ground elevation to ensure that the elevation is consistent; use a vibrating compactor to compact the leveled ground to increase the density of the soil and ensure soil stability during excavation; Step 24, measurement and marking: Use a total station or GPS measuring instrument to accurately measure the excavation boundary line of the vibration isolation trench; use measuring stakes and marking lines to mark the excavation range of the vibration isolation trench to ensure that construction personnel are clear about the excavation path and depth.

4. The construction method of an assembled vibration isolation trench according to claim 1, characterized in that: The specific steps of trenching in step 3 are as follows: Step 31. According to the data and measurement marks in step 2, use an excavator to perform preliminary excavation. During the preliminary excavation, keep a certain margin to leave room for fine adjustment; use a trenching machine or a small excavator to make fine adjustments to the trench to ensure that the depth, width and shape of the trench meet the design requirements; use a laser level or level ruler to measure the bottom and side walls of the trench to ensure that the trench bottom is flat and the trench wall is vertical; Step 32: Carefully check the depth, width, flatness and verticality of the trench to ensure that all parameters meet the design requirements; the project leader and site engineer shall conduct on-site acceptance to ensure that the trench quality meets the standards; Step 33: During the excavation process, reconfirm the location of underground pipelines to ensure that these facilities will not be damaged during construction; Use marking stakes or colored flags to mark underground pipelines to alert operators; if the excavation path of the vibration isolation trench conflicts with the underground pipeline, the excavation path should be adjusted in time or a detour design should be adopted.

5. The construction method of an assembled vibration isolation trench according to claim 1, characterized in that: The specific steps for installing the vibration isolation layer in step 4 are as follows: Step 41, laying gravel layer: lay a layer of gravel evenly at the bottom of the trench with a thickness of 100-200mm; use a vibrating roller or a portable vibrating rammer to compact the gravel layer to ensure the density and stability of the gravel layer; during the compaction process, it should be carried out in layers, and compaction should be carried out after laying each 100mm thick gravel layer until the designed thickness is reached; use a level ruler or a laser height gauge to check the flatness of the gravel layer to ensure that the flatness is within ±5mm; Step 42, laying the anti-seepage membrane: lay the cut anti-seepage membrane on the compacted sand and gravel layer to ensure that the anti-seepage membrane is flat and has no wrinkles or bubbles; start laying from one end of the trench and gradually move toward the other end to avoid tearing or damage of the anti-seepage membrane; use a pressing tool to press the edge of the anti-seepage membrane to ensure that the edge is well sealed to prevent groundwater from seeping in; use wooden stakes or steel nails to fix the part of the anti-seepage membrane extending from the trench wall to ensure that the anti-seepage membrane is tightly combined with the trench wall; perform hot-melt welding or tape sealing on the joints to ensure that there is no leakage at the connection of the anti-seepage membrane; Step 43. Add drainage facilities: Determine the location and number of drainage pipes according to design requirements; dig a small trench on the gravel layer and lay the drainage pipes in the trench, ensuring that the slope of the drainage pipes is 1% to 2%, and use sand or gravel to fill the gaps on both sides and above the drainage pipes to ensure that the drainage pipes are firmly fixed and will not be blocked; according to design requirements, install drainage gutters on the sides of the trench, usually with a width of 100-200mm and a depth of 50-100mm; dig a water collection well at an appropriate location in the trench; install a water pump or water collection tank in the water collection well to collect and discharge groundwater.

6. The construction method of an assembled vibration isolation trench according to claim 1, characterized in that: The specific installation steps for installing the vibration isolation trench unit in step 5 are as follows: Step 51, material preparation: prepare the prefabricated vibration isolation trench unit according to the design requirements; prepare suitable connecting parts; Step 52, hoisting the vibration isolation trench unit: using a crane to slowly hoist the vibration isolation trench unit into the trench to prevent the unit from colliding with the trench wall and causing damage; after hoisting the vibration isolation trench unit to the predetermined position, use a level ruler and a plumb line to check the horizontality and verticality of the unit; Step 53, position adjustment and fixation: Use a jack or adjustment tool to make fine adjustments to ensure that the position of each vibration isolation trench unit is accurate; fill the bottom and sides of the unit with sand or gravel, and use a vibration rammer to compact the sand or gravel; Step 54, connection between units: Use embedded connectors to fix the connection between adjacent units; select appropriate clips and install them at the connection between adjacent units; use sealant or waterproof tape to seal the connection between the vibration isolation groove units to prevent groundwater from seeping in; Step 55, forming a continuous vibration isolation belt: filling a proper amount of gravel or fine sand in the gaps between the vibration isolation trench units and between the units and the trench wall; compacting the filling material with a vibration rammer; and covering the top of the vibration isolation belt with a layer of protective material; Step 56, final inspection and acceptance: Use a level ruler and laser height gauge to check the flatness of the vibration isolation belt to ensure that the flatness is within ±5mm; use pressure test or sealing test method to detect the sealing performance of the vibration isolation belt to ensure there is no leakage.

7. The construction method of an assembled vibration isolation trench according to claim 1, characterized in that: The specific operation steps of filling and fixing in step 6 are as follows: Step 61, filling the gaps between the units: Use a shovel to evenly pour the prepared lightweight filling material into the gaps between the vibration isolation trench units. During the filling process, compact the material layer by layer. After each 100 mm thick material is filled, use a vibration rammer to compact it. Step 62, fixing the vibration isolation trench units: after the lightweight filling material is compacted, anchors or fixing piles are used between the vibration isolation trench units and on the trench wall for further fixing; Use screws or nails to fix the anchors to the trench wall; Step 63, covering with protective materials: evenly lay a layer of fine sand with a thickness of 50-100 mm on the vibration isolation trench unit and the lightweight filling material; lay a layer of geotextile on the fine sand layer to ensure that the geotextile covers the entire vibration isolation trench area; use a vibration rammer to compact the fine sand and geotextile; Step 64, restore the soil: fill the backfill soil evenly into the trench. After filling in 100-200mm thick backfill soil, use a vibrating rammer or compactor to compact it. Fill and compact layer by layer until the original ground height is restored. Use a level ruler or laser height gauge to check the flatness of the backfill soil to ensure that there are no obvious unevenness.

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