Construction method of hydraulic vibration flat rammer for foundation replacement with artificial marble waste

Abstract

The application discloses a construction method of artificial marble waste as foundation replacement hydraulic vibration flat-plate rammer construction, and belongs to the technical field of foundation construction. The method comprises the following steps: cleaning and leveling the original soil of the foundation; incoming inspection of the artificial marble waste; layering and paving the waste, with the thickness of each layer being 200mm-300mm; controlling the water content of the filling material within the preset water content wg±2%; performing multi-pass vibration compaction by using a hydraulic vibration flat-plate rammer, and spraying water to keep the water content within the preset range during the compaction process; detecting the compaction degree after the rolling is completed, locally reinforcing the edges and areas that are not in place, and stopping until the compaction coefficient λc is not less than 0.95; after checking that the surface of the compacted foundation meets the requirements, the next layer of filling is performed; and the layering, compaction and detection are repeated until the design elevation is reached. The application can effectively improve the compaction quality and bearing capacity of the foundation, reduce the foundation settlement, and realize the resource utilization of the artificial marble waste.

Description

Technical Field

[0001] This invention relates to the field of foundation construction technology, and in particular to a hydraulic vibratory plate compaction method for using artificially manufactured marble waste as foundation replacement material. Background Technology

[0002] Artificial marble manufacturing waste refers to the powdery solid waste generated during the production of resin-based artificial marble, using unsaturated polyester resin as a binder and calcite, marble, limestone, and other carbonate fragments and powders as the main raw materials, as well as during subsequent cutting and processing. This type of waste is typically settled in sedimentation tanks, drained, and pressed to form a powdery substance, often referred to as artificial marble waste or artificial calcium carbonate waste. Currently, there is a lack of effective disposal methods for this type of waste, with open-air stockpiling and on-site landfill being the main methods. This not only occupies a large amount of land resources but also pollutes and harms the surrounding environment. Despite this, because the properties of marble solid waste are not fully understood, many companies are hesitant to reuse the waste due to a lack of comprehensive knowledge. Therefore, how to effectively utilize marble solid waste has become an important issue that urgently needs to be addressed.

[0003] Studies on the basic mechanical properties of artificially manufactured marble waste have shown that, under specific moisture content and compaction conditions, this material can achieve high compaction and bearing capacity, demonstrating its potential as a foundation replacement material. Therefore, using it for foundation replacement not only achieves the resource utilization of waste but also solves related treatment challenges.

[0004] Vibratory compaction technology is widely used in foundation replacement construction, with the core purpose of improving the density and bearing capacity of the foundation. During construction, a hydraulic vibratory plate compactor is used to repeatedly compact the replacement soil. Through the combined action of vibration waves and excitation force, air inside the material is expelled, and particles are rearranged, thereby increasing density and bearing capacity, and improving the stability of the foundation. The hydraulic vibratory plate compactor is powered by high-pressure oil output from an excavator, driving a hydraulic motor to rotate. The motor drives an internal eccentric shaft to rotate synchronously. The eccentric shaft has an asymmetrical mass distribution, and during high-speed rotation, it continuously generates alternating centrifugal force, forming high-frequency vibration, typically 40–45 Hz. Under the combined action of vibration and the equipment's own weight, this high-frequency vibration acts on the surface of the fill soil. The high-frequency vibration breaks down the cohesion and friction between soil particles, causing the particles to rearrange and fill the gaps, reducing soil porosity and increasing density and bearing capacity.

[0005] The compaction effect is closely related to the moisture content of the filler. When the moisture content is too low, the frictional resistance between particles is high, making compaction difficult. A moderate moisture content acts as a lubricant, facilitating compaction. When the moisture content is too high, a thick water film forms on the particle surface, weakening the direct contact and pressure transmission between particles. This causes the compaction energy to be buffered by the water film, making particles prone to sliding rather than being tightly packed, resulting in a "rubber soil" phenomenon and a decrease in compaction effect. Therefore, compaction operations need to control the moisture content near its optimal value. The optimal moisture content refers to the moisture content corresponding to the filler reaching its maximum dry density under a specific compaction energy. The optimal moisture content varies for different types of soil. Compaction tests on artificial marble waste show that its optimal moisture content is approximately 18%.

[0006] In summary, research on the hydraulic vibratory plate compaction construction method for artificial marble waste in foundation replacement, taking into account its unique physical and mechanical properties, has significant engineering application value. Summary of the Invention

[0007] The purpose of this invention is to provide a construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compaction, so as to solve the problems existing in the prior art.

[0008] To achieve the above objectives, this invention provides a hydraulic vibratory plate compaction construction method for using artificial marble waste as foundation replacement, comprising the following steps: cleaning and leveling the original soil of the foundation site to be filled; re-inspecting the artificial marble waste upon arrival to control the impurity content; spreading the re-inspected and qualified artificial marble waste according to the principle of layered filling, with each layer having a thickness of 200mm-300mm; controlling the moisture content of the filler within the preset moisture content wg±2% range; performing multiple passes of vibration compaction, and simultaneously sprinkling water during the compaction process to maintain the moisture content of the filler within the preset moisture content wg±2% range; after compaction, testing the compaction degree, and locally compacting and reinforcing the edges and areas that are not properly compacted until the compaction coefficient λc≥0.95; after checking that the compacted foundation surface meets the preset construction requirements, then proceeding with the next layer of filling; repeating layered filling, compaction, and testing until the design elevation is reached.

[0009] Preferably, the waste material from artificial marble manufacturing undergoes an on-site re-inspection, with a minimum size of 100m³. 3 The sample was taken to test the impurity content of a batch, including plastic, wood chips, and metal scraps.

[0010] Preferably, the multiple vibration compaction is performed using a hydraulic vibratory plate compactor. The hydraulic vibratory plate compactor is driven by high-pressure oil output from the excavator, which drives a hydraulic motor to rotate. The hydraulic motor drives an internal eccentric shaft to rotate synchronously. When the eccentric shaft rotates at high speed, it continuously generates alternating centrifugal force, forming high-frequency vibration. Under the combined action of vibration and the equipment's own weight, the fill material is compacted.

[0011] Preferably, the hydraulic vibratory plate compactor is used for compaction with an excitation force of 100KN, a vibration frequency of 40Hz to 45Hz, and 2 to 4 compaction passes.

[0012] Preferably, during the multiple vibration compaction cycles, adjacent compaction plates overlap by one-third to one-half of the plate width.

[0013] Preferably, controlling the moisture content of the filler within a preset moisture content wg ± 2% specifically includes: using a water truck to uniformly spray water on the paved filler layer, and using a rapid moisture content detector to monitor the moisture content of the filler in real time. When the moisture content is lower than the preset range, watering continues to increase humidity; when the moisture content is higher than the preset range, the filler is turned over or replaced. The preset moisture content wg is predetermined to be 18% through an indoor standard compaction test.

[0014] Preferably, the re-inspected and qualified artificial marble waste is spread according to the principle of layered filling, specifically including: using dump trucks to transport the inspected and qualified artificial marble waste to the filling area, and using bulldozers or graders to initially spread and level it along the longitudinal direction of the roadbed, so that the filling layer has a uniform thickness and a flat surface.

[0015] Preferably, the compaction coefficient λc is the ratio of the controlled dry density of the filler obtained by field testing to the maximum dry density obtained by indoor compaction test, and the compaction standard is λc≥0.95.

[0016] Preferably, the compaction degree test after the rolling is completed specifically includes: using a sand cone method testing device to test the compaction degree of each layer of the compacted foundation, with the sampling locations evenly distributed within the subgrade area of ​​each layer, and at least 3 points tested per 1000m².

[0017] Preferably, the compaction degree is tested after the rolling is completed, specifically including: using a light dynamic penetrometer for testing, the testing standard being that within a penetration depth of 30cm, the number of hammer blows in any three consecutive tests is not less than 38.

[0018] Preferably, local compaction and reinforcement are carried out on the edges and areas that are not compacted properly. Specifically, this includes: reinforcing the foundation edges, corner areas that cannot be entered by the hydraulic vibratory plate compactor, and other local areas that fail the test by using a small manual vibratory plate compactor. The thickness of the reinforcing filler shall not exceed 150mm, and the number of compaction passes shall not be less than 4, until the compaction degree meets λc≥0.95.

[0019] Preferably, during construction, temporary drainage ditches are excavated around the filling area, and work is stopped on rainy days, with the spread or compacted waste material layer covered with tarpaulin.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects: This invention provides a hydraulic vibratory plate compaction method for foundation replacement using manufactured marble waste. By precisely controlling the moisture content of the manufactured marble waste during the compaction process and maintaining it within the optimal moisture content range of wg ± 2%, it effectively solves the technical problem of poor compaction performance caused by the resin content and fine powder particles of manufactured marble waste, which are sensitive to moisture content. When the moisture content is too low, the frictional resistance between waste particles is large, making compaction difficult; when the moisture content is too high, a thick bound water film forms on the surface of the waste particles, making it difficult for external compaction loads to be transmitted through direct contact and friction between particles. A large amount of compaction energy is consumed in overcoming the lubrication and flow of water, resulting in a "playdough" effect. This invention controls the moisture content near the optimal range, utilizing the lubricating effect of water to reduce the internal friction between particles, enabling the waste to achieve the most economical compaction effect and the maximum density during vibratory compaction. Meanwhile, this construction method uses a 15-ton excavator paired with a VC10D model plate compactor as the main compaction machinery, employing a 100KN vibration force for compaction. Through the combined effect of high-frequency vibration and static pressure, the internal friction and interlocking force between waste particles are effectively reduced, allowing the particles to rearrange and interlock, with small particles fully filling the gaps between large particles while expelling air from between particles. This method is more effective than simple static compaction. Furthermore, this invention uses sand cone testing or light dynamic penetration testing to detect the compaction degree of each compacted subgrade layer, with a compaction standard of λc ≥ 0.95, ensuring that the compaction quality and bearing capacity of each subgrade layer meet design requirements. For areas where compaction is insufficient, small compaction equipment is used for reinforcement, ensuring uniform compaction of the entire foundation replacement soil, with no weak or blind spots. The construction method of this invention is simple to operate, fast to construct, and highly efficient; 2 to 4 passes with a hydraulic vibratory plate compactor are sufficient to meet the requirements, and the cost is relatively low. At the same time, this method can realize the resource utilization of artificial marble manufacturing waste, solve the environmental problems such as land occupation and water pollution caused by the random dumping of such waste, and has significant economic and social benefits. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0022] Figure 1 This is a graph showing the maximum compacted dry density of the artificially manufactured marble waste as a function of moisture content.

[0023] Figure 2 This is a curve showing the change in compaction degree of artificially manufactured marble waste as a function of bearing capacity characteristic value.

[0024] Figure 3 This is a comparison chart of the load-settlement curves of artificially manufactured marble waste as foundation replacement material and undisturbed red clay soil, used in this invention.

[0025] Figure 4 This is a comparison chart of the load-settlement curves of artificially manufactured marble waste as foundation replacement material, and coal gangue and fly ash.

[0026] Figure 5 This is a flowchart of the construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor, as per the present invention. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 5 As shown, this invention provides a hydraulic vibratory plate compaction construction method for using artificial marble waste as foundation replacement, comprising the following steps: cleaning and leveling the original soil of the foundation site to be filled; re-inspecting the artificial marble waste upon arrival to control the impurity content; spreading the qualified artificial marble waste in layers according to the principle of layered filling, with each layer having a thickness of 200mm-300mm; controlling the moisture content of the filler within the preset moisture content wg±2% range; performing multiple passes of vibration compaction, and spraying water during the compaction process to maintain the moisture content of the filler within the preset moisture content wg±2% range; after compaction, testing the compaction degree, and locally compacting and reinforcing the edges and areas that are not compacted properly until the compaction coefficient λc≥0.95; after checking that the compacted foundation surface meets the preset construction requirements, then laying the next layer; repeating layered filling, compaction, and testing until the design elevation is reached.

[0029] This invention can effectively improve the quality and bearing capacity of foundation compaction, reduce foundation settlement, and realize the resource utilization of artificial marble waste. It solves the technical problems of difficult disposal of artificial marble waste, environmental pollution, and insufficient resource utilization of foundation replacement materials in the prior art.

[0030] To further optimize the scheme, a hydraulic vibratory plate compactor was adopted for multiple rounds of vibration compaction. The hydraulic vibratory plate compactor is driven by high-pressure oil output from the excavator, which drives the hydraulic motor to rotate. The hydraulic motor drives the internal eccentric shaft to rotate synchronously. When the eccentric shaft rotates at high speed, it continuously generates alternating centrifugal force, forming high-frequency vibration. Under the dual action of vibration and the equipment's own weight, the fill material is compacted.

[0031] The above settings can effectively reduce the internal friction and interlocking force between filler particles, allowing the particles to rearrange and interlock with each other. Small particles fully fill the gaps between large particles while expelling air from between particles, thereby improving the compactness and load-bearing capacity of the filler.

[0032] The scheme was further optimized so that the hydraulic vibratory plate compactor was used to compact the surface with an excitation force of 100KN, a vibration frequency of 40Hz to 45Hz, and 2 to 4 passes of vibration compaction.

[0033] With the above settings, the filler can achieve the best compaction effect under the action of appropriate frequency and excitation force. Low amplitude and high frequency vibration can keep the material in a continuous "activated state", producing a dynamic kneading and squeezing action of "impact-release-re-impact", which effectively eliminates the shear stress between particles and internal voids, improving construction efficiency and reducing construction costs while ensuring compaction quality.

[0034] To further optimize the scheme, when performing multiple rounds of vibration compaction, adjacent compaction plates should overlap by one-third to one-half of their width.

[0035] The above settings ensure that there are no blind spots in compaction across the entire surface, avoid uneven compaction caused by missed compaction, guarantee uniform compaction across the entire foundation cross section, and eliminate weak compaction zones.

[0036] Further optimization of the scheme, controlling the moisture content of the filler within the preset moisture content wg ± 2%, specifically includes: using a water truck to uniformly spray water on the paved filler layer, and using a rapid moisture content detector to monitor the moisture content of the filler in real time. When the moisture content is lower than the preset range, continue to spray water to increase humidity; when the moisture content is higher than the preset range, turn over and dry or replace the filler. The preset moisture content wg is predetermined to be 20% through indoor standard compaction tests.

[0037] By utilizing the above settings, the lubricating effect of water is used to reduce the internal friction between particles, enabling the waste material to achieve the most economical compaction effect and the maximum density during vibration rolling, thus avoiding a decline in compaction quality due to improper moisture content.

[0038] The plan was further optimized by spreading the re-inspected and qualified artificial marble waste in layers according to the principle of layered filling. Specifically, dump trucks were used to transport the inspected and qualified artificial marble waste to the filling area, and bulldozers or graders were used to spread and level it along the longitudinal direction of the roadbed to make the fill layer uniform in thickness and smooth in surface.

[0039] The above settings can create favorable conditions for subsequent watering and compaction operations, ensure the paving quality of each layer of fill material, and ensure that the thickness of each layer is consistent and the compaction effect is uniform.

[0040] The scheme was further optimized. The compaction coefficient λc is the ratio of the control dry density of the filler obtained by field testing to the maximum dry density obtained by indoor compaction test. The compaction standard is λc≥0.95.

[0041] The above settings allow for a scientific and accurate evaluation of the compaction quality of each foundation layer, ensuring that the density and bearing capacity of the foundation meet design requirements and effectively controlling the quality of foundation construction.

[0042] Further optimize the plan by testing the compaction degree after rolling. Specifically, use sand cone method testing equipment to test the compaction degree of each layer of compacted foundation. The sampling locations are evenly distributed within the subgrade area of ​​each layer, with at least 3 sampling points per 1000m².

[0043] The above settings can comprehensively and accurately reflect the compaction quality of each foundation layer, ensuring the representativeness and reliability of the test results, and promptly identifying and addressing areas with substandard compaction quality.

[0044] Further optimize the scheme and test the compaction degree after rolling. Specifically, use a light dynamic penetrometer for testing. The testing standard is that within a penetration depth of 30cm, the number of hammer blows in any three consecutive tests should not be less than 38.

[0045] The above settings provide a simple and quick alternative testing method when the sand cone method is not suitable for the site conditions. It can also effectively determine whether the compaction degree meets the design requirements, thus improving the flexibility and applicability of the testing method.

[0046] Further optimize the plan by locally compacting and reinforcing the edges and areas where compaction is insufficient. Specifically, this includes using small manual vibratory tampers to reinforce the foundation edges, corner areas that cannot be accessed by hydraulic vibratory plate compactors, and other unqualified local areas. The thickness of the reinforcing fill should not exceed 150mm, and the number of compaction passes should not be less than 4, until the compaction degree meets λc≥0.95.

[0047] The above settings ensure uniform compaction across the entire foundation cross-section, eliminating weak compaction zones or blind spots, thus guaranteeing the overall stability and bearing capacity of the foundation.

[0048] The hydraulic vibratory plate compaction construction method for using artificially manufactured marble waste as foundation replacement material, provided by this invention, is implemented as follows in actual construction: First, the original foundation soil to be replaced needs to be cleaned and the site leveled. Specifically, this involves excavating and clearing away the soft, weak original foundation soil, removing all debris within the site area, including tree roots, construction waste, and household garbage; draining any standing water and surface water to keep the site dry. After completing these steps, use a bulldozer or grader to roughly level the site, ensuring a smooth, even surface without significant undulations, providing a flat and solid working surface for subsequent filling operations.

[0049] Then, the artificial marble waste transported to the construction site undergoes an incoming inspection, primarily checking for moisture content and impurities. The incoming material inspection follows a batching rule: artificial marble waste from the same batch is grouped into batches not exceeding 100m³. 3 A batch, less than 100m 3 Each batch of filler material is considered a separate batch. Each batch must be sampled and tested to ensure that the content of impurities (such as plastic, wood chips, metal scraps, etc.) does not exceed design requirements and that moisture content fluctuations are within a controllable range. Only qualified artificial marble waste can be unloaded into the construction area for filling.

[0050] Subsequently, the inspected and qualified man-made marble waste was transported to the filling area by dump trucks and spread according to the principle of layered filling and compaction. The thickness of each layer of waste was controlled between 200mm and 300mm. After the waste was unloaded into the designated area, bulldozers or graders were used to initially spread and level it along the longitudinal direction of the roadbed, so that the waste layer was of uniform thickness and the surface was roughly flat.

[0051] After each layer of waste material is laid and leveled, a water truck is used to evenly spray water on the waste material layer. Simultaneously, a rapid moisture content meter is used to monitor the moisture content of the filler material in real time, gradually bringing it closer to the optimum moisture content range. In this method, the optimum moisture content (wg) of the artificial marble waste material is pre-determined to be approximately 18% through indoor standard compaction tests. During construction, watering or sun-drying should be used to ensure that the moisture content of the filler material is always controlled within the optimum moisture content (wg) ± 2% (i.e., between 16% and 20%). When the moisture content falls below this range, watering continues to increase humidification; if the moisture content is too high due to rainfall or other reasons, sun-drying or replacement should be carried out until the moisture content meets the requirements.

[0052] After the moisture content of the fill material reaches the standard, vibratory compaction is immediately initiated. This method uses a 15-ton excavator paired with a VC10D model plate compactor as the main compaction machinery, with a vibration force of 100KN during compaction. The hydraulic vibratory plate compactor is driven by high-pressure oil output from the excavator, which drives the hydraulic motor to rotate. The hydraulic motor drives the internal eccentric shaft to rotate synchronously. When the eccentric shaft rotates at high speed, it continuously generates alternating centrifugal force, forming high-frequency vibration with a vibration frequency of 40Hz to 45Hz. During compaction, adjacent compaction plates overlap by one-third to one-half of the plate width to ensure that there are no blind spots in the compaction. The hydraulic vibratory plate compactor is used to vibrate and compact the laid artificial marble waste layer, performing 2 to 4 passes of vibration compaction. Throughout the vibratory compaction process, a water truck works in conjunction, replenishing water as needed based on changes in the surface moisture of the waste material, strictly ensuring that the moisture content of the waste material is always maintained within the optimal moisture content range of wg ± 2% during compaction.

[0053] After each layer of waste material is compacted, the compaction quality is immediately tested. This method prioritizes using sand cone compaction testing equipment to test the compaction degree of the foundation. The compaction standard is that the compaction coefficient λc should be greater than or equal to 0.95. The compaction coefficient λc is the ratio of the control dry density of the fill material obtained from field testing to the maximum dry density obtained from indoor compaction tests. Sampling locations should be evenly distributed within each layer of the subgrade, every 1000m... 2 At least three locations must be tested. Only when the test results meet λc≥0.95 can the next process proceed. As an alternative testing method, when site conditions are not suitable for the sand cone method, a lightweight dynamic cone penetrometer can be used to test the compaction effect of the foundation. The testing standard is that within a penetration depth of 30cm, the number of hammer blows in any three consecutive tests must not be less than 38. For foundation edges, corner areas that cannot be accessed by the hydraulic vibratory plate compactor, and other local areas found to be insufficiently compacted, a small manual vibratory tamping plate should be used for reinforcement. The thickness of the reinforcement filler should not exceed 150mm, and the number of tamping passes should not be less than 4, until the compaction degree of the area meets the requirement of λc≥0.95.

[0054] Before each layer of new waste material is filled, technicians inspect the already compacted foundation surface of the next layer to confirm that there are no defects such as looseness, peeling, springiness, or water accumulation. Only after confirming that all test indicators are qualified can the spreading and compaction of the next layer of waste material be carried out.

[0055] Repeat the above steps, filling, compacting, and testing layer by layer until the roadbed reaches the design elevation. The thickness of each layer should be controlled between 200mm and 300mm. Strict procedures for moisture content control, vibratory compaction, and compaction degree testing should be followed for each layer to ensure that the compaction quality of each roadbed layer meets the design requirements. During construction, temporary drainage ditches should be excavated around the filling area to ensure that water does not accumulate on the foundation surface. Replacement work should be avoided on rainy days as much as possible. If rainfall occurs, work should be stopped immediately, and the spread or compacted waste material layers should be covered with tarpaulins.

[0056] This invention provides a hydraulic vibratory plate compaction method for foundation replacement using manufactured marble waste. By precisely controlling the moisture content of the manufactured marble waste during the compaction process and maintaining it within the optimal moisture content range of wg ± 2%, it effectively solves the technical problem of poor compaction performance caused by the resin content and fine powder particles of manufactured marble waste, which are sensitive to moisture content. When the moisture content is too low, the frictional resistance between waste particles is large, making compaction difficult; when the moisture content is too high, a thick bound water film forms on the surface of the waste particles, making it difficult for external compaction loads to be transmitted through direct contact and friction between particles. A large amount of compaction energy is consumed in overcoming the lubrication and flow of water, resulting in a "playdough" effect. This invention controls the moisture content near the optimal range, utilizing the lubricating effect of water to reduce the internal friction between particles, enabling the waste to achieve the most economical compaction effect and the maximum density during vibratory compaction.

[0057] A 15-ton excavator paired with a VC10D model plate compactor was used as the main compaction machinery. During compaction, a 100KN excitation force was applied. Through the combined effect of high-frequency vibration and static pressure, the internal friction and interlocking forces between waste particles were effectively reduced, allowing the particles to rearrange and interlock. Small particles fully filled the gaps between larger particles while expelling air from between them. The low-amplitude, high-frequency vibration generated by the vibratory plate compactor kept the material in a continuous "activated state," producing a dynamic kneading and squeezing effect of "impact-release-re-impact," effectively eliminating shear stress and internal voids between particles, resulting in better compaction than simple static compaction. When the compaction degree reached 95%, the characteristic value of the foundation bearing capacity could reach 300KPa, meeting the bearing capacity requirements of ordinary low-rise residential foundations.

[0058] The compaction degree of each compacted subgrade layer was tested using the sand cone method or light dynamic penetration test, with a compaction standard of λc ≥ 0.95, ensuring that the compaction quality and bearing capacity of each subgrade layer met the design requirements. For areas with insufficient compaction, small manual vibratory tampers were used for reinforcement to ensure uniform compaction of the entire foundation replacement soil, without weak or blind spots. This quality control system of layered compaction, layer-by-layer testing, and local reinforcement effectively improved the overall density and bearing capacity of the artificial marble waste foundation, and significantly reduced post-construction settlement.

[0059] The construction method of this invention is simple to operate, fast to construct, and highly efficient. Two to four passes of hydraulic vibratory plate compaction are sufficient to meet the requirements, resulting in low costs per square meter. Furthermore, this method enables the resource utilization of waste materials from artificial marble manufacturing, solving the environmental problems caused by the indiscriminate dumping of such waste, such as land occupation and water pollution, and demonstrating significant economic and social benefits.

[0060] This invention investigates the variation of the maximum dry density of artificial marble manufacturing waste with moisture content using a compaction test system. Standard compaction tests conducted using an electric numerically controlled compactor show that the maximum compacted dry density initially increases and then decreases with increasing moisture content, reaching a peak of 1.62 g / cm³ at a moisture content of 18%. 3 This provided experimental basis for accurately locating the optimal moisture content range and ensured the reliability of construction parameters.

[0061] In one specific embodiment, the artificial marble waste mentioned in this embodiment is the powdery solid waste generated during the production of artificial marble. The artificial marble uses unsaturated polyester resin as an adhesive and carbonate fragments and powders as the main raw materials.

[0062] In a specific experiment, to determine the optimal moisture content range for artificial marble manufacturing waste, a standard compaction test was conducted using a JDS-1 electric CNC compactor. The compaction hammer of this electric CNC compactor weighed 4.5 kg, had a drop height of 45 cm, a sample height of 12 cm, and a sample volume of 2177 cm³. 3 During the experiment, waste from artificially manufactured marble was collected, mixed with a certain amount of water, and dried and treated with moisture content control according to geotechnical testing procedures. The mixture was then compacted in three layers, with each layer compacted 98 times. This electric numerically controlled compactor is suitable for highway fill engineering and can determine the maximum dry density and corresponding optimum moisture content of the soil using standard compaction methods and under fixed compaction energy. The experiment tested the maximum compacted dry density according to the "Standard for Geotechnical Testing Methods" (GB / T50123-1999) to study its trend with moisture content.

[0063] Test results show that the maximum compacted dry density of artificial marble waste at low moisture content is 1.54 g / cm³. 3 As the moisture content increases, the maximum compacted dry density first increases and then decreases, reaching its maximum value of 1.62 g / cm³ at a moisture content of 18%. 3 It also achieves a relatively high dry density of 1.61 g / cm³ at moisture contents of 16% and 20%. 3 This test result verifies that controlling the moisture content within the range of optimum moisture content wg ± 2% can meet the vibration compaction requirements of artificial marble manufacturing waste.

[0064] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction method for using artificially manufactured marble waste as foundation replacement material with a hydraulic vibratory plate compactor, characterized in that, Includes the following steps: The original soil at the foundation site to be filled shall be cleaned and leveled. The incoming inspection of artificial marble waste is carried out to control the impurity content in the artificial marble waste. The re-inspected and qualified artificial marble waste is spread out according to the principle of layered filling, with each layer being 200mm-300mm thick; Control the moisture content of the packing material within the preset moisture content wg ± 2%; Multiple vibration compaction cycles are performed, and water is sprayed during the compaction process to maintain the moisture content of the filler within the preset moisture content wg±2% range; After compaction is completed, the compaction degree is tested, and the edges and areas that are not compacted are locally reinforced until the compaction coefficient λc ≥ 0.

95. After verifying that the compacted foundation surface meets the preset construction requirements, the next layer of filling will be carried out. Repeatedly fill, compact, and test in layers until the design elevation is reached.

2. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, The multiple vibration compaction is carried out using a hydraulic vibratory plate compactor. The hydraulic vibratory plate compactor is driven by high-pressure oil output from the excavator, which drives the hydraulic motor to rotate. The hydraulic motor drives the internal eccentric shaft to rotate synchronously. When the eccentric shaft rotates at high speed, it continuously generates alternating centrifugal force, forming high-frequency vibration. Under the dual action of vibration and the equipment's own weight, the fill material is compacted.

3. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 2, characterized in that, When the hydraulic vibratory plate compactor is used for compaction, it is vibrated with an excitation force of 100KN, the vibration frequency is 40Hz to 45Hz, and the number of vibration compaction passes is 2 to 4.

4. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, When multiple vibration compaction passes are performed, adjacent compaction plates overlap by one-third to one-half of the plate width.

5. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, The control of the moisture content of the filler within the preset moisture content wg±2% range specifically includes: using a water truck to uniformly spray water on the paved filler layer, and using a rapid moisture content detector to monitor the moisture content of the filler in real time. When the moisture content is lower than the preset range, water spraying continues to increase humidity, and when the moisture content is higher than the preset range, the filler is turned over or replaced. The preset moisture content wg is predetermined to be 20% through an indoor standard compaction test.

6. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, The re-inspected and qualified artificial marble waste is spread according to the principle of layered filling. Specifically, it includes: using dump trucks to transport the inspected and qualified artificial marble waste to the filling area, and using bulldozers or graders to carry out preliminary spreading and leveling along the longitudinal direction of the roadbed to make the fill layer uniform in thickness and smooth in surface.

7. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, The compaction coefficient λc is the ratio of the controlled dry density of the filler obtained from on-site testing to the maximum dry density obtained from indoor compaction tests, and the compaction standard is λc ≥ 0.

95.

8. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, The compaction degree test after rolling is completed includes: using sand cone method testing equipment to test the compaction degree of each layer of compacted foundation, with sampling locations evenly distributed within the subgrade area of ​​each layer, and at least 3 points tested per 1000m².

9. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, The compaction degree is tested after the rolling is completed. Specifically, the compaction degree is tested using a light dynamic penetrometer. The test standard is that within a penetration depth of 30cm, the number of hammer blows in any three consecutive tests is not less than 38.

10. The construction method for using artificially manufactured marble waste as foundation replacement with hydraulic vibratory plate compactor according to claim 1, characterized in that, Local compaction and reinforcement should be carried out on the edges and areas that are not properly compacted. Specifically, small manual vibratory tampers should be used to reinforce the foundation edges, corner areas that cannot be entered by hydraulic vibratory plate compactors, and other local areas that fail the test. The thickness of the reinforcing fill should not exceed 150mm, and the number of compaction passes should not be less than 4, until the compaction degree meets λc≥0.95.

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