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CN-121428972-B - Method and system for moisture and freeze thawing resistant soil site layered tamping

CN121428972BCN 121428972 BCN121428972 BCN 121428972BCN-121428972-B

Abstract

The invention relates to the technical field of ramming and repairing of earthen sites, in particular to a method and a system for ramming and repairing the earthen sites in layers, which are used for resisting moisture and freezing and thawing, and comprise the following steps: building an earthen site digital model, obtaining a ramming material set according to homologous earth materials and a preset moisture-resistant and freeze-thawing material set, preparing an optimal fusion earth material based on material proportion constraint conditions, identifying a region set to be rammed in the earthen site to be rammed based on the earthen site digital model, performing chemical curing on the region set to be rammed by using a chemical reinforcing solution to obtain a target rammed region set, and performing multilayer ramming on the target rammed region set by using the optimal fusion earth material, a dynamic deformation modulus tester and a rammer to obtain a rammed region set. The invention can improve the durability of the tamper and the compatibility of original sites, and reduce the repeated repair risk caused by material degradation or interface failure.

Inventors

  • LI SIJIA
  • SUN QINGHAO

Assignees

  • 北京化物天工科技有限责任公司

Dates

Publication Date
20260508
Application Date
20251103

Claims (8)

  1. 1. A method for hierarchical ramming of earthen sites resistant to moisture and freeze thawing, the method comprising: Confirming an earthen site to be tamped, and carrying out three-dimensional measurement on the earthen site to be tamped to obtain an earthen site digital model, wherein the three-dimensional measurement comprises three-dimensional laser scanning and geological radar detection; Collecting homologous soil materials based on a soil site to be rammed and supplementing the soil site, and obtaining a ramming and supplementing material group according to the homologous soil materials and a preset moisture-resistant and freeze-thawing resistant material group, wherein the ramming and supplementing material group comprises homologous soil materials, hydraulic lime, sintered ginger powder, polypropylene fibers and an organosilicon water repellent; Setting material proportion constraint conditions according to the ramming material group, and preparing an optimal fused soil material based on the material proportion constraint conditions; identifying a region group to be tamped in the earthen site to be tamped based on the earthen site digital model; Carrying out chemical curing on the region group to be tamped by utilizing the pre-obtained chemical reinforcing solution to obtain a target tamping region group, wherein the chemical reinforcing solution is calcium hydroxide solution; Performing multilayer tamping on the target tamping region group by utilizing an optimal fused soil material, a pre-built dynamic deformation modulus tester and a pre-built rammer to obtain a tamped region group, and completing the soil site layered tamping based on the tamped region group; the method for compacting the target rammed region group by utilizing the optimal fused soil material, the pre-built dynamic deformation modulus tester and the pre-built rammer comprises the following steps: sequentially extracting target tamping regions from the target tamping region group, and executing the following operations on the extracted target tamping regions: acquiring a standard tamping depth of the target tamping region based on the earthen site digital model; filling the target tamping region by utilizing the optimal fusion soil material to obtain a region to be tamped; Performing single-layer compaction on the area to be compacted by using a dynamic deformation modulus tester and a rammer to obtain a single-layer compacted area; Shaving the single-layer rammed area by utilizing a pre-constructed electric shaving machine to obtain a rough surface area, and detecting the rammed depth of the rough surface area; If the tamping depth does not reach the standard tamping depth, taking the rough surface area as a target tamping area, and returning to the step of filling the target tamping area by utilizing the optimal fusion soil material until the tamping depth reaches the standard tamping depth; If the tamping depth reaches the standard tamping depth, marking the single-layer tamping region as a tamped region; And summarizing the tamped areas to obtain a tamped area group.
  2. 2. The method for site layering tamper-addition with moisture and freeze thawing resistance of claim 1, wherein the preparing of the optimal fused soil based on material proportioning constraints comprises: Generating a plurality of test material proportioning groups based on material proportioning constraint conditions, wherein the test material proportioning groups comprise a plurality of test material proportioning; Sequentially extracting test material proportioning groups from a plurality of test material proportioning groups; preparing a test rammed earth material based on a test material proportioning group, and performing performance detection on the test rammed earth material to obtain a moisture-resistant freeze-thawing value and an earth property deviation value vector; respectively summarizing the moisture-resistant freeze-thawing value and the soil property deviation value vector to obtain a plurality of moisture-resistant freeze-thawing values and a plurality of soil property deviation value vectors; Calculating an optimal material proportioning group based on a plurality of moisture-resistant freeze-thawing values and a plurality of soil property deviation value vectors; And preparing the optimal fusion soil material according to the optimal material proportion group.
  3. 3. The method for site layered ramming and supplementing of moisture and freeze thawing resistant according to claim 2, wherein the performance detection of the experimental ramming and supplementing soil material to obtain the moisture and freeze thawing resistant value and the soil property deviation value vector comprises the following steps: Acquiring a reference soil material based on a soil site to be rammed and supplementing, and detecting the property of the reference soil material to obtain a reference soil property group, wherein the reference soil property group comprises a reference elastic modulus, a reference shrinkage and a reference color value; carrying out a moisture resistance test and a freeze thawing test on the test rammed earth material to obtain a moisture resistance freeze thawing value; Performing property detection on the test rammed earth material to obtain an original soil property group, wherein the original soil property in the original soil property group corresponds to the reference soil property in the reference soil property group one by one; and calculating an earth property deviation value group according to the original earth property group and the reference earth property group, and acquiring an earth property deviation value vector based on the earth property deviation value group.
  4. 4. The method for site-specific ramming and supplementing with moisture and freeze thawing resistant according to claim 3, wherein the step of performing a moisture resistance test and a freeze thawing test on the test rammed earth material to obtain a moisture resistance and freeze thawing resistance value comprises: obtaining a water stability test sample and a to-be-frozen thawing test sample based on the test rammed earth material; respectively carrying out compression tests on the water stabilization test sample and the sample to be frozen and thawed to obtain a first maximum compression strength and a second maximum compression strength; carrying out water absorption saturation operation on the water stabilization test sample to obtain a saturation test sample, and carrying out freeze thawing cycle on the test sample to be freeze thawed to obtain a freeze thawing cycle sample; respectively carrying out compression test on the saturation test sample and the freeze thawing cycle sample to obtain saturated maximum compression strength and freeze thawing maximum compression strength; Calculating a moisture resistance value based on the first maximum compressive strength and the saturated maximum compressive strength, and calculating a freeze-thaw resistance value based on the second maximum compressive strength and the freeze-thaw maximum compressive strength; and carrying out weighted calculation according to the moisture resistance performance value and the freeze-thawing resistance performance value to obtain the moisture resistance and freeze-thawing resistance value.
  5. 5. The method for site-directed hierarchical tamper-filling with moisture and freeze thawing resistance according to claim 4, wherein calculating the optimal material proportioning set based on the plurality of moisture and freeze thawing resistance values and the plurality of soil property deviation value vectors comprises: Setting a soil property deviation weight and a moisture-resistant freeze-thawing weight; constructing a plurality of raw material proportioning vectors based on the plurality of test material proportioning sets; calculating an optimal material proportioning vector based on the soil property deviation weight, the moisture-resistant freeze-thawing weight, the plurality of original material proportioning vectors, the plurality of moisture-resistant freeze-thawing values and the plurality of soil property deviation value vectors, wherein the optimal material proportioning vector is expressed as: ; Wherein, the The optimal material proportioning vector is represented by the formula, Represents the number of raw material proportioning vectors in the plurality of raw material proportioning vectors, Represents the moisture-resistant freeze-thaw weight, Indicating the first of a plurality of freeze-thaw values resistant to moisture The moisture resistance and the freeze thawing value are respectively, Represents the maximum moisture resistance freeze-thaw value of the plurality of moisture resistance freeze-thaw values, Indicating the deviation weight of the soil property performance, Representing a preset weight vector of the deviation value, Representing the first of a plurality of vectors of earth property deviation values The individual soil property deviation value vectors, The sign of the inner product representing the vector, Representing the first of a plurality of raw material proportioning vectors Raw material proportioning vectors; and obtaining the optimal material proportioning group based on the optimal material proportioning vector.
  6. 6. The method for site-specific hierarchical tamper-proofing of moisture and freeze thawing according to claim 5, wherein said chemically curing the set of areas to be tamper-proofed with the pre-acquired chemical strengthening solution to obtain a set of targeted tamper-proofed areas, comprising: sequentially extracting the areas to be tamped in the area group to be tamped, and executing the following operations on the extracted areas to be tamped: Spraying chemical reinforcing solution to the region to be tamped by using pre-constructed high-pressure rotary spraying equipment to obtain a current reinforcing region; Performing compressive strength evaluation on the current reinforced area based on preset permeation duration to obtain current compressive strength; If the current compressive strength is not greater than the preset compressive strength threshold, taking the current reinforced area as the area to be tamped and returning to the step of spraying the chemical reinforcing solution to the area to be tamped by utilizing the pre-built high-pressure rotary spraying equipment until the current compressive strength is greater than the compressive strength threshold; If the current compressive strength is greater than the compressive strength threshold, marking the area to be tamped as a target tamping area; and summarizing the target tamping region to obtain a target tamping region group.
  7. 7. The method for site layered tamping of moisture and freeze thawing resistant as recited in claim 6, wherein said using a dynamic deformation modulus tester and a ram to tamp the area to be tamped in a single layer results in a single layer tamped area comprising: the compaction region is impacted by using a rammer to obtain a compact compaction region; the compaction degree of the compact compaction region is detected by using a dynamic deformation modulus tester, so that the current compaction degree is obtained; if the current compaction degree is not greater than the preset compaction degree threshold value, marking the compacting area as an area to be compacted, and returning to the step of impacting the area to be compacted by using the rammer until the current compaction degree is greater than the compaction degree threshold value; If the current compaction is greater than the compaction threshold, the compaction region is noted as a single layer compaction region.
  8. 8. The method for site layered tamping of moisture and freeze thawing resistance of claim 7, wherein said using a dynamic deformation modulus tester to measure the compaction of the tightly tamped area to obtain the current compaction comprises: Carrying out dry density association on the site to be tamped and filled with soil by using a dynamic deformation modulus tester to obtain a dry density mapping curve, wherein the horizontal axis of the dry density mapping curve represents deformation modulus and the vertical axis represents dry density; Detecting the dynamic deformation modulus of the tight rammed area by using a dynamic deformation modulus tester, and inputting the dynamic deformation modulus into a dry density mapping curve to obtain updated dry density; Obtaining the maximum dry density of the site to be rammed; and calculating the current compaction degree according to the updated dry density and the maximum dry density, wherein the current compaction degree is the ratio of the updated dry density to the maximum dry density.

Description

Method and system for moisture and freeze thawing resistant soil site layered tamping Technical Field The invention relates to the technical field of earthen site tamping, in particular to an earthen site layered tamping method and system for resisting humidity and freeze thawing. Background The earthen site is used as an important material carrier for carrying historical information and civilized value, and the protection work is important for continuing the national cultural memory. However, long-term exposure to natural environment, especially to severe conditions such as humidity, freeze thawing cycle and the like, can cause serious diseases such as shortness, cavitation, cracking and the like of the earthen site body, and directly threatens the preservation of the structural safety and the historical primordia of the earthen site body. Therefore, the development of a scientific and effective tamping technology and the enhancement of the capability of the earthen site to resist the environmental erosion are urgent and important tasks in the field of cultural heritage protection. The traditional earth site tamping technology mainly relies on manual experience, adopts materials similar to original soil to conduct layered backfill tamping, and has obvious defects that the tamping materials lack of targeted modification, the moisture resistance and the freeze thawing resistance are insufficient, the tamping materials are easy to damage again, the repairing process lacks of digital guidance and quantitative control, the performance difference exists between a repairing body and an original site body, and the compatibility problems such as interface stripping and the like are easy to cause. Disclosure of Invention The invention provides a method and a system for the layered ramming and repairing of an earthen site, which are used for resisting moisture and freeze thawing, and mainly aim to improve the durability of ramming complement and the compatibility of original sites and reduce the repeated repairing risk caused by material degradation or interface failure. In order to achieve the above purpose, the invention provides a method for the layered ramming and repairing of an earthen site, which is resistant to moisture and freeze thawing, and comprises the following steps: Confirming an earthen site to be tamped, and carrying out three-dimensional measurement on the earthen site to be tamped to obtain an earthen site digital model, wherein the three-dimensional measurement comprises three-dimensional laser scanning and geological radar detection; Collecting homologous soil materials based on a soil site to be rammed and supplementing the soil site, and obtaining a ramming and supplementing material group according to the homologous soil materials and a preset moisture-resistant and freeze-thawing resistant material group, wherein the ramming and supplementing material group comprises homologous soil materials, hydraulic lime, sintered ginger powder, polypropylene fibers and an organosilicon water repellent; Setting material proportion constraint conditions according to the ramming material group, and preparing an optimal fused soil material based on the material proportion constraint conditions; identifying a region group to be tamped in the earthen site to be tamped based on the earthen site digital model; Carrying out chemical curing on the region group to be tamped by utilizing the pre-obtained chemical reinforcing solution to obtain a target tamping region group, wherein the chemical reinforcing solution is calcium hydroxide solution; And (3) carrying out multilayer tamping on the target tamping region group by utilizing the optimal fused soil material, the pre-built dynamic deformation modulus tester and the pre-built rammer to obtain a tamped region group, and completing the soil site layered tamping based on the tamped region group. Optionally, the preparing the optimal fused soil material based on the constraint condition of the material ratio comprises: Generating a plurality of test material proportioning groups based on material proportioning constraint conditions, wherein the test material proportioning groups comprise a plurality of test material proportioning; Sequentially extracting test material proportioning groups from a plurality of test material proportioning groups; preparing a test rammed earth material based on a test material proportioning group, and performing performance detection on the test rammed earth material to obtain a moisture-resistant freeze-thawing value and an earth property deviation value vector; respectively summarizing the moisture-resistant freeze-thawing value and the soil property deviation value vector to obtain a plurality of moisture-resistant freeze-thawing values and a plurality of soil property deviation value vectors; Calculating an optimal material proportioning group based on a plurality of moisture-resistant freeze-thawing values and a plurality of soil