CN113537799A - Evaluation and selection method for different construction processes of impact plain high-plasticity flowing soft foundation treatment - Google Patents
Evaluation and selection method for different construction processes of impact plain high-plasticity flowing soft foundation treatment Download PDFInfo
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Abstract
The application relates to the technical field of soft foundation treatment, and particularly discloses a method for evaluating and selecting different construction processes for treating a high-plasticity flowing soft foundation in an impact plain, which comprises the following operation steps: surveying the soil property of the land and carrying out pre-screening; 2-10 construction schemes are pre-selected; evaluating the cost A and the construction period duration B, and simultaneously grading the construction effect C; evaluating the expense A, the construction period duration B and the construction effect C of the pre-selected scheme to be used as accounting elements, and judging the weight proportions of the expense A, the construction period duration B and the construction effect C to be r, s and t respectively according to the actual surrounding environment and the construction period requirement of the project; establishing a measuring and calculating formula,
Description
Technical Field
The invention relates to the technical field of soft foundation treatment, in particular to a selecting method for different construction processes of impact plain high-plasticity flowing soft foundation treatment.
Background
With the rapid development of the infrastructure construction of China, in order to deepen the cooperation of Guangdong, hong Kong and Macao, the common home garden of Chinese nationality is constructed, and Guangzhou Zhujiang Delta of China is used as an important carrier of the cooperation of Guangdong, hong Kong and Macao to support the needs of economic development and modernized construction. The land in the region mainly takes the high-plasticity flowing soft foundation (also called as the washed and accumulated super-thick silt layer) of the plain as a main part, and the stratum mainly comprises silt, mucky soil, silty clay and silty fine sand. The thickness of the sludge layer of the sludge is large, generally 30-50m, the water content is large, and the engineering mechanical property is poor. A large number of buildings are built on a poor soft foundation, and the problems of uneven pavement settlement, structural cracking and the like are easily caused.
Disclosure of Invention
In order to quickly analyze and obtain the most economical and applicable treatment mode for alluvial plain high-plastic flowing soft foundation before construction, the application provides an evaluation method for treating different construction processes for the impacted plain high-plastic flowing soft foundation.
The application provides a selection method for treating different construction processes by using a high-plasticity flowing soft foundation in an impact plain, which adopts the following technical scheme:
a method for evaluating and selecting different construction processes for treating a high-plasticity flowing soft foundation on an impact plain comprises the following operation steps:
1) the method comprises the following steps of (1) surveying the soil texture condition of the land, combining the actual situation of the project according to the geological characteristics, and pre-screening soft foundation treatment by adopting different treatment modes according to different use requirements and different areas;
2) 2-10 construction schemes are pre-selected;
3) evaluating the cost A and the construction period duration B, and simultaneously grading the construction effect C;
4) evaluating the expense A, the construction period duration B and the construction effect C of the pre-selected scheme to be used as accounting elements, and judging the weight proportions of the expense A, the construction period duration B and the construction effect C to be r, s and t respectively according to the actual surrounding environment and the construction period requirement of the project;
5) establishing a measuring and calculating formula and selecting numerical values
6) And quickly evaluating the most suitable construction scheme selection sequence and the most suitable selection scheme through the measurement and calculation data.
Preferably, 4 to 6 construction schemes are optimally preselected in 2).
By adopting the technical scheme, the most economic and applicable processing mode for the alluvial plain high-plastic flowing soft foundation is obtained by rapid analysis and calculation before construction, so that the applicability, the economical efficiency and the reliability of the alluvial plain high-plastic flowing soft foundation construction method can be greatly improved. In addition, the selection method is verified through a specific Guangzhou south-sand new area project, an optimal soft soil treatment process under different geological conditions is summarized, guidance and suggestions are provided for a future soft foundation treatment scheme, and reasonable parameter guidance is provided for field construction.
Preferably, at least two construction schemes are preselected, and the specific pretreatment construction scheme is as follows:
(1) plastic drainage plates and overload prepressing construction schemes;
(2) plastic drainage plates and equal-load prepressing construction schemes;
(3) a cement mixing pile and equal-load prepressing construction scheme;
(4) a cement mixing pile composite foundation construction scheme;
(5) a plastic drainage plate, an overload prepressing and cement mixing pile construction scheme;
(6) the plastic drainage plate and vacuum preloading joint pre-compaction foundation treatment construction scheme.
Preferably, at least two construction schemes are preselected, and the specific pretreatment construction scheme is as follows:
(1) plastic drainage plates and overload prepressing construction schemes;
(3) a cement mixing pile and equal-load prepressing construction scheme;
(5) a plastic drainage plate, an overload prepressing and cement mixing pile construction scheme;
(6) the plastic drainage plate and vacuum preloading joint pre-compaction foundation treatment construction scheme.
By adopting the technical scheme, the accuracy of the scheme in the later stage evaluation can be improved through the scheme preselection process design, a large amount of evaluation work is simplified, and the work efficiency is greatly improved.
Preferably, the evaluation effect of the construction effect C is mainly based on at least three data of sedimentation amount in the construction period, sedimentation after construction, undisturbed soil shear strength, remolded soil shear strength, foundation bearing capacity, single cement mixing pile bearing capacity and cement mixing pile composite foundation bearing capacity.
Preferably, the construction effect C is required to be acceptable when the score is 26 or more.
By adopting the technical scheme, the process of evaluating the construction effect C is summarized and analyzed by combining with survey implementation data, and the grade of the survey implementation data is evaluated, so that an operator can conveniently perform comprehensive judgment on the selection of the later-stage optimized construction process.
Preferably, the weight of the cost a is r, the weight of the duration B is s, and the weight ratio of the construction effect C is t, where r + s + t is 1.
Preferably, r ≧ t, s ≧ t.
By adopting the technical scheme, the weight ratio of the cost A, the construction period duration B and the construction effect C is increased, and the accuracy of the final selected numerical value is improved by limiting the corresponding relation of different weights.
Preferably, the selection criterion of the construction scheme is that the higher the total score of the evaluation values is, the earlier the selection sequence is.
By adopting the technical scheme, when the evaluation value obtained by measurement and calculation is actually selected, the most suitable scheme selection sequence and the most suitable scheme can be directly judged through the specific evaluation value, so that the method is very convenient and fast, and the efficiency is greatly improved.
In summary, the present application has the following beneficial effects:
1. the application analyzes and obtains the most economical and applicable treatment mode for alluvial plain high-plastic flowing soft foundation quickly before construction.
2. During construction, the applicant analyzes experimental data by combining the foundation treatment mode of the project and analyzing the experimental data to observe the final settlement and compare the soft foundation treatment effect on the characteristics of high-plasticity soft foundation soft plastic state of the flush plain and the flow plastic soft soil layer in the south sand area, such as large fluidity, large settlement and the like. The optimal soft soil treatment process under different geological conditions is summarized, guidance and suggestion are provided for a future soft foundation treatment scheme, and reasonable parameters are provided for field construction.
Detailed Description
The present application will be described in further detail with reference to examples.
Example 1: a method for evaluating and selecting different construction processes for treating a high-plasticity flowing soft foundation on an impact plain comprises the following steps:
1) and (3) surveying the soil texture condition of the land, combining the actual condition of the project according to the geological characteristics, and pre-screening the soft foundation by adopting different treatment modes according to different use requirements and different areas.
2) 2-10 processable construction schemes are preselected.
3) The evaluation standard of the construction effect is calculated according to the total score of 100, and the specific evaluation standard is shown in the following table 1.
TABLE 1 evaluation criteria for construction effects
4) And evaluating the expense A, the construction period duration B and the construction effect C of the pre-selected scheme as accounting factors, judging that the weight proportions of the expense A, the construction period duration B and the construction effect C are r, s and t respectively according to the actual surrounding environment and the construction period requirement of the project, and setting r + s + t as 1.
5) The establishment of the measurement formula is as follows: value of evaluation
The higher the total score of the rating values, the more advanced the selection order.
6) And quickly evaluating the most suitable construction scheme selection sequence and the most suitable selection scheme through the measurement and calculation data.
Project application example 1: a method for evaluating and selecting different construction processes for treating a high-plasticity flowing soft foundation in an impact plain comprises the steps of taking a block comprehensive development project of a big-post advanced manufacturing base in the New Guangzhou southern Sha region as a block comprehensive development project, wherein the total occupied area of the project is 820 ten thousand square meters, and the project content comprises matched roads, public facilities and the like. The site is located in the Yangtze delta alluvial plain, belongs to the river mouth and is reflected according to geological exploration data. The stratum soil is composed of miscellaneous fill, silt, mucky soil, silty clay, a sand layer and bedrock from top to bottom in sequence. Wherein the silt and the mucky soil have the average thickness of 25m, are gray, gray black, saturated, soft and partially plastic, contain a small amount of fine silt and organic matters, and have fishy smell; the powdery clay and clay have the average thickness of 7m, are gray, gray yellow and grey white, are soft and plastic, contain a small amount of fine silt, are uniform in soil and have general viscosity; the sand layer is fine sand, medium coarse sand, sand gravel and the like; the bedrock is mainly granite.
Aiming at the geological characteristics, the soft foundation treatment is carried out by adopting different treatment modes with different use requirements and different areas according to the actual conditions of engineering. Six kinds of construction schemes that can handle are preselected in this application, and specific treatment scheme is:
(1) the plastic drainage plate and overload prepressing construction scheme is called as plastic drainage plate and overload prepressing for short;
(2) the plastic drainage plate and the equal-load prepressing construction scheme are called as the plastic drainage plate and the equal-load prepressing for short;
(3) the construction scheme of the cement mixing pile and the equal-load prepressing is called cement mixing pile and equal-load prepressing for short;
(4) the cement mixing pile composite foundation construction scheme is called cement mixing pile composite foundation for short;
(5) the construction scheme of the plastic drainage plate, the overload prepressing and the cement mixing pile is called as the plastic drainage plate, the overload prepressing and the cement mixing pile for short;
(6) the plastic drainage plate and vacuum preloading combined foundation treatment construction scheme is called as material drainage plate and vacuum preloading combined foundation for short.
Index analysis of each construction scheme is as follows:
test one: evaluation of working Effect C
The method mainly aims at analyzing the treatment effect of the impact plain ultra-thick sludge layer in different soft foundation treatment modes, and combines the construction effect evaluation standards in the table 1, 6 middle-level construction engineers are randomly selected to uniformly score six different construction schemes, and the average value of the scoring data is rounded and recorded in the table 3.
(1) Plastic drain board + overload prepressing: the construction method comprises the steps of adopting plastic drainage plates and an overload prepressing construction method in the strip road engineering, leveling a field during construction, laying a coarse sand cushion layer of 30cm, then driving the plastic drainage plates with the depth of 25m according to the interval of 1.2m, then laying the coarse sand cushion layer of 20cm, additionally laying 2 layers of unidirectional geogrids, then filling each layer with the thickness of about 25cm, observing once every filled layer, wherein the thickness of the one layer is not more than 10-15 mm every day and the displacement of a side pile is not more than 5mm every day and night. And after roadbed filling is finished, observing every 3d every first month, observing every 7d every second and third months, observing every 15d every fourth month till the pre-pressing period is finished, and determining that the settlement amount observed in 2 months is not more than 5mm every month as stable. The total filling height is the conversion value of permanent load and dynamic load, namely overload prepressing. The overload value of the project is 20 KN/square meter, and the actual construction is controlled according to the roadbed superfilling of 1 m.
The method is suitable for a soft foundation treatment mode with large filling height, the sedimentation amount is large in the construction period, the sedimentation amount is generally 1-2m and is changed according to the change of the stratum and the filling height, and the sedimentation after construction is relatively small and is generally not more than 10 cm.
Through settlement observation, monitoring points are arranged after the site is leveled in the construction process of the engineering, observation is carried out once every filling layer, the settlement is about 12.5mm every day in the filling period, and the settlement of the center of the embankment is not more than 15mm every day and night. After the roadbed is filled, the settlement is gradually decreased until the settlement in the next 2 months is 1mm, 0.5mm and is stable when the settlement is not more than 5mm, and the prepressing period is 6 months in total. The accumulated settling volume in the construction period is about 1.6m, and the consolidation degree is 91.85%. The post-construction settlement after completion was about 13.6 cm.
Through detection and analysis, the shear strength of the undisturbed soil is improved to 44.54Kpa from the original 10.3Kpa, the shear strength of the remolded soil is improved to 12.75Kpa from the original 11.2Kpa, and the sensitivity is 3.6. The bearing capacity of the foundation reaches 160kPa, and all indexes meet the design requirements.
(2) Plastic drain board + equal-load prepressing: the construction process is equivalent to overload preloading, but the stacking height is a permanent load conversion value, and a later dynamic load conversion value is not added. Compared with overload preloading, the equal-load preloading reduces the filling height, reduces the settlement in the construction period and increases the settlement after construction, and can be used for treating the foundation of roads and fields with low grade, and the settlement after construction is generally 20-30 cm.
(3) Cement mixing pile + equal-load prepressing: in order to reduce the influence on the settlement of surrounding structures in the strip road engineering, cement mixing piles and an equal-load prepressing construction method are adopted, after a field is leveled, cement mixing piles are arranged according to the distance of 1.4m, the treatment depth is about 15m, then a 30cm thick gravel cushion layer is laid, 2 layers of bidirectional geogrids are additionally laid, and then the layered filling prepressing is carried out according to the equal-load prepressing. The total filling height is a permanent load, namely equal-load prepressing.
The method is suitable for areas with reduced settlement, the settlement is small in construction period, generally 10-30cm, and is changed according to the height change of the stratum and the filled soil, and the settlement after construction is relatively small and generally not more than 10 cm.
Through settlement observation, in the construction process of the engineering, monitoring points are arranged after the site is leveled, observation is carried out once every filling layer, the settlement of the filling period is about 1.6mm every day, after the roadbed is filled, the pre-pressing period is 3 months, the settlement of the next 2 months is 0.5 mm/month, and the settlement is stable when the settlement is not more than 5 mm. The accumulated settling volume in the construction period is about 0.15m, and the consolidation degree is 92.8 percent. The post-construction settlement after completion was about 1.08 cm.
Through detection and analysis, the bearing capacity of a single cement mixing pile reaches 77KN, the bearing capacity of a composite foundation of the cement mixing pile reaches 100KN, and all indexes meet the design requirements.
(4) Cement mixing pile composite foundation: after the method is used, the foundation is directly constructed with the structures, but after the method is used in the area, the phenomenon that the structures crack due to the sinking of the foundation is found.
(5) Plastic drainage plate + overload prepressing + cement mixing pile: in order to reduce the influence on the settlement of surrounding structures in the strip road engineering or as a transition section of a road and a structure, a cement mixing pile, a plastic drainage plate and an overload prepressing (long plate short pile) processing method is adopted, cement mixing piles are arranged at a distance of 1.6m after a field is leveled, the processing depth is about 10m, a coarse sand cushion layer in 30cm is laid after the field is leveled during construction, then plastic drainage plates with the depth of 25m are arranged at a gap of the cement mixing piles according to the distance of 1.6m, then the coarse sand cushion layer in 20cm is laid, 2 layers of unidirectional geogrids are additionally laid, then filling is carried out in layers, and the total filling height is a permanent load and dynamic load conversion value, namely the overload prepressing. The overload value of the project is 20 KN/square meter, and the actual construction is controlled according to the roadbed superfilling of 1 m.
The construction method is suitable for secondary treatment after foundation treatment of a structure foundation in a road or field range, eliminates post-construction settlement after the secondary treatment, greatly improves the bearing capacity of the foundation, and uses foundation treatment modes such as rain and sewage pipelines, culverts and the like in the road range.
Through settlement observation, monitoring points are arranged after the site is leveled in the construction process of the engineering, observation is carried out once every filling layer, the settlement of the filling layer is about 14.2mm every day, and the settlement of the center of the embankment is not more than 15mm every day and night. After the roadbed is filled, the settlement is gradually decreased until the settlement in the next 2 months is 1.02 mm/month, the settlement is stable when the settlement is not more than 5mm, and the pre-pressing period is 6 months in total. The accumulated settling volume in the construction period is about 0.95m, and the consolidation degree is 97.88%. The post-construction settlement after completion was about 2 cm.
Through detection and analysis, the shear strength of the undisturbed soil is improved to 58.4Kpa from the original 10.3Kpa, the shear strength of the remolded soil is improved to 14.75Kpa from the original 11.2Kpa, and the sensitivity is 4.2. The bearing capacity of the single cement mixing pile reaches 77KN, the bearing capacity of the composite foundation of the cement mixing pile reaches 100KN, and all indexes meet the design requirements.
(6) Plastic drainage plate + vacuum preloading combined prepressing: in order to reduce the excavation, transportation and abandonment of a large amount of earth and stones in rectangular areas of plant construction and the like, a plastic drainage plate and vacuum preloading combined construction method is adopted, geogrids and coarse sand cushion layers in 30cm are laid after a field is leveled, then the plastic drainage plates are arranged according to the interval of 1.2m, the treatment depth of the plastic drainage plates is 25m, finally the coarse sand cushion layers in 20cm are laid, water filter pipes are buried according to requirements, then sealing films are laid, the periphery of the sealing films is sealed by adopting mud sealing walls, then a jet pump is installed on the water filter pipes, and vacuumizing is carried out. The vacuum pressure should not be less than 96 kPa. And after vacuumizing for 2 months, the surface of the vacuum film is piled with 1 m-thick backfill sand for loading compensation.
The method is suitable for large-area field leveling areas with shortage of earth volume resources, the sedimentation amount is large in the construction period, the sedimentation amount is generally 1.5-2.0m and is changed according to the change of the stratum and the height of filled soil, the post-construction sedimentation is relatively small and is generally not more than 10 cm.
Through settlement observation, monitoring points are arranged after the site is leveled in the construction process of the project, observation is carried out after vacuumizing, the pre-pressing period is not less than once per day, and the settlement amount in the pre-pressing period is about 25.2mm per day. And when the actually measured ground settlement rate is 5 d-10 d, the average settlement is less than 2mm/d, and the fully loaded prepressing time is not less than 90d, the ground settlement is regarded as stable. The accumulated settling volume in the construction period is about 1.7m, and the consolidation degree is 90.79%. The post-construction settlement after completion was about 15.6 cm.
Through detection and analysis, the shear strength of the undisturbed soil is improved to 34.28Kpa from the original 10.3Kpa, the shear strength of the remolded soil is improved to 12.35Kpa from the original 11.2Kpa, and the sensitivity is 2.8. The bearing capacity of the foundation reaches 160kPa, and all indexes meet the design requirements.
And (2) test II: evaluation of duration B of construction period
The method mainly aims at researching the construction period of the impact plain ultra-thick sludge layer by adopting different soft foundation treatment modes, and researches the construction periods of the following foundation treatments from the whole processes of construction preparation, construction process and construction ending by taking 5000 square meters as calculation units according to the following six treatment modes, so that a reasonable treatment scheme is selected, and the construction period duration of the six construction schemes is recorded in a table 3.
(1) Plastic drain board + overload prepressing: and constructing a medium and coarse sand lower cushion layer for 1 day, inserting and beating a plastic drainage plate for 1 day, constructing a medium and coarse sand upper cushion layer for 1 day, and calculating roadbed stacking according to the construction monitoring data, wherein the roadbed stacking is generally one layer in 3 days, the filling thickness of each layer is 25cm, the total filling height is 4m, the settlement is 1.8m, and the overload is 1 m. 28 layers are required to be filled totally, the filling period is 84 days, the loading waiting period is 180 days, the unloading is about 2 days, and the total construction period is 269 days.
(2) Plastic drain board + equal-load prepressing: and constructing a medium and coarse sand lower cushion layer for 1 day, inserting and beating a plastic drainage plate for 1 day, constructing a medium and coarse sand upper cushion layer for 1 day, and calculating the roadbed stacking load by using equal load according to the construction monitoring data, wherein the roadbed stacking load is generally one layer in 3 days, the filling thickness of each layer is 25cm, the total filling height is 4m, and the settlement is 1.5 m. 28 layers are required to be filled totally, the filling period is 66 days, the loading waiting period is 180 days, the unloading is about 2 days, and the total construction period is 251 days.
(3) Cement mixing pile + equal-load prepressing: the cement mixing pile construction is carried out for 10 days, the equal strength detection is carried out for 35 days, the broken stone cushion layer construction is carried out for 1 day, the roadbed stacking load is generally not influenced according to the construction monitoring data, the roadbed stacking load is calculated according to three layers every day, the filling thickness of each layer is 25cm, the total filling height is 4m, the settlement amount is 0.5m, and the equal load calculation is carried out. 18 layers are required to be filled, the filling period is 6 days, the loading waiting period is 90 days, the unloading period is about 2 days, and the total construction period is 144 days.
(4) Cement mixing pile composite foundation: and (3) constructing the cement mixing pile for 10 days, and detecting for 35 days with equal strength. The next process construction can be carried out after 45 days.
(5) Plastic drainage plate + overload prepressing + cement mixing pile: the treatment method is generally used for the secondary treatment of the structure, wherein the treatment period is plastic drainage plates, the overload prepressing period and the cement mixing pile composite foundation period, namely 314 days.
(6) Plastic drainage plate + vacuum preloading combined prepressing: the construction of the medium and coarse sand lower cushion layer is carried out for 1 day, the plastic drainage plate is inserted and punched for 1 day, the construction of the medium and coarse sand upper cushion layer is carried out for 1 day, the construction of the water filter pipe is carried out for 3 days, the sealing film is laid for 2 days, and the sealing ditch can be synchronously implemented without calculating the construction period. And (5) trying to pump for 5 days, formally vacuumizing for 90 days, and totally constructing for 103 days.
And (3) test III: evaluation of cost A
The method mainly aims at researching the economy of adopting different soft foundation treatment modes for impacting a plain super-thick sludge layer, and the economy comparison is carried out from a plurality of key links of people, machines and materials according to the following treatment modes by taking 5000 square meters as a calculation unit, so that the economy of the following foundation treatment is researched, and a reasonable treatment scheme is selected. See table 2 for a comparison of the treatment scheme costs.
TABLE 2
Taking the comprehensive development project of the Guangzhou south sand new district big post advanced manufacturing base block as an example: because the capital and construction period requirements of the project are relatively tight, in order to accelerate the construction period and reduce the filling and digging amount of earthwork, the weight of the cost A of the project is determined to be 40%, the weight of the duration B of the construction period is determined to be 40%, and the weight of the construction effect C is determined to be 20%. According to the formula
The results of the calculations are given in table 3.
TABLE 3
As can be seen from table 3, the selection order (expressed by the numbers) of the above six construction schemes in accordance with the suitability of the project is: 6 is more than 3 and more than 1 and more than 5 and more than 2 and more than 4. Namely, the construction method combining the plastic drainage plate (6) and the vacuum stacking is selected as the method for treating the high-plasticity flowing soft foundation on the impact plain, so that the method is more economical, applicable and reliable.
The specific embodiments are merely illustrative of the present application and are not restrictive of the present application, and those skilled in the art can make modifications of the embodiments as required without any inventive contribution thereto after reading the present specification, but only protected by the patent laws within the scope of the claims of the present application.
Claims (7)
1. The evaluation and selection method for treating different construction processes by using the impact plain high-plasticity flowing soft foundation is characterized by comprising the following operation steps of:
1) the method comprises the following steps of (1) surveying the soil texture condition of the land, combining the actual situation of the project according to the geological characteristics, and pre-screening soft foundation treatment by adopting different treatment modes according to different use requirements and different areas;
2) 2-10 construction schemes are pre-selected;
3) evaluating the cost A and the construction period duration B, and simultaneously grading the construction effect C;
4) evaluating the expense A, the construction period duration B and the construction effect C of the pre-selected scheme to be used as accounting elements, and judging the weight proportions of the expense A, the construction period duration B and the construction effect C to be r, s and t respectively according to the actual surrounding environment and the construction period requirement of the project;
5) establishing a measuring and calculating formula,
；
6) and quickly evaluating the most suitable construction scheme selection sequence and the most suitable selection scheme through the measurement and calculation data.
2. The method for selecting different construction processes for treating the impact plain high-plasticity flowing soft foundation according to claim 1, wherein at least two construction schemes are selected in advance, and the construction scheme of specific pretreatment is as follows:
(1) plastic drainage plates and overload prepressing construction schemes;
(2) plastic drainage plates and equal-load prepressing construction schemes;
(3) a cement mixing pile and equal-load prepressing construction scheme;
(4) a cement mixing pile composite foundation construction scheme;
(5) a plastic drainage plate, an overload prepressing and cement mixing pile construction scheme;
(6) the plastic drainage plate and vacuum preloading joint pre-compaction foundation treatment construction scheme.
3. The method for evaluating different construction technologies for treating the high-plasticity flowing soft foundation of the impact plain according to claim 1, wherein the evaluation effect of the construction effect C is mainly based on at least three data of sedimentation amount in a construction period, sedimentation after construction, undisturbed soil shear strength, remolded soil shear strength, foundation bearing capacity, cement mixing pile single pile bearing capacity and cement mixing pile composite foundation bearing capacity.
4. The method for selecting different construction processes for treating the impact plain high-plasticity flowing soft foundation according to claim 3, wherein the construction effect C is qualified when the score of the construction effect C is more than 26.
5. The method for selecting different construction processes for treating the impact plain high-plasticity flow soft foundation according to claim 4, wherein the weight of the cost A is r, the weight of the duration B in the construction period is s, and the weight ratio of the construction effect C is t, wherein r + s + t = 1.
6. The method for evaluating different construction processes for treating the impact plain high-plasticity flowing soft foundation according to claim 5, wherein r is more than or equal to t, and s is more than or equal to t.
7. The method for selecting different construction processes for treating the impact plain high-plasticity flowing soft foundation according to claim 6, wherein the selection criteria of the construction scheme is that the higher the total score of the selection values is, the earlier the selection sequence is.
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