CN-122018458-A - Soft soil foundation house construction engineering composite reinforcement construction technology

CN122018458ACN 122018458 ACN122018458 ACN 122018458ACN-122018458-A

Abstract

The application belongs to the technical field of civil engineering, and particularly relates to a composite reinforcement construction process for soft soil foundation building engineering. The application discloses a composite reinforcement construction process for soft soil foundation building engineering, which aims to solve the inherent conflict of rigid reinforcement and flexible consolidation means in the aspects of time sequence arrangement, function coordination and deformation coordination. The process comprises the steps of firstly carrying out vacuum preloading, drainage consolidation, synchronously carrying out deep mixing pile hole guiding, then carrying out grading stacking combined consolidation under the coverage of a sealing film, completing mixing pile forming in the middle stage, keeping the contact interface between the pile top and a sand cushion layer open after pile forming, continuing stacking until settlement is stable, and carrying out foundation construction after standing observation and micro grouting leveling. Through the nonlinear coupling time sequence and the multi-scale bearing mechanism, the unification of high construction efficiency, controllable deformation, resource saving and long-term durability is realized.

Inventors

LI WEITONG
LI LIHUI
WANG ZHAO
Lei Songyi
ZHANG TIAN
MEI HAN
YAO YAO
ZHANG LEI
DING KUN
ZUO ZHAO

Assignees

湖北华中科技工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260116

Claims (10)

1. The composite reinforcement construction process for the soft soil foundation building engineering is characterized by comprising the following steps of: Firstly, collecting geological information of a target soft soil foundation area, synchronously dividing a plurality of reinforcement units, and locking a composite reinforcement mode suitable for each reinforcement unit based on historical soil response data of each reinforcement unit and combining the current soil physical state; step two, based on the matched composite reinforcement mode, identifying an implementation window of the reinforcement unit corresponding to each foundation reinforcement mode in the history construction record, and locking a construction period to be selected, in which the reinforcement unit can execute composite reinforcement, by combining with the current construction environment conditions; step three, based on the determined construction period to be selected and the identified non-disturbance period, performing composite reinforcement operation on the reinforcement unit, wherein the specific period of construction is positioned in the construction period to be selected and the non-disturbance period; And step four, when composite reinforcement operation exists for a plurality of reinforcement units in the same construction period, evaluating whether the reinforcement units can complete all reinforcement steps within the determined total composite reinforcement duration based on soil response rates of the reinforcement units corresponding to the reinforcement units, if so, maintaining the original construction arrangement, and if not, dynamically allocating construction resources.
2. The soft soil foundation construction engineering composite reinforcement construction process according to claim 1, wherein the specific sub-steps of the first step are as follows: S11, based on the defined reinforcement unit, taking the current construction stage as a reference node, extracting a plurality of groups of soil intensity change curves generated in the past multi-round reinforcement treatment process from historical soil response data of the reinforcement unit, performing trend fitting on a plurality of groups of intensity change curves corresponding to single-round reinforcement treatment, determining strength increase characteristics corresponding to reinforcement treatment, determining a plurality of groups of strength increase characteristics based on multi-round reinforcement treatment, and determining a response capacity interval of the reinforcement unit according to initial response rates and stable platform period lengths of the plurality of groups of strength increase characteristics; S12, based on the water content, the void ratio and the compression modulus in the current soil physical state, and combining the determined response capacity interval, matching a composite reinforcement mode suitable for the reinforcement unit, wherein the composite reinforcement mode is formed by combining at least two foundation reinforcement modes according to a specific sequence.
3. The soft soil foundation construction engineering composite reinforcement construction process according to claim 1, wherein the specific mode of the step two is as follows: s21, defining a group of analysis periods, identifying implementation periods of each basic reinforcement mode of the reinforcement unit in the analysis period from a historical construction record, wherein the implementation periods are represented by a continuous time axis, extracting overlapping time periods from the identified groups of implementation periods, sorting the extracted groups of overlapping time periods according to the overlapping frequency corresponding to the overlapping time periods in a mode of the overlapping frequency from high to low to form an overlapping time period sequence, and arranging according to time sequence if overlapping time periods with the same overlapping frequency exist; S22, identifying the total coverage proportion of the implementation time period in a single day based on the implementation distribution of different foundation reinforcement modes in the day, carrying out statistical treatment on a plurality of groups of coverage proportions generated in the analysis period, determining a comprehensive coverage proportion value, and locking the length of a reference construction window based on the product of the comprehensive coverage proportion value and the time length of the whole day; s23, based on the length of the reference construction window, removing part of the overlapping time periods with the duration less than the threshold of the length of the reference construction window from the overlapping time period sequence, and calibrating the overlapping time period sequence after the removal processing as a construction sequence to be selected; S24, identifying non-disturbance time periods corresponding to the internal overlapping time periods from the construction sequence to be selected, calibrating the non-disturbance time periods with specific duration exceeding the total composite reinforcement time length required by the reinforcement unit as the construction time period to be selected based on specific duration of different non-disturbance time periods, and calibrating the non-disturbance time periods within the total composite reinforcement time length range as the construction time period to be selected if the non-disturbance time periods with specific duration exceeding the total composite reinforcement time length do not exist.
4. The composite reinforcement construction process for soft soil foundation construction engineering according to claim 1, wherein in the third step, the sub-steps associated with the specific selected logic of the specific period of time are as follows: Identifying whether the reinforcement unit has a construction period to be selected, if so, executing composite reinforcement operation on the reinforcement unit from the construction period to be selected nearest to the current construction period, if not, completing all reinforcement steps in the construction period to be selected, identifying whether the construction period to be selected exists subsequently, if so, continuing to execute the rest reinforcement steps, and if not, selecting the nearest non-disturbance period to execute the rest reinforcement steps until the composite reinforcement operation is completed completely; if the construction period to be selected does not exist, the composite reinforcement operation is executed on the reinforcement unit in the non-disturbance period closest to the current construction period, and if all reinforcement steps are not completed, the residual reinforcement steps are executed continuously by adopting the non-disturbance period confirmed in succession until the composite reinforcement operation is completed.
5. The composite reinforcement construction process for soft soil foundation construction engineering according to claim 1, wherein in the fourth step, the concrete way for evaluating whether the reinforcement unit can complete all reinforcement steps within the determined total composite reinforcement duration is as follows: S41, limiting a monitoring window based on a plurality of composite reinforcement operations existing in the same construction period, identifying the soil response rate generated by the corresponding reinforcement unit in the monitoring window, identifying the residual reinforcement step number of the corresponding reinforcement unit, marking the residual work load, determining the estimated time required by the reinforcement unit to complete the residual reinforcement step by combining the residual work load and the soil response rate, and judging whether the total construction time of the reinforcement unit exceeds the total composite reinforcement time adapted by the reinforcement unit based on the time spent by executing the reinforcement step: If the construction schedule is not exceeded, maintaining the original construction schedule; otherwise, step S42 is executed to dynamically allocate construction resources.
6. The composite reinforcement construction process for soft soil foundation construction engineering according to claim 5, wherein in the step S42, the reinforcement unit whose total construction time does not exceed the total composite reinforcement time length adapted thereto is marked as a priority support unit, the maximum allowable value of the priority support unit corresponding to the total composite reinforcement time length is determined, the minimum response rate required by the priority support unit is determined by combining the difference between the remaining workload and the maximum allowable value minus the elapsed time, the construction resource configuration of the priority support unit is adjusted to satisfy the minimum response rate requirement, and the released construction resource is redistributed to the reinforcement unit not marked as the priority support unit.
7. The composite reinforcement construction process for soft soil foundation building engineering according to claim 6, wherein the minimum response rate required by other reinforcement units which are not marked as priority guarantee units is determined by adopting the same processing mode, when the soil response rate presented by the reinforcement units after resource allocation is obtained meets the minimum response rate requirement, the resource allocation is stopped, and if the minimum response rate requirement cannot be met all the time, the construction resource allocation of the reinforcement units is regulated to a balanced load state, and then the allocation is stopped.
8. The soft soil foundation house construction engineering composite reinforcement construction process according to claim 2, wherein in the determination of the response capacity interval, an exponential growth model or an S-shaped Logistic model is adopted for trend fitting on each soil body strength change curve, the initial response rate and the stable platform period length are extracted, and the response capacity interval is constructed.
9. The composite reinforcement construction process for soft soil foundation construction engineering according to claim 1, wherein in the history implementation window recognition, the implementation time period of the foundation reinforcement mode is extended by ±1 day to form a buffer zone, and then intersection is calculated to determine an overlapping time period.
10. The composite reinforcement construction process of soft soil foundation building engineering according to claim 1, wherein in the soil response rate monitoring and resource dynamic allocation, the soil response rate is collected in real time through a buried micro penetrometer and a strain gauge, the residual workload is quantized into standard working hours, and the estimated completion time is calculated by combining the unit time output under the current resource allocation.

Description

Soft soil foundation house construction engineering composite reinforcement construction technology Technical Field The invention belongs to the technical field of foundation and foundation engineering, and particularly relates to a soft soil foundation house construction composite reinforcement construction process. Background When the house construction engineering is carried out on the soft soil foundation, the problems of foundation settlement, uneven deformation and the like are easily caused due to low soil strength, high compressibility and poor drainage performance, and the safety and the use function of the upper structure are affected. In order to improve the bearing capacity and stability of the foundation, various reinforcement means are often adopted in engineering, such as a replacement method, a prepressing method, pile foundation reinforcement, grouting reinforcement, reinforcement of geosynthetic materials, and the like. The part of construction process forms a composite treatment mode by combining different reinforcement methods so as to achieve synergistic effects in aspects of controlling sedimentation, improving bearing capacity, shortening construction period and the like. However, in the existing composite reinforcement construction process, the connection mode among the working procedures, the arrangement of the construction sequence and the control measures for foundation disturbance have significant influence on the final reinforcement effect. If the construction steps lack systematic coordination, uneven stress distribution in the reinforced area and excessive soil disturbance can be caused, or the reinforced material can not fully play a role, so that the improvement of the overall foundation performance is affected. Therefore, it is necessary to provide a composite reinforcement construction process with clear logic, reasonable steps and strong adaptability so as to optimize the soft soil foundation treatment effect and ensure the long-term stability and safety of the building engineering. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a soft soil foundation house construction project composite reinforcement construction process, which solves the problems of disordered procedure connection, insufficient disturbance control and ineffective excitation of reinforcement material synergism in the existing composite reinforcement construction process. The invention aims to realize the technical scheme that the composite reinforcement construction process for the soft soil foundation house construction engineering comprises the following steps: a soft soil foundation house construction engineering composite reinforcement construction process comprises the following steps: Firstly, collecting geological information of a target soft soil foundation area, synchronously dividing a plurality of reinforcement units, and locking a composite reinforcement mode suitable for each reinforcement unit based on historical soil response data of each reinforcement unit and combining the current soil physical state; step two, based on the matched composite reinforcement mode, identifying an implementation window of the reinforcement unit corresponding to each foundation reinforcement mode in the history construction record, and locking a construction period to be selected, in which the reinforcement unit can execute composite reinforcement, by combining with the current construction environment conditions; step three, based on the determined construction period to be selected and the identified non-disturbance period, performing composite reinforcement operation on the reinforcement unit, wherein the specific period of construction is positioned in the construction period to be selected and the non-disturbance period; And step four, when composite reinforcement operation exists for a plurality of reinforcement units in the same construction period, evaluating whether the reinforcement units can complete all reinforcement steps within the determined total composite reinforcement duration based on soil response rates of the reinforcement units corresponding to the reinforcement units, if so, maintaining the original construction arrangement, and if not, dynamically allocating construction resources. Optionally, the specific sub-steps of the first step are: S11, based on the defined reinforcement unit, taking the current construction stage as a reference node, extracting a plurality of groups of soil intensity change curves generated in the past multi-round reinforcement treatment process from historical soil response data of the reinforcement unit, performing trend fitting on a plurality of groups of intensity change curves corresponding to single-round reinforcement treatment, determining strength increase characteristics corresponding to reinforcement treatment, determining a plurality of groups of strength increase characteristics based on multi-round reinforcem