A method for deformation control during close-proximity construction in deep urban spaces

Abstract

A method for deformation control during near-construction in deep urban spaces is proposed, which can effectively control the impact of new structural construction on the surrounding environment and existing structures. Its applicable depth can be extended to depths of 50m. Based on the main structural types in deep urban spaces, namely tunnels and deep shafts, targeted deformation control measures for near-construction are proposed. The full-process deformation design method not only covers the entire life cycle of the project—including resource exploration, design, construction, and operation and maintenance—but also involves all near-construction objects, such as new structures, soil and rock masses, and existing structures, making the method systematic and comprehensive. This design method is applicable to deep spaces, capable of controlling deformation based on the near-construction type of deep structures, and possesses the characteristics of controlling the entire life cycle of near-construction projects and all participating objects. It can be widely applied in near-construction projects in deep urban spaces.

Description

Technical Field

[0001] This invention relates to the field of urban rail and underground engineering design, and in particular to a method for controlling deformation during close-contact construction in deep urban spaces. Background Technology

[0002] As underground spaces evolve from shallow to deep, the interactions between various spatial structures become increasingly complex, leading to more frequent close-contact construction. To ensure structural safety and minimize functional interruptions, higher demands are placed on close-contact construction design theories and methods. Current design methods are mostly applicable to spaces shallower than 50m, with limited application to depths exceeding 50m; the applicability of shallow methods needs further verification. Deep spaces primarily consist of deep shafts and tunnels, with close-contact configurations mainly between tunnels or shafts. Existing deformation control theories are mostly focused on foundation pit deformation control, single-tunnel deformation control, or specific geological formations, lacking specificity for close-contact construction design in deep urban areas. Close-contact construction involves three types of objects: new structures, the soil and rock mass between new and existing structures, and existing structures. Existing deformation control design methods only reinforce individual or combined objects, lacking a systematic approach in both theory and practice. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a method for controlling deformation during close-contact construction in deep urban spaces to overcome or at least partially solve the above problems.

[0004] To address the aforementioned technical problems, the embodiments of this application disclose the following technical solutions:

[0005] A method for controlling deformation during near-construction work in deep urban spaces includes:

[0006] S100. The content required to complete the full resource and environmental survey phase, specifically including: acquisition of engineering geological parameters, hydrogeological parameters, surrounding environment and control conditions;

[0007] The S200 completes the design phase by including: proximity type identification, deformation mechanism understanding, deformation control basis selection, deformation control technology selection, and deformation control mechanism selection.

[0008] S300. The tasks required to complete the construction phase include: developing a monitoring plan, implementing proximity reinforcement measures, analyzing feedback from deformation monitoring, improving reinforcement construction measures, and implementing cyclical construction.

[0009] S400. The tasks required to complete the operation and maintenance phase include: the development of an operation period monitoring plan.

[0010] Furthermore, in S100, the acquisition of engineering geological parameters specifically includes: determination of soil and rock types, quality grades, and geological parameters; soil and rock types include soil strata, rock strata, and soil-rock composite strata; quality grade refers to the surrounding rock grade, which is divided into six levels, I to VI; geological parameters are the physical and mechanical parameters of the soil and rock mass; the acquisition of hydrogeological parameters specifically includes: acquisition of groundwater type, groundwater head, and permeability coefficient; groundwater type is pore water, unconfined water, and confined water; groundwater head represents the unconfined water head and confined water head during construction, as well as the anti-buoyancy design head during operation; permeability coefficient represents the permeability coefficient of the soil and rock mass within the influence range; the acquisition of the surrounding environment specifically includes: acquisition of nearby objects, structural types, proximity distance, importance, and current use status; nearby objects refer to newly constructed structures and existing structures involved in nearby construction. The structural type of the building indicates the dimensions and construction method of the new structure and the existing structure; the proximity distance indicates the relative position of the new structure and the existing structure; the importance level refers to existing codes and standards, and considering the difficulty of construction of deep space structures and the design service life, the importance coefficient of deep space should not be less than 1.0; the current use status indicates the use function and normal use status of the existing structure during the close proximity construction period; control conditions specifically include: planning requirements, control standards and design requirements. Planning requirements indicate whether future plans have a close proximity relationship with the structure under construction and the existing structure, which is a proactive protection provision; control standards indicate the index standards set according to the structural function and safety control requirements, which directly affect the project cost and control measures; design requirements indicate the guidance and constraints on structural design in conjunction with existing codes and standards.

[0011] Furthermore, in S200, proximity type identification includes: parallel tunnels, tunnel overpasses, tunnel underpasses, connecting connections, and other types. Proximity types are identified based on the relative spatial relationship between the new structure and the existing structure. Parallel tunnels refer to tunnels running parallel within the horizontal range and the angle between the active rock and soil fracture angle. Tunnels running parallel outside this range are classified as tunnel overpasses or tunnel underpasses. Tunnel overpasses and tunnel underpasses refer to new tunnels located above or below existing tunnels, including both parallel and intersecting cases. Connecting connections include connections between tunnels and between tunnels and shafts. Other types include all cases that do not belong to the above four types.

[0012] Furthermore, in S200, deformation mechanism cognition includes: identification of soil and rock deformation mechanisms, identification of deformation mechanisms of newly constructed structures, and identification of deformation mechanisms of existing structures. Deformation mechanism cognition is carried out through numerical simulation and model tests. After the proximity type identification work is completed, the deformation mechanisms of soil and rock, newly constructed structures, and existing structures under each proximity type are identified and confirmed. Among them, soil and rock deformation mechanisms include rebound type, subsidence type, lateral displacement type, and composite type; deformation mechanisms of newly constructed structures include vertical compression type, horizontal compression type, and eccentric compression type; deformation mechanisms of existing structures include arch crown subsidence, arch crown uplift, arch waist convergence, arch waist expansion, and uneven deformation.

[0013] Furthermore, in S200, the basis for deformation control includes: deformation control standards, proximity influence zones, and safety distance reservations. Deformation control is the premise and foundation for design and the basis for formulating construction monitoring plans, playing an irreplaceable and important role. Deformation control standards include deformation control standards for new structures and deformation control standards for existing structures. Proximity influence zones are divided into influence areas based on proximity type, soil and rock mass level, and relative distance, including three types of zones: strongly influenced zones, generally influenced zones, and no-influence zones. Safety distance reservations are based on the safety distance division according to proximity type and soil and rock mass level. When the relative distance is greater than this range, no additional reinforcement measures are required except for the necessary measures in the normal design.

[0014] Furthermore, deformation control technologies provide corresponding measures for new structures, existing structures, soil and rock masses, and groundwater, which can be selected according to the actual situation during the design process. These include open-cut deep space reinforcement technology, cut-and-cover deep space reinforcement technology, mechanical deep space reinforcement technology, groundwater control technology, and existing structure reinforcement technology; among which:

[0015] The open-cut method for reinforcing deep spaces includes soil and rock deformation control and stability and deformation control of new chambers. Soil and rock deformation control methods include MJS, RJP, N-JET shotcrete reinforcement, CSM, TRD mixing reinforcement, ultra-deep diaphragm walls, ultra-deep bored piles, and full-casing cast-in-place pile isolation reinforcement. Stability and deformation control methods for new chambers include ultra-deep diaphragm walls, full-casing cast-in-place piles, reverse construction method, freezing method, MJS, RJP, N-JET, CSM, TRD, modern pneumatic caisson method, segmented excavation, transverse concrete support, and automatic servo active control system.

[0016] The deep space reinforcement technology for new underground tunnels includes soil and rock deformation control and stability and deformation control of newly built underground tunnel chambers. Soil and rock deformation control methods include freezing, grouting, jet grouting, large pipe roof with small guide pipes, advanced anchor bolts, and new pipe drapes. Stability and deformation control methods for newly built tunnel chambers include sectional excavation, anchor spraying support, and secondary concrete lining.

[0017] Mechanical methods for reinforcing new deep spaces include controlling the deformation of soil and rock mass and controlling the stability and deformation of new chambers. Methods for controlling the deformation of soil and rock mass include freezing, grouting, jet grouting, mixing, and pipe roof / pipe curtain. Methods for controlling the stability and deformation of new chambers include following grouting, secondary grouting, controlling tunneling speed, selecting mechanical equipment, and controlling tunneling pressure.

[0018] Groundwater control technologies include structural dewatering systems, freezing methods, grouting methods, water-stop curtains, underwater excavation, and integrated pumping and irrigation.

[0019] Existing structural reinforcement technologies include external structural support, internal structural support, pile foundation support, steel support and trolley reinforcement, steel ingot counterweight reinforcement, and new structural lining reinforcement.

[0020] Furthermore, in S200, the deformation control mechanism is an explanation of the principle of deformation control technology, which describes and judges the deformation control technology from a theoretical perspective. The deformation control mechanism includes the deformation control mechanism for various technical measures in the open-cut deep space reinforcement technology, the cut-and-cover deep space reinforcement technology, the mechanical method for deep space reinforcement, groundwater control technology, and existing structure reinforcement technology.

[0021] Furthermore, in S300, the monitoring plan is formulated based on deformation control standards, including comprehensive monitoring of the soil and rock mass, new structures, and existing structures in close proximity; this includes monitoring plans for soil and rock mass, new structures, and existing structures; implementation of proximity reinforcement measures, based on the deformation control technologies selected in the design, including the implementation of soil and rock mass reinforcement plans, new structure reinforcement plans, and existing structure reinforcement plans; deformation monitoring feedback analysis, based on the on-site monitoring data, using numerical simulation to conduct feedback analysis on construction steps and deformation control measures to meet design standard requirements, including feedback analysis of soil and rock mass, new structures, and existing structures; improvement of reinforcement construction measures, based on the feedback analysis results, improving on-site construction measures to ensure control effectiveness, including improvements to soil and rock mass reinforcement measures, new structure reinforcement measures, and existing structure reinforcement measures; and cyclical construction, through continuous monitoring, feedback analysis, and improvement of construction measures until completion.

[0022] Furthermore, in S400, the operation period monitoring plan is formulated. Based on the deformation control standards, the operation and maintenance period monitoring plan is developed, which includes full-object monitoring of the soil and rock mass, new structures, and existing structures in close proximity, analyzing the long-term effects of reinforcement measures, and completing the full life cycle design of the project.

[0023] The present invention also discloses an electronic device, comprising:

[0024] Memory is used to store instructions that can be executed by the processor;

[0025] A processor is used to execute the instructions to implement the above-described method for deformation control during close-contact construction in deep urban spaces.

[0026] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0027] This invention proposes a method for deformation control during near-construction in deep urban spaces, effectively controlling the impact of new construction on the surrounding environment and existing structures. Its applicable depth can be extended to depths of 50m. Based on the main structural types in deep urban spaces, namely tunnels and deep shafts, targeted deformation control measures for near-construction are proposed. The full-process deformation design method not only covers the entire life cycle of the project—including resource exploration, design, construction, and operation and maintenance—but also involves all near-construction objects, such as new structures, soil and rock masses, and existing structures, making the method systematic and comprehensive. In summary, this design method is applicable to deep spaces, capable of controlling deformation based on the near-construction type of deep structures, and possesses the characteristics of controlling the entire life cycle of near-construction projects and all participating objects. It can be widely applied in near-construction projects in deep urban spaces.

[0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a flowchart of a method for controlling deformation during close-contact construction in deep urban spaces, as described in Embodiment 1 of the present invention. Detailed Implementation

[0031] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0032] To address the problems existing in the prior art, embodiments of the present invention provide a method for controlling deformation during close-contact construction in deep urban spaces.

[0033] Example 1

[0034] This embodiment discloses a method for controlling deformation during near-construction in deep urban spaces. The method comprises four stages: (1) Stage 1: Comprehensive resource and environmental survey stage; (2) Stage 2: Design stage; (3) Stage 3: Construction stage; (4) Stage 4: Operation and maintenance stage. Specifically, as follows... Figure 1 ,include:

[0035] S100. The content required to complete the full resource and environmental survey phase, specifically including: acquisition of engineering geological parameters, hydrogeological parameters, surrounding environment and control conditions;

[0036] In S100 of this embodiment, the acquisition of engineering geological parameters specifically includes: determining the soil and rock type, quality grade, and geological parameters; the soil and rock type includes soil strata, rock strata, and soil-rock composite strata; the quality grade refers to the surrounding rock grade, which is divided into six levels, I to VI; the geological parameters are the physical and mechanical parameters of the soil and rock mass; the acquisition of hydrogeological parameters specifically includes: acquiring the groundwater type, groundwater head, and permeability coefficient; the groundwater type is pore water, unconfined water, and confined water; the groundwater head represents the unconfined water head and confined water head during construction, as well as the anti-buoyancy design head during operation; the permeability coefficient represents the permeability coefficient of the soil and rock mass within the influence range; the acquisition of the surrounding environment specifically includes: acquiring the proximity objects, structural type, proximity distance, importance, and current use status; the proximity objects represent newly constructed structures and existing structures involved in the nearby construction. The structural type of the building indicates the dimensions and construction method of the new structure and the existing structure; the proximity distance indicates the relative position of the new structure and the existing structure; the importance level refers to existing codes and standards, and considering the difficulty of construction of deep space structures and the design service life, the importance coefficient of deep space should not be less than 1.0; the current use status indicates the use function and normal use status of the existing structure during the close proximity construction period; control conditions specifically include: planning requirements, control standards and design requirements. Planning requirements indicate whether future plans have a close proximity relationship with the structure under construction and the existing structure, which is a proactive protection provision; control standards indicate the index standards set according to the structural function and safety control requirements, which directly affect the project cost and control measures; design requirements indicate the guidance and constraints on structural design in conjunction with existing codes and standards.

[0037] Specifically, the tasks to be completed in Phase 1 – the comprehensive resource and environmental survey phase include:

[0038] 1) 101 Engineering Geology, including 101-1 Soil and Rock Type, 101-2 Quality Grade, and 101-3 Geological Parameters;

[0039] Among them: 101-1 Soil and rock types include soil strata, rock strata, and soil-rock composite strata; 101-2 Quality grade refers to the surrounding rock grade, which can be referenced from existing rock mass classification standards, and the surrounding rock grade is divided into six levels, I to VI. 101-3 Geological parameters mainly refer to the physical and mechanical parameters of the soil and rock mass.

[0040] 2) 102 Hydrogeology, including 102-1 Groundwater Type, 102-2 Groundwater Head, and 102-3 Permeability Coefficient;

[0041] Among them: 102-1 Groundwater type mainly refers to pore water, unconfined water and confined water; 102-2 Groundwater head refers to the unconfined water head and confined water head during construction and the anti-buoyancy design head during operation; 102-3 Permeability coefficient mainly refers to the permeability coefficient of the soil and rock mass within the influence range.

[0042] 3) 103 Surrounding Environment, including 103-1 Nearby Objects, 103-2 Structural Type, 103-3 Proximity, 103-4 Importance, and 103-5 Current Usage Status;

[0043] Among them: 103-1 Proximity objects refer to the newly constructed structures and existing buildings involved in the nearby construction; 103-2 Structural type refers to the structural dimensions and construction method (integral casting or prefabrication) of the newly constructed structures and existing buildings; 103-3 Proximity distance refers to the relative positional relationship between the newly constructed structures and existing buildings; 103-4 Importance can refer to existing specifications and standards, but considering the difficulty of deep space structure construction and the design service cycle, the importance coefficient of deep space should not be less than 1.0; 103-5 Current use status refers to the use function and normal use status of the existing buildings during the nearby construction period.

[0044] 4) 104-Control conditions, including 104-1 planning requirements, 104-2 control standards, and 104-3 design requirements.

[0045] Among them: 104-1 Planning Requirements refers to whether future plans are closely related to the structures under construction and existing structures, and is a guide for proactive protection measures; 104-2 Control Standards refers to the indicator standards set according to the structural functions and safety control requirements, which directly affect the project cost and control measures; 104-3 Design Requirements refers to the guidance and constraints on structural design in conjunction with existing specifications and standards.

[0046] The S200 completes the design phase, which includes: identification of proximity types, understanding of deformation mechanisms, selection of deformation control criteria, selection of deformation control technologies, and selection of deformation control mechanisms.

[0047] Specifically, the tasks to be completed in Phase 2 - the design phase include:

[0048] 1) 201 proximity type identification, including 201-1 parallel tunnel, 201-2 tunnel overpass, 201-3 tunnel underpass, 201-4 connecting and connecting, and 201-5 other types;

[0049] Among them: 201 Proximity type is mainly identified based on the relative spatial position relationship between the new structure and the existing structure; 201-1 Parallel tunnels mainly refer to parallel tunnels within the horizontal range and the angle between the active rock and soil fracture angles. Parallel tunnels outside this range are classified as 201-1 or 201-2; 201-2 Tunnel overpass and 201-3 Tunnel underpass refer to the new tunnel being located above or below the existing tunnel, including both parallel and intersecting situations; 201-4 Connecting connections include connecting connections between tunnels and between tunnels and shafts; 201-5 Other types include all situations that do not belong to the above four types.

[0050] 2) Understanding the deformation mechanism of 202, including the identification of the deformation mechanism of soil and rock mass in 202-1, the identification of the deformation mechanism of newly built structures in 202-2, and the identification of the deformation mechanism of existing structures in 202-3.

[0051] Specifically, the understanding of deformation mechanisms in section 202 was primarily achieved through numerical simulation and model testing. Following the completion of the proximity type identification work in section 201, the deformation mechanisms of soil and rock mass (section 202-1), newly constructed structures (section 202-2), and existing structures (section 202-3) under each proximity type were identified and confirmed. Specifically, the deformation mechanisms of soil and rock mass in section 202-1 include rebound, subsidence, lateral displacement, and composite types; the deformation mechanisms of newly constructed structures in section 202-2 include vertical compression, horizontal compression, and eccentric compression; and the deformation mechanisms of existing structures in section 202-3 include crown subsidence, crown uplift, arch waist convergence, arch waist expansion, and uneven deformation.

[0052] 3) 203 Deformation control basis, including 203-1 Deformation control standard, 203-2 Proximity influence zone, and 203-3 Safety distance reservation;

[0053] Among them: 202 Deformation control basis is the premise and foundation for design, and the basis for formulating construction monitoring plan, playing an irreplaceable and important role; 203-1 Deformation control standard includes the deformation control standard for new structure construction and the deformation control standard for existing structure; 203-2 Proximity influence zoning is based on proximity type, soil and rock level, and relative distance to divide the influence area, including three types of zoning: strong influence area, general influence area, and no influence area; 203-3 Safety distance reservation is based on the safety distance division according to proximity type and soil and rock level. When the relative distance is greater than this range, no additional reinforcement measures need to be taken except for the necessary measures in normal design.

[0054] 4) 204 Deformation control technology, including 204-1 Open-cut method for deep space reinforcement, 204-2 Tunneling method for deep space reinforcement, 204-3 Mechanical method for deep space reinforcement, 204-4 Groundwater control technology, and 204-5 Existing structure reinforcement technology;

[0055] Among them, the 204 deformation prevention and control technology provides corresponding measures for new structures, existing structures, soil and rock masses and groundwater, which can be selected according to the actual situation during the design.

[0056] The 204-1 Open-cut method for reinforcing new deep spaces includes soil and rock deformation control and new chamber stability and deformation control. Soil and rock deformation control methods include shotcrete reinforcement such as MJS, RJP, and N-JET, CSM and TRD mixing reinforcement, ultra-deep diaphragm walls, ultra-deep bored piles, and full-casing cast-in-place piles. New chamber stability and deformation control methods include ultra-deep diaphragm walls, full-casing cast-in-place piles, reverse construction method, freezing method, MJS, RJP, N-JET, CSM, TRD, modern pneumatic caisson method, segmented excavation, transverse concrete support, and automatic servo active control system.

[0057] The 204-2 technology for reinforcing new deep spaces using the cut-and-cover method includes soil and rock deformation control and stability and deformation control of newly constructed tunnels. Soil and rock deformation control methods include freezing, grouting, jet grouting, large pipe roof with small guide pipes, advanced anchor bolts, and new pipe curtain method. Stability and deformation control methods for newly constructed tunnels include sectional excavation, anchor spraying support, and secondary concrete lining.

[0058] The 204-3 mechanical method for reinforcing new deep spaces includes soil and rock deformation control and new chamber stability and deformation control. Soil and rock deformation control methods include freezing, grouting, jet grouting, mixing, and pipe roof / pipe curtain methods. New chamber stability and deformation control methods include follow-up grouting, secondary grouting, controlling tunneling speed, selecting mechanical equipment, and controlling tunneling pressure.

[0059] 204-4 Groundwater control technologies include structural dewatering systems, freezing methods, grouting methods, water-stop curtains, underwater excavation, and integrated pumping and irrigation.

[0060] 204-5 Existing structural reinforcement technologies include external structural support, internal structural support, pile foundation support, steel support and trolley reinforcement, steel ingot and other counterweight reinforcement, and new structural lining reinforcement.

[0061] 5) 205 Deformation control mechanism, which includes the deformation control mechanism for various technical measures in 204-1 Open-cut method for deep space reinforcement, 204-2 Tunneling method for deep space reinforcement, 204-3 Mechanical method for deep space reinforcement, 204-4 Groundwater control technology, and 204-5 Existing structure reinforcement technology.

[0062] Among them, the 205 deformation control mechanism is a principle explanation of the 204 deformation control technology, which describes and judges the deformation control technology from a theoretical perspective.

[0063] The 204-1 open-cut method for new deep space reinforcement technology includes soil and rock deformation control and new chamber stability and deformation control. Its deformation control mechanism is shown in Table 1.

[0064] Table 1. Statistical Table of Reinforcement Technology and Deformation Control Mechanism for Newly Constructed Deep Space Using the Open-Cut Method (204-1)

[0065]

[0066] The 204-2 underground excavation method for reinforcing new deep spaces includes soil and rock deformation control and stability and deformation control of newly constructed underground chambers. The deformation control mechanism is shown in Table 2.

[0067] Table 2.2 Statistical Table of Reinforcement Technology and Deformation Control Mechanism for Newly Constructed Deep Space Using the Cut-and-Run Method (204-2)

[0068]

[0069] The 204-3 mechanical method for reinforcing new deep spaces includes soil and rock deformation control and stability and deformation control of newly constructed underground chambers. The deformation control mechanism is shown in Table 3.

[0070] Table 3. Statistical Table of Mechanical Methods for Strengthening New Deep Space Structures and Their Deformation Control Mechanisms (204-3)

[0071]

[0072] The deformation control mechanism of the 204-4 groundwater control technology is shown in Table 4.

[0073] Table 4. Statistical Table of Existing Structure Strengthening Technologies and Deformation Control Mechanisms (204-4)

[0074]

[0075] The deformation control mechanism of the existing structural reinforcement technology 204-5 is shown in Table 5.

[0076] Table 5. Statistical Table of Existing Structure Strengthening Technologies and Deformation Control Mechanisms (204-5)

[0077]

[0078] S300. The tasks required to complete the construction phase include: developing a monitoring plan, implementing proximity reinforcement measures, analyzing feedback from deformation monitoring, improving reinforcement construction measures, and implementing cyclical construction. In S300 of this embodiment, the monitoring plan is developed based on deformation control standards, including comprehensive monitoring of the soil and rock mass, new structures, and existing structures. This includes monitoring plans for the soil and rock mass, new structures, and existing structures. The proximity reinforcement measures are implemented on-site based on the deformation control technologies selected in the design, including the implementation of soil and rock reinforcement plans. The process includes: implementation of reinforcement schemes for new and existing structures; deformation monitoring and feedback analysis, using numerical simulation to analyze construction steps and deformation control measures based on on-site monitoring data to meet design standards, including feedback analysis of soil and rock masses, new structures, and existing structures; improvement of reinforcement construction measures, based on feedback analysis results to ensure control effectiveness, including improvements to soil and rock reinforcement measures, new structures, and existing structures; and cyclical construction, through continuous monitoring, feedback analysis, and improvement of construction measures until completion.

[0079] Specifically, the tasks to be completed in Phase 3 - the construction phase include:

[0080] 1) Development of monitoring plans for 301, including monitoring plan for soil and rock mass (301-1), monitoring plan for newly built structures (301-2), and monitoring plan for existing structures (301-3);

[0081] Note: Based on the 203-1 deformation control standard, a construction period monitoring plan was developed, which includes full-object monitoring of soil and rock mass, new structures, and existing structures in close proximity.

[0082] 2) Implementation of 302 proximity reinforcement measures, including the implementation of the 302-1 soil and rock mass reinforcement scheme, the 302-2 new structure reinforcement scheme, and the 302-3 existing structure reinforcement scheme;

[0083] Note: The 204 deformation control technology selected in the design will be implemented on-site.

[0084] 3) 303 Deformation monitoring feedback analysis, including 303-1 Soil and rock mass feedback analysis, 303-2 New structure feedback analysis, and 303-3 Existing structure feedback analysis;

[0085] Note: Based on on-site monitoring data, numerical simulation was used to conduct feedback analysis on construction steps and deformation control measures to meet design standard requirements.

[0086] 4) Improvements to 304 reinforcement construction measures, including improvements to 304-1 soil and rock reinforcement measures, 304-2 new structure reinforcement measures, and 304-3 existing structure reinforcement measures;

[0087] Note: Improve on-site construction measures based on feedback analysis results to ensure control effectiveness.

[0088] 5) 305 cycle construction, carry out the above steps until the project is completed.

[0089] Note: Through continuous monitoring, feedback analysis, and improvement of construction measures, the project will be completed.

[0090] S400. The tasks required to complete the operation and maintenance phase include: developing an operation and maintenance monitoring plan. Specifically, based on deformation control standards, a monitoring plan for the operation and maintenance phase will be developed, including comprehensive monitoring of the soil and rock mass, newly constructed structures, and existing structures in close proximity; analysis of the long-term effects of reinforcement measures; and completion of the project's full life-cycle design.

[0091] This embodiment discloses a method for controlling near-contact deformation during construction in deep urban spaces, including: completing the tasks required for the full resource and environmental survey stage, specifically including: acquiring engineering geological parameters, hydrogeological parameters, surrounding environment, and control conditions; completing the tasks required for the design stage, specifically including: identifying proximity types, understanding deformation mechanisms, selecting deformation control basis, selecting deformation control technology, and selecting deformation control mechanisms; completing the tasks required for the construction stage, specifically including: formulating monitoring plans, implementing proximity reinforcement measures, analyzing feedback from deformation monitoring, improving reinforcement construction measures, and implementing cyclical construction; and completing the tasks required for the operation and maintenance stage, specifically including: formulating an operation period monitoring plan.

[0092] This embodiment can effectively control the impact of new structural construction on the surrounding environment and existing structures during near-construction. Its applicable depth can be extended to depths of 50m. Considering the main structural types in deep urban spaces, namely tunnels and deep shafts, targeted deformation control measures for near-construction are proposed. The full-process deformation design method not only covers the entire life cycle of the project—including resource exploration, design, construction, and operation and maintenance—but also involves all near-construction objects, such as new structures, soil and rock masses, and existing structures, making the method systematic and comprehensive. In summary, this design method is applicable to deep spaces, capable of controlling deformation for near-construction types arising from deep structures, and possesses the characteristics of controlling the entire life cycle of near-construction projects and all participating objects. It can be widely applied in near-construction projects in deep urban spaces.

[0093] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0094] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0095] Those skilled in the art will also understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments herein can be implemented as electronic hardware, computer software, or a combination thereof. To clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in alternative ways for each specific application; however, such implementation decisions should not be construed as departing from the scope of this disclosure.

[0096] The steps of the methods or algorithms described in conjunction with the embodiments herein can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software modules can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and storage medium can exist as discrete components in the user terminal.

[0097] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. This software code can be stored in memory units and executed by a processor. The memory units can be implemented within the processor or outside the processor; in the latter case, they are communicatively coupled to the processor via various means, as is well known in the art.

[0098] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A method for deformation control of urban deep space close construction, characterized in that, include: S100. The content required to complete the full resource and environmental survey phase, specifically including: acquisition of engineering geological parameters, hydrogeological parameters, surrounding environment and control conditions; S200. The content required to complete the design phase includes: identification of proximity types, understanding of deformation mechanisms, selection of deformation control basis, selection of deformation control technology, and selection of deformation control mechanism; Deformation control technologies provide corresponding measures for new structures, existing structures, soil and rock masses, and groundwater. These can be selected based on actual conditions during the design process. These include open-cut deep space reinforcement technology, cut-and-cover deep space reinforcement technology, mechanical deep space reinforcement technology, groundwater control technology, and existing structure reinforcement technology; among which: The open-cut method for reinforcing deep spaces includes soil and rock deformation control and stability and deformation control of new chambers. Soil and rock deformation control methods include MJS, RJP, N-JET shotcrete reinforcement, CSM, TRD mixing reinforcement, ultra-deep diaphragm walls, ultra-deep bored piles, and full-casing cast-in-place pile isolation reinforcement. Stability and deformation control methods for new chambers include ultra-deep diaphragm walls, full-casing cast-in-place piles, reverse construction method, freezing method, MJS, RJP, N-JET, CSM, TRD, modern pneumatic caisson method, segmented excavation, transverse concrete support, and automatic servo active control system. The deep space reinforcement technology for new underground tunnels includes soil and rock deformation control and stability and deformation control of newly built underground tunnel chambers. Soil and rock deformation control methods include freezing, grouting, jet grouting, large pipe roof with small guide pipes, advanced anchor bolts, and new pipe drapes. Stability and deformation control methods for newly built tunnel chambers include sectional excavation, anchor spraying support, and secondary concrete lining. Mechanical methods for reinforcing new deep spaces include controlling the deformation of soil and rock mass and controlling the stability and deformation of new chambers. Methods for controlling the deformation of soil and rock mass include freezing, grouting, jet grouting, mixing, and pipe roof / pipe curtain. Methods for controlling the stability and deformation of new chambers include following grouting, secondary grouting, controlling tunneling speed, selecting mechanical equipment, and controlling tunneling pressure. Groundwater control technologies include structural dewatering systems, freezing methods, grouting methods, water-stop curtains, underwater excavation, and integrated pumping and irrigation. Existing structural reinforcement technologies include external structural support, internal structural support, pile foundation support, steel support and trolley reinforcement, steel ingot counterweight reinforcement, and new structural lining reinforcement. S300. The tasks required to complete the construction phase include: developing a monitoring plan, implementing proximity reinforcement measures, analyzing feedback from deformation monitoring, improving reinforcement construction measures, and implementing cyclical construction. S400. The tasks required to complete the operation and maintenance phase include: the development of an operation period monitoring plan.

2. The method for deformation control of urban deep space proximity construction according to claim 1, characterized in that, In S100, the acquisition of engineering geological parameters specifically includes: determination of soil and rock types, quality grades, and geological parameters; soil and rock types include soil strata, rock strata, and soil-rock composite strata; quality grade refers to the surrounding rock grade, which is divided into six levels, I to VI; geological parameters are the physical and mechanical parameters of the soil and rock mass; the acquisition of hydrogeological parameters specifically includes: acquisition of groundwater type, groundwater head, and permeability coefficient; groundwater type is pore water, unconfined water, and confined water; groundwater head represents the unconfined water head and confined water head during construction, as well as the anti-buoyancy design head during operation; permeability coefficient represents the permeability coefficient of the soil and rock mass within the influence area; the acquisition of the surrounding environment specifically includes: acquisition of nearby objects, structural types, proximity distance, importance, and current use status; nearby objects refer to newly constructed structures and existing buildings involved in the nearby construction. The structural type indicates the dimensions and construction method of the new structure and existing structures; the proximity distance indicates the relative position of the new structure and existing structures; the importance level refers to existing codes and standards, and considering the difficulty of deep space structure construction and the design service life, the importance coefficient of deep space should not be less than 1.0; the current use status indicates the use function and normal use status of the existing structures during the close proximity construction period; the control conditions specifically include: planning requirements, control standards, and design requirements. Planning requirements indicate whether future plans have a close proximity relationship with the structure under construction and the existing structure, and are a kind of proactive protection reserve measure guide; control standards indicate the index standards set according to the structural function and safety control requirements, which directly affect the project cost and control measures; design requirements indicate the guidance and constraints on structural design in combination with existing codes and standards.

3. The method for controlling deformation during near-construction work in deep urban spaces as described in claim 1, characterized in that, In S200, proximity type identification includes: parallel tunnels, tunnel overpasses, tunnel underpasses, connecting connections, and other types. Proximity types are identified based on the relative spatial relationship between the new structure and the existing structure. Parallel tunnels refer to tunnels running parallel within the horizontal range and the angle between the active rock and soil fracture angle. Tunnels running parallel outside this range are classified as tunnel overpasses or tunnel underpasses. Tunnel overpasses and tunnel underpasses refer to new tunnels located above or below existing tunnels, including both parallel and intersecting cases. Connecting connections include connections between tunnels and between tunnels and shafts. Other types include all cases that do not belong to the above four types.

4. The method for controlling deformation during near-construction work in deep urban spaces as described in claim 1, characterized in that, In S200, deformation mechanism recognition includes: identification of soil and rock deformation mechanisms, identification of deformation mechanisms of newly constructed structures, and identification of deformation mechanisms of existing structures. Deformation mechanism recognition is achieved through numerical simulation and model testing. After the proximity type identification work is completed, the deformation mechanisms of soil and rock, newly constructed structures, and existing structures under each proximity type are identified and confirmed. Among them, soil and rock deformation mechanisms include rebound, settlement, lateral displacement, and composite types; deformation mechanisms of newly constructed structures include vertical compression, horizontal compression, and eccentric compression; deformation mechanisms of existing structures include crown settlement, crown uplift, arch waist convergence, arch waist expansion, and uneven deformation.

5. The method for controlling deformation during near-construction work in deep urban spaces as described in claim 1, characterized in that, In S200, deformation control is based on: deformation control standards, proximity influence zones, and safety distance reservations. Deformation control is the premise and foundation for design and the basis for formulating construction monitoring plans, playing an irreplaceable and important role. Deformation control standards include deformation control standards for new structures and deformation control standards for existing structures. Proximity influence zones are divided into three categories based on proximity type, soil and rock mass level, and relative distance: strongly influential zones, generally influential zones, and no-influence zones. Safety distance reservations are based on proximity type and soil and rock mass level. When the relative distance exceeds this range, no additional reinforcement measures are required except for the necessary measures in the normal design.

6. The method for controlling deformation during near-construction work in deep urban spaces as described in claim 1, characterized in that, In S200, the deformation control mechanism is an explanation of the principle of deformation control technology, which describes and judges the deformation control technology from a theoretical perspective. The deformation control mechanism includes the deformation control mechanism for various technical measures in the open-cut deep space reinforcement technology, the cut-and-cover deep space reinforcement technology, the mechanical method for deep space reinforcement, groundwater control technology, and existing structure reinforcement technology.

7. The method for controlling deformation during near-construction work in deep urban spaces as described in claim 1, characterized in that, In S300, the monitoring plan is formulated based on deformation control standards. The construction period monitoring plan includes comprehensive monitoring of the soil and rock mass, new structures, and existing structures in close proximity. This includes monitoring plans for soil and rock mass, new structures, and existing structures. The implementation of proximity reinforcement measures involves on-site implementation based on the deformation control technologies selected in the design. This includes the implementation of soil and rock mass reinforcement plans, new structure reinforcement plans, and existing structure reinforcement plans. Deformation monitoring feedback analysis: Based on on-site monitoring data, numerical simulation is used to conduct feedback analysis on construction steps and deformation control measures to meet design standards. This includes feedback analysis of soil and rock masses, feedback analysis of new structures, and feedback analysis of existing structures. Improvement of reinforcement construction measures: Based on the feedback analysis results, on-site construction measures are improved to ensure control effectiveness. This includes improvements to soil and rock reinforcement measures, improvements to new structure reinforcement measures, and improvements to existing structure reinforcement measures. Cyclic construction: Through continuous monitoring, feedback analysis, and improvement of construction measures, construction is carried out until completion.

8. The method for controlling deformation during near-construction work in deep urban spaces as described in claim 1, characterized in that, In S400, the operation period monitoring plan is formulated. Based on the deformation control standard, the operation and maintenance period monitoring plan is developed, which includes full-object monitoring of soil and rock mass, new structures, and existing structures in close proximity, analyzing the long-term effects of reinforcement measures, and completing the full life cycle design of the project.

9. An electronic device, characterized in that, include: Memory is used to store instructions that can be executed by the processor; A processor for executing the instructions to implement a method for deformation control during close-contact construction in deep urban spaces as described in any one of claims 1-8.

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