Subsidiary side self-bearing structure of newly-built project connecting with underground operation station and reconstruction method
By utilizing the self-supporting structure on each side and the layered demolition method, the construction risks and difficulties of connecting underground works within the operating station were solved by leveraging the bearing capacity of concrete, thus achieving safe and efficient structural connection and spatial connectivity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA RAILWAY DESIGN GRP CO LTD
- Filing Date
- 2026-01-30
- Publication Date
- 2026-06-12
AI Technical Summary
When carrying out underground engineering connections within operating stations, existing technologies face challenges such as high construction risks, demanding site requirements, significant construction difficulties, and long construction periods. In particular, it is difficult to achieve safe and reliable structural connections in confined spaces and complex geological conditions.
The structure adopts a split-side self-supporting structure. By demolishing the inner and outer areas of the station side walls in layers, the bearing capacity of the concrete itself is used to set up columns and beams with openings in the side walls of the newly built operating station to form temporary load-bearing components. This avoids the need for external temporary supports and achieves structural force transfer and spatial connectivity.
When the station is in operation, it reduces construction difficulty, shortens the construction period, lowers costs, and ensures construction safety and risk controllability, making it suitable for deep connection projects under complex geological conditions.
Smart Images
Figure CN121593500B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of underground engineering infrastructure, and in particular, it relates to a self-supporting structure and modification method for connecting new construction projects to underground operating stations. Background Technology
[0002] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.
[0003] Currently, urban underground space construction is developing rapidly, urban underground rail transit networks are constantly being added, and various underground projects are constantly emerging that connect with existing underground projects. This involves the renovation of existing projects. Since existing projects have formed a load-bearing system, the later renovation is equivalent to destroying the existing load-bearing system and then rebuilding it, which poses great construction and social risks.
[0004] In existing literature and patent documents, when a new underground project connects to an underground station and involves openings in the station's side walls, temporary supports are generally added as auxiliary components to carry out the side wall openings in order to meet the load-bearing capacity requirements of the station's side walls during the construction phase.
[0005] When the station site has ample space, temporary supports are added between the upper and lower slabs to transfer the load from the wall to the temporary support system. Then, beam and column reinforcement components are implemented around the opening, ultimately transforming the side wall into a beam-column load-bearing system. This approach increases costs and places higher demands on the construction site. When the station site is limited, temporary supports are added between the side walls where the opening is to be made, transferring the load from the wall to the temporary support system. During the construction of the top beam of the opening, the issue of the beam reinforcement intersecting with the temporary supports needs to be addressed during the rebar binding process. Some of the added temporary supports will be embedded in the newly poured beam, posing a risk of them falling off. Therefore, the added temporary supports must be connected to the beam reinforcement. These methods for handling openings in the exterior walls of operating stations, using temporary supports within limited construction space, increase the technical and operational difficulty, and extend the construction site requirements and timeframe. Summary of the Invention
[0006] In response to the aforementioned problems, this invention proposes a self-supporting structure and modification method for connecting newly constructed underground subway stations. It primarily addresses the underground portions of later-developed projects, such as municipal facilities, commercial or residential buildings, that need to connect to existing operational subway stations. These operational subway stations were not initially planned for such connections. These underground structures require reliable structural connection technologies for proper connection, ensuring the integrity and rational utilization of underground space while guaranteeing the structural safety and risk controllability of the underground connection project.
[0007] The technical solution of the present invention is as follows:
[0008] A self-supporting structure for connecting a newly constructed underground operating station includes an operating underground station. The operating underground station is provided with an interconnected station enclosure structure and station side walls. A connecting opening is formed in the station side walls after excavation. A passageway is also formed at the corresponding position of the station enclosure structure and the connecting opening.
[0009] The walls surrounding the connection opening are provided with columns and beams for opening the side walls of the newly built operating station. The side walls of the station are connected to the side walls of the newly built underground project through the columns and beams for opening the side walls of the newly built operating station, forming a new underground project connected to the operating underground station. The outer side of the new underground project is provided with a retaining wall for the foundation pit of the new underground project.
[0010] Preferably, the station sidewall includes an inner area and an outer area.
[0011] The newly constructed operating station side wall opening columns include the newly constructed operating station side wall inner side column set in the inner area of the station side wall and the newly constructed operating station side wall outer side column set in the outer area of the station side wall;
[0012] The newly constructed operating station side wall opening beam includes an inner side beam installed in the inner area of the station side wall and an outer side beam installed in the outer area of the station side wall.
[0013] The inner columns of the side wall of the newly built operating station are vertically connected to the inner beams of the side wall of the newly built operating station, and the outer columns of the side wall of the newly built operating station are vertically connected to the outer beams of the side wall of the newly built operating station.
[0014] The inner column of the side wall of the newly built operating station is horizontally connected to the outer column of the side wall of the newly built operating station, and the inner beam of the side wall of the newly built operating station is horizontally connected to the outer beam of the side wall of the newly built operating station.
[0015] The second objective of this invention is to provide a method for the side-by-side self-supporting modification of a newly constructed project connecting to an underground operating station. This method utilizes a side-by-side self-supporting structure for the connection of a newly constructed project to an underground operating station, and includes the following steps:
[0016] S1: Determine the external connection location of the underground station in operation, form a passageway on the station enclosure structure, determine the connection opening to be excavated within the station side wall area, and carry out earthwork excavation and groundwater drainage simultaneously with the new underground project. At the same time, construct the new underground project side wall and the new underground project foundation pit enclosure.
[0017] S2: Remove the concrete inside the column area of the station side wall on both sides of the connection opening to be excavated, and remove the concrete inside the beam area of the station side wall above the connection opening to be excavated, while protecting the original wall reinforcement.
[0018] S3: Within the area of the inner side wall of the station in step S2 that has been demolished, promptly tie the steel bars of the beams and columns at the edge of the opening, construct the inner columns and beams of the new operating station side wall, and reserve steel bars;
[0019] S4: After the inner columns and inner beams of the newly built operating station side wall in step S3 reach the design strength, the concrete outside the column range of the outer area of the station side wall on both sides of the connection opening to be excavated is removed, and the concrete outside the beam range of the outer area of the station side wall above the connection opening to be excavated is removed, while protecting the original wall reinforcement.
[0020] S5: Within the area outside the station side wall that has been demolished in step S4, promptly tie the reinforcing bars of the beams and columns at the opening edge, construct the outer columns and beams of the new operating station side wall, and reserve reinforcing bars, which are then connected and anchored with the reserved reinforcing bars in step S3, the protected reinforcing bars in step S2, and the protected reinforcing bars in step S4, and poured to finally form the opening columns and beams of the new operating station side wall, enclosing the connection opening to be excavated;
[0021] S6: After the newly built operating station side wall opening column and the newly built operating station side wall opening beam in step S5 reach the design strength, the wall of the connection opening to be excavated is broken to form the connection opening;
[0022] S7: Connect the columns and beams with openings in the side walls of the newly built operating station to the side walls of the newly built underground project to achieve spatial connectivity between the newly built underground project and the operating underground station.
[0023] Preferably, a temporary water-retaining wall and a temporary construction enclosure should be erected before the construction demolition, and the temporary water-retaining wall and the temporary construction enclosure should be demolished after the spatial connection between the newly built underground project and the operating underground station is achieved.
[0024] Preferably, in step S3, when constructing the inner columns and inner beams of the side walls of the newly built operating station, formwork and scaffolding are not required on the bottom, top, and other three sides, except for the side facing the inner side of the underground station space.
[0025] Preferably, in step S5, when constructing the outer columns and beams of the side walls of the newly built operating station, no formwork or scaffolding is required on the bottom, top, and other three sides, except for the side facing the outer side of the underground station space.
[0026] The beneficial effects of this invention are:
[0027] This invention is applicable to construction under station operation and structural stress conditions, and is particularly suitable for underground engineering projects with large connection depths in complex geological conditions such as loose underground soil and abundant groundwater. It can further eliminate underground construction risks, accelerate construction progress, and avoid or reduce the adverse effects of structural connection operations on existing operating underground stations. Simultaneously, it occupies a small area, saves on scaffolding, formwork, and other engineering materials and procedures, and accelerates construction progress while also saving costs and shortening the construction period. It has high promotional value in all fields of underground structural connection engineering.
[0028] This invention reduces the overall load on the wall by demolishing the inner and outer areas of the station side wall in layers. First, the inner area of the station side wall is demolished, and the vertical load is borne by the outer area of the station side wall. Then, the outer area of the station side wall is demolished, and finally, the opening columns and beams of the newly built operating station side wall are completed, and the connecting opening is opened to complete the connection of the space and structure between the newly built underground project and the operating underground station.
[0029] This invention utilizes a permanent beam-column structural load transfer system and a phased construction approach that involves unloading before construction. This fully leverages the load-bearing capacity of concrete by employing a method that utilizes the inner and outer areas of the station sidewalls, as well as the columns and beams of the newly constructed operating station sidewalls, as temporary load-bearing components during the connection and opening construction. Without relying on other external temporary support components, this significantly reduces construction difficulty, shortens the construction period, and lowers construction investment. This method can be extended to a wider range of sidewall renovations. Attached Figure Description
[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless specifically indicated, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.
[0031] Figure 1 This is a schematic cross-sectional view of the area within the inner column of the station side wall after the concrete has been removed in this invention;
[0032] Figure 2 This is a schematic cross-sectional view of the inner column of the station side wall in this invention;
[0033] Figure 3 This is a schematic cross-sectional view of the area outside the columns of the station side wall after the concrete has been removed in this invention;
[0034] Figure 4 This is a schematic diagram of the cross-section of the outer column of the station side wall in this invention;
[0035] Figure 5 This is a plan view of the area within the inner beam of the station side wall after the concrete has been removed in this invention;
[0036] Figure 6 This is a schematic diagram of the inner beam of the station side wall in this invention;
[0037] Figure 7 This is a plan view of the area outside the beam of the station side wall after the concrete has been removed in this invention;
[0038] Figure 8 This is a schematic diagram of the outer beam of the station side wall in this invention;
[0039] Figure 9 This is a schematic cross-sectional view of the column with opening in the side wall of the station in this invention;
[0040] Figure 10 This is a schematic diagram of the plan view of the opening beam in the station side wall of this invention;
[0041] Figure 11 This is a schematic plan view of the newly constructed underground engineering connecting to the underground station of the present invention;
[0042] In the picture:
[0043] 1-Operating underground station; 2-Station side wall; 3-Scope of new underground works; 4-New underground works; 5-Inner concrete within the column area; 6-Inner concrete within the beam area; 7-Inner column of the new operating station side wall; 8-Inner beam of the new operating station side wall; 9-Outer concrete within the column area; 10-Outer concrete within the beam area; 11-Outer column of the new operating station side wall; 12-Outer beam of the new operating station side wall; 13-Opening column of the new operating station side wall; 14-Opening beam of the new operating station side wall; 15-Connecting opening; 16-Side wall of the new underground works; 17-Station enclosure structure; 18-Excavation enclosure of the new underground works. Detailed Implementation
[0044] First, it should be noted that the specific structure, features, and advantages of the present invention will be described in detail below by way of examples. However, all descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, can still be arbitrarily combined or deleted among these technical features to obtain more other embodiments of the present invention that may not be directly mentioned herein. Additionally, for the sake of simplifying the drawings, the same or similar technical features may be indicated only in one place in the same drawing.
[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0046] The following is in conjunction with the appendix Figure 1 -Appendix Figure 11 This invention will be described in detail.
[0047] Example 1:
[0048] A self-supporting structure for connecting a newly constructed underground operating station includes an operating underground station 1. The operating underground station 1 is provided with a station enclosure structure 17 and a station side wall 2 that are connected to each other. A connecting opening 15 excavated later is formed on the station side wall 2. A passageway is also formed at the corresponding position of the station enclosure structure 17 and the connecting opening 15.
[0049] The surrounding walls of the connecting opening 15 are provided with newly constructed operating station side wall opening columns 13 and newly constructed operating station side wall opening beams 14. The station side wall 2 is connected to the newly constructed underground project side wall 16 through the newly constructed operating station side wall opening columns 13 and newly constructed operating station side wall opening beams 14, forming a newly constructed underground project 4 connected to the operating underground station 1. The outer side of the newly constructed underground project 4 is provided with a newly constructed underground project foundation pit retaining wall 18.
[0050] Working principle:
[0051] This invention reduces the overall load on the wall and utilizes the bearing capacity of the concrete itself to demolish the wall layers in the inner and outer areas of the station side wall 2. At the same time, it integrates the sections to form the newly built operating station side wall opening column 13 and the newly built operating station side wall opening beam 14, thereby improving the load-bearing capacity of the wall before opening the connection opening 15.
[0052] This method utilizes the station side wall 2, the newly constructed operating station side wall opening column 13, and the newly constructed operating station side wall opening beam 14 as temporary load-bearing components during the pre-connection opening construction, eliminating the need for other external temporary support components. This reduces construction difficulty and shortens construction time. The final result is shown in the attached figure. Figure 11 As shown.
[0053] Furthermore, in the embodiments, the station side wall 2 may include an inner area and an outer area.
[0054] The newly constructed operating station side wall opening column 13 includes the newly constructed operating station side wall inner column 7 set in the inner area of the station side wall and the newly constructed operating station side wall outer column 11 set in the outer area of the station side wall;
[0055] The newly constructed operating station side wall opening beam 14 includes an inner side beam 8 of the newly constructed operating station side wall located in the inner area of the station side wall and an outer side beam 12 of the newly constructed operating station side wall located in the outer area of the station side wall;
[0056] The inner column 7 of the side wall of the newly built operating station is vertically connected to the inner beam 8 of the side wall of the newly built operating station, and the outer column 11 of the side wall of the newly built operating station is vertically connected to the outer beam 12 of the side wall of the newly built operating station.
[0057] The inner column 7 of the side wall of the newly built operating station is horizontally connected to the outer column 11 of the side wall of the newly built operating station, and the inner beam 8 of the side wall of the newly built operating station is horizontally connected to the outer beam 12 of the side wall of the newly built operating station.
[0058] In this embodiment, the station side wall 2 is divided into an inner area and an outer area, and then demolished layer by layer. This layered demolition method can further improve the stability when demolishing the wall.
[0059] Example 2:
[0060] A method for the side-by-side self-supporting modification of a newly constructed project connecting to an underground operating station, employing a side-by-side self-supporting structure for the connection of the newly constructed project to the underground operating station, includes the following steps:
[0061] S1: Determine the external connection location of the underground station 1, form a passageway on the station enclosure structure 17, determine the connection opening 15 to be excavated within the station side wall 2, and carry out earthwork excavation and groundwater drainage simultaneously with the new underground project 4. At the same time, construct the new underground project side wall 16 and the new underground project foundation pit enclosure 18 for the new underground project 4.
[0062] In step S1, before carrying out the side wall opening renovation, a thorough investigation and assessment should be conducted on the geological environment, structural design, equipment system, pipelines, decoration, etc. of the existing underground station 1, so that the various safety indicators and functions of the station can meet the requirements of normal operation of the station during the renovation.
[0063] After meeting the requirements, the location of the new underground project 3 is determined in conjunction with the site planning and underground space layout. Then, the connection location and connection size requirements between the new underground project 4 and the existing operating underground station 1 are determined.
[0064] The connection between the new and old buildings requires opening and modifying the side wall 2 of the operating underground station 1, and at the same time, opening a passageway in the station enclosure structure 17 to form a passage with the modified side wall 2, so as to connect the new underground project 4 with the existing operating underground station 1.
[0065] It involves the renovation of the existing concrete structure wall. Before the renovation of the opening in the side wall 2 of the station, the earthwork of the outside of the new underground project 4 needs to be excavated and the groundwater drained to unload the water and soil horizontal force of the side wall 2 of the station. The side wall 2 of the station only bears the pressure from above, thereby reducing the bending moment M of the wall and the side wall section only has compressive stress.
[0066] S2: Remove the inner concrete 5 within the column area of the station side wall on both sides of the connection opening 15 to be excavated, and remove the inner concrete 6 within the beam area of the station side wall above the connection opening 15 to be excavated, while protecting the original wall reinforcement.
[0067] In step S2, after the concrete is removed, as shown in the attached image. Figure 1 and attached Figure 5 As shown, the concrete within the inner column area and the inner beam area should be removed respectively. During the removal process, care should be taken to protect the original wall reinforcement.
[0068] S3: Within the area of the inner side wall of the station in step S2 that has been demolished, promptly tie the steel bars of the beams and columns at the edge of the opening, construct the inner side column 7 and the inner side beam 8 of the new operating station side wall, and reserve the steel bars;
[0069] As attached Figure 2 and attached Figure 6As shown, the inner column 7 and the inner beam 8 of the side wall of the newly built operating station are respectively built at the location of the inner concrete 5 within the original demolished column area and the location of the inner concrete 6 within the original beam area, and the construction adopts the pouring method.
[0070] In step S3, the steel reinforcement of the beam and column structure in the inner area of the station side wall should be mutually anchored with the existing station side wall 2 structure and the beam and column structure in the outer area of the station side wall to be constructed later, so steel reinforcement needs to be reserved.
[0071] S4: After the inner columns 7 and inner beams 8 of the newly built operating station side wall in step S3 reach the design strength, the concrete 9 outside the column range of the outer area of the station side wall on both sides of the connection opening 15 to be excavated is removed, and the concrete 10 outside the beam range of the outer area of the station side wall above the connection opening 15 to be excavated is removed, and the original wall reinforcement is protected.
[0072] After the concrete is removed, see attached Figure 3 and attached Figure 7 As shown, the concrete within the outer column area and the outer beam area should be removed respectively. During the removal process, care should be taken to protect the original wall reinforcement.
[0073] S5: Within the area outside the station side wall that has been demolished in step S4, the steel bars of the beams and columns at the opening are tied in time to form the outer column 11 and the outer beam 12 of the new operating station side wall. Steel bars are reserved and connected and anchored with the reserved steel bars in step S3, the steel bars protected in step S2, and the steel bars protected in step S4. Finally, the opening column 13 and the opening beam 14 of the new operating station side wall are formed, which enclose the connection opening 15 to be excavated.
[0074] As attached Figure 4 and attached Figure 8 As shown, the outer columns 11 and outer beams 12 of the side walls of the newly built operating station are respectively constructed at the locations of the concrete 9 outside the original demolished column area and the concrete 10 outside the original beam area, and the construction adopts the pouring method.
[0075] Subsequently, the outer columns 11 and outer beams 12 of the newly constructed operating station side wall, and the inner columns 7 and inner beams 8 of the newly constructed operating station side wall, constitute the opening columns 13 and opening beams 14 of the newly constructed operating station side wall, as shown in the attached diagram. Figure 9 and attached Figure 10 As shown.
[0076] In step S5, the reinforcing bars of the stage beams and columns in this stage should be mutually anchored with the existing station side wall 2 structure and the beams and columns of the inner area of the station side wall constructed in the previous step.
[0077] S6: When the newly built operating station side wall opening column 13 and the newly built operating station side wall opening beam 14 in step S5 reach the design strength, the wall of the connection opening 15 to be excavated is broken to form the connection opening 15.
[0078] S7: Connect the newly built operating station side wall opening column 13 and the newly built operating station side wall opening beam 14 to the newly built underground project side wall 16 to achieve spatial connection between the newly built underground project 4 and the operating underground station 1.
[0079] Working principle:
[0080] After unloading the horizontal soil and water pressure on the sidewall of the operating underground station, this invention first demolishes the concrete of the two side walls and the upper wall at the location of the excavation opening 15 in the inner area of the station sidewall 2. Then, new inner columns 7 and new inner beams 8 of the operating station sidewall are formed at the demolished locations. After reaching the design strength, the concrete of the two side walls and the upper wall at the location of the excavation opening 15 in the outer area of the station sidewall 2 is then demolished. New outer columns 11 and new outer beams 12 of the operating station sidewall are formed at the demolished locations. Afterward, the new outer columns 11 and new inner columns 7 of the operating station sidewall form a new... The construction of the station side wall opening column 13, the construction of the outer side beam 12 and the construction of the inner side beam 8 of the station side wall to form the new operating station side wall opening beam 14. After reaching the design strength, the concrete of the wall within the area surrounded by the new operating station side wall opening column 13 and the new operating station side wall opening beam 14 is broken to form the connection opening 15. Then, the new operating station side wall opening column 13 and the new operating station side wall opening beam 14 are structurally connected to the new underground project side wall 16, so that the remaining station side wall 2 after the opening of the connection opening 15 is physically connected to the new underground project side wall 16, and finally achieve the connection purpose of spatial connection between the new underground project 4 and the operating underground station 1.
[0081] Furthermore, in the embodiments, it can be considered that a temporary water-retaining wall and a temporary construction enclosure need to be built before the construction demolition, and the temporary water-retaining wall and the temporary construction enclosure are demolished after the spatial connection between the newly built underground project 4 and the operating underground station 1 is achieved.
[0082] During construction within the operating underground station 1, to prevent groundwater, construction water, debris, dust, noise, etc. from entering the station's operating area, temporary water-retaining walls and temporary construction barriers should be erected in the areas affected by the wall renovation. Physical barriers and protection measures should be implemented for the areas, facilities, and equipment that require protection.
[0083] The enclosure area can meet the needs of the construction site for the opening renovation. Existing station equipment, facilities, pipelines, etc. affected by the opening need to be relocated in conjunction with the new and old structural space design scheme, and moved out of the impact range of the interface construction.
[0084] Furthermore, in the embodiments, it can be considered that in step S3, when constructing the inner column 7 and the inner beam 8 of the side wall of the newly built operating station, except for the side facing the inner side of the space of the underground station 1, the bottom, top and other three sides do not need to use formwork and scaffolding.
[0085] Furthermore, in the embodiments, it can be considered that in step S5, when constructing the outer columns 11 and the outer beams 12 of the side walls of the newly built operating station, except for the side facing the outer side of the underground station 1 space, the bottom, top slab, and other three sides do not need to use formwork and scaffolding.
[0086] Furthermore, in the embodiments, it can be considered to extend a portion of the inner columns 7 and inner beams 8 of the newly built operating station side walls towards the operating underground station 1 to increase the cross-section of the beams and columns. This width range is a temporary component. If it conflicts with the overall design of the underground space, it can be removed after the beams and columns are completed.
[0087] Furthermore, in the embodiments, it can be considered that the internal space of the station is limited and it is impossible to carry out the internal construction in advance. The construction sequence described in this invention can also be to start the construction from the external wall area of the station side wall, that is:
[0088] First, the concrete of the walls on both sides and the wall above the location of the excavation opening 15 on the outer side of the station side wall 2 is demolished. Then, the outer columns 11 and outer beams 12 of the new operating station side wall are formed at the demolished locations. After reaching the design strength, the concrete of the walls on both sides and the wall above the location of the excavation opening 15 on the inner side of the station side wall 2 is demolished. The inner columns 7 and inner beams 8 of the new operating station side wall are formed at the demolished locations. Then, the outer columns 11 and inner columns 7 of the new operating station side wall form the opening column 13 of the new operating station side wall, and the outer beams 12 and inner beams 8 of the new operating station side wall form the opening beam 14 of the new operating station side wall. After reaching the design strength, the concrete of the wall within the area surrounded by the opening column 13 and opening beam 14 of the new operating station side wall is broken to form the connection opening 15.
[0089] In addition, the construction of a new underground project 4 on one side of the operating underground station 1, and the excavation of a connection opening 15 in the station side wall 2 of the operating underground station 1 for the connection and renovation of the old and new projects, will inevitably cause some disturbance to the operating underground station 1. Since the operating underground station 1 has extremely strict requirements regarding deformation, in addition to rigorous surveying, design, and meticulous construction, monitoring and measurement work should be strengthened. During the connection implementation process, automated monitoring methods should be used for the operating underground station 1 project to conduct full-cycle monitoring and measurement of its tracks and station structure. If any situation exceeds the warning value, work should be stopped immediately, the problem analyzed, and targeted measures taken to solve the problem.
[0090] In summary, this invention is applicable to adding entrance and exit passages, transfer passages, or other underground space development facilities to operating stations, especially in complex geological conditions with loose underground soil and abundant groundwater, and for underground engineering projects with large connection depths. To eliminate underground construction risks and avoid or reduce the adverse impact of external operations on existing operating underground stations, the technical solution of this invention is adopted to ensure the safety and reliability of the construction process. This method has high promotional value in all engineering fields where new buildings connect with existing underground structures.
[0091] The above embodiments have provided a detailed description of the present invention, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.
Claims
1. A method for retrofitting a new construction project to a side of a self-supporting underground operating station, characterized in that: The system includes a self-supporting structure on each side, which includes an underground station (1) in operation. The underground station (1) is provided with a station enclosure structure (17) and a station side wall (2) that are connected to each other. The system is characterized in that a connecting opening (15) is formed on the station side wall (2) after excavation, and a passageway is also formed at the corresponding position of the station enclosure structure (17) and the connecting opening (15). The connecting opening (15) is surrounded by a new operating station side wall opening column (13) and a new operating station side wall opening beam (14). The station side wall (2) is connected to the new underground project side wall (16) through the new operating station side wall opening column (13) and the new operating station side wall opening beam (14), forming a new underground project (4) connected to the operating underground station (1). The new underground project (4) is surrounded by a new underground project foundation pit retaining wall (18). The station side wall (2) includes the inner area of the station side wall and the outer area of the station side wall; The newly constructed operating station side wall opening column (13) includes the newly constructed operating station side wall inner column (7) set in the inner area of the station side wall and the newly constructed operating station side wall outer column (11) set in the outer area of the station side wall. The newly constructed operating station side wall opening beam (14) includes the newly constructed operating station side wall inner beam (8) set in the inner area of the station side wall and the newly constructed operating station side wall outer beam (12) set in the outer area of the station side wall. The inner column (7) of the side wall of the newly built operating station is vertically connected to the inner beam (8) of the side wall of the newly built operating station, and the outer column (11) of the side wall of the newly built operating station is vertically connected to the outer beam (12) of the side wall of the newly built operating station. The inner column (7) of the side wall of the newly built operating station is horizontally connected to the outer column (11) of the side wall of the newly built operating station, and the inner beam (8) of the side wall of the newly built operating station is horizontally connected to the outer beam (12) of the side wall of the newly built operating station. The method for modifying a vehicle to bear load on both sides includes the following steps: S1: Determine the external connection location of the underground station (1), form a passage on the station enclosure structure (17), determine the connection opening (15) to be excavated within the station side wall (2), and carry out earthwork excavation and groundwater drainage simultaneously with the new underground project (4). At the same time, construct the new underground project side wall (16) and the new underground project foundation pit enclosure (18) of the new underground project (4). S2: Remove the inner concrete (5) of the column area in the station side wall area on both sides of the connection opening (15) to be excavated, remove the inner concrete (6) of the beam area in the station side wall area above the connection opening (15) to be excavated, and protect the original wall reinforcement. S3: In step S2, within the area of the inner side wall of the station that has been demolished, the steel bars of the beams and columns at the tunnel edge are tied in time to form the inner side column (7) of the new operating station side wall and the inner side beam (8) of the new operating station side wall, and steel bars are reserved. S4: When the inner columns (7) and inner beams (8) of the newly built operating station side wall in step S3 reach the design strength, the concrete (9) outside the column range of the station side wall on both sides of the connection opening (15) to be excavated is removed, and the concrete (10) outside the beam range of the station side wall above the connection opening (15) to be excavated is removed, and the original wall reinforcement is protected. S5: In step S4, within the area outside the station side wall that has been demolished, tie the reinforcement bars of the beams and columns at the opening in time, construct the outer column (11) and the outer beam (12) of the new operating station side wall, and reserve reinforcement bars, connect and anchor them with the reserved reinforcement bars in step S3, the protected reinforcement bars in step S2, and the protected reinforcement bars in step S4, and pour them to finally form the opening column (13) and the opening beam (14) of the new operating station side wall, which will enclose the connection opening (15) to be excavated; S6: When the newly built operating station side wall opening column (13) and the newly built operating station side wall opening beam (14) reach the design strength in step S5, the wall of the connection opening (15) to be excavated is broken to form the connection opening (15). S7: Connect the newly built operating station side wall opening column (13), the newly built operating station side wall opening beam (14) with the newly built underground project side wall (16) to realize the spatial connection between the newly built underground project (4) and the operating underground station (1).
2. The method of claim 1, wherein the method is a split-side self-supporting reconstruction method for connecting a new construction project to an underground operating station, characterized by: Before construction and demolition, temporary water-retaining walls and temporary construction enclosures need to be built, and the temporary water-retaining walls and temporary construction enclosures are demolished after the space connection between the newly built underground project (4) and the operating underground station (1) is achieved.
3. The method of claim 1, wherein the method further comprises: In step S3, when constructing the inner columns (7) of the side wall of the newly built operating station and the inner beams (8) of the side wall of the newly built operating station, except for the side facing the inner side of the space of the underground station (1), the bottom, top and other three sides do not need to use formwork and scaffolding.
4. The method for the side-by-side self-supporting renovation of a newly constructed underground operating station as described in claim 1, characterized in that: In step S5, when constructing the outer columns (11) of the side wall of the newly built operating station and the outer beams (12) of the side wall of the newly built operating station, except for the side facing the outer side of the space of the underground station (1), the bottom, top slab and other three sides do not need to use formwork and scaffolding.