Connecting joint of newly-built channel and existing subway station

Abstract

The utility model provides a connecting node of a newly-built channel and an existing subway station, which belongs to the technical field of building construction and comprises the newly-built channel and the existing subway station, and a newly-built frame beam column is arranged on a connecting interface of the newly-built channel and the existing subway station. The newly-built frame beam column comprises a newly-built structure column, a newly-built frame top plate beam and a newly-built frame bottom plate beam, and the newly-built frame beam column is connected with the existing station through new and old structure connecting steel bars. Existing station side walls between the two newly-built structural columns are chiseled away at intervals to form a plurality of step-by-step chiseled-away parts and temporary remaining parts, the step-by-step chiseled-away parts and the temporary remaining parts are alternately arranged, a temporary steel stand column with a supporting function is vertically arranged in each step-by-step chiseled-away part, and waterproof strengthening measures are further arranged at the connecting position of the newly-built channel and the existing station. Under the condition that the stress requirement of the existing structure holing position is met, the rigidity of the existing station top plate and the side wall end joint at the holing position is enhanced, plugging of a water seepage path at the holing position is enhanced, and the structural durability at the joint position is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and in particular relates to a connection node between a newly built passage and an existing subway station. Background Art

[0002] Subway, also known as underground railway or rail transit, is a mass public transportation system that runs on tracks underground or above ground, providing fast and efficient transportation services for urban residents. The operation of the subway system can reduce the pressure of urban road traffic, alleviate traffic congestion, and improve the efficiency of urban transportation. The subway system usually covers major urban areas and densely populated areas, connecting various important nodes and landmarks in the city, making it convenient for passengers to travel and tour.

[0003] In order to better connect the passenger flow of commercial and subway stations, most of the plots around subway stations will be connected to existing subway stations after development. Patent CN209798841U provides a reserved interface structure for underground structures that are suitable for bevel joints, including an underground structure main body and an inclined channel; two parallel and horizontally arranged frame columns and two parallel and vertically arranged frame beams are arranged between the underground structure main body and the inclined channel; the two frame columns and the two frame beams are arranged on the side of the underground structure main body, located around the temporary blocking wall, forming a rectangular frame structure; the part where the underground structure main body is connected to the two frame columns and the two frame beams is provided with a number of reserved steel bar connectors; each reserved steel bar connector is fixedly connected to the steel bars in the corresponding frame column or the corresponding frame beam; the steel bars of the inclined channel are anchored into the two frame columns and the two frame beams and fixedly connected to the steel bars in the corresponding frame column or the corresponding frame beam.

[0004] When the conditions for channel access are not reserved in the previous subway station, a hole will be opened in the existing subway station when the new channel is connected. When the new channel is connected to the existing station in an inappropriate way, it will affect the internal force distribution of the roof and side walls of the existing subway station. Without taking other additional measures, the reinforcement of the roof and side walls within the influence range of the opening of the existing station is difficult to meet the force requirements. At the same time, waterproofing and structural durability issues also need to be considered at the interface. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a connection node between a newly-built passage and an existing subway station, which increases the durability of the joint and can also improve the waterproof effect.

[0006] The utility model adopts the following technical solutions to solve the above problems:

[0007] A connection node between a newly built passage and an existing subway station, comprising a newly built passage and an existing station, wherein a main enclosure structure is arranged on the outside of the existing station, and newly built frame beams and columns are arranged at the connection interface between the newly built passage and the existing station, wherein the newly built frame beams and columns comprise newly built structural columns, newly built frame top plate beams and newly built frame bottom plate beams, wherein the newly built frame beams and columns are connected to the existing station through new and old structural connecting steel bars, and the side walls of the existing station between two of the newly built structural columns are chiseled out at intervals to form a plurality of alternatingly arranged step-by-step chiseled out portions and temporarily retained portions, wherein a temporary steel column with a supporting function is vertically arranged in each of the step-by-step chiseled out portions, and waterproof reinforcement measures are also provided at the connection between the newly built passage and the existing station.

[0008] Furthermore, the steel bars connecting the new and old structures include the embedded connection between the newly built frame beams and columns and the existing station, the connection between the existing station steel bars anchored into the newly built frame beam and column structure, and the connection between the newly built frame beams and columns and the main enclosure structure system.

[0009] Furthermore, the waterproof reinforcement measures include waterproof reinforcement measures at the connection between the top and bottom plates of the newly built passage and the main enclosure structure of the existing station, as well as multiple water stop strips when connecting the new and old structures.

[0010] Furthermore, the connection surfaces between the newly-built frame top plate beams, the newly-built frame bottom plate beams and the main enclosure structure and the side wall structure of the existing station are roughened, the top plate is painted with top plate waterproof paint, and the bottom plate is provided with bottom plate waterproof membrane.

[0011] Furthermore, the roof waterproof coating has a double-layer structure at the junction of the side walls of the main enclosure structure.

[0012] Furthermore, sealing glue is provided at the junction of the bottom plate waterproofing membrane and the side wall of the main enclosure structure.

[0013] Furthermore, the width of the step-by-step chiseled-out portion is ≤1m, and the temporary retained portion is chiseled out after the temporary steel columns are arranged.

[0014] Furthermore, the temporary steel columns are square steel pipe columns with a width of about 100 mm, and the temporary steel columns are cut off after the newly built frame beams and columns reach a certain strength.

[0015] Furthermore, flat steel plywood is used to seal the joints between the newly built frame bottom plate beam and the existing platform structure.

[0016] Furthermore, a plurality of reserved grouting pipes are reserved at the connection surfaces between the newly-built frame top plate beam and the newly-built frame bottom plate beam and the main enclosure structure and the side wall structure of the existing station.

[0017] The beneficial effects of the utility model are:

[0018] 1. When the new passage is connected to the existing subway station, the existing side wall structure with a width of 1m is cut every 1m or so to form a step-by-step chiseling part and a temporary retention part at the cross interval. Temporary steel columns are set up in the distributed chiseling part to meet the force requirements of the existing structure opening and strengthen the stiffness of the node between the existing station top plate and the side wall end at the opening;

[0019] 2. After the first connection of the embedded reinforcement and the existing side walls on both sides, the temporary retention part of the existing structure side wall is chiseled out, and the temporary steel columns are cut off after the frame system reaches the required strength, so as to minimize the internal force changes of the top plate and side walls within the influence range of the opening of the existing structure;

[0020] 3. The top of the new passage is coated with waterproof paint, two layers of paint waterproof layers are set at the corners of the top plate, waterproof rolls and sealing glue are set at the bottom, and multiple water stop strips are set at the connection between the top plate and the bottom plate and the main enclosure structure of the existing station, which strengthens the blocking of the water seepage path at the opening;

[0021] 4. When the new channel is connected to the existing structure, the concrete at different heights reserved at the top and bottom is manually chiseled out, and the existing station top plate connection steel bars and the existing station side wall connection steel bars are sorted out, and mechanical anchor heads are set at the ends to make full use of the original structural steel bars to increase the structural durability of the joints;

[0022] 5. Set flat steel plywood and reserved grouting pipes at the joints between the new and old structures of the base plate to improve the tightness of the structural connection, thereby enhancing the waterproof effect. At the same time, targeted grouting and sealing can be carried out according to whether there is water seepage at each joint in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0025] Figure 1 It is a plan view of an embodiment of the utility model;

[0026] Figure 2 It is a vertical view of an embodiment of the utility model;

[0027] Figure 3 It is a cross-sectional view of an embodiment of the utility model;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0030] In the figure, 1-new passage; 101-new structural column; 102-new frame top plate beam; 103-new frame bottom plate beam; 2-existing station; 201-existing station hall layer; 202-existing station platform layer; 203-existing station top plate reinforcement; 204-existing station side wall connecting reinforcement; 205-step-by-step removal part; 206-temporary retention part; 3-main enclosure structure; 4-temporary steel column; 5-first connection embedded reinforcement; 6-second connection embedded reinforcement; 7-enclosure structure connecting reinforcement; 8-top plate waterproof coating; 9-water stop strip; 10-third connection embedded reinforcement; 11-bottom plate sealing glue; 12-bottom plate waterproof membrane; 13-flat steel plywood; 14-reserved grouting pipe; 15-extension joint. DETAILED DESCRIPTION

[0031] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "top", "bottom", "longitudinal" and the like indicate positions or state relationships based on the positions or state relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred mechanism or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication or connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1-3 As shown, the existing station 2 includes an existing station hall layer 201 and an existing station platform layer 202 , the newly built passage 1 and the existing station hall layer 201 are located at the same horizontal plane, and a deformation joint 15 is left between the newly built passage 1 and the existing station 2 .

[0034] Embodiment 1:

[0035] like Figure 1-3 As shown, the utility model provides a connection node between a newly-built passage and an existing subway station, including a newly-built passage 1 and an existing station 2, a main enclosure structure 3 is provided on the outside of the existing station 2, existing station top plate steel bars 203 are embedded in the top plate of the existing station hall layer 201, existing station side wall connecting steel bars 204 are embedded in the side walls of the existing station platform layer 202, and enclosure structure connecting steel bars 7 are embedded inside the main enclosure structure 3.

[0036] A new frame beam is provided at the interface between the newly built passage 1 and the existing station 2. The new frame beam includes a new structural column 101, a new frame top plate beam 102 and a new frame bottom plate beam 103. The side wall of the existing station 2 between the two new structural columns 101 is chiseled out to form a plurality of alternatingly arranged step-by-step chiseled parts 205 and temporary retention parts 206. The width of the step-by-step chiseled parts 205 and the temporary retention parts 206 is ≤1m. A temporary steel column 4 with a supporting function is vertically provided in each step-by-step chiseled part 205. The temporary steel column 4 adopts a square steel pipe column with a width of about 100mm. When the temporary steel column 4 is erected, the upper and lower ends are tightened with steel wedges. After the temporary steel column 4 is arranged, the temporary retention part 206 is chiseled out. The temporary steel column 4 is cut off after the new frame beam reaches the strength. Waterproof reinforcement measures are also provided at the connection between the newly built passage 1 and the existing station 2.

[0037] like Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the newly built frame beams and columns are connected to the existing station 2 through the new and old structure connecting steel bars. The new and old structure connecting steel bars include the embedded steel bars connection between the newly built frame beams and columns and the existing station 2, the connection of the existing station 2 steel bars anchored into the newly built frame beam and column structure, and the connection between the newly built frame beams and columns and the main enclosure structure 3 system, specifically including: the newly built structure column 101 is connected to the side wall of the existing station 2 through the first connecting embedded steel bar 5, the newly built frame top plate beam 102 is connected to the existing station top plate steel bar 203 of the existing station 2 through the second connecting embedded steel bar 6, and the newly built frame bottom plate beam 103 is connected to the existing station side wall connecting steel bar 204 of the existing station 2 through the third connecting embedded steel bar 10, and the ends of the existing station top plate steel bar 203 and the existing station side wall connecting steel bar 204 are both provided with mechanical anchor heads, and the enclosure structure connecting steel bars 7 are anchored into the newly built frame top plate beam 203 and the newly built frame bottom plate beam 204 respectively.

[0038] like Figure 3-5As shown, the waterproof reinforcement measures include waterproof reinforcement measures at the connection between the top and bottom plates of the newly built passage 1 and the main enclosure structure 3 of the existing station 2, and multiple waterstop strips 9 when the new and old structures are connected. The waterstop strips 9 are made of water-swelling rubber waterstop strips. The connection surfaces between the newly built frame top plate beams 102, the newly built frame bottom plate beams 103 and the main enclosure structure 3 and the side wall structure of the existing station 2 are roughened, and the top plate waterproof coating 8 is applied. The top plate is double-layered at the junction of the side walls of the main enclosure structure 3. A bottom plate waterproof membrane 12 is arranged at the bottom plate, and a sealing glue 11 is arranged at the junction of the bottom plate waterproof membrane 12 and the side wall of the main enclosure structure 3.

[0039] The working process of the utility model is described below in conjunction with the accompanying drawings:

[0040] The main enclosure structure 3 of the existing station 2 within the scope of the opening is chiseled out, and then the existing side wall structure with a width of 1m is cut every 1m or so to form a step-by-step chiseled out part 205 and a temporary retention part 206 with cross-intervals. When cutting, a height of about 500mm is reserved on the top for manual chiseling of concrete, and the existing station top slab connecting steel bars 203 are sorted out, and a mechanical anchor head is set at the end of the existing station top slab connecting steel bars 203; a height of 800mm is reserved at the bottom for manual chiseling of concrete, and the existing station side wall connecting steel bars 204 are sorted out, and a mechanical anchor head is set at the end of the existing station side wall connecting steel bars 204.

[0041] After the step-by-step chiseling of the side wall 14 is completed, a temporary steel column 4 is erected in the hole. The width of the temporary steel column 4 is about 100 mm, and the length, thickness and number of the temporary steel columns 4 can be adjusted appropriately according to calculations. A steel wedge is used at the bottom of the temporary steel column 4 to tighten the temporary steel column 4 up and down; then, new structural columns 101 are constructed on both sides, and the first connecting reinforcement 5 connecting the new structural columns 101 and the existing side walls is used to connect the new structural columns 101 to the existing side walls on both sides; then, the temporary retention part 206 is chiseled out, and the bottom plate waterproofing membrane 12 and the bottom plate sealing glue 11 are constructed, and the enclosure structure connecting reinforcement 7 is anchored into the new frame top plate beam 102 respectively. And build a new frame bottom plate beam 103, and at the same time, anchor the existing station top plate steel bars 203 and the existing station side wall connecting steel bars 204 into the new frame top plate beam 102 and the new frame bottom plate beam 103 respectively, and carry out the second connection anchor bar 6 and the third connection anchor bar 10 construction, cast the new frame top plate beam 102 and the new frame bottom plate beam 103, and after the frame system reaches the strength, cut off the temporary steel columns 4, and set a plurality of water stop strips 9 respectively. The water stop strips 9 adopt water-expanding rubber water stop strips, and finally construct the channel top plate waterproof coating 8, and set two coating waterproof layers at the corners of the top plate to strengthen the waterproof measures.

[0042] Embodiment 2:

[0043] like Figure 5As shown, the joint between the newly built frame bottom plate beam 103 and the existing platform 2 structure is sealed with a flat steel clamp 13, and other technical features are the same as those in Example 1.

[0044] A flat steel clamping plate 13 is provided at the joint between the new and old structures of the bottom plate to improve the tightness of the structural connection, thereby enhancing the waterproof effect.

[0045] Example 3

[0046] like Figure 4 , Figure 5 As shown, a plurality of reserved grouting pipes 14 are reserved at the connection surfaces between the newly constructed frame top plate beam 102 and the newly constructed frame bottom plate beam 103 and the main enclosure structure 3 and the side wall structure of the existing station 2, and other technical features are the same as those in Example 1.

[0047] By reserving grouting pipes 14 at multiple locations, targeted grouting and plugging can be performed according to whether water seeps into each joint at a later stage.

[0048] The above embodiments are used to describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of application of the present invention shall still fall within the scope of the patent coverage of the present invention.

Claims

1. A connection node between a newly built passage and an existing subway station, comprising a newly built passage (1) and an existing station (2), wherein a main body enclosure structure (3) is provided outside the existing station (2), and characterized in that: A newly built frame beam column is provided at the interface between the newly built passage (1) and the existing station (2), and the newly built frame beam column includes a newly built structural column (101), a newly built frame top plate beam (102) and a newly built frame bottom plate beam (103). The newly built frame beam column and the existing station (2) are connected by connecting steel bars between the new and old structures. The side wall of the existing station (2) between the two newly built structural columns (101) is chiseled out to form a plurality of alternatingly arranged step-by-step chiseled out parts (205) and temporary retention parts (206). A temporary steel column (4) with a supporting function is vertically provided in each of the step-by-step chiseled out parts (205). Waterproof reinforcement measures are also provided at the connection between the newly built passage (1) and the existing station (2).

2. A connection node between a newly built passage and an existing subway station according to claim 1, characterized in that: The steel bars connecting the new and old structures include the embedded steel bars connection between the newly built frame beams and columns and the existing station (2), the connection of the existing station (2) steel bars anchored into the newly built frame beam and column structure, and the connection of the newly built frame beams and columns and the main enclosure structure (3) system.

3. The connection node between a newly built passage and an existing subway station according to claim 1, characterized in that: The waterproof reinforcement measures include waterproof reinforcement measures at the connection between the top and bottom plates of the newly built passage (1) and the main enclosure structure (3) of the existing station (2), as well as multiple water stop strips (9) when connecting the new and old structures.

4. A connection node between a newly built passage and an existing subway station according to claim 3, characterized in that: The connection surfaces between the newly constructed frame top plate beam (102), the newly constructed frame bottom plate beam (103), the main enclosure structure (3) and the side wall structure of the existing station (2) are roughened, a top plate waterproof coating (8) is applied to the top plate, and a bottom plate waterproofing membrane (12) is provided on the bottom plate.

5. The connection node between a newly built passage and an existing subway station according to claim 4, characterized in that: The roof waterproof coating (8) is a double-layer structure at the junction of the side walls of the main enclosure structure (3).

6. The connection node between a newly built passage and an existing subway station according to claim 4, characterized in that: A sealing glue (11) is provided at the junction of the bottom plate waterproofing coiled material (12) and the side wall of the main body enclosure structure (3).

7. The connection node between a newly built passage and an existing subway station according to claim 1, characterized in that: The width of the step-by-step chiseling-out portion (205) is ≤1 m, and the temporary retention portion (206) is chiseled out after the temporary steel column (4) is arranged.

8. The connection node between a newly built passage and an existing subway station according to claim 7, characterized in that: The temporary steel columns (4) are square steel pipe columns with a width of about 100 mm. The temporary steel columns (4) are cut off after the newly built frame beams and columns reach a certain strength.

9. A connection node between a newly built passage and an existing subway station according to any one of claims 1 to 8, characterized in that: The joint between the newly built frame bottom plate beam (103) and the existing station (2) structure is sealed with a flat steel clamping plate (13).

10. A connection node between a newly built passage and an existing subway station according to any one of claims 1 to 8, characterized in that: A plurality of reserved grouting pipes (14) are reserved at the connection surfaces between the newly-built frame top plate beam (102) and the newly-built frame bottom plate beam (103) and the main enclosure structure (3) and the side wall structure of the existing station (2).

Images