CN217028898U - Subway entrance and exit increases strong structure system of opening a hole - Google Patents
Subway entrance and exit increases strong structure system of opening a hole Download PDFInfo
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- CN217028898U CN217028898U CN202220310157.4U CN202220310157U CN217028898U CN 217028898 U CN217028898 U CN 217028898U CN 202220310157 U CN202220310157 U CN 202220310157U CN 217028898 U CN217028898 U CN 217028898U
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Abstract
The utility model discloses a strong open-hole structure system for subway entrances and exits, which comprises a ribbed steel sleeve, a large open-hole combined structure, a grouting module and a freezing module. By adopting the method, the infiltration damage of water can be effectively controlled, the unfavorable deformation of the subway structure generated when the existing subway station is constructed is reduced, and the influence on the operation subway and the urban environment is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering, and particularly relates to a strong open hole structure system for a subway entrance/exit.
Background
With the development of subway construction, more and more 'station-city' integrated projects with subway stations as cores are provided, and in order to realize seamless connection between a comprehensive development area and the stations and improve the convenience of passenger travel and the life experience of surrounding residents, the reserved development conditions are usually considered during subway design; however, due to the influence of factors such as inaccurate urban planning conditions and various predictions, constantly changing commercial planning conditions and development time, the connecting channel is often constructed after the subway is normally operated, and a related communication channel is not reserved on a subway station.
At present, most of similar projects mostly adopt a small opening of an entrance and an exit to communicate a newly-built project with the entrance and the exit of an existing subway or adopt a reserved opening structure for secondary connection, but the defect is that the size of the opening is too small to achieve the large space effect of the communication opening, and disturbance deformation of the entrance and the exit of the existing subway is easily caused in the construction process.
Disclosure of Invention
The utility model discloses a powerful hole-opening structure system for subway entrances and exits, which is used for quickly and less-disturbingly carrying out large hole-opening transformation on the existing subway and realizing comprehensive development of the periphery.
The technical scheme adopted by the utility model is as follows:
a subway entrance and exit enhanced open hole structure system is characterized in that:
the device comprises a ribbed steel sleeve, a large-opening combined structure, a grouting module and a freezing module.
The multi-ribbed steel sleeve comprises a built-in steel ring, transverse supporting ribs and vertical supporting ribs.
The large-opening combined structure comprises a combined beam structure, a combined column structure and a combined bottom beam structure, wherein the combined beam structure is composed of top beam supporting section steel and reinforced concrete, the combined column structure is composed of column supporting section steel and reinforced concrete, and the combined bottom beam structure is composed of bottom beam supporting section steel and reinforced concrete.
The grouting module consists of a hoisting hole and a grouting hole, the hoisting hole is welded and fixed in each splicing module of the ribbed steel sleeve and has the functions of hoisting the steel sleeve and grouting the steel ring wall, and the combined beam top is provided with an embedded grouting pipe for secondary supplementary grouting.
The freezing module comprises freezing pipes which are arranged at a certain distance from the side wall of the opening of the entrance and the exit, and the horizontal distance and the longitudinal length of the freezing pipes are determined according to calculation.
The utility model has the following advantages:
the utility model supports through the ribbed steel sleeve in the structure system and the construction method for realizing the reinforced large-opening structure at the subway entrance and exit, can effectively stabilize the entrance and exit structure, can strictly limit the deformation of the entrance and exit within a controllable range compared with the traditional excavation scheme, has stronger safety, can adjust the ribbed spacing according to the span, further adapts to the size of the entrance and exit, can adopt steel plates with different thicknesses and interface shapes for combined welding through calculation, and has certain flexibility.
The utility model is provided with a ribbed steel sleeve, combined section steel, grouting materials, support ribs, a temporary jack and the like, the machines used for grouting the steel and the cement mortar, the template for erecting the sleeve, steel bar welding equipment, a sleeve fixing anchor bolt and the like are all conventional materials or equipment, the corresponding sizes of the conventional materials or equipment are conventional types in engineering, the conventional materials or equipment are convenient to process, manufacture and purchase, the dynamic adjustment and processing can be carried out according to the monitoring stability of deformation and the geological conditions on site, the dynamic optimization and adjustment can be carried out according to the construction effect, and the utility model has strong operability.
The structure system of the utility model adopts a freezing method to freeze rock and soil mass around the open hole so as to improve the impermeability and the deformation resistance of the rock and soil mass, form a freezing layer, adopts a ribbed steel sleeve to permanently reinforce the existing entrance and exit, improves the deformation resistance of the existing subway entrance and exit, adopts a micro-disturbance dynamic and static force cutting method to quickly process the side wall of the existing subway station entrance and exit, constructs a large open hole combined structure, utilizes a grouting module to seal the structure system, and finally forms a complete communication system. By adopting the method, the seepage damage of water can be effectively controlled, the unfavorable deformation to the subway structure generated when the existing subway station is constructed is reduced, and the influence on the operation subway and the urban environment is greatly reduced. By adopting the method, the seepage damage of water can be effectively controlled, the unfavorable deformation of the subway structure generated when the existing subway station is constructed is reduced, and the influence on the operation subway and the urban environment is greatly reduced. Therefore, the utility model has higher economic benefit and social benefit and wide application prospect in the urban rail transit industry.
Drawings
FIG. 1 is a layout diagram of an enhanced large-hole architecture;
FIG. 2 is a cross-sectional view of an enhanced large open hole composite structure;
FIG. 3 is a side view of a steel sleeve;
FIG. 4 is a large drawing of a hoisting hole;
FIG. 5 shows a first step of construction for opening holes in the side walls of the entrance and exit;
FIG. 6 shows a second step of opening the side walls of the entrance and exit;
FIG. 7 shows a third step of opening holes in the side walls of the doorway;
FIG. 8 shows a fourth step of opening the side wall of the doorway;
fig. 9 shows a fifth construction step for opening the side wall of the doorway.
The labels in the figure are: 1-built-in steel ring, 2-transverse supporting rib, 3-vertical supporting rib, 4-hoisting hole, 5-grouting sleeve, 6-supporting section steel, 7-reinforcing steel bar, 8-jack, 9-double-spliced H-shaped steel, 10-freezing pipe, 11-inlet and outlet, 12-connecting plate, 13-hoisting hole steel and 14-connecting channel.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The utility model relates to a strong opening structure system for subway entrances and exits, which is used for the situation that newly increased communication needs to be carried out on the reconstruction of the existing subway entrances and exits in later development when the operation subway station is not reserved for long-term development and connection.
The enhanced large open-hole structure system comprises a ribbed steel sleeve, a large open-hole combined structure, a grouting module and a freezing module.
The ribbed steel sleeve comprises a built-in steel ring, transverse support ribs, vertical support ribs and hoisting holes, the deformation resistance of the existing subway entrance/exit is improved through the integral rigidity of the ribbed steel sleeve, the deformation resistance of the entrance/exit is further improved through the transverse support ribs and the vertical support ribs of the steel grating, the support ribs are connected through groove side welding seams, the hoisting holes are arranged among the support ribs, and the hoisting holes are also used as grouting holes between a later stage and a structural slab.
The large-opening combined structure comprises a combined beam and column structure, the combined structure beam and column structure is composed of supporting section steel and reinforced concrete, a top beam structure is firstly excavated in a static cutting and segmentation manner, the supporting section steel is placed, a backing plate is adopted between the section steel and the top beam for jacking, a reinforced pouring top beam is firstly arranged after excavation to form a combined top beam structure, and the combined column structure and a bottom beam combined structure are combined to form the top beam structure; the temporary supporting system with the additional jacks is adopted for vertical supporting inside the existing subway, and the stability of the points of the existing subway after the side wall is cut is guaranteed.
The freezing module adopts freezing pipes to vertically freeze, a reliable freezing layer is formed on a soil layer near the opening side of the subway entrance and exit, a waterproof curtain is formed, a soft stratum is reinforced, the excavation surface of a rock-soil body of an excavation channel in the later period is stabilized, and cracking caused by water inrush from a substrate and uneven stress on the side edge of the existing subway is prevented.
And excavating the soil under the protection of the large opening combined structure and the freezing module, forming a communicable channel with the newly-built structure, and realizing the connection with the development of the peripheral property.
A method for constructing a strong open-hole structure system of a subway entrance and exit includes freezing rock and soil around the open-hole by a freezing method to improve anti-permeability and anti-deformation capabilities of the rock and soil to form a frozen layer, permanently reinforcing the existing entrance and exit by ribbed steel sleeves to improve the anti-deformation capability of the existing subway entrance and exit, rapidly processing the side wall of the existing subway station entrance and exit by a micro-disturbance dynamic-static cutting method to construct a large open-hole combined structure, and sealing the structure system by a grouting module to finally form a complete connected system. By adopting the method, the seepage damage of water can be effectively controlled, the unfavorable deformation to the subway structure generated when the existing subway station is constructed is reduced, and the influence on the operation subway and the urban environment is greatly reduced.
The method comprises the following steps:
the method comprises the following steps: firstly, constructing a built-in steel ring 1 in a channel, arranging transverse support ribs 2 and vertical support ribs 3 on the side wall of the built-in steel ring 1 through butt welding, welding the transverse support ribs 2 and the vertical support ribs 3 by adopting steel plates, connecting the two groups of ribs by adopting a connecting plate 12, reserving hoisting holes 4 with the thickness not less than 20mm, manufacturing the hoisting holes by adopting Q235B steel with the thickness of 20mm, welding the hoisting holes through the thickness of the built-in steel ring, and making secondary grouting holes between a structure and the steel ring; reserving an inlet later-stage hole-opening structure at a position needing to be opened with a hole, reserving a grouting sleeve on a steel sleeve body at the position needing to be opened with the hole, and additionally arranging a temporary support of a vertical jack 8 on the steel sleeve to ensure that a point is stable after the existing subway is cut on the side wall; the materials comprise a built-in steel ring 1, transverse supporting ribs 2 and vertical supporting ribs 3, and are subjected to zinc plating and corrosion prevention treatment before assembly;
step two: the vertical freezing pipes 10 are arranged according to calculation, active freezing is needed during excavation, and the freezing pipes and the side walls of the access opening keep at least 2m of safe distance.
Step three: stripping and excavating a top wall body of a large open-pit structure by adopting a micro-disturbance dynamic and static cutting method, embedding support section steel 6, adopting H32I-shaped steel for supporting, horizontally jacking a H32 flange and the top of the open pit, arranging an embedded grouting pipe 5 every 500mm, and performing grouting treatment after jacking;
step four: calculating and arranging top beam stress and structural steel bars 7 according to design, and forming a combined structure by formwork pouring and section steel support;
step five: excavating a hole column structure, embedding column support section steel 6, calculating column stress and structural steel bars 7 according to design, and forming a combined structure by formwork pouring and section steel;
step six: the middle part of the passageway is broken to leave the unearthed soil body 9, the space of a large opening is realized, the monitoring is strengthened in the breaking process, the prestress of a jack 8 is adjusted, and the sizes and the intervals of a transverse support rib plate 8 and a vertical support rib 9 of a steel sleeve can be encrypted and adjusted when necessary;
step seven: pre-burying profile steel and stress and structural steel bars 7 at the bottom beam, and forming a combined structure by formwork pouring and the profile steel;
step eight: and (4) dismantling the temporary jack support 8, secondarily coating anticorrosive paint on the inner surface of the steel sleeve, recovering an entrance decoration space, and realizing large hole opening.
The key of the successful implementation of the utility model is that a ribbed steel sleeve is quickly erected, the deformation of the opening position of the entrance and the exit is strictly controlled in the whole structure construction process, the steel sleeve is adopted to strengthen the support in the implementation engineering, the method of utilizing the steel sleeve to support ribs and the adjustable and combinable combined structure of the section steel is utilized to stabilize and reinforce the opening hole body, the freezing method is utilized to reinforce the soil body at the opening position of the entrance and the exit, the seepage deformation of the rib soil body is controlled, and the lateral strength of the soil body is improved, thereby ensuring the safety of the support system, certainly, the geological conditions are varied, and the whole design process still needs to follow: the principle of strong support, duty measurement, short excavation and quick sealing.
The multi-section steel grouting machine is provided with a ribbed steel sleeve, combined section steel, grouting materials, supporting ribs, a temporary jack and the like, the machines used for steel and cement mortar grouting, a template for erecting the sleeve, steel bar welding equipment, a sleeve fixing anchor bolt and the like are all conventional materials or equipment, the corresponding sizes of the multi-section steel grouting machine are conventional types in engineering, the multi-section steel grouting machine is convenient to process, manufacture and purchase, the processing can be dynamically adjusted according to the monitoring stability of deformation and on-site geological conditions, the dynamic optimization adjustment is carried out according to the construction effect, and the multi-section steel grouting machine has strong operability. The utility model has higher economic benefit and social benefit and wide application prospect in the urban rail transit industry.
The utility model is not limited to the examples, and any equivalent changes to the technical solution of the utility model by a person skilled in the art after reading the description of the utility model are covered by the claims of the utility model.
Claims (4)
1. A subway entrance/exit enhanced open hole structure system is characterized in that:
the device comprises a ribbed steel sleeve, a large opening combined structure, a grouting module and a freezing module;
the multi-ribbed steel sleeve comprises a built-in steel ring (1), transverse support ribs (2) and vertical support ribs (3);
the large-opening combined structure comprises a combined beam structure, a combined column structure and a combined bottom beam structure, wherein the combined beam structure consists of top beam support section steel (6) and reinforced concrete, the combined column structure consists of column support section steel (6) and reinforced concrete, and the combined bottom beam structure consists of bottom beam support section steel (6) and reinforced concrete;
the grouting module consists of a hoisting hole (4) and a grouting hole, the hoisting hole (4) is welded and fixed in the ribbed steel sleeve and is used for hoisting the steel sleeve and grouting the steel ring wall, and the top of the composite beam structure is provided with an embedded grouting pipe (5);
the freezing module comprises a freezing pipe (10), and the freezing pipe (10) is arranged on the side wall of the opening of the inlet and outlet.
2. The subway entrance/exit enhanced open hole structure system as claimed in claim 1, wherein:
the transverse support ribs (2) and the vertical support ribs (3) are connected by connecting plates (12).
3. The subway entrance/exit enhanced open hole structure system as claimed in claim 2, wherein:
the thickness of the connecting plate (12) is not less than 20mm, and a hoisting hole (4) is reserved.
4. The subway entrance/exit enhanced open hole structure system as claimed in claim 3, wherein:
the freezing pipe (10) is kept at a safety distance of at least 2m from the side wall of the entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220310157.4U CN217028898U (en) | 2022-02-16 | 2022-02-16 | Subway entrance and exit increases strong structure system of opening a hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220310157.4U CN217028898U (en) | 2022-02-16 | 2022-02-16 | Subway entrance and exit increases strong structure system of opening a hole |
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| CN217028898U true CN217028898U (en) | 2022-07-22 |
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| CN202220310157.4U Active CN217028898U (en) | 2022-02-16 | 2022-02-16 | Subway entrance and exit increases strong structure system of opening a hole |
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- 2022-02-16 CN CN202220310157.4U patent/CN217028898U/en active Active
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