CN111074941A - Large-span composite structural underground station and construction method thereof - Google Patents

Large-span composite structural underground station and construction method thereof Download PDF

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Publication number
CN111074941A
CN111074941A CN201911412368.8A CN201911412368A CN111074941A CN 111074941 A CN111074941 A CN 111074941A CN 201911412368 A CN201911412368 A CN 201911412368A CN 111074941 A CN111074941 A CN 111074941A
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China
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cable
top plate
roof
connecting rod
station
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CN201911412368.8A
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李勇
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CRRC Construction Engineering Co Ltd
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CRRC Construction Engineering Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/04Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

The invention relates to the technical field of rail transit or underground stations, in particular to a large-span composite structure type underground station.A row of fixed points extending along the traveling direction of the station are uniformly distributed in two side areas of the middle part of a top plate; the fixed point of side and the one end fixed connection of second cable on the roof, the other end and the section fixed connection that extends of second cable, first cable reduce roof central authorities lower surface pulling force and amount of deflection, and the second cable reduces near roof tip upper surface tensile stress, and the safe construction of processes such as the excavation below the guarantee roof, pouring bottom plate for construction speed does not hinder the pedestrian and passes, saves the time and the cost of constructing middle structure post.

Description

Large-span composite structural underground station and construction method thereof
Technical Field
The invention relates to the technical field of rail transit or underground stations, in particular to a large-span composite structural underground station and a construction method thereof.
Background
Present underground station generally adopts undercut arch tunnel or open cut rectangular frame structure, to the construction mode of open cut rectangular structure, has the station span less, and the station intermediate structure post is more, influences the operation construction on the one hand, has the problem that the intermediate structure post was damaged in the construction striking, and on the other hand also can influence the use at station after the construction was accomplished, and especially the intermediate structure post can influence the pedestrian, influences the station to arranging of pedestrian passageway, probably causes the condition that the pedestrian need detour.
In addition, the construction thereof is very troublesome. Specifically, when the construction is carried out by adopting a sequential method, on one hand, supports need to be arranged when a foundation pit is excavated, the supports are difficult to arrange, the working procedures are more, the consumed time is long, and the instability of the supports is a major safety risk in construction; on the other hand, the construction of more structural columns has the problem of complicated construction procedures and the like. When the reverse construction method is adopted for construction, the structural columns need to be constructed from the ground, the construction process is complex, and the construction quality is difficult to effectively control.
Disclosure of Invention
The invention aims to solve the problems that construction is troublesome and construction quality is difficult to guarantee due to the fact that an intermediate structural column is needed for constructing an underground station in a rectangular frame structure form at present, and pedestrian traffic is formed after the station is constructed, and provides a large-span composite structural type underground station and a construction method thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
a large-span composite structural underground station comprises a top layer, side walls and a bottom plate, wherein the top layer, the top plate and the two side walls are arranged in a shape like a Chinese character kou, the top layer comprises the top plate, inhaul cables and connecting rods, two rows of cable holes are respectively arranged on two sides of the middle part of the top plate at intervals along the driving direction, each cable hole in each row of cable holes corresponds to the other row of cable holes one by one, the inhaul cables penetrate through one cable hole from the top to the bottom of the top plate and then are arranged below the top plate, the inhaul cables penetrate through the cable holes corresponding to the cable holes from the bottom to the top of the top plate, the top of each side wall extends out of the top plate to form extension sections, two ends of each inhaul cable are respectively and fixedly arranged on the extension sections of the two side walls, every two cable holes correspond to one inhaul cable, and therefore a plurality of the inhaul cables, the roof structure is characterized in that a connecting rod is arranged between the lower side face of the roof and a pull cable below the roof, one end of the connecting rod is fixed on the lower side face of the roof, and the other end of the connecting rod is fixedly connected with the pull cable.
Preferably, two rows of cable holes are arranged at intervals along the traveling direction on two sides of the middle of the top plate, the cable holes penetrate through the top plate, the cable holes are arranged in an inclined mode, each cable hole in one row of cable holes corresponds to one cable hole in the other row, one steel cable penetrates through one cable hole from top to bottom from the top of the top plate and then is arranged below the top plate, the steel cable penetrates through the cable hole corresponding to the cable hole from bottom to top and then is arranged above the top plate, the top of each side wall extends out of the top plate to form an extension section, two ends of each steel cable are fixedly arranged on the extension sections of the two side walls respectively, and fillers are arranged in the cable holes to enable the steel cable to be fixedly connected with the top plate, so that the steel cable below the top plate forms the first cable, and the steel cable above the two sections of the top plate forms the two.
Preferably, a connecting rod is also provided between the upper side surface of the top plate and the pull cable on the top surface of the top plate.
Preferably, the connecting rod is in a V shape, two free ends of the connecting rod are fixedly arranged on the top plate, and a sharp-angled end of the connecting rod is fixedly arranged on the inhaul cable.
Preferably, a connecting rod is arranged between the middle part of the top plate and the middle part of the pull rope, and a connecting rod is arranged between the 1/4 part of the top plate and the pull rope.
Preferably, a straight thread sleeve is arranged at the joint of the side wall and the top plate, and is used for connecting the top plate with the side wall through a steel bar.
Preferably, the distance between the cable hole and the nearest side wall is 0.2L-0.3L, and L is the span of a station.
Preferably, the connecting rod is provided to be capable of extending and contracting.
The application discloses a construction method of a large-span composite structural underground station, wherein the large-span composite structural underground station is the large-span composite structural underground station and comprises the following steps:
s1, excavating a groove for placing the side wall, and constructing by adopting a cast-in-place or prefabricated assembly method to form the side wall;
s2, excavating a soil layer on the top of the station to the height of the top plate, and excavating holes for placing the supporting rods;
s3, compacting a soil layer, paving a template of a top plate, binding steel bars, arranging connecting rods on the steel bars, and exposing the parts of the connecting rods, which are used for connecting inhaul cables;
s4, pouring top plate concrete, maintaining, after the concrete meets the requirement to form the top plate, excavating soil below the top plate until the height is 1.5-2.5 meters away from the lower side surface of the top plate, penetrating the stay cable through the cable hole of the top plate, matching with the connecting rod at the bottom of the top plate and penetrating through the other cable hole, respectively arranging two ends of the stay cable on the extending sections of the two side walls, and anchoring after tensioning;
and S5, continuously excavating the soil body below the top plate until the height of the bottom plate, and forming the bottom plate after constructing a cushion layer, laying a brick film, binding reinforcing steel bars and pouring concrete.
The application also discloses a construction method of the large-span composite structural underground station, the large-span composite structural underground station is a large-span composite structural underground station with the telescopic connecting rod, the construction steps are the same, and in the step S4, the size of the connecting rod is adjusted to enable the distance between the inhaul cable and the top plate to reach the preset requirement; and other buildings required for forming the station are constructed after step S5.
Compared with the prior art, the invention has the beneficial effects that: establish multichannel connecting rod support, the multichannel cable in the bottom of the structure roof of conventional underground station to constitute the novel atress structure of roof + multichannel support + multichannel cable, first cable can reduce roof central authorities lower surface pulling force and amount of deflection, the second cable can reduce near roof tip upper surface tensile stress, roof + multichannel support + multichannel cable atress structure that first cable and second cable cooperation formed, can ensure the following excavation of roof, pour the safe construction of processes such as bottom plate. Because of the large span, the span of the field is larger than 25 meters generally, and the span is larger, the construction of multiple working faces can be realized, and the construction speed is accelerated. In addition, because no middle structural column is arranged under the top plate after the building, the pedestrian passing is not hindered, and the middle structural column is not required to be arranged, so that the time and the cost for constructing the middle structural column are saved.
Description of the drawings:
FIG. 1 is a schematic structural view of a large-span composite structural underground station of the present application;
FIG. 2 is an enlarged view of a portion C of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a large-span composite structure underground station of the present application;
FIG. 4 is a partial enlarged view of A in FIG. 3;
FIG. 5 is a schematic structural view of a connecting rod of the present application;
the labels in the figure are: 1. a top plate; 3. a side wall; 31. an extension end of the side wall; 32. the side wall is connected with the top plate; 33. the side wall is connected with the bottom plate; 34. a foundation of the side wall; 4. a base plate; 5. a cable; 6. a connecting rod under the top plate; 7. an anchor cable anchoring end; 8. a cable hole; 9. the connecting rod is positioned on the top plate, 61 is the free end of the connecting rod, 62 is the sharp-angled end of the connecting rod, 63 is the screw, 64 is the grommet, 65 is the through hole, 81 is the filler.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
As shown in fig. 1-4, a large-span composite structure underground station comprises a top layer, side walls and a bottom plate, wherein the top layer, the top plate and the two side walls are arranged in a shape of a Chinese character 'kou',
the top layer comprises a top plate, first inhaul cables, second inhaul cables and connecting rods, wherein two rows of fixed points extending along the station travelling direction are uniformly distributed in two side areas of the middle part of the top plate, each fixed point in one row of fixed points is in one-to-one correspondence with the other row of fixed points, the fixed points are uniformly distributed on the upper side surface and the lower side surface of the top plate, one fixed point of the lower side surface of the top plate is fixed with one end of each first inhaul cable, the other end of each first inhaul cable is fixed with the fixed point corresponding to the fixed point, each two fixed points of the lower side surface of the top plate correspond to one first inhaul cable, so that a plurality of the inhaul cables are distributed in the station travelling direction, the connecting rods are arranged between the lower side surface of the top plate and the first; the top of the side wall extends out of the top plate to form an extension section, a fixed point on the upper side face of the top plate is fixedly connected with one end of the second inhaul cable, and the other end of the second inhaul cable is fixedly connected with the extension section.
Through the above scheme, establish multichannel connecting rod support in the bottom of the structure roof of conventional underground station, the multichannel cable, thereby constitute roof + multichannel and support + the novel atress structure of multichannel cable, first cable can reduce roof central authorities lower surface pulling force and amount of deflection, the second cable can reduce near roof tip upper surface tensile stress, roof + multichannel support + multichannel cable atress structure that first cable and second cable cooperation formed, can ensure the following excavation of roof, pour the safe construction of processes such as bottom plate. Because of the large span, the span of the field is larger than 25 meters generally, and the span is larger, the construction of multiple working faces can be realized, and the construction speed is accelerated. In addition, because no middle structural column is arranged under the top plate after the building, the pedestrian passing is not hindered, and the middle structural column is not required to be arranged, so that the time and the cost for constructing the middle structural column are saved.
A row of cable holes are arranged at intervals on two sides of the middle part of the top plate along the driving direction, the cable holes penetrate through the top plate, the cable holes are obliquely arranged, each cable hole in one row of cable holes corresponds to the cable hole in the other row one by one, one steel cable passes through one cable hole from the top to the bottom and then is arranged below the top plate, the steel cable passes through the cable hole corresponding to the cable hole from the bottom to the top and then is arranged above the top plate, the top parts of the side walls extend out of the top plate to form extension sections, two ends of the steel cable are respectively and fixedly arranged on the extension sections of the two side walls, fillers are arranged in the cable holes to enable the steel cable to be fixedly connected with the top plate, therefore, the steel cable positioned below the top plate forms the first inhaul cable, the two sections of steel cables positioned above the top plate form the two second inhaul cables, and the cable holes form fixing points, so that the integral stress is better.
In addition, the connecting rod of this application is the V-arrangement, and two free ends of connecting rod are fixed to be set up on the roof, and the pointed angle end and the cable cooperation of connecting rod, it is specific, and the pointed angle end of connecting rod is provided with the through-hole that allows the cable to pass through, as long as the cable tensioning back connecting rod can play the supporting role can. Preferably, the connecting rod can be the branch shape, also can it be other shapes, as long as can support the cable can, more select, the connecting rod sets up with the mode that can stretch out and draw back, the scheme of the member that can stretch out and draw back is more, as long as can stretch out and draw back can, this application is no longer repeated to the flexible mode of connecting rod, set up the connecting rod to the tensioning degree that can adjust the cable as the mode that can stretch out and draw back, most important, can change the atress of whole top layer, especially the atress of roof, adaptability is better. Referring to fig. 5, the connecting rod adopts the V-shape, especially two free ends of the connecting rod cooperate to form an isosceles trapezoid structure, or the whole connecting rod is set in the form of an equilateral triangle, so the stress is better, for the telescopic mode, a grommet is arranged at the tip end of the connecting pipe, the grommet cooperates with the tip end of the connecting rod in the form of a hexahedron to allow the grommet to be telescopic relative to the connecting rod and not to rotate, and simultaneously the connecting rod and the grommet are connected through a screw, and the screw cooperates with the grommet and the connecting rod in a threaded manner, so the height of the grommet can be adjusted by screwing the screw.
In order to better bear the gravity, in the span direction of the station, namely the left and right direction in fig. 1, and the up and down direction in fig. 3, the connecting rod is arranged between the middle part of the top plate and the middle part of the guy cable, and the connecting rod is arranged between the 1/4 part of the top plate and the guy cable.
Preferably, the distance between the cable hole and the nearest side wall is 0.2L-0.3L, L is the span of a station, the cable hole is preferably arranged at the position 0.25L away from the nearest side wall, a reverse bending point exists after the top plate is pressed, the reverse bending point is generally at the position 0.25L, and the reverse bending point slightly moves according to slight changes of materials or stress. The whole top layer can be better stressed by arranging the top layer at the position. The connecting part of the side wall and the top plate is provided with a straight thread sleeve, and the top plate is connected with the side wall through a steel bar.
The construction method of the large-span composite structural underground station comprises the following steps:
s1, excavating a groove for placing the side wall, and constructing to form the side wall by adopting a cast-in-place or prefabricated assembly method;
s2, excavating a soil layer on the top of the station to the height of the top plate, and excavating holes for placing supporting rods;
s3, compacting a soil layer, paving a template of a top plate, binding steel bars, arranging connecting rods on the steel bars, exposing the positions of the connecting rods for connecting inhaul cables, and specifically binding the top of a plate bottom support on the steel bars and exposing the bottom of the top plate at the bottom; the upper plate is supported and bound on the steel bars, and the top of the upper plate is exposed out of the top surface of the top plate; cable holes for passing through cables are arranged at the reverse bending points of the plates;
s4, pouring top plate concrete, maintaining, after the concrete meets the requirement to form a top plate, excavating soil below the top plate until the height of the soil is 1.5-2.5 meters away from the lower side surface of the top plate, adjusting the size of a connecting rod to enable the distance between a guy cable and the top plate to meet the preset requirement after the guy cable is arranged, enabling the guy cable to penetrate through a cable hole of the top plate, match the connecting rod at the bottom of the top plate and penetrate through another cable hole, respectively arranging two ends of the guy cable on extension sections of two side walls, and anchoring after tensioning;
s5, continuously excavating the soil body below the top plate until the height of the bottom plate, constructing a cushion layer, paving a brick film, binding reinforcing steel bars and pouring concrete to form the bottom plate, and adjusting the size of the connecting rod to enable the distance between the inhaul cable and the top plate to reach the preset requirement.

Claims (10)

1. The utility model provides a large-span compound structural formula underground station, includes top layer, side wall and bottom plate, top layer, roof and two the side wall is "mouth" font and arranges, its characterized in that, the top layer includes roof, first cable, second cable and connecting rod, the regional one row of fixed point that extends along the station traffic direction that has arranged in both sides at the middle part of roof, every fixed point in one row of fixed point and the fixed point one-to-one of another row of fixed point, the fixed point has been arranged to the last side and the downside of roof, a fixed point of the downside of roof is fixed with the one end of first cable, the other end of first cable is fixed with the fixed point that this fixed point corresponds, every two the fixed point of roof downside corresponds with one the first cable to a plurality of cables have been arranged in the station traffic direction, the downside of roof with set up the connecting rod between the first cable, one end of the connecting rod is fixed on the lower side surface of the top plate, and the other end of the connecting rod is fixed with the inhaul cable; the top of the side wall extends out of the top plate to form an extension section, a fixed point on the upper side face of the top plate is fixedly connected with one end of the second inhaul cable, and the other end of the second inhaul cable is fixedly connected with the extension section.
2. The large-span composite structural formula underground station of claim 1, a row of cable holes are arranged at intervals on two sides of the middle part of the top plate along the driving direction, the cable holes penetrate through the top plate, the cable holes are obliquely arranged, each cable hole in one row of cable holes corresponds to the cable hole in the other row one by one, one steel cable passes through one cable hole from the top to the bottom and then is arranged below the top plate, the steel cable passes through the cable hole corresponding to the cable hole from the bottom to the top and then is arranged above the top plate, the top parts of the side walls extend out of the top plate to form extension sections, two ends of the steel cable are respectively and fixedly arranged on the extension sections of the two side walls, fillers are arranged in the cable holes to enable the steel cable to be fixedly connected with the top plate, thus, the steel cable below the top plate forms the first pull cable, and the two steel cables above the top plate form the two second pull cables.
3. The large-span composite structural formula underground station according to claim 1 or 2, characterized in that a connecting rod is also provided between the upper side of the roof and a guy cable on the roof.
4. The large-span composite structural underground station as claimed in claim 1 or 2, wherein the connecting rod is V-shaped, two free ends of the connecting rod are fixedly disposed on the top plate, and a sharp end of the connecting rod is fixedly disposed on the pulling cable.
5. The large-span composite structural underground station as claimed in claim 1 or 2, wherein a connecting rod is disposed between the middle of the roof and the middle of the guy cable, and a connecting rod is disposed between the 1/4 portion of the roof and the guy cable.
6. The large-span composite structural underground station as claimed in claim 1 or 2, wherein a straight threaded sleeve is provided at a joint of the side wall and the top plate, for connecting the top plate with the side wall through a steel bar.
7. The large-span composite structural underground station as claimed in claim 1 or 2, wherein the distance between the cable hole and the nearest side wall is between 0.2L and 0.3L, where L is the span of the station.
8. The large-span composite structural formula underground station according to claim 1 or 2, wherein the connection rod is provided in a retractable manner.
9. A construction method of a large-span composite structural underground station, which is characterized in that the large-span composite structural underground station is the large-span composite structural underground station as claimed in any one of claims 2 to 7, and comprises the following steps:
s1, excavating a groove for placing the side wall, and constructing by adopting a cast-in-place or prefabricated assembly method to form the side wall;
s2, excavating a soil layer on the top of the station to the height of the top plate, and excavating holes for placing the supporting rods;
s3, compacting a soil layer, paving a template of a top plate, binding steel bars, arranging connecting rods on the steel bars, and exposing the parts of the connecting rods, which are used for connecting inhaul cables;
s4, pouring top plate concrete, maintaining, after the concrete meets the requirement to form the top plate, excavating soil below the top plate until the height is 1.5-2.5 meters away from the lower side surface of the top plate, penetrating the stay cable through the cable hole of the top plate, matching with the connecting rod at the bottom of the top plate and penetrating through the other cable hole, respectively arranging two ends of the stay cable on the extending sections of the two side walls, and anchoring after tensioning;
and S5, continuously excavating the soil body below the top plate until the height of the bottom plate, and forming the bottom plate after constructing a cushion layer, laying a brick film, binding reinforcing steel bars and pouring concrete.
10. A construction method of a large-span composite structure type underground station is characterized in that the large-span composite structure type underground station is the large-span composite structure type underground station disclosed by claim 8, the construction steps are the same as the construction steps disclosed by claim 8, and in the step S4, the size of a connecting rod is adjusted to enable the distance between a pull rope and a top plate to reach the preset requirement; and other buildings required for forming the station are constructed after step S5.
CN201911412368.8A 2019-12-31 2019-12-31 Large-span composite structural underground station and construction method thereof Pending CN111074941A (en)

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Application Number Priority Date Filing Date Title
CN201911412368.8A CN111074941A (en) 2019-12-31 2019-12-31 Large-span composite structural underground station and construction method thereof

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106869172A (en) * 2017-04-01 2017-06-20 中交第二航务工程局有限公司 In-situ deposited prefabricated split-mounting type subway underground station construction method
CN106907159A (en) * 2017-03-27 2017-06-30 中铁隧道勘测设计院有限公司 A kind of Shallow Covered Metro Station separates open type structure and its construction method
CN108560562A (en) * 2018-05-24 2018-09-21 东南大学 A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill
CN108914966A (en) * 2018-08-15 2018-11-30 北京市政建设集团有限责任公司 A kind of open-cut station main structure and its construction method
CN208844444U (en) * 2018-08-02 2019-05-10 中国建筑股份有限公司 A kind of box beam ruggedized construction based on rope
CN110080295A (en) * 2019-04-23 2019-08-02 中铁第四勘察设计院集团有限公司 A kind of lid of assembled vault greatly across no column underground structure digs full-reverse construction method
CN110512647A (en) * 2019-08-28 2019-11-29 北京工业大学 A kind of partial assembled formula Metro Station Structure design and construction method
CN211735509U (en) * 2019-12-31 2020-10-23 中车建设工程有限公司 Large-span composite structure type underground station

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106907159A (en) * 2017-03-27 2017-06-30 中铁隧道勘测设计院有限公司 A kind of Shallow Covered Metro Station separates open type structure and its construction method
CN106869172A (en) * 2017-04-01 2017-06-20 中交第二航务工程局有限公司 In-situ deposited prefabricated split-mounting type subway underground station construction method
CN108560562A (en) * 2018-05-24 2018-09-21 东南大学 A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill
CN208844444U (en) * 2018-08-02 2019-05-10 中国建筑股份有限公司 A kind of box beam ruggedized construction based on rope
CN108914966A (en) * 2018-08-15 2018-11-30 北京市政建设集团有限责任公司 A kind of open-cut station main structure and its construction method
CN110080295A (en) * 2019-04-23 2019-08-02 中铁第四勘察设计院集团有限公司 A kind of lid of assembled vault greatly across no column underground structure digs full-reverse construction method
CN110512647A (en) * 2019-08-28 2019-11-29 北京工业大学 A kind of partial assembled formula Metro Station Structure design and construction method
CN211735509U (en) * 2019-12-31 2020-10-23 中车建设工程有限公司 Large-span composite structure type underground station

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