CN116220760A - Construction method for synchronously carrying out auxiliary construction and shield construction of subway station - Google Patents
Construction method for synchronously carrying out auxiliary construction and shield construction of subway station Download PDFInfo
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- CN116220760A CN116220760A CN202310274281.9A CN202310274281A CN116220760A CN 116220760 A CN116220760 A CN 116220760A CN 202310274281 A CN202310274281 A CN 202310274281A CN 116220760 A CN116220760 A CN 116220760A
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- 238000010276 construction Methods 0.000 title claims abstract description 192
- 238000012544 monitoring process Methods 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 60
- 239000010959 steel Substances 0.000 claims description 60
- 238000003825 pressing Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 3
- 210000001503 joint Anatomy 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000003292 glue Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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Abstract
The invention discloses a construction method for synchronously carrying out auxiliary construction and shield construction of a subway station, which is characterized in that horizontal and vertical displacement monitoring points of a gantry crane track beam are added after a gantry crane is installed for shield construction, so that the influence of the auxiliary construction on the operation stability of the gantry crane is monitored in real time, and the safety of the shield construction is ensured. Then station auxiliary structure construction is carried out, station auxiliary construction is synchronously carried out in the shield construction process, the auxiliary construction stage is advanced, the station auxiliary structure can be constructed to be 90% after the shield construction is completed, the construction progress is greatly accelerated, and the construction period is greatly shortened. And only a small number of bored piles are reserved after the shield construction is completed, so that the construction of the post-cast strip is completed in a whole area at one time, and the reserved small number of bored piles are cut off after the construction of the post-cast strip is completed, so that the bored pile dismantling scheme is optimized, the construction progress of an auxiliary structure is accelerated, and the auxiliary construction period is shortened.
Description
Technical Field
The invention relates to the technical field of rail transit construction, in particular to a construction method for synchronously carrying out auxiliary construction and shield construction of a subway station.
Background
Urban rail transit engineering is mostly an underground structure, construction procedures are numerous, the pipeline is changed from the prior traffic untangling, construction is carried out on a main building envelope and a main structure of a station, shield construction is carried out, and finally, auxiliary construction is carried out, and each procedure conversion needs to be carried out on-site temporary construction arrangement, so that the construction period is long. The prior rail transit construction area is mainly concentrated in the old urban area, the allowed construction space range is small, and the auxiliary construction of the subway station and the shield construction cannot be synchronously carried out, so that the construction process is strictly carried out, namely the auxiliary construction of the subway station is carried out after the shield construction is carried out, and the construction period is long. The development of the rail transit at present enters a newcastle area, the road is wide, the allowed construction space range is large, and sufficient construction space is provided for synchronous auxiliary construction and shield construction. Therefore, a construction method for synchronously carrying out the auxiliary construction of the subway station and the shield construction is needed at present, so that the period of track traffic construction can be effectively shortened, and the construction progress can be improved.
Disclosure of Invention
The invention provides a construction method for synchronously carrying out auxiliary construction and shield construction of a subway station, which aims to solve the technical problem that the construction period is long when the auxiliary construction is carried out after the shield construction is carried out in the prior rail traffic engineering.
According to one aspect of the invention, there is provided a construction method for synchronously performing auxiliary construction and shield construction of a subway station, comprising the following steps:
constructing a gantry crane track beam above the crown beam of the main body structure;
installing a gantry crane on the gantry crane track beam and performing shield construction;
the method comprises the steps that on the basis of arranging monitoring points of a design drawing, horizontal and vertical displacement monitoring points of a gantry crane track beam are added, and initial values of all the monitoring points are collected;
carrying out construction of a bored pile, a crown beam, a retaining wall, a concrete support, inter-pile net spraying and a steel support attached to a station;
constructing an auxiliary bottom plate of the station;
removing the steel support after monitoring stability at each monitoring point, and carrying out construction on the station auxiliary side wall and the station auxiliary top plate;
removing the gantry crane after the shield construction is completed;
reserving part of the bored piles and cutting off the rest of the bored piles;
carrying out post-pouring belt construction;
cutting off the reserved bored pile;
carrying out concrete support cutting, pipeline returning and roof backfilling construction;
and (5) performing pavement restoration construction.
Further, the construction process of the gantry crane track beam above the crown beam of the station main body structure specifically comprises the following steps:
the steel bar is planted above the crown beam of the main body structure and is applied to the rail Liang Zhuzi, the rail beam column is Fang Shizuo the gantry crane rail beam, the steel bar of the rail Liang Zhuzi is anchored into the gantry crane rail beam, bolts are embedded in the gantry crane rail beam, steel rails are paved on the gantry crane rail beam, and a pressing plate is installed for pressing and fixing, and is fixed through the embedded bolts.
Further, when the steel bar is planted above the crown beam of the main structure, C16@200mm steel bars are selected as main steel bars of the track Liang Zhuzi, the depth of the planted steel bars of the main steel bars is 300mm, phi 8@150mm steel bars are selected as stirrups, the track Liang Zhuzi with the length and width of 0.8mx0.8m and the height of the ground is cast, and the distance between adjacent tracks Liang Zhuzi is 1m.
Further, when the Fang Shizuo gantry crane track beam is arranged on the track beam column, C20@150mm steel bars are selected as main bars of the gantry crane track beam, phi 8@150mm steel bars are selected as stirrups, the distance between the embedded bolts is 500mm, one end of each bolt penetrates into the gantry crane track beam by 500mm, and the other end of each bolt is exposed by 200mm.
Further, when the bored pile construction is performed within 10m from the gantry crane, the operation of the gantry crane is stopped, and the gantry crane is stopped at a position far from the fender pile construction.
Further, when the station auxiliary bottom plate is constructed, a 3m gap is reserved between the station auxiliary bottom plate and the auxiliary guard piles, and I-steel is adopted for butt-jacking.
Further, when the station auxiliary roof is constructed, a 3m gap is reserved between the station auxiliary roof and the auxiliary fender post.
Further, every five bored piles are reserved, unreserved bored piles are cut off, double rows of steel bars are implanted in the reserved bored piles along the radial direction of the reserved bored piles, one ends of the double rows of steel bars are anchored in the bottom plate and the top plate of the main structure, and the other ends of the double rows of steel bars are suspended.
Further, before the post-cast strip construction is carried out, the I-steel on the butt between the station auxiliary bottom plate and the auxiliary guard piles is required to be removed firstly, then the surface of the bored pile is roughened in the contact area of the reserved bored pile, the main structure bottom plate and the main structure top plate, the contact area is stuck with a water-swelling water stop strip and then fixed by a shooting nail, the bottom surface of the bored pile is coated with sealant, and finally a grouting pipe is reserved, and grouting sealing is carried out after the post-cast strip finishes concrete pouring.
Further, after the reserved bored piles are cut off, a waterproof reinforcing layer is added on the top plate of the main body structure corresponding to each reserved bored pile, and then the waterproof protection layer is constructed.
The invention has the following effects:
according to the construction method for synchronously carrying out the auxiliary construction of the subway station and the shield construction, after the shield construction is carried out by installing the gantry crane, the horizontal and vertical displacement monitoring points of the gantry crane track beam are added on the basis of the conventional design monitoring points, so that the influence of the auxiliary construction process on the operation stability of the gantry crane in the same step of the subsequent auxiliary construction and the shield construction is monitored in real time, and the safety of the shield construction is ensured. After the monitoring points are arranged, construction of station subsidiary bored piles, crown beams, retaining walls, concrete supports, inter-pile net spraying and steel supports is carried out, and construction of station subsidiary bottom plates, station subsidiary side walls and station subsidiary top plates is achieved, so that station subsidiary construction is synchronously carried out in the shield construction process, subsidiary construction stages are advanced, the station subsidiary structure can be constructed to complete 90% after the shield construction is completed, construction progress is greatly accelerated, and construction period is greatly shortened. And after the shield construction is finished, most of the bored piles are firstly cut off, only a small part of the bored piles are reserved, the whole area of post-cast strip construction is conveniently finished at one time, and the reserved small amount of bored piles are cut off after the post-cast strip construction is finished.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a flow chart of a construction method of synchronizing the auxiliary construction of a subway station with the shield construction according to the preferred embodiment of the present invention.
Fig. 2 is a schematic plan view of a station attachment and gantry crane according to a preferred embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view at A-A in fig. 2.
Fig. 4 is a schematic layout of the track Liang Zhuzi and gantry crane track beams of a preferred embodiment of the present invention.
Fig. 5 is a schematic plan view of a station attachment floor according to a preferred embodiment of the present invention.
Fig. 6 is a schematic plan view of a station attachment roof according to a preferred embodiment of the present invention.
Fig. 7 is a schematic view showing a waterproof mass pattern of a bored pile according to a preferred embodiment of the present invention with a bottom plate of a main body structure and a top plate of the main body structure.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.
As shown in fig. 1 to 7, a preferred embodiment of the present invention provides a construction method for synchronizing an accessory construction of a subway station with a shield construction, comprising the following steps:
step S1: constructing a gantry crane track beam above the crown beam of the main body structure;
step S2: installing a gantry crane on the gantry crane track beam and performing shield construction;
step S3: the method comprises the steps that on the basis of arranging monitoring points of a design drawing, horizontal and vertical displacement monitoring points of a gantry crane track beam are added, and initial values of all the monitoring points are collected;
step S4: carrying out construction of a bored pile, a crown beam, a retaining wall, a concrete support, inter-pile net spraying and a steel support attached to a station;
step S5: constructing an auxiliary bottom plate of the station;
step S6: removing the steel support after monitoring stability at each monitoring point, and carrying out construction on the station auxiliary side wall and the station auxiliary top plate;
step S7: removing the gantry crane after the shield construction is completed;
step S8: reserving part of the bored piles and cutting off the rest of the bored piles;
step S9: carrying out post-pouring belt construction;
step S10: cutting off the reserved bored pile;
step S11: carrying out concrete support cutting, pipeline returning and roof backfilling construction;
step S12: and (5) performing pavement restoration construction.
It can be understood that in the construction method for synchronously performing the auxiliary construction of the subway station and the shield construction, after the shield construction is performed by installing the gantry crane, the horizontal and vertical displacement monitoring points of the gantry crane track beam are added on the basis of the conventionally designed monitoring points, so that the influence of the auxiliary construction process on the operation stability of the gantry crane during the follow-up auxiliary construction and the shield construction in the same step is monitored in real time, and the safety of the shield construction is ensured. After the monitoring points are arranged, construction of station subsidiary bored piles, crown beams, retaining walls, concrete supports, inter-pile net spraying and steel supports is carried out, and construction of station subsidiary bottom plates, station subsidiary side walls and station subsidiary top plates is achieved, so that station subsidiary construction is synchronously carried out in the shield construction process, subsidiary construction stages are advanced, the station subsidiary structure can be constructed to complete 90% after the shield construction is completed, construction progress is greatly accelerated, and construction period is greatly shortened. And after the shield construction is finished, most of the bored piles are firstly cut off, only a small part of the bored piles are reserved, the whole area of post-cast strip construction is conveniently finished at one time, and the reserved small amount of bored piles are cut off after the post-cast strip construction is finished.
It can be understood that in the step S1, the construction process of the gantry crane track beam above the crown beam of the station main body structure specifically includes:
the steel bar is planted above the crown beam of the main body structure and is applied to the rail Liang Zhuzi, the rail beam column is Fang Shizuo the gantry crane rail beam, the steel bar of the rail Liang Zhuzi is anchored into the gantry crane rail beam, bolts are embedded in the gantry crane rail beam, steel rails are paved on the gantry crane rail beam, and a pressing plate is installed for pressing and fixing, and is fixed through the embedded bolts.
Specifically, C16@200mm steel bars are firstly implanted above a crown beam of a main structure to serve as main bars of a rail Liang Zhuzi, the depth of the implanted bars of the main bars is 300mm, phi 8@150mm steel bars are selected to serve as stirrups, then a plurality of uniformly arranged rails Liang Zhuzi with the length and width of 0.8mx0.8m and the height of the ground are poured, and the distance between adjacent rails Liang Zhuzi is 1m, so that the stability and the reliability of a gantry crane rail beam supporting structure are ensured. After the rail Liang Zhuzi is applied, a Fang Shizuo wide and high gantry crane rail beam with the height of 0.5m multiplied by 1m is arranged on a rail beam column, C20@150mm steel bars are selected as main bars of the gantry crane rail beam, phi 8@150mm steel bars are selected as stirrups, bolts are pre-buried on the gantry crane rail beam, the distance between the pre-buried bolts is 500mm, one end of each bolt penetrates into the gantry crane rail beam by 500mm, and the other end of each bolt is exposed by 200mm and is used for installing a pressing plate. After the gantry crane rail Liang Shizuo is finished, a 43kg/m steel rail is paved on the gantry crane rail beam, a pressing plate is paved above the steel rail, and the pressing plate is fixed by utilizing the embedded bolts. In addition, the reinforcing bars of the rail Liang Zhuzi are anchored into the gantry rail beam 35d to ensure stability of the connection structure between the rail Liang Zhuzi and the gantry rail beam.
It will be appreciated that in said step S2, 45t gantry cranes and 16t gantry cranes are mounted using truck cranes, and 45t gantry cranes and 16t gantry cranes are mounted on 43kg/m rails. The 45t gantry cranes are used for shield deslagging, the 16t gantry cranes are used for transporting materials such as duct pieces and grease, and shield construction can be formally started after the two gantry cranes are installed.
It can be understood that in the step S3, on the basis of the monitoring points arranged according to the design drawing, the horizontal and vertical displacement monitoring points of the gantry crane track beam are further added, so that the horizontal movement and the vertical movement of the gantry crane track beam can be monitored in real time, the influence on the operation stability of the gantry crane during the auxiliary construction can be monitored in real time, the safety of the gantry crane during the working can be ensured, and the safety of the shield construction can be ensured. And acquiring an initial value after the arrangement of the monitoring points is completed, if monitoring data is abnormal in the synchronous construction process of the auxiliary construction and the shield construction, immediately stopping the construction, finding out the reason, and carrying out the construction after the monitoring is stable. The design drawing monitoring points comprise pile top horizontal displacement, pile top vertical displacement, support pile horizontal displacement, ground water level, pipeline settlement, ground surface settlement and other monitoring points.
It can be understood that in the step S4, after the arrangement of the monitoring points is completed, the construction of the station auxiliary structure can be performed, specifically, the construction of the bored pile, the crown beam, the retaining wall, the concrete support, the inter-pile net spraying and the steel support is performed, wherein the construction content of each part belongs to the prior art, and therefore, the description is not repeated here. In addition, when carrying out the bored concrete pile construction, in order to avoid subordinate construction and shield construction to bump with large-scale equipment when walking simultaneously, for example the portal crane of shield construction and the machine of digging soon of bored concrete pile construction appear the collision accident easily, and the vibration that produces in the bored concrete pile construction simultaneously is great, can cause very big influence to portal crane track roof beam's horizontal and vertical displacement to can lead to portal crane track roof beam horizontal and vertical displacement monitoring point's monitoring data to be unusual. Therefore, as a preference, when the bored pile construction is performed within 10m from the gantry crane, the operation of the gantry crane is stopped, and the gantry crane is stopped at a position far away from the fender post construction, so that collision accidents are avoided, and the accuracy of operation monitoring of the gantry crane is improved.
It can be understood that in the step S5, when the station auxiliary bottom plate is constructed, a 3m gap is reserved between the station auxiliary bottom plate and the auxiliary fender post, so that the subsequent removal of the throwing rib and the auxiliary fender post is convenient, and the auxiliary bottom plate is lifted out, and the structure stability of the auxiliary bottom plate is ensured by adopting 25b I-steel, wherein the interval between the I-steel is 1300mm, and the I-steel is required to prop against the auxiliary fender post.
It can be understood that in the step S6, the steel support can be removed after the auxiliary bottom plate and the auxiliary fender post are opposite to each other and the monitoring data are stable, and the construction of the station auxiliary side wall, the auxiliary structure partition wall and the station auxiliary top plate is performed after the steel support is removed. When the station auxiliary top plate is constructed, a 3m gap is reserved between the station auxiliary top plate and the auxiliary fender post, so that the subsequent throwing rib and the auxiliary fender post are conveniently removed and lifted out.
It will be appreciated that in the step S7, after the shield construction is completed, the 45t gantry crane and the 16t gantry crane are dismantled by using the truck crane. In addition, before the shield construction is completed, the monitoring condition should be paid attention to every day, and if data are abnormal, corresponding measures should be immediately taken.
It can be understood that in the step S8, one bored pile is reserved every five bored piles, the reserved bored piles are connected with the bottom plate and the top plate of the main body structure in the later period, and the unreserved bored piles are cut off by adopting a rope saw and a manual breaking mode. And, implant double C18 reinforcing bars (select for use 18mm screw thread steel) along its radial direction on the drilling bored concrete pile that reserves, double C18 reinforcing bars are arranged from top to bottom, and the interval is 200mm, and the one end anchor of double reinforcing bars is in main structure bottom plate and main structure roof, and the other end is unsettled, is close to the unsettled one end of post-cast strip promptly. It can be understood that before post-cast strip construction, most of the bored pile is cut off, only a small part of the bored pile is reserved, so that the post-cast strip construction is completed in a whole area at one time, double-row steel bars are implanted in the radial direction of the reserved bored pile, one ends of the double-row steel bars are respectively anchored in a main structure bottom plate and a main structure top plate, the other ends of the double-row steel bars are suspended, and after the post-cast strip completes concrete pouring, the stability of the connecting structure among the main structure, the bored pile and the post-cast strip pouring concrete is enhanced through the double-row steel bars. The existing cast-in-situ bored pile breaking scheme is as follows: dividing the post-cast strip into a plurality of areas, firstly cutting out the bored piles for each area, then pouring concrete, and constructing according to the areas step by step. Therefore, compared with the existing partition breaking and pouring scheme, the scheme for breaking the bored pile is optimized, the whole construction area of the post-cast strip can be completed at one time, the construction progress of an auxiliary structure is greatly accelerated, the auxiliary construction period is greatly shortened, and the whole construction period is further shortened. Preferably, the number of the double-row C18 steel bars is multiple, and the multiple groups of double-row steel bars are uniformly distributed along the circumferential direction of the bored pile. In addition, the concrete post-cast strip construction content belongs to the prior art, so that the details are not repeated here.
Optionally, before post-cast strip construction is carried out, the I-steel on the opposite roof between the station auxiliary bottom plate and the auxiliary guard piles is required to be removed, a construction method of jumping bins is preferably adopted, and the removal length at one time is not more than 10m. Then, roughening the surface of the bored pile in the contact area of the reserved bored pile, the main structure bottom plate and the main structure top plate, wherein the contact surfaces of the bored pile, the main structure bottom plate and the main structure top plate are respectively approximately at 1/3 height and 2/3 height of the bored pile, the contact area is stuck with a water-swelling water stop strip and then fixed by a shooting nail, the bottom surface of the bored pile is coated with sealant, finally, grouting pipes are reserved, the distance between the grouting pipes is 2m, and grouting sealing is carried out after the post-pouring strip finishes concrete pouring. It can be understood that the contact part of the reserved bored pile, the main structure bottom plate and the main structure top plate is sealed by means of sealing glue, water-swelling water stop bars and post grouting of the pre-buried grouting pipe, so that a good sealing effect can be realized.
It will be appreciated that in step S10, after the post-cast strip construction is completed, the reserved bored pile is cut off using a rope saw. Optionally, after the reserved bored piles are cut off, a waterproof reinforcing layer is added on the main body structure top plate corresponding to each reserved bored pile, and then the waterproof protection layer is constructed, so that the waterproofness of the main body structure top plate is ensured.
It can be understood that in the step S11, the attached concrete support of the station is cut off, and the pipeline returning and the roof backfilling construction are performed, and when the roof is backfilled, a compaction degree experiment needs to be performed every 30cm to ensure the compaction degree of the backfilled soil.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The construction method for synchronously carrying out the auxiliary construction and the shield construction of the subway station is characterized by comprising the following steps:
constructing a gantry crane track beam above the crown beam of the main body structure;
installing a gantry crane on the gantry crane track beam and performing shield construction;
the method comprises the steps that on the basis of arranging monitoring points of a design drawing, horizontal and vertical displacement monitoring points of a gantry crane track beam are added, and initial values of all the monitoring points are collected;
carrying out construction of a bored pile, a crown beam, a retaining wall, a concrete support, inter-pile net spraying and a steel support attached to a station;
constructing an auxiliary bottom plate of the station;
removing the steel support after monitoring stability at each monitoring point, and carrying out construction on the station auxiliary side wall and the station auxiliary top plate;
removing the gantry crane after the shield construction is completed;
reserving part of the bored piles and cutting off the rest of the bored piles;
carrying out post-pouring belt construction;
cutting off the reserved bored pile;
carrying out concrete support cutting, pipeline returning and roof backfilling construction;
and (5) performing pavement restoration construction.
2. The method for synchronously performing the auxiliary construction and the shield construction of the subway station according to claim 1, wherein the construction of the gantry crane track beam above the crown beam of the main body structure of the station comprises the following steps:
the steel bar is planted above the crown beam of the main body structure and is applied to the rail Liang Zhuzi, the rail beam column is Fang Shizuo the gantry crane rail beam, the steel bar of the rail Liang Zhuzi is anchored into the gantry crane rail beam, bolts are embedded in the gantry crane rail beam, steel rails are paved on the gantry crane rail beam, and a pressing plate is installed for pressing and fixing, and is fixed through the embedded bolts.
3. The construction method for synchronously carrying out the auxiliary construction and the shield construction of the subway station according to claim 2, wherein when the steel bar is planted above the crown beam of the main structure, C16@200mm steel bars are selected as main steel bars of the track Liang Zhuzi, the depth of the planted steel bars of the main steel bars is 300mm, phi 8@150mm steel bars are selected as stirrups, the track Liang Zhuzi with the length and width of 0.8mx0.8m and the height of the ground is cast, and the distance between adjacent tracks Liang Zhuzi is 1m.
4. The construction method for synchronously carrying out auxiliary construction and shield construction of the subway station according to claim 2, wherein when a Fang Shizuo gantry crane track beam is arranged on a track beam column, C20@150mm steel bars are selected as main bars of the gantry crane track beam, phi 8@150mm steel bars are selected as stirrups, the distance between embedded bolts is 500mm, one end of each bolt penetrates into the gantry crane track beam by 500mm, and the other end of each bolt is exposed by 200mm.
5. The method according to claim 1, wherein the operation of the gantry crane is stopped and the gantry crane is stopped at a position far from the fender pile construction when the bored pile construction is performed within 10m from the gantry crane.
6. The method according to claim 1, wherein 3m gap is reserved between the station auxiliary bottom plate and the auxiliary fender post and the h-steel is adopted for butt joint when the station auxiliary bottom plate is constructed.
7. The method for simultaneous construction of subway station attachment construction and shield construction according to claim 1, wherein a 3m gap is reserved between the station attachment roof and the attachment fender post when the station attachment roof construction is performed.
8. The construction method for synchronously carrying out auxiliary construction and shield construction of the subway station according to claim 1, wherein each five bored piles are reserved, the unreserved bored piles are cut off, double-row reinforcing steel bars are implanted on the reserved bored piles along the radial direction of the reserved bored piles, one ends of the double-row reinforcing steel bars are anchored in the bottom plate and the top plate of the main structure, and the other ends of the double-row reinforcing steel bars are suspended.
9. The construction method for synchronously carrying out the auxiliary construction of the subway station and the shield construction according to claim 6, wherein before the construction of the post-cast strip, the I-steel on the top between the auxiliary bottom plate of the station and the auxiliary guard piles is removed, then the surface of the bored pile is roughened in the contact area of the reserved bored pile, the main structure bottom plate and the main structure top plate, the contact area is stuck with a water-swelling water stop strip and then fixed by a shooting nail, the bottom surface of the bored pile is coated with sealant, a grouting pipe is reserved, and grouting sealing is carried out after the post-cast strip finishes concrete pouring.
10. The construction method for synchronously carrying out auxiliary construction and shield construction of the subway station according to claim 1, wherein after the reserved bored piles are cut off, a waterproof reinforcing layer is added on the top plate of the main structure corresponding to each reserved bored pile, and then the construction of the waterproof protection layer is carried out.
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| CN202310274281.9A CN116220760A (en) | 2023-03-20 | 2023-03-20 | Construction method for synchronously carrying out auxiliary construction and shield construction of subway station |
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| CN202310274281.9A CN116220760A (en) | 2023-03-20 | 2023-03-20 | Construction method for synchronously carrying out auxiliary construction and shield construction of subway station |
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