Construction method of subway station auxiliary construction and shield construction simultaneously

Abstract

The application discloses a kind of construction methods of subway station auxiliary construction and shield construction synchronization, it has increased the horizontal and vertical displacement monitoring point of gantry crane track beam after installing shield construction to carry out, so as to real-time monitoring the influence caused by auxiliary construction to the running stability of gantry crane, guarantee the safety of shield construction.Then carry out station auxiliary structure construction, realize the synchronization of auxiliary construction in shield construction process, advance into auxiliary construction phase, after shield construction is completed, station auxiliary structure can be completed 90%, greatly speed up the construction progress, greatly shorten construction period.And, after shield construction is completed, only a small part of bored pile is reserved, to facilitate the whole area of post-cast strip construction to be completed once, after post-cast strip construction is completed, the small amount of bored pile reserved is cut off, the bored pile removal scheme is optimized, the construction progress of auxiliary structure is speeded up, and the auxiliary construction period is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit construction technology, in particular, to a construction method for synchronously carrying out metro station auxiliary construction and shield construction. BACKGROUND

[0002] The urban rail transit engineering is mostly underground structure, and has many construction procedures, from the pre-period traffic diversion pipeline relocation, to the station main body enclosure structure and main body structure construction, to the shield construction, and finally to the auxiliary construction, each time of procedure conversion needs to update the on-site temporary building arrangement, and the construction period is long. The previous rail transit construction area is mainly concentrated in the old city area, the allowable construction space range is small, the synchronous metro station auxiliary construction and shield construction cannot be realized, so the above construction procedures must be strictly followed, that is, the shield construction must be completed first and then the metro station auxiliary construction is carried out, and the construction period is long. Now the development of rail transit has entered the new city area, the road is wide, the allowable construction space range is large, which provides sufficient construction space for the synchronous auxiliary construction and shield construction, although the elevated scheme can also be adopted, the elevated scheme has short construction period and low cost, but the underground space resources cannot be fully utilized. Therefore, at present, a construction method for synchronously carrying out metro station auxiliary construction and shield construction is urgently needed, so as to effectively shorten the cycle of rail transit construction and improve the construction progress. SUMMARY

[0003] The present application provides a construction method for synchronously carrying out metro station auxiliary construction and shield construction, to solve the technical problem of long construction period of the existing rail transit engineering which needs to first carry out shield construction and then carry out auxiliary construction.

[0004] According to one aspect of the present application, a construction method for synchronously carrying out metro station auxiliary construction and shield construction is provided, comprising the following contents:

[0005] Carrying out gantry crane track beam construction above the main body structure crown beam;

[0006] Installing the gantry crane on the gantry crane track beam and carrying out shield construction;

[0007] On the basis of arranging design drawing monitoring points, increasing the horizontal and vertical displacement monitoring points of the gantry crane track beam, and collecting the initial values of each monitoring point;

[0008] Carrying out the construction of station auxiliary bored piles, crown beams, retaining walls, concrete supports, pile net spraying and steel supports;

[0009] Carrying out the construction of station auxiliary bottom plate;

[0010] After the stability of each monitoring point is monitored, removing the steel support, and carrying out the construction of station auxiliary side wall and station auxiliary top plate;

[0011] After shield construction is completed, the gantry crane is removed;

[0012] Some of the bored piles are reserved, and the rest of the bored piles are cut off;

[0013] The post-pouring belt construction is carried out;

[0014] The reserved bored piles are cut off;

[0015] The concrete support cutting-off, pipeline back-moving and roof back-filling construction are carried out;

[0016] The road surface recovery construction is carried out.

[0017] Further, the process of carrying out the gantry crane track beam construction above the crown beam of the main body structure of the station is specifically:

[0018] First, the reinforcement is planted above the crown beam of the main body structure, and the track beam column is constructed, then the gantry crane track beam is constructed above the track beam column, the reinforcement of the track beam column is anchored into the gantry crane track beam, and the bolt is pre-buried on the gantry crane track beam, then the steel rail is laid on the gantry crane track beam and the pressing plate is installed to be tightly fixed, and the pressing plate is fixed by the pre-buried bolt.

[0019] Further, when the reinforcement is planted above the crown beam of the main body structure, C16@200mm reinforcement is selected as the main reinforcement of the track beam column, the planting depth of the main reinforcement is 300mm, φ8@150mm reinforcement is selected as the stirrup, and the track beam column with a length of 0.8m, a width of 0.8m and a height of the ground is poured, and the distance between adjacent track beam columns is 1m.

[0020] Further, when the gantry crane track beam is constructed above the track beam column, C20@150mm reinforcement is selected as the main reinforcement of the gantry crane track beam, φ8@150mm reinforcement is selected as the stirrup, the distance between the pre-buried bolts is 500mm, one end of the bolt is 500mm deep into the gantry crane track beam, and the other end is 200mm exposed.

[0021] Further, when the bored pile construction within a range of 10m from the gantry crane is carried out, the operation of the gantry crane needs to be stopped, and the gantry crane is parked at a position away from the construction of the enclosing pile.

[0022] Further, when the station auxiliary bottom plate construction is carried out, a 3m gap is reserved between the station auxiliary bottom plate and the auxiliary enclosing pile, and the I-beam is used to top.

[0023] Further, when the station auxiliary top plate construction is carried out, a 3m gap is reserved between the station auxiliary top plate and the auxiliary enclosing pile.

[0024] Further, every five bored piles, one is reserved, the bored piles which are not reserved are cut off, and double-row steel bars are planted on the reserved bored piles along the radial direction of the bored piles, one end of the double-row steel bars is anchored in the bottom plate of the main structure and the top plate of the main structure, and the other end is suspended.

[0025] Further, before the construction of the post-pouring belt, the I-shaped steel between the station auxiliary bottom plate and the auxiliary retaining pile is removed, then the surface of the bored pile in the area where the reserved bored pile contacts with the bottom plate of the main structure and the top plate of the main structure is roughened, the water-swelling water-stop strip is pasted on the contact area, and then the shot pin is fixed, the sealing glue is coated on the bottom surface of the bored pile, and finally the grouting pipe is reserved, and after the completion of the post-pouring belt concrete pouring, the grouting sealing is carried out.

[0026] Further, 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 before the construction of the waterproof protection layer.

[0027] The present application has the following effects:

[0028] The construction method of the subway station auxiliary construction and the shield construction is synchronized, after the gantry crane is installed for shield construction, 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 subsequent auxiliary construction and the shield construction on the running stability of the gantry crane during the synchronization is monitored in real time, and the safety of the shield construction is ensured. After the monitoring points are arranged, the construction of the bored piles, the crown beam, the retaining wall, the concrete support, the net spraying between piles and the steel support of the station auxiliary is carried out, and the construction of the station auxiliary bottom plate, the station auxiliary side wall and the station auxiliary top plate is carried out, so that the station auxiliary construction is carried out during the shield construction process, the auxiliary construction stage is entered in advance, and after the completion of the shield construction, the station auxiliary structure can be 90% completed, the construction progress is greatly accelerated, and the construction period is greatly shortened. Moreover, after the completion of the shield construction, most of the bored piles are cut off, only a small part of the bored piles are reserved, the whole area of the post-pouring belt construction is completed at one time, and after the post-pouring belt construction is completed, the reserved small amount of bored piles are cut off. Compared with the existing method of cutting off the bored piles in different areas and then carrying out the post-pouring belt construction in different areas, the bored pile removal scheme is optimized, the construction progress of the auxiliary structure is greatly accelerated, and the auxiliary construction period is greatly shortened.

[0029] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in

[0031] Figure 1 is a flowchart of a construction method of synchronous construction of a subway station subsidiary and a shield construction, which is a preferred embodiment of the present application.

[0032] Figure 2 is a plan view of a station subsidiary and a gantry crane, which is a preferred embodiment of the present application.

[0033] Figure 3 is a cross-sectional view of A-A in Figure 2

[0034] Figure 4 is a layout diagram of a track beam column and a gantry crane track beam, which is a preferred embodiment of the present application.

[0035] Figure 5 is a plan view of a station subsidiary floor, which is a preferred embodiment of the present application.

[0036] Figure 6 is a plan view of a station subsidiary roof, which is a preferred embodiment of the present application.

[0037] Figure 7 is a waterproof sample diagram of a bored pile and a main structure floor and a main structure roof, which is a preferred embodiment of the present application. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered below.

[0039] As shown in Figures 1 to 7 , a preferred embodiment of the present application provides a construction method of synchronous construction of a subway station subsidiary and a shield construction, which includes the following contents:

[0040] Step S1: performing a construction of a gantry crane track beam above a main structure crown beam;

[0041] Step S2: installing a gantry crane on the gantry crane track beam and performing a shield construction;

[0042] Step S3: increasing a horizontal and vertical displacement monitoring point of the gantry crane track beam on the basis of a layout design drawing monitoring point, and collecting initial values of each monitoring point;

[0043] Step S4: performing a construction of a bored pile, a crown beam, a retaining wall, a concrete support, a net spray between piles and a steel support of the station subsidiary;

[0044] ​Step S5: Perform the construction of the station auxiliary floor;

[0045] Step S6: After monitoring the stability at each monitoring point, remove the steel support and perform the construction of the station auxiliary side wall and the station auxiliary roof;

[0046] Step S7: Remove the gantry crane after the completion of the shield construction;

[0047] Step S8: Reserve part of the bored pile and cut off the remaining bored pile;

[0048] Step S9: Perform the construction of the post-cast strip;

[0049] Step S10: Cut off the reserved bored pile;

[0050] Step S11: Perform the construction of the cutting off of the concrete support, the pipeline backfilling and the roof backfilling;

[0051] Step S12: Perform the construction of the road surface recovery.

[0052] It can be understood that the construction method of the subway station auxiliary construction synchronously performed with the shield construction in the embodiment, after the installation of the gantry crane for the shield construction, 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 as to monitor the influence of the subsequent auxiliary construction synchronously performed with the shield construction on the running stability of the gantry crane in real time, and the safety of the shield construction is ensured. After the arrangement of the monitoring points, the construction of the bored pile, the crown beam, the retaining wall, the concrete support, the net spraying between piles and the steel support of the station auxiliary structure, the construction of the station auxiliary floor, the station auxiliary side wall and the station auxiliary roof are performed, the station auxiliary construction is synchronously performed in the process of the shield construction, the auxiliary construction stage is entered in advance, and after the completion of the shield construction, the station auxiliary structure can be 90% constructed, the construction progress is greatly accelerated, and the construction period is greatly shortened. Moreover, after the completion of the shield construction, most of the bored piles are cut off, only a small part of the bored piles are reserved, the post-cast strip construction is completed in the whole area at one time, the small amount of reserved bored piles are cut off after the completion of the post-cast strip construction, compared with the existing method of cutting off the bored piles in the partition and then performing the post-cast strip construction in the partition, the bored pile removal scheme is optimized, the construction progress of the auxiliary structure is greatly accelerated, and thus the auxiliary construction period is greatly shortened.

[0053] It can be understood that in the step S1, the process of performing the construction of the gantry crane track beam above the crown beam of the station main structure is specifically as follows:

[0054] First, the reinforcement is planted above the main structure crown beam and the track beam column is made, then the gantry crane track beam is made above the track beam column, the reinforcement of the track beam column is anchored into the gantry crane track beam, and the bolt is pre-buried on the gantry crane track beam, then the steel rail is laid on the gantry crane track beam and the pressing plate is installed for pressing and fixing, and the pressing plate is fixed through the pre-buried bolt.

[0055] Specifically, first, C16@200mm reinforcement is planted as the main reinforcement of the track beam column above the main structure crown beam, the planting depth of the main reinforcement is 300mm, and then φ8@150mm reinforcement is selected as the stirrup, then a plurality of track beam columns with the length, width and height of 0.8m×0.8m and ground are poured, and the distance between adjacent track beam columns is 1m, so as to ensure the stability and reliability of the gantry crane track beam support structure. After the track beam column is made, the gantry crane track beam with the width and height of 0.5m×1m is made above the track beam column, C20@150mm reinforcement is selected as the main reinforcement of the gantry crane track beam, φ8@150mm reinforcement is selected as the stirrup, the bolt is pre-buried on the gantry crane track beam, the distance between the pre-buried bolts is 500mm, one end of the bolt is 500mm deep into the gantry crane track beam, and the other end is 200mm exposed, which is used for installing the pressing plate. After the gantry crane track beam is made, the 43kg / m steel rail is laid on the gantry crane track beam, and the pressing plate is laid above the steel rail, and the pressing plate is fixed by using the pre-buried bolt. In addition, the reinforcement of the track beam column is anchored into the gantry crane track beam for 35d, so as to ensure the stability of the connecting structure between the track beam column and the gantry crane track beam.

[0056] It can be understood that in the step S2, the 45t gantry crane and the 16t gantry crane are installed by using the automobile crane, and the 45t gantry crane and the 16t gantry crane are installed on the 43kg / m steel rail. Among them, the 45t gantry crane is used for shield slagging, and the 16t gantry crane is used for transporting pipe segments, grease and other materials. When the two gantry cranes are installed, the shield construction can be formally started.

[0057] 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 also increased, so as to monitor the horizontal and vertical movement of the gantry crane track beam in real time, so as to monitor the influence on the running stability of the gantry crane in real time during the auxiliary construction, and ensure the safety of the gantry crane during work, so as to ensure the safety of the shield construction. After the monitoring points are arranged, the initial value is collected, if the monitoring data is abnormal during the synchronous construction of the auxiliary construction and the shield construction, the construction should be stopped immediately, the reason should be found out, and the construction should be carried out after the monitoring is stable. Among them, the design drawing monitoring points include pile top horizontal displacement, pile top vertical displacement, support pile horizontal displacement, underground water level, pipeline settlement, ground surface settlement and the like.

[0058] It can be understood that in the step S4, after the monitoring point arrangement is completed, the construction of the station auxiliary structure can be carried out, and the construction of bored piles, crown beams, retaining walls, concrete supports, net spraying between piles and steel supports is carried out in detail. The construction content of each part belongs to the prior art, and therefore will not be described here. In addition, when the bored pile construction is carried out, in order to avoid collision of large equipment when the auxiliary construction is carried out synchronously with the shield construction, for example, the gantry crane of the shield construction and the rotary excavator of the bored pile construction are prone to collision accidents, and the vibration generated during the bored pile construction process is large, which will have a great influence on the horizontal and vertical displacement of the gantry crane track beam, thereby causing the monitoring data of the horizontal and vertical displacement monitoring points of the gantry crane track beam to be abnormal. Therefore, as preferred, when the bored pile construction within a range of 10 m from the gantry crane is carried out, the operation of the gantry crane needs to be stopped, and the gantry crane is parked at a position away from the construction of the enclosure pile, so as to avoid collision accidents and improve the accuracy of the operation monitoring of the gantry crane.

[0059] It can be understood that in the step S5, when the station auxiliary floor construction is carried out, a 3m gap is reserved between the station auxiliary floor and the auxiliary enclosure pile, so as to facilitate subsequent removal of the auxiliary enclosure pile by cutting and lifting out, and 25b H-shaped steel is used for counter-jacking, which ensures the structural stability of the auxiliary floor. The spacing of the H-shaped steel is 1300mm, and the H-shaped steel is required to resist the auxiliary enclosure pile.

[0060] It can be understood that in the step S6, after the counter-jacking of the auxiliary floor and the auxiliary enclosure pile is completed and the monitoring data is stable, the steel support can be removed, and after the steel support is removed, the construction of the station auxiliary side wall, the auxiliary structure partition wall and the station auxiliary roof is carried out. When the station auxiliary roof construction is carried out, a 3m gap is reserved between the station auxiliary roof and the auxiliary enclosure pile, so as to facilitate subsequent removal of the auxiliary enclosure pile by cutting and lifting out.

[0061] It can be understood that in the step S7, after the shield construction is completed, the 45t gantry crane and the 16t gantry crane are removed by the automobile crane. In addition, before the shield construction is completed, the monitoring situation should be paid attention to every day, and if there is abnormal data, corresponding measures should be taken immediately.

[0062] It can be understood that in the step S8, every five bored piles, one is reserved, the reserved bored piles are connected with the bottom plate of the main structure and the top plate of the main structure in the later stage, and the non-reserved bored piles are cut off by using the way of rope saw and manual breaking. Moreover, double-row C18 steel bars (selecting 18mm threaded steel) are planted on the reserved bored piles along the radial direction of the bored piles, the double-row C18 steel bars are arranged in upper and lower rows, the interval is 200mm, one end of the double-row steel bars is anchored in the bottom plate of the main structure and the top plate of the main structure, and the other end is suspended, that is, the end close to the post-pouring belt is suspended. It can be understood that before the post-pouring belt construction, most of the bored piles are cut off, only a small part of the bored piles are reserved, so that the post-pouring belt construction can be completed at one time in the whole area, and the double-row steel bars are planted in the radial direction of the reserved bored piles, one end of the double-row steel bars is respectively anchored in the bottom plate of the main structure and the top plate of the main structure, and the other end is suspended, after the post-pouring belt is completed, the connection structure between the main structure, the bored pile and the post-pouring belt is strengthened by the double-row steel bars. The existing bored pile breaking scheme is that the post-pouring belt is divided into multiple areas, for each area, the bored piles are cut off first and then the concrete is poured, and the construction is carried out gradually according to the area. Therefore, the bored pile breaking scheme of the present application is optimized compared with the existing scheme of breaking and pouring in the subarea, the post-pouring belt construction can be completed at one time in the whole area, the construction progress of the auxiliary structure is greatly accelerated, thereby the auxiliary construction period is greatly shortened, and the overall construction period is further shortened. As an optimization, the number of double-row C18 steel bars is multiple groups, and the multiple groups of double-row steel bars are uniformly distributed along the circumference of the bored pile. In addition, the specific post-pouring belt construction content belongs to the prior art, and therefore will not be described here.

[0063] Optionally, before the post-pouring belt construction, the I-shaped steel between the station auxiliary bottom plate and the auxiliary enclosing pile needs to be removed first, preferably the jump bay construction method is adopted, and the length removed at one time should not be greater than 10m. Then, the surface of the bored pile in the area where the reserved bored pile contacts with the bottom plate of the main structure and the top plate of the main structure is roughened, wherein the contact surfaces of the bored pile with the bottom plate of the main structure and the top plate of the main structure are approximately at 1 / 3 height and 2 / 3 height of the bored pile respectively, and the water-swelling water-stop strip is pasted on the contact area and then fixed by nailing, then the bottom surface of the bored pile is coated with sealant, and finally the grouting pipe is reserved, the interval of the grouting pipe is 2m, and the grouting sealing is carried out after the post-pouring belt is completed. It can be understood that the contact between the reserved bored pile and the bottom plate of the main structure, the top plate of the main structure is sealed by the sealant, the water-swelling water-stop strip and the later grouting of the embedded grouting pipe, which can achieve good sealing effect.

[0064] It can be understood that in the step S10, after the post-cast strip construction is completed, the reserved bored pile is cut off by using a rope saw. Alternatively, after the reserved bored pile is 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 waterproof protective layer is constructed, so as to ensure the waterproof property of the top plate of the main structure.

[0065] It can be understood that in the step S11, the concrete support attached to the station is cut off, and the pipeline back migration and the top plate back filling construction are performed. When the top plate is back filled, a compaction experiment needs to be performed every 30 cm, so as to ensure the compaction degree of the back filled soil.

[0066] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction, characterized in that, Includes the following: Step S1: Construct the gantry crane track beam above the main structure cap beam; Step S2: Install the gantry crane on the gantry crane track beam and carry out shield tunneling; Step S3: Based on the monitoring points in the design drawings, add horizontal and vertical displacement monitoring points for the gantry crane track beam, and collect the initial values ​​of each monitoring point; Step S4: Construct the station's auxiliary bored piles, capping beams, retaining walls, concrete supports, inter-pile shotcrete, and steel supports; Step S5: Construct the station's auxiliary foundation slab; Step S6: After the steel supports are removed and the station's auxiliary side walls and roof slab are constructed, the station is stabilized at each monitoring point. Step S7: Dismantle the gantry crane after the tunnel boring machine (TBM) construction is completed; Step S8: Reserve a portion of the bored piles and cut off the remaining bored piles. Reserve one bored pile every five piles, cut off the unreserved bored piles, and insert double rows of steel bars into the reserved bored piles along their radial direction. One end of the double rows of steel bars is anchored in the bottom slab and top slab of the main structure, and the other end is suspended. Step S9: Construct the post-pouring strip; Step S10: Cut off the reserved bored piles; Step S11: Carry out concrete support removal, pipeline relocation, and roof slab backfilling. Step S12: Carry out road surface restoration work.

2. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 1, characterized in that, The specific construction process of the gantry crane track beam above the main structure cap beam is as follows: First, reinforcing bars are installed above the main structure's cap beam, and track beam columns are constructed. Then, the gantry crane track beam is constructed above the track beam columns. The reinforcing bars of the track beam columns are anchored into the gantry crane track beam, and bolts are pre-embedded on the gantry crane track beam. Next, steel rails are laid on the gantry crane track beam, and pressure plates are installed for tightening and fixing. The pressure plates are fixed by pre-embedded bolts.

3. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 2, characterized in that, When installing reinforcing bars above the main structure cap beam, C16@200mm steel bars are selected as the main reinforcing bars of the track beam column. The installation depth of the main reinforcing bars is 300mm. φ8@150mm steel bars are selected as stirrups. The track beam column with a length and width of 0.8m×0.8m and a height of ground is cast out. The spacing between adjacent track beam columns is 1m.

4. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 2, characterized in that, When constructing the gantry crane track beam above the track beam column, C20@150mm steel bars are selected as the main reinforcement of the gantry crane track beam, and φ8@150mm steel bars are selected as the stirrups. The spacing of the pre-embedded bolts is 500mm, one end of the bolt is inserted into the gantry crane track beam 500mm, and the other end is exposed 200mm.

5. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 1, characterized in that, When drilling and grouting piles within 10 meters of the gantry crane, the operation of the gantry crane must be stopped and the gantry crane should be parked at a location far away from the construction of the retaining piles.

6. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 1, characterized in that, During the construction of the station's auxiliary base slab, a 3m gap was reserved between the station's auxiliary base slab and the auxiliary retaining piles, and I-beams were used for jacking.

7. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 1, characterized in that, When constructing the station's auxiliary roof slab, a 3m gap is reserved between the station's auxiliary roof slab and the auxiliary retaining piles.

8. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 6, characterized in that, Before constructing the post-cast strip, the I-beams that align with the station's auxiliary base slab and auxiliary retaining piles must be removed. Then, the surface of the pre-reserved bored piles in the area where they contact the main structure's base slab and top slab must be roughened. After applying water-swellable sealing strips to the contact area, they must be fixed with nails. Next, sealant must be applied to the bottom surface of the bored piles. Finally, grouting pipes must be pre-installed. Grouting and sealing will be carried out after the post-cast strip is completed and the concrete is poured.

9. The construction method for simultaneously carrying out subway station ancillary construction and shield tunneling construction as described in claim 1, characterized in that, After removing the reserved bored piles, a waterproof reinforcement layer is added to the top slab of the main structure corresponding to each reserved bored pile before the waterproof protective layer is constructed.

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