Construction method for realizing rapid traffic side change and removing temporary columns by using temporary piers

Abstract

The present invention discloses a construction method for realizing rapid traffic side change and removing temporary columns by using temporary piers, which includes: constructing diaphragm walls to form retaining walls on both sides inside the subway station, dividing the width direction between the two retaining walls into two phases; constructing temporary column piles at intervals along the length direction of the retaining walls at the position between the two phases; laying the preliminary roads at the top positions of both phases, and reserving an excavation outlet corresponding to one of the phases; laying a structural roof slab at a position near the top between the two retaining walls on both sides; constructing the subway station layer by layer from top to bottom; sealing the wall at the position of the structural roof slab corresponding to the excavation hole, backfilling the position of the first phase corresponding to the excavation hole and laying the later road; removing the preliminary road and the temporary column piles, sealing the wall at the position of the structural roof slab corresponding to the hole, backfilling the position of the first phase corresponding to the hole and laying the later road. This application can reduce the traffic obstruction degree at the location of the subway station during the construction of a column-free subway station.

Description

Technical Field

[0001] The invention relates to the field of subway construction, and in particular to a construction method for realizing rapid traffic inversion and removing temporary columns by using temporary piers. Background Art

[0002] At present, with the continuous improvement of transportation facilities, subway transportation has become an important way for people to travel. Therefore, subway construction has become an important part of today's urban construction. Among them, subway stations are an important part of the subway, which are used to provide a place for railway trains to stop for the urban rail transit system.

[0003] At present, in order to increase the internal space of the subway station after construction, a column-free subway station will be used, and this type of subway station is constructed using the cover-and-cut method.

[0004] With respect to the above-mentioned related technologies, the inventor believes that when the cover-and-cut method is used for construction, the area directly above the subway station is inaccessible to traffic, thus causing serious obstruction to traffic during the subway construction process. Summary of the invention

[0005] In order to reduce the degree of traffic obstruction at the location of the subway station during the construction of a column-free subway station, the present application provides a construction method for realizing rapid traffic inversion and removing temporary columns by using temporary piers.

[0006] The present application provides a construction method for realizing rapid traffic inversion and removing temporary columns by using temporary piers, which adopts the following technical solutions:

[0007] A construction method for realizing rapid traffic inversion and removing temporary columns by using temporary piers, the construction method has the following operation steps:

[0008] Step 1: Construction of underground continuous walls to form retaining walls on both sides of the subway station, dividing the width between the retaining walls on both sides into two phases;

[0009] Step 2: construct temporary column piles at intervals along the length direction of the retaining wall between the two phases;

[0010] Step 3: The preliminary roads are laid at the top positions of both phases, and the excavation opening is reserved at the corresponding position of one of the phases;

[0011] Step 4: Lay the structural top plate near the top between the retaining walls on both sides, and reserve holes at the positions of the temporary column piles and excavation holes at the positions of the excavation openings;

[0012] Step 5: Use the cover-excavation reverse construction method to construct the subway station layer by layer from top to bottom;

[0013] Step 6: The top plate of the structure is sealed with a wall at the position corresponding to the excavation hole, and the first-phase position corresponding to the excavation hole is backfilled and the subsequent road is paved;

[0014] Step 7: Remove the early roads and temporary column piles, seal the holes on the top plate, backfill the first-phase positions corresponding to the holes and lay the later roads.

[0015] By adopting the above technical solution, after the retaining wall construction of the subway station is completed, the position between the retaining walls on both sides is the construction scope of the subway station, and the width direction of the construction scope is divided into two phases; then, temporary column piles are built between the two phases, so that the retaining wall and the temporary column piles are used as support to pave the preliminary road, and an excavation opening is reserved corresponding to the position of one of the phases, so that within a short period of time during the construction of the subway station, the traffic can be restored on the first phase without the excavation opening; then, the soil of the construction scope is excavated from the excavation opening, and the structural top plate is laid near the top between the retaining walls on both sides, and holes are reserved at the positions of the temporary column piles and excavation holes are reserved at the positions of the excavation opening, so that in the first phase with the reserved excavation opening, the column-free subway station is constructed layer by layer from top to bottom through the cover-excavation reverse method; in this process, during the long-term construction of the column-free subway station, traffic can still be opened, which can reduce the degree of traffic obstruction at the location of the subway station.

[0016] After completing the construction inside the subway station, the first-phase position corresponding to the excavation hole will be backfilled and the later road will be paved, so that the traffic position can be transferred to this phase position; then the previous road and temporary column piles will be demolished, and the later road will be paved at the original traffic position; so that during the construction of the column-free subway station, the top of the subway station can remain open to traffic as much as possible.

[0017] Preferably, between step 4 and step 5, the method further includes: constructing a longitudinal retaining wall between the structural top plate and the preliminary road and located on one side of the temporary column piles.

[0018] By adopting the above technical solution, in order to improve the supporting strength of the previous road, the temporary column piles are arranged more densely, but the arrangement of the temporary column piles will hinder the smoothness of the construction of the column-free subway station, thereby affecting the construction efficiency; therefore, after the construction of the structural top plate is completed, a longitudinal retaining wall is built between the structural top plate and the previous road and on one side of the temporary column piles, that is, the longitudinal retaining wall replaces the temporary column piles to support the previous road, so that the temporary column piles can be dismantled before the internal structure of the column-free subway station is constructed, freeing up more internal construction space for the column-free subway station.

[0019] Moreover, due to the provision of the longitudinal retaining wall, after the subsequent sealing treatment of the position corresponding to the soil excavation hole on the structural roof slab and during the backfilling process, it serves as a side retaining wall to maximize the backfilling range, thereby further increasing the range for laying the subsequent road at the first-phase position corresponding to the soil excavation hole and greatly improving the laying efficiency. If the longitudinal retaining wall is not provided, in order to ensure the road stability after laying the subsequent road, it is necessary to apply coercion to the side of the backfill soil away from the retaining wall, so there is a section where the subsequent road cannot be laid.

[0020] Preferably, the longitudinal retaining wall is provided on the side of the temporary column pile close to the soil excavation hole.

[0021] By adopting the above technical solution, not only is the construction convenience of the longitudinal retaining wall improved, but it is also closer to the soil excavation opening, facilitating maintenance.

[0022] Preferably, between the third step and the fourth step, it further includes: first-phase enclosures are provided on both sides of the first phase of the reserved soil excavation opening; between the sixth step and the seventh step, it further includes: second-phase enclosures are provided on both sides of the first phase where the subsequent road has not been laid.

[0023] By adopting the above technical solution, when constructing the first phase on the side where the soil excavation opening is set, the traffic safety of the previous road on the other first phase can be improved through the first-phase enclosures; in addition, after switching the traffic position, the traffic safety of the subsequent road on the first-phase position on the side where the soil excavation opening is set can be improved through the second-phase enclosures.

[0024] Preferably, the side of the first-phase enclosure close to the second-phase enclosure is on the side of the temporary column pile away from the soil excavation hole, and the side of the second-phase enclosure close to the first-phase enclosure is on the other side of the temporary column pile.

[0025] By adopting the above technical solution, when constructing the first phase on the side where the soil excavation opening is set, a section of the previous road can be vacated between the side of the first-phase enclosure close to the second-phase enclosure and the soil excavation opening, which can not only improve the traffic safety of the road but also allow construction personnel and construction tools such as cranes to pass through, improving the construction convenience; when constructing the other first phase, the traffic safety of the road and the construction convenience can be improved in the same way.

[0026] Preferably, between the second step and the third step, it further includes: building cross beams on the tops of the retaining walls on both sides and the tops of the temporary column piles, and building support beams between adjacent cross beams.

[0027] By adopting the above technical solution, since the retaining wall is made by splicing multiple precast walls, in order to improve the connection strength of the retaining wall, the integrity of the retaining wall is improved through the connection of the cross beams, and the force uniformity of the previous road can be improved; in addition, by setting the support beams, the support stability of the previous road can be further improved.

[0028] Preferably, the retaining wall includes a main body part and a temporary part which are detachably connected to each other. The main body part and the temporary part are arranged in sequence from bottom to top, and the horizontal height of the connection position between the main body part and the temporary part is higher than the horizontal height of the structural roof slab.

[0029] By adopting the above technical solution, during the long-term construction process, vehicles, construction equipment, etc. will continuously roll over the previous road, and thus will also cause long-term wear to the retaining wall for support. Therefore, by dividing the retaining wall into a main body part and a temporary part, and the two are detachably connected to each other, it is convenient to maintain the retaining wall; and since for a pillarless subway station, its overall strength is of utmost importance, the horizontal height of the connection position between the main body part and the temporary part is set at a height higher than the horizontal height of the structural roof slab, so as to maintain the overall strength of the pillarless subway station.

[0030] Preferably, between the fifth step and the sixth step, it further includes: removing the temporary part of the retaining wall on the side close to the soil outlet hole.

[0031] By adopting the above technical solution, since the main body part and the temporary part of the retaining wall are detachably connected, when backfilling is required, the temporary part is removed, so that backfilling can be carried out in a larger range later, and the paving range of the later road can be larger.

[0032] Preferably, a connection block is arranged on one side of the main body part close to the temporary part, and a connection groove for the connection block to be inserted into is arranged on one side of the temporary part close to the main body part; a connection screw is arranged at the position of the temporary part corresponding to the connection groove, the connection screw passes through the temporary part and the connection block at the same time, and connection nuts are threadedly installed at both ends of the connection screw.

[0033] By adopting the above technical solution, when the temporary part needs to be disassembled, first screw out the connection nut from the connection screw, and then take out the connection screw; thus, the disassembly between the main body part and the temporary part is completed, and then the removal of the temporary part is completed. This connection method not only has high connection stability but also is convenient for disassembly and assembly.

[0034] Preferably, a support rod is installed on one side of the temporary part close to the structural roof slab. One end of the support rod is hinged to the temporary part, and the other end abuts against the structural roof slab; a connection hole for the connection screw to pass through is provided on the support rod.

[0035] By adopting the above technical solution, after the main body part and the temporary part are connected through the connecting screw and the connecting nut, rotate the support rod to abut the support column against the structural roof slab, and at the same time make the connecting screw pass through the support rod. This can not only support the temporary part, but also lock the position of the connecting screw, further strengthening the stability between the main body part and the temporary part. And when it is necessary to remove the temporary part, after turning the support rod away from the connecting screw and making it vertically upward, it can act as a suspension rod to pull out the temporary part.

[0036] In summary, the present application includes at least one of the following beneficial technical effects:

[0037] 1. During the long-term construction of a column-free subway station, traffic can still pass through, which can reduce the traffic obstruction degree at the location of the subway station.

[0038] 2. After the construction inside the subway station is completed, first backfill the corresponding first-phase position of the excavation hole and lay the later-stage road, so that the traffic position can be transferred to this phase position. Then, demolish the previous road and the temporary column piles, and lay the later-stage road at the original traffic position, so that during the construction of this column-free subway station, the top of the subway station can be kept in a trafficable state as much as possible.

[0039] 3. After the construction of the structural roof slab is completed, build a longitudinal retaining wall at the position between the structural roof slab and the previous road and on one side of the temporary column pile, that is, use the longitudinal retaining wall to replace the temporary column pile to support the previous road, so that the temporary column pile can be demolished before the internal structure of the column-free subway station is constructed, creating more internal construction space for the column-free subway station.

[0040] 4. Due to the setting of the longitudinal retaining wall, during the subsequent backfilling process after sealing the wall at the position of the excavation hole corresponding to the structural roof slab, it serves as a side retaining wall to maximize the backfilling range, and further increases the range of laying the later-stage road at the corresponding first-phase position of the excavation hole, greatly improving the laying efficiency.

[0041] 5. It can not only improve the traffic safety of the road, but also allow construction personnel and construction tools such as cranes to pass through, improving the construction convenience.

[0042] 6. It can not only support the temporary part, but also lock the position of the connecting screw, further strengthening the stability between the main body part and the temporary part. And when it is necessary to remove the temporary part, after turning the support rod away from the connecting screw and making it vertically upward, it can act as a suspension rod to pull out the temporary part. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a construction schematic diagram of a column-free subway station according to an embodiment of the present application.

[0044] Figure 2 It is a schematic diagram of the backfilling of the construction section of a column - free subway station according to an embodiment of the present application.

[0045] Figure 3 It is a schematic diagram of the retaining wall structure of a column - free subway station according to an embodiment of the present application.

[0046] Figure 4 is Figure 3 The partial enlarged view of A in

[0047] Explanation of the reference numerals:

[0048] 1, retaining wall; 11, traffic section; 12, construction section; 13, cross beam; 14, support beam; 15, main body; 151, connecting block; 16, temporary part; 161, connecting groove; 162, connecting screw; 163, connecting nut; 164, support rod; 1641, connecting hole; 2, temporary column pile; 3, pre - construction road; 31, soil outlet; 4, structural roof; 41, hole; 42, soil extraction hole; 5, post - construction road; 6, longitudinal retaining wall; 7, first - phase enclosure; 8, second - phase enclosure. Detailed implementation manners

[0049] The following further describes the present application in detail Figures 1 - 4 in conjunction with the attached drawings.

[0050] An embodiment of the present application discloses a construction method for realizing rapid traffic lane change and removing temporary columns by using temporary piers.

[0051] In one embodiment, referring to Figure 1 and Figure 2 , the operation steps of the construction method are as follows:

[0052] S10: Construct the diaphragm wall to form the retaining walls 1 on both sides inside the subway station. Divide the width direction between the two retaining walls 1 into two phases, where one phase is the traffic section 11 and the other phase is the construction section 12, and the width of the traffic section 11 is smaller than the width of the construction section 12;

[0053] S20: Adopt the bored pile method to construct temporary column piles 2 at intervals in the length direction of the retaining wall 1 between the two phases as the temporary support for the road at the top of the first - phase traffic section 11;

[0054] S30: Lay the pre - construction road 3 at the top positions of both phases, and reserve a soil outlet 31 corresponding to one of the phases, where one of the phases here is the construction section 12; the soil outlet 31 is used to excavate the soil directly below the pre - construction road 3; during the construction of the construction section 12, vehicles can normally pass on the traffic section 11;

[0055] S40: Lay the structural roof slab 4 near the top between the retaining walls 1 on both sides, and reserve holes 41 corresponding to the positions of the temporary column piles 2 and an excavation hole 42 corresponding to the position of the excavation outlet 31; the structural roof slab 4 is the roof slab of the column-free subway station.

[0056] S50: Adopt the top-down and reverse construction method to construct the subway station layer by layer from top to bottom to complete the construction of the column-free subway station.

[0057] S60: Seal the wall at the position of the excavation hole 42 corresponding to the structural roof slab 4, backfill the first-phase position corresponding to the excavation hole 42 and lay the later road 5, so that the traffic position can be transferred to the later road 5 to keep the subway construction section in a trafficable state.

[0058] S70: Demolish the previous road 3 and the temporary column piles 2, seal the wall at the position of the hole 41 corresponding to the structural roof slab 4, backfill the first-phase position corresponding to the hole 41 and lay the later road 5.

[0059] In one embodiment, referring to Figure 1 and Figure 2 , between S40 and S50, the construction method further includes:

[0060] S41: Build a longitudinal retaining wall 6 between the structural roof slab 4 and the previous road 3 and on the side of the temporary column pile 2 close to the excavation hole 42.

[0061] Specifically, after completing the laying of the structural roof slab 4, build a longitudinal retaining wall 6 between the structural roof slab 4 and the previous road 3 and on the side of the temporary column pile 2 close to the excavation hole 42. The longitudinal retaining wall 6 extends along the length direction of the previous road 3, so as to support the previous road 3 instead of the temporary column pile 2; furthermore, the demolition of the temporary column pile 2 in the original S70 is advanced, making the subsequent construction of the column-free subway station under the traffic section 11 smoother; and it can be used as a retaining wall during the backfilling in the subsequent construction section 12.

[0062] In one embodiment, referring to Figure 1 and Figure 2 , between S30 and S40, the construction method further includes:

[0063] S31: There are first-phase enclosures 7 on both sides of the first phase of the reserved excavation outlet 31.

[0064] Specifically, after the preliminary road 3 is laid, on both sides of the first phase of the reserved soil outlet 31, that is, on both sides of the construction section 12, a first-phase enclosure 7 is provided. There is a distance between the side of the first-phase enclosure 7 close to the traffic section 11 and the edge of the soil outlet 31, and it is on the side of the temporary column pile 2 far from the soil outlet hole 42. Thus, not only can the purpose of protection be achieved, but also the construction equipment can be parked on the side close to the temporary column pile 2 for convenient construction. In addition, there is also a distance between the side of the first-phase enclosure 7 far from the traffic section 11 and the edge of the soil outlet 31.

[0065] In one embodiment, referring to Figure 2 , between S60 and S70, the construction method further includes:

[0066] S61: Second-phase enclosures 8 are provided on both sides of the first phase where the later-stage road 5 has not been laid.

[0067] Specifically, after the later-stage road 5 is laid on the construction section 12, second-phase enclosures 8 are provided on both sides of the first phase where the later-stage road 5 has not been laid, that is, on both sides of the traffic section 11. The side of the second-phase enclosure 8 close to the construction section 12 is on the side of the temporary column pile 2 close to the soil outlet hole 42 and directly above the longitudinal retaining wall 6, improving the traffic safety of the road and the construction convenience.

[0068] In one embodiment, referring to Figure 1 , between S20 and S30, the construction method further includes:

[0069] S21: Cross beams 13 are built on the tops of the two side retaining walls 1 and the temporary column piles 2, and support beams 14 are built between adjacent cross beams 13.

[0070] Specifically, after the construction of the retaining walls 1 and the temporary column piles 2 is completed, cross beams 13 are built on the tops of the two side retaining walls 1 and the temporary column piles 2, making the structures of the retaining walls 1 and the temporary column piles 2 more stable; multiple support beams 14 are built between adjacent cross beams 13, and the multiple support beams 14 are arranged at intervals in the length direction of the road, thereby improving the stability of the preliminary road 3.

[0071] In one embodiment, referring to Figure 2 , between S50 and S60, the construction method further includes:

[0072] S51: Remove the temporary part 16 of the retaining wall 1 on the side close to the soil outlet hole 42.

[0073] Specifically, the retaining wall 1 includes a main body portion 15 and a temporary portion 16. Both the main body portion 15 and the temporary portion 16 are vertically arranged, and the main body portion 15 and the temporary portion 16 are arranged in sequence from bottom to top. The main body portion 15 and the temporary portion 16 are detachably connected, and the horizontal height of the connection position between the main body portion 15 and the temporary portion 16 is higher than the horizontal height of the structural roof 4. Thus, when the construction of the column-free subway station is completed and before backfilling the construction section 12, the temporary portion 16 of the retaining wall 1 on the side close to the soil outlet hole 42 is first removed to provide a larger road paving space.

[0074] In addition, after S60, the temporary portion 16 of the retaining wall 1 on the corresponding side of the traffic section 11 also needs to be removed, which will not be elaborated here.

[0075] In an embodiment, referring to Figure 3 and Figure 4 , a connection block 151 is fixedly installed on the side of the main body portion 15 close to the temporary portion 16. A connection groove 161 is formed at the position of the temporary portion 16 close to the main body portion 15 and corresponding to the connection block 151. The connection block 151 is installed in the temporary portion 16 in a snap-fit manner through the connection groove 161. A connection screw 162 is provided at the position of each connection groove 161 of the temporary portion 16. The connection screw 162 extends in the horizontal direction and passes through both the temporary portion 16 and the connection block 151 at the same time. Connection nuts 163 are threadedly installed at both ends of the connection screw 162, and the connection nuts 163 abut against both sides of the temporary portion 16, thereby achieving the detachable connection between the main body portion 15 and the temporary portion 16.

[0076] A support rod 164 is installed on the side of the temporary portion 16 close to the structural roof 4. The support rod 164 extends downward obliquely away from the main body portion 15 from the temporary portion 16. One end of the support rod 164 is hinged to the temporary portion 16 and the other end abuts against the structural roof 4. A connection hole 1641 is formed at the position of the support rod 164 corresponding to the connection screw 162. The end of the connection screw 162 is snap-fitted in the connection hole 1641, and the connection screw 162 abuts against the wall of the snap-fitting hole. Thus, while supporting the temporary portion 16, a certain position locking can be achieved for the connection screw 162.

[0077] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A construction method for realizing rapid traffic side change and removing temporary columns by using temporary piers, characterized in that, The operation steps of the construction method are as follows: Step 1: Construct the diaphragm wall to form the retaining walls (1) on both sides inside the subway station, and divide the width direction between the two retaining walls (1) into two phases; Step 2: At intervals in the length direction of the retaining wall (1) at the position between the two phases, construct temporary column piles (2); Step 3: Lay the preliminary road (3) at the top positions of both phases, and reserve an excavation outlet (31) corresponding to one of the phases; Step 4: Lay the structural roof slab (4) at a position near the top between the two retaining walls (1), and reserve holes (41) corresponding to the positions of the temporary column piles (2) and an excavation hole (42) corresponding to the excavation outlet (31); Step 5: Adopt the top-down and reverse construction method to construct the subway station layer by layer; Step 6: Seal the wall at the position of the structural roof slab (4) corresponding to the excavation hole (42), backfill the position of the first phase corresponding to the excavation hole (42), and lay the later road (5); Step 7: Demolish the preliminary road (3) and the temporary column piles (2), seal the wall at the position of the structural roof slab (4) corresponding to the hole (41), backfill the position of the first phase corresponding to the hole (41), and lay the later road (5); Between Step 4 and Step 5, it further includes: construct a longitudinal retaining wall (6) between the structural roof slab (4) and the preliminary road (3) and at one side position of the temporary column pile (2); The longitudinal retaining wall (6) is arranged on the side of the temporary column pile (2) close to the excavation hole (42); The retaining wall (1) includes: a main body part (15) and a temporary part (16) which are detachably connected, the main body part (15) and the temporary part (16) are arranged in sequence from bottom to top, and the horizontal height of the connection position between the main body part (15) and the temporary part (16) is higher than the horizontal height of the structural roof slab (4); A connection block (151) is arranged on the side of the main body part (15) close to the temporary part (16), and a connection groove (161) for the connection block (151) to be inserted into is arranged on the side of the temporary part (16) close to the main body part (15); a connection screw (162) is arranged at the position of the temporary part (16) corresponding to the connection groove (161), the connection screw (162) passes through both the temporary part (16) and the connection block (151) at the same time, and connection nuts (163) are threadedly installed at both ends of the connection screw (162); A support rod (164) is installed on the side of the temporary part (16) close to the structural roof slab (4), one end of the support rod (164) is hinged to the temporary part (16), and the other end abuts against the structural roof slab (4); a connection hole (1641) for the connection screw (162) to pass through is provided on the support rod (164).

2. The construction method for realizing rapid traffic side change and removing temporary columns by using temporary piers according to claim 1, characterized in that, Between Step 3 and Step 4, it further includes: there are first-phase enclosures (7) on both sides of the first phase where the excavation outlet (31) is reserved; between Step 6 and Step 7, it further includes: there are second-phase enclosures (8) on both sides of the first phase where the later road (5) is not laid.

3. The construction method for realizing rapid traffic side change and removing temporary columns by using temporary piers according to claim 2, characterized in that, One side of the first-phase enclosure (7) close to the second-phase enclosure (8) is on the side of the temporary column piles (2) away from the soil excavation hole (42), and one side of the second-phase enclosure (8) close to the first-phase enclosure (7) is on the other side of the temporary column piles (2).

4. The construction method for realizing rapid traffic side change and removing temporary columns by using temporary piers according to claim 1, characterized in that, Between the second step and the third step, it further includes: constructing cross beams (13) on the tops of the retaining walls (1) on both sides and the tops of the temporary column piles (2), and constructing support beams (14) between two adjacent cross beams (13).

5. The construction method for realizing rapid traffic side change and removing temporary columns by using temporary piers according to claim 1, characterized in that, Between the fifth step and the sixth step, it further includes: removing the temporary part (16) of the retaining wall (1) on the side close to the soil excavation hole (42).

Images