CN113502852A - Subway station cover excavation top-down construction structure and construction method thereof - Google Patents
Subway station cover excavation top-down construction structure and construction method thereof Download PDFInfo
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- CN113502852A CN113502852A CN202110766054.9A CN202110766054A CN113502852A CN 113502852 A CN113502852 A CN 113502852A CN 202110766054 A CN202110766054 A CN 202110766054A CN 113502852 A CN113502852 A CN 113502852A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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Abstract
The utility model relates to a subway station lid digs contrary structure of doing relates to underground building structure's technical field, including the floor, the floor setting is in the foundation ditch bottom, and the foundation ditch bottom is provided with pours the template, pours the template and is used for pouring cement mortar and form the floor, and the floor sets up along vertical direction interval in proper order, is provided with the pillar between the floor, and the pillar is used for supporting the floor. The present application has an effect of improving the safety of the process of constructing the floor.
Description
Technical Field
The application relates to the technical field of underground building structures, in particular to a subway station cover excavation top-down construction structure and a construction method thereof.
Background
The subway is a rail traffic form widely applied in modern municipal construction, occupies a small ground space, has an obvious shunting effect on ground traffic, and can reduce traffic pressure. In the construction process of the subway station, a deep pit needs to be dug on the ground, and a base body structure of the subway station needs to be built in the deep pit.
Related subway station construction usually requires digging a deep pit on the ground, and pouring concrete in the deep pit step by step from deep to shallow so as to form a multi-layer building structure in the deep pit. In the work progress, because need shift out a large amount of earth in the foundation ditch to the foundation ditch outside, constructor digs on one side of the foundation ditch usually and establishes the pit to set up the passageway in the pit, make during transport means such as truck can get into the foundation ditch through the passageway, make things convenient for constructor to adorn earth and transport on the truck.
The above prior art solutions have the following drawbacks: in the construction process of the subway station, risks exist in the floor pouring process, and due to the fact that the subway station is built from bottom to top, the floor suspended in the middle layer has the risk of breaking or collapsing after being poured and formed, and accidents are prone to being caused.
Disclosure of Invention
In order to improve the safety of the floor construction process, the application provides a subway station cover-excavation reverse construction structure and a construction method thereof.
The application provides a subway station covers digs contrary structure of doing adopts following technical scheme:
the utility model provides a subway station lid digs contrary structure of doing, includes the floor, and the floor setting is in the foundation ditch bottom, and the foundation ditch bottom is provided with pours the template, pours the template and is used for pouring cement mortar and form the floor, and the floor sets up along vertical direction interval in proper order, is provided with the pillar between the floor, and the pillar is used for supporting the floor.
Through adopting above-mentioned technical scheme, through setting up the floor in the foundation ditch bottom, make the foundation ditch bottom can play the supporting role to the floor, thereby make the floor pour the probability reduction that in-process fracture or collapse, constructor can continue to lay the floor in the foundation ditch bottom of new formation through digging out the earth that is located the floor below after the floor shaping, through setting up the pillar on the floor, make two adjacent floors in the vertical direction can pass through the pillar connection, and then promote the structural strength on upper floor, promote the security of building the floor process.
Optionally, a plurality of lattice columns are vertically buried in the foundation pit, one lattice column is arranged in one support column, and the lattice column is used for improving the structural strength of the support column.
Through adopting above-mentioned technical scheme, through vertically burying a plurality of lattice columns underground in the foundation ditch, constructor can follow lattice column length direction and set gradually the floor, and constructor can bury some of lattice column in cement mortar after pouring the floor to make the lattice column be arranged in pouring the pillar that forms, and then promote the structural strength of pillar, promote the support intensity of floor.
Optionally, a plurality of stressed main ribs are vertically arranged on the floor, the stressed main ribs are arranged around the latticed column, and the stressed main ribs are arranged in the supporting columns.
Through adopting above-mentioned technical scheme, through vertical a plurality of atress owner muscle that set up on the floor, make in the atress owner muscle can imbed the pillar, and then promote the structural strength of pillar.
Optionally, a scaffold is arranged at the bottom of the foundation pit, the scaffold is arranged between the bottom of the foundation pit and the pouring template, a space is formed between the bottom of the foundation pit and the pouring template through the scaffold, and the lower end of the stressed main rib is located in the space between the foundation pit and the pouring template.
Through adopting above-mentioned technical scheme, through set up the scaffold frame bottom the foundation ditch, set up on the scaffold frame and pour the template, make and pour template and foundation ditch bottom and pass through scaffold frame formation space, when the floor is pour the shaping after, the user of service can set up the mounting hole on the floor, make the mounting hole run through the floor, and then make the lower extreme of the atress owner muscle that inserts the floor can be arranged in pouring the space between template and the foundation ditch bottom, when constructor excavates the earth of floor below, along with earth reduces gradually, the lower extreme of atress owner muscle can expose, and then reduce the probability that earth buries the lower extreme of atress owner muscle, thereby reduce the main muscle lower extreme of excavating machinery striking atress, make the probability that atress owner muscle warp, can promote the structural strength of atress owner muscle.
Optionally, a cover plate is arranged above the floor on the upper layer and used for covering the foundation pit, the cover plate is flush with the ground, and the cover plate is supported on the floor through a support column.
Through adopting above-mentioned technical scheme, through set up the apron on the floor that is located the upper strata, make the apron can cover on the foundation ditch, and then make subaerial vehicle and pedestrian can play the effect that reduces ground construction area, reduces ground traffic pressure through the apron.
Optionally, a pit is formed in one side of the floor, the pit is communicated with the foundation pit, a permanent channel is arranged in the pit, and the permanent channel is used for enabling the transport tool to enter and exit the pit.
Through adopting above-mentioned technical scheme, offer the pit through one side on the floor, set up permanent passageway in the pit, constructor can go to the pit with transport tools such as truck through permanent passageway in, constructor can transport the earth that the excavation foundation ditch produced outside the pit through transport tool, makes things convenient for constructor to transport earth.
The construction method of the subway station cover excavation top-down structure adopts the following technical scheme:
a construction method of a subway station cover-excavation top-down structure comprises the following steps:
s1, vertically digging a pit on the ground and arranging a permanent channel in the pit;
s2, digging a foundation pit at one side of the permanent channel, wherein the depth of the foundation pit is less than that of the pit, and the foundation pit is communicated with the pit;
s3, tamping the bottom of the foundation pit by using a machine in the foundation pit to ensure that the bottom of the foundation pit is horizontal and flat;
s4, arranging a plurality of latticed columns on the lower bottom surface of the foundation pit, digging a plurality of connecting holes at the bottom of the foundation pit by constructors, vertically inserting the latticed columns into the connecting holes, exposing the upper ends of the latticed columns out of the connecting holes, and fixing the latticed columns in the connecting holes;
s5, arranging a pouring template at the bottom of the foundation pit, arranging cement mortar on the pouring template, and forming a horizontal floor after the cement mortar is solidified;
s6, drilling mounting holes on the floor, wherein a plurality of mounting holes are formed around one lattice column, a plurality of stressed main ribs are arranged around one lattice column, the stressed main ribs are inserted into the mounting holes, the stressed main ribs are vertically arranged, and the lower bottom end of each stressed main rib is positioned below the floor;
s7, pouring a pillar on the floor, arranging a cover plate on the pillar, embedding the lattice column and the stressed main rib into the pillar during pouring, and enabling the cover plate to play a role in plugging the foundation pit, so that pedestrians and vehicles can pass through the cover plate;
s8, reinforcing the cover plate, and pouring a wall body between the floor and the cover plate so as to improve the structural strength of the cover plate;
s9, entering the area under the floor through the permanent channel and excavating a foundation pit, and unloading and collecting a pouring template for pouring a floor layer in the process of excavating soil;
s10, tamping the bottom of the excavated foundation pit area, and arranging a pouring template at the bottom of the newly formed foundation pit;
s11, cement mortar is arranged in the pouring template to form a second floor, a mounting hole is formed in the second floor, stressed main ribs are inserted into the mounting hole, the stressed main ribs in the second floor are parallel to the stressed main ribs in the first floor, the stressed main ribs are in one-to-one correspondence with the stressed main ribs in the first floor, and the two stressed main ribs are connected with each other through sleeve connecting joints;
s12: and pouring a strut on the second floor, so that the second floor and the first floor are connected through the strut.
Through adopting above-mentioned technical scheme, through offering the pit subaerial earlier, set up permanent passageway in the pit, make things convenient for constructor to go to the pit with the transport means in, through offering the foundation ditch in pit one side, make the earth of excavating the foundation ditch in-process and can transport out through permanent passageway, through setting up the pouring template in the foundation ditch bottom, make the foundation ditch bottom play the supporting role to pouring the template, and then reduce the probability of pouring floor in-process floor fracture or collapse, promote the security of building floor process construction.
Optionally, in step S5, a scaffold is erected at the bottom of the foundation pit, a pouring template is disposed on one side of the scaffold away from the bottom of the foundation pit, and the scaffold supports the pouring template, so that a space is formed between the pouring template and the bottom of the foundation pit, and the lower end of the stressed main rib is located in the space between the pouring template and the bottom of the foundation pit.
Through adopting above-mentioned technical scheme, through setting up the scaffold frame bottom the foundation ditch, make the scaffold frame play and support the effect of pouring the template, form the space through the scaffold frame between pouring template and the foundation ditch bottom, through running through the floor with atress owner muscle, make the lower extreme of atress owner muscle can be arranged in the space between pouring template and the foundation ditch bottom, and then make atress owner muscle lower extreme and the earth contactless of foundation ditch bottom, after the floor shaping, when constructor excavates the earth of floor below, along with the reduction of earth, the lower extreme of atress owner muscle can expose, thereby reduce the probability that excavating machinery strikes atress owner muscle, atress owner muscle plays the effect of sign lattice column position, can reduce the probability that excavating machinery strikes lattice column.
To sum up, the beneficial technical effect of this application does:
1. the floor is arranged at the bottom of the foundation pit, so that the bottom of the foundation pit can support the floor, the probability of breakage or collapse in the floor pouring process is reduced, after the floor is formed, a constructor can continue to lay the floor at the bottom of the newly formed foundation pit by digging out soil below the floor, and two floors adjacent in the vertical direction can be connected through the support columns by arranging the support columns on the floor, so that the structural strength of the upper floor is improved, and the safety in the floor building process is improved;
2. the scaffold is arranged at the bottom of the foundation pit, the pouring template is arranged on the scaffold, so that the pouring template and the bottom of the foundation pit form a space through the scaffold, after the floor is poured and formed, a user can open a mounting hole in the floor, the mounting hole penetrates through the floor, and the lower end of a stressed main rib inserted into the floor can be located in the space between the pouring template and the bottom of the foundation pit;
3. through set up the scaffold frame bottom the foundation ditch, make the scaffold frame play and support the effect of pouring the template, form the space through the scaffold frame between pouring template and the foundation ditch bottom, through running through the floor with atress owner muscle, make the lower extreme of atress owner muscle can be arranged in the space between pouring template and the foundation ditch bottom, and then make the earth contactless of atress owner muscle lower extreme and foundation ditch bottom, after the floor shaping, when constructor excavates the earth of floor below, along with the reduction of earth, the lower extreme of atress owner muscle can expose, thereby reduce the probability that excavator striking atress owner muscle, atress owner muscle plays the effect of marking lattice column position, can reduce the probability that excavator striking machine struck lattice column.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is a schematic diagram of a positional relationship between a lattice column and a stressed main rib according to an embodiment of the present application.
Fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Reference numerals: 01. a pit; 02. a foundation pit; 1. a floor; 11. pouring a template; 12. a scaffold; 2. a pillar; 21. a lattice column; 22. a stressed main rib; 3. a cover plate; 4. a permanent channel.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses subway station lid digs contrary structure of doing, refers to 1, including floor 1, constructor digs subaerial and establishes pit 01, and pit 01 is vertical to be seted up. A permanent channel 4 is arranged in the pit 01, and the permanent channel 4 is used for enabling vehicles such as trucks and the like to enter the pit 01, so that soil dug in construction can be conveniently carried out through the vehicles.
Referring to fig. 1, a foundation pit 02 is dug on the ground, the foundation pit 02 is arranged on one side of a pit 01 in the horizontal direction, and the foundation pit 02 is communicated with the pit 01. Constructors vertically dig the foundation pit 02 downwards on the ground, and the soil dug in the process of digging the foundation pit 02 can be transported out through the permanent channel 4.
Referring to fig. 2 and 3, when the foundation pit 02 is dug to a depth less than the depth of the pit 01, excavation of the foundation pit 02 is stopped, and a constructor can tamp the bottom surface of the foundation pit 02 through an engineering machine, so that the bottom of the foundation pit 02 is horizontal and flat. A plurality of lattice columns 21 are buried in the foundation pit 02, a plurality of connecting holes are formed in the lower bottom surface of the foundation pit 02, one lattice column 21 is installed in one connecting hole, the lattice columns 21 are vertically arranged, and the length of each lattice column 21 is the same as the depth of the corresponding pit 01.
Referring to fig. 2 and 3, a floor 1 is provided in the foundation pit 02. Can dismantle in the foundation ditch 02 and be connected with a plurality of scaffolds 12, bottom under foundation ditch 02 is built to scaffold 12, is provided with a plurality of templates 11 of pouring on one side of keeping away from the foundation ditch 02 bottom on scaffold 12, pours template 11 and cuts apart through scaffold 12 bottom foundation ditch 02 to form the space. The constructor pours cement mortar on the pouring template 11, and forms the floor 1 after the cement mortar is solidified, thereby completing the construction work of the floor 1 of the underground first layer.
Referring to fig. 2 and 3, after the floor 1 is poured, a plurality of mounting holes are formed in the floor 1 by a constructor, a plurality of mounting holes are formed around one lattice column 21, and the mounting holes are through holes and penetrate through the floor 1. A plurality of stressed main ribs 22 are inserted into the floor 1 through mounting holes, the stressed main ribs 22 are vertically inserted into the floor 1 until the bottoms of the stressed main ribs 22 are near the scaffold 12, and the bottoms of the stressed main ribs 22 are higher than the bottoms of the scaffold 12, so that the bottoms of the stressed main ribs 22 can be located in a gap between the bottom of the foundation pit 02 and the pouring formwork 11. The force-bearing main rib 22 inserted into the floor 1 is fixed to the floor 1 by binding.
Referring to fig. 1 and 2, a plurality of pillars 2 are provided on a floor 1, and the pillars 2 are formed by pouring cement mortar. Constructor sets up the template on floor 1, makes the template around the main muscle 22 setting of atress near a lattice column 21 and lattice column 21, through pouring cement mortar in the template, makes cement mortar bury lattice column 21 and the main muscle 22 of atress, after cement mortar solidifies to form a plurality of pillars 2, pillar 2 is vertical to be set up on floor 1. By embedding the lattice columns 21 and the stressed main ribs 22 in the pillars 2, the structural strength of the pillars 2 is further improved.
Referring to fig. 1 and 2, a cover plate 3 is disposed on the top of the pillar 2, and the cover plate 3 is disposed horizontally and flush with the ground. The cover plate 3 is used to cover the foundation pit 02. Through set up apron 3 on pillar 2, make subaerial vehicle and pedestrian can pass through, and then reduce subaerial because dig and establish foundation ditch 02 and cause the probability of traffic jam. Constructor can pour the wall body through pouring on floor 1, pour cement mortar at pillar 2 and 3 junctions of apron, and then promote apron 3 and pillar 2's joint strength, promote the mechanical stability of apron 3.
Referring to fig. 2 and 3, a constructor can continue to excavate soil below the floor 1 through the pit 01, thereby increasing the depth of the foundation pit 02. The constructor digs the cavity under the floor 1 and then carries the soil out through the permanent channel 4. In the process of digging the cavity by a constructor, the pouring template 11 and the scaffold 12 below the floor 1 can be gradually exposed, and then the constructor can conveniently lift the pouring template 11 and the scaffold 12 off. In the excavation process of constructors, the stressed main rib 22 is located in a space supported by the scaffold 12, so that the lower end of the stressed main rib 22 is exposed out of the soil, the constructors can find the stressed main rib 22 conveniently, the probability that the excavating machinery impacts the stressed main rib 22 is reduced, and the probability that the structural strength of the stressed main rib 22 is reduced.
Referring to fig. 2 and 3, after a cavity is dug below the floor 1, a constructor tamps the bottom of a newly formed foundation pit 02, and sets up a scaffold 12 and a pouring template 11 at the bottom of the foundation pit 02, thereby constructing the floor 1 of the second underground layer. After the floor 1 is poured, a constructor sets a mounting hole on the floor 1, and inserts the stressed main rib 22 into the mounting hole. The main stress ribs 22 in the lower floor 1 are parallel to the main stress ribs 22 in the upper floor 1 and are in one-to-one correspondence with the positions of the main stress ribs 22 in the upper floor 1, and the main stress ribs 22 in the lower floor 1 and the main stress ribs 22 in the upper floor 1 are fixed with each other through sleeve connection joints.
Referring to fig. 2, a constructor sets a formwork on a lower floor 1 and pours a pillar 2, and the constructor buries a lattice column 21 and a stress main rib 22 with cement mortar, thereby improving the strength of the pillar 2 on the lower floor 1, and enabling the pillar 2 to support an upper floor 1. Constructors can gradually excavate the foundation pit 02 and gradually lay the floor 1 along the vertical direction, and in the process of laying the floor 1, the earth plays a supporting role for the floor 1, so that the probability that the floor 1 is broken or collapsed due to overlarge stress in the pouring operation process can be reduced, and the construction safety is improved.
The implementation principle of the embodiment of the application is as follows: the pit 01 is dug firstly, the permanent channel 4 is arranged on the pit 01, so that a transport tool can enter the pit 01 through the permanent channel 4, the soil dug in the process of digging the foundation pit 02 can be transported out through the transport tool, the working efficiency is improved, the scaffold 12 is arranged in the foundation pit 02, the pouring template 11 is arranged on the scaffold 12, the pouring template 11 and the bottom of the foundation pit 02 are separated into a space through the scaffold 12, after the floor 1 is arranged in the foundation pit 02 through pouring, a constructor can insert the bottom of the stressed main rib 22 into the space between the pouring template 11 and the bottom of the foundation pit 02, so that the probability that the constructor impacts the lower end of the stressed main rib 22 when digging the soil below the floor 1 is reduced, the pouring template 11 can be laid at the bottom of the foundation pit 02 through gradually digging the foundation pit 02, and the bottom of the foundation pit 02 plays a supporting role on the floor 1, the probability of major accidents caused by the breakage or the collapse of the floor 1 during construction can be reduced, and the construction safety is improved.
The embodiment of the application also discloses a construction method of the subway station cover excavation top-down structure. Referring to fig. 1, the method includes the following steps:
s1, vertically digging a pit 01 on the ground, building a permanent channel 4 in the pit 01, pouring the permanent channel 4 by cement mortar, arranging the permanent channel 4 in a hierarchy, and spirally upward extending the permanent channel 4 so as to facilitate the driving of trucks and other transportation tools, wherein the transportation tools are used for loading and transporting soil in different hierarchies;
s2, digging a foundation pit 02 on one side of the permanent channel 4, wherein the depth of the foundation pit 02 is smaller than that of the pit 01, and the foundation pit 02 is communicated with the pit 01;
s3, mechanically tamping the bottom of the foundation pit 02 to make the bottom of the foundation pit 02 horizontal and flat;
s4, arranging a plurality of latticed columns 21 on the lower bottom surface of the foundation pit 02, digging a plurality of connecting holes at the bottom of the foundation pit 02 by constructors, wherein the connecting holes are equidistantly spaced, the connecting holes are vertically arranged, the constructors vertically insert the latticed columns 21 into the connecting holes through tools such as cranes and the like, the upper ends of the latticed columns 21 are exposed out of the connecting holes, and the constructors can fix the latticed columns 21 in the connecting holes by arranging bolts at the bottoms of the connecting holes;
s51, erecting a scaffold 12 at the bottom of the foundation pit 02, arranging a plurality of pouring templates 11 on one side, far away from the bottom of the foundation pit 02, of the scaffold 12, and supporting the pouring templates 11 by the scaffold 12 so as to form a space between the pouring templates 11 and the bottom of the foundation pit 02;
s52, cement mortar is arranged on the pouring template 11, and a horizontal floor 1 is formed after the cement mortar is solidified;
s6, drilling mounting holes on the floor 1, wherein a plurality of mounting holes are formed around one lattice column 21, a plurality of stressed main reinforcements 22 are arranged around one lattice column 21, and the stressed main reinforcements 22 are inserted into the mounting holes, so that the stressed main reinforcements 22 are vertically arranged, and the lower bottom ends of the stressed main reinforcements are positioned in a space between the foundation pit 02 and the pouring template 11;
s7, pouring a support post 2 on the floor 1, arranging a cover plate 3 on the support post 2, and making the support post 2 play a role of supporting the cover plate 3 by pouring the support post 2, wherein the latticed column 21 and the stressed main rib 22 are both embedded in the support post 2 during pouring, and the cover plate 3 plays a role of plugging the foundation pit 02, so that pedestrians and vehicles can pass through the cover plate 3;
s8, reinforcing the cover plate 3, and pouring a wall body between the floor 1 and the cover plate 3 so as to improve the structural strength of the cover plate 3;
s9, entering the area below the floor 1 through the permanent channel 4, excavating a foundation pit 02, and unloading and collecting the scaffold 12 and the pouring template 11 for pouring the floor 1 in the process of excavating soil;
s10, tamping the bottom of the excavated foundation pit 02 area, arranging a scaffold 12 and a pouring template 11 at the bottom of the newly formed foundation pit 02;
s11, cement mortar is arranged in the pouring template 11 to form a second floor 1, mounting holes are formed in the second floor 1, stressed main ribs 22 are inserted in the mounting holes, the stressed main ribs 22 in the second floor 1 are parallel to the stressed main ribs 22 in the first floor 1 and correspond to the stressed main ribs 22 in the first floor 1 in position one by one, and the two stressed main ribs 22 are connected with each other through sleeve connecting joints;
s12: and pouring the pillars 2 on the second floor 1 to connect the second floor 1 with the first floor 1, gradually excavating soil below the first floor 1, and sequentially pouring the floors 1 and the pillars 2 in the bottom part area of the newly formed foundation pit 02 until the construction of the second floor 1 is completed.
The implementation principle of the embodiment of the application is as follows: the pit 01 is formed in the ground, the permanent channel 4 is arranged in the pit 01, the soil dug out by the excavation foundation pit 02 can be conveniently conveyed out by a constructor through a transport tool, the latticed column 21 is arranged in the foundation pit 02, the constructor can embed the latticed column 21 into cement mortar, the structural strength of the strut 2 is further improved, the pouring template 11 is arranged at the bottom of the foundation pit 02, the pouring template 11 can be supported at the bottom of the foundation pit 02, the probability of collapse of the pouring template 11 is reduced, the probability of major accidents caused by breakage or collapse of the floor 1 is reduced, the safety of the poured floor 1 is improved, the floor 1 is poured layer by layer, the soil which is not moved out of the foundation pit 02 in the pouring process of the floor 1 supports the poured floor 1 all the time, the structural strength of the floor 1 is further improved, and the construction safety is improved.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a subway station lid digs contrary structure of doing which characterized in that: including floor (1), floor (1) sets up in foundation ditch (02) bottom, and foundation ditch (02) bottom is provided with pours template (11), pours template (11) and is used for pouring cement mortar and form floor (1), and floor (1) sets up along vertical direction interval in proper order, is provided with between floor (1) pillar (2), and pillar (2) are used for supporting floor (1).
2. The subway station cover digging and reverse-working structure as claimed in claim 1, wherein: a plurality of lattice columns (21) are vertically buried in the foundation pit (02), one lattice column (21) is arranged in one support column (2), and the lattice column (21) is used for improving the structural strength of the support column (2).
3. The subway station cover digging and reverse-working structure as claimed in claim 2, wherein: a plurality of stressed main ribs (22) are vertically arranged on the floor (1), the stressed main ribs (22) are arranged around the lattice column (21), and the stressed main ribs (22) are arranged in the support columns (2).
4. The subway station cover digging and reverse-working structure as claimed in claim 3, wherein: the foundation pit supporting structure is characterized in that a scaffold (12) is arranged at the bottom of the foundation pit (02), the scaffold (12) is arranged between the bottom of the foundation pit (02) and the pouring template (11), a space is formed between the bottom of the foundation pit (02) and the pouring template (11) through the scaffold (12), and the lower end of a stress main rib (22) is located in the space between the foundation pit (02) and the pouring template (11).
5. The subway station cover digging and reverse-working structure as claimed in claim 4, wherein: be located the upper strata floor (1) top is provided with apron (3), and apron (3) are used for covering foundation ditch (02), and apron (3) and ground parallel and level, and apron (3) support on floor (1) through pillar (2).
6. The subway station cover digging and reverse-working structure as claimed in claim 5, wherein: a pit (01) is formed in one side of the floor (1), the pit (01) is communicated with a foundation pit (02), a permanent channel (4) is arranged in the pit (01), and the permanent channel (4) is used for enabling a transport tool to enter and exit the pit (01).
7. A construction method of a subway station cover excavation top-down structure according to claim 6, characterized in that: the method comprises the following steps:
s1, vertically digging a pit (01) on the ground and arranging a permanent channel (4) in the pit (01);
s2, digging a foundation pit (02) on one side of the permanent channel (4), wherein the depth of the foundation pit (02) is smaller than that of the pit (01), and the foundation pit (02) is communicated with the pit (01);
s3, tamping the bottom of the foundation pit (02) by using a machine in the foundation pit (02) to ensure that the bottom of the foundation pit (02) is horizontal and flat;
s4, arranging a plurality of latticed columns (21) on the lower bottom surface of the foundation pit (02), digging a plurality of connecting holes at the bottom of the foundation pit (02) by constructors, vertically inserting the latticed columns (21) into the connecting holes, exposing the upper ends of the latticed columns (21) out of the connecting holes, and fixing the latticed columns (21) in the connecting holes;
s5, arranging a pouring template (11) at the bottom of the foundation pit (02), arranging cement mortar on the pouring template (11), and forming a horizontal floor (1) after the cement mortar is solidified;
s6, drilling mounting holes on the floor (1), wherein a plurality of mounting holes are formed around one lattice column (21), a plurality of stressed main ribs (22) are arranged around one lattice column (21), the stressed main ribs (22) are inserted into the mounting holes, the stressed main ribs (22) are vertically arranged, and the lower bottom end of the stressed main ribs is positioned below the floor (1);
s7, pouring a support column (2) on a floor (1), arranging a cover plate (3) on the support column (2), burying a lattice column (21) and a stressed main rib (22) in the support column (2) during pouring, wherein the cover plate (3) has the effect of plugging a foundation pit (02) so that pedestrians and vehicles can pass through the cover plate (3);
s8, reinforcing the cover plate (3), and pouring a wall body between the floor (1) and the cover plate (3) so as to improve the structural strength of the cover plate (3);
s9, entering the area below the floor (1) through the permanent channel (4), excavating a foundation pit (02), and unloading and collecting a pouring template (11) for pouring the floor (1) on the upper layer in the process of excavating soil;
s10, tamping the bottom of the excavated foundation pit (02) area, and arranging a pouring template (11) at the bottom of the newly formed foundation pit (02);
s11, cement mortar is arranged in the pouring template (11) to form a second floor (1), a mounting hole is formed in the second floor (1), a stressed main rib (22) is inserted into the mounting hole, the stressed main rib (22) in the second floor (1) is parallel to the stressed main rib (22) in the first floor (1) and corresponds to the stressed main rib in the first floor (1), and the two stressed main ribs (22) are connected with each other through a sleeve connecting joint;
s12: and (3) pouring the support columns (2) on the second floor (1) to connect the second floor (1) and the first floor (1) through the support columns (2).
8. The construction method of the subway station cover excavation top-down structure as claimed in claim 7, wherein: in step S5, a scaffold (12) is erected at the bottom of the foundation pit (02), a pouring template (11) is arranged on one side, far away from the bottom of the foundation pit (02), of the scaffold (12), the scaffold (12) supports the pouring template (11), so that a space is formed between the pouring template (11) and the bottom of the foundation pit (02), and the lower end of the stressed main rib (22) is located in the space between the pouring template (11) and the bottom of the foundation pit (02).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006083610A (en) * | 2004-09-16 | 2006-03-30 | Shimizu Corp | Inverted construction method |
| CN105178356A (en) * | 2015-06-29 | 2015-12-23 | 上海建工四建集团有限公司 | Setting-up construction method for vertical joint bars of columns in reverse building method |
| CN109944250A (en) * | 2019-03-07 | 2019-06-28 | 上海建工集团股份有限公司 | The foundation pit of impermanent vertical support system is along inverse combining construction method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006083610A (en) * | 2004-09-16 | 2006-03-30 | Shimizu Corp | Inverted construction method |
| CN105178356A (en) * | 2015-06-29 | 2015-12-23 | 上海建工四建集团有限公司 | Setting-up construction method for vertical joint bars of columns in reverse building method |
| CN109944250A (en) * | 2019-03-07 | 2019-06-28 | 上海建工集团股份有限公司 | The foundation pit of impermanent vertical support system is along inverse combining construction method |
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