CN112922029A - Shaft-up and shaft-down channel for constructing ultra-deep shaft by reverse construction method and building method thereof - Google Patents
Shaft-up and shaft-down channel for constructing ultra-deep shaft by reverse construction method and building method thereof Download PDFInfo
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- CN112922029A CN112922029A CN202110292792.4A CN202110292792A CN112922029A CN 112922029 A CN112922029 A CN 112922029A CN 202110292792 A CN202110292792 A CN 202110292792A CN 112922029 A CN112922029 A CN 112922029A
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- 238000010276 construction Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000002441 reversible effect Effects 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 69
- 239000010959 steel Substances 0.000 claims description 69
- 239000000725 suspension Substances 0.000 claims description 29
- 230000002787 reinforcement Effects 0.000 claims description 20
- 210000000078 claw Anatomy 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 5
- 238000011900 installation process Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- 230000001174 ascending effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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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
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D7/00—Shaft equipment, e.g. timbering within the shaft
Abstract
The invention discloses an upper and lower shaft channel for constructing an ultra-deep shaft by a reverse construction method and a construction method thereof. The method for building the upper and lower shaft channels is built gradually along with the construction of the capping beam and the lining wall, the upper and lower shaft channels can be used in the construction process of the ultra-deep shaft, and the upper and lower shaft channels can also be used in the installation process of the subsequent shield machine during the lower shaft and the later shield construction process after the final construction is finished, so that a lot of convenience is provided for the whole project.
Description
Technical Field
The invention relates to the technical field of vertical shaft construction, in particular to an upper and lower shaft channel for constructing an ultra-deep vertical shaft by a reverse construction method and a building method thereof.
Background
In order to fully utilize underground space, in recent years, shield tunnel construction technology is increasingly applied to underground space of rivers, transoceans and cities, due to the fact that geological or construction sites are built on the upper portion, the shield tunnel line is buried deeper and deeper, a deeper starting working well and a deeper reaching working well are needed to ensure the starting tunneling and the reaching receiving of a shield machine, and therefore an ultra-deep working well needs to be constructed in advance for the line buried deeper.
In order to ensure the safety of the excavation of the ultra-deep working well, the construction is often carried out by adopting a reverse construction method, so that workers need to go up and down along the working well during construction every day, and the working well is not of a layered structure similar to a floor and does not have a stair, so that the workers are difficult to go up and down.
Therefore, in order to meet the requirement of ascending and descending workers during the construction of the ultra-deep working well, it is necessary to provide a shaft ascending and descending channel, and the shaft ascending and descending channel can meet the requirement of reverse construction, does not affect the construction and can ensure the safety of the workers in the process of ascending and descending.
Disclosure of Invention
The invention aims to provide an upper and lower shaft channel for constructing an ultra-deep vertical shaft by a reverse construction method and a construction method thereof, and solves the technical problem that in the prior art, an ultra-deep working shaft constructed by a reverse construction method is inconvenient for people to go up and down during construction.
To solve the above technical problem, a first aspect of the present invention is:
designing a reverse construction method for constructing an upper and lower shaft channel of an ultra-deep shaft, comprising:
the cantilever beam frame is arranged at the top of the ultra-deep shaft, a first connecting piece is embedded in a capping beam at the top of the ultra-deep shaft, the rear half part of the cantilever beam frame is lapped on the capping beam and is fixedly connected with the first connecting piece, and the front half part of the cantilever beam frame is suspended in the air;
the wall connecting bracket is arranged on the side surface of the inner lining wall of the ultra-deep shaft and comprises two rows of second connecting pieces which are embedded in the inner lining wall of the ultra-deep shaft at intervals along the vertical direction and two rows of vertical beams which are arranged along the inner lining wall of the ultra-deep shaft, the vertical beams are fixedly connected with the second connecting pieces, and a plurality of triangular supports are distributed on the vertical beams;
the box-type ladder cage is fixedly arranged on a triangular support of the wall connecting bracket, the box-type ladder cage at the top is fixedly connected with the first half part of the suspension girder frame, a detachable inclined ladder is connected to an outlet under the box-type ladder cage at the bottommost part, and the lower end of the inclined ladder extends to the inner bottom surface of the ultra-deep shaft.
Preferably, the first connecting piece comprises a first steel plate, a plurality of first reinforcing steel claw are welded on the lower side of the first steel plate, the first reinforcing steel claws are fixedly connected with a reinforcing cage in the capping beam, and the top surface of the first steel plate is flush with the surface of the capping beam; the second connecting piece comprises a second steel plate, a plurality of second steel bar claws are welded on the rear side of the second steel plate, the second steel bar claws are fixedly connected with a steel reinforcement cage in the inner lining wall, and the outer surface of the second steel plate is flush with the inner wall of the inner lining wall.
Preferably, two sides of the box-type ladder cage are respectively provided with at least two connecting plates at intervals, and the connecting plates are fixedly connected with the corresponding triangular supports.
Preferably, the suspension beam frame is a square steel frame formed by welding I-shaped steel, a third connecting piece is embedded in the inner side of the capping beam, and a first inclined support is arranged between the bottom of the front half part of the suspension beam frame and the third connecting piece.
Preferably, the top of the uppermost section of box-type ladder cage is provided with a box-type protective shed.
The second aspect of the present invention is:
the invention relates to a building method for constructing an upper shaft channel and a lower shaft channel of an ultra-deep shaft by a reverse construction method in the first aspect, which is characterized by comprising the following steps:
(1) the construction method comprises the following steps that in the construction process of the ultra-deep shaft by a reverse construction method, when a steel bar cage of a capping beam of the ultra-deep shaft is constructed, a first connecting piece is arranged on the steel bar cage of the capping beam and welded on the steel bar cage of the capping beam, then concrete of the capping beam is poured to embed the first connecting piece in the capping beam in advance, when the capping beam is completely solidified, the rear half part of a suspension beam frame is lapped on the capping beam and is fixedly connected with the first connecting piece, the front half part of the suspension beam frame is suspended in the air, and a top box type ladder cage is fixedly arranged on the front half part of the suspension beam frame;
(2) in the process of constructing a layer of lining wall at the bottom of the capping beam, a second connecting piece is pre-buried in the lining wall, the pre-buried second connecting piece is welded on a steel reinforcement cage in the lining wall, after concrete of the lining wall is finally solidified, a section of vertical steel beam is welded on the second connecting piece, a triangular support is welded on the outer side of the steel beam, box type ladder cages are arranged along the steel beam, the box type ladder cages are supported on the triangular support, the upper box type ladder cages and the lower box type ladder cages are communicated and connected, an inclined ladder is arranged at an outlet at the bottom of the box type ladder cage at the lowest part, and the lower end of the inclined ladder extends to the bottom surface of the inner space of the lining wall in the construction process;
(3) in the process of constructing each layer of lining wall of the ultra-deep shaft from top to bottom, a new box-type ladder cage is installed on the inner side of the current layer of lining wall according to the construction mode in the step (2), in the process of installing the box-type ladder cage on the inner side of the current layer of lining wall, the inclined ladder is firstly disassembled, and after the installation of the layer of box-type ladder cage is finished, the inclined ladder is installed at the bottom outlet of the lowest layer of box-type ladder cage; and when the construction of the whole ultra-deep vertical shaft is finished, all the box-type ladder cages are communicated up and down to form a shaft loading and unloading channel.
Preferably, in the step (1), a third connecting piece is embedded in the inner side of the capping beam, and a first inclined support is arranged between the bottom of the front half part of the suspension beam frame and the third connecting piece.
Preferably, in the step (2) and the step (3), at least two connecting plates are arranged on two sides of the box type ladder cage on the triangular support at intervals, and the connecting plates are fixedly connected with the corresponding triangular supports.
Preferably, in the step (1), a box-type protective shed is arranged above the box-type ladder cage at the top.
The invention has the main beneficial technical effects that:
1. the invention provides an upper and lower shaft passage for constructing an ultra-deep shaft by a reverse construction method, which comprises a cantilever beam frame arranged at the top of the ultra-deep shaft, a wall connecting bracket arranged on the side surface of a lining wall of the ultra-deep shaft and a plurality of box type ladder cages connected up and down, wherein the box type ladder cages are communicated up and down to form passages to and from the ground and the shaft bottom, so that the construction of the ultra-deep shaft is more convenient, the box type ladder cages are fixedly arranged on a triangular bracket of the wall connecting bracket, the top of the box type ladder cages is fixedly connected to the cantilever beam frame, and a first connecting piece, a second connecting piece and a third connecting piece are all embedded in concrete of the ultra-deep shaft and are fixedly connected with corresponding steel reinforcement cages in a concrete wall, so that the first connecting piece, the second connecting piece and the third connecting piece are integrated with the concrete wall, and the cantilever beam frame fixedly connected with the first connecting piece and the third connecting piece and the wall connecting bracket fixedly connected with, therefore, each box type ladder cage is very stable and safe, and the safety of the whole shaft going-up and down channel is guaranteed.
2. The method for constructing the shaft-up and shaft-down channel of the ultra-deep shaft by the reverse construction method is characterized in that the shaft-up and shaft-down channel is gradually constructed along with the construction of the capping beam and the lining wall, and the cantilever beam frame is constructed when the ultra-deep shaft is just constructed, so that the cantilever beam frame and the wall-connecting bracket are easier and safer to construct.
3. The method for constructing the shaft channel of the ultra-deep shaft by the reverse construction method of the embodiment is that wall connecting brackets are gradually constructed along with the construction of the lining wall from top to bottom layer by layer, and each section of wall connecting bracket is constructed, a plurality of box-type ladder cages are correspondingly arranged, the whole upper and lower shaft channels are prolonged along with the continuous deep excavation of the foundation pit in the middle part of the ultra-deep shaft, and the bottom of the lowest box-type ladder cage is provided with an inclined ladder, so that the channel for going up and down the well is always accompanied with the construction of the ultra-deep shaft, in the construction process of the ultra-deep vertical shaft, the shaft-up and shaft-down channels can directly supply constructors to go to and from the bottom surface and the shaft bottom, so that the construction is more convenient, after the final construction of the ultra-deep vertical shaft is finished, the whole upper and lower shaft channels extend from the ground to the bottom of the shaft, in the subsequent process of installing the shield machine in the shaft, and in the later stage shield construction process, this upper and lower well passageway can use always, provides a lot of facilities for whole engineering.
Drawings
Fig. 1 is a schematic side view of an embodiment of the invention for constructing an upper and lower shaft channels of an ultra-deep shaft by a reverse construction method in the building process.
Fig. 2 is a main view of an embodiment of the present invention for constructing an upper and lower shaft passage of an ultra-deep shaft by reverse construction.
Fig. 3 is an enlarged view of a portion a of fig. 1.
Fig. 4 is an enlarged view of a portion B of fig. 2.
Fig. 5 is a schematic perspective view of a first connecting member in an embodiment of the present invention for constructing an upper and lower shaft passage of an ultra-deep shaft by a reverse construction method.
Fig. 6 is an enlarged view of a portion C of fig. 1.
Fig. 7 is a schematic structural view of a wall connecting bracket provided on a side surface of a lining wall of an ultra-deep shaft in an embodiment of constructing an upper and lower shaft passage of the ultra-deep shaft by a reverse construction method of the present invention.
Fig. 8 is a schematic structural view of a box-type ladder cage arranged on a wall connecting bracket in an embodiment of the invention for constructing an upper and lower shaft passage of an ultra-deep shaft by a reverse construction method.
In the above figures, the reference numerals are to indicate: the device comprises a suspension girder frame 1, a cross girder 11, a vertical girder 12, a triangular steel plate 13, a first inclined support 14, an inner lining wall 2, a capping beam 21, a first connecting piece 22, a first steel plate 221, a first steel bar claw 222, a third connecting piece 23, a second connecting piece 24, a top box type ladder cage 3, a wall connecting bracket 4, a vertical girder 41, an upper girder 42, an inclined girder 43, a connecting plate 44, a box type protective shed 5 and an inclined ladder 6.
Detailed Description
The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. References to "first," "second," etc. in this application are intended to distinguish between similar items and not necessarily to describe a particular order or sequence.
A reverse construction method is used for constructing an upper shaft channel and a lower shaft channel of an ultra-deep shaft.
The ultra-deep shaft is a foundation pit excavated in a construction site, and can be in a surrounding circumferential shape or a square shape, a concrete retaining wall is constructed around the foundation pit, the ultra-deep shaft can be used for hoisting a shield machine to the underground when the shield machine starts, or hoisting the shield machine out after the shield machine finishes construction, an upper shaft channel and a lower shaft channel in the embodiment are built on the inner wall of the concrete retaining wall, so that a constructor on the ground can reach the underground operation along the upper shaft channel and the lower shaft channel, or reach the ground from the underground, as shown in fig. 1, the concrete retaining wall comprises an inner lining wall 2 and a circle of capping beams 21 positioned at the top of the inner lining wall 2, the reverse construction of the ultra-deep shaft is gradually constructed from top to bottom, the capping beams 21 are constructed by pile tops after pile driving, and then the inner lining wall 2 is constructed to the next layer while excavating the foundation pit until the designed depth of the ultra-deep shaft is constructed.
As shown in fig. 1, the upper and lower shaft passages of the ultra-deep shaft constructed by the reverse construction method comprise a cantilever beam frame 1 arranged at the top of the ultra-deep shaft, as shown in fig. 3 and 4, the cantilever beam frame 1 is a square steel frame welded by i-beams, the cantilever beam frame 1 comprises two groups of cross beams 11 positioned at the left side and the right side, each group of cross beams 11 comprises an upper cross beam and a lower cross beam, two vertical beams 12 are arranged at the rear parts of the upper and lower cross beams 11 at the same side, two groups of longitudinal beams which are totally arranged are connected between the rear parts of the cross beams at the two sides, the cross beams, the vertical beams and the longitudinal beams all adopt i-beams, and triangular steel plates 13 are respectively arranged between the included.
Four first connecting pieces 22 are embedded in the capping beam 21 at the top of the ultra-deep shaft, as shown in fig. 5, each first connecting piece 22 comprises a first steel plate 221, six first reinforcement claws 222 are welded to the lower side of each first steel plate 221, and when the first connecting pieces 22 are machined, 6 small holes are cut in the first steel plates 221, and the upper ends of the first reinforcement claws 222 penetrate through the small holes to be welded with the first steel plates 221. When the reinforcement cage of capping beam 21 is banded, the reinforcement cage in first reinforcement claw 222 and capping beam 21 is fixedly connected through welding or banding, and fix a position first connecting piece, make first steel sheet 221 top surface and capping beam 21 top surface parallel and level after pouring, first reinforcement claw 222 bottom bending part is for making things convenient for welding or banding.
When the concrete strength of the capping beam 21 meets the requirement, finding out the first steel plate 221 on the top surface of the capping beam 21, welding the cross beam 11 of the suspension beam frame 1 on the top surface of the capping beam 21 by using 20I-steel according to the size requirement of the suspension beam frame 1 and the position of the first steel plate 221 to form a reinforcing rib, welding a triangular plate between the cross beam 11 and the first steel plate 221 to form a reinforcing rib, and then welding other parts of the suspension beam frame 1 according to the structure of the suspension beam frame 1, so that the rear half part of the suspension beam frame 21 is lapped on the capping beam 21 and is fixedly connected with the first connecting piece 22.
As shown in fig. 3, the front half of the cross beam 11 is suspended, so that the front half of the whole suspension beam frame 1 is suspended at the top of the ultra-deep shaft, the suspended part is used for connecting a box-type ladder cage 3 at the top of an upper and lower shaft channel, the box-type ladder cage 3 at the top is welded with the suspension beam frame 1, in addition, a third connecting piece 23 is embedded inside the capping beam 21, the structure of the third connecting piece 23 is the same as that of the first connecting piece 22, the third connecting piece 23 is fixedly connected with a reinforcement cage in the suspension beam frame 1, a first inclined support 14 is arranged between the bottom of the front half of the suspension beam frame 1 and the third connecting piece 23, and the first inclined support 14 is made of i-steel and plays a role in reinforcing and supporting the suspension beam frame 1.
As shown in fig. 7, the wall connecting bracket 4 is provided on the side of the inner lining wall 2 of the ultra-deep shaft, the wall connecting bracket 4 shown in fig. 7 is the wall connecting bracket after the whole shaft passage is constructed, and in the actual construction, the wall connecting bracket 4 is constructed along with the inner lining wall 2 section by section. As shown in fig. 6, the wall connecting bracket 4 includes two rows of vertical beams 41 arranged along the inner lining wall 2 of the ultra-deep shaft, the vertical beams 41 are respectively disposed at two side positions of the box-type ladder cage, two rows of second connecting members 24 are embedded at intervals in the inner lining wall of the ultra-deep shaft along the vertical direction, the vertical beams 41 are fixedly connected with the second connecting members 24, the second connecting members 24 have the same structure as the first connecting members 22 and include second steel plates, the rear sides of the second steel plates are welded with six second steel claw, in the embedding process, the second steel claw is welded with the steel cage in the inner lining wall, the outer surfaces of the second steel plates are flush with the inner wall of the inner lining wall 2, and the vertical beams 41 are welded on the second steel plates.
Referring to fig. 7, a plurality of triangular supports are arranged on the vertical beam 41 at intervals from top to bottom, as shown in fig. 8, a plurality of box-type ladder cages connected from top to bottom are arranged along the wall connecting bracket 4 from top to bottom, the box-type ladder cages are installed along with the construction of the wall connecting bracket 4 until the construction of the whole ultra-deep shaft is completed, as shown in fig. 6, the box-type ladder cages are fixedly arranged on the triangular supports of the wall connecting bracket 4, each two adjacent box-type ladder cages are correspondingly supported by one triangular support, two connecting plates 44 are arranged at intervals on two sides of the box-type ladder cage corresponding to the positions of the triangular supports, the connecting plates 44 are fixedly connected with the triangular supports, the triangular supports are made of i-steel and comprise an upper beam 42 and an oblique beam 43, and the connecting plates 44 are supported on the upper beam 42 and are welded and fastened.
As shown in fig. 1 and 2, a box-type protective shed 5 is arranged at the top of the top box-type ladder cage 3, the ladder steps 31 in the top box-type ladder cage 3 can reach the box-type protective shed 5, and the box-type protective shed 5 is provided with an entrance and an exit facing the outer side of the capping beam 21 so as to be convenient for entering the shaft passage, and the ladder steps in the box-type ladder cages below the top box-type ladder cage 3 are arranged in a staggered manner, so that a plurality of layers of turning ladder steps for walking up and down are formed in the whole shaft passage.
As shown in fig. 1 and 2, a detachable inclined ladder 6 is connected to an outlet under the lowest box-type ladder cage, the lower end of the inclined ladder 6 extends to the inner bottom surface of the ultra-deep shaft, in the construction process of the lining wall 2, after the box-type ladder cage on the lining wall of the constructed layer is installed, the lining wall of the next layer is conveniently constructed in the shaft, when the box-type ladder cage on the inner side of the lining wall of the next layer is installed, the inclined ladder 6 is temporarily detached, the circulation is continuously carried out, the inclined ladder 6 is designed to be detachable, the descending of constructors is not delayed, and meanwhile, the installation of the box-type ladder cage is not hindered.
Example 2:
a building method of an upper and lower shaft channel of an ultra-deep shaft constructed by a reverse construction method is used for building the upper and lower shaft channel of the ultra-deep shaft constructed by the reverse construction method in embodiment 1, and specifically comprises the following steps:
(1) in the extra-deep shaft adopted reverse construction method work progress, when executing the steel reinforcement cage of the capping beam of doing the extra-deep shaft, set up first connecting piece on the steel reinforcement cage of capping beam, first connecting piece welding is on the steel reinforcement cage of capping beam, later pour the concrete of capping beam with first connecting piece pre-buried in the capping beam, solidify completely when the capping beam, take the latter half of suspension beam frame on the capping beam and with first connecting piece fixed connection, suspension beam frame first half is unsettled, at the fixed box ladder cage in top that sets up of suspension beam frame first half.
In this step, at the pre-buried third connecting piece of capping beam inboard, be equipped with first bearing diagonal between the first half bottom of suspension frame and third connecting piece, consolidate the suspension frame to set up box protection canopy in the top of the box ladder cage at top, make things convenient for personnel to come in and go out safely.
The method for constructing the shaft access channel of the ultra-deep vertical shaft by the reverse construction method is characterized in that the shaft access channel is gradually constructed along with the construction of the capping beam and the lining wall, and the cantilever beam frame is constructed when the ultra-deep vertical shaft is just constructed, so that the cantilever beam frame is easier and safer to construct.
(2) In the process of constructing a layer of lining wall at the bottom of a capping beam, a second connecting piece is pre-buried in the lining wall, the pre-buried second connecting piece is welded on a steel reinforcement cage in the lining wall, after concrete of the lining wall is finally solidified, a section of vertical steel beam is welded on the second connecting piece, a triangular support is welded on the outer side of the steel beam, box type ladder cages are arranged along the steel beam, the box type ladder cages are supported on the triangular support, the upper adjacent box type ladder cages and the lower adjacent box type ladder cages are communicated and connected, an inclined ladder is arranged at an outlet at the bottom of the box type ladder cage at the lowest position, and the lower end of the inclined ladder extends to the bottom surface of the inner space of the lining wall in the construction process.
In the step, a section of vertical steel beam is finally spliced into a vertical beam in the wall connecting bracket, two connecting plates are arranged at two sides of the box type ladder cage on the triangular support at intervals in the process of installing the box type ladder cage, and the connecting plates are fixedly connected with the corresponding triangular supports.
(3) In the process of constructing each layer of lining wall of the ultra-deep shaft from top to bottom, a new box-type ladder cage is installed on the inner side of the current layer of lining wall according to the construction mode in the step (2), in the process of installing the box-type ladder cage on the inner side of the current layer of lining wall, the inclined ladder is firstly disassembled until the installation of the layer of box-type ladder cage is finished, and then the inclined ladder is installed at the bottom outlet of the lowest layer of box-type ladder cage; and when the construction of the whole ultra-deep vertical shaft is finished, all the box-type ladder cages are communicated up and down to form a shaft loading and unloading channel.
Along with interior welt from top to bottom is under construction layer by layer, progressively execute and do and link the wall bracket, and every execution does one section and links the wall bracket, correspond several box ladder cages of installation, make whole upper and lower shaft passageway along with the continuous deep digging of ultradeep shaft middle part foundation ditch and prolong, and install the inclined ladder bottom box ladder cage of below, thus, the upper and lower shaft passageway is along with the construction of ultradeep shaft all the time, in ultradeep shaft work progress, upper and lower shaft passageway can always supply constructor to come and go bottom surface and shaft bottom, make the construction more convenient. And after the final construction of the ultra-deep shaft is finished, the whole shaft going up and down channel extends to the shaft bottom from the ground, and the shaft going up and down channel can be used all the time in the following installation process of the shield machine going down the shaft and the later shield construction process, so that a lot of convenience is provided for the whole project.
Because first connecting piece, second connecting piece and third connecting piece are all pre-buried in the concrete of ultra-deep shaft, and with corresponding steel reinforcement cage fixed connection in the concrete wall, consequently, make first connecting piece, second connecting piece and third connecting piece become whole with the concrete wall, like this, with first connecting piece and third connecting piece fixed connection's cantilever beam frame to and with the firm very of second connecting piece fixed connection's wall bracket, make the safety of whole upper and lower well passageway obtain the guarantee.
While the invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes in the details of the embodiments and various changes in the details of construction and materials may be made therein without departing from the spirit of the invention and without departing from the scope of the invention.
Claims (9)
1. An upper and lower shaft passage of an ultra-deep shaft constructed by a reverse construction method, comprising:
the cantilever beam frame is arranged at the top of the ultra-deep shaft, a first connecting piece is embedded in a capping beam at the top of the ultra-deep shaft, the rear half part of the cantilever beam frame is lapped on the capping beam and is fixedly connected with the first connecting piece, and the front half part of the cantilever beam frame is suspended in the air;
the wall connecting bracket is arranged on the side surface of the inner lining wall of the ultra-deep shaft and comprises two rows of second connecting pieces which are embedded in the inner lining wall of the ultra-deep shaft at intervals along the vertical direction and two rows of vertical beams which are arranged along the inner lining wall of the ultra-deep shaft, the vertical beams are fixedly connected with the second connecting pieces, and a plurality of triangular supports are distributed on the vertical beams;
the box-type ladder cage is fixedly arranged on a triangular support of the wall connecting bracket, the box-type ladder cage at the top is fixedly connected with the first half part of the suspension girder frame, a detachable inclined ladder is connected to an outlet under the box-type ladder cage at the bottommost part, and the lower end of the inclined ladder extends to the inner bottom surface of the ultra-deep shaft.
2. The reverse construction method of claim 1, wherein the first connecting member comprises a first steel plate, a plurality of first reinforcement claws are welded to the lower side of the first steel plate, the first reinforcement claws are fixedly connected with reinforcement cages in the capping beam, and the top surface of the first steel plate is flush with the surface of the capping beam; the second connecting piece comprises a second steel plate, a plurality of second steel bar claws are welded on the rear side of the second steel plate, the second steel bar claws are fixedly connected with a steel reinforcement cage in the inner lining wall, and the outer surface of the second steel plate is flush with the inner wall of the inner lining wall.
3. The topdown access shaft of claim 1, wherein at least two connecting plates are spaced apart from each other on both sides of the box-type ladder cage, and the connecting plates are fixedly connected to the corresponding triangular brackets.
4. The shaft channel of claim 1, wherein the suspension girder frame is a square steel frame welded by i-shaped steel, a third connecting member is embedded inside the capping beam, and a first inclined support is provided between the bottom of the front half part of the suspension girder frame and the third connecting member.
5. The top-down shaft access of the reverse construction method of an ultra-deep shaft of claim 1, wherein a box type protection shed is provided on the top of the uppermost box type ladder cage.
6. The method for constructing the shaft passage for the super-deep shaft by the reverse construction method of any one of claims 1 to 5, which is characterized by comprising the following steps:
(1) the construction method comprises the following steps that in the construction process of the ultra-deep shaft by a reverse construction method, when a steel bar cage of a capping beam of the ultra-deep shaft is constructed, a first connecting piece is arranged on the steel bar cage of the capping beam and welded on the steel bar cage of the capping beam, then concrete of the capping beam is poured to embed the first connecting piece in the capping beam in advance, when the capping beam is completely solidified, the rear half part of a suspension beam frame is lapped on the capping beam and is fixedly connected with the first connecting piece, the front half part of the suspension beam frame is suspended in the air, and a top box type ladder cage is fixedly arranged on the front half part of the suspension beam frame;
(2) in the process of constructing a layer of lining wall at the bottom of the capping beam, a second connecting piece is pre-buried in the lining wall, the pre-buried second connecting piece is welded on a steel reinforcement cage in the lining wall, after concrete of the lining wall is finally solidified, a section of vertical steel beam is welded on the second connecting piece, a triangular support is welded on the outer side of the steel beam, box type ladder cages are arranged along the steel beam, the box type ladder cages are supported on the triangular support, the upper box type ladder cages and the lower box type ladder cages are communicated and connected, an inclined ladder is arranged at an outlet at the bottom of the box type ladder cage at the lowest part, and the lower end of the inclined ladder extends to the bottom surface of the inner space of the lining wall in the construction process;
(3) in the process of constructing each layer of lining wall of the ultra-deep shaft from top to bottom, a new box-type ladder cage is installed on the inner side of the current layer of lining wall according to the construction mode in the step (2), in the process of installing the box-type ladder cage on the inner side of the current layer of lining wall, the inclined ladder is firstly disassembled, and after the installation of the layer of box-type ladder cage is finished, the inclined ladder is installed at the bottom outlet of the lowest layer of box-type ladder cage; and when the construction of the whole ultra-deep vertical shaft is finished, all the box-type ladder cages are communicated up and down to form a shaft loading and unloading channel.
7. The method for constructing an upper and lower shaft passage of an ultra-deep shaft according to claim 6, wherein in the step (1), a third connecting member is embedded inside the capping beam, and a first diagonal brace is provided between the bottom of the front half part of the cantilever frame and the third connecting member.
8. The method for building a shaft passage for an ultra-deep shaft by reverse construction according to claim 6, wherein in the step (2) and the step (3), at least two connecting plates are arranged on two sides of the box type ladder cage arranged on the triangular supports at intervals, and the connecting plates are fixedly connected with the corresponding triangular supports.
9. The method for constructing an upper and lower shaft passage of an ultra-deep shaft according to claim 6, wherein in the step (1), a box type protection shed is provided above the box type ladder cage at the top.
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