CN108331605B - Prefabricated assembly method for tunnel exhaust duct - Google Patents
Prefabricated assembly method for tunnel exhaust duct Download PDFInfo
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- CN108331605B CN108331605B CN201711433049.6A CN201711433049A CN108331605B CN 108331605 B CN108331605 B CN 108331605B CN 201711433049 A CN201711433049 A CN 201711433049A CN 108331605 B CN108331605 B CN 108331605B
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- air duct
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- side wall
- cast
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000006835 compression Effects 0.000 claims abstract description 74
- 238000007906 compression Methods 0.000 claims abstract description 74
- 238000011065 in-situ storage Methods 0.000 claims abstract description 55
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 9
- 239000004575 stone Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 239000004568 cement Substances 0.000 claims description 5
- 238000009417 prefabrication Methods 0.000 claims description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 12
- 230000009193 crawling Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
- E21F1/06—Duct connections
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Duct Arrangements (AREA)
Abstract
The invention discloses a prefabricated assembly method for a tunnel exhaust duct, which is characterized in that prefabricated air duct bottom plates are erected on brackets on the side wall of a cast-in-situ air duct in a block mode, and operations such as filling fine stone concrete and compression bolts in notches between the brackets on the side wall of the cast-in-situ air duct bottom plates and the bottom plates are implemented along with the prefabricated air duct bottom plates in the block mode, so that the working intensity and difficulty can be obviously reduced, and the labor cost is saved. The invention has the advantages that: the operation of disassembling the template in the long and narrow air duct is avoided, the operation intensity and difficulty are obviously reduced, and the labor cost is saved; meets the 'green' construction requirement; the compression bolts and the connecting bolts can effectively prevent the vibration generated by the running of the vehicle and the influence of the air exhaust effect caused by the expansion of gaps among the prefabricated air duct plates and the air leakage due to the vibration of the installation fireproof plate such as the drilling of the top plate and the air duct bottom plate by adopting the anchor bolt setting operation and the like; the air duct bottom plate is easy to replace when damaged in accidents such as tunnel fires.
Description
Technical Field
The method is suitable for prefabricating and assembling the tunnel exhaust duct with the rectangular duct arranged on the top plate of the tunnel or the longitudinal long-distance underground structure.
Background
The underground loop built in the business district generally adopts the underground loop roof to set up the rectangle exhaust duct and is used for the loop to exhaust, and rectangle exhaust duct height commonly used is less, adopts cast-in-situ reinforced concrete structure to need demolish the inside template of wind channel, because the clearance height is little in the exhaust duct, the operation of crawling of the template personnel of long distance (its length is the movement joint interval, generally is not less than 25 m), operational environment is relatively poor, working strength is great, has put forward the demand to wind channel prefabrication installation from this.
Disclosure of Invention
The invention aims to provide a prefabricated assembly method for a tunnel exhaust duct, which can obviously reduce the working strength and difficulty of installation and save the labor cost.
In order to achieve the above object, the technical scheme of the present invention is as follows: a prefabricated assembly method of a tunnel exhaust duct is characterized by comprising the following steps of: the tunnel exhaust duct prefabrication and installation method comprises the following steps:
A. manufacturing a prefabricated air duct bottom plate, and dividing the air duct into a plurality of prefabricated air duct bottom plates with unit lengths along the length direction;
B. the cast-in-situ tunnel roof, the air duct side wall and the air duct side wall bracket positioned at the lower part of the air duct side wall are arranged and positioned at the position of the air duct side wall bracket before concrete is poured and poured;
C. sticking a rubber cushion layer of a bottom plate of the prefabricated air duct on brackets on the side wall of the air duct after the concrete reaches the strength;
D. erecting two ends of a prefabricated air duct bottom plate on bracket of the side wall of the air duct along the width direction, and reserving a cast-in-situ notch between the two ends of the prefabricated air duct bottom plate and the side wall of the air duct; the prefabricated air duct bottom plates are provided with a connecting gap from the upper end to the middle part of two sides in the length direction, the lower ends of the prefabricated air duct bottom plates are provided with hand hole gaps, joint reinforcing steel bars are reserved at the connecting gap, embedded parts are arranged at the hand hole gaps, the connecting gaps of two adjacent prefabricated air duct bottom plates are matched to form a connecting pouring area, the hand hole gaps of two adjacent prefabricated air duct bottom plates are matched to form hand holes, and the embedded parts of two adjacent prefabricated air duct bottom plates in the hand holes are provided with matched connecting bolt holes;
E. the compression bolt is sleeved into the compression bolt embedded pipe, and the connecting bolt is placed into a connecting bolt hole of the embedded steel plate in the hand hole and is coordinated to be screwed gradually;
F. a prefabricated air duct bottom plate is arranged in the connection pouring area and connected with longitudinal steel bars;
G. filling fine stone concrete into a cast-in-situ notch between the side wall of the air duct and the prefabricated air duct bottom plate and a connection pouring area between two adjacent prefabricated air duct bottom plates respectively, and doping an expanding agent;
H. after the tunnel air duct with a certain length section is installed, the gap between the bracket on the side wall of the cast-in-situ air duct and the bottom plate of the prefabricated air duct and the gap between the two adjacent bottom plates of the prefabricated air duct are filled with cement.
In the step E, a compression bolt elbow is arranged at the upper end of the compression bolt, a compression bolt clamping rod is arranged on the inner side of the compression bolt elbow, the compression bolt clamping rod and the compression bolt elbow are welded in a positioning mode at 90 degrees, the lower section of the compression bolt is inserted into the compression bolt embedded pipe, the upper section of the compression bolt is located in the cast-in-situ notch, after the compression bolt is screwed, the compression bolt clamping rod is located in the cast-in-situ notch, and the compression bolt elbow is exposed out of the cast-in-situ notch. The clamping rod of the compression bolt and the compression bolt elbow form a 90-degree right angle, so that the compression bolt elbow can be easily and effectively pressed against the prefabricated air duct bottom plate, and meanwhile, the screw rod which is used for tightening the nut outside the air duct and is used for clamping the clamping rod of the compression bolt cannot rotate along with the screwing of the nut.
Further, the root parts of the reserved joint reinforcing bars at the connecting gaps are embedded in the prefabricated air duct bottom plates, the end parts of the reserved joint reinforcing bars extend into the connecting gaps and are bent obliquely upwards after extending beyond the range of the embedded air duct bottom plates, the bent parts of the reserved joint reinforcing bars of two adjacent prefabricated air duct bottom plates are mutually staggered to form a U-shaped structure, and in the step F, the prefabricated air duct bottom plates are connected with longitudinal reinforcing bars and are arranged in the U-shaped structure.
Further, the bracket of the side wall of the cast-in-situ air duct is arranged below the side wall of the cast-in-situ air duct and extends towards the inner side of the side wall of the cast-in-situ air duct, the upper surface of the extension part forms an inclined plane with the high outer side and the low inner side, the rubber cushion layer of the bottom plate of the prefabricated air duct is adhered to the inner side of the inclined plane, and the bottoms of the two ends of the bottom plate of the prefabricated air duct are provided with inclined planes matched with the inclined plane.
Further, the hand hole notch is provided with an embedded part which is an embedded steel plate, connecting bolt holes and embedded steel bars extending into the prefabricated air duct bottom plates are arranged in the embedded steel plate, the embedded steel plates of the two adjacent prefabricated air duct bottom plates are connected through the prefabricated air duct bottom plate joint rubber pad, and connecting bolts are connected between the corresponding bolt holes of the embedded steel plates of the two adjacent prefabricated air duct bottom plates.
The prefabricated tunnel exhaust duct prefabricating method is characterized in that prefabricated air duct bottom plates are erected on brackets on the side walls of the cast-in-situ air duct without crawling a form removal plate (the length of each block is generally not more than 2 m), and fine stone concrete, compression bolts and other operations are filled in the notch between the brackets on the side walls of the cast-in-situ air duct bottom plates and the notches between the brackets on the side walls of the cast-in-situ air duct bottom plates and the prefabricated air duct bottom plates to be erected along with the prefabricated air duct bottom plates in a blocking manner, so that the working intensity and difficulty can be obviously reduced, the labor cost is saved, and meanwhile, the construction requirement of 'green' is met.
The advantages of the invention are as follows:
1. the operation of disassembling the template in the long and narrow air duct is avoided, the operation intensity and difficulty are obviously reduced, and the labor cost is saved;
2. meets the 'green' construction requirement;
3. the compression bolts and the connecting bolts can effectively prevent the vibration generated by the running of the vehicle and the influence of the air exhaust effect caused by the expansion of gaps among the prefabricated air duct plates and the air leakage due to the vibration of the installation fireproof plate such as the drilling of the top plate and the air duct bottom plate by adopting the anchor bolt setting operation and the like;
4. the air duct bottom plate is easy to replace when damaged in accidents such as tunnel fires.
Drawings
Fig. 1 is a tunnel cross-sectional view.
FIG. 2 is a plan view of a prefabricated air duct floor installation.
FIG. 3 is a cross-sectional view of the duct making installation.
FIG. 4 is a cross-sectional view of the side wall of the cast-in-place air duct.
FIG. 5 is a detail view of the installation of the bottom plate of the air duct and the cast-in-situ side wallDetailed view).
Fig. 6 is a detailed view of the hold-down bolt.
FIG. 7 is a detail view (section 1-1) of the longitudinal seam of the prefabricated air duct bottom plate.
FIG. 8 is a detail view of the prefabricated air duct bottom plate embedded partDetailed view).
In the figure, the component numbers are shown below:
the side wall of the cast-in-situ air duct;
1-1, cast-in-situ air duct side wall brackets;
2. prefabricating an air duct bottom plate;
the prefabricated air duct bottom plate support edge 2-1, the prefabricated air duct bottom plate joint notch 2-2, the reserved joint reinforcing steel bars 2-3, the mounting hand holes 2-4 bolts and the embedded parts 2-5; 2-6 cement filling, 2-7 connecting bolts, 2-8 prefabricated air duct bottom plate joint rubber pads, 2-9 prefabricated air duct bottom plate joint fine stone concrete filling and 2-10 prefabricated air duct bottom plate connecting longitudinal steel bars;
3. an air duct top plate;
4. filling with cement;
5. prefabricating an air duct bottom plate rubber cushion layer;
6. a compression bolt;
6-1 clamping rods of the compression bolts and elbows of the 6-2 compression bolts;
7. a pressing bolt is used for embedding a pipe;
8. fine stone concrete filling is carried out on the side wall of the air duct and the prefabricated bottom plate joint;
9. prefabricating a steel plate;
9-1 embedded part bolt holes and 9-2 embedded part anchoring steel bars;
10. and an air duct.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the prefabricated assembly structure of the tunnel exhaust duct shown in the figure comprises a cast-in-situ air duct side wall 1 and is characterized by further comprising
The cast-in-situ air duct side wall bracket 1-1 is arranged at the lower inner side of the cast-in-situ air duct side wall 1;
the prefabricated air duct base plates 2 are arranged on the cast-in-situ air duct side wall brackets 1-1 along the two ends of the width direction, and cast-in-situ notch is reserved between the two ends of the prefabricated air duct base plates 2 and the cast-in-situ air duct side wall 1; the prefabricated air duct bottom plates 2 are spliced in sequence along the length direction;
the compression bolt embedded pipe 7 is arranged in the bracket 1-1 on the side wall of the cast-in-situ air duct, and the compression bolt embedded pipe 7 is positioned below the cast-in-situ notch and close to the inner side;
the lower section of the compression bolt 6 is inserted into the compression bolt embedded pipe 7, the upper section of the compression bolt 6 is positioned in the cast-in-situ notch, the compression bolt elbow 6-2 is arranged at the upper end of the compression bolt 6, the compression bolt clamping rod 6-1 is arranged at the inner side of the compression bolt elbow 6-2, and the compression bolt clamping rod 6-1 and the compression bolt elbow 6-2 are subjected to 90-degree positioning welding;
the cast-in-situ connecting part is fine stone concrete filled in a cast-in-situ notch between two ends of the prefabricated air duct bottom plate and the side wall of the air duct, the upper section of the compression bolt and the clamping rod of the compression bolt are both positioned in the cast-in-situ connecting part, and the elbow of the compression bolt is positioned outside the cast-in-situ connecting part.
Further, a connection gap is formed from the upper ends to the middle parts of the two sides of the prefabricated air duct bottom plate 2 along the length direction, a hand hole gap is formed in the lower end of the prefabricated air duct bottom plate 2, joint steel bars 2-3 are reserved at the connection gap, prefabricated air duct bottom plate embedded parts 2-5 are arranged at the hand hole gap, the connection gap of two adjacent prefabricated air duct bottom plates 2 is matched to form a connection pouring area, hand holes are formed in the hand hole gap of two adjacent prefabricated air duct bottom plates 2 in a matched mode, connecting bolt holes are formed in the hand holes in the two adjacent prefabricated air duct bottom plate embedded parts 2-5, and connecting bolts 2-7 are connected between the matched connecting bolt holes.
Further, the root parts of the reserved joint reinforcing bars 2-3 at the connecting gaps are embedded in the prefabricated air duct bottom plates, the end parts of the reserved joint reinforcing bars extend into the connecting gaps and are bent obliquely upwards after extending beyond the range of the embedded air duct bottom plates 2, the bending parts of the reserved joint reinforcing bars 2-3 of two adjacent prefabricated air duct bottom plates 2 are mutually staggered to form a U-shaped structure, and the prefabricated air duct bottom plates are connected with longitudinal reinforcing bars and are arranged in the U-shaped structure.
Further, the cast-in-situ air duct side wall bracket 1-1 is arranged below the cast-in-situ air duct side wall 1 and extends towards the inner side of the cast-in-situ air duct side wall 1, an inclined plane with high outer side and low inner side is formed on the upper surface of the extending part, and the prefabricated air duct bottom plate rubber cushion layer 5 is adhered to the inner side of the inclined plane.
Further, the hand hole notch is provided with a prefabricated air duct bottom plate embedded part 2-5, according to a specific embodiment of the invention, the prefabricated air duct bottom plate embedded part is an embedded steel plate 9, connecting bolt holes and embedded steel bars extending into the prefabricated air duct bottom plate are arranged in the embedded steel plate 9, the embedded steel plates of two adjacent prefabricated air duct bottom plates are connected through a prefabricated air duct bottom plate joint rubber pad, and connecting bolts are connected between the corresponding bolt holes of the embedded steel plates of the two adjacent prefabricated air duct bottom plates.
The invention relates to a prefabrication and assembly method for a tunnel exhaust duct, which comprises the following implementation method steps:
A. manufacturing a prefabricated air duct bottom plate, and dividing the air duct into a plurality of prefabricated air duct bottom plates with unit lengths along the length direction;
B. the cast-in-situ tunnel roof, the air duct side wall and the air duct side wall bracket positioned at the lower part of the air duct side wall are arranged and positioned at the position of the air duct side wall bracket before concrete is poured and poured;
C. sticking a rubber cushion layer of a bottom plate of the prefabricated air duct on brackets on the side wall of the air duct after the concrete reaches the strength;
D. erecting two ends of a prefabricated air duct bottom plate on bracket of the side wall of the air duct along the width direction, and reserving a cast-in-situ notch between the two ends of the prefabricated air duct bottom plate and the side wall of the air duct; the prefabricated air duct bottom plates are provided with a connecting gap from the upper end to the middle part of two sides in the length direction, the lower ends of the prefabricated air duct bottom plates are provided with hand hole gaps, joint reinforcing steel bars are reserved at the connecting gap, embedded parts are arranged at the hand hole gaps, the connecting gaps of two adjacent prefabricated air duct bottom plates are matched to form a connecting pouring area, the hand hole gaps of two adjacent prefabricated air duct bottom plates are matched to form hand holes, and the embedded parts of two adjacent prefabricated air duct bottom plates in the hand holes are provided with matched connecting bolt holes;
E. the compression bolt is sleeved into the compression bolt embedded pipe, and the connecting bolt is placed into a connecting bolt hole of the embedded steel plate in the hand hole and is coordinated to be screwed gradually;
F. a prefabricated air duct bottom plate is arranged in the connection pouring area and connected with longitudinal steel bars;
G. filling fine stone concrete into a cast-in-situ notch between the side wall of the air duct and the prefabricated air duct bottom plate and a connection pouring area between two adjacent prefabricated air duct bottom plates respectively, and doping an expanding agent;
H. after the tunnel air duct with a certain length section is installed, the gap between the bracket on the side wall of the cast-in-situ air duct and the bottom plate of the prefabricated air duct and the gap between the two adjacent bottom plates of the prefabricated air duct are filled with cement.
In the step E, a compression bolt elbow is arranged at the upper end of the compression bolt, a compression bolt clamping rod is arranged on the inner side of the compression bolt elbow, the compression bolt clamping rod and the compression bolt elbow are welded in a positioning mode at 90 degrees, the lower section of the compression bolt is inserted into the compression bolt embedded pipe, the upper section of the compression bolt is located in the cast-in-situ notch, after the compression bolt is screwed, the compression bolt clamping rod is located in the cast-in-situ notch, and the compression bolt elbow is exposed out of the cast-in-situ notch. The clamping rod of the compression bolt and the compression bolt elbow form a 90-degree right angle, so that the compression bolt elbow can be easily and effectively pressed against the prefabricated air duct bottom plate, and meanwhile, the screw rod which is used for tightening the nut outside the air duct and is used for clamping the clamping rod of the compression bolt cannot rotate along with the screwing of the nut.
Further, the root parts of the reserved joint reinforcing bars 2-3 at the connecting gaps are embedded in the prefabricated air duct bottom plates, the end parts of the reserved joint reinforcing bars extend into the connecting gaps and are bent obliquely upwards after extending beyond the range of the embedded air duct bottom plates 2, the bending parts of the reserved joint reinforcing bars 2-3 of two adjacent prefabricated air duct bottom plates 2 are mutually staggered to form a U-shaped structure, and the prefabricated air duct bottom plates are connected with longitudinal reinforcing bars and are arranged in the U-shaped structure.
Further, the cast-in-situ air duct side wall bracket 1-1 is arranged below the cast-in-situ air duct side wall 1 and extends towards the inner side of the cast-in-situ air duct side wall 1, an inclined plane with high outer side and low inner side is formed on the upper surface of the extending part, and the prefabricated air duct bottom plate rubber cushion layer 5 is adhered to the inner side of the inclined plane.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. 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 devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (5)
1. A prefabricated assembly method of a tunnel exhaust duct is characterized by comprising the following steps of: the tunnel exhaust duct prefabrication and installation method comprises the following steps:
A. manufacturing a prefabricated air duct bottom plate, and dividing the air duct into a plurality of prefabricated air duct bottom plates with unit lengths along the length direction;
B. the cast-in-situ tunnel roof, the air duct side wall and the air duct side wall bracket positioned at the lower part of the air duct side wall are arranged and positioned at the position of the air duct side wall bracket before concrete is poured and poured;
C. sticking a rubber cushion layer of a bottom plate of the prefabricated air duct on brackets on the side wall of the air duct after the concrete reaches the strength;
D. erecting two ends of a prefabricated air duct bottom plate on bracket of the side wall of the air duct along the width direction, and reserving a cast-in-situ notch between the two ends of the prefabricated air duct bottom plate and the side wall of the air duct; the prefabricated air duct bottom plates are provided with a connecting gap from the upper end to the middle part of two sides in the length direction, the lower ends of the prefabricated air duct bottom plates are provided with hand hole gaps, joint reinforcing steel bars are reserved at the connecting gap, embedded parts are arranged at the hand hole gaps, the connecting gaps of two adjacent prefabricated air duct bottom plates are matched to form a connecting pouring area, the hand hole gaps of two adjacent prefabricated air duct bottom plates are matched to form hand holes, and the embedded parts of two adjacent prefabricated air duct bottom plates in the hand holes are provided with matched connecting bolt holes;
E. the compression bolt is sleeved into the compression bolt embedded pipe, and the connecting bolt is placed into a connecting bolt hole of the embedded steel plate in the hand hole and is coordinated to be screwed gradually;
F. a prefabricated air duct bottom plate is arranged in the connection pouring area and connected with longitudinal steel bars;
G. filling fine stone concrete into a cast-in-situ notch between the side wall of the air duct and the prefabricated air duct bottom plate and a connection pouring area between two adjacent prefabricated air duct bottom plates respectively, and doping an expanding agent;
H. after the tunnel air duct with a certain length section is installed, the gap between the bracket on the side wall of the cast-in-situ air duct and the bottom plate of the prefabricated air duct and the gap between the two adjacent bottom plates of the prefabricated air duct are filled with cement.
2. The prefabricated assembly method of the tunnel exhaust duct of claim 1, wherein in the step E, a compression bolt elbow is arranged at the upper end of the compression bolt, a compression bolt clamping rod is arranged at the inner side of the compression bolt elbow, the compression bolt clamping rod and the compression bolt elbow are subjected to 90-degree positioning welding, the lower section of the compression bolt is inserted into a compression bolt embedded pipe, the upper section of the compression bolt is positioned in a cast-in-situ notch, the compression bolt clamping rod is positioned in the cast-in-situ notch after being screwed, and the compression bolt elbow is exposed out of the cast-in-situ notch;
the clamping rod of the compression bolt and the compression bolt elbow form a 90-degree right angle, so that the compression bolt elbow can be easily and effectively pressed against the prefabricated air duct bottom plate, and meanwhile, the screw rod which is used for tightening the nut outside the air duct and is used for clamping the clamping rod of the compression bolt cannot rotate along with the screwing of the nut.
3. The method for prefabricating and assembling a tunnel exhaust duct according to claim 1, wherein the root parts of the reserved joint bars at the connecting gaps are pre-buried in the prefabricated duct bottom plates, the end parts of the reserved joint bars extend into the connecting gaps and are bent obliquely upwards after extending beyond the range of the pre-buried duct bottom plates, the bending parts of the reserved joint bars of two adjacent prefabricated duct bottom plates are mutually staggered to form a U-shaped structure, and in the step F, the connecting longitudinal bars of the prefabricated duct bottom plates are arranged in the U-shaped structure.
4. The prefabricated assembly method of the tunnel exhaust duct according to claim 1, wherein the bracket of the side wall of the cast-in-situ air duct is arranged below the side wall of the cast-in-situ air duct and extends towards the inner side of the side wall of the cast-in-situ air duct, the upper surface of the extension part forms an inclined plane with high outer side and low inner side, the rubber cushion layer of the bottom plate of the prefabricated air duct is adhered to the inner side of the inclined plane, and the bottoms of the two ends of the bottom plate of the prefabricated air duct are provided with inclined planes matched with the inclined plane.
5. The tunnel exhaust duct prefabrication assembly method according to claim 1, wherein the hand hole notch is provided with an embedded part which is an embedded steel plate, connecting bolt holes and embedded steel bars extending into the prefabricated air duct bottom plates are arranged in the embedded steel plate, the embedded steel plates of two adjacent prefabricated air duct bottom plates are connected through a prefabricated air duct bottom plate joint rubber pad, and connecting bolts are connected between corresponding bolt holes of the embedded steel plates of the two adjacent prefabricated air duct bottom plates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711433049.6A CN108331605B (en) | 2017-12-26 | 2017-12-26 | Prefabricated assembly method for tunnel exhaust duct |
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| CN201711433049.6A CN108331605B (en) | 2017-12-26 | 2017-12-26 | Prefabricated assembly method for tunnel exhaust duct |
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| CN108331605B true CN108331605B (en) | 2024-01-19 |
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| CN205369525U (en) * | 2016-01-21 | 2016-07-06 | 东南大学 | Local prestressing force assembled power consumption beam column node |
| CN106049704A (en) * | 2016-07-28 | 2016-10-26 | 杭州江润科技有限公司 | Prefabricated, cast-in-situ, combined type bare concrete exterior wall structure and construction method |
| CN106436758A (en) * | 2016-09-06 | 2017-02-22 | 沈阳建筑大学 | Precast fabricated concrete subway substation |
| CN207960659U (en) * | 2017-12-26 | 2018-10-12 | 上海市政工程设计研究总院（集团）有限公司 | A kind of tunnel exhausting duct precast assembly structure |
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