CN214787495U - Press-in type ventilation structure of parallel three-hole tunnel - Google Patents
Press-in type ventilation structure of parallel three-hole tunnel Download PDFInfo
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- CN214787495U CN214787495U CN202120376201.7U CN202120376201U CN214787495U CN 214787495 U CN214787495 U CN 214787495U CN 202120376201 U CN202120376201 U CN 202120376201U CN 214787495 U CN214787495 U CN 214787495U
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Abstract
The utility model discloses a structure that parallel three hole method tunnel forced ventilates, including parallel three parallel tunnels, three parallel tunnels are parallel pilot hole, the positive hole of left side line and the positive hole of right side line respectively, and the positive hole of left side line and the positive hole of right side line are located parallel pilot hole both sides respectively, are provided with the cross passage for the intercommunication between the adjacent tunnel. And the parallel middle pilot tunnel adopts a TBM method to carry out forward main tunnel construction, and the excavation working faces of the left main tunnel and the right main tunnel are increased through the transverse channel to assist the construction of the left main tunnel and the right main tunnel. The utility model is provided with 1 axial flow fan at the right and left line positive openings, and is responsible for the ventilation of the tunnel face through the wind pipe; 2 axial flow fans are arranged at the opening of the parallel middle pilot tunnel and are responsible for air supply of all working surfaces in the parallel middle pilot tunnel through two air pipes respectively; the problems of the parallel three-hole tunnel press-in type ventilation design, long smoke discharging time, difficult ventilation, incomplete pollution discharge in the tunnel and the like are solved.
Description
Technical Field
The utility model belongs to the technical field of the tunnel engineering construction, concretely relates to structure of parallel three hole method tunnel forced ventilation.
Background
At present, in order to solve the problems of construction period and operation safety of single-end construction, parallel pilot holes are often arranged for assisting main hole construction, particularly for a bidirectional separation type road or railway tunnel, parallel middle pilot holes are arranged between a left main hole and a right main hole, main hole construction can be assisted in a construction period, and an emergency rescue channel can be used in an operation period. For example, a 22 kilometer high-speed Tianshan victory tunnel in Wulien in Xinjiang and a 15 kilometer high-speed Dalianshan tunnel in Lexi province are designed by a three-hole method, wherein a parallel middle pilot tunnel is constructed by adopting TBM (tunnel boring machine) to lead a main tunnel, and then a main tunnel operation surface is increased through a transverse hole, so that the construction of the main tunnel is accelerated. TBM (Tunnel Boring machine) is a tunnel Boring machine, and the TBM method adopts the equipment to carry out parallel continuous operation of construction procedures such as tunneling, supporting, deslagging and the like of a full-face tunnel Boring machine. The tunnel construction is in a relatively closed space environment, the construction ventilation is an indispensable technical link, particularly for an extra-long tunnel, along with the increase of the single-head tunneling distance, a working face is gradually far away from a tunnel opening and even can reach several kilometers, and harmful gases such as smoke dust, automobile exhaust and the like generated in the construction can not be naturally discharged, so that the requirements of personnel and equipment can only be met through forced ventilation. Especially for a three-tunnel method tunnel, the parallel middle pilot tunnel has more auxiliary operation surfaces, long ventilation distance of a single head, more operation surfaces such as drilling explosion, slag discharge, anchor spraying and the like in the tunnel in a peak period, more pollution sources such as smoke dust, harmful gas and the like in the tunnel, large ventilation pressure of the tunnel and complex ventilation organization. Poor ventilation of the tunnel not only harms the health of constructors and reduces the working efficiency, but also influences the operation of construction equipment, so that the ventilation is a problem which needs to be solved during construction.
The construction ventilation problem of the tunnel portal section of the Wuli high-speed Tianshan victory tunnel is combined, the maximum one-head ventilation distance in the construction of the three-portal method in the section reaches 4.8 kilometers, because the parallel middle pilot tunnel bears TBM and increases the construction of a main tunnel operation surface, the parallel middle pilot tunnel is also a main discharge channel of the dirty wind, the material organization pressure of the parallel middle pilot tunnel is also taken for dredging the two main tunnel communication portal sections, and the condition of tunnel type ventilation is not provided, so that the tunnel type ventilation between the three tunnels is difficult to be implemented, and only the one-head press-in type ventilation of the portal can be adopted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a structure that parallel three hole method tunnel forced ventilates is provided to blowdown scheduling problem not thoroughly in solving parallel three hole method tunnel ventilation design, the time of discharging fume is long, the ventilation difficulty and the tunnel.
In order to achieve the above object, the utility model adopts the following technical scheme:
a pressing-in type ventilation structure of a parallel three-hole tunnel comprises three parallel tunnels, wherein the three parallel tunnels are respectively a parallel middle pilot hole, a left line pilot hole and a right line pilot hole, the left line pilot hole and the right line pilot hole are respectively positioned on two sides of the parallel middle pilot hole, and a transverse channel for communication is arranged between every two adjacent tunnels.
Furthermore, the parallel middle pilot tunnel, the left line main tunnel and the right line main tunnel are respectively provided with an axial flow fan, the axial flow fans are connected to the corresponding tunnel face through air pipes, and the tail ends of the air pipes are provided with air quantity and air speed detectors.
Furthermore, the left line pilot hole and the right line pilot hole are communicated with the parallel middle pilot hole through transverse channels, and branch air pipes led out by axial flow fans of the parallel middle pilot holes are arranged in the left line pilot hole and the right line pilot hole from the parallel middle pilot hole through the transverse channels on the two sides.
Furthermore, an air door is arranged at the inlet of the branch air pipe.
Furthermore, jet fans are arranged in the transverse channel and the parallel middle pilot tunnels.
Furthermore, the parallel middle pilot tunnel opening is externally provided with at least two axial flow fans, wherein one axial flow fan is connected with the air pipe to the auxiliary operation surface of the left line main tunnel and the secondary fan of the TBM of the parallel middle pilot tunnel, and the other axial flow fan is connected with the air pipe to the auxiliary operation surface of the right line main tunnel.
Furthermore, the first air pipe connected with the two axial flow fans is arranged on the left and the right in a separated mode, the left air pipe is guided to the branch air pipe of the left-line main hole through the air door, and the right air pipe is guided to the branch air pipe of the right-line main hole through the air door; wherein the terminal of tuber pipe and two branch road tuber pipes all are provided with amount of wind and wind speed detector all around.
Furthermore, the air pipes of the parallel middle pilot tunnel, the left line main tunnel and the right line main tunnel are all arranged at the upper arch shoulder position of the tunnel.
Compared with the prior art, the utility model discloses the beneficial effect who produces is:
the utility model provides a structure that parallel three-hole method tunnel forced ventilates can solve the operation face that the supplementary main tunnel of parallel middle-guide-hole TBM construction faced many, the ventilation network is complicated, construction ventilation technical problem such as the difficulty of airing exhaust. The parallel middle pilot tunnel is used for assisting construction ventilation, so that the exhaust speed of the dirty air is increased, and the ventilation effect is good; determining the air volume and the air pressure of the axial flow fan according to the actual air volume, and adjusting an air door to realize the control of the air volume in front of the tunnel face; after the construction section of supplementary main tunnel link up, can use the air door antedisplacement to the supplementary main tunnel section of next cross passage, make full use of equipment practices thrift the cost, has guaranteed constructor's health safety in the hole simultaneously.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention;
fig. 2 is a cross-sectional view of the arrangement of the parallel middle pilot tunnel ductwork of fig. 1.
In the figure, 1-parallel middle pilot holes; 2-right hole of left line; 3-right line positive hole; 4-a transverse channel; 5-an axial flow fan; 6-air pipe; 7-a damper; 8-jet flow fan; 9-air quantity and air speed detector.
Detailed Description
The present invention will be described in detail with reference to the following detailed description and accompanying drawings.
Example 1:
referring to fig. 1, a press-in ventilation structure of a parallel three-hole tunnel comprises three parallel tunnels, wherein the three parallel tunnels are a parallel middle pilot hole 1, a left line pilot hole 2 and a right line pilot hole 3 respectively, the left line pilot hole 2 and the right line pilot hole 3 are positioned at two sides of the parallel middle pilot hole 1 respectively, and a transverse channel 4 for communication is arranged between adjacent tunnels; the parallel middle pilot tunnel 1 adopts a TBM method to carry out forward main tunnel construction, and the excavation working faces of the left-line main tunnel 2 and the right-line main tunnel 3 are increased through the transverse passage 4 to assist the construction of the left-line main tunnel 2 and the right-line main tunnel 3.
The section design of the air duct structure has to meet the size requirements of a bidirectional travelling crane and two air ducts 6, the front hole excavation working surface is increased through the transverse passage 4, and the transverse passage 4 at least meets the size requirements of the unidirectional travelling crane and the air ducts 6.
Example 2:
on the basis of embodiment 1, the utility model discloses a forced ventilation mode, ventilation equipment adopt axial fan 5.
Further, parallel well pilot tunnel 1, left side line pilot tunnel 2 and right side line pilot tunnel 3 all be equipped with axial fan 5, axial fan 5 is connected to the tunnel face that corresponds through tuber pipe 6, is provided with amount of wind and wind speed detector 9 at 6 ends of tuber pipe for the amount of wind that supplies of real-time supervision tuber pipe, according to air circumstance and the operation operating mode in the hole, the air pressure and the amount of wind of dynamic adjustment axial fan 5 satisfy the face requirement for wind.
Further, the left line main hole 2 and the right line main hole 3 are constructed by adopting a sectional type tunnel, the left line main hole 2 and the right line main hole 3 are communicated with the parallel middle pilot hole 1 through a transverse channel 4, the auxiliary operation surfaces of the two side main holes are increased through the transverse channel of the parallel middle pilot hole 1, and branch air pipes led out by the axial flow fan 5 of the parallel middle pilot hole 1 are arranged on the left line main hole 2 and the right line main hole 3 from the parallel middle pilot hole 1 through the transverse channels 4 on the two sides.
Further, the entrance of branch road tuber pipe install air door 7 for adjust the wind pressure, the amount of wind of left line positive hole 2 and right line positive hole 3, satisfy the face and need the wind requirement. In order to prevent blow-by of the dirty air, a jet fan 8 is arranged in the transverse channel 4 and the parallel middle guide hole 1.
In the above embodiment, the types of the axial flow fan 5 and the air pipe 6 are selected, and the wind pressure and the wind volume required by each working surface are calculated according to the construction organization design at different stages and the tunnel construction technical specification, so as to determine the model specification parameters of the axial flow fan 5 and the air pipe 6.
Example 3:
referring to fig. 1 and 2, on the basis of embodiment 1 or 2, further, the opening of the parallel middle pilot tunnel 1 at least comprises two axial fans 5, wherein one axial fan 5 connects the air duct 6 to the auxiliary working surface of the left straight pilot tunnel 2 and the secondary fan of the TBM of the parallel middle pilot tunnel 1, and the other axial fan 5 connects the air duct 6 to the auxiliary working surface of the right straight pilot tunnel 3.
Furthermore, the air pipes 6 connected with the two axial flow fans 5 are arranged on the left and right in a split manner, the left air pipe is led to the branch air pipe of the left line positive hole 2 through the air door 7, and the right air pipe is led to the branch air pipe of the right line positive hole 3 through the air door 7; wherein, the tail end of one air pipe 6 and the tail ends of the two branch air pipes are provided with an air quantity and air speed detector 9.
Furthermore, the air pipes 6 of the parallel middle pilot tunnel 1, the left line main tunnel 2 and the right line main tunnel 3 are all arranged at the upper arch shoulder position of the tunnel.
Furthermore, the transverse channel 4 intersects with the parallel middle pilot tunnel 1, the left line main tunnel 2 and the right line main tunnel 3 at a small angle, so that the bending of the air pipe 6 is reduced, and the air loss is reduced.
The number of the air doors 7 is determined according to the working face of the auxiliary left and right main holes, and the air doors 7 are moved forwards in time according to the construction progress.
The air quantity and air speed detector 9 arranged at the tail end of the branch air pipe of the auxiliary main tunnel construction section reasonably adjusts the air quantity, the air pressure and the air door 7 of the axial fan 5 at the port 1 of the parallel middle pilot tunnel according to the feedback data of the air quantity at the tail end of the actual air pipe so as to adjust the air supply quantity of the tunnel face.
In order to accelerate the discharge of the dirty air, the jet fans 8 are arranged in the parallel middle pilot tunnel 1 and the transverse channel 4 for flow guiding, the jet fans 8 are additionally arranged at certain intervals after the tunnel construction is carried out for a long distance, the rapid discharge of the dirty air is accelerated, and finally the dirty air is directly discharged out of the tunnel through the parallel middle pilot tunnel 1.
As the parallel middle pilot tunnel is used as a material and slag-out transportation channel of TBM operation and left and right main tunnel subsection construction operation faces, the tunnel portal section of the three-tunnel can only adopt a press-in type ventilation mode. The utility model is provided with 1 axial flow fan at the right and left line positive openings, and is responsible for the ventilation of the tunnel face through the wind pipe; 2 axial flow fans are arranged at the opening of the parallel middle pilot tunnel and are responsible for air supply of all working surfaces in the parallel middle pilot tunnel through two air pipes respectively; the problems of the parallel three-hole tunnel press-in type ventilation design, long smoke discharging time, difficult ventilation, incomplete pollution discharge in the tunnel and the like are effectively solved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The components and structures of the present invention not described in detail belong to the known components and structures in the industry, and are not described in detail herein.
Claims (8)
1. A parallel three-hole method tunnel press-in type ventilation structure is characterized in that: the tunnel comprises three parallel tunnels, wherein the three parallel tunnels are respectively a parallel middle pilot tunnel (1), a left line pilot tunnel (2) and a right line pilot tunnel (3), the left line pilot tunnel (2) and the right line pilot tunnel (3) are respectively positioned at two sides of the parallel middle pilot tunnel (1), and a transverse channel (4) for communication is arranged between every two adjacent tunnels.
2. The press-in ventilation structure of the parallel three-hole tunnel according to claim 1, wherein: the tunnel is characterized in that the parallel middle pilot tunnel (1), the left line main tunnel (2) and the right line main tunnel (3) are respectively provided with an axial flow fan (5), the axial flow fans (5) are connected to corresponding tunnel faces through air pipes (6), and the tail ends of the air pipes (6) are provided with air quantity and air speed detectors (9).
3. The press-in ventilation structure of the parallel three-hole tunnel according to claim 1, wherein: the left line pilot tunnel (2) and the right line pilot tunnel (3) are communicated with the parallel middle pilot tunnel (1) through the transverse channels (4), and branch air pipes led out by the axial flow fan (5) of the parallel middle pilot tunnel (1) are arranged from the parallel middle pilot tunnel (1) through the transverse channels (4) on the two sides to the left line pilot tunnel (2) and the right line pilot tunnel (3).
4. The press-in ventilation structure of the parallel three-hole tunnel according to claim 3, wherein: and an air door (7) is arranged at the inlet of the branch air pipe.
5. The press-in ventilation structure of the parallel three-hole tunnel according to claim 1, wherein: and jet fans (8) are arranged in the transverse channel (4) and the parallel middle pilot tunnels (1).
6. The press-in ventilation structure of the parallel three-hole tunnel according to claim 5, wherein: the opening of the parallel middle pilot tunnel (1) at least comprises two axial flow fans (5), wherein one axial flow fan (5) is connected with an air pipe (6) to an auxiliary operation surface of the left line positive tunnel (2) and a secondary fan of the TBM of the parallel middle pilot tunnel (1), and the other axial flow fan (5) is connected with the air pipe (6) to an auxiliary operation surface of the right line positive tunnel (3).
7. The press-in ventilation structure of the parallel three-hole tunnel according to claim 6, wherein: the air pipes (6) connected with the two axial flow fans (5) are arranged on the left and right sides respectively, the left air pipe is led to the branch air pipe of the left-line main hole (2) through the air door (7), and the right air pipe is led to the branch air pipe of the right-line main hole (3) through the air door (7); wherein, the tail end of one air pipe (6) and the tail ends of the two air pipes are provided with an air quantity and air speed detector (9).
8. The press-in ventilation structure of the parallel three-hole tunnel according to any one of claims 1 to 7, wherein: and air pipes (6) of the parallel middle pilot tunnel (1), the left line main tunnel (2) and the right line main tunnel (3) are arranged at the upper arch shoulder position of the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120376201.7U CN214787495U (en) | 2021-02-19 | 2021-02-19 | Press-in type ventilation structure of parallel three-hole tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120376201.7U CN214787495U (en) | 2021-02-19 | 2021-02-19 | Press-in type ventilation structure of parallel three-hole tunnel |
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| CN214787495U true CN214787495U (en) | 2021-11-19 |
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| CN202120376201.7U Active CN214787495U (en) | 2021-02-19 | 2021-02-19 | Press-in type ventilation structure of parallel three-hole tunnel |
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