CN112879051A - Underground chamber structure for ramp expansion period and construction method - Google Patents
Underground chamber structure for ramp expansion period and construction method Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 239000011435 rock Substances 0.000 claims abstract description 51
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- 229910000831 Steel Inorganic materials 0.000 claims description 71
- 239000010959 steel Substances 0.000 claims description 71
- 238000009423 ventilation Methods 0.000 claims description 26
- 239000004567 concrete Substances 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 14
- 238000004062 sedimentation Methods 0.000 claims description 7
- 238000009415 formwork Methods 0.000 claims description 6
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 230000008569 process Effects 0.000 abstract description 11
- 238000010008 shearing Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 230000005641 tunneling Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
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- 230000035939 shock Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000004887 air purification Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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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
- E21F16/00—Drainage
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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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
- E21F17/12—Dam doors
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Abstract
The invention discloses an underground chamber structure of a ramp in an extension period and a construction method, and belongs to the field of mine construction. This chamber structure includes the country rock, the country rock has the ramp, be equipped with the chamber wall body that extends along the length direction of ramp in the ramp, chamber wall body and country rock fixed connection are equipped with the chamber passageway in the chamber wall body, and the medial extremity portion of chamber passageway is equipped with the water proof gate, the lateral surface of chamber wall body is domes, is equipped with the rail in the anchor goes into the country rock in it, and it can replace the wedge shape wall structure that conventional water proof gate chamber adopted, on the basis that reduces construction volume, construction strength and construction cost, possesses the shearing resistance and the antifriction of preferred, and waterproof capacity is splendid. The construction method can build the chamber structure with higher strength, and the whole process is convenient to construct and has lower construction cost.
Description
Technical Field
The invention belongs to the technical field of mine construction, and particularly relates to an underground chamber structure and a construction method in a ramp expansion period.
Background
Most of traditional underground mines are vertical shaft development, personnel, materials and materials are all put down to each position in the pit through the auxiliary shaft, the ore extracted from the underground is lifted to the ground through the main shaft, and the vertical shaft is the only safety channel of the underground mine, so that the transportation of the personnel and the materials is very troublesome. At present, most underground mines are provided with slope roads which are directly communicated with the earth surface, and although the slope roads have the defects of large engineering quantity, long construction period and high construction cost, the slope roads can be directly communicated to all underground positions from the earth surface, so that the transportation of personnel and materials is facilitated, the efficiency and the benefit are greatly improved, and the slope roads are the most reliable safety passages for underground escape.
After decades of arduous development of mining industry, underground mining conditions available for mining become more and more complex, especially hydrogeological conditions, which bring considerable problems to mine infrastructure and production. In recent years, mine water inrush events often occur, causing great property loss and life safety. At present, most underground mines in China are built and produced in stages, so that water prevention and control in the ramp expansion construction process are particularly important for underground mines in production, and if no powerful and reliable guarantee measure is provided, once water in an aquifer is communicated, flood disasters of large mines can be caused, and huge losses are caused.
Generally, after the underground mine is completely built with the basic roadway, a watertight gate chamber is arranged in the lowest-level transportation roadway, and a chamber channel which penetrates through the chamber and is used for transportation is arranged in the chamber. The chamber is formed by concrete directly cast on the surrounding rock, and generally, in order to ensure the stable structure of the chamber wall body, the chamber adopts a wedge-shaped structure in the surrounding rock, thereby providing sufficient buffer force for the waterproof gate chamber in the case of flood and improving the waterproof capability of the waterproof gate chamber. However, when concrete is cast in the wedge-shaped surrounding rock, the concrete is difficult to be closely connected with the top surrounding rock, and a closed shear-resistant pressure wall body is difficult to form, thereby reducing the impact resistance of the watertight gate chamber. Particularly, when surrounding rocks of the wedge structure are excavated and a concrete wall is cast in the wedge structure, the overall engineering amount and the construction labor intensity are great due to the complexity of the wedge structure, and the construction cost is greatly increased.
For example, the Chinese patent application number is: CN201811224361.9, published date: 2019 patent literature 2, 12 and a month discloses a mine underground water gate chamber drainage ditch water stopping device, which is arranged at a drainage ditch of a water gate chamber, and comprises: the first pipeline is embedded in a bearing wall of the waterproof gate and is connected with drainage ditches at two sides of the waterproof gate; and the second pipeline is arranged in the indoor drainage ditch of the water-proof gate chamber and is connected with the first pipeline through a valve. As is obvious from the figure, the chamber wall is cast and formed in the surrounding rock in a wedge-shaped structure.
Also, for example, the Chinese patent application number is: CN201811198720.8, published date: 2019, 2, 12 and discloses an auxiliary drainage device for an underground mine water gate chamber, which comprises: the first pipeline is embedded in a bearing wall of the waterproof gate chamber and obliquely arranged; a sump located within the watertight gate chamber and disposed below the first pipe; the first valve is arranged on the first pipeline and controls the communication or the closing of the first pipeline through the opening or the closing of the first valve.
The two schemes are related to the underground water-proof gate chamber of the mine, although the descriptions of the two schemes do not describe the wall structure of the chamber, the drawings of the descriptions of the two schemes obviously show that the chamber walls of the two schemes are cast and formed in surrounding rocks in a wedge-shaped structure, so that the two schemes have the problems of the wedge-shaped chamber walls. Although the existing water gate chamber wall body with a non-wedge structure exists in the prior art, the chamber wall body is difficult to have a high-strength structure, and the shock resistance is not strong in flood.
Disclosure of Invention
1. Problems to be solved
Aiming at the problem that the wall structure of the existing waterproof gate chamber of the underground mine in the extension period is not ideal, the invention provides the chamber structure of the ramp extension period, which replaces the wedge-shaped wall structure adopted by the conventional waterproof gate chamber, has better shearing resistance and friction resistance and excellent waterproof capability on the basis of reducing the construction amount, construction strength and construction cost.
The invention also provides a chamber construction method in the ramp expansion period, which can build a chamber structure with higher strength, and has convenient overall process construction and lower construction cost.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
The utility model provides a ramp expansion period's chamber structure, includes the country rock, the country rock has the ramp, be equipped with the chamber wall body that extends along the length direction of ramp in the ramp, chamber wall body and country rock fixed connection are equipped with the chamber passageway in the chamber wall body, and the medial extremity of chamber passageway is equipped with water gate, the lateral surface of chamber wall body is domes, is equipped with the rail in the anchor country rock in it.
As a further improvement of the technical scheme, a plurality of groups of steel rails are arranged on the chamber wall body along the length direction of the chamber wall body, and each group of steel rails has at least 8 steel rails; the length of each steel rail anchored in the surrounding rock is not less than 1000mm, and the length of each steel rail anchored in the wall body of the underground chamber is not less than 500 mm.
As a further improvement of the technical scheme, a plurality of groups of anchor rods for anchoring surrounding rocks are arranged on the wall body of the underground chamber along the length direction of the wall body.
As a further improvement of the technical scheme, a drainage pipeline is arranged at the bottom of the chamber wall body; the outer side end of the drainage pipeline is connected with the drainage ditch, and a sedimentation tank is arranged at the bottom of the slope way at the inner side end of the drainage pipeline.
As a further improvement of the technical scheme, a high-pressure valve is arranged at the part of the outer side end of the drainage pipeline, which extends out of the wall body of the chamber.
As a further improvement of the technical scheme, a ventilating pipeline is arranged at the upper part of the chamber wall body; the inner side end of the ventilation pipeline is communicated with the inside of the slope way, and the outer side end of the ventilation pipeline is connected with the fan.
As a further improvement of the technical scheme, longitudinal steel bars are arranged in the chamber wall along the length direction of the chamber wall, annular steel bars which are arranged in a crossed mode with the longitudinal steel bars are arranged along the circumferential direction of the chamber wall, and the longitudinal steel bars and the annular steel bars are connected through tie bars.
As a further improvement of the technical scheme, the waterproof gate is provided with two waterproof gates which are respectively hinged with two sides of the end part of the inner side of the underground chamber channel and can seal the underground chamber channel.
As a further improvement of the technical scheme, a steel sleeve is arranged in the chamber wall along the length direction of the chamber wall.
A chamber construction method in a ramp expansion period comprises the following steps:
s1, excavating a slope way in the surrounding rock;
s2, selecting a chamber position, installing steel rails and anchor rods on a surrounding rock surface, installing drainage pipes at the bottom of the ramp and casting concrete;
s3, installing a waterproof gate frame, and casting concrete at the lower part of the chamber;
s4, binding longitudinal steel bars, annular steel bars and tie bars on two sides of the chamber, supporting wall formworks on two sides and casting concrete;
s5, installing a ventilating duct on the upper part of the chamber;
s6, binding longitudinal steel bars, annular steel bars and tie bars at the upper part of the chamber, supporting an upper wall formwork and casting concrete;
s7, installing a waterproof gate on the waterproof gate door frame;
s8, installing a high-pressure valve at the part of the outer side end of the drainage pipeline extending out of the wall body of the chamber;
and S9, connecting the outer end of the ventilation pipeline with a fan.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the chamber structure in the slope ramp expansion period, the large steel rail anchored into the surrounding rock is arranged on the chamber wall body, so that the connection strength of the chamber wall body and the surrounding rock is effectively enhanced, and the chamber can have higher impact resistance even if a wedge-shaped wall body structure is not adopted, so that the existing wedge-shaped chamber wall body structure is replaced, the construction amount and the construction strength are reduced, and the construction cost is reduced;
(2) according to the chamber structure of the ramp expansion period, a plurality of groups of anchor rods which are small in size and are anchored into the surrounding rock are arranged on the chamber wall body, so that the connection strength between the chamber wall body and the surrounding rock can be enhanced, and the overall stability and the impact resistance of the chamber structure are improved;
(3) according to the chamber structure in the ramp expansion period, the drainage pipeline is arranged at the bottom of the chamber, and two ends of the drainage pipeline are respectively communicated with the sedimentation tank and the drainage ditch, so that accumulated water in the ramp can smoothly flow out of the drainage pipeline in the expansion process, and the normal expansion excavation work of the ramp is stably and continuously carried out;
(4) according to the chamber structure during the extension period of the slope, the ventilation pipeline is arranged at the upper part of the chamber, so that the air circulation in the slope can be accelerated, harmful gas in the slope is discharged, the body health of workers is ensured, and the ventilation pipeline is arranged at the upper part of the chamber;
(5) according to the chamber structure during the ramp expansion period, the steel bar structure and the steel sleeve which are reasonably arranged are arranged in the chamber wall body, so that the overall strength of the chamber wall body is effectively improved, and the overall stability and the shock resistance of the chamber structure are enhanced;
(6) the invention relates to an underground chamber structure in the extension period of a slope way, a waterproof gate of the underground chamber structure is provided with two waterproof gates, the two waterproof gates are respectively hinged with two sides of the inner side end part of an underground chamber wall body and can seal an underground chamber channel, the underground chamber structure replaces a traditional single-leaf door structure, the weight of each door is greatly reduced, the underground chamber structure is convenient to transport and install, the underground chamber channel can be rapidly sealed in the flood, and the safety performance is greatly improved;
(7) according to the chamber structure of the ramp expansion period, the reinforced concrete chamber is arranged in the stable surrounding rock, the ventilating pipeline is arranged at the middle upper part of the concrete chamber, the drainage pipeline structure is arranged at the bottom of the concrete chamber, the waterproof gate is arranged at the inner side end of the chamber channel, the air cylinder waterproof cover plate is arranged at the inner side end of the ventilating pipeline, and the high-pressure valve is arranged at the outer side end of the drainage pipeline, so that the whole closed impact resistance of the chamber can be formed, large sudden water gushing can be prevented and controlled in the ramp tunneling process, the normal tunneling of the ramp cannot be influenced, the safety in the ramp tunneling process is ensured, and compared with the traditional wedge-shaped chamber wall body, the structure is simple and reliable, and the construction cost is greatly reduced;
(8) the underground chamber construction method for the extension period of the slope ramp can be used for constructing the underground chamber structure which is high in strength and has good waterproof capability and ventilation capability, and is convenient in overall process construction and low in construction cost.
Drawings
FIG. 1 is a top sectional view of a chamber structure;
FIG. 2 is a front sectional view of a chamber structure;
FIG. 3 is a side elevation cross-sectional view of the location of the structural rails of the chamber;
FIG. 4 is a side cross-sectional view of the location of the chamber structural reinforcement;
FIG. 5 is a side cross-sectional view of the location of the anchor in the chamber structure;
FIG. 6 is a schematic view of the installation of longitudinal rebars, ring rebars, and tie bars;
in the figure: 1. surrounding rocks; 2. a ramp; 3. a chamber wall; 4. a chamber passageway; 5. a steel rail; 6. an anchor rod; 7. a water discharge pipeline; 8. a drainage ditch; 9. a sedimentation tank; 10. a ventilation duct; 11. a high pressure valve; 12. longitudinal reinforcing steel bars; 13. an annular reinforcing bar; 14. stretching the ribs; 15. a watertight gate; 16. a steel sleeve.
Detailed Description
The invention is further described with reference to specific embodiments and the accompanying drawings.
Example 1
A chamber structure of a slope ramp expansion period is mainly used for sealing a slope ramp when sudden water channeling occurs during the expansion of the slope ramp of an underground mine, so that the external structure of the slope ramp and workers are prevented from being seriously damaged by flood disasters, and the specific structure and the working principle of the chamber structure are described in detail below.
As shown in fig. 1 to 6, the chamber structure mainly comprises surrounding rocks 1, a slope ramp 2, a chamber wall 3, steel rails 5, anchor rods 6, drainage pipelines 7 and ventilation pipelines 10. The surrounding rock 1 belongs to the natural environment around the ramp 2, and the ramp 2 is formed by excavating in the surrounding rock. The chamber wall 3 is arranged in the ramp 2 and extends along the length direction of the ramp 2, and the outer side surface of the chamber wall is fixedly connected with the surrounding rock 1 to form a sealing structure. A chamber channel 4 for transportation is arranged in the chamber wall body 3, the inner side end of the chamber channel 4 is communicated with the inside of the ramp 2, the outer side end of the chamber channel 4 is communicated with the outside of the ramp 2, and a waterproof gate 15 for closing the chamber channel 4 is arranged at the inner side end of the chamber channel 4. In the embodiment, the chamber wall 3 is arranged at a position which is not less than 50m away from the tunneling head, namely the preset excavation tail end of the slope 2, the length of the chamber wall is not less than 7m, the thickness of the side part and the upper part is not less than 600mm, the thickness of the lower part is not less than 300mm, and the grade of the adopted concrete is not less than C35; the width of the chamber channel 4 is not less than 2800mm, the height is not less than 2600mm, and the length is consistent with the chamber wall 3.
The steel rail 5 and the anchor rod 6 are both arranged on the chamber wall body 3 and are anchored into the surrounding rock 1 to strengthen the connection strength of the chamber wall body 3 and the surrounding rock 1, but the actual structures of the steel rail 5 and the surrounding rock 1 have great difference, so that the actual construction processes of the steel rail and the surrounding rock are different, and the fact can be obviously seen from the naming of the steel rail and the surrounding rock. Specifically, at least 4 groups of steel rails 5 are arranged on the chamber wall body 3 along the length direction of the chamber wall body, each group of steel rails 5 has at least 8 steel rails, the length of each steel rail 5 anchored into the surrounding rock 1 is not less than 1000mm, and the length of each steel rail 5 extending into the chamber wall body 3 is not less than 500 mm. At least 8 groups of anchor rods 6 are arranged on the chamber wall body 3 along the length direction of the chamber wall body, each group is not less than 8, the diameter of each anchor rod 6 is not less than 22mm, the length of each anchor rod is not less than 2250mm, and the embodiment adopts high-performance thread steel resin anchor rods. By arranging the heavy steel rail 5, the chamber can have higher impact resistance even if a wedge-shaped wall structure is not adopted, so that the existing wedge-shaped wall structure of the chamber is replaced, the construction amount and the construction strength are reduced, and the construction cost is reduced. Therefore, the outer side surface of the chamber wall 3 of the present embodiment, which is in direct contact with the surrounding rock, is configured as an arch structure which is easier to excavate and cast.
However, when the underground chamber in the slope ramp 2 is constructed, air circulation and accumulated water discharge in the slope ramp 2 need to be ensured, and the normal extension excavation work of the slope ramp 2 is ensured to be stably and continuously carried out. Whereas in the existing underpass structure, the ventilation and drainage pipe sections are located in the chamber gallery 4 or additional separate passages are excavated in the surrounding rock 1. When the waterproof gate is arranged in the chamber channel 4, the transportation work is influenced, and the integral sealing performance of the chamber when the waterproof gate 15 is closed is influenced; and the extra independent channel excavated in the surrounding rock 1 increases the construction amount, and simultaneously reduces the overall impact resistance and shear resistance of the chamber structure, and reduces the waterproof capability.
In view of the above, the ventilation duct 10 and the drainage duct 7 of the present embodiment are arranged as follows. Two sides of the bottom of the chamber wall body 3 are respectively provided with a groove extending along the length direction of the slope 7, the drainage pipeline 7 is arranged in the groove, the groove and the chamber wall body 3 are integrally formed through casting concrete, and the overall strength is high. The inner end and the outer end of the drainage pipeline 7 are respectively communicated with the inside and the outside of the slope 2, specifically, the bottom of the slope 2 at the inner end is provided with a sedimentation tank 9, the bottom of the slope 2 at the outer end is provided with a drainage ditch 8, and the inner end and the outer end of the drainage pipeline 7 are respectively communicated with the sedimentation tank 9 and the drainage ditch 8. Accumulated water in the slope 2 is accumulated to a certain depth in the sedimentation tank 9, and then can be discharged to the drainage ditch 8 through the drainage pipeline 7, so that the accumulated water in the slope 2 is avoided. In order to control the work of the drainage pipeline 7 and prevent a large amount of water from being sprayed out of the drainage pipeline 7 when sudden water channeling occurs, a high-pressure valve 11 for controlling the opening and closing of the drainage pipeline 7 is arranged at the part, extending out of the chamber wall 3, of the outer side end of the drainage pipeline 7, and the high-pressure valve 11 can be closed firstly when the sudden water channeling occurs and then opened slowly for drainage when water is drained. In this embodiment, the length of the drainage pipeline 7 is 2000mm, the diameter is not less than 300mm, the front and rear sections of the drainage pipeline are respectively lengthened on the basis of the length of the chamber channel 4, and the high-pressure valve 11 bears the same pressure as the water-proof gate 15.
The ventilation pipeline 10 is arranged at the upper part of the chamber wall 3 along the length direction of the chamber wall 3, the inner end part of the ventilation pipeline is provided with a soft air cylinder communicated with the inside of the slope 2, and the outer end part of the ventilation pipeline is provided with a soft air cylinder connected with an external fan. In this embodiment, two ventilation ducts 10 are symmetrically arranged on the upper portion of the chamber wall 3 along the middle of the wide side of the chamber wall 3, the two ventilation ducts 10 are respectively connected with a fan, and the fan can respectively adopt two blowers to simultaneously supply fresh air to the inclined ramp 2 according to actual working conditions, or adopt one blower to supply fresh air and another exhaust fan to exhaust air, so that the air circulation of the inclined ramp is accelerated, and the air purification effect is improved. The end part of the inner side of the ventilation pipeline 10 connected with the soft air cylinder is provided with the waterproof cover plate, so that the ventilation pipeline 10 has better waterproof capability and can prolong the service life. The ventilating duct 10 is arranged on the upper part of the chamber wall body 3, so that the transportation work of the chamber channel 4 is not influenced, the sealing performance of the chamber structure can be ensured when the chamber wall body 3 is formed by concrete casting, a perfect water-resistant sealing structure is formed, and the impact resistance and the waterproof capability of the chamber structure cannot be reduced. In the embodiment, the ventilation duct 10 is made of a rigid material, the length of the ventilation duct is 1000mm longer at the front end and the rear end of the ventilation duct on the basis of the length of the chamber channel 4, the diameter of the ventilation duct is not less than 800mm, and the thickness of the air duct is not less than 6 mm.
In the overall structure of the underground chamber, the reinforced concrete underground chamber is arranged in the stable surrounding rock 1, the ventilating pipeline 10 is arranged at the middle upper part of the concrete underground chamber, the drainage pipeline 7 structure is arranged at the bottom of the concrete underground chamber, the waterproof gate 15 is arranged at the inner side end of the underground chamber channel 4, the air cylinder waterproof cover plate is arranged at the inner side end of the ventilating pipeline 10, and the high-pressure valve 11 is arranged at the outer side end of the drainage pipeline 7, so that the overall airtight shock resistance of the underground chamber can be formed, large burst water can be prevented and controlled in the process of tunneling the slope ramp, meanwhile, the normal tunneling of the slope ramp cannot be influenced, and the safety in the process of tunneling the slope is ensured. Therefore, compare traditional wedge chamber wall body, this embodiment can set up the lateral surface of chamber wall body 3 into the domes of being under construction more easily, simple structure, reliable, very big reduction construction cost.
It should be noted that the strength of the chamber wall 3 is also very important for improving the overall shear resistance and impact resistance of the chamber structure, and in this embodiment, the strength of the chamber wall 3 is greatly improved by arranging a unique reinforcing steel bar structure in the chamber wall 3, and meanwhile, the construction of the wall during casting is more convenient. Specifically, the lower part of the chamber wall 3 is provided with lower transverse steel bars along the width direction of the chamber wall 3, longitudinal steel bars 12 along the length direction of the chamber wall, annular steel bars 13 which are arranged to intersect with the longitudinal steel bars 12 and the lower transverse steel bars are arranged along the circumferential direction of the chamber wall, and the longitudinal steel bars 12 and the annular steel bars 13 are connected through tie bars 14. Meanwhile, steel sleeves 16 extending along the length direction of the chamber wall 3 are symmetrically arranged on two sides of the chamber wall. By the steel bar structure and the steel sleeve 16, the overall strength of the chamber wall 3 is effectively improved, and the overall stability and the shock resistance of the chamber structure are enhanced.
It should be noted that the floodgate 15 of the present embodiment has two pieces, and the two pieces of floodgate 15 are respectively hinged to two opposite side edges of the inner end of the chamber passage 4 and can rotate along the hinge point. When the two water-proof gates 15 rotate towards the middle of the chamber channel 4, the contact parts of the two water-proof gates 15 can be hermetically spliced together to seal the chamber channel 4 and prevent water from flowing into the chamber channel 4. The traditional single-leaf door is extremely important, inconvenient to install and slow to close, and is difficult to rapidly close the chamber channel 4 when sudden water channeling occurs. The waterproof gate 15 of the embodiment replaces the traditional single-leaf door structure, the weight of each leaf of door is greatly reduced, the transportation and the installation are convenient, the chamber channel 4 can be rapidly sealed in case of flood, and the safety performance is greatly improved.
In summary, the chamber structure of the slope ramp extension period of the embodiment replaces a wedge-shaped wall structure adopted by a conventional water-proof gate chamber, and has better shearing resistance and friction resistance and excellent water resistance on the basis of reducing construction amount, construction strength and construction cost.
Example 2
A chamber construction method in a ramp expansion period comprises the following steps:
s1, designing a slope road rough section line and a net section line in the chamber when the slope road 2 excavates, drilling, charging, blasting and discharging waste rocks in the stable surrounding rock 1 according to the designed position of the slope road rough section line, and excavating the slope road rough section line.
S2, selecting a chamber position, installing steel rails 5 and anchor rods 6 on the surrounding rock 1 surface of the selected chamber position, forming grooves for installing drainage pipelines 7 on two sides of the bottom of the ramp 2, installing drainage pipelines 7 in the grooves, tightly sealing the grooves through cast concrete, and extending part of the cast concrete from the inner end and the outer end of each drainage pipeline 7.
And S3, installing a waterproof gate 15 door frame, laying transverse steel bars at the lower part of the chamber, and casting concrete at the lower part of the chamber.
S4, binding longitudinal steel bars 12, annular steel bars 13 and tie bars 14 on two sides of the chamber, installing steel sleeves 16 on two sides, supporting wall formworks on two sides, casting concrete to form chamber walls 3 on two sides, and coating the steel rails 5, the anchor rods 6 and the steel bars.
And S5, installing a ventilating duct 10 at the upper part of the chamber.
And S6, binding longitudinal steel bars 12, annular steel bars 13 and tie bars 14 on the upper part of the chamber, supporting the upper wall formwork and casting concrete, wherein the concrete forms the upper chamber wall 3 and wraps the steel rails 5, the anchor rods 6 and the steel bars. At this time, the lower part, both sides and the upper part together form an arch-shaped chamber wall 3 hermetically connected with the surrounding rock 1, and a chamber channel 4 is formed inside the chamber wall 3.
And S7, installing the waterproof gate 15 on the waterproof gate 15 door frame, wherein the waterproof gate 15 door frame is positioned at the inner side end part of the chamber channel 4.
S8, installing a high pressure valve 11 at the part of the outer side end of the drainage pipeline 7 extending out of the chamber wall 3.
And S9, connecting the outer end of the ventilation pipeline 10 with a fan.
The chamber construction method can build the chamber structure which has higher strength, better waterproof capability and ventilation capability and is convenient in the whole process construction and lower in construction cost in the embodiment 1.
The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a ramp extension period's chamber structure, includes country rock (1), country rock (1) has ramp (2), be equipped with chamber wall body (3) that extend along the length direction of ramp (2) in ramp (2), chamber wall body (3) and country rock (1) fixed connection are equipped with chamber passageway (4) in chamber wall body (3), and water gate (15), its characterized in that are equipped with to the medial extremity of chamber passageway (4): the outer side surface of the chamber wall body (3) is of an arch structure, and a steel rail (5) anchored into the surrounding rock (1) is arranged in the arch structure.
2. The structure of a ramp extension chamber as claimed in claim 1, wherein: a plurality of groups of steel rails (5) are arranged on the chamber wall body (3) along the length direction of the chamber wall body, and each group of steel rails (5) is provided with at least 8 steel rails; the length of each steel rail (5) anchored into the surrounding rock (1) is not less than 1000mm, and the length of each steel rail extending into the chamber wall (3) is not less than 500 mm.
3. The structure of a ramp extension chamber as claimed in claim 2, wherein: and a plurality of groups of anchor rods (6) anchored into the surrounding rock (1) are arranged on the chamber wall body (3) along the length direction of the chamber wall body.
4. The structure of a ramp extension chamber as claimed in claim 1, wherein: a drainage pipeline (7) is arranged at the bottom of the chamber wall body (3); the outer side end of the drainage pipeline (7) is connected with a drainage ditch (8), and a sedimentation tank (9) is arranged at the bottom of the slope way (2) at the inner side end of the drainage pipeline.
5. The structure of a ramp extension chamber of claim 4, wherein: and a high-pressure valve (11) is arranged at the part of the outer side end of the drainage pipeline (7) extending out of the chamber wall body (3).
6. The structure of a ramp extension chamber of claim 5, wherein: a ventilating duct (10) is arranged at the upper part of the chamber wall body (3); the inner side end of the ventilation pipeline (10) is communicated with the inside of the slope way (2), and the outer side end of the ventilation pipeline is connected with a fan.
7. The structure of a ramp extension chamber as claimed in any one of claims 1 to 6, wherein: longitudinal steel bars (12) are arranged in the chamber wall body (3) along the length direction of the chamber wall body, annular steel bars (13) which are arranged in a crossed mode with the longitudinal steel bars (12) are arranged along the circumferential direction of the chamber wall body, and the longitudinal steel bars (12) are connected with the annular steel bars (13) through tie bars (14).
8. The structure of a ramp extension chamber as claimed in any one of claims 1 to 6, wherein: the waterproof gate (15) is provided with two leaves, and the two leaves of the waterproof gate (15) are respectively hinged with two sides of the end part of the inner side of the chamber channel (4) and can seal the chamber channel (4).
9. The construction method of a chamber structure for a ramp extension period according to any one of claims 1 to 6, characterized in that: a steel sleeve (16) is arranged in the chamber wall body (3) along the length direction of the chamber wall body.
10. A method of constructing a chamber for ramp extension periods as claimed in any one of claims 1 to 9, comprising the steps of:
s1, excavating a slope way (2) in the surrounding rock (1);
s2, selecting a chamber position, installing steel rails (5) and anchor rods (6) on the surface of the surrounding rock (1), installing drainage pipelines (7) at the bottom of the slope (2) and casting concrete;
s3, installing a waterproof gate (15) door frame, and casting concrete at the lower part of the chamber;
s4, binding longitudinal steel bars (12), annular steel bars (13) and tie bars (14) on two sides of the chamber, supporting wall formworks on two sides and casting concrete;
s5, installing a ventilating duct (10) at the upper part of the chamber;
s6, binding longitudinal steel bars (12), annular steel bars (13) and tie bars (14) at the upper part of the chamber, supporting an upper wall formwork and casting concrete;
s7, installing the waterproof gate (15) on the waterproof gate (15) door frame;
s8, installing a high-pressure valve (11) at the part of the outer side end of the drainage pipeline (7) extending out of the chamber wall body (3);
and S9, connecting the outer end of the ventilation pipeline (10) with a fan.
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| CN202110361355.3A CN112879051B (en) | 2021-04-02 | 2021-04-02 | Chamber structure in slope ramp extension period and construction method |
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| CN202110361355.3A CN112879051B (en) | 2021-04-02 | 2021-04-02 | Chamber structure in slope ramp extension period and construction method |
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