CN114517690A - Construction method of contact channel in hard rock stratum - Google Patents

Abstract

The application discloses construction method of interconnection passageway in hard stratum, it is through utilizing rope saw outside-in to divide the region, segmentation cutting interconnection passageway section stratum, the rock post that recycles cutting device will be cut off by the formation after the rope saw cutting one by one, thereby can directly take out in the stratum with the rock post, realize the segmentation excavation to the interconnection passageway, thereby need not to continue to connect the track when arranging the rope saw, also need not frequently to adjust the length of rope saw chain, the efficiency of construction has been improved greatly. And the rock column formed after cutting is relatively kept complete, can be recycled, and has higher economic value.

Description

Construction method of contact channel in hard rock stratum

Technical Field

The application relates to the technical field of tunnel construction, in particular to a construction method of a contact channel in a hard rock stratum.

Background

The communication channel is a tunnel between two parallel subway tunnels, the function of the communication channel is to ensure the driving safety and the communication in the two parallel tunnels, and once accidents such as traffic accidents, fire disasters and the like happen in a certain tunnel, related personnel can safely transfer to the other tunnel from the communication channel to escape.

The existing connection channel is mainly excavated by adopting a water drilling method and an explosion method, the water drilling method is mainly used for soft soil layers in geology, and when the geology is a hard rock stratum, the construction efficiency of the water drilling method is greatly reduced. In the existing blasting method construction, slag is removed after blasting by using explosives, tunnel walls formed by blasting are uneven, blasting inevitably damages mountain and rock mass structures, so that the stability of the mountain is poor, collapse is easy to happen, the safety of constructors and equipment is endangered, and the material cost of manpower and the like for ensuring the safety in tunnel construction is continuously increased.

Therefore, the construction of the tunnel in the hard soil layer is mostly carried out by adopting a wire saw machine at present. The rope saw comprises a main machine, a driving wheel, a guide wheel, a track, a rope saw chain and the like. During construction, cutting areas are divided on a construction surface according to a calculation result, then drilling is carried out according to side lines of the divided cutting areas, and then the rope saw chain penetrates into two drill holes on the same side line. During cutting, the driving wheel drives the rope saw chain to rotate, the rope saw chain cuts the rock stratum, and the main machine slides on the track in the cutting process until the rock stratum is cut off, so that the construction efficiency can be obviously improved.

However, when the rope saw method is used for constructing the communication channel, the track and the host machine need to be arranged in the subway tunnel, and the space of the subway tunnel is narrow and small, so that the requirement for splicing the track is difficult, the position of the host machine needs to be frequently adjusted and the length of the rope saw chain needs to be adjusted in the cutting process, a large amount of time is wasted, and the construction efficiency is further influenced.

Disclosure of Invention

In order to solve the problems, the application provides a construction method of a connection channel in a hard rock stratum.

The construction method for the contact channel in the hard rock stratum adopts the following technical scheme:

a construction method of a connecting channel in a hard rock stratum is characterized in that the connecting channel is excavated in sections, and the construction method comprises the following steps:

s1, drilling a plurality of first drill holes at intervals along the section contour line of the communication channel, drilling a plurality of second drill holes in the section contour line, wherein the drilling depths of the first drill holes and the second drill holes are matched with the length of a single-section track of the rope saw;

s2, cutting the rock between the adjacent first drill holes from outside to inside by using the rope saw to form a first cutting seam, cutting the rock between the adjacent second drill holes from outside to inside by using the rope saw to form a second cutting seam, and cutting the rock between the first drill holes and the second drill holes from outside to inside by using the rope saw to form a third cutting seam;

s3, cutting off the rock columns formed after being cut by the rope saw one by using a cutting device, and then taking out the rock columns;

s4, cleaning rock ballast;

s5, repeating the steps S1-S4 until the first drill hole and the second drill hole penetrate through the tunnel on the other side of the communication channel; then, cutting the communication channel in different areas by using a wire saw, and then taking down the rock column;

s6, trimming the side wall and the arch wall of the communication channel;

s7, installing an arch wall steel frame, a reinforcing steel mesh and steel frame longitudinal connecting reinforcing steel bars in the connection channel, and then spraying primary concrete to finish the excavation of the connection channel.

Through adopting above-mentioned technical scheme, utilize the rope saw to cut from section outside-in, recycle cutting device and will be cut off by the rock post that forms after the rope saw cutting one by one to can directly take out the rock post from the stratum, realize the segmental excavation to the contact passageway, thereby need not to continue to connect the track when arranging the rope saw, also need not frequently to adjust the length of first rope saw chain, improved the efficiency of construction greatly. And the rock column formed after cutting is relatively kept complete, can be recycled, and has higher economic value.

Preferably, the rope saw comprises a rail and a main machine installed on the rail, and the main machine is provided with a rope saw device, a first driving assembly driving the rope saw device to move in the vertical direction and a second driving assembly driving the rope saw device to rotate.

Through adopting above-mentioned technical scheme, because of first drilling along the section contour line of contact passageway bores and establishes, the second drilling is bored in section contour line inside and is established, consequently divides the in-process that the region cut with the section of contact passageway, needs the position of frequent adjustment rope saw device, for this reason, through setting up first drive assembly and second drive assembly, conveniently adjusts the height and the cutting angle of rope saw device to be favorable to improving cutting efficiency.

Preferably, the rope saw device includes first rope saw chain and orders about first rope saw chain pivoted actuating mechanism, actuating mechanism includes the mounting box, sets up drive wheel and two on the mounting box from the driving wheel, and two distribute respectively in the upper and lower both sides of drive wheel from the driving wheel, it is connected with the guide arm from the driving wheel, the guide arm is kept away from the one end from the driving wheel and is provided with the reverse wheel, first rope saw chain cup joints at the drive wheel, follows the driving wheel and between the reverse wheel.

Through adopting above-mentioned technical scheme, when the rock between the adjacent first drilling of cutting, adjust the position of rope saw device earlier, insert two guide arms respectively in two first drilling that correspond, actuating mechanism operates and drives first rope saw chain rotation after that, and first rope saw chain is at the rotation in-process cutting rock stratum, and the host computer moves forward on the track automatically according to the cutting speed of first rope saw chain, and when the positioning wheel removed to the bottom of first drilling after, the completion was once cut. Similarly, the cutting process of the rock between adjacent second drill holes, the cutting process of the rock between the first drill hole and the second drill hole is identical to the above-mentioned cutting process, and will not be described herein again.

Preferably, the driving mechanism further includes two tensioning wheels, the tensioning wheels are disposed between the driving wheel and the driven wheel, the two tensioning wheels are respectively disposed on the upper side and the lower side of the driving wheel, the first rope saw chain bypasses between the two tensioning wheels, and the mounting box is provided with a first driving part for driving the two driven wheels to move in the opposite or back-to-back direction and a second driving part for driving the two tensioning wheels to move in the opposite or back-to-back direction.

By adopting the technical scheme, a plurality of influence factors exist in the actual drilling process, so that the distance between the adjacent first drill holes, the distance between the adjacent second drill holes and the distance between the first drill holes and the second drill holes are difficult to keep consistent. Therefore, improve cutting efficiency, through at the drive wheel with from setting up the take-up pulley between the driving wheel to adjust two distances from the driving wheel through first drive disk assembly, through the distance between two take-up pulleys of second drive disk assembly adjustment, make under the prerequisite of first rope saw chain holding tensioning, can change the distance between two guide arms in the certain limit, thereby conveniently cut the stratum, be favorable to improving the efficiency of construction. And because the two driven wheels move towards the opposite or back-to-back directions, the distance between the guide rod and the driving wheel cannot be changed, so that the drilling depth of the first drilling hole and the second drilling hole is adapted.

Preferably, the first driving part and the second driving part have the same structure, the first driving part comprises a bidirectional threaded rod and a first driving part driving the bidirectional threaded rod to rotate, two ends of the bidirectional threaded rod with opposite thread turning directions are both in threaded connection with fixed blocks, the outer wall of the mounting box is fixedly connected with two parallel guide strips, the guide strips are vertically arranged, the fixed blocks are arranged between the two guide strips in a sliding manner, and the driven wheels are arranged on the fixed blocks; one end of the guide rod is fixedly connected with a fixed block positioned on the first driving part.

Through adopting above-mentioned technical scheme, first driving piece orders about two-way threaded rod and rotates, and two gibs blocks play the guide effect to the fixed block to make two fixed blocks move towards the direction that is close to each other or keeps away from each other, and then change two distances from between the driving wheel. Similarly, the distance between the two tension wheels is changed through the second driving part, so that the distance between the two guide rods can be changed under the condition that the first rope saw chain is kept tensioned, and rock strata can be cut.

Preferably, one end, far away from the fixed block, of the guide rod is fixedly connected with a guide ring, the outer diameter of the guide ring is matched with the aperture of the first drilling hole and the aperture of the second drilling hole, and the diameter of the reversing wheel is smaller than the inner diameter of the guide ring.

By adopting the technical scheme, the guide ring plays a role in guiding the guide rod, so that the guide rod is stably and gradually inserted into the first drilling hole or the second drilling hole.

Preferably, the cutting device comprises a drawing component for drawing the second rope saw chain and a winding component for winding the second rope saw chain, the drawing component comprises a screw and a second driving piece for driving the screw to rotate, a sleeve is sleeved on the screw, the screw is in threaded connection with the sleeve, the outer diameter of the sleeve is smaller than the aperture of the first drilling hole and the aperture of the second drilling hole, and the end part of the sleeve is fixedly connected with a conical part; the screw is provided with a third driving assembly for driving the sleeve to rotate relative to the screw; the winding assembly comprises a winding drum and a third driving piece for driving the winding drum to rotate, the outer diameter of the winding drum is smaller than the aperture of the first drilling hole and the aperture of the second drilling hole, one end of the second rope saw chain is wound on the sleeve, and the other end of the second rope saw chain is wound on the winding drum.

Through adopting above-mentioned technical scheme, when needing to be cut off by the rock post that the rope saw cutting back formed, to take the rock post at section middle part as the example, insert corresponding second drilling respectively with sleeve and reel, then wind the second rope saw chain on the rock post, order about the sleeve through third drive assembly and rotate in order to strain the second rope saw chain. Then the second driving part drives the screw rod and the sleeve to synchronously rotate so as to pull the second rope saw chain, meanwhile, the third driving part drives the winding drum to rotate so as to loosen the second rope saw chain, during cutting, the winding assembly and the pulling assembly periodically drive the winding drum and the sleeve to rotate positively and negatively, and the second rope saw chain cuts a rock stratum in the high-speed moving process. Simultaneously, according to the cutting speed of second rope saw chain, in time order about the relative screw rod of sleeve and rotate through third drive assembly, because the existence of toper portion for the sleeve possesses the drilling function, thereby makes the relative screw rod that the sleeve can be smooth rotate, and then can change the length of second rope saw chain cutting section, makes second rope saw chain keep the tensioning, guarantees cutting device's cutting efficiency with this.

Preferably the third drive assembly comprises a fixed plate fixed on the rotating rod in a sleeved mode, the fixed plate is provided with the rotating rod and a fourth drive part driving the rotating rod to rotate, the rotating rod is parallel to the sleeve, a gear is fixed on the rotating rod, a gear ring is fixedly sleeved on the sleeve and meshed with the gear, and the thickness of the gear ring is larger than that of the gear.

Through adopting above-mentioned technical scheme, when needs tensioning second rope saw chain, the fourth drive spare orders about the bull stick and rotates, and the bull stick rotates and drives the gear rotation, thereby ring gear and gear engagement transmission drive sleeve are to the bull stick rotation relatively to this tensioning diamond cluster rope.

Drawings

FIG. 1 is a schematic illustration of the drilling of a first borehole, a second borehole in the present application;

FIG. 2 is a schematic view of the construction of the wire saw machine of the present application;

FIG. 3 is a schematic view of the construction of the wire saw apparatus of the present application;

fig. 4 is a schematic structural diagram of a cutting device in the present application.

Description of reference numerals:

1. a first bore hole; 2. a second bore hole; 3. a first cutting seam; 4. a second cutting seam; 5. a third cutting seam; 6. a track; 7. a host; 8. a wire saw device; 81. mounting a box; 82. a first rope saw chain; 83. a drive mechanism; 831. a drive wheel; 832. a tension wheel; 833. a driven wheel; 834. a guide bar; 835. a reversing wheel; 836. a guide ring; 84. a first drive member; 841. a bidirectional threaded rod; 842. a third motor; 843. a fixed block; 844. a guide strip; 85. a second drive member; 9. a first drive assembly; 91. a first motor; 92. a reciprocating screw rod; 93. a movable seat; 94. a limiting strip; 10. a second motor; 11. a second rope saw chain; 12. a drawing assembly; 121. a fixed seat; 122. a screw; 123. a fourth motor; 124. a sleeve; 125. a tapered portion; 13. a winding component; 131. a mounting seat; 132. a reel; 133. a fifth motor; 14. a third drive assembly; 141. a fixing plate; 142. a rotating rod; 143. a sixth motor; 144. a gear; 145. a ring gear.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a construction method of an interconnection channel in a hard rock stratum, which is used for excavating the interconnection channel in sections and comprises the following steps:

s1, referring to fig. 1, after the position of the communication channel is determined, a plurality of first drill holes 1 are drilled at intervals along the cross-sectional contour line of the communication channel by a drilling machine, and a plurality of second drill holes 2 are drilled inside the cross-sectional contour line of the communication channel.

Specifically, the first drill holes 1 at the arched contour line of the communication channel are arranged densely relatively, the first drill holes 1 and the second drill holes 2 at the rectangular contour line of the communication channel are drilled transversely and longitudinally, and the drilling depth of the first drill holes 1 and the drilling depth of the second drill holes 2 are matched with the length of the single track 6 of the rope sawing machine, so that the cross section of the communication channel can be cut in different areas in the subsequent process.

S2, referring to fig. 1, the first cutting seam 3 is formed by cutting the rock between the adjacent first drill holes 1 from outside to inside by the wire saw, the second cutting seam 4 is formed by cutting the rock between the adjacent second drill holes 2 from outside to inside by the wire saw, and the third cutting seam 5 is formed by cutting the rock between the first drill holes 1 and the second drill holes 2 from outside to inside by the wire saw. During the cutting process, water is needed to cool the first wire saw chain 82.

Referring to fig. 2, the wire saw includes a rail 6 and a main machine 7 disposed on the rail 6, and the main machine 7 is provided with a wire saw device 8, a first driving assembly 9 for driving the wire saw device 8 to move in a vertical direction, and a second driving assembly for driving the wire saw device 8 to rotate.

Referring to fig. 2, the first driving assembly 9 includes a first motor 91 mounted on a side wall of the housing of the main unit 7, an output shaft of the first motor 91 is coaxially and fixedly connected with a reciprocating screw rod 92, and the reciprocating screw rod 92 is vertically arranged. The reciprocating screw 92 is provided with a screw nut (not shown) which is used in cooperation with the reciprocating screw, and a movable base 93 is fixedly sleeved on the screw nut. Host computer 7 is provided with two spacing strips 94 of one side fixedly connected with of first motor 91, and two spacing strips 94 are vertical relative setting, remove seat 93 sliding connection between two spacing strips 94.

The second drive assembly comprises a second motor 10 mounted on the mobile seat 93, the rope saw device 8 being connected to the output shaft of the second motor 10. Through setting up first drive assembly 9 and second drive assembly, conveniently adjust the height and the cutting angle of rope saw device 8 to conveniently cut the stratum, be favorable to providing cutting efficiency.

The rope saw device 8 comprises a mounting box 81 fixedly connected with an output shaft of the second motor 10, a first rope saw chain 82 and a driving mechanism 83 driving the first rope saw chain 82 to rotate are arranged on one side of the mounting box 81, and the first rope saw chain 82 adopts a diamond bead string rope.

Referring to fig. 3, the driving mechanism 83 includes a driving wheel 831 mounted on one side of the mounting case 81, two tension wheels 832, and two driven wheels 833, and a power source of the driving wheel 831 is disposed in the mounting case 81. The two tension pulleys 832 are respectively positioned at the upper side and the lower side of the driving wheel 831, the two driven wheels 833 are respectively positioned at the upper side and the lower side of the driving wheel 831, and the two tension pulleys 832 are positioned between the driving wheel 831 and the driven wheels 833. A guide rod 834 is connected to each of the two driven wheels 833, the guide rod 834 is horizontally arranged, and one end of the guide rod 834, which is far away from the driven wheels 833, extends in a direction away from the driving wheels 831 and is provided with a reversing wheel 835 and a guide ring 836. The reversing wheel 835 is located between the driven wheel 833 and the guide ring 836, the diameter of the reversing wheel 835 is smaller than the inner diameter of the guide ring 836, and the outer diameter of the guide ring 836 matches the bore diameters of the first bore hole 1 and the second bore hole 2. The first wire saw chain 82 is wound around the drive wheel 831, the tension wheel 832, the driven wheel 833 and the reversing wheel 835, and the first wire saw chain 82 passes under the tension wheel 832 and then passes over the driven wheel 833.

When cutting rock strata, taking the rock strata between the first drill holes 1 as an example, the main machine 7 and the guide rail are arranged at corresponding positions, then the height and the cutting angle of the rope saw device 8 are adjusted through the first driving component 9 and the second driving component, then the two guide rings 836 are inserted into the corresponding two first drill holes 1 until the first rope saw chain 82 abuts against the rock strata, then the driving wheel 831 operates to drive the first rope saw chain 82 to rotate, and the first rope saw chain 82 cuts the rock strata in the high-speed moving process. According to the cutting speed of the first wire saw chain 82, the main machine 7 automatically moves forwards on the guide rail according to the corresponding speed, so that the first wire saw chain 82 continuously cuts the rock stratum. When the guide ring 836 moves to abut against the bottom of the first drilled hole 1, the main body 7 is reset to complete one cutting, thereby forming the first cutting slit 3. Similarly, the forming process of the second cutting slit 4 and the third cutting slit 5 is substantially the same as the forming process of the first cutting slit 3, and will not be described herein again.

Referring to fig. 3, in an actual drilling process, under the influence of many factors, the distance between adjacent first drill holes 1, the distance between adjacent second drill holes 2, and the distance between the first drill hole 1 and the second drill hole 2 are difficult to be kept consistent, so that a first driving component 84 for driving two driven wheels 833 to move in the opposite or reverse direction and a second driving component 85 for driving two tension wheels 832 to move in the opposite or reverse direction are arranged on the mounting box 81, so that the distance between the two guide rods 834 can be changed within a certain range under the condition that the first rope saw chain 82 is kept tensioned, and further rock strata are conveniently cut.

Referring to fig. 3, in particular, the first driving member 84 includes a bidirectional threaded rod 841 and a first driving member that drives the bidirectional threaded rod 841 to rotate. The first driving piece is a third motor 842, the third motor 842 is installed on one side of the mounting box 81, which is provided with a driven wheel 833, and an output shaft of the third motor 842 is coaxially and fixedly connected with a bidirectional threaded rod 841. The bidirectional threaded rod 841 is vertically arranged, and the two opposite ends of the bidirectional threaded rod 841 in the rotating direction are in threaded connection with fixed blocks 843. One side of the mounting box 81, which is provided with the third motor 842, is fixedly connected with two guide bars 844 parallel to each other, the guide bars 844 are vertically arranged, and the fixing block 843 is slidably connected between the two guide bars 844. The fixed block 843 deviates from the vertical fixed connection of one side of the mounting box 81 and is connected with a fixed rod, and the driven wheel 833 is rotatably sleeved on the fixed rod. The end of the guide 834 remote from the guide ring 836 is fixedly connected to the fixing rod.

The structure of the second drive member 85 corresponds to the structure of the first drive member 84 and will not be described in detail here.

When the distance between the two guide rods 834 needs to be adjusted to fit the distance between the drilled holes, the first driving member 84 drives the two driven wheels 833 to move toward or away from each other, and the second driving member 85 correspondingly drives the two tension wheels 832 to loosen or tension the first wire saw chain 82.

And S4, cutting off the rock columns formed after being cut by the rope saw one by using a cutting device, and watering to cool the second rope saw chain 11 in the cutting process. The cutting sequence of rock pillar is from top to bottom to ensure construction safety. And after cutting, taking out the rock column by using the hydraulic cylinder, and then carrying away the rock column by using a transport vehicle. Because the rock column is kept relatively intact, the rock column can be recycled, and has higher economic value.

Referring to fig. 4, in particular, the cutting device comprises a drawing component 12 for drawing the second wire saw chain 11 and a rolling component 13 for rolling the second wire saw chain 11, wherein the second wire saw chain 11 adopts a diamond bead string rope.

Referring to fig. 4, the drawing assembly 12 includes a fixing base 121 and a screw 122 disposed on the fixing base 121, and a second driving member disposed on the fixing base 121 for driving the screw 122 to rotate. The second driving element is a fourth motor 123 installed on the fixing base 121, and one end of the screw 122 penetrates through the fixing base 121 and is fixedly connected with an output shaft of the fourth motor 123. A sleeve 124 is sleeved on the screw 122, the sleeve 124 is provided with internal threads, and the screw 122 is in threaded connection with the sleeve 124. The outer diameter of the sleeve 124 is smaller than the diameters of the first bore hole 1 and the second bore hole 2, and a tapered portion 125 is fixedly connected to one end of the sleeve 124 away from the fixing seat 121. The tapered portion 125 is formed of a plurality of arcuate segments circumferentially distributed about the axis of the sleeve 124. The screw 122 is provided with a third drive assembly 14 for driving the sleeve 124 in rotation relative to the screw 122.

Referring to fig. 4, the winding device includes a mounting seat 131 and a winding drum 132 disposed on the mounting seat 131, a third driving member is disposed on the mounting seat 131 for driving the winding drum 132 to rotate, an outer diameter of the winding drum 132 is identical to an outer diameter of the sleeve 124, and a length of the winding drum 132 is smaller than a length of the sleeve 124. The third driving element is a fifth motor 133 installed on one side of the installation seat 131, and one end of the winding drum 132 penetrates through the installation seat 131 and is coaxially and fixedly connected with an output shaft of the fifth motor 133. One end of the second wire saw chain 11 is wound around the sleeve 124, and the other end of the second wire saw chain 11 is wound around the winding drum 132.

When cutting the rock pillar, the rock pillar in the middle of the cross section of the communication channel is cut. And respectively fixing the mounting seat 131 and the fixing seat 121 by building a bracket with a proper height in the tunnel. The sleeve 124 and the drum 132 are then inserted into the corresponding second borehole 2, respectively, and the second rope saw chain 11 is then slipped over the rock string. The sleeve 124 is driven to rotate by the third drive assembly 14 to tension the second wire saw chain 11. Then, the sleeve 124 and the winding drum 132 are periodically controlled to rotate forward and backward by the fourth motor 123 and the fifth motor 133, and the second rope saw chain 11 moves at a high speed in the process so as to cut the rock pillar. During the cutting process, the third driving assembly 14 periodically drives the sleeve 124 to rotate relative to the rotating rod 142 according to the cutting speed of the second rope saw chain 11, so as to gradually shorten the length of the cutting section of the second rope saw chain 11, so that the second rope saw chain 11 is always tensioned, thereby improving the cutting efficiency. In the process, the sleeve 124 can easily rotate relative to the rotating rod 142 due to the existence of the tapered portion 125, which enables the sleeve 124 to have a drilling function. The cutting process of the rock pillar at other positions is consistent with the cutting process, and the description is omitted here.

Referring to fig. 2, in detail, the third driving assembly 14 includes a fixing plate 141 fixed to one end of the screw 122 close to the fourth motor 123 in a sleeved manner, and the fixing plate 141 is provided with a rotating rod 142 and a fourth driving member for driving the rotating rod 142 to rotate. The fourth driving element is a sixth motor 143 mounted on the fixing plate 141, and the sixth motor 143 is a motor with a battery. The axis of the rotating rod 142 is parallel to the axis of the sleeve 124, one end of the rotating rod 142 is fixedly connected with the output shaft of the sixth motor 143, the other end of the rotating rod 142 is fixedly connected with a gear 144, one end of the sleeve 124, which is close to the fixed seat 121, is fixedly sleeved with a gear ring 145, the gear ring 145 is in meshing transmission with the gear 144, and the thickness of the gear ring 145 is greater than that of the gear 144. The sixth motor 143 rotates the rotary rod 142, the gear 144 engages with the gear ring 145 to drive the sleeve 124 to rotate relative to the screw 122, and the gear 144 engages with the gear ring 145 during the movement of the sleeve 124 along the axial direction of the sleeve because the thickness of the gear ring 145 is greater than that of the gear 144.

And S4, cleaning rock debris.

S5, repeating the steps S1-S4 until the first bore 1 and the second bore 2 penetrate the other side of the tunnel of the communication channel. And then, cutting the communication channel in different areas by using a wire saw, and then taking the rock column down.

S6, trimming the side wall and the arch wall of the communication channel.

S7, installing an arch wall steel frame, a reinforcing steel mesh and steel frame longitudinal connecting reinforcing steel bars in the connection channel, and then spraying primary concrete to finish the excavation of the connection channel.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A construction method of a contact channel in a hard rock stratum is characterized by comprising the following steps: excavating the communication channel in sections, comprising the following steps:

s1, drilling a plurality of first drill holes (1) at intervals along the section contour line of the communication channel, drilling a plurality of second drill holes (2) in the section contour line, wherein the drilling depths of the first drill holes (1) and the second drill holes (2) are matched with the length of a single-section track (6) of the wire saw;

s2, cutting rocks between the adjacent first drill holes (1) from outside to inside by using the rope saw to form first cutting seams (3), cutting rocks between the adjacent second drill holes (2) from outside to inside by using the rope saw to form second cutting seams (4), and cutting rocks between the first drill holes (1) and the second drill holes (2) from outside to inside by using the rope saw to form third cutting seams (5);

s3, cutting off the rock columns formed after being cut by the rope saw one by using a cutting device, and then taking out the rock columns;

s4, cleaning rock ballast;

s5, repeating the steps S1-S4 until the first drilling hole (1) and the second drilling hole (2) penetrate through the tunnel on the other side of the communication channel; then, cutting the communication channel in different areas by using a wire saw, and then taking down the rock column;

s6, trimming the side wall and the arch wall of the communication channel;

s7, installing an arch wall steel frame, a reinforcing steel mesh and steel frame longitudinal connecting reinforcing steel bars in the connection channel, and then spraying primary concrete to finish the excavation of the connection channel.

2. The method of claim 1, wherein the method comprises the steps of: the rope saw comprises a rail (6) and a host (7) installed on the rail (6), wherein the host (7) is provided with a rope saw device (8), a first driving component (9) driving the rope saw device (8) to move along the vertical direction, and a second driving component driving the rope saw device (8) to rotate.

3. The method for constructing a hard in-rock communication passage according to claim 2, wherein: rope saw device (8) include first rope saw chain (82) and order about first rope saw chain (82) pivoted actuating mechanism (83), actuating mechanism (83) include mounting box (81), set up drive wheel (831) and two on mounting box (81) from driving wheel (833), and two are followed driving wheel (833) and are distributed respectively in the upper and lower both sides of drive wheel (831) from driving wheel (833), follow driving wheel (833) and be connected with guide arm (834), the one end that follows driving wheel (833) is kept away from in guide arm (834) is provided with reverse wheel (835), first rope saw chain (82) cup joint between drive wheel (831), follow driving wheel (833) and reverse wheel (835).

4. The method of claim 3, wherein the method comprises the steps of: the driving mechanism (83) further comprises two tension pulleys (832), the tension pulleys (832) are arranged between the driving wheel (831) and the driven wheel (833), the two tension pulleys (832) are respectively distributed on the upper side and the lower side of the driving wheel (831), the first rope saw chain (82) bypasses between the two tension pulleys (832), and a first driving component (84) for driving the two driven wheels (833) to move towards the opposite direction or the back-to-back direction and a second driving component (85) for driving the two tension pulleys (832) to move towards the opposite direction or the back-to-back direction are arranged on the mounting box (81).

5. The method of claim 4, wherein the method comprises the steps of: the structure of the first driving component (84) is consistent with that of the second driving component (85), the first driving component (84) comprises a bidirectional threaded rod (841) and a first driving piece driving the bidirectional threaded rod (841) to rotate, two ends, opposite in thread rotation direction, of the bidirectional threaded rod (841) are in threaded connection with fixing blocks (843), the outer wall of the mounting box (81) is fixedly connected with two guide strips (844) which are parallel to each other, the guide strips (844) are vertically arranged, the fixing blocks (843) are arranged between the two guide strips (844) in a sliding mode, and the driven wheels (833) are arranged on the fixing blocks (843); one end of the guide rod (834) is fixedly connected with a fixed block (843) positioned on the first driving part (84).

6. The method for constructing the interconnecting channel in the hard rock stratum according to claim 5, wherein: one end fixedly connected with guide ring (836) of fixed block (843) is kept away from in guide arm (834), the external diameter and the aperture adaptation of first drilling (1), second drilling (2) of guide ring (836), the diameter of switching-over wheel (835) is less than the internal diameter of guide ring (836).

7. The method of claim 1, wherein the method comprises the steps of: the cutting device comprises a drawing component (12) for drawing the second rope saw chain (11) and a rolling component (13) for rolling the second rope saw chain (11), the drawing component (12) comprises a screw rod (122) and a second driving piece for driving the screw rod (122) to rotate, a sleeve (124) is sleeved on the screw rod (122), the screw rod (122) is in threaded connection with the sleeve (124), the outer diameter of the sleeve (124) is smaller than the aperture of the first drilling hole (1) and the aperture of the second drilling hole (2), and a conical part (125) is fixedly connected to the end part of the sleeve (124); the screw rod (122) is provided with a third driving component (14) which drives the sleeve (124) to rotate relative to the screw rod (122);

the winding assembly (13) comprises a winding drum (132) and a third driving piece for driving the winding drum (132) to rotate, the outer diameter of the winding drum (132) is smaller than the aperture of the first drilling hole (1) and the aperture of the second drilling hole (2), one end of the second rope saw chain (11) is wound on the sleeve (124), and the other end of the second rope saw chain (11) is wound on the winding drum (132).

8. The method for constructing a hard in-rock communication passage according to claim 7, wherein: the third driving assembly (14) comprises a fixing plate (141) which is fixedly sleeved on a rotating rod (142), the fixing plate (141) is provided with the rotating rod (142) and a fourth driving piece which drives the rotating rod (142) to rotate, the rotating rod (142) is parallel to a sleeve (124), a gear (144) is fixed on the rotating rod (142), a gear ring (145) is fixedly sleeved on the sleeve (124), the gear ring (145) is meshed with the gear (144), and the thickness of the gear ring (145) is larger than that of the gear (144).

Images