CN110005452B - Quick installation system and installation method for pilot tunnel supporting arch centering - Google Patents
Quick installation system and installation method for pilot tunnel supporting arch centering Download PDFInfo
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- CN110005452B CN110005452B CN201910357695.1A CN201910357695A CN110005452B CN 110005452 B CN110005452 B CN 110005452B CN 201910357695 A CN201910357695 A CN 201910357695A CN 110005452 B CN110005452 B CN 110005452B
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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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a rapid installation system and a rapid installation method for a pilot tunnel supporting arch frame, wherein a traction system, a supporting system, a traveling system and a pushing system are added on the basis of the existing tunnel excavation trolley, the arch frame is integrally assembled on the ground, the traction system is integrally pulled and erected, the supporting system temporarily supports the arch frame, the arch frame is moved in place through the traveling system, the arch frame is installed and fixed through the hydraulic pushing system, the construction mechanization degree is high, a large amount of manpower can be saved, the construction efficiency is greatly improved, the safety risk is reduced, and the connection firmness degree and the installation precision of the supporting arch frame are ensured. The invention is especially suitable for IV-level and V-level weak surrounding rock tunnel pilot pit support construction.
Description
Technical Field
The invention belongs to the technical field of tunnel excavation and support, and particularly relates to a tunnel pilot pit support arch frame installation system and a tunnel pilot pit support arch frame installation method, which are used for rapidly installing a single-side wall and a double-side wall pilot pit steel arch frame under IV-level and V-level weak surrounding rocks of a tunnel.
Background
In tunnel excavation construction, supporting the side wall of an excavated pilot tunnel by adopting an arch frame in time is a key process of tunnel construction so as to prevent tunnel collapse. Fig. 1 is a schematic diagram of a tunnel excavation pilot pit structure, a supporting arch frame is installed on the side wall of an excavation pilot pit 102 of a tunnel 100, a pilot pit primary supporting arch frame 102 is installed on the left side wall of the pilot pit in fig. 1, and a pilot pit temporary supporting arch frame 103 is installed on the right side. Tunnel excavation is typically performed using an excavation trolley 104, with the support arch being installed typically with the aid of the tunnel excavation trolley. The tunnel excavation trolley is characterized in that an upper platform, a middle platform and a lower platform are respectively arranged on two sides of the tunnel excavation trolley, and constructors perform arch centering installation construction on the platforms.
The supporting arch frame is usually made of I-steel, the weight is heavy, the existing arch frame installation method mainly uses manpower to carry to a designated position, and then the supporting arch frame is pushed to the side wall of the pilot tunnel by the manpower to be installed and fixed, so that the labor intensity is high, and the construction efficiency is low. Particularly, IV-level and V-level weak surrounding rock supporting parameters of the extra-large section tunnel are high, large I-shaped steel arches are adopted, the model and the specification are high (I22-I25I-shaped steel is adopted), the length of a single component is long (3.5-5.1 m), the weight of the single component is heavy (127-220 Kg), supporting team personnel need to be increased in multiple, but the construction efficiency still cannot be effectively improved, and the tunnel collapse risk caused by the fact that the supporting cannot be closed in time is greatly increased.
Disclosure of Invention
The invention aims to solve the problems of high labor intensity and low construction efficiency caused by the fact that the existing tunnel pilot tunnel supporting arch frame is mainly installed by manpower, and provides a system and a method for quickly installing the pilot tunnel supporting arch frame, so that the arch frame installation and construction efficiency is improved, and the tunnel collapse risk is avoided.
In order to achieve the above purpose, the invention provides a rapid installation system of a pilot tunnel supporting arch frame, which comprises a tunnel excavation trolley, wherein the tunnel excavation trolley comprises two rows of lower upright posts which are arranged in parallel, the outer side of each lower upright post is connected with a cross rod and an inclined strut to form a triangular bracket, and a panel is paved on the cross rod connected with each row of lower upright posts to form a lower platform; the upper ends of the two rows of lower upright posts are connected through a lower cross beam, two ends of the lower cross beam extend out of the outer sides of the lower upright posts by a certain length, the middle part of the lower cross beam supports two upper upright posts, and a panel is paved at the position, located at the outer sides of the two upper upright posts, on the lower cross beam to form a middle platform; the upper ends of the two upper upright posts are connected through an upper cross beam, and a panel is paved on the upper cross beam to form an upper platform;
the traction system comprises a winch arranged on the upper platform of the tunnel excavation trolley;
the support system comprises a transverse support system, a vertical support system and a bracket system; the transverse supporting system comprises two transverse supporting rods, the two transverse supporting rods are respectively arranged on the outer sides of the lower ends of two lower upright posts at the rear end of the tunnel excavation trolley, one end of each transverse supporting rod is rotatably connected with the lower upright post through a pin shaft, the other end of each transverse supporting rod is connected with a chain block, and the chain block is hung below a cross rod at the rear end of the tunnel excavation trolley; the vertical supporting system comprises a vertical supporting rod, the lower end of the vertical supporting rod is rotatably connected with the inner side of the lower end of a lower upright post at the rear end of the tunnel excavation trolley through a rotating shaft, and the upper end of the vertical supporting rod is higher than the top of a winch arranged on an upper platform of the tunnel excavation trolley and is connected with a traction rope of the winch; the bracket system comprises a pilot pit primary support arch bracket and a pilot pit temporary support arch bracket which are respectively arranged at two sides of a tunnel excavation trolley, wherein the pilot pit primary support arch bracket is I-steel with the radian identical to that of the pilot pit primary support arch bracket, the pilot pit temporary support arch bracket is I-steel with the radian identical to that of the pilot pit temporary support arch bracket, the lower ends of the pilot pit primary support arch bracket and the pilot pit temporary support arch bracket are respectively supported on the two transverse support rods, and the upper ends of the pilot pit primary support arch bracket and the pilot pit temporary support arch bracket are respectively connected with the upper ends of the vertical support rods through pin shafts;
the traveling system comprises a plurality of traveling pulleys, each traveling pulley comprises a horizontally arranged supporting beam, two ends of the bottom of each supporting beam are respectively welded with one supporting leg, the bottom of each supporting leg is provided with a pulley traveling wheel, the middle of the top of each supporting beam is welded with the lower end of a vertically arranged supporting screw rod, the upper end of each supporting screw rod penetrates through a horizontal supporting plate, two sides of each horizontal supporting plate are respectively welded with a vertical supporting plate, and a control nut is screwed on each supporting screw rod at the bottom surface of each horizontal supporting plate; a trolley traveling rail is respectively paved on an upper platform, a middle platform and a lower platform of the tunnel excavation trolley along the longitudinal direction of the trolley, each movable trolley is arranged on an upper platform, a middle platform or a lower platform of the tunnel excavation trolley, trolley traveling wheels of the movable trolley are supported on the trolley traveling rail, and a horizontal support plate and a vertical support plate of each movable trolley are welded with a pilot pit primary support arch bracket or a pilot pit temporary support arch bracket;
the pushing system comprises a plurality of hydraulic pushing devices, each hydraulic pushing device comprises a base, two rollers are respectively arranged on two sides of the bottom of the base, an oblique oil cylinder is arranged on one side of the top surface of the base, the rear end of the oblique oil cylinder is connected with the base through a pin shaft, the front end of the oblique oil cylinder faces the outer side of the trolley and is provided with an arch centering fixing device, and a connecting plate is welded at the bottom of the outer wall of the front end of the oblique oil cylinder; the other side of the top surface of the base is provided with a vertical oil cylinder, the lower end of the vertical oil cylinder is connected with the base through a pin shaft, and the upper end of the vertical oil cylinder is supported at the upper end of the inclined oil cylinder and is connected with a connecting plate at the bottom of the front end of the inclined oil cylinder through a pin shaft; two hydraulic pushing device guide rails are respectively arranged on the lower platform, the middle platform and the upper platform of the tunnel excavation trolley, each hydraulic pushing device is arranged on the lower platform, the middle platform or the upper platform of the tunnel excavation trolley, and rollers on two sides of the bottom of the base are respectively supported on the two hydraulic pushing device guide rails.
The invention also provides a method for installing the pilot pit supporting arch frame by adopting the quick installing system for the pilot pit supporting arch frame, which is characterized in that:
(1) Releasing the connecting pin shaft at the upper end of the arch support bracket of the pilot tunnel primary support and the vertical support rod; rotating a control nut on the moving pulley connected with the pilot tunnel temporary support arch bracket to enable a pulley travelling wheel at the bottom of the moving pulley to ascend and leave a pulley travelling rail; loosening a traction rope of a winch, enabling the vertical supporting rod to rotate around a rotating shaft at the lower end of the vertical supporting rod to the rear of the tunnel excavation trolley, and driving the pilot pit temporary supporting arch bracket to be laid on the ground;
(2) Assembling a pilot tunnel temporary support arch on the ground, and binding the pilot tunnel temporary support arch with a pilot tunnel temporary support arch bracket;
(3) Starting a winch to tighten the traction rope, and dragging the vertical support rod, the pilot tunnel temporary support arch bracket and the pilot tunnel temporary support arch bound with the pilot tunnel temporary support arch bracket to an upright state;
(4) Rotating a control nut on a moving pulley connected with a pilot tunnel temporary support arch bracket to enable a pulley travelling wheel at the bottom of the moving pulley to descend and be supported on a pulley travelling rail; the connecting pin shafts of the pilot tunnel temporary support arch frame bracket and the vertical supporting rods are released, and meanwhile, the chain block is operated to loosen the chain block, so that one end of the transverse supporting rod for supporting the pilot tunnel temporary support arch frame bracket is lowered in height and separated from the lower end of the pilot tunnel temporary support arch frame bracket, and the pilot tunnel temporary support arch frame bracket is supported by the movable pulley completely;
(5) Pushing a pulley for supporting the temporary supporting arch frame bracket of the pilot pit to move to a preset installation position of the temporary supporting arch frame of the pilot pit, which is opposite to the side wall of the pilot pit, along a pulley walking track;
(6) Pushing the hydraulic pushing device to one side of the pilot tunnel temporary supporting arch frame, starting the vertical pushing oil cylinder to stretch and retract, and adjusting the axis of the inclined oil cylinder to be perpendicular to the axis of the pilot tunnel temporary supporting arch frame; starting an oblique pushing oil cylinder to enable the front end of the oblique pushing oil cylinder to be close to the pilot tunnel temporary supporting arch frame, and connecting and fixing an arch frame fixing device at the front end of the oblique pushing oil cylinder with the pilot tunnel temporary supporting arch frame;
(7) Removing the binding between the temporary supporting arch frame bracket of the pilot pit and the temporary supporting arch frame of the pilot pit, and pushing the movable pulley to move away the temporary supporting arch frame bracket of the pilot pit; starting an oblique pushing cylinder to push the pilot tunnel temporary supporting arch frame to the side wall of the pilot tunnel, and installing and fixing the pilot tunnel temporary supporting arch frame;
(8) Connecting a bracket of the pilot tunnel primary support arch frame with the upper end of the vertical support rod through a pin shaft, and then installing the pilot tunnel primary support arch frame according to the methods from the step (1) to the step (7);
(9) And (3) circulating the steps (1) to (8) to finish the installation of all the pilot tunnel temporary support arches and the pilot tunnel primary support arches.
According to the invention, on the basis of the existing tunnel excavation trolley, the traction system, the support system, the traveling system and the pushing system are added, the arch frame can be integrally assembled on the ground, the winch is integrally pulled and erected, the traveling system is moved in place, the hydraulic pushing system is used for installation and fixation, the steel arch frame is integrally installed and mechanically, a large amount of manpower can be saved, the construction efficiency is greatly improved, the safety risk is reduced, and the firm connection degree and the installation precision of the supporting arch frame are ensured. The invention is especially suitable for IV-level and V-level weak surrounding rock tunnel pilot pit support construction.
Drawings
Fig. 1 is a schematic structural view of a tunnel pit and a tunnel excavation carriage;
FIG. 2 is a schematic elevational view of the present invention;
FIG. 3 is a schematic side elevational view of the present invention;
FIG. 4 is a schematic side elevational view of the mobile sled;
FIG. 5 is a schematic elevational view of the mobile sled;
FIG. 6 is a schematic elevational view of a hydraulic jack system;
FIG. 7 is a schematic diagram of the front view of the arch centering fixture of the front end of the oblique cylinder of the hydraulic pushing system;
FIG. 8 is a schematic top view of an arch centering fixture of the front end of the oblique cylinder of the hydraulic jack system;
FIG. 9 is a schematic view of an arch fixing device and an arch fixing structure;
FIG. 10 is a side view of the pilot tunnel support arch quick mount system of the present invention in a use configuration;
FIG. 11 is a front elevational view of the pilot tunnel support arch quick install system of the present invention in use;
fig. 12 is a schematic view of the installation of the pilot tunnel preliminary bracing arch and the pilot tunnel temporary bracing arch.
Detailed Description
The rapid installation system of the pilot tunnel supporting arch frame is improved on the basis of the existing tunnel excavation trolley.
As shown in fig. 2 and 3, the tunnel excavation trolley comprises two rows of lower upright posts 1 which are arranged in parallel, wherein the outer side of each lower upright post 1 is connected with a cross rod 2 and an inclined strut 3 to form a triangular bracket, and a panel is paved on the cross rod 2 connected with each row of lower upright posts to form a lower platform 4; the upper ends of the two rows of lower upright posts 1 are connected through a lower cross beam 5, two ends of the lower cross beam 5 extend out of the lower upright posts 1 for a certain length, two upper upright posts 6 are supported in the middle of the lower cross beam 5, and a panel is paved at the position, located at the outer sides of the two upper upright posts, of the lower cross beam 5 to form a middle platform 7; the upper ends of the two upper upright posts are connected through an upper cross beam 8, and a panel is paved on the upper cross beam to form an upper platform 9.
The invention is provided with a traction system, a support system, a traveling system and a pushing system on the tunnel excavation trolley.
The traction system comprises a winch 10 arranged on the upper platform of the tunnel excavation trolley;
the support system comprises a transverse support system, a vertical support system and a bracket system; the transverse supporting system comprises two transverse supporting rods 11, the two transverse supporting rods 11 are respectively arranged on the outer sides of the lower ends of two lower upright posts 1 at the rear end of the tunnel excavation trolley, one end of each transverse supporting rod 11 is rotatably connected with the lower upright post 1 through a pin shaft, the other end of each transverse supporting rod is connected with a chain block 12, and the chain block 12 is hung below a cross rod 2 at the rear end of the tunnel excavation trolley; the vertical supporting system comprises a vertical supporting rod 13, wherein the lower end of the vertical supporting rod 13 is rotatably connected with the inner side of the lower end of a lower upright post 1 at the rear end of the tunnel excavation trolley through a rotating shaft 14, and the upper end of the vertical supporting rod 13 is higher than the top of a winch 10 arranged on the upper platform of the tunnel excavation trolley and is connected with a traction rope of the winch; the bracket system comprises a pilot pit primary support arch bracket 15 and a pilot pit temporary support arch bracket 16 which are respectively arranged at two sides of a tunnel excavation trolley, wherein the pilot pit primary support arch bracket 15 is an I-shaped steel with the radian identical to that of the pilot pit primary support arch bracket, the pilot pit temporary support arch bracket 16 is an I-shaped steel with the radian identical to that of the pilot pit temporary support arch bracket, the lower ends of the pilot pit primary support arch bracket 15 and the pilot pit temporary support arch bracket 16 are respectively supported on the two transverse support rods 11, and the upper ends of the pilot pit primary support arch bracket 15 and the pilot pit temporary support arch bracket 16 are respectively connected with the upper ends of the vertical support rods 13 through pin shafts;
the running system comprises a plurality of travelling blocks 17. The structure of each movable pulley is shown in fig. 4 and 5, and comprises a horizontally arranged supporting beam 171, two ends of the bottom of the supporting beam are respectively welded with a supporting leg 172, the bottom of each supporting leg is provided with a pulley travelling wheel 173, the middle of the top of the supporting beam is welded with the lower end of a vertically arranged supporting screw 174, the upper end of the supporting screw 174 penetrates through a horizontal supporting plate 175, two sides of the horizontal supporting plate 175 are respectively welded with a vertical supporting plate 176, and a control nut 177 is screwed on the supporting screw 174 and positioned at the bottom surface of the horizontal supporting plate 175.
A trolley traveling rail is respectively laid on the upper platform, the middle platform and the lower platform of the tunnel excavation trolley along the longitudinal direction of the trolley, each movable trolley is arranged on an upper platform, a middle platform or a lower platform of the tunnel excavation trolley, trolley traveling wheels 173 of the movable trolley are supported on the trolley traveling rail, and a horizontal supporting plate 175 and a vertical supporting plate 176 of each movable trolley are welded with a pilot pit primary support arch bracket 15 or a pilot pit temporary support arch bracket 16.
The control nut 177 is rotated to raise or lower the support screw 174 and drive the support beam 171 and the trolley traveling wheels 173 to raise or lower, and the trolley traveling wheels 173 are separated from or supported on the trolley traveling rail as required.
The pushing system comprises a plurality of hydraulic pushing devices 18, the structure of each hydraulic pushing device 18 is shown as 6, the pushing system comprises a base 181, two rollers 182 are respectively arranged on two sides of the bottom of the base 181, an inclined oil cylinder 183 is arranged on one side of the top surface of the base, the rear end of the inclined oil cylinder 183 is connected with the base through a pin shaft, the front end of the inclined oil cylinder faces the outer side of the trolley and is provided with an arch fixing device 184, and a connecting plate 185 is welded at the bottom of the outer wall of the front end of the inclined oil cylinder 183; the other side of the top surface of the base 181 is provided with a vertical oil cylinder 186, the lower end of the vertical oil cylinder 186 is connected with the base through a pin shaft, and the upper end of the vertical oil cylinder 186 is supported at the upper end of the inclined oil cylinder and is connected with a connecting plate 185 at the bottom of the front end of the inclined oil cylinder 183 through a pin shaft; two hydraulic pushing device guide rails are respectively arranged on the lower platform, the middle platform and the upper platform of the tunnel excavation trolley, each hydraulic pushing device 18 is arranged on the lower platform, the middle platform or the upper platform of the tunnel excavation trolley, and rollers on two sides of the bottom of the base are respectively supported on the two hydraulic pushing device guide rails.
In the implementation of the invention, the rotating shaft 14 connected between the vertical supporting rod 13 and the lower upright 1 is horizontally arranged, one end of the rotating shaft is welded at the inner side of the lower end of the lower upright 1, the other end of the rotating shaft transversely penetrates through the lower end of the vertical supporting rod 13, and the vertical supporting rod 13 can rotate around the rotating shaft 14.
The upper ends of the pilot pit primary support arch frame bracket 15 and the pilot pit temporary support arch frame bracket 16 are respectively welded with a bracket connecting plate 19, and are connected with the upper ends of the vertical support rods 13 through pin shafts by the bracket connecting plates 19.
As shown in fig. 7 and 8, the arch fixing device 184 at the front end of the oblique cylinder 183 of the hydraulic pushing device is a lock catch, the lock catch includes an L-shaped push plate 1841, two L-shaped screws 1842 and an L-shaped clamping plate 1843, the L-shaped push plate is a right angle steel, one side of the L-shaped push plate is fixedly connected with the front end of the oblique cylinder 183, two pairs of lugs 1844 are welded on the other side along the direction parallel to the axis of the oblique cylinder, each lug is provided with a screw hole, one end of each L-shaped screw 1842 is inserted into the screw hole of one pair of lugs, and two adjusting nuts 1845 are screwed to the top surface and the bottom surface of one lug 1844 to clamp; the L-shaped clamping plate 1843 is also a right-angle steel, one side of the L-shaped clamping plate is welded with the other end of the L-shaped screw 1842, and the other side of the L-shaped clamping plate faces the oblique pushing cylinder 183.
Fig. 9 is a schematic diagram of a fixing structure of an arch centering fixing device on an arch frame i-steel, taking fixing of the arch guide temporary supporting arch 103 by i-steel as an example, when a lock catch fixes the supporting arch 103, two adjusting nuts 1845 are loosened, an L-shaped screw 1842 is moved upwards, an opening between an L-shaped push plate 1841 and an L-shaped clamping plate 1843 is larger than the height of the i-steel, the opening is aligned to one side of the i-steel, a hydraulic pushing device is pushed to move to the other side of the i-steel, the i-steel is placed between the L-shaped push plate 1841 and the L-shaped clamping plate 1843, an oblique pushing oil cylinder 183 is adjusted to push upwards, the L-shaped push plate 1841 is pushed against the i-steel, then the L-shaped screw 1842 is moved downwards, the L-shaped clamping plate 1843 is also pushed against the i-steel, two adjusting nuts 1845 are screwed, the L-shaped screw 1842 is fixed, and the arch guide temporary supporting arch 103 is locked and fixed between the L-shaped push plate 1841 and the L-shaped clamping plate 1843. Starting the oblique pushing cylinder 183 to push forwards, the pilot pit temporary supporting arch 103 can be pushed to the designated position of the side wall of the pilot pit and is installed and fixed.
The rapid installation system for the pilot pit support arch frame is adopted for installing the pilot pit support arch frame, and the method comprises the following steps:
because there is the T-shaped and alternately in the pilot tunnel preliminary bracing bow member upper end and pilot tunnel temporary bracing bow member, in order to avoid the mutual interference among the installation, install pilot tunnel preliminary bracing bow member and pilot tunnel temporary bracing bow member respectively, install pilot tunnel temporary bracing bow member earlier, later install pilot tunnel preliminary bracing bow member. The method specifically comprises the following steps:
(1) As shown in fig. 10 and 11, the connecting pin shafts at the upper ends of the arch support brackets 15 and the vertical support rods 13 of the pilot pit primary support are released; rotating an adjusting nut on a moving pulley 17 connected with a pilot tunnel temporary support arch bracket 16 to enable a pulley travelling wheel at the bottom of the moving pulley to ascend and leave a pulley travelling track; loosening a traction rope 20 of the winch 10, so that the vertical supporting rod 13 rotates around a rotating shaft 14 at the lower end of the vertical supporting rod to the rear of the tunnel excavation trolley and drives the pilot pit temporary supporting arch bracket 16 to be laid on the ground;
(2) The pilot tunnel temporary support arch 103 is assembled on the ground and is bound with the pilot tunnel temporary support arch bracket 16;
(3) As shown in fig. 11, the winch 10 is started to tighten the traction rope, and the vertical support bar 13, the pilot temporary support arch bracket 16 and the pilot temporary support arch 103 bound with the pilot temporary support arch bracket are pulled together to an upright state;
(4) The adjusting nut on the moving pulley 17 connected with the pilot tunnel temporary supporting arch bracket 16 is rotated to enable the pulley travelling wheel at the bottom of the moving pulley 17 to descend and be supported on the pulley travelling rail; then the connecting pin shafts of the pilot tunnel temporary support arch bracket 16 and the vertical support rods 13 are released, and meanwhile, the chain block 12 is operated to loosen a chain block, so that one end of the transverse support rod 11 supporting the pilot tunnel temporary support arch bracket 16 is lowered in height and separated from the lower end of the pilot tunnel temporary support arch bracket, and the pilot tunnel temporary support arch bracket 16 is supported by the movable pulley 17 completely;
(5) Pushing a pulley 17 supporting a pilot tunnel temporary support arch bracket 16 to move along a pulley travelling rail to a predetermined installation position of the pilot tunnel temporary support arch on the side wall of the pilot tunnel;
(6) Pushing the hydraulic pushing device 18 to one side of the pilot tunnel temporary supporting arch frame 103, starting the vertical pushing oil cylinder to stretch and retract, and adjusting the axis of the inclined oil cylinder to be perpendicular to the axis of the pilot tunnel temporary supporting arch frame 103; starting an oblique pushing cylinder, enabling the front end of the oblique pushing cylinder to be close to the pilot tunnel temporary supporting arch, and locking and fixing an arch fixing device 184 of the oblique pushing cylinder and the pilot tunnel temporary supporting arch 103 in a mode shown in fig. 9;
(7) Unbinding the pilot temporary support arch bracket 16 and the pilot temporary support arch 103, pushing the movable pulley 17 to move away the pilot temporary support arch bracket 16; starting an oblique pushing cylinder of the hydraulic pushing device 18 to push the pilot pit temporary support arch 103 to the side wall of the pilot pit and installing and fixing the pilot pit temporary support arch;
(8) The method of installing pilot primary support arch 102 is the same as that described above for installing pilot temporary support arch 103. The connection between the pilot pit temporary support arch frame bracket 16 and the vertical supporting rod 13 is released, the pilot pit primary support arch frame bracket 15 is connected with the upper end of the vertical supporting rod 13 through a pin shaft, and then the pilot pit primary support arch frame 102 is installed according to the installation method of the pilot pit temporary support arch frame 103 in the steps (1) to (7);
(9) And (3) circulating the steps (1) to (8) until the installation of all the pilot temporary support arches 103 and the pilot primary support arches 102 is completed. The state after the completion of the installation is shown in fig. 12.
Claims (3)
1. The rapid installation system for the pilot tunnel supporting arch centering comprises a tunnel excavation trolley, wherein the tunnel excavation trolley comprises two rows of lower upright posts which are arranged in parallel, the outer side of each lower upright post is connected with a cross rod and an inclined strut to form a triangular bracket, and a panel is paved on the cross rod connected with each row of lower upright posts to form a lower platform; the upper ends of the two rows of lower upright posts are connected through a lower cross beam, two ends of the lower cross beam extend out of the outer sides of the lower upright posts by a certain length, the middle part of the lower cross beam supports two upper upright posts, and a panel is paved at the position, located at the outer sides of the two upper upright posts, on the lower cross beam to form a middle platform; the upper ends of the two upper upright posts are connected through an upper cross beam, and a panel is paved on the upper cross beam to form an upper platform;
the traction system comprises a winch arranged on the upper platform of the tunnel excavation trolley;
the support system comprises a transverse support system, a vertical support system and a bracket system; the transverse supporting system comprises two transverse supporting rods, the two transverse supporting rods are respectively arranged on the outer sides of the lower ends of two lower upright posts at the rear end of the tunnel excavation trolley, one end of each transverse supporting rod is rotatably connected with the lower upright post through a pin shaft, the other end of each transverse supporting rod is connected with a chain block, and the chain block is hung below a cross rod at the rear end of the tunnel excavation trolley; the vertical supporting system comprises a vertical supporting rod, the lower end of the vertical supporting rod is rotatably connected with the inner side of the lower end of a lower upright post at the rear end of the tunnel excavation trolley through a rotating shaft, and the upper end of the vertical supporting rod is higher than the top of a winch arranged on an upper platform of the tunnel excavation trolley and is connected with a traction rope of the winch; the rotating shaft connected between the vertical supporting rod and the lower upright post is horizontally arranged, one end of the rotating shaft is welded on the inner side of the lower end of the lower upright post, the other end of the rotating shaft transversely penetrates through the lower end of the vertical supporting rod, and the vertical supporting rod can rotate around the rotating shaft; the bracket system comprises a pilot pit primary support arch bracket and a pilot pit temporary support arch bracket which are respectively arranged at two sides of a tunnel excavation trolley, wherein the pilot pit primary support arch bracket is I-steel with the radian identical to that of the pilot pit primary support arch bracket, the pilot pit temporary support arch bracket is I-steel with the radian identical to that of the pilot pit temporary support arch bracket, the lower ends of the pilot pit primary support arch bracket and the pilot pit temporary support arch bracket are respectively supported on the two transverse support rods, and the upper ends of the pilot pit primary support arch bracket and the pilot pit temporary support arch bracket are respectively connected with the upper ends of the vertical support rods through pin shafts; the upper ends of the pilot pit primary support arch frame bracket and the pilot pit temporary support arch frame bracket are respectively welded with a bracket connecting plate, and are connected with the upper ends of the vertical support rods through pin shafts;
the traveling system comprises a plurality of traveling pulleys, each traveling pulley comprises a horizontally arranged supporting beam, two ends of the bottom of each supporting beam are respectively welded with one supporting leg, the bottom of each supporting leg is provided with a pulley traveling wheel, the middle of the top of each supporting beam is welded with the lower end of a vertically arranged supporting screw rod, the upper end of each supporting screw rod penetrates through a horizontal supporting plate, two sides of each horizontal supporting plate are respectively welded with a vertical supporting plate, and a control nut is screwed on each supporting screw rod at the bottom surface of each horizontal supporting plate; a trolley traveling rail is respectively paved on an upper platform, a middle platform and a lower platform of the tunnel excavation trolley along the longitudinal direction of the trolley, each movable trolley is arranged on an upper platform, a middle platform or a lower platform of the tunnel excavation trolley, trolley traveling wheels of the movable trolley are supported on the trolley traveling rail, and a horizontal support plate and a vertical support plate of each movable trolley are welded with a pilot pit primary support arch bracket or a pilot pit temporary support arch bracket;
the pushing system comprises a plurality of hydraulic pushing devices, each hydraulic pushing device comprises a base, two rollers are respectively arranged on two sides of the bottom of the base, an oblique oil cylinder is arranged on one side of the top surface of the base, the rear end of the oblique oil cylinder is connected with the base through a pin shaft, the front end of the oblique oil cylinder faces the outer side of the trolley and is provided with an arch centering fixing device, and a connecting plate is welded at the bottom of the outer wall of the front end of the oblique oil cylinder; the other side of the top surface of the base is provided with a vertical oil cylinder, the lower end of the vertical oil cylinder is connected with the base through a pin shaft, and the upper end of the vertical oil cylinder is supported at the upper end of the inclined oil cylinder and is connected with a connecting plate at the bottom of the front end of the inclined oil cylinder through a pin shaft; two hydraulic pushing device guide rails are respectively arranged on the lower platform, the middle platform and the upper platform of the tunnel excavation trolley, each hydraulic pushing device is arranged on the lower platform, the middle platform or the upper platform of the tunnel excavation trolley, and rollers on two sides of the bottom of the base are respectively supported on the two hydraulic pushing device guide rails.
2. The pit support arch quick install system of claim 1, wherein: the arch centering fixing device at the front end of the oblique oil cylinder of the hydraulic pushing device comprises a lock catch, wherein the lock catch comprises an L-shaped push plate, two L-shaped screws and an L-shaped clamping plate, the L-shaped push plate is a right angle steel, one edge of the L-shaped push plate is fixedly connected with the front end of the oblique oil cylinder, two pairs of lug plates are welded on the other edge of the L-shaped push plate along the direction parallel to the axis of the oblique oil cylinder, screw holes are formed in each lug plate, one end of each L-shaped screw rod is inserted into the screw hole of one pair of lug plates, and two adjusting nuts are screwed and clamped with the top surface and the bottom surface of one lug plate; the L-shaped clamping plate is also a right-angle steel, one edge of the L-shaped clamping plate is welded with the other end of the L-shaped screw rod, and the other edge of the L-shaped clamping plate faces to the front end of the oblique pushing oil cylinder.
3. A method for installing a pit support arch frame by using the pit support arch frame rapid installation system as claimed in claim 1 or 2, which is characterized in that:
(1) Releasing the connecting pin shaft at the upper end of the arch support bracket of the pilot tunnel primary support and the vertical support rod; rotating a control nut on the moving pulley connected with the pilot tunnel temporary support arch bracket to enable a pulley travelling wheel at the bottom of the moving pulley to ascend and leave a pulley travelling rail; loosening a traction rope of a winch, enabling the vertical supporting rod to rotate around a rotating shaft at the lower end of the vertical supporting rod to the rear of the tunnel excavation trolley, and driving the pilot pit temporary supporting arch bracket to be laid on the ground;
(2) Assembling a pilot tunnel temporary support arch on the ground, and binding the pilot tunnel temporary support arch with a pilot tunnel temporary support arch bracket;
(3) Starting a winch to tighten the traction rope, and dragging the vertical support rod, the pilot tunnel temporary support arch bracket and the pilot tunnel temporary support arch bound with the pilot tunnel temporary support arch bracket to an upright state;
(4) Rotating a control nut on a moving pulley connected with a pilot tunnel temporary support arch bracket to enable a pulley travelling wheel at the bottom of the moving pulley to descend and be supported on a pulley travelling rail; the connecting pin shafts of the pilot tunnel temporary support arch frame bracket and the vertical supporting rods are released, and meanwhile, the chain block is operated to loosen the chain block, so that one end of the transverse supporting rod for supporting the pilot tunnel temporary support arch frame bracket is lowered in height and separated from the lower end of the pilot tunnel temporary support arch frame bracket, and the pilot tunnel temporary support arch frame bracket is supported by the movable pulley completely;
(5) Pushing a pulley for supporting the temporary supporting arch frame bracket of the pilot pit to move to a preset installation position of the temporary supporting arch frame of the pilot pit, which is opposite to the side wall of the pilot pit, along a pulley walking track;
(6) Pushing the hydraulic pushing device to one side of the pilot tunnel temporary supporting arch frame, starting the vertical pushing oil cylinder to stretch and retract, and adjusting the axis of the inclined oil cylinder to be perpendicular to the axis of the pilot tunnel temporary supporting arch frame; starting an oblique pushing oil cylinder to enable the front end of the oblique pushing oil cylinder to be close to the pilot tunnel temporary supporting arch frame, and connecting and fixing an arch frame fixing device at the front end of the oblique pushing oil cylinder with the pilot tunnel temporary supporting arch frame;
(7) Removing the binding between the temporary supporting arch frame bracket of the pilot pit and the temporary supporting arch frame of the pilot pit, and pushing the movable pulley to move away the temporary supporting arch frame bracket of the pilot pit; starting an oblique pushing cylinder to push the pilot tunnel temporary supporting arch frame to the side wall of the pilot tunnel, and installing and fixing the pilot tunnel temporary supporting arch frame;
(8) Connecting a bracket of the pilot tunnel primary support arch frame with the upper end of the vertical support rod through a pin shaft, and then installing the pilot tunnel primary support arch frame according to the methods from the step (1) to the step (7);
(9) And (3) circulating the steps (1) to (8) to finish the installation of all the pilot tunnel temporary support arches and the pilot tunnel primary support arches.
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| CN110318787B (en) * | 2019-08-02 | 2024-02-27 | 中交二公局第四工程有限公司 | One-way four-lane highway tunnel can assemble excavation and steel bow member mounting trolley |
| CN114215540A (en) * | 2021-12-16 | 2022-03-22 | 中国水利水电第七工程局有限公司 | Tunnel subsurface excavation supporting rack device |
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| CN110005452A (en) | 2019-07-12 |
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