CN205117356U - Self -drilling spiral pipe canopy - Google Patents
Self -drilling spiral pipe canopy Download PDFInfo
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- CN205117356U CN205117356U CN201520938935.4U CN201520938935U CN205117356U CN 205117356 U CN205117356 U CN 205117356U CN 201520938935 U CN201520938935 U CN 201520938935U CN 205117356 U CN205117356 U CN 205117356U
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Abstract
The utility model discloses a self -drilling spiral pipe canopy, including direction wall, pre -buried at a plurality of drill ways pipe and many piece of direction in the wall pipe canopy pipe in a plurality of drill way guan youhou creep into face the place ahead rock mass in tunnel hole forward respectively, the direction wall lies in the inside front side of outwards excavating the rig studio that the back formed to tunnel hole hunch portion, be provided with first tunnel initial stage supporting construction in the rig studio, first tunnel initial stage supporting construction includes that first concrete sprays layer and a plurality of first shaped steel support, and the direction wall is the arc, the arc reinforcing bar net that is provided with the steel bow member in the direction wall and goes on the steel bow member fixing, every root canal canopy guan jun includes the body and the drill bit of coaxial arrangement at the body front end that is formed by a plurality of tube couplings concatenations, and it has a plurality of injected holes to open on the drill bit, and a plurality of injected holes all with inside the body communicate with each other. The utility model has the advantages of simple structure and reasonable design and the construction is simple and convenient, excellent in use effect, can accomplish the weak surrounding rock tunnel advance support process portably, fast to strut effectually.
Description
Technical field
The utility model belongs to tunnel advanced support technical field of construction, especially relates to a kind of self-drilling helix tube canopy.
Background technology
Barrel vault advanced support squeezes in stratum by one group of steel pipe (i.e. pipe canopy pipe) boring that oneself has bored outside the excavation contour line in tunnel, and be combined to form powerful frame pre support reinforcement system with steel arch-shelf, the load of Guan Peng top country rock is come from order to supporting, and added by injected hole and press to slip casting in stratum, to reinforce the stratum of weak broken, improve the self-stable ability on stratum.
In constructing tunnel, rank is the country rock of less than IV grade is weak surrounding rock.During as constructed to the large Du Shan tunnel in the elder brother's Line for Passenger Transportation of Shanghai, it is interval to Pu'an that this tunnel is positioned at Guan Ling, belongs to I level risk height tunnel, complex geologic conditions, unpredictable geology disaster is more, and enclosing lithologies is mud stone, argillaceous limestone, rock matter is softer, and mud content is serious; Developmental joint fissure, underground water is grown, and rock mass is met water after-tack and is exceedingly fast, and many in prose style free from parallelism shape and Powdered, self extreme difference, very easily collapses in work progress.Large solely mountain tunnel trunk mainly passes through the stratum such as dolomite, limestone, mud stone, marl, mud stone burning into sand rock, wherein can lava segment length 8753m.Barrel passes through 7 tomographies such as Daxing stockaded village tomography, ground, gantry tomography, the rock tomography that collapses, bight tomography, slope, military camp tomography, poplar man thrust fault, Yongning town tomography successively, infers zone of fracture for 8,4 can lava and non-can lava contact zones.Therefore, the barrel vault advanced support difficulty of construction in large Du Shan tunnel is very large.
At present, in tunnel construction, what pipe roof construction mainly adopted is draw hole to head into method construction, specifically first outside tunnel excavation outline line, utilizes rig boring, is then entered by pipe ceiling in the boring of having bored, finally carry out injection stability.During practice of construction, draw hole and head into method and deposit problem in the following areas: the first, working procedure is many, procedure connection is complicated, construction period is longer, flexibility is poor, and advance support length and parameter are difficult to adjust in time according to actual drilling construction situation, and needs professional operation team to construct; The second, after pipe canopy is in place, adopt low-pressure grouting, grout spreading range is little, is difficult to the fixing collar formed in a big way; Three, perforate on pipe canopy pipe, because of the reason of pipe canopy pipe body perforate, the first filling near-end of slurries, block exhaust passage, cause pipe canopy far-end and top to there is air rubber capsule, slip casting can not be full; Four, the construction area that self is poor, easy collapse hole, heads into pipe canopy difficulty.Therefore, simple, the reasonable in design and self-drilling helix tube canopy that easy construction, result of use are good of a kind of structure need be designed, can easy, complete Support System in Soft Rock Tunnels advance support process fast, and supporting effect is good.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of self-drilling helix tube canopy is provided, its structure is simple, reasonable in design and easy construction, result of use are good, can easy, complete Support System in Soft Rock Tunnels advance support process fast, and supporting effect is good.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of self-drilling helix tube canopy, it is characterized in that: comprise guiding wall, be embedded in guiding multiple orifice tube within the walls and Duo Gen respectively through multiple described orifice tube by the pipe canopy pipe crept into before backward in the front of tunnel heading rock mass of Tunnel, described guiding wall is positioned at the inner front side of the rig service depot of Tunnel arch outwards being excavated to rear formation, and the length of described rig service depot is 5m ~ 8m; The first Tunnel structure is provided with in described rig service depot, described first Tunnel structure comprises the first concrete ejection layer and multiple the first shape steel bracket be supported in from front to back in rig service depot that are formed by the concrete be injected on rig chamber internal wall, and multiple described first shape steel bracket is all fixed in the first concrete ejection layer and it is the shape steel bracket arch of rig service depot and left and right sides abutment wall being carried out to supporting; Described guiding wall is arc and it is concrete wall, and the structure of multiple described orifice tube is all identical with size and it is all laid on the same cross section of rig service depot; The arch steel net that described guiding is provided with steel arch-shelf within the walls and is fixed steel arch-shelf, described arch steel net is fixed on above steel arch-shelf; Described steel arch-shelf is positioned at immediately below described first shape steel bracket, and the first shape steel bracket be positioned at directly over steel arch-shelf is fixed support, and described steel arch-shelf is fixed on described fixed support by described arch steel net; Multiple described orifice tube is all weldingly fixed on steel arch-shelf and its center line along steel arch-shelf is laid from left to right, described steel arch-shelf has multiple respectively for the installing hole that multiple described orifice tube is installed; Described guiding wall is positioned at below the first concrete ejection layer and itself and the first concrete ejection layer are fastenedly connected and are integrated, multiple described orifice tube is respectively the guide pipe led to many described pipe canopy pipes, and pipe canopy Guan Junyu described in every root lays in coaxial its guide pipe led;
The structure of many described pipe canopy pipes is all identical with size and its outer limb is 1 ° ~ 3 °; Pipe canopy pipe described in every root includes the body be spliced by multiple tube coupling and the drill bit being coaxially arranged on described body front end, and multiple described tube coupling is all laid in coaxial, the structure of multiple described tube coupling all identical and its lay from front to back; The cross-sectional structure of multiple described tube coupling, with size is all identical and it is spiral steel pipe, is all connected and sealed by adapter sleeve between adjacent two described tube couplings; The tube coupling being positioned at front side in multiple described tube coupling is front end tube coupling, and the tube coupling being positioned at last side in multiple described tube coupling is rear end tube coupling, and described drill bit is arranged on the front portion of described front end tube coupling; Described drill bit has multiple injected hole, and multiple described injected hole all communicates with described tubular body.
Above-mentioned self-drilling helix tube canopy, is characterized in that: described body is spliced drilling rod, and described adapter sleeve is drilling rod adapter sleeve.
Above-mentioned self-drilling helix tube canopy, is characterized in that: the external diameter of described body is Φ 70mm ~ Φ 120mm and its length is 15m ~ 30m, and the length of described tube coupling is 3m ~ 6m.
Above-mentioned self-drilling helix tube canopy, is characterized in that: described drill bit be diameter by backward front diminishing conical drill bit, the rear end diameter of described drill bit is greater than the external diameter of described body and its rear end diameter is less than the internal diameter of guide pipe; Multiple described injected hole along the circumferential direction evenly lays and it is all laid along the central axis of drill bit.
Above-mentioned self-drilling helix tube canopy, it is characterized in that: the lateral wall of described conical drill bit is provided with and is multiplely laid with multiple brill tooth along the hand of spiral, the hand of spiral of multiple described tube coupling is all identical, and the hand of spiral of multiple described brill tooth is identical with the hand of spiral of described tube coupling.
Above-mentioned self-drilling helix tube canopy, it is characterized in that: be provided with the second Tunnel structure in the Tunnel on rear side of described rig working space, described second Tunnel structure comprises the second concrete ejection layer and multiple Second-Type steel bracket be supported in from front to back in Tunnel that are formed by the concrete be injected on Tunnel inwall; Described first concrete ejection layer and the second concrete ejection layer are all fastenedly connected and are integrated.
Above-mentioned self-drilling helix tube canopy, is characterized in that: described steel arch-shelf is arc and its central angle is 140 ° ~ 160 °; Multiple described orifice tube is in evenly to lay and circumferential distance between adjacent two described orifice tubes is 35cm ~ 45cm.
Above-mentioned self-drilling helix tube canopy, is characterized in that: described rig working space is the space formed after outwards excavating 35cm ~ 45cm to the arch of Tunnel; Described steel arch-shelf is i iron bow member, and multiple described first shape steel bracket is flange beam stand.
Above-mentioned self-drilling helix tube canopy, it is characterized in that: described steel arch-shelf is fixed on described fixed support by arch steel net, described arch steel net comprises arch steel that multiple tracks lays and the connecting reinforcement that multiple tracks is along the circumferential direction laid from left to right from top to bottom, arch steel described in multiple tracks is all between steel arch-shelf and described fixed support, the inner of connecting reinforcement described in multiple tracks is all fixed on steel arch-shelf and its outer end and is all fixed on described fixed support, and connecting reinforcement described in per pass is all fastenedly connected with arch steel described in multiple tracks and is integrated.
The utility model compared with prior art has the following advantages:
1, simple, the reasonable in design and easy construction of structure, input cost is lower.
2, the rig service depot stabilized structure adopted, result of use is good, sufficient working space can be provided for rig, and use procedure safely, reliably, the construction demand of Support System in Soft Rock Tunnels barrel vault advanced support can be met, can for easy, fast and safely Support System in Soft Rock Tunnels barrel vault advanced support work progress effective guarantee is provided.Rig working space inner front side arranges the guiding wall led to the many pipe canopy pipes that need construct, and the first preliminary bracing anatomical connectivity led in wall and rig working space is integrated; Meanwhile, the steel arch-shelf arranged within the walls that leads is fixed on the first shape steel bracket by arch steel net, fixing easy, reliable.
3, efficiency of construction is high, construction quality is easy to control and result of use is good, can easy, complete Support System in Soft Rock Tunnels advance support work progress fast, short construction period, pipe canopy pipe adopts double-strength pipe, and wears alloy bit at high-strength pipe end, and drill bit is as rotation casting head, under the effect of rig, carry out cement paste dado creep into, creep into, pipe canopy pipe installs and slip casting once completes, secondary high-pressure slip-casting is carried out in whole hole, finally forms the barrel vault advanced support system of high strength in arch, tunnel.Meanwhile, adopt limit to creep into the mode of marginal not slurry, grout spreading range is comparatively large, can improve country rock to a certain extent.Thus, the advantage such as have construction technology simple and fast, short construction period, reinforcing efficiency is high, consolidation effect is good, effectively can evade construction risk; To the stability improving weak surrounding rock, have good effect, the barrel vault advanced support structure of construction molding can carry out effective support to Support System in Soft Rock Tunnels.
In sum, the utility model structure is simple, reasonable in design and easy construction, result of use are good, can easy, complete Support System in Soft Rock Tunnels advance support process fast, and supporting effect is good.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is cross-sectional configuration schematic diagram of the present utility model.
Fig. 2 is the structural representation of the utility model pipe canopy pipe.
Fig. 3 is the structural representation of the utility model guiding wall and orifice tube.
Fig. 4 is Construction State schematic diagram of the present utility model.
Description of reference numerals:
1-steel arch-shelf; 2-guide pipe; 3-pipe canopy pipe;
3-1-tube coupling; 3-2-drill bit; 3-3-drilling rod adapter sleeve;
4-Tunnel; 5-rig service depot; 6-guiding wall;
7-the first shape steel bracket; 8-the first concrete ejection layer;
9-the second concrete ejection layer; 10-Second-Type steel bracket; 11-arch steel;
12-connecting reinforcement; 13-rig; 14-slurry filling machine;
15-jointing; 16-slip casting interface; 17-Grouting Pipe.
Detailed description of the invention
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, the utility model comprises guiding wall 6, be embedded in multiple orifice tube in guiding wall 6 and Duo Gen respectively through multiple described orifice tube by the pipe canopy pipe 3 crept into before backward in the front of tunnel heading rock mass of Tunnel 4, described guiding wall 6 is positioned at the inner front side of the rig service depot 5 of Tunnel 4 arch outwards being excavated to rear formation, and the length of described rig service depot 5 is 5m ~ 8m; The first Tunnel structure is provided with in described rig service depot 5, described first Tunnel structure comprises the first concrete ejection layer 8 and multiple the first shape steel bracket 7 be supported in from front to back in rig service depot 5 that are formed by the concrete be injected on rig service depot 5 inwall, and multiple described first shape steel bracket 7 is all fixed in the first concrete ejection layer 8 and it is the shape steel bracket arch of rig service depot 5 and left and right sides abutment wall being carried out to supporting.Described guiding wall 6 is arc and it is concrete wall, the structure of multiple described orifice tube all identical with size and its be all laid on the same cross section of rig service depot 5.The arch steel net being provided with steel arch-shelf 1 in described guiding wall 6 and being fixed steel arch-shelf 1, described arch steel net is fixed on above steel arch-shelf 1.Described steel arch-shelf 1 is positioned at immediately below described first shape steel bracket 7, and the first shape steel bracket 7 be positioned at directly over steel arch-shelf 1 is fixed support, and described steel arch-shelf 1 is fixed on described fixed support by described arch steel net.Multiple described orifice tube is all weldingly fixed on steel arch-shelf 1 and its center line along steel arch-shelf 1 is laid from left to right, described steel arch-shelf 1 has multiple respectively for the installing hole that multiple described orifice tube is installed.Described guiding wall 6 is positioned at below the first concrete ejection layer 8 and itself and the first concrete ejection layer 8 are fastenedly connected and are integrated, multiple described orifice tube is respectively the guide pipe 2 led to many described pipe canopy pipes 3, and pipe canopy pipe 3 described in every root is all laid in coaxial with the guide pipe 2 led to it.
The structure of many described pipe canopy pipes 3 is all identical with size and its outer limb is 1 ° ~ 3 °.As shown in Figure 2, pipe canopy pipe 3 described in every root includes the body be spliced by multiple tube coupling 3-1 and the drill bit 3-2 being coaxially arranged on described body front end, multiple described tube coupling 3-1 all lays in coaxial, the structure of multiple described tube coupling 3-1 all identical and its lay from front to back; The cross-sectional structure of multiple described tube coupling 3-1, with size is all identical and it is spiral steel pipe, is all connected and sealed by adapter sleeve between adjacent two described tube coupling 3-1.The tube coupling 3-1 being positioned at front side in multiple described tube coupling 3-1 is front end tube coupling 3-1, and the tube coupling 3-1 being positioned at last side in multiple described tube coupling 3-1 is rear end tube coupling 3-1, and described drill bit 3-2 is arranged on the front portion of described front end tube coupling 3-1.Described drill bit 3-2 has multiple injected hole, and multiple described injected hole all communicates with described tubular body.
In the present embodiment, described body is spliced drilling rod, and described adapter sleeve is drilling rod adapter sleeve 3-3.
During actual use, the external diameter of described body is Φ 70mm ~ Φ 120mm.
In the present embodiment, described drill bit 3-2 be diameter by backward front diminishing conical drill bit, the rear end diameter of described drill bit 3-2 is greater than the external diameter of described body and its rear end diameter is less than the internal diameter of guide pipe 2.
Further, the lateral wall of described conical drill bit is provided with and is multiplely laid with multiple brill tooth along the hand of spiral, the hand of spiral of multiple described tube coupling 3-1 is all identical, and the hand of spiral of multiple described brill tooth is identical with the hand of spiral of described tube coupling 3-1.
In the present embodiment, multiple described injected hole along the circumferential direction evenly lays and it is all laid along the central axis of drill bit 3-2.
Further, the quantity of described injected hole is three.
Actual when using, can according to specific needs, the quantity of described injected hole and the installation position of each injected hole on drill bit 3-2 are adjusted accordingly.
In the present embodiment, the external diameter of described body is Φ 90mm, and the external diameter of described guide pipe 2 is Φ 150mm and its wall thickness is 10mm, and the rear end diameter of described drill bit 3-2 is Φ 115mm.
During practice of construction, can according to specific needs, the rear end diameter of the external diameter of described body, the internal diameter of guide pipe 2 and drill bit 3-2 be adjusted accordingly.
In the present embodiment, described tube coupling 3-1 is thick walled steel tube and its wall thickness is 15mm.
Actually add man-hour, described drill bit 3-2 is alloy bit.Further, can according to specific needs, the rear end diameter of drill bit 3-2 be adjusted accordingly.
In the present embodiment, the length of described drilling rod adapter sleeve 3-3 is 220mm.
In the present embodiment, the length of described body is 15m ~ 30m; The length of described tube coupling 3-1 is 3m ~ 6m.
During practice of construction, can according to specific needs, the length of described body and the length of each tube coupling 3-1 be adjusted accordingly.
In practice of construction process, multiple described guide pipe 2 is in evenly to lay and circumferential distance between adjacent two described guide pipes 2 is 35cm ~ 45cm.
In the present embodiment, the circumferential distance between adjacent two described guide pipes 2 is 40cm.
In the present embodiment, be provided with the second Tunnel structure in Tunnel 4 on rear side of described rig working space 5, described second Tunnel structure comprises the second concrete ejection layer 9 and multiple Second-Type steel bracket 10 be supported in from front to back in Tunnel 4 that are formed by the concrete be injected on Tunnel 4 inwall; Described first concrete ejection layer 8 and the second concrete ejection layer 9 are all fastenedly connected and are integrated.
In the present embodiment, described first shape steel bracket 7 and Second-Type steel bracket 10 are flange beam stand.
During actual use, described first shape steel bracket 7 and Second-Type steel bracket 10 also can adopt the steel bracket of other type.
In practice of construction process, described steel arch-shelf 1 is for arc and its central angle is 140 ° ~ 160 °.
Further, described steel arch-shelf 1 is i iron bow member.
During actual use, described steel arch-shelf 1 also can adopt the shape steel bracket of other type.What adopt steel arch-shelf 1 to construct as tunnel barrel vault advanced support simple and easyly protects arch.In the present embodiment, the central angle of described steel arch-shelf 1 is 150 °.
During practice of construction, described rig working space 5 is the space formed after outwards excavating 35cm ~ 45cm to the arch of Tunnel 4.
In the present embodiment, the length of described rig service depot 5 is 6m.Further, described rig service depot 5 is the space formed after outwards excavating 40cm to the arch of Tunnel 4, and that is, the space after 40cm is heightened in Tunnel 4 arch by rig service depot 5.
In the present embodiment, described steel arch-shelf 1 is fixed on described fixed support by arch steel net, described arch steel net comprises arch steel 11 that multiple tracks lays and the connecting reinforcement 12 that multiple tracks is along the circumferential direction laid from left to right from top to bottom, arch steel 11 described in multiple tracks is all between steel arch-shelf 1 and described fixed support, the inner of connecting reinforcement 12 described in multiple tracks is all fixed on steel arch-shelf 1 and its outer end and is all fixed on described fixed support, and connecting reinforcement 12 described in per pass is all fastenedly connected with arch steel described in multiple tracks 11 and is integrated.
During practice of construction, first construction drill service depot 5 on rear side of face; Afterwards, at the inner front side construction guidance wall 6 of rig service depot 5, and at pre-buried steel bow member 1 and the multiple described orifice tube in wall 6 that lead; Then, rigging up 13 and slurry filling machine 14 in rig service depot 5, described rig 13 and slurry filling machine 14 are all positioned on rear side of guiding wall 6; After rig 13 and slurry filling machine 14 installation, respectively barrel vault advanced support construction is carried out to many described pipe canopy pipes 3, and many described pipe canopy pipes 3 creep in front of tunnel heading rock mass before backward through multiple described guide pipe 2 respectively.When carrying out barrel vault advanced support construction to pipe canopy pipe 3 described in every root, process is as follows:
Step 101, creep into front preparation: in the front end tube coupling 3-1 front portion of current constructed pipe canopy pipe 3, drill bit 3-2 is installed, and the described rear end of front end tube coupling 3-1 is connected with the driving mechanism that creeps into of rig 13, be connected with slurry filling machine 14 by the rear end of Grouting Pipe 17 by front end tube coupling 3-1 simultaneously;
Step 102, front end tube coupling creep into and synchronous grouting: by the tube coupling 3-1 of front end described in step 10 by being inserted into before backward in the guide pipe 2 that leads to current constructed pipe canopy pipe 3, and front end tube coupling 3-1 is laid in coaxial with the guide pipe 2 inserted; Afterwards, start rig 13 and by rig 13 by after march forward row creep into; In drilling process, slurry filling machine 14 is adopted synchronously to carry out slip casting;
Step 103, tube coupling continue: creep into current having completed and install next tube coupling 3-1 on rear side of the tube coupling 3-1 being positioned at rear side, and by the rear end of current installed tube coupling 3-1 with creep into driving mechanism described in step 10 and be connected, be connected with slurry filling machine 14 by the rear end of Grouting Pipe 17 by current installed tube coupling 3-1 simultaneously;
Step 104, continue to creep into and synchronous grouting: start rig 13 and by rig 13 by after the row that marches forward creep into; In drilling process, slurry filling machine 14 is adopted synchronously to carry out slip casting;
Step 105, repeatedly repetition step 103 are to step 104, until complete the drilling process of all tube coupling 3-1 in current constructed pipe canopy pipe 3, complete boring and the synchronous grouting work progress of current constructed pipe canopy pipe 3, obtain the boring residing for current constructed pipe canopy pipe 3;
Step 106, drilling orifice shutoff: shutoff is carried out to the aperture of the residing boring of current constructed pipe canopy pipe 3, obtains drilling orifice plugging structure, and lay steam vent at described drilling orifice plugging structure; Described drilling orifice plugging structure is the plugging structure in toroidal cavity between the aperture of described boring and the lateral wall of current construction pipe canopy pipe 3, and described steam vent communicates with described toroidal cavity inside;
Step 107, the slip casting of whole hole: after in step 106, drilling orifice shutoff completes, adopt slurry filling machine 14 to carry out secondary grouting, till injection slurry flows out to some extent in described steam vent, complete the whole hole mortar depositing construction process of current constructed pipe canopy pipe 3.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solutions of the utility model.
Claims (9)
1. a self-drilling helix tube canopy, it is characterized in that: comprise guiding wall (6), be embedded in multiple orifice tube in guiding wall (6) and Duo Gen respectively through multiple described orifice tube by the pipe canopy pipe (3) crept into before backward in the front of tunnel heading rock mass of Tunnel (4), described guiding wall (6) is positioned at the inner front side of the rig service depot (5) of Tunnel (4) arch outwards being excavated to rear formation, and the length of described rig service depot (5) is 5m ~ 8m; The first Tunnel structure is provided with in described rig service depot (5), described first Tunnel structure comprises the first concrete ejection layer (8) and multiple the first shape steel bracket (7) be supported in from front to back in rig service depot (5) that are formed by the concrete be injected on rig service depot (5) inwall, and multiple described first shape steel bracket (7) is all fixed in the first concrete ejection layer (8) and it is the shape steel bracket arch of rig service depot (5) and left and right sides abutment wall being carried out to supporting; Described guiding wall (6) is for arc and it is concrete wall, and the structure of multiple described orifice tube is all identical with size and it is all laid on the same cross section of rig service depot (5); The arch steel net being provided with steel arch-shelf (1) in described guiding wall (6) and steel arch-shelf (1) is fixed, described arch steel net is fixed on steel arch-shelf (1) top; Described steel arch-shelf (1) is positioned at immediately below described first shape steel bracket (7), the first shape steel bracket (7) be positioned at directly over steel arch-shelf (1) is fixed support, and described steel arch-shelf (1) is fixed on described fixed support by described arch steel net; Multiple described orifice tube is all weldingly fixed on upper and its center line along steel arch-shelf (1) of steel arch-shelf (1) and lays from left to right, described steel arch-shelf (1) has multiple respectively for the installing hole that multiple described orifice tube is installed; Described guiding wall (6) is positioned at the first concrete ejection layer (8) below and itself and the first concrete ejection layer (8) are fastenedly connected and are integrated, multiple described orifice tube is respectively the guide pipe (2) led to many described pipe canopy pipes (3), and pipe canopy pipe (3) described in every root is all laid in coaxial with the guide pipe (2) led to it;
The structure of many described pipe canopy pipes (3) is all identical with size and its outer limb is 1 ° ~ 3 °; Pipe canopy pipe (3) described in every root includes the body be spliced by multiple tube coupling (3-1) and the drill bit (3-2) being coaxially arranged on described body front end, multiple described tube coupling (3-1) is all laid in coaxial, the structure of multiple described tube coupling (3-1) all identical and its lay from front to back; The cross-sectional structure of multiple described tube coupling (3-1), with size is all identical and it is spiral steel pipe, is all connected and sealed by adapter sleeve between adjacent two described tube couplings (3-1); The tube coupling (3-1) being positioned at front side in multiple described tube coupling (3-1) is front end tube coupling (3-1), be positioned at the tube coupling (3-1) of last side in multiple described tube coupling (3-1) for rear end tube coupling (3-1), described drill bit (3-2) is arranged on the front portion of described front end tube coupling (3-1); Described drill bit (3-2) has multiple injected hole, and multiple described injected hole all communicates with described tubular body.
2. according to self-drilling helix tube canopy according to claim 1, it is characterized in that: described body is spliced drilling rod, described adapter sleeve is drilling rod adapter sleeve (3-3).
3. according to the self-drilling helix tube canopy described in claim 1 or 2, it is characterized in that: the external diameter of described body is Φ 70mm ~ Φ 120mm and its length is 15m ~ 30m, the length of described tube coupling (3-1) is 3m ~ 6m.
4. according to the self-drilling helix tube canopy described in claim 1 or 2, it is characterized in that: described drill bit (3-2) is for diameter is by backward front diminishing conical drill bit, and the rear end diameter of described drill bit (3-2) is greater than the external diameter of described body and its rear end diameter is less than the internal diameter of guide pipe (2); Multiple described injected hole along the circumferential direction evenly lays and it is all laid along the central axis of drill bit (3-2).
5. according to self-drilling helix tube canopy according to claim 4, it is characterized in that: the lateral wall of described conical drill bit is provided with and is multiplely laid with multiple brill tooth along the hand of spiral, the hand of spiral of multiple described tube coupling (3-1) is all identical, and the hand of spiral of multiple described brill tooth is identical with the hand of spiral of described tube coupling (3-1).
6. according to the self-drilling helix tube canopy described in claim 1 or 2, it is characterized in that: be provided with the second Tunnel structure in the Tunnel (4) of described rig working space (5) rear side, described second Tunnel structure comprises the second concrete ejection layer (9) and multiple Second-Type steel bracket (10) be supported in from front to back in Tunnel (4) that are formed by the concrete be injected on Tunnel (4) inwall; Described first concrete ejection layer (8) and the second concrete ejection layer (9) are all fastenedly connected and are integrated.
7. according to the self-drilling helix tube canopy described in claim 1 or 2, it is characterized in that: described steel arch-shelf (1) is for arc and its central angle is 140 ° ~ 160 °; Multiple described orifice tube is in evenly to lay and circumferential distance between adjacent two described orifice tubes is 35cm ~ 45cm.
8. according to the self-drilling helix tube canopy described in claim 1 or 2, it is characterized in that: described rig working space (5) is the space formed after outwards excavating 35cm ~ 45cm to the arch of Tunnel (4); Described steel arch-shelf (1) is i iron bow member, and multiple described first shape steel bracket (7) is flange beam stand.
9. according to the self-drilling helix tube canopy described in claim 1 or 2, it is characterized in that: described steel arch-shelf (1) is fixed on described fixed support by arch steel net, described arch steel net comprises arch steel (11) that multiple tracks lays and the connecting reinforcement (12) that multiple tracks is along the circumferential direction laid from left to right from top to bottom, arch steel described in multiple tracks (11) is all positioned between steel arch-shelf (1) and described fixed support, the inner of connecting reinforcement described in multiple tracks (12) is all fixed on that steel arch-shelf (1) is upper and its outer end is all fixed on described fixed support, connecting reinforcement described in per pass (12) is all fastenedly connected with arch steel described in multiple tracks (11) and is integrated.
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| CN201520938935.4U CN205117356U (en) | 2015-11-21 | 2015-11-21 | Self -drilling spiral pipe canopy |
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| CN201520938935.4U CN205117356U (en) | 2015-11-21 | 2015-11-21 | Self -drilling spiral pipe canopy |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801612A (en) * | 2017-02-28 | 2017-06-06 | 中铁建大桥工程局集团第五工程有限公司 | A kind of T76S high intensity self-drilling type barrel vault advanced support engineering method |
| CN109372540A (en) * | 2018-11-23 | 2019-02-22 | 贵州大学 | A kind of constructing tunnel fixes device with bracing members |
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| CN106801612A (en) * | 2017-02-28 | 2017-06-06 | 中铁建大桥工程局集团第五工程有限公司 | A kind of T76S high intensity self-drilling type barrel vault advanced support engineering method |
| CN109372540A (en) * | 2018-11-23 | 2019-02-22 | 贵州大学 | A kind of constructing tunnel fixes device with bracing members |
| CN109372540B (en) * | 2018-11-23 | 2020-08-04 | 贵州大学 | Steel support fixing device for tunnel construction |
| CN109736824A (en) * | 2018-12-10 | 2019-05-10 | 中交一公局桥隧工程有限公司 | Construction process of T76 high-strength self-drilling spiral pipe shed |
| CN110578536A (en) * | 2019-10-15 | 2019-12-17 | 中铁十二局集团有限公司 | Excavation support reinforcing method for underground excavation section of subway to penetrate existing street crossing channel |
| CN110985002A (en) * | 2019-11-11 | 2020-04-10 | 中铁十九局集团第五工程有限公司 | Tunnel construction method for horizontal semi-soft semi-hard section stratum |
| CN110985002B (en) * | 2019-11-11 | 2021-03-23 | 中铁十九局集团第五工程有限公司 | Tunnel construction method for horizontal semi-soft semi-hard section stratum |
| CN110778321A (en) * | 2019-11-14 | 2020-02-11 | 中建四局土木工程有限公司 | Pipe shed drill bit and pipe shed construction method under soft soil condition |
| CN113503171A (en) * | 2021-08-11 | 2021-10-15 | 中电建路桥集团有限公司 | Guiding self-drilling type pipe shed steel pipe device for tunnel excavation and construction method |
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