CN111827879B - Horizontal drilling construction method for large-diameter pipe shed in shallow-earth-covered weak stratum - Google Patents
Horizontal drilling construction method for large-diameter pipe shed in shallow-earth-covered weak stratum Download PDFInfo
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- CN111827879B CN111827879B CN202010635795.9A CN202010635795A CN111827879B CN 111827879 B CN111827879 B CN 111827879B CN 202010635795 A CN202010635795 A CN 202010635795A CN 111827879 B CN111827879 B CN 111827879B
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- 238000005553 drilling Methods 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 20
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- 239000010432 diamond Substances 0.000 claims abstract description 32
- 239000002689 soil Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 57
- 239000010959 steel Substances 0.000 claims description 57
- 229910052799 carbon Inorganic materials 0.000 claims description 48
- 238000012856 packing Methods 0.000 claims description 27
- 238000003466 welding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 9
- 241000251468 Actinopterygii Species 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 235000009120 camo Nutrition 0.000 claims description 3
- 235000005607 chanvre indien Nutrition 0.000 claims description 3
- 239000011487 hemp Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000011440 grout Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000007569 slipcasting Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
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- 239000002002 slurry Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/18—Connecting or disconnecting drill bit and drilling pipe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Fluid Mechanics (AREA)
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Abstract
The invention discloses a horizontal drilling construction method for a large-diameter pipe shed in a shallow earthing weak stratum, which comprises the steps of drilling a hole, positioning and drilling a mounting hole; installing an orifice pipe in the installation hole, wherein the flange end of the orifice pipe is connected with the outlet end of the gate valve through a sealing gasket, and the inlet end of the gate valve is connected with the orifice device; the diamond coring bit with the outer diameter of 300mm is arranged in the orifice device, the rear part of the diamond coring bit with the outer diameter of 300mm is sequentially connected with a drill rod and a drilling machine, and the diamond coring bit with the outer diameter of 300mm sequentially passes through a gate valve and an orifice pipe and then drills through the underground continuous wall; adopting a movable one-way valve coring bit device to carry out soil layer drilling and pipe shed scaling; after the pipe shed drills to the designed position, hole sealing is carried out on the end part; and cleaning sludge in the pipe shed, and filling the pipe shed. This application mesopore gate valve, when gushing water and gushing mud appearing, can be through drill way gate valve slip casting to prevent that the gushing water from gushing mud, lead to the soil layer to produce and warp, the earth's surface subsides, bring adverse effect to pipeline and structure around.
Description
Technical Field
The invention relates to the technical field of pipe shed advanced supporting methods. In particular to a horizontal drilling construction method for a large-diameter pipe shed in a shallow soil covering weak stratum.
Background
The pipe shed advance supporting method is a supporting mode for tunneling in weak surrounding rock. In recent years, the urban scale of China is rapidly expanding, underground passages are more and more constructed on various important ground and underground structures of different types such as subways, expressways, airport runways, important protective buildings, important protective pipelines and the like along with the gradual planning and construction of subway projects, rail traffic projects and urban tunnels, and a pipe shed method is widely adopted in municipal projects as an important advanced supporting mode.
When a common down-the-hole drill impact hole-forming pipe-conveying method is adopted for horizontal drilling of a large-diameter pipe shed in a submerged, weak, loose and water-rich stratum, water gushing can occur during construction, so that hole walls collapse, even water gushing and mud gushing can occur, so that a soil layer deforms, ground surface subsidence can occur, and adverse effects can be brought to surrounding pipelines and structures.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a horizontal drilling construction method for a large-diameter pipe shed in a shallow soil-covered weak stratum, which can reduce the safety risk of water and mud gushing in a soil layer, and the method can not cause ground settlement above the pipe shed and reduce the technical problem of occurrence of chain accidents.
In order to solve the technical problems, the invention provides the following technical scheme:
a horizontal drilling construction method for a large-diameter pipe shed in a shallow soil-covered weak stratum comprises the following steps:
(1) drilling a hole for positioning and drilling a mounting hole;
(2) installing an orifice pipe in the installation hole, wherein the flange end of the orifice pipe is hermetically connected with the outlet end of a gate valve through a sealing gasket, and the inlet end of the gate valve is connected with an orifice device;
in the step (2), the orifice pipe is a low-carbon steel seamless steel welded pipe with the outer diameter of 325mm and the length of 400mm, one end of the orifice pipe is provided with a fish scale buckle with the length of 100mm, and the fish scale buckle is wound with hemp fibers or cotton fibers and then is tamped into the mounting hole; the other end of the orifice pipe is a flange end, a by-pass port is arranged on the lower wall surface of the orifice pipe 10cm away from the flange end of the orifice pipe, an orifice gate valve is mounted on the by-pass port, and the orifice pipe is communicated with the orifice gate valve through the by-pass port; uniformly arranging four expansion screws on the underground continuous wall at the periphery of the mounting hole by taking the orifice pipe as a circle center, wherein the expansion screws are welded to the orifice pipe; the included angle between the four expansion screws is 90 degrees;
the orifice device comprises a packing box, a packing positioned at the bottom of the packing box and a pressing device; the outlet end of the packing box is hermetically connected with the inlet end of the gate valve; one end of the pressing device is inserted into the packing box from the inlet end of the packing box and is in contact with the packing; the other end of the pressing device is connected with the inlet end of the packing box through a bolt;
(3) the diamond coring bit with the outer diameter of 300mm is arranged in the orifice device, the rear part of the diamond coring bit with the outer diameter of 300mm is sequentially connected with a drill rod and a drilling machine, and the diamond coring bit with the outer diameter of 300mm sequentially passes through a gate valve and an orifice pipe and then drills through the underground continuous wall;
after a diamond coring bit with the outer diameter of 300mm drills through the underground diaphragm wall, if the water and mud gushing amount of a soil layer is large, cement paste or double-fluid-paste water stop is injected into the soil layer through an orifice gate valve;
(4) adopting a movable one-way valve coring bit device to carry out soil layer drilling and pipe shed scaling;
(4-1) installing a movable one-way valve coring bit device: the movable one-way valve coring bit device comprises a diamond coring bit with the outer diameter of 275mm, a low-carbon seamless steel pipe with the outer diameter of 273mm and a movable one-way valve; the tail end of the diamond coring bit with the outer diameter of 275mm is welded with a first end of a low-carbon seamless steel pipe with the outer diameter of 273mm, the mobile check valve is spot-welded in the low-carbon seamless steel pipe with the outer diameter of 273mm, and the distance from the tail end of the second end of the low-carbon seamless steel pipe with the outer diameter of 273mm is 100 mm; the inner diameter of the 273mm low-carbon seamless steel pipe is 253mm, the length of the 273mm low-carbon seamless steel pipe is 2000mm, and the diameter of the movable one-way valve is 250mm, and the length of the movable one-way valve is 300 mm; an inner screw thread is arranged at the tail end of the movable one-way valve, the diameter of the inner screw thread is 76mm, and the length of the inner screw thread is 10 mm;
(4-2) installing a drilling machine and drilling: inserting a 275 mm-outer-diameter diamond coring bit of the mobile one-way valve coring bit device into the orifice device, connecting a second end of a 273 mm-outer-diameter low-carbon seamless steel pipe of the mobile one-way valve coring bit device with a drill rod through a screw thread, and then drilling;
(4-3) pipe shed ruler adding: when the drill rod advances by 2000mm, the drill rod is removed, welding points between the movable check valve and the low-carbon seamless steel pipe with the outer diameter of 273mm are cut off, and the cut welding points are polished; then connecting and welding the first end of the low-carbon seamless steel pipe with the external diameter of 273mm with a ruler through screw threads at the cutting welding point of the low-carbon seamless steel pipe with the external diameter of 273mm, wherein the length of the low-carbon seamless steel pipe with the external diameter of 273mm with the ruler is 2000 mm;
(4-4) moving the one-way valve: the drilling machine is connected with a drill rod with the diameter of 76mm, the drill rod with the diameter of 76mm is connected with the movable one-way valve through an inner screw thread, after the connection, the drilling machine drives the drill rod with the diameter of 76mm to retreat, the movable one-way valve retreats to a position which is 10mm away from the second end port of the low-carbon seamless steel pipe with the diameter of 273mm, the movable one-way valve is fixed through spot welding, and the drill rod with the diameter of 76mm retreats;
(4-5) drilling the soil layer: the drill rod is connected with a low-carbon seamless steel pipe with the external diameter of 273mm of the extension ruler in a threaded manner, and the drilling machine continues to drill normally;
(4-6) repeating the steps (4-3) to (4-5) until the design position is drilled, and combining the low-carbon seamless steel pipe with the outer diameter of 273mm with a plurality of lengthened low-carbon seamless steel pipes with the outer diameter of 273mm to form a pipe shed;
(5) after the pipe shed drills to the designed position, hole sealing is carried out on the end part;
(6) and cleaning sludge in the pipe shed, and filling the pipe shed.
In the step (1), a measurement control axis network is determined according to a design construction drawing, lofting data of a central point is calculated and rechecked, actual measurement and lofting are carried out after correctness, all hole sites are lofted and marked, and rechecking is carried out on the hole sites, wherein the error of the holes is less than 100 mm; and drilling a mounting hole with the depth of 300cm at the determined hole opening position by adopting a diamond core bit with the outer diameter of 325mm, and taking out the diamond core bit after cutting off the steel core by using a steel wedge.
According to the horizontal drilling construction method for the large-diameter pipe shed in the shallow-soil-covered weak stratum, in the step (5), after the pipe shed is drilled to the designed position, grouting is conducted into the stratum through the gate valve, a drilling machine is connected with the pipe shed in the grouting process, cement grout is conveyed to the end portion of the pipe shed along with the outer wall of the low-carbon seamless steel pipe with the outer diameter of 273mm in the rotating process of the pipe shed, and the purpose of blocking the end portion is achieved.
In the step (6), after the end part of the pipe shed is plugged, the movable one-way valve is removed, and a drilling machine is connected with a roller bit with the diameter of 200mm to clean mud in the pipe shed;
after the cleaning in the pipe shed is finished, mortar is conveyed through a mortar pump, and the pipe shed is filled.
The technical scheme of the invention achieves the following beneficial technical effects:
1. be equipped with the drill way gate valve in this application, when gushing water and gushing mud appearing, can pass through drill way gate valve slip casting to prevent that the gushing water from gushing mud, lead to the soil layer to produce and warp, the earth's surface subsides, bring adverse effect to pipeline and structure around.
2. Through the use repeatedly of removing the check valve in this application, form the canopy pipe of certain length.
3. Set up closing device and can prevent the emergence of proruption soil layer condition of gushing water.
Drawings
FIG. 1 is a schematic structural diagram of a horizontal drilling construction method for a large-diameter pipe shed in a shallow soil-covered weak stratum;
FIG. 2 is a schematic structural diagram of a mobile one-way valve coring bit device for the horizontal drilling construction method of the large-diameter pipe shed in the shallow soil-covered weak stratum;
FIG. 3 is a schematic structural diagram of a drilling process of the horizontal drilling construction method for the large-diameter pipe shed in the shallow soil-covered weak stratum.
The reference numbers in the figures denote: 1-orifice tube; 1-1-a bypass port; 1-2-orifice gate valve; 1-3-expansion screw; 2-a gate valve; 3-an orifice device; 3-1-packing box; 3-2-a compression device; 3-3-packing; 4-diamond core bit with outer diameter of 300 mm; 5-a drill rod; 6-underground diaphragm wall; 7-soil layer; 8-1-diamond core bit with an outer diameter of 275 mm; 8-2-273 mm outer diameter low-carbon seamless steel tube; 8-3-moving one-way valve; 8-4-inner screw thread.
Detailed Description
The horizontal drilling construction method for the large-diameter pipe shed in the shallow soil-covered weak stratum comprises the following steps:
1. drilling a hole for positioning and drilling a mounting hole; determining a measurement control axis network according to a design construction drawing, calculating and rechecking lofting data of a central point, carrying out field measurement and lofting after the lofting data is correct, marking all lofting of hole sites, rechecking the hole sites, and enabling the hole opening error to be less than 100 mm; and drilling a mounting hole with the depth of 300cm at the determined hole opening position by adopting a diamond core bit with the outer diameter of 325mm, and taking out the diamond core bit after cutting off the steel core by using a steel wedge.
2. As shown in fig. 1, an orifice pipe 1 is installed in an installation hole, a flange end of the orifice pipe 1 is connected with an outlet end of a gate valve 2 in a sealing way through a sealing gasket, and an inlet end of the gate valve 2 is connected with an orifice device 3; the orifice pipe 1 is a low-carbon steel seamless steel welded pipe with the outer diameter of 325mm and the length of 400mm, one end of the orifice pipe 1 is provided with a fish scale buckle with the length of 100mm, and the fish scale buckle is wound with hemp threads or cotton threads and then is tamped into the mounting hole; the other end of the orifice pipe 1 is a flange end, a by-pass port 1-1 is arranged on the lower wall surface of the orifice pipe 1 at a position 10cm away from the flange end of the orifice pipe 1, and an orifice gate valve 1-2 is arranged on the by-pass port 1-1; uniformly arranging four expansion screws 1-3 on an underground continuous wall 6 at the periphery of the mounting hole by taking the orifice pipe 1 as a circle center, wherein the expansion screws 1-3 are welded to the orifice pipe 1; the included angle between the four expansion screws 1-3 is 90 degrees.
The orifice device (3) comprises a packing box 3-1, a packing 3-3 positioned at the bottom of the packing box 3-1 and a pressing device 3-2; the outlet end of the packing box 3-1 is hermetically connected with the inlet end of the gate valve 2; one end of the pressing device 3-2 is inserted into the packing box 3-1 from the inlet end of the packing box 3-1 and is in contact with the packing 3-3; the other end of the pressing device 3-2 is connected with the inlet end of the packing box 3-1 through a bolt.
3. The diamond coring bit 4 with the outer diameter of 300mm is arranged in the orifice device 3, the rear part of the diamond coring bit 4 with the outer diameter of 300mm is sequentially connected with the drill rod 5 and the drilling machine, and the diamond coring bit 4 with the outer diameter of 300mm sequentially passes through the gate valve 2 and the orifice pipe 1 and then drills through the underground continuous wall 6; after the diamond coring bit 4 with the outer diameter of 300mm drills through the underground diaphragm wall 6, if the gushing water and mud amount of the soil layer 7 are large, cement paste or double-fluid-paste water stop is injected into the soil layer 7 through the orifice gate valve 1-1.
4. Adopting a movable one-way valve coring bit device to carry out soil layer drilling and pipe shed scaling;
4-1, installing a movable one-way valve coring bit device: as shown in FIG. 2, the mobile one-way valve coring bit device comprises a diamond coring bit 8-1 with the outer diameter of 275mm, a low-carbon seamless steel pipe 8-2 with the outer diameter of 273mm and a mobile one-way valve 8-3; the tail end of the diamond coring bit 8-1 with the outer diameter of 275mm is welded with the first end of a low-carbon seamless steel pipe 8-2 with the outer diameter of 273mm, the mobile check valve 8-3 is spot-welded in the low-carbon seamless steel pipe 8-2 with the outer diameter of 273mm, and the distance from the end opening of the second end of the low-carbon seamless steel pipe 8-2 with the outer diameter of 273mm is 100 mm; the inner diameter of the 273mm low-carbon seamless steel pipe 8-2 is 253mm, the length of the pipe is 2000mm, and the diameter of the movable one-way valve 8-3 is 250mm, and the length of the pipe is 300 mm; the tail end of the movable one-way valve 8-3 is provided with an inner screw thread 8-4, the diameter of the inner screw thread 8-4 is 76mm, and the length of the inner screw thread is 10 mm;
4-2, installing a drilling machine and drilling: as shown in fig. 3, a diamond coring bit 8-1 with the external diameter of 275mm of the mobile one-way valve coring bit device is inserted into the orifice device 3, and the second end of a low-carbon seamless steel pipe 8-2 with the external diameter of 273mm of the mobile one-way valve coring bit device is connected with a drill rod 5 through a screw thread and then drilled;
4-3, pipe shed scaling: when the drill rod 5 advances by 2000mm, removing the drill rod 5, cutting off a welding point between the movable check valve 8-3 and the low-carbon seamless steel pipe 8-2 with the outer diameter of 273mm, and polishing the cut welding point; then, connecting and welding a first end of the low-carbon seamless steel pipe 8-2 with the added ruler and the 273mm outer diameter at the cut welding point of the low-carbon seamless steel pipe 8-2 with the 273mm outer diameter through a screw thread, wherein the length of the low-carbon seamless steel pipe 8-2 with the added ruler and the 273mm outer diameter is 2000 mm;
4-4, moving the one-way valve 8-3: the drilling machine is connected with a drill rod with the diameter of 76mm, the drill rod with the diameter of 76mm is connected with the movable one-way valve 8-3 through an inner screw thread 8-4, after the connection, the drilling machine drives the drill rod with the diameter of 76mm to retreat, the movable one-way valve 8-3 retreats to a position which is 10mm away from the second end port of the low-carbon seamless steel pipe 8-2 with the diameter of 76mm, the movable one-way valve 8-3 is fixed through spot welding, and the drill rod with the diameter of 76mm retreats;
4-5, drilling a soil layer 7: the drill rod 5 is in threaded connection with the 8-2 low-carbon seamless steel pipe with the outer diameter of 273mm, and the drilling machine continues to drill normally;
4-6, repeating the steps 4-3 to 4-5 until the design position is drilled, and combining the low-carbon seamless steel pipe 8-2 with the outer diameter of 273mm with the plurality of low-carbon seamless steel pipes 8-2 with the outer diameter of 273mm with the added length to obtain the pipe shed.
5. After the pipe shed drills to the designed position, hole sealing is carried out on the end part; and after the pipe shed is drilled to the designed position, grouting is carried out in the stratum 7 through the orifice gate valve 1-2, a drilling machine is connected with the pipe shed in the grouting process, and cement slurry is conveyed to the end part of the pipe shed along with the outer wall of the low-carbon seamless steel pipe 8-2 with the outer diameter of 273mm in the rotating process of the pipe shed, so that the end part is blocked.
6. And cleaning sludge in the pipe shed, and filling the pipe shed. After the end part of the pipe shed is plugged, the movable one-way valve 8-3 is removed, and a drilling machine is connected with a roller bit with the diameter of 200mm to clean mud in the pipe shed; after the cleaning in the pipe shed is finished, mortar is conveyed through a mortar pump, and the pipe shed is filled.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (4)
1. A horizontal drilling construction method for a large-diameter pipe shed in a shallow soil-covered weak stratum is characterized by comprising the following steps:
(1) drilling a hole for positioning and drilling a mounting hole;
(2) installing a hole pipe (1) in the installation hole, wherein the flange end of the hole pipe (1) is hermetically connected with the outlet end of a gate valve (2) through a sealing gasket, and the inlet end of the gate valve (2) is connected with a hole device (3);
in the step (2), the orifice pipe (1) is a low-carbon steel seamless steel welded pipe with the outer diameter of 325mm and the length of 400mm, one end of the orifice pipe (1) is provided with a fish scale buckle with the length of 100mm, and the fish scale buckle is wound with hemp or cotton threads and then is tamped into the mounting hole; the other end of the orifice pipe (1) is a flange end, a by-pass port (1-1) is arranged on the lower wall surface of the orifice pipe (1) at a position 10cm away from the flange end of the orifice pipe (1), an orifice gate valve (1-2) is installed on the by-pass port (1-1), and the orifice pipe (1) is in fluid communication with the orifice gate valve (1-2) through the by-pass port (1-1); four expansion screws (1-3) are uniformly arranged on an underground continuous wall (6) at the periphery of the mounting hole by taking the orifice pipe (1) as a circle center, and the expansion screws (1-3) are welded to the orifice pipe (1); the included angle between the four expansion screws (1-3) is 90 degrees;
the orifice device (3) comprises a packing box (3-1), a packing (3-3) and a pressing device (3-2), wherein the packing (3-3) is positioned at the bottom of the packing box (3-1); the outlet end of the packing box (3-1) is hermetically connected with the inlet end of the gate valve (2); one end of the pressing device (3-2) is inserted into the packing box (3-1) from the inlet end of the packing box (3-1) and is in contact with the packing (3-3); the other end of the pressing device (3-2) is connected with the inlet end of the packing box (3-1) through a bolt;
(3) the diamond coring bit (4) with the outer diameter of 300mm is arranged in the orifice device (3), the rear part of the diamond coring bit (4) with the outer diameter of 300mm is sequentially connected with a drill rod (5) and a drilling machine, and the diamond coring bit (4) with the outer diameter of 300mm sequentially passes through the gate valve (2) and the orifice pipe (1) and then drills through the underground continuous wall (6);
after the diamond coring bit (4) with the outer diameter of 300mm drills through the underground diaphragm wall (6), if the water gushing and mud gushing amount of a soil layer (7) is large, cement paste or double-liquid-paste water stopping is injected into the soil layer (7) through the orifice gate valve (1-2);
(4) adopting a movable one-way valve coring bit device to carry out soil layer drilling and pipe shed scaling;
(4-1) installing a movable one-way valve coring bit device: the movable one-way valve coring bit device comprises a diamond coring bit (8-1) with the outer diameter of 275mm, a low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm and a movable one-way valve (8-3); the tail end of the diamond coring bit (8-1) with the outer diameter of 275mm is welded with the first end of a low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm, the mobile check valve (8-3) is spot-welded in the low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm, and the distance from the port of the second end of the low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm is 100 mm; the inner diameter of the low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm is 253mm, the length of the low-carbon seamless steel pipe is 2000mm, and the diameter of the movable one-way valve (8-3) is 250mm, and the length of the movable one-way valve is 300 mm; an inner screw thread (8-4) is arranged at the tail end of the movable one-way valve (8-3), the diameter of the inner screw thread (8-4) is 76mm, and the length of the inner screw thread is 10 mm;
(4-2) installing a drilling machine and drilling: inserting a diamond coring bit (8-1) with the external diameter of 275mm of the mobile one-way valve coring bit device into the orifice device (3), connecting a second end of a low-carbon seamless steel pipe (8-2) with the external diameter of 273mm of the mobile one-way valve coring bit device with a drill rod (5) through a screw thread, and then drilling;
(4-3) pipe shed ruler adding: when the drill rod (5) advances by 2000mm, the drill rod (5) is dismantled, welding points between the movable check valve (8-3) and the low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm are cut off, and the cut welding points are ground; then, connecting and welding the first end of the low-carbon seamless steel pipe (8-2) with the external diameter of 273mm through a screw thread at the cutting welding point of the low-carbon seamless steel pipe (8-2) with the external diameter of 273mm, wherein the length of the low-carbon seamless steel pipe (8-2) with the external diameter of 273mm is 2000 mm;
(4-4) moving the one-way valve (8-3): the drilling machine is connected with a drill rod with the diameter of 76mm, the drill rod with the diameter of 76mm is connected with the movable one-way valve (8-3) through an inner screw thread (8-4), after connection, the drilling machine drives the drill rod with the diameter of 76mm to retreat, the movable one-way valve (8-3) retreats to a position which is 10mm away from a second end port of the low-carbon seamless steel pipe (8-2) with the diameter of 76mm, the movable one-way valve (8-3) is fixed through spot welding, and the drill rod with the diameter of 76mm retreats;
(4-5) drilling a soil layer (7): the drill rod (5) is in threaded connection with a low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm, and the drilling machine continues to drill normally;
(4-6) repeating the steps (4-3) to (4-5) until the design position is drilled, and combining the low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm with a plurality of low-carbon seamless steel pipes (8-2) with the outer diameter of 273mm with a plurality of scales to obtain a pipe shed;
(5) after the pipe shed drills to the designed position, hole sealing is carried out on the end part;
(6) and cleaning sludge in the pipe shed, and filling the pipe shed.
2. The horizontal drilling construction method for the large-diameter pipe shed in the shallow soil-covered weak stratum according to claim 1, characterized in that in the step (1), a measurement control axis network is determined according to a design construction drawing, lofting data of a central point is calculated and rechecked, field measurement and lofting are performed after the situation is correct, lofting of all hole sites is marked, the hole sites are rechecked, and the error of opening is less than 100 mm; and drilling a mounting hole with the depth of 300cm at the determined hole opening position by adopting a diamond core bit with the outer diameter of 325mm, and taking out the diamond core bit after cutting off the steel core by using a steel wedge.
3. The horizontal drilling construction method of the large-diameter pipe shed in the shallow soil-covered weak stratum according to claim 1, characterized in that in the step (5), after the pipe shed is drilled to the designed position, the pipe shed is grouted into the stratum (7) through the gate valve (2), a drilling machine is connected with the pipe shed in the grouting process, and in the rotating process of the pipe shed, cement grout is conveyed to the end part of the pipe shed along with the outer wall of a low-carbon seamless steel pipe (8-2) with the outer diameter of 273mm to achieve the purpose of blocking the end part.
4. The horizontal drilling construction method of the large-diameter pipe shed in the shallow soil-covered weak stratum according to claim 3, wherein in the step (6), after the end part of the pipe shed is plugged, the movable check valve (8-3) is removed, a drilling machine is connected with a roller bit with the diameter of 200mm, and mud residue in the pipe shed is cleaned;
after the cleaning in the pipe shed is finished, mortar is conveyed through a mortar pump, and the pipe shed is filled.
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| CN112664200B (en) * | 2020-11-08 | 2023-04-07 | 上海市隧道工程轨道交通设计研究院 | Method for drilling horizontal freezing hole under complex working condition |
| CN112878909A (en) * | 2020-12-24 | 2021-06-01 | 南昌轨道交通集团有限公司 | Anti-gushing method for drilling horizontal freezing hole of foundation pit |
| CN112796699A (en) * | 2020-12-29 | 2021-05-14 | 中煤隧道工程有限公司 | High-pressure blowout preventer with emergency plugging cabin and installation and use methods |
| CN113585969A (en) * | 2021-08-19 | 2021-11-02 | 北京中煤矿山工程有限公司 | Pressure-maintaining drilling method for shallow-soil-covering water-rich sandy-pebble stratum by long-distance horizontal freezing of drilling mud |
| CN115306300B (en) * | 2022-08-22 | 2023-05-12 | 苏州大学 | Horizontal long-distance obstacle removing device and omnibearing high-pressure injection grouting method |
| CN115898367B (en) * | 2022-11-08 | 2023-10-03 | 四川省金钻地质矿产勘探工程有限责任公司 | Measurement device for advanced geological forecast drilling of tunnel and application method thereof |
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