CN213654797U - Compact mud circulating system for reverse circulation drilling machine - Google Patents
Compact mud circulating system for reverse circulation drilling machine Download PDFInfo
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- CN213654797U CN213654797U CN202022643623.4U CN202022643623U CN213654797U CN 213654797 U CN213654797 U CN 213654797U CN 202022643623 U CN202022643623 U CN 202022643623U CN 213654797 U CN213654797 U CN 213654797U
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Abstract
The utility model discloses a compact mud circulation system for reverse circulation drilling machine uses the shaft in the tunnel to set up mud pit and sedimentation tank, and mud pit and sedimentation tank adopt the filtration steel sheet to separate, and mud preparation is gone on in the sedimentation tank, and mud pit installation slush pump connects mud conveyer pipe to rig department, lays the baffle around the rig after the anti-soaking measure is accomplished to prevent that mud is excessive. The slurry is prepared by mechanically stirring, and after slurry is prepared, the slurry is detected by a slurry proportion instrument, a funnel method and a sand content measuring instrument. The mud discharged in the drilling process is firstly collected in a vertical shaft sedimentation tank, the mud is filtered by the sedimentation tank and then reused, and the filtered waste residue is lifted to a waste residue field for treatment. The system has a compact structure, realizes the reduction of the waste of field space, can be used for simultaneously constructing a plurality of drilling machines, and improves the working efficiency of the reverse circulation drilling machine.
Description
Technical Field
The utility model relates to a drilling bored concrete pile mud circulation technique especially relates to a mud circulation system is used in construction of reverse circulation rig.
Background
The cast-in-place bored pile has strong technical practicability and low cost, and the reverse circulation drilling machine is widely applied to the construction of large-scale construction pile foundations such as airports, subways, roads and the like as drilling equipment suitable for large-scale cast-in-place pile foundations. The reverse circulation drilling machine as a mature construction process of the cast-in-situ bored pile has wide stratum adaptability, small volume and low noise, and can be constructed in narrow places or tunnels and busy places in the center of the market.
At present, a commonly used underground excavation station slurry circulation system is mainly characterized in that a slurry pool and a sedimentation pool are built in a tunnel. The method has the advantages of large occupied space, unfixed position, more moving times, inconvenience for simultaneous use of a plurality of drilling machines, manual cleaning of waste slag in the sedimentation tank, low construction efficiency and high construction cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reverse circulation compact mud circulation system for rig. Can combine the engineering actual conditions, reverse circulation rig adopts this system in the subway tunnel, has practiced thrift the place, can realize the synchronous construction of many rigs, has avoided unnecessary construction machinery to apply, has improved the efficiency of construction, satisfies the construction requirement of bored concrete pile.
The utility model aims at realizing through the following technical scheme:
the utility model discloses a compact mud circulation system for reverse circulation drilling machine, including mud pit and sedimentation tank, sedimentation tank and mud pit set up in the bottom of tunnel shaft side by side, separate through filtering the steel sheet between sedimentation tank and the mud pit;
a sand pump is arranged at a slag discharge port of the reverse circulation drilling machine, and an outlet of the sand pump is connected to the sedimentation tank through a slag discharge pipeline;
and a mud pump is arranged in the mud pool, and an outlet of the mud pump is connected to the reverse circulation drilling machine through a conveying pipeline.
By the above-mentioned the technical scheme provided by the utility model, the embodiment of the utility model provides a compact mud circulation system for reverse circulation drilling machine adopts two pond methods in a well, utilizes the shaft to set up mud pond and sedimentation tank, and the exhaust mud at first collects in the shaft sedimentation tank among the drilling process, filters back reuse with mud through the sedimentation tank, and the waste residue handling of filtering out is handled to abandoning the slag yard. And a mud pit and a sedimentation tank built in the tunnel are eliminated, the problem of low construction efficiency due to narrow site is solved, and the simultaneous, rapid and efficient construction of a plurality of drilling machines is realized.
Drawings
Fig. 1 is a schematic cross-sectional view of a compact mud circulation system for a reverse circulation drilling machine according to an embodiment of the present invention;
fig. 2 is a schematic plan view of a compact mud circulation system for a reverse circulation drilling machine according to an embodiment of the present invention.
Detailed Description
Embodiments of the invention will be described in further detail below. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
Utility model discloses a compact mud circulation system for reverse circulation drilling machine, the concrete implementation mode of its preferred is:
the device comprises a mud pit and a sedimentation pit, wherein the sedimentation pit and the mud pit are arranged at the bottom of a tunnel vertical shaft side by side, and the sedimentation pit and the mud pit are separated by a filter steel plate;
a sand pump is arranged at a slag discharge port of the reverse circulation drilling machine, and an outlet of the sand pump is connected to the sedimentation tank through a slag discharge pipeline;
and a mud pump is arranged in the mud pool, and an outlet of the mud pump is connected to the reverse circulation drilling machine through a conveying pipeline.
And baffles are arranged around the reverse circulation drilling machine, and gaps between the baffles and the wall of the pilot tunnel are sealed by sandbags or bentonite.
The utility model discloses a compact mud circulation system for reverse circulation drilling machine adopts two ponds of a well method, utilizes the shaft to set up mud pit and sedimentation tank, mud pit and sedimentation tank adopt the filtration steel sheet to separate, mud preparation is gone on in the sedimentation tank, mud pit installation slush pump connects mud conveyer pipe to rig department, lay the baffle around the rig after anti-soaking measure is accomplished, the back is accomplished in the baffle installation, it is tight with the clearance seal between baffle and the pilot tunnel wall to use sand bag or bentonite to prevent that mud is excessive. The mud discharged in the drilling process is firstly collected in a vertical shaft sedimentation tank, the mud is filtered by the sedimentation tank and then reused, and the filtered waste residue is lifted to a waste residue field for treatment. And a mud pit and a sedimentation tank built in the tunnel are eliminated, the problem of low construction efficiency due to narrow site is solved, and the simultaneous, rapid and efficient construction of a plurality of drilling machines is realized.
The specific embodiment is as shown in fig. 1 and fig. 2:
firstly, coating a layer of waterproof mortar on a vertical shaft wall, wherein the thickness of the waterproof mortar layer is 1cm, performing anti-seepage treatment, welding steel plates around the bottom of the vertical shaft and leveling, manufacturing a filtering steel plate by adopting a steel plate with the thickness of 3mm, wherein the size of the filtering steel plate is 5m x 10m, drilling slurry overflowing holes with the diameter of 50@150 x 150mm by using the steel plate, manufacturing the filtering steel plate and welding the filtering steel plate to a vertical shaft I-shaped steel butt joint position to separate a sedimentation tank and a slurry tank, wherein the size of the slurry tank is 2m x 5m 10m, the size of the sedimentation tank is 5m x 5m 10m, arranging a slurry pump in the slurry tank, installing a conveying pipeline and preparing slurry in the sedimentation tank.
And the slurry pump is lifted into the shaft by a gantry crane and suspended to a position 8m away from the bottom of the shaft. And fixedly hanging the hoisting ropes to the I-shaped steel part of the wall of the vertical shaft by using the hoisting ropes. And hoisting the phi 300 steel pipe to the underground by using a gantry crane to be connected with a slurry pump, and manually laying and installing a pipeline slurry outlet at the construction position of a drilling machine.
After the drilling machine is accurately positioned, a slag discharge pipeline is installed, a phi 300 steel pipe is connected with a slag discharge port of the drilling machine, and a pipeline slag discharge port is manually paved and installed at a vertical shaft sedimentation tank; installing a baffle to manufacture a cofferdam, starting a slurry pump to continuously store slurry in the cofferdam, starting a sand pump to discharge waste slurry after a drilling machine drills, carrying out waste residue lifting after working for a period of time, and circulating the settled clear liquid.
According to the engineering geological condition, bentonite is preferably selected for making slurry, then high-quality clay is selected for making slurry, and Na is doped when necessary2CO3Soda ash and other additives. The bentonite blocks are firstly smashed before pulping, so that the bentonite blocks are easy to form pulp during stirring, the stirring time is shortened, and the slurry quality is improved; mechanical stirring is adopted for pulping, during stirring, a certain amount of water is added into a sedimentation tank, then bentonite corresponding to the water amount is slowly added, and a machine is started for stirring; after the slurry is formed, testing and detecting the slurry by adopting a slurry proportion instrument, a funnel method and a sand content measuring instrument, and placing the slurry into a slurry pool after the detection is qualified. During drilling, slurry samples are collected frequently, performance indexes are measured, circulating water is used for continuously replenishing slurry with certain consistency into holes, and water head pressure is maintained.
Waste slurry treatment: the mud discharged in the drilling process is firstly collected in the vertical shaft, the mud is filtered by the filter steel plate and then reused, and the filtered waste residues are hoisted to a waste residue field for treatment.
Fully paving a guide tunnel bottom plate and a 50cm high side wall within the range of 5m in front of and behind the drilling machine by using a modified asphalt waterproof coiled material as a waterproof layer to prevent slurry from soaking a primary support structure of a tunnel main body; after the tunnel anti-soaking measures are implemented, baffles with the same width as the small pilot tunnel are arranged in front of and behind the drilling machine, the height of each baffle is 50cm, and after the baffles are installed, a sand bag or bentonite is used for tightly sealing a gap between each baffle and the wall of the pilot tunnel so as to prevent slurry from overflowing.
Before the drilling machine starts drilling, a slurry pump is started in advance, and sufficient slurry is stored in the cofferdam to meet the use amount of drilling slurry; manually adjusting the slurry storage amount according to the actual condition in the drilling process of the drilling machine; when the drilling is started, the drilling footage is properly controlled, and the low-grade slow drilling is carried out at the position of the protecting wall foot, so that the position of the blade foot is provided with a firm mud protecting wall. Drilling to 1 m below the blade foot, and then drilling at normal speed according to the soil condition; when the drill rod is connected, the drilling is stopped, the drilling tool is lifted to about 20cm away from the bottom of the hole, the circulation of flushing liquid is maintained for 1-2 minutes to clean the bottom of the hole and completely discharge drilling slag in the pipeline, and then the pump is stopped to connect the drill rod. The drill rod connection should be screwed up firmly to prevent bolts, nuts, screwing tools and the like from falling into the holes.
A slurry pumping pipe is arranged in the middle of the reverse circulation drill bit, and is matched with a sand pump to pump slurry while drilling; the pumped mud and the drilling slag are discharged to a sedimentation tank of the vertical shaft through a pipeline. And fishing out the waste stone slag discharged into the sedimentation tank by using a vertical shaft gantry crane grab bucket and vertically transporting the waste stone slag to a soil bin. During the drilling process, the viscosity and the relative density of the slurry are measured every 2 hours, and corresponding treatment measures are made according to the change of the components of the slurry.
The utility model has the advantages as follows:
the utility model provides a compact mud circulation system is used in reverse circulation reduces the extravagant, the synchronous construction of many rigs in narrow and small space in place, reduces construction machinery's removal number of times to improve the efficiency of construction.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. The compact type slurry circulation system for the reverse circulation drilling machine is characterized by comprising a slurry tank and a sedimentation tank, wherein the sedimentation tank and the slurry tank are arranged at the bottom of a tunnel vertical shaft side by side and are separated by a filter steel plate;
a sand pump is arranged at a slag discharge port of the reverse circulation drilling machine, and an outlet of the sand pump is connected to the sedimentation tank through a slag discharge pipeline;
and a mud pump is arranged in the mud pool, and an outlet of the mud pump is connected to the reverse circulation drilling machine through a conveying pipeline.
2. The compact mud circulation system for the reverse circulation drilling machine according to claim 1, wherein a baffle is installed around the reverse circulation drilling machine, and a gap between the baffle and the wall of the pilot tunnel is closed by a sand bag or bentonite.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022643623.4U CN213654797U (en) | 2020-11-16 | 2020-11-16 | Compact mud circulating system for reverse circulation drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022643623.4U CN213654797U (en) | 2020-11-16 | 2020-11-16 | Compact mud circulating system for reverse circulation drilling machine |
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| CN213654797U true CN213654797U (en) | 2021-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638859A (en) * | 2021-09-07 | 2021-11-12 | 中建隧道建设有限公司 | Mud circulation and pumping system suitable for TBM tunnel construction |
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2020
- 2020-11-16 CN CN202022643623.4U patent/CN213654797U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638859A (en) * | 2021-09-07 | 2021-11-12 | 中建隧道建设有限公司 | Mud circulation and pumping system suitable for TBM tunnel construction |
| CN113638859B (en) * | 2021-09-07 | 2023-02-03 | 中建隧道建设有限公司 | Mud circulation and pumping system suitable for TBM tunnel construction |
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