CN111594175B - Hole forming construction method of rotary drilling rig adopting chemical polymer slurry retaining wall - Google Patents
Hole forming construction method of rotary drilling rig adopting chemical polymer slurry retaining wall Download PDFInfo
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- CN111594175B CN111594175B CN202010419262.7A CN202010419262A CN111594175B CN 111594175 B CN111594175 B CN 111594175B CN 202010419262 A CN202010419262 A CN 202010419262A CN 111594175 B CN111594175 B CN 111594175B
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- 238000005553 drilling Methods 0.000 title claims abstract description 83
- 239000002002 slurry Substances 0.000 title claims abstract description 69
- 229920000642 polymer Polymers 0.000 title claims abstract description 47
- 239000000126 substance Substances 0.000 title claims abstract description 38
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 235000017550 sodium carbonate Nutrition 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 2
- 239000004576 sand Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 11
- 238000005520 cutting process Methods 0.000 description 7
- 238000012856 packing Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a rotary drilling rig pore-forming construction method adopting a chemical polymer slurry retaining wall, which comprises the following steps: s1: leveling the field; s2: arranging a mud pit and a mud residue storage area to prepare chemical polymer mud; s3: pile position lofting; s4: drilling a hole in place by a rotary drilling rig; s5: embedding and injecting chemical polymer slurry into the pile casing; s6: drilling and cleaning holes by using the rotary drilling machine. Compared with the prior art, the rotary drilling rig pore-forming construction method adopting the chemical polymer slurry retaining wall has the advantages that the slurry preparation time is short, and the use is convenient; the hole wall has thin mud skin, good wall protection effect and accurate aperture control, can reduce the rotary digging soil output and concrete pouring amount, and saves materials and mechanical shift cost; the slurry of the slurry has low sand content, can be self-cleaned and can be self-separated from concrete; the mud is pollution-free, does not produce the waste mud, can recycle.
Description
Technical Field
The invention relates to a drilling process, in particular to a hole forming construction method of a rotary drilling rig adopting chemical polymer slurry wall protection.
Background
The construction of the drilling pile in China traditionally adopts bentonite slurry to protect the wall, and a hole is formed by drilling in a rotary drill or a percussion drill, and the process has the advantages of low working efficiency, large quantity of slurry materials, high cost, large occupied area and serious pollution. In order to overcome the defects, in 2006, the construction process of the chemical polymer slurry wall protection rotary drilling and hole forming is introduced to China from the United states, and after digestion and absorption, the construction process is used for engineering practice, and has the advantages of high pile forming speed, good quality, accurate aperture control, low noise, low pollution, convenience in moving and positioning, small construction occupied area and the like, so that the working efficiency of the cast-in-situ bored pile is greatly improved, the engineering cost is reduced, and the use effect is good. It still has room for improvement. In view of the above, through intensive research, the inventor of the present application obtains a hole forming construction method for a rotary drilling rig using a chemical polymer slurry wall protection.
Disclosure of Invention
The invention aims to provide a hole forming construction method of a rotary drilling rig adopting a chemical polymer slurry retaining wall, which has the advantage of good hole forming effect.
The technical purpose of the invention is realized by the following technical scheme:
a rotary drilling rig pore-forming construction method adopting chemical polymer slurry dado comprises the following steps:
s1: leveling the field;
s2: arranging a mud pit and a mud residue storage area to prepare chemical polymer mud;
s3: pile position lofting;
s4: drilling a hole in place by a rotary drilling rig;
s5: embedding and injecting chemical polymer slurry into the pile casing;
s6: drilling and cleaning holes by using the rotary drilling machine.
In a further improvement, the chemical polymer slurry comprises 190000-210000 parts by weight of water, 7-9 parts by weight of cispont Shore Pac, and 4-6 parts by weight of soda ash.
In a further improvement, the step S2 includes:
t1: arranging a mud and sludge storage area;
t2: testing the pH value of a water source;
t3: and injecting water into the mud pit, connecting a high-pressure pump with a rubber pipe to a jet flow slurry stirrer, injecting the Shuibang Shore Pac and the soda into the jet flow slurry stirrer, injecting the water solution in the mud pit back into the mud pit through the jet flow slurry stirrer, and preliminarily mixing the Shuibang Shore Pac, the soda and the water solution injected into the jet flow slurry stirrer. The high-pressure air spoiler is arranged in the mud pit, under the action of high-pressure airflow, high polymers in the polymer solution are fully dissolved, the viscosity is continuously improved, and the high-pressure pump and the jet flow slurry stirrer stop working after the polymers injected into the jet flow slurry stirrer reach a specified amount.
In a further improvement, the high-pressure air spoiler comprises a plurality of injection units, each injection unit comprises an injector and an air inlet plate, the air inlet plates are horizontally arranged and are arranged in a hollow structure, each injector comprises an elastic supporting piece, a spray head and a connecting hose, the elastic supporting pieces are arranged on the air inlet plates, the spray heads are arranged on the elastic supporting pieces and are supported by the elastic supporting pieces, one end of each connecting hose is connected with the spray heads, and the other end of each connecting hose is connected with the inside of the air inlet plate.
In a further improvement, the elastic support member comprises a first support spring, a second support spring, a first connecting piece and a second connecting piece, the first support spring and the second support spring are vertically fixed on the air inlet plate, the first connecting piece is fixed at the upper end of the first support spring and is fixedly connected with the spray head, and the second connecting piece is fixed at the upper end of the second support spring and is fixedly connected with the spray head.
In a further improvement, the first connecting piece and the second connecting piece are arranged in a block shape, a rod shape or a sheet shape.
In a further improvement, the plurality of injection units are arranged in a rectangular array.
Further improvement, the injection unit still includes the divertor, the divertor includes support column, draft tube, auger, pivot and guide vane, the support column is fixed in on the inlet plate, the draft tube is fixed in the upper end of support column, the upper end of draft tube is equipped with the support, the pivot is vertical to be passed the support, and quilt the support rotates the support, with the support distinguishes for the demarcation point the first half and the latter half of pivot, guide vane locates the first half of pivot, the auger is located the latter half of pivot.
In a further improvement, the auger enables the liquid to flow downwards in the rotating process.
In a further improvement, the supporting column and the guide shell are all of a hollow structure, the supporting column, the guide shell and the air inlet plate are communicated, and a plurality of vent holes are formed in the inner wall of the guide shell.
Compared with the prior art, the rotary drilling rig pore-forming construction method adopting the chemical polymer slurry retaining wall has the advantages that the slurry preparation time is short, and the use is convenient; the hole wall has thin mud skin, good wall protection effect and accurate aperture control, can reduce the rotary digging soil output and concrete pouring amount, and saves materials and mechanical shift cost; the slurry of the slurry has low sand content, can be self-cleaned and can be self-separated from concrete; the mud is pollution-free, does not produce the waste mud, can recycle.
Drawings
FIG. 1 is a process flow diagram of a rotary drilling rig hole forming construction method adopting chemical polymer slurry wall protection.
FIG. 2 is a schematic structural diagram of a high-pressure air spoiler applied to the hole forming construction method of the rotary drilling rig adopting the chemical polymer slurry retaining wall.
In the drawings
An air inlet plate-1; a spray head-2; a connecting hose-3; a first support spring-4; a second support spring-5; a first connecting member 6; a second connecting member-7; a support column-8; a guide shell-9; a packing auger-10; a rotating shaft-11; guide vanes-12; a bracket-13.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
As shown in fig. 1, a method for constructing a hole by a rotary drilling rig using a chemical polymer slurry dado comprises the following steps:
s1: leveling the field: the construction method is characterized in that the ground is leveled and rolled according to ground level arrangement before construction, sufficient bearing capacity of the foundation is guaranteed, the driving requirements of a rotary drilling rig and a slag transport vehicle are met, meanwhile, obstacle clearing work needs to be completed, the obstacle clearing work needs to be completed once around a pile position, and surface impurities, underground impurities and the like in a construction area are cleared.
S2: setting a mud pit and a mud residue storage area, and preparing chemical polymer mud: the mud storage area is used for storing mud dug out by the rotary drilling rig so as to avoid pollution, the volume of the mud pit is determined by calculation according to the volume of a drilled hole, and the wall and the bottom of the pit are coated with cement mortar.
S3: pile position lofting: and (3) before drilling, using a total station to release pile sites by adopting a pile-by-pile coordinate method, setting guard piles around the pile sites after lofting and retesting, wherein the error is controlled within 5 mm.
S4: drilling a hole on the rotary drilling rig in place: the rotary drilling rig is in place by using the self-walking moving system, the left track shoe and the right track shoe of the main machine are positioned on the same horizontal plane, the construction direction of the power head is parallel to the direction of the track shoes, the cutting direction can not be vertical, and the front, back, left and right horizontal positions of the machine body are well adjusted before drilling. And then, aligning the drill bit and the pile position by matching the rotary drilling rig operator with a measurer, wherein the alignment error is less than 2 mm.
The electronic control system of the rotary drilling rig mainly comprises an engine and pump electronic control system, a mast verticality automatic leveling system, a PLC function control system and the like. The mast verticality automatic leveling system can monitor the mast in real time, automatically adjust the angle within a certain angle range, and guarantee the verticality requirement of a pile hole in construction. Meanwhile, the PLC function control system can realize the functions of monitoring and adjusting the drilling depth, automatically positioning the rotation, switching the function mode, automatically limiting the working device and the like.
The rotary drilling rig realizes the accurate control of indexes such as hole site, verticality and depth of the drilled hole through the measures, and is reliable and efficient.
After the rotary drilling rig is positioned and centered, holes can be formed in the position where the pile casings need to be buried, and the depth of the holes is determined according to the burying depth of the pile casings so as to meet the requirement of burying the pile casings.
S5: and (3) embedding and injecting chemical polymer slurry in the casing: the inner diameter of the protecting cylinder is preferably larger than the aperture by 200mm, and when the underground water level is deeper, the length of the protecting cylinder is preferably 1.5 m. The pile casing is made of a 5mm steel plate, stiffening ribs are respectively added on the upper part, the middle part and the lower part of the pile casing, two lifting rings are welded at the top end, one lifting ring is used for lifting, a steel reinforcement cage hanging rod is used for binding, the upward floating of a steel reinforcement cage is suppressed, four grooves are simultaneously and orthogonally carved at the top end of the pile casing so as to be convenient for hanging cross lines for testing the pile casing and the holes, and 2 slurry overflow holes are formed in the upper part of the pile casing so as to be convenient for slurry overflow and recycle; the pile casing is accurately and stably embedded, the deviation between the center of the pile casing and the center of a pile position is not larger than 5mm, the pile casing is fixed at the correct position after calibration, chemical polymer slurry is filled into the pile casing after the pile casing is embedded and the opening of the pile casing is 20-30 cm higher than the ground until the pile casing is filled, and the slurry is continuously supplemented in the rotary drilling process to ensure the water head height in the hole.
S6: drilling and cleaning holes by using a rotary drilling machine: before drilling, the drilling machine is leveled, and the drilling machine is kept to be vertical and stable. After the casing is filled with the slurry, drilling is started, the slurry is continuously supplemented in the drilling process, the water head height is kept to be 1/2 of the casing height, and hole collapse is prevented.
The lifting speed of the drilling tool is controlled, and particularly, the disturbance to the chemical polymer slurry is reduced as much as possible when the drilling tool is used for drilling in and out the hole and primary lifting, so that the settlement of drill cuttings in the slurry is accelerated, and the stability of the hole wall is facilitated.
Adopting different types of rotary drilling rig drill bits for construction under different geological conditions: the fine sand, the medium sand, the gravel sand, the angle gravel soil, the round gravel soil and the strong weathering layer can adopt a cylinder type drill bit; adopting a short spiral rock-socketed drill bit for geology with uneven strength, geology with easy deviated holes, weathered and stroke-induced rock strata; the rock geology with uneven rock stratum hardness, boulders and higher compressive strength adopts a barrel type rock-socketed drill bit.
The short spiral rock-socketed drill bit has limited slag discharging capacity, and a cylindrical drill bit is used instead during slag discharging.
And after the drill stem is filled with the drilling slag, stopping pressing and rotating, rotating the power head in the anticlockwise direction, slightly sending downwards, and closing the drill bit to rotate the bottom cover. And the drilling bucket is lifted slowly to avoid the drill bit from colliding with the hole wall. After the drill hole is lifted away from the drill hole, the drilling machine rotates to the position of the dump truck, the power head is used for jacking the ejector rod, the bottom cover is opened, and the drill slag is dumped. And then closing the bottom cover, screwing back the hole site, aligning the hole site, slowly placing the drilling bucket to the bottom of the hole for drilling, and repeating the steps. When the drilling rod is jumped, the drilling machine shakes, the drilling machine does not advance to the chi and other abnormal conditions occur, the machine is stopped immediately to carry out drilling and checking, and the drilling machine is drilled after the reason is found out and the drilling machine is properly processed until the drilling machine reaches the designed depth.
Different from bentonite slurry carrying drill cuttings, the chemical polymer slurry mainly rapidly deposits the drill cuttings in the hole, so in the later stage of drilling, in order to ensure that the drill cuttings in the hole are fully deposited, the drilling speed is properly slowed down or the chemical polymer slurry is still for about half an hour, and the drill cuttings are fished out together after being completely deposited. When the drill reaches the designed elevation, the barrel-shaped drill with the valve is used for cleaning sediments, namely, the hole is cleaned at one time. In addition, due to the performance advantage of the rapid precipitation of the drill cuttings of the chemical polymer mud, the thickness of the sediment measured after the steel reinforcement cage is hoisted rarely exceeds 10cm, and if the thickness of the sediment meets the design and specification requirements, secondary hole cleaning is not needed. However, if the sediment thickness exceeds the requirement for various reasons, secondary hole cleaning is required.
And (4) taking out the drill bit after cleaning the hole, carrying out detection on the aperture, the hole depth and the verticality by quality inspectors and supervisory engineers, removing the drilling machine after acceptance, covering a cover plate, and carrying out next procedure construction.
By adopting the construction method, the time for preparing the slurry is short, and the use is convenient; the hole wall has thin mud skin, good wall protection effect and accurate aperture control, can reduce the rotary digging soil output and concrete pouring amount, and saves materials and mechanical shift cost; the slurry of the slurry has low sand content, can be self-cleaned and can be self-separated from concrete; the mud is pollution-free, does not produce the waste mud, can recycle.
The rotary drilling rig adopts a cylindrical drill bit to form a hole, the drill rod is hydraulically telescopic and is connected with the drill bit, the drill can be quickly lowered and lifted, the drilling speed is high, soil cut by the bucket teeth is directly loaded into the cylindrical container by utilizing the rotation of the drill rod and the drilling bucket and then lifted by the drill rod, and the construction efficiency is high.
The rotary drilling rig usually adopts a crawler-type walking system, is convenient to move and only needs a few minutes to be in place, and is integrally arranged on a crawler to perform drilling operation.
The rotary drilling rig finishes the walking movement and the drilling pore-forming work of the drilling rig by the power output by a diesel engine, and does not need to provide a high-power supply additionally.
The self stability of the rotary drilling rig is adjusted by a chassis telescopic crawler belt, the perpendicularity of the machine body, the perpendicularity of a drill rod and the perpendicularity of a formed hole are all controlled by an electronic monitoring element, an operator can directly read the stability, and the operation is simple and convenient
The chemical polymer slurries used in this example are non-toxic and readily degradable. Before discharge, the solution can be treated by 5 percent sodium hypochlorite solution or 3 percent hydrogen peroxide solution. After a certain amount of treating agent is added during treatment, a slurry pump is used for circulating all the slurry to be treated to ensure that the slurry is fully oxidized. The treated mud is environment-friendly and harmless and can be directly discharged into nearby drainage ditches or water channels.
The chemical polymer slurry comprises 190000-:
the step S2 includes:
t1: and a mud and sludge storage area is arranged.
T2: testing the pH value of a water source: before preparing the slurry, pH test paper is used for testing the pH value of a prepared water source, and a small amount of soda ash (the addition amount of the soda ash is generally 0.5 kg/m) is added according to specific conditions3And the specific addition is determined according to the field pH value test result), the pH value of the slurry system is adjusted to 8-10, and the influence on the slurry performance caused by the water source problem is reduced.
T3: and injecting water into the mud pit, connecting a high-pressure pump with a rubber pipe to a jet flow slurry stirrer, injecting the Shuibang Shore Pac and the soda into the jet flow slurry stirrer, injecting the water solution in the mud pit back into the mud pit through the jet flow slurry stirrer, and preliminarily mixing the Shuibang Shore Pac, the soda and the water solution injected into the jet flow slurry stirrer. The high-pressure air spoiler is arranged in the mud pit, under the action of high-pressure airflow, high polymers in the polymer solution are fully dissolved, the viscosity is continuously improved, and the high-pressure pump and the jet flow slurry stirrer stop working after the polymers injected into the jet flow slurry stirrer reach a specified amount.
After the manufacture is finished, corresponding performance tests are required to be carried out, and the performance indexes are as follows:
for the best use effect, the preparation proportion of the chemical polymer slurry should be determined according to different geological conditions, and the approximate range of suggested values is as follows:
| formation conditions | Shunbang Shore Pac (kg/m3) | Viscosity/s |
| Clay and shale | 0.4～0.8 | 27～35 |
| Silt, fine to medium sand | 0.4～1.1 | 27～45 |
| Coarse sand, smaller gravel | 0.6～1.5 | 30～50 |
| Gravel and egg | 1.1～1.8 | 35～55 |
The above proportions are used as reference, and the performance index of the slurry is tested in time during on-site preparation and is adjusted in time to meet the requirements.
As shown in fig. 2, the high-pressure air spoiler comprises a plurality of injection units, each injection unit comprises an injector and an air inlet plate 1, the air inlet plate 1 is horizontally arranged and is arranged in a hollow structure, an air inlet is arranged on the air inlet plate, each injector comprises an elastic support part, a spray head 2 and a connecting hose 3, the elastic support part is arranged on the air inlet plate 1, the spray head 2 is arranged on the elastic support part and is supported by the elastic support part, one end of the connecting hose 3 is connected with the spray head 2, and the other end of the connecting hose is connected with the inside of the air inlet plate 1. Under above-mentioned structural setting, high-pressure gas gets into air inlet plate 1 from the air inlet, then passes through from 2 blowout of shower nozzle behind the coupling hose 3, because shower nozzle 2 is supported by elastic support, at the in-process of work, shower nozzle 2 will constantly take place the swing to produce the random flow, can effectively promote mixing efficiency, shorten the jet-propelled time, thereby promote holistic work efficiency, reduce engineering time, practice thrift construction cost.
Specifically, the elastic support member includes a first support spring 4, a second support spring 5, a first connecting member 6 and a second connecting member 7, the first support spring 4 and the second support spring 5 are vertically fixed on the intake plate 1, the first connecting member 6 is fixed at the upper end of the first support spring 4 and is fixedly connected with the nozzle 2, and the second connecting member 7 is fixed at the upper end of the second support spring 5 and is fixedly connected with the nozzle 2. The first supporting spring 4 and the second supporting spring 5 provide good elastic support, so that the spray head 2 can generate swing motion, and the first connecting piece 6 and the second connecting piece 7 can be connected with the spray head 2 in a welding manner.
Specifically, the first connecting member 6 and the second connecting member 7 are provided in a block shape, a rod shape, or a sheet shape.
Since the mud pit is generally arranged in a rectangular shape, the plurality of injection units are arranged in a rectangular array.
In order to further promote work efficiency, the injection unit still includes the divertor, the divertor includes support column 8, draft tube 9, auger 10, pivot 11 and guide vane 12, support column 8 is fixed in on the inlet plate 1, draft tube 9 is fixed in the upper end of support column 8, the upper end of draft tube 9 is equipped with support 13, pivot 11 is vertical to be passed support 13, and quilt support 13 rotates the support, with support 13 distinguishes for the boundary point the first half and the latter half of pivot 11, guide vane 12 locates the first half of pivot 11, auger 10 locates the latter half of pivot 11.
Under the structure, the gas sprayed by the spray head 2 drives the liquid to flow upwards while moving upwards, so as to drive the guide vane 12 to rotate around the rotating shaft 11, when the rotating shaft 11 rotates, the packing auger 10 is driven to rotate, and the packing auger 10 drives the liquid flow to flow through the guide cylinder 9 in the rotating process, so that a good mixing effect is generated.
In order to further improve the working efficiency, the auger 10 enables the liquid to flow downwards in the rotating process, namely the conveying directions of the guide vane 12 and the auger 10 are opposite. Under the structure, under the action of the spray head 2, liquid flows upwards to drive the guide vane 12 to rotate, when the guide vane 12 rotates, the linkage packing auger 10 rotates, the packing auger 10 drives the liquid flow to pass through the guide cylinder 9 from top to bottom, so that upward liquid flow and downward liquid flow are generated in the mud pit, and the upward liquid flow and the downward liquid flow are collided and mixed with each other, thereby effectively improving the stirring efficiency.
Specifically, the support column 8 and the guide shell 9 are all arranged to be hollow structures, the support column 8, the guide shell 9 and the air inlet plate 1 are communicated, and a plurality of vent holes are formed in the inner wall of the guide shell 9. In the process of work, blowout gas in the air vent mixes with the liquid stream that flows through draft tube 9, because the inner space of draft tube 9 is narrow and small relatively, can realize the impact of air to the liquid stream more strongly to effectively promote mixing efficiency, shorten operating time.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.
The foregoing description of the embodiments is provided to facilitate an understanding and use of the invention and it will be apparent to those skilled in the art that various modifications to the embodiments and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (7)
1. A rotary drilling rig pore-forming construction method adopting chemical polymer slurry dado is characterized by comprising the following steps:
s1: leveling the field;
s2: arranging a mud pit and a mud residue storage area to prepare chemical polymer mud;
s3: pile position lofting;
s4: drilling a hole in place by a rotary drilling rig;
s5: embedding and injecting chemical polymer slurry into the pile casing;
s6: drilling and cleaning holes by a rotary drilling machine;
wherein, step S2 includes the following substeps:
t1: arranging a mud and sludge storage area;
t2: testing the pH value of a water source;
t3: injecting water into the mud pit, connecting a rubber pipe for a high-pressure pump with a jet flow agitator, injecting Shubang Shorpac and sodium carbonate into the jet flow agitator, injecting the water solution in the mud pit back into the mud pit through the jet flow agitator, and preliminarily mixing the Shubang Shorpac, the sodium carbonate and the water solution injected into the jet flow agitator; a high-pressure air spoiler is arranged in the mud pit, under the action of high-pressure airflow, high polymers in the polymer solution are fully dissolved, the viscosity is continuously improved, and the high-pressure pump and the jet flow slurry stirrer stop working after the polymer injected into the jet flow slurry stirrer reaches a specified amount;
the high-pressure air spoiler comprises a plurality of injection units, each injection unit comprises an injector, an air inlet plate and a fluid director, each fluid director comprises a support column, a guide cylinder, an auger, a rotating shaft and guide vanes, each support column is fixed on the corresponding air inlet plate, each guide cylinder is fixed at the upper end of each support column, a support is arranged at the upper end of each guide cylinder, each rotating shaft vertically penetrates through the corresponding support and is rotatably supported by the corresponding support, the upper half part and the lower half part of each rotating shaft are distinguished by taking the corresponding support as a dividing point, each guide vane is arranged on the upper half part of each rotating shaft, and each auger is arranged on the lower half part of each rotating shaft;
the auger makes liquid flow downwards in the rotating process.
2. The method for constructing the hole by the rotary drilling rig adopting the chemical polymer mud for protecting the wall as claimed in claim 1, wherein the chemical polymer mud comprises 190000-210000 parts by weight of water, 7-9 parts by weight of Shubang Shorpac and 4-6 parts by weight of soda ash.
3. The method for constructing the hole by the rotary drilling rig adopting the chemical polymer slurry retaining wall according to claim 2, wherein the air inlet plate is horizontally arranged and is arranged in a hollow structure, the ejector comprises an elastic supporting piece, a spray head and a connecting hose, the elastic supporting piece is arranged on the air inlet plate, the spray head is arranged on the elastic supporting piece and is supported by the elastic supporting piece, one end of the connecting hose is connected with the spray head, and the other end of the connecting hose is connected with the inside of the air inlet plate.
4. The rotary drilling rig pore-forming construction method adopting the chemical polymer slurry retaining wall is characterized in that the elastic support comprises a first support spring, a second support spring, a first connecting piece and a second connecting piece, the first support spring and the second support spring are vertically fixed on the air inlet plate, the first connecting piece is fixed at the upper end of the first support spring and fixedly connected with the spray head, and the second connecting piece is fixed at the upper end of the second support spring and fixedly connected with the spray head.
5. The rotary drilling rig hole forming construction method adopting the chemical polymer mud retaining wall is characterized in that the first connecting piece and the second connecting piece are arranged in a block shape, a rod shape or a sheet shape.
6. The rotary drilling rig hole forming construction method adopting the chemical polymer slurry retaining wall according to claim 3, wherein the plurality of injection units are arranged in a rectangular array.
7. The rotary drilling rig pore-forming construction method adopting the chemical polymer slurry retaining wall is characterized in that the supporting column and the guide shell are both of hollow structures, the supporting column, the guide shell and the air inlet plate are communicated, and a plurality of vent holes are formed in the inner wall of the guide shell.
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| CN202010419262.7A CN111594175B (en) | 2020-05-18 | 2020-05-18 | Hole forming construction method of rotary drilling rig adopting chemical polymer slurry retaining wall |
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| CN202010419262.7A CN111594175B (en) | 2020-05-18 | 2020-05-18 | Hole forming construction method of rotary drilling rig adopting chemical polymer slurry retaining wall |
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| CN105133582A (en) * | 2015-09-16 | 2015-12-09 | 河北建设勘察研究院有限公司 | Rotary excavating and drilling method for polymer and bentonite mixed mud |
| CN107938656A (en) * | 2017-10-20 | 2018-04-20 | 广州中煤江南基础工程公司 | Complexity rebuilds base pit engineering pile base construction method |
| CN110029660A (en) * | 2019-02-15 | 2019-07-19 | 中科兴创（北京）科技有限公司 | The construction technology of polymer mud retaining wall is used in a kind of rotary drilling rig work progress |
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