CN-122013751-A - Deep pollution in-situ sucking, injecting and stirring integrated curing equipment and construction method thereof

CN122013751ACN 122013751 ACN122013751 ACN 122013751ACN-122013751-A

Abstract

The invention discloses deep pollution in-situ sucking, injecting and stirring integrated curing equipment and a construction method thereof, which are characterized by comprising a porous pipe drill rod and a sucking, injecting and stirring integrated drill bit; the porous pipe drill rod is axially provided with a water injection hole, a grouting hole, a water pouring hole, a mud pouring hole and a high-pressure air hole. The invention has the advantages that the deep polluted soil (such as the soil below 10 m) can be directly solidified without ectopic excavation, and the problems of large excavation depth, high cost and high safety risk are solved. The secondary pollution can be avoided, the negative pressure system formed by the inverted mud suction nozzle and the inverted mud hole can suck the polluted mud generated by drilling and stirring in real time and store the polluted mud in an external device, so that the secondary pollution caused by the overflow of the mud to the ground is effectively prevented. The device has good economy, compared with a simple stirring process, the device reduces disturbance to non-polluted soil and dosage of curing agents through high-pressure cutting and accurate grouting, and meanwhile, the construction efficiency is improved through integrated operation, and the comprehensive cost is reduced.

Inventors

WANG WEIDONG
DONG FAN
ZHANG LINA
LAN WEI
YAO LIGUO
CHANG LINYUE
LI QING
SUN WEI
XU YUAN
ZHANG ZHONGXIAN
LOU JUNHUI

Assignees

上海申元岩土工程有限公司
华东建筑设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. The deep pollution in-situ sucking, injecting and stirring integrated curing equipment is characterized by comprising a porous pipe drill rod (1) and a sucking, injecting and stirring integrated drill bit (2); The porous pipe drill rod (1) is axially provided with a water injection hole (3), a grouting hole (4), a water pouring hole (5), a mud pouring hole (6) and a high-pressure air hole (7), and all the pore channels are independently configured and used for respectively conveying water, curing agents, water absorption, mud discharge and high-pressure air; The suction-injection-stirring integrated drill bit (2) is connected to the tail end of the perforated pipe drill rod (1) and is integrated with a cutting head (8), a cutting nozzle (9), a high-pressure water nozzle (10), a high-pressure slurry nozzle (11), a reverse mud discharge suction nozzle (12) and a retractable stirring blade (13); The cutting nozzle (9) and the high-pressure water nozzle (10) are communicated with the water injection hole (3), the high-pressure slurry nozzle (11) is communicated with the grouting hole (4), the inverted mud suction nozzle (12) is communicated with the inverted mud hole (6), and the expandable stirring blade (13) is in driving connection with the drill rod through the transmission mechanism (14) so as to realize expansion or contraction in a drilled hole.
2. The deep pollution in-situ suction, injection and stirring integrated curing device according to claim 1, wherein the porous pipe drill rod (1) is of a built-in multi-parallel pipe structure, and the water injection hole (3), the grouting hole (4), the water pouring hole (5), the mud pouring hole (6) and the high-pressure air hole (7) are respectively arranged in different parallel pipes.
3. The deep pollution in-situ sucking, injecting and stirring integrated curing device according to claim 1, wherein the cutting nozzle (9) is arranged at the front end of the cutting head (8) and is used for spraying high-pressure water to cool and assist in cutting soil, the high-pressure water nozzle (10) and the high-pressure slurry nozzle (11) are respectively arranged on the side wall of the drill bit and are obliquely arranged to form rotary cutting flow, and the reverse mud suction nozzle (12) is arranged on the side wall of the drill bit and is connected with the reverse mud hole (6) and is used for sucking polluted mud.
4. The deep pollution in-situ suction, injection and stirring integrated curing equipment according to claim 1, wherein the expandable and contractible stirring blade (13) is connected with a driving device in the drill rod through a hydraulic transmission mechanism (14), and the stirring blade is in a wing-shaped structure in an expanded state and is used for stirring and mixing in a drill hole.
5. A deep pollution in-situ sucking, injecting and stirring integrated curing construction method adopting the curing equipment as set forth in any one of claims 1-4, comprising the following steps: (a) Installing a sucking, injecting and stirring integrated drill bit (2) and a perforated pipe drill rod (1), rotating the drill rod, spraying high-pressure water through a cutting nozzle (9), cooling a cutting head (8) and cutting soil body to form a drill hole until the drill hole reaches the top of a deep polluted soil layer; (b) Opening a reverse mud suction nozzle (12) and a reverse water suction hole (5) to form negative pressure, continuously drilling down to the bottom of a deep polluted soil layer, and sucking polluted mud to an external storage device through the reverse mud suction nozzle (12) and the reverse mud suction hole (6); (c) Stopping drilling and water spraying of the cutting nozzle (9), lifting the drill rod, simultaneously starting the high-pressure water nozzle (10) and the high-pressure air hole (7), rotating the drill rod to cut deep polluted soil at high pressure, and continuously sucking and discharging formed polluted slurry through the reverse mud discharging system; (d) When the drill rod is lifted to the top of the deep polluted soil layer, stopping high-pressure water, high-pressure air and mud dumping operation, sinking the drill rod to the bottom of the polluted soil layer, expanding the expandable and contractible stirring blades (13), and injecting a curing agent through the grouting holes (4); (e) Rotating and lifting the drill rod to enable the stirring blade to fully mix the curing agent with the polluted soil, and simultaneously enabling the mud dumping system to continuously work to prevent mud in the hole from overflowing the ground; (f) When stirring is lifted to a preset height above the top of the polluted soil layer, grouting and stirring are stopped, a sinker drill rod is arranged below the top of the polluted soil layer, the stirring blades are contracted, then the drill rod is lifted and removed, and the current hole site curing operation is completed.
6. The construction method according to claim 5, wherein in the step (b), the negative pressure of the reverse suction nozzle (12) is formed by the reverse suction water passing through the internal reduced section of the reverse suction hole, and the slurry is sucked to the external storage device after being mixed with the slurry in the reverse suction hole, and the negative pressure value and the slurry discharge flow rate can be controlled to adapt to different soil conditions by adjusting the reverse suction flow rate and the flow rate.
7. The construction method according to claim 5, wherein in the step (d), the curing agent is cement paste or chemical curing agent, injection pressure is adjusted by a matched high-pressure grouting pump, and grouting amount is matched with lifting speed to ensure uniform mixing.
8. The construction method according to claim 5, wherein in the step (e), the rotational speed of the drill rod is increased by 0.5-2.0 m/min, and the stirring range after the stirring blade is unfolded is greater than 6.0-10.0 times of the diameter of the drilled hole.
9. The construction method according to claim 5, wherein in the step (f), the preset height is 2.0m, and the drill pipe is lifted after the stirring blade is completely retracted after the drill pipe is submerged to the top of the contaminated soil layer.
10. The construction method according to any one of claims 5-9, wherein the water injection, grouting, mud discharge and stirring parameters are controlled by a real-time monitoring system during the whole construction process, so as to realize in-situ accurate solidification and avoid secondary pollution.

Description

Deep pollution in-situ sucking, injecting and stirring integrated curing equipment and construction method thereof Technical Field The invention relates to the technical field of environmental geotechnical engineering, in particular to deep pollution in-situ sucking, injecting and stirring integrated curing equipment and a construction method thereof. Background With the progress of industrialization and urbanization, the soil pollution problem is increasingly prominent, and especially the treatment difficulty of deep polluted soil (such as chemical industry and mining area pollution) is high. The traditional ectopic treatment needs large-scale excavation, has large depth and high cost, and is easy to cause pollutant diffusion. The existing in-situ solidification technology has the problems of uneven mixing and poor solidification effect like a simple injection technology, and the simple stirring technology has the defects of disturbing non-polluted soil and large dosage of medicament. In addition, the polluted slurry generated in the drilling process is easy to overflow the ground, so that secondary pollution is caused. Therefore, an apparatus and a method for realizing the integrated operations of drilling, mud discharging, grouting and stirring are urgently needed, and the solidification of the deep polluted soil with precision, high efficiency and environmental protection is realized. Disclosure of Invention 1. Technical problem to be solved Aiming at the defects of the prior art, the invention provides deep pollution in-situ sucking, injecting and stirring integrated curing equipment and a construction method thereof, which have the advantages of in-situ accurate curing, secondary pollution avoidance, mixing effect improvement, good economy and the like, and solve the problems in the background. (II) technical scheme In order to achieve the aim, the invention provides the technical scheme that the deep pollution in-situ sucking, injecting and stirring integrated curing equipment comprises a porous pipe drill rod and a sucking, injecting and stirring integrated drill bit; The porous pipe drill rod is axially provided with a water injection hole, a grouting hole, a water pouring hole, a mud pouring hole and a high-pressure air hole, and the pore canals are independently configured and used for respectively conveying water, curing agents, water absorption, mud discharging and high-pressure air; the sucking, injecting and stirring integrated drill bit is connected to the tail end of the perforated pipe drill rod and is integrated with a cutting head, a cutting nozzle, a high-pressure water nozzle, a high-pressure slurry nozzle, a reverse mud discharging suction nozzle and a telescopic stirring blade; the cutting nozzle and the high-pressure water nozzle are communicated with the water injection hole, the high-pressure slurry nozzle is communicated with the grouting hole, the mud pouring suction nozzle is communicated with the mud pouring hole, and the expandable stirring blade is in driving connection with the drill rod through the transmission mechanism so as to realize expansion or contraction in a drilled hole. Preferably, the porous pipe drill rod is of a structure with a plurality of parallel pipes, and the water injection hole, the grouting hole, the water pouring hole, the mud pouring hole and the high-pressure air hole are respectively arranged in different parallel pipes. Preferably, the cutting nozzle is arranged at the front end of the cutting head and used for spraying high-pressure water to cool and assist in cutting soil, the high-pressure water nozzle and the high-pressure slurry nozzle are respectively arranged on the side wall of the drill bit and are obliquely arranged to form rotary cutting flow, and the inverted mud suction nozzle is arranged on the side wall of the drill bit and connected with the inverted mud hole and used for sucking polluted mud. Preferably, the expandable stirring blade is connected with the driving device inside the drill rod through a hydraulic transmission mechanism, and the stirring blade is in a wing-shaped structure in an expanded state and is used for stirring and mixing in a drill hole. The device has the core design that in-situ accurate solidification is realized, through the integrated design of the porous pipe drill rod and the drill bit, deep polluted soil (such as less than 10 m) can be directly solidified, ex-situ excavation is not needed, and the problems of large excavation depth, high cost and high safety risk are solved. The secondary pollution is avoided, the negative pressure system formed by the reverse mud discharging suction nozzle and the reverse mud discharging hole can suck the polluted mud generated by drilling and stirring in real time and store the polluted mud in an external device, and the secondary pollution caused by the overflow of the mud to the ground is effectively prevented. The mixing effect is improved, namely, the combinati