CN115387416B - Construction method for foundation pit excavation by adopting scouring excavation equipment - Google Patents
Construction method for foundation pit excavation by adopting scouring excavation equipment Download PDFInfo
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- CN115387416B CN115387416B CN202211166707.0A CN202211166707A CN115387416B CN 115387416 B CN115387416 B CN 115387416B CN 202211166707 A CN202211166707 A CN 202211166707A CN 115387416 B CN115387416 B CN 115387416B
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- pressure
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- cylinder
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
Abstract
The invention discloses a construction method for foundation pit excavation by adopting a flushing excavation equipment, which comprises the excavation equipment for excavation, wherein the excavation equipment comprises a rotary flushing head, a water injection hole for supplying water is arranged on the rotary flushing head, the water injection hole is connected with a high-pressure water inlet pipe and supplies water for the rotary flushing head, and rotary power is provided for the rotary flushing head by high-pressure high-speed water flow; a plurality of evenly distributed spray heads are arranged below the rotary flushing head, and a mud discharging pipe for mud water backflow is arranged at the top of the rotary flushing head; the exploring device is connected with a force limiting device for limiting the exploring force.
Description
Technical Field
The invention relates to the field of municipal engineering, in particular to a construction method for foundation pit excavation by adopting flushing excavation equipment.
Background
At present, aiming at the detection and excavation construction of underground pipelines under the condition of undefined conditions, the detection and excavation of foundation pits is generally performed manually, the efficiency is lower, the support cannot be effectively performed in the process, operators are required to operate in the foundation pits for a long time, the safety risk is high, and if the underground pipelines are excavated mechanically, the underground pipelines are easily damaged, and the conditions of communication interruption, water and power interruption, even gas leakage and the like are caused.
Disclosure of Invention
The invention aims to provide a construction method for foundation pit excavation by adopting flushing excavation equipment, which can more efficiently excavate an underground pipeline under the condition of not damaging the underground pipeline, improves the efficiency compared with manual excavation, avoids workers from being in a foundation pit for a long time, and reduces the safety risk.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the flushing and exploring equipment comprises exploring equipment for excavating, wherein the exploring equipment comprises a rotary flushing head, a water injection hole for supplying water is arranged on the rotary flushing head, the water injection hole is connected with a high-pressure water inlet pipe and supplies water for the rotary flushing head, and rotary power is provided for the rotary flushing head through high-pressure high-speed water flow; a plurality of evenly distributed spray heads are arranged below the rotary flushing head, and a mud discharging pipe for mud water backflow is arranged at the top of the rotary flushing head; the exploring device is connected with a force limiting device for limiting the exploring force.
The spray heads are arranged in an inclined mode.
The mud discharging pipe is a hollow metal pipe, the tail end of the mud discharging pipe is connected with the mud pump through a mud discharging hose, and mud water is pumped and discharged through the mud discharging pipe; the mud pipe is provided with a piston, the piston adopts a thin-wall cylinder structure, and the outer side of the piston is provided with an annular groove.
The force limiting device comprises a cylinder, an air adding hole, a pressure relief valve, a first torsion rotating member and a second torsion rotating member; the cylinder cavity, upper and lower part all have the apron, and the apron middle part is equipped with the round hole, and the round hole internal diameter on the apron is greater than the external diameter of mud pipe to inlay ring seal in the round hole inboard, lower part apron is used for restricting the piston, avoids restricting the piston to break away from the cylinder, and upper portion apron sets up the gas filling hole, and the gas filling hole is connected with the air compressor machine through high-pressure air pipe for aerify the pressurization for the cylinder, the relief valve is used for controlling the pressure in the cylinder, and the pressure reaches the automatic exhaust pressure release when certain numerical value, and this numerical value is adjusted through the relief valve.
The first torsion rotating member and the second torsion rotating member are mounted on the outer wall of the cylinder, are realized by adopting a torsion wrench principle, and can adjust the torsion.
When the device is particularly used, the first torsion rotating member and the second torsion rotating member are connected with a mechanical arm of a construction machine for driving the whole exploring equipment to move.
The construction machine employs an excavator with the bucket removed.
The construction method for foundation pit excavation by adopting scouring excavation equipment comprises the following steps:
step one: installing and checking the sealing condition between the sealing ring at the outer side of the piston and the cylinder of the force limiting device;
step two: penetrating the whole exploring equipment into the air cylinder from the lower part of the force limiting equipment, and fixedly installing an upper cover plate and a lower cover plate of the air cylinder;
step three: connecting the second torsion rotating member with a mechanical arm of the construction machine;
step four: connecting the water injection hole with a high-pressure water pipe, connecting a mud discharge pipe with a mud discharge pump through a mud discharge hose, and connecting the air filling hole with an air compressor through a high-pressure air pipe;
step five: setting a pressure relief valve, a first torsion rotating member and a maximum pressure value of a second torsion rotating member according to the condition of the pipeline to be excavated and in combination with the on-site geological condition;
step six: completing surface cleaning construction and hard obstacle cleaning work, and preparing a slurry storage tank;
step seven: injecting high-pressure water to enable the rotary flushing head to jet high-pressure water flow and rotate, synchronously inflating the air cylinder, controlling the mechanical arm to press down the flushing soil layer, opening the slurry pump to drain the slurry through the slurry discharging pipe, and storing the slurry in the slurry storage tank;
step eight: after the foundation pit is flushed to a certain depth, the mechanical arm is operated to lift the exploring equipment to shift, and then the flushing and mud discharging operation is continued.
In the seventh step, if the downward pressure of the mechanical arm is too high, the pressure release valve can exhaust passively, and the exploring equipment can retract to avoid damaging the cable to be explored; if the horizontal force is excessively applied, the first torsion rotary member and the second torsion rotary member may unload the force.
The invention has the following beneficial effects:
1. according to the flushing and exploring equipment, the exploring and excavating mode of flushing by high-pressure water flow can be adopted, the foundation pit can be explored and excavated, damage to an underground pipeline can be effectively prevented in the exploring and excavating process, the exploring and excavating efficiency is ensured, and meanwhile, the safety risk is reduced.
2. By adopting the matching mode between the air cylinder and the air filling hole, the corresponding pressure can be provided for the whole rotary flushing head, and then the downward pressure is provided. And the pressure can be controlled in a pneumatic mode, so that the safety is ensured.
3. By adopting the first torsion rotating member and the second torsion rotating member, the whole device can be connected with the mechanical arm, and the pressure control of the whole device can be realized through the mechanical arm.
4. The lower pressure of the whole exploring equipment can be conveniently controlled through the mechanical arm connecting structure.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a structural diagram of the exploratory device of the present invention.
Fig. 3 is a front view of the force limiting device of the present invention.
FIG. 4 is a schematic diagram of the force limiting apparatus of the present invention.
Fig. 5 is a schematic side view of the force limiting device of the present invention.
Fig. 6 is a schematic diagram of the invention during a concrete exploratory construction process.
In the figure: the device comprises a water injection hole 1, a rotary flushing head 2, a spray head 3, a mud pipe 4, a piston 5, a cylinder 6, an air filling hole 7, a pressure relief valve 8, a first torsion rotary member 9 and a second torsion rotary member 10.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
1-6, a flushing and exploring device comprises an exploring device for excavating, wherein the exploring device comprises a rotary flushing head 2, a water injection hole 1 for supplying water is arranged on the rotary flushing head 2, the water injection hole 1 is connected with a high-pressure water inlet pipe and supplies water for the rotary flushing head 2, and rotary power is provided for the rotary flushing head 2 through high-pressure high-speed water flow; a plurality of evenly distributed spray heads 3 are arranged below the rotary flushing head 2, and a mud discharge pipe 4 for mud water backflow is arranged at the top of the rotary flushing head 2; the exploring device is connected with a force limiting device for limiting the exploring force. According to the flushing and exploring equipment, the exploring and excavating mode of flushing by high-pressure water flow can be adopted, the foundation pit can be explored and excavated, damage to an underground pipeline can be effectively prevented in the exploring and excavating process, the exploring and excavating efficiency is ensured, and meanwhile, the safety risk is reduced.
Further, the spray head 3 adopts an inclined arrangement mode. Through adopting the slope arrangement mode, with the help of the direction effort of rivers, drive rotatory scour head 2 autogiration, and then provide rotation power, in addition, through adopting the slope mounting means, the effectual scour scope that has enlarged has improved work efficiency.
Further, the sludge discharge pipe 4 is a hollow metal pipe, the tail end of the sludge discharge pipe 4 is connected with a sludge pump through a sludge discharge hose, and sludge water is pumped and discharged through the sludge discharge pipe 4; the mud pipe 4 is provided with a piston 5, the piston 5 adopts a thin-wall cylinder structure, and the outer side of the piston 5 is provided with an annular groove. The sludge discharge process can be realized through the sludge discharge pipe 4. During operation, the slurry formed by flushing will enter the sludge discharge pipe 4 and be discharged by the slurry pump.
Further, the force limiting device comprises a cylinder 6, an air filling hole 7, a pressure release valve 8, a first torsion rotating member 9 and a second torsion rotating member 10; the cylinder 6 is hollow, upper and lower parts all have the apron, the apron middle part is equipped with the round hole, the round hole internal diameter on the apron is greater than the external diameter of mud pipe 4 to inlay ring seal in the round hole inboard, the lower part apron is used for restricting piston 5, avoids restricting piston 5 to break away from cylinder 6, upper portion apron sets up and adds gas pocket 7, it is connected with the air compressor machine through high-pressure air pipe to add gas pocket 7 for aerify the pressurization for cylinder 6, relief valve 8 is used for controlling the pressure in the cylinder 6, and the pressure reaches the automatic exhaust pressure release when certain numerical value, and this numerical value is adjusted through relief valve 8. The force limiting device can be used for controlling the exploratory force in the construction process. In the working process, high-pressure gas can be provided for the air cylinder 6 through the gas adding hole 7, the piston 5 is controlled to descend through the high-pressure gas, the mud discharging pipe 4 is controlled to descend through the piston 5, and then the rotary flushing head 2 is pressed down through the mud discharging pipe 4, and corresponding exploring and digging are realized by means of the rotary flushing head 2.
Further, the first torsion rotary member 9 and the second torsion rotary member 10 are mounted on the outer wall of the cylinder 6, and the first torsion rotary member 9 and the second torsion rotary member 10 are implemented by using a torsion wrench principle and can adjust the torsion. The first and second torsion rotary members 9 and 10 described above can be used to move the entire apparatus. And the safety of exploring and digging is ensured by controlling the downward pressure.
Further, in specific use, the first torsion rotating member 9 and the second torsion rotating member 10 are connected to a mechanical arm of a construction machine for driving the entire dredging apparatus to move. The lower pressure of the whole exploring equipment can be conveniently controlled through the mechanical arm connecting structure.
Further, the construction machine employs an excavator with the bucket removed.
Example 2:
the construction method for foundation pit excavation by adopting scouring excavation equipment comprises the following steps:
step one: installing and checking the sealing condition between the sealing ring at the outer side of the piston 5 and the cylinder 6 of the force limiting device;
step two: penetrating the whole exploring equipment into the air cylinder 6 from the lower part of the force limiting equipment, and fixedly installing an upper cover plate and a lower cover plate of the air cylinder 6;
step three: connecting the second torsion rotary member 10 to a mechanical arm of the construction machine;
step four: the water injection hole 1 is connected with a high-pressure water pipe, the mud discharging pipe 4 is connected with a mud discharging pump through a mud discharging hose, and the air adding hole 7 is connected with an air compressor through a high-pressure air pipe;
step five: setting the maximum pressure value of the pressure release valve 8, the first torsion rotating member 9 and the second torsion rotating member 10 according to the condition of the pipeline to be excavated and combined with the on-site geological condition;
step six: completing surface cleaning construction and hard obstacle cleaning work, and preparing a slurry storage tank;
step seven: injecting high-pressure water to enable the rotary flushing head 2 to jet high-pressure water flow and rotate, synchronously inflating the air cylinder 6, controlling the mechanical arm to press down the flushing soil layer, opening the slurry pump to drain the slurry through the slurry discharge pipe 4, and storing the slurry in the slurry storage tank;
step eight: after the foundation pit is flushed to a certain depth, the mechanical arm is operated to lift the exploring equipment to shift, and then the flushing and mud discharging operation is continued.
In the seventh step, if the downward pressure of the mechanical arm is too high, the pressure release valve 8 will exhaust passively, and the exploring device will retract to avoid damaging the cable to be explored; if the horizontal force is excessively applied, the first torsion rotary member 9 and the second torsion rotary member 10 may unload the force.
Claims (4)
1. The construction method for foundation pit excavation by adopting the scouring and excavation equipment comprises the excavation equipment for excavation, wherein the excavation equipment comprises a rotary scouring head (2), a water injection hole (1) for supplying water is arranged on the rotary scouring head (2), the water injection hole (1) is connected with a high-pressure water inlet pipe and supplies water for the rotary scouring head (2), and rotary power is provided for the rotary scouring head (2) by high-pressure high-speed water flow; a plurality of evenly distributed spray heads (3) are arranged below the rotary flushing head (2), and a mud discharge pipe (4) for mud water backflow is arranged at the top of the rotary flushing head (2);
the digging detection equipment is connected with force limiting equipment for limiting digging detection force;
the spray heads (3) are arranged in an inclined mode;
the mud discharging pipe (4) is a hollow metal pipe, the tail end of the mud discharging pipe (4) is connected with a mud pump through a mud discharging hose, and mud water is pumped and discharged through the mud discharging pipe (4); a piston (5) is arranged on the sludge discharge pipe (4), the piston (5) adopts a thin-wall cylinder structure, and an annular groove is arranged on the outer side of the piston (5);
the force limiting device comprises a cylinder (6), an air filling hole (7), a pressure release valve (8), a first torsion rotating member (9) and a second torsion rotating member (10); the cylinder (6) is hollow, the upper part and the lower part of the cylinder are both provided with cover plates, the middle part of the cover plates is provided with round holes, the inner diameter of the round holes in the cover plates is larger than the outer diameter of the mud discharging pipe (4), annular sealing rings are embedded in the inner sides of the round holes, the lower cover plates are used for limiting the piston (5) to prevent the piston (5) from separating from the cylinder (6), the upper cover plates are provided with air adding holes (7), the air adding holes (7) are connected with an air compressor through high-pressure air pipes and are used for inflating and pressurizing the cylinder (6), the pressure releasing valve (8) is used for controlling the pressure in the cylinder (6), and automatic air exhaust and pressure release are realized when the pressure reaches a certain value, and the value is regulated through the pressure releasing valve (8);
the first torsion rotating member (9) and the second torsion rotating member (10) are arranged on the outer wall of the air cylinder (6), and the first torsion rotating member (9) and the second torsion rotating member (10) are realized by adopting a torsion wrench principle and can adjust the torsion;
the construction method is characterized by comprising the following steps of:
step one: installing and checking the sealing condition between the sealing ring at the outer side of the piston (5) and the cylinder (6) of the force limiting device;
step two: penetrating the whole exploring equipment into the air cylinder (6) from the lower part of the force limiting equipment, and fixedly installing an upper cover plate and a lower cover plate of the air cylinder (6);
step three: connecting the second torque rotating member (10) to a mechanical arm of the construction machine;
step four: the water injection hole (1) is connected with a high-pressure water pipe, the sludge discharge pipe (4) is connected with a sludge discharge pump through a sludge discharge hose, and the air adding hole (7) is connected with an air compressor through a high-pressure air pipe;
step five: according to the condition of the pipeline to be excavated, setting the maximum pressure value of the pressure relief valve (8), the first torsion rotating member (9) and the second torsion rotating member (10) by combining the on-site geological condition;
step six: completing surface cleaning construction and hard obstacle cleaning work, and preparing a slurry storage tank;
step seven: injecting high-pressure water to enable the rotary flushing head (2) to jet high-pressure water flow and rotate, synchronously inflating the air cylinder (6), controlling the mechanical arm to press down to flush soil layers, starting the slurry pump to drain the slurry through the slurry discharging pipe (4), and storing the slurry in the slurry storage tank;
step eight: after the foundation pit is flushed to a certain depth, the mechanical arm is operated to lift the exploring equipment to shift, and then the flushing and mud discharging operation is continued.
2. The construction method for foundation pit excavation by adopting flushing excavation equipment according to claim 1, wherein the construction method comprises the following steps: when the device is particularly used, the first torsion rotating member (9) and the second torsion rotating member (10) are connected with a mechanical arm of a construction machine for driving the whole exploring equipment to move.
3. The construction method for foundation pit excavation by adopting the flushing excavation equipment according to claim 2, wherein the construction method comprises the following steps: the construction machine employs an excavator with the bucket removed.
4. The construction method for foundation pit excavation by using the flushing excavation equipment according to claim 1, wherein in the seventh step, if the downward pressure of the mechanical arm is too high, the pressure release valve (8) is passively exhausted, and the excavation equipment is retracted to avoid damaging the cable to be excavated; if the horizontal force is too great, the first torsion rotating member (9) and the second torsion rotating member (10) will unload the force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211166707.0A CN115387416B (en) | 2021-07-30 | 2021-07-30 | Construction method for foundation pit excavation by adopting scouring excavation equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211166707.0A CN115387416B (en) | 2021-07-30 | 2021-07-30 | Construction method for foundation pit excavation by adopting scouring excavation equipment |
| CN202110874809.7A CN113494108B (en) | 2021-07-30 | 2021-07-30 | Scouring exploration and excavation equipment |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110874809.7A Division CN113494108B (en) | 2021-07-30 | 2021-07-30 | Scouring exploration and excavation equipment |
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| CN115387416A CN115387416A (en) | 2022-11-25 |
| CN115387416B true CN115387416B (en) | 2023-08-15 |
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| CN202211166707.0A Active CN115387416B (en) | 2021-07-30 | 2021-07-30 | Construction method for foundation pit excavation by adopting scouring excavation equipment |
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| JPH03293433A (en) * | 1990-04-09 | 1991-12-25 | Yutani Heavy Ind Ltd | Control on operator of oil-pressure type operating machine |
| JPH06220885A (en) * | 1993-01-20 | 1994-08-09 | Yutani Heavy Ind Ltd | Hydraulic shovel for sidewise excavation |
| JPH10219729A (en) * | 1997-02-03 | 1998-08-18 | Hitachi Constr Mach Co Ltd | Front controller for construction equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115387416A (en) | 2022-11-25 |
| CN113494108A (en) | 2021-10-12 |
| CN113494108B (en) | 2022-11-08 |
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