CN110439048B - Hydraulic punching cutter suction equipment and method for inner support foundation pit engineering - Google Patents
Hydraulic punching cutter suction equipment and method for inner support foundation pit engineering Download PDFInfo
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- CN110439048B CN110439048B CN201910811579.2A CN201910811579A CN110439048B CN 110439048 B CN110439048 B CN 110439048B CN 201910811579 A CN201910811579 A CN 201910811579A CN 110439048 B CN110439048 B CN 110439048B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004080 punching Methods 0.000 title claims abstract description 16
- 239000002689 soil Substances 0.000 claims abstract description 44
- 238000009412 basement excavation Methods 0.000 claims abstract description 34
- 238000011010 flushing procedure Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 239000002344 surface layer Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 238000005527 soil sampling Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Abstract
The invention provides hydraulic punching cutter suction equipment and a hydraulic punching cutter suction method for an internal support foundation pit project, wherein the hydraulic punching cutter suction equipment comprises a main rod, a power device, a double-shaft soil cutter, a mud suction pipe nested in the main rod, and high-pressure water guns which are arranged on two sides of the main rod, are connected into the main rod from the upper part of the power device and extend to be inserted into a fixing plate; the method comprises the following steps: excavating a surface soil body; construction of a first concrete inner support and installation of an I-shaped steel rail of an electric hoist; laying a pipeline; arranging workload; and (5) hydraulic flushing construction. The beneficial effects of the invention are as follows: the invention has simple structure, convenient operation, convenient maintenance and low cost, and aims at carrying out soft soil excavation in foundation pit engineering with internal support, compared with the traditional excavator, the efficiency is obviously improved, the construction period of earthwork is greatly shortened, the influence caused by dust emission is reduced, and the problems of residue soil transportation and the like are solved.
Description
Technical Field
The invention relates to the technical field of earth excavation equipment, in particular to hydraulic flushing cutter suction equipment for foundation pit engineering with smaller equipment moving space stored in an internal support and a use method thereof.
Background
Nowadays, the ground space is nearly saturated, underground space engineering starts to develop rapidly, foundation pit support is needed in most engineering, especially soft soil deep foundation pit is needed to be provided with a support structure, however, the movable space of the foundation pit after internal support is arranged is narrow, normal work of a large excavator is greatly limited, the earthwork excavation rate is slow, meanwhile, auxiliary equipment conveyor is needed for conveying the earthwork to the outside of the pit, the construction period is prolonged, potential safety hazards are generated, the muck conveying cost is high and time limit is also carried out, in addition, dust emission is generated to influence the environment, and a lot of influence is brought to the engineering.
In the field of suction equipment, a cutter suction type suction dredge exists, and the main functions are to clean silt and silt buried in the water bottom, so that the cutter suction type suction dredge is not suitable for earth excavation on land. Chinese patent No. 201820676270.8 discloses a cutter suction dredger, which is driven by a power device to descend by two soil sampling devices, and a ring plate and a wing plate are additionally arranged on a drill bit, so that the soil sampling capability is improved, the soil sampling efficiency of a large open caisson in a round gravel soil layer and a clay soil layer is excellent, and the cutter suction dredger is widely applied to open caisson suction sinking engineering. The equipment can only wring and absorb soil with high water content or low strength, and is usually arranged with the help of a transport ship, and is not suitable for excavating soil in land foundation pits.
Chinese patent CN207998850 discloses a "hydraulic flushing system for earthwork of foundation pit in the river and the sea", which comprises a hydraulic flushing mechanism and a slurry transporting mechanism. The hydraulic flushing system reduces temporary engineering construction, and has the advantages of short construction period, economy and environmental protection. However, the hydraulic flushing and the slurry transportation are separately carried out in the patent, and the system is not integrally considered, and in addition, the flushing efficiency is greatly reduced when the property of the foundation pit soil body is good and the area of the foundation pit is large.
How to solve the technical problems is the subject of the present invention.
Disclosure of Invention
The invention aims to provide hydraulic punching cutter suction equipment and method for a deep foundation pit with a narrow construction space, in particular to a deep foundation pit with an inner support.
The invention is realized by the following measures: the utility model provides a hydraulic flushing cutter suction equipment for internal support foundation ditch engineering, includes the mobile jib, connect in power device on mobile jib and the fixed beam, by power device driven biax hank native device, biax hank native device runs through and connects in fixed beam and the fixed plate, biax hank native device's diaxon symmetry sets up, every biax hank native device all includes hydraulic motor, hydraulic motor bottom axial connection has the power output shaft by its driven, power output shaft has the reamer head, still includes the nest suction pipe in the mobile jib, and set up in the mobile jib both sides, follow power device top inserts and extends and inserts the high-pressure squirt of fixed plate.
As a further optimization scheme of the hydraulic punching cutter suction equipment for the inner support foundation pit engineering, each shaft in the double-shaft soil cutter comprises the hydraulic motor, and the lower end of the hydraulic motor is connected with the fixed beam through a screw; the bottom end of the hydraulic motor is connected with a power output shaft driven by the hydraulic motor, and the power output shaft extends vertically downwards; the reamer head is fixed at the lower end of the power output shaft and is driven to rotate by the power output shaft.
As a further optimization scheme of the hydraulic punching cutter suction equipment for the inner support foundation pit engineering, the lower part of the reamer head is provided with a double-screw drill bit, the middle part of the reamer head is provided with a plurality of reamer teeth which are spirally distributed, and grooves are arranged between the reamer teeth along the bus direction of the reamer head; the upper part is provided with wing plates, the wing plates are four mutually perpendicular steel plates with trapezoidal cross sections and narrow upper part and wide lower part, and the wing plates are welded and fixed together by an external fixing ring.
As a further optimization scheme of the hydraulic flushing cutter suction equipment for the internal support foundation pit engineering, the main rod is a hollow thin-wall steel pipe, threads are arranged on the inner wall of the upper end of the main rod, a threaded sleeve can be used for increasing the length of the main rod, the threaded sleeve is formed by embedding the mud suction pipe into the main rod, the outlet end of the upper section of the mud suction pipe is connected with a mud suction pump, the lower end of the mud suction pipe penetrates through a fixed plate for a certain length and does not reach the horizontal position of the reamer head, and the tail of the mud suction pipe is connected with a mud suction nozzle.
As a further optimization scheme of the hydraulic flushing cutter suction equipment for the internal support foundation pit engineering, the mud suction nozzle is connected to the inlet at the bottom end of the mud suction pipe, the inlet at the lower end of the mud suction pipe is in a truncated cone shape, and a grid baffle is arranged in the mud suction pipe; the grid baffle can prevent broken stone from entering the mud suction pipe.
As a further optimization scheme of the hydraulic flushing cutter suction equipment for the inner support foundation pit engineering, the high-pressure water gun is arranged on two sides of the main rod, the inlet end of the upper section is connected with the high-pressure water pump, the middle part of the high-pressure water gun is fixed with the power device through the lock catch, and the lower end of the high-pressure water gun penetrates through the fixing plate to be clamped in the U-shaped groove and is higher than the horizontal position of the suction nozzle; the lower end of the water pressing gun penetrates through the fixing plate to be clamped in the U-shaped groove for a certain length and is higher than the horizontal position of the mud suction nozzle.
As a further optimization scheme of the hydraulic punching cutter suction equipment for the inner support foundation pit engineering, the double-shaft soil cutter sequentially penetrates through the fixing beam and the fixing plate to be connected with the main rod, and the fixing beam and the fixing plate are welded on the main rod.
Further, the hydraulic flushing cutter suction equipment further comprises balancing weights, wherein the balancing weights are symmetrically clamped on two sides of the main rod, and the fixing plates are used as bottom surfaces to be stacked upwards in sequence.
In order to better achieve the purpose of the invention, the invention also provides a use method of the hydraulic punching cutter suction equipment for the inner support foundation pit engineering, which comprises the following steps:
1) Removing sundries such as sundries and filling soil on the surface layer of the foundation pit through mechanical excavation, and digging the foundation pit to the bottom surface of the first inner support;
2) Pouring a first concrete internal support, reserving bolts, continuously excavating downwards for 2m, and installing an I-shaped steel rail and an electric hoist;
3) The electric hoist in the step 2) is used for lifting and arranging hydraulic flushing cutter suction equipment for entering;
4) The excavation construction adopts an excavation sequence of firstly center and then periphery, downward excavation is carried out to the bottom surface of the next support by using hydraulic excavation, the internal support of the next concrete is poured, bolts are reserved, downward excavation is continued for 2m, and an electric hoist and hydraulic excavation cutter suction equipment are installed; and so on, stopping using the hydraulic flushing until the flushing is carried out to a position which is 0.3m away from the substrate, and completing the flushing by manual bottoming.
The excavation construction in the step 4) adopts an excavation mode of firstly centering and then surrounding, and follows the excavation principle of layering, uniformity and symmetry.
The beneficial effects of the invention are as follows:
(1) The invention has simple structure, convenient operation, convenient maintenance and low cost, and aims at carrying out soft soil excavation in foundation pit engineering with internal support, compared with the traditional excavator, the efficiency is obviously improved, the construction period of earthwork is greatly shortened, the influence caused by dust emission is reduced, and the problems of residue soil transportation and the like are solved.
(2) The double-shaft soil twisting device is adopted for synchronous operation, the reamer head is divided into four functional areas, and the lower part of the double-shaft soil twisting device is provided with a double-screw drill bit which can drill and rub a hard soil layer; the reamer teeth in the middle are protruded and spirally and upwards distributed around the surface of the cutter head, so that soil can be effectively minced, the soil digging area can be enlarged, and the soil can be twisted to the upper part of the reamer head; grooves are engraved among the reamer teeth along the bus direction, so that soil or filler can be prevented from blocking the reamer teeth; the upper part is the pterygoid lamina, and the pterygoid lamina cross-section is trapezoidal, and the soil mixed water that will lay up continues stirring to become mud, and the design of trapezoidal cross-section not only increases the anti deformability of pterygoid lamina, can also constantly push away the earth that stirs to the upper strata for the vertical component of earth simultaneously when stirring, makes it be close to the suction pipe, and the pterygoid lamina of large tracts of land can increase the area of contact with soil moreover and improve the cutter soil efficiency, finally cooperates equipment to realize the cutter suction function of punching.
(3) According to the invention, the suction pipe and the high-pressure water gun are integrated, so that the suction cutter suction can be performed at the same time, the construction complexity is greatly simplified, and the suction cutter suction method and the suction cutter method can be combined to improve the working efficiency and the application range.
(4) The invention adopts the hydraulic motor, has low rotating speed, can be directly connected with the working mechanism, does not need a speed reducing device, greatly simplifies the transmission mechanism and has larger output torque of the low-speed hydraulic motor.
(5) The threaded sleeve is adopted to increase the length of the main rod of the equipment, so that the operation is simple and the applicability is high.
(6) The invention adopts the replaceable suction nozzle, and the grid baffle is arranged in the suction nozzle, so that large broken stones or hard soil blocks can be prevented from entering the suction pipe, and the normal operation of the suction dredge is ensured.
(7) The equipment adopted in the invention is portable, can work at any position of the foundation pit, and can control the water immersion area in the construction process, thereby reducing the increase of the water content of soil in the pit as much as possible.
(8) The noise and Yang Chen in the construction process are smaller, and the earthwork transportation is not needed, so that the energy is saved and the environment is protected.
(9) The method used in the invention can obviously improve the mechanization degree of the earth excavation of the foundation pit of the soft soil field, has high excavation efficiency, can continuously work for 24 hours, and can obviously shorten the earth excavation period; in addition, the engineering cost is greatly reduced compared with the conventional method.
Drawings
FIG. 1 is a front view of a structure of an embodiment of the present invention;
FIG. 2 is a left side view of the structure of an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is an enlarged partial schematic view at B in FIG. 1;
Fig. 5 is a front view at B in fig. 1;
FIG. 6 is a view in the direction C of FIG. 5;
FIG. 7 is a D-view of FIG. 5;
FIG. 8 is a schematic view of a suction nozzle according to an embodiment of the present invention;
FIG. 9 is a front view of a threaded sleeve according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of an assembly structure of a hydraulic punching device and a support in a foundation pit according to an embodiment of the present invention;
Wherein, the reference numerals are as follows: 1. a main rod; 2. a power device; 3. a hydraulic motor; 4. a power output shaft; 5. a fixing plate; 6. a suction pipe; 6-1, a mud suction nozzle; 7. high-pressure water gun; 8. a reamer head; 8-1, double helix drill bit; 8-2, reamer teeth; 8-3, wing plates; 8-4, grooves; 8-5, an outer fixing ring; 9. a fixed beam; 10. locking; 11. a U-shaped groove; 12. a threaded sleeve; 13. an electric hoist; 14. an I-steel track; 15. and (5) an inner support.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.
Referring to fig. 1 to 10, the present invention is: the utility model provides a hydraulic flushing cutter suction equipment for internal support foundation ditch engineering, including mobile jib 1, connect the power device 2 on mobile jib 1 and fixed beam 9, by the biax hank native device of power device 2 driven, biax hank native device runs through and connects in fixed beam 9 and fixed plate 5, biax hank native device's diaxon symmetry sets up, every biax hank native device all includes hydraulic motor 3, hydraulic motor bottom axial is connected with by its driven power output shaft 4, power output shaft 4 is connected with reamer head 8, still include the suction tube 6 of nestification in mobile jib 1, and set up in mobile jib 1 both sides, access and extend the high-pressure squirt 7 of inserting fixed plate 5 from power device 2 top.
Specifically, each shaft in the double-shaft soil twisting device comprises a hydraulic motor 3, and the lower end of the hydraulic motor 3 is connected with a fixed beam 9 through a screw; the bottom end of the hydraulic motor 3 is connected with a power output shaft 4 driven by the hydraulic motor, and the power output shaft 4 extends vertically downwards; the reamer head 8 is fixed at the lower end of the power output shaft 4, and is driven to rotate by the power output shaft 4.
Specifically, the lower part of the reamer head 8 is provided with a double-screw drill bit 8-1, the middle part of the double-screw drill bit is provided with a plurality of reamer teeth 8-2, the plurality of reamer teeth 8-2 are spirally distributed, and grooves 8-4 are arranged among the reamer teeth 8-2 along the bus direction of the reamer head 8; the upper part is provided with wing plates 8-3, the wing plates 8-3 are formed by four mutually perpendicular steel plates with trapezoidal cross sections and narrow upper part and wide lower part, and the wing plates 8-3 are welded and fixed together by an outer fixing ring 8-5;
The maximum diameter of the reamer head 8 is 50cm, the reamer head 8 is divided into a lower part, a middle part and an upper part, and the lower part is provided with a double-screw drill bit 8-1 with the height of 5cm; the middle part is provided with cutter teeth 8-2, the cutter teeth are spirally distributed in a way that every 45 degrees is provided with a group of cutter teeth 8-2, each group of cutter teeth 8-2 is provided with grooves 8-4 with the width of 2cm and the depth of 0.5cm along the bus direction of the cutter head 8; the upper part is provided with a wing plate 8-3, the wing plate 8-3 is four steel plates with the cross section perpendicular to each other and the trapezoid shape, the upper width is 1.5cm, and the lower width is 5 cm.
The working principle of the reamer head 8: the lower double-screw drill bit 8-1 can easily drill into a hard soil layer; the cutter teeth 8-2 spirally rising in the middle part can enlarge the soil digging area and simultaneously primarily grind and push the soil to the upper part of the cutter head 8; the upper wing plate 8-3 continuously stirs the ground mixed water which is twisted into mud, the arrangement of the trapezoid cross section not only increases the deformation resistance of the wing plate 8-3, but also can continuously push the stirred mud upwards by the vertical component force of the mud when stirring, so that the stirred mud is close to the mud suction pipe 6, and finally the cutter suction function is realized by matching with equipment; the grooves 8-4 effectively prevent the reamer, 8-2 from being blocked by the filler.
Specifically, the main rod 1 is a hollow thin-wall steel pipe, the inner wall of the upper end is provided with threads, the length of the main rod 1 can be increased by using a threaded sleeve 12, the threaded sleeve 12 is a mud suction pipe 6 which is nested in the main rod 1, the outlet end of the upper section of the mud suction pipe 6 is connected with a mud suction pump, namely, the lower end passes through a fixed plate 5 for a certain length but does not reach the horizontal position of a reamer head 8, the lower end passes through the fixed plate 5 and is lower than the horizontal position of the reamer head 8, and the tail part of the threaded sleeve is connected with a mud suction nozzle 6-1; the main rod 1 is a hollow thin-wall steel pipe with the outer diameter of 22cm and the inner diameter of 18.5cm, the diameter of the mud suction pipe 6 is 18cm, the outlet end at the uppermost end of the mud suction pipe 6 is nested in the main rod 1 and is connected with a mud suction pump, the lower end of the mud suction pipe passes through a fixed plate 5 for a certain length but does not reach the horizontal position of a reamer head 8, the tail part of the mud suction pipe is connected with a mud suction nozzle 6-1, the mud suction pump is selected from NL125-20.0, the flow rate is 200m 3/h, the lifting length is 20m, and the matched power is 22kw.
Specifically, the suction nozzle 6-1 is connected to the bottom inlet of the suction pipe 6, the lower inlet is cone-shaped, and a grid baffle is arranged in the cone-shaped suction nozzle; the grid baffle prevents crushed stone from entering the suction pipe 6. Wherein, the inlet at the lower end of the suction nozzle 6-1 is in a truncated cone shape with the height of 2cm, the built-in grid baffle is a rectangular body with the length of 2cm multiplied by 2cm, and the grid baffle can effectively prevent broken stones from entering the suction pipe 6.
Specifically, the high-pressure water gun 7 is arranged at two sides of the main rod 10, the inlet end of the upper section is connected with the high-pressure water pump, the middle part is fixed with the power device 2 through the lock catch 10, the lower end passes through the fixed beam 9 to be clamped in the U-shaped groove 11, and the lower end is higher than the horizontal position of the mud suction nozzle 6-1; namely, the lower end of the high-pressure water gun 7 passes through the fixed beam 9 and is clamped in the U-shaped groove 11 for a certain length but is higher than the horizontal position of the suction nozzle 6-1, the high-pressure water pump is 3BP-57, the flow rate is 50m 3/h, the lifting length is 57m, and the matched power is 15kw.
The novel lifting device further comprises balancing weights, wherein the balancing weights are symmetrically clamped at two sides of the main rod 1 and are sequentially overlapped upwards by taking the fixing plate 5 as a bottom, the length of each balancing weight is 35cm, the width of each balancing weight is 17cm, the thickness of each balancing weight is 10cm, and the hollow part at the inner side is a semicircle with the diameter of 22 cm.
The device also comprises a plurality of threaded sleeves with the outer diameter of 22cm and the length of 1m, and the threaded sleeves are connected end to end in sequence to increase the length of the main rod 1 of the device, so that the device is simple to operate and high in applicability.
Specifically, the double-shaft soil twisting device sequentially penetrates through the fixed beam 9 and the fixed plate 5, is connected with the main rod 1, and the fixed beam 9 and the fixed plate 5 are welded on the main rod 1 and provide vertical supporting force for bearing the dead weight of the soil twisting device and impact counter force.
In order to better achieve the purpose of the invention, the invention also provides a use method of the hydraulic punching cutter suction equipment for the inner support foundation pit engineering, which comprises the following steps:
1) Removing sundries such as sundries and filling soil on the surface layer of the foundation pit through mechanical excavation, and digging the foundation pit to the bottom surface of the first inner support 15;
2) Pouring a first concrete inner support 15, reserving bolts, continuously excavating downwards for 2m, and installing an I-shaped steel rail 14 and an electric hoist 13;
3) Lifting and arranging hydraulic flushing cutter suction equipment by using the electric hoist 13 in the step 2);
4) The excavation construction adopts an excavation sequence of firstly center and then periphery, hydraulic excavation is used for downwards excavating to the bottom surface of a lower channel support, a lower concrete inner support 15 is poured, bolts are reserved, downwards excavation is continued for 2m, and an electric hoist 13 and hydraulic excavation cutter suction equipment are installed; and so on, stopping using the hydraulic flushing until the flushing is carried out to a position which is 0.3m away from the substrate, and completing the flushing by manual bottoming.
The invention provides a use method of hydraulic punching cutter suction equipment for an internal support foundation pit project, which mainly comprises the following steps:
1) Surface soil body excavation: removing sundries such as sundries and filling soil on the surface layer of the foundation pit through mechanical excavation, and excavating to the bottom surface of the first concrete inner support 15;
2) Construction of the first concrete inner support and installation of the I-shaped steel rail 14 of the CD1 type electric hoist 13: the inner support 15 is provided with an additional load of 205kN/m-479kN/m of required I-steel, bolts are reserved during construction of the inner support 15, the I-steel track 14 is fixedly connected with the inner support 15 through the bolts, and then the electric hoist 13 is installed and the excavation equipment is deployed for entering;
3) And (3) pipeline laying: the conveying pipeline is paved along a land flat zone, the pipeline is flat and straight, the bending degree is required to be gentle, and dead bending is avoided; the mud discharging pipe joint should be tightly fastened, the whole pipeline and the joint cannot leak mud and water, and the leakage is found and should be repaired or replaced in time; the mud pipe fixing support must be firm and reliable and must not be inclined or rocked;
4) And (3) workload arrangement: the slurry flow rate of the single hydraulic flushing device is 200m 3/h, calculated by mud/water=1:5, and the maximum daily workload of each device is 800m 3; according to the actual condition of the site and the construction scheduling, the quantity of hydraulic flushing equipment and the working time of hydraulic flushing are arranged, so that the continuous and effective progress of foundation pit earthwork excavation is ensured;
5) And (3) hydraulic flushing construction: the hydraulic excavating is used for excavating downwards to the bottom surface of a lower channel support, a next concrete inner support is poured, an I-shaped steel rail is reserved for installing bolts, then the downward excavating is continued for 2m, an electric hoist and an excavating device are installed, the excavating device is used for moving and constructing in a foundation pit through the I-shaped steel rail, and the excavating device is used for directly extracting water from a water source (a river or a tap water pipe) for excavating; the dredged mud is pumped out by a mud suction pipe fixed on equipment, is transported to a temporary mud pool beside a foundation pit through a pipeline for primary sedimentation, is transported to a mud ship at a river side wharf through the pipeline, is subjected to secondary sedimentation in the mud ship to further reduce the water content of the mud, is transported to a spoil area after the mud ship is fully loaded, is dredged in a first-central and later-peripheral excavation mode, follows a layered, uniform and symmetrical excavation principle, reduces the soaking time of the periphery of the foundation pit as much as possible, and reserves a part of soil mass at a slope angle and a slope surface of the foundation pit, adopts mechanical cooperation for manual transportation, and stops hydraulic dredging at a position of 0.3m away from a base in excavation of the foundation pit, and completely uses manual excavation.
The technical features of the present invention that are not described in the present invention may be implemented by or using the prior art, and are not described in detail herein, but the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be within the scope of the present invention by those skilled in the art.
Claims (8)
1. The utility model provides a use method of interior support foundation ditch engineering's hydraulic flushing cutter suction equipment, hydraulic flushing cutter suction equipment includes mobile jib (1), connect in power device (2) on mobile jib (1) and fixed beam (9), by power device (2) driven biax cutter soil device, biax cutter soil device runs through and connects in fixed beam (9) and fixed plate (5), biax cutter soil device's diaxon symmetry sets up, every biax cutter soil device all includes hydraulic motor (3), hydraulic motor bottom axial connection has power output shaft (4) by its drive, power output shaft (4) are connected with reamer head (8), still include the suction tube (6) of nestification in mobile jib (1), and set up in mobile jib (1) both sides, follow power device (2) top access and extend high-pressure squirt (7) of inserting fixed plate (5), its characterized in that the use method includes the following steps:
Step 1), removing sundries such as sundries and filling soil on the surface layer of a foundation pit through mechanical excavation, and digging the sundries to the bottom surface of a first concrete inner support (15);
step 2), pouring a first concrete inner support (15) and reserving bolts, continuously excavating downwards for 2.5m, fixedly connecting an I-shaped steel rail (14) with the inner support through the bolts, and then installing an electric hoist and deploying an excavating equipment for entering;
step 3), lifting and arranging hydraulic punching cutter suction equipment by using the electric hoist (13) in the step 2);
Step 4), excavating construction, namely excavating downwards to the bottom surface of the next support by adopting an excavation sequence of the center and the periphery, pouring the next concrete internal support and reserving bolts, continuing downwards excavating for 2m, and installing an electric hoist (13) and hydraulic excavating cutter suction equipment; and so on, stopping using the hydraulic flushing until the flushing is carried out to a position which is 0.3m away from the substrate, and completing the flushing by manual bottoming.
2. Use according to claim 1, characterized in that each shaft of the double-shaft soil-wringing device comprises the hydraulic motor (3), the lower end of the hydraulic motor (3) being connected to the fixed beam (9) by means of screws; the bottom end of the hydraulic motor (3) is connected with a power output shaft (4) driven by the hydraulic motor, and the power output shaft (4) vertically extends downwards; the reamer head (8) is fixed at the lower end of the power output shaft (4), and is driven to rotate by the power output shaft (4).
3. The use method according to claim 1, characterized in that the lower part of the reamer head (8) is a double-screw drill bit (8-1), the middle part of the reamer head is provided with a plurality of reamer teeth (8-2), the reamer teeth (8-2) are spirally distributed, and grooves (8-4) are arranged among the reamer teeth (8-2) along the bus direction of the reamer head (8); the upper part is provided with wing plates (8-3), the wing plates (8-3) are four mutually perpendicular steel plates with trapezoidal cross sections and narrow upper part and wide lower part, and the wing plates (8-3) are welded and fixed by an outer fixing ring (8-5).
4. The use method according to claim 1, wherein the main rod (1) is a hollow thin-wall steel pipe, the inner wall of the upper end is provided with threads, the main rod (1) is connected with a threaded sleeve (12), the threaded sleeve (12) is that the mud suction pipe (6) is nested in the main rod (1), the outlet end of the upper section of the mud suction pipe (6) is connected with a mud suction pump, the lower end passes through the fixed plate (5) and is lower than the horizontal position of the reamer head (8), and the tail part of the mud suction pipe is connected with a mud suction nozzle (6-1).
5. The use method according to claim 4, wherein the suction nozzle (6-1) is connected to the bottom inlet of the suction pipe (6), the lower inlet is in a truncated cone shape, and a grid baffle is arranged in the lower inlet.
6. The use method according to claim 4, wherein the high-pressure water gun (7) is arranged at two sides of the main rod (1), the inlet end of the upper section is connected with the high-pressure water pump, the middle section is fixed with the power device (2) through a lock catch (10), the lower end passes through the fixed beam (9) to be clamped in the U-shaped groove (11), and the lower end is higher than the horizontal position of the suction nozzle (6-1).
7. The use method according to claim 1, wherein the double-shaft soil twisting device sequentially penetrates through the fixing beam (9) and the fixing plate (5) to be connected with the main rod (1), and the fixing beam (9) and the fixing plate (5) are welded on the main rod (1).
8. The use method according to claim 1, wherein the hydraulic punching cutter suction device further comprises balancing weights, wherein the balancing weights are symmetrically clamped on two sides of the main rod (1), and the balancing weights are stacked upwards in sequence by taking the fixing plate (5) as a bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910811579.2A CN110439048B (en) | 2019-08-29 | Hydraulic punching cutter suction equipment and method for inner support foundation pit engineering |
Applications Claiming Priority (1)
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| CN201910811579.2A CN110439048B (en) | 2019-08-29 | Hydraulic punching cutter suction equipment and method for inner support foundation pit engineering |
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| CN110439048A CN110439048A (en) | 2019-11-12 |
| CN110439048B true CN110439048B (en) | 2024-06-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204753676U (en) * | 2015-06-23 | 2015-11-11 | 深圳滨海万盈海洋工程技术有限公司 | Utilize water pump to erode sludger of mud layer |
| CN206829216U (en) * | 2017-05-24 | 2018-01-02 | 中交天航滨海环保浚航工程有限公司 | A kind of cutter suction dredger Novel rimmer |
| CN208183839U (en) * | 2018-05-07 | 2018-12-04 | 中铁大桥局集团第一工程有限公司 | A kind of strand suction suction dredge |
| CN210766939U (en) * | 2019-08-29 | 2020-06-16 | 南京江北新区中心区发展有限公司 | Hydraulic flushing, digging, reaming and sucking equipment for inner support foundation pit engineering |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204753676U (en) * | 2015-06-23 | 2015-11-11 | 深圳滨海万盈海洋工程技术有限公司 | Utilize water pump to erode sludger of mud layer |
| CN206829216U (en) * | 2017-05-24 | 2018-01-02 | 中交天航滨海环保浚航工程有限公司 | A kind of cutter suction dredger Novel rimmer |
| CN208183839U (en) * | 2018-05-07 | 2018-12-04 | 中铁大桥局集团第一工程有限公司 | A kind of strand suction suction dredge |
| CN210766939U (en) * | 2019-08-29 | 2020-06-16 | 南京江北新区中心区发展有限公司 | Hydraulic flushing, digging, reaming and sucking equipment for inner support foundation pit engineering |
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