CN114032884A - Stable high-bearing recyclable twisted thread expanded steel pile - Google Patents
Stable high-bearing recyclable twisted thread expanded steel pile Download PDFInfo
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- CN114032884A CN114032884A CN202111324783.5A CN202111324783A CN114032884A CN 114032884 A CN114032884 A CN 114032884A CN 202111324783 A CN202111324783 A CN 202111324783A CN 114032884 A CN114032884 A CN 114032884A
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- 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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- 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
- E02D5/56—Screw piles
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- 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
- E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
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Abstract
The invention relates to a stable high-bearing recyclable screwed expanded steel pile, which comprises a screw thread expanded body, a hydraulic power head and a first connection, and has the beneficial effects that: this stabilize high recoverable screw thread expanded metal piling that revolves that bears improves on current basis, and the resistance piece on the device utilizes recoverable high recoverable screw thread expanded metal piling technique that revolves that bears of recoverable stability, but because its machinery is little, the multi-angle construction, has solved the construction space problem of shortage, because of ingenious utilization helical blade cuts soil and realizes not having vibrations and creeps into. The silence environmental protection utilizes helical blade reverse soil cutting to realize 100% recoverable simultaneously, and helical blade has increased substantially steel pipe pile bearing capacity and bearing capacity's stability as partly of supporting body simultaneously. Secondly, because the spiral expansion body can provide enough bearing capacity to meet the requirement of general design, grouting is not needed. The bearing capacity thus provided is instantaneous, i.e. provides a bearing capacity that meets the design requirements. And the construction at 360 degrees can be realized.
Description
Technical Field
The invention relates to the technical field of steel pipe piles, in particular to a stable high-bearing recyclable screwed expanded steel pile.
Background
With the progress of the times, more and more complex buildings with multiple sources in urban complex operation modes are continuously evolved, and the construction of large-area foundation pits attached to project engineering is increased. The conventional cantilever pile and inner support supporting form is widely used, but has the defects that: the cost is high, the construction speed is slow, and the subsequent support demolition worker noise, dust emission and other environmental pollution are serious. Therefore, the demand of unsupported construction forms is increasing.
The existing construction technologies such as unsupported construction, foundation reinforcement, river revetment reinforcement and slope reinforcement mainly have the following problems: the existing support-free supporting technology in the market has the defects of high construction difficulty, limited application scene and high general manufacturing cost; the conventional foundation reinforcement and river course revetment reinforcement processes have the disadvantages of high construction cost and limited construction application scenes; for the reinforcement of a high soil slope, the accidental conditions of hole collapse, hole shrinkage and the like easily occur in the anchor rod hole forming in the conventional anchor rod frame construction process, and the construction quality is influenced; in the transportation process, the situations of steel bar bending, locator loosening and the like can occur, the reinforcing effect is influenced, and the device cannot automatically stop rotating when meeting rock strata in the use process, and has poor functionality.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a stable high-bearing recyclable twisted thread expanded steel pile to solve the problem that the construction quality is affected by the accident conditions that hole collapse, hole shrinkage and the like easily occur in the conventional anchor rod frame construction process for reinforcing the high soil slope; in the transportation process, the problems of bending of the reinforcing steel bars, loosening of the positioner and the like can occur.
The technical scheme for solving the technical problems is as follows: a stable high-bearing recoverable twisted thread expanded steel pile comprises a thread expanded body, a hydraulic power head, a first connecting cylinder, an electric telescopic rod and a traction steel rope, wherein the front end of the hydraulic power head is fixedly connected with the first connecting cylinder, the electric telescopic rod is fixedly arranged inside the first connecting cylinder, the traction steel rope is fixedly arranged on each of the left side and the right side of the front end of the electric telescopic rod, a guide wheel is rotatably connected to the surface of the traction steel rope in the first connecting cylinder, inner grooves are formed in each of the left side and the right side of the inside of the first connecting cylinder, a first spring is fixedly arranged inside each inner groove, and the front end of the first spring and the front end of the traction steel rope are fixedly connected with a resistance block; the utility model discloses a steel pipe pile, including first connecting cylinder, second connecting cylinder, overlap joint section of thick bamboo, connecting pipe, wire rope.
The invention has the beneficial effects that:
1) the stable high-bearing recyclable screwed expanded steel pile has a better effect, the technology of the recyclable stable high-bearing recyclable screwed expanded steel pile is improved on the basis of the prior art, and the problem that other supporting piles and reinforcing piles are difficult to penetrate through compact soil layers due to spiral drilling construction is solved; the technology of the recyclable, stable, high-bearing and recyclable screwed expanded steel pile is utilized, and the problem of high construction cost is solved because the technology can be recycled; by utilizing the technology of the recyclable, stable, high-bearing and recyclable screwed expanded steel pile, the problem of construction space shortage is solved due to small machinery and multi-angle construction; the technology of the recyclable, stable, high-bearing and recyclable screwed expanded steel pile is utilized, and the construction speed is high, the steel pile becomes effective immediately after construction is finished, and the subsequent construction period of the cast-in-place concrete structure is limited by the cement condensation hardening period; the helical blade is skillfully adopted to cut soil to realize vibration-free drilling; the spiral blade is used for reversely cutting soil to realize 100 percent recoverability; the helical blade is used as a part of the bearing body, so that the bearing capacity and the stability of the bearing capacity are greatly improved; the spiral expansion body can provide enough bearing capacity to meet the general design requirement, and grouting is not needed, so that the provided bearing capacity has instantaneity, namely, the bearing capacity meeting the design requirement is provided; can realize 360-degree construction.
2) This it is better to stabilize high-bearing recoverable wrong screw thread enlarged footing piling effect, the device is through the hold-in range and the thread bush that set up, make the device can utilize the rotation of self to make the steel-pipe pile body can be to automatic water spray around, and can also utilize the kicking block to the inside clearance plug of through-hole, the functionality of device has been promoted, simultaneously can also utilize the inside resistance piece of traction steel cable pulling device on the device, make the resistance piece can dock first connecting cylinder and second connecting cylinder, the resistance piece can contract automatically when the moment of torsion is too big, make the inside slip of first connecting cylinder at the second connecting cylinder, thereby make the device can be when meetting the stratum automatic protection steel-pipe pile and stall, security when having promoted the use.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the outer wall of the first connecting cylinder and the inner wall of the second connecting cylinder are mutually attached, and the central axes of the first connecting cylinder, the second connecting cylinder and the connecting pipe are all on the same straight line; the longitudinal section of the resistance block is trapezoidal, the resistance blocks are distributed at equal angles on the outer side of the first connecting cylinder, the resistance blocks form a sliding structure with the first connecting cylinder through the inner grooves and the traction steel ropes, and the resistance blocks form an elastic structure with the first connecting cylinder through the first springs.
The beneficial effect who adopts above-mentioned further scheme is that, make the device can be when the resistance increases through first connecting cylinder and the second connecting cylinder on the device for the inside resistance piece of the device is automatic to be shrunk, makes first connecting cylinder slip in the second connecting cylinder, makes the device can be when meetting the stratum automatic stall.
Furthermore, the second connecting cylinder and the first connecting cylinder form a clamping structure through a resistance block and a butt joint groove, and the resistance block and the butt joint groove correspond to each other; the connection mode between connecting pipe and the overlap joint section of thick bamboo is the bearing connection, first synchronous belt is installed in the middle meshing of otter board, and the left side meshing of first synchronous belt is connected with first connecting axle, and the left side meshing of first connecting axle is connected with the second hold-in range, and the left side meshing of second hold-in range is connected with the second connecting axle.
Adopt above-mentioned further scheme's beneficial effect to be, make the second connecting cylinder pivoted in-process can drive the rotation of second connecting axle through first hold-in range and second hold-in range on the device.
Further, side connection plates are fixedly arranged on the periphery of the second connection shaft, the outer walls of the side connection plates are mutually attached to the inner wall of the water inlet pipe, the water inlet pipe forms a rotating structure through a lapping cylinder and a connection pipe, and the first connection shaft forms a rotating structure through a first synchronous belt and the water inlet pipe; the connecting shaft and the side connecting plate form a rotating structure with the water inlet pipe through the first connecting shaft and the second synchronous belt, and the side connecting plate is distributed on the surface of the connecting shaft at equal angles.
Adopt above-mentioned further scheme's beneficial effect to be, the rotation through the second connecting axle makes the side fishplate bar rotate in the inside of inlet tube for the device can be automatically to the interior pump income rivers of stake, so that soften the work when meetting harder soil property.
Furthermore, a lap plate is welded inside the threaded sleeve, a through hole is formed in the surface of the lap plate, a movable groove is formed in the connecting pipe, a sealing plate is attached to the inside of the movable groove, a connecting plate is fixedly connected to the right side of the sealing plate, the connecting plate is connected with the connecting pipe through a second spring, a third spring is fixedly arranged inside the connecting plate, a baffle is fixedly connected to the front end of the third spring, a diagonal plane is formed in the left side of the front end of the baffle, ejector blocks are distributed on the left side of the connecting plate at equal intervals, and the ejector blocks correspond to the through holes one by one; ejector rods are distributed on the right side of the lap joint plate at equal intervals, the oblique planes on the left sides of the front ends of the adjacent two baffle plates correspond to the ejector rods, the front ends of the ejector rods are hemispheroids, and the baffle plates and the connecting plate form a telescopic structure through the ejector rods and the third springs.
The beneficial effects of adopting above-mentioned further scheme are that, make the device can utilize the rotation of pile body self to realize the function of automatic stifled and slip casting through the extending structure on the device, promoted the functional of device, the second spring on the device makes the thread bush of each inside position of device can be outside water injection in step and lead to stifled in addition, has promoted the practicality of device.
Further, a thread expanding body is arranged outside the steel pipe pile body.
Furthermore, the diameter of the thread expanding body ranges from 0.3 to 1.5 meters.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the first connecting cylinder of the present invention;
FIG. 3 is a schematic front cross-sectional structural view of the present invention;
FIG. 4 is a schematic diagram of the structure at A in FIG. 3 according to the present invention;
FIG. 5 is a schematic diagram of the structure of FIG. 3 at B in accordance with the present invention;
FIG. 6 is a schematic view of the connection of the connector tubes and connector tiles of the present invention;
FIG. 7 is a schematic view of the structure of FIG. 6 at C in accordance with the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. the hydraulic power head comprises a hydraulic power head, 2, a first connecting cylinder, 3, an electric telescopic rod, 4, a traction steel rope, 5, a guide wheel, 6, a resistance block, 7, an inner groove, 8, a first spring, 9, a second connecting cylinder, 10, a butt joint groove, 11, a connecting pipe, 12, a lap joint cylinder, 13, a screen plate, 14, a first synchronous belt, 15, a first connecting shaft, 16, a second synchronous belt, 17, a second connecting shaft, 18, a side joint plate, 19, a water inlet pipe, 20, a steel pipe pile body, 21, a threaded sleeve, 22, a lap joint plate, 23, a through hole, 24, a movable groove, 25, a sealing plate, 26, a second spring, 27, a joint plate, 28, a third spring, 29, a baffle plate, 30, a communication groove, 31, a top block, 32 and a top rod. 33. Thread enlarging body
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
At present, the conventional support-free support mainly has the following forms:
the inclined throwing support has the advantages that the inclined throwing support is in the form of the bottom plate type bracket base, so that a plurality of problems are caused in the construction process. Such as requiring segmentation at the base plate. And the bottom plate is constructed in stages, so that the sealing time of the bottom plate at the bottom of the foundation pit is prolonged and the foundation pit is unsafe. Meanwhile, soil is reserved in the pit. Causing the excavation of the area to become difficult. Thereby prolonging the construction period. In the current economic situation, the extension of the construction period means an increase in the construction cost and an increase in the financial cost. Making their use increasingly limited.
The self-stabilizing foundation pit support is developed, popularized and applied by Shanghai rock and soil exploration and design group, and is mainly characterized in that a front-supporting grouting steel pipe is adopted for diagonal bracing, and meanwhile, soil in a pit does not need to be reserved. Therefore, the construction period is greatly shortened, the construction efficiency is improved, and good economic benefits are brought to the engineering. The method has the advantages especially in the foundation pit with the depth of 5m-9m in a large-area foundation pit. However, the supporting system basically adopts cast-in-place piles or vertical supporting piles, the construction cost is high, pile pressing is difficult when the steel pipes are in a hard soil layer for construction, vibration is large, construction noise pollution is obvious, meanwhile, the angle of the front supporting steel pipe is large, the front supporting steel pipe needs to penetrate through a bottom plate and a middle floor plate, and the later waterproof construction requirement is high.
The double-row inclined pile is mainly developed and popularized by Tianjin City group and Tianjin university at present, is suitable for the depth of a foundation pit between 4m and 6m, mainly adopts a straight-inclined mode or a 2 straight-2 inclined mode in an inclined-straight alternating mode, mainly adopts a high-strength C80 prestressed concrete rectangular pile, and has the cross section size, the effective pile length of 15m and the pile center distance of 0.6 m. Because it adopts the prestressed rectangular pile, there are 2 disadvantages, the first, can't recycle, the fabrication cost is high, the second because of needing the static pressure pile machine apparatus of the special processing to construct, its application range is limited to a certain extent;
the existing support-free supporting technology in the market has the defects of high construction difficulty, limited application scene and high general manufacturing cost; the conventional foundation reinforcement and river course revetment reinforcement processes have the disadvantages of high construction cost and limited construction application scenes; for the reinforcement of a high soil slope, the accidental conditions of hole collapse, hole shrinkage and the like easily occur in the anchor rod hole forming in the conventional anchor rod frame construction process, and the construction quality is influenced; in the transportation process, the situations of bending of the steel bars, loosening of the positioner and the like may occur.
And the existing steel pipe pile can not utilize the rotation of the existing steel pipe pile to carry out dredging and blocking and use aiming at hard soil, and has poor functionality, and the inventor provides a stable and high-bearing recyclable screwed expanded steel pile to solve the problems.
The present invention provides the following preferred embodiments
As shown in fig. 1-4, a stable high-bearing recoverable screw-threaded expanded steel pile comprises a screw-threaded expanded body, a hydraulic power head 1, a first connecting cylinder 2, an electric telescopic rod 3 and a traction steel cable 4, wherein the front end of the hydraulic power head 1 is fixedly connected with the first connecting cylinder 2, the electric telescopic rod 3 is fixedly arranged inside the first connecting cylinder 2, the traction steel cable 4 is fixedly arranged on each of the left side and the right side of the front end of the electric telescopic rod 3, a guide wheel 5 is rotatably connected to the first connecting cylinder 2 on the surface of the traction steel cable 4, inner grooves 7 are formed in each of the left side and the right side inside the first connecting cylinder 2, a first spring 8 is fixedly arranged inside each of the inner grooves 7, a resistance block 6 is fixedly connected to the front end of the first spring 8 and the front end of the traction steel cable 4, and the resistance block 6 enables the first connecting cylinder 2 of the device to be automatically blocked when being subjected to a large resistance; the laminating of the outside of first connecting cylinder 2 is provided with second connecting cylinder 9, the butt joint groove 10 that is used for placing resistance piece 6 is offered to the inside of second connecting cylinder 9, the fixed connecting pipe 11 that is provided with in front end of second connecting cylinder 9, the first half fixed mounting of connecting pipe 11 has otter board 13, a bridging section of thick bamboo 12 is installed in the outside of connecting pipe 11, the left side fixedly connected with inlet tube 19 of a bridging section of thick bamboo 12, the fixed steel-pipe pile body 20 that is provided with in the outside of connecting pipe 11 front end, the threaded sleeve 21 is installed to the surface thread of connecting pipe 11 front end, threaded sleeve 21 can overhaul the inside mediation structure of device, the screw thread enlarged body sets up the outside at steel-pipe pile body 20.
In this embodiment, as shown in fig. 2 to 4, in order to further improve the safety of the steel pipe pile during use, the outer wall of the first connecting cylinder 2 and the inner wall of the second connecting cylinder 9 are attached to each other, and the central axes of the first connecting cylinder 2, the second connecting cylinder 9 and the connecting pipe 11 are all on the same straight line; the longitudinal section of the resistance block 6 is trapezoidal, the resistance block 6 is distributed at equal angles on the outer side of the first connecting cylinder 2, the resistance block 6 forms a sliding structure with the first connecting cylinder 2 through the inner groove 7 and the traction steel rope 4, and the resistance block 6 forms an elastic structure with the first connecting cylinder 2 through the first spring 8; the device can automatically contract the resistance block 6 inside the device when the resistance is increased through the first connecting cylinder 2 and the second connecting cylinder 9 on the device, so that the first connecting cylinder 2 slides in the second connecting cylinder 9, and the device can automatically stop rotating when meeting rock strata.
In this embodiment, as shown in fig. 3 to 5, in order to further improve the convenience of using the steel pipe pile, the second connecting cylinder 9 forms a clamping structure with the first connecting cylinder 2 through the resistance block 6 and the butt-joint groove 10, and the resistance block 6 and the butt-joint groove 10 correspond to each other; the connecting mode between the connecting pipe 11 and the lapping cylinder 12 is bearing connection, a first synchronous belt 14 is meshed and installed in the middle of the screen plate 13, the left side of the first synchronous belt 14 is meshed and connected with a first connecting shaft 15, the left side of the first connecting shaft 15 is meshed and connected with a second synchronous belt 16, and the left side of the second synchronous belt 16 is meshed and connected with a second connecting shaft 17; the second connecting shaft 17 can be driven to rotate in the process of rotating the second connecting cylinder 9 through the first synchronous belt 14 and the second synchronous belt 16 on the device.
In this embodiment, as shown in fig. 1, 3 and 6-7, in order to further improve the functionality of the steel pipe pile, a side connection plate 18 is fixedly disposed around the second connection shaft 17, an outer wall of the side connection plate 18 is attached to an inner wall of the water inlet pipe 19, the water inlet pipe 19 forms a rotation structure with the connection pipe 11 through the overlapping cylinder 12, and the first connection shaft 15 forms a rotation structure with the water inlet pipe 19 through the first synchronization belt 14; the second connecting shaft 17 and the side connecting plate 18 form a rotating structure through the first connecting shaft 15, the second synchronous belt 16 and the water inlet pipe 19, and the side connecting plate 18 is distributed on the surface of the second connecting shaft 17 at equal angles; the side joint plate 18 is rotated inside the water inlet pipe 19 through the rotation of the second connecting shaft 17, so that the device can automatically pump water flow into the pile to perform softening work when hard soil is met.
In this embodiment, as shown in fig. 6 to 7, in order to further improve the use effect of the steel pipe pile, the inner part of the thread bushing 21 is welded with the connecting plate 22, the surface of the connecting plate 22 starts to be provided with the through hole 23, the inner part of the connecting pipe 11 is provided with the movable groove 24, the inner part of the movable groove 24 is provided with the sealing plate 25 in a fitting manner, the right side of the sealing plate 25 is fixedly connected with the connecting plate 27, the connecting plate 27 is connected with the connecting pipe 11 through the second spring 26, the inner part of the connecting plate 27 is fixedly provided with the third spring 28, the front end of the third spring 28 is fixedly connected with the baffle plate 29, the left side of the front end of the baffle plate 29 is provided with the chamfered surface, the left side of the connecting plate 27 is provided with the top blocks 31 at equal intervals, and the top blocks 31 correspond to the through holes 23 one to one another; ejector rods 32 are distributed on the right side of the lapping plate 22 at equal intervals, the oblique planes on the left sides of the front ends of the adjacent two baffle plates 29 correspond to the ejector rods 32, the front ends of the ejector rods 32 are hemispheroids, and the baffle plates 29 form a telescopic structure with the connecting plate 27 through the ejector rods 32 and the third springs 28; the device can realize the automatic function of leading to stifled and water injection through the rotation of the pile body self through the extending structure on the device, has promoted the functionality of device, and the second spring 26 on the device makes the threaded sleeve 21 of each inside position of device can be synchronous outside water injection and lead to stifled.
Example two
The difference between this embodiment and the above embodiment is that the exterior of the steel pipe pile body 20 is provided with a thread expansion body with a variable diameter, so that the stability of the riser is improved, and the diameter of the thread expansion body is generally 0.3-1.5m, as shown in fig. 3.
The length of the helical blade for stably and highly bearing the recoverable screwed expanded steel pile helical expansion is changed as follows:
the specific working process of the invention is as follows:
(1) automatic protection function of steel pipe pile
At first, drive first connecting cylinder 2 through hydraulic power head 1 and rotate, first connecting cylinder 2 drives second connecting cylinder 9 through the inside resistance piece 6 of inside groove 7 and rotates, when meetting the stratum, support the inner wall of butt joint groove 10 through the outer wall of resistance piece 6, make the inside of the automatic indentation inside groove 7 of resistance piece 6 pressurized, thereby make the device can be when receiving great resistance, first spring 8 is automatic to be compressed, first connecting cylinder 2 is at the outside slip of second connecting cylinder 9 this moment, make steel-pipe pile body 20 can stall automatically when meetting the stratum, thereby play the protect function to steel-pipe pile body 20.
(2) Adjusting the maximum torque to be applied
Through the traction steel rope 4 on the electric telescopic handle 3 pulling leading wheel 5 for traction steel rope 4 can stimulate resistance piece 6, makes resistance piece 6 compress first spring 8, thereby adjusts first spring 8's elasticity, makes the device can break away from the required torsion in the butt joint groove 10 to resistance piece 6 and adjusts.
(3) Automatic grouting
When meetting harder soil, through the left side access water source at inlet tube 19, can drive first connecting axle 15 through first hold-in range 14 and rotate at connecting tube 11 pivoted in-process, first hold-in range 14, first connecting axle 15 can drive second hold-in range 16 and second connecting axle 17 and rotate, the inside of connecting tube 11 and otter board 13 is sent into through the automation of the water of side joint board 18 in with inlet tube 19 when second connecting axle 17 rotates, thereby make the device can be automatic to the inside water injection of connecting tube 11.
(4) Automatic dredging
The water pressure in the connecting pipe 11 is increased to abut against the connecting plates 27 on the side surfaces of the threaded sleeves 21 at all positions, the connecting plates 27 move on the connecting pipe 11 through the movable grooves 24, the sealing plates 25 and the second springs 26, so that the top blocks 31 can automatically perform unblocking work on the through holes 23 in the connecting plates 22, meanwhile, the ejector rods 32 eject the column baffles 29, so that the third springs 28 are contracted, the left side and the right side of the communicating grooves 30 are communicated with each other, and the functions of automatic water injection and unblocking are realized;
when the pile is used, a vertical support pile, such as a vertical support pile, is constructed in advance, and after the vertical support pile is constructed, the pile head of the stable high-bearing recyclable screwed expanded steel pile is connected with a spiral drilling machine, so that the ground is broken by a spiral drilling mode for construction. When different construction scenes are adopted, the spiral drilling machine can be used for adjusting, and the pile body can vertically support the pile to form an inclination angle of 15-45 degrees so as to realize different support requirements; the hard soil can be cut loose by utilizing the soil cutting teeth of the stable high-bearing recyclable twisted thread expanded steel pile drill bit, the pressure of the soil body on the pile body can be reduced by the combined helical blade which extends afterwards, so that the whole pile body can be conveniently conveyed downwards, and after the construction reaches a preset elevation, the helical blade structure forms an expanded head to provide bearing capacity for the steel pile body; the pile end is grouted and reinforced by using a pre-buried stable high-bearing recyclable grouting pipe for the twisted thread expanded steel pile, wherein cement-water glass double-liquid grouting parameters comprise a water glass modulus M of 2.8-3.1, a water glass solution concentration Be' of 35-40, a cement paste water cement ratio W/C of 0.75: 1-1.0: 1 (weight ratio), a cement paste water glass of 1: 0.5-1: 1.0 (volume ratio), a grouting pressure of 0.6-3.5 MPa, and a grout diffusion radius of 0.5-2.0M, so that a good reinforcing effect can Be realized.
The thread enlarging body is a spiral blade group which is composed of a plurality of spiral blades with different diameters and is arranged along the length direction of the pile body.
In summary, the following steps: the invention has the beneficial effects that the device is improved on the basis of the prior art, and the problem that other support piles and reinforcing piles are difficult to penetrate through a compact soil layer due to spiral drilling construction is solved by utilizing the technology of utilizing the recyclable, stable and high-bearing recyclable screwed expanded steel pile; the technology of the recyclable, stable, high-bearing and recyclable screwed expanded steel pile is utilized, and the problem of high construction cost is solved because the technology can be recycled; by utilizing the technology of the recyclable, stable, high-bearing and recyclable screwed expanded steel pile, the problem of construction space shortage is solved due to small machinery and multi-angle construction; the technology of the recyclable, stable, high-bearing and recyclable screwed expanded steel pile is utilized, and the construction speed is high, the steel pile becomes effective immediately after construction is finished, and the subsequent construction period of the cast-in-place concrete structure is limited by the cement condensation hardening period;
the bearing system of the expansion head is reliable and stable, and can provide large and stable bearing force. 100 percent of full recovery, 360 degrees of construction angle, changeable diameter of the full-section thread expanded body, secondary grouting capable of increasing bearing capacity, high construction speed, high working efficiency, low cost, silence and environmental protection.
In addition, due to the fact that the hydraulic power head is adopted for rotary drilling, the large-diameter threaded blade can immediately provide stable and sufficient bearing capacity, and therefore the special effect is added when the special tool is used for foundation pit accident emergency, and the special tool can be used in various dangerous scenes needing emergency repair and reinforcement support.
(1) The twisted threaded steel pipe pile is adopted to support the steel pipe pile in advance, the steel pipe pile extends into an underground bottom plate for 7-20 m, and an enlarged head formed by twisting the spiral blades is powerful to provide enough bearing counter force, so that the defect of the form of obliquely throwing the bottom plate type bracket base is overcome, and the problem of secondary partition bottom plate construction is solved. The soil is not required to be kept.
(2) The adoption of the screwed steel pipe pile solves several disadvantages of self-stabilizing foundation pit support
The rotary drilling mode solves the defect that self-stabilizing steel pipe pile construction needs vibration equipment with large noise due to the adoption of a high-power hydraulic rotary power head.
Secondly, due to the adoption of a high-power hydraulic rotary power head, the defects that a hard soil layer or a longer steel pipe pile needs to be drilled by a bolting machine in the self-stabilizing foundation pit support and mud pollution is caused by the drilling and screwing of the threaded steel pipe pile are overcome.
And thirdly, the threaded steel pipe pile expanded head with the diameter of 0.3-1.5m and formed by the helical blades can be formed by adopting the threaded blades with different diameters, so that the expanded head can provide enough large bearing capacity and stable bearing capacity.
And fourthly, because the helical blades can form the large-diameter expansion head, enough bearing capacity can be provided, so that the bearing capacity is improved without grouting under the same condition, and the problem of prolonging the construction period and increasing the cost caused by grouting is solved.
(3) The adoption of the screwed steel pipe pile solves the defects of the existing structure foundation reinforcement and the construction of the anti-floating anchor rod pile.
The expanded head of the threaded steel pipe pile with the diameter of 0.3-1.5m and composed of the helical blades can be formed by adopting the threaded blades with different diameters, and the expanded head can provide enough large bearing capacity and stable bearing capacity. The problem of insufficient bearing capacity caused by grouting is solved without expanding head grouting.
Secondly, the threaded steel pipe pile expanded head with the diameter of 0.3-1.5m and composed of the helical blades can be formed by adopting the threaded blades with different diameters, so that the expanded head can provide enough bearing capacity and stable bearing capacity. The shortcoming that the anchor rod pile is small in diameter and low in bearing capacity is overcome.
And thirdly, the steel pipe is directly connected to the bottom plate, and the problem of difficult water prevention is solved by adopting the steel sheet water stop sheet.
(4) The adoption of the twisted threaded steel pipe pile solves several defects of revetment reinforcement of water conservancy lakes, riverways and the like
The problem of noise of revetment reinforcing vibration equipment such as water conservancy lakes, riverways and the like is solved by adopting a silent hydraulic rotary power head and rotary drilling.
Secondly, as the hydraulic rotary power head is adopted to drill in a rotary manner in the construction process, slurry pollution is not caused.
(5) Method for solving several defects of high soil slope reinforcement by adopting twisted threaded steel pipe pile
The helical blades can form the large-diameter expansion head, so that sufficient bearing capacity can be provided, the bearing capacity is improved without grouting under the same condition, and the problem of increase of construction period and cost caused by grouting is solved.
This it is better that this it is stable high to bear recoverable wrong screw thread enlarged footing piling effect of twisting, the device is through the hold-in range and the thread bush 21 that set up, make the device can utilize the rotation of self to make steel-pipe pile body 20 can be to automatic water spray around, and can also utilize kicking block 31 to the inside clearance plug of through-hole 23, the functionality of device has been promoted, simultaneously can also utilize the inside resistance piece 6 of 4 pulling devices of traction steel cable on the device, make resistance piece 6 can dock first connecting cylinder 2 and second connecting cylinder 9, resistance piece 6 can contract automatically when the moment of torsion is too big, make first connecting cylinder 2 slip in the inside of second connecting cylinder 9, thereby make the device can protect the steel-pipe pile automatically and stall when meetting the stratum, the security when having promoted the use.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A stable high-bearing recoverable screwed expanded steel pile is characterized by comprising a screw thread expanded body, a hydraulic power head (1), a first connecting cylinder (2), an electric telescopic rod (3) and a traction steel rope (4), the front end of the hydraulic power head (1) is fixedly connected with a first connecting cylinder (2), an electric telescopic rod (3) is fixedly arranged inside the first connecting cylinder (2), traction steel ropes (4) are fixedly arranged on the left side and the right side of the front end of the electric telescopic rod (3), a guide wheel (5) is rotationally connected in the first connecting cylinder (2) on the surface of the traction steel rope (4), the left side and the right side of the interior of the first connecting cylinder (2) are both provided with an inner groove (7), a first spring (8) is fixedly arranged in the inner groove (7), and the front end of the first spring (8) and the front end of the traction steel rope (4) are fixedly connected with a resistance block (6); the utility model discloses a joint structure of steel pipe pile, including first connecting cylinder (2), the outside laminating of first connecting cylinder (2) is provided with second connecting cylinder (9), butt joint groove (10) that are used for placing resistance piece (6) are offered to the inside of second connecting cylinder (9), and the front end of second connecting cylinder (9) is fixed and is provided with connecting pipe (11), first half fixed mounting of connecting pipe (11) has otter board (13), and a bridging section of thick bamboo (12) is installed in the outside of connecting pipe (11), the left side fixedly connected with inlet tube (19) of a bridging section of thick bamboo (12), the outside of connecting pipe (11) front end is fixed and is provided with steel pipe pile body (20), and the surface threaded mounting of connecting pipe (11) front end has thread bush (21), the screw thread enlarged body sets up the outside at steel pipe pile body (20).
2. The stable high-load recoverable screw-threaded enlarged steel pile according to claim 1, wherein the outer wall of the first connecting cylinder (2) and the inner wall of the second connecting cylinder (9) are attached to each other, and the central axes of the first connecting cylinder (2), the second connecting cylinder (9) and the connecting pipe (11) are all on the same straight line.
3. The stable high-load recoverable screw-threaded enlarged steel pile according to claim 1, wherein the longitudinal section of the resistance block (6) is trapezoidal, the resistance blocks (6) are distributed at equal angles on the outer side of the first connecting cylinder (2), the resistance block (6) forms a sliding structure with the first connecting cylinder (2) through the inner groove (7) and the traction steel cable (4), and the resistance block (6) forms an elastic structure with the first connecting cylinder (2) through the first spring (8).
4. The stable high-load recoverable screw-threaded enlarged steel pile according to claim 1, wherein the second connecting cylinder (9) and the first connecting cylinder (2) form a clamping structure through a resistance block (6) and a butt groove (10), and the resistance block (6) and the butt groove (10) correspond to each other.
5. The stable high-load recoverable screw-threaded expanded steel pile according to claim 1, wherein the connection mode between the connection pipe (11) and the overlapping cylinder (12) is bearing connection, the middle of the mesh plate (13) is engaged with a first synchronous belt (14), the left side of the first synchronous belt (14) is engaged with a first connection shaft (15), the left side of the first connection shaft (15) is engaged with a second synchronous belt (16), and the left side of the second synchronous belt (16) is engaged with a second connection shaft (17).
6. The stable high-load recoverable screw-threaded enlarged steel pile according to claim 1, wherein a side connecting plate (18) is fixedly arranged around the second connecting shaft (17), the outer wall of the side connecting plate (18) is attached to the inner wall of the water inlet pipe (19), the water inlet pipe (19) forms a rotating structure with the connecting pipe (11) through the overlapping cylinder (12), and the first connecting shaft (15) forms a rotating structure with the water inlet pipe (19) through the first synchronous belt (14).
7. The stable high-load recoverable screw-threaded enlarged steel pile according to claim 1, characterized in that the connecting shaft (17) and the side connection plates (18) form a rotating structure with the water inlet pipe (19) through the first connecting shaft (15) and the second synchronous belt (16), and the side connection plates (18) are distributed on the surface of the connecting shaft (17) at equal angles.
8. The stable high load recoverable screw-threaded enlarged steel pile according to claim 1, the inner part of the thread bushing (21) is welded with a lapping plate (22), the surface of the lapping plate (22) starts to be provided with a through hole (23), the connecting pipe is characterized in that a movable groove (24) is formed in the connecting pipe (11), a sealing plate (25) is attached to the inner portion of the movable groove (24), a connecting plate (27) is fixedly connected to the right side of the sealing plate (25), the connecting plate (27) is connected with the connecting pipe (11) through a second spring (26), a third spring (28) is fixedly arranged in the connecting plate (27), a baffle (29) is fixedly connected to the front end of the third spring (28), a chamfer plane is arranged on the left side of the front end of the baffle (29), ejector blocks (31) are distributed on the left side of the connecting plate (27) at equal intervals, and the ejector blocks (31) correspond to the through holes (23) in a one-to-one mode.
9. The stable high-load recoverable screwed enlarged steel pile according to claim 1, wherein the right side of the bridging plate (22) is provided with push rods (32) at equal intervals, the oblique cut surfaces of the left sides of the front ends of two adjacent baffle plates (29) correspond to the push rods (32), the front ends of the push rods (32) are hemispheres, and the baffle plates (29) form a telescopic structure with the connecting plate (27) through the push rods (32) and the third springs (28).
10. The stable high load recoverable screw-threaded enlarged steel pile according to any of claims 1 to 9, wherein the screw thread is enlarged to a diameter in the range of 0.3 to 1.5 m.
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| KR20130128778A (en) * | 2012-05-18 | 2013-11-27 | (주)토탈지오이앤씨 | Grouting reinforced spiral steel pipe pile |
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| CN114032884B (en) | 2022-09-16 |
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