CN210459189U - Novel BNT carrier pile and construction equipment thereof - Google Patents
Novel BNT carrier pile and construction equipment thereof Download PDFInfo
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- CN210459189U CN210459189U CN201920785317.9U CN201920785317U CN210459189U CN 210459189 U CN210459189 U CN 210459189U CN 201920785317 U CN201920785317 U CN 201920785317U CN 210459189 U CN210459189 U CN 210459189U
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Abstract
The utility model relates to the field of civil engineering, in particular to a novel BNT carrier pile and construction equipment thereof, the novel BNT carrier pile comprises a pile body and a pile end carrier, the pile body is a concrete cylinder, the cross section of the pile body is circular, square or rectangular, and a reinforcement cage is arranged inside the pile body; the pile end carrier comprises a filler ramming entity and a compacted soil body; the reinforced soil layer is a natural bearing layer; the filling material ramming body is arranged in the natural bearing layer, the utility model fully explores the high-quality potential of the bearing capacity of the carrier pile and utilizes the advantages of high pile quality and strong applicability of the BNT (full casing) technology; the design and construction can be based by the diversification of construction forms and equipment and the requirement of three-stroke penetration as a criterion; the method is simple, optimizes the process, and finally realizes the BNT carrier pile with high bearing capacity, good effect, high speed, low cost and wider application range so as to meet different requirements of engineering construction on higher pile foundations.
Description
Technical Field
The utility model relates to a civil engineering field specifically is a novel BNT carrier pile and construction equipment thereof.
Background
When the bearing capacity of the natural foundation cannot meet the requirement, foundation treatment is required or a pile foundation is adopted, and how to improve the bearing capacity of a single pile by adopting the pile foundation becomes a general concern. The invention relates to a carrier pile which is invented on the basis of a rammed pile. However, the area of the pile end expanding head and the area of the pile end soil body affected by the concept and the process of the tamping-expanding pile are limited, so that the bearing capacity is improved to a limited extent. The carrier pile is a product combining a dynamic compaction replacement technology and tamping pile expansion construction in foundation treatment; the pile end bearing body which is more compact, has higher bearing capacity and is artificially reinforced is obtained by adding fillers into a pile end natural soil layer and tamping the fillers, and the load is transferred to a carrier through a pile body and is diffused to a bearing layer below the carrier, so that the improvement effect of the bearing capacity is more obvious.
The BNT pile is also called a full-casing cast-in-place pile, and is a French technology introduced in the last 70 th century. MZ series shaking type full casing pile driver, called 'pile driver' for short, was developed by Kunming engineering piling company in the end of 90 s. The advantages are that:
(1) the problem that the hole is easy to collapse due to the sand flowing in the stratum is solved, the quality problems caused by necking, mud clamping, pile breaking, segregation and the like are avoided, and the quality reliability of hole forming and pile forming is high;
(2) the construction method can be applied to construction under almost any geological conditions, and has wide adaptability;
(3) the soil condition can be checked at any time according to the soil sampling condition, so that the real conditions of a pile body soil layer and a pile end bearing layer can be conveniently researched and judged, the pile length can be reasonably selected, and the design is optimized;
(4) the full sleeve is used for forming the hole to form the pile, so that the size and the shape of the section of the pile are easy to control, the filling magnitude is small, and materials are saved;
(5) no slurry pollution, neat and civilized construction site and good environmental protection effect.
The prior art carrier piles and BNT piles and construction equipment have many problems to be perfected, which are mainly reflected in the following aspects:
1. the pile-forming concept has cognitive difference, and the development of high-quality potential is bound:
(1) in many documents and the JGJ135-2007 design rule for carrier piles, the carrier is a bearing body consisting of concrete, rammed filler and compacted soil; the reinforced soil layer where the pile end carrier is located above the natural bearing layer. If the natural bearing layer is used as the reinforced soil layer, the advantage of high bearing capacity and easy reinforcement of the natural bearing layer is utilized, and the bearing capacity improvement effect is more obvious after reinforcement and reinforcement;
(2) the pile body strength is required to be checked and calculated according to a formula of 4.3.3 in JGJ135-2007 Carrier pile design rules, and the pile body strength can meet the requirement of the formula of 4.3.3 in general engineering. However, in practice, the formula 4.3.3 cannot meet the actual requirement of higher bearing capacity of a single pile, and especially the safety of the small-diameter pile is challenged;
(3) concrete, commonly known as "expanded head", which is one of the carriers, does not specifically require the element conditions of size, dosage, strength, etc. in all the documents. In practice, when the three-stroke penetration degree meets the requirement of bearing capacity, the 'expanded head' part is redundant;
(4) in many documents and JGJ135-2007 Carrier pile design rules, for soil layers with good geological conditions and good soil squeezing effects, the soil body at the pile end can be directly tamped without adding fillers in the carrier construction. "without a definite definition of its element conditions;
(5) the three-strike penetration is a key index for determining the bearing capacity of the carrier, in order to improve the construction efficiency, a pile hammer is commonly used as power in engineering, an outer pipe is sunk into a set depth for description, and a standard pile hammer is still adopted during carrier construction. The practical pile hammer is used as power to carry out pipe sinking and tamping operation, and the hammering energy of the pile hammer and the hammering force of a standard pile hammer are equivalently replaced according to the requirement of three-stroke penetration degree of JGJ135-2007 carrier pile design regulation;
2. the application range is limited by various factors:
(1) geological conditions and process effects;
the standard column hammer is used for pore-forming construction, effective water-proof silt-blocking measures are not available, and when underground water level is high or confined water is encountered, the standard column hammer cannot be constructed due to water entering and mud entering of a pipe. Even when the standard column hammer is constructed on a wet and soft soil layer without underground water, the standard column hammer is very difficult to pull up under the double action of negative pressure and viscous force generated by pulling up the standard column hammer, particularly in saturated sandy soil, the phenomenon of water inflow or sand gushing in a pipe is very easy to cause if the standard column hammer is forced to pull up, so that the construction is difficult to continue, more seriously, the influence of factors such as a gap between the true diameter of the standard column hammer and the inner diameter of an outer pipe is caused, when the standard column hammer falls freely, the generated air resistance, water resistance, mud resistance and the like cause distortion of actual ramming force and are difficult to find, so that the bearing capacity is discrete, and the construction quality reliability is not high;
(2) partial soil layer potential cannot be fully utilized:
when no better natural bearing layer exists or the better natural bearing layer is buried deep and is not easy to use, a soil layer with relatively good bearing capacity is selected and is subjected to reinforcement treatment, and then the higher bearing capacity can be achieved, which is a great potential advantage of the carrier pile but is neglected;
3. the efficiency is influenced by the construction equipment factors:
(1) the construction of the carrier pile by using the standard column hammer has lower ramming frequency and lower construction efficiency, and the work efficiency is lower when meeting stratum conditions, and the utility model patent of 'construction equipment of a carrier pile' provides construction equipment, which utilizes double hammers (the column hammer and the vibration hammer) to carry out construction to improve the construction efficiency, but the double hammers are arranged up and down to occupy the effective height of a large part of pile frame, so that the actual pile length is limited, and the construction can only adapt to the construction of small pile diameter and short pile; because the requirement that the length of the inner pipe is greater than that of the outer pipe is met, the construction water-proof and silt-blocking measures are difficult to implement under the condition of high water level, and the pile-forming quality is difficult to control; in the double-hammer operation, the total mass and the height of the hammer form a challenge to the stability of the pile machine in the construction process, and the operation difficulty is increased, so that more technicians are required;
(2) the three-strike penetration is a key index for determining the bearing capacity of the carrier, when the pile hammer or the vibration hammer is used as power to construct the carrier pile, the actual striking penetration is different due to the fact that the models of the pile hammer or the vibration hammer are not uniform, but the requirements of the three-strike penetration are not easy to keep consistent, so that the design and construction are not dependent, and the construction quality is difficult to control;
(3) the special construction equipment has large investment amount, single function and limited equipment utilization rate, thereby causing investment waste.
Although the BNT pile has many advantages, the problems that the equipment cost is high and the equipment is large are difficult to overcome, and the BNT pile also becomes the biggest obstacle for popularization and application. The BNT pile uses a hydraulic device as power to reduce the side resistance between the steel sleeve and a soil layer through shaking or rotating, the steel sleeve is pressed in while shaking or rotating, and meanwhile, a grab bucket is used for digging and taking soil until the steel sleeve is sunk to a pile end holding layer, a reinforcement cage is placed, concrete is poured in, and then the steel sleeve is slowly pulled out according to a sinking mode. Thus: (1) the construction efficiency is low: the hole is formed by hydraulic shaking or rotating, and the pipe sinking and drawing speed is slow; the small soil taking amount of the flushing grab bucket each time is low in frequency; the pile machine is time-consuming and labor-consuming to take place and move. (2) Large cost, few pile diameter selectable specifications: the investment of equipment and steel sleeves in general construction units lacks economic strength, and complete sleeves with various diameter specifications are difficult to be prepared, so the pile diameter is limited to a certain extent; only the exclamation of the small pile diameter can be observed due to the limitation of the process and the equipment. (3) The equipment is huge: the construction needs a larger construction site, the distance from the boundary of the construction site to the center of the side pile also needs to be larger, and the construction site is difficult to maintain today with small dimension and gold.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel BNT carrier pile and construction equipment thereof fully excavates the high-quality latent energy that carrier pile bearing capacity is high and BNT technique becomes pile high quality, strong adaptability's advantage, bears the weight of the dynamic height, and the effect is good, fast, with low costs, and application scope is wider to this is the platform, synthesizes the bearing capacity and further obtains improving.
In order to solve the technical problems, the novel BNT carrier pile and the construction equipment thereof comprise a pile body and a pile end carrier, wherein the pile body is a concrete cylinder, the cross section of the pile body is circular, square or rectangular, and a reinforcement cage is arranged inside the pile body; the pile end carrier comprises a filler ramming entity and a compacted soil body; the reinforced soil layer is a natural bearing layer; the ramming body of the filling material is arranged in the natural bearing layer. The bearing capacity of the natural bearing layer serving as the bearing layer of the reinforced soil layer is increased from low to high, and the bearing capacity is increased from high to high; not only utilizes the advantage of high bearing capacity of the natural bearing layer, but also ensures that the reinforcement treatment is simple and easy, thereby obviously improving the bearing capacity and effectively improving the construction efficiency.
Furthermore, the filling material of the filling material ramming entity comprises broken stones, pebbles and cement mixture, and the cement mixture comprises anhydrous concrete, dry and hard concrete, concrete with the same strength as the pile body and concrete or concrete fragments scattered on a construction site. The filler variety is reasonably selected according to geological conditions to achieve the optimal compaction effect, so that the method is an important link which is not neglected and ensures half the effort, the materials are available, and the construction is convenient.
Further, when the bearing capacity characteristic value of the natural bearing layer is larger than or equal to 300Kpa, the pile end carrier is not provided with a filler tamping body, and the natural bearing layer is directly tamped and reinforced.
Furthermore, the pile body is an extruded and expanded pile, and the cross section of the pile body is multi-limb. The comprehensive bearing capacity of the BNT carrier pile after the pile body is subjected to squeezing and expanding treatment by using the squeezing and expanding device can be obviously improved in compressive resistance, horizontal resistance, pulling resistance and the like.
Furthermore, the pile body is an occlusive pile, the pile body and the pile body are transversely overlapped and occluded, and the pile distance between the pile bodies is smaller than the pile diameter of the pile body. In the deep pit support with shallow underground water, the secant pile can well play roles of supporting, waterproofing and impermeability, can also be used as a part of a permanent structure to have good effect, and is a better process for replacing an underground continuous wall; compared with the underground continuous wall, the construction method can greatly reduce the equipment investment and the engineering cost, and has the characteristics of high construction speed, good quality and environmental protection.
Furthermore, the construction equipment also comprises a pile frame system, a pile hammer, a hoisting system and a steel wire rope guide system, wherein the hoisting system is connected to the pile frame system, the steel wire rope guide system is connected between the hoisting system and the pile hammer, and the pile hammer moves up and down through the hoisting system; the method is characterized in that: the pile frame system comprises a working platform, the working platform is provided with a vertical rod and a pressurizing cantilever, the vertical rod is arranged at the front end of the working platform, the vertical rod is vertical to the working platform, and the pressurizing cantilever is arranged at the front end of the working platform; the working platform is also provided with two inclined supports, the inclined supports are arranged at the rear end of the working platform and are obliquely connected between the working platform and the upright rod, and the two inclined supports are respectively connected to two sides of the upright rod; the top end of the vertical rod is also provided with a top pulley, and the front end of the vertical rod is also provided with a slideway. The upright stanchion and the two inclined struts form a triangular stable structure,
further, the hoisting system comprises a pressurization hoist, a main hoist and a hopper hoist, the main hoist is arranged on the upper side of the working platform and is arranged behind the vertical rod, the main hoist comprises a main hoist A cylinder and a main hoist B cylinder, the main hoist A cylinder is arranged on the front side of the main hoist B cylinder, and the hopper hoist is arranged below the main hoist; the upper end of the pile hammer is connected with a cylinder A of the main winch through a steel wire rope, and the steel wire rope is connected to the pulley block in a sliding manner; the hopper hoist engine is also connected with a hopper, the hopper hoist engine is connected with the hopper through a steel wire rope, and the steel wire rope is connected to the top pulley block in a sliding mode.
Further, when the diameter of the pile body is less than or equal to 500mm, the length of the pile body is about 15M, and soil squeezing and hole forming construction is adopted due to the limitation of the height of a pile frame, the lower end of the pile hammer is further connected with a force transfer rod, the lower end of the force transfer rod is further connected with a tamping head, the force transfer rod and the tamping head are further connected in a sleeve in a sliding mode, the upper end of the sleeve is further connected with a steel wire rope, the steel wire rope is connected to a top pulley block in a sliding mode, and the steel wire rope is connected with a; the hopper winch is connected with a steel wire rope which is connected to the top pulley block in a sliding manner, and the steel wire rope is connected with a hopper; the upper end of the sleeve is provided with a filling port; the dowel bar is a steel cylinder, the total length of the dowel bar and the tamper head is 80-120 mm smaller than the length of the sleeve, the length-to-diameter ratio of the dowel bar to the tamper head is 55-65, the tamper head is a flat bottom, and the diameter ratio of the tamper head to the inner diameter of the sleeve is 20-40mm smaller.
The upper end of the pile hammer is connected with a steel wire rope of a cylinder A of the main winch, the steel wire rope suspends the pile hammer on a vertical rod through a pulley block at the top and is in sliding connection with the vertical rod through a slideway, the lower end of the steel wire rope is connected with a force transmission rod and then is connected with a tamping head, the force transmission rod and the tamping head are inserted into a sleeve, and the force transmission rod and the tamping head can move up and down in the sleeve along the slideway of the vertical rod under the action of the steel wire rope of the cylinder A of the main winch; the upper end of the sleeve is connected with a steel wire rope and is connected with a B cylinder of a main winch through a pulley block at the top of the vertical rod, and the dowel bar, the tamping head and the sleeve can respectively move up and down; the construction material is hoisted, a hopper or a hook is connected with a hopper steel wire rope, and the hopper or the hook is connected with a hopper winch through a top pulley block, so that the construction material can be vertically transported.
The dowel bar replaces a standard column hammer and has the advantages that: the problems of air resistance, mud resistance and water resistance generated during the construction of the standard column hammer are well solved; the length of the force transmission rod is shorter than that of the sleeve, a waterproof and siltation-resistant pipe plug can be formed when the force transmission rod synchronously sinks, and muddy water can be effectively prevented from entering the sleeve; the length of the sleeve is 80mm-120mm longer than that of the force transmission rod, if the thickness of the pipe plug formed by exceeding 120mm is too large, the filling material is difficult to knock out the sleeve, and if the thickness of the pipe plug is short and 80mm, the thickness of the pipe plug is small, so that the waterproof performance is not facilitated; the diameter of the tamping head of the dowel bar is 20-40mm smaller than the inner diameter of the sleeve, so that the tamping head of the dowel bar can be ensured to move up and down smoothly in the sleeve without causing overlarge gap; the ratio of the length to the diameter of the force transmission rod is preferably 55-65, the rigidity of the force transmission rod is mainly ensured under the action of hammering, if the ratio is more than 65, the deflection of the force transmission rod is increased under the action of hammering, so that the hammering force cannot be truly reflected at the pile end, and if the ratio is less than 55, the diameter of the sleeve is restricted; the force transmission rod is used for replacing a standard column hammer, so that the important measures of realizing diversification of construction methods and construction equipment, expanding the application range and ensuring the construction quality are achieved, and meanwhile, the important link for improving the construction efficiency is achieved.
In the construction equipment, the sleeve is round or rectangular or square, the upper end of the sleeve is provided with a material port, and construction materials can be fed through the material port at the upper end of the sleeve by connecting a steel wire rope of a hopper winch on the pile frame with the hopper. The material opening is a main channel for feeding fillers, placing a reinforcement cage and pouring concrete, and is also an important measure for simplifying the filling process and improving the work efficiency.
Further, when the diameter of the pile body is not less than 500mm, the length of the pile body is more than 15M, and soil taking pore-forming construction is adopted, the lower end of the pile hammer is connected with a sleeve chuck and a dowel bar chuck, a sleeve is clamped on the sleeve chuck, a dowel bar is clamped on the dowel bar chuck, and the lower end of the dowel bar is connected with a soil taking device; the cylinder B of the main winch is connected with a steel wire rope, the steel wire rope is also connected with a column hammer, and the steel wire rope is connected to a top pulley block in a sliding manner; the length of the soil sampler is 1.5M longer than that of the tamper head, and the cross section of the sleeve is circular, rectangular or square; the sleeve is provided with a plurality of sections, and the lower end of the first section of sleeve is in a sawtooth shape.
When the soil taking and hole forming construction is carried out, the connection of the upper end of the pile hammer is the same as that of the upper end of the pile hammer during the soil squeezing and hole forming construction, the lower end of the pile hammer is connected with the sleeve chuck and the dowel bar chuck, the sleeve chuck is firstly used for clamping the first section of sleeve and sinking into the soil according to requirements, then the sleeve chuck is loosened, if the length of the sleeve cannot meet the design requirements, the lower end of the second section of sleeve can be connected with the upper end of the first section of sleeve, and the upper end of the second section of sleeve is clamped by the sleeve chuck and continues sinking, so that the process is repeated until the design requirements. Replacing the dowel bar and clamping the dowel bar by using a dowel bar chuck, wherein the lower end of the dowel bar is connected with a special soil sampler, and when the length of the dowel bar cannot meet the construction requirement, the dowel bar can be lengthened according to a sleeve connection method to carry out soil sampling operation; when the standard or non-standard column hammer is used for implementing the filling material tamping, the upper end of the column hammer is connected with a steel wire rope of a cylinder B of a main winch, the steel wire rope is hung on a vertical rod through a top pulley block, and can be lifted upwards and fall freely under the action of the steel wire rope of the cylinder B of the main winch, and the loading and unloading of heavy or large objects with small radius can be realized; the vertical transportation connection mode of construction materials or small objects is the same as that of soil extrusion hole forming construction.
Furthermore, a walking crawler, a chassis and a slewing bearing are arranged below the working platform, the slewing bearing is connected to the lower side of the working platform, the chassis is connected between the walking crawler and the slewing bearing, and a slewing reducer is arranged on the side surface of the slewing bearing; the working platform is also provided with a plurality of hydraulic support legs; the working platform is also provided with a hydraulic oil pump, a distribution board and an operating platform. The walking pedrail, the chassis and the slewing bearing can lead the working platform to do slewing movement in all directions and 360 degrees.
The application of the pile hammer in pile foundation construction has already been very popular, and the construction efficiency can be obviously improved by using the pile hammer as a hydraulic device for swinging (or rotating) the power ratio of the immersed tube; the carrier construction is carried out by replacing a standard column hammer with a dowel bar, so that the construction is more convenient and quicker; the pile hammer is used as a pile-forming power and soil sampler mode and has a more obvious soil sampling effect than a grab bucket. The comprehensive effect of high pile-forming quality and high construction speed can be obtained.
The utility model relates to a novel BNT carrier pile and construction equipment thereof not only can make construction equipment and mode diversified and reach the purpose of becoming the stake high quality, bearing capacity is big, construction speed is fast, adaptable changeable geological conditions again, the application range of very big expansion, construction equipment commonality is good simultaneously, high-usage, the pile foundation construction that other construction power device of reloading can carry out different stake types and different technologies can satisfy various geological conditions and the more and more high demand of engineering construction.
The utility model has the advantages that:
1. the pile forming concept of the original carrier pile and the error area in the construction method are changed, and the high-quality potential of the bearing capacity is effectively excavated; the safety of the pile under the high-load condition is ensured; the requirement of the penetration degree of three-stroke is taken as a criterion, conditions are created for diversification of construction equipment and methods, and design and construction are made to be according;
2. the pile forming quality can be guaranteed; the problems that the original carrier body pile is not suitable for construction in a high water level and soft and wet soil layer and the applicability is limited due to the conditions of pile diameter, pile length and the like are solved; the method has the advantages that the method is simple to reproduce and store, and the process is optimized, so that the construction efficiency is effectively improved;
3. the pile body is squeezed and expanded, so that the comprehensive capabilities of the pile such as compression resistance, horizontal resistance, pulling resistance and the like are improved; provides material guarantee and technical support for the construction of the occlusive piles, and lays a foundation for meeting different requirements of various projects on pile foundations.
Drawings
Fig. 1 is a schematic structural view of the BNT carrier pile of the present invention;
fig. 2 is a schematic structural view of the novel pile body of the invention being an occlusive pile;
fig. 3 is a schematic structural view of the pile body of the present invention being an extruded and expanded pile;
fig. 4 is a cross-sectional view taken along line a-a of fig. 2 in accordance with the present invention;
FIG. 5 is a front view of a first embodiment of the construction apparatus of the present invention;
FIG. 6 is a left side view of a first embodiment of the construction equipment of the present invention;
FIG. 7 is a top view of a first embodiment of the construction apparatus of the present invention;
FIG. 8 is a front view of a second embodiment of the construction apparatus of the present invention;
fig. 9 is a left side view of the second embodiment of the construction equipment of the present invention.
In the figure: 1. walking is carried out; 2. a chassis; 3. a slewing bearing; 4. a slewing reducer; 5. a working platform; 6. a hydraulic leg; 7. a pressurized winch; 8. a main winch A drum; 9. a main winch B drum; 10. a hopper; 11. a hydraulic oil pump; 12. a switchboard; 13. a hopper winch; 14. an operation table; 15. a dowel bar; 16. a sleeve; 17. pressurizing the cantilever; 18. a pile hammer; 19. obliquely supporting; 20. erecting a rod; 21. a top pulley block; 22. tamping a head; 23. a filling opening; 24. a sleeve chuck; 25. a dowel bar clamp; 26. a column hammer; 27. a soil sampler; 28. a pile frame system; 29. a main hoist; 30. a hoisting system; 31. a wire rope guide system; 3501. a pile body; 3502. a pile end carrier; 3503. tamping a filling material into a solid body; 3504. compacting soil; 3505. reinforcing a soil layer; 3506; a natural strength layer.
Detailed Description
As shown in fig. 1, the novel BNT carrier pile of the present invention comprises a pile body 3501 and a pile end carrier 3502, wherein the pile body 3501 is a concrete column, the cross-sectional shape of the pile body 3501 is circular, square or rectangular, and a reinforcement cage is arranged inside the pile body 3501; the pile end carrier 3502 comprises a filler ramming body 3503 and a compacted soil body 3504; the reinforced soil layer 3505 is a natural bearing layer 3506; the stuffing ramming mass 3503 is arranged in the natural bearing layer 3506; the filling material of the filling material ramming entity 3503 comprises broken stones, pebbles and cement mixture, and the cement mixture comprises anhydrous concrete, dry hard concrete, concrete with the same strength as the pile body 3501, and concrete or concrete fragments scattered on a construction site. When the bearing capacity characteristic value of the natural bearing layer 3506 is not less than 300Kpa, the pile end carrier 3502 is not provided with the filler tamping entity 3503, and the natural bearing layer 3506 is directly tamped and reinforced.
As shown in fig. 3 and 4, the pile 3501 is an extruded pile, and the cross section of the pile 3501 is multi-limb.
As shown in fig. 2, the pile bodies 3501 are snap piles, the pile bodies 3501 and the pile bodies 3501 are transversely overlapped and snapped, and the pile distance between the pile bodies 3501 is smaller than the pile diameter of the pile bodies 3501.
As shown in fig. 5, 6, and 7, the utility model relates to a novel BNT carrier construction equipment is to pile 3501 diameter ≦ 500mm, pile 3501 length is around 15M, because of adopting the construction of crowded native pore-forming by its pile height restriction, and use the first structural sketch of embodiment of diesel pile hammer position power, as shown in the figure, the construction equipment still include pile frame system 28, pile hammer 18, hoist hoisting system 30 and wire rope guide system 31, hoist hoisting system 30 connects on pile frame system 28, pile frame system 28 realizes reciprocating through hoist hoisting system 30; the steel wire rope guide system 31 is connected between the hoisting system 30 and the pile hammer 18, and the pile hammer 18 moves up and down through the hoisting system 30; the method is characterized in that: the pile frame system 28 comprises a working platform 5, the working platform 5 is provided with an upright 20 and a pressurizing cantilever 17, the upright 20 is arranged at the front end of the working platform 5, the upright 20 is vertical to the working platform 5, and the pressurizing cantilever 17 is arranged at the front end of the working platform 5; the working platform 5 is also provided with two inclined supports 19, the inclined supports 19 are arranged at the rear end of the working platform 5, the inclined supports 19 are obliquely connected between the working platform 5 and the upright 20, the two inclined supports 19 are respectively connected to two sides of the upright 20, and the two inclined supports 19 and the upright 20 form a triangular stable structure; the top end of the upright rod 20 is also provided with a top pulley 21, and the front end of the upright rod 20 is also provided with a slideway. The hoisting and hoisting system 30 comprises a pressurizing hoisting machine 7, a main hoisting machine 29 and a hopper hoisting machine 13, wherein the main hoisting machine 29 is arranged on the upper side of the working platform 5, the main hoisting machine 29 is arranged behind the upright stanchion 20, the main hoisting machine 29 comprises a main hoisting machine A cylinder 8 and a main hoisting machine B cylinder 9, the main hoisting machine A cylinder 8 is arranged on the front side of the main hoisting machine B cylinder 9, and the hopper hoisting machine 13 is arranged below the main hoisting machine 29; the upper end of the pile hammer 18 is connected with the main winch A cylinder 8 through a steel wire rope, and the steel wire rope is connected to the top pulley block 21 in a sliding mode. The lower end of the pile hammer 18 is also connected with a dowel bar 15, the lower end of the dowel bar 15 is also connected with a tamping head 22, the dowel bar 15 and the tamping head 22 are also connected in a sleeve 16 in a sliding manner, the upper end of the sleeve 16 is also connected with a steel wire rope (marked in the attached drawing), the steel wire rope is connected on a top pulley block 21 in a sliding manner, and the steel wire rope is connected with a B cylinder 9 of a main winch; the hopper winch 13 is connected with a steel wire rope which is connected on the top pulley block 21 in a sliding way, and the steel wire rope is connected with a hopper 10; the upper end of the sleeve 16 is provided with a filling opening 23; the hopper 10 for vertical transportation of small articles or construction materials is connected with a steel wire rope, and then connected with the hopper winch 13 through the top pulley block 21, so that the vertical transportation of the construction materials can be realized.
The dowel bar 15 is a steel cylinder, the total length of the dowel bar 15 and the tamper head 22 is 80-120 mm smaller than that of the sleeve 16, the length-to-diameter ratio of the dowel bar 15 is 55-65, the tamper head 22 is a flat bottom, and the diameter of the tamper head 22 is 20-40mm smaller than the inner diameter of the sleeve 16. A walking crawler 1, a chassis 2 and a slewing bearing 3 are further arranged below the working platform 5, the slewing bearing 3 is connected to the lower side of the working platform 5, the chassis 2 is connected between the walking crawler 1 and the slewing bearing 3, and a slewing reducer 4 is further arranged on the side surface of the slewing bearing 3; the working platform 5 is also provided with a plurality of hydraulic support legs 6; the working platform 5 is also provided with a hydraulic oil pump 11, a distribution board 12 and an operation platform 14, and the walking 1, the chassis 2 and the slewing bearing 3 can make the working platform 5 perform slewing movement in all directions and 360 degrees.
Fig. 8 and 9 show that the utility model relates to a structural schematic diagram of embodiment two of the novel BNT carrier construction equipment, aiming at a pile body 3501 with a diameter ≧ 500mm, the length of the pile body 3501 is greater than 15M, soil sampling and pore forming are adopted, and a vibrating pile hammer is used as power, the difference from embodiment one is that the lower end of the pile hammer 18 is connected with a sleeve chuck 24 and a dowel bar chuck 25, a sleeve 16 is clamped on the sleeve chuck 24, a dowel bar 15 is clamped on the dowel bar chuck 25, and a soil sampler 27 is connected at the lower end of the dowel bar 15; the B cylinder of the main winch is connected with a steel wire rope, the steel wire rope is also connected with a column hammer 26, and the steel wire rope is connected to the top pulley block 21 in a sliding manner; the length of the soil sampler (27) is 1.5M longer than that of the tamper head (22), and the cross section of the sleeve (16) is circular, rectangular or square; the sleeve (16) is provided with a plurality of sections, and the lower end of the first section of sleeve (16) is in a sawtooth shape; during construction, a first section of sleeve 16 is clamped by a sleeve chuck 24, and is sunk into soil according to requirements, then the chuck is loosened, if the length of the sleeve cannot meet the design requirements, the lower end of a second section of sleeve 16 can be connected with the upper end of the first section of sleeve 16, the upper end of the second section of sleeve 16 is clamped by the sleeve chuck 24 to continue sinking, if the length of the sleeve cannot meet the design requirements, a dowel bar 15 is replaced and clamped by a dowel bar chuck 25, the lower end of the dowel bar 15 is connected with a soil sampler 27, and when the dowel bar 15 cannot meet the construction requirements, the dowel bar 15 can be lengthened according to the connection mode of the sleeve 16; the geological condition permits that the standard or non-standard column hammer 26 can be used for tamping the filling material, the upper end of the column hammer 26 is connected with the steel wire rope of the main winding machine B cylinder 9 and is hung on the vertical rod through the top pulley block 21, the vertical rod can be lifted upwards and fall freely under the action of the steel wire rope of the main winding machine B cylinder 9, and the loading and unloading of heavy and large objects with small radius can be realized.
In 2017, different carrier pile structures are adopted under the same conditions of geology, pile diameter and pile length, different results are obtained, the carrier pile in the prior art and the novel BNT carrier pile have the bearing capacity characteristic values of 1100KN and 2000KN respectively through detection tests, the construction efficiency of the carrier pile is multiple times that of the novel BNT carrier pile, the effect is obvious, in a certain residential area project in 6 months in 2018, due to the fact that the better natural bearing layer 3506 is deeply buried, the powder clay with the buried depth of about 13 meters is selected as the natural bearing layer 3506 due to the manufacturing cost, the bearing capacity characteristic value is only 110KPa, the pile diameter is Ø 450 mm, the pile length is 13.5-14M, and after the natural bearing layer 3506 is reinforced, the vertical bearing capacity characteristic value of a single pile is Ra =1750KN through detection.
The utility model relates to a novel BNT carrier pile and construction equipment thereof not only can make construction equipment and mode diversified and reach the purpose of becoming the stake high quality, bearing capacity is big, construction speed is fast, adaptable changeable geological conditions again, the application range of very big expansion, construction equipment commonality is good simultaneously, high-usage, the pile foundation construction that other construction power device of reloading can carry out different stake types and different technologies can satisfy various geological conditions and the more and more high demand of engineering construction.
Claims (9)
1. The utility model provides a novel BNT carrier pile which characterized in that: the pile comprises a pile body (3501) and a pile end carrier (3502), wherein the pile body (3501) is a concrete column, the cross section of the pile body (3501) is round, square or rectangular, and a reinforcement cage is arranged in the pile body (3501); the pile end carrier (3502) comprises a filler ramming entity (3503) and a compacted soil body (3504); the reinforced soil layer (3505) is a natural bearing layer (3506); the ramming mass of the filling material (3503) is arranged in the natural bearing layer (3506).
2. The novel BNT carrier pile according to claim 1, wherein: when the bearing capacity characteristic value of the natural bearing layer (3506) is not less than or equal to 300Kpa, the pile end carrier (3502) is not provided with the filler tamping body (3503), and the natural bearing layer (3506) is directly tamped and reinforced.
3. The novel BNT carrier pile according to claim 1, wherein: the pile body (3501) is an extruded and expanded pile, and the cross section of the pile body (3501) is multi-limb.
4. The novel BNT carrier pile according to claim 1, wherein: the pile body (3501) is an engaged pile, the pile body (3501) and the pile body (3501) are transversely overlapped and engaged, and the pile distance between the pile bodies (3501) is smaller than the pile diameter of the pile body (3501).
5. A novel BNT carrier pile construction device comprises a pile frame system (28), a pile hammer (18), a hoisting system (30) and a steel wire rope guide system (31), wherein the hoisting system (30) is connected to the pile frame system (28), the steel wire rope guide system (31) is connected between the hoisting system (30) and the pile hammer (18), and the pile hammer (18) moves up and down through the hoisting system (30); the method is characterized in that: the pile frame system (28) comprises a working platform (5), wherein the working platform (5) is provided with an upright rod (20) and a pressurizing cantilever (17), the upright rod (20) is arranged at the front end of the working platform (5), the upright rod (20) is vertical to the working platform (5), and the pressurizing cantilever (17) is arranged at the front end of the working platform (5); the working platform (5) is also provided with inclined supports (19), the inclined supports (19) are arranged at the rear end of the working platform (5), the inclined supports (19) are obliquely connected between the working platform (5) and the upright stanchion (20), the number of the inclined supports (19) is two, and the two inclined supports (19) are respectively connected to two sides of the upright stanchion (20); the top end of the upright rod (20) is also provided with a top pulley block (21), and the front end of the upright rod (20) is also provided with a slideway.
6. The construction equipment of the BNT carrier pile according to claim 5, wherein: the hoisting and hoisting system (30) comprises a pressurization hoist (7), a main hoist (29) and a hopper hoist (13), wherein the main hoist (29) is arranged on the upper side of the working platform (5), the main hoist (29) is arranged behind the vertical rod (20), the main hoist (29) comprises a main hoist A cylinder (8) and a main hoist B cylinder (9), the main hoist A cylinder (8) is arranged on the front side of the main hoist B cylinder (9), and the hopper hoist (13) is arranged below the main hoist (29); the upper end of the pile hammer (18) is connected with a main winch A cylinder (8) through a steel wire rope, and the steel wire rope is connected to a top pulley block (21) in a sliding manner; the hopper winch (13) is also connected with a hopper (10), the hopper winch (13) is connected with the hopper (10) through a steel wire rope, and the steel wire rope is connected to the top pulley block (21) in a sliding mode.
7. The construction equipment of the BNT carrier pile according to claim 6, wherein: the lower end of the pile hammer (18) is further connected with a force transmission rod (15), the lower end of the force transmission rod (15) is further connected with a tamping head (22), the force transmission rod (15) and the tamping head (22) are further connected in a sleeve (16) in a sliding mode, the upper end of the sleeve (16) is further connected with a steel wire rope, the steel wire rope is connected to a top pulley block (21) in a sliding mode, and the steel wire rope is connected with a B cylinder (9) of a main winch; the hopper winch (13) is connected with a steel wire rope which is connected to the top pulley block (21) in a sliding manner, and the steel wire rope is connected with a hopper (10); the upper end of the sleeve (16) is provided with a filling opening (23); the dowel bar (15) is a steel cylinder, the total length of the dowel bar (15) and the tamping head (22) is 80-120 mm smaller than the length of the sleeve (16), the ratio of the length to the diameter of the dowel bar (15) is 55-65, the tamping head (22) is a flat bottom, and the diameter of the tamping head (22) is 20-40mm smaller than the inner diameter of the sleeve (16).
8. The construction equipment of the BNT carrier pile according to claim 6, wherein: the lower end of the pile hammer (18) is connected with a sleeve chuck (24) and a dowel bar chuck (25), a sleeve (16) is clamped on the sleeve chuck (24), a dowel bar (15) is clamped on the dowel bar chuck (25), and the lower end of the dowel bar (15) is connected with a soil sampler (27); the B cylinder of the main winch is connected with a steel wire rope, the steel wire rope is also connected with a column hammer (26), and the steel wire rope is connected to a top pulley block (21) in a sliding manner; the length of the soil sampler (27) is 1.5M longer than that of the tamper head (22), and the cross section of the sleeve (16) is circular, rectangular or square; the casing (16) is provided with a plurality of sections, and the lower end of the first section of casing (16) is in a sawtooth shape.
9. The construction equipment of the BNT carrier pile according to claim 5, wherein: a walking crawler (1), a chassis (2) and a slewing bearing (3) are further arranged below the working platform (5), the slewing bearing (3) is connected to the lower side of the working platform (5), the chassis (2) is connected between the walking crawler (1) and the slewing bearing (3), and a slewing reducer (4) is further arranged on the side surface of the slewing bearing (3); the working platform (5) is also provided with a plurality of hydraulic support legs (6), and the hydraulic support legs (6) are arranged; the working platform (5) is also provided with a hydraulic oil pump (11), a distribution board (12) and an operation table (14).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113174925A (en) * | 2021-04-12 | 2021-07-27 | 三峡大学 | Novel coral sand foundation pile using expanding agent and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174925A (en) * | 2021-04-12 | 2021-07-27 | 三峡大学 | Novel coral sand foundation pile using expanding agent and construction method |
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