CN210421089U - Middle-arranged inclined pile pressing machine for supporting single-row construction of support-free prefabricated inclined piles of foundation pit - Google Patents
Middle-arranged inclined pile pressing machine for supporting single-row construction of support-free prefabricated inclined piles of foundation pit Download PDFInfo
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- CN210421089U CN210421089U CN201920962724.2U CN201920962724U CN210421089U CN 210421089 U CN210421089 U CN 210421089U CN 201920962724 U CN201920962724 U CN 201920962724U CN 210421089 U CN210421089 U CN 210421089U
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Abstract
The utility model discloses a middle-arranged inclined pile pressing machine for supporting single-row construction of a foundation pit support-free prefabricated inclined pile, which comprises a supporting platform assembly, a crane assembly and a middle-arranged portal frame assembly; the length direction of the supporting platform assembly is vertical to the operation surface, namely the arrangement direction of the piles; the variable-amplitude portal frame assembly is arranged at the geometric center of the supporting platform assembly, and is provided with a pile pressing oil cylinder and is also connected with a pile clamping device assembly arranged on the portal frame assembly; the amplitude-variable portal frame assembly and the pile clamping device assembly swing back and forth in a direction perpendicular to a construction working surface within an inclination angle range of +/-30 degrees so as to adjust pile pressing angles of an inclined pile and a straight pile in the support pile; the long ship assembly and the short ship assembly on the supporting platform assembly are matched to complete pile pressing construction of one or more groups of supporting piles on one machine position. The pile pressing construction efficiency, the overall stability and the pile driving precision are improved.
Description
Technical Field
The utility model relates to a hydraulic pressure pile driver technical field, in particular to single row construction is strutted with putting formula batter pile driver in foundation ditch unsupported precast batter pile.
Background
The measures of soil retaining structure, underground water control, environmental protection and the like required for ensuring the safety and stability of the underground space formed by downward excavation of the ground during the construction of the underground structure are called foundation pit engineering. The foundation pit support is defined by the national industry standard of people's republic of China ' technical Specification for building foundation pit support ' JGJ120-2012 as follows: in order to protect the safety of the construction of the underground main body structure and the surrounding environment of the foundation pit, the foundation pit adopts the measures of temporary retaining, reinforcing, protecting and underground water controlling.
The foundation pit engineering is a system engineering integrating geological engineering, geotechnical engineering, structural engineering and geotechnical testing technology. The main content is as follows: engineering investigation, supporting structure design and construction, earth excavation and backfilling, underground water control, information construction, surrounding environment protection and the like. The simplest and most economical method for foundation pit construction is slope excavation, but the method is often limited by site conditions and the surrounding environment, so that a supporting system needs to be designed to ensure the smooth construction and better protect the surrounding environment.
Whether a supporting structure is adopted for foundation pit excavation or not, which supporting structure is adopted, is determined by comprehensive analysis and comparison of economy, technology and environment according to the surrounding environment of the foundation pit, the condition of an underground structure, the excavation depth of the foundation pit, the engineering geological and hydrogeological conditions, the construction season, the regional engineering experience and the like.
The foundation pit supporting structure system generally comprises two parts, namely a soil retaining structure and a precipitation and water stopping system. Pile and wall type supporting structures often adopt steel sheet piles, reinforced concrete sheet piles, column-column type cast-in-place piles, underground continuous walls and the like. According to the soil condition and the size of the foundation pit, the foundation pit can be designed to be cantilever type, inner support type or anchor type. The gravity type supporting structure mostly adopts a cement soil mixing pile retaining wall, a soil nailing wall and the like. When the supporting structure can not play the role of water stop, a water stop curtain can be arranged or precipitation outside the pit is adopted at the same time so as to achieve the purpose of controlling underground water, so that the foundation pit earthwork engineering can be excavated under the dry operation condition.
In the prior art, a Chinese patent with the patent number of 201811411544.1 discloses an active inclined single-row pile foundation pit supporting method, which comprises the following steps: 1) driving support piles inclined towards the inside of the pit along the inner side of the edge of the foundation pit to a designed elevation of the pile bottom to form a single row of support piles, and meanwhile, arranging a waterproof curtain behind the single row of support piles; 2) arranging a jack on the pile top of each support pile; 3) arranging crown beams on the single row of support piles, and connecting all the support piles into a whole by adopting the crown beams; 4) excavating the soil body surrounded by the single-row supporting piles to the designed elevation of the pit bottom, and applying a controlled expansion force to the supporting piles by adopting the jacks arranged in the step 2) in the excavating process or before excavating so as to reduce the displacement of the soil body and the pile tops. According to the active inclined single-row pile foundation pit supporting method, the jack is used for actively controlling the displacement of the inclined single-row pile, the pile top displacement can be reduced to a great extent under the condition that the excavation depths are the same, the ground deformation behind the pile is greatly reduced, the damage to the surrounding environment is avoided, the pile body bending moment can be reduced, the design strength of the pile body is reduced, and the construction cost is reduced; when the pile length and the pile design strength are the same as those of a common row pile, the excavation depth can be increased, and the method has better technical value; the excavation surface is inclined, so that the possibility of overturning damage of the foundation pit is greatly reduced, and the safety significance to foundation pit engineering is great; the design requirement can be met only by using the cantilever pile support, so that the design and construction are simpler and more convenient, the material is saved, and the engineering cost is reduced.
However, the above-mentioned techniques still have certain defects, the number of the support piles to be constructed in the foundation pit construction site is large, and the existing pile pressing construction equipment needs to frequently move the machine, which easily causes that the construction process of driving each support pile into the designed elevation of the pile bottom by the construction equipment in the foundation pit construction site consumes too long construction time, and increases the construction period; the pile driving position and angle control precision of each support pile is not high, a jack is required to be additionally arranged to control the displacement of a pile body, the monitoring difficulty is high, the deviation of the support pile caused by the displacement of a soil body and a pile top is easy to occur, and the method is particularly not suitable for the construction of unsupported multistage support and cross inclined pile arrangement of a large building foundation pit with strong continuity, high construction strength and short construction period.
Referring to the attached drawing 1, the chinese invention patent application cn201711200885.x filed by the applicant of the present invention discloses a variable amplitude hydraulic pile pressing device, which comprises a pile pressing oil cylinder, a portal frame and a pile clamping device, wherein a cylinder barrel of the pile pressing oil cylinder is fixed on the portal frame, a radial telescopic pile clamping structure is arranged in the pile clamping device, and two opposite side surfaces of the pile clamping device are respectively provided with a guide part to be movably connected with a guide support at the inner side of the portal frame; the bottom of the portal frame is provided with a rotating base, the upper end of the rotating base is connected with the portal frame through a pin shaft A or a bolting mode, and the lower end of the rotating base is movably connected with the supporting platform through a pin shaft B to form a rotating structure; a luffing oil cylinder is arranged on the supporting platform, the cylinder body of the luffing oil cylinder is fixedly connected to the supporting platform, and the piston rod of the luffing oil cylinder is connected with the upper part of the portal frame to form a luffing type rotating structure for driving the portal frame to rotate around a pin B; the portal frame rotates around the pin shaft B back and forth to drive the pile pressing oil cylinder and the pile clamping device to swing back and forth, so that the inclined pile hydraulic pile pressing structure is formed. The construction method has the characteristics of convenience in construction, high construction efficiency, small environmental pollution, simple structure and the like.
In practical application, particularly in the process of multi-stage supporting construction operation of single-row piles and single-row piles, the applicant finds that the variable-amplitude hydraulic pile pressing device has the following defects:
1. because the portal frame and the pile clamping device are arranged at the front part of the supporting platform, the space for arranging the cylinder body of the variable-amplitude oil cylinder and the piston rod thereof on the supporting platform is limited, the variable-amplitude range of only one-stage oil cylinder is only +/-15 degrees, the stroke is short, the large inclination angle and the long stroke inclination of 20 degrees or more are difficult to realize, the application range is limited, and the pile pressing device is only suitable for pile pressing operation of the prefabricated support pile with small variable-amplitude inclination angle and short stroke; 2. because the portal frame and the pile clamping device are arranged at the front part of the supporting platform (namely, the side facing away from the crane and facing to the working surface), the gravity center of the whole pile pressing machine is also positioned at the front part of the supporting platform in a non-pile pressing working state, and the whole balance (the balance of the whole machine in a dynamic state) is not easy to control in the process of moving or shifting, so that the speed of moving or shifting is influenced; 3. because the integral gravity center of the pile press is also positioned at the front part of the supporting platform, the front part and the rear part of the supporting platform are stressed unevenly under the working state of pile press, and the front part is easy to cause local sinking under heavy pressure, thus influencing the integral stability and the piling precision of equipment; 4. in the process of carrying out multi-stage supporting construction operation such as vertical and inclined combined single-row supporting piles, inclined and inclined combined single-row supporting piles and the like under the condition that a foundation pit is not supported, the direction design of a supporting platform and a portal frame assembly is unreasonable, after pile pressing operation of each supporting pile is completed, machine moving operation is needed to carry out operation on the next supporting pile, the time consumption of machine moving is long, the energy consumption is high, the construction speed is low, the precision of the pressed-in inclination angle and the pressed-in position of a pile body is low, and the construction efficiency and the construction cost are influenced. Particularly, in large-scale engineering construction, the construction efficiency of pile pressing operation for multi-stage support piles is lower, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a middle-arranged inclined pile press machine for supporting single-row construction of a support-free precast inclined pile of a foundation pit, aiming at the construction characteristics of the pile row of the support-free foundation pit, redesigning a portal frame assembly, so that the inclination angle and the stroke can be increased, pile pressing operation can be carried out according to each group of supporting piles, and only displacement is needed in the operation process of each group of supporting piles without moving the machine; after the machine position of a working face is deployed, the construction of a group of supporting piles can be completed only by moving, moving left and right on the machine position through a long ship assembly, the machine position moving operation amount is small, the shifting speed is high, the pile pressing efficiency of the unsupported row piles is high, the pile body positioning precision is high, the follow-up displacement and deformation of the pile body are small, the construction time and energy are saved, and the construction safety is improved.
In order to achieve the above object, the utility model adopts the following technical scheme:
a middle-arranged inclined pile press-in machine for single-row construction of a support-free precast support pile of a foundation pit comprises a support platform assembly, a crane assembly and a middle-arranged portal frame assembly, wherein the crane assembly and the middle-arranged portal frame assembly are arranged on the support platform assembly; the length direction of the supporting platform assembly is vertical to the operation surface, namely the arrangement direction of the piles; the supporting platform assembly comprises a long ship assembly and a short ship assembly which are arranged in a crossed manner with the axial lead of the supporting platform assembly in the length direction; the supporting platform assembly is provided with a luffing portal frame assembly, the portal frame assembly is arranged at the geometric center of the supporting platform assembly, and the portal frame assembly is provided with a pile pressing oil cylinder and is also connected with a pile clamping device assembly arranged on the portal frame assembly; the amplitude-variable portal frame assembly and the pile clamping device assembly swing back and forth in a direction perpendicular to a construction working surface within an inclination angle range of +/-30 degrees so as to adjust pile pressing angles of an inclined pile and a straight pile in the support pile; the portal frame assembly completes pile pressing construction of one or more groups of support piles on one machine position through the matching action of the rotating shaft and the variable amplitude oil cylinder on the outer side of the portal frame assembly and the long ship assembly and the short ship assembly on the supporting platform assembly.
As a further improvement of the utility model, an angle monitoring system is further arranged on the portal frame assembly, the angle monitoring system is electrically connected with a control processor of the central inclined pile pressing machine, when the central inclined pile pressing machine is started, the angle monitoring system is simultaneously started, and the angle monitoring system continuously monitors the pile pressing angle and the pile pressing path of the support pile; when monitoring that the pile pressing angle or the pile pressing path of the support pile deviates, the system immediately sends out an audible and visual alarm signal, and when exceeding the angle deviation allowable range, the central inclined pile pressing machine is immediately closed to stop pressing the pile and an alarm signal is sent to the control processor; the angle monitoring system generates an alarm signal to the control processor, and simultaneously drives the luffing cylinder on the portal frame assembly to adjust the portal frame assembly to return to a preset pile pressing construction angle and a construction path through the control processor; when the angle monitoring system detects that the supporting pile returns to the preset pile pressing angle and pile pressing path again, the control processor restarts the amplitude-variable hydraulic pile pressing oil cylinder to press the pile while stopping sending the alarm signal, and returns to the monitoring state.
As a further improvement of the utility model, a pile pressing oil cylinder for static pile pressing is arranged on the central portal frame assembly, and the pile pressing oil cylinder is connected with the top end of a pile clamping device assembly arranged on the portal frame assembly through a piston rod and a pin shaft; the pile pressing oil cylinder comprises two main pressure oil cylinders and two auxiliary pressure oil cylinders, the cylinder barrels of the main pressure oil cylinders and the auxiliary pressure oil cylinders are fixed at the upper end of the portal frame assembly, and the auxiliary pressure oil cylinders form an auxiliary pressurization structure and are used in large tonnage.
As a further improvement, the supporting platform assembly is also provided with a control processor, the portal frame assembly is provided with an angle monitoring system, and the control processor is electrically connected with the angle monitoring system.
As a further improvement, be provided with on the portal frame assembly with pile pressing hydro-cylinder assorted pile pressing hydro-cylinder fixing base, the pile pressing hydro-cylinder sets up to be connected with pile holder assembly through piston rod and round pin axle behind this pile pressing hydro-cylinder fixing base.
As the utility model discloses a further improvement is provided with radial telescopic pile gripper structure in the pile gripper assembly, and the relative both sides face of pile gripper assembly respectively is provided with the guide, guide and the inboard direction support swing joint of portal frame assembly.
Compared with the prior art have the advantages that:
1. the utility model discloses a middle-mounted inclined pile press pile machine for supporting single-row construction of a foundation pit supportless prefabricated inclined pile, aiming at the construction characteristics of pile arrangement of a supportless foundation pit, redesigning a portal frame assembly, providing a complete design method of an inclined supporting pile, and researching and developing a middle-mounted inclined pile press pile machine (inclined piles of +/-20 degrees can be constructed in the prior art) of special static pile press equipment for constructing inclined piles of +/-30 degrees; the length direction of a support plate of the equipment is vertical to the working surface, the long ship assembly is controlled to move left and right, the short ship assembly is controlled to move front and back, and the pile clamping device swings in the front and back directions. After the long ship assembly is deployed to a working position of a working face, construction of each group of support piles of the working position can be completed only by operating the long ship assembly and moving the long ship assembly left and right, and the long ship assembly moving device is high in moving speed, high in piling efficiency and high in precision.
2. The utility model provides a well put formula batter pile driver, because its portal frame and pile holder set up in supporting platform's middle part, the space that its jar body that becomes the width of cloth hydro-cylinder and its piston rod set up on supporting platform obtains great extension, is equipped with the second grade hydro-cylinder, make its change width of cloth scope enlarge to at + -30 °, the stroke is also synchronous to be increased, can realize the slope of + -20 and above big inclination and long stroke, its application scope has been extended, be suitable for to become the width of cloth inclination big, the longer prefabricated pile pressing operation of fender pile of stroke.
3. Because the portal frame and the pile clamping device are arranged in the middle of the supporting platform (i.e. the geometrical center position facing away from the crane and facing the working surface), the gravity center of the whole pile pressing machine in the non-pile pressing working state is positioned in the middle of the supporting platform, and the whole balance (balance of the whole machine in a dynamic state) is easily controlled in the process of moving or shifting the machine, so that the speed of moving or shifting the machine is increased, and the safety of construction is improved.
4. Because the whole gravity center of the pile pressing machine is also positioned in the middle of the supporting platform, the front part and the rear part of the supporting platform are uniformly stressed in the pile pressing working state, the phenomenon that the front part of the pile pressing machine sinks locally under heavy pressure, the whole stability of equipment and the pile driving precision are not influenced is avoided, and the construction safety is also improved.
5. In the process of carrying out multi-stage supporting construction operation such as vertical and inclined combined single-row supporting piles, inclined and inclined combined single-row supporting piles and the like under the condition that a foundation pit is not supported, the direction design of a supporting platform and a portal frame assembly is reasonable, and the defects that the time consumption is long, the energy consumption is high, the construction speed is low, the precision of an inclined angle and a position for pressing in a pile body is low and the construction efficiency and the cost are influenced when the operation of moving a machine is required after the pile pressing operation of each supporting pile is completed are overcome, one group or multiple groups of supporting pile pressing operations can be completed on each station, and then the operation of moving the machine is required. Particularly, in large-scale engineering construction, the construction efficiency of pile pressing operation for multi-stage support piles is higher, and the cost is lower.
6. The utility model discloses a middle-arranged inclined pile pressing machine for supporting single-row construction of a support-free prefabricated inclined pile of a foundation pit can realize single-row supporting pile construction in modes of vertical and inclined combined single-row supporting piles, inclined and inclined combined single-row supporting piles and the like through a middle-arranged portal frame assembly, and can realize non-horizontal support construction within a depth range of 5m-10 m; the method can be applied to earth excavation in the foundation pit without the horizontal support and construction of the underground structure of the building, can save the construction period of construction and dismantling without the horizontal support in the prior construction technology, and can obviously shorten the construction period.
7. The utility model discloses the single row construction of supporting prefabricated batter pile is strutted with well-placed batter pile pressure stake machine to the foundation ditch unsupported prefabricated batter pile, adopts prefabricated fender pile to carry out the single row construction of supporting prefabricated batter pile of foundation ditch, can realize adopting the industrialization construction of prefabricated fender pile; underground pipe gallery can adopt prefabricated pipe gallery to assemble in the no horizontal support foundation ditch, realizes underground pipe gallery's industrialization and builds.
To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic overall appearance structure diagram of a variable amplitude type hydraulic pile pressing device in the prior art;
FIG. 2 is a schematic construction view of a single row of support piles of the first inclined pile;
FIG. 3 is a schematic construction view of a second single row of inclined piles;
FIG. 4 is a schematic construction view of a third single row of inclined piles;
FIG. 5 is a schematic view of the overall configuration of the central inclined pile driver of the present invention;
FIG. 6 is a schematic top view of the structure of FIG. 5;
FIG. 7 is a schematic structural view of the assembly of FIG. 5;
fig. 8 is an assembly structure diagram of a gantry assembly part in fig. 5.
In the figure: 1. a support platform assembly; 2. a pony boat assembly; 3. a gantry assembly; 4. a pile pressing oil cylinder; 5. A pile gripper assembly; 6. a crane assembly; 7. a long boat assembly; 8. a main pressure oil cylinder; 9. an auxiliary pressure oil cylinder; 10. A pile pressing oil cylinder fixing seat; A. supporting piles; a1, outer inclined piles; a2, a vertical pile; a3, inner inclined piles; B. foundation (soil); C. a foundation pit; D. a pipe gallery.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
referring to the attached drawings 2-8, in the engineering construction such as the construction of an urban pipe gallery, the embodiment provides a middle-arranged inclined pile pressing machine and a construction method for supporting single-row construction of a support-free prefabricated inclined pile of a foundation pit, and the concrete construction requirements are that a foundation pit C with the length of 2 kilometers and the depth of 8-10 meters is excavated on a soft foundation soil body foundation B so as to lay a prefabricated urban comprehensive pipe gallery D; constructing by adopting a non-support prefabricated inclined pile support single-row construction method, a middle-arranged inclined pile press machine and a prefabricated support cement pile, wherein each group of the non-support prefabricated inclined pile support single-row piles of partial construction sections comprises 2 support piles A which are respectively a first outer inclined pile A1+ a straight pile A2 or a second outer inclined pile A1+ an inner inclined pile A2; each group of the unsupported precast inclined pile supporting single-row piles of the partial construction section comprises 3 supporting piles A, and the third type is respectively an outer inclined pile A1+ a straight pile A2+ an inner inclined pile A3.
A middle-arranged inclined pile press for single-row construction of supporting of a supporting-free prefabricated inclined pile of a foundation pit comprises a supporting platform assembly 1, a crane assembly 6 and a middle-arranged portal frame assembly 3, wherein the crane assembly 6 and the middle-arranged portal frame assembly are arranged on the supporting platform assembly 1; the length direction of the supporting platform assembly 1 is vertical to the operation surface, namely the arrangement direction of the piles; the supporting platform assembly 1 comprises a long ship assembly 7 and a short ship assembly 2 which are arranged in a cross mode with the axial lead in the length direction; the supporting platform assembly 1 is provided with a luffing portal frame assembly 3, the portal frame assembly 3 is arranged at the geometric center of the supporting platform assembly, and the portal frame assembly 3 is provided with a pile pressing oil cylinder 4 and is also connected with a pile clamping device assembly 5 arranged on the portal frame assembly 3; the amplitude-variable portal frame 3 assembly and the pile clamping device assembly 5 swing back and forth in a direction perpendicular to a construction working surface within an inclination angle range of +/-30 degrees so as to adjust pile pressing angles of inclined piles and straight piles in the support piles; the portal frame assembly 3 completes pile pressing construction of one or more groups of support piles on one machine position through the matching action of a rotating shaft and a variable amplitude oil cylinder on the outer side of the portal frame assembly and a long ship assembly 7 and a short ship assembly 2 on the supporting platform assembly 1.
In the middle-positioned inclined pile pressing machine in the embodiment, a pile pressing oil cylinder 4 for static pile pressing is arranged on the middle-positioned portal frame assembly 3, and the pile pressing oil cylinder 4 is connected with the top end of a pile clamping device assembly 5 arranged on the portal frame assembly 3 through a piston rod and a pin shaft; the pile pressing oil cylinder 4 comprises two main oil cylinders 8 and two auxiliary oil cylinders 9, the cylinder barrels of the main oil cylinders 8 and the auxiliary oil cylinders 9 are fixed at the upper end of the portal frame assembly 3, and the auxiliary oil cylinders 9 form an auxiliary pressurizing structure and are used in large tonnage.
In the middle-positioned inclined pile pressing machine in this embodiment, the support platform assembly 1 is further provided with a control processor, the portal frame assembly 3 is provided with an angle monitoring system, and the control processor is electrically connected with the angle monitoring system.
In the central inclined pile driver in this embodiment, a pile pressing cylinder fixing seat 10 matched with the pile pressing cylinder 4 is provided on the gantry assembly 3, and the pile pressing cylinder 10 is arranged behind the pile pressing cylinder fixing seat 10 and connected with the pile gripper assembly 5 through a piston rod and a pin shaft.
In the central inclined pile pressing machine in this embodiment, the pile gripper assembly 5 is provided with a radial telescopic pile gripping structure, two opposite side surfaces of the pile gripper assembly 5 are respectively provided with a guide member, and the guide members are movably connected with the guide support at the inner side of the portal frame assembly 3.
The middle-arranged inclined pile pressing machine for supporting single-row construction of the support-free prefabricated inclined pile of the foundation pit is characterized in that an angle monitoring system is further arranged on a portal frame assembly 3 of the middle-arranged inclined pile pressing machine, the angle monitoring system is electrically connected with a control processor of the middle-arranged inclined pile pressing machine, the angle monitoring system is started when the middle-arranged inclined pile pressing machine is started, and the angle monitoring system is used for continuously monitoring the pile pressing angle and the pile pressing path of a supporting pile; when monitoring that the pile pressing angle or the pile pressing path of the support pile deviates, the system immediately sends out an audible and visual alarm signal, and when exceeding the angle deviation allowable range, the central inclined pile pressing machine is immediately closed to stop pressing the pile and an alarm signal is sent to the control processor; the angle monitoring system generates an alarm signal to the control processor, and simultaneously drives the luffing cylinder on the portal frame assembly 3 through the control processor to adjust the portal frame assembly 3 to return to a preset pile pressing construction angle and a construction path; when the angle monitoring system detects that the support pile returns to the preset pile pressing angle and pile pressing path again, the control processor restarts the amplitude-variable hydraulic pile pressing oil cylinder 4 to press the pile while stopping sending the alarm signal, and returns to the monitoring state.
The construction method of the middle-arranged inclined pile pressing machine for supporting single-row construction of the unsupported precast inclined piles of the foundation pit takes the construction of the first supporting pile as an example, and specifically comprises the following steps of:
(1) arranging a central inclined pile pressing machine on the construction site of the foundation pit C, and enabling the length direction of a supporting platform assembly 1 of the central inclined pile pressing machine to be vertical to the operation surface, namely the arrangement direction of the piles; this put formula batter pile machine in middle includes: a supporting platform assembly 1 arranged in parallel with the axial lead in the length direction; the long ship assembly 7 and the short ship assembly 2 are arranged in a cross way with the axial lead in the length direction, wherein a luffing portal frame assembly 3 is arranged on the supporting platform assembly 1, the portal frame assembly 3 is arranged at the geometric center of the supporting platform assembly 1, a pile pressing oil cylinder 4 is arranged on the portal frame assembly 3, and the pile pressing oil cylinder 4 is also connected with a pile clamping device assembly 5 arranged on the portal frame assembly 3; the amplitude-variable portal frame assembly 3 and the pile clamping device assembly 5 are made to swing in the inclination angle range of +/-30 degrees and in the front-back direction vertical to the construction working surface so as to adjust the pile pressing angles of the inclined piles and the straight piles in the support piles; each group of the unsupported precast inclined pile supporting single-row piles at least comprises 2 supporting piles A, namely an outer inclined pile A1+ a straight pile A2 or an outer inclined pile A1+ an inner inclined pile A2;
the inclination of the vertical piles is 0, the inclination towards the outside is denoted by + and the inclination towards the inside is denoted by-.
The range of inclination angles of ± 30 ° means: the maximum inclination angle inward and outward is 30 degrees vertically or based on the vertical pile.
(2) The pile pressing machine reaches a first machine position, a crane assembly 6 arranged on a supporting platform assembly 1 is started, a supporting pile A1 needing to be pressed into a foundation soil body B is hoisted by controlling the crane assembly 6 and is placed in a pile clamping device assembly 5 of a portal frame assembly 3, and the supporting pile A1 is clamped and fixed by the pile clamping device assembly 5 on the portal frame assembly 3;
(3) the gantry assembly 3 sets and fixes the pile pressing angle of the A1 support pile within the inclination angle range of +/-30 degrees; in this embodiment, the inclination angle is +30 °, i.e., 30 ° to the outside; starting the pile pressing oil cylinder 4, driving the pile clamping device assembly 5 connected with the pile pressing oil cylinder 4 to press the pile downwards through the pile pressing oil cylinder 4, and pressing the A1 support pile into the foundation soil body through static force;
(4) when the A1 support pile is driven to a preset depth, the pile gripper assembly 5 is loosened, the fixed state between the pile gripper assembly 5 and the A1 support pile is released, and the left and right directions of the whole machine are moved and shifted to the construction station position of the A2 support pile through the extension and retraction of a hydraulic mechanism on the long ship assembly 7 of the supporting platform assembly 1;
(5) starting a crane assembly 6 arranged on the supporting platform assembly 1, hoisting a support pile A2 needing to be pressed into a foundation soil body by controlling the crane assembly 6, placing the support pile A2 into a pile gripper assembly 5 of the portal frame assembly 3, and clamping and fixing a support pile A2 by the pile gripper assembly 5 on the portal frame assembly 3;
(6) the gantry assembly 3 sets the pile pressing angle of the A2 support pile in the inclination angle range of +/-30 degrees and fixes (the inclination angle of the vertical pile is 0, the inclination angle value is plus when the vertical pile inclines outwards, and the inclination angle value is minus) the pile pressing angle; starting a pile pressing oil cylinder 4, driving a pile clamping device assembly 5 connected with the pile pressing oil cylinder 4 to press piles downwards through the pile pressing oil cylinder 4, and pressing an A2 support pile into a foundation statically to form a row pile with an A1 support pile to finish the construction of a group of support piles;
(7) after the construction of each group of supporting piles of a first machine position is completed in sequence, the pile press machine realizes the forward and backward movement of the whole machine and shifts to the next machine position to complete the construction position of each group of supporting piles of the machine position through the extension and retraction of a hydraulic mechanism on a shot boat assembly 2 of a supporting platform assembly 1;
(8) and (5) repeating the steps (2) to (7), and pressing each group of support piles into the foundation respectively to complete pile pressing construction of each group of support piles of the single-row construction of the support-free prefabricated support piles on the working surface of the whole foundation pit.
Referring to the above embodiment, in 1, when the second outer inclined pile a1+ inner inclined pile a2 is performed, only the inclination angle of each inclined pile needs to be correspondingly adjusted, and other steps are the same.
In the single-row construction method for supporting the unsupported precast inclined pile of the foundation pit in this embodiment, when the third supporting pile is constructed, referring to embodiment 1, the difference is that the method further includes the following steps:
(1a) each group of the support-free prefabricated inclined pile supporting single-row piles comprises 3 supporting piles, namely an outer inclined pile A1, a straight pile A2 and an inner inclined pile A3;
it also includes the following steps:
(5a) the left-right movement is realized through the extension of a hydraulic mechanism of the long ship assembly 7, the third support pile A3 is pressed into the position, a crane assembly 6 arranged on the supporting platform assembly 1 is started, a support pile A3 needing to be pressed into a foundation soil body is hoisted and placed in a pile clamp assembly 5 of the portal frame assembly 3 through controlling the crane assembly 6, and the support pile A3 is fixed through the pile clamp assembly 5 on the portal frame assembly 3;
(6a) the gantry assembly 3 sets and fixes the pile pressing angle of the A3 support pile within the inclination angle range of +/-30 degrees; and starting the pile pressing oil cylinder 4, driving the pile clamping device assembly 5 connected with the pile pressing oil cylinder 4 to press piles downwards, and statically pressing the A3 support piles into the foundation to form row piles with the A1 and A2 support piles, so that the construction of a group of support piles is completed.
In the single-row construction method for the support of the unsupported precast inclined pile of the foundation pit in the embodiment, the step (1) further comprises the following steps:
(11) the supporting platform assembly 1 of the central inclined pile pressing machine is provided with a short ship assembly 2, and when the pressing machine needs to be integrally transferred to a next working position, the front and back movement of the whole machine is realized through the extension and retraction of a hydraulic mechanism on the short ship assembly 2 of the supporting platform assembly 1;
(12) the left and right movement of the whole machine is realized through the extension and retraction of a hydraulic mechanism on a long ship assembly 7 of the supporting platform assembly 1 so as to complete the construction operation of a group of supporting piles on the working position;
(13) and (5) repeating the steps (11) and (12), continuously and integrally moving the pile press to a new working position, and performing the construction operation of the next group of support piles until the pile press construction operation of the whole row of support piles is completed.
In the single-row construction method for supporting the unsupported precast inclined pile of the foundation pit in this embodiment, the steps (3) and (6) further include the following steps:
(31) (61), the portal frame assembly 3 is started, and the inclination angle and the position of the portal frame assembly 3 are adjusted together through a rotating shaft and a variable amplitude oil cylinder on the portal frame assembly 3, so that the inclination angle and the position of a support pile are consistent with the preset construction inclination angle and position of the support pile, and the central inclined pile press can realize the vertical or inward and outward inclined pile press construction of the support pile through the angle adjustment of the central portal frame assembly 3.
The utility model provides an in foundation ditch unsupported precast inclined pile strut single row construction is with putting formula inclined pile driver in, its design focus lies in:
1. in the single-row construction method for supporting the unsupported precast inclined pile of the foundation pit and the central inclined pile press-in machine in the embodiment, a complete set design method for the inclined support pile is provided by redesigning the portal frame assembly aiming at the construction characteristics of the row pile of the unsupported foundation pit, and a central inclined pile press-in machine of the special static pile press-in equipment for the inclined pile capable of constructing +/-30 degrees is developed (the inclined pile capable of constructing +/-20 degrees in the prior art); the length direction of a support plate of the equipment is vertical to the working surface, the long ship assembly is controlled to move left and right, the short ship assembly is controlled to move front and back, and the pile clamping device swings in the front and back directions. After the long ship assembly is deployed to a working position of a working face, construction of each group of support piles of the working position can be completed only by operating the long ship assembly and moving the long ship assembly left and right, and the long ship assembly moving device is high in moving speed, high in piling efficiency and high in precision.
2. In the central inclined pile pressing machine in the embodiment, the portal frame and the pile clamping device are arranged in the middle of the supporting platform, the space of the cylinder body of the variable-amplitude oil cylinder and the piston rod of the variable-amplitude oil cylinder on the supporting platform is greatly expanded, the two-stage oil cylinder is arranged, the variable-amplitude range is expanded to +/-30 degrees, the stroke is synchronously increased, the large inclination angle and the long stroke of +/-20 degrees or more can be realized, the application range of the machine is expanded, and the machine is suitable for pile pressing operation of the prefabricated support pile with the large variable-amplitude inclination angle and the long stroke.
3. In the single-row construction method for supporting the unsupported precast inclined pile of the foundation pit and the central inclined pile pressing machine in the embodiment, because the portal frame and the pile clamping device are arranged in the middle of the supporting platform (i.e. the geometric center position facing away from the crane and facing the working surface), the integral gravity center of the pile pressing machine in a non-pile pressing working state is positioned in the middle of the supporting platform, and the integral balance (balance of the whole machine in a dynamic state) is easily controlled in the machine moving or shifting process, so that the speed of machine moving or shifting is accelerated, and the construction safety is improved.
4. In the single-row construction method for supporting the unsupported precast inclined pile of the foundation pit and the central inclined pile pressing machine in the embodiment, because the center of gravity of the whole pressing machine is also positioned in the middle of the supporting platform, the front part and the rear part of the supporting platform are uniformly stressed in the pile pressing working state, the front part of the supporting platform is prevented from locally sinking under heavy pressure, the integral stability and the pile driving precision of equipment cannot be influenced, and the construction safety is also improved.
5. In the single-row construction method for supporting a foundation pit unsupported precast inclined pile and the central inclined pile pressing machine in the embodiment, in the process of carrying out multi-stage supporting construction operation such as vertical and inclined combined single-row supporting piles, inclined and inclined combined single-row supporting piles and the like under the condition that the foundation pit is unsupported, the direction design of a supporting platform and a portal frame assembly is reasonable, the defects that the time consumption is long, the energy consumption is high, the construction speed is low, the precision of the pressed-in inclination angle and the pressed-in position of a pile body is low and the construction efficiency and the cost are influenced when the operation of pressing each supporting pile is completed and then the operation of moving a machine is needed are overcome, and one group or multiple groups of supporting pile pressing operations can be completed at each station. Particularly, in large-scale engineering construction, the construction efficiency of pile pressing operation for multi-stage support piles is higher, and the cost is lower.
6. In the foundation pit support-free prefabricated inclined pile support single-row construction method and the central inclined pile pressing machine in the embodiment, through the central inclined pile pressing machine, single-row support pile construction in modes of vertical and inclined combined single-row support piles, inclined and inclined combined single-row support piles and the like can be realized, and horizontal support-free construction can be realized within a depth range of 5m-10 m; the method can be applied to earth excavation in the foundation pit without the horizontal support and construction of the underground structure of the building, can save the construction period of construction and dismantling without the horizontal support in the prior construction technology, and can obviously shorten the construction period.
7. In the single-row construction method for supporting the unsupported precast inclined piles of the foundation pit and the central inclined pile pressing machine in the embodiment, the single-row construction of supporting the unsupported precast inclined piles of the foundation pit is carried out by adopting the precast support piles, so that the industrialized construction by adopting the precast support piles can be realized; underground pipe gallery can adopt prefabricated pipe gallery to assemble in the no horizontal support foundation ditch, realizes underground pipe gallery's industrialization and builds.
The present invention has been described in detail with reference to the embodiments shown in the drawings, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.
Claims (6)
1. A middle-arranged inclined pile press machine for supporting single-row construction of a supporting-free precast inclined pile of a foundation pit is characterized by comprising a supporting platform assembly, a crane assembly and a middle-arranged portal frame assembly, wherein the crane assembly and the middle-arranged portal frame assembly are arranged on the supporting platform assembly; the length direction of the supporting platform assembly is vertical to the operation surface, namely the arrangement direction of the piles; the supporting platform assembly comprises a long ship assembly and a short ship assembly which are arranged in a crossed manner with the axial lead of the supporting platform assembly in the length direction; the supporting platform assembly is provided with a luffing portal frame assembly, the portal frame assembly is arranged at the geometric center of the supporting platform assembly, and the portal frame assembly is provided with a pile pressing oil cylinder and is also connected with a pile clamping device assembly arranged on the portal frame assembly; the amplitude-variable portal frame assembly and the pile clamping device assembly swing back and forth in a direction perpendicular to a construction working surface within an inclination angle range of +/-30 degrees so as to adjust pile pressing angles of an inclined pile and a straight pile in the support pile; the portal frame assembly completes pile pressing construction of one or more groups of support piles on one machine position through the matching action of the rotating shaft and the variable amplitude oil cylinder on the outer side of the portal frame assembly and the long ship assembly and the short ship assembly on the supporting platform assembly.
2. The central inclined pile pressing machine for supporting single row construction of unsupported precast inclined piles of foundation pits of claim 1, which is characterized in that an angle monitoring system is further arranged on the portal frame assembly, the angle monitoring system is electrically connected with a control processor of the central inclined pile pressing machine, when the central inclined pile pressing machine is started, the angle monitoring system is started simultaneously, and the angle monitoring system continuously monitors the pile pressing angle and the pile pressing path of the supporting pile; when monitoring that the pile pressing angle or the pile pressing path of the support pile deviates, the system immediately sends out an audible and visual alarm signal, and when exceeding the angle deviation allowable range, the central inclined pile pressing machine is immediately closed to stop pressing the pile and an alarm signal is sent to the control processor; the angle monitoring system generates an alarm signal to the control processor, and simultaneously drives the luffing cylinder on the portal frame assembly to adjust the portal frame assembly to return to a preset pile pressing construction angle and a construction path through the control processor; when the angle monitoring system detects that the supporting pile returns to the preset pile pressing angle and pile pressing path again, the control processor restarts the amplitude-variable hydraulic pile pressing oil cylinder to press the pile while stopping sending the alarm signal, and returns to the monitoring state.
3. The middle-mounted inclined pile pressing machine for supporting single-row construction of the unsupported precast inclined pile of the foundation pit according to claim 1, wherein a pile pressing oil cylinder for static pile pressing is arranged on the middle-mounted portal frame assembly, and the pile pressing oil cylinder is connected with the top end of a pile clamping device assembly arranged on the portal frame assembly through a piston rod and a pin shaft; the pile pressing oil cylinder comprises two main pressure oil cylinders and two auxiliary pressure oil cylinders, the cylinder barrels of the main pressure oil cylinders and the auxiliary pressure oil cylinders are fixed at the upper end of the portal frame assembly, and the auxiliary pressure oil cylinders form an auxiliary pressurization structure and are used in large tonnage.
4. The middle-positioned inclined pile pressing machine for supporting single-row construction of the unsupported precast inclined pile of the foundation pit according to claim 1, wherein the supporting platform assembly is further provided with a control processor, the portal frame assembly is provided with an angle monitoring system, and the control processor is electrically connected with the angle monitoring system.
5. The middle-mounted inclined pile pressing machine for supporting single-row construction of the unsupported precast inclined pile of the foundation pit according to claim 4, wherein a pile pressing oil cylinder fixing seat matched with the pile pressing oil cylinder is arranged on the portal frame assembly, and the pile pressing oil cylinder is arranged behind the pile pressing oil cylinder fixing seat and connected with the pile clamping assembly through a piston rod and a pin shaft.
6. The middle-positioned inclined pile pressing machine for supporting single-row construction of the unsupported precast inclined pile of the foundation pit as claimed in claim 1, wherein a radial telescopic pile clamping structure is arranged in the pile clamping assembly, two opposite side surfaces of the pile clamping assembly are respectively provided with a guide member, and the guide members are movably connected with guide supports on the inner side of the portal frame assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920962724.2U CN210421089U (en) | 2019-06-25 | 2019-06-25 | Middle-arranged inclined pile pressing machine for supporting single-row construction of support-free prefabricated inclined piles of foundation pit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110735430A (en) * | 2019-06-25 | 2020-01-31 | 广东力源液压机械有限公司 | single-row construction method for support-free precast support piles of foundation pit and middle-arranged inclined pile pressing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110735430A (en) * | 2019-06-25 | 2020-01-31 | 广东力源液压机械有限公司 | single-row construction method for support-free precast support piles of foundation pit and middle-arranged inclined pile pressing machine |
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