Complex interactive boulder stratum rotary excavating hole-forming cast-in-place pile and construction method

Abstract

The invention relates to the technical field of cast-in-place piles, and discloses a complex interactive boulder stratum rotary excavating hole-forming cast-in-place pile and a construction method thereof.The complex interactive boulder stratum rotary excavating hole-forming cast-in-place pile comprises a pile base fixed to the bottom of a pile body, a plurality of transverse bar steel bar columns arranged in the pile body, a plurality of vertical bar steel bar columns corresponding to the top and the bottom of the pile body, and pile bases inserted to the bottoms of the vertical bar steel bar columns; two L-shaped arc clamping plates I and II are respectively arranged at the top and the bottom of the joint of the two vertical bars and the transverse bar reinforcing steel bar column, sliding grooves are formed in the corresponding positions of the transverse bar reinforcing steel bar column, and sliding blocks of the clamping plates are in sliding connection with the transverse bar reinforcing steel bar column, and convex clamping blocks of the left and right L-shaped arc clamping plates I are clamped with convex clamping grooves of the vertical bar reinforcing steel bar column; the first reinforcing grooves of the upper clamping plate and the lower clamping plate are internally provided with first bidirectional threaded reinforcing rods penetrating through the transverse bar steel bar columns, and the second reinforcing grooves of the clamping plates are internally provided with second bidirectional threaded reinforcing rods penetrating through the vertical bar steel bar columns and the convex clamping blocks. According to the invention, the joint can resist multiple stresses such as vertical load, horizontal shearing force and torsional moment, and the three-dimensional reinforcing system dispersedly bears the stresses in the longitudinal and transverse directions and adapts to a complex stress environment of a complex boulder stratum.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bored piles, and particularly relates to a rotary drilling bored pile in complex interactive boulder stratum and a construction method. BACKGROUND

[0002] The rotary drilling bored pile, which is made of reinforced concrete, is widely used in the foundation construction of highways, railways, bridges and large buildings under the background of rapid development of urban construction. With the increasing number of high-rise buildings and important buildings in the city, higher requirements are put forward for the bearing capacity, stability and durability of the foundation pile. Especially in the complex interactive boulder stratum, the bored pile needs to bear complex stresses from multiple directions such as vertical and horizontal directions. The rationality of the structural design of the bored pile is directly related to the safety and stability of the entire building.

[0003] In the prior art, the cross node of the horizontal steel bar column and the vertical steel bar column of the bored pile is connected by a simple binding or single-point welding method. This connection method has a small contact area and stress concentration. When subjected to lateral pressure or seismic load, the node is prone to looseness or even fracture, resulting in a decrease in the overall structural stability and difficulty in meeting the requirements of the complex boulder stratum for the stability of the node. At the same time, the traditional connection method cannot form an effective overall stress system. When the bored pile bears complex stresses such as horizontal shear force and torsional moment, the steel reinforcement skeleton is prone to local damage or overall instability. Especially when the depth of the pile body increases, the self-weight and the earth pressure of the steel reinforcement skeleton gradually increase, further aggravating the problem of insufficient structural strength, and the complex interactive boulder stratum cannot adapt to the complex stress environment. SUMMARY

[0004] In order to make up for the above shortcomings, the present application provides a rotary drilling bored pile in complex interactive boulder stratum and a construction method, which aims to improve the problem that the traditional connection method cannot form an effective overall stress system. The rotary drilling bored pile in complex interactive boulder stratum and a construction method can prevent looseness, fracture or overall instability when the complex boulder stratum bears multiple complex stresses.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: A complex interactive boulder stratum rotary drilling bored pile, comprising a pile body, the bottom of the pile body is fixedly connected with a pile base, the inside of the pile body is fixedly connected with a plurality of horizontal steel bar columns, the inside of the pile body is fixedly assembled with a plurality of vertical steel bar columns corresponding to the top and bottom of the plurality of horizontal steel bar columns, the bottom of the vertical steel bar column is inserted into the inside of the pile base; the top and bottom of the connection between the two vertical steel bar columns and the horizontal steel bar column are respectively provided with two L-shaped arc clamping plates one and two, the top and bottom of the surface of the horizontal steel bar column are respectively provided with sliding grooves corresponding to the two sides of the vertical steel bar column, the opposite side of the L-shaped arc clamping plate one and the L-shaped arc clamping plate two is fixedly connected with a sliding block corresponding to the side close to the horizontal steel bar column, and the sliding block is slidably connected with the sliding groove; the opposite side of the two L-shaped arc clamping plates one arranged left and right is fixedly connected with a convex clamping block corresponding to the side close to the vertical steel bar column, the two sides of the surface of the vertical steel bar column are respectively provided with convex clamping grooves corresponding to the top and bottom of the horizontal steel bar column, and the convex clamping block is clamped with the convex clamping groove; the side close to the vertical steel bar column of the side away from each other of the two L-shaped arc clamping plates one and the two L-shaped arc clamping plates two arranged up and down is longitudinally provided with a reinforcing groove one, and a bidirectional threaded reinforcing rod one is arranged between the two reinforcing grooves one arranged longitudinally, and the central position of the bidirectional threaded reinforcing rod one penetrates the horizontal steel bar column; the top position of the opposite side of the two L-shaped arc clamping plates one and the bottom position of the opposite side of the two L-shaped arc clamping plates two are respectively provided with a reinforcing groove two, and a bidirectional threaded reinforcing rod two is arranged between the two reinforcing grooves two arranged horizontally, and the central position of the bidirectional threaded reinforcing rod two penetrates the vertical steel bar column and the two convex clamping blocks.

[0006] Preferably, the L-shaped arc clamping plate one and the L-shaped arc clamping plate two are symmetrically arranged, the two L-shaped arc clamping plates one arranged left and right are symmetrically arranged, and the two L-shaped arc clamping plates two arranged left and right are symmetrically arranged.

[0007] Preferably, the top and bottom of the bidirectional threaded reinforcing rod one are respectively threadedly connected with fixed nuts one, and the opposite side of the two fixed nuts one arranged up and down respectively contacts the end away from each other of the L-shaped arc clamping plate one and the L-shaped arc clamping plate two; the two sides of the bidirectional threaded reinforcing rod two are respectively threadedly connected with fixed nuts two, and the opposite side of the four fixed nuts two arranged left and right respectively contacts the end away from each other of the two L-shaped arc clamping plates one and the two L-shaped arc clamping plates two.

[0008] Preferably, the top of the pile body is fixedly assembled with a limiting frame, the top of the vertical steel bar column penetrates to the outside of the limiting frame, and the two sides of the limiting frame are fixedly connected with limiting seats.

[0009] Preferably, the outer side of the plurality of vertical steel bar columns is welded with annular steel bars corresponding to the two horizontal steel bars arranged up and down.

[0010] Preferably, the opposite sides of the two sliding blocks arranged in upper and lower positions respectively penetrate into the interiors of the two sliding grooves, one side of the sliding groove is fixedly connected with a supporting short rod, and the supporting short rod is sleeved and slidingly connected with the sliding block.

[0011] Preferably, a fixing groove one is arranged at a central position of a rear side of a bottom of the L-shaped arc clamping plate one and a central position of a front side of a top of the L-shaped arc clamping plate two, and a fixing block is fixedly connected with a central position of a front side of a bottom of the L-shaped arc clamping plate one and a central position of a rear side of a top of the L-shaped arc clamping plate two, and the fixing block is clamped with the fixing groove one.

[0012] Preferably, a buckle groove is arranged at a center of a bottom of the fixing block, and a buckle block one is fixedly connected with a center of an inner bottom of the fixing groove one, and the buckle block one is clamped with the buckle groove.

[0013] Preferably, a fixing groove two is arranged at a central position of a front end of a side of the L-shaped arc clamping plate one arranged on one side and a rear end of a side of the L-shaped arc clamping plate one arranged on the other side, and two arc-shaped clamping buckle plates are fixedly connected with a central position of a rear end of a side of the L-shaped arc clamping plate one arranged on one side and a central position of a front side of a side of the L-shaped arc clamping plate one arranged on the other side, and the two arc-shaped clamping buckle plates are clamped with the fixing groove two.

[0014] A construction method of a rotary digging hole filling pile in a complex interactive boulder stratum, comprising the following steps:

[0015] S1, leveling and cleaning the bottom of the rotary digging hole, fixing the pile base to the hole bottom through a pre-buried part or grouting, ensuring horizontal stability; inserting the vertical steel column bottom into the pile base insertion hole, fixing the verticality through temporary support, installing the vertical steel column at a designed interval, then installing the horizontal steel column at a corresponding preset height to form a cross structure, and then opening sliding grooves at the top and bottom of the horizontal steel column and on both sides of the vertical steel column after position calibration to ensure smooth grooves;

[0016] S2, aligning the sliding blocks of the L-shaped arc clamping plate one and the L-shaped arc clamping plate two with the sliding grooves, and pushing them into the vertical steel column along the supporting short rods; adjusting the clamping plate position, so that the convex clamping block of the L-shaped arc clamping plate one is aligned with and inserted into the convex clamping groove of the vertical steel column, and checking whether the clamping is tight and gapless;

[0017] S3, passing the two-way threaded reinforcing rod one through the reinforcing groove one of the L-shaped arc clamping plate two, the horizontal steel column through hole, and the reinforcing groove one of the L-shaped arc clamping plate one, and then sleeving the fixed nut one on the top and bottom thereof and tightening symmetrically to adhere to the clamping plate; passing the two-way threaded reinforcing rod two through the clamping groove two of the one side clamping plate, the convex clamping block, the vertical steel column through hole, and the clamping groove two of the other side clamping plate, and then sleeving the fixed nut two on both sides and tightening symmetrically to lock the convex clamping block and the convex clamping groove;

[0018] S4, check all L-shaped arc card board card joint state and reinforcing rod, nut connection tightness, through knocking or tension test to confirm that there is no looseness;Weld annular reinforcement between the vertical steel column outside, upper and lower horizontal steel column according to the design spacing, ensure that the weld is full and firm;The limiting frame is sleeved on the top of the vertical steel column, adjusted to horizontal and fixed on the top of the pile body, then the limiting seat is symmetrically fixed on both sides of the limiting frame, ensure stable connection with the pile body or surrounding structure, complete installation.

[0019] The present application has the following beneficial effects:

[0020] 1、In the present application, firstly, the structure can significantly improve the node stability and overall bearing capacity of the cast-in-place pile in the complex interactive boulder stratum. At the intersection node of the vertical steel column and the horizontal steel column, the L-shaped arc card board one and the L-shaped arc card board two on the top and the bottom are precisely slid along the sliding groove through the sliding block, which can quickly realize the alignment with the steel column and avoid the uneven stress problem caused by position deviation in the traditional connection mode. During the sliding process, the fitting contact between the sliding block and the sliding groove can also pre-disperse part of the installation stress, laying a stable foundation for subsequent fixation. The convex clamping block on the L-shaped arc card board one and the convex clamping groove of the vertical steel column form multiple occlusion structures, compared with traditional single-point welding or binding, the contact area is expanded several times, so that the lateral pressure or seismic load can be uniformly transmitted to the horizontal and vertical steel columns through the card board, completely solving the pain points of stress concentration and easy loosening and fracture at the node. More importantly, the bidirectional threaded reinforcing rod one longitudinally penetrates the reinforcing groove one of the horizontal steel column and the card board, and the bidirectional threaded reinforcing rod two transversely penetrates the reinforcing groove two of the vertical steel column, the convex clamping block and the card board, forming a three-dimensional reinforcing network of “longitudinal tensioning + transverse locking”, the longitudinal reinforcement can resist the tensile force caused by the self weight and vertical load of the pile body, the transverse reinforcement can offset the horizontal shear force generated by the rock extrusion in the boulder stratum, and the synergistic effect of the two can effectively cope with the common torsional moment in complex stratum, ensuring that the node remains stable under multiple stress superposition, providing reliable support for deep pile construction and long-term use.

[0021] 2、In the application, the symmetrical arrangement of the L-shaped arc clamping plate makes the stress on both sides of the node completely balanced, avoiding deformation or damage caused by one-sided excessive load; the cooperation of the fixed nut and the bidirectional threaded reinforcing rod can continuously maintain the connection tightness after construction through the thread self-locking characteristic, and is not easy to loosen even in a long-term vibration environment, significantly improving the durability of the reinforcing effect. The limiting frame and the limiting seat form a rigid constraint on the top of the pile body, controlling the shaking amplitude of the vertical steel column top to the minimum range, and cooperating with the insertion and fixation of the vertical steel column bottom and the pile base to form a whole stress system of "upper and lower constraint, middle stable", enhancing the vertical anti-overturning capacity. The annular reinforcement is welded outside the vertical steel column, connecting the dispersed vertical steel columns into a closed ring structure, not only improving the horizontal integrity of the reinforcement cage, but also offsetting the lateral extrusion caused by soil pressure when the depth of the pile body increases through the annular dispersion effect, avoiding local reinforcement bending due to excessive stress. The sleeve cooperation of the supporting short rod and the sliding block not only provides guidance for the sliding block to prevent it from deviating and jamming in the sliding groove, but also enhances the connection strength of the sliding block and the sliding groove, making the clamping plate installation efficiency improve by more than 30%. The multiple clamping of the fixed groove and the fixed block, the buckle block and the buckle groove, and the cooperation of the arc buckle plate and the fixed groove two further lock the position of the clamping plate from multiple dimensions of up and down, left and right, prevent displacement caused by material fatigue or environmental vibration in long-term use, and form a whole cycle stable protection of "initial fixation + multiple insurance". The corresponding construction method divides the complex connection process into simple operations through clear step division, reduces the dependence on high-precision welding equipment, can guarantee the connection quality of each part, and can shorten the construction period, so that the cast-in-place pile can still be efficiently assembled in complex stratum environment and quickly put into use. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 An overall view of a complex interactive boulder stratum rotary drilling cast-in-place pile is proposed in the application;

[0023] Figure 2 An overall view of a complex interactive boulder stratum rotary drilling cast-in-place pile is proposed in the application; Figure 1 A local enlarged view of A;

[0024] Figure 3 A connection structure side view sectional view of L-shaped arc clamping plate one and L-shaped arc clamping plate two of a complex interactive boulder stratum rotary drilling cast-in-place pile is proposed in the application;

[0025] Figure 4 A connection structure top view sectional view of L-shaped arc clamping plate one and L-shaped arc clamping plate two of a complex interactive boulder stratum rotary drilling cast-in-place pile is proposed in the application;

[0026] Figure 5 An overall view of a complex interactive boulder stratum rotary drilling cast-in-place pile is proposed in the application; Figure 3A partial enlarged view of the middle B;

[0027] Figure 6 A complex interactive boulder stratum rotary drilling cast-in-place pile of the present application Figure 5 A partial enlarged view of the middle C;

[0028] Figure 7 A complex interactive boulder stratum rotary drilling cast-in-place pile of the present application

[0029] Figure 8 A complex interactive boulder stratum rotary drilling cast-in-place pile of the present application

[0030] Legend:

[0031] 1, pile body; 2, pile base; 3, vertical steel column; 4, horizontal steel column; 5, limiting frame; 6, limiting seat; 7, ring-shaped steel; 8, L-shaped arc clamping plate one; 9, L-shaped arc clamping plate two; 10, sliding groove; 11, sliding block; 12, supporting short rod; 13, convex clamping groove; 14, convex clamping block; 15, reinforcing groove one; 16, bidirectional threaded reinforcing rod one; 17, fixed nut one; 18, reinforcing groove two; 19, bidirectional threaded reinforcing rod two; 20, fixed nut two; 21, fixed groove one; 22, fixed block; 23, buckle groove; 24, buckle block one; 25, fixed groove two; 26, buckle block two; 27, arc-shaped buckle plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] Embodiment one, refer to Figures 1-8The utility model provides a complex interaction boulder stratum rotary drilling filling pile, including the pile body 1, the bottom fixedly connected with the pile base 2 of the pile body 1, the inside fixedly connected with a plurality of horizontal strip steel column 4 of the pile body 1, the inside fixedly assembled with a plurality of vertical strip steel column 3 of the top and bottom of a plurality of horizontal strip steel column 4 of the pile body 1, the bottom of vertical strip steel column 3 is inserted with the inside of the pile base 2, two vertical strip steel column 3 and the top and bottom of the connecting place of horizontal strip steel column 4 are provided with two L type arc clamping plate no. 8 and two L type arc clamping plate no. 9 respectively, the top and bottom of horizontal strip steel column 4 surface are all set up with sliding slot 10 corresponding to the two sides of vertical strip steel column 3, the opposite side of L type arc clamping plate no. 8 and L type arc clamping plate no. 9 is fixedly connected with sliding block 11 corresponding to the side close to horizontal strip steel column 4, and sliding block 11 is connected with sliding slot 10, the opposite side of two L type arc clamping plate no. 8 set up left and right is fixedly connected with convex clamping block 14 corresponding to the side close to vertical strip steel column 3, and the two sides of vertical strip steel column 3 surface are all set up with convex clamping slot 13 corresponding to the top and bottom of horizontal strip steel column 4, and convex clamping block 14 is clamped with convex clamping slot 13, and the side close to vertical strip steel column 3 is set up with the reinforcing groove no. 15 of longitudinal direction corresponding to the side of the position of the opposite side of two L type arc clamping plate no. 8 and two L type arc clamping plate no. 9, and the reinforcing groove no. 15 of longitudinal direction is set up between two, and the reinforcing rod no. 16 of two-way screw is set up between two reinforcing groove no. 15 of longitudinal direction, and the reinforcing rod no. 16 of two-way screw is penetrated with horizontal strip steel column 4, and the top position of the opposite side of two L type arc clamping plate no. 8 and the bottom position of the opposite side of two L type arc clamping plate no. 9 are all set up with the reinforcing groove no. 18 of horizontal direction, and the reinforcing rod no. 19 of two-way screw is set up between two reinforcing groove no. 18 of horizontal direction, and the reinforcing rod no. 19 of two-way screw is penetrated with vertical strip steel column 3 and two convex clamping block 14.

[0034] The node can effectively resist multiple stresses such as vertical load, horizontal shear force and torsional moment, the multi-point clamping design of the L-shaped arc clamping plate no. 8 and the L-shaped arc clamping plate no. 9 greatly expands the contact area, so that stress is no longer concentrated on a single node, the three-dimensional reinforcing system of the reinforcing rod no. 16 of two-way screw and the reinforcing rod no. 19 of two-way screw disperses forces in different directions to a larger range through longitudinal and transverse cooperation to avoid local overload, and especially in complex boulder strata, the three-dimensional reinforcing system can better adapt to the complex stress environment caused by rock extrusion.

[0035] Embodiment two, refer to Figures 1-8On the basis of embodiment one, the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9 are symmetrically arranged, the two L-shaped arc clamping plates one 8 arranged left and right are symmetrically arranged, the two L-shaped arc clamping plates two 9 arranged left and right are symmetrically arranged, the stress of the node in each direction always remains balanced, the symmetrical distribution of the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9 makes the stress uniformly transmitted on both sides of the node, whether it is vertical pressure or horizontal shear force can be borne by the structure on both sides, which fundamentally avoids deformation or even damage of one side due to excessive stress, and ensures the structural integrity of the node in long-term use; the top and bottom of the bidirectional threaded reinforcing rod one 16 are threadedly connected with the fixed nut one 17, and the opposite sides of the two fixed nuts one 17 arranged up and down are respectively in contact with the opposite ends of the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9; the two sides of the bidirectional threaded reinforcing rod two 19 are threadedly connected with the fixed nut two 20, and the opposite sides of the four fixed nuts two 20 arranged left and right are respectively in contact with the opposite ends of the two L-shaped arc clamping plates one 8 and the opposite ends of the two L-shaped arc clamping plates two 9, the connection part can be tightly fitted and is not easy to loosen, after the fixed nut one 17, the fixed nut two 20 and the bidirectional threaded reinforcing rod one 16, the bidirectional threaded reinforcing rod two 19 are tightly screwed, the self-locking characteristic between the threads continuously maintains the pre-tightening force of the friction force generated on the thread contact surface, which can effectively reduce the loosening phenomenon even under the influence of long-term vibration, ground settlement and other environmental factors, significantly enhance the durability of the reinforcing effect, and prolong the stable period of the structure; the top of the pile body 1 is fixedly assembled with the limiting frame 5, the top of the vertical steel column 3 penetrates to the outside of the limiting frame 5, the two sides of the limiting frame 5 are fixedly connected with the limiting seat 6, the top of the pile body 1 can always remain stable, the limiting structure formed by the limiting frame 5 and the limiting seat 6 rigidly constrains the top of the vertical steel column 3, which not only limits the lateral movement of the vertical steel column 3 but also controls the longitudinal displacement amplitude, cooperates with the fixation of the bottom pile base 2 to form a stress system of "upper and lower constraints and middle continuity" for the whole pile body 1, and greatly improves the vertical stability of the overall structure; the outer side of the plurality of vertical steel columns 3 is welded with the annular steel 7 between the upper and lower horizontal steel columns 4, the horizontal anti-deformation capacity of the steel framework is significantly enhanced, the annular steel 7 connects the dispersed vertical steel columns 3 into a closed whole to change the stress state of the traditional dispersed steel, and the force can be uniformly transmitted to each vertical steel column 3 through the annular structure when subjected to lateral pressure, avoiding bending of local steel due to stress concentration, especially in the case of deep pile body 1 and large soil pressure, the dispersion effect is more critical.

[0036] Embodiment three, refer to Figures 1-8On the basis of embodiment one or embodiment two, the opposite sides of the two sliding blocks 11 arranged up and down are respectively penetrated into the interiors of the two sliding grooves 10, one side of the sliding groove 10 is fixedly connected with a supporting short rod 12, the supporting short rod 12 is sleeved and slidingly connected with the sliding block 11, the installation process of the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9 can be smooth and not jammed, the supporting short rod 12 provides a clear guide path for the sliding block 11 to ensure that it can only move in the preset direction in the sliding groove 10, effectively preventing deviation or jamming phenomenon, ensuring the accurate alignment of the clamping plate and the reinforced column and reducing the adjustment time in the installation process, significantly improving the construction efficiency; the center position of the bottom rear side of the L-shaped arc clamping plate one 8 and the center position of the top front side of the L-shaped arc clamping plate two 9 are both provided with a fixed groove one 21, the center position of the bottom front side of the L-shaped arc clamping plate one 8 and the center position of the top rear side of the L-shaped arc clamping plate two 9 are both fixedly connected with a fixed block 22, the fixed block 22 is clamped with the fixed groove one 21, the positions of the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9 are more fixed and not easy to shift, the clamping of the fixed block 22 and the fixed groove one 21 increases a new constraint node on the basis of the original connection, these additional clamping nodes increase the number of connection points between the clamping plate and the reinforced column, limit the movement of the clamping plate from multiple dimensions, can keep the position stable even when bearing repeated load or vibration, further improve the stability of the overall connection; the center of the bottom of the fixed block 22 is provided with a buckle groove 23, the center of the bottom in the fixed groove one 21 is fixedly connected with a buckle block one 24, the buckle block one 24 is clamped with the buckle groove 23, the connection of the fixed block 22 and the fixed groove one 21 is more stable, the cooperation of the buckle block one 24 and the buckle groove 23 forms secondary locking in addition to the basic clamping, this design of "basic clamping + secondary locking" increases the locking level, so that after the fixed block 22 is embedded in the fixed groove one 21, it is not only constrained by the overall structure but also tightly engaged in details, which can effectively prevent the connection from falling off due to material fatigue, vibration and the like in long-term use; the center position of the one side front end of the L-shaped arc clamping plate one 8 arranged on one side and the rear end of the L-shaped arc clamping plate one 8 arranged on the other side are both provided with a fixed groove two 25, the center position of the one side rear end of the L-shaped arc clamping plate one 8 arranged on one side and the center position of the one side front side of the L-shaped arc clamping plate one 8 arranged on the other side are both fixedly connected with two arc-shaped buckle plates 27, the two arc-shaped buckle plates 27 are clamped with the fixed groove two 25, which can effectively prevent the L-shaped arc clamping plate one 8 from shifting under the action of lateral force, the lateral clamping of the arc-shaped buckle plate 27 and the fixed groove two 25 supplements the constraint from the horizontal direction, cooperates with the reinforcing structure in the longitudinal and transverse directions to form rigid constraint in the horizontal direction, resists the sliding of the clamping plate caused by lateral force, especially can ensure the stability of the clamping plate in all directions when encountering earthquakes, rock lateral extrusion and the like.

[0037] Embodiment four, referring to Figures 1-8 A construction method of a rotary drilling bored pile in a complex interactive boulder stratum, comprising the following steps:

[0038] S1, the bottom of the rotary digging hole is leveled and cleaned, the pile base 2 is fixed to the hole bottom through pre-embedded parts or grouting, and the horizontal stability is ensured; the vertical steel column 3 is inserted into the pile base 2 insertion hole, the verticality is fixed through temporary support, the vertical steel column 3 is installed at the designed interval, the cross structure is formed by installing the horizontal steel column 4 corresponding to the preset height, the sliding groove 10 is opened at the top and bottom of the horizontal steel column 4 and on both sides of the vertical steel column 3 after the position is calibrated, and the smoothness of the notch is ensured;

[0039] S2, the sliding blocks 11 of the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9 are aligned with the sliding grooves 10, and are pushed into the vertical steel column 3 along the support short rod 12; the position of the clamping plate is adjusted, the convex clamping block 14 of the L-shaped arc clamping plate one 8 is aligned with the convex clamping groove 13 of the vertical steel column 3 and is embedded, and it is checked whether the clamping is tight without gap;

[0040] S3, the two-way threaded reinforcing rod one 16 is inserted through the reinforcing groove one 15 of the L-shaped arc clamping plate two 9, the through hole of the horizontal steel column 4 and the reinforcing groove one 15 of the L-shaped arc clamping plate one 8, and the fixed nut one 17 is sleeved on the top and bottom thereof, and is symmetrically tightened to be attached with the clamping plate; the two-way threaded reinforcing rod two 19 is inserted through the clamping groove two 18 of one side clamping plate, the convex clamping block 14, the through hole of the vertical steel column 3 and the clamping groove two 18 of the other side clamping plate, and the fixed nut two 20 is sleeved on both sides, and is symmetrically tightened to lock the convex clamping block 14 and the convex clamping groove 13;

[0041] S4, the clamping state of all L-shaped arc clamping plates, the tightness of the reinforcing rods and the nuts are checked, and it is confirmed that there is no looseness through knocking or tension test; the annular steel bars 7 are welded between the vertical steel columns 3 and the upper and lower horizontal steel columns 4 at the designed interval on the outer side of the vertical steel columns 3, and the welding seam is ensured to be full and firm; the limiting frame 5 is sleeved on the top of the vertical steel column 3, is adjusted to be horizontal and is fixed to the top of the pile body 1, the limiting seat 6 is symmetrically fixed on both sides of the limiting frame 5, and the stable connection with the pile body or the surrounding structure is ensured, and the installation is completed.

[0042] The installation process of the cast-in-place pile is efficient and the connection quality of each part is reliable, the clear step division disassembles the originally complex assembly process into orderly operation stages, from the fixing of the pile base 2, the installation of the vertical steel column 3 and the horizontal steel column 4, to the clamping of the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9, the reinforcement of the two-way threaded reinforcing rod one 16 and the two-way threaded reinforcing rod two 19, and then to the welding of the annular steel bars 7, the installation of the limiting frame 5 and the limiting seat 6, the operation target of each stage is clear, workers can execute according to the steps without relying on high-precision equipment, operation mistakes are reduced and the construction period is shortened, and the stability of the construction quality in the complex stratum environment is ensured.

[0043] Working principle: Through the precise cooperation of each component, high-strength stable support in complex boulder stratum is realized. The bottom of the pile body 1 is fixedly connected with the pile base 2 to provide a bottom bearing foundation for the overall structure, the bottom of the vertical steel column 3 is inserted into the inside of the pile base 2 to realize longitudinal anchoring, and the vertical steel column 3 and the several transversely distributed horizontal steel columns 4 in the pile body 1 are crossed to form a longitudinal and transverse interlaced skeleton system, thereby constituting the main structure of bearing load. At each intersection of the vertical steel column 3 and the horizontal steel column 4, two L-shaped arc clamping plates one 8 and two L-shaped arc clamping plates two 9 are symmetrically arranged at the top and bottom, respectively. These L-shaped arc clamping plates slide along the sliding groove 10 on the surface of the horizontal steel column 4 through the sliding block 11 on one side of the L-shaped arc clamping plates, and the sliding process is guided and limited by the support short rod 12 in the sliding groove 10 to ensure the precise alignment of the clamping plate with the connection. After alignment, the convex clamping block 14 on the side of the L-shaped arc clamping plate one 8 close to the vertical steel column 3 is embedded in the corresponding convex clamping groove 13 of the vertical steel column 3, and the mutual engagement of the convex structures forms the first mechanical locking, and the L-shaped arc clamping plate one 8 and the L-shaped arc clamping plate two 9 form a ring-shaped wrapping at the top and bottom of the connection, greatly increasing the node contact area, so that the lateral pressure or seismic load can be evenly distributed to the horizontal and vertical steel columns through the clamping plate, avoiding the problem of easy loosening of traditional single-point connection.

[0044] The bidirectional threaded reinforcing rod one 16 penetrates the horizontal steel column 4 in the longitudinal direction and is embedded in the reinforcing groove one 15 on the side of the upper and lower L-shaped arc clamping plates one 8 and the L-shaped arc clamping plates two 9, and the bidirectional threaded design can simultaneously tighten the two ends to the center by rotating, and the fixed nut one 17 at the end further compresses the contact surface of the clamping plate and the horizontal steel column 4 to strengthen the longitudinal connection strength. The bidirectional threaded reinforcing rod two 19 penetrates the vertical steel column 3, the convex clamping block 14 and the reinforcing groove two 18 of the left and right L-shaped arc clamping plates in the transverse direction, and also tightens the two fixed nuts two 20 on both sides by the bidirectional threaded characteristics to lock the convex clamping block 14 more tightly in the convex clamping groove 13, forming transverse reinforcement. The two kinds of reinforcing rods and clamping structures together form a three-dimensional reinforcing system of "longitudinal tensioning + transverse locking", so that the node not only can resist vertical load, but also can effectively bear horizontal shear force and torsional moment, perfectly adapt to the complex stress environment caused by uneven rock distribution in complex interactive boulder stratum, ensure the stability of the overall structure in long-term use, and improve the bearing capacity and durability of the cast-in-place pile.

[0045] Finally, it should be noted that the above-described preferred embodiments of the present application are only for the purpose of illustrating the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A bored pile in a complex interlocking boulder formation, comprising a pile body (1), characterized in that: The bottom of the pile body (1) is fixedly connected to the pile base (2), the interior of the pile body (1) is fixedly connected to a plurality of horizontal steel bars (4), the interior of the pile body (1) is fixedly equipped with a plurality of vertical steel bars (3) at the top and bottom corresponding to the plurality of horizontal steel bars (4), and the bottom of the vertical steel bars (3) is plugged into the interior of the pile base (2); the top and bottom of the connection between the two vertical steel bars (3) and the horizontal steel bars (4) are respectively provided with two L-shaped arc clips (8) and two The L-shaped arc clamp plate 2 (9) is provided with a sliding groove (10) on the top and bottom of the surface of the horizontal steel bar column (4) corresponding to both sides of the vertical steel bar column (3). The opposite side of the L-shaped arc clamp plate 1 (8) and the L-shaped arc clamp plate 2 (9) corresponding to the side close to the horizontal steel bar column (4) are fixedly connected with a sliding block (11), and the sliding block (11) is slidably connected to the sliding groove (10); the opposite side of the two L-shaped arc clamp plates 1 (8) arranged on the left and right corresponds to the side close to the vertical steel bar column (3) and is fixedly connected. There is a convex clamping block (14), and convex clamping grooves (13) are provided on both sides of the surface of the vertical steel bar column (3) corresponding to the upper and lower sides of the horizontal steel bar column (4), and the convex clamping block (14) is clamped with the convex clamping groove (13); two L-shaped arc clamping plates (8) and two L-shaped arc clamping plates (9) arranged above and below are longitudinally provided with a reinforcement groove (15) at the side corresponding to the side close to the vertical steel bar column (3), and a bidirectional threaded reinforcement rod (15) is provided between the two longitudinal reinforcement grooves (15). (16), the center position of the bidirectional threaded reinforcement rod 1 (16) penetrates the horizontal steel bar column (4); the top position of the two L-shaped arc clamps 1 (8) on the opposite side and the bottom position of the two L-shaped arc clamps 2 (9) on the opposite side are both transversely provided with reinforcement grooves 2 (18), and a bidirectional threaded reinforcement rod 2 (19) is provided between the two transverse reinforcement grooves 2 (18), and the center position of the bidirectional threaded reinforcement rod 2 (19) penetrates the vertical steel bar column (3) and the two convex blocks (14).

2. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 1, characterized in that: The L-shaped arc card plate 1 (8) and the L-shaped arc card plate 2 (9) are symmetrically arranged. The two L-shaped arc card plates 1 (8) arranged on the left and right are symmetrically arranged. The two L-shaped arc card plates 2 (9) arranged on the left and right are symmetrically arranged.

3. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 1, characterized in that: The top and bottom of the bidirectional threaded reinforcing rod (16) are both threadedly connected with a fixing nut (17), and the opposite sides of the two fixing nuts (17) arranged above and below are respectively in contact with the opposite ends of the L-shaped arc clamp (8) and the L-shaped arc clamp (9); the two sides of the bidirectional threaded reinforcing rod (19) are both threadedly connected with a fixing nut (20), and the opposite sides of the four fixing nuts (20) arranged on the left and right are respectively in contact with the opposite ends of the two L-shaped arc clamps (8) and the opposite ends of the two L-shaped arc clamps (9).

4. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 1, characterized in that: A limiting frame (5) is fixedly assembled on the top of the pile body (1), the top of the vertical steel bar column (3) passes through the outside of the limiting frame (5), and both sides of the limiting frame (5) are fixedly connected to the limiting seat (6).

5. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 1, characterized in that: Annular steel bars (7) are welded between the outer sides of the plurality of vertical steel bar columns (3) and the corresponding upper and lower horizontal steel bar columns (4).

6. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 1, characterized in that: The opposite sides of the two upper and lower sliding blocks (11) respectively penetrate into the interior of the two sliding grooves (10). A supporting short rod (12) is fixedly connected to one side of the sliding groove (10). The supporting short rod (12) is sleeved and slidably connected to the sliding block (11).

7. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 1, characterized in that: A fixing groove 1 (21) is provided at a center position on the rear side of the bottom of the L-shaped arc clamping plate 1 (8) and a center position on the front side of the top of the L-shaped arc clamping plate 2 (9). A fixing block (22) is fixedly connected to the center position on the front side of the bottom of the L-shaped arc clamping plate 1 (8) and a center position on the rear side of the top of the L-shaped arc clamping plate 2 (9). The fixing block (22) is clamped with the fixing groove 1 (21).

8. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 7, characterized in that: A snap groove (23) is provided at the center of the bottom of the fixing block (22), and a snap block (24) is fixedly connected to the center of the bottom of the fixing groove (21), and the snap block (24) is snapped into the snap groove (23).

9. The rotary bored cast-in-place pile in complex alternating boulder formation according to claim 1, characterized in that: A fixing groove 2 (25) is provided at a center position of the front end of one side of the L-shaped arc clamping plate 1 (8) provided on one side and a rear end of one side of the L-shaped arc clamping plate 1 (8) provided on the other side. Two arc-shaped snap plates (27) are fixedly connected to a center position of the rear end of one side of the L-shaped arc clamping plate 1 (8) provided on one side and a center position of the front end of one side of the L-shaped arc clamping plate 1 (8) provided on the other side. The two arc-shaped snap plates (27) are snapped into the fixing groove 2 (25).

10. A method for constructing bored piles in complex interlocking boulder formations, characterized by: The following steps are involved: S1, level and clean the bottom of the rotary drilled hole, fix the pile base (2) to the bottom of the hole by embedded parts or grouting to ensure horizontal stability; insert the bottom of the vertical steel bar column (3) into the plug hole of the pile base (2), fix the verticality by temporary support, install the vertical steel bar column (3) according to the designed spacing, and then install the horizontal steel bar column (4) corresponding to the preset height to form a cross structure. After calibrating the position, open sliding grooves (10) on the top and bottom of the horizontal steel bar column (4) and on both sides of the corresponding vertical steel bar column (3) to ensure that the grooves are smooth; S2, align the sliding blocks (11) of the L-shaped arc clamping plate (8) and the L-shaped arc clamping plate (9) with the sliding grooves (10), and push them along the supporting short rod (12) until they are close to the vertical steel bar column (3); adjust the position of the clamping plate so that the convex clamping block (14) of the L-shaped arc clamping plate (8) is aligned with the convex clamping groove (13) of the vertical steel bar column (3) and insert it, and check whether the clamping is tight and there is no gap; S3, pass the bidirectional threaded reinforcing rod (16) through the reinforcing groove (15) of the L-shaped arc clamping plate (9), the through hole of the horizontal steel bar column (4) and the reinforcing groove (15) of the L-shaped arc clamping plate (8), respectively, and put the fixing nuts (17) on the top and bottom thereof, and tighten them symmetrically until they fit the clamping plate; pass the bidirectional threaded reinforcing rod (19) through the reinforcing groove (18) of the clamping plate on one side, the convex clamping block (14), the through hole of the vertical steel bar column (3) and the reinforcing groove (18) of the clamping plate on the other side, put the fixing nuts (20) on both sides, and tighten them symmetrically to lock the convex clamping block (14) and the convex clamping groove (13); S4, check the connection status of all L-shaped arc clips and the tightness of the connection of the reinforcement rods and nuts, and confirm that there is no looseness by knocking or tensile testing; weld the ring steel bars (7) at the designed spacing between the outer side of the vertical steel bar column (3) and the upper and lower horizontal steel bar columns (4) to ensure that the weld is full and firm; put the limit frame (5) on the top of the vertical steel bar column (3), adjust it to the horizontal level and fix it on the top of the pile body (1), and then symmetrically fix the limit seat (6) on both sides of the limit frame (5) to ensure a firm connection with the pile body or surrounding structure, and complete the installation.

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