Construction method of reinforcement cage of cast-in-place pile

Abstract

The application discloses a construction method of a reinforcement cage of a cast-in-situ bored pile, and comprises the following steps: marking a hole forming position in a foundation pit, and obtaining a first reference hole forming diameter and a second reference hole forming diameter according to the diameter of the reinforcement cage; forming a hole mouth section of the cast-in-situ bored pile according to the first reference hole forming diameter; forming a hole body section of the cast-in-situ bored pile according to the second reference hole forming diameter; placing the reinforcement cage into the hole body section, and forming a cast-in-situ limiting part at the hole mouth section, so that the cast-in-situ limiting part is connected with the end of the reinforcement cage; pouring concrete into the cast-in-situ bored pile, and completing the construction of the cast-in-situ bored pile. The method is characterized in that the reinforcement is planted on the inner side wall of the hole mouth section, the casing in the hole body section is utilized, the cast-in-situ concrete is poured between the casing and the inner side wall of the hole mouth section, the cast-in-situ limiting part is formed, the reinforcement cage in the cast-in-situ bored pile is prevented from floating, the forming quality of the cast-in-situ bored pile is improved, and the construction quality and the construction efficiency of the cast-in-situ bored pile are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the construction technology field of reinforcement cage of bored pile, and particularly relates to a construction method of reinforcement cage of bored pile. BACKGROUND

[0002] The bored pile refers to a pile formed by means of mechanical drilling, steel pipe soil extrusion or manpower excavation in the ground to form a pile hole, and placing a reinforcement cage and pouring concrete in the pile hole.

[0003] The reinforcement cage mainly plays a role in resisting tension, and the compressive strength of concrete is high but the tensile strength is very low. The reinforcement cage plays a role in restraining the pile body concrete, so that the pile body concrete can bear a certain axial tension. The reinforcement structure of the bored pile, the hole digging pile and the column is called the reinforcement cage.

[0004] In the actual construction process of the bored pile, the reinforcement cage floating is one of common quality problems of the bored pile. The reasons for the reinforcement cage floating are various, for example, the pouring speed and intermittent time of the concrete are too long, the flowability of the concrete is reduced, the cohesion is increased, the friction force of the reinforcement cage is increased, and the reinforcement cage is caused to float; due to the deflection of the drilling, when the guide pipe is pulled out, the guide pipe is easily hung on the reinforcement cage, the reinforcement cage is caused to displace upward, and the reinforcement cage is caused to float.

[0005] In the related art, due to the different construction experience of the construction workers, the flowability and the upward speed of the concrete, the mutual position of the bottom of the guide pipe and the bottom end of the reinforcement cage and the common buried depth of the guide pipe and the reinforcement cage in the concrete are difficult to control, the reinforcement cage in the bored pile is easily caused to float, when the reinforcement cage floats, the overall bearing capacity of the bored pile is affected, the designed load cannot be effectively borne, and the quality hidden danger exists, therefore, a construction method of the reinforcement cage of the bored pile is required to prevent the reinforcement cage of the bored pile from floating. SUMMARY

[0006] The main purpose of the present application is to provide a construction method of the reinforcement cage of the bored pile, which aims to solve the technical problem in the prior art that due to the different construction experience of the construction workers, the flowability and the upward speed of the concrete, the mutual position of the bottom of the guide pipe and the bottom end of the reinforcement cage and the common buried depth of the guide pipe and the reinforcement cage in the concrete are difficult to control, when the reinforcement cage floats, the overall bearing capacity of the bored pile is affected, the designed load cannot be effectively borne, and the quality hidden danger exists, therefore, a construction method of the reinforcement cage of the bored pile is required to prevent the reinforcement cage of the bored pile from floating.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows.

[0008] The application provides a construction method of a reinforcement cage of a cast-in-place bored pile, and the method comprises the following steps:

[0009] Marking a hole-forming position in a foundation pit, and obtaining a diameter of the reinforcement cage;

[0010] According to the diameter of the reinforcement cage, a first reference hole-forming diameter and a second reference hole-forming diameter are obtained; wherein the first reference hole-forming diameter is greater than the second reference hole-forming diameter;

[0011] According to the first reference hole-forming diameter, the hole-forming position is drilled to form a hole mouth section of the cast-in-place bored pile;

[0012] According to the second reference hole-forming diameter, the hole-forming position is drilled again in the hole mouth section to form a hole body section of the cast-in-place bored pile;

[0013] The reinforcement cage is placed into the hole body section of the cast-in-place bored pile, so that the end of the reinforcement cage is exposed from the hole body section of the cast-in-place bored pile to the hole mouth section;

[0014] A cast-in-place limiting member is formed in the hole mouth section, so that the cast-in-place limiting member is connected with the end of the reinforcement cage;

[0015] Concrete is poured into the cast-in-place bored pile to complete the construction of the cast-in-place bored pile.

[0016] Optionally, in the construction method of the reinforcement cage of the cast-in-place bored pile, the step of drilling the hole-forming position again in the hole mouth section according to the second reference hole-forming diameter to form the hole body section of the cast-in-place bored pile comprises the following steps:

[0017] According to the second reference hole-forming diameter, rotary digging is performed on the hole-forming position in the hole mouth section;

[0018] During the rotary digging, a protection cylinder is lowered into an initial hole body section formed by the rotary digging; wherein a first annular space is formed between one side of the protection cylinder exposed from the hole body section and an inner side wall of the hole mouth section;

[0019] A bottom section cast-in-place limiting ring is formed in the first annular space;

[0020] The protection cylinder is removed to form the hole body section of the cast-in-place bored pile.

[0021] Optionally, in the construction method of the reinforcement cage of the cast-in-place bored pile, the step of forming the cast-in-place limiting member in the hole mouth section so that the cast-in-place limiting member is connected with the end of the reinforcement cage comprises the following steps:

[0022] The reinforcement cage is lowered into the hole body section of the cast-in-place bored pile, so that the end of the reinforcement cage extends from the top of the bottom section cast-in-place limiting ring;

[0023] A bottom section cast-in-place limiting ring is formed in the second annular space between the top of the bottom section cast-in-place limiting ring and the top of the hole section;

[0024] A top section cast-in-place limiting ring is formed in the second annular space to form the cast-in-place limiting member connected to the end of the reinforcement cage.

[0025] Optionally, in the method for constructing the reinforcement cage of the bored pile, the height of the second annular space is LA, the height of the end of the reinforcement cage extending from the top of the bottom section cast-in-place limiting ring is LB, and 2LB≤LA.

[0026] Optionally, in the method for constructing the reinforcement cage of the bored pile, the reinforcement cage includes a plurality of ends.

[0027] The cast-in-place limiting member includes:

[0028] A cast-in-place body in a ring structure, an inner ring of the cast-in-place body defines a pouring opening in communication with the hole body section of the bored pile, a plurality of insertion holes are formed vertically on the cast-in-place body, the insertion holes are arranged at intervals along the circumference of the cast-in-place body, and the number of the insertion holes is consistent with and corresponds to the number of the ends.

[0029] Optionally, in the method for constructing the reinforcement cage of the bored pile, the step of pouring concrete into the bored pile to complete the construction of the bored pile includes:

[0030] Inserting a concrete guide pipe from the pouring opening of the cast-in-place limiting member;

[0031] Pumping concrete from the concrete guide pipe into the hole body section of the bored pile by using a concrete pump;

[0032] Extracting the concrete guide pipe to complete the construction of the bored pile.

[0033] Optionally, in the method for constructing the reinforcement cage of the bored pile, the step of forming the cast-in-place limiting member in the hole section to connect the cast-in-place limiting member to the end of the reinforcement cage includes:

[0034] Planting a steel bar along the inner side wall of the hole section in the circumferential direction of the hole section to form a framework of the cast-in-place limiting member;

[0035] Forming the cast-in-place limiting member by supporting the framework and pouring concrete.

[0036] Optionally, in the method for constructing the reinforcement cage of the bored pile, the step of planting a steel bar along the inner side wall of the hole section in the circumferential direction of the hole section to form a framework of the cast-in-place limiting member includes:

[0037] a plurality of first straight steel bars with threads are implanted along the circumference of the hole section and on the inner side wall of the hole section; the plurality of first straight steel bars are arranged at intervals and are all arranged towards the center of the hole section;

[0038] a plurality of second straight steel bars with threads are implanted along the vertical direction on the bottom wall of the hole section; the second straight steel bars are arranged in consistent number and one-to-one correspondence with the first straight steel bars;

[0039] the overlapping parts of each first straight steel bar and the corresponding second straight steel bar are bound to form the framework of the cast-in-place limiting member.

[0040] Optionally, in the steel cage construction method of the bored pile, the first straight steel bar is implanted on the inner side wall of the hole section to a depth greater than or equal to 30 cm, and the length of the first straight steel bar exposed on the inner side wall of the hole section is H1, which is less than or equal to the interval between the inner side wall of the hole section and the hole body section of the bored pile.

[0041] Optionally, in the steel cage construction method of the bored pile, the second straight steel bar is implanted on the bottom wall of the hole section to a depth greater than or equal to 30 cm, and the length of the first straight steel bar exposed on the bottom wall of the hole section is H2, which is greater than or equal to the length of the steel cage exposed on the hole body section of the bored pile.

[0042] The above one or more technical solutions provided by the present application can have the following advantages or at least achieve the following technical effects:

[0043] The steel cage construction method of the bored pile provided by the present application forms the hole section and the hole body section of the bored pile at the hole forming position twice, and the diameter of the hole section is greater than that of the hole body section, so that the hole section is arranged around the outer periphery of the hole body section, the steel bars are implanted on the inner side wall of the hole section, and the cast-in-place concrete is poured between the casing in the hole body section and the inner side wall of the hole section to form the cast-in-place limiting member. The cast-in-place limiting member presses the steel cage in the bored pile downward, and limits the steel cage in the bored pile under the limitation of the steel bars implanted in the hole section. After the concrete is poured into the bored pile, the steel cage in the bored pile is prevented from floating up, the problem that the construction quality of the bored pile is difficult to control due to the experience difference of construction workers is avoided, the forming quality of the bored pile is improved, the overall bearing capacity of the bored pile is improved, the bored pile can effectively bear the design load, the safety hazard of the bored pile is reduced, and the construction quality and construction efficiency of the bored pile are improved. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative effort based on these drawings.

[0045] Figure 1 The flowchart of the reinforcing cage construction method of the cast-in-place bored pile of the present application;

[0046] Figure 2 The construction structure diagram of the reinforcing cage construction method of the cast-in-place bored pile of the present application;

[0047] Figure 3 The top view structure diagram of the cast-in-place limiting piece of the present application;

[0048] Figure 4 The front view structure diagram of the cast-in-place limiting piece of the present application.

[0049] Reference Name Reference Name 100 Reinforcement cage 200 Orifice section 210 First looping space 220 Second looping space 300 Bore section 400 Casing 500 Cast-in-place limiting piece 510 Junction 520 Pouring opening

[0050] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0052] It should be noted that,

[0053] In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indications also change accordingly.

[0054] In the present application, the terms "comprising" or "comprises", "include" or "including" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the statement "comprising" does not exclude the presence of additional identical elements in the process, method, article, or system that includes the element. In addition, the meaning of "and / or" appearing in the text throughout the text includes three parallel solutions, for example, "A and / or B" includes A solution, or B solution, or A and B solutions.

[0055] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing", and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements, or interaction relationship between two elements.

[0056] In the present application, if there is a description of "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features.

[0057] In the present application, the suffix such as "module", "component", "piece", "part", or "unit" used to represent an element is only for the convenience of description of the present application, and has no specific meaning. Therefore, "module", "part", or "unit" can be used mixedly.

[0058] For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to specific circumstances. In addition, the technical solutions of various embodiments can be combined with each other, but it is based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0059] The inventive concept of the present application is further illustrated below in conjunction with some specific embodiments.

[0060] The present application proposes a construction method of a reinforcement cage of a cast-in-place pile.

[0061] Reference is made to Figure 1 , Figure 2 , Figure 3 andFigure 4 , Figure 1 It is the flow chart of the construction method of the reinforcing cage of the bored pile of the application; Figure 2 It is the construction structure schematic view of the construction method of the reinforcing cage of the bored pile of the application; Figure 3 It is the top view structure schematic view of the cast-in-place limiting piece of the application; Figure 4 It is the front view structure schematic view of the cast-in-place limiting piece of the application.

[0062] In an embodiment of the application, as shown in Figures 1 to 4 A construction method of a reinforcing cage of a bored pile, the method comprising:

[0063] S100: marking a hole-forming position in a foundation pit, and obtaining a diameter of a reinforcing cage 100;

[0064] S200: obtaining a first reference hole-forming diameter and a second reference hole-forming diameter according to the diameter of the reinforcing cage 100; wherein the first reference hole-forming diameter is greater than the second reference hole-forming diameter;

[0065] S300: drilling the hole-forming position according to the first reference hole-forming diameter to form a hole mouth section 200 of the bored pile;

[0066] S400: drilling the hole-forming position again in the hole mouth section 200 according to the second reference hole-forming diameter to form a hole body section 300 of the bored pile;

[0067] S500: placing the reinforcing cage 100 into the hole body section 300 so that an end of the reinforcing cage 100 is exposed from the hole mouth section 200;

[0068] S600: forming a cast-in-place limiting piece 500 in the hole mouth section 200 so that the cast-in-place limiting piece 500 is connected with the end of the reinforcing cage 100;

[0069] S700: pouring concrete into the bored pile to complete the construction of the bored pile.

[0070] For the convenience of understanding, a specific embodiment is shown as follows:

[0071] According to the construction drawing, marking each hole-forming position in the construction operation surface of the foundation pit, and obtaining the diameter R1 of the reinforcing cage 100 according to the specification requirements and construction requirements;

[0072] wherein the first reference hole-forming diameter is R2, the second reference hole-forming diameter is R3, R3=R1+100mm, and R2=R1+P, 600mm≤P≤900mm;

[0073] After the hole mouth section 200 and the hole body section 300 of the bored pile are formed according to the first reference pore-forming diameter and the second reference pore-forming diameter respectively, the bottom wall of the hole mouth section 200 is communicated with the top end of the hole body section 300 of the bored pile, and an annular soil area is formed between the bottom wall of the hole mouth section 200 and the top end of the hole body section 300 of the bored pile, which is the area where the cast-in-place limiting piece 500 is formed;

[0074] After the steel reinforcement cage 100 is placed in the hole body section 300 of the bored pile, the end of the steel reinforcement cage 100 is exposed from the hole mouth section 200 of the bored pile, that is, the end of the steel reinforcement cage 100 extends out of the hole body section 300 from the communication between the hole body section 300 and the hole mouth section 200, and the end of the steel reinforcement cage 100 is located in the hole mouth section 200;

[0075] The annular soil area between the bottom wall of the hole mouth section 200 and the top end of the hole body section 300 of the bored pile is supported and molded, and the cast-in-place limiting piece 500 connected with the end of the steel reinforcement cage 100 is formed by pouring concrete;

[0076] After the cast-in-place limiting piece 500 is poured into the bored pile to pour concrete, the construction of the bored pile is completed.

[0077] As a preferred embodiment of the present application, the step of forming the cast-in-place limiting piece 500 connected with the end of the steel reinforcement cage 100 in the hole mouth section 200 includes:

[0078] S610: planting steel bars along the circumferential direction of the hole mouth section 200 to form a framework of the cast-in-place limiting piece 500; the cast-in-place limiting piece 500 is limited in the hole mouth section 200 by using the framework, so as to prevent the excessive settlement of the steel reinforcement cage 100 in the hole body section 300 of the bored pile caused by the self-weight of the cast-in-place limiting piece 500, and ensure the construction quality of the bored pile.

[0079] S620: supporting the framework and pouring concrete to form the cast-in-place limiting piece 500.

[0080] Specifically, the step of planting steel bars along the circumferential direction of the hole mouth section 200 to form the framework of the cast-in-place limiting piece 500 includes:

[0081] S611: planting a plurality of first straight steel bars with threads into the inner side wall of the hole mouth section 200 along the circumferential direction of the hole mouth section 200; the plurality of first straight steel bars are arranged at intervals and all face the center of the hole mouth section 200;

[0082] S612: implanting a plurality of second straight steel bars with threads along the vertical direction at the bottom wall of the hole section 200; the second straight steel bars are arranged in one-to-one correspondence with the first straight steel bars;

[0083] S613: binding the overlapping parts of the first straight steel bars and the corresponding second straight steel bars to form the framework of the cast-in-place limiting part 500.

[0084] In order to ensure the structural stability of the first straight steel bars, when the reinforcement cage 100 in the hole body section 300 of the cast-in-situ bored pile tends to float upward, the framework formed by the first straight steel bars can provide reliable lateral support for the cast-in-place limiting part 500, preventing the cast-in-place limiting part 500 from being squeezed out of the top end of the hole section 200 by the reinforcement cage 100 and losing the limiting effect, and the depth of the first straight steel bars implanted in the inner side wall of the hole section 200 is greater than or equal to 30 cm.

[0085] In order to prevent the end of the first straight steel bar away from the inner wall of the hole section 200 from blocking the construction process of placing the reinforcement cage 100 into the hole body section 300 of the cast-in-situ bored pile, the length of the first straight steel bar exposed to the inner side wall of the hole section 200 is H1, which is less than or equal to the distance between the inner side wall of the hole section 200 and the hole body section 300 of the cast-in-situ bored pile.

[0086] In addition, in order to prevent the cast-in-place part from pressing the reinforcement cage 100 into the bottom wall of the hole body section 300 of the cast-in-situ bored pile, resulting in the length of the reinforcement cage 100 exposed to the hole mouth of the hole body section 300 of the cast-in-situ bored pile being much smaller than the design specification requirement, therefore, the depth of the second straight steel bar implanted in the bottom wall of the hole section 200 is greater than or equal to 30 cm, and the length of the first straight steel bar exposed to the bottom wall of the hole section 200 is H2, which is greater than or equal to the length of the reinforcement cage 100 exposed to the hole body section 300 of the cast-in-situ bored pile, preventing the cast-in-place limiting part 500 from pressing the reinforcement cage 100, avoiding the settlement of the reinforcement cage 100 due to the pressure of the cast-in-place limiting part 500, and further improving the construction and forming quality of the cast-in-situ bored pile.

[0087] The technical scheme of the present application forms the hole mouth section 200 and the hole body section 300 of the bored pile in two times respectively at the hole forming position, and the diameter of the hole mouth section 200 of the bored pile is greater than the diameter of the hole body section 300, so that the hole mouth section 200 is arranged around the outer periphery of the hole body section 300, the rebars are planted on the inner side wall of the hole mouth section 200, and the casing 400 in the hole body section 300 is used to pour cast-in-place concrete between the casing 400 and the inner side wall of the hole mouth section 200 to form the cast-in-place limiting piece 500, the cast-in-place limiting piece 500 presses down the steel reinforcement cage 100 in the bored pile, and limits the steel reinforcement cage 100 in the bored pile under the limitation of the rebars planted in the hole mouth section 200, so that the concrete is poured into the bored pile, thereby avoiding the floating of the steel reinforcement cage 100 in the bored pile and the problem that the construction quality of the bored pile is difficult to control due to the experience difference of construction workers, improving the forming quality of the bored pile, improving the overall bearing capacity of the bored pile, enabling the bored pile to effectively bear the design load, reducing the safety hazard of the bored pile, and improving the construction quality and construction efficiency of the bored pile.

[0088] In an embodiment, the step of forming the hole body section 300 of the bored pile again by drilling at the hole forming position according to the second reference hole forming diameter in the hole mouth section 200 comprises:

[0089] S410: drilling at the hole forming position according to the second reference hole forming diameter in the hole mouth section 200;

[0090] S420: during the drilling, the casing 400 is lowered into the initial hole body section 300 formed by the drilling; wherein the casing 400 forms a first annular space 210 between the side of the hole body section 300 exposed to the outside and the inner side wall of the hole mouth section 200;

[0091] S430: forming a bottom section cast-in-place limiting ring in the first annular space 210;

[0092] S440: removing the casing 400 to form the hole body section 300 of the bored pile.

[0093] In the common knowledge of those skilled in the art, the casing 400 can prevent the inner side wall of the hole body section 300 of the bored pile from collapsing during the drilling, but in step S420, the casing 400 is used as a pouring side formwork of the bottom section cast-in-place limiting ring, the outer side wall of the casing 400 and the inner side wall of the hole mouth section 200 are used as the pouring formwork of the bottom section cast-in-place limiting ring, and the bottom section cast-in-place limiting ring is poured to form the cast-in-place limiting piece 500 that limits and prevents the floating of the steel reinforcement cage 100.

[0094] In an embodiment, the step of forming the cast-in-place limiting piece 500 in the hole mouth section 200 so that the cast-in-place limiting piece 500 is connected to the end of the steel reinforcement cage 100 comprises:

[0095] S601: Lower the reinforcement cage 100 into the hole body section 300 of the cast-in-place bored pile, so that the end of the reinforcement cage 100 extends from the top of the bottom cast-in-place limiting ring;

[0096] S602: Use the bottom cast-in-place limiting ring to form a second ring space 220 between the top of the bottom cast-in-place limiting ring and the top of the hole opening section 200;

[0097] S603: Form a top cast-in-place limiting ring in the second ring space 220 to form a cast-in-place limiting member 500 connected to the end of the reinforcement cage 100.

[0098] Specifically, in order to facilitate the removal of the casing 400 before pouring the hole body section 300 of the cast-in-place bored pile, so as to facilitate the repeated use of the casing 400, after the bottom cast-in-place limiting ring is formed, the casing 400 is removed, and the formwork box body is formed again on the bottom cast-in-place limiting ring, which is matched with the first ring space 210 of the reinforcement cage 100 and the hole opening section 200, and the concrete is poured into the formwork box body matched with the first ring space 210 of the reinforcement cage 100 and the hole opening section 200, to form a top cast-in-place limiting ring connected to the bottom cast-in-place limiting ring. After the top cast-in-place limiting ring is formed, the formed cast-in-place limiting member 500 is obtained.

[0099] In an embodiment, in order to make the end of the reinforcement cage 100 have sufficient length to be inserted into the cast-in-place limiting member 500, the connection range between the reinforcement cage 100 and the cast-in-place limiting member 500 is improved, thereby improving the stability of the reinforcement cage 100, the height of the second ring space 220 is LA, the height of the end of the reinforcement cage 100 extending from the top of the bottom cast-in-place limiting ring is LB, and 2LB≤LA.

[0100] In an embodiment, the reinforcement cage 100 includes a plurality of ends;

[0101] The cast-in-place limiting member 500 includes:

[0102] The cast-in-place body in a ring structure, the inner ring of the cast-in-place body defines a pouring opening 520 in communication with the hole body section 300 of the cast-in-place bored pile, and a plurality of insertion holes 510 are formed on the cast-in-place body in the vertical direction, the plurality of insertion holes 510 are arranged at intervals along the circumference of the cast-in-place body, and the number of the insertion holes 510 is consistent with and one-to-one corresponds to the number of the ends.

[0103] Specifically, since the end of the reinforcement cage 100 is inserted into the cast-in-place limiting member 500, the cast-in-place limiting member 500 abuts against the stirrup near the end of the reinforcement cage 100, thereby preventing the reinforcement cage 100 from floating after pouring the concrete.

[0104] In an embodiment, the concrete is poured into the cast-in-place pile, and the steps for completing the construction of the cast-in-place pile include:

[0105] S710: inserting the concrete pipe from the pouring opening 520 of the cast-in-place limiting piece 500;

[0106] S720: pumping the concrete from the concrete pipe into the hole body section 300 of the cast-in-place pile by using the concrete pump;

[0107] S730: extracting the concrete pipe to complete the construction of the cast-in-place pile.

[0108] Since the concrete pipe is inserted into the hole body section 300 of the cast-in-place pile from the pouring opening 520 of the cast-in-place limiting piece 500, the inner wall of the cast-in-place limiting piece 500 provides a fulcrum for the concrete pipe, preventing the concrete pipe from hooking the reinforcement cage 100 during the process of lowering into the hole body section 300 of the cast-in-place pile, facilitating the subsequent extraction of the concrete pipe, and preventing the reinforcement cage 100 from floating up due to the concrete pipe hooking the reinforcement cage 100.

[0109] It should be noted that the above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above embodiments are only optional embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent flow conversion within the scope of the present application, or direct or indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A method for constructing a reinforcing cage for a bored cast-in-place pile, characterized in that, The method includes: Mark the drilling locations in the foundation pit and obtain the diameter of the reinforcing cage; Based on the diameter of the reinforcing cage, a first reference hole diameter and a second reference hole diameter are obtained; wherein, the first reference hole diameter is larger than the second reference hole diameter; Drilling is performed at the hole location according to the first reference hole diameter to form the hole opening section of the bored pile; According to the second reference borehole diameter, the borehole is drilled again at the borehole opening section to form the borehole body section of the bored pile; The reinforcing cage is placed inside the borehole section of the bored pile so that the end of the reinforcing cage protrudes from the borehole section of the bored pile into the borehole opening section. A cast-in-place limiting member is constructed at the borehole opening to connect the cast-in-place limiting member to the end of the reinforcing cage; concrete is then poured into the bored pile to complete the construction of the bored pile. The step of drilling again at the borehole opening section according to the second reference borehole diameter to form the borehole body section of the bored pile includes: Based on the second reference borehole diameter, rotary drilling is performed on the borehole location at the borehole opening section; During rotary drilling, a casing is lowered into the initial hole section formed by rotary drilling; wherein, the casing protrudes from one side of the hole section and forms a first annular space between it and the inner wall of the hole opening section; In the first annular space, a bottom section cast-in-place limiting ring is formed; the casing is removed to form the borehole section of the bored pile; The step of constructing a cast-in-place limiting member at the orifice section to connect the cast-in-place limiting member to the end of the reinforcing cage includes: The reinforcing cage is lowered into the borehole section of the bored pile so that the end of the reinforcing cage extends from the top of the bottom section cast-in-place limiting ring; Using the bottom section cast-in-place limiting ring, formwork is erected between the top of the bottom section cast-in-place limiting ring and the top of the orifice section to form a second ring-forming space; A top section of cast-in-place limiting ring is formed in the second annular space to form the cast-in-place limiting member that is connected to the end of the reinforcing cage; The steel cage includes multiple ends; The cast-in-place limiting component includes: The cast-in-place body has a ring-shaped structure. The inner ring of the cast-in-place body defines a grouting port that communicates with the borehole section of the bored pile. Multiple insertion holes are formed vertically on the cast-in-place body. The multiple insertion holes are spaced apart along the circumference of the cast-in-place body. The number of insertion holes is the same as that of the end and they are arranged in a one-to-one correspondence.

2. The method for constructing the reinforcing cage of a bored pile as described in claim 1, characterized in that, The height of the second annular space is LA, and the height of the end of the steel cage extending from the top of the bottom cast-in-place limiting ring is LB, where 2LB≤LA.

3. The method for constructing the reinforcing cage of a bored pile as described in claim 1, characterized in that, The steps of injecting concrete into the bored pile to complete the construction of the bored pile include: Insert the concrete guide pipe through the injection port of the cast-in-place limiting member; Concrete is pumped from the concrete duct into the borehole section of the bored pile using a concrete pump. The concrete guide pipe is then removed to complete the construction of the bored pile.

4. The method for constructing the reinforcing cage of a bored pile as described in any one of claims 1 to 3, characterized in that, The step of constructing a cast-in-place limiting member at the orifice section to connect the cast-in-place limiting member to the end of the reinforcing cage includes: Reinforcing bars are installed along the circumference of the orifice section to form the skeleton of the cast-in-place limiting component; the skeleton is then supported by formwork and concrete is poured to form the cast-in-place limiting component.

5. The method for constructing the reinforcing cage of a bored pile as described in claim 4, characterized in that, The step of reinforcing the inner wall of the orifice segment along the circumference of the orifice segment to form the skeleton of the cast-in-place limiting member includes: Multiple threaded first straight steel bars are inserted into the inner wall of the orifice section along the circumference of the orifice section; the multiple first straight steel bars are spaced apart and all face the center of the orifice section. Multiple threaded second straight steel bars are inserted vertically into the bottom wall of the orifice section; the number of the second straight steel bars is the same as that of the first straight steel bars and they are arranged in a one-to-one correspondence. The lap joints of the first straight steel bars and the corresponding second straight steel bars are tied to form the skeleton of the cast-in-place limiting member.

6. The method for constructing the reinforcing cage of a bored pile as described in claim 5, characterized in that, The depth to which the first straight reinforcing bar is inserted into the inner wall of the borehole section is greater than or equal to 30 cm, and the length of the first straight reinforcing bar protruding from the inner wall of the borehole section is H1, which is less than or equal to the distance between the inner wall of the borehole section and the borehole body of the bored pile.

7. The method for constructing the reinforcing cage of a bored pile as described in claim 6, characterized in that, The depth to which the second straight reinforcing bar is inserted into the bottom wall of the borehole section is greater than or equal to 30 cm, and the length of the first straight reinforcing bar protruding from the bottom wall of the borehole section is H2, which is greater than or equal to the length of the reinforcing cage protruding from the borehole section of the bored pile.

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