Positioning device for pile foundation steel reinforcement cage and steel pipe column in deep foundation pit and its construction method

Abstract

The present invention discloses a positioning device for the pile cage and steel pipe column of a deep foundation pit and its construction method. The positioning unit is composed of multiple unit sections, which is convenient for installation and storage, and can meet the positioning and installation of pile cages and steel columns of various diameters. The positioning device for the pile cage and steel pipe column of the deep foundation pit of the present invention is installed in sections, and additional sections are installed when the foundation pit is relatively deep, the pile foundation, and the empty pile are relatively long, which can ensure the verticality of the steel cage and steel pipe column at different lowering depths, effectively ensuring the construction quality of the pile foundation. Its structure is simple, easy to use, and simple to install. The present invention solves the problems of cumbersome positioning and difficult verticality control when the pile cage or steel pipe column of the existing deep foundation pit is lowered into the pile hole.

Description

Technical Field

[0001] The present invention relates to the technical field, and particularly to a positioning device for a pile cage and a steel pipe column in a deep foundation pit and a construction method thereof. Background Art

[0002] At present, with the economic development, there are more and more high-rise buildings. The pile foundation construction is particularly important. The number of basement floors is large and the foundation pit is deep. The pile cage and the empty pile are also relatively long. Multi-channel cross braces are mostly used in deep foundation pits, and the cross braces are mostly supported by steel columns. In the case of a long empty pile, the verticality control of the steel column and the pile cage is particularly important, which is related to the pile foundation quality and the structural quality. When the existing pile cage or steel pipe column of the deep foundation pit is lowered into the pile hole, the positioning is cumbersome and the verticality adjustment is difficult.

[0003] The information disclosed in this background art section is only for enhancing the understanding of the general background of the present invention and should not be taken as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0004] To overcome the defects existing in the prior art, there is provided a positioning device for a pile cage and a steel pipe column in a deep foundation pit and a construction method thereof, so as to solve the problems that when the existing pile cage or steel pipe column of the deep foundation pit is lowered into the pile hole, the positioning is cumbersome and the verticality adjustment is difficult.

[0005] To achieve the above object, there is provided a positioning device for a pile cage and a steel pipe column in a deep foundation pit, including at least three positioning units detachably installed on the inner wall of a casing in a pile hole. The plurality of positioning units are spaced apart along the circumferential direction of the pile hole. A positioning space for inserting a pile cage or a steel pipe column is formed by enclosing between the plurality of positioning units. Each positioning unit includes a plurality of unit sections vertically arranged and detachably connected end to end. The upper unit section of the positioning unit abuts against the inner wall of the casing in the pile hole. A locking assembly for locking the casing is detachably installed on the upper unit section of the positioning unit. The unit section includes:

[0006] A vertically arranged supporting rib, and the locking assembly is detachably installed on a supporting rib at the top of the unit section;

[0007] A pressing vertical pipe arranged on the side of the supporting rib away from the inner wall. The positioning space is formed between the pressing vertical pipes of the plurality of positioning units;

[0008] At least two top support assemblies arranged along the axial direction of the supporting rib, the top support assembly including a hinged arm and an adjusting strut, one end of the hinged arm being pivotally mounted on the supporting rib, the other end of the hinged arm being pivotally mounted on the pressing vertical pipe, the adjusting strut having an upper end and a lower end opposite to each other, the upper end of the adjusting strut being pivotally mounted on the middle part of the hinged arm, the lower end of the adjusting strut being arranged obliquely downward and outward of the pile hole, a plurality of socket blind holes arranged along the axial direction of the supporting rib being formed on the side wall of the supporting rib, the socket blind holes being arranged below the hinged arm and being arranged obliquely upward and inward of the pile hole, and the lower end of the adjusting strut being detachably inserted into one of the socket blind holes.

[0009] Further, the top support assembly further includes a tension spring, the tension spring being connected between the supporting rib and the adjusting strut.

[0010] Further, one end of the hinged arm is pivotally connected to the side wall of the supporting rib, and the other end of the hinged arm is pivotally connected to the circumferential surface of the pressing vertical pipe.

[0011] Further, the width of the hinged arm gradually becomes smaller from the middle part of the hinged arm to both ends of the hinged arm.

[0012] Further, a plurality of strip-shaped vertical holes are formed on the side wall of the pressing vertical pipe away from the supporting rib, a vertically arranged guiding roller is installed inside the pressing vertical pipe, one side of the guiding roller penetrates through the strip-shaped vertical hole, a limiting groove for embedding the outside of the vertical main reinforcement of the steel reinforcement cage is formed on the circumferential surface of the guiding roller, and the limiting groove is arranged in a circle along the circumferential direction of the guiding roller.

[0013] Further, the locking assembly includes:

[0014] A hook, which is hung on the upper part of the side wall of the casing, and the supporting rib of the upper unit section of the positioning unit is detachably connected to the hook;

[0015] A locking member, a perforation is formed on the hook, the locking member is adjustably installed in the perforation, and the locking member presses against the side wall of the casing.

[0016] Further, the perforation is a threaded hole, the locking member is formed with an external thread, and the locking member is screwed into the perforation.

[0017] The present invention provides a construction method for a positioning device of a pile foundation steel reinforcement cage and a steel pipe column in a deep foundation pit, including the following steps:

[0018] Detachably install at least three positioning units on the inner wall of the casing in the pile hole;

[0019] By adjusting the position of the socket blind hole into which the lower end of the adjusting strut of the unit section of the positioning unit is inserted, the distance between the pressure-bearing vertical pipes of the unit sections of the plurality of positioning units and the inner wall of the casing is made equal, so that a positioning space for inserting a steel reinforcement cage or a steel pipe column is formed by enclosing among the plurality of positioning units;

[0020] As the depth of the pile hole increases, the upper unit section of the installed positioning unit is lengthened so that the height of the positioning unit is adapted to the depth of the pile hole;

[0021] After the depth of the pile hole reaches the design elevation, hoist the steel reinforcement cage or the steel pipe column above the positioning space and lower it. The steel reinforcement cage or the steel pipe column is inserted into the positioning space, and the pressure-bearing vertical pipes of the unit sections of the positioning unit press against the outer side of the steel reinforcement cage or the steel pipe column, so that the steel reinforcement cage or the steel pipe column is coaxially arranged in the pile hole.

[0022] The beneficial effects of the present invention are as follows. For the positioning device for the steel reinforcement cage and the steel pipe column of the pile foundation in the deep foundation pit of the present invention, when installing the steel reinforcement cage or the steel pipe column of the pile foundation in the pile hole, first install a plurality of positioning devices in the casing in the pile hole along the circumferential direction of the pile hole. Based on the designed distance between the steel reinforcement cage or the steel pipe column and the hole wall of the pile hole, by flipping the hinge arm, the distance between the side of the pressure-bearing vertical pipe away from the casing and the hole wall of the pile hole is adapted to the designed distance. When lowering the steel reinforcement cage or the steel pipe column, the steel reinforcement cage or the steel pipe column is just inserted into the positioning space formed by enclosing a plurality of pressure-bearing vertical pipes, and the steel reinforcement cage or the steel pipe column inserted into the positioning space is also just coaxially arranged in the pile hole. The positioning device for the steel reinforcement cage and the steel pipe column of the pile foundation in the deep foundation pit of the present invention greatly improves the stability and verticality when lowering the steel reinforcement cage or the steel pipe column, and thus improves the accuracy in construction. The positioning unit of the positioning device for the steel reinforcement cage and the steel pipe column of the pile foundation in the deep foundation pit of the present invention is composed of a plurality of unit sections, which is convenient for installation and storage, and meets the positioning installation of steel reinforcement cages and steel columns of various pile diameters. The positioning device for the steel reinforcement cage and the steel pipe column of the pile foundation in the deep foundation pit of the present invention is installed in sections, and when the foundation pit is relatively deep, the pile foundation and the empty pile are relatively long, additional sections are installed, which can ensure the verticality of the steel reinforcement cage and the steel pipe column at different lowering depths, effectively ensuring the quality of pile foundation construction. Its structure is simple, easy to use, and easy to install, and it is particularly suitable for popularization and application in this field, and its market prospect is very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a schematic structural diagram of the positioning device for the steel reinforcement cage and the steel pipe column of the pile foundation in the deep foundation pit of the embodiment of the present invention.

[0025] Figure 2 It is a schematic structural diagram of a unit section of an embodiment of the present invention.

[0026] Figure 3 It is a schematic structural diagram of the upper part of the positioning unit of an embodiment of the present invention.

[0027] Figure 4 is Figure 3 A partial enlarged schematic diagram at position b in

[0028] Figure 5 It is a schematic structural diagram of the locking component of an embodiment of the present invention. Detailed implementation manners

[0029] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0031] Referring to Figures 1 to 5 As shown, the present invention provides a positioning device for a pile cage and a steel pipe column in a deep foundation pit, including at least three positioning units A.

[0032] At least three positioning units A are detachably installed on the inner wall of the casing C in the pile hole. The plurality of positioning units A are arranged at intervals along the circumferential direction of the pile hole. In this embodiment, at least three positioning units A are arranged at equal intervals. A positioning space for inserting the steel cage or the steel pipe column B is formed by enclosing among the plurality of positioning units A.

[0033] The positioning unit A includes a plurality of unit sections a that are vertically arranged and detachably connected end to end. The upper unit section a of the positioning unit A abuts against the inner wall of the casing C in the pile hole, and a locking component 21 for locking the casing C is detachably installed on the upper unit section a of the positioning unit A.

[0034] Specifically, each unit section a includes: a supporting rib 1, a pressing vertical pipe 2, and a jacking component 3.

[0035] Among them, the supporting rib 1 is vertically arranged. The locking component 21 is detachably installed on one of the supporting ribs 1 at the top of the unit section a.

[0036] The pressing vertical pipe 2 is arranged on the side of the supporting rib 1 away from the inner wall. A positioning space is formed among the pressing vertical pipes 2 of the plurality of positioning units A.

[0037] The number of the top support assemblies 3 is at least two. The two top support assemblies are arranged along the axial direction of the supporting rib.

[0038] Specifically, the top support assembly 3 includes a hinged arm 31 and an adjusting strut 32. One end of the hinged arm 31 is rotatably mounted on the supporting rib 1.

[0039] The other end of the hinged arm 31 is rotatably mounted on the pressing vertical pipe 2. The adjusting strut 32 has an upper end and a lower end which are opposite to each other.

[0040] The upper end of the adjusting strut 32 is rotatably mounted on the middle part of the hinged arm 31; the lower end of the adjusting strut 32 is arranged obliquely downward and outward of the pile hole.

[0041] A plurality of socket blind holes 10 are formed in the side wall of the supporting rib 1 along the axial direction of the supporting rib 1. The socket blind holes 10 are arranged below the hinged arm 31. Each socket blind hole 10 is arranged obliquely upward and inward of the pile hole. The lower end of the adjusting strut 32 is detachably inserted into a socket blind hole 10.

[0042] When installing the pile foundation reinforcement cage or the steel pipe column in the pile hole for the positioning device of the pile foundation reinforcement cage and the steel pipe column in the deep foundation pit of the present invention, first install a plurality of positioning devices in the casing in the pile hole along the circumferential direction of the pile hole. Based on the designed distance between the reinforcement cage or the steel pipe column and the hole wall of the pile hole, by flipping the hinged arm, the distance between the side of the pressing vertical pipe away from the casing and the hole wall of the pile hole is adapted to the designed distance. When lowering the reinforcement cage or the steel pipe column, the reinforcement cage or the steel pipe column is just inserted into the positioning space formed by enclosing a plurality of pressing vertical pipes, and the reinforcement cage or the steel pipe column inserted into the positioning space is also just coaxially arranged in the pile hole. The positioning device of the pile foundation reinforcement cage and the steel pipe column in the deep foundation pit of the present invention greatly improves the stability and verticality when lowering the reinforcement cage or the steel pipe column, and further improves the accuracy in construction.

[0043] The positioning unit of the positioning device of the pile foundation reinforcement cage and the steel pipe column in the deep foundation pit of the present invention is composed of a plurality of unit sections, which is convenient for installation and storage, and meets the positioning installation of pile foundation reinforcement cages and steel columns with various diameters. The positioning device of the pile foundation reinforcement cage and the steel pipe column in the deep foundation pit of the present invention is installed in sections, and additional sections are installed when the foundation pit is relatively deep, the pile foundation and the empty pile are relatively long, which can ensure the verticality of the reinforcement cage and the steel pipe column at different lowering depths, effectively ensuring the quality of pile foundation construction. Its structure is simple, easy to use and install, and is especially suitable for popularization and application in this field, and its market prospect is very broad.

[0044] Continue to refer to Figures 2 to 4, in this embodiment, the top support assembly 3 further includes a tie spring 33. The tie spring 33 is connected between the support rib 1 and the adjusting strut. Preferably, one end of the tie spring is connected to the middle of the adjusting strut. By using the tensile force of the tie spring, the lower end of the adjusting strut is stably inserted into the socket blind hole without being disturbed by other external forces.

[0045] As Figure 4 shown, a hole is provided at one end of the articulated arm close to the pressing vertical pipe. When adjusting the distance between the pressing vertical pipe and the support rib, the articulated arm is pulled through the hole, causing the articulated arm to turn up. At the same time, under the tensile force of the tie spring, the adjusting strut moves a distance of one socket blind hole and is then pulled into the socket blind hole by the tie spring.

[0046] In this embodiment, the support rib has two opposite side walls in the circumferential direction of the casing. One end of the articulated arm 31 is pivotally connected to one side wall of the support rib 1. The other end of the articulated arm 31 is pivotally connected to one side of the circumferential surface of the pressing vertical pipe 2.

[0047] As a preferred embodiment, the articulated arm is a curved arm and is in a shape similar to an L. Specifically, the width of the articulated arm 31 gradually decreases from the middle of the articulated arm 31 to both ends of the articulated arm 31.

[0048] In this embodiment, rollers are elastically installed on the pressing vertical pipe. A limiting groove is formed on the circumferential surface of the roller. The limiting groove is provided in a circle along the circumferential direction of the guiding roller 21. When lowering the steel reinforcement cage in the casing, the outside of a vertical steel bar of the steel reinforcement cage slides in the limiting groove.

[0049] Specifically, a plurality of strip-shaped vertical holes are provided on the side wall of the pressing vertical pipe 2 away from the support rib 1. A vertically arranged guiding roller 21 is installed inside the pressing vertical pipe 2. One side of the guiding roller 21 passes through the strip-shaped vertical hole. A limiting groove for embedding the outside of the vertical main reinforcement of the steel reinforcement cage is formed on the circumferential surface of the guiding roller 21. The guiding roller is coaxially connected with a horizontal wheel shaft. Sliding grooves are provided on the inner walls on both opposite sides of the pressing vertical pipe. Both ends of the horizontal wheel shaft slide in the sliding grooves.

[0050] Preferably, diagonal springs are connected between the inner wall of the pressing vertical pipe above and below the horizontal wheel shaft and the horizontal wheel shaft.

[0051] Refer to Figure 5 , the locking assembly 21 includes: a hook 211 and a locking member 212.

[0052] The hook 211 is hung on the upper part of the side wall of the casing C. The support rib 1 of the upper unit section a of the positioning unit A is detachably connected to the hook 211. The hook 211 is provided with a perforation. The locking member 212 is adjustably installed in the perforation. The locking member 212 presses against the side wall of the casing C.

[0053] As a preferred embodiment, the perforation is a threaded hole. The locking member 212 is formed with an external thread. The locking member 212 is screwed into the perforation.

[0054] In this embodiment, two adjacent supporting ribs up and down are detachably connected by bolts. The topmost supporting rib of the positioning unit is detachably connected to the hook by bolts. Both ends of the pressing vertical pipe are detachably connected by threads.

[0055] The present invention provides a construction method for a positioning device of a pile cage and a steel pipe column in a deep foundation pit, including the following steps:

[0056] S1: Detachably install at least three positioning units A on the inner wall of the casing C in the pile hole.

[0057] Hang the hook of the locking assembly on the upper end of the side wall of the casing, and then lock the hook on the casing through the locking member. The supporting ribs of multiple unit sections are adjacent end to end through bolts, and the topmost supporting rib is connected to the hook through bolts. Before installing the supporting ribs, adjust the position of the pressing vertical pipe based on the designed distance between the reinforcement cage or the steel pipe column and the inner wall of the pile hole. After adjusting the position of the pressing vertical pipe, install the supporting ribs on the hook.

[0058] S2: By adjusting the position of the socket blind hole 10 inserted by the lower end of the adjusting strut 32 of the unit section a of the positioning unit A, make the distances between the pressing vertical pipes 2 of the unit sections a of multiple positioning units A and the inner wall of the casing C equal, so that a positioning space for inserting the reinforcement cage or the steel pipe column B is formed by enclosing multiple positioning units A.

[0059] S3: As the depth of the pile hole increases, lengthen the upper unit section a of the installed positioning unit A so that the height of the positioning unit A is adapted to the depth of the pile hole.

[0060] Specifically, when lengthening the supporting ribs and the pressing vertical pipes, connect the lower end of a supporting rib to the supporting rib of the upper positioning section of the installed positioning unit through bolts, and then separate the hook from the supporting rib of the installed positioning unit and install it on the lengthened supporting rib.

[0061] Correspondingly, the pressing vertical pipe is screwed onto the pressing vertical pipe of the installed positioning unit through threads, and the lengthened pressing vertical pipe is connected to the lengthened pressing vertical pipe through the top support assembly.

[0062] S4: After the depth of the pile hole reaches the designed elevation, hoist the reinforcement cage or the steel pipe column B above the positioning space and lower it. The reinforcement cage or the steel pipe column B is inserted into the positioning space, and the pressing vertical pipe 2 of the unit section a of the positioning unit A presses against the outside of the reinforcement cage or the steel pipe column B, so that the reinforcement cage or the steel pipe column B is coaxially arranged in the pile hole.

[0063] The positioning device and construction method of the pile cage and steel pipe column for deep foundation pits of the present invention can accurately lower and install the pile cage and steel pipe column in place, ensure their verticality, and have a simple structure, convenient installation and disassembly, and effectively guarantee the quality of pile foundation construction.

[0064] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A positioning device for the pile cage and steel pipe column of a deep foundation pit, characterized in that At least three positioning units are included, which are detachably mounted on the inner wall of the casing inserted into the pile hole. A plurality of the positioning units are arranged at intervals along the circumferential direction of the pile hole. A positioning space for inserting a steel reinforcement cage or a steel pipe column is formed by enclosing among the plurality of positioning units. The positioning unit includes a plurality of unit sections which are vertically arranged and detachably connected end to end. The unit section at the upper part of the positioning unit abuts against the inner wall of the casing in the pile hole. A locking assembly for locking the casing is detachably mounted on the unit section at the upper part of the positioning unit. The unit section includes: A vertically arranged supporting rib, and the locking assembly is detachably mounted on one of the supporting ribs at the top of the unit section; A pressing vertical pipe, which is arranged on the side of the supporting rib away from the inner wall. The positioning space is formed among the pressing vertical pipes of the plurality of positioning units; At least two top support assemblies arranged along the axial direction of the supporting rib. The top support assembly includes a hinged arm and an adjusting strut. One end of the hinged arm is rotatably mounted on the supporting rib, and the other end of the hinged arm is rotatably mounted on the pressing vertical pipe. The adjusting strut has an upper end and a lower end which are opposite to each other. The upper end of the adjusting strut is rotatably mounted on the middle part of the hinged arm. The lower end of the adjusting strut is obliquely downward and arranged towards the outside of the pile hole. A plurality of socket blind holes are formed in the side wall of the supporting rib along the axial direction of the supporting rib. The socket blind holes are arranged below the hinged arm and obliquely upward and arranged towards the inside of the pile hole. The lower end of the adjusting strut is detachably inserted into one of the socket blind holes.

2. The positioning device for the pile foundation steel reinforcement cage and steel pipe column of the deep foundation pit according to claim 1, characterized in that, The top support assembly further includes a tension spring, and the tension spring is connected between the supporting rib and the adjusting strut.

3. The positioning device for the pile foundation steel reinforcement cage and steel pipe column of a deep foundation pit according to claim 1, characterized in that, One end of the hinged arm is pivotally connected to the side wall of the supporting rib, and the other end of the hinged arm is pivotally connected to the circumferential surface of the pressing vertical pipe.

4. The positioning device for the pile foundation steel reinforcement cage and steel pipe column of the deep foundation pit according to claim 3, characterized in that, The width of the hinged arm gradually becomes smaller from the middle part of the hinged arm to both ends of the hinged arm.

5. The positioning device for the pile foundation steel reinforcement cage and steel pipe column of the deep foundation pit according to claim 1, characterized in that, A plurality of strip-shaped vertical holes are formed in the side wall of the pressing vertical pipe away from the supporting rib. A vertically arranged guide roller is installed inside the pressing vertical pipe. One side of the guide roller penetrates through the strip-shaped vertical hole. A limiting groove for embedding the outside of the vertical main reinforcement of the steel reinforcement cage is formed on the circumferential surface of the guide roller, and the limiting groove is arranged in a circle along the circumferential direction of the guide roller.

6. The positioning device for the pile foundation steel reinforcement cage and steel pipe column of the deep foundation pit according to claim 1, characterized in that, The locking assembly includes: A hook, which is hung on the upper part of the side wall of the casing. The supporting rib of the unit section at the upper part of the positioning unit is detachably connected to the hook; A locking member, a perforation is formed in the hook, and the locking member is adjustably mounted in the perforation, and the locking member presses against the side wall of the casing.

7. The positioning device for the pile foundation steel reinforcement cage and steel pipe column of a deep foundation pit according to claim 6, characterized in that, The perforation is a threaded hole, the locking member is formed with an external thread, and the locking member is screwed into the perforation.

8. A construction method of a positioning device for a pile cage and a steel pipe column in a deep foundation pit as described in any one of claims 1 to 7, characterized in that, Including the following steps: Detachably mount at least three positioning units on the inner wall of the casing in the pile hole; By adjusting the position of the socket blind hole into which the lower end of the adjusting strut of the unit section of the positioning unit is inserted, the distances between the pressure-bearing vertical pipes of the unit sections of the plurality of positioning units and the inner wall of the casing are made equal, so that a positioning space for inserting a steel reinforcement cage or a steel pipe column is formed by enclosing among the plurality of positioning units; As the depth of the pile hole increases, the unit section at the upper part of the already installed positioning unit is lengthened so that the height of the positioning unit is adapted to the depth of the pile hole; After the depth of the pile hole reaches the design elevation, the steel reinforcement cage or the steel pipe column is hoisted above the positioning space and lowered, and the steel reinforcement cage or the steel pipe column is inserted into the positioning space. The pressure-bearing vertical pipes of the unit sections of the positioning unit press against the outer side of the steel reinforcement cage or the steel pipe column, so that the steel reinforcement cage or the steel pipe column is coaxially arranged in the pile hole.

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