Fabricated steel casing device

Abstract

The utility model relates to the technical field of cast-in-situ bored pile construction, and provides an assembly type steel casing device which comprises a plurality of first casing bodies and a connecting device, the connecting device comprises a plurality of first connecting structures and a plurality of second connecting structures, and the first connecting structures are arranged at the bottoms of the first casing bodies at intervals in the circumferential direction of the first casing bodies; and the second connecting structures are arranged at the top of the first barrel body in the circumferential direction of the first barrel body at intervals, and after the previous first barrel body is rotated, the first connecting structures and the second connecting structures of the adjacent first barrel bodies are suitable for being fixedly connected with each other, so that the first barrel bodies form the steel casing through the connecting device. The upper and lower adjacent first cylinder bodies are suitable for being connected in series through the first connecting structures and the second connecting structures, so that the steel casings with different depths can be arranged, and various construction quality problems caused by the fact that the steel casings are not placed in place during cast-in-situ bored pile construction are effectively solved; and the adjacent first casing bodies are detachably connected, so that the whole steel casing device is few in composition devices and simple and reliable in structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bored pile construction technology, further relates to a kind of assembly type steel casing device. BACKGROUND

[0002] Bored pile is widely used in the field of municipal and housing construction at present, which has strong adaptability to various geological conditions, no soil squeezing effect, no vibration damage, no noise, high bearing capacity, convenient construction, short construction period, low cost, less equipment and other advantages, greatly promoting the infrastructure construction of our country. Especially in soft soil areas such as Shanghai, bored pile is widely used in bridge foundation and foundation pit support engineering due to its high support and high bearing characteristics. According to the different construction methods of bored pile, it can be roughly divided into three types: soil squeezing bored pile, partial soil squeezing bored pile and non-soil squeezing bored pile. At present, for the purpose of less environmental pollution, large bearing capacity, high work efficiency, reliable pile forming quality and other purposes, bored pile forming technology and equipment are constantly innovated, and the direction of large diameter, buried type, high strength, composite type and low pollution is developed.

[0003] In the construction of bored pile, defects such as hole wall collapse, pile bottom sediment, pile necking, mud and fault, mud skin on pile side, concrete pipe leakage, hole wall soil loosening, softening and concrete pipe blockage during hole forming process often occur, which eventually leads to insufficient single pile bearing capacity. According to the site construction management experience of our company, the hole forming construction quality has important influence on the bearing and support characteristics of bored pile. The role of steel casing mainly reflects the following points: (1) testing the verticality of drill rod; (2) ensuring the horizontal stress of hole mouth, and preventing hole mouth from collapsing; (3) ensuring that hole mouth will not be enlarged due to the disassembly of drill rod, so as to cause the problem of diameter necking of adjacent pile hole mouth; (4) ensuring the uniformity of pile forming, and preventing the hole mouth from expanding to cause the large filling coefficient of bored pile. It can be seen that steel casing has great influence on the construction quality of bored pile, therefore, the placement of steel casing for bored pile is clearly required in national and local construction standards, that is, the placement depth of steel casing must exceed the thickness of surface miscellaneous soil and enter the original soil layer. Considering the acceleration of urbanization construction in various cities at present stage, the influence depth of human activities on surface soil layer increases, and presents obvious uneven phenomenon, in order to meet the placement depth requirement of steel casing for bored pile in different places during the construction process of each project, many different types of steel casings are needed on site, which causes the accumulation and waste of steel casing materials on site; according to the longest steel casing configuration, it is bound to cause the lengthening of construction period in the construction of relatively shallow miscellaneous soil area, which causes the waste of working hours. Therefore, it is necessary to design a steel casing with assembly function, which can achieve different assembly depths by adjusting the number of assembled steel casings, and the assembly type steel casing should also have the function of recycling, realizing the turnover of materials. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of assembled steel casing devices, and the first cylinder of upper and lower adjacent is suitable for being mutually connected by first connecting structure and second connecting structure, different depth steel casing can be set, effectively solve the construction quality problem caused by bored pile construction steel casing placement not in place;And detachable connection between adjacent first cylinder, the whole steel casing device is less, simple and reliable structure.

[0005] In order to achieve the above object, the utility model provides a kind of assembled steel casing devices, including several first cylinders and connecting device, the connecting device includes several first connecting structures and several second connecting structures, several the first connecting structure is arranged at the bottom of the first cylinder around the first cylinder, several the second connecting structure is arranged at the top of the first cylinder around the first cylinder, after rotating the first cylinder, the first connecting structure and the second connecting structure of adjacent first cylinder are suitable for being mutually fixedly connected, so that several the first cylinder is formed steel casing by the connecting device.

[0006] In some embodiments, the first connecting structure includes a first abutting block having a first abutting groove, and the second connecting structure includes a second abutting block having a second abutting groove.

[0007] After rotating the first cylinder, the first abutting block is suitable for abutting and fixing in the second abutting groove, and the second abutting block is suitable for abutting and fixing in the first abutting groove, so that the first connecting structure and the second connecting structure are mutually clamped and fixed.

[0008] In some embodiments, the second connecting structure further includes a third abutting block having a third abutting groove, and the second abutting block and the third abutting block are circumferentially spaced around the first cylinder, and the second abutting groove and the third abutting groove are oppositely arranged.

[0009] Before rotating the first cylinder, the first abutting block is located between the adjacent third abutting block and the second abutting block, and the first abutting block is suitable for passing through the gap between the second abutting block and the second abutting block.

[0010] After rotating the first cylinder, the first abutting block is abuttingly installed in the second abutting groove or the third abutting groove.

[0011] In some embodiments, the first abutting block has a pair of first abutting grooves, and the pair of first abutting grooves are respectively located on the left and right sides of the first abutting block, and the second abutting block and the third abutting block are suitable for abutting and fixing in the first abutting groove.

[0012] After rotating the first barrel mentioned above, the second abutting block or the third abutting block abuts against the first abutting groove.

[0013] In some embodiments, the first abutting block comprises a first part, a second part and a third part, the second part connects the first part and the third part, and both sides of the second part are recessed inward and form the first abutting groove.

[0014] In some embodiments, the second abutting block and the third abutting block each comprise a fourth part and a fifth part, the fourth part is arranged axially along the first barrel, and the fifth part is arranged circumferentially along the first barrel and extends oppositely, so that the fourth part and the fifth part are arranged perpendicularly and form the second abutting groove.

[0015] In some embodiments, the first connecting structure and / or the second connecting structure is any one or more of C-shaped, H-shaped, F-shaped and T-shaped.

[0016] In some embodiments, a second barrel is further included, the bottom of the second barrel is circumferentially spaced apart by a plurality of first connecting structures and is adapted to fixedly connect the second connecting structure of the top of the first barrel.

[0017] In some embodiments, a third barrel is further included, the top of the third barrel is circumferentially spaced apart by a plurality of second connecting structures, and the second connecting structures are adapted to fixedly connect the first connecting structures of the bottom of the first barrel.

[0018] In some embodiments, hoisting holes are arranged on the side walls of the second barrel, the third barrel and the first barrel, and the hoisting holes are arranged between adjacent first connecting structures or second connecting structures.

[0019] In some embodiments, the second barrel is further provided with an overflow port.

[0020] Compared with the prior art, the assembly type steel casing device provided by the utility model has at least one of the following beneficial effects:

[0021] 1. The upper and lower adjacent first barrels are adapted to be connected in series with each other through the first connecting structures and the second connecting structures, different depth steel casings can be arranged, various construction quality problems caused by the improper placement of the steel casing of the cast-in-place pile construction can be effectively solved, and the adjacent first barrels can be detachably connected, the entire steel casing device has few components and has a simple and reliable structure.

[0022] 2. The second abutting block and the third abutting block are respectively arranged on the two sides of the first abutting block, so that when the previous first cylinder rotates in any direction, the second connecting structure of the previous first cylinder is connected with the first connecting structure of the next first cylinder, preventing the lower steel casing from being taken out due to the wrong rotation direction, and reducing the assembly difficulty of the steel casing device.

[0023] 3. The second cylinder is a bottom cylinder, and the third cylinder is a top cylinder, wherein the first cylinder can be equipped with a certain number according to the actual needs on site, for adjusting the final combined length of the steel casing; the first cylinder, the second cylinder and the third cylinder are three different types of steel casings used to form different connection states, ensuring that the lower steel casing can be taken out together with the upper steel casing. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above-mentioned characteristics, technical features, advantages and implementation modes of the present application will be further described in a clear and understandable manner in combination with the preferred embodiments and the accompanying drawings.

[0025] Figure 1 is an assembly drawing of the assembled steel casing device;

[0026] Figure 2 is a structural drawing of the first cylinder;

[0027] Figure 3 is a structural drawing of the second cylinder;

[0028] Figure 4 is a structural drawing of the third cylinder;

[0029] Figure 5 is a structural drawing of the assembled steel casing device after rotation;

[0030] Figure 6 is another structural drawing of the assembled steel casing device after rotation.

[0031] BRIEF DESCRIPTION OF DRAWINGS:

[0032] The first cylinder 1, the first connecting structure 11, the first abutting block 111, the first abutting groove 1110, the first part 1111, the second part 1112, the third part 1113, the second connecting structure 12, the second abutting block 121, the second abutting groove 1210, the fourth part 1211, the fifth part 1212, the third abutting block 122, the third abutting groove 1220,

[0033] The second cylinder 2, the overflow port 21, the hoisting hole 22,

[0034] The third cylinder 3. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific implementation manners of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0036] In order to make the drawing simple, only the parts related to the present application are schematically shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is schematically shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0037] It should be further understood that the term "and / or" used in the present application and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0038] In this paper, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance. It should be pointed out that the above embodiments can be freely combined according to the needs. The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principle of the present application, some improvements and refinements can also be considered within the protection scope of the present application.

[0040] Reference Figure 1 And Figure 2This utility model provides an assembled steel casing device, including a plurality of first cylinders 1 and a connecting device. The connecting device includes a plurality of first connecting structures 11 and a plurality of second connecting structures 12. The plurality of first connecting structures 11 are circumferentially spaced at the bottom of the first cylinders 1, and the plurality of second connecting structures 12 are circumferentially spaced at the top of the first cylinders 1. After rotating the upper first cylinder 1, the first connecting structures 11 and second connecting structures 12 of adjacent first cylinders 1 are adapted to be fixedly connected to each other, so that the plurality of first cylinders 1 form a steel casing through the connecting device.

[0041] In this embodiment, the adjacent first cylinders 1 are adapted to be connected in series through the first connecting structure 11 and the second connecting structure 12, which can realize the setting of steel casings at different depths and effectively solve various construction quality problems caused by improper placement of steel casings in bored pile construction; moreover, the adjacent first cylinders 1 can be detachably connected, the whole steel casing device has few components and a simple and reliable structure.

[0042] Specifically, generally, steel casings of different depths are required due to the different strata where the piles are located. Considering that some projects have large construction areas and significant variations in surface soil thickness, multiple types of steel casings need to be provided on-site to meet the requirements for placing steel casings in bored pile construction, which is difficult to manage and inevitably leads to material waste. This application only requires a number of first casings 1 to complete steel casings of different depths. The top and bottom of the first casing 1 are respectively provided with a second connecting structure 12 and a first connecting structure 11. The top of the first casing 1 is provided with a number of second connecting structures 12 spaced around the circumference of the first casing 1, and the bottom of the first casing 1 is provided with a number of first connecting structures 11 spaced around the circumference of the first casing 1. The first connecting structure 11 of the previous first casing 1 is adapted to snap and fix the second connecting structure 12 of the next first casing 1, so that different numbers of first casings 1 can be selected according to different depths of steel casings. Preferably, the positions of the first connecting structure 11 and the second connecting structure 12 on the first cylinder 1 correspond to each other, that is, after rotation, the first connecting structure 11 and the second connecting structure 12 are located on the same axis of the first cylinder 1, and the first connecting structure 11 of the previous first cylinder 1 is adapted to be fixedly connected to the second connecting structure 12 of the next first cylinder 1.

[0043] The first connecting structure 11 includes a first abutting block 111, which has a first abutting groove 1110. The second connecting structure 12 includes a second abutting block 121, which has a second abutting groove 1210. After the first cylinder 1 is rotated, the first abutting block 111 is adapted to abut and be fixed in the second abutting groove 1210, and the second abutting block 121 is adapted to abut and be fixed in the first abutting groove 1110, so that the first connecting structure 11 and the second connecting structure 12 are mutually engaged and fixed.

[0044] It is worth noting that the first connecting structure 11 and / or the second connecting structure 12 is any one or more of C-shaped, H-shaped, F-shaped, and T-shaped. The specific shape of the first connecting structure 11 and the second connecting structure 12 is not further limited in the present application, as long as the first connecting structure 11 and the second connecting structure 12 can be fixedly connected to each other after the first cylinder body 1 is rotated.

[0045] Preferably, with reference to Figure 2 , the first abutting block 111 includes a first part 1111, a second part 1112, and a third part 1113, the second part 1112 connects the first part 1111 and the third part 1113, and the two sides of the second part 1112 are inwardly recessed and form a first abutting groove 1110. The second abutting block 121 and the third abutting block 122 each include a fourth part 1211 and a fifth part 1212, the fourth part 1211 is arranged axially along the first cylinder body 1, and the fifth part 1212 is arranged circumferentially along the first cylinder body 1 and extends towards each other, so that the fourth part 1211 and the fifth part 1212 are arranged perpendicularly and form a second abutting groove 1210. At this time, the first abutting block 111 is H-shaped, and the first abutting block 111 is provided with an abutting groove on each side in the circumferential direction of the first cylinder body 1, and each abutting groove is suitable for connecting the fifth part 1212 of the second abutting block 121. The third part 1113 of the first abutting block 111 is suitable for abutting and fixing the second abutting groove 1210 between the fifth part 1212 and the fourth part 1211. It is worth noting that there is a certain distance between the first connecting structure 11 and the second connecting structure 12 after being connected in rotation, so as to avoid the first connecting structure 11 from being unable to be inserted due to the attachment of silt in the second abutting groove 1210 of the second connecting structure 12.

[0046] Further, with reference to Figure 4 and Figure 5 , the second connecting structure 12 further includes a third abutting block 122, the third abutting block 122 has a third abutting groove 1220, the second abutting block 121 and the third abutting block 122 are arranged circumferentially along the first cylinder body 1 with a gap therebetween, and the second abutting groove 1210 and the third abutting groove 1220 are arranged oppositely; before the first cylinder body 1 is rotated, the first abutting block 111 is located relatively in the middle of the adjacent second abutting block 121 and third abutting block 122, and the first abutting block 111 is suitable for passing through the gap between the second abutting block 121 and the third abutting block 122; after the first cylinder body 1 is rotated, the first abutting block 111 is abuttingly installed in the second abutting groove 1210 or the third abutting groove 1220.

[0047] In this embodiment, the second abutting block 121 and the third abutting block 122 are respectively arranged on the two sides of the first abutting block 111, so that when the previous first cylinder 1 rotates in any direction, the second connecting structure 12 of the previous first cylinder 1 is connected with the first connecting structure 11 of the next first cylinder 1, preventing the lower steel cylinder from being taken out due to the wrong rotation direction, and reducing the assembly difficulty of the steel cylinder device.

[0048] Specifically, the first abutting block 111 has a pair of first abutting grooves 1110, and the second abutting block 121 and the third abutting block 122 are adapted to be abutted and fixed in the first abutting grooves 1110; after rotating the previous first cylinder 1, the second abutting block 121 or the third abutting block 122 is abutted and installed in the first abutting groove 1110. The distance between the second abutting block 121 and the third abutting block 122 is slightly larger than the size of the first connecting block. That is, the gap between the first abutting block 111, the second abutting block 121 and the third abutting block 122 before rotation corresponds to the mutual fixation of the first abutting block 111, the second abutting block 121 and the third abutting block 122 after rotation. During assembly, the first abutting block 111 is inserted between the second abutting block 121 and the third abutting block 122, and can be connected in any direction, so as to avoid the disconnection of the upper and lower first cylinders 1 caused by the wrong rotation direction. Therefore, the device does not specify a unified rotation direction, and the rotation direction of each first cylinder 1 is arbitrary, but it cannot be reversed after rotation in place to the end of construction. It is worth noting that the first cylinders 1 that have been connected cannot be disconnected, preferably, the entire assembly process can only rotate in one direction. That is, each first cylinder 1 cannot be reversed after rotation connection, and the first cylinder 1 cannot be rotated during recycling, so as to prevent the disconnection of the lower first cylinder 1.

[0049] Further, with reference to Figures 3 to 6 Further, the device also includes a second cylinder 2, and a plurality of first connecting structures 11 are arranged on the bottom of the second cylinder 2 and are adapted to fixedly connect the second connecting structures 12 on the top of the first cylinder 1. The device also includes a third cylinder 3, and a plurality of second connecting structures 12 are arranged on the top of the third cylinder 3 and are adapted to fixedly connect the first connecting structures 11 on the bottom of the first cylinder 1.

[0050] In this embodiment, the second cylinder 2 is a bottom cylinder, and the third cylinder 3 is a top cylinder. A certain number of first cylinders 1 can be provided according to the actual needs on site, which are used to adjust the final combined length of the steel cylinder. The first cylinder 1, the second cylinder 2 and the third cylinder 3 are three different types of steel cylinders used to form different connection states, so as to ensure that the lower steel cylinder can be taken out together with the upper steel cylinder.

[0051] Specifically, generally, the three types of steel casings of the cast-in-place pile assembly type steel casing need to be used in combination, that is, the second casing 2, the first casing 1, and the third casing 3 form an integral steel casing. A certain number of first casings 1 can be provided according to the actual required length of the steel casing. Generally, the three types of steel casings of the cast-in-place pile assembly type steel casing can also be used alone. When used alone, the following combinations can be used, including but not limited to: the second casing 2, the second casing 2 and the third casing 3, etc. The first casing 1, the second casing 2, and the third casing 3 are connected through the first connecting structure 11 and the second connecting structure 12, wherein the first connecting structure 11 is located at the bottom of the first casing and the second casing; the second connecting structure 12 is located at the top of the third casing and the first casing. The first connecting structure 11 and the second connecting structure 12 are used in pairs, and each is uniformly distributed along the circumference of the steel casing.

[0052] The second casing 2, the third casing 3, and the first casing 1 are each provided with a lifting hole 22 on the side wall, and the lifting hole 22 is arranged between adjacent first connecting structures 11 or second connecting structures 12. The three types of casings are each designed with two lifting holes 22 symmetric about the axis of the casing, to facilitate the construction of casings with large weights. The second casing 2 is also provided with an overflow port 21, and the overflow port 21 of the second casing 2 and the lifting hole 22 are symmetrically arranged about the axis of the second casing 2, and the overflow port 21 is used as the lifting hole 22 during installation.

[0053] It is worth noting that the device can be equipped according to the maximum length of the steel casing required on site, and can be assembled according to the setting depth of the steel casing at different positions after arriving at the site, to ensure that the depth of the steel casing meets the construction requirements. In addition, the device adopts an assembly form, which can reduce the number of steel casings required on site while meeting the depth requirements of steel casings at different positions, and can reduce material waste. The total length of the steel casing can be adjusted by adjusting the number of first casings 1.

[0054] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A fabricated steel casing device, characterized in that, The assembly type steel casing device comprises a plurality of first cylinder bodies and a connecting device, the connecting device comprises a plurality of first connecting structures and a plurality of second connecting structures, the plurality of first connecting structures are arranged at the bottom of the first cylinder body in a circumferential direction, and the plurality of second connecting structures are arranged at the top of the first cylinder body in a circumferential direction, after rotating the last first cylinder body, the first connecting structure and the second connecting structure of the adjacent first cylinder body are adapted to be fixedly connected with each other, so that the plurality of first cylinder bodies form a steel casing through the connecting device.

2. The assembly type steel casing device according to claim 1, wherein the first connecting structure comprises a first abutting block, the first abutting block has a first abutting groove, the second connecting structure comprises a second abutting block, and the second abutting block has a second abutting groove; after rotating the last first cylinder body, the first abutting block is adapted to be fixedly abutted in the second abutting groove, and the second abutting block is adapted to be fixedly abutted in the first abutting groove, so that the first connecting structure and the second connecting structure are fixedly connected with each other.

3. The assembly type steel casing device according to claim 2, wherein the second connecting structure further comprises a third abutting block, the third abutting block has a third abutting groove, the second abutting block and the third abutting block are arranged in a circumferential direction around the first cylinder body, and the second abutting groove and the third abutting groove are oppositely arranged; before rotating the last first cylinder body, the first abutting block is located between the adjacent second abutting block and third abutting block, and the first abutting block is adapted to pass through the gap between the second abutting block and the third abutting block; after rotating the last first cylinder body, the first abutting block is adapted to be abutted and installed in the second abutting groove or the third abutting groove.

4. The assembly type steel casing device according to claim 3, wherein the first abutting groove on the first abutting block is a pair of first abutting grooves, and the pair of first abutting grooves are respectively located on the left and right sides of the first abutting block, and the second abutting block and the third abutting block are adapted to be fixedly abutted in the first abutting groove; after rotating the last first cylinder body, the second abutting block or the third abutting block is abutted and installed in the first abutting groove.

5. The assembly type steel casing device according to claim 3, wherein the first abutting block comprises a first part, a second part and a third part, the second part connects the first part and the third part, and the two sides of the second part are recessed inward and form the first abutting groove.

6. The assembly type steel casing device according to claim 5, wherein the second abutting block and the third abutting block each comprise a fourth part and a fifth part, the fourth part is arranged in an axial direction along the first cylinder body, and the fifth part is arranged in a circumferential direction along the first cylinder body and extends towards each other, so that the fourth part and the fifth part are arranged perpendicularly and form the second abutting groove.

7. The assembly type steel casing device according to claim 1, wherein The first connecting structure and / or the second connecting structure is any one or more of C-shaped, H-shaped, F-shaped, and T-shaped.

8. The fabricated steel casing device according to any one of claims 1-7, characterized in that, The second casing body is further provided with a plurality of first connecting structures at the bottom thereof and spaced circumferentially, and the first connecting structures are adapted to fixedly connect the second connecting structures of the top of the first casing body.

9. The fabricated steel casing device according to claim 8, characterized in that, The third casing body is further provided with a plurality of second connecting structures at the top thereof and spaced circumferentially, and the second connecting structures are adapted to fixedly connect the first connecting structures of the bottom of the first casing body.

10. The fabricated steel casing device according to claim 9, characterized in that, The second casing body, the third casing body, and the side wall of the first casing body are all provided with lifting holes, and the lifting holes are arranged between adjacent first connecting structures or second connecting structures; And / or, the second casing body is further provided with an overflow port.

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