Auxiliary device for positioning steel casing of cast-in-situ bored pile

Abstract

The invention discloses a cast-in-situ bored pile steel casing positioning auxiliary device, and belongs to the field of cast-in-situ bored pile casting auxiliary devices.The cast-in-situ bored pile steel casing positioning auxiliary device comprises more than two composite blocks, steel chisels and supporting pull rods, the composite blocks are arranged from bottom to top, the multiple steel chisels are inserted into the composite blocks, and the supporting pull rods are arranged on the composite blocks. And a plurality of supporting pull rods are connected between the adjacent synthesis blocks. And the whole body adopts a spliced structure, so that the perpendicularity is stable, and deviation is not easy to occur. And the height of the auxiliary device can be flexibly adjusted according to the height of the on-site pre-buried pile casing exposed out of the ground, and sufficient support is provided for the cast-in-place pile casing of on-site construction. And the combined blocks of different specifications can be selected according to the pile diameter needed by site construction, and the applicability of the device is improved. And meanwhile, due to the splicing type design, the transportation cost can be reduced, the assembling and splicing efficiency is high, and the construction efficiency can be effectively improved. And the composite material can be recycled for multiple times, and has excellent economical efficiency and environmental protection property.

Description

Technical Field

[0001] The invention relates to the field of bored pile casting assistance, and more specifically to a bored pile steel casing positioning assistance device. Background Art

[0002] In foundation engineering, bored cast-in-place piles are formed by rotary drilling in the original foundation soil by large mechanical equipment such as rotary pile drivers at the construction site, placing steel cages inside and pouring concrete. Bored cast-in-place piles can withstand large loads and are suitable for a wide range of foundations. They are one of the most commonly used pile types at present.

[0003] In the prior art, for example, Chinese patent (CN 218757472 U) discloses a pile foundation steel casing positioning frame, comprising two fixing frames and four supporting columns, wherein the top and the bottom of the supporting columns are respectively fixedly connected to the two fixing frames, and the four supporting columns are respectively located at the four corners of the fixing frames, and the inner sides of the fixing frames are provided with mounting grooves, and the insides of the mounting grooves are provided with four threaded rods, and the two adjacent threaded rods are vertically arranged, and the threaded rods are respectively provided with moving blocks, and the moving blocks are rotatably connected to the connecting rods on the sides close to the center of the fixing frames, and the positioning rods are rotatably installed at the four corners of the mounting grooves close to the inner sides of the fixing frames, and the other ends of the positioning rods are rotatably connected to the ends of the connecting rods close to the moving blocks; the utility model can be adjusted according to the size of the steel casing required for construction, so as to achieve a certain degree of versatility.

[0004] In the above existing schemes, the steel casing positioning of bored piles uses a "steel casing positioning frame" to control the vertical deviation stability of the steel casing during the process of burying it into the original soil layer. The "steel casing positioning frame" has high cost, poor environmental protection, and complex structure. During the pile foundation construction process, this "steel casing positioning frame" needs to be assembled in advance, which is difficult to meet the installation conditions at the construction site, and the overall structure is too large, which is inconvenient to move manually. The "steel casing positioning frame" has no corresponding supporting fixing measures. After being buried in situ, it is easy to be affected by the drilling power of the pile driver's rotary drilling pick barrel to cause deviation, and it is difficult to independently meet the positioning requirements of the verticality of the bored pile steel casing. In addition, there are many types of engineering pile diameter specifications in foundation engineering, and the pile hole diameter specifications are generally 800㎜, 1000㎜, 1200㎜, 1500㎜, etc., while the "steel casing positioning frame" is a fixed structure, which is difficult to adjust and change according to the actual situation on site. Summary of the invention

[0005] In order to overcome the defects of the prior art, the present invention provides a bored cast-in-place pile steel casing positioning auxiliary device, which can overcome the defects of the prior art steel casing positioning frame, such as high cost, complex structure and difficulty in adjustment.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The invention provides a bored cast-in-place pile steel casing positioning auxiliary device, comprising a composite block, a steel chisel, and a support rod. Two or more composite blocks are arranged from bottom to top, a plurality of steel chisels are plugged into the composite blocks, and a plurality of support rods are connected between adjacent composite blocks.

[0008] In a preferred technical solution of the present invention, the composite block is composed of multiple independent blocks, the multiple independent blocks are spliced ​​in sequence, the independent blocks on two adjacent composite blocks correspond to each other one by one, and the supporting rod is connected between the independent blocks corresponding to two adjacent composite blocks.

[0009] In a preferred technical solution of the present invention, a convex hinge is fixed on the independent block, and the supporting pull rod is connected to the convex hinges of the corresponding two independent blocks.

[0010] In a preferred technical solution of the present invention, the support rod is formed by two smooth round stainless steel pipes connected to each other by rivets.

[0011] In a preferred technical solution of the present invention, the composite block is composed of four independent blocks, the independent blocks are configured as right-angle blocks, and the convex hinge is fixed to the bottom of the right-angle side of the independent block.

[0012] In a preferred technical solution of the present invention, the independent block is provided with a hole for the steel drill to pass through.

[0013] In a preferred technical solution of the present invention, one side of the independent block is an arc edge, and after the independent blocks are spliced ​​into the composite block, the arc edge forms an opening for the steel casing to pass through.

[0014] In a preferred technical solution of the present invention, a hexagonal diamond cap is provided on the top of the steel chisel.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a bored pile casing positioning auxiliary device, which adopts a splicing structure as a whole, has stable verticality and is not prone to deviation. In addition, the height of the auxiliary device can be flexibly adjusted according to the height of the pre-buried casing exposed above the ground, providing sufficient support for the bored pile casing in the on-site construction. It is also possible to select synthetic blocks of different specifications according to the pile diameter required for the on-site construction, thereby improving the applicability of the device. At the same time, the splicing design can also reduce transportation costs, and the assembly and splicing efficiency is high, which can effectively improve the efficiency of construction. It can also be recycled many times, with excellent economy and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an elevation view of a bored cast-in-place pile steel casing positioning auxiliary device provided by a specific embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0019] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure;

[0020] Figure 4 It is a schematic diagram of the structure of a bored pile steel casing positioning auxiliary device provided by a specific embodiment of the present invention in use state;

[0021] Figure 5 yes Figure 1 A schematic diagram of a top view structure;

[0022] Figure 6 The present invention is a schematic diagram of the use status of a bored cast-in-place pile steel casing positioning auxiliary device provided by the present invention.

[0023] In the figure:

[0024] 1. Steel casing; 2. Steel chisel; 3. Independent module; 4. Support rod; 5. Rivet; 6. Convex hinge. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0026] like Figure 1-Figure 5 As shown, an embodiment provides a bored cast-in-place pile steel casing positioning auxiliary device, including a composite block, a steel chisel 2, and a support rod 4. More than two composite blocks are arranged from bottom to top, multiple steel chisels 2 are inserted into the composite blocks, and multiple support rods 4 are connected between adjacent composite blocks.

[0027] The composite block serves as a supporting frame of the device, ensuring that the overall verticality of the steel casing 1 structure is stable and reliable during the burying of the steel casing 1 and the drilling of the pile driver by the positioning auxiliary device.

[0028] Furthermore, the composite block is composed of a plurality of independent blocks 3, and the plurality of independent blocks 3 are spliced ​​in sequence, and the independent blocks 3 on two adjacent composite blocks correspond to each other one by one, and a supporting rod 4 is connected between the independent blocks 3 corresponding to two adjacent composite blocks.

[0029] Furthermore, a convex hinge 6 is fixed on the independent block 3, and the support rod 4 is connected to the convex hinge 6 of the corresponding two independent blocks 3. The support rod 4 is made of two round stainless steel pipes connected to each other by rivets 5. The convex hinge 6 mainly plays a role in positioning and fixing the support rod 4 and allows the support rod 4 to rotate relatively between the convex hinges 6.

[0030] Furthermore, the composite block is composed of four independent blocks 3 , the independent blocks 3 are configured as right-angle blocks, and the convex hinge 6 is fixed to the bottom of the right-angle side of the independent block 3 .

[0031] Furthermore, the independent block 3 is provided with a hole for the steel drill 2 to pass through.

[0032] Furthermore, one side of the independent block 3 is an arc edge. After the independent blocks 3 are spliced ​​into a composite block, the arc edge forms an opening for the steel casing 1 to pass through.

[0033] Furthermore, a hexagonal diamond cap is provided on the top of the steel drill 2.

[0034] When installing this device, first, according to the axis of the bored pile position set out by the surveyor on the original geological soil layer as the positioning basis, each single group of pre-assembled components of the bored pile steel casing positioning auxiliary device is placed on the ground of the intended rotary drilling pile position, and then assembled along the central axis of the pile position into a complete bored pile steel casing positioning auxiliary device. Among them, the length and width of the independent block 3 are both 1000mm, the thickness is 10mm, the interior is arc-shaped, and the outside is a right angle equilateral right angle. The end of the independent block 3 is opened with a hole with a diameter of 80mm for the steel drill 2 to enter and exit, and the composite block material is stainless steel. The diameter size of the single smooth round stainless steel pipe in the support rod 4 is 30mm and the length is 500mm. A hollow hole with a diameter of 20mm is set in the center 15mm away from one side of the end, and the material is stainless steel. The diameter size of the rivet 5 is 20mm and the length is 30mm, and the material is stainless steel. The bottom length of the convex hinge 6 is 94mm, the width is 80mm, and the height is 40mm, of which the arc convex part is 20mm high and the width of the central part is 30mm. The material is stainless steel. The diameter of the steel drill 2 is 80mm and the length is 1500mm. The diamond cap is hexagonal, with a diameter of 80mm and a height of 20mm. The material is carbon steel. First, each convex hinge 6 is welded to the designed position in each independent block 3 one by one by arc welding. In this embodiment, two convex hinges 6 are respectively provided on the two right-angled sides of the independent block 3. Then, the support rod 4 and the convex hinge 66 are riveted by rivets 5 to form a movable component between the upper and lower independent blocks 3. Four groups of movable components are assembled in the same way. Then, the four groups of movable components are symmetrically spliced ​​and assembled along the center direction to form an internally closed cylindrical support frame. Then, the support rod 4 in each movable component is gradually extended up and down from the folded state to a columnar state. Four steel drills 2 are respectively rammed into the holes opened at the end of the independent block 3 to form a complete bored pile steel casing positioning auxiliary device. Then, the steel drill 2 is rammed into the foundation soil layer, and the steel drill 2 is closely connected with the foundation soil layer to ensure that it plays an anchoring and load-bearing role for the positioning auxiliary device.

[0035] The steel casing 1 is then vertically buried into the original foundation soil layer along the bored pile steel casing positioning auxiliary device through a crawler-type plate inserter, and then the construction processes of moving the machine into place, rotary drilling, lowering the steel cage, and pouring underwater concrete are implemented according to the technical requirements of the specifications. Finally, the steel casing 1 can be removed only after the poured underwater concrete has reached the strength required by the specifications, and the positioning auxiliary device can be retrieved for multiple recycling.

[0036] The construction process flow is as follows: site leveling → pile axis measurement and layout → installation of positioning auxiliary device → burying casing → drilling rig in place → rotary drilling → measuring drilling depth → first hole cleaning → lowering of steel cage → lowering of concrete pouring conduit → second hole cleaning → installation of water stop ball plug → pouring of underwater concrete → removal of steel casing 1 and positioning auxiliary device → moving to the next pile position.

[0037] In this technology, the independent blocks 3 are connected to each other through supporting rods 4, rivets 5 and convex hinges 6 to form a positioning auxiliary device, and the positioning auxiliary device is installed along the central axis of the pile position to control the stability of the verticality of the buried steel casing 1, effectively prevent the verticality deviation of the steel casing 1 during the burial of the steel casing 1 and the drilling of the pile driver, avoid the displacement of the cast-in-place pile position, ensure the quality of the cast-in-place pile, have good economy, environmental protection and construction efficiency, and are easy to manufacture.

[0038] Other technologies of this embodiment adopt existing technologies.

[0039] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A bored pile steel casing positioning auxiliary device, characterized in that: It comprises a composite block, a steel drill (2), and a supporting pull rod (4), wherein two or more composite blocks are arranged from bottom to top, a plurality of steel drills (2) are plugged into the composite blocks, and a plurality of supporting pull rods (4) are connected between adjacent composite blocks.

2. A bored pile steel casing positioning auxiliary device according to claim 1, characterized in that: The composite block is composed of a plurality of independent blocks (3), the plurality of independent blocks (3) are spliced ​​in sequence, the independent blocks (3) on two adjacent composite blocks correspond to each other one by one, and the support rod (4) is connected between the independent blocks (3) corresponding to two adjacent composite blocks.

3. The bored pile steel casing positioning auxiliary device according to claim 1, characterized in that: A convex hinge (6) is fixed on the independent block (3), and a supporting pull rod (4) is connected to the convex hinges (6) of the two corresponding independent blocks (3).

4. The bored pile steel casing positioning auxiliary device according to claim 1, characterized in that: The support rod (4) is formed by two smooth round stainless steel pipes connected to each other via rivets (5).

5. The bored pile steel casing positioning auxiliary device according to claim 1, characterized in that: The composite block is composed of four independent blocks (3), the independent blocks (3) are configured as right-angle blocks, and the convex hinge (6) is fixed to the bottom of the right-angle side of the independent block (3).

6. The bored pile steel casing positioning auxiliary device according to claim 1, characterized in that: The independent assembly block (3) is provided with a hole for the steel chisel (2) to pass through.

7. The bored pile steel casing positioning auxiliary device according to claim 1, characterized in that: One side of the independent block (3) is an arc edge, and after the independent blocks (3) are spliced ​​into the composite block, the arc edge forms an opening for the steel casing (1) to pass through.

8. The bored pile steel casing positioning auxiliary device according to claim 1, characterized in that: The top of the steel chisel (2) is provided with a hexagonal diamond cap.

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