Open-web sheet pile core mold convenient to disassemble and assemble, mold and using method of open-web sheet pile core mold convenient to disassemble and assemble

Abstract

The invention discloses an open-web sheet pile core mold convenient to disassemble and assemble, a mold and a using method, the open-web sheet pile core mold comprises a first main shaft, a second main shaft and a third main shaft which are parallel to one another, the third main shaft is arranged between the first main shaft and the second main shaft, and a plurality of assembling rods are arranged between the first main shaft and the second main shaft; a plurality of first grooves are symmetrically formed in the upper surface and the lower surface of the first main shaft in the axial direction respectively, a plurality of second grooves are symmetrically formed in the upper surface and the lower surface of the second main shaft in the axial direction respectively, connecting rods are arranged in the first grooves and the second grooves, and a rotatable upper supporting rod and a rotatable lower supporting rod are arranged between the symmetrically-arranged connecting rods. The upper supporting rods are connected through a first rope, and the lower supporting rods are connected through a second rope. The problems that in the existing pile foundation production process, a core mold is difficult to detach, and a plurality of air cylinders or hydraulic oil cylinders cannot be installed due to the small inner cavity space of the core mold are solved.

Description

Technical Field

[0001] The invention relates to the technical field of equipment for pile foundation construction, and in particular to a hollow sheet pile core mold and a mold which are easy to disassemble and assemble, and a use method thereof. Background Art

[0002] At present, the most common method of producing hollow sheet piles is to place a rigid core mold with a fixed shape inside the outer mold. After the pouring and curing processes of the sheet pile are completed, the core mold is pulled out to complete the removal of the core mold. However, due to the large length of the sheet pile, the connection between the inner wall of the pile body and the core mold is relatively tight, which makes it extremely difficult to remove the core mold smoothly. During the disassembly process, if too much stress is applied, the inside of the pile body will be damaged, affecting the quality and service life of the pile foundation, which is not conducive to the subsequent safe use. At the same time, it will cause damage to the mold and shorten the service life of the mold.

[0003] To this end, Chinese invention patent CN105599133B discloses a retractable mold, which includes a first side plate and a third side plate located on the left and right sides, and a second side plate and a fourth side plate located on the upper and lower sides. The first, second, third and fourth side plates are connected by a retractable structure. During use, the shell can be expanded outwardly through the retractable mechanism to form a closed core mold for pouring a pile body with a hollow structure. When the pile body is poured, the side plates are retracted through the retractable mechanism to separate them from the inner wall of the pile foundation for easy removal. However, the core mold removal system of this structure is not very practical for piles with insufficient cross-sections, and it is not easy to put multiple cylinders or hydraulic cylinders into the mold cavity and operate them simultaneously.

[0004] Sheet piles produced by prior art are Figure 4 As shown, the cross-section of the cavity inside the sheet pile is the same from beginning to end. Since the ends of the sheet pile are frequently subjected to stress during transportation, lifting and construction, such ends are easily damaged. In addition, after the upper and lower sections of the sheet pile are assembled, there are only two rows of screw-type connection structures at the connection parts, and the shear resistance is poor. Summary of the invention

[0005] In view of this, the purpose of the present invention is to solve the problems in the existing pile foundation production process, such as the difficulty in removing the core mold and the small inner cavity space of the core mold that cannot accommodate multiple cylinders or hydraulic cylinders.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A hollow sheet pile core mold that is easy to disassemble and assemble, comprises a first main axis, a second main axis and a third main axis that are parallel to each other, the third main axis is arranged between the first main axis and the second main axis, and a plurality of assembly rods are arranged between the first main axis and the second main axis; the upper and lower surfaces of the first main axis are respectively axially symmetrically arranged with a plurality of first grooves, the upper and lower surfaces of the second main axis are respectively axially symmetrically arranged with a plurality of second grooves, connecting rods are arranged in the first grooves and the second grooves, rotatable upper support rods and lower support rods are arranged between the symmetrically arranged connecting rods, the plurality of upper support rods are connected by a first rope, and the plurality of lower support rods are connected by a second rope.

[0008] In some embodiments, the upper support rod is provided with a first through hole, the lower support rod is provided with a second through hole, and the first and second ropes are respectively passed through the first and second through holes.

[0009] In some embodiments, the upper support rod and the lower support rod are arc-shaped.

[0010] In some embodiments, air bags are sleeved on the outer sides of the first and second support rods.

[0011] In some embodiments, a plurality of pulley blocks are respectively disposed at both ends of the third main shaft, and the first rope and the second rope are passed through the pulley blocks.

[0012] In some embodiments, an end mold portion with a cross-sectional height smaller than the main portion of the core mold is disposed at each end of the third main shaft.

[0013] A mould comprises the above-mentioned hollow sheet pile core mould which is easy to disassemble and assemble.

[0014] A method for using a hollow sheet pile core mold comprises the following steps:

[0015] S100: Pulling the upper support rod and the lower support rod respectively by the first rope and the second rope to be tensioned until they form an ellipse with each other and are perpendicular to the plane formed by the first main axis and the second main axis;

[0016] S200: Fasten the ends of the first rope and the second rope to the end of the third main shaft to complete the construction of the core mold frame structure;

[0017] S300: Put the airbag on the outside of the core mold frame, fix the two ends, and inflate the airbag until it is full and sealed. The assembly of the core mold is completed and the core mold can be used to cast concrete sheet piles.

[0018] In some embodiments, the following steps are also included: S400: After the sheet piles are cast, the core mold is deflated, the steel rope is untied and pulled, the upper support rod and the lower support rod are leveled, the air bag is vacuumed to separate it from the inner wall of the concrete, and then the mold frame and the air bag are dragged out as a whole to complete the disassembly of the core mold.

[0019] In some embodiments, in steps S100 and S200, before pouring the pile foundation, the first rope is pulled to drive the upper support rod to stand up, perpendicular to the plane formed by the first main axis and the second main axis, and then the first rope is fastened to both ends of the third main axis; the second rope is then pulled to drive the lower support rod to stand up, perpendicular to the plane formed by the first main axis and the second main axis, and then the second rope is fastened to both ends of the third main axis;

[0020] In step S400, after the sheet pile production is completed, the airbag is deflated, and then the upper support rod is pulled to the right by the first rope until it lies flat on the right; similarly, the lower support rod is pulled to the left by the second rope again until it lies flat on the left; the airbag is then evacuated to shrink the airbag so that it can be separated from the inner wall of the sheet pile cavity, and finally the core mold is pulled out from the inner wall of the cavity.

[0021] The connecting device provided by the present invention has the following advantages:

[0022] The present invention can better complete demoulding, avoid the damage to the inside of the pile body when the rigid core mold is demoulded, and avoid the problem of damage to the core mold. The problem of the airbag being easily deformed by the impact of concrete is avoided. The conventional airbag core mold will be deformed by the impact of concrete during the pouring of concrete, resulting in uneven wall thickness of different parts of the poured hollow sheet pile, some parts are very thick, and some parts are very thin, which causes huge problems for the quality of the pile foundation and brings huge safety hazards to the subsequent use of the pile foundation; while using the core mold of the present invention, because a support frame is set inside the airbag, the quality problems caused by the deformation of the airbag can be effectively avoided, and the quality of the hollow sheet pile can be effectively guaranteed; in addition, hollow sheet piles with small cavities at both ends and large cavities in the center can be produced. At the same time, the core mold can be easily removed from the inside of the sheet pile, and the pulley set on the third main shaft is conducive to smoother pulling of the steel rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 Schematic diagram of a hollow sheet pile core mold that is easy to disassemble and assemble provided by an embodiment of the present invention;

[0025] Figure 2 The present invention Figure 1 Schematic diagram of the AA section;

[0026] Figure 3 Schematic diagram of a sheet pile produced by using the core mold of the present invention provided in an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the existing sheet pile provided in the background technology part of the present invention;

[0028] In the attached figure:

[0029] 2. Upper support rod; 3. Lower support rod; 4. Airbag; 7. First rope 7; 8. Second rope; 11. First main shaft; 12. Second main shaft; 13. Assembly rod; 14. Third main shaft; 21. First through hole; 31. Second through hole; 111. First groove; 121. Second groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] <Example 1>

[0032] like Figure 1 to Figure 2As shown, the present embodiment provides a hollow sheet pile core mold 1 that is easy to disassemble and assemble, comprising a first main shaft 11, a second main shaft 12 and a third main shaft 14 that are parallel to each other, the third main shaft 14 is arranged between the first main shaft 11 and the second main shaft 12, and a plurality of assembly rods 13 are arranged between the first main shaft 11 and the second main shaft 12; the upper and lower surfaces of the first main shaft 11 are respectively axially symmetrically arranged with a plurality of first grooves 111, and the upper and lower surfaces of the second main shaft 12 are respectively axially symmetrically arranged with a plurality of second grooves 121, and the first grooves 111 and the second grooves 121 are respectively provided with connecting rods, namely, connecting rods 112, 114, 122 and 124. Rotatable upper support rods 2 and lower support rods 3 are arranged between the symmetrically arranged connecting rods, the plurality of upper support rods 2 are connected by first ropes 7, and the plurality of lower support rods 3 are connected by second ropes 8, and the first and second ropes are both steel ropes. In the above technical scheme, the upper support rod 2 is arc-shaped, and its two ends are connected to the top of the first main axis 11 and the second main axis 12 with the connecting rod 112 and the connecting rod 114 by hinges or bearings; the lower support rod 3 is arc-shaped, and its two ends are connected to the bottom of the first main axis 11 and the second main axis 12 with the connecting rod 122 and the connecting rod 124 by hinges or bearings; before using the core mold, the upper support rod 2 and the lower support rod 3 are pulled up and tensioned respectively by rope pulling until they form an ellipse with each other and are perpendicular to the plane formed by the first main axis 1 and the second main axis 2. At this time, the end of the steel rope is bolted to the end of the third main axis 14 of the core mold, and the core mold can complete the construction of the core mold frame structure.

[0033] In this embodiment, the upper support rod 2 is provided with a first through hole 21, and the lower support rod 3 is provided with a second through hole 31, and the first and second ropes are respectively passed through the first and second through holes.

[0034] In this embodiment, airbags 4 are sleeved on the outer sides of the first and second support rods, and the airbags 4 are used for inflation.

[0035] In this embodiment, a plurality of pulley blocks are respectively arranged at both ends of the third main shaft 14, and the first rope 7 and the second rope 8 are passed through the pulley blocks. The first rope passes through the first to sixth pulleys 71, 72, 73, 74, 75, 76 of the first pulley block, and the second rope passes through the first to sixth pulleys 81, 82, 83, 84, 85, 86 of the second pulley block. The pulleys arranged on the third main shaft 14 are conducive to smoother pulling of the steel rope. An end mold part 51, 52 with a cross-sectional height smaller than the main part of the core mold is respectively arranged at both ends of the third main shaft 14.

[0036] <Example 2>

[0037] In this embodiment, the same parts as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0038] This embodiment provides a mold, including the hollow sheet pile core mold that is easy to disassemble and assemble as described in the first embodiment.

[0039] <Example 3>

[0040] Compared with the first and second embodiments, the present embodiment provides a method for using a hollow sheet pile core mold, comprising the following steps: S100: pulling the upper support rod 2 and the lower support rod 3 respectively by means of the first rope 7 and the second rope 8, until they form an ellipse with each other and are perpendicular to the plane formed by the first main axis 11 and the second main axis 12; S200: fastening the ends of the first rope 7 and the second rope 8 to the ends of the third main axis 14 to complete the construction of the core mold frame structure; S300: fitting the airbag 4 onto the outside of the core mold frame, fixing the two ends, and inflating the airbag until the airbag is full and sealed, thereby completing the assembly of the core mold, and the core mold can be used to cast concrete sheet piles.

[0041] This implementation also includes the following steps: S400: After the sheet piles are poured, the core mold is deflated, the steel rope is untied and pulled, the upper support rod 2 and the lower support rod 3 are flattened, the air bag 4 is evacuated to separate it from the inner wall of the concrete, and then the mold frame and the air bag are dragged out as a whole, thereby completing the disassembly of the core mold.

[0042] Furthermore, in steps S100 and S200, before pouring the pile foundation, the first rope 7 is pulled to drive the upper support rod 2 to stand up, perpendicular to the plane formed by the first main axis 11 and the second main axis 12, and then the first rope 7 is fastened to the two ends of the third main axis; the second rope 8 is then pulled to drive the lower support rod 3 to stand up, perpendicular to the plane formed by the first main axis 11 and the second main axis 12, and then the second rope 8 is fastened to the two ends of the third main axis 14;

[0043] In step S400, after the sheet pile production is completed, the airbag is deflated, and then the upper support rod 2 is pulled to the right by the first rope 7 until it lies flat on the right; similarly, the lower support rod 3 is pulled to the left by the second rope 8 again until it lies flat on the left; the airbag is then evacuated to shrink the airbag so that it can be separated from the inner wall of the sheet pile cavity, and finally the core mold is pulled out from the inner wall of the cavity.

[0044] The technical effect of the above embodiment is: hollow sheet piles with small cavities at both ends and large central cavities can be produced. At the same time, the core mold can be easily removed from the inside of the sheet pile. In addition, the pulley arranged on the third main shaft is conducive to smoother pulling of the steel rope.

[0045] The sheet pile structure produced in this embodiment is as follows Figure 3As shown, the cavity in the cross section of the main part of the sheet pile is consistent with the prior art, which realizes the function of reducing the amount of cement concrete and lightweighting the pile foundation, while the cross-sectional area of ​​the cavity at the end of the sheet pile is much smaller than the cross-sectional area of ​​the cavity of the main part. In this way, the stress resistance effect of the end of the pile foundation can be significantly improved. In addition, four rows of screw-type connection structures are arranged at the end of the pile foundation. After the sheet pile is assembled up and down, the shear resistance of the connection part is greatly improved, which significantly increases its performance and service life.

[0046] In the above-mentioned embodiments 1 to 3, during the working process, as the working environment is different, some technical implementation methods of embodiments 1 to 3 can be combined or replaced.

[0047] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hollow sheet pile core mold that is easy to disassemble and assemble, characterized in that: It includes a first main shaft, a second main shaft and a third main shaft which are parallel to each other. The third main shaft is arranged between the first main shaft and the second main shaft, and a plurality of assembly rods are arranged between the first main shaft and the second main shaft. The upper and lower surfaces of the first main shaft are respectively provided with a plurality of first grooves symmetrically along the axis, and the upper and lower surfaces of the second main shaft are respectively provided with a plurality of second grooves symmetrically along the axis. Connecting rods are arranged in the first grooves and the second grooves, and rotatable upper support rods and lower support rods are arranged between the symmetrically arranged connecting rods. The plurality of upper support rods are connected by a first rope, and the plurality of lower support rods are connected by a second rope.

2. The hollow sheet pile core mold that is easy to disassemble and assemble according to claim 1 is characterized in that: The upper support rod is provided with a first through hole, the lower support rod is provided with a second through hole, and the first and second ropes are respectively passed through the first and second through holes.

3. The hollow sheet pile core mold that is easy to disassemble and assemble according to claim 2 is characterized in that: The upper support rod and the lower support rod are arc-shaped.

4. The hollow sheet pile core mold that is easy to disassemble and assemble according to claim 1 is characterized in that: Air bags are sleeved on the outer sides of the first and second support rods.

5. The hollow sheet pile core mold that is easy to disassemble and assemble according to claim 1 is characterized in that: A plurality of pulley blocks are respectively arranged at both ends of the third main shaft, and the first rope and the second rope are passed through the pulley blocks.

6. The hollow sheet pile core mold that is easy to disassemble and assemble according to claim 5, characterized in that: An end mold portion with a cross-sectional height smaller than that of the main part of the core mold is respectively arranged at both ends of the third main shaft.

7. A mold, characterized in that: The invention comprises the hollow sheet pile core mould which is easy to disassemble as claimed in any one of claims 1 to 6.

8. A method for using a hollow sheet pile core mold, characterized in that: The following steps are involved: S100: Pulling the upper support rod and the lower support rod respectively by the first rope and the second rope to be tensioned until they form an ellipse with each other and are perpendicular to the plane formed by the first main axis and the second main axis; S200: Fasten the ends of the first rope and the second rope to the end of the third main shaft to complete the construction of the core mold frame structure; S300: Put the airbag on the outside of the core mold frame, fix the two ends, and inflate the airbag until it is full and sealed. The assembly of the core mold is completed and the core mold can be used to cast concrete sheet piles.

9. The method for using the hollow sheet pile core mold according to claim 8, characterized in that: The following steps are also included: S400: After the sheet piles are poured, the core mold is deflated, the steel rope is untied and pulled, the upper support rod and the lower support rod are leveled, the air bag is vacuumed to separate it from the inner wall of the concrete, and then the mold frame and the air bag are dragged out as a whole, thereby completing the disassembly of the core mold.

10. The method for using the hollow sheet pile core mold according to claim 9, characterized in that: In steps S100 and S200, before pouring the pile foundation, the first rope is pulled to drive the upper support rod to stand up, perpendicular to the plane formed by the first main axis and the second main axis, and then the first rope is fastened to the two ends of the third main axis; then the second rope is pulled to drive the lower support rod to stand up, perpendicular to the plane formed by the first main axis and the second main axis, and then the second rope is fastened to the two ends of the third main axis; In step S400, after the sheet pile production is completed, the airbag is deflated, and then the upper support rod is pulled to the right by the first rope until it lies flat on the right; similarly, the lower support rod is pulled to the left by the second rope again until it lies flat on the left; the airbag is then evacuated to shrink the airbag so that it can be separated from the inner wall of the sheet pile cavity, and finally the core mold is pulled out from the inner wall of the cavity.

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