CN209832125U - Special-shaped pile mould - Google Patents

Abstract

The utility model provides a heterotypic stake mould, including dismantled and assembled rectangular form mould shell and the end plate that is located the mould shell both ends, the mould shell has at least one mould shell section, each mould shell section has two at least mould shell section units, each mould shell section unit has at least one mould shell section unit heterotypic portion that is not parallel and level for mould shell section unit inner wall base plane, wherein adjacent mould shell section unit structure is the same, and the coordinate azimuth inequality in the mould shell central line vertical plane of the corresponding inner wall base plane of adjacent mould shell section unit, make obtain the accommodation space of shaping heterotypic stake behind the end plate compound die at mould shell and both ends.

Description

Special-shaped pile mould

Technical Field

The utility model relates to a building trade prefab technical field, and in particular to heterotypic stake mould.

Background

Concrete piles are common basic building materials in the fields of construction, traffic and harbor construction, and the existing concrete piles are generally manufactured by adopting a special pile mould in a factory or a construction site by a pre-forming method. Concrete piles manufactured by the traditional pile mould are generally linear square piles or circular pipe piles in appearance. Although the linear prestressed concrete pile has good anti-cracking performance and anti-seismic performance, the outer wall surface of the concrete pile body is a smooth circular surface or a rectangular surface, so that the friction between the pile body and a soil body is small, the pulling resistance and the bearing capacity of the pile body are small, when the large bearing capacity is required to be met, the length, the pile diameter or the number of the piles need to be increased, and the manufacturing cost of the whole pile foundation engineering can be increased.

In order to improve the pulling resistance of the pile body, a special-shaped pile mould is appeared on the market at present, and the cross section of the pile body of the prestressed concrete pile manufactured by the special-shaped pile mould is non-circular or non-square in outer contour. For example, the prefabricated concrete special-shaped pile disclosed in the chinese patent CN 102776880A has a groove continuously arranged along the axial direction, and the groove enlarges the specific surface area of the pile body, thereby greatly increasing the side friction force between the pile body and the soil body, and improving the uplift bearing capacity of the pile body. For further improving the resistance to plucking of the pile body, chinese patent CN 104358254B discloses a variable cross-section hollow square pile, which comprises a square pile body, wherein the square pile body comprises large-section square piles and small-section square piles which are arranged alternately, the large-section square piles and the small-section square piles enable the square pile body to form a concave-convex shape, and the concave-convex parts of the pile body block the soil body through occlusion, so that the friction between the square pile body and the soil is greatly improved, and the vertical resistance to plucking bearing capacity of the square pile body is greatly improved. However, in the variable cross-section pile, the diameters of the large-section pile body unit and the small-section pile body unit are different, and the bearing capacity of the two pile body units is greatly different, which affects the structural stability of the pile body to a certain extent.

In summary, although the existing special-shaped pile mold forms a prestressed concrete pile superior to the conventional linear prestressed concrete pile in the pulling resistance, the stability of the pile body is affected, i.e., the pulling resistance and the stability cannot be simultaneously considered.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the big problem of each pile body unit bearing capacity difference in the variable cross-section stake that current abnormal shape stake mould formed, provide an abnormal shape stake mould, the abnormal shape stake that forms behind this abnormal shape stake mould compound die is similar in the bearing capacity of each pile body unit when guaranteeing pile shaft resistance to plucking nature requirement.

The utility model provides a heterotypic stake mould, including dismantled and assembled rectangular form mould shell and the end plate that is located the mould shell both ends, the mould shell has at least one mould shell section, and each mould shell section has two at least mould shell section units, each mould shell section unit have at least one for mould shell section unit heterotypic portion of mould shell section unit that mould shell section unit inner wall base plane is not the parallel and level, and wherein adjacent mould shell section unit structure is the same, and the coordinate azimuth inequality in the mould shell central line vertical plane of the corresponding inner wall base plane of adjacent mould shell section unit makes obtain the accommodation space of shaping heterotypic stake behind the end plate compound die at mould shell and both ends.

According to an embodiment of the utility model, the mould shell includes the mould shell body and is fixed in the mould shell gasket of mould shell body inner chamber, the mould shell gasket has the profile that matches with stake body section unit abnormal shape portion mutually.

According to an embodiment of the present invention, the mold shell has at least two mold shell components of a whole that can function independently, wherein at least one mold shell component of a whole that can function independently is provided with the abnormal shape portion of mold shell section unit.

According to an embodiment of the utility model, the special-shaped portion of mould section unit is for the mould section unit convex part of mould section unit inner wall base plane evagination or for the mould section unit concave part of mould section unit inner wall base plane indent.

According to the utility model discloses an embodiment, the cross section of the accommodation space that the inner wall obtained behind the end plate compound die at mould shell and both ends is the polygon, and mould shell section unit abnormal shape portion is for the mould shell section unit convex part for mould shell section unit inner wall base plane evagination or for the mould shell section unit concave part of mould shell section unit inner wall base plane indent, the length of mould shell section unit convex part or the length of mould shell section unit concave part are not more than the length of mould shell section unit inner wall base plane, the width of mould shell section unit convex part or the width of mould shell section unit concave part are not more than the width of mould shell section unit inner wall base plane.

According to the utility model discloses an embodiment, mould shell section unit abnormal shape portion is for the mould shell section unit convex part for mould shell section unit inner wall base plane evagination, the length of mould shell section unit convex part is less than the length that corresponds mould shell section unit inner wall base plane, and the length of mould shell section unit convex part is greater than the length of mould shell section unit convex part tip to mould shell section unit tip.

According to the utility model discloses an embodiment, mould shell section unit abnormal shape portion is for the mould shell section unit convex part of the evagination of mould shell section unit inner wall base plane, the average depth or the maximum depth of mould shell section unit convex part are 1/15 ~ 1/30 of the width of the accommodation space of corresponding mould shell section unit department.

According to the utility model discloses an embodiment, mould shell section unit abnormal shape portion is for the mould shell section unit convex part of mould shell section unit inner wall base plane evagination, the section line of mould shell section unit convex part in mould central line direction is multistage straight line or pitch arc.

According to the utility model discloses an embodiment, the section line of mould shell section unit convex part at mould central line direction constitutes trapezoidal profile, just contained angle between mould shell section unit convex part tip lateral wall and the inner wall base face that corresponds the mould shell section unit is more than or equal to 90 degrees and is less than 180 degrees.

According to an embodiment of the present invention, the special-shaped portion of the formwork section unit has at least one or more convex ridges extending along the axial direction of the formwork section unit, and both ends of each convex ridge extend to both ends of the special-shaped portion of the formwork section unit; or the special-shaped part of the membrane shell section unit is provided with at least one or more circumferential ring grooves or ring platforms.

To sum up, the utility model provides an among the heterotypic pile mould, make to have stake body section unit heterotypic portion on the heterotypic stake after the shaping through set up the mould shell section unit heterotypic portion that is not parallel and level with mould shell section unit inner wall base plane in each mould shell section unit. Each pile body section unit in the special-shaped pile is provided with a pile body section unit special-shaped part which is not flush with a pile body base surface of the pile body section unit, and the specific surface area of the pile body section unit is increased due to the arrangement of the pile body section unit special-shaped part. When the pile body is sunk into the foundation, soil in the foundation can be embedded into the special-shaped part of the pile body section unit, so that the side friction force of the pile body is improved. Each pile body section is provided with at least two pile body section units, the adjacent pile body section units have the same structure, the coordinate azimuth angles of the corresponding pile body base planes of the adjacent pile body section units in the vertical plane of the central line of the pile body are unequal, the step is arranged in the special-shaped part of each pile body section unit or formed between the special-shaped part of each pile body section unit and the pile body base plane of the adjacent pile body section unit, when the pile body is sunk into the foundation, the step vertically blocks the soil body embedded into the special-shaped part of the pile body section unit, so that the vertical uplift bearing capacity of the pile body is increased, and the uplift resistance of the pile body is ensured. Further, because the adjacent pile body section units have the same structure, the bearing capacity of each unit is completely the same on the whole pile body. The utility model provides a heterotypic stake is fine when guaranteeing resistance to plucking performance has solved the inconsistent problem of traditional bamboo joint stake large cross section pile body unit and small cross section pile body unit bearing capacity. Further, the same structure of each pile body section unit on the pile body also makes when adopting pile embracing technology to carry out construction, to different pile body section units, pile embracing machine only need rotate certain angle pile embracing can, need not to change the centre gripping interval of embracing the pile arm, the problem that pile embracing made mistakes can not appear.

Furthermore, the formwork comprises a formwork body and a formwork gasket fixed in the inner cavity of the formwork body, the formwork gasket has a contour matched with the special-shaped part of the pile body section unit, the arrangement enables the formwork gasket to be replaced according to the shapes of the different special-shaped parts of the pile body section unit when the concrete special-shaped pile is prefabricated, and the use is very convenient. And further, the mould shell body can use a traditional polygonal pile mould body or a tubular pile mould body without independent customization.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic structural view of a special-shaped pile mold according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line C-C of fig. 1.

Fig. 3 is an enlarged schematic view of a membrane shell segment configuration of fig. 2.

Fig. 4 is an enlarged schematic view of fig. 3 at E.

Fig. 5 is a schematic structural view of the deformed pile mold shown in fig. 1 after the end plate and the membrane shell are disassembled.

Fig. 6 is a schematic structural view of the profiled pile formed by the profiled pile mould shown in fig. 1.

Figure 7a shows a front view of the profiled pile shown in figure 6.

Figure 7b shows an axial section through the profiled pile shown in figure 6;

fig. 8 is an enlarged view of a pile section at F in fig. 6.

Fig. 9 is an enlarged schematic view at G in fig. 7 a.

Fig. 10 is a partial schematic view of a special-shaped pile according to a second embodiment of the present invention.

Fig. 11 is a partial schematic view of a special-shaped pile provided by the third embodiment of the present invention.

Fig. 12 is a schematic structural view of a cross section of a special-shaped pile according to a fourth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

In the embodiment of the present invention, the term "more" is 2 or more than 2, and "more" or "less" or "within" or "up" includes the number, and "more than" does not include the number, and the following does not indicate separately.

Example one

The embodiment provides a special-shaped pile mold, which comprises a detachable strip-shaped mold shell A (split mold, generally an upper mold shell and a lower mold shell) and end plates B positioned at two ends of the mold shell A, wherein the mold shell A is provided with a plurality of mold shell sections A1, each mold shell section A1 is provided with at least two mold shell section units, each mold shell section unit is provided with at least one mold shell section unit special-shaped part which is not parallel and level relative to the inner wall base surfaces of the mold shell section units, the adjacent mold shell section units have the same structure, and the coordinate azimuth angles of the corresponding inner wall base surfaces of the adjacent mold shell section units in the vertical plane of the mold shell center line are not equal, so that a containing space of a special-shaped pile is obtained after the mold shell A and the end plates B. The coordinate azimuth refers to an included angle between a certain straight line and a coordinate main shaft (X axis) in a plane rectangular coordinate system, and the included angle is from 0 to 360 degrees in the clockwise direction from the X axis. For convenience, it will be simply stated that there is a corner between the two mold shell segments (as will be understood by those skilled in the art, the corner is merely expressed as the angular difference between the two in terms of spatial layout, and is not intended to limit the manner of production or assembly between the two).

In this embodiment, as shown in FIGS. 1-4, formwork A has a plurality of formwork sections A1, each formwork section A1 includes two formwork section units, a first formwork section unit A11 and a second formwork section unit A12. The shell section unit shaped portion on the first shell section unit a11 is a first shell section unit shaped portion a111, and the shell section unit shaped portion on the second shell section unit a12 is a second shell section unit shaped portion a 121. However, the present invention is not limited to this. In other embodiments, the formwork of the profiled pile mould may have only one formwork section, and each formwork section may also have more than three formwork section units.

In this embodiment, as shown in fig. 5, each formwork a includes a formwork body a10 and a formwork gasket (block) a20, and the formwork gasket a20 is detachably fixed to an inner cavity of the formwork body a10, and the formwork gasket a20 has a contour matching with the profiled portion of the pile section unit of the profiled pile. The formwork gasket A20 can be detachably arranged, so that the formwork gasket can be replaced according to the shapes of different pile body section unit special-shaped parts when the concrete special-shaped pile is prefabricated, and the use is very convenient. And further, the mould shell body can be a traditional polygonal pile mould body or a tubular pile mould body, and independent customization is not needed. However, the present invention is not limited to this. In other embodiments, the profile matching the special-shaped part of the pile section unit can be directly arranged on the inner wall of the formwork, that is, the special-shaped part of the pile section unit can be directly formed by arranging a groove or a boss on the inner wall of the formwork body.

In one embodiment, the interior cavity of the formwork is a square cavity. However, the present invention is not limited to this. In other embodiments, the interior of the formwork can be circular or polygonal. In this embodiment, the first form section unit profiled portion A111 is a form section unit convex portion that is convex relative to a first form section unit inner wall base surface. Similarly, the second form section unit profile portion A121 is a form section unit projection that is convex relative to an inner wall base of the second form section unit A12. However, the present invention is not limited to this. In other embodiments, the form section unit profiled portion can be a form section unit recess that is recessed relative to a form section unit interior wall base.

In this embodiment, the second form section unit A12 is rotated 90 degrees and then attached to the first form section unit A11. However, the present invention is not limited to the angle of rotation of the second form section unit, and the rotation of the second form section unit a12 is such that the base of the first form section unit shaped portion a111 is not coplanar with the base of the second form section unit shaped portion a 121. In other embodiments, when the shaped pile is a regular triangle pile, the rotation angle of the second formwork section unit is 60 degrees. Or when the special-shaped pile is a regular polygon pile with more than five polygons, the rotation angle of the second formwork section unit is an integral multiple of the inner angle of the regular triangle or the corresponding regular polygon.

In this embodiment, the formwork body a10 has four formwork sections, as shown in fig. 5, a first formwork section a10-1 and a third formwork section a10-3 are disposed opposite to each other and both have a first formwork section unit profile portion a 111. The second formwork section A10-2 and the fourth formwork section A10-4 are arranged oppositely and both have a second formwork section unit special-shaped part A121. However, the present invention is not limited to this. As shown in FIG. 5, the second membrane shell split body A10-2 is provided with two concrete pumping ports A10-2-1 arranged along the length direction of the membrane shell. However, the present invention does not limit the number of concrete pumping ports and the positions thereof. In other embodiments, the number of the concrete pumping ports may be one or more than three, and the concrete pumping ports may also be disposed on the first membrane shell division body, the third membrane shell division body, and the fourth membrane shell division body.

The first form section unit a11 has two first form section unit profile portions a111 thereon and the two first form section unit profile portions a111 are formed on two opposing interior walls of the first form section unit a11, respectively. The second form section unit A12 has the same configuration as the first form end unit A11, and also includes two oppositely disposed second form section unit profile portions A121, the spatial arrangement orientation of the two second form section unit profile portions A121 being different from the spatial arrangement orientation of the two first form section unit profile portions A111. However, in other embodiments, two first form section unit profiles A111 and two second form section unit profiles A121 can be formed on adjacent interior walls of the respective form section units. The profiled parts of the formwork section units are particularly arranged on opposite side walls or adjacent side walls of the corresponding formwork section units, which the present invention is not limited to.

Further, in this embodiment, the length of the first form section unit shaped portion a111 is less than the length of the inner wall base of the first form section unit a11 and the length of the first form section unit shaped portion a111 is greater than the length from the end of the first form section unit shaped portion a111 to the end of the first form section unit a 11. Further, the width of the corresponding first form section unit special-shaped portion a111 is equal to the width of the pile body base surface of the first form section unit a 11. However, the present invention is not limited to this. In other embodiments, both ends of the shaped portion of the first form section unit and both ends of the shaped portion of the second form section unit can extend to both ends of the first form section unit and both ends of the second form section unit along the length direction of the mold, respectively, i.e., the lengths of the shaped portions of the two form section units are equal to the lengths of the corresponding form section units. Alternatively, in other embodiments, the width of the profiled portion of the first form section unit and the width of the profiled portion of the second form section unit can be less than the width of the corresponding interior wall base of the form section unit. Further, a plurality of formwork convex ridges a113 extending along the axial direction of the formwork section units are formed on the special-shaped part of the first formwork section unit and the special-shaped part of the second formwork section unit, and can be also arranged into a ring groove.

Further, to facilitate demolding of the pile body, as shown in fig. 4, a trapezoidal profile formed by section lines of the first form section unit special-shaped portion a111 and the second form section unit special-shaped portion a121 in the direction of the mold center line is provided, and an included angle between an end side wall of the first form section unit special-shaped portion a111 and an inner wall base plane of the corresponding form section unit a11 is 145 degrees. Similarly, the angle between the end sidewall of the second form section unit profile A121 and the base of the inner wall of the corresponding form section unit A12 is also 145 degrees.

Further, when designing the pile structure, the balance between the pile thickness of the pile and the blocking force of the step also needs to be considered. The larger the height of the first membrane shell section unit special-shaped part and the second membrane shell section special-shaped part is, the larger the vertical blocking force which can be provided by the step on the special-shaped pile formed behind the membrane is, but the pile thickness of the corresponding pile section unit is reduced, and the stability of the pile body is influenced. In this embodiment, the maximum height tmax of the first and second form section unit profile portions A111 and A121 is set to be the width T of the receiving space at the corresponding form section unit

1/15-1/30. Preferably, the maximum height tmax is set at 1/20 of the width T of the receiving space.

As shown in fig. 6 to 7b, the special-shaped pile mold provided in this embodiment forms a special-shaped pile after mold assembly, a pile body of the special-shaped pile has at least one pile body section, each pile body section has at least two pile body section units, each pile body section unit has at least one pile body section unit special-shaped portion that is not flush with a pile body base surface of the pile body section unit, adjacent pile body section units have the same structure, and coordinate azimuth angles of corresponding pile body base surfaces of the adjacent pile body section units in a vertical plane of a pile body center line are not equal. For convenience, the following is simply expressed as a corner between two piles (it will be understood by those skilled in the art that the corner is only expressed as an angle difference between the two piles in the spatial layout range, and does not limit the production or assembly manner between the two piles).

In the present embodiment, the body of the special-shaped pile has a plurality of pile sections 1, and each pile section 1 has two pile section units, namely a first pile section unit 11 and a second pile section unit 12. Correspondingly, the pile section unit special-shaped portion on the first pile section unit 11 is a first pile section unit special-shaped portion 111, and the second pile section unit special-shaped portion on the second pile section unit 12 is a second pile section unit special-shaped portion 121. However, the present invention is not limited to this. In other embodiments, the pile body of the profiled pile may have only one pile body segment, and each pile body segment may also have more than three pile body segment units.

In this embodiment, as shown in fig. 6, the special-shaped pile is a square pile, which includes a plurality of pile body segment units connected in sequence and in a strip shape. However, the present invention is not limited to this. In other embodiments, the shaped piles may be circular piles or other polygonal piles. It should be noted that the connection of pile body segments or the connection of pile body segment units in the embodiments of the present invention refers to the static connection (specifically, one-piece forming) of these pile body segments or pile body segment units, and does not refer to the dynamic connection of multiple pile bodies or pile bodies into one body. For convenience of description, the following description focuses on the structure of one of the pile body segment units in the profile pile with reference to fig. 8.

In this embodiment, the first pile section unit special-shaped portion 111 is a pile section unit concave portion (e.g., a trapezoid profile surface in fig. 8) recessed relative to a pile body base surface (e.g., an i-shaped surface in fig. 8) of the first pile section unit 11. Likewise, the second pile section unit profile 121 is a pile section unit recess that is recessed relative to the pile base of the second pile section unit 12. However, the present invention is not limited to this. In other embodiments, the pile section unit profile may be a pile section unit protrusion protruding out of the pile base surface of the pile section unit.

In this embodiment, as shown in fig. 6 and 8, the first pile section unit 11 has two first pile section unit profiles 111 thereon and the two first pile section unit profiles 111 are respectively formed on two opposite sides of the first pile section unit 11. The second pile section unit 12 has the same structure as the first pile section unit 11, and also includes two oppositely disposed second pile section unit profiles 121, and the spatial arrangement orientation of the two second pile section unit profiles 121 is different from the spatial arrangement orientation of the two first pile section unit profiles 111, and is represented by a 90-degree difference in fig. 8. At this time, if the coordinate azimuth angles of the pile body base planes where the two first pile body section unit special-shaped portions 111 are located in the vertical plane of the pile body center line are 0 degree and 180 degrees, the azimuth angles of the pile body base planes where the two second pile body section unit special-shaped portions 121 are located in the vertical plane of the pile body center line are 90 degrees and 360 degrees, that is, the coordinate azimuth angles of the pile body base planes where the first pile body section unit special-shaped portions are located and the pile body base planes where the second pile body section unit special-shaped portions are located are not equal. However, in other embodiments, two first pile section unit profiles 111 and two second pile section unit profiles 121 may also be formed on two adjacent sides of the corresponding pile section unit. These pile body section unit profiles are specifically arranged on opposite or adjacent sides of the respective pile body section units, to which the present invention is not limited.

In the present embodiment, the special-shaped pile is a square pile, so the second pile section unit 12 is rotated by 90 degrees and then connected to the first pile section unit 11. However, the present invention does not limit the rotation angle of the second pile section unit. The second pile section unit is rotated to realize that the base surface of the first pile section unit special-shaped part is not coplanar with the base surface of the second pile section unit special-shaped part. In other embodiments, when the profiled pile is a regular triangle pile, the rotation angle of the second pile section unit is 60 degrees. Or when the special-shaped pile is a regular polygon pile with more than five polygons, the rotation angle of the second pile body section unit is integral multiple of the internal angle of the regular triangle or the corresponding regular polygon.

The profiled pile provided by the embodiment is provided with each pile body as a first pile body section unit 11 and a second pile body section unit 12 which have the same structure and different spatial arrangement orientations. The first pile body section unit 11 is provided with a first pile body section unit special-shaped part 111 which is concave relative to the pile body base surface of the first pile body section unit 11, the specific surface area of the first pile body section unit 11 is increased due to the arrangement of the first pile body section unit special-shaped part 111, and when the pile body is sunk into a base, the specific surface area of the pile body increased by the first pile body section unit special-shaped part 111 increases the side friction between the side wall of the pile body and the soil body, so that the pulling resistance of the pile body is improved. Further, since the first pile section unit profiled portion 111 is recessed with respect to the pile body base surface of the first pile section unit 11, a first step 112 is formed on the first pile section unit; likewise, a second step 122 is also formed on the second pile section unit 12. When the special-shaped pile is sunk into the base, soil in the base is embedded into the special-shaped part 111 of the first pile body section unit and the special-shaped part 121 of the second pile body section unit, and at the moment, the first step 112 and the second step 121 respectively provide blocking force in the vertical direction for the embedded soil, so that the pulling resistance of the special-shaped pile is further improved through the blocking force, namely the special-shaped pile provided by the embodiment has good pulling resistance. Furthermore, because the first pile body section unit 11 and the second pile body section unit 12 have the same shape but different spatial layout orientations, each pile body section unit has the same bearing capacity, the whole pile body realizes the consistency of the bearing capacity of each unit on the pile body on the premise of ensuring the required uplift resistance, and the stability of the pile body structure is greatly improved. As each pile body section unit has higher structural strength compared with the small-diameter part of the original variable cross-section pile, the shearing resistance of the pile body is also improved on the basis of ensuring the pulling resistance.

In addition, the diameter of the large-section pile body unit is different from that of the small-section pile body unit, and the length of the two pile body units is different, and the length of the small-section pile body unit is usually far greater than that of the large-section pile body unit. The variable cross-section precast pile is generally driven by a pile embracing method, and the pile embracing position of a pile embracing machine is a large cross-section pile body unit during construction. Because the soil layer condition differs when piling, it has the difference to lead to advancing stake length and pile body bounce-back condition at every turn, and big cross-section pile body unit will probably no longer be in the pile embracing position of setting for after piling many times, appears the problem that pile embracing position made mistakes from this: if all pile holding positions are small-section pile body units, the pile body can not be held tightly; if the pile holding position is the combination position of the large-section pile body unit and the small-section pile body unit, the pile body of the combination part is damaged due to uneven stress. This embodiment is different from this, because the structure of first pile body section unit 11 and second pile body section unit 12 is the same completely and the reference surface of first pile body section unit abnormal shape portion 111 and the reference surface of second pile body section unit abnormal shape portion 121 are not coplane, there is no longer the pile body size difference of big cross-section pile body unit and small cross-section pile body unit in the pile body structure, so hold the stake machine need not to distinguish and hold big cross-section pile body unit or hold small cross-section pile body unit when adopting the pile-embracing method to carry out construction, only need rotate corresponding angle (the square pile is 90 degrees) on adjacent pile body and can realize holding the stake, the problem that the pile-embracing made mistakes because of the pile body diameter difference can not appear. The pile is very simple, and complex pile design is not needed.

In this embodiment, the length of the first pile section unit special-shaped portion 111 is smaller than the length of the first pile section unit 11, and the length of the first pile section unit special-shaped portion 111 is greater than the length from the end of the first pile section unit special-shaped portion 111 to the end of the first pile section unit 11. Further, the width of the first pile section unit special-shaped part 111 is equal to the width of the pile body base surface of the first pile section unit 11; the specific surface area of the pile body is increased to the maximum extent, demolding is facilitated, and the difficulty in mold design is facilitated to be simplified. However, the present invention is not limited to this. As shown in the second embodiment, two ends of the first pile section unit special-shaped portion and two ends of the second pile section unit special-shaped portion extend to two ends of the first pile section unit and two ends of the second pile section unit respectively along the length direction of the pile body, that is, the lengths of the two pile section unit special-shaped portions are equal to the lengths of the corresponding pile section units. Alternatively, in other embodiments, the width of the first pile section unit profile and the width of the second pile section unit profile may be less than the width of the corresponding pile section unit pile base.

Further, corresponding to the ridge a113 of the membrane shell, the first pile body section unit special-shaped portion 111 and the second pile body section unit special-shaped portion 121 are provided with a plurality of ridges 113 extending along the axial direction of the pile body, and the arrangement of the ridges 113 can further increase the specific surface area of the pile body, thereby further improving the uplift resistance of the pile body. Of course, the longitudinal ridges 113 may be configured as transverse circumferential grooves or transverse lands.

The prestressed concrete pile is manufactured by pouring concrete in a mould in modes of material distribution, pumping and the like, and demoulding the mould after the concrete is solidified to finally form the prestressed concrete pile. Therefore, demoulding is required to be considered when the pile body structure of the special-shaped pile is designed. In this embodiment, as shown in fig. 9, the section lines of the first pile section unit special-shaped portion 111 and the second pile section unit special-shaped portion 121 in the direction of the pile body center line form a trapezoidal outline, and the included angle θ between the end side wall of the first pile section unit special-shaped portion 111 and the end side wall of the second pile section unit special-shaped portion 121 and the pile body base surface of the corresponding pile section unit is greater than or equal to 90 degrees and less than 180 degrees. The larger the included angle theta is, the easier the demoulding is; correspondingly, however, the vertical blocking force provided by the step on the pile section unit will be weaker, so that a balance between the two needs to be found. Preferably, as shown in fig. 9, the included angle θ is 145 degrees. However, the present invention is not limited to this. In other embodiments, the included angle θ may be greater than or equal to 90 degrees and smaller than other angle values within 180 degrees, such as 150 degrees or 120 degrees.

And the maximum depth dmax of the first pile section unit special-shaped part 111 and the maximum depth dmax of the second pile section unit special-shaped part 121 on the special-shaped pile are 1/15-1/30 of the corresponding pile section unit pile thickness D, corresponding to the maximum height tmax of the first formwork section unit special-shaped part A111 and the maximum height tmax of the second formwork section unit special-shaped part A121. Preferably, the maximum depth dmax is set to 1/20 of the pile thickness D. However, the present invention is not limited to this. In other embodiments, the maximum depth dmax may be other values within 1/15-1/30 of the pile thickness D. Alternatively, in other embodiments, the average depth of the first pile section unit profile and the average depth of the second pile section unit profile may be defined to be 1/15-1/30 corresponding to the thickness of the pile of the corresponding pile section unit.

Example two

The present embodiment is the same as the first embodiment and its variation structure, and the difference is: the length of the special-shaped part of the first formwork section unit is equal to the length of the inner wall base surface of the first formwork section unit, and the structure of the second formwork section unit is the same as that of the first formwork end unit. Correspondingly, as shown in fig. 10, in the special-shaped pile formed by closing the special-shaped pile mold according to this embodiment, two ends of the special-shaped portion 111 of the first pile section unit extend to two ends of the first pile section unit 11, and two ends of the special-shaped portion 121 of the second pile section unit extend to two ends of the second pile section unit 12, that is, the length of the special-shaped portion of the pile section unit is equal to the length of the pile section unit. The second pile section unit 12 is connected to the first pile section unit 11 after rotating 90 degrees, which causes a first step 112 to be formed between the first pile section unit profile 111 and the pile base of the second pile section unit 2, and a second step 122 to be formed between the second pile section unit profile 121 and the pile base of the first pile section unit 11. Therefore, pile sections (similar to sections in bamboo joint piles, the section perimeter is larger than other parts) do not exist between the two pile body section units, and the pile embracing design is simpler and more convenient. In this embodiment, the first pile section unit special-shaped portion 111 and the second pile section unit special-shaped portion 121 also increase the specific surface area of the special-shaped pile, thereby improving the friction force of the pile body; the first step 112 and the second step 122 also provide vertical blocking force for soil bodies embedded in the special-shaped portions, and the special-shaped piles have good pulling resistance. Further, in this embodiment, first pile body section unit 11 and second pile body section unit 12 structure are the same completely, not only have the same bearing capacity between two pile body section units and embrace the stake machine when embracing the stake also only need rotate 90 degrees after can realize embracing the stake, the pile body need not to carry out complicated embracing the stake design, and this kind of mode conveniently designs mould structure and drawing of patterns mode also is more simple and convenient.

EXAMPLE III

This embodiment is substantially the same as the first embodiment and its modified structure, except that: the first membrane shell section unit is provided with a first membrane shell section unit special-shaped part, the second membrane shell section unit is also provided with a second membrane shell section unit special-shaped part, and the second membrane shell section unit is connected with the first membrane shell section unit after rotating 180 degrees. The special-shaped pile mold provided by the embodiment is clamped to form the special-shaped pile as shown in fig. 11.

Specifically, the first pile section unit 11 has a first pile section unit profile 111; likewise, the second pile section unit 12 also has only one second pile section unit profile 121. The second pile section unit 12 is rotated 180 degrees and then connected to the first pile section unit 11, and the side of the pile where the first pile section unit special-shaped portion 111 is located is parallel to the side of the pile where the second pile section unit special-shaped portion 121 is located. At this time, if the coordinate azimuth angle of the pile body base plane on which the first pile body section unit special-shaped portion is located in the vertical plane of the pile body center line is 0 degree, the azimuth angle of the pile body base plane on which the second pile body section unit special-shaped portion is located in the vertical plane of the pile body center line is 180 degrees, that is, the two coordinate azimuth angles are not equal.

Because the first pile body section unit special-shaped part 111 is concave relative to the pile body base surface of the first pile body section unit, a first step 112 is formed between the first pile body section unit special-shaped part and the first pile body section unit; similarly, a second step 122 is also formed between the second pile section unit profile 121 and the pile body base of the second pile section unit 12. In this embodiment, the first pile section unit special-shaped portion 111 and the second pile section unit special-shaped portion 121 also increase the specific surface area of the special-shaped pile, thereby improving the friction force of the pile body; the first step 112 and the second step 122 also provide vertical blocking force for soil bodies embedded in the special-shaped portions, and the special-shaped piles have good pulling resistance. Further, in this embodiment, the first pile section unit 11 and the second pile section unit 12 have the same structure, and both units have the same bearing capacity, and when embracing a pile, the pile embracing machine only needs to rotate 90 degrees and then move transversely by a small amplitude, so that the pile embracing can be realized, and the pile body does not need to carry out a complicated pile embracing design; furthermore, the mode is convenient for designing the die structure and the demoulding mode is simple.

In addition, the embodiment of the present invention can also be other numbers of special-shaped parts, and it is sufficient to ensure that the special-shaped parts with the same serial number in the pile body section unit have a spatial azimuth difference.

Example four

This embodiment is substantially the same as the first embodiment and its variations, except that: the inner cavity of the mould shell in the special-shaped pile mould is a circular inner cavity. Correspondingly, as shown in fig. 12, the special-shaped pile formed after the mold closing is a circular pile. In this embodiment, the first pile section unit 11 has two first pile section unit profile portions 111; likewise, the second pile section unit has two second pile section unit profiles thereon (not shown for reasons of perspective).

The second pile section unit is rotated 90 degrees and then connected to the first pile section unit 11. However, the rotation angle of the second pile section unit of the present invention is not limited. In other embodiments, when the profiled pile is a circular pile, the second pile section unit can rotate by other angle values within more than 0 degrees and less than 90 degrees. Alternatively, in other embodiments, when only one first pile section unit profile is provided on the first pile section unit and only one second pile section unit profile is provided on the second pile section unit, the second pile section unit can rotate more than 0 degrees and less than other angular values within 360 degrees, such as 30 degrees, 45 degrees, 180 degrees, etc.

In this embodiment, the first pile section unit special-shaped portion 111 and the second pile section unit special-shaped portion also increase the specific surface area of the special-shaped pile, thereby improving the side friction force of the pile. The first step 112 formed between the first pile body section unit special-shaped part 111 and the pile body base surface of the first pile body section unit 11 and the second step formed between the second pile body section unit special-shaped part and the pile body base surface of the first pile body section unit can also provide vertical blocking force for soil bodies embedded into the special-shaped parts, and the special-shaped pile has good uplift resistance. Further, in this embodiment, the first pile body section unit 11 and the second pile body section unit 12 have the same structure, the two units have the same bearing capacity, and the pile embracing machine can embrace a pile only by rotating 90 degrees when embracing the pile, and the pile body does not need to carry out a complicated pile embracing design; furthermore, the mode is convenient for designing the die structure and the demoulding mode is simple.

To sum up, the utility model provides an among the heterotypic pile mould, make to have stake body section unit heterotypic portion on the heterotypic stake after the shaping through set up the mould shell section unit heterotypic portion that is not parallel and level with mould shell section unit inner wall base plane in each mould shell section unit. Each pile body section unit in the special-shaped pile is provided with a pile body section unit special-shaped part which is not flush with a pile body base surface of the pile body section unit, and the specific surface area of the pile body section unit is increased due to the arrangement of the pile body section unit special-shaped part. When the pile body is sunk into the foundation, soil in the foundation can be embedded into the special-shaped part of the pile body section unit, so that the side friction force of the pile body is improved. The method is characterized in that each pile body section is provided with at least two pile body section units, the adjacent pile body section units have the same structure, the coordinate azimuth angles of the corresponding pile body base planes of the adjacent pile body section units in the vertical plane of the central line of the pile body are unequal, the step is formed in the special-shaped part of each pile body section unit or between the special-shaped part of each pile body section unit and the pile body base plane of the adjacent pile body section unit, and when the pile body is sunk into the foundation, the step vertically blocks the soil body embedded into the special-shaped part of the pile body section unit, so that the vertical uplift bearing capacity of the pile body is increased, and the uplift resistance of the pile body is ensured. Further, because the adjacent pile body section units have the same structure, the bearing capacity of each unit is completely the same on the whole pile body. The utility model provides a heterotypic stake is fine when guaranteeing resistance to plucking performance has solved the inconsistent problem of traditional bamboo joint stake large cross section pile body unit and small cross section pile body unit bearing capacity. Further, the same structure of each pile body section unit on the pile body also makes when adopting pile embracing technology to carry out construction, to different pile body section units, pile embracing machine only need rotate certain angle pile embracing can, need not to change pile embracing diameter, the problem that pile embracing made mistakes can not appear.

Furthermore, the formwork comprises a formwork body and a formwork gasket fixed in the inner cavity of the formwork body, the formwork gasket has a contour matched with the special-shaped part of the pile body section unit, the arrangement enables the formwork gasket to be replaced according to the shapes of the different special-shaped parts of the pile body section unit when the concrete special-shaped pile is prefabricated, and the use is very convenient. And further, the mould shell body can use a traditional polygonal pile mould body or a tubular pile mould body without independent customization.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The special-shaped pile mold is characterized by comprising a detachable strip-shaped mold shell and end plates positioned at two ends of the mold shell, wherein the mold shell is provided with at least one mold shell section, each mold shell section is provided with at least two mold shell section units, each mold shell section unit is provided with at least one mold shell section unit special-shaped part which is not parallel and level relative to the inner wall base planes of the mold shell section units, the adjacent mold shell section units have the same structure, and the coordinate azimuth angles of the corresponding inner wall base planes of the adjacent mold shell section units in the vertical plane of the center line of the mold shell are not equal, so that the mold shell and the end plates at two ends are matched to obtain an accommodating space for forming a special.

2. The profiled pile die of claim 1, wherein the formwork includes a formwork body and a formwork gasket secured to an inner cavity of the formwork body, the formwork gasket having a profile matching the profiled section of the pile section unit.

3. The profiled pile die of claim 1, wherein the formwork has at least two formwork sections, wherein at least one formwork section is provided with a formwork section unit profiled portion.

4. The profiled pile die of claim 1, wherein the profiled section of the shell section unit is a convex shell section unit part convex relative to the inner wall base surface of the shell section unit or a concave shell section unit part concave relative to the inner wall base surface of the shell section unit.

5. The special-shaped pile mold according to claim 1, wherein the cross section of the accommodating space obtained by the inner wall of the mold shell and the end plates at the two ends after the mold closing is a polygon, the special-shaped part of the mold shell section unit is a convex mold shell section unit convex part relative to the inner wall base surface of the mold shell section unit or a concave mold shell section unit concave part relative to the inner wall base surface of the mold shell section unit, the length of the convex mold shell section unit convex part or the length of the concave mold shell section unit concave part is not more than the length of the inner wall base surface of the mold shell section unit, and the width of the convex mold shell section unit convex part or the width of the concave mold shell.

6. The profiled pile die of claim 1, wherein the form section unit profiled portion is a form section unit convex portion that is convex with respect to a form section unit inner wall base surface, the form section unit convex portion has a length that is less than a length of a corresponding form section unit inner wall base surface, and the form section unit convex portion has a length that is greater than a length from an end of the form section unit convex portion to an end of the form section unit.

7. The profiled pile mould of claim 1, wherein the form section unit profiled part is a form section unit convex part protruding outwards relative to the inner wall base surface of the form section unit, and the average depth or the maximum depth of the form section unit convex part is 1/15-1/30 of the width of the accommodating space at the corresponding form section unit.

8. The profiled pile die of claim 1, wherein the form section unit profiled part is a form section unit convex part which is convex relative to the inner wall base surface of the form section unit, and the section line of the form section unit convex part in the direction of the center line of the die is a multi-section straight line or an arc line.

9. The profiled pile die of claim 8, wherein a section line of the convex part of the die shell section unit in the direction of the center line of the die forms a trapezoidal outline, and an included angle between the side wall of the end part of the convex part of the die shell section unit and the inner wall base plane of the corresponding die shell section unit is greater than or equal to 90 degrees and less than 180 degrees.

10. The profiled pile die of claim 1, wherein the profiled section of the form section unit has at least one or more form ridges extending axially along the membrane shell section unit, each form ridge having two ends extending to the two ends of the profiled section of the membrane shell section unit; or the special-shaped part of the membrane shell section unit is provided with at least one or more circumferential ring grooves or ring platforms.