CN220225746U

CN220225746U - Prefabricated component of combined pressure-bearing platform

Info

Publication number: CN220225746U
Application number: CN202320944802.2U
Authority: CN
Inventors: 张帅; 申国奎; 吴杰; 丁菲; 陈蕾; 邓美龙
Original assignee: China Construction First Group Corp Ltd
Current assignee: China Construction First Group Corp Ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-12-22
Anticipated expiration: 2033-04-24

Abstract

The application relates to the technical field of constructional engineering, in particular to a prefabricated component of a combined type pressure-bearing platform. The wet joint comprises an upper step, a bottom step and a connecting surface, so that the leakage path of the leakage water is prolonged as a whole, and the effect of preventing the leakage water is achieved. In some embodiments of the application, the wet joint section after the improvement is divided into two steps along the vertical direction of the wet joint, the horizontal direction of the wet joint is through the mode that the bottom step is outwards chosen and is extended, the prefabricated parts on the left side and the right side are connected with the splicing surface through the bottom step left and right to realize sealing connection, thereby realizing the bottom die-free construction in the wet joint construction process, and accelerating the construction progress to a certain extent. Through the waterstop and the waterproof glue of the rubber material that splice face department set up, can prevent effectively that cast in situ concrete from pouring the thick liquid problem of leakage in-process, can improve the compactness of pouring post cast in situ concrete to a certain extent.

Description

Prefabricated component of combined pressure-bearing platform

Technical Field

The application relates to the technical field of constructional engineering, in particular to a prefabricated component of a combined type pressure-bearing platform.

Background

The statements in this section merely provide background information related to the present application and may not necessarily constitute prior art.

The wet joint is that the panel is prefabricated in blocks, for example, the wet joint is poured through a hanging die, reinforcing steel bars can be reserved at the wet joint in some modes, and the reinforcing steel bars are welded after being spliced. Wet joints are widely found in new and old concrete, steel-concrete, and like composite structures. When concrete is poured on the wet joint, a template is generally installed at the bottom, and conventionally, a scaffold or a hanging basket is erected below the wet joint to support the template at the wet joint. Because the wet joint is the joint between new and old concrete and steel-concrete, the contact surface can be loosened due to the reasons of concrete configuration, construction structure, construction process and the like, and the wet joint belongs to a water leakage and frequent region. For example, in some prior art methods of controlling such leakage are wet-joint concrete constructions, which enhance the roughening and water-spreading wetting of the wet-joint concrete. By adopting the measures to prevent and treat the leakage of the wet joint concrete, although a certain anti-leakage effect can be achieved, the problem of water leakage can not be solved fundamentally.

Disclosure of Invention

In view of this, the present application provides a prefabricated component of a combined pressure-bearing platform, so as to solve one or more technical problems in the related art or provide technical support for solving the technical problems, and the present application is implemented as follows:

In a first aspect, embodiments of the present application provide a prefabricated component comprising:

the heights of the upper steps, the bottom steps and the splicing surfaces are sequentially reduced, and the upper steps are lower than the upper table surface of the prefabricated part;

a connecting surface is formed between the upper step and the upper table top, one end part of the upper step is connected with the connecting surface, the other end part of the upper step extends towards the transverse direction far away from the connecting surface and is connected with one end part of the bottom step, the other end part of the bottom step extends towards the transverse direction far away from the upper step and is connected with the splicing surface, and the whole splicing surface extends downwards; the upper step and the bottom step are used for bearing cast-in-place concrete, the connecting surface is vertically or in a flaring shape so as to improve the concrete saturation after casting the cast-in-place concrete, and the splicing surface is used for being connected with the splicing surface of another prefabricated component in a matched mode.

In some embodiments, the splice face includes a recessed section recessed into the preform, or a protruding section protruding from the preform that mates with the recessed section, to extend the leak path of the leaking water.

In some embodiments, the splice face includes a recessed section recessed into the preform, the recessed section being an inner arc; or a convex section of the prefabricated component which is matched with the concave section and protrudes out, wherein the convex section is in an outer arc shape.

In some embodiments, the bottom step is rounded to increase the saturation of the concrete after casting the cast-in-place concrete.

In some embodiments, further comprising: the water stop plate extends vertically as a whole; the bottom of the water stop plate downwards penetrates through the upper step and is fixedly connected with the upper step, and the top of the water stop plate upwards penetrates through the upper step and is fixedly connected with the cast-in-place concrete.

In some embodiments, the bottom of the water stop plate is bent towards the direction of the connecting surface, so as to improve the firmness of the connection between the bottom of the water stop plate and the upper step and reduce the shrinkage generated by solidification of the cast-in-place concrete.

In some embodiments, the top of the water stop plate is bent towards the direction of the connecting surface, so that the firmness of the connection between the top of the water stop plate and the cast-in-place concrete is improved, shrinkage generated by solidification of the cast-in-place concrete is reduced, and a leakage path of leakage water is prolonged.

In some embodiments, further comprising: the upper connecting section of the reinforcing rib penetrates through and stretches out of the connecting surface, the lower connecting section of the reinforcing rib penetrates through and stretches out of the bottom step, the middle connecting section of the reinforcing rib connects the upper connecting section with the lower connecting section, and the middle connecting section is fixedly connected with the cast-in-place concrete after the cast-in-place concrete is solidified.

In some embodiments, the water stop plate is positioned between the upper connecting section, the lower connecting section and the middle connecting section; the top of the water stop plate is lower than the upper connecting section, the bottom of the water stop plate is higher than the lower connecting section, and the middle connecting section is far away from the water stop plate and is positioned above the bottom step so as to prevent the water stop plate from colliding with the reinforcing ribs.

In some embodiments, the splice face includes a recessed section recessed into the preform, the recessed section being of an inner arc shape, or a protruding section protruding from the preform that mates with the recessed section, the protruding section being of an outer arc shape;

the bottom steps are arc-shaped to improve the saturation of the concrete after the cast-in-place concrete is poured;

the water stop plate is integrally vertically extended, the bottom of the water stop plate downwards passes through the upper step and is fixedly connected with the upper step, and the top of the water stop plate upwards passes through the upper step and is fixedly connected with the cast-in-place concrete; the bottom of the water stop plate is bent towards the direction of the connecting surface, so that the firmness of connection between the bottom of the water stop plate and the upper step is improved, and shrinkage generated by solidification of the cast-in-place concrete is reduced; the top of the water stop plate is bent towards the direction of the connecting surface, so that the firmness of connection between the top of the water stop plate and the cast-in-place concrete is improved, shrinkage generated by solidification of the cast-in-place concrete is reduced, and a leakage path of leakage water is prolonged.

The upper connecting section of the reinforcing rib penetrates through and extends out of the connecting surface, the lower connecting section of the reinforcing rib penetrates through and extends out of the bottom step, the middle connecting section of the reinforcing rib connects the upper connecting section with the lower connecting section, and the middle connecting section is fixedly connected with the cast-in-place concrete after the cast-in-place concrete is solidified; the water stop plate is positioned among the upper connecting section, the lower connecting section and the middle connecting section; the top of the water stop plate is lower than the upper connecting section, the bottom of the water stop plate is higher than the lower connecting section, and the middle connecting section is far away from the water stop plate and is positioned above the bottom step so as to prevent the water stop plate from colliding with the reinforcing ribs;

the top of the water stop plate is connected with the bottom of the water stop plate through the middle of the water stop plate, and the middle of the water stop plate extends vertically.

In a second aspect, embodiments of the present application provide a modular pressure-bearing platform comprising a waterproof layer, cast-in-place concrete, and two prefabricated components paired; wherein each of the prefabricated elements comprises:

the heights of the upper steps, the bottom steps and the splicing surfaces are sequentially reduced, and the upper steps are lower than the upper table surface of the prefabricated part; a connecting surface is formed between the upper step and the upper table top, one end part of the upper step is connected with the connecting surface, the other end part of the upper step extends towards the transverse direction far away from the connecting surface and is connected with one end part of the bottom step, the other end part of the bottom step extends towards the transverse direction far away from the upper step and is connected with the splicing surface, and the whole splicing surface extends downwards; the upper stage is horizontally arranged or obliquely upwards arranged; the upper step and the bottom step are used for bearing the cast-in-place concrete, the connecting surface is vertically or flaring-shaped to improve the concrete saturation after the cast-in-place concrete is poured, the splicing surface is used for being connected with the splicing surface of the other matched prefabricated component, and the whole splicing surface is curved;

After the two splicing surfaces of the two prefabricated parts are spliced, the two connecting surfaces, the two upper steps, the two bottom steps and the cast-in-place concrete form wet joints; the waterproof layer is laid on the two upper table boards and the cured cast-in-place concrete.

In some embodiments, further comprising: the water stop is arranged between the spliced two spliced surfaces.

In some embodiments, the splice face of one of the preformed components includes a recessed section recessed into the preformed component, the recessed section being of an inner arc shape, and the splice face of the other mating of the preformed components includes a protruding section protruding from the preformed component that mates with the recessed section, the protruding section being of an outer arc shape to extend the leak path of the leaking water.

In some embodiments, after the two splicing surfaces of the two prefabricated components are spliced, the two bottom steps form a semicircle or a minor arc so as to improve the concrete saturation after the cast-in-place concrete is poured.

In some embodiments, each of the prefabricated elements further comprises:

the water stop plate extends vertically as a whole; the bottom of the water stop plate downwards passes through the upper step and is fixedly connected with the upper step, and the top of the water stop plate upwards passes through the upper step and is fixedly connected with the cast-in-place concrete;

The bottom of the water stop plate is bent towards the direction of the connecting surface, so that the firmness of connection between the bottom of the water stop plate and the upper step is improved, and shrinkage generated by solidification of the cast-in-place concrete is reduced;

the top of the water stop plate is bent towards the direction of the connecting surface, so that the firmness of the connection between the top of the water stop plate and the cast-in-place concrete is improved, shrinkage generated by solidification of the cast-in-place concrete is reduced, and a leakage path of leakage water is prolonged;

the water stop plate top is connected with the water stop plate bottom through the middle part of the water stop plate, the middle part of the water stop plate extends vertically, the included angle between the water stop plate top and the middle part of the water stop plate is alpha, the included angle between the water stop plate bottom and the middle part of the water stop plate is beta, and the included angle between the water stop plate bottom and the middle part of the water stop plate is 135 degrees or more and less than or equal to 150 degrees and 135 degrees or more and the beta is not more than 150 degrees.

In some embodiments, each of the prefabricated elements further comprises:

the upper connecting section of the reinforcing rib penetrates through and extends out of the connecting surface, the lower connecting section of the reinforcing rib penetrates through and extends out of the bottom step, the middle connecting section of the reinforcing rib connects the upper connecting section with the lower connecting section, and the middle connecting section is fixedly connected with the cast-in-place concrete after the cast-in-place concrete is solidified;

The water stop plate is positioned among the upper connecting section, the lower connecting section and the middle connecting section; the top of the water stop plate is lower than the upper connecting section, the bottom of the water stop plate is higher than the lower connecting section, and the middle connecting section is far away from the water stop plate and is positioned above the bottom step so as to prevent the water stop plate from colliding with the reinforcing ribs.

In some embodiments, the top of the upper step is lower than the upper connection end to prevent the upper step from colliding with the reinforcing rib.

In some embodiments, after the two splicing surfaces of the two prefabricated components are spliced, the middle connecting section of one prefabricated component and the middle connecting section of the other prefabricated component are intersected above the splicing surface, and the center of the intersection area is located on the vertical connecting line of the splicing surface, so that the structural strength of the combined pressure-bearing platform is improved.

In a third aspect, embodiments of the present application provide a method for preventing leakage of a combined pressure-bearing platform according to any one of the second aspects, including:

setting a waterproof layer to prevent water; the waterproof layer is laid on the upper table surfaces of the two prefabricated parts and the cured cast-in-place concrete to block water leakage;

Setting upper-stage waterproof; the upper step is arranged at a height lower than that of an upper table surface of the prefabricated part, and a connecting surface is formed between the upper step and the upper table surface; the water leakage reaches the upper stage from the waterproof layer through a gap between the connecting surface and the cast-in-place concrete, and the upper stage is horizontally arranged or obliquely upwards arranged to block the water leakage and prolong the leakage path of the water leakage;

setting a bottom level waterproof; the bottom step is arranged to be lower than the upper step, and extends in a direction away from the upper step so as to prolong a leakage path of the leakage water;

setting a splicing surface to be waterproof; the splicing surface is arranged at a height lower than the bottom step and is curved so as to prolong the leakage path of the leakage water.

In some embodiments, the anti-leakage method further comprises: setting a water stop plate for water prevention; the water stop plate is integrally arranged to vertically extend and the top of the water stop plate is bent towards the direction of the connecting surface, so that the firmness of connection between the top of the water stop plate and the cast-in-place concrete is improved, and the shrinkage generated by solidification of the cast-in-place concrete is reduced, and the leakage path of leakage water is prolonged.

In some embodiments, the anti-leakage method further comprises: sealing and waterproofing are arranged; the waterproof strip is arranged between the concave section and the convex section of the prefabricated part after being spliced, and waterproof glue is arranged in the vertical sections above and below the concave section and the convex section.

The beneficial effects that this application some embodiments bring are:

the wet joint comprises an upper step, a bottom step and a connecting surface, so that the leakage path of the leakage water is prolonged as a whole, and the effect of preventing the leakage water is achieved.

In some embodiments of the application, the wet joint section after the improvement is divided into two steps along the vertical direction of the wet joint, the horizontal direction of the wet joint is through the mode that the bottom step is outwards chosen and is extended, the prefabricated parts on the left side and the right side are connected with the splicing surface through the bottom step left and right to realize sealing connection, thereby realizing the bottom die-free construction in the wet joint construction process, and accelerating the construction progress to a certain extent. Through the waterstop and the waterproof glue of the rubber material that splice face department set up, can prevent effectively that cast in situ concrete from pouring the thick liquid problem of leakage in-process, can improve the compactness of pouring post cast in situ concrete to a certain extent.

It should be understood that the description of this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows. The above, as well as additional objectives, advantages, and features of the present application will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present application when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings, which serve to better understand the present solution and are not to be construed as limiting the present application. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

fig. 1 is a schematic structural view of two mated preform components according to some embodiments of the present application.

Fig. 2 is a schematic structural view of two prefabricated components after being spliced according to some embodiments of the present application.

Fig. 3 is a schematic structural view of two prefabricated components spliced according to other embodiments of the present application.

Fig. 4 is a schematic structural view of two prefabricated components after being spliced according to still other embodiments of the present application.

Fig. 5 is a schematic structural view of two prefabricated components after being spliced according to still other embodiments of the present application.

Fig. 6 is a schematic structural diagram of a combined pressure-bearing platform and a schematic leakage path of leakage water according to some embodiments of the present application.

Fig. 7 is a schematic diagram illustrating a positional relationship between a spliced surface and a water stop after splicing according to some embodiments of the present application.

Fig. 8 is a schematic structural view of a water stop plate according to some embodiments of the present application.

Fig. 9 is a schematic perspective view of a prefabricated part according to some embodiments of the present application.

Fig. 10 is a schematic perspective view of two prefabricated components after being spliced according to some embodiments of the present application.

FIG. 11 is a top view of two prefabricated components after being spliced according to some embodiments of the present application.

Description of main reference numerals:

01-combined pressure-bearing platform.

10-prefabricated parts.

11-upper order.

12-bottom step.

13-splicing surface, 131-concave section, 132-convex section, 133-water stop.

14-connection face.

15-water-stopping plate, 151-water-stopping plate top, 152-water-stopping plate middle and 153-water-stopping plate bottom.

16-reinforcing ribs, 161-upper connecting sections, 162-middle connecting sections and 163-lower connecting sections.

17-upper table top.

20-cast-in-place concrete.

30-waterproof layer, 31-first waterproof layer, 32-second waterproof layer.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, in which many details of the embodiments of the present application are included to facilitate understanding, and the described embodiments are only possible technical implementations of the present application, and should be considered as merely exemplary, not all implementations possible. Also, for the sake of clarity and conciseness, descriptions of well-known functions and constructions are omitted in the following description.

The terms "first," "second," and the like in this application are used for distinguishing between similar objects and not for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the objects identified by the terms "first", "second", etc. are generally one type and do not limit the number of objects, for example, the first object may be one or more. In this application, "or/and", "and/or" means at least one of the objects, and "or" means one of the objects.

The terms "upper," "lower," "front," "rear," "vertical," "high," "low" and "low" are used herein with reference to fig. 6, primarily for purposes of better describing the present application and embodiments thereof, and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operate in a particular orientation. The term "plurality" shall mean two as well as more than two.

It will be understood that the terms "comprises" and "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Exemplary application scenarios

Before introducing the technical solution of the present application, an exemplary application scenario of the technical solution of the embodiment of the present application is first described.

The inventors have found that wet joint leakage water is mainly expressed in two ways, one is along the wet joint and the construction joint position of the prefabricated part 10, and the other is along the transverse direction of the wet joint. When the wet joint concrete is constructed, for example, the treatment of roughening and sprinkling water for wetting the joint concrete can be reinforced, micro-expansion concrete is adopted for the joint concrete, the vibration compaction is reinforced in the pouring process, the maintenance is reinforced after the pouring, the shrinkage crack of the concrete is reduced, and the waterproof layer 30 is arranged on the upper table surface 17 of the prefabricated part 10. However, with the load action during the service period and the shrinkage creep of the concrete, the wet joint is deformed to a certain extent, so that fine cracks are generated between the wet joint and the prefabricated member 10 joint and between the wet joint and the wet joint itself, and accordingly, the problems of water leakage, internal steel bar corrosion and the like occur in the wet joint due to the fact that water seepage occurs in the waterproof layer 30, so that the expansion of the cracks is further aggravated, serious leakage is likely to occur, and the structural safety of the wet joint is affected.

Exemplary technical solution

Based on the above considerations, according to a first aspect of the present application, there is provided a prefabricated element 10 comprising:

an upper step 11, a bottom step 12 and a splicing surface 13 with sequentially reduced heights, wherein the upper step 11 is lower than an upper table surface 17 of the prefabricated part 10;

wherein a connection surface 14 is formed between the upper step 11 and the upper table 17, one end of the upper step 11 is connected with the connection surface 14, the other end of the upper step 11 extends in a lateral direction away from the connection surface 14 and is connected with one end of the bottom step 12, the other end of the bottom step 12 extends in a lateral direction away from the upper step 11 and is connected with the splicing surface 13, and the whole splicing surface 13 extends downward; the upper step 11 and the bottom step 12 are used for bearing cast-in-place concrete 20, the connecting surface 14 is vertically or in a flaring shape so as to improve the concrete saturation after casting the cast-in-place concrete 20, and the splicing surface 13 is used for being connected with the splicing surface 13 of the other prefabricated component 10 in a matched pair.

Compared with a vertical wet seam, the wet seam comprises the upper step 11, the bottom step 12 and the connecting surface 14, so that the leakage path of the leakage water is prolonged as a whole, and the effect of preventing the leakage water is achieved. Specifically, the connecting surface 14 extends entirely in the vertical direction, the upper step 11 extends entirely in the lateral direction, and the lower step 12 extends entirely in the lateral direction, increasing the lateral distance of the wet joint and reducing the leakage of the leakage water. It should be noted that the number of the upper steps 11 may be one as shown in the figure, or more upper steps 11 may be set as required; the number of the bottom steps 12 can be one shown in the figure, and more bottom steps 12 can be arranged according to the requirement, and it is understood that the increase of the number of the upper steps 11 or the bottom steps 12 can further prolong the leakage path of the leakage water and further increase the transverse distance of the wet joint, so as to further reduce the leakage of the leakage water. For example, in some embodiments, two upper steps 11 and one lower step 12, or one upper step 11 and two lower steps 12 are included. The shape of the upper step 11 may be a plane shape or an arc shape, and the shape of the bottom step 12 may be a plane shape or an arc shape, and fig. 3-5 schematically illustrate a combination mode of one plane upper step 11 and one arc or plane bottom step 12, wherein the plane upper step 11 in fig. 3 and fig. 4 inclines upwards from left to right so as to further prolong the leakage path of the leakage water, increase the difficulty of the leakage water flowing through the upper step 11, and play a role in preventing leakage.

In this application, the connection face 14 is arranged vertically or in a flared shape, so as to improve the saturation of the concrete after pouring the cast-in-place concrete 20, in particular with the effect represented by: on one hand, pores are not easy to appear when the cast-in-place concrete 20 is poured, and on the other hand, vibration is facilitated after the cast-in-place concrete 20 is poured. In this application, one end of upper step 11 with connect the face 14, the other end of upper step 11 is kept away from the lateral direction of connecting the face 14 extends and with one end connection of bottom step 12, the other end of bottom step 12 is kept away from the lateral direction of upper step 11 extends and with splice face 13 is connected, and upper step 11 can not stretch into in connecting the face 14 and lead to upper step 11 and connecting the face 14 to form the space that is difficult for cast in place concrete 20 to pour into, and bottom step 12 can not stretch into in upper step 11 and lead to bottom step 12 and upper step 11 to form the space that is difficult for cast in place concrete 20 to pour into, has reduced or prevented the hole that appears when cast in place concrete 20 pours, has improved compactness and the waterproof nature that cast in place concrete 20 and prefabricated component 10 combine, has improved the concrete saturation after pouring cast in place concrete 20, here refers to cast in place concrete 20 and prefabricated component 10 combine promptly wet seam's concrete saturation. Moreover, through the arrangement, the projection area of the space above the upper step 11, the bottom step 12 and the splicing surface 13 is not smaller than the projection area of the upper step 11, the bottom step 12 and the splicing surface 13, so that the casting of the cast-in-place concrete 20 is facilitated, the operation space for vibrating the cast-in-place concrete 20 after casting is reduced, and the concrete saturation after the cast-in-place concrete 20 is improved.

It will be appreciated that the improvement in the water-repellent effect is small when the wet seam or splice seam is a vertical seam, so in some embodiments of the present application, the splice face 13 includes a concave section 131 that is concave into the prefabricated part 10, or a convex section 132 that is convex out of the prefabricated part 10 that mates with the concave section 131, to extend the leak path of the leaking water. For example, the shape of the splice face 13 may be a primary bend or a secondary bend as illustrated in fig. 8. In the illustrated embodiment of the present application, the splicing surface 13 includes a concave section 131 that is concave into the prefabricated element 10, and the concave section 131 is in an inner arc shape; or a convex section 132 of the prefabricated part 10 is convex and matched with the concave section 131, and the convex section 132 is in an outer arc shape. For example, in the embodiment shown in FIG. 1, the splicing face 13 of the left hand preform 10 includes an inner arcuate concave section 131 and the splicing face 13 of the right hand preform 10 includes an outer arcuate convex section 132. For the protruding section 132, the arc shape is effective to prevent damage to the protruding section 132 during transportation or installation. In addition, when the water stop 133 is disposed between the two spliced surfaces 13 after splicing, especially when the water stop 133 shown in fig. 1 and 7 is disposed between the concave section 131 and the convex section 132, the inner arc-shaped concave section 131 and the outer arc-shaped convex section 132 can apply a more uniform compressive force to the water stop 133, so that the uniformity of stress on each part of the water stop 133 is improved, and the sealing and waterproof effects of the water stop 133 are improved. The splice face 13 further includes vertical segments disposed above and below the concave segment 131 and the convex segment 132, which may be coated or impregnated with a waterproof adhesive to enhance the sealing waterproof effect of the splice face 13. In the present application, the vertical section and the concave section 131 of one prefabricated component 10 are spliced with the vertical section and the convex section 132 of another prefabricated component 10 to form a splice seam.

In the embodiment shown in fig. 1, 2 and 5, the bottom step 12 is rounded to increase the saturation of the concrete after casting the cast-in-place concrete 20. In the embodiment shown in fig. 3 and 4, the bottom step 12 is in a bent shape, and includes a bottom surface and a vertical surface, where the vertical surface is connected to the upper step 11. In these embodiments, the bottom step 12 is not necked down, thereby facilitating the reduction of voids that occur during casting of the cast-in-place concrete 20, as well as facilitating post-casting vibration of the cast-in-place concrete 20.

The application also comprises a water stop plate 15 with special design, and the whole water stop plate 15 extends vertically. Referring to fig. 1-6, 8 and 9-10, the water stop plate bottom 153 passes through the upper step 11 downwards and is fixedly connected with the upper step 11, the water stop plate top 151 passes through the upper step 11 upwards and is used for being fixedly connected with the cast-in-place concrete 20, namely, the water stop plate bottom 153 is buried in the prefabricated component 10 below the upper step 11, and the water stop plate top 151 extends out to the space above the upper step 11 before being spliced. The water stop plate 15 blocks the water leakage from directly flowing from the upper step 11 to the bottom step 12, the water leakage needs to bypass the water stop plate 15, the leakage path of the water leakage is prolonged, and the water stop plate 15 also plays a role in blocking the water leakage. In the drawing, the water stop plate bottom 153 is bent toward the connecting surface 14 to improve the connection firmness between the water stop plate bottom 153 and the upper step 11 and reduce shrinkage of the cast-in-place concrete 20 caused by solidification. It is understood that the bending of the water stop plate bottom 153 increases the area of the connection 14 of the water stop plate 15 with the prefabricated element 10 under the upper stage 11, thereby increasing the connection firmness. Shrinkage can be generated when the cast-in-place concrete 20 is solidified, and the water stop plate bottom 153 is bent towards the direction of the connecting surface 14, so that gaps generated by the upper step 11, the bottom step 12, the splicing surface 13 and the cast-in-place concrete 20 caused by the shrinkage can be reduced, and the waterproof effect is improved. In addition, cast-in-place concrete 20 with small shrinkage can be selected for material selection. In this application, the water stop plate 15 is folded at both ends, but functions differently. In the illustrated embodiment, the water stop plate top 151 is bent toward the connection surface 14 to improve the connection firmness of the water stop plate top 151 and the cast-in-place concrete 20, and to reduce shrinkage caused by solidification of the cast-in-place concrete 20 and to lengthen a leakage path of leakage water. Referring to fig. 6, the water stop plate top 151 is bent, the difficulty of water leakage bypassing the water stop plate top 151 is increased, and thus the waterproof effect is improved.

The application still includes with prefabricated component 10 fixed connection's strengthening rib 16, the strengthening rib 16 includes three sections, and wherein the upper junction 161 of strengthening rib 16 passes and stretches out the junction surface 14, the lower junction 163 of strengthening rib 16 passes and stretches out the bottom level 12, the well junction 162 of strengthening rib 16 will upper junction 161 with lower junction 163 connects well junction 162 with cast in situ concrete 20 solidifies after cast in situ concrete 20 solidifies and is fixedly connected. The reinforcing ribs 16 increase the structural strength of the combined pressure-bearing platform 01.

The application also provides a cooperation design of stagnant water board 15 and strengthening rib 16: the water stop plate 15 is positioned among the upper connecting section 161, the lower connecting section 163 and the middle connecting section 162; wherein, the water stop plate top 151 is lower than the upper connecting section 161, the water stop plate bottom 153 is higher than the lower connecting section 163, and the middle connecting section 162 is far away from the water stop plate 15 and is located above the bottom step 12, so as to prevent the water stop plate 15 from colliding with the reinforcing ribs 16. Referring to fig. 2 to 6 and 10 to 11, after the two prefabricated elements 10 are spliced, the middle connection sections 162 of the reinforcing ribs 16 on at least two prefabricated elements 10 are staggered with each other. Taking the left water stop plate 15 in fig. 2 as an example, if the water stop plate 15 is transversely arranged, the water stop plate 15 collides with the middle connecting section 162 of the right reinforcing rib 16 when the water stop plate 15 covers the splicing surface 13, so that the left water stop plate 15 needs to be shortened, and the shortened water stop plate 15 cannot cover the splicing surface 13, so that the water prevention of the splicing surface 13 cannot be favorably influenced. In this application, the water stop plate 15 of vertical setting is located go up the linkage segment 161 the linkage segment 163 down the between the linkage segment 162, not only played the water-proof effects, avoided the conflict of strengthening rib 16 on water stop plate 15 and another prefabricated component 10 moreover.

It should be noted that, without conflict, the embodiments of the first aspect and features of the embodiments may be combined with each other, and the present application schematically provides some combined embodiments to illustrate possible combinations:

a prefabricated part 10 comprises an upper step 11, a bottom step 12 and a splicing surface 13, wherein the heights of the upper step 11 and the lower step 12 are sequentially reduced, and the upper step 11 is lower than an upper table surface 17 of the prefabricated part 10.

The splicing surface 13 includes a concave section 131 that is concave into the prefabricated element 10, the concave section 131 is in an inner arc shape, or a convex section 132 that is matched with the concave section 131 and protrudes out of the prefabricated element 10, and the convex section 132 is in an outer arc shape. The bottom step 12 is rounded to increase the saturation of the concrete after casting the cast-in-place concrete 20.

The water stop plate 15 integrally extending vertically is also included, the bottom 153 of the water stop plate passes through the upper step 11 downwards and is fixedly connected with the upper step 11, and the top 151 of the water stop plate passes through the upper step 11 upwards and is fixedly connected with the cast-in-place concrete 20; the bottom 153 of the water stop plate is bent towards the direction of the connecting surface 14, so as to improve the connection firmness between the bottom 153 of the water stop plate and the upper step 11 and reduce the shrinkage generated by solidification of the cast-in-place concrete 20; the water stop plate top 151 is bent towards the direction of the connecting surface 14, so as to improve the connection firmness of the water stop plate top 151 and the cast-in-place concrete 20, reduce shrinkage generated by solidification of the cast-in-place concrete 20 and prolong the leakage path of water leakage.

The upper connecting section 161 of the reinforcing rib 16 penetrates through and extends out of the connecting surface 14, the lower connecting section 163 of the reinforcing rib 16 penetrates through and extends out of the bottom step 12, the middle connecting section 162 of the reinforcing rib 16 connects the upper connecting section 161 with the lower connecting section 163, and the middle connecting section 162 is fixedly connected with the cast-in-place concrete 20 after the cast-in-place concrete 20 is solidified; the water stop plate 15 is positioned among the upper connecting section 161, the lower connecting section 163 and the middle connecting section 162; wherein, the water stop plate top 151 is lower than the upper connecting section 161, the water stop plate bottom 153 is higher than the lower connecting section 163, and the middle connecting section 162 is far away from the water stop plate 15 and is located above the bottom step 12, so as to prevent the water stop plate 15 from colliding with the reinforcing ribs 16.

The water stop plate top 151 and the water stop plate bottom 153 are connected through a water stop plate middle 152, and the water stop plate middle 152 extends vertically.

According to a second aspect of the present application, there is provided a modular pressure-bearing platform 01 comprising a waterproof layer 30, cast-in-place concrete 20 and two prefabricated elements 10 in pairs; wherein each of the prefabricated elements 10 comprises:

an upper step 11, a bottom step 12 and a splicing surface 13 with sequentially reduced heights, wherein the upper step 11 is lower than an upper table surface 17 of the prefabricated part 10; a connecting surface 14 is formed between the upper step 11 and the upper table surface 17, one end of the upper step 11 is connected with the connecting surface 14, the other end of the upper step 11 extends in a transverse direction away from the connecting surface 14 and is connected with one end of the bottom step 12, the other end of the bottom step 12 extends in a transverse direction away from the upper step 11 and is connected with the splicing surface 13, and the whole splicing surface 13 extends downwards; the upper stage 11 is horizontally arranged or obliquely upwards arranged; the upper step 11 and the bottom step 12 are used for bearing the cast-in-place concrete 20, the connecting surface 14 is vertically or in a flaring shape so as to improve the concrete saturation after the cast-in-place concrete 20 is poured, the splicing surface 13 is used for being connected with the splicing surface 13 of the other matched prefabricated component 10, and the whole splicing surface 13 is in a curve shape;

After the two splicing surfaces 13 of the two prefabricated parts 10 are spliced, the two connecting surfaces 14, the two upper steps 11, the two lower steps 12 and the cast-in-place concrete 20 form wet joints; the waterproof layer 30 is laid on the two upper table boards 17 and the cured cast-in-place concrete 20.

In this application, compare in the design that upper step 11 and junction surface 14 are decurrent, upper step 11 level or slope upwards set up can improve the water-proof effects. Specifically, the water leakage reaches the upper step 11 from the waterproof layer 30 through the gap between the connection surface 14 and the cast-in-place concrete 20, and the upper step 11 disposed horizontally or obliquely upward plays a role in slowing down or blocking the passage of the water leakage.

The splicing surface 13 is curved as a whole, so that a leakage path of the leakage water is prolonged, and the effect of preventing the leakage water is achieved. Moreover, the curved splicing surface 13 increases the arrangement space on the splicing surface 13, and can be sealed with a sealing member such as a water stop 133 having a larger area. Specifically, the shape of the splicing surface 13 may be a primary bending shape or a secondary bending shape as illustrated in fig. 8. As another example, as shown in fig. 1, the joint surface 13 is curved as a whole, which is composed of an arc shape and a straight shape, wherein the straight shape is a vertical section arranged above and below the concave section 131 and the convex section 132.

The combined pressure-bearing platform 01 further comprises a water stop belt 133, and the water stop belt 133 is arranged between the two spliced surfaces 13 after splicing. When the water stop 133 shown in fig. 1 and 7 is disposed between the concave section 131 and the convex section 132, the inner arc-shaped concave section 131 and the outer arc-shaped convex section 132 can apply a more uniform compressive force to the water stop 133, so that the uniformity of stress on each part of the water stop 133 is improved, and the sealing and waterproof effects of the water stop 133 are improved. The splice face 13 further includes vertical sections disposed above and below the concave section 131 and the convex section 132, which may be coated or impregnated with a waterproof adhesive only to enhance the sealing waterproof effect of the splice face 13.

In the combined pressure-bearing platform 01, the splicing surface 13 of one prefabricated component 10 comprises a concave section 131 which is concave to the prefabricated component 10, the concave section 131 is in an inner arc shape, the splicing surface 13 of the other matched prefabricated component 10 comprises a convex section 132 which is matched with the concave section 131 and protrudes from the prefabricated component 10, and the convex section 132 is in an outer arc shape so as to prolong the leakage path of the leakage water.

After the two splicing surfaces 13 of the two prefabricated parts 10 are spliced, the two bottom steps 12 form a semicircle or a minor arc, so that the semicircle or the minor arc is not in a necking shape, on one hand, the cast-in-place concrete 20 is not easy to generate pores during pouring, on the other hand, the cast-in-place concrete 20 is convenient to vibrate after pouring, and the saturation of the concrete after pouring the cast-in-place concrete 20 is improved.

In the combined pressure-bearing platform 01, each prefabricated part 10 further comprises a water stop plate 15, and the whole water stop plate 15 extends vertically; wherein, the bottom 153 of the water stop plate passes through the upper step 11 downwards and is fixedly connected with the upper step 11, and the top 151 of the water stop plate passes through the upper step 11 upwards and is fixedly connected with the cast-in-place concrete 20; wherein, the bottom 153 of the water stop plate is bent towards the direction of the connecting surface 14, so as to improve the connection firmness between the bottom 153 of the water stop plate and the upper step 11 and reduce the shrinkage generated by solidification of the cast-in-place concrete 20; wherein, the water stop plate top 151 is bent towards the direction of the connecting surface 14, so as to improve the connection firmness of the water stop plate top 151 and the cast-in-place concrete 20, reduce the shrinkage generated by solidification of the cast-in-place concrete 20 and prolong the leakage path of the leakage water; the water stop plate top 151 and the water stop plate bottom 153 are connected through a water stop plate middle 152, the water stop plate middle 152 extends vertically, an included angle between the water stop plate top 151 and the water stop plate middle 152 is alpha, and an included angle between the water stop plate bottom 153 and the water stop plate middle 152 is beta, wherein alpha is more than or equal to 135 degrees and less than or equal to 150 degrees, and beta is more than or equal to 135 degrees and less than or equal to 150 degrees. In some embodiments, the angles α, β are the same, so that it is not necessary to distinguish between the water stop plate top 151 and the water stop plate bottom 153 when the prefabricated member 10 is produced, which facilitates rapid installation of the water stop plate 15. As described above, the water stop plate top 151 is bent toward the connection surface 14, which improves the connection firmness between the water stop plate top 151 and the cast-in-place concrete 20 and reduces shrinkage generated by solidification of the cast-in-place concrete 20 and prolongs the leakage path of the leakage water, but the bent part may have pores during casting of the cast-in-place concrete 20. The selection of the alpha angle in the application, namely when alpha is more than or equal to 135 degrees and less than or equal to 150 degrees, reduces the size or the number of the pores when the cast-in-place concrete 20 is poured.

In the combined pressure-bearing platform 01, each prefabricated part 10 further comprises a reinforcing rib 16, an upper connecting section 161 of the reinforcing rib 16 penetrates through and extends out of the connecting surface 14, a lower connecting section 163 of the reinforcing rib 16 penetrates through and extends out of the bottom step 12, a middle connecting section 162 of the reinforcing rib 16 connects the upper connecting section 161 and the lower connecting section 163, and the middle connecting section 162 is fixedly connected with the cast-in-place concrete 20 after the cast-in-place concrete 20 is solidified; the water stop plate 15 is positioned among the upper connecting section 161, the lower connecting section 163 and the middle connecting section 162; wherein, the water stop plate top 151 is lower than the upper connecting section 161, the water stop plate bottom 153 is higher than the lower connecting section 163, and the middle connecting section 162 is far away from the water stop plate 15 and is located above the bottom step 12, so as to prevent the water stop plate 15 from colliding with the reinforcing ribs 16.

In this application, the top of the upper step 11 is lower than the upper connection end, so as to prevent the upper step 11 from colliding with the reinforcing rib 16. In particular, in the embodiment shown in fig. 4 and 5, the upper step 11 is disposed obliquely upward, and the upper step 11 has a top lower than the upper connection end, so that damage to the upper step 11 caused by the upper connection end during transportation or installation can be prevented.

In this application, two of prefabricated component 10 splice the back, one prefabricated component 10 well linkage segment 162 with another prefabricated component 10 well linkage segment 162 intersects in the top of splice 13, and the center of intersection region is located splice 13 is on the vertical line of splice seam promptly, and the cast in situ concrete 20 volume in the intersection region of splice seam both sides is the same basically like this, has avoided one side cast in situ concrete 20 volume less the problem that leads to structural strength is low, has improved through this kind of setting the structural strength of combination formula pressure-bearing platform 01.

In some embodiments, for example, the prefabricated component 10 is a steel component or a concrete component, for example, the modular pressure-bearing platform 01 is a composite girder or a composite deck.

According to a third aspect of the present application, there is provided a method for preventing leakage of the combined type pressure-bearing platform 01 according to the second aspect, including:

providing a waterproof layer 30 for waterproofing; wherein the waterproof layer 30 is arranged to be laid on the upper table-boards 17 of the two prefabricated components 10 and the cured cast-in-place concrete 20 to block water leakage.

Setting an upper stage 11 to prevent water; wherein the height of the upper step 11 is lower than the upper table surface 17 of the prefabricated part 10, and a connecting surface 14 is formed between the upper step 11 and the upper table surface 17; the water leakage reaches the upper stage 11 from the waterproof layer 30 through the gap between the connection surface 14 and the cast-in-place concrete 20, and the upper stage 11 is horizontally or obliquely arranged upward to block the water leakage and extend the leakage path of the water leakage.

Setting a bottom step 12 to be waterproof; wherein the bottom step 12 is arranged at a lower level than the upper step 11, and the bottom step 12 extends away from the upper step 11 to extend the leakage path of the leakage water.

The splicing surface 13 is arranged to be waterproof; wherein the splicing surface 13 is provided to have a height lower than the bottom step 12 and is curved to extend a leakage path of the leakage water.

In some embodiments, the anti-leakage method further comprises providing a water stop plate 15 to prevent water; wherein, set up the stagnant water board 15 whole in vertical extension and stagnant water board top 151 is buckled to junction surface 14 direction, in order to improve stagnant water board top 151 with cast in situ concrete 20 is connected firmly and reduce cast in situ concrete 20 solidification produces shrink and the leakage path of extension leakage water.

In some embodiments, the anti-leakage method further comprises providing a seal to prevent water; wherein, the water stop 133 is arranged between the concave section 131 and the convex section 132 of the two spliced prefabricated parts 10, and waterproof glue is arranged in the vertical sections above and below the concave section 131 and the convex section 132.

Fig. 6 shows a leakage path schematic diagram of leakage water, and in the embodiment shown in fig. 6, the application plays a role in treating the leakage water by arranging a waterproof layer 30, arranging an upper step 11, arranging a water stop plate 15, arranging a bottom step 12, arranging a splicing surface 13 and arranging sealing waterproof at the splicing surface 13.

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments in the present application may be combined with each other, and the present application schematically provides some combined embodiments to illustrate possible combinations:

the traditional prefabricated component 10 has a rectangular cross section, the joint of new and old concrete (the prefabricated component is old concrete and the cast-in-place concrete 20 is new concrete) is a vertical joint, the construction of a wet joint is mostly carried out by adopting a hanging die, the template is most in wood form, the concrete leakage phenomenon easily occurs in the construction process, and therefore the compactness (plumpness) of the wet joint concrete can be influenced, and further later leakage is caused.

Taking fig. 2 as an example, the section of the improved wet joint is divided into two steps along the vertical direction of the wet joint, the transverse direction of the wet joint is outwards extended through the bottom steps 12, and the prefabricated parts 10 on the left side and the right side are connected with the splicing surface 13 through the left and the right of the bottom steps 12 to realize sealing connection, so that the bottom-die-free construction in the wet joint construction process is realized, and the construction progress can be accelerated to a certain extent. And through the water stop 133 and the waterproof glue of the rubber material that splice face 13 department set up, can prevent effectively that cast in situ concrete 20 from pouring the in-process from leaking the thick liquid problem, can improve the compactness of cast in situ concrete 20 after pouring to a certain extent. The design of the arc-shaped sections of the bottom steps 12 of the left and right prefabricated parts 10 increases the bonding area of the new concrete and the old concrete, is beneficial to the bonding between the new concrete and the old concrete, and improves the structural strength of the combined pressure-bearing platform 01. In addition, due to the design of the splicing seams of the arc-shaped sections, the joint length of new and old concrete is increased, the water seepage path of the splicing seams is prolonged, and the probability of seeping out of the splicing seams can be reduced.

The cast-in-place concrete 20 is made of UHPC Ultra-high performance concrete (UHPC for short, english Ultra-High Performance Concrete) and has stronger compactness and impermeability. The UHPC ultra-high performance concrete can be suitably reduced in the anchoring length of the reinforcing bars 16 (the portion connected to the cast-in-place concrete 20) due to the higher strength, and can be adapted to the prefabricated elements 10 of smaller width.

The arc design of the bottom step 12 of this application, the width that bottom step 12 contacted with cast in situ concrete 20 is less than the width of two upper steps 11 and two junction surfaces 14 of top, and the anchoring length of strengthening rib 16 that is in bottom step 12 also can be corresponding reduction, and the application uses UHPC ultra-high performance concrete to have realized less strengthening rib 16 anchoring length.

The welding connection of the annular reinforcing ribs 16 on the left side and the right side of the traditional wet joint is adjusted to be in a staggered non-welding connection mode, the consumption of the reinforcing ribs 16 is reduced, vibration is more convenient and effective in the concrete construction process, the compactness of concrete is improved, and the leakage resistance is enhanced.

Traditional prefabricated component 10 section is the rectangle, and new and old concrete joint is vertical seam, and when the seam crossing set up stagnant water board 15, the steel sheet is the intermediate position that the level was arranged and is in vertical direction, and pre-buried stagnant water board 15 can lead to its and the problem of leaking thick liquid appears in vertical template juncture. The water stop plate 15 and part of the reinforcing ribs 16 which are horizontally arranged have the problem of conflict, and the water stop plate 15 is not suitable for fixing. The water stop plate 15 is changed into the vertical setting from the horizontal setting, so that the problem of slurry leakage at the joint of the water stop plate 15 and the template of the prefabricated part 10 can be effectively avoided, the conflict with the reinforcing ribs 16 is reduced, the water stop plate 15 is conveniently fixed, and the operation is convenient in the construction process. The water stop plate 15 is arranged in a folded line shape, and the two ends of the water stop plate 15 are properly folded towards the upstream surface, so that a similar wrapping effect is formed, and water leakage at the splice joint can be effectively isolated. The water stop plate 15 adopted by the technology can be adjusted in setting position, setting mode and setting mode, and the defect of the traditional setting mode can be effectively overcome.

Referring to fig. 6, the waterproof layer 30 of the present application includes a first waterproof layer 31 and a second waterproof layer 32, where the second waterproof layer 32 may cover the distance between the two connection surfaces 14 as a waterproof reinforcing layer, and the second waterproof layer 32 may be a polyurethane waterproof reinforcing layer, so as to further enhance the water seepage preventing performance.

The leakage path of the cast-in-place concrete 20 from top to bottom is as follows:

leakage water-first waterproof layer 31 (1 st leakage line), second waterproof layer 32 (2 nd leakage line), UHPC ultra-high performance concrete (3 rd leakage line), waterproof glue at splice joint and water stop 133 (4 th leakage line).

The leakage path of the leakage through the new and old concrete interface is as follows:

leakage water-first waterproof layer 31 (1 st leakage line), second waterproof layer 32 (2 nd leakage line), upper stage 11 (3 rd leakage line), water stop plate 15 (4 th leakage line), bottom stage 12 (5 th leakage line), water stop tape 133 (6 th leakage line) at the splice joint.

The present embodiment has the following effects:

the application combines the setting mode of the bottomless die wet joint and the water stop plate 15, adjusts the cast-in-place concrete 20 into UHPC ultra-high performance concrete with good compactness and impermeability, adds a waterproof reinforcing layer on the surface of the prefabricated part 10, has an effect of effectively treating wet joint leakage, and solves the problem of traditional wet joint leakage. The anti-seepage capability of the wet joint is improved, and the problem that the structural safety is affected due to corrosion of the steel reinforcing ribs 16 caused by water leakage of the wet joint is avoided.

It should be noted that the shapes and dimensions of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present application. In addition, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Unless otherwise known, numerical parameters in this specification and the appended claims are approximations that may vary depending upon the desired properties sought to be obtained by the context of the present application. In particular, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". In general, the meaning of expression is meant to include a variation of + -10% in some embodiments, a variation of + -5% in some embodiments, a variation of + -1% in some embodiments, and a variation of + -0.5% in some embodiments by a particular amount.

Thus, embodiments of the present application have been described in detail with reference to the accompanying drawings. It should be noted that, in the drawings or the text of the specification, implementations not shown or described are all forms known to those of ordinary skill in the art, and not described in detail.

The above description is only a partial example of the present application and the description of the technical principles applied, and is not intended to limit the present application in any way. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the disclosure. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other to form a technical solution, which is also within the scope of protection of the present application.

Claims

1. Prefabricated component (10) of a modular pressure-bearing platform, characterized in that it comprises:

an upper step (11), a bottom step (12) and a splicing surface (13) with the heights being sequentially reduced, wherein the upper step (11) is lower than an upper table surface (17) of the prefabricated component (10);

a connecting surface (14) is formed between the upper step (11) and the upper table top (17), one end part of the upper step (11) is connected with the connecting surface (14), the other end part of the upper step (11) extends in a transverse direction far away from the connecting surface (14) and is connected with one end part of the bottom step (12), the other end part of the bottom step (12) extends in a transverse direction far away from the upper step (11) and is connected with the splicing surface (13), and the whole splicing surface (13) extends downwards; the upper step (11) and the bottom step (12) are used for bearing cast-in-place concrete (20), the connecting surface (14) is vertically or in a flaring shape so as to improve the concrete saturation after casting the cast-in-place concrete (20), and the splicing surface (13) is used for being connected with the splicing surface (13) of the other prefabricated component (10) in a matched mode.

2. The prefabricated element (10) according to claim 1, characterized in that,

the splicing face (13) comprises a concave section (131) which is concave into the prefabricated part (10) or a convex section (132) which is matched with the concave section (131) and protrudes out of the prefabricated part (10) so as to prolong the leakage path of the leakage water.

3. The prefabricated element (10) according to claim 2, characterized in that,

the splicing surface (13) comprises a concave section (131) which is concave into the prefabricated part (10), and the concave section (131) is of an inner arc shape; or a convex section (132) of the prefabricated member (10) is convex and matched with the concave section (131), and the convex section (132) is in an outer arc shape.

4. The prefabricated element (10) according to claim 1, characterized in that,

the bottom steps (12) are arc-shaped to improve the saturation of the concrete after casting the cast-in-place concrete (20).

5. The prefabricated element (10) according to claim 1, further comprising:

a water stop plate (15) extending vertically as a whole; the water stop plate bottom (153) downwards passes through the upper step (11) and is fixedly connected with the upper step (11), and the water stop plate top (151) upwards passes through the upper step (11) and is used for being fixedly connected with the cast-in-place concrete (20).

6. The prefabricated element (10) according to claim 5, characterized in that,

the water stop plate bottom (153) is bent towards the direction of the connecting surface (14), so that the firmness of connection between the water stop plate bottom (153) and the upper step (11) is improved, and shrinkage generated by solidification of the cast-in-place concrete (20) is reduced.

7. The prefabricated element (10) according to claim 6, characterized in that,

the water stop plate top (151) is bent towards the direction of the connecting surface (14), so that the firmness of connection between the water stop plate top (151) and the cast-in-place concrete (20) is improved, and the shrinkage generated by solidification of the cast-in-place concrete (20) is reduced, and the leakage path of leakage water is prolonged.

8. The prefabricated element (10) according to claim 7, further comprising:

the reinforcing rib (16), the last linkage segment (161) of reinforcing rib (16) pass and stretch out junction surface (14), the lower linkage segment (163) of reinforcing rib (16) pass and stretch out bottom (12), the well linkage segment (162) of reinforcing rib (16) will go up linkage segment (161) with lower linkage segment (163) are connected, after cast in situ concrete (20) solidifies well linkage segment (162) with cast in situ concrete (20) solidifies and is fixedly connected.

9. The prefabricated element (10) according to claim 8, characterized in that,

The water stop plate (15) is positioned among the upper connecting section (161), the lower connecting section (163) and the middle connecting section (162); wherein, stagnant water board top (151) is less than go up linkage segment (161), stagnant water board bottom (153) are higher than lower linkage segment (163), well linkage segment (162) are kept away from stagnant water board (15) and are located bottom step (12) top to prevent the conflict of stagnant water board (15) with strengthening rib (16).

10. The prefabricated element (10) according to claim 1, characterized in that,

the splicing surface (13) comprises a concave section (131) which is concave into the prefabricated component (10), the concave section (131) is of an inner arc shape, or a convex section (132) which is matched with the concave section (131) and protrudes out of the prefabricated component (10), and the convex section (132) is of an outer arc shape;

the bottom steps (12) are arc-shaped to improve the concrete saturation after pouring the cast-in-place concrete (20);

the water stop plate (15) integrally extending in the vertical direction is further included, the bottom (153) of the water stop plate downwards penetrates through the upper step (11) and is fixedly connected with the upper step (11), and the top (151) of the water stop plate upwards penetrates through the upper step (11) and is fixedly connected with the cast-in-place concrete (20); the bottom (153) of the water stop plate is bent towards the direction of the connecting surface (14) so as to improve the connection firmness of the bottom (153) of the water stop plate and the upper step (11) and reduce shrinkage generated by solidification of the cast-in-place concrete (20); the water stop plate top (151) is bent towards the direction of the connecting surface (14) so as to improve the firmness of the connection between the water stop plate top (151) and the cast-in-place concrete (20), reduce shrinkage generated by solidification of the cast-in-place concrete (20) and prolong a leakage path of leakage water;

The concrete casting machine further comprises a reinforcing rib (16), wherein an upper connecting section (161) of the reinforcing rib (16) penetrates through and extends out of the connecting surface (14), a lower connecting section (163) of the reinforcing rib (16) penetrates through and extends out of the bottom step (12), a middle connecting section (162) of the reinforcing rib (16) connects the upper connecting section (161) with the lower connecting section (163), and the middle connecting section (162) is fixedly connected with the cast-in-place concrete (20) after the cast-in-place concrete (20) is solidified; the water stop plate (15) is positioned among the upper connecting section (161), the lower connecting section (163) and the middle connecting section (162); wherein the water stop plate top (151) is lower than the upper connecting section (161), the water stop plate bottom (153) is higher than the lower connecting section (163), and the middle connecting section (162) is far away from the water stop plate (15) and is positioned above the bottom step (12) so as to prevent the water stop plate (15) from colliding with the reinforcing ribs (16);

the water stop plate top (151) is connected with the water stop plate bottom (153) through a water stop plate middle part (152), and the water stop plate middle part (152) extends vertically.