Construction method of structure above temporary runner of siphon well

Abstract

The invention relates to the field of siphon well construction, in particular to a construction method of a structure above a temporary runner of a siphon well, which comprises the following steps: S1, a first side wall and a second side wall of the temporary runner are configured, the first side wall is higher than the second side wall, and a gap is formed between the top of the second side wall and the bottom of an accessory structure of the siphon well to be constructed; s2, a temporary platform is arranged between the first side wall and the second side wall, the temporary platform comprises a plurality of cross beam components, each cross beam component comprises a hook part and a cross rod, the hook part is connected to one end of the cross rod, the hook part is reversely buckled to the top of the first side wall, and the other end of the cross rod is in lap joint to the top of the second side wall; and S3, a formwork for pouring the accessory structure is arranged on the temporary platform. By arranging the high-low wall and the reverse buckling type temporary platform, the temporary flow channel and the construction platform can be prevented from invading the accessory structure position of the siphon well, the reverse buckling type temporary platform arranged at the top of the temporary flow channel serves as a construction operation platform, a dry operation environment is provided for the accessory structure, and the influence of flowing water of the temporary flow channel is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of siphon well construction, in particular to a construction method of a structure above a temporary flow channel of a siphon well. BACKGROUND

[0002] In the construction process of a siphon well of a nuclear power plant, in order to ensure the unobstructed drainage of the surrounding foundation pit and the operation area, a temporary flow channel is usually arranged beside the siphon well for diversion and drainage. However, when the subsequent construction of the auxiliary structure (such as a valve well, an operation platform, a connecting corridor, etc.) of the siphon well is carried out, it is often found that the top plane of the side wall of the temporary flow channel intrudes into the projection range of the auxiliary structure, causing a space conflict, which results in that the auxiliary structure cannot be constructed according to the design drawing. At the same time, since the temporary flow channel needs to be continuously passed through water during use to play a drainage function, the inside is kept with water level for a long time, forming a wet operation environment, which causes the surrounding area to be unable to dry, and it is difficult to provide the necessary dry construction conditions for the construction of the foundation and the side wall of the auxiliary structure. This not only affects the quality of the formwork setting and the concrete pouring, but also increases the construction difficulty and safety risk, and seriously restricts the construction progress. SUMMARY

[0003] The present application aims at the problems that the top of the side wall of the temporary flow channel intrudes into the auxiliary structure, and the water kept in the temporary flow channel makes it difficult to provide a dry construction area for the construction of the auxiliary structure, both of which result in that the auxiliary structure cannot be constructed.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A construction method of a structure above a temporary flow channel of a siphon well, comprising the following steps: S1, configuring a first side wall and a second side wall of the temporary flow channel, the first side wall being higher than the second side wall, and the top of the second side wall having a gap with the bottom of an auxiliary structure of the siphon well to be constructed; S2, setting a temporary platform between the first side wall and the second side wall, the temporary platform comprising a plurality of beam members, the beam members comprising a hook portion and a cross bar, the hook portion being connected to one end of the cross bar, the hook portion being reversely buckled on the top of the first side wall, and the other end of the cross bar being overlapped on the top of the second side wall; S3, setting a formwork for pouring the auxiliary structure on the temporary platform.

[0005] The construction method of the structure above the temporary flow channel of the siphon well can avoid the intrusion of the temporary flow channel and the construction platform into the position of the auxiliary structure of the siphon well by setting the high-low wall and the reversely buckled temporary platform, and can provide a dry operation environment for the auxiliary structure by the reversely buckled temporary platform set on the top of the temporary flow channel as a construction operation platform, avoiding the influence of the water flow of the temporary flow channel. The method is simple in steps, convenient in operation, and good in effect.

[0006] As a preferred technical scheme of the present application, in step S1, if the first side wall and the second side wall have the same elevation initially, the top of the second side wall is broken to leave the gap.

[0007] As a preferred technical scheme of the present application, in step S2, the beam members are arranged at intervals along the length direction of the temporary flow channel, and all the beam members are connected as a whole by longitudinal connecting members.

[0008] As a further preferred technical scheme of the present application, the beam members are steel structures, the longitudinal connecting members are steel bars, a plurality of steel bars are arranged at intervals along the width direction of the temporary flow channel, and the steel bars are welded to connect the beam members.

[0009] As a further preferred technical scheme of the present application, the spacing between adjacent beam members is 0.3m-0.6m.

[0010] As a preferred technical scheme of the present application, the hook portion and the cross bar are both made of profile steel, and the hook portion and the cross bar are welded.

[0011] As a preferred technical scheme of the present application, the hook portion comprises a first rod member, a second rod member and a third rod member connected in sequence, the third rod member is connected to the cross bar, the first rod member is attached to the outer side of the first side wall, the second rod member is attached to the top of the first side wall, the third rod member is attached to the inner side of the first side wall, and the cross bar is arranged horizontally.

[0012] As a preferred technical scheme of the present application, step S3 comprises: S31, using the temporary platform to cast the bottom plate of the auxiliary structure and curing the formation; S32, using the temporary platform and the bottom plate to cast and form the vertical wall of the auxiliary structure.

[0013] As a further preferred technical scheme of the present application, the bottom plate and the vertical wall have a construction joint, and a water stop member is embedded in the construction joint.

[0014] As a further preferred technical scheme of the present application, a plurality of longitudinal beams are arranged on all the beam members, a plurality of square timbers are arranged on all the longitudinal beams, and plywood is arranged on the square timbers, which is used as a bottom mold of the bottom plate and a platform panel.

[0015] As described above, due to the adoption of the above technical scheme, the present application has the following beneficial effects: The construction method of the siphon well temporary flow channel upper structure can avoid the temporary flow channel and the construction platform from invading the auxiliary structure position of the siphon well, and the reverse buckle type temporary platform provided on the top of the temporary flow channel is used as a construction operation platform to provide a dry operation environment for the auxiliary structure and avoid the influence of the temporary flow channel, so that the method is simple in steps, convenient in operation and good in effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural section view of the siphon well auxiliary structure and the temporary flow channel; Figure 2 is a structural plane view of the siphon well auxiliary structure and the temporary flow channel; Figure 3 is an enlarged view of part A in the figure; Figure 2 Figure 4 is an enlarged view of part B in the figure; Figure 3 Figure 5 is a structural view of the cross beam member; Figure 6 is an exploded view of the cross beam member.

[0017] Markings in the figure: 1 - temporary flow channel, 11 - first side wall, 12 - second side wall; 2 - siphon well, 21 - auxiliary structure, 211 - bottom plate, 212 - vertical wall, 213 - construction joint, 214 - water stop element; 3 - temporary platform, 31 - cross beam member, 311 - hook part, 3111 - first rod element, 3112 - second rod element, 3113 - third rod element, 312 - cross rod, 32 - longitudinal connecting member; 4 - gap. DETAILED DESCRIPTION

[0018] The application will be further described in detail below in combination with test examples and specific embodiments. However, it should not be understood that the above-mentioned subject matter of the application is limited to the following examples only, and any technology realized based on the content of the application belongs to the scope of the application.

[0019] ​​In the description of specific embodiments of the present application, the terms of orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer" and the like are expressed based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product / device / apparatus of the present application is usually used, unless otherwise specified. These terms of orientation or positional relationship are only for the convenience of describing the present application or simplifying the description in specific embodiments to facilitate the quick understanding of the scheme by the skilled person, and do not indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship, and therefore cannot be understood as a limitation on the present application.

[0020] In addition, the terms "horizontal", "vertical", "suspended", "parallel" and the like do not mean that the corresponding device / component / element must be absolutely horizontal or vertical or suspended or parallel, but can be slightly inclined or deviated. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "suspended", "parallel" and the like, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8% or less, more preferably an error / deviation of ±6% or less, more preferably an error / deviation of ±5% or less, and more preferably an error / deviation of ±4% or less. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present application.

[0021] In addition, the terms "first", "second", "third" and the like in the description of the present application are only used to distinguish the same or similar components for description, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0022] In addition, in the description of the embodiments of the present application, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9, etc. in any case, and even more than 9.

[0023] In addition, in the description of the technical scheme of the present application, unless otherwise specified / limited / limited, the terms "arrangement", "installation", "connection", "connection", "provided with", "laid", "arrangement" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, such as welding, riveting, bolting, screwing and other commonly used connection means in the art. The connection can be mechanical connection, electrical connection or communication connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the communication between two elements.

[0024] In the related art, in the construction process of the siphon well of a nuclear power plant, in order to ensure that the surrounding foundation pit and the operation area are unobstructed, a temporary flow channel is usually arranged beside the siphon well for diversion and drainage. However, when the subsequent construction of the auxiliary structure (such as a valve well, an operation platform, a connecting corridor, etc.) of the siphon well is carried out, it is often found that the top plane of the side wall of the temporary flow channel invades the projection range of the auxiliary structure, causing a space conflict, resulting in that the auxiliary structure cannot be constructed according to the design drawing. At the same time, since the temporary flow channel needs to be continuously watered during use to play a drainage function, the inside is kept with water level for a long time, forming a wet operation environment, so that the surrounding area cannot be dried, and it is difficult to provide the necessary dry construction conditions for the foundation and side wall construction of the auxiliary structure. This not only affects the formwork setting and the quality of concrete pouring, but also increases the construction difficulty and safety risk, and seriously restricts the construction progress. Therefore, the technical scheme of the present application is generated, which is described below in combination with Figures 1 to 6 .

[0025] Embodiment 1 As shown in Figures 1 to 6 , the construction method of the temporary flow channel upper structure of the siphon well of the present application comprises the following steps: S1, as shown in Figure 1 , the first side wall 11 and the second side wall 12 of the temporary flow channel 1 are configured, the first side wall 11 is higher than the second side wall 12, and the top of the second side wall 12 and the bottom of the auxiliary structure 21 of the siphon well 2 to be constructed have a gap 4.

[0026] Among them, the temporary flow channel 1 should be set to avoid the auxiliary structure 21 of the siphon well 2, but in some actual situations of the project, the temporary flow channel 1 has no other setting position and can only be set in the position of the auxiliary structure 21 invades in advance. In this case, the temporary flow channel 1 can be set as the high-low wall structure described above to leave a position for the auxiliary structure 21 to be constructed later, that is, to leave the gap 4.

[0027] Or in some actual situations of the project, there is no auxiliary structure 21 of the siphon well 2 in advance, and the auxiliary structure 21 is added for later design change, and the position of the auxiliary structure 21 invades the position of the temporary flow channel 1 set originally, and the two side walls of the temporary flow channel 1 are set at the same height. In this case, the first side wall 11 and the second side wall 12 initially have the same elevation, and then the top of the second side wall 12 is broken to leave the gap 4.

[0028] S2, as shown in Figures 2 to 5As shown, a temporary platform 3 is provided between the first side wall 11 and the second side wall 12. The temporary platform 3 includes a plurality of crossbeam components 31. Each crossbeam component 31 includes a hook 311 and a crossbar 312. The hook 311 is connected to one end of the crossbar 312. The hook 311 is hooked back onto the top of the first side wall 11. The other end of the crossbar 312 is attached to the top of the second side wall 12.

[0029] like Figure 2 and Figure 3 As shown, the crossbeam members 31 are spaced apart along the length of the temporary flow channel 1. The spacing between adjacent crossbeam members 31 can be 0.3m to 0.6m, but 0.5m is generally chosen. All crossbeam members 31 are connected as a whole by longitudinal connecting members 32. For example, the crossbeam members 31 are steel structures, and the longitudinal connecting members 32 are steel bars. Several steel bars are spaced apart along the width of the temporary flow channel 1, and the steel bars are welded to the crossbeam members 31. In this embodiment, for example... Figure 3 An example is given using three φ10 steel bars, one of which is placed at each of the three positions (left, center, and right) of the temporary flow channel 1 to connect the beam member 31 into a whole.

[0030] like Figures 4 to 6 As shown, both the hook 311 and the crossbar 312 are made of steel profiles; in this embodiment, H10 steel profiles are used. The hook 311 and the crossbar 312 are welded together. The hook 311 includes a first member 3111, a second member 3112, and a third member 3113 connected in sequence. The third member 3113 is connected to the crossbar 312. The first member 3111 is attached to the outer side of the first side wall 11, the second member 3112 is attached to the top of the first side wall 11, and the third member 3113 is attached to the inner side of the first side wall 11. The crossbar 312 is horizontally positioned.

[0031] In some alternative embodiments, not shown, the temporary platform 3 further comprises longitudinal beams, square timbers and plywood; a plurality of longitudinal beams are arranged on all the cross beam members 31, the length direction of the longitudinal beams is perpendicular to the length direction of the cross beam members 31, the longitudinal beams are arranged at intervals, the interval can be 0.3m-0.6m, and 0.6m is generally selected, the longitudinal beams can be made of section steel or steel pipes, and in this embodiment, double-spliced steel pipes with a diameter of 48 and a length of 600 are used; a plurality of square timbers are arranged on the longitudinal beams, the length direction of the square timbers is perpendicular to the length direction of the longitudinal beams, the square timbers are arranged at intervals, the interval can be 0.3m-0.6m, and 0.3m is generally selected, and the square timbers have a size of 100mm*100mm; the square timbers are provided with plywood, the plywood is used as a bottom mold of the bottom plate 211 and a platform panel, and the thickness of the plywood is 10mm-20mm, and 15mm is generally selected.

[0032] S3, a formwork for pouring the auxiliary structure 21 is arranged on the temporary platform 3, and the following method can be used: S31, the bottom plate 211 of the auxiliary structure 21 is poured and cured by using the temporary platform 3, and the pouring of the bottom plate 211 includes pouring a low wall; S32, the vertical wall 212 of the auxiliary structure 21 is poured and cured by using the temporary platform 3 and the bottom plate 211, the bottom plate 211 and the vertical wall 212 have a construction joint 213 therebetween, a water stop 214 is embedded in the construction joint 213, and the water stop 214 can be made of a water stop steel plate.

[0033] S4, after the auxiliary structure 21 is formed, the plywood, the square timbers and the longitudinal beams are removed, the longitudinal beam members 32, i.e., the steel bars, are cut, then the cross bars 312 are cut, the cross bars 312 are taken out from the gap 4, and the hook portions 311 and the broken cross bars 312 are removed from the top of the first side wall 11.

[0034] The construction method of the temporary flow channel upper structure of the siphon well in this embodiment can avoid the temporary flow channel 1 and the construction platform from invading the position of the auxiliary structure 21 of the siphon well 2 by arranging the high-low wall and the reverse buckle type temporary platform 3, and can provide a dry working environment for the auxiliary structure 21 by using the reverse buckle type temporary platform 3 arranged on the top of the temporary flow channel 1 as a construction working platform to avoid the influence of water flow of the temporary flow channel 1; considering that the reverse buckle type temporary platform 3 has limited bearing capacity and cannot pour the auxiliary structure 21 at one time, the bottom plate 211 is first poured and formed by using the reverse buckle type temporary platform 3, and then the vertical wall 212 is poured together with the reverse buckle type temporary platform 3 and the bottom plate 211 to overcome the problem of insufficient bearing capacity of the reverse buckle type temporary platform 3; this method has simple steps, is easy to operate, and has good effect.

[0035] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for the structure above a temporary flow channel in a siphon well, characterized in that, Includes the following steps: S1. Configure a first sidewall (11) and a second sidewall (12) of a temporary flow channel (1), wherein the first sidewall (11) is higher than the second sidewall (12), and there is a gap (4) between the top of the second sidewall (12) and the bottom of the auxiliary structure (21) of the siphon well (2) to be constructed; S2. A temporary platform (3) is set between the first side wall (11) and the second side wall (12). The temporary platform (3) includes several crossbeam members (31). The crossbeam members (31) include hooks (311) and crossbars (312). The hooks (311) are connected to one end of the crossbars (312). The hooks (311) are hooked back onto the top of the first side wall (11). The other end of the crossbars (312) is attached to the top of the second side wall (12). S3. A template for casting the auxiliary structure (21) is set on the temporary platform (3).

2. The construction method of the structure above the temporary flow channel of the siphon well according to claim 1, characterized in that, In step S1, if the first side wall (11) and the second side wall (12) initially have the same elevation, the top of the second side wall (12) is broken to leave the gap (4).

3. The construction method of the structure above the temporary flow channel of the siphon well according to claim 1, characterized in that, In step S2, the crossbeam members (31) are spaced apart along the length of the temporary flow channel (1), and all the crossbeam members (31) are connected as a whole by the longitudinal connecting members (32).

4. The construction method of the structure above the temporary flow channel of the siphon well according to claim 3, characterized in that, The crossbeam member (31) is a steel structure, and the longitudinal connecting member (32) is a steel bar. Several steel bars are spaced apart along the width direction of the temporary flow channel (1), and the steel bars are welded to the crossbeam member (31).

5. The construction method of the structure above the temporary flow channel of the siphon well according to claim 3, characterized in that, The spacing between adjacent crossbeam members (31) is 0.3m to 0.6m.

6. The construction method of the structure above the temporary flow channel of the siphon well according to claim 1, characterized in that, Both the hook (311) and the crossbar (312) are made of shaped steel, and the hook (311) and the crossbar (312) are welded together.

7. The construction method of the structure above the temporary flow channel of the siphon well according to claim 1, characterized in that, The hook (311) includes a first rod (3111), a second rod (3112) and a third rod (3113) connected in sequence. The third rod (3113) is connected to the crossbar (312). The first rod (3111) is attached to the outside of the first side wall (11), the second rod (3112) is attached to the top of the first side wall (11), and the third rod (3113) is attached to the inside of the first side wall (11). The crossbar (312) is horizontally arranged.

8. The construction method of the structure above the temporary flow channel of the siphon well according to any one of claims 1-7, characterized in that, Step S3 includes: S31. Use the temporary platform (3) to cast the base plate (211) of the auxiliary structure (21) and cure it to shape; S32. The vertical wall (212) of the auxiliary structure (21) is cast using the temporary platform (3) and the base plate (211).

9. The construction method of the structure above the temporary flow channel of the siphon well according to claim 8, characterized in that, There is a construction joint (213) between the base plate (211) and the vertical wall (212), and a water-stopping component (214) is embedded in the construction joint (213).

10. The construction method of the structure above the temporary flow channel of the siphon well according to claim 8, characterized in that, Several longitudinal beams are provided on all the crossbeam components (31), and several square timbers are provided on all the longitudinal beams. Plywood is provided on the square timbers, and the plywood is used as the bottom mold and platform panel of the base plate (211).

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