CN217601487U - Dredging well plugging construction node - Google Patents

Abstract

The utility model discloses a dredging well shutoff construction node, including the dredging well, the top of dredging well is provided with the reinforcing bar that the multiunit equidistance distributes along its circumferencial direction, the well head department of dredging well is provided with seamless steel pipe, seamless steel pipe part stretches into in the dredging well, seamless steel pipe's outer wall and steel bar welding, the top fixedly connected with concrete cushion of dredging well, and the outer wall fixed connection of concrete cushion and seamless steel pipe, the first waterproof layer of top fixedly connected with of concrete cushion, the top fixedly connected with bottom plate of first waterproof layer, the bottom inner wall of dredging well is provided with the level and joins in marriage the grit, the top fixedly connected with micro-expansion concrete of level and joining in marriage the grit, and micro-expansion concrete and seamless steel pipe fixed connection, the top welding of seamless steel pipe has the steel sheet. The utility model provides a great shutoff of secret water pressure problem of being difficult for the construction, still improved the waterproof continuity of bottom plate simultaneously, solved the problem of the easy percolating water of dredging well shutoff, reduced the later maintenance expense.

Description

Dredging well shutoff construction node

Technical Field

The utility model relates to a housing construction field especially relates to a dry well shutoff construction node.

Background

The dewatering well is a dewatering well, underground water dewatering is a condition meeting engineering construction requirements under the constraint of given point water level dewatering requirement which is inevitably adopted in activities such as underground excavation engineering, open-pit mining engineering and the like, and the dewatering well is arranged in a foundation pit.

The application is improved under the prior art, and in the prior art, along with the continuous development of urban construction, the construction of deep foundation buildings often encounters the problem of underground water, particularly, in the sections along rivers and the sections with abundant underground water, the construction is often failed due to the open water in the foundation pit with high underground water level and large depth, in the underground works work progress, in order to reduce the too high adverse effect that brings for the construction of ground water level, need set up the mediation well in the foundation slab usually, drop ground water level to the design water level, ensure the stability of foundation ditch. However, the following two problems may occur during the plugging process of the drainage well:

1. the underground water pressure of the deep foundation pit in the underground water rich section is large, and the plugging construction difficulty is large;

2. after plugging of the drain well, water leakage is easily caused due to overlarge underground water pressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the dry well shutoff construction node that proposes.

In order to realize the above-mentioned purpose, the utility model provides a dredging well shutoff construction node, including the dredging well, the top of dredging well is provided with the reinforcing bar that the multiunit equidistance distributes along its circumferencial direction, the well head department of dredging well is provided with seamless steel pipe, seamless steel pipe part stretches into in the dredging well, the outer wall and the steel bar welding of seamless steel pipe, the top fixedly connected with concrete cushion of dredging well, and the outer wall fixed connection of concrete cushion and seamless steel pipe, the first waterproof layer of top fixedly connected with of concrete cushion, the top fixedly connected with bottom plate of first waterproof layer, the bottom inner wall of dredging well is provided with the gradation grit, the top of gradation grit is provided with the micro-expansion concrete, and micro-expansion concrete and seamless steel pipe fixed connection, the top welding of seamless steel pipe has the steel sheet.

In a preferred embodiment, a waterproof additional layer is fixedly connected to the internal corner between the seamless steel pipe and the concrete cushion layer, and the waterproof additional layer is located between the first waterproof layer and the concrete cushion layer.

In a preferred embodiment, a second waterproof layer is fixedly connected to the top of the steel plate, and the second waterproof layer is fixedly connected with the first waterproof layer.

In a preferred embodiment, the top of the second waterproof layer is fixedly connected with additional concrete, and the additional concrete is fixedly connected with the bottom plate, and the top of the additional concrete is flush with the top of the bottom plate.

In a preferred embodiment, the length of the micro-expansive concrete extending into the drib well is greater than four meters.

In a preferred embodiment, the outer wall of the dewatering well is fixedly connected with a gravel filler.

The utility model discloses following beneficial effect has: the utility model discloses a mode that the multilayer was handled step by step has solved the difficult problem of being under construction of the great shutoff of secret water pressure, has still improved the waterproof continuity of bottom plate simultaneously, has solved the problem of the easy percolating water of dredging well shutoff, has reduced the later maintenance expense.

Drawings

Fig. 1 is a schematic structural view of a plugging construction node of a drainage well of the utility model;

fig. 2 is a partial top view of the plugging construction node of the drainage well of the present invention;

fig. 3 is an enlarged schematic structural diagram of a in fig. 1 of the present invention.

Description of reference numerals:

the concrete waterproof structure comprises a steel bar 1, a seamless steel pipe 2, a steel plate 3, micro-expansion concrete 4, graded gravel 5, a drainage well 6, gravel fillers 7, a first waterproof layer 8, a concrete cushion layer 9, a bottom plate 10, a waterproof additional layer 11, additional concrete 12 and a second waterproof layer 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Example 1

As shown in fig. 1-3, the utility model discloses a dry shaft shutoff construction node, including dry shaft 6, dry shaft 6's top is provided with reinforcing bar 1 that multiunit equidistance distributes along its circumferencial direction, and dry shaft 6's well head department is provided with seamless steel pipe 2, and in seamless steel pipe 2 parts stretched into dry shaft 6, seamless steel pipe 2's outer wall and 1 welding of reinforcing bar. The top fixedly connected with concrete cushion 9 of sparse dry well 6, and the outer wall fixed connection of concrete cushion 9 and seamless steel pipe 2, the first waterproof layer 8 of top fixedly connected with of concrete cushion 9, the top fixedly connected with bottom plate 10 of first waterproof layer 8. The bottom inner wall of the dredging well 6 is provided with graded gravel 5, the top fixedly connected with of graded gravel 5 has micro-expansion concrete 4, and micro-expansion concrete 4 and seamless steel pipe 2 fixed connection, and the welding of the top of seamless steel pipe 2 has steel sheet 3.

Further, the reentrant corner department fixedly connected with between seamless steel pipe 2 and the concrete cushion 9 is with waterproof additional layer 11, and waterproof additional layer 11 is located between first waterproof layer 8 and the concrete cushion 9. The top of steel sheet 3 is fixedly connected with second waterproof layer 13, and second waterproof layer 13 and first waterproof layer 8 fixed connection.

Further, an additional concrete 12 is fixedly connected to the top of the second waterproof layer 13, and the additional concrete 12 is fixedly connected to the bottom plate 10, and the top of the additional concrete 12 is flush with the top of the bottom plate 10.

Furthermore, the length of the micro-expansion concrete 4 extending into the drainage well 6 is more than four meters, and the outer wall of the drainage well 6 is fixedly connected with a broken stone filler 7.

Further, the first waterproof layer 8 and the second waterproof layer 13 both adopt SBS waterproof coiled materials, and the thickness of the first waterproof layer 8 is 50mm.

Example 2

Use certain engineering as an example below, introduce the utility model discloses a specific work progress of dredging well shutoff construction node:

the diameter of a well hole of the engineering drainage well is 600mm, the well depth is 25m, the diameter of the outer side of a drainage well pipe well is 400mm, and the wall thickness is 30mm.

After the bottom of a foundation pit is leveled, placing cushion blocks around a well mouth of a dredging well 6 which is subjected to gravel filler 7 construction, arranging four symmetrically-arranged 150mm HRB 400-grade phi 20 steel bars 1, extending part of the steel bars 1 to the well mouth of the dredging well 6, and penetrating into the dredging well for 15.5mm, wherein the horizontal distance between the two steel bars 1 meets the diameter of a seamless steel pipe 2, and facilitating subsequent welding construction;

step two, full welding of the DN325 x 8 hot-rolled seamless steel tube 2 and the steel bar 1, construction of a C15 concrete cushion 9 after welding is finished, and pouring of the concrete cushion 9 is performed from the middle of four circumferences so as to ensure accurate position and difficult displacement of the seamless steel tube 2;

step three, after the concrete cushion layer 9 reaches a certain strength, constructing a first waterproof layer 8, wherein the thickness of the first waterproof layer is 50mm, treating a waterproof additional layer 11 at a position of a negative corner in the construction process, reserving a waterproof operation space with enough length at the top of the seamless steel pipe 2, and ensuring the reliability of waterproof construction;

step four, pouring concrete to form a bottom plate 10, reserving the upper part of the seamless steel pipe 2, and after the dewatering is allowed to stop, performing independent pouring;

stopping dewatering after the design requirement is met, filling the graded sandstone 5 into the drainage well 6, and measuring the filling elevation of the graded sandstone 5 in the process to ensure the height of the micro-expansive concrete 4;

step six, after the graded sandstone 5 is backfilled to the elevation, filling C40P8 micro-expansive concrete 4 to the pipe orifice of the seamless steel pipe 2, and ensuring that the height of the micro-expansive concrete 4 in the dredging well 6 is more than four meters;

welding the seamless steel tube 2 and the steel plate 3 in a full welding mode;

step eight, constructing a second waterproof layer 13 on the top of the seamless steel pipe 2;

and step nine, pouring concrete to form additional concrete 12, pouring to the elevation of the bottom plate 10, and completing plugging of the drainage well.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (6)

1. The utility model provides a drainage well shutoff construction node, includes drainage well (6), its characterized in that: the top of dredged well (6) is provided with reinforcing bar (1) that the multiunit equidistance distributes along its circumferencial direction, the well head department of dredged well (6) is provided with seamless steel pipe (2), seamless steel pipe (2) part stretches into in dredged well (6), just the outer wall of seamless steel pipe (2) with reinforcing bar (1) welding, the top fixedly connected with concrete cushion (9) of dredged well (6), just concrete cushion (9) and the outer wall fixed connection of seamless steel pipe (2), the first waterproof layer of top fixedly connected with (8) of concrete cushion (9), the top fixedly connected with bottom plate (10) of first waterproof layer (8), the bottom inner wall of dredged well (6) is provided with level and joins in marriage grit (5), the top of level and joining in marriage grit (5) is provided with micro-expansion concrete (4), just micro-expansion concrete (4) with seamless steel pipe (2) fixed connection, the top welding of seamless steel pipe (2) has steel sheet (3).

2. The drainage well plugging construction node of claim 1, wherein: the internal corner between the seamless steel pipe (2) and the concrete cushion (9) is fixedly connected with a waterproof additional layer (11), and the waterproof additional layer (11) is located between the first waterproof layer (8) and the concrete cushion (9).

3. The dredging well plugging construction node according to claim 2, wherein: the top fixedly connected with second waterproof layer (13) of steel sheet (3), just second waterproof layer (13) and first waterproof layer (8) fixed connection.

4. The drainage well plugging construction node of claim 3, wherein: the top of the second waterproof layer (13) is fixedly connected with additional concrete (12), the additional concrete (12) is fixedly connected with the bottom plate (10), and the top of the additional concrete (12) is flush with the top of the bottom plate (10).

5. The drainage well plugging construction node of claim 1, wherein: the length of the micro-expansion concrete (4) extending into the lyophobic well (6) is more than four meters.

6. The dredging well plugging construction node according to claim 1, wherein: the outer wall of the drying well (6) is fixedly connected with a gravel filler (7).

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