阅读说明：本技术 适用于已有池壁后埋套管的结构及施工方法 (Structure suitable for rear buried sleeve of existing pool wall and construction method ) 是由 段更月 侯锋 邵彦青 *** 何国钢 庞洪涛 *** 韩颖 卢先春 于 2019-10-18 设计创作，主要内容包括：本发明提供了一种适用于已有池壁后埋套管的结构,包括：防水套管(1)、预埋环形钢板(3)、附加箍筋(8)以及环形附加钢筋(9)；所述附加箍筋(8)、环形附加钢筋(9)、防水套管(1)以及预埋环形钢板(3)分别固定在池壁上；所述附加箍筋(8)与环形附加钢筋(9)连接；所述防水套管(1)与预埋环形钢板(3)连接。本发明相比常规单一附加钢筋加固,带锚筋钢板与附加钢筋的复合型加固方式使结构安全性显著提高,承载模式合理。普通模板支模困难,混凝土施工质量差,浇筑时套管移动错位,对拉止水螺栓的气割端头处易渗水,而带锚筋钢板安装方便,钢模板适用于后浇异型区域,钢模板与套管周圈焊接,有利于套管的固定。(The invention provides a structure suitable for an existing tank wall rear buried sleeve, which comprises: the waterproof sleeve comprises a waterproof sleeve (1), a pre-embedded annular steel plate (3), an additional stirrup (8) and an annular additional steel bar (9); the additional stirrups (8), the annular additional steel bars (9), the waterproof sleeves (1) and the embedded annular steel plates (3) are respectively fixed on the pool wall; the additional stirrups (8) are connected with annular additional reinforcing steel bars (9); the waterproof sleeve (1) is connected with the embedded annular steel plate (3). Compared with the conventional single additional steel bar reinforcement, the composite reinforcement mode of the steel plate with the anchor bars and the additional steel bars obviously improves the structural safety and has reasonable bearing mode. The common template is difficult to support, the concrete construction quality is poor, the sleeve moves and is dislocated during pouring, water seepage is easy to occur at the gas cutting end of the counter-pulling water-stopping bolt, the steel template with the anchor bars is convenient to install, the steel template is suitable for a post-pouring special-shaped area, and the steel template is welded with the periphery of the sleeve, so that the sleeve is favorably fixed.)

1. A structure suitable for use in an existing tank wall rear buried pipe, comprising: the waterproof sleeve comprises a waterproof sleeve (1), a pre-embedded annular steel plate (3), an additional stirrup (8) and an annular additional steel bar (9);

the additional stirrups (8), the annular additional steel bars (9), the waterproof sleeves (1) and the embedded annular steel plates (3) are respectively fixed on the pool wall;

the additional stirrups (8) are connected with annular additional reinforcing steel bars (9);

the waterproof sleeve (1) is connected with the embedded annular steel plate (3).

2. The structure of claim 1, further comprising: the waterproof structure comprises an additional coiled material waterproof layer (4), wherein the additional coiled material waterproof layer (4) is arranged at the outer edge of the embedded annular steel plate (3).

3. The structure of claim 1, further comprising: a water-swelling seal bar (5) when meeting water; the water-swelling water stop strip (5) is arranged on the pool wall.

4. The structure suitable for the existing post-buried sleeve of the pool wall as claimed in claim 1, wherein the pre-buried annular steel plate (3) is provided with a pouring hole (14).

5. The structure suitable for the existing wall post-sleeve according to claim 4, characterized in that the grouting hole (12) is poured with grouting material (7).

6. A construction method suitable for burying a sleeve behind an existing pool wall is characterized by comprising the following steps:

step 1: burying a sleeve pipe region behind the pool wall, breaking concrete to form a hole, and cutting a concrete protective layer on the pool wall around the hole;

step 2: processing the hole interface formed by breaking the original pool wall, the peripheral area of the hole of the pool wall and the exposed reinforcing steel bars of the original pool wall;

and step 3: taking measures to fix the additional stirrups (8), the annular additional steel bars (9), the waterproof sleeves (1), the embedded annular steel plates (3) and the anchor bars (13) at corresponding positions on the pool wall;

and 4, step 4: pouring grouting materials (7) into the pouring holes in the pre-buried annular steel plates (3), wherein the grouting materials (7) are fine aggregate concrete; the strength grade of the concrete is improved by one grade compared with the original concrete, and an expanding agent is doped;

and 5: after the concrete curing is finished, an additional coiled material waterproof layer (4) with the width of 200mm is manufactured at the outer edge of the embedded annular steel plate (3).

7. The construction method suitable for the existing wall-buried sleeve according to claim 6, wherein the step 1 comprises:

step 1.1, positioning the position of a rear buried sleeve on the pool wall;

step 1.2, breaking the concrete at the positioning position to form a hole, and reserving the original pool wall reinforcing steel bars (6) as much as possible; the hole range is that the hole is expanded by 300mm to a new and old concrete interface (10) at the outer edge position of the sleeve;

step 1.3, removing the original concrete protective layer on the surface of the area which is not broken at the periphery of the pool wall opening and is covered by the later-stage embedded annular steel plate (3); the range is that the extension of the outer edge of the embedded annular steel plate (3) from the interface of new and old concrete is not less than 80 mm.

8. The construction method suitable for the existing wall-buried sleeve of the pool as claimed in claim 6, wherein the step 2 comprises:

step 2.1, roughening the surface of the interface (10) of the new concrete and the old concrete, washing the interface, coating a layer of interface agent, and placing a water-swelling water stop strip (5) at the center of the thickness of the pool wall;

step 2.2, straightening and bending the exposed original pool wall reinforcing steel bars (6) at the hole; and cleaning and removing the original pool wall reinforcing steel bars (6) exposed out of the concrete protective layer.

9. The construction method suitable for the existing wall-buried sleeve according to claim 6, wherein the step 3 comprises:

step 3.1, completing the waterproof casing (1);

step 3.2, the number of the additional stirrups (8) is radially arranged according to the most dense distance of 200 mm; the area of the additional circumferential steel bar (9) is more than or equal to 0.75 time of the area of the cut steel bar;

step 3.3, the embedded annular steel plate (3) is 10mm thick, the size of the inner radius of the steel plate is equal to that of the outer radius of the sleeve, and the outer radius of the steel plate is 380mm larger than that of the inner radius of the steel plate; a pouring hole with the diameter of 50mm multiplied by 100mm is arranged on the pre-embedded annular steel plate (3), and an anchor bar (13) is welded on the inner side of the steel plate.

10. The construction method suitable for the existing wall-buried sleeve of the pool as claimed in claim 6, wherein the step 4 comprises:

step 4.1, fixing the additional reinforcing steel bars (8) and the annular additional reinforcing steel bars (9) in the hole area on the reinforcing steel bars (6) of the original pool wall through binding or welding;

step 4.2, the waterproof sleeve (1) is fixed at the corresponding position of the pool wall by welding with the additional steel bar (8), the annular additional steel bar (9) or the original pool wall steel bar (6);

step 4.3, welding and fixing the embedded annular steel plate (3) with the original pool wall steel bar (6), adjusting the positions of the steel bar and the steel plate during welding, and ensuring that the outer side of the steel plate is flush with the surface of the pool wall; the inner edge of the pre-buried annular steel plate (3) is welded and fixed with the edge of the waterproof sleeve (1), so that the quality of the welding seam (2) is qualified, and no gap is left.

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a structure and a construction method suitable for an existing tank wall rear buried sleeve.

Background

At present, in the construction process of structures of the projects of traditional overground sewage plants and underground (sunken) sewage plants, a large number of embedded sleeves are embedded on the wall of a reinforced concrete pool. The conventional design and construction are that the sleeve is embedded firstly and then the concrete is cast in place, so that the integrity of the area can be relatively ensured. However, the replacement of equipment or the adjustment of a process may cause the increase or decrease of the casing or the change of the position, and when the construction of the wall of the structure pool is completed, the casing needs to be bored and then buried. Conventionally, a self-waterproof casing for a pipeline passing through a pool wall, as disclosed in patent document CN107120481A, is mainly composed of a steel casing, a steel water stop ring, a rubber ferrule, a clamp, and a V-shaped rubber water stop strip; the main working principle and the installation method are as follows: when concrete is poured on the wall of the pool, the steel sleeve and the steel water stop ring are embedded in the concrete, the rubber ferrule faces the upstream face of the pool, after the concrete reaches a certain strength, a pipeline needing to penetrate through penetrates through the steel sleeve, the V-shaped rubber water stop strip is inserted into a gap between the rubber ferrule and the pipeline, finally the clamping hoop is sleeved on the rubber ferrule, a bolt on the clamping hoop is screwed, the rubber ferrule and the V-shaped rubber water stop strip are clamped tightly, waterproof glue is applied to the joint of the V-shaped rubber water stop strip, and the installation work is completed.

However, in the reconstruction and upgrading of the established water plant, the working condition that the post-casing pipe penetrates through the tank wall inevitably occurs. The method for embedding the sleeve on the wall of the finished working pool is not standard, the sleeve is often installed by a construction unit, the waterproof effect is poor, the phenomena of water seepage and cracks often occur in the constructed sleeve area, and the durability of the joint is poor. The post-buried sleeves do not have the targeted measures proposed for different sizes of sleeves. Some large-diameter rear buried sleeves pay attention to water prevention and neglect a reinforcing method, and the integrity of the structure is damaged by punching, even potential safety hazards are caused. And the formwork is difficult to support in construction of certain rear buried sleeve breaking areas, and the pouring quality of grouting materials cannot be guaranteed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a structure and a construction method suitable for an existing pool wall rear buried sleeve.

The invention provides a structure suitable for an existing tank wall rear buried sleeve, which comprises: the waterproof sleeve comprises a waterproof sleeve 1, a pre-embedded annular steel plate 3, an additional stirrup 8 and an annular additional steel bar 9;

the additional stirrups 8, the annular additional steel bars 9, the waterproof sleeves 1 and the pre-buried annular steel plates 3 are respectively fixed on the pool wall;

the additional stirrups 8 are connected with annular additional reinforcing steel bars 9;

the waterproof sleeve 1 is connected with the embedded annular steel plate 3.

Preferably, the method further comprises the following steps: and an additional coiled material waterproof layer 4, wherein the additional coiled material waterproof layer 4 is arranged at the outer edge of the embedded annular steel plate 3.

Preferably, the method further comprises the following steps: a water-swelling seal 5; the water-swelling water stop strip 5 is arranged on the pool wall.

Preferably, the embedded annular steel plate 3 is provided with a pouring hole 14.

Preferably, the grouting material 7 is poured in the pouring hole 12.

The construction method suitable for the existing buried sleeve behind the pool wall provided by the invention comprises the following steps:

step 1: burying a sleeve pipe region behind the pool wall, breaking concrete to form a hole, and cutting a concrete protective layer on the pool wall around the hole;

step 2: processing the hole interface formed by breaking the original pool wall, the peripheral area of the hole of the pool wall and the exposed reinforcing steel bars of the original pool wall;

and step 3: taking measures to fix the additional stirrups (8), the annular additional steel bars (9), the waterproof sleeves (1), the embedded annular steel plates (3) and the anchor bars (13) at corresponding positions on the pool wall;

and 4, step 4: pouring grouting materials (7) into the pouring holes in the pre-buried annular steel plates (3), wherein the grouting materials (7) are fine aggregate concrete; the strength grade of the concrete is improved by one grade compared with the original concrete, and an expanding agent is doped;

and 5: after the concrete curing is finished, an additional coiled material waterproof layer (4) with the width of 200mm is manufactured at the outer edge of the embedded annular steel plate (3).

Preferably, the step 1 comprises:

step 1.1, positioning the position of a rear buried sleeve on the pool wall;

step 1.2, breaking the concrete at the positioning position to form a hole, and reserving the original pool wall reinforcing steel bars 6 as much as possible; the range of the hole is that the hole is expanded by 300mm to a new and old concrete interface 10 at the outer edge of the sleeve;

step 1.3, removing the original concrete protective layer on the surface of the area which is not broken at the periphery of the pool wall opening and is covered by the later-stage embedded annular steel plate 3; the range is that the extension of the outer edge of the embedded annular steel plate 3 from the interface of the new concrete and the old concrete is not less than 80 mm.

Preferably, the step 2 includes:

step 2.1, roughening the surface of the new and old concrete interface 10, washing the interface, coating a layer of interface agent, and placing a water-swelling water stop strip 5 at the center of the thickness of the pool wall;

step 2.2, straightening and bending the exposed original pool wall reinforcing steel bars 6 at the hole; and cleaning and removing the original pool wall steel bars 6 exposed out of the concrete protective layer.

Preferably, the step 3 comprises:

step 3.1, completing the waterproof casing 1;

step 3.2, the number of the additional stirrups 8 is radially arranged according to the most dense distance of 200 mm; the area of the additional annular steel bar 9 is more than or equal to 0.75 time of the area of the cut-off steel bar;

step 3.3, the embedded annular steel plate 3 is 10mm thick, the size of the inner radius of the steel plate is equal to that of the outer radius of the sleeve, and the outer radius of the steel plate is 380mm larger than that of the inner radius of the steel plate; a pouring hole with the diameter of 50mm multiplied by 100mm is arranged on the pre-embedded annular steel plate 3, and an anchor bar 13 is welded on the inner side of the steel plate.

Preferably, the step 4 comprises:

step 4.1, fixing the additional reinforcing steel bars 8 and the annular additional reinforcing steel bars 9 in the hole area on the original pool wall reinforcing steel bars 6 through binding or welding;

step 4.2, the waterproof casing 1 is fixed at the corresponding position of the pool wall by welding with the additional steel bar 8, the annular additional steel bar 9 or the original pool wall steel bar 6;

step 4.3, welding and fixing the embedded annular steel plate 3 and the original pool wall steel bar 6, adjusting the positions of the steel bar and the steel plate during welding, and ensuring that the outer side of the steel plate is flush with the surface of the pool wall; the inner edge of the pre-buried annular steel plate 3 is welded and fixed with the edge of the waterproof sleeve 1, so that the quality of the welding seam 2 is qualified, and no gap is left.

Compared with the prior art, the invention has the following beneficial effects:

1. compared with the conventional single additional steel bar reinforcement, the composite reinforcement mode of the steel plate with the anchor bars and the additional steel bars obviously improves the structural safety and has reasonable bearing mode.

2. The common template is difficult to support, the concrete construction quality is poor, the sleeve moves and is dislocated during pouring, water seepage is easy to occur at the gas cutting end of the counter-pulling water-stopping bolt, the steel template with the anchor bars is convenient to install, the steel template is suitable for a post-pouring special-shaped area, and the steel template is welded with the periphery of the sleeve, so that the sleeve is favorably fixed.

3. The embedded steel plate and the additional waterproof layer reinforce the original waterproof method, so that the waterproof and seepage-proof effects are better; the embedded steel plate has low cost, simple manufacture, convenient installation and good later concrete forming quality, and has multiple functions of waterproofing, reinforcing and fixing the template.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic overall structure diagram of a rear buried sleeve suitable for an existing pool wall according to the present invention.

Fig. 2 is a schematic plan view of a structural anchor rib embedded steel plate suitable for an existing pool wall rear embedded sleeve provided by the invention.

The figures show that:

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1 to 2, the present invention provides a structure suitable for an existing wall rear buried pipe, including: the waterproof sleeve comprises a waterproof sleeve 1, a pre-embedded annular steel plate 3, an additional stirrup 8 and an annular additional steel bar 9; the additional stirrups 8, the annular additional steel bars 9, the waterproof sleeves 1 and the pre-buried annular steel plates 3 are respectively fixed on the pool wall; the additional stirrups 8 are connected with annular additional reinforcing steel bars 9; the waterproof sleeve 1 is connected with the embedded annular steel plate 3; further comprising: an additional coiled material waterproof layer 4, wherein the additional coiled material waterproof layer 4 is arranged at the outer edge of the embedded annular steel plate 3; further comprising: a water-swelling seal 5; the water-swelling water stop strip 5 is arranged on the pool wall. A pouring hole 14 is formed in the embedded annular steel plate 3; the grouting material 7 is poured in the pouring hole 12.

The construction method suitable for the existing buried sleeve behind the pool wall provided by the invention comprises the following steps:

step 1: burying a sleeve pipe region behind the pool wall, breaking concrete to form a hole, and cutting a concrete protective layer on the pool wall around the hole;

step 2: processing the hole interface formed by breaking the original pool wall, the peripheral area of the hole of the pool wall and the exposed reinforcing steel bars of the original pool wall;

and step 3: taking measures to fix the additional stirrups (8), the annular additional steel bars (9), the waterproof sleeves (1), the embedded annular steel plates (3) and the anchor bars (13) at corresponding positions on the pool wall;

and 4, step 4: pouring grouting materials (7) into the pouring holes in the pre-buried annular steel plates (3), wherein the grouting materials (7) are fine aggregate concrete; the strength grade of the concrete is improved by one grade compared with the original concrete, and an expanding agent is doped;

and 5: after the concrete curing is finished, an additional coiled material waterproof layer (4) with the width of 200mm is manufactured at the outer edge of the embedded annular steel plate (3).

The step 1 comprises the following steps:

step 1.1, positioning the position of a rear buried sleeve on the pool wall;

step 1.2, breaking the concrete at the positioning position to form a hole, and reserving the original pool wall reinforcing steel bars 6 as much as possible; the range of the hole is that the hole is expanded by 300mm to a new and old concrete interface 10 at the outer edge of the sleeve; the first distance 11 in fig. 1 is the distance from the interface to the casing centerline.

Step 1.3, removing the original concrete protective layer on the surface of the area which is not broken at the periphery of the pool wall opening and is covered by the later-stage embedded annular steel plate 3; the range is that the extension of the outer edge of the embedded annular steel plate 3 from the interface of the new concrete and the old concrete is not less than 80mm, and the extension is a second distance 12.

The step 2 comprises the following steps:

step 2.1, roughening the surface of the new and old concrete interface 10, washing the interface, coating a layer of interface agent, and placing a water-swelling water stop strip 5 at the center of the thickness of the pool wall;

step 2.2, straightening and bending the exposed original pool wall reinforcing steel bars 6 at the hole; and cleaning and removing the original pool wall steel bars 6 exposed out of the concrete protective layer.

The step 3 comprises the following steps:

step 3.1, completing the waterproof casing 1;

step 3.2, the number of the additional stirrups 8 is radially arranged according to the most dense distance of 200 mm; the area of the additional annular steel bar 9 is more than or equal to 0.75 time of the area of the cut-off steel bar;

step 3.3, the embedded annular steel plate 3 is 10mm thick, the size of the inner radius of the steel plate is equal to that of the outer radius of the sleeve, and the outer radius of the steel plate is 380mm larger than that of the inner radius of the steel plate; a pouring hole with the diameter of 50mm multiplied by 100mm is arranged on the pre-embedded annular steel plate 3, and an anchor bar 13 is welded on the inner side of the steel plate.

The step 4 comprises the following steps:

step 4.1, fixing the additional reinforcing steel bars 8 and the annular additional reinforcing steel bars 9 in the hole area on the original pool wall reinforcing steel bars 6 through binding or welding;

step 4.2, the waterproof casing 1 is fixed at the corresponding position of the pool wall by welding with the additional steel bar 8, the annular additional steel bar 9 or the original pool wall steel bar 6;

step 4.3, welding and fixing the embedded annular steel plate 3 and the original pool wall steel bar 6, adjusting the positions of the steel bar and the steel plate during welding, and ensuring that the outer side of the steel plate is flush with the surface of the pool wall; the inner edge of the pre-buried annular steel plate 3 is welded and fixed with the edge of the waterproof sleeve 1, so that the quality of the welding seam 2 is qualified, and no gap is left.

In a preferred embodiment, the weld seam 2 is a weld seam of a sleeve and a steel plate, and the nominal diameter of the sleeve is between DN300 and DN 600. The pre-buried steel plate with the anchor bars in the device has the functions of water proofing, reinforcement, sleeve fixing and template. The existing pool wall is damaged by adding the medium-sized and large-sized sleeve, the structure safety is influenced, a simple measure of only adopting an additional steel bar is usually taken, and the embedded steel plate and the attached anchor bar in the method have more comprehensive and better reinforcement performance. The method for casting the concrete post-cast area utilizes the embedded steel plate as a casting steel template, and a casting hole is formed above the embedded steel plate for casting the grouting material, so that the method is simple and easy to implement and has a good forming effect. Meanwhile, the embedded steel plate has a certain waterproof effect on the coverage area, and the waterproof sleeve is welded and fixed on the embedded steel plate, so that the waterproof sleeve is firmer.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.