CN211849870U

CN211849870U - Seepage prevention and seepage prevention structure of sewage pipeline

Info

Publication number: CN211849870U
Application number: CN201922302392.8U
Authority: CN
Inventors: 全海锋; 韦谋; 殷小帮; 郭仲强; 韦增康
Original assignee: Fifth Construction Engineering Co of Guangxi Construction Engineering Group
Current assignee: Guangxi Construction Engineering Fifth Construction Engineering Group Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-11-03
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a sewage pipe's prevention of seepage hinders and oozes structure, sewage well under last sewage well, first sewage well, second, first sewage well sets up in last sewage well below, goes up sewage well and first sewage well through wearing the pipeline intercommunication down, and sewage well passes through sewage pipe intercommunication, its characterized in that under first sewage well and the second: the sewage pipeline is a concrete encapsulation pipeline and comprises two steel pipe bodies which are arranged in parallel, and the outer walls of the steel pipe bodies are encapsulated in reinforced concrete after being wrapped with hoops; and a high-pressure rotary jet grouting pile is arranged above the sewage pipeline to protect the sewage pipeline, and is positioned at the joint of the sewage pipeline and the first lower sewage well and the second lower sewage well. The utility model discloses a sewage pipeline's prevention of seepage hinders to ooze the structure and has stable prevention of seepage, long service life and construction convenience's characteristics.

Description

Seepage prevention and seepage prevention structure of sewage pipeline

Technical Field

The utility model relates to a construction technical field specifically indicates a sewage pipeline's prevention of seepage hinders and oozes structure.

Background

In the prior art, the cofferdam is formed by earthwork filling, sewage at a pipeline connector is led out to a position suitable for discharge, and if the flow of the sewage is large, a plurality of water pumps are adopted to pump water in a matching way, so that large-area water accumulation is avoided, and the field construction is not influenced. Moreover, this method also has the following drawback: for example, for the treatment of pipe explosion of a large amount of sewage pipes in the inverted siphon, the water flow is huge due to the inverted siphon action, water cannot be completely introduced into a specified position by adopting a cofferdam drainage method, the water cannot be completely treated even though a water pump is matched, the field construction is influenced and the construction mechanical equipment is damaged due to the accumulated water.

In recent years, the infrastructure development of China is rapid, a plurality of municipal supporting facilities are newly built and old municipal supporting reconstruction is carried out, and the problems that pipelines burst or old inverted siphon pipelines are replaced frequently occur in underground pipeline construction. The drainage can not be ensured to be smooth by adopting the traditional cofferdam or drainage method under the condition of not influencing the field working site. And when old pipelines are replaced, the lives of surrounding residents are influenced certainly, and unnecessary contradictions between municipal building construction and the surrounding residents are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sewage pipe's prevention of seepage hinders and oozes structure has stable prevention of seepage, long service life and construction convenience's characteristics.

The utility model discloses can realize through following technical scheme:

the utility model discloses an antiseep of sewer line hinders and oozes structure, including last sewer well, first sewer well, the sewer well under the second, first sewer well sets up in last sewer well below, goes up the sewer well and communicates through wearing the pipeline down with first sewer well, and first sewer well and second sewer well pass through the sewer line and communicate, and the sewer line is concrete envelope pipeline, and the sewer line includes two parallel steel body, and the outer wall of steel body wraps up after having the hoop and encapsulates inside reinforced concrete; and a high-pressure rotary jet grouting pile is arranged above the sewage pipeline to protect the sewage pipeline, and is positioned at the joint of the sewage pipeline and the first lower sewage well and the second lower sewage well.

Further, a concrete cushion layer is arranged between the concrete encapsulating pipeline and the supporting ground.

Furthermore, the number of the high-pressure rotary spraying piles is a plurality of piles in parallel, the high-pressure rotary spraying piles are arranged at intervals, and the interval between every two adjacent high-pressure rotary spraying piles is 40 cm.

Another aspect of the present invention is a method for protecting the anti-seepage and anti-seepage structure of the sewage pipeline, comprising the steps of: construction preparation → pumping pipe network is used for pumping water → underwater bricking is carried out to plug the mouth of a sewage pipeline of a sewage well → excavation of the earthwork of the sewage pipeline → dismantling of the original sewage pipeline → installation and replacement of the sewage pipeline → encapsulation and sealing inspection of the concrete pipeline → addition of high-pressure jet grouting pile stabilizing pipe walls at the two ends of the pipeline → closing of the pumping pipe network → inspection of drainage of the newly built sewage pipeline. The method comprises the following specific steps:

s1, construction preparation: compiling a special scheme for replacing the inverted siphon culvert pipe, and purchasing materials;

s2, pumping water through a water pumping pipe network: according to the arrangement of a water pumping pipe network, a water collecting pit is dug at the upstream end of a sewage pipeline to be replaced, a water stopping steel plate is arranged on the periphery of the water collecting pit, and the installation position of a slurry pump and the direction of the water pumping pipeline need to be debugged before the water stopping steel plate is installed;

s3, laying bricks underwater to block the sewage pipeline mouth of the sewage well: the method of laying bricks underwater is adopted to plug the sewage pipe opening of the sewage pipe to be replaced, so that sewage is prevented from flowing into the sewage pipe to be replaced;

s4, excavating earthwork of the sewage pipeline: after the two ends of the culvert pipe are sealed, draining water in the underpass channel including the leaking buried culvert pipe, excavating original pipeline earthwork, arranging a water collecting pit in the middle of three meters of the side edge of the sewage pipeline before excavating the earthwork, excavating a drainage ditch, and arranging a water pump arranged in the water collecting pit to discharge the leaking water of the original sewage pipeline;

s5, installing and replacing a new sewage pipeline: before the trench is excavated, a water collecting pit is arranged on the east side of the trench, water in the trench is pumped and drained, water is not accumulated in the trench, and a pipeline foundation is leveled according to the original pipeline foundation; the pipe is arranged from downstream to upstream in sequence, the bell mouth is arranged in the upstream direction, the socket is arranged in the downstream direction, and half short pipes are adopted at the joints of the first sewage well, the second sewage well and the pipeline;

s6, encapsulation and sealing inspection of the concrete pipeline: arranging a 360-degree reinforced concrete envelope on the steel pipe body, wherein the reinforced concrete envelope is completed in three steps, namely, firstly encapsulating pipes at two ends and then plugging a middle pipe; the encapsulation adopts C40 reinforced concrete;

s7, adding two ends of the pipeline to stabilize the pipe wall of the high-pressure jet grouting pile: after the two sewage pipelines are treated, the high-pressure rotary jet grouting pile is used for preventing the side wall of the protection pipe from being damaged due to overlarge pressure, so that the safe and reliable use of the inverted siphon double pipe in municipal engineering after the vehicle is started is ensured;

s8, closing the water pumping pipe network, and checking drainage: and closing the water pumping pipe network, checking whether the large-flow inverted siphon sewage discharge is smooth or not under the condition that water is not pumped, and if the discharge is smooth and effective for 48 hours and no leakage exists, proving that the water seepage is finished.

Further, in step S3, the mortar used is a waterproof mortar dedicated for underwater masonry.

Further, in step S6, before the sewage pipe is laid, the inner surface of the socket of the pipe joint and the outer surface of the socket are cleaned with steel wire brushes to remove oil contamination and sundries, a corresponding rubber sealing ring is selected according to the pipe diameter specification and is sleeved in the socket groove, the periphery is required to be uniform, smooth and free of distortion, and waterproof paint 851 is coated on the surface of the rubber sealing ring and the inner surface of the front pipe to prevent water seepage: when the pipe is lowered, the lifting point is arranged at the gravity center of the pipe and lifted by a waist-blocking lifting mode or a special lifting appliance is adopted; the method of using the steel cable to penetrate the pipe and hang the pipe is forbidden, and when the pipe is hung and hung, the pipe joint interface is prevented from being damaged; when the pipe is laid, the pipe joint is stably hung down and translated to the joint of the calandria, the elevation and the axis of the pipe joint are adjusted, then the socket of the pipe is slowly inserted into the bell mouth by using pipe tightening equipment, the pipe joint still needs to be hung in the process of pipe socket insertion so as to reduce the pulling force when the pipe is tightened, the axis and the elevation of the pipe are adjusted, and then the pipe is compacted by using a pipe pillow; when the pipe joint is inserted, attention should be paid to the fact that the rubber ring does not twist or fall off the groove.

The utility model relates to a sewage pipeline's prevention of seepage hinders and oozes structure has following beneficial effect:

firstly, stable seepage prevention is realized, the peripheral soil quality is stabilized by adding the high-pressure jet grouting pile, the upper concrete layer of the sewage pipeline is thickened, the pipe body of the sewage pipeline is protected, the influence on the environmental geology is reduced, and a good seepage prevention effect is realized;

secondly, the service life is long, the high-pressure rotary jet grouting piles are additionally arranged on the two sides of the sewage pipeline and are used for protecting the side wall of the sewage pipeline, the damage of the sewage pipeline caused by overlarge pressure is avoided, the safe and reliable use of the sewage pipeline after being put into use is ensured, and the service life is prolonged;

third, construction convenience, and original traditional sewage pipe trades tub prevention of seepage prevention and hinders the technique of oozing, the utility model discloses can change the sewage pipe under the unblocked circumstances of the large-traffic sewage drainage of assurance back siphon, do not influence normal municipal sewage drainage, avoid the communication contradiction of unnecessary resident life and municipal construction.

Drawings

FIG. 1 is a schematic view of the general layout of an anti-seepage and anti-seepage structure construction site of a sewage pipeline of the utility model;

FIG. 2 is a schematic sectional view taken along line 1-1 of FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure of an anti-seepage and anti-seepage structure of a sewage pipeline of the present invention;

the reference numbers in the drawings include: 100. going to a sewage well; 200. a first lower bilge well; 300. a second lower bilge well; 400. passing a pipeline downwards; 500. a sewage conduit; 501. a steel pipe body; 502. a hoop; 503. reinforced concrete; 504. a concrete cushion layer; 600. high-pressure jet grouting pile.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a detailed description of the product of the present invention with reference to the embodiments and the accompanying drawings.

Example 1

As shown in fig. 1-3, the utility model discloses a sewage conduit 500 prevents seepage structure that oozes by seepage, including last bilge well 100, first bilge well 200, bilge well 300 under the second, first bilge well 200 sets up in last bilge well 100 below, goes up bilge well 100 and first bilge well 200 and passes through pipeline 400 intercommunication down, first bilge well 200 and second bilge well 300 pass through sewage conduit 500 and communicate down, sewage conduit 500 is concrete envelope pipeline, sewage conduit 500 includes two parallel arrangement's steel body 501, envelope inside reinforced concrete 503 after the outer wall of steel body 501 wraps up with annular storehouse 502; the high-pressure jet grouting pile 600 is arranged above the sewage pipeline 500 for protecting the sewage pipeline, and the high-pressure jet grouting pile 600 is positioned at the joint of the sewage pipeline 500 and the first lower sewage well 200 and the second lower sewage well 300.

As shown in fig. 2 and fig. 3, in this embodiment, a concrete cushion 504 is disposed between the concrete-enclosed pipe and the supporting ground, the number of the high-pressure jet grouting piles 600 is several, the high-pressure jet grouting piles 600 are disposed side by side, and the interval between adjacent high-pressure jet grouting piles 600 is 40 cm.

Example 2

In this embodiment, the mortar used in step S3 is a waterproof mortar dedicated for underwater masonry. Step S6, before laying sewage pipe, cleaning oil dirt and sundries by using steel wire brush on the inner surface of socket of pipe joint and the outer surface of socket, selecting corresponding rubber sealing ring according to pipe diameter specification, and sleeving the rubber sealing ring into socket groove, requiring to be uniform, smooth and distortion-free, smearing waterproof paint '851' on the surface of rubber sealing ring and the inner surface of front pipe, preventing water seepage: when the pipe is lowered, the lifting point is arranged at the gravity center of the pipe and lifted by a waist-blocking lifting mode or a special lifting appliance is adopted; the method of using the steel cable to penetrate the pipe and hang the pipe is forbidden, and when the pipe is hung and hung, the pipe joint interface is prevented from being damaged; when the pipe is laid, the pipe joint is stably hung down and translated to the joint of the calandria, the elevation and the axis of the pipe joint are adjusted, then the socket of the pipe is slowly inserted into the bell mouth by using pipe tightening equipment, the pipe joint still needs to be hung in the process of pipe socket insertion so as to reduce the pulling force when the pipe is tightened, the axis and the elevation of the pipe are adjusted, and then the pipe is compacted by using a pipe pillow; when the pipe joint is inserted, attention should be paid to the fact that the rubber ring does not twist or fall off the groove.

Example 3

Combine specific construction conditions right the utility model discloses an operating principle explains as follows:

s1, preparation for construction

The method is characterized in that a special scheme for replacing the inverted siphon culvert pipes is compiled, a special pipe network design is carried out aiming at the key difficulty of each project, a pipeline installation unit is contacted to prepare purchased materials, the quantity and the type of the purchased materials are determined according to the characteristic conditions of the project, a newly-built project at the intersection of a Xiangjiang restaurant on a certain airport road is taken as an example, the project purchase comprises 3 slurry pumps (two-purpose one-standby) of DN350, and the slurry pumps are used for pumping and discharging sewage to the downstream after plugging a sewage well. And 2 DN200 water pumps are used for pumping and draining water in the pipes in the water collecting pit. A generator is reserved, 10 meters of DN350 water pipes, 40 meters of DN200 water pipes, 120 meters of DN400 multiplied by 12 seamless steel pipes, 16 meters of DN1500 reinforced concrete pipes, 68 meters of 56b I-beams and 29.6 meters of 32b I-beams are used as a supporting system of the water pumping pipe network. Two PC120 excavators, one truck crane and two 3cm thick steel boxes (3 meters wide multiplied by 4 meters long multiplied by 2 meters high) are used for pumping water to the downstream to prevent flushing water from directly scouring the original well wall buffer. A plurality of water stop rubber strips and the like. The utility model relates to a material specification quantity only is experience value or common value when engineering application, refers to the suggestion value promptly. The specific implementation should be in practice.

S2 water pumping is carried out on the water pumping pipe network

Arrange according to the water pumping pipe network, should excavate the sump pit at the culvert pipe upstream end department that needs to be changed, consider some project peripheral geology special, the pit bottom periphery has groundwater to invade the sump pit, so need set up the stagnant water steel sheet to the sump pit periphery, and before the installation stagnant water steel sheet, will debug the position of slush pump installation and the trend of pumping pipe way. The purpose of this is to facilitate the installation of the water stop steel plate and to optimize the installation position of the pumping pipe.

Taking the xiangjiang overpass project in a certain city as an example: three DN350 slurry pumps are arranged in the sewage well on the north side for pumping water, the power of each slurry pump is 50KW, and the water displacement per hour is about 1100m³The water pumping amount of the two water pumps per hour is 2200m³. The conversion of the flow speed of the inverted siphon of the existing sewage pipeline in the project meets the use requirement of normal drainage.

As sewage needs to be pumped and drained to the downstream, a water pumping pipeline needs to cross a downward through channel, and a water pumping pipeline network needs to be designed by technical departments of companies, the project design adopts 3 channels of 6 double-spliced 56b I-shaped steel which is erected on the downward through channel and is used as a drainage pipe support frame, three phi 800 steel piles are arranged on each side of the end part of the I-shaped steel support frame, and C25 concrete is poured in the I-shaped steel support frame. 6 channels of 32b I-steel are arranged at the upper part of the I-steel and are connected into a whole, and 32b I-steel inclined struts are arranged at the end parts of the I-steel. And two top DN400 steel water pumping pipes are arranged, one is arranged to the first lower sewage well at the downstream, and the other is arranged to the second lower sewage well 300, so as to prevent the over-high water return pressure.

S3 culvert pipe mouth for blocking sewage well by laying bricks underwater

And (4) adopting an underwater brick laying method to plug a sewage pipe opening of the culvert pipe to be replaced by hiring a professional diver, so as to prevent sewage from flowing into the pipeline to be replaced. The operator should have professional diving qualification certificate and be trained by related anti-seepage treatment and brick laying related knowledge operation, and generally speaking, the professional diver who engages in the project is the professional who works underwater in the area. When a diver lays a brick in the water, the water pumping equipment is closed for safety, and the used mortar is special waterproof mortar for laying the brick in the water.

S4, excavating earthwork of sewage pipeline

After the divers plug the two ends of the culvert pipe, the underpass channel is drained by water in the leaking buried culvert pipe, the original pipeline earthwork can be excavated, a water collection pit with the length of 1.5 meters, the width of 1.5 meters and the depth of 1 meter is arranged in the middle of the three meters of the side edge of the sewage pipeline before the earthwork is excavated, and a drainage ditch is excavated. A water pump with DN200 caliber is arranged in the water collecting pit to discharge the leakage water of the original pipeline. The original pipeline is observed to see whether sewage seeps out and the water seepage amount is large or small. And when the water drainage speed is higher than the water leakage speed, the formal excavation can be carried out. When the drainage speed is less than the water leakage speed, secondary plugging and reinforcement are required to be carried out on the sewage well pipe orifice plugged in the past by using a sand bag until the drainage can be guaranteed.

The earth excavation is carried out by adopting a PCl20 backhoe excavator. And excavating along the flowing direction of the culvert pipe at the position 1 meter away from the gravity type retaining wall horizontally. The rest 1 m of earthwork is excavated manually, so that the influence on the bottom soil body of the gravity retaining wall is avoided.

The earthwork excavation is carried out in two stages, firstly, the earthwork is naturally excavated to the top of the original pipeline according to the slope coefficient of 1: 0.5, when the water seepage quantity of the original pipeline is less than 2 cubic meters per minute, the original pipeline can be excavated, and the original pipeline is still excavated to the cushion surface of the previously constructed pipe culvert according to the slope coefficient of 1: 0.5. If the water displacement is greater than 2 cubic meters per minute, the plugging needs to be strengthened.

In the excavation process, a specially-assigned person needs to observe the displacement of the gravity retaining wall. And a water retaining dam is arranged at the position 6 meters away from the excavated pipe trench horizontally, so that a large amount of sewage is prevented from suddenly gushing in the pipeline breaking process, and loss is caused to equipment for excavating the east side working surface of the pipeline. The water retaining dam adopts the relatively dense soil excavated on site, the elevation of the top of the dam exceeds the water level line of the upstream sewage pipe by 1 meter, the lower opening of the section is 5 meters wide, and the upper opening is 1 meter wide.

S5, installing and replacing new culvert pipe

Before the trench is excavated, two water collecting pits are arranged on the east side of the trench, and water is drained in the trench in a pumping mode to ensure that no water is accumulated in the trench. And leveling the pipeline foundation according to the original pipeline foundation.

And (4) rechecking the elevation before pipe laying, measuring the central line of the pipe joint and the position of the pipeline, and placing a base plate for elevation.

The pipes are arranged from downstream to upstream in sequence, the sockets are arranged in the upstream direction, the sockets are arranged in the downstream direction, and a half-section short pipe is adopted at the interface of the well and the pipeline.

Before laying the pipe, the inner surface of the socket of the pipe joint and the outer surface of the socket are cleaned up by using a steel wire brush to remove oil stains and sundries, a corresponding rubber sealing ring is selected according to the pipe diameter specification and sleeved into the socket groove, the periphery is required to be uniform, smooth and free of distortion, and waterproof paint 851 is coated on the surface of the rubber sealing ring and the inner surface of the front-section pipe to prevent water seepage.

When the pipe is lowered, the lifting point is arranged at the gravity center of the pipe and lifted by a waist-blocking lifting mode or a special lifting appliance is adopted. The method of using steel cable to pass through pipe and hang pipe is forbidden, and the pipe joint interface is prevented from being damaged when the pipe is hung and hung.

During pipe laying, the pipe joints are stably hung down and translated to the joints of the pipes to adjust the elevation and the axis of the pipe joints, then the pipe tightening equipment is used for slowly inserting the sockets of the pipes into the sockets, the pipe joints still need to be hung in the process of inserting the pipes so as to reduce the tension during pipe tightening, and after the pipe joints are tightened, the axis and the elevation of the pipes are adjusted and then are compacted by pipe pillows. When the pipe joint is inserted, attention should be paid to the fact that the rubber ring does not twist or fall off the groove.

S6, encapsulation and sealing inspection of concrete pipeline

In order to prevent the joint from being damaged and leaked after the installation of a new pipeline is finished and the pipeline safety during the excavation construction of a underpass roadbed, 360-degree reinforced concrete encapsulation is required to be arranged on the pipeline. The reinforced concrete encapsulation is completed in three steps, the pipes at two ends are encapsulated firstly, and then the middle pipe is blocked.

And after 24 hours of plugging, a professional diver opens the plugging brick walls in the sewage wells on the north side and the south side to fill the pipelines with water, observes for 12 hours, and inspects the tightness of the pipelines. And if the joint of the gravity retaining wall and the pipeline has leakage, plugging the leakage part by adopting a pressure grouting mode, and then inspecting. The encapsulation adopts C40 reinforced concrete.

S7, adding high-pressure jet grouting pile stabilizing pipe walls arranged at two ends of pipeline

After the two pipelines are treated, 4 rows of high-pressure rotary spraying piles and 3 rows of high-pressure rotary spraying piles are constructed on the east side, the pile length is 7m, the distance is 40cm, the function is that the side wall of the protection pipe is too large so as not to be damaged, and the safe and reliable use of the inverted siphon double-pipe in municipal engineering after the vehicle is communicated is ensured.

8. Closing the pumping pipe network and checking the drainage

And closing the water pumping pipe network, checking whether the large-flow inverted siphon sewage discharge is smooth or not under the condition that water is not pumped, and if the discharge is smooth and effective for 48 hours and no leakage exists, proving that the water seepage is finished.

In the description of the present invention, it is to be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above embodiments are only specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, many variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.

Claims

1. The utility model provides a sewage pipeline's prevention of seepage hinders and oozes structure, includes sewer pit, first sewer pit, the sewer pit in the second, first sewer pit sets up go up sewer pit below, go up sewer pit and first sewer pit through wearing the pipeline intercommunication down, sewer pit and second sewer pit pass through sewer pipe intercommunication, its characterized in that under first sewer pit and the second: the sewage pipeline is a concrete encapsulated pipeline and comprises two steel pipe bodies arranged in parallel, and the outer walls of the steel pipe bodies are encapsulated in reinforced concrete after being wrapped with hoops; and a high-pressure rotary jet grouting pile is arranged above the sewage pipeline to protect the sewage pipeline, and is positioned at the joint of the sewage pipeline and the first lower sewage well and the second lower sewage well.

2. The seepage control and seepage prevention structure of the sewage pipeline of claim 1, wherein: and a concrete cushion layer is arranged between the concrete encapsulating pipeline and the supporting ground.

3. The seepage-proofing and seepage-resisting structure of the sewage pipeline of claim 2, wherein: the quantity of high pressure jet grouting pile is a plurality of side by side, high pressure jet grouting pile interval sets up, and the interval of adjacent high pressure jet grouting pile is 40 cm.