CN111779110A - A kind of sewage conveying pipeline inspection well and construction method - Google Patents

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage conveying pipeline inspection well and a construction method; the adopted technical scheme is: a sewage conveying pipeline inspection well, comprising a plastic wellbore and a reinforced concrete wellbore, wherein the lower end of the plastic wellbore is For connecting the sewage conveying pipe, the other end of the plastic wellbore is inserted into the lower end of the reinforced concrete wellbore. The plastic wellbore of the invention has thin walls and does not need to excavate the corresponding pouring space, which can greatly reduce the amount of civil construction excavation, and avoid the cast-in-place civil construction work under the condition of groundwater, thereby reducing the construction difficulty, shortening the construction period and safety. The construction cost is saved; at the same time, the upper end of the plastic shaft is inserted inside the lower end of the reinforced concrete shaft, which can ensure that the ground or the roadway has sufficient load capacity, can adapt to on-site construction errors and ground undulations, and can also meet changes in road elevation without the need for Secondary processing and adjustment of plastic wellbore.

Description

A kind of sewage conveying pipeline inspection well and construction method

technical field

The invention relates to the technical field of sewage treatment, in particular to a sewage conveying pipeline inspection well and a construction method.

Background technique

Large sewage pipelines are buried deep (5-10m) because they are the main pipelines of sewage transportation, and are generally located below the groundwater level, while conventional sewage inspection wells are cast-in-place reinforced concrete structures with long construction periods, high engineering costs, and low construction costs. The workload of drainage is large, the excavation and support of the foundation pit (deep foundation pit) is heavy, and the construction is difficult.

Although the appearance of plastic inspection wellbore can reduce the excavation of the foundation pit, the height of the plastic wellbore (pipe) needs to be accurately designed, especially for the inspection wellbore under the roadway, if the position of the inspection wellbore is adjusted, or the road elevation If the height difference from the original design is ≥50mm, the wellbore will be checked accordingly and it will be difficult to adapt to the changed road surface elevation, which will lead to problems in the on-site installation; However, it is difficult to implement on-site cutting in large wellbore, the construction period is long, and there is a problem of material waste.

SUMMARY OF THE INVENTION

In view of the above-mentioned technical problems of long construction period and difficult construction of the existing large-diameter sewage conveying pipeline inspection wellbore, the present invention provides a sewage conveying pipeline inspection well and a construction method, which can reduce the time required for excavation and support of the inspection wellbore foundation pit. The workload and road adaptation to different elevations have the characteristics of small construction amount, short construction period, low construction difficulty and good adaptability.

The present invention is achieved through the following technical solutions:

An inspection well for sewage conveying pipelines includes a plastic wellbore and a reinforced concrete wellbore, the lower end of the plastic wellbore is used for connecting a sewage conveying pipe, and the other end of the plastic wellbore is inserted into the lower end of the reinforced concrete wellbore.

In the present invention, an inspection well is formed by connecting a plastic wellbore and a reinforced concrete wellbore, and the plastic wellbore is used to connect the sewage conveying pipe. Compared with the direct use of the integral reinforced concrete well, the plastic wellbore has a thin wall and does not need to excavate the corresponding pouring space, and can greatly The amount of civil excavation is reduced, and the cast-in-place civil work under groundwater conditions is also avoided, thereby reducing the construction difficulty, shortening the construction period and saving the construction cost.

The upper end of the plastic wellbore is inserted in the reinforced concrete wellbore to connect with the ground or the roadway through the reinforced concrete wellbore, which can ensure that the ground or roadway has sufficient load capacity, avoid the damage of the ground load to the plastic wellbore, and facilitate installation and inspection well. At the same time, by adjusting the length of the upper end of the plastic wellbore inserted inside the lower end of the reinforced concrete wellbore, it can adapt to on-site construction errors and ground undulations, and can also meet changes in road elevation, without the need for secondary processing and adjustment of the plastic wellbore.

Further, a three-way joint is also included, and the three-way joint is used to connect the plastic wellbore and the sewage conveying pipe, so as to connect the plastic wellbore and the sewage conveying pipe.

Preferably, the length of the plastic wellbore inserted in the reinforced concrete wellbore is greater than 55mm, so that the height of the inspection well has an adjustment margin of more than 50mm.

Further, a foam board and a sealing paste are arranged between the outer wall of the plastic wellbore and the interior of the reinforced concrete wellbore, so that the sewage inside the inspection well is not communicated with the outside world.

Further, the left and right ends of the three-way joint are provided with connecting sleeves, and the connecting sleeves are used to connect the sewage conveying pipe, so as to facilitate the connection between the three-way joint and the sewage conveying pipe.

As a specific embodiment of the connection between the plastic wellbore and the tee joint, the lower end of the plastic wellbore is bonded to the upper end of the tee joint.

Preferably, the reinforced concrete wellbore is a prefabricated reinforced concrete wellbore, which further shortens the construction period of the inspection well.

Preferably, the diameter of the plastic wellbore is 1200mm.

Further, both the plastic wellbore and the reinforced concrete wellbore are provided with ladders to facilitate maintenance.

Preferably, the three-way joint and the plastic wellbore are made of glass fiber reinforced plastic to ensure that the three-way joint and the plastic wellbore have sufficient structural strength and rigidity.

The present invention also provides a method for constructing inspection wells for sewage conveying pipelines, comprising the following steps:

Determine the construction position of the inspection well according to the route of the sewage conveying pipe;

Connect the sewage pipe at the construction site of the inspection well through the tee joint;

According to the outer diameter of the plastic wellbore, drill the road surface from the construction position of the inspection well to the top of the tee joint to obtain the plastic wellbore hole;

Reaming the upper end of the plastic wellbore to obtain a reinforced concrete wellbore;

Connect the lower end of the plastic wellbore with the upper end joint of the tee joint;

According to the height of the ground, determine the length of the reinforced wellbore sleeved outside the plastic wellbore, and then sleeve the lower end of the reinforced wellbore on the upper end of the plastic wellbore;

Cover the inspection well cover and complete the construction of the inspection well

Beneficial effects of the present invention:

1. The present invention forms an inspection well by connecting the plastic wellbore and the reinforced concrete wellbore, and the plastic wellbore is used to connect the sewage conveying pipe. Compared with the direct use of the integral reinforced concrete well, the plastic wellbore has a thin wall and does not need to excavate the corresponding pouring space, The amount of civil excavation can be greatly reduced, and the cast-in-place civil construction work in the case of groundwater is avoided, thereby reducing the construction difficulty, shortening the construction period and saving the construction cost.

2. The upper end of the plastic wellbore is inserted into the reinforced concrete wellbore to connect with the ground or the roadway through the reinforced concrete wellbore, which can ensure that the ground or roadway has sufficient load capacity, avoid the damage of the ground load to the plastic wellbore, and is easy to install Inspection well.

3. By adjusting the length of the upper end of the plastic wellbore inserted inside the lower end of the reinforced concrete wellbore, it can adapt to on-site construction errors and ground undulations, as well as changes in road elevation, without the need for secondary processing and adjustment of the plastic wellbore.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the embodiments of the present invention, and constitute a part of the present application, and do not constitute limitations to the embodiments of the present invention. In the attached image:

Fig. 1 is the top view structure schematic diagram of the present invention;

Fig. 2 is the A-A plane schematic diagram of Fig. 1;

Fig. 3 is the B-B side schematic diagram of Fig. 1;

FIG. 4 is an enlarged view of part C of FIG. 3 .

The marks in the attached drawings and the corresponding parts names:

1-Plastic wellbore, 2-Reinforced concrete wellbore, 3-Sewage conveying pipe, 4-Tee joint, 5-Connecting sleeve, 6-Climbing ladder, 7-Foam board, 8-Sealing paste, 9-Walkway, 10 - Manhole cover.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. as a limitation of the present invention.

Example

A sewage conveying pipe with 3 inspection wells, including a plastic well 1, a reinforced concrete well 2 and a tee joint 4, the tee joint 4 and the plastic well 1 are made of glass fiber reinforced plastic to ensure that the tee joint 4 and the plastic wellbore 1 has sufficient structural strength and rigidity; of course, the plastic wellbore 1 and the tee joint 4 are also made of other plastics, such as HDPE. The lower end of the plastic wellbore 1 is used to connect the sewage conveying pipe 3 , and the other end of the plastic wellbore 1 is inserted into the lower end of the reinforced concrete wellbore 2 . The three-way joint 4 is used to connect the plastic wellbore 1 and the sewage conveying pipe 3 so as to connect the plastic wellbore 1 and the sewage conveying pipe 3 .

Preferably, the length of the plastic well 1 inserted in the reinforced concrete well 2 is greater than 55 mm, so that the height of the inspection well has an adjustment margin of more than 50 mm. A foam board 7 and a sealing paste 8 are arranged between the outer wall of the plastic wellbore 1 and the interior of the reinforced concrete wellbore 2, so that the sewage inside the inspection well is not communicated with the outside world. The reinforced concrete shaft 2 is prefabricated reinforced concrete, which further shortens the construction period of the inspection well.

Further, the left and right ends of the three-way joint 4 are provided with connecting sleeves 5 , and the connecting sleeves 5 are used to connect the sewage conveying pipe 3 to facilitate the connection of the three-way joint 4 and the sewage conveying pipe 3 . Both the plastic wellbore 1 and the reinforced concrete wellbore 2 are provided with ladders 6 for easy maintenance.

As a specific embodiment of the connection between the plastic wellbore 1 and the tee joint 4 , the lower end of the plastic wellbore 1 is bonded to the upper end of the tee joint 4 , which shortens the construction period while ensuring the tightness of the connection between the tee joint 4 and the plastic wellbore 1 .

Construction method of the present invention:

According to the layout path of the sewage conveying pipe 3, determine the construction position of the inspection well;

Connect the sewage pipe 3 at the construction position of the inspection well through the tee joint 4;

According to the outer diameter of the plastic wellbore 1, drill the road surface from the construction position of the inspection well to the top of the tee joint 4 to obtain the plastic wellbore hole;

Reaming the upper end of the plastic wellbore to obtain a reinforced concrete wellbore;

Connect the lower end of the plastic wellbore 1 with the upper end joint of the tee joint 4;

According to the height of the ground, determine the length of the reinforced wellbore 2 set outside the plastic wellbore 1, and then sleeve the lower end of the reinforced wellbore 2 on the upper end of the plastic wellbore 1;

Cover the manhole cover to complete the construction of the manhole.

In the present invention, an inspection well is formed by connecting the plastic wellbore 1 and the reinforced concrete wellbore 2, and the plastic wellbore 1 is used to connect the sewage conveying pipe 3. Compared with the direct use of the integral reinforced concrete well, the plastic wellbore 1 has a thin wall and does not need to excavate the corresponding The pouring space can greatly reduce the amount of civil engineering excavation, and also avoid the cast-in-place civil engineering work in the case of groundwater, thereby reducing the construction difficulty, shortening the construction period and saving the construction cost.

The upper end of the plastic wellbore 1 is inserted into the reinforced concrete wellbore 2 to connect with the ground or the roadway through the reinforced concrete wellbore 2, which can ensure that the ground or the roadway has sufficient load capacity and avoid the ground load damage to the plastic wellbore 1. And easy to install inspection wells. At the same time, by adjusting the length of the upper end of the plastic wellbore 1 inserted inside the lower end of the reinforced concrete wellbore 2, it can adapt to on-site construction errors and ground undulations, and can also meet changes in road elevation, without the need for secondary processing and adjustment of the plastic wellbore 1.

Taking a sewage conveying pipe 3 with a diameter of 2200mm and a laying depth of 6.5m as an example, the diameter of the two ends of the tee joint is 2200mm, the diameter of the plastic shaft 1 is 1200mm, and the amount of earthwork excavated is about 47.2m ³ (steel sheet pile support). ), the amount of backfilling is about 27.3m3; when the corresponding cast-in-place inspection well of reinforced concrete is used, the size of the inspection well is 4.1m×3.5m×3.4m, and the excavated earthwork volume is about ^165.24m3 (steel sheet pile support ), the backfill project volume is about 98.8m ³ . Therefore, the amount of excavation and backfilling required for the traditional reinforced concrete inspection well is about 3.5 times that of this embodiment. It can be seen that the use of this example can greatly reduce the amount of excavation and backfilling, shorten the construction period, and thus reduce the engineering investment cost.

The specific embodiments described above further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A sewage pipeline inspection well, comprising a plastic wellbore (1), characterized in that it also comprises a reinforced concrete wellbore (2), and the lower end of the plastic wellbore (1) is used to connect a sewage pipeline (3), and the The other end of the plastic wellbore (1) is inserted into the lower end of the reinforced concrete wellbore (2). 2. The inspection well for sewage conveying pipelines according to claim 1, characterized in that it further comprises a tee joint (4), which is used to connect the plastic wellbore (1) and the sewage conveying pipe (3) ). 3. The sewage conveying pipeline inspection well according to claim 1, wherein the length of the plastic wellbore (1) inserted in the reinforced concrete wellbore (2) is greater than 55 mm. 4. The sewage pipeline inspection well according to claim 1, wherein a foam board (7) and a sealing paste (8) are provided between the outer wall of the plastic wellbore (1) and the interior of the reinforced concrete wellbore (2). . 5. The sewage pipeline inspection well according to claim 2, wherein the left and right ends of the three-way joint (4) are provided with connecting sleeves (5), and the connecting sleeves (5) are used for To connect the sewage conveying pipe (3). 6. The sewage conveying pipeline inspection well according to claim 2, wherein the lower end of the plastic wellbore (1) is bonded to the upper end of the tee joint (4). 7. The sewage pipeline inspection well according to claim 1, wherein the reinforced concrete wellbore (2) is a prefabricated reinforced concrete wellbore. 8. The sewage pipeline inspection well according to claim 1, characterized in that, both the plastic wellbore (1) and the reinforced concrete wellbore (2) are provided with ladders (6). 9 . The inspection well for sewage conveying pipelines according to claim 2 , wherein the tee joint ( 4 ) and the plastic wellbore ( 1 ) are made of glass fiber reinforced plastic. 10 . 10. A method for constructing inspection wells for sewage conveying pipelines, characterized in that, comprising the following steps: According to the layout path of the sewage conveying pipe (3), determine the construction position of the inspection well; Connect the sewage pipe (3) at the construction position of the inspection well through the tee joint (4); According to the outer diameter of the plastic wellbore (1), drill the road surface from the construction position of the inspection well to the top of the tee joint (4) to obtain the plastic wellbore hole; Reaming the upper end of the plastic wellbore to obtain a reinforced concrete wellbore; Connect the lower end of the plastic wellbore (1) with the upper end joint of the tee joint (4); According to the height of the ground, determine the length of the reinforced wellbore (2) sleeved outside the plastic wellbore (1), and then sleeve the lower end of the reinforced wellbore (2) on the upper end of the plastic wellbore (1); Cover the manhole cover to complete the construction of the manhole.

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