CN111779110A - 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 as follows: the sewage conveying pipeline inspection well comprises a plastic shaft and a reinforced concrete shaft, wherein the lower end of the plastic shaft is used for being connected with a sewage conveying pipe, and the other end of the plastic shaft is inserted into the lower end of the reinforced concrete shaft. The plastic well cylinder has thin wall, does not need to excavate corresponding pouring space, can greatly reduce civil engineering excavation amount, and also avoids cast-in-place civil engineering work under the condition of underground water, thereby reducing construction difficulty, shortening construction period and saving construction cost; meanwhile, the upper end of the plastic shaft is inserted into the lower end of the reinforced concrete shaft, so that the sufficient load capacity of the ground or a traffic lane can be ensured, the plastic shaft can adapt to field construction errors and ground fluctuation, the change of road elevation can be met, and secondary processing and adjustment of the plastic shaft are not needed.

Description

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

The large-scale sewage conveying pipeline is a sewage conveying main pipe, so that the large-scale sewage conveying pipeline is buried deeply (5-10 m) and is generally positioned below an underground water level, and a conventional sewage inspection shaft has the advantages of long construction period, high engineering cost, high construction drainage workload, high foundation pit (deep foundation pit) excavation and support workload and high construction difficulty for a cast-in-place reinforced concrete structure.

Although the excavation amount of a foundation pit can be reduced by the plastic inspection shaft, the height of the plastic shaft (pipe) needs to be accurately designed, particularly for the inspection shaft under a roadway, if the position of the installation inspection shaft is adjusted or the road elevation is adjusted, the height difference is larger than or equal to 50mm from the original design height difference, the shaft is correspondingly inspected and the changed road ground elevation is difficult to adapt, so that the problem of field installation is caused; unless enough margin is reserved at the height of the shaft in advance and shaft cutting is carried out on site, the cutting is difficult and long in construction period on site of a large shaft, and the problem of material waste exists.

Disclosure of Invention

Aiming at the technical problems of long construction period and high construction difficulty of the existing large-pipe-diameter sewage conveying pipeline inspection shaft, the invention provides the sewage conveying pipeline inspection shaft and the construction method, which can reduce the workload of inspecting shaft foundation pit excavation support and adapt to roads with different standards, and have the characteristics of small construction amount, short construction period, low construction difficulty and good adaptability.

The invention is realized by the following technical scheme:

the sewage conveying pipeline inspection well comprises a plastic shaft and a reinforced concrete shaft, wherein the lower end of the plastic shaft is used for being connected with a sewage conveying pipe, and the other end of the plastic shaft is inserted into the lower end of the reinforced concrete shaft.

According to the invention, the inspection well is formed by connecting the plastic shaft and the reinforced concrete shaft, and the plastic shaft is used for connecting the sewage conveying pipe, compared with the integral reinforced concrete well, the wall of the plastic shaft is thin, and the corresponding pouring space is not required to be dug, so that the civil engineering excavation amount can be greatly reduced, and the cast-in-situ civil engineering work under the condition of underground water is also avoided, thereby reducing the construction difficulty, shortening the construction period and saving the construction cost.

The upper end of the plastic shaft is inserted into the reinforced concrete shaft and is connected with the ground or a traffic lane through the reinforced concrete shaft, so that the ground or the traffic lane can have enough load capacity, the plastic shaft is prevented from being damaged by ground load, and the inspection well is convenient to install. Meanwhile, the length of the upper end of the plastic shaft inserted into the lower end of the reinforced concrete shaft is adjusted, so that the plastic shaft can adapt to field construction errors and ground fluctuation, the change of road elevation can be met, and secondary processing and adjustment of the plastic shaft are not needed.

Furthermore, the sewage treatment device also comprises a three-way joint which is used for connecting the plastic shaft and the sewage delivery pipe so as to connect the plastic shaft and the sewage delivery pipe.

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

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

Furthermore, both ends all are equipped with connecting sleeve about three way connection, connecting sleeve is used for connecting sewage conveyer pipe to three way connection and sewage conveyer pipe's be connected.

As a specific implementation mode of connecting the plastic shaft and the three-way joint, the lower end of the plastic shaft is bonded with the upper end of the three-way joint.

Preferably, the reinforced concrete shaft is a prefabricated reinforced concrete shaft, and the construction period of the inspection well is further shortened.

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

Furthermore, crawling ladders are arranged in the plastic shaft and the reinforced concrete shaft, so that the maintenance is facilitated.

Preferably, the tee joint and the plastic shaft are made of glass fiber reinforced plastics, so that the tee joint and the plastic shaft have sufficient structural strength and rigidity.

The invention also provides a construction method of the inspection well of the sewage conveying pipeline, which comprises the following steps:

determining the building position of the inspection well according to the layout path of the sewage conveying pipe;

a sewage pipe positioned at the construction position of the inspection well is connected through a three-way joint;

drilling a hole from the pavement of the construction position of the inspection well to the position above the tee joint according to the outer diameter of the plastic shaft to obtain a plastic shaft hole;

reaming the upper end of the plastic well casing hole to obtain a reinforced concrete well casing hole;

connecting the lower end of the plastic shaft with the upper end connector of the three-way connector;

determining the length of the reinforced shaft sleeved outside the plastic shaft according to the height of the ground, and then sleeving the lower end of the reinforced shaft at the upper end of the plastic shaft;

cover the manhole cover, finish the building of the manhole and establish

The invention has the beneficial effects that:

1. according to the invention, the inspection well is formed by connecting the plastic shaft and the reinforced concrete shaft, and the plastic shaft is used for connecting the sewage conveying pipe, compared with the integral reinforced concrete well, the wall of the plastic shaft is thin, and the corresponding pouring space is not required to be dug, so that the civil engineering excavation amount can be greatly reduced, and the cast-in-situ civil engineering work under the condition of underground water is also avoided, thereby reducing the construction difficulty, shortening the construction period and saving the construction cost.

2. The upper end of the plastic shaft is inserted into the reinforced concrete shaft to be connected with the ground or the traffic lane through the reinforced concrete shaft, so that the ground or the traffic lane can have enough load capacity, the plastic shaft is prevented from being damaged by ground load, and the inspection well is convenient to install.

3. By adjusting the length of the upper end of the plastic shaft inserted in the lower end of the reinforced concrete shaft, the device can adapt to field construction errors and ground fluctuation, can meet the change of road elevation, and does not need to perform secondary processing and adjustment on the plastic shaft.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic view of the plane A-A of FIG. 1;

FIG. 3 is a schematic view of the plane B-B of FIG. 1;

fig. 4 is an enlarged view of a portion C of fig. 3.

Reference numbers and corresponding part names in the drawings:

1-plastic shaft, 2-reinforced concrete shaft, 3-sewage conveying pipe, 4-three-way joint, 5-connecting sleeve, 6-ladder stand, 7-foam plate, 8-sealing paste, 9-roadway and 10-well cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Examples

A3-channel inspection well for a sewage conveying pipe comprises a plastic shaft 1, a reinforced concrete shaft 2 and a three-way joint 4, wherein the three-way joint 4 and the plastic shaft 1 are made of glass fiber reinforced plastics so as to ensure that the three-way joint 4 and the plastic shaft 1 have sufficient structural strength and rigidity; of course, the plastic well 1 and the tee 4 can be made of other plastics, such as HDPE. The lower end of the plastic shaft 1 is used for connecting a sewage conveying pipe 3, and the other end of the plastic shaft 1 is inserted into the lower end of the reinforced concrete shaft 2. The three-way joint 4 is used for connecting the plastic shaft 1 and the sewage conveying pipe 3 so as to connect the plastic shaft 1 and the sewage conveying pipe 3.

Preferably, the length of the plastic shaft 1 inserted in the reinforced concrete shaft 2 is more than 55mm, so that the height of the inspection well has an adjustment allowance of more than 50 mm. And a foam plate 7 and sealing paste 8 are arranged between the outer wall of the plastic shaft 1 and the inside of the reinforced concrete shaft 2, so that sewage inside the inspection well is not communicated with the outside. The reinforced concrete shaft 2 is prefabricated reinforced concrete, and the construction period of the inspection well is further shortened.

Further, both ends all are equipped with connecting sleeve 5 about three way connection 4, connecting sleeve 5 is used for connecting sewage conveyer pipe 3 to three way connection 4 and sewage conveyer pipe 3's be connected. And crawling ladders 6 are arranged in the plastic shaft 1 and the reinforced concrete shaft 2 so as to be convenient for maintenance.

As a specific embodiment of the connection between the plastic shaft 1 and the three-way joint 4, the lower end of the plastic shaft 1 is bonded with the upper end of the three-way joint 4, so that the construction period is shortened while the sealing performance of the connection part between the three-way joint 4 and the plastic shaft 1 is ensured.

The construction method comprises the following steps:

determining the building position of the inspection well according to the layout path of the sewage conveying pipe 3;

a sewage pipe 3 positioned at the construction position of the inspection well is connected through a three-way joint 4;

drilling a hole from the pavement of the construction position of the inspection well to the position above the tee joint 4 according to the outer diameter of the plastic shaft 1 to obtain a plastic shaft hole;

reaming the upper end of the plastic well casing hole to obtain a reinforced concrete well casing hole;

connecting the lower end of the plastic shaft 1 with the upper end joint of the three-way joint 4;

determining the length of the reinforced shaft 2 sleeved outside the plastic shaft 1 according to the height of the ground, and then sleeving the lower end of the reinforced shaft 2 at the upper end of the plastic shaft 1;

and covering the inspection well cover to complete the construction of the inspection well.

According to the invention, the plastic shaft 1 and the reinforced concrete shaft 2 are connected to form the inspection well, and the plastic shaft 1 is used for connecting the sewage conveying pipe 3, compared with the integral reinforced concrete well, the wall of the plastic shaft 1 is thin, and the corresponding pouring space is not required to be dug, so that the civil engineering excavation amount can be greatly reduced, and the cast-in-place civil engineering work under the condition of underground water is also avoided, thereby reducing the construction difficulty, shortening the construction period and saving the construction cost.

The upper end of the plastic shaft 1 is inserted into the reinforced concrete shaft 2 to be connected with the ground or a traffic lane through the reinforced concrete shaft 2, so that the ground or the traffic lane can have enough load capacity, the plastic shaft 1 is prevented from being damaged by ground load, and an inspection well is convenient to install. Meanwhile, the length of the upper end of the plastic shaft 1 inserted into the lower end of the reinforced concrete shaft 2 is adjusted, so that the plastic shaft can adapt to field construction errors and ground fluctuation, the change of road elevation can be met, and secondary processing and adjustment of the plastic shaft 1 are not needed.

Taking a sewage delivery pipe 3 with the diameter of 2200mm and the laying depth of 6.5m as an example, the diameters of two ends of the three-way joint are 2200mm, the diameter of the plastic shaft 1 is 1200mm, and the excavated earth volume is about 47.2m³The backfilling amount is about 27.3m3, and when the cast-in-situ inspection well of reinforced concrete is adopted, the size of the inspection well is 4.1m × 3.5.5 m × 3.4m, and the excavated volume of earth is about 165.24m³The backfilling work amount is about 98.8m³. Therefore, the excavation backfill amount required by the traditional reinforced concrete inspection well is about 3.5 times of that of the embodiment, so that the construction excavation backfill amount can be greatly reduced, the construction period can be shortened, and the construction investment cost can be reduced.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a sewage conveying pipeline inspection shaft, includes plastic shaft (1), its characterized in that still includes reinforced concrete shaft (2), plastic shaft (1) lower extreme is used for connecting sewage conveying pipe (3), the other end of plastic shaft (1) is inserted and is established in reinforced concrete shaft (2) lower extreme.

2. The sewage conveying pipeline inspection shaft according to claim 1, further comprising a tee joint (4), wherein the tee joint (4) is used for connecting the plastic shaft (1) and the sewage conveying pipe (3).

3. The sewage delivery pipe manhole according to claim 1, wherein the length of the plastic shaft (1) inserted in the reinforced concrete shaft (2) is greater than 55 mm.

4. The sewage delivery pipe inspection shaft according to claim 1, wherein a foam plate (7) and a sealing paste (8) are arranged between the outer wall of the plastic shaft (1) and the inside of the reinforced concrete shaft (2).

5. The sewage conveying pipeline inspection shaft according to claim 2, wherein the left end and the right end of the three-way joint (4) are provided with connecting sleeves (5), and the connecting sleeves (5) are used for connecting the sewage conveying pipeline (3).

6. The sewage delivery pipe inspection shaft according to claim 2, wherein the lower end of the plastic shaft (1) is bonded with the upper end of the tee joint (4).

7. The sewage delivery pipe inspection shaft of claim 1, wherein the reinforced concrete shaft (2) is a prefabricated reinforced concrete shaft.

8. The sewage delivery pipeline inspection shaft according to claim 1, wherein a ladder (6) is arranged in each of the plastic shaft (1) and the reinforced concrete shaft (2).

9. The sewage conveying pipeline inspection shaft according to claim 2, wherein the tee joint (4) and the plastic shaft (1) are made of glass fiber reinforced plastics.

10. A method for building a sewage conveying pipeline inspection well is characterized by comprising the following steps:

determining the building position of the inspection well according to the layout path of the sewage conveying pipe (3);

a sewage pipe (3) positioned at the construction position of the inspection well is connected through a three-way joint (4);

drilling a hole from the pavement of the construction position of the inspection well to the position above the tee joint (4) according to the outer diameter of the plastic shaft (1) to obtain a plastic shaft hole;

reaming the upper end of the plastic well casing hole to obtain a reinforced concrete well casing hole;

connecting the lower end of the plastic shaft (1) with the upper end joint of the three-way joint (4);

determining the length of the reinforced shaft (2) sleeved outside the plastic shaft (1) according to the height of the ground, and then sleeving the lower end of the reinforced shaft (2) at the upper end of the plastic shaft (1);

and covering the inspection well cover to complete the construction of the inspection well.

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