CN114382158A

CN114382158A - Construction method of ventilation well

Info

Publication number: CN114382158A
Application number: CN202111651835.XA
Authority: CN
Inventors: 赵琛; 姜小强; 范晓翔; 赵培; 夏建坤
Original assignee: Shanghai Mechanized Construction Group Co Ltd
Current assignee: Shanghai Mechanized Construction Group Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-22
Anticipated expiration: 2041-12-30
Also published as: CN114382158B

Abstract

The invention belongs to the technical field of municipal pipeline engineering construction, and discloses a construction method of a ventilation well, which comprises the following steps: drilling holes in a reinforced soil body embedded with a sewage pipeline; inserting a steel protective pipe into the hole; injecting a sealing material between the steel protective pipe and the hole wall of the hole, and forming a sealing barrier by the reinforced soil body and the steel protective pipe through the sealing material; arranging a jacking device and a steel prefabricated jacking pipe joint in the sewage pipeline; the jacking device drives the steel prefabricated jacking pipe joint to penetrate through the side wall of the sewage pipeline and extend into the steel protective pipe; putting the steel pipe sections into the steel protective pipes; filling materials are injected between the steel pipe joint and the steel protective pipe; drawing the steel protective pipe out of the hole; and filling materials are injected between the steel pipe joints and the hole walls of the holes. By adopting the method for construction, adverse effects caused by foundation pit construction in cities are avoided, the whole construction method is simple in equipment, low in construction difficulty and risk, clear in steps and high in economy.

Description

Construction method of ventilation well

Technical Field

The invention relates to the technical field of municipal pipeline engineering construction, in particular to a construction method of a ventilation well.

Background

In the urban sewage pressure conveying pipeline, a certain amount of gas can be generated in sewage to influence the flow of fluid in the pipeline, and the pressure in the pipeline is rapidly increased in serious conditions, so that the sewage pipeline is broken.

Exhaust devices such as gas permeable wells are often installed in sewage pipelines to prevent damage to the piping system by these gases. The general construction method is as follows: and (4) opening a hole at the top of the sewage pipeline, installing a ventilation well, and leading the gas in the pipeline to the ground through the ventilation well. For the main sewage pipe with deeper burial depth, namely the main sewage pipe with the burial depth of more than or equal to 5.0 meters and the inner diameter of more than or equal to 3.5 meters, the main construction method of the ventilation well comprises the following steps: firstly, excavating a foundation pit at a well position, then pouring a lower overflowing box body and an upper ventilating well structure, then connecting the lower overflowing box body with sewage pipelines of two-side underground excavation construction, and finally backfilling and recovering the ground.

The main disadvantages of the above method are: firstly, when the pipeline is buried deeply, great difficulty and risk exist when deep foundation pit construction is needed; secondly, the foundation pit construction has great influence on the surrounding environment, and the phenomena of road occupation blocking and traffic obstruction caused by excavation of the foundation pit in urban construction are avoided; thirdly, the deep buried pipeline is generally constructed by adopting underground excavation equipment, when the connection process of the lower overflowing box body and the sewage pipelines at two sides is carried out, the processes of receiving and starting the equipment need to be added, and the construction difficulty and risk are greatly increased; finally, the construction method has the advantages of long construction period, high construction cost and unsatisfactory economic benefit.

Therefore, a method for constructing a gas permeable well is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a construction method of a ventilation well, which eliminates adverse effects caused by foundation pit construction and obviously reduces construction difficulty.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method of vent well construction comprising:

drilling holes in a reinforced soil body embedded with a sewage pipeline;

inserting a steel protective pipe into the hole;

injecting a sealing material between the steel protective pipe and the hole wall of the hole, and forming a sealing barrier by the reinforced soil body and the steel protective pipe through the sealing material;

arranging a jacking device and a steel prefabricated jacking pipe joint in the sewage pipeline;

the jacking device drives the steel prefabricated jacking pipe joint to penetrate through the side wall of the sewage pipeline and extend into the steel protective pipe;

putting the steel pipe sections into the steel protective pipes;

filling materials are injected between the steel pipe joint and the steel protective pipe;

drawing the steel protective pipe out of the hole;

and filling materials are injected between the steel pipe joints and the hole walls of the holes.

Optionally, the holes and the sewage pipeline are arranged at intervals, and a reinforced structure is arranged to hermetically connect the steel prefabricated jacking pipe joint and the sewage pipeline.

Optionally, the reinforcing structure comprises a reinforcing steel beam and a steel fixing plate, the reinforcing steel beam is fixedly connected to the sewage pipeline, and the steel fixing plate is fixedly connected to the reinforcing steel beam and the inner wall of the steel prefabricated jacking pipe joint.

Optionally, the steel casing is fixedly connected with a plurality of grouting pipes, the plurality of grouting pipes are fixedly connected with the steel casing at the same intervals along the circumferential direction, and the sealing material is injected between the steel casing and the hole wall of the hole through the grouting pipes.

Optionally, the slurry in the hole is pumped out after the sealing material forms the sealing barrier and before the jacking steel prefabricated jacking pipe section.

Optionally, when a plurality of steel pipe sections are provided:

putting a plurality of steel pipe sections into the steel protective pipe one by one;

and filling materials are injected between the steel pipe joint and the steel protective pipe layer by layer.

Optionally, filler is injected between each steel pipe section placed, i.e. between the steel pipe section and the steel casing.

Optionally, the outer wall of the steel pipe joint is fixedly connected with a guide plate, the guide plate comprises a fixing portion, one end of one steel pipe joint is clamped on the fixing portion of the other steel pipe joint, and one end of the prefabricated steel jacking pipe joint is clamped on the fixing portion of the steel pipe joint adjacent to the prefabricated steel jacking pipe joint.

Optionally, the guide plate further comprises a guide portion connected to the fixing portion, the guide portion gradually moving away from the outer pipe wall of the steel pipe section in a direction towards the sewage pipe.

Optionally, the pipe diameter of the steel prefabricated jacking pipe joint is consistent with that of the steel pipe joint.

The invention has the beneficial effects that:

preselecting the position of ventilative well and set up the hole on this position, set up the steel pillar in the hole, jacking device drive prefabricated jacking pipe joint of steel pass the lateral wall of sewage pipe, stretch into the steel pillar in, carry out the process of connecting of steel pipe joint and the intercommunication process of sewage pipe and steel pipe section in the steel pillar, the adverse effect that the foundation ditch construction brought in the city has been eliminated, whole construction method equipment is simple, the in-process need not increase processes such as the receipt of equipment and originated, the construction degree of difficulty and risk are lower, the step is clear and definite, economic nature is strong.

Drawings

FIG. 1 is a longitudinal cross-sectional view of an aperture and a sewer pipe according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an aperture and sewer pipe according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a fourth and fifth step in a gas permeable well installation process according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a steel casing according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a seventh step in a gas permeable well installation process provided by embodiments of the present invention;

FIG. 6 is a schematic diagram of an eighth, ninth, and tenth step of a gas permeable well installation process provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of the structure of FIG. 6, labeled A;

FIG. 8 is a schematic structural view of a plurality of steel pipe joint joints provided in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a steel pipe joint according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a thirteenth step of the gas permeable well installation process provided by the embodiment of the invention.

In the figure:

100. a sewage conduit; 110. a reinforcing structure; 111. reinforcing the steel beam; 112. a steel fixing plate;

200. reinforcing the soil body;

300. a hole; 310. a sealing material; 320. a filler;

400. a steel protective pipe; 410. a grouting pipe;

500. a jacking device;

600. a gas permeable well; 610. prefabricating a jacking pipe section by steel; 620. a steel pipe section; 621. a guide plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a construction method of a ventilation well, which comprises the following steps:

step one, positioning the open position of the ventilation well.

In this step, the position where the gas permeable well is opened is predetermined by accurate measurement, which facilitates the subsequent arrangement of the jacking device 500 and the steel prefabricated jacking pipe section 610 in the sewer pipe 100. And designing the ventilation well, and presetting and determining the outer diameter of the ventilation well.

And step two, reinforcing the reinforced soil body 200 around the sewage pipeline 100 at the positioning position of the ventilation well.

In the step, the reinforced soil body 200 in the range of 2-3 meters around the sewage pipeline 100 is reinforced. The strength of the reinforced soil body 200 after reinforcement is not less than 1.0 Mpa.

Preferably, in order to ensure the reinforcement quality, the reinforcement of the reinforced soil body 200 may be performed first, and then the excavation of the sewage pipe 100 may be performed.

And step three, drilling holes 300 at the positioning positions on the reinforced soil body 200 embedded with the sewage pipeline 100.

In particular, fig. 1 shows a longitudinal section through an aperture and a sewer pipe according to an embodiment of the invention, and fig. 2 shows a cross section through an aperture and a sewer pipe according to an embodiment of the invention. Referring to fig. 1 and 2, in this step, the drilling equipment is placed directly above the location of the gas permeable well and the drilling center is guaranteed to be on a vertical line with the location center of the gas permeable well. The inner diameter of the drilled hole 300 is larger than the outer diameter of the preset vent well. The hole 300 is drilled to about 0.5 meters above the sewer pipe 100 to avoid the drill bit damaging the wall of the sewer pipe 100.

Specifically, the inner diameter of the hole 300 is about 0.5-0.8 m larger than the outer diameter of the preset vent well, so that the subsequent steps can be conveniently carried out.

And step four, inserting the steel protective pipe 400 into the drilled hole 300.

Fig. 3 is a schematic diagram illustrating a fourth step and a fifth step in the installation process of the gas permeable well, according to fig. 3, a steel protective pipe 400 is lowered into the hole 300 by using a hoisting device, the thickness of the pipe wall of the steel protective pipe 400 is 1-2 cm, the outer diameter of the steel protective pipe is equal to the inner diameter of the hole 300, and the steel protective pipe can firmly abut against the hole wall of the hole 300. The steel casing 400 can prevent mud in the reinforced soil body 200 from entering a preset ventilation well opening space.

And step five, injecting a sealing material 310 between the steel protective pipe 400 and the hole wall of the hole 300, and fixedly connecting the sealing material 310 between the steel protective pipe 400 and the hole wall of the hole 300 to form a sealing barrier.

Fig. 4 is a schematic structural diagram of a steel casing according to an embodiment of the present invention, and referring to fig. 4, a plurality of grouting pipes 410 are attached to the steel casing 400. The grouting pipes 410 are fixedly connected to the steel protection pipe 400 at equal intervals in the circumferential direction, and the sealing material 310 is injected into the steel protection pipe 400 and the hole wall of the hole 300, i.e., a gap between the steel protection pipe 400 and the reinforced soil body 200, through the grouting pipes 410.

Specifically, the sealing material 310 is a water-stopping material containing a foaming agent component, as shown in fig. 3. The sealing material 310 forms a sealing barrier at the bottom of the hole 300, and the sealing barrier can play a role in preventing water and prevent the leakage of sewage and the erosion of soil in the construction process of the ventilation well.

Step six, after the sealing material 310 connects the reinforced soil body 200 with the steel protective pipe 400 to form a sealing barrier, and before the jacking steel prefabricated jacking pipe joint 610, pumping out the slurry in the hole 300.

And step seven, arranging a jacking device 500 and a steel prefabricated jacking pipe joint 610 in the sewage pipeline 100.

Fig. 5 is a schematic diagram illustrating a seventh step of the installation process of the gas permeable well according to the embodiment of the present invention, and referring to fig. 5, a jacking device 500 in this step is disposed in the sewage pipe 100 right below the gas permeable well opening position predetermined in the first step, and a prefabricated steel jacking pipe section 610 with a wall thickness of about 1-2 cm is placed on the jacking device 500.

And step eight, the jacking device 500 drives the steel prefabricated jacking pipe joint 610 to penetrate through the side wall of the sewage pipeline 100 and extend into the steel protective pipe 400.

Fig. 6 shows schematic diagrams of an eighth step, a ninth step and a tenth step of the installation process of the ventilation well, and fig. 7 shows a schematic structural diagram marked by a in fig. 6. Referring to fig. 6, the steel prefabricated jacking pipe segment 610 moves upward by the jacking device 500, breaks the sidewall of the sewage pipe 100, and enters the steel protective pipe 400.

Specifically, after the prefabricated steel jacking pipe section 610 completely extends into the steel protective pipe 400, since the hole 300 is spaced apart from the sewage pipe 100 by about 0.5 m, a reinforcing structure 110 is required to be disposed to hermetically connect the prefabricated steel jacking pipe section 610 and the sewage pipe 100, as shown in fig. 7.

Specifically, referring to fig. 7, the reinforcing structure 110 includes a reinforcing steel beam 111 and a steel fixing plate 112. The reinforcing steel beam 111 is fixedly connected to the wall of the hole of the steel prefabricated jacking pipe section 610 of the sewage pipe 100. The reinforced steel beam 111 is fixed on the sewage pipeline 100, and the steel fixing plate 112 is fixed on the reinforced steel beam 111 and the inner wall of the steel prefabricated jacking steel pipe section 610. The two sides of the steel fixing plate 112 can be fixedly connected to the inner side of the reinforced steel beam 111 and the inner wall of the steel prefabricated jacking pipe joint 610 in a welding manner.

And step nine, placing the steel pipe joint 620 into the steel protective pipe 400.

Fig. 8 is a schematic structural diagram of a joint of a plurality of steel pipe joints according to an embodiment of the present invention. When the installation of the ventilation well can be completed only by one steel pipe joint 620 when the depth of the hole 300 is large, the steel pipe joint 620 is lowered into the steel protective pipe 400 by utilizing the hoisting equipment and is abutted against the prefabricated steel jacking pipe joint 610, and the steel pipe joint 620 and the prefabricated steel jacking pipe joint 610 are fixedly welded at the abutted positions, as shown in fig. 6 and 8.

Fig. 9 shows a structural schematic diagram of a steel pipe section provided in an embodiment of the present invention, and referring to fig. 8 and 9, a plurality of guide plates 621 are fixedly connected to an outer wall of the steel pipe section 620, and the plurality of guide plates 621 are fixedly connected to the steel pipe section 620 along a circumferential direction.

Specifically, the guide plate 621 includes a fixing portion and a guide portion fixedly coupled to each other. One end of one steel pipe joint 620 is clamped and fixed on a fixing part of the other steel pipe joint 620, and one end of the prefabricated steel jacking pipe joint 610 is clamped and fixed on a fixing part of the steel pipe joint 620 adjacent to the prefabricated steel jacking pipe joint.

More specifically, the guide portion of the guide plate 621 is gradually distanced from the outer pipe wall of the steel pipe section 620 in a direction toward the sewage pipe 100.

Step ten, filling materials 320 are injected between the steel pipe joints 620 and the steel protective pipes 400.

Specifically, when the depth of the hole 300 needs to connect a plurality of steel pipe sections 620 to complete the installation of the gas permeable well, the plurality of steel pipe sections 620 are placed into the steel casing 400 one by one, and the filler 320 is injected between the steel pipe sections 620 and the steel casing 400 layer by layer. Every time one steel pipe joint 620 is placed, the filler 320 is injected between the steel pipe joint 620 and the steel casing pipe 400. The filling height of the filler 320 is about 0.5 m lower than the upper edge of the steel pipe section 620, so that the subsequent welding of the steel pipe section 620 and the steel pipe section 620 is facilitated. The filler 320 provided in this embodiment is medium sand.

Specifically, the pipe diameter of the steel prefabricated jacking pipe joint 610 in the above steps is consistent with the pipe diameter of the steel pipe joint 620, and the ventilation well 600 with a smooth and complete outer surface can be formed after welding and fixing.

Step eleven, the steel protective tube 400 is drawn out of the hole 300.

Step twelve, filling materials 320 are injected between the steel pipe joints 620 and the hole walls of the holes 300 again.

Specifically, after the eleventh step, a new gap is created between the outer wall of the gas permeable well 600 and the inner wall of the hole 300 after the welded connection is completed due to the separation of the steel protective tube 400, so that the filler 320 is injected again until the ground position, and the gap is filled, thereby ensuring the stability of the gas permeable well 600.

And thirteen, finishing the construction site to finish the construction of the ventilation well.

Fig. 10 shows a thirteenth step schematic diagram of a gas permeable well installation process provided by the embodiment of the invention. As shown in fig. 10, the resulting gas permeable well 600 is formed. This ventilative well 600 intercommunication sewer line 100 and the outer space on the ground, can in time derive sewer line 100 with the gas that produces in the sewage, avoid the emergence of phenomenon such as pulse form stifled gas phenomenon and water hammer, surge, prevent that sewer line 100 from breaking.

The prefabricated jacking pipe coupling 610 of steel in this scheme, steel pipe section 620 and steel pillar 400's material all do not all are not limited to steel, can realize that the arbitrary material of this scheme is all can.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method of constructing a gas permeable well, comprising:

drilling a hole (300) in a reinforced soil body (200) for burying a sewage pipeline (100);

inserting a steel protective pipe (400) into the hole (300);

a sealing material (310) is injected between the steel protective pipe (400) and the hole wall of the hole (300), and the reinforced soil body (200) and the steel protective pipe (400) form a sealing barrier through the sealing material (310);

arranging a jacking device (500) and a steel prefabricated jacking pipe joint (610) in the sewage pipeline (100);

the jacking device (500) drives the steel prefabricated jacking pipe joint (610) to penetrate through the side wall of the sewage pipeline (100) and extend into the steel protective pipe (400);

putting the steel pipe joint (620) into the steel protective pipe (400);

filling materials (320) are injected between the steel pipe joint (620) and the steel protective pipe (400);

drawing the steel protective pipe (400) out of the hole (300);

and filling materials (320) are injected between the steel pipe joints (620) and the hole walls of the holes (300).

2. The ventilation well construction method according to claim 1, wherein the holes (300) are spaced apart from the sewer pipe (100), and a reinforcement structure (110) is provided to sealingly connect the prefabricated steel jacking pipe section (610) and the sewer pipe (100).

3. The ventilation well construction method according to claim 2, wherein the reinforcement structure (110) comprises a reinforcement steel beam (111) and a steel fixing plate (112), the reinforcement steel beam (111) is fixed to the sewer pipe (100), and the steel fixing plate (112) fixes the reinforcement steel beam (111) and the inner wall of the steel precast jacking pipe section (610).

4. The vent-well construction method according to claim 1, wherein the steel casing (400) is fixedly connected with a plurality of grouting pipes (410), the plurality of grouting pipes (410) are fixedly connected to the steel casing (400) at equal intervals in the circumferential direction, and the sealing material (310) is injected between the steel casing (400) and the wall of the hole (300) through the grouting pipes (410).

5. The permeable well construction method of claim 1, wherein slurry in the bore hole (300) is pumped out after the sealing material (310) forms a sealing barrier and before jacking the steel prefabricated jacking pipe section (610).

6. The vent well construction method according to claim 1, wherein when a plurality of steel pipe segments (620) are provided:

placing a plurality of steel pipe sections (620) into the steel protective pipe (400) one by one;

and filling materials (320) are injected between the steel pipe joint (620) and the steel protective pipe (400) layer by layer.

7. The ventilation well construction method according to claim 6, wherein the packing (320) is injected between the steel pipe joint (620) and the steel casing (400) every time one steel pipe joint (620) is placed.

8. The ventilation well construction method according to claim 6, wherein the outer wall of the steel pipe joint (620) is fixedly connected with a guide plate (621), the guide plate (621) comprises a fixing part, one end of one steel pipe joint (620) is clamped on the fixing part of the other steel pipe joint (620), and one end of the prefabricated steel jacking pipe joint (610) is clamped on the fixing part of the steel pipe joint (620) adjacent to the prefabricated steel jacking pipe joint.

9. The ventilation well construction method of claim 8, wherein the guide plate (621) further comprises a guide portion connected to the fixing portion, the guide portion being gradually distant from an outer pipe wall of the steel pipe section (620) in a direction toward the sewage conduit (100).

10. The vent well construction method according to any one of claims 1 to 9, wherein the pipe diameter of the steel prefabricated jacking pipe section (610) is identical to the pipe diameter of the steel pipe section (620).