CN114382158B

CN114382158B - Construction method of gas permeable well

Info

Publication number: CN114382158B
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: 2024-05-10
Anticipated expiration: 2041-12-30
Also published as: CN114382158A

Abstract

The invention belongs to the technical field of municipal pipeline engineering construction, and discloses a gas permeable well construction method, which comprises the following steps: drilling holes in the reinforced soil body of the buried sewage pipeline; inserting a steel protection tube into the hole; injecting a sealing material between the steel protection pipe and the wall of the hole, and reinforcing the soil body and the steel protection pipe to form a sealing barrier through the sealing material; a jacking device and a steel prefabricated jacking pipe joint are arranged 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 protection pipe; placing the steel pipe section into a steel protection pipe; filling filler is injected between the steel pipe section and the steel protection pipe; drawing the steel protection tube out of the hole; and filling materials are injected between the steel pipe joints and the wall of the holes. The method avoids adverse effects caused by foundation pit construction in cities, and has the advantages of simple equipment, low construction difficulty and risk, clear steps and strong economy.

Description

Construction method of gas permeable well

Technical Field

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

Background

In municipal sewage pressure transmission pipelines, a certain amount of gas is generated in sewage to influence the flow of fluid in the pipeline, and the pressure in the pipeline is rapidly increased when the pressure is severe, so that the sewage pipeline is broken.

It is often used to provide an exhaust device such as a gas permeable well in a sewage pipeline to prevent damage to the pipeline system caused by these gases. The general construction method is as follows: and opening a hole at the top of the sewage pipeline, installing a gas permeable well, and leading the gas in the pipeline to the ground through the gas permeable well. For a sewage main pipe with deeper burial depth, namely the sewage main pipe with burial depth larger than or equal to 5.0 meters and inner diameter larger than or equal to 3.5 meters, the main construction method of the gas permeable well is as follows: firstly, excavating a foundation pit at a well position, then pouring a lower overflow box body and an upper gas permeable well structure, then connecting the lower overflow box body with sewage pipelines of two-side underground excavation construction, and finally performing ground backfilling recovery.

The main disadvantages of the above method are: firstly, when a pipeline is buried deeply, great difficulty and risk exist when deep foundation pit construction is required; secondly, the foundation pit construction has great influence on surrounding environment, and the phenomenon of road occupation and traffic obstruction caused by excavation of the foundation pit in urban construction can be caused; thirdly, the deep buried pipeline is generally constructed by adopting underground excavation equipment, when the working procedures of connecting the lower part of the overflow box body with sewage pipelines at two sides are carried out, the working procedures of equipment receiving, starting and the like are required to be added, and the construction difficulty and risk are greatly increased; finally, the construction method has longer construction period, higher construction cost and less ideal economic benefit.

Therefore, there is a need for a gas permeable well construction method to solve the above problems.

Disclosure of Invention

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

To achieve the purpose, the invention adopts the following technical scheme:

a method of gas permeable well construction comprising:

Drilling holes in the reinforced soil body of the buried sewage pipeline;

Inserting a steel protection tube into the hole;

Injecting a sealing material between the steel protection pipe and the wall of the hole, and reinforcing the soil body and the steel protection pipe to form a sealing barrier through the sealing material;

a jacking device and a steel prefabricated jacking pipe joint are arranged 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 protection pipe;

Placing the steel pipe section into a steel protection pipe;

Filling filler is injected between the steel pipe section and the steel protection pipe;

Drawing the steel protection tube out of the hole;

And filling materials are injected between the steel pipe joints and the wall of the holes.

Optionally, the holes and the sewage pipeline are arranged at intervals, and a reinforcing structure is arranged to be in sealing connection with the steel prefabricated jacking pipe joint and the sewage pipeline.

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

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

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

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

placing a plurality of steel pipe joints into the steel protection pipe one by one;

filling materials are filled between the steel pipe joints and the steel protection pipes layer by layer.

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

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

Optionally, the guide plate further comprises a guide part connected to the fixing part, and the guide part is gradually far away from the outer pipe wall of the steel pipe section along the direction towards the sewage pipeline.

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

The invention has the beneficial effects that:

the position of the gas permeability well is preselected, a hole is formed in the position, a steel protection pipe is arranged in the hole, the jacking device drives the steel prefabricated jacking pipe joint to penetrate through the side wall of the sewage pipeline and stretch into the steel protection pipe, and the connecting procedure of the steel pipe joint and the communicating procedure of the sewage pipeline and the steel pipe joint are carried out in the steel protection pipe, so that adverse effects caused by foundation pit construction in cities are eliminated, the whole construction method is simple in equipment, procedures such as equipment receiving and starting are not required to be added in the process, construction difficulty and risk are low, the steps are clear, and economical efficiency is high.

Drawings

FIG. 1 is a longitudinal cross-sectional view of a hole and a sewage pipeline according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a hole and a sewer provided by an embodiment of the present invention;

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

FIG. 4 is a schematic view of a steel protection tube according to an embodiment of the present invention;

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

FIG. 6 is a schematic view of eighth, ninth and tenth steps of an installation process for gas permeable wells provided in an embodiment of the present invention;

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

FIG. 8 is a schematic view of a joint structure of a plurality of steel pipe joints according to an embodiment of the present invention;

fig. 9 is a schematic view of a steel pipe joint structure 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 according to 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 soil;

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

400. A steel protection tube; 410. grouting pipe;

500. A jacking device;

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

Detailed Description

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

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a gas permeable well construction method, which comprises the following steps:

and step one, positioning the gas permeable well opening position.

In this step, the subsequent placement of the jacking device 500 and the prefabricated steel jacking pipe sections 610 in the sewer piping 100 is facilitated by accurate measurement of the predetermined gas permeable well opening locations. And designing the gas permeable well, and presetting and determining the outer diameter of the gas permeable well.

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

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

Preferably, to ensure the reinforcement quality, reinforcement of the soil body 200 may be first performed, followed by the underground excavation of the sewage pipe 100.

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

Specifically, fig. 1 shows a longitudinal section view of a hole and a sewage pipeline provided by an embodiment of the present invention, and fig. 2 shows a cross section view of a hole and a sewage pipeline provided by an embodiment of the present invention. Referring to fig. 1 and 2, in this step, the drilling apparatus is positioned directly above the gas permeable well location and the drilling center is guaranteed to be in a vertical line with the gas permeable well location center. The inner diameter of the drilled hole 300 is greater than the outer diameter of the preset gas permeable well. The hole 300 is drilled to about 0.5m above the sewer line 100 to avoid the drill bit damaging the walls of the sewer line 100.

Specifically, the value of the inner diameter of the hole 300 should be about 0.5 to 0.8 meters larger than the outer diameter of the preset gas permeable well, so that the subsequent steps can be conveniently performed.

And step four, inserting a steel protection tube 400 into the drilled hole 300.

Fig. 3 is a schematic diagram showing a fourth and fifth steps in the installation process of the gas permeable well according to the embodiment of the present invention, referring to fig. 3, a steel protection pipe 400 is lowered into a hole 300 by using a lifting device, the thickness of the pipe wall of the steel protection pipe 400 is 1-2 cm, the outer diameter of the pipe wall is equal to the inner diameter of the hole 300, and the pipe wall can be firmly abutted against the wall of the hole 300. The steel protection pipe 400 can prevent mud in the reinforced soil body 200 from entering the preset gas permeable well opening space.

And fifthly, injecting a sealing material 310 between the steel protection pipe 400 and the wall of the hole 300, wherein the sealing material 310 is fixedly connected between the steel protection pipe 400 and the wall of the hole 300 to form a sealing barrier.

Fig. 4 shows a schematic structural diagram of a steel protection tube according to an embodiment of the present invention, and referring to fig. 4, a plurality of grouting pipes 410 are fixedly connected to the steel protection tube 400. The plurality of grouting pipes 410 are fixedly connected to the steel guard pipe 400 at the same circumferential interval, and the sealing material 310 is injected between the steel guard pipe 400 and the walls of the holes 300, i.e., the gaps between the steel guard pipe 400 and the reinforced soil body 200, through the grouting pipes 410.

Specifically, the sealing material 310 is a water stop 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, which can play a role in waterproofing, preventing the leakage of sewage and erosion of soil during the construction of the gas permeable well.

Step six, after the sealing material 310 connects the reinforced soil body 200 with the steel protection tube 400 to form a sealing barrier, the slurry in the hole 300 is pumped out before the steel prefabricated jacking pipe joint 610 is jacked up.

Step seven, a jacking device 500 and a steel prefabricated jacking pipe joint 610 are arranged in the sewage pipeline 100.

Fig. 5 is a schematic diagram showing a seventh step of the gas permeable well installation process 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 directly below the predetermined gas permeable well opening position in the first step, and a steel prefabricated jacking pipe joint 610 having a wall thickness of about 1-2 cm is placed on the jacking device 500.

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 protection pipe 400.

Fig. 6 shows a schematic diagram of eighth, ninth and tenth steps of the gas permeable well installation process provided by the embodiment of the present invention, and fig. 7 shows a schematic diagram of a structure labeled a in fig. 6. Referring to fig. 6, the prefabricated steel jacking pipe joint 610 moves upward by the jacking device 500, damages the sidewall of the sewage pipe 100, and then enters the steel protection pipe 400.

Specifically, after the steel prefabricated jacking pipe section 610 is completely extended into the steel protection pipe 400, since the holes 300 are spaced from the sewage pipe 100 by about 0.5 m, the reinforcement structure 110 is required to be provided, and the steel prefabricated jacking pipe section 610 and the sewage pipe 100 are hermetically connected, 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 girder 111 is fixedly attached to the wall of the through-hole of the steel prefabricated jacking pipe joint 610 of the sewage conduit 100. Reinforcing steel beams 111 are fixed to the sewage pipe 100, and steel fixing plates 112 fix the reinforcing steel beams 111 and the inner walls of the steel prefabricated jacking steel pipe sections 610. Both sides of the steel fixing plate 112 can be respectively fixedly connected to the inner side of the reinforced steel girder 111 and the inner wall of the steel prefabricated jacking pipe joint 610 by means of welding.

Step nine, placing the steel pipe section 620 into the steel protection pipe 400.

Fig. 8 shows a schematic structural diagram of a joint of a plurality of steel pipe joints according to an embodiment of the present invention. When the depth of the hole 300 is only one steel pipe section 620 to complete the installation of the gas permeable well, the steel pipe section 620 is lowered into the steel protection pipe 400 by using the lifting equipment, is abutted with the steel prefabricated jacking pipe section 610, and is welded and fixed at the abutting position of the steel pipe section 620 and the steel prefabricated jacking pipe section 610, as shown in fig. 6 and 8.

Fig. 9 shows a schematic structural view of a steel pipe joint according to 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 a steel pipe joint 620, and the plurality of guide plates 621 are fixedly connected to the steel pipe joint 620 in a circumferential direction.

Specifically, the guide plate 621 includes a fixing portion and a guide portion that are fixedly connected to each other. One end of one steel pipe section 620 is clamped to a fixing portion on the other steel pipe section 620, and is welded and fixed, and one end of the steel prefabricated jacking pipe section 610 is clamped to a fixing portion on the adjacent steel pipe section 620, and is welded and fixed.

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

Step ten, filling 320 is injected between the steel pipe joint 620 and the steel protection pipe 400.

Specifically, when the depth of the hole 300 requires that the plurality of steel pipe sections 620 be connected to complete the installation of the gas permeable well, the plurality of steel pipe sections 620 are placed one by one into the steel casing 400, and the filler 320 is injected between the steel pipe sections 620 and the steel casing 400 layer by layer. Each steel pipe section 620 is placed, i.e. filler 320 is injected between the steel pipe section 620 and the steel guard pipe 400. The filling height of the filler 320 is about 0.5 m lower than the upper edge of the Duan Gang pipe section 620, so that the subsequent welding of the steel pipe section 620 and the section of steel pipe section 620 is facilitated. The filler 320 provided in this embodiment is middlings.

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

Step eleven, the steel sheath 400 is pulled out of the hole 300.

Step twelve, the filler 320 is again injected between the steel pipe section 620 and the wall of the hole 300.

Specifically, after step eleven, a new gap is generated between the outer wall of the gas permeable well 600 and the inner wall of the hole 300, which are welded together, due to the detachment of the steel protection pipe 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 a construction site to finish the construction of the gas permeable well.

Fig. 10 shows a thirteenth step of the installation process of the gas permeable well according to the embodiment of the invention. The final gas permeable well 600 is shown in fig. 10. The gas permeable well 600 communicates the sewage pipe 100 with the external space above the ground, and can timely guide out the gas generated in the sewage to the sewage pipe 100, thereby avoiding the occurrence of pulse-like gas blocking phenomenon, water hammer, surge and other phenomena, and preventing the sewage pipe 100 from being broken.

The materials of the steel prefabricated jacking pipe joint 610, the steel pipe joint 620 and the steel protection pipe 400 in the scheme are not limited to steel materials, and any materials can be used for realizing the scheme.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. The construction method of the gas permeable well is characterized by comprising the following steps of:

Drilling holes (300) on a reinforced soil body (200) embedded with the sewage pipeline (100);

Inserting a steel protection tube (400) into the hole (300);

Injecting a sealing material (310) between the steel protection pipe (400) and the wall of the hole (300), and forming a sealing barrier between the reinforced soil body (200) and the steel protection pipe (400) through the sealing material (310);

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

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

Hoisting the steel pipe joint (620) into the steel protection pipe (400) and abutting against the steel prefabricated jacking pipe joint (610);

Filling (320) between the steel pipe section (620) and the steel protection pipe (400);

Drawing the steel protection tube (400) out of the hole (300);

Filling materials (320) are injected between the steel pipe sections (620) and the wall of the holes (300);

The holes (300) and the sewage pipeline (100) are arranged at intervals, and a reinforcing structure (110) is arranged to be connected with the steel prefabricated jacking pipe joint (610) and the sewage pipeline (100) in a sealing mode;

The reinforcing structure (110) comprises a reinforcing steel beam (111) and steel fixing plates (112), wherein the reinforcing steel beam (111) is fixedly connected to the sewage pipeline (100), and the steel fixing plates (112) are fixedly connected with the reinforcing steel beam (111) and the inner wall of the steel prefabricated jacking pipe joint (610).

2. The gas permeable well construction method according to claim 1, wherein the steel protection pipe (400) is fixedly connected with a plurality of grouting pipes (410), the plurality of grouting pipes (410) are fixedly connected to the steel protection pipe (400) at the same intervals along the circumferential direction, and the sealing material (310) is injected between the steel protection pipe (400) and the wall of the hole (300) through the grouting pipes (410).

3. The gas permeable well construction method according to claim 1, characterized in that after the sealing material (310) forms the sealing barrier, the slurry in the hole (300) is pumped out before the steel prefabricated jacking pipe section (610) is jacked up.

4. The gas permeable well construction method according to claim 1, wherein when a plurality of steel pipe sections (620) are provided:

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

Filling (320) is injected layer by layer between the steel pipe section (620) and the steel protection pipe (400).

5. The gas permeable well construction method according to claim 4, wherein each steel pipe section (620) is placed, i.e. a filler (320) is injected between the steel pipe section (620) and the steel protection pipe (400).

6. The gas permeable well construction method according to claim 4, wherein a guide plate (621) is fixedly connected to the outer wall of the steel pipe section (620), the guide plate (621) includes a fixing portion, one end of one steel pipe section (620) is clamped to the fixing portion of the other steel pipe section (620), and one end of the steel prefabricated jacking pipe section (610) is clamped to the fixing portion of the adjacent steel pipe section (620).

7. The gas permeable well construction method according to claim 6, wherein the guide plate (621) further comprises a guide portion connected to the fixing portion, the guide portion being gradually distant from the outer pipe wall of the steel pipe section (620) in a direction toward the sewage pipe (100).

8. The method for constructing a gas permeable well according to any one of claims 1 to 7, characterized in that the pipe diameter of the steel prefabricated jacking pipe section (610) is identical to the pipe diameter of the steel pipe section (620).