CN111894103A - Pipe jacking connection guide row structure and pipe jacking connection method - Google Patents
Pipe jacking connection guide row structure and pipe jacking connection method Download PDFInfo
- Publication number
- CN111894103A CN111894103A CN202010933903.0A CN202010933903A CN111894103A CN 111894103 A CN111894103 A CN 111894103A CN 202010933903 A CN202010933903 A CN 202010933903A CN 111894103 A CN111894103 A CN 111894103A
- Authority
- CN
- China
- Prior art keywords
- pipe
- newly
- built
- jacking
- well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention relates to a pipe jacking connection guide row structure and a pipe jacking connection method. The invention aims to solve the problems of huge sewage guide and discharge amount, high construction cost and long construction period in the existing pipe jacking connection guide mode. The technical scheme of the invention is as follows: the utility model provides a push pipe drainage guide structure of plugging into, sets up in the current situation well, and this current situation well has connect the current situation pipe of upper reaches and the current situation pipe of low reaches, its characterized in that: the device is provided with a newly-built guide exhaust pipe, one end of the newly-built guide exhaust pipe is inserted into an upstream current pipe, the other end of the newly-built guide exhaust pipe is inserted into a downstream current pipe, the upstream current pipe and the downstream current pipe are communicated, and a newly-built plugging structure is adopted to plug a gap between the newly-built guide exhaust pipe and the upstream current pipe and the downstream current pipe; the newly-built guide exhaust pipe is divided into a plurality of sections of guide exhaust pipe sections, the length of each section of guide exhaust pipe section is smaller than the inner diameter of the existing well, two adjacent sections of guide exhaust pipe sections are connected through a hinge piece, and a flange used for being connected with the other section of guide exhaust pipe section is arranged at the hinged end of each guide exhaust pipe section. The invention is suitable for the field of municipal water supply and drainage.
Description
Technical Field
The invention relates to a pipe jacking connection guide row structure and a pipe jacking connection method. Is suitable for the field of municipal water supply and drainage.
Background
Municipal drainage pipeline is in the construction process, can meet the problem of plugging into of newly-built pipeline and present situation pipeline usually, especially in sewage pipeline construction process, because urban sewage system is in incessant operation, will realize newly-built pipeline and the pipeline that the present situation is moving plug into, need carry out sewage drainage guide construction first, with sewage from the upper reaches drainage guide to low reaches, ensure that the point of plugging into does not have rivers, just can make things convenient for the construction of plugging into of follow-up newly-built pipeline.
To burying the little connection of depth, pipeline diameter, it is comparatively easy to connect into usually, and sewage up-and-down stream leads the discharge capacity little, and required time limit for a project is short, can adopt the excavation construction to connect into, and its main construction sequence is: (1) determining the elevation and the coordinate of the newly-built pipeline; (2) excavating the groove to the outer side of the current well wall; (3) carrying out sewage drainage by arranging adjacent inspection wells above and below the existing well; (4) drilling a hole on the current well wall; (4) laying a pipeline to communicate the newly-built inspection well with the current inspection well; (5) and reinforcing the hole and backfilling the groove.
For the sewage main pipe that the buried depth is big, the pipe diameter is big, and the water yield is many to plug into, adopt the mode of newly-built open caisson in the actual construction more, its main construction order: (1) determining the elevation and the coordinate of the newly-built pipeline; (2) newly building a working well and a receiving well to a designed elevation; (3) pipe jacking construction, namely jacking the newly-built pipeline from the working well to a receiving well; (4) and the sewage guide and drainage device guides and discharges the upstream sewage of the current sewage pipe to the downstream to ensure that no water exists at the connection point. (5) The top pipe is communicated with the current pipe.
The prior art can realize the connection of a newly-built pipeline and a current pipeline, but because the open caisson is newly added, the construction period is long, and the cost is high. In addition, because a water suction pump is needed for drainage, the required sewage drainage quantity is huge during connection. Therefore, a connection guide row mode which has the advantages of simple process, convenient guide row, high work efficiency, small potential safety hazard, lower cost and small interference to the life of surrounding residents is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the existing problems, the pipe jacking connection guide and drainage structure and the pipe jacking connection method are provided to solve the problems of huge sewage guide and drainage amount, high construction cost and long construction period in the existing pipe jacking connection guide mode.
The technical scheme adopted by the invention is as follows: the utility model provides a push pipe drainage guide structure of plugging into, sets up in the current situation well, and this current situation well has connect the current situation pipe of upper reaches and the current situation pipe of low reaches, its characterized in that: the device is provided with a newly-built guide exhaust pipe, one end of the newly-built guide exhaust pipe is inserted into an upstream current pipe, the other end of the newly-built guide exhaust pipe is inserted into a downstream current pipe, the upstream current pipe and the downstream current pipe are communicated, and a newly-built plugging structure is adopted to plug a gap between the newly-built guide exhaust pipe and the upstream current pipe and the downstream current pipe;
the newly-built guide exhaust pipe is divided into a plurality of sections of guide exhaust pipe sections, the length of each section of guide exhaust pipe section is smaller than the inner diameter of the existing well, two adjacent sections of guide exhaust pipe sections are connected through a hinge piece, and a flange used for being connected with the other section of guide exhaust pipe section is arranged at the hinged end of each guide exhaust pipe section.
When the pipe diameter of the current pipe is DN2200, the pipe diameter of the newly-built guide pipe is DN 1000.
A pipe jacking connection method is used for connecting a pipe jacking to a current well, and is characterized in that:
constructing a newly-built pipe jacking working well, and reserving holes at corresponding positions on the working well;
jacking the jacking pipe to the current well through a hole on the newly-built jacking pipe working well;
before the jacking pipe is jacked to the current well, arranging the jacking pipe connection guide row structure in the current well;
and continuing jacking the jacking pipe to the existing well, taking out the pipe jacking machine head after jacking, and taking out the newly-built guide and discharge pipe and the newly-built plugging structure, so that the communication between a newly-built pipeline formed by the jacking pipe and the existing pipe network system is realized.
Set up in the present situation well the push pipe guide gang structure of plugging into includes:
the newly-built guide exhaust pipe is arranged into a bending state convenient for entering the existing well through a hinge piece on the newly-built guide exhaust pipe;
hoisting the bent newly-built guide discharge pipe into the existing well;
two ends of the newly built guide exhaust pipe respectively correspond to the current pipes at the upper and lower reaches;
the newly-built guide exhaust pipe is gradually changed from a bending state to a straight state through a hinge piece, and two ends of the newly-built guide exhaust pipe are respectively inserted into the current pipes at the upper and lower streams; (the depth of insertion should be greater than 1m)
The newly-built guide exhaust pipe is fixed through a flange on the newly-built guide exhaust pipe in a straight state;
and a newly-built plugging structure is adopted to plug the gap between the newly-built guide exhaust pipe and the upstream and downstream existing pipes.
And the bottom of the newly-built pipe jacking working well is protected by riprap.
The newly-built pipe jacking working well main body is prefabricated by waterproof concrete, the concrete grade is C30, and the impermeability grade is P6.
Newly-built push pipe working well adopts the interior excavation of well to sink, reachs the design elevation after, pours the reinforced concrete bottom plate, adopts under water not disperse concrete, and its slump is 180mm, and the continuous even pouring is gone up in the whole basal area of bottom sealing concrete open caisson, and the pipe insert concrete degree of depth is about 0.5m when pouring, reaches the design strength after, takes the bottom infiltration out in the well to find the bottom quality, carry out the leaking stoppage processing to the percolating water position.
The main body of the newly-built pipe jacking working well is cast in situ by a reverse construction method, namely, a first section of soil pit is excavated, a reinforcing steel bar is arranged on the inner wall to form a template, concrete is poured, concrete curing is carried out after pouring is finished, the template is finally removed to form a retaining wall, and accordingly, the reinforced concrete bottom sealing is carried out after the last section of retaining wall is finished and the design elevation is reached, so that the newly-built pipe jacking working well is formed.
If the underground water level is high, performing high-pressure jet grouting pile construction on the periphery of the newly-built pipe-jacking working well to form a water stop wall on the outer wall of the well, wherein the bottom of the pile is more than 1m above the bottom of the open caisson, and the top of the pile is about 1m above the top of the silt layer; when the geological condition is better, the high-pressure jet grouting pile can be omitted.
Rigid waterproof sleeves are designed at the openings of the newly-built pipe jacking working well and the current well through which the jacking pipes pass.
The invention has the beneficial effects that: the newly-built drainage guide pipe is arranged in the existing well to communicate the existing pipes on the upper stream and the lower stream of the existing well, and sewage drainage of the existing pipes is not needed by a water suction pump, so that the upstream and downstream drainage of sewage can be realized, the existing operation of the existing sewage system is ensured, meanwhile, the connection construction of the proposed pipeline and the existing pipe network system is not influenced, the drainage construction cost can be greatly reduced, and the influence on the surrounding environment can be reduced.
The newly-built guide exhaust pipe is divided into a plurality of guide exhaust pipe sections, the guide exhaust pipe sections are connected through the hinge parts, so that when the newly-built guide exhaust pipe is hoisted to enter a current well, the newly-built guide exhaust pipe is in a bent state through the hinge parts to adapt to the size of the current well, two ends of the newly-built guide exhaust pipe can be gradually straightened after corresponding to upstream and downstream current pipes, the two ends of the newly-built guide exhaust pipe extend into the current pipes, and the guide exhaust pipe sections are fixedly connected through flanges after being straightened. The invention simplifies the installation steps of the newly built guide exhaust pipe and shortens the installation time.
The invention has the advantages of simple process, convenient guide and exhaust, high work efficiency, small potential safety hazard, low cost and small interference to the life of surrounding residents, and has important significance for the connection guide and exhaust construction of newly-built pipelines and current pipe network systems.
Drawings
Fig. 1 is a schematic plan view of an embodiment.
Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.
Fig. 3 is a schematic sectional view taken along line B-B of fig. 1.
In the figure: 1. jacking pipes; 2. climbing a ladder; 3. a well cover; 4. newly building a pipe jacking working well; 5. a rigid waterproof sleeve; 6. a live well; 7. a status quo pipe; 8. newly building a plugging structure; 9. newly building a guide exhaust pipe; 10. throwing stones to protect the bottom; 11. a flange; 12. a hinge member.
Detailed Description
The embodiment is a pipe jacking connection method, which comprises the following steps:
before the newly-built pipe-jacking working well is constructed, underground pipelines need to be detected in detail, including the elevation and the coordinates of the pipelines at the present situation, particularly the peripheral pipelines of the newly-built pipe-jacking working well. During the sinking process, the nearby pipelines need to be properly protected to prevent damage, and the whole process is monitored.
Before the newly-built pipe-jacking working well is constructed, the geological conditions of the proposed pipe jacking and the periphery of the newly-built pipe-jacking working well are analyzed, and the bottom of the newly-built pipe-jacking working well is processed by adopting riprap bottom protection.
And carrying out foundation pit enclosure on the periphery of the newly-built pipe jacking working well, and arranging a drainage ditch of 0.5m by 0.5m at a position 2m outside the foundation pit, wherein the drainage ditch is mainly used for reducing water and soil loss.
When the newly-built pipe-jacking working well is constructed, excavated earthwork is timely transported away from an orifice and cannot be stacked around the orifice, and the safety of a well wall cannot be influenced by vehicles for transporting abandoned soil. The newly-built pipe jacking working well main body is prefabricated by waterproof concrete, the concrete grade is C30, and the impervious grade is P6. Holes are reserved according to the designed pipeline elevation in the manufacturing process, and a rigid waterproof sleeve is installed.
And jacking the jacking pipe to the current well through the hole on the newly-built jacking pipe working well.
The pipe jacking is before pushing up to the present well, set up the pipe jacking and plugging into the leading bank structure in the present well, the pipe jacking is plugged into the leading bank structure and is had the newly-built calandria that the pipe diameter is DN1000, the material is the steel pipe, this newly-built calandria one end is inserted in the present pipe that the upstream pipe diameter is DN2200, the other end is inserted in the present pipe that the downstream pipe diameter is DN2200, communicate upstream and downstream present pipe, and adopt newly-built shutoff structure shutoff in the newly-built calandria and the clearance between upstream and downstream present pipe, the newly-built calandria of sewage accessible at this moment is managed by the upstream present pipe water conservancy diversion to.
After the newly-built guide exhaust pipe is installed, a static cutting technology combining a diamond rope saw and a diamond water drill is adopted to cut the side wall of the existing well, the height of the cut is consistent with that of a pipeline and is about 1.1 times of that of a pipe jacking machine head, and a rigid waterproof sleeve is installed after the cut is completed.
And (4) continuing jacking the jacking pipe to the existing well, taking out the pipe jacking machine head after jacking, and taking out the newly-built guide and discharge pipe and the newly-built plugging structure, so that the communication between a newly-built pipeline formed by the jacking pipe and the existing pipe network system is realized.
The method for setting the pipe jacking connection guide row structure in the embodiment comprises the following steps:
the newly-built guide exhaust pipe is arranged into a bending state convenient for entering the existing well through a hinge piece on the newly-built guide exhaust pipe;
hoisting the bent newly-built guide discharge pipe into the existing well;
two ends of the newly built guide exhaust pipe respectively correspond to the current pipes at the upper and lower reaches;
the newly-built guide exhaust pipe is gradually changed from a bending state to a straight state through a hinge piece, and two ends of the newly-built guide exhaust pipe are respectively inserted into the current pipes at the upper and lower streams;
the newly-built guide exhaust pipe is fixed through a flange on the newly-built guide exhaust pipe in a straight state;
and a newly-built plugging structure is adopted to plug the gap between the newly-built guide exhaust pipe and the upstream and downstream existing pipes.
In the embodiment, the newly built pipe jacking working well adopts the mode that earth is dug in the well and sinks, after the working well reaches the designed elevation, a reinforced concrete bottom plate is poured, underwater undispersed concrete is adopted, the slump degree is 180mm, the whole bottom area of the bottom sealing concrete open caisson is continuously and uniformly poured, a guide pipe is inserted into the concrete to the depth of about 0.5m during pouring, after the designed strength is reached, the bottom of the well is drawn out for water seepage, the quality of the bottom sealing is checked, and the water seepage position is subjected to plugging treatment.
In the embodiment, the newly-built pipe-jacking working well and the existing well are provided with the crawling ladder which is made of plastic steel, the installation is that the stepping center line is radially exposed for 100mm, the first step is 220mm away from the top surface of the well lid, and the rest distances are 360mm until the bottom of the well. The newly-built jacking pipe working well and the top of the existing well adopt a phi 700 and D400 type ball-milling cast iron well cover, and the elevation of the well cover is flush with the elevation of the ground.
In other embodiments, due to the complexity of underground pipelines, the open caisson cannot be directly sunk, the main body of the newly-built pipe-jacking working well is cast in place by a reverse method, namely, a first soil pit is excavated, a reinforcing steel bar setting template is installed on the inner wall, concrete is poured, concrete curing is carried out after the pouring is finished, the template is removed to form a retaining wall, and accordingly, the reinforced concrete bottom sealing is carried out after the last retaining wall is finished and the designed elevation is reached, so that the newly-built pipe-jacking working well is formed.
In other embodiments, if the underground water level is high, high-pressure jet grouting pile construction needs to be performed around the newly-built pipe-jacking working well to form a water stop wall of the outer wall of the well, the bottom of the pile is more than 1m of the bottom of the open caisson, and the top of the pile is about 1m of the top of the silt layer.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It is apparent that the present invention is not limited to the details of the above exemplary embodiments, and it is understood that those skilled in the art can make many modifications and variations according to the concept of the present invention without inventive faculty, without departing from the spirit or essential characteristics of the invention.
Claims (10)
1. The utility model provides a push pipe drainage guide structure of plugging into, sets up in the current situation well, and this current situation well has connect the current situation pipe of upper reaches and the current situation pipe of low reaches, its characterized in that: the device is provided with a newly-built guide exhaust pipe, one end of the newly-built guide exhaust pipe is inserted into an upstream current pipe, the other end of the newly-built guide exhaust pipe is inserted into a downstream current pipe, the upstream current pipe and the downstream current pipe are communicated, and a newly-built plugging structure is adopted to plug a gap between the newly-built guide exhaust pipe and the upstream current pipe and the downstream current pipe;
the newly-built guide exhaust pipe is divided into a plurality of sections of guide exhaust pipe sections, the length of each section of guide exhaust pipe section is smaller than the inner diameter of the existing well, two adjacent sections of guide exhaust pipe sections are connected through a hinge piece, and a flange used for being connected with the other section of guide exhaust pipe section is arranged at the hinged end of each guide exhaust pipe section.
2. The pipe jacking docking guide row structure of claim 1, wherein: when the pipe diameter of the current pipe is DN2200, the pipe diameter of the newly-built guide pipe is DN 1000.
3. A pipe jacking connection method is characterized in that:
constructing a newly-built pipe jacking working well, and reserving holes at corresponding positions on the working well;
jacking the jacking pipe to the current well through a hole on the newly-built jacking pipe working well;
before the jacking pipe is jacked to the existing well, arranging the jacking pipe connection guide row structure of claim 1 or 2 in the existing well;
and continuing jacking the jacking pipe to the existing well, taking out the pipe jacking machine head after jacking, and taking out the newly-built guide and discharge pipe and the newly-built plugging structure, so that the communication between a newly-built pipeline formed by the jacking pipe and the existing pipe network system is realized.
4. A pipe jacking docking method according to claim 3, wherein: set up in the present situation well the push pipe guide gang structure of plugging into includes:
the newly-built guide exhaust pipe is arranged into a bending state convenient for entering the existing well through a hinge piece on the newly-built guide exhaust pipe;
hoisting the bent newly-built guide discharge pipe into the existing well;
two ends of the newly built guide exhaust pipe respectively correspond to the current pipes at the upper and lower reaches;
the newly-built guide exhaust pipe is gradually changed from a bending state to a straight state through a hinge piece, and two ends of the newly-built guide exhaust pipe are respectively inserted into the current pipes at the upper and lower streams;
the newly-built guide exhaust pipe is fixed through a flange on the newly-built guide exhaust pipe in a straight state;
and a newly-built plugging structure is adopted to plug the gap between the newly-built guide exhaust pipe and the upstream and downstream existing pipes.
5. A pipe jacking docking method according to claim 3, wherein: and the bottom of the newly-built pipe jacking working well is protected by riprap.
6. A pipe jacking docking method according to claim 3, wherein: the newly-built pipe jacking working well main body is prefabricated by waterproof concrete, the concrete grade is C30, and the impermeability grade is P6.
7. A pipe jacking docking method according to claim 3, wherein: newly-built push pipe working well adopts the interior excavation of well to sink, reachs the design elevation after, pours the reinforced concrete bottom plate, adopts under water not disperse concrete, and its slump is 180mm, and the continuous even pouring is gone up in the whole basal area of bottom sealing concrete open caisson, and the pipe insert concrete degree of depth is about 0.5m when pouring, reaches the design strength after, takes the bottom infiltration out in the well to find the bottom quality, carry out the leaking stoppage processing to the percolating water position.
8. A pipe jacking docking method according to claim 3, wherein: the main body of the newly-built pipe jacking working well is cast in situ by a reverse construction method, namely, a first section of soil pit is excavated, a reinforcing steel bar is arranged on the inner wall to form a template, concrete is poured, concrete curing is carried out after pouring is finished, the template is finally removed to form a retaining wall, and accordingly, the reinforced concrete bottom sealing is carried out after the last section of retaining wall is finished and the design elevation is reached, so that the newly-built pipe jacking working well is formed.
9. A pipe jacking docking method according to claim 3, wherein: and performing high-pressure jet grouting pile construction on the periphery of the newly-built pipe-jacking working well to form a water stop wall of the outer wall of the well, wherein the bottom of the pile is above 1m of the bottom of the open caisson, and the top of the pile is about 1m of the top of the silt layer.
10. A pipe jacking docking method according to claim 3, wherein: rigid waterproof sleeves are designed at the openings of the newly-built pipe jacking working well and the current well through which the jacking pipes pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933903.0A CN111894103A (en) | 2020-09-08 | 2020-09-08 | Pipe jacking connection guide row structure and pipe jacking connection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933903.0A CN111894103A (en) | 2020-09-08 | 2020-09-08 | Pipe jacking connection guide row structure and pipe jacking connection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111894103A true CN111894103A (en) | 2020-11-06 |
Family
ID=73225516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010933903.0A Pending CN111894103A (en) | 2020-09-08 | 2020-09-08 | Pipe jacking connection guide row structure and pipe jacking connection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111894103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175058A (en) * | 2021-04-21 | 2021-07-27 | 中交水利水电建设有限公司 | Existing underground jacking pipe access construction method |
-
2020
- 2020-09-08 CN CN202010933903.0A patent/CN111894103A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175058A (en) * | 2021-04-21 | 2021-07-27 | 中交水利水电建设有限公司 | Existing underground jacking pipe access construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102454167B (en) | The construction method of especially big & deep open caisson | |
| CN104711994A (en) | Foundation pit deep well rainfall and plugging construction method | |
| US11566390B2 (en) | Construction method of reclaiming land from the sea based on basement utilization | |
| CN103993603A (en) | Top-down construction method for anchor rod and rotary jet grouting back cover deep foundation pit without precipitation operation | |
| CN212896422U (en) | Deep foundation pit water intercepting and draining device | |
| CN202194148U (en) | Waterproof curtain | |
| CN113463670A (en) | Water pumping and draining method and water pumping and draining structure for deep foundation pit bottom plate construction | |
| CN113279421B (en) | Vacuum dewatering process for deep foundation pit | |
| CN110847199A (en) | Construction method for drainage of underground water of deep foundation pit | |
| CN113266392A (en) | Pipe jacking construction method for penetrating through existing anchor cable group | |
| CN102912789A (en) | Mechanical hole forming technology applied to karst landform | |
| CN212336250U (en) | Pipe jacking connection guide row structure | |
| CN112282029B (en) | Connection construction method for urban high-water-level large-diameter reinforced concrete sewage pipeline | |
| CN109056767A (en) | A kind of rich water powder land floor precipitation and recharge construction method | |
| CN111894103A (en) | Pipe jacking connection guide row structure and pipe jacking connection method | |
| CN110939150A (en) | Emergency rescue method for rapidly constructing large-hydraulic-slope-drop-ratio thin-wall structure in confined water inrush accident state | |
| CN217053672U (en) | Large-diameter inspection well pile drilling method construction system | |
| CN204435321U (en) | A kind of steam power station water intaking open channel | |
| CN115162347A (en) | Deep foundation pit pipe network construction process | |
| CN104846837A (en) | Construction method for ultra-deep well pit in surface drainage foundation pit | |
| CN107975376A (en) | Tunneling shield push pipe and vertical duct connection structure and construction method | |
| CN208815550U (en) | A kind of rich water powder land floor precipitation and recharge construction system | |
| CN110185046B (en) | Ground source well-digging horizontal connecting pipe construction method | |
| CN110485465B (en) | Circular working well with water-rich stratum with preset pipe jacking door opening and construction method of circular working well | |
| CN111827198A (en) | Construction method for central control water replacement and filling in tidal lake water environment ecological restoration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |