Hole-opening reinforcement construction method for miniature pipe-jacking-method single-side-access current brick inspection well

Abstract

The invention discloses a hole-opening reinforcement construction method for a miniature pipe-jacking-method single-side connection current brick inspection well, which comprises the following steps: 1, construction preparation: reinforcing a soil body on the outer side of a well wall to be perforated; 2, a temporary plugging structure is arranged in the current brick inspection well to temporarily plug the well wall to be perforated; 3, the front guide pipe of the micro jacking pipe is jacked according to a set route, the front guide pipe enters the current brick inspection well, and the hole opening position is temporarily blocked through polyurethane materials; 4, the miniature jacking pipe is jacked into the inner side of the current brick inspection well, and gaps between pipe joints of the miniature jacking pipe and the open holes are filled with dense waterproof glue or waterproof mortar to form permanent plugging; and 5, connecting the miniature jacking pipe with the current brick inspection well, and spraying polymer mortar on the inner wall of the current brick inspection well after the connection is completed. The safety of the brick inspection well can be guaranteed in the punching process, and meanwhile the durability of the brick inspection well in the long-term use stage is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of manhole drilling, and in particular to a manhole drilling and reinforcement construction method for a micro-pipe jacking method with single-side access to an existing brick-built manhole. Background Art

[0002] With the rapid development of cities, existing brick manholes play a vital role in drainage systems. However, over time, these manholes often face challenges such as insufficient material durability, poor impermeability, structural aging, insufficient load-bearing capacity, chemical corrosion, structural deformation, and foundation settlement. Relocating new manholes often requires occupying existing roads and facing the challenges of relocating various pipelines. Furthermore, temporary water diversion often takes a long time, significantly impacting the efficiency of urban drainage and sewage treatment.

[0003] In urban infrastructure construction, brick-built manholes are widely used as important drainage facilities for sewage and rainwater drainage systems. However, with the continuous advancement of urbanization, existing brick manholes are facing various problems during long-term use, such as structural aging, insufficient load-bearing capacity, poor impermeability, and chemical corrosion. These problems not only affect the normal function of the manholes but also threaten the safety of the surrounding environment to a certain extent.

[0004] When renovating existing brick inspection wells during pipe network renovations, it's often necessary to re-install them to accommodate new pipeline access. However, this often requires occupying public space on existing roads, leading to various pipeline relocation and traffic management challenges during construction. Furthermore, temporary water diversions are often necessary during construction, which can be time-consuming and negatively impact the city's drainage and sewage treatment efficiency. Furthermore, traditional hole-cutting methods significantly impact the structural integrity of the inspection wells, potentially leading to further subsidence and deformation.

[0005] Therefore, how to effectively solve the renovation problem of the existing brick inspection wells, improve the safety and construction efficiency of the project, and upgrade the urban drainage system has become a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0006] In view of the above-mentioned defects of the prior art, the present invention provides a micro-pipe jacking method for single-sided access to existing brick inspection wells for hole reinforcement construction. The purpose of achieving this is to ensure the safety of the brick inspection well during the hole opening process, while ensuring its durability in the long-term use stage. It not only improves the construction safety and connection stability of the inspection well and the new pipeline, but also effectively reduces the impact of construction on the surrounding environment, thereby providing a practical solution for the sustainable development of urban infrastructure.

[0007] To achieve the above-mentioned object, the present invention discloses a micro-pipe jacking method for single-side access to an existing brickwork inspection well, which is used to drill a hole in the side wall of an existing brickwork inspection well with an existing pipeline through a micro-pipe jacking method, and includes the following steps:

[0008] Step 1: Construction preparation: Reinforce the soil outside the well wall where the hole is to be opened; Use MJS to reinforce the soil outside the well wall where the hole is to be opened to form a reinforcement body; Fill the interface between the well wall where the hole is to be opened and the soil with polyurethane material surrounding the hole;

[0009] Step 2: Setting a temporary blocking structure in the existing brick-built inspection well to temporarily block the well wall to be opened;

[0010] The temporary blocking structure leaves a hole approximately equal to the size of the micro-jacking pipe;

[0011] Step 3: Push forward along the established route, slightly push the front conduit of the micro-jacking pipe, so that the front conduit enters the existing brick inspection well by at least 150 mm, and temporarily seal the opening position with polyurethane material;

[0012] Step 4: Push the micro-jacking pipe into the inside of the existing brick inspection well by at least 150 mm, and fill the gap between the pipe section of the micro-jacking pipe and the opening with dense waterproof glue or waterproof mortar to form a permanent seal;

[0013] Step 5: Connect the micro-jacking pipe to the existing brick inspection well, and spray polymer mortar on the inner wall of the existing brick inspection well after completion.

[0014] Preferably, before executing step 1, it is also necessary to verify the structural integrity of the existing brick inspection well, check whether the existing brick inspection well has damage including cracks and peeling, and evaluate the ability of the existing brick inspection well to resist sewage or rainwater penetration during long-term use; if the existing brick inspection well has structural safety problems, the well inner wall mortar centrifugal spraying method is used for repair, by spraying polymer anti-corrosion mortar on the inner wall of the existing brick inspection well and curing it to form a durable and anti-corrosion coating.

[0015] Preferably, in step 1, the reinforcement body extends to a range of 2 to 3 meters outside the outline of the existing brick inspection well.

[0016] Preferably, step 2 is as follows:

[0017] Step 2.1: In the existing brickwork inspection well, near the well wall where the hole is to be opened, lay a steel mesh parallel to the well wall;

[0018] Step 2.2, reliably welding the top and bottom of the steel mesh to the top plate steel bars and bottom plate steel bars of the existing brick inspection well respectively;

[0019] Step 2.3: spraying polymer mortar on the steel mesh to form the temporary blocking structure.

[0020] Preferably, in step 3, a hole is first opened in the existing brick inspection well;

[0021] The size of the opening meets the requirements of the guide drill bit and the guide drill rod of the micro-jacking pipe for entering the hole;

[0022] Then, the guide drill bit and the guide drill rod of the micro-jacking pipe are pushed to the designed depth, and after penetrating the well wall to be drilled, the micro-jacking front pipe is pushed in;

[0023] In step 4, the micro-top front guide tube is used as a guide to connect the reducer and the 220 transition tube to expand the diameter;

[0024] After the diameter expansion is completed, the spiral tube is pushed into the 220 transition tube, and then the hole is expanded using a micro-jacking machine, and the spiral tube is pushed into the designated position.

[0025] More preferably, when the guide drill bit and the guide drill rod reach the edge of the existing brick inspection well, temporary diversion measures are added in the existing brick inspection well to ensure that the existing brick inspection well is in a dry state.

[0026] Preferably, in step 3, a hole is first opened in the existing brick inspection well;

[0027] The size of the opening meets the requirements of the micro-jacking tool pipe, micro-jacking reaming head or transition pipe for entering the hole;

[0028] Using a hydraulic device to push the micro-top front guide tube into place according to the designed trajectory, then replacing the micro-top front guide tube with the tool tube, and connecting a reaming cutting head to the end of the tool tube;

[0029] In step 4, the reaming cutting head is used to perform reaming and jacking, and the pipeline to be laid is jacked to a designated position, thereby completing the construction of the micro-pipe jacking.

[0030] Preferably, after the existing brick-built inspection well is opened, a reinforcement scheme of injecting polyurethane under high pressure from the inner wall of the well is adopted to address the water seepage situation on the outside of the existing brick-built inspection well, and utilizing the expansion and curing characteristics of the polyurethane material to form a temporary waterproof sealing layer in the gaps in the well wall.

[0031] Preferably, after all the construction is completed, the length of the pipe section of the micro-jacking pipe located in the existing brick-built inspection well is not less than 15 cm, and waterproof glue or waterproof mortar is injected between the pipe section and the opening of the existing brick-built inspection well.

[0032] Preferably, after all the construction is completed, the flow channel and bottom plate structure of the existing brick inspection well are used to construct a reinforcement structure along the wall of the existing brick inspection well, and 20mm thick polymer mortar is sprayed from the bottom plate structure upwards on the inside of the entire brick well.

[0033] Beneficial effects of the present invention:

[0034] The present invention can ensure the safety of brick-built inspection wells during the drilling process, while guaranteeing their durability in long-term use. It not only improves the construction safety and connection stability of the inspection wells and new pipelines, but also effectively reduces the impact of construction on the surrounding environment, thereby providing a practical solution for the sustainable development of urban infrastructure.

[0035] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic plan view showing an embodiment of the present invention.

[0037] Figure 2 A schematic diagram showing the state of step 1 in an embodiment of the present invention is shown.

[0038] Figure 3 A schematic diagram showing the state of step 2 in an embodiment of the present invention is shown.

[0039] Figure 4 A state diagram of step 3 according to an embodiment of the present invention is shown.

[0040] Figure 5 A state diagram of step 4 in an embodiment of the present invention is shown.

[0041] Figure 6 A state diagram of step 5 in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0042] Example

[0043] like Figures 1 to 6 As shown, the micro-jacking method for single-side access to an existing brick inspection well is used to open a hole in the side wall of an existing brick inspection well 1 with an existing pipeline 2 through a micro-jacking pipe 3, including the following steps:

[0044] Step 1: Construction preparation: Reinforce the soil outside the well wall to be opened; Use MJS to reinforce the soil outside the well wall to form a reinforcement body 10; Fill the interface between the well wall to be opened and the soil with polyurethane material 4 surrounding the opening;

[0045] Step 2: A temporary blocking structure 5 is set in the existing brick inspection well 1 to temporarily block the well wall to be opened;

[0046] The temporary blocking structure 5 leaves a hole approximately equal to the size of the micro-jacking pipe 3;

[0047] Step 3: Push forward along the established route, push the micro-jacking front conduit 6 of the micro-jacking pipe 3, so that the micro-jacking front conduit 6 enters the existing brick inspection well 1 by at least 150 mm, and temporarily seal the opening position with polyurethane material;

[0048] Step 4: Push the micro-jacking pipe 3 into the inside of the existing brick inspection well 1 by at least 150 mm, and fill the gap between the pipe section 7 of the micro-jacking pipe 3 and the opening with dense waterproof glue or waterproof mortar 8 to form a permanent seal;

[0049] Step 5: Connect the micro-jacking pipe 3 to the existing brick inspection well 1, and spray polymer mortar 9 on the inner wall of the existing brick inspection well 1 after completion.

[0050] The present invention uses micro-jacking pipe 3 to construct new pipelines, which can not only improve the construction safety and connection stability of inspection wells and new pipelines, but also effectively reduce the impact of construction on the surrounding environment, providing a practical solution for the sustainable development of urban infrastructure.

[0051] In some embodiments, before executing step 1, it is also necessary to verify the structural integrity of the existing brick inspection well to check whether the existing brick inspection well has damage such as cracks and spalling, and to evaluate the ability of the existing brick inspection well to resist the infiltration of sewage or rainwater in long-term use;

[0052] The purpose of verifying the structural integrity of the existing brick inspection well is to ensure the stability and bearing capacity of its overall structure, to evaluate the ability of the existing brick inspection well to resist the infiltration of sewage or rainwater during long-term use, and to determine whether the existing brick inspection well will pollute the environment and have adverse effects on groundwater.

[0053] If there are structural safety problems with the existing brick-built inspection well, the centrifugal spraying method of the well inner wall mortar is used for repair. The high molecular polymer anti-corrosion mortar is sprayed on the inner wall of the existing brick-built inspection well and solidified to form a durable and anti-corrosion coating.

[0054] In practice, brick-built inspection wells are subject to external traffic loads, groundwater pressure, and erosion from sewage and waste gas, which can lead to structural damage, causing groundwater leakage and sewage overflow, and even causing surrounding road collapse. Therefore, a centrifugal spraying method for well inner wall mortar repair is used. This method sprays a high-molecular-weight polymer anti-corrosion mortar onto the inner wall of the inspection well and cures it to effectively improve its durability and corrosion resistance.

[0055] In some embodiments, in step 1 , the reinforcement body 10 is extended to a range of 2 to 3 meters outside the outline of the existing brick inspection shaft 1 .

[0056] Extending the reinforcement to a range of 2 to 3 meters outside the outline of the existing brick inspection well can reduce the stress on the well wall of the existing brick inspection well on the side where the micro-jacking pipe is to be inserted.

[0057] In certain embodiments, step 2 is as follows:

[0058] Step 2.1: In the existing brick inspection well 1, near the well wall where the hole is to be opened, lay a steel mesh parallel to the well wall;

[0059] Step 2.2: Reliably weld the top and bottom of the steel mesh to the top and bottom plate steel bars of the existing brick inspection well 1;

[0060] Step 2.3: spraying polymer mortar on the steel mesh to form a temporary sealing structure 5.

[0061] In some embodiments, in step 3, a hole is first opened in the existing brick inspection well 1;

[0062] The size of the hole is sufficient for the guide drill bit and guide drill rod of the micro jacking pipe 3 to enter the hole;

[0063] Then, the guide drill bit and guide drill rod of the micro-jacking pipe 3 are pushed to the designed depth, and after penetrating the well wall to be drilled, the micro-jacking front guide pipe 6 is pushed in;

[0064] In step 4, the micro-top front guide tube 6 is used as a guide, and the reducer and 220 transition tube are connected, and then the diameter is expanded;

[0065] After the diameter expansion is completed, push the spiral tube into the 220 transition tube, use the micro-jacking machine to expand the hole, and push the spiral tube into the designated position.

[0066] In some embodiments, when the guide drill bit and the guide drill rod reach the edge of the existing brick inspection well 1, temporary diversion measures are added in the existing brick inspection well 1 to ensure that the existing brick inspection well 1 is in a dry state.

[0067] In some embodiments, in step 3, a hole is first opened in the existing brick inspection well 1;

[0068] The size of the opening meets the requirements of the micro-jacking tool tube, micro-jacking reamer head or transition pipe;

[0069] Use a hydraulic device to push the micro-top front guide tube 6 into place according to the designed trajectory, then replace the micro-top front guide tube 6 with a tool tube, and connect the reaming cutting head to the end of the tool tube;

[0070] In step 4, the reaming cutting head is used to perform jacking to push the planned pipe to the designated position, thus completing the construction of the micro-pipe jacking 3.

[0071] In some embodiments, after the existing brick-built inspection well 1 is opened, a reinforcement scheme is adopted to inject polyurethane at high pressure from the inner wall of the well to address the water seepage situation on the outside of the existing brick-built inspection well 1. The expansion and curing properties of the polyurethane material are used to form a temporary waterproof sealing layer in the gap of the hole in the well wall.

[0072] In some embodiments, after all construction is completed, the length of the pipe section 7 of the micro-jacking pipe 3 located in the existing brick-built inspection well 1 is not less than 15 cm, and waterproof glue or waterproof mortar 8 is injected between the opening of the existing brick-built inspection well 1.

[0073] In some embodiments, after all construction is completed, the flow channel and bottom plate structure of the existing brick inspection well 1 are used to construct a reinforcement structure along the wall of the existing brick inspection well, and 20 mm thick polymer mortar is sprayed from the bottom plate structure upwards on the inside of the entire brick well.

[0074] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A micro-jacking pipe method for single-side access to an existing brickwork inspection well to open a hole and reinforce the existing brickwork inspection well, which is used to open a hole in the side wall of an existing brickwork inspection well (1) with an existing pipeline (2) through a micro-jacking pipe (3); characterized in that: The steps include: Step 1, construction preparation, reinforcing the soil outside the well wall to be opened; using MJS to reinforce the soil outside the well wall to form a reinforcement body (10); filling the interface between the well wall to be opened and the soil with a polyurethane material (4) surrounding the opening; Step 2: a temporary blocking structure (5) is provided in the existing brickwork inspection well (1) to temporarily block the well wall to be opened; The temporary blocking structure (5) leaves approximately the same opening as the micro-jacking pipe (3); Step 3, jacking in accordance with the established route, micro-jacking the micro-jacking front conduit (6) of the micro-jacking pipe (3), so that the micro-jacking front conduit (6) enters the existing brick inspection well (1) by at least 150 mm, and temporarily plugging the opening position with polyurethane material; Step 4: Push the micro-jacking pipe (3) into the inner side of the existing brick-built inspection well (1) by at least 150 mm, and fill the gap between the pipe section (7) of the micro-jacking pipe (3) and the opening with dense waterproof glue or waterproof mortar (8) to form a permanent seal; Step 5: The micro-jacking pipe (3) is connected to the existing brick-built inspection well (1), and after completion, polymer mortar (9) is sprayed on the inner wall of the existing brick-built inspection well (1).

2. The micro-pipe jacking method for single-side access to an existing brick-built inspection well according to claim 1 is characterized in that: Before executing step 1, it is also necessary to verify the structural integrity of the existing brick inspection well to check whether the existing brick inspection well has any damage including cracks and peeling, and to evaluate the ability of the existing brick inspection well to resist the penetration of sewage or rainwater in long-term use; if the existing brick inspection well has structural safety problems, the well inner wall mortar centrifugal spraying method is used for repair, by spraying high molecular polymer anti-corrosion mortar on the inner wall of the existing brick inspection well and curing it to form a durable and anti-corrosion coating.

3. The micro-pipe jacking method for single-side access to an existing brick-built inspection well according to claim 1 is characterized in that: In step 1, the reinforcement body (10) is extended to a range of 2 to 3 meters outside the outline of the existing brick inspection well (1).

4. The micro-pipe jacking method for single-side access to an existing brickwork inspection well according to claim 1 is characterized in that: Step 2 is as follows: Step 2.1, in the existing brick inspection well (1), near the well wall where the hole is to be opened, laying a steel mesh parallel to the well wall where the hole is to be opened; Step 2.2, reliably welding the top and bottom of the steel mesh to the top plate steel bars and bottom plate steel bars of the existing brick inspection well (1); Step 2.3: spraying polymer mortar on the steel mesh to form the temporary blocking structure (5).

5. The micro-pipe jacking method for single-side access to an existing brickwork inspection well according to claim 1 is characterized in that: In step 3, a hole is first opened in the existing brick inspection well (1); The size of the opening meets the requirements of the guide drill bit and the guide drill rod of the micro jacking pipe (3) for entering the hole; Then, the guide drill bit and the guide drill rod of the micro-jacking pipe (3) are pushed to the designed depth, and after penetrating the well wall to be drilled, the micro-jacking front guide pipe (6) is pushed in; In step 4, the micro-top front conduit (6) is used as a guide to connect the reducer and the 220 transition pipe to expand the diameter; After the diameter expansion is completed, the spiral tube is pushed into the 220 transition tube, and then the hole is expanded using a micro-jacking machine, and the spiral tube is pushed into the designated position.

6. The micro-pipe jacking method for single-side access to an existing brickwork inspection well according to claim 5 is characterized in that: When the guide drill bit and the guide drill rod reach the edge of the existing brick-built inspection well (1), temporary diversion measures are added in the existing brick-built inspection well (1) to ensure that the existing brick-built inspection well (1) is in a dry state.

7. The micro-pipe jacking method for single-side access to an existing brickwork inspection well according to claim 1 is characterized in that: In step 3, a hole is first opened in the existing brick inspection well (1); The size of the opening meets the requirements of the micro-jacking tool pipe, micro-jacking reaming head or transition pipe for entering the hole; Using a hydraulic device to push the micro-top front conduit (6) into position according to the designed trajectory, then replacing the micro-top front conduit (6) with the tool tube, and connecting a reaming cutting head to the end of the tool tube; In step 4, the reaming cutting head is used to carry out reaming and jacking, and the pipeline to be laid is jacked to a designated position, thereby completing the construction of the micro-jacking pipe (3).

8. The micro-pipe jacking method for single-side access to an existing brickwork inspection well according to claim 1 is characterized in that: After the existing brickwork inspection well (1) is opened, in response to the water seepage outside the existing brickwork inspection well (1), a reinforcement scheme is adopted in which polyurethane is injected at high pressure from the inner wall of the well wall, and a temporary waterproof sealing layer is formed in the gap of the well wall opening by utilizing the expansion and curing characteristics of the polyurethane material.

9. The micro-pipe jacking method for single-side access to an existing brickwork inspection well according to claim 1 is characterized in that: After all the construction is completed, the length of the pipe section (7) of the micro-jacking pipe (3) located in the existing brick inspection well (1) is not less than 15 cm, and waterproof glue or waterproof mortar (8) is injected between the opening of the existing brick inspection well (1).

10. The micro-pipe jacking method for single-side access to an existing brickwork inspection well as claimed in claim 1 is characterized in that: After all the construction is completed, the flow channel and bottom plate structure of the existing brick-built inspection well (1) are used to construct a reinforcement structure along the wall of the existing brick-built inspection well, and a 20mm thick polymer mortar is sprayed from the bottom plate structure upwards to the inside of the entire brick-built well.

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