Full water tank culvert modification butt joint box culvert and construction method thereof

Abstract

The application relates to a full-water box culvert relocation butt joint box culvert and a construction method thereof, the full-water box culvert relocation butt joint box culvert comprises a U-shaped steel sleeve box, a row hole, a ring beam, a new box culvert, an old box culvert and a manhole shaft; the full-water box culvert relocation butt joint box culvert construction method comprises the following steps: step 1, simultaneously increasing the height of the ring beam on the top plate of the old box culvert, and connecting the ring beam with the old box culvert through anchoring; step 2, performing steps such as manufacturing the new box culvert according to design requirements; the superior effects of the application are as follows: the butt joint box culvert adopts the U-shaped steel sleeve box to block the water flow of the box culvert, the recycling rate is high, the steel plate has high rigidity, the stability of the weir body is guaranteed, the construction period is shortened, and the cost is saved; the full-water box culvert relocation butt joint box culvert construction method realizes cutting of the top plate and the side wall of the box culvert under dry operation conditions for butt joint, uses the U-shaped steel sleeve box as a temporary cofferdam in the box culvert, realizes rapid installation and removal, avoids safety risks caused by artificial sandbag cofferdam stacking and underwater artificial removal.

Description

Technical Field

[0001] This patent application relates to the field of drainage culvert relocation construction, specifically to a method for relocating and connecting a full-water culvert to a connecting culvert. Background Technology

[0002] In recent years, with the continuous development of urban construction in China, drainage box culverts have been widely adopted by municipal governments due to their numerous advantages, such as large structural size, good cast-in-place durability, strong structural integrity, and high structural bearing capacity. As the number of box culverts increases, it becomes inevitable to connect multiple drainage networks or relocate them due to route changes. Many drainage box culverts are saturated with water, and during relocation and connection, the drainage flow velocity and water head pressure can prevent successful connection.

[0003] In existing publicly available application documents, Chinese invention patent application number CN202211316840.X discloses a connection node and construction method for new and old intake culverts; it includes an old intake culvert and a new intake culvert; one end of the new intake culvert is connected to the side wall of the old intake culvert, and this end includes a permanent culvert and a temporary diversion culvert; the permanent culvert and the old intake culvert are connected to form a corner area; the temporary diversion culvert is connected to the old intake culvert upstream of the corner area, and during the connection construction of the permanent culvert and the old intake culvert, the water passages in the new intake culvert and the old intake culvert are connected to divert water, so that the connection construction between the permanent culvert and the old intake culvert can be completed under dry working conditions. The application of this invention allows the construction of the connection node between the new and old intake culverts to be carried out without water interruption or long-distance diversion, resulting in a shorter culvert renovation cycle and lower costs; it also has less impact on traffic and the surrounding environment, thus mitigating social conflicts.

[0004] For example, Chinese invention patent application number CN202211317124.3 discloses a rapid connection node and construction method for new and old intake box culverts. The end of the new intake box culvert is connected to the side wall of the old intake box culvert and is connected to the old intake box culvert through a precast box culvert. One end of the precast box culvert is pushed in from the end of the new intake box culvert and passes through the side wall of the old intake box culvert before entering the old intake box culvert. The outer wall of the precast box culvert is filled with concrete to seal the gap between the new and the inner walls of the old and new intake box culverts. During construction, the new intake box culvert is first built on one side of the old intake box culvert. Sandbags are set up in the old intake box culvert to form a waterless jacking construction area. Then, the side wall corresponding to the jacking of the precast box culvert is chiseled open to form a gap. Then, the precast box culvert is pushed into the old intake box culvert through jacking in the new intake box culvert. Finally, after filling with concrete to seal the gap, the sandbag cofferdam is removed and the foundation pit is backfilled with soil. This invention eliminates the need for water outages and long-distance diversion when connecting new and old inlet culverts, shortening the renovation cycle and reducing costs.

[0005] For example, Chinese invention patent application CN202311142019.5 discloses a pipeline relocation structure and its construction method. The pipeline relocation structure includes a first conversion well, a second conversion well, an old pipe, and a new pipe. Both the first and second conversion wells are equipped with partition walls. The partition walls divide the first conversion well into a first sealing chamber and a first water-passing culvert, and the second conversion well into a second sealing chamber and a second water-passing culvert. The first end of the new pipe is connected to the first water-passing culvert, and the second end is connected to the second water-passing culvert. During the relocation of the old pipe, the old pipe in the first and second conversion wells is cut off, and then the first and second sealing chambers are sealed. This allows water in the pipeline to flow only into the new pipe through the first water-passing culvert. Water in the new pipe then flows into the second water-passing culvert and finally into the downstream pipeline. With this structure, underground drainage pipelines can be relocated without interrupting water supply, avoiding large-scale and prolonged water outages and not affecting normal production and daily life. Summary of the Invention

[0006] The purpose of this invention is to overcome the deficiencies in the prior art and provide a method for relocating and connecting full-water box culverts and their construction.

[0007] The relocation and connection of the full-water box culvert includes: a U-shaped steel casing, drainage holes, a ring beam, a new box culvert, an old box culvert, and a manhole. The ring beam is set in the middle of the old box culvert, the new box culvert is set on the side wall of the old box culvert, the U-shaped steel casing is set at the joint between the old and new box culverts, the side wall of the U-shaped steel casing is provided with several drainage holes, and the manhole is set at the top opening of the new and old box culverts.

[0008] Furthermore, the length, width, and thickness of the U-shaped steel casing are 3000mm × 1000mm × 20mm, respectively.

[0009] Furthermore, the diameter of the perforation is 80mm-100mm.

[0010] Furthermore, a water-swellable sealing strip is installed on the surface of the old box culvert sidewall where it connects with the new box culvert.

[0011] Furthermore, a lifting hole with a diameter of 100mm is provided on the upper part of the rear wall of the steel casing.

[0012] Furthermore, triangular blocks supporting the upper and lower parts of the two side walls of the steel casing are provided to increase the connection rigidity of the two side walls.

[0013] Furthermore, the length, width, and thickness of the triangular block are 500mm × 500mm × 20mm, respectively.

[0014] The present invention further provides a construction method for relocating and connecting the full-water culvert, comprising the following steps:

[0015] Step 1: Simultaneously increase the height of the ring beam on the top slab of the old box culvert, and connect the ring beam with the old box culvert by rebar installation;

[0016] Step 2: Construct the new box culvert according to the design requirements;

[0017] Step 3: Construct inspection wells on the upper part of the top slabs of the new and old box culverts;

[0018] Step 4: Construct the drainage holes and hoisting holes on the top slab of the old box culvert inside the inspection well.

[0019] Step 5: Fabricate and install the U-shaped steel cofferdam;

[0020] Step 6: Use a water pump to remove the water accumulated inside the steel cofferdam;

[0021] Step 7: At the joint between the new and old box culverts, perform hole-laying operations along the junction of the side wall and bottom slab of the old box culvert, remove the concrete of the side wall of the old box culvert structure, and lift out the inspection well.

[0022] Furthermore, in step 1, the height of the ring beam on the top slab of the old box culvert is increased by 80-100cm. The ring beam and the old box culvert are connected by C25HRB400 rebar, with the rebar anchored to a depth of 15d and a spacing of 20cm. The height of the ring beam on the top slab of the old box culvert is increased simultaneously to prevent water from overflowing when the sidewalls of the old box culvert are demolished.

[0023] Furthermore, in step 2, the new box culvert structure is constructed according to the design requirements, including:

[0024] Step 2.1 The bottom slab and side walls of the new box culvert and the old box culvert are connected by C25HRB400 rebars, with an anchoring depth of 15d and a spacing of 20cm.

[0025] Step 2.2 Reserve a space of 0.8-1.2m on the top slab of the new box culvert and the old box culvert as a space for cutting the side wall of the old box culvert, and carry out cutting of the side wall of the old box culvert;

[0026] Step 2.3 Roughen the surface of the joint between the new and old box culverts. The surface of the joint is roughened to increase the contact area for subsequent construction and improve stability and firmness.

[0027] Step 2.4 Apply cement-based penetrating crystalline waterproof coating to the surface of the joint area, using 1.5 kg / m².

[0028] Step 2.5 Install water-swellable sealing strips on the surface of the mating area. The preferred water-swellable sealing strips are putty-type water-swellable sealing strips or BW water-swellable sealing strips.

[0029] Furthermore, in step 3, inspection wells are constructed on the upper part of the top slab of both the new and old box culverts, including:

[0030] Step 3.1 To facilitate future maintenance and cleaning, a manhole needs to be constructed at the connection point between the new and old box culverts, according to design and specification requirements. The height of the manhole structure should be greater than the highest water level of the old box culvert during the high-water season.

[0031] Step 3.2 The concrete structure of the inspection well is located above the top slab of the new box culvert and the old box culvert, connected to the steel reinforcement of the new box culvert, and connected to the ring beam on the top slab of the old box culvert.

[0032] Furthermore, in step 4, the drainage holes and hoisting holes on the top slab of the old box culvert inside the inspection well are constructed, including:

[0033] Step 4.1 Use a Ф100mm water drill to drill through the top plate structure at the middle of the old box culvert top plate inside the inspection well for hoisting the old box culvert top plate.

[0034] Step 4.2 Use a Ф80mm-100mm water drill to create holes along the old culvert top slab inside the inspection well and the side wall of the well to separate them. Then use the lifting holes to move the separated pieces of the old culvert top slab out of the inspection well.

[0035] Furthermore, in step 5, a 30mm thick U-shaped steel cofferdam is constructed and installed, including:

[0036] Step 5.1 Use a circular saw to cut the top slab of the old box culvert inside the inspection well and lift it out. Process a U-shaped steel cofferdam according to the dimensions of the cut top slab of the old box culvert. Hoist the processed U-shaped steel cofferdam to the opening of the top slab of the old box culvert to form a U-shaped steel cofferdam to block the water flow in the old box culvert and facilitate the removal of the side wall of the connection structure between the new and old box culverts;

[0037] Step 5.2 Sandbags are stacked at the contact joint between the U-shaped steel caisson and the old culvert structure to stop the water flow and form a U-shaped steel caisson cofferdam.

[0038] Furthermore, in step 6, a water pump is used to remove the water accumulated inside the steel cofferdam:

[0039] To ensure waterless operation during the connection construction of the new and old box culverts, a water pump needs to be installed inside the U-shaped steel caisson to continuously pump out the water accumulated inside the cofferdam of the U-shaped steel caisson, thus ensuring waterless operation during the connection construction of the side walls of the new and old box culverts.

[0040] Furthermore, in step 7, at the joint between the new and old box culverts, along the junction of the side walls and the bottom slab, a water drill is used to create holes, the concrete of the side walls of the old box culvert structure is removed and hoisted out, the new box culvert and the old box culvert structure are connected in the inspection well, the U-shaped steel casing is hoisted out, the sewage in the old box culvert is smoothly diverted to the new box culvert, and finally the precast cover plate on the top of the inspection well is installed.

[0041] Compared with existing technologies in this field, the relocation and connection method of the full-water box culvert described in this invention has the following superior technical effects:

[0042] 1. The relocation and docking method of the full-water box culvert described in this invention enables the cutting of the top slab and side walls of the box culvert for docking under dry operation conditions, and the use of U-shaped steel cascades as temporary cofferdams inside the box culvert for rapid installation and dismantling, avoiding the safety risks of siltation caused by manually stacking sandbag cofferdams and underwater manual dismantling.

[0043] 2. The relocation and connection of the full-water box culvert and its construction method described in this invention uses a water drill in conjunction with a circular saw for cutting. Compared with the traditional manual or mechanical demolition of the water box culvert, this reduces the environmental pollution around the construction site. Moreover, after demolition, the concrete slab is moved as a whole to prevent concrete debris from falling into the box culvert and blocking the water flow.

[0044] 3. The relocation and connection of the full-water box culvert and its construction method described in this invention uses a U-shaped steel casing to block the water flow of the box culvert. It is easy to process, has a high rate of recycling and reuse, and the steel plate has high rigidity, which ensures the stability of the weir.

[0045] 4. The U-shaped steel caisson used in the construction method for relocating and connecting full-water culverts described in this invention can be reused, which can shorten the construction period and save costs. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the relocation and connection structure of the full-water box culvert.

[0047] Figure 2 This is a schematic diagram of the cross-sectional structure of the relocated and connected box culvert for the full-water box culvert.

[0048] Figure 3 This is a schematic diagram of the three-dimensional structure of the U-shaped steel casing of the relocated and connected box culvert for the full-water box culvert. Detailed Implementation

[0049] Now, in conjunction with the instruction manual appendix Figure 1-3 This invention provides a detailed description of specific embodiments of the relocation and connection of the full-water box culvert and its construction method.

[0050] like Figure 1-3 As shown, the relocation and connection of the full-water box culvert includes: a U-shaped steel casing 1, an A100mm water drill hole 2, a ring beam 3, a new box culvert 4, an old box culvert 5, and a manhole 6. The ring beam 3 is set in the middle of the old box culvert 5, the new box culvert 4 is set on the side wall of the old box culvert 5, the U-shaped steel casing 1 is set at the joint between the old box culvert 5 and the new box culvert 4, the side wall of the U-shaped steel casing 1 is provided with several drainage holes 2, and the manhole 6 is set at the top opening of the new box culvert and the old box culvert.

[0051] Furthermore, the length, width, and thickness of the U-shaped steel casing 1 are 3000mm*1000mm and 20mm, respectively.

[0052] Furthermore, the diameter of the hole 2 is 80mm-100mm.

[0053] Furthermore, water-swellable sealing strips are installed on the surface of the joint between the old box culvert 5 and the new box culvert 4.

[0054] Furthermore, a lifting hole 7 is provided on the upper part of the rear wall of the steel casing 1, and the diameter of the lifting hole 7 is 100mm.

[0055] Furthermore, triangular blocks 8 are provided on the upper and lower parts of the two side walls of the steel casing 1 to support the two side walls, so as to increase the connection rigidity of the two side walls.

[0056] Furthermore, the length, width, and thickness of triangle 8 are 500mm × 500mm × 20mm, respectively.

[0057] The construction method for relocating and connecting full-water box culverts according to the present invention includes the following steps:

[0058] The construction method for relocating and connecting full-water box culverts includes the following steps:

[0059] Step 1: Simultaneously increase the height of the ring beam on the top slab of the old box culvert, and connect the ring beam to the old box culvert with rebar.

[0060] The height of the ring beam on the top slab of the old box culvert is increased to 80-100cm. The ring beam and the old box culvert are connected by C25HRB400 rebar, with the rebar anchored to a depth of 15d (rebar diameter) and a spacing of 20cm.

[0061] Step 2: Construct the new box culvert according to the design requirements:

[0062] Step 2.1 The bottom slab and side walls of the new box culvert and the old box culvert are connected by C25HRB400 rebars. The anchoring depth of the rebars is 15d and the spacing is 20cm.

[0063] Step 2.2 Reserve a space of 0.8-1.2m on the top slab of the new box culvert and the old box culvert as a space for cutting the side wall of the old box culvert, and carry out cutting of the side wall of the old box culvert;

[0064] Step 2.3 Roughen the surface of the joint between the new and old box culverts. The surface of the joint is roughened to increase the contact area for subsequent construction and improve stability and firmness.

[0065] Step 2.4 Apply cement-based penetrating crystalline waterproof coating to the surface of the joint area. The dosage of cement-based penetrating crystalline waterproof coating is 1.5 kg / m².

[0066] Step 2.5 Install water-swellable sealing strips on the surface of the joint. The preferred water-swellable sealing strips are putty-type water-swellable sealing strips or BW water-swellable sealing strips.

[0067] Step 3: Construct inspection wells on the upper part of the top slabs of both the new and old box culverts.

[0068] Step 3.1 To facilitate future maintenance and cleaning, a manhole needs to be constructed at the connection point between the new and old box culverts, according to design and specification requirements. The height of the manhole structure should be greater than the highest water level of the old box culvert during the high-water season.

[0069] Step 3.2 The concrete structure of the inspection well is located above the top slab of the new box culvert and the old box culvert, connected to the steel reinforcement of the new box culvert, and connected to the ring beam on the top slab of the old box culvert;

[0070] Step 4: Construct the drainage holes and lifting holes on the top slab of the old box culvert inside the inspection well:

[0071] Step 5: Fabricate and install the U-shaped steel cofferdam:

[0072] Step 5.1 In order to ensure waterless operation during the construction of the connection between the new box culvert and the old box culvert structure, a water pump needs to be installed inside the U-shaped steel caisson to continuously pump out the water accumulated in the cofferdam of the U-shaped steel caisson, so as to ensure waterless operation during the construction of the connection between the side walls of the new box culvert and the old box culvert.

[0073] Step 5.2 Use a circular saw to cut the top slab of the old box culvert inside the inspection well and lift it out. Process a U-shaped steel cofferdam according to the dimensions of the cut top slab of the old box culvert. Hoist the processed U-shaped steel cofferdam to the opening of the top slab of the old box culvert to form a U-shaped steel cofferdam to block the water flow in the old box culvert and facilitate the removal of the side wall of the connecting structure between the new and old box culverts;

[0074] Step 5.3 Stack sandbags at the contact joint between the U-shaped steel caisson and the old box culvert structure to stop the water flow and form a U-shaped steel caisson cofferdam;

[0075] Step 6: Use a water pump to remove the water accumulated inside the steel cofferdam.

[0076] To ensure waterless operation during the connection construction of the new and old box culverts, a water pump needs to be installed inside the U-shaped steel cofferdam to continuously pump out the water accumulated inside the cofferdam, thus ensuring waterless operation during the connection construction of the side walls of the new and old box culverts.

[0077] Step 7: At the joint between the new and old box culverts, drilling operations are carried out along the junction of the side wall and bottom slab of the old box culvert. Water drills are used for drilling operations. The concrete of the side wall of the old box culvert structure is removed and hoisted out. The connection between the new and old box culvert structures in the inspection well is completed. The U-shaped steel casing is hoisted out, and the sewage in the old box culvert is smoothly diverted into the new box culvert. Finally, the precast cover plate on the top of the inspection well is installed.

[0078] In this embodiment, in step 4, at the box culvert joint, hole-laying operations are carried out along the junction of the side wall and the bottom plate, the reinforced concrete blocks are removed in batches, the U-shaped steel caisson is hoisted out, the inspection well is constructed, and the upper cover plate of the ring beam of the new box culvert and the old box culvert is sealed.

[0079] In this embodiment, in step 5, the U-shaped steel cofferdam is 30mm thick to ensure the safety of the U-shaped steel cofferdam.

[0080] In this embodiment, in step 6, a water pump is used to pump out the water accumulated inside the steel cofferdam.

[0081] This invention is not limited to the above-described embodiments. Any modifications, improvements, or substitutions that can be conceived by those skilled in the art without departing from the essential content of this invention fall within the protection scope of this invention.

Claims

1. A method for relocating and connecting a full-water box culvert to another box culvert, characterized in that, include: U-shaped steel caisson, perforations, ring beam, new box culvert, old box culvert, inspection well. The old box culvert is equipped with a ring beam in the middle, the new box culvert is installed on the side wall of the old box culvert, and a U-shaped steel caisson is installed at the joint between the old and new box culverts. Several perforations are set on the side wall of the U-shaped steel caisson, and the inspection well is set at the top opening of the new and old box culverts. The concrete structure of the inspection well is located above the top slabs of the new and old box culverts and is connected to the ring beam on the top slab of the old box culvert. Sandbags are stacked at the contact joint between the U-shaped steel casing and the old box culvert structure to stop water. Water-swellable waterstop strips are installed on the surface of the old box culvert sidewalls where they meet the new box culvert. The ring beam is connected to the old box culvert with rebar, and the height of the ring beam on the top slab of the old box culvert is increased simultaneously to prevent water from overflowing when the sidewalls of the old box culvert are demolished. Triangular blocks are installed on the upper and lower parts of the two side walls of the steel casing to increase the connection rigidity of the two side walls. The length, width and thickness of the triangular blocks are 500mm×500mm×20mm respectively.

2. The relocation and docking box culvert for a full-water box culvert as described in claim 1, characterized in that, The upper part of the rear wall of the U-shaped steel casing is provided with a lifting hole with a diameter of 80mm-100mm.

3. The relocation and docking box culvert for a full-water box culvert as described in claim 1, characterized in that, The diameter of the perforated holes is 100mm.

4. The relocation and docking box culvert for a full-water box culvert as described in claim 1, characterized in that, The length, width, and thickness of the U-shaped steel casing are 3000mm × 1000mm × 20mm, respectively.

5. A construction method for relocating and connecting a full-water box culvert to a connecting box culvert as described in claim 1, characterized in that, Includes the following steps: Step 1: Simultaneously increase the height of the ring beam on the top slab of the old box culvert, and connect the ring beam with the old box culvert by rebar installation; Step 2: Construct the new box culvert according to the design requirements: Step 2.1 The bottom slab and side walls of the new box culvert and the old box culvert are connected by C25HRB400 rebar, with the rebar anchored to a depth of 15d and a spacing of 20cm. Step 2.2 Reserve a space of 0.8-1.2m in the top slab of the new box culvert and the old box culvert as the cutting space for the side wall of the old box culvert, and carry out the cutting of the side wall of the old box culvert; Step 2.3 Roughen the surface of the joint between the new and old box culverts. The surface of the joint is roughened to increase the contact area for subsequent construction and improve stability and firmness. Step 2.4 Apply cement-based penetrating crystalline waterproof coating to the surface of the joint area, using 1.5 kg / m². Step 2.5 Install a water-swellable waterproofing strip on the surface of the mating area. The water-swellable waterproofing strip installed is either a putty-type water-swellable waterproofing strip or a BW water-swellable waterproofing strip. Step 3: Construct inspection wells on the upper part of the top slabs of both the new and old box culverts. Step 3.1 To facilitate future maintenance and cleaning, a manhole needs to be constructed at the junction of the new and old box culverts, according to design and specification requirements. The height of the manhole structure should be greater than the highest water level of the old box culvert during the high-water season. Step 3.2 The concrete structure of the inspection well is located above the top slab of the new box culvert and the old box culvert, connected to the steel reinforcement of the new box culvert, and connected to the ring beam on the top slab of the old box culvert; Step 4: Construct the drainage holes and lifting holes on the top slab of the old box culvert inside the inspection well: Step 4.1 Use a Ф100mm water drill to drill through the top plate structure in the middle of the old box culvert top plate inside the inspection well for hoisting the old box culvert top plate; Step 4.2 Use a Ф80mm-100mm water drill to create holes along the old culvert top slab and the side wall of the manhole to separate them. Then use the lifting holes to move the separated pieces of the old culvert top slab out of the manhole. Step 5: Construct and install a 30mm thick U-shaped steel cofferdam; Step 5.1 Use a circular saw to cut the top slab of the old box culvert inside the inspection well and lift it out. Process a U-shaped steel box according to the size of the cut top slab of the old box culvert. Hoist the processed U-shaped steel box to the opening of the top slab of the old box culvert to form a U-shaped steel box cofferdam to block the water flow in the old box culvert and facilitate the demolition of the side wall of the connection structure between the new and old box culverts. Step 5.2 Stack sandbags at the contact joint between the U-shaped steel caisson and the old box culvert structure to stop the water flow and form a U-shaped steel caisson cofferdam; Step 6: Use a water pump to remove the water accumulated inside the steel cofferdam. To ensure waterless operation during the connection construction of the new and old box culverts, a water pump needs to be installed inside the U-shaped steel cofferdam to continuously pump out the water accumulated inside the cofferdam, thus ensuring waterless operation during the connection construction of the side walls of the new and old box culverts. Step 7: At the joint between the new and old box culverts, along the junction of the side wall and bottom slab of the old box culvert, use a water drill to create holes, remove the concrete of the side wall of the old box culvert structure and hoist it out: First, the connection between the new and old box culvert structures in the inspection well is completed, and the U-shaped steel casing is hoisted out; Second, the sewage in the old box culvert is smoothly diverted into the new box culvert; Third, the precast cover plate on the top of the inspection well is installed.

6. The construction method according to claim 5, characterized in that, In step 1, the height of the ring beam on the top slab of the old box culvert is increased by 80-100cm. The ring beam and the old box culvert are connected by C25HRB400 rebar, with the rebar anchored to a depth of 15d and a spacing of 20cm.

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