A construction method for replacing the bottom plate partition of a ship lock chamber

Abstract

As a special-purpose water conservancy engineering structure, the ship lock undertakes the key function of navigation. The present invention relates to the field of ship lock construction technology, focusing on the renewal of the core component of the underwater structure, namely the lock chamber bottom plate. Specifically, it is a ship lock chamber bottom plate partition replacement construction method, including measurement segmentation, partition removal, anchor reinforcement, joint surface treatment, steel bar template placement and casting molding. The beneficial effects are: the method of replacing the ship lock chamber bottom plate with partitions allows the old bottom plate and the replaced bottom plate to jointly bear the stress released after the original bottom plate is removed, avoiding the impact of the unbalanced thrust caused by the use of bracing on the stability of the side wall; the replaced bottom plate is equipped with stress-bearing steel bars and anti-floating anchors, and the new and old concrete on both sides adopt an inverted slope combination method, which is conducive to the connection between the bottom plate and the bedrock and the combination of the new and old concrete; the use of partition replacement is conducive to changing the bottom plate with a large aspect ratio into a concrete casting block with a similar aspect ratio, reducing the occurrence of concrete shrinkage cracks.

Description

Technical Field

[0001] The invention relates to the technical field of ship lock chamber bottom plate construction, and in particular to a ship lock chamber bottom plate compartment replacement construction method. Background Art

[0002] As specialized hydraulic structures, ship locks play a crucial role in ensuring navigation. In the past, due to a shortage of high-performance building materials, limited technical capabilities, and insufficient funding, ship locks consisted of both concrete and masonry structures, constructed to relatively low standards. Many ship lock slabs are designed with plain concrete, which offers low strength, while the side walls of the lock chambers are constructed with masonry, which offers far less integrity than reinforced concrete. In particular, the concrete floor of the lock chambers lacks load-bearing reinforcement and often sits directly on the foundation. As a typical underwater structure, the lock chamber floor has undergone extensive underwater operation, and the concrete strength and stability often fail to meet operational requirements. Older, less-than-perfect slabs urgently require replacement.

[0003] The ship lock maintenance task focuses on the replacement of the core component of the underwater structure, the lock chamber floor. While preserving the lock chamber side walls, the old lock chamber floor must be removed and a new floor must be cast. The original lock chamber floor was a plain concrete structure with a thickness of 0.5m, and the side walls of the original lock chamber were masonry. The old ship lock floor concrete was insufficiently strong and had severe water leakage, necessitating replacement. Ensuring the safety and stability of the existing masonry structure of the lock chamber side walls during the replacement of the floor was a major construction challenge. The masonry structure itself lacked integrity and was fragile. After the lock water was pumped out, seepage from the groundwater behind the lock chamber side walls further increased the wall's instability.

[0004] Under normal construction conditions, two layers of steel bracing should be installed along the entire lock chamber to ensure that the lateral stress of the side walls after the bottom plate is removed is transferred to the bracing. However, after the bracing is installed, the already narrow space of the lock chamber is densely packed with bracing steel structures, making the operating space during the bottom plate removal even smaller, restricting the working space of construction machinery and personnel, and bringing difficulties to construction. Summary of the Invention

[0005] The object of the present invention is to provide a construction method for replacing the bottom plate compartment of a ship lock chamber to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A construction method for replacing a lock chamber bottom plate compartment, the construction method comprising the following steps:

[0008] Step 1: Measure and segment, divide the single section bottom plate into several small sections along the length of the lock chamber to form multiple groups of compartment structures;

[0009] Step 2: Remove the partitions. Use a concrete cutter to cut the partition boundary line where the base plate is to be removed. Use a hydraulic breaker to break the base plate into compartments. Clean and level the base plate after breaking.

[0010] Step 3: Anchor reinforcement: After removing the old bottom plate compartments, anti-floating anchor rods are added in a plum blossom shape within the bottom plate;

[0011] Step 4: Joint surface processing: cutting the remaining old baseboard joint surface into an inverted bevel;

[0012] Step 5: Install the steel bar and formwork at the bottom of the cleaned and leveled compartment;

[0013] Step 6: Casting and shaping: pour concrete on the bottom of the compartment, vibrate it, and maintain it in shape.

[0014] Preferably, in step one, each section of the bottom plate is divided into several small sections along the length direction of the lock chamber according to the length of the original lock bottom plate. A total station is used to accurately locate each section according to the length of each section, and the boundary of the compartment is marked with an ink fountain line. A laser level is used to check the bottom plate elevation to ensure that the deviation between the dividing line and the design axis is ≤3mm.

[0015] Preferably, in the step 1, each compartment is numbered, and a settlement observation point is set every 10m on the top of the side wall and fixed with stainless steel measuring nails. Regular observation is required during the removal and replacement of the bottom plate.

[0016] Preferably, the order of dismantling the partitions in step 2 is intermittent dismantling. First, a concrete cutter is used to cut the partition dividing line of the base plate to be removed, and the cutting depth is controlled at 2 / 3 of the thickness of the structural layer. There is no need to cut the left and right dividing lines of the base plate that is not to be removed. After the partition dividing line is cut, a hydraulic breaker is used to separate the base plate and crush it. After the base plate is crushed, an excavator is used to remove the debris, and then a dump truck is used to transport the debris to the waste dump. The building base is leveled by manual and mechanical means.

[0017] Preferably, in step three, the anchor rod is set to an inverted L-shape, and is 1.95m long downward and 0.3m bent. The hole positions of each section of the anti-floating anchor rod are measured and laid out using a theodolite or total station. After the hole positions are determined, short steel bars are used as marks to penetrate deep into the ground. The allowable deviation of the anchor rod hole position is ≤20mm. Then, according to the construction drawings and elevation control points, the bottom plate elevation points are measured and laid out using a level to facilitate subsequent anchor rod hole depth control and anchor rod construction.

[0018] Preferably, after measuring and releasing the anchor hole position in the step three, a rock drill is used to drill a hole, and the drill bit is aligned with the anchor hole position to be constructed; after drilling to the designed depth, a hole cleaning operation is performed by using high-pressure air blowing combined with manual inspection to remove the stone debris at the bottom of the hole and the stone powder adhering to the hole wall; when installing the anchor rod, it should be ensured that the anchor rod is vertically sent into the hole along the axis of the hole until it reaches the designed position, and the top elevation of the anchor rod should be measured after the anchor rod is inserted into the hole position to ensure that the top ends of the anchor rods of the gate chamber bottom plate group are located at the same designed horizontal plane, and after installation, grouting is started using a grouting machine, and covering measures are taken for maintenance to ensure that the maintenance time is not less than 7 days; the anchor rod must pass the pull-out strength test before entering the next construction process.

[0019] Preferably, in step 4, a cutting machine is used to cut the retained bottom plates on both sides into inverted slopes, the surface slurry and loose particles are removed, the aggregate is flushed with a high-pressure water gun until the aggregate is exposed, and an interface agent (epoxy resin) is applied to the interface between the new and old concrete to enhance the bonding strength between the new and old concrete.

[0020] Preferably, in step five, the position line of the steel bars is popped out on the foundation surface of the ship lock according to the design requirements, and the processed steel bars are installed one by one according to the position line to ensure that the spacing and position of the steel bars meet the design requirements. The intersections of the steel bars should be firmly tied with wire, and the template in step five is brushed with a release agent before installation.

[0021] Preferably, the pouring process in step six is ​​to start from a low place, gradually advance to a high place, and pour in layers, with the thickness of each layer being less than 30 cm. After pouring is completed, an insert vibrator is used for vibrating, and the concrete is cured and formed after being dense.

[0022] Preferably, in step 4, a cutting machine is used to cut the bottom plates retained on both sides into inverted slopes, and the slope of the inverted slopes can be optimized and determined by theoretical calculation or numerical simulation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] By replacing the lock chamber floor with a compartment, the old and replaced floor plates share the stress released after the original floor plate is removed, avoiding the uneven thrust caused by the use of bracing that could affect the stability of the side walls and resolving the problem of lock chamber side wall stability during floor plate replacement. Furthermore, since there is no need for dense temporary bracing within the lock chamber, which would reduce operating space, this creates conditions for the installation of mechanical equipment within the already narrow lock chamber space, simplifying the construction process, shortening the construction period, and reducing both construction difficulty and costs.

[0025] The replaced bottom plate is equipped with additional stress-bearing steel bars and anti-floating anchor rods. The new and old concrete on both sides are combined with an inverted slope, and the replacement method is adopted to facilitate the connection between the bottom plate and the bedrock and the bonding of the new and old concrete.

[0026] The use of compartment replacement is beneficial for changing the base plate with a large aspect ratio into a concrete casting block with a similar aspect ratio, reducing the occurrence of concrete shrinkage cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the original ship lock bottom plate splitting of the present invention;

[0028] Figure 2 This is a schematic diagram of a compartment of the present invention;

[0029] Figure 3 This is a schematic diagram of the partition removal of the present invention;

[0030] Figure 4 It is the anchor rod construction drawing of the present invention;

[0031] Figure 5 Positioning the anchor hole of the present invention;

[0032] Figure 6 The three-dimensional finite element model (a) and calculation results (b) of the connection section between the new and old bottom plates of the present invention;

[0033] Figure 7 This is a schematic diagram of the treatment of the interface between new and old concrete according to the present invention. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figures 1 to 7 , the present invention provides a technical solution:

[0036] A construction method for replacing a lock chamber bottom plate compartment comprises the following steps:

[0037] Step 1: Measure and divide the bottom plate into several small sections along the length of the lock chamber to form multiple compartment structures. When the compartments are removed and the bottom plate concrete is poured, the bottom plate of the remaining section plays a supporting role against the side wall of the lock chamber. Figure 1 ),like Figure 2Each section of the bottom plate was divided into several small sections along the length of the lock chamber. A total station was used to accurately locate each section, and the compartment boundaries were marked with ink lines. A laser level was used to verify the bottom plate elevation, ensuring that the deviation between the dividing line and the design axis was ≤3mm. Each compartment was numbered (e.g., A1, B1, A2, B2, A3, B3, etc.). Settlement observation points were set every 10m at the top of the side wall, secured with stainless steel measuring pins. Regular observations were required during the removal and replacement of the bottom plate. The demolition sequence was marked, with the area with less stress on the side wall (e.g., the middle section) being prioritized as the initial demolition section (e.g., B1→B2→B3) to avoid stress concentration at both ends.

[0038] Step 2: Dismantle the compartments. Use a concrete cutter to cut the compartment boundary line of the bottom plate to be removed. Use a hydraulic breaker to crush the bottom plate into compartments. After crushing, clean and level the compartments. When dismantling the compartments of the lock bottom plate, give priority to areas with less stress on the side wall (such as Figure 3 The middle section of the steel structure is taken as the initial demolition section, and the demolition is carried out in sections according to the numbering sequence (such as B1→B2→B3) to avoid stress concentration at both ends.

[0039] Make adequate preparations before construction: organize construction personnel to carefully study the construction drawings and technical data, familiarize themselves with the project overview, construction technology and quality requirements, and carry out pre-job training for construction personnel, covering the content of safety operating procedures. The order of partition removal is interval removal. First, use a concrete cutter to cut the partition dividing line of the base plate to be removed, and control the cutting depth to 2 / 3 of the thickness of the structural layer. There is no need to cut the left and right dividing lines of the base plate that will not be removed. After the partition dividing line is cut, use a hydraulic breaker to separate the base plate and crush it. After the base plate is crushed, use an excavator to remove the debris, and then use a dump truck to transport the debris to the waste dump. The building base is leveled by manual cooperation with machinery.

[0040] Step 3: Anchor reinforcement. After the old bottom plate compartments are removed, anti-floating anchor rods are added in a plum blossom shape within the bottom plate. Figure 4 The anchor rod is set to an inverted L shape, with a downward length of 1.95m and a bend of 0.3m. The construction process of the anchor rod is as follows:

[0041] 1. Before construction, first use the theodolite or total station to measure the hole position of each section of anti-floating anchor according to the design drawings and the compartment boundary line ( Figure 5 After determining the hole location, use short steel bars as markers and drill deep into the ground. The allowable deviation of the anchor hole location is ≤20mm. Then, based on the construction drawings and elevation control points, use a level to measure and lay out the bottom plate elevation points to facilitate subsequent anchor hole depth control and anchor construction.

[0042] 2. After measuring and laying out the anchor hole position, use a rock drill to drill, and align the drill bit with the anchor hole position to be constructed; the rock drill is the key equipment for drilling operations, using compressed air as power, and the impact force of the front drill bit breaks the rock into stone powder. The anchor hole diameter is 60mm, and the hole position deviation shall not be greater than ±20mm. During the drilling process, it is necessary to ensure the verticality of the drill rod to prevent the anchor hole from deflecting, and check the verticality of the drill rod at any time to ensure the quality of drilling. Detailed original records of the entire drilling must be made for each anchor rod.

[0043] 3. Clean the hole. After drilling to the designed depth, use high-pressure air blowing combined with manual inspection to clean the hole to remove the stone chips at the bottom of the hole and the stone powder adhering to the hole wall. After the hole is cleaned, the hole mouth must be covered in time to prevent debris from falling into the hole.

[0044] 4. Anchor bolt installation

[0045] 1) Before inserting the anchor rod into the drill hole, the quality of the rod body should be carefully checked to ensure that it fully meets the design requirements.

[0046] 2) During the installation of the anchor bolt, the drill hole should be inspected. If any debris or debris is found in the drill hole, it should be removed immediately. If necessary, the anchor bolt should be pulled out, cleaned and reinserted.

[0047] 3) When installing the anchor rod, ensure that the anchor rod is inserted vertically into the hole along the axis of the hole until it reaches the designed position.

[0048] 4) After the anchor rods are inserted into the holes, the top elevation should be measured to ensure that the tops of the anchor rods on the bottom plate of the lock chamber are on the same design horizontal plane.

[0049] 5. Grouting

[0050] 1) Grouting materials must meet the specifications and design requirements and can only be used after passing the sampling test.

[0051] 2) The grouting material should be M20 cement mortar, with a water-cement ratio of 0.45 to 0.5. The cement mortar should be mixed evenly and used immediately after mixing, ensuring that all the mortar mixed is used before initial setting.

[0052] 3) To increase the workability of the slurry and improve the early strength of the cement slurry, a proper amount of water reducer and early strength agent can be added to the slurry. At the same time, to prevent the injected cement mortar from solidifying and shrinking, a proper amount of expansion agent can be added.

[0053] 4) Before grouting, remove any remaining or loose debris from the hole and check if there is any debris blocking the hole. If any, remove the anchor rod if necessary, remove the debris, and reinsert it.

[0054] 5) Before grouting, the grouting pipe should be lowered to the bottom of the hole and firmly connected to the grouting machine.

[0055] 6) Stir the cement mortar and put the mixed slurry into the slurry drum, then start the grouting machine to start the grouting operation.

[0056] 7) During grouting, ensure the filling coefficient is greater than 1. If the filling coefficient is less than 1, further analysis is required. If the cause is foreign matter blocking the hole, the anchor bolt should be removed, the mortar and foreign matter removed, and grouting should be repeated. If the filling coefficient is greater than 1.1, timely communication should be conducted with the owner and designer to jointly analyze and explore solutions.

[0057] 8) During the grouting process, test blocks shall be retained to test the strength of the slurry, with no less than 6 blocks in each group, and at least one group shall be retained for every 30 anchor rods.

[0058] 6. Maintenance

[0059] Covering measures should be taken for maintenance to ensure that the maintenance time is not less than 7 days.

[0060] 7. Anchor test

[0061] The anchor rod must pass the pull-out test before entering the next construction process.

[0062] Step 4: Joint surface treatment: Cut the remaining old baseboard joint surface into an inverted bevel, including:

[0063] 1. Determination of the slope of the inverted slope

[0064] like Figure 6 The slope of the inverted slope was determined by establishing a three-dimensional finite element model of the connection section between the new and old base plates and comparing three slope schemes (1:0.4, 1:0.6, and 1:0.8). According to the calculation results of the base plate under load, the deformation of the joint surface is larger when the slope is larger, and the concrete stress is larger when the slope is smaller. After taking into account the simulation results of the concrete stress of the joint surface and the deformation of the joint surface, the slope of the inverted slope was finally determined to be 1:0.6.

[0065] 2. Bevel cutting

[0066] like Figure 7 , use a cutting machine to cut the retained bottom plates on both sides into inverted slopes, remove the surface slurry and loose particles, rinse with a high-pressure water gun until the aggregate is exposed, and apply an interface agent (epoxy resin) on the interface between the new and old concrete to enhance the bonding strength of the new and old concrete.

[0067] Step 5: Install the steel bars and formwork at the bottom of the cleaned and leveled compartment. The installation process includes:

[0068] 1. Steel bar production and installation

[0069] 1) Steel bar processing

[0070] According to the design requirements, the steel bars are cut and bent to ensure that the size and shape of the steel bars meet the requirements. The processed steel bars should be stacked and marked for easy access during installation;

[0071] 2) Steel bar installation

[0072] The steel bar position lines are drawn on the ship lock foundation surface according to the design requirements. The processed steel bars are installed one by one according to the position lines, ensuring that the spacing and position of the steel bars meet the design requirements. The intersections of the steel bars should be firmly tied with wire, and the wire should be fully tied to ensure that the steel bars will not shift during the concrete pouring process. During the steel bar installation process, care should be taken to protect the steel bar's protective layer. Pads can be used to control the thickness of the protective layer.

[0073] 3) Steel bar inspection

[0074] After the installation of steel bars is completed, an inspection should be carried out to ensure that the model, specification, quantity, spacing, position and protective layer thickness of the steel bars meet the design requirements; any problems found during the inspection should be rectified in a timely manner to ensure that the quality of steel bar installation meets the requirements.

[0075] 2. Template production and installation

[0076] 1) Template processing

[0077] Carry out fine processing of the template on site according to the drawing dimensions. Select high-quality templates without bending, deformation and damage, and apply mold release agent to the template before use;

[0078] 2) Template installation

[0079] Ensure that the shape, size, and relative position of the structure and components are accurate. The formwork should have sufficient load-bearing capacity, rigidity, and stability to reliably withstand the weight and lateral pressure of concrete pouring, as well as other loads during construction. The joints of the formwork must be tight and no leakage should occur. The formwork supports should be firmly installed on a solid foundation and have sufficient support area to ensure that the poured structure will not sink, crack, sand, or bulge.

[0080] 3) Template removal method

[0081] During the demolition process, certain steps and precautions must be followed to ensure smooth demolition. The side formwork must be removed when the concrete strength is sufficient to ensure that its surface and edges are not damaged during the demolition process. During the demolding process, special care should be taken to avoid damage to the concrete surface or formwork. After the demolding is completed, it should be cleaned up in time and stacked according to type and size for easy use next time.

[0082] 4) Template inspection

[0083] Before pouring the base slab concrete, check the formwork for flatness, straightness, and smoothness, check the tightness of the formwork joints, verify the formwork thickness, the thickness of the steel bar cover, the accuracy of the formwork position, the stability of the supports, and verify the correct installation elevation of the formwork. During the concrete pouring process, the formwork and its stability should be continuously observed and maintained, and any abnormalities such as formwork expansion or formwork slippage should be promptly identified and addressed.

[0084] Step 6: Casting and forming, pouring concrete on the bottom of the compartment, vibrating, and curing to form; the casting construction process includes:

[0085] 1. Preparation before construction

[0086] 1) Before pouring concrete, check the formwork and steel bars to ensure they meet the design requirements;

[0087] 2) Clean the base and remove accumulated water and debris;

[0088] 3) Check the concrete pouring equipment to ensure its normal operation;

[0089] 4) Prepare the concrete raw materials and inspect them to ensure the quality.

[0090] 2. Concrete pouring

[0091] 1) Pour in layers, with each layer thickness not exceeding 30cm to ensure that the concrete can be fully vibrated and compacted;

[0092] 2) Start from the bottom and gradually move up to the top to maintain the continuity of concrete pouring;

[0093] 3) Use an insert vibrator for vibration. Insert quickly and remove slowly, insert the vibrator evenly to avoid missed vibration and over-vibration.

[0094] 4) Pay attention to the vibration of the corners to ensure that the concrete is dense.

[0095] 3. Concrete curing

[0096] 1) After pouring is completed, timely cover and moisturize the material for maintenance, and the maintenance time should be no less than 7 days;

[0097] 2) According to the temperature and humidity conditions, adjust the maintenance measures appropriately to ensure the normal growth of concrete strength.

[0098] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for replacing a lock chamber floor partition, characterized by: The construction method comprises the following steps: Step 1: Measure and segment, divide the single section bottom plate into several small sections along the length of the lock chamber to form multiple groups of compartment structures; Step 2: Remove the partitions. Use a concrete cutter to cut the partition boundary line where the base plate is to be removed. Use a hydraulic breaker to break the base plate into compartments. Clean and level the base plate after breaking. Step 3: Anchor reinforcement: After removing the old bottom plate compartments, anti-floating anchor rods are added in a plum blossom shape within the bottom plate; Step 4: Process the joint surface and cut the joint surface of the old base plate into an inverted bevel; Step 5: Install the steel bar and formwork at the bottom of the cleaned and leveled compartment; Step 6: Casting and shaping: pour concrete on the bottom of the compartment, vibrate it, and maintain it in shape.

2. A method for replacing a lock chamber floor partition according to claim 1, characterized in that: In the step 1, each section of the bottom plate is divided into several small sections along the length of the lock chamber according to the length of the original lock bottom plate. A total station is used to accurately locate each section according to the length of each section, and the boundary of the compartment is marked with an ink fountain line. A laser level is used to check the bottom plate elevation to ensure that the deviation between the dividing line and the design axis is ≤3mm.

3. The method for replacing a lock chamber floor partition according to claim 2, characterized in that: In the step 1, each compartment is numbered, and settlement observation points are set every 10m on the top of the side wall and fixed with stainless steel measuring nails. Regular observations are required during the removal and replacement of the bottom plate.

4. The method for replacing a lock chamber floor partition according to claim 1, characterized in that: The order of dismantling the partitions in step 2 is interval dismantling. First, a concrete cutter is used to cut the partition dividing line of the base plate to be removed, and the cutting depth is controlled at 2 / 3 of the thickness of the structural layer. There is no need to cut the left and right dividing lines of the base plate that is not to be removed. After the partition dividing line is cut, a hydraulic breaker is used to separate the base plate and crush it. After the base plate is crushed, an excavator is used to remove the debris, and then a dump truck is used to transport the debris to the waste dump. The building base is leveled by manual and mechanical methods.

5. The method for replacing a lock chamber floor partition according to claim 1, characterized in that: In the step three, the anchor rod is set to an inverted L shape, and is 1.95m long downward and bends 0.3m. The hole positions of each section of the anti-floating anchor rod are measured and laid out using a theodolite or total station. After the hole positions are determined, short steel bars are used as marks to penetrate deep into the ground. The allowable deviation of the anchor rod hole position is ≤20mm. Then, according to the construction drawings and elevation control points, the bottom plate elevation points are measured and laid out using a level for subsequent anchor rod hole depth control and anchor rod construction.

6. A method for replacing a lock chamber floor partition according to claim 5, characterized in that: After measuring and setting out the anchor hole position in the step three, use a rock drill to drill holes, and align the drill bit with the anchor hole position to be constructed; after drilling to the designed depth, use air blowing combined with manual inspection to clean the hole to remove the stone debris at the bottom of the hole and the stone powder adhering to the hole wall; when installing the anchor rod, ensure that the anchor rod is vertically sent into the hole along the axis of the hole until it reaches the designed position. After the anchor rod is inserted into the hole position, the top elevation must be measured to ensure that the top ends of the anchor rods of the gate chamber bottom plate group are located at the same designed horizontal plane. After installation, use a grouting machine to start grouting, and take covering measures for maintenance to ensure that the maintenance time is not less than 7 days; the anchor rod must pass the pull-out strength test before entering the next construction process.

7. The method for replacing a lock chamber floor partition according to claim 1, characterized in that: In the fourth step, a cutting machine is used to cut the retained bottom plates on both sides into inverted slopes, the surface slurry and loose particles are removed, and the aggregate is washed with a high-pressure water gun until the aggregate is exposed. An interface agent is applied to the interface between the new and old concrete to enhance the bonding strength of the new and old concrete.

8. The method for replacing a lock chamber floor partition according to claim 1, characterized in that: In the step five, the position lines of the steel bars are popped out on the foundation surface of the ship lock according to the design requirements, and the processed steel bars are installed one by one according to the position lines to ensure that the spacing and position of the steel bars meet the design requirements. The intersections of the steel bars should be firmly tied with wire. In step five, the template is brushed with a release agent before installation.

9. The method for replacing a lock chamber floor partition according to claim 1, characterized in that: The pouring process in step six is ​​to start from a low place, gradually advance to a high place, and pour in layers. The thickness of each layer is less than 30 cm. After pouring is completed, an inserted vibrator is used for vibration. After the concrete is dense, it is cured and formed.

10. A method for replacing a lock chamber floor partition according to claim 7, characterized in that: In the step 4, a cutting machine is used to cut the bottom plates retained on both sides into inverted slopes, and the slope of the inverted slopes can be optimized and determined by theoretical calculation or numerical simulation.

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