A water construction pile foundation mud treatment system and a treatment method

Abstract

The present application belongs to the field of bridge engineering construction, and particularly relates to a water construction pile foundation mud treatment system and a treatment method, which comprises a steel cofferdam formed by steel sheet piles, a filter device is fixed on the inner side of the steel sheet piles, the filter device comprises a fixed frame and filter cotton; a steel bracing purlin is arranged in the steel sheet pile; a steel sleeve is arranged at the position of the pile foundation in the steel cofferdam. The present application utilizes the steel cofferdam which should be constructed to make a new mud treatment system, and does not need to additionally arrange a mud circulating system and transport the mud, so that the mud is filtered into the steel cofferdam, the mud inflow into the river is blocked, the pouring efficiency is improved, the cost is greatly saved, the manpower and material resources are saved, and the environmental pollution is not caused.

Description

Technical Field

[0001] The invention belongs to the field of bridge engineering construction, and in particular relates to a system and method for treating pile foundation slurry in water construction. Background Art

[0002] As a crucial component of bridge foundation engineering, underwater pile foundations transmit downward force from top to bottom. During the drilling and pouring of underwater cast-in-place piles, a large amount of mud is required to protect the walls. Transporting large amounts of mud to the riverbank for disposal significantly increases costs and is inefficient. Furthermore, operating on a limited underwater platform and transporting mud back and forth can easily cause discontinuities in the pouring process, increasing the risk of broken piles. Furthermore, to meet environmental protection requirements, mud handling in river channels imposes higher technical requirements, making it a major challenge in handling mud for underwater pile foundations. Summary of the Invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a system and method for treating pile foundation slurry in water construction.

[0004] The present invention is achieved through the following technical solutions:

[0005] A mud treatment system for pile foundations constructed on water, comprising steel sheet piles, which form a steel cofferdam around the pile foundations; a filter device is fixed on the inner side of the steel sheet piles; the filter device comprises a fixed frame and filter cotton; the filter cotton is fixed in the fixed frame; a plurality of bolt holes are provided on the fixed frame; nuts are welded at positions corresponding to the bolt holes on the inner side of the steel sheet piles; bolts pass through the bolt holes and are connected to the nuts to fix the filter device on the inner side of the steel sheet piles; a steel purlin is provided in the steel cofferdam; and a steel sleeve is driven into the pile foundation position in the steel cofferdam.

[0006] Preferably, the steel sheet piles are Larsen steel sheet piles.

[0007] Preferably, an internal support is provided inside the steel purlin.

[0008] A method for treating slurry for pile foundations constructed on water is provided based on the system for treating slurry for pile foundations constructed on water of the present invention, and comprises the following steps:

[0009] Step 1: Weld nuts on the inner side of the steel sheet pile, fix the filter cotton in the fixed frame, and open bolt holes on the fixed frame;

[0010] Step 2: Construct steel sheet piles around the water pile foundation position according to the design drawings to form a steel cofferdam;

[0011] Step 3: Use bolts to pass through the bolt holes on the fixing frame and connect them with the corresponding nuts to fix the filter device on the inner side of the steel sheet pile;

[0012] Step 4: Set up a water drilling platform above the steel cofferdam;

[0013] Step 5: Drive the steel sleeve used for pile foundation drilling construction through the water drilling platform;

[0014] Step 6: Carry out pile foundation drilling and grouting construction on the water drilling platform;

[0015] Step 7: During the pouring process, the slurry is discharged into the steel cofferdam, and flocculants are placed inside the steel cofferdam;

[0016] Step 8: After the pile foundation is poured, the water drilling platform is removed, the steel cofferdam is sealed and blocked, and the water is gradually pumped out and steel cofferdam purlins are added;

[0017] Step 9: After the water is pumped out, remove the excess earth and settled mud in the steel purlin and then proceed with the bottom concrete construction. Finally, construct the tie beams and piers in sequence.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention utilizes the steel cofferdam that should be constructed to create a new mud treatment system. There is no need to set up a separate mud circulation system, nor is there any need to transport the mud. It is not restricted by space, thus improving the pouring efficiency, greatly saving costs, and saving manpower and material resources.

[0020] 2. The present invention retains the mud in the steel cofferdam through the filtering device, blocking the mud from flowing into the river, causing no environmental pollution, meeting the requirements of green and environmentally friendly construction, and does not require secondary repeated maintenance, which greatly reduces the project maintenance cost.

[0021] 3. The present invention solidifies and settles the mud in the steel cofferdam, which is convenient for cleaning and conforms to the concept of green environmental protection.

[0022] 4. The present invention and the method can solve the problems of high cost and low efficiency in transporting mud from the water to the shore. The present invention and the method can make the pouring of bored piles more continuous and the pouring quality higher, greatly reduce the risk of broken piles, and improve the overall quality of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the connection portion of the filter device of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the filtering device of the present invention.

[0026] In the figure, 1 is filter cotton, 2 is steel sheet pile, 3 is steel purlin, 4 is bolt hole, 5 is steel sleeve, 6 is bolt, 7 is nut, and 8 is fixing frame. DETAILED DESCRIPTION

[0027] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0028] The present invention aims to use the steel cofferdam as a temporary mud pool, filter clean water into the river through the filtration system of the present invention, and retain the mud in the steel cofferdam, so that the mud treatment process can save costs, improve efficiency, shorten the construction period, while ensuring the quality of the bored piles and meeting the requirements of green construction.

[0029] The filtration system of the present invention includes a steel cofferdam surrounded by steel sheet piles 2. In this embodiment, the steel sheet piles 2 are Larsen steel sheet piles. The steel cofferdam is constructed around the location where the water pile foundation needs to be constructed. A filter device is fixed on the inner side of the steel sheet pile 2. The filter device includes a fixed frame 8 and filter cotton 1. The filter cotton 1 is fixed to the fixed frame 8. The fixed frame 8 is made of steel and is provided with bolt holes 4. Nuts 7 are welded on the inner side of the steel sheet pile 2 at positions corresponding to the bolt holes 4. Bolts 6 are passed through the bolt holes 4 of the fixed frame 8 and then connected to the corresponding nuts 7, thereby fixing the filter device on the inner side of the steel sheet pile 2. The filter cotton 1 forms an anti-filtration layer on the inner wall of the steel cofferdam. The filter cotton 1 allows the clean water in the steel cofferdam to flow through the filter cotton 1 into the river outside the steel cofferdam, while the mud remains in the steel cofferdam due to the obstruction of the filter cotton 1.

[0030] Steel purlins 3 are set in the steel cofferdam, and internal support is provided in the steel purlins 3. The steel purlins 3 and the internal support in the steel purlins 3 are conventional settings in steel cofferdam construction and will not be described in detail here. Steel sleeves 5 are set at the pile foundation position in the steel cofferdam for pile foundation drilling construction.

[0031] Based on the above-mentioned filtration system, the present invention also provides a method for treating pile foundation slurry in water construction, and the specific steps are as follows:

[0032] Step 1: Transport the steel sheet pile 2, filter cotton 1, steel sleeve 5 and other materials to the construction site, weld nuts 7 on the inner side of the steel sheet pile 2, that is, the side facing the pile foundation, and the welded nuts 7 correspond to the bolt holes 4 on the fixed frame 8; fix the filter cotton 1 in the fixed frame 8 to form a filtering device, and open several bolt holes 4 on the fixed frame 8.

[0033] Step 2: Measure and locate according to the requirements of the design drawings, construct steel sheet piles 2, and form a steel cofferdam around the pile foundation above water. In this embodiment, the steel cofferdam is in a rectangular shape as a whole.

[0034] Step 3: Use bolts 6 to pass through the bolt holes 4 on the fixed frame 8 and thread them together with the nuts 7 on the corresponding steel sheet piles 2 to fix the filtering device on the steel sheet piles 2. Filter cotton 1 is fixed on all four sides of the inner wall of the steel cofferdam for subsequent filtering of the mud in the steel cofferdam.

[0035] Step 4: Set up an above-water drilling platform above the steel cofferdam.

[0036] Step 5: Drive the steel sleeve 5 used for the above-water pile foundation drilling construction through the above-water drilling platform.

[0037] Step 6: Carry out pile foundation drilling and pile foundation pouring construction on the water drilling platform.

[0038] Step 7: Add flocculants into the steel cofferdam. The flocculants make the small particles in the mud adsorb to each other to form large particles, which accelerates the sinking. During the pouring process, the mud in the pile foundation will be continuously discharged into the steel cofferdam in the water. In order to maintain the water pressure balance inside and outside the steel cofferdam, the clean water flows out of the steel cofferdam through the filtration device to the river outside, while the mud remains in the steel cofferdam and gradually settles to the bottom of the steel cofferdam.

[0039] Step 8: After the pile foundation is poured, the water drilling platform is removed, the steel cofferdam is sealed and blocked, and water is gradually pumped out and steel cofferdam 3 is added;

[0040] Step 9: After the pumping is completed, the excess earth and settled mud on the riverbed within the steel purlin 3 are excavated and then the bottom concrete is constructed. Finally, the tie beams and piers are constructed in sequence.

[0041] The embodiment described above is only one of the preferred specific implementation methods of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for treating pile foundation slurry in water construction, characterized by: The invention comprises a mud treatment system for pile foundations constructed on water, wherein the mud treatment system comprises steel sheet piles (2), the steel sheet piles (2) forming a steel cofferdam around the pile foundation, a filter device being fixed on the inner side of the steel sheet piles (2), the filter device comprising a fixed frame (8) and filter cotton (1), the filter cotton (1) being fixed in the fixed frame (8), a plurality of bolt holes (4) being provided on the fixed frame (8), nuts (7) being welded at positions corresponding to the bolt holes (4) on the inner side of the steel sheet piles (2), bolts (6) passing through the bolt holes (4) and connected to the nuts (7) to fix the filter device on the inner side of the steel sheet piles (2); a steel purlin (3) being provided in the steel cofferdam; a steel sleeve (5) being driven at the pile foundation position in the steel cofferdam; and the mud treatment method for pile foundations constructed on water comprises the following steps: Step 1: Weld a nut (7) on the inner side of the steel sheet pile (2), fix the filter cotton (1) in the fixed frame (8), and open a bolt hole (4) on the fixed frame (8); Step 2: construct steel sheet piles (2) around the water pile foundation position according to the design drawings to form a steel cofferdam; Step 3: Use bolts (6) to pass through the bolt holes (4) on the fixing frame (8) and thread them together with the corresponding nuts (7) to fix the filter device on the inner side of the steel sheet pile (2); Step 4: Set up a water drilling platform above the steel cofferdam; Step 5: driving a steel sleeve (5) for pile foundation drilling construction through an above-water drilling platform; Step 6: Carry out pile foundation drilling and grouting construction on the water drilling platform; Step 7: During the pouring process, the slurry is discharged into the steel cofferdam, and flocculants are placed inside the steel cofferdam; Step 8: After the pile foundation is poured, the water drilling platform is removed, the steel cofferdam is sealed and blocked, and water is gradually pumped out and steel cofferdam purlins are added (3); Step 9: After the pumping is completed, the excess earth and settled mud in the steel purlin (3) are excavated and then the bottom concrete is constructed. Finally, the tie beams and piers are constructed in sequence.

2. The method for treating pile foundation slurry for water construction according to claim 1, characterized in that: The steel sheet piles (2) are Larsen steel sheet piles.

3. The method for treating slurry in pile foundation for water construction according to claim 1, characterized in that: An internal support is provided in the steel purlin (3).

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