Construction method for mud circulation system of coastal tidal liquefaction site
By adopting a mud circulation system construction method in the construction of coastal tidal liquefaction sites, including compaction treatment and concrete layer with built-in reinforced mesh layer, as well as precipitation filtration in multiple precipitation areas, the problem of mud loss is solved and construction efficiency and quality is improved.
Patent Information
- Application Number
- CN202510150579.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-05-06
AI Technical Summary
During the construction of the coastal tidal liquefaction site, mud loss occurred in the mud pool, resulting in slow construction progress and unavailable quality.
The mud circulation system construction method is adopted, including forming a strip-shaped mud pool on the construction site, with a top opening and an enclosing wall on the top, the enclosing wall is compacted and a concrete layer is poured, and a reinforced mesh layer is built into the concrete layer. At the same time, multiple partition walls are constructed to form multiple precipitation areas, and high-quality new mud is formed by precipitation filtration.
Effectively prevent mud loss, ensure the reliable supply of high-quality wall protection mud, and improve construction progress and quality.
Smart Images
Figure CN119933147A_ABST
Abstract
Description
Technical Field
[0001] The invention patent relates to the technical field of cast-in-place piles, and specifically, to a method for constructing a mud circulation system for a coastal tidal liquefaction site. Background Art
[0002] The earthwork and pile foundation project of the warehouse (including the turntable) on the south side of Area A of Xiaomo Port Trade and Logistics Park is located in Xiaomo Town, Shenshan Special Cooperation Zone, Shenzhen. The project is located on the north side of the first port road in Da'ao Village, Binhai. 100m to the south is the Da'ao River, which flows into the sea alone, and 350m to the south is the Binhai District, which is hydraulically connected to the groundwater of this project. The site is filled with fish ponds. The project covers an area of about 35,000 square meters and a construction area of about 96,000 square meters. A 5-story warehouse and a 4-story truck turntable are built with a height of 41.3m and no basement. The warehouse building foundation design adopts bored cast-in-place piles, of which the bottom of the 1800mm diameter engineering piles is embedded in the medium-weathered rock for 11m or slightly weathered rock for 1m, and the average pile length is about 43m.
[0003] According to the analysis of the surrounding environment of the site and the survey data, the engineering problems faced by the rotary bored pile construction of this project are mainly that the coastal area is affected by the sea tides, and the groundwater level in the site fluctuates greatly due to the tides, with the maximum change in high and low water levels reaching 4.0m; the deep silt sand layer and silt sand layer distributed on the upper part of the site have a high liquefaction index, the overall liquefaction level is serious, the average thickness is 11m, and the site is distributed in layers.
[0004] When constructing rotary bored piles at the coastal tidal liquefaction site, traditional excavation was used in the early stage to form a mud pool, which was used to allow the old mud to flow and settle to produce high-quality new mud. However, during the construction process, due to the influence of tides and liquefied soil layers, mud loss occurred in the mud pool, and mud preparation was required frequently, resulting in slow construction progress and the construction quality could not be guaranteed. Summary of the invention
[0005] The object of the present invention is to provide a method for constructing a mud circulation system for a coastal tidal liquefaction site, aiming to solve the problem of mud loss in a mud pool during the construction of a coastal tidal liquefaction site in the prior art.
[0006] The present invention is achieved by: a method for constructing a slurry circulation system for a coastal tidal liquefaction site, comprising the following construction steps:
[0007] 1) Level the construction site;
[0008] 2) Excavating at the construction site to form a strip-shaped mud pool;
[0009] 3) The top of the mud pool has a top opening, and the mud pool has an enclosure wall, and the enclosure wall is compacted to form a compacted layer;
[0010] 4) pouring a concrete layer on the compacted layer, the concrete layer and the compacted layer are combined to form a whole, and a steel mesh layer is built in the concrete layer, and the steel mesh layer is laid flat along the extension direction of the enclosed wall;
[0011] 5) A plurality of partition walls are constructed and formed in the mud pool, and the plurality of partition walls are arranged at intervals along the length direction of the mud pool. The plurality of partition walls divide the mud pool into a plurality of sedimentation areas. The old mud discharged from the pile hole is sequentially filtered through the sedimentation of the plurality of sedimentation areas to form new mud for discharge into the pile hole. Convection ports are provided on the partition walls, and adjacent sedimentation areas are connected through the convection ports.
[0012] Optionally, in the construction step 5), the convection openings of adjacent partition walls are staggered along the width direction of the mud pool.
[0013] Optionally, along the flow direction of the old sludge in the sludge pool, the heights of the convection ports in the plurality of partition walls decrease sequentially.
[0014] Optionally, in the construction step 5), along the flow direction of the old mud in the mud pool, the multiple sedimentation zones include a first-stage sedimentation zone, an intermediate sedimentation zone and a final sedimentation zone in sequence. The old mud is discharged into the first-stage sedimentation zone for sedimentation and filtration, and then discharged into the intermediate sedimentation zone through the convection port for sedimentation and filtration, and then discharged into the final sedimentation zone through the convection port to form new mud.
[0015] Optionally, in the construction step 5), a slurry making platform is built on the final sedimentation tank, and an air compressor is provided on the slurry making platform. The air compressor injects air into the new slurry in the final sedimentation area for stirring.
[0016] Optionally, in the construction step 5), a slurry discharge platform is built on the final sedimentation area, and the slurry discharge platform is provided with a slurry discharge pump, and the slurry discharge pump discharges new slurry out of the final sedimentation area.
[0017] Optionally, in the construction step 5), an overflow limiting dike is provided at the end of the final sedimentation zone, and the overflow limiting dike limits the overflow of new slurry in the final sedimentation zone.
[0018] Optionally, in the construction step 4), the concrete layer includes a concrete cushion layer and a concrete surface layer, and the concrete cushion layer is cast on the compacted layer to form the concrete cushion layer, and the concrete cushion layer and the compacted layer are integrated into one;
[0019] After laying the steel mesh layer on the concrete cushion layer, a concrete surface layer is poured on the concrete cushion layer, and the concrete cushion layer, the steel mesh layer and the concrete surface layer are combined to form an integrated concrete layer.
[0020] Optionally, in the construction step 4), both sides of the mud pool are respectively cast to form a water retaining dam, and both sides of the steel mesh layer have side portions, and the side portions extend into the water retaining dam and are integrated with the water retaining dam;
[0021] The end of the side portion is connected with a side axis, and the side portion is arranged in a winding shape around the side axis. The side axis is formed in the middle of the water retaining dam, and the entire side portion is built in the water retaining dam.
[0022] Optionally, in the construction step 4), a plurality of recessed holes are formed on the compacted layer, and the plurality of recessed holes are distributed throughout the entire compacted layer, and the bottom of the concrete cushion layer is embedded in the recessed holes to form an integrated structure with the compacted layer;
[0023] The steel mesh layer is provided with a plurality of pins, the plurality of pins are arranged in a plurality of rows on the steel mesh layer to form a plurality of pin rows, the plurality of pin rows are arranged at intervals along the length direction of the mud pool, and the pin rows are extended along the width direction of the mud pool;
[0024] A plurality of the pins are inserted into the concrete cushion layer to form an integrated structure of the steel mesh layer and the concrete cushion layer; the steel mesh layer is in a tensioned state along the width direction of the mud pool, and the steel mesh has a spacing portion located between adjacent rows of pins, and the spacing portion is in a relaxed wrinkled state along the length direction of the mud pool.
[0025] Compared with the prior art, the method for constructing a mud circulation system for a coastal tidal liquefaction site provided by the present invention is to compact the enclosing wall, then pour to form a concrete layer, and embed a steel mesh layer in the concrete layer, so that the mud pool is reinforced to prevent seepage and cracking, and the problem of mud loss is effectively avoided during the subsequent construction process. Then, multiple sedimentation areas are formed by constructing multiple partition walls, and high-quality mud is formed through sedimentation and filtration in multiple sedimentation areas, thereby ensuring the reliable supply of high-quality wall protection mud. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the process of constructing a mud circulation system for a coastal tidal liquefaction site provided by the present invention;
[0027] Figure 2 is a schematic top view of a mud pool provided by the present invention;
[0028] Figure 3 It is a structural schematic diagram of the mud pool provided by the present invention.
[0029] Figure 4 It is a cross-sectional schematic diagram of the mud pool provided by the present invention;
[0030] Figure 5 It is a cross-sectional schematic diagram of the mud pool provided by the present invention;
[0031] Figure 6 It is a cross-sectional schematic diagram of the enclosing wall, concrete cushion layer, steel mesh layer and concrete surface layer provided by the present invention;
[0032] Figure 7 It is a cross-sectional schematic diagram of the water retaining dam provided by the present invention. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0034] The implementation of the present invention is described in detail below in conjunction with specific embodiments.
[0035] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0036] Reference Figure 1-7 The figure shows a preferred embodiment of the present invention.
[0037] The method for constructing a slurry circulation system for a coastal tidal liquefaction site provided by the present invention comprises the following construction steps:
[0038] 1) Level the construction site;
[0039] 2) Excavating at the construction site to form a strip-shaped mud pool 100;
[0040] 3) The top of the mud pool 100 has a top opening, and the mud pool 100 has an enclosing wall, and the enclosing wall is compacted to form a compacted layer;
[0041] 4) pouring a concrete layer on the compacted layer, the concrete layer and the compacted layer are combined to form a whole, and a steel mesh layer 102 is built into the concrete layer, and the steel mesh layer 102 is laid flat along the extension direction of the enclosed wall;
[0042] 5) A plurality of partition walls 110 are constructed and formed in the mud pool 100. The plurality of partition walls 110 are arranged at intervals along the length direction of the mud pool 100. The plurality of partition walls 110 divide the mud pool 100 into a plurality of sedimentation zones. The old mud discharged from the pile hole is sequentially filtered through the sedimentation of the plurality of sedimentation zones to form new mud for discharge into the pile hole. A convection port 111 is provided on the partition wall 110, and adjacent sedimentation zones are connected through the convection port 111.
[0043] The above-mentioned method for constructing a mud circulation system for a coastal tidal liquefaction site is to compact the enclosing wall, then pour a concrete layer, and embed a steel mesh layer 102 in the concrete layer, so that the mud pool 100 is reinforced against seepage and cracking, and the problem of mud loss is effectively avoided during the subsequent construction process. Then, multiple sedimentation areas are formed by constructing multiple partition walls 110, and high-quality mud is formed through sedimentation and filtration in multiple sedimentation areas, thereby ensuring a reliable supply of high-quality wall protection mud.
[0044] Specifically, a double-layer steel mesh layer 102 is provided at the corners, water level lines and other weak places with complex stress for reinforcement.
[0045] In construction step 5), the convection ports 111 of adjacent partition walls 110 are arranged in a staggered manner along the width direction of the mud pool 100. In this way, the mud can be smoothly precipitated in multiple stages, ensuring the reliable supply of high-quality wall protection mud.
[0046] Along the flow direction of the old mud in the mud pool 100, the heights of the convection ports 111 in the plurality of partition walls 110 are sequentially reduced. In this way, the accumulation height of the sediment body is gradually reduced, and the height of the convection ports 111 is correspondingly reduced.
[0047] In this embodiment, in construction step 5), along the flow direction of the old mud in the mud pool 100, the plurality of sedimentation zones sequentially include the primary sedimentation zone 10, the intermediate sedimentation zone 20 and the final sedimentation zone 30. After the old mud is discharged into the primary sedimentation zone 10 for sedimentation and filtration, it is discharged into the intermediate sedimentation zone 20 through the convection port 111 for sedimentation and filtration, and then discharged into the final sedimentation zone 30 through the convection port 111 to form new mud. In this way, the mud effect is ensured by three-stage sedimentation.
[0048] In construction step 5), a slurry making platform 120 is built on the final sedimentation tank, and an air compressor is installed on the slurry making platform 120, which injects air into the new mud in the final sedimentation area 30 for stirring. In this way, fresh mud can be prepared in time on the slurry making platform 120, and air can be injected into the bottom of the final sedimentation tank by the air compressor to fully stir the mud.
[0049] In construction step 5), a slurry discharge platform 130 is built on the final sedimentation area 30, and a slurry discharge pump is provided on the slurry discharge platform 130, and the slurry discharge pump discharges the new slurry from the final sedimentation area 30. In this way, by discharging the new slurry and pumping it into the pile hole, the fluidity and slag carrying capacity of the new slurry are improved, and the hole cleaning efficiency is improved.
[0050] In this embodiment, in the construction step 5), an overflow limiting dike is provided at the end of the final sedimentation area 30, and the overflow limiting dike limits the overflow of new mud in the final sedimentation area 30. In this way, the overflow of new mud is avoided.
[0051] Specifically, in construction step 4), the concrete layer includes a concrete cushion layer 101 and a concrete surface layer 103, and the concrete cushion layer 101 is cast on the compacted layer, and the concrete cushion layer 101 is integrated with the compacted layer;
[0052] After laying the steel mesh layer 102 on the concrete cushion layer 101, a concrete surface layer 103 is poured on the concrete cushion layer 101. The concrete cushion layer 101, the steel mesh layer 102 and the concrete surface layer 103 are combined to form an integrated concrete layer. In this way, the bearing capacity is improved by the concrete cushion layer 101.
[0053] In construction step 4), the two sides of the mud pool 100 are respectively cast to form a water retaining dam 200, and the two sides of the steel mesh layer 102 have side portions, which extend into the water retaining dam 200 and are integrated with the water retaining dam 200;
[0054] The end of the side portion is connected to a side axis 210, and the side portion is arranged in a winding shape around the side axis. The side axis 210 is formed in the middle of the water retaining dam 200, and the entire side portion is built into the water retaining dam 200. In this way, the water retaining dam 200 prevents the mud from overflowing out of the mud pool 100 through the side, and prevents the external liquid from flowing into the mud pool 100. The connection between the water retaining dam 200 and the mud pool 100 is strengthened by the design of the side portion, thereby improving the overall strength of the water retaining dam 200.
[0055] In construction step 4), a plurality of recessed holes 1000 are formed on the compacted layer, and the plurality of recessed holes 1000 are distributed throughout the entire compacted layer, and the bottom of the concrete cushion layer 101 is embedded in the recessed holes 1000 to form an integrated structure with the compacted layer;
[0056] A plurality of pins 104 are provided on the steel mesh layer 102. The plurality of pins 104 are arranged in multiple rows on the steel mesh layer 102 to form a plurality of rows of pins 104. The plurality of rows of pins 104 are arranged at intervals along the length direction of the mud pool 100. The rows of pins 104 are extended along the width direction of the mud pool 100.
[0057] A plurality of pins 104 are inserted into the concrete cushion layer 101, forming an integrated structure of the steel mesh layer 102 and the concrete cushion layer 101; the steel mesh layer 102 is in a tensioned state along the width direction of the mud pool 100, and the steel mesh has a spacer 1020 located between adjacent rows of pins 104, and the spacer 1020 is in a relaxed folded shape along the length direction of the mud pool 100. In this way, the relaxed folded spacer 1020 makes the entire concrete surface layer 103 and the steel mesh layer 102 inside it have better flexibility when subjected to external pressure. This flexibility can reduce cracking or damage caused by stress concentration, thereby improving the overall durability of the mud pool 100. The steel mesh layer 102, the concrete cushion layer 101, and the concrete surface layer 103 form an integrated structure through structures such as the pins 104, which enhances the overall stability.
[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A method for constructing a mud circulation system for a coastal tidal liquefaction site, characterized in that: The construction steps include: 1) Level the construction site; 2) Excavating at the construction site to form a strip-shaped mud pool; 3) The top of the mud pool has a top opening, and the mud pool has an enclosure wall, and the enclosure wall is compacted to form a compacted layer; 4) pouring a concrete layer on the compacted layer, the concrete layer and the compacted layer are combined to form a whole, and a steel mesh layer is built in the concrete layer, and the steel mesh layer is laid flat along the extension direction of the enclosed wall; 5) A plurality of partition walls are constructed and formed in the mud pool, and the plurality of partition walls are arranged at intervals along the length direction of the mud pool. The plurality of partition walls divide the mud pool into a plurality of sedimentation areas. The old mud discharged from the pile hole is sequentially filtered through the sedimentation of the plurality of sedimentation areas to form new mud for discharge into the pile hole. Convection ports are provided on the partition walls, and adjacent sedimentation areas are connected through the convection ports.
2. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to claim 1, characterized in that: In the construction step 5), the convection openings of adjacent partition walls are staggered along the width direction of the mud pool.
3. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to claim 1, characterized in that: Along the flow direction of the old sludge in the sludge pool, the heights of the convection ports in the plurality of partition walls decrease in sequence.
4. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to claim 1, characterized in that: In the construction step 5), along the flow direction of the old mud in the mud pool, the multiple sedimentation areas include a first-stage sedimentation area, an intermediate sedimentation area and a final sedimentation area in sequence. The old mud is discharged into the first-stage sedimentation area for sedimentation and filtration, and then discharged into the intermediate sedimentation area through the convection port for sedimentation and filtration, and then discharged into the final sedimentation area through the convection port to form new mud.
5. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to claim 1, characterized in that: In the construction step 5), a slurry making platform is built on the final sedimentation tank, and an air compressor is arranged on the slurry making platform. The air compressor injects air into the new slurry in the final sedimentation area for agitation.
6. The method for constructing a slurry circulation system for a coastal tidal liquefaction site as claimed in claim 5, characterized in that: In the construction step 5), a slurry discharge platform is built on the final sedimentation area, and the slurry discharge platform is provided with a slurry discharge pump, and the slurry discharge pump discharges new slurry from the final sedimentation area.
7. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to claim 5, characterized in that: In the construction step 5), an overflow limiting dike is provided at the end of the final sedimentation zone, and the overflow limiting dike limits the overflow of new slurry in the final sedimentation zone.
8. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to any one of claims 1 to 7, characterized in that: In the construction step 4), the concrete layer includes a concrete cushion layer and a concrete surface layer, and the concrete cushion layer is cast on the compacted layer, and the concrete cushion layer is integrated with the compacted layer; After laying the steel mesh layer on the concrete cushion layer, a concrete surface layer is poured on the concrete cushion layer, and the concrete cushion layer, the steel mesh layer and the concrete surface layer are combined to form an integrated concrete layer.
9. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to any one of claims 1 to 7, characterized in that: In the construction step 4), the two sides of the mud pool are respectively cast to form a water retaining dam, and the two sides of the steel mesh layer have side portions, and the side portions extend into the water retaining dam and are integrated with the water retaining dam; The end of the side portion is connected with a side axis, and the side portion is arranged in a winding shape around the side axis. The side axis is formed in the middle of the water retaining dam, and the entire side portion is built in the water retaining dam.
10. The method for constructing a slurry circulation system for a coastal tidal liquefaction site according to claim 8, characterized in that: In the construction step 4), a plurality of recessed holes are formed on the compacted layer, and the plurality of recessed holes are distributed throughout the compacted layer, and the bottom of the concrete cushion layer is embedded in the recessed holes to form an integrated structure with the compacted layer; The steel mesh layer is provided with a plurality of pins, the plurality of pins are arranged in a plurality of rows on the steel mesh layer to form a plurality of pin rows, the plurality of pin rows are arranged at intervals along the length direction of the mud pool, and the pin rows are extended along the width direction of the mud pool; A plurality of the pins are inserted into the concrete cushion layer to form an integrated structure of the steel mesh layer and the concrete cushion layer; the steel mesh layer is in a tensioned state along the width direction of the mud pool, and the steel mesh has a spacer located between adjacent rows of pins, and the spacer is in a relaxed folded state along the length direction of the mud pool.