CN220414289U - Novel double-row PC construction method pile cofferdam structure suitable for deep mucky soil foundation - Google Patents
Novel double-row PC construction method pile cofferdam structure suitable for deep mucky soil foundation Download PDFInfo
- Publication number
- CN220414289U CN220414289U CN202321817989.6U CN202321817989U CN220414289U CN 220414289 U CN220414289 U CN 220414289U CN 202321817989 U CN202321817989 U CN 202321817989U CN 220414289 U CN220414289 U CN 220414289U
- Authority
- CN
- China
- Prior art keywords
- steel sheet
- cofferdam
- steel
- pile
- sheet piles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 239000002689 soil Substances 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 172
- 239000010959 steel Substances 0.000 claims abstract description 172
- 238000000034 method Methods 0.000 claims description 10
- 238000009412 basement excavation Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model relates to the technical field of cofferdam construction, and discloses a novel double-row PC construction method pile cofferdam structure suitable for a deep mucky soil foundation. When the combined type cofferdam is used, a plurality of steel sheet piles and steel pipe piles are installed in a staggered and matched mode to form a row of cofferdam units, and the two rows of cofferdam units are fixedly connected through the two layers of steel pull rods.
Description
Technical Field
The utility model relates to the technical field of cofferdam construction, in particular to a novel double-row PC construction method pile cofferdam structure suitable for a deep mucky soil foundation.
Background
The steel sheet pile is a prefabricated steel member formed by processing measures such as factory cold rolling or hot rolling, and mainly has Z-shaped, U-shaped, H-shaped, linear, hat-shaped and other cross-section forms, wherein the U-shaped steel sheet pile is designed by Danish engineering Shi Lasen, also called Lasen-shaped steel sheet pile, and is a cross-section form widely applied at present. The steel sheet pile component both ends set up the hasp, and the fore shaft mainly contains negative and positive fore shaft, annular fore shaft and three kinds of fore shaft of cover formula, carries out interlock connection each other through the both ends hasp of adjacent component, can form confined space, keeps off water in the outside. The steel sheet pile has higher strength, is easy to drive into a soil layer, has better flexibility compared with other cofferdam modes such as a soil cofferdam and the like, reduces the soil excavation amount, and is favorable for saving soil and protecting resources.
The simplest engineering application form of the steel sheet pile is a single-row steel sheet pile, but the single-row steel sheet pile has lower supporting rigidity, so that the steel sheet pile deforms and the surrounding soil body is larger under the influence of soil body excavation and drainage, and the purpose of effectively controlling the deformation of the steel sheet pile cannot be achieved only by increasing the soil penetration depth of the steel sheet pile. For this purpose, the engineering designer adopts two improved methods, the first method is to add anchor rods and internal supports to reduce the horizontal displacement of the supporting structure. However, for cofferdams or foundation pits with larger width, the inner support span is also larger, and temporary upright posts are required to be arranged under the inner support to ensure engineering safety, which brings inconvenience in construction and high work cost; the second method is to increase the rigidity of the steel sheet pile itself, and the methods are mainly classified into three types of measures, (1) steel sheet piles with larger section modulus are adopted, and (2) a plurality of steel sheet piles are combined to construct a combined steel sheet pile structure, such as H-type and Z-type combined steel sheet piles and H-type and U-type combined steel sheet piles. For the second method, the first and second measures have disadvantages, and the first measure has the advantages that the resistance to driving into the stratum is increased due to the increase of the section of the steel sheet pile, the construction efficiency is reduced, and a large number of specially-made large-section steel sheet piles are difficult to obtain in a short time; the second type of measure is that, when combining a plurality of steel sheet piles, a specific guide frame needs to be manufactured for convenient construction, which increases construction period and difficulty.
The construction of cofferdam engineering is also encountered in the hydraulic engineering construction of coastal areas in China, because the foundation layers of coastal areas are poor, deep silt foundations exist in a plurality of areas, the depth of the silt foundation reaches more than 10.0m or 15.0m, and the cofferdam engineering adopts double-row steel sheet pile cofferdams or combined cofferdams, but the depth of the steel sheet piles to be buried is designed to be large due to the poor foundations so as to ensure the stability of the cofferdam structure. The cofferdam structure design under the condition of the deep mucky soil foundation has the defects of low structural rigidity, inconvenient construction, high manufacturing cost and the like.
Therefore, the existing steel sheet piles have the defects of overlarge depth, difficult driving, difficult dismantling, lower economic performance and the like, and the single-row steel sheet piles have lower supporting rigidity, so that the problems of deformation of the steel sheet piles and larger surrounding soil displacement under the influence of soil excavation and drainage are caused.
Disclosure of Invention
The utility model aims to solve the problems that the existing steel sheet piles are overlarge in depth, difficult to drive in, difficult to dismantle, low in economic performance and the like, and the single-row steel sheet piles are low in supporting rigidity, so that the steel sheet piles deform and the surrounding soil is large in displacement under the influence of soil excavation and drainage.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the novel double-row PC construction method pile cofferdam structure suitable for the deep mucky soil foundation comprises two rows of cofferdam units, wherein the two rows of cofferdam units are oppositely arranged, each of the two rows of cofferdam units comprises a plurality of cofferdam subunits, each of the cofferdam subunits comprises a steel pipe pile and three steel sheet piles, each of the three steel sheet piles is arranged on one side of the steel pipe pile, and a steel pull rod is arranged between the two cofferdam subunits which are oppositely arranged; the cofferdam unit is a PC construction method pile cofferdam structure;
the steel pipe pile comprises a main steel pipe, and side buckling strips are fixedly arranged on two sides of the main steel pipe;
the steel sheet piles comprise webs, two sides of each web are provided with side plates, the side ends of two side plates are provided with locking strips, and the three steel sheet piles are arranged at intervals in opposite directions in sequence;
and two adjacent cofferdam subunits are buckled and connected with the locking strips through the adjacent side locking strips.
Preferably, three steel sheet piles are sequentially meshed and fixed through locking strips of two adjacent steel sheet piles, and the two steel sheet piles at two ends of the cofferdam subunit are respectively meshed and fixed through the locking strips and side locking strips of two steel pipe piles.
Preferably, the two rows of cofferdam units are connected through a plurality of two-layer steel pull rods, two slotted holes are formed in the central axis of the middle steel sheet pile in every three steel sheet piles, the two-layer steel pull rods are respectively located in the two slotted holes, each steel pull rod comprises a pull rod, two ends of each pull rod are respectively inserted into the two oppositely arranged slotted holes, anchor bolts are respectively installed at two ends of each pull rod, and two ends of each pull rod are fixedly installed on the two oppositely arranged steel sheet piles through the two anchor bolts.
Preferably, the longitudinal depth of the steel pipe pile is greater than the longitudinal depth of the steel sheet pile.
Preferably, the angle between the opening directions of the side buckling strip and the locking strip is 30-60 degrees.
Compared with the prior art, the utility model has the following beneficial effects:
1. when the utility model is used, a plurality of steel sheet piles and steel pipe piles are installed in a staggered and matched mode, for example, three steel sheet piles are arranged between two steel pipe piles, adjacent steel sheet piles are meshed and fixed through the locking strips, the steel pipe piles and the steel sheet piles are meshed and fixed with each other through the side locking strips, a row of cofferdam units can be formed, and preferably, the longitudinal depth of the steel pipe piles is larger than that of the steel sheet piles, compared with the existing steel sheet pile support, the steel pipe piles can be easily driven into deeper foundations, the problem that the steel sheet piles are not easy to drive into deep foundations is effectively solved, and the cost is saved to a certain extent.
2. The double-row cofferdam units are connected through two layers of steel pull rods, wherein the steel pull rods and the steel sheet piles are fixed by anchor bolts, a plurality of slotted holes are formed in the middle of each three steel sheet piles, the steel pull rods are arranged in the middle of each three steel sheet piles, and compared with the existing single-row steel sheet pile support, the double-row cofferdam units combine soil bodies between the steel sheet piles and the steel sheet piles, so that a combined support structure with higher rigidity can be formed, and engineering safety can be promoted.
None of the parts of the device are the same as or can be implemented using prior art.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is an enlarged view of the portion a in fig. 1 according to the present utility model.
Fig. 3 is an overall top view of the present utility model.
Fig. 4 is an enlarged view of the portion B of fig. 3 according to the present utility model.
In the figure: 100. steel sheet piles; 101. a web; 102. a side plate; 103. a locking strip; 200. a steel pipe pile; 201. a main steel pipe; 202. a side buckle strip; 300. a steel tie rod; 301. a pull rod; 302. an anchor bolt.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
1-4, a novel double-row PC construction method pile cofferdam structure suitable for deep mucky soil foundations comprises two rows of cofferdam units, wherein the two rows of cofferdam units are oppositely arranged, each of the two rows of cofferdam units comprises a plurality of cofferdam subunits, each of the plurality of cofferdam subunits comprises a steel pipe pile 200 and three steel sheet piles 100, each of the three steel sheet piles 100 is arranged on one side of the steel pipe pile 200, and a steel pull rod 300 is arranged between the two cofferdam subunits which are oppositely arranged; the cofferdam unit is a PC construction method pile cofferdam structure;
the steel pipe pile 200 comprises a main steel pipe 201, and side buckling strips 202 are fixedly arranged on two sides of the main steel pipe 201;
the steel sheet pile 100 comprises a web plate 101, two sides of the web plate 101 are provided with side plates 102, the side ends of the two side plates 102 are provided with locking strips 103, and three steel sheet piles 100 are arranged at intervals in opposite directions in sequence;
two adjacent cofferdam subunits are buckled and connected with the buckling strip 103 through the adjacent side buckling strips 202, a row of PC construction method piles can be formed by a plurality of cofferdam subunits during installation, and finally, a steel pipe pile 200 is connected independently.
The three steel sheet piles 100 are sequentially meshed and fixed through the locking strips 103 of the two adjacent steel sheet piles 100, and the two steel sheet piles 100 at the two ends of the cofferdam subunit are respectively meshed and fixed with the side locking strips 202 of the two steel pipe piles 200 through the locking strips 103.
Two rows of cofferdam units are connected through a plurality of two-layer steel tie rods 300, two slotted holes are formed in the central axis of the middle steel sheet pile 100 in every three steel sheet piles 100, the two-layer steel tie rods 300 are respectively located in the two slotted holes, each steel tie rod 300 comprises a tie rod 301, two ends of each tie rod 301 are respectively inserted into the two oppositely arranged slotted holes, anchor bolts 302 are arranged at two ends of each tie rod 301, two ends of each tie rod 301 are fixedly arranged on the two oppositely arranged steel sheet piles 100 through the two anchor bolts 302, after the steel sheet piles 100 and the steel sheet piles 200 are driven into a foundation through a pile driver, the steel tie rods 300 are driven into the direction of the steel sheet piles 100, two rows of PC construction method piles are connected, and finally the two rows of PC construction method piles are fixed through the anchor bolts 302.
The double-row cofferdam units are connected through two layers of steel tie rods 300, wherein the steel tie rods 300 and the steel sheet piles 100 are fixed by anchor bolts 302, a plurality of slotted holes are formed in the middle of each three steel sheet piles 100, the steel tie rods 300 are arranged in the middle of each three steel sheet piles 100, and compared with the existing single-row steel sheet piles 100 for supporting, the double-row cofferdam units combine soil bodies between the steel sheet piles 100 and the steel sheet piles 100, so that a combined supporting structure with higher rigidity can be formed, and engineering safety can be promoted.
The longitudinal depth of the steel pipe pile 200 is greater than that of the steel sheet pile 100, the distance between two rows of cofferdam units is 10-15 meters, and plain filling soil is added between the two rows of cofferdam units; when the steel pipe pile 100 is used, a plurality of steel pipe piles 100 and the steel pipe piles 200 are installed in a staggered fit mode, for example, three steel pipe piles 100 are arranged between two steel pipe piles 200, adjacent steel pipe piles 100 are meshed and fixed through the locking strips 103, the steel pipe piles 200 and the steel pipe piles 100 are meshed and fixed with each other through the side locking strips 202 and the locking strips 103, a row of cofferdam units can be formed, and preferably, the longitudinal depth of each steel pipe pile 200 is greater than the longitudinal depth of each steel pipe pile 100, compared with the existing steel pipe pile 100 for supporting, the steel pipe piles 200 can be easily driven into deeper foundations, the problem that the steel pipe piles 100 are not easy to drive into deep foundations is effectively solved, and the cost is saved to a certain extent.
The angle between the opening directions of the side buckling strip 202 and the buckling strip 103 is 30-60 degrees.
Working principle: in the installation, the steel sheet pile 100 and the steel pipe pile 200 are generally installed in the vertical direction by a pile driver, and in this embodiment, the longitudinal depth of the steel sheet pile 100 is 18.0m, the longitudinal depth of the steel pipe pile 200 is 27.0m, and the interval between two rows of cofferdam units is 12.0m. The diameter of the steel pipe is 630mm, and the wall thickness is 14mm. As shown in fig. 1, three steel sheet piles 100 are provided between two steel pipe piles 200, the steel pipe piles 200 and the steel sheet piles 100 are connected to each other, and the angle between the opening direction of the side locking strip 202 and the locking strip 103 is 35 degrees. The two rows of cofferdam units are connected through two layers of steel pull rods 300, the heights of the steel pull rods 300 are 3.0m and-0.50 m respectively, the steel pull rods 300 are HRB400 steel pull rods 300 with the diameters of 50mm, and plain filling soil is added between the two rows of cofferdam units, and the double-row PC construction method piles combine soil bodies between the steel sheet piles 100 and the steel pipe piles 200, so that a combined supporting structure with higher rigidity is effectively formed.
The PC construction method piles comprise a plurality of steel sheet piles 100 which are connected and distributed, the adjacent steel sheet piles 100 are connected and fixed by adopting steel pipe piles 200, the steel sheet piles 100 and the steel pipe piles 200 are sequentially meshed, so that the PC construction method piles are formed, two rows of PC construction method piles are arranged in front and back, the two rows of PC construction method piles are connected through steel tie rods 300, soil is filled between the two rows of construction method piles, and therefore the combined novel double-row PC construction method pile cofferdam supporting structure with high rigidity is formed. Compared with the multi-steel sheet pile 100 combined cofferdam structure adopted under the condition of the existing deep muddy soil foundation, the novel double-row PC construction method pile combined supporting cofferdam structure provided by the utility model can effectively increase the rigidity of the supporting structure and has the advantages of convenience in construction, low construction cost, good integrity and water stopping performance and the like.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. Novel double PC worker method stake cofferdam structure suitable for deep mucky soil foundation, its characterized in that: the two rows of cofferdam units are oppositely arranged, each of the two rows of cofferdam units comprises a plurality of cofferdam subunits, each of the plurality of cofferdam subunits comprises a steel pipe pile (200) and three steel sheet piles (100), the three steel sheet piles (100) are arranged on one side of the steel pipe pile (200), and steel pull rods (300) are arranged between the two cofferdam subunits which are oppositely arranged;
the steel pipe pile (200) comprises a main steel pipe (201), and side buckling strips (202) are fixedly arranged on two sides of the main steel pipe (201);
the steel sheet piles (100) comprise webs (101), side plates (102) are arranged on two sides of each web (101), locking strips (103) are arranged at side ends of two side plates (102), and three steel sheet piles (100) are arranged at intervals in opposite directions in sequence;
two adjacent cofferdam subunits are buckled and connected with the locking strips (103) through the adjacent side locking strips (202).
2. The novel double-row PC construction pile cofferdam structure applicable to deep mucky soil foundations of claim 1, wherein: three steel sheet piles (100) are sequentially meshed and fixed through locking strips (103) of two adjacent steel sheet piles (100), and the two steel sheet piles (100) at two ends of the cofferdam subunit are respectively meshed and fixed with side locking strips (202) of two steel pipe piles (200) through the locking strips (103).
3. The novel double-row PC construction pile cofferdam structure applicable to deep mucky soil foundations of claim 1, wherein: two rows are connected through a plurality of two-layer steel pull rod (300), every three two slotted holes are all formed in the central axis of the middle steel sheet pile (100) in the steel sheet pile (100), the two-layer steel pull rod (300) is respectively located in the two slotted holes, the steel pull rod (300) comprises a pull rod (301), two ends of the pull rod (301) are respectively inserted into the two oppositely arranged slotted holes, anchor bolts (302) are respectively installed at two ends of the pull rod (301), and two ends of the pull rod (301) are fixedly installed on the two oppositely arranged steel sheet piles (100) through the two anchor bolts (302).
4. The novel double-row PC construction pile cofferdam structure applicable to deep mucky soil foundations of claim 1, wherein: the longitudinal depth of the steel pipe pile (200) is greater than that of the steel sheet pile (100).
5. The novel double-row PC construction pile cofferdam structure applicable to deep mucky soil foundations of claim 1, wherein: the angle between the opening directions of the side buckling strip (202) and the locking strip (103) is 30-60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321817989.6U CN220414289U (en) | 2023-07-12 | 2023-07-12 | Novel double-row PC construction method pile cofferdam structure suitable for deep mucky soil foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321817989.6U CN220414289U (en) | 2023-07-12 | 2023-07-12 | Novel double-row PC construction method pile cofferdam structure suitable for deep mucky soil foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220414289U true CN220414289U (en) | 2024-01-30 |
Family
ID=89647405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321817989.6U Active CN220414289U (en) | 2023-07-12 | 2023-07-12 | Novel double-row PC construction method pile cofferdam structure suitable for deep mucky soil foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220414289U (en) |
-
2023
- 2023-07-12 CN CN202321817989.6U patent/CN220414289U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103074898B (en) | Multi-row pile foundation pit support structure and construction method thereof | |
| CN207109795U (en) | A kind of recyclable HC engineering methods steel diaphram wall | |
| CN201250408Y (en) | Recovery type steel structure foundation pit exterior-protected device | |
| CN203096745U (en) | Multi-row pile foundation pit supporting structure | |
| CN220414289U (en) | Novel double-row PC construction method pile cofferdam structure suitable for deep mucky soil foundation | |
| CN214883687U (en) | Foundation pit supporting structure | |
| CN203530959U (en) | High-strength underground diaphragm wall | |
| CN115288151A (en) | Assembled portal rigid frame structure supporting system and construction method thereof | |
| CN210529711U (en) | Pre-arranged inclined supporting structure in pit before deep foundation pit excavation | |
| CN113513026A (en) | Soft soil foundation deep foundation pit pile end rear anchoring combined steel sheet pile and construction method thereof | |
| CN114411709A (en) | Novel steel anchor pile | |
| CN210507458U (en) | Vertical anchor supporting system that draws of foundation ditch | |
| RU142650U1 (en) | PLAIN WALL USING I-BEAM AND T-SHEET PROFILES (OPTIONS) | |
| CN111877313A (en) | Pile foundation pit fore shaft steel pipe | |
| CN203096746U (en) | Reinforced rib soil restraining composite supporting structure | |
| CN219157690U (en) | Double PC (polycarbonate) construction method combined pile enclosure structure | |
| CN215367347U (en) | Clamping groove type combined steel sheet pile cofferdam suitable for soft soil layer | |
| CN116289881A (en) | Stirring pile reinforced top rigid-connection inclined double-row steel sheet pile and construction method thereof | |
| CN215669466U (en) | Anti-slip corrugated steel pipe pile | |
| CN214194098U (en) | Integral abutment-H-shaped steel pile node anti-seismic structure locally using rubber concrete | |
| CN219948521U (en) | Permanently-combined dock wall structure | |
| CN217629952U (en) | Larsen steel sheet pile and miniature steel-pipe pile combined foundation pit supporting structure | |
| CN212153396U (en) | Outer T type roof beam supporting construction of foundation ditch hole | |
| CN219470986U (en) | Self-water-stopping, impact-resistant and damp-blocking cofferdam structure for deep water soft soil foundation | |
| CN219621786U (en) | Elevator pit enclosure structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |