Open caisson cylinder wall structure capable of reducing frictional resistance
By setting rigid plastic templates on the outside of the caisson wall and designing densely packed grooves on the inside, the problems of high frictional resistance and uneven sinking when the cutting edge is not expanded outward were solved, achieving a more efficient and stable sinking process and reducing construction time.
Patent Information
- Application Number
- CN202423130876.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-18
AI Technical Summary
In caisson construction, if the cutting edge is not extended outward, the frictional resistance is relatively large, leading to uneven sinking, especially in cases of greater caisson depth. In existing technologies, the frictional resistance between the cutting edge and the caisson depth is large during sinking, which can easily lead to uneven sinking. This is particularly true when the caisson is deep and the inner diameter is small, as the frictional resistance is even greater during backfilling, making it difficult to complete the sinking.
A sinking template was installed on the outside of the first section of the cylinder wall. The template was made of rigid plastic and had dense horizontal grooves on the inside. The groove design and template thickness made it protrude outward to reduce contact with the soil. The surface of the rigid plastic template was smooth and had good rigidity, which reduced frictional resistance. The template was also stabilized by reasonably designing the groove depth and opening height, thus solving the stability problem of the first section of the cylinder wall.
By setting a sinking template on the outside of the first section of the cylinder wall, and utilizing its thickness to make it protrude outward relative to the upper cylinder wall, only the sinking template contacts the soil during the sinking process, avoiding contact between the first section of the cylinder wall and the upper cylinder wall and the soil. This reduces the frictional resistance between the caisson cylinder wall and the soil, improves the sinking efficiency, and further reduces the frictional resistance through the smoothness and rigidity of the rigid plastic template, ensuring the uniformity and stability of the sinking.
Smart Images
Figure CN223675373U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the sinking well construction technical field especially is concerned about a kind of sinking well cylinder wall structure that reduces friction resistance. BACKGROUND
[0002] In the industrial production field, when some deep concrete structures are built underground for process requirements, such as circulating water sedimentation tank, cooling pit or equipment pit, etc., the sinking well method is usually used for construction. During sinking well construction, the concrete is poured by segmental binding and formwork, then the soil layer in the well is excavated, and the structure is sunk by relying on its own weight to cut soil, until it is sunk in place, and then the bottom is sealed. The resistance overcome by the sinking well is mainly the frictional resistance between the well body and the surrounding soil. In order to reduce the frictional resistance during sinking, the existing technology usually expands the blade foot by 15-20mm, so that only the blade foot is in direct contact with the soil during sinking, and there is a gap of 15-20mm between the well body and the soil. Although this method can reduce the frictional resistance, it cannot be used under some special process requirements, where the blade foot of the sinking well is flush with the well body. Especially under the working conditions of small inner diameter and large well depth, soil backfilling is needed during sinking, the soil and the well body form a hoop effect, the frictional resistance is greater, and uneven sinking and deviation sinking phenomenon are easily caused, making sinking more difficult to complete. SUMMARY
[0003] To solve the above technical problems, the utility model provides a sinking well cylinder wall structure that reduces frictional resistance, which solves the problem of large friction and uneven sinking during sinking construction of the sinking well cylinder wall structure without expanding the blade foot.
[0004] The technical scheme adopted by the utility model is as follows: a sinking well cylinder wall structure that reduces frictional resistance, comprising a first section cylinder wall and a plurality of upper section cylinder walls arranged above the first section cylinder wall, the first section cylinder wall comprising a first section main body and a blade foot arranged at the bottom end of the first section main body, the upper end of the blade foot being flush with the first section main body; a sinking formwork is arranged on the outer side of the first section cylinder wall, for concrete pouring of the first section cylinder wall and reducing frictional resistance during sinking.
[0005] Further, the sinking formwork is a hard plastic formwork.
[0006] Further, the sinking formwork is integrally shaped, and the inner side of the sinking formwork is densely provided with horizontal grooves.
[0007] Further, the depth of the horizontal grooves is 3-5mm.
[0008] Further, the opening size of the horizontal grooves in the height direction is not less than 10mm.
[0009] Further, the interval between adjacent horizontal grooves is not more than 20mm.
[0010] Further, the thickness of the sinking formwork is 15-20mm.
[0011] Further, the sinking formwork is connected by several single formworks.
[0012] The utility model has the advantages and positive effects that:
[0013] The sinking formwork is provided on the outer side of the first section cylinder wall, and the sinking formwork protrudes outward relative to the upper cylinder wall by the thickness, so that only the sinking formwork contacts the soil during sinking, and the first section cylinder wall and the upper cylinder wall avoid contacting the soil, thereby reducing the frictional resistance between the sinking well cylinder wall and the soil and improving the sinking efficiency; the sinking formwork is made of hard plastic, and the hard plastic formwork has smooth surface and good rigidity and strength, so that the frictional resistance between the sinking formwork and the surrounding soil is reduced, and the sinking uniformity is better controlled; the depth and opening height of the horizontal grooves on the sinking formwork are reasonably designed, so that the sinking formwork is stably fixed on the outer side of the first section cylinder wall, the overall stability of the outer structure of the first section cylinder wall is improved, and the stability during sinking of the first section cylinder wall is further ensured; meanwhile, the sinking formwork can also be used as the concrete pouring outer formwork of the first section cylinder wall, and is installed synchronously during construction of the first section cylinder wall, so that the sinking formwork does not need to be additionally installed and removed, and the construction period is effectively saved. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 is a first section cylinder wall structure schematic view of one specific embodiment of the utility model;
[0015] Fig. 2 is a horizontal groove structure schematic view of one specific embodiment of the utility model;
[0016] Fig. 3 is a construction method schematic view of one specific embodiment of the utility model.
[0017] In the drawings:
[0018] 1, first section cylinder wall 11, blade foot 2, sinking formwork
[0019] 21, horizontal groove 3, foundation pit 4, second section cylinder wall DETAILED DESCRIPTION
[0020] The embodiments of the utility model will be described below with reference to the drawings.
[0021] As Figs. 1-3The utility model provides a reduce friction resistance caisson cylinder wall structure, including first section cylinder wall 1, and a plurality of section upper cylinder wall are set in first section cylinder wall 1 upper, first section cylinder wall 1 includes first section main part and sets up the blade foot 11 of first section main part bottom end, and the blade foot 11 upper end is flush with first section main part, first section cylinder wall 1 outside is equipped with sinking formwork 2, is used for the concrete pouring of first section cylinder wall 1 and reduces the frictional resistance when sinking.
[0022] The utility model discloses through setting sinking formwork 2 on the outside of first section cylinder wall 1, utilize its thickness to make it outward bulge relative to upper cylinder wall, make only sinking formwork 2 contact with the earth mass in the sinking process, and first section cylinder wall 1 and upper cylinder wall avoid contacting with the earth mass, thereby reduce the frictional resistance between caisson cylinder wall and the earth mass, improve sinking efficiency, in addition, sinking formwork 2 still as the concrete pouring outside formwork of first section cylinder wall 1, when first section cylinder wall 1 construction, synchronous installation is needed additional installation time, thereby effectively saved the construction period.
[0023] Preferably, sinking formwork 2 is hard plastic formwork. The surface of the hard plastic formwork is smooth and clean, far exceeding the smoothness and cleanliness of the concrete structure surface in the prior art, so its friction coefficient is much lower than that of the concrete structure surface, reducing the frictional resistance with the surrounding earth mass, and better controlling the uniformity and balance of sinking.
[0024] The sinking formwork 2 made of hard plastic in the utility model has good adaptability and can be processed into various shapes according to requirements to meet the requirements of different building formworks; the sinking formwork 2 in the utility model is integrally formed, and the integrally formed process can maximize the rigidity and strength of the formwork, can resist the lateral pressure during concrete pouring and the upward frictional force during sinking, is not easy to deform and wear, and thus effectively protects the caisson cylinder wall. In addition, as shown in the drawings, dense horizontal grooves 21 are arranged on the inner side of the sinking formwork 2, so that corresponding protrusions are formed on the outer side of the first section cylinder wall 1, the protrusions are tightly connected with the horizontal grooves 21, so as to resist the upward extrusion force transmitted by the sinking formwork 2 during sinking, ensure that the sinking formwork 2 is stably fixed on the outer side of the first section cylinder wall 1, and avoid relative displacement.
[0025] Preferably, the depth of the horizontal groove 21 is 3-5 mm. It can be understood that the depth of the horizontal groove 21 corresponds to the thickness direction of the sinking formwork 2, so that the horizontal plane of the protrusion extends radially along the first section cylinder wall 1 for 3-5 mm long, so as to ensure that the protrusion effectively supports the horizontal groove 21.
[0026] Further, the horizontal groove 21 has an opening size in the height direction of not less than 10 mm, so that the formed protrusion has a length in the height direction of not less than 10 mm, thereby enhancing the rigidity and load bearing capacity of the protrusion itself, and further improving the overall stability of the external structure of the first section cylinder wall 1, so that it can better withstand the extrusion force transmitted by the sinking formwork 2, and ensure stable and reliable sinking of the first section cylinder wall 1.
[0027] Further, the distance between adjacent horizontal grooves 21 is not more than 20 mm, so as to ensure sufficient bonding force between the concrete of the first section cylinder wall 1 and the sinking formwork 2, and further prevent relative displacement between them during sinking.
[0028] Further, the thickness of the sinking formwork 2 is 15-20 mm, so as to ensure that the rigidity and strength of the sinking formwork 2 meet the use requirements of concrete shaping and sinking.
[0029] In a specific embodiment, the sinking formwork 2 is made by splicing a plurality of single body formworks, which can precisely control the processing size of each single body formwork by designing the sinking formwork 2 to be split into a plurality of single body formworks and using hard plastic shaping, and tightly connecting these single body formworks by splicing to finally form a complete sinking formwork 2. This method is beneficial to reduce the overall processing cost, because the processing of single body formwork is relatively simple, and it can be more conveniently transported and installed, thereby improving the efficiency and convenience of engineering construction.
[0030] The construction method of the sinking well cylinder wall structure with reduced frictional resistance provided in the present application, as shown in Fig. 3 includes the following steps:
[0031] S1, manufacturing the sinking formwork 2;
[0032] The sinking formwork 2 is manufactured according to the external contour of the sinking well cylinder wall. Since the sinking well cylinder wall is constructed in sections according to the height, the sinking formwork 2 design drawing is first drawn according to the external contour of the sinking well cylinder wall before manufacturing, and is divided into a plurality of single body formworks according to certain principles, which are preferably of the same size and can be processed using the same mold, so as to reduce the manufacturing cost of the sinking formwork 2.
[0033] S2, excavating the foundation pit 3;
[0034] The foundation pit 3 is excavated at the designed position of the sinking well cylinder wall, and has the same depth as the height of the first section cylinder wall 1. After leveling, the foundation pit 3 cushion is poured, and the positioning center line and the external contour line of the sinking well cylinder wall are measured on the cushion.
[0035] S3, constructing the first section cylinder wall 1;
[0036] First, the first section of the cylinder wall 1 is reinforced, and the pull bolts are installed at the preset positions, preferably, the pull bolts are evenly arranged at a set interval;
[0037] Then, the sinking formwork 2 is installed on the outer contour line, and the inner formwork is installed on the inner contour line of the sinking cylinder wall, and the sinking formwork 2 and the inner formwork are fastened by the pull bolts; when the formwork and the inner formwork are set, the formwork support frame is used to support and reinforce them.
[0038] Then, the first section of the cylinder wall 1 is poured with concrete, and the vibration should be strengthened during pouring, but the sinking formwork 2 and the inner formwork should not be touched to prevent them from deforming or being damaged.
[0039] S4, the second section of the cylinder wall 4 is constructed;
[0040] The second section of the cylinder wall 4 is reinforced, and the corresponding outer formwork and inner formwork of the second section of the cylinder wall 4 are set, and the second section of the cylinder wall 4 is poured with concrete after being fastened by the pull bolts;
[0041] When the second section of the cylinder wall 4 reaches the strength, the inner formwork of the first section of the cylinder wall 1 and the inner formwork and the outer formwork of the second section of the cylinder wall 4 are removed; at the same time, the pull bolt heads in the first section of the cylinder wall 1 and the second section of the cylinder wall 4 are removed, and the outer surface of the sinking formwork 2 and the outer surface of the second section of the cylinder wall 4 are cleaned.
[0042] S5, sinking construction:
[0043] The earth excavation equipment is used to excavate the soil inside the sinking cylinder, and as the excavation proceeds, since the weight of the first section of the cylinder wall and the second section of the cylinder wall is greater than the frictional resistance between the sinking formwork 2 and the soil, they move downward synchronously until the first section of the cylinder wall 1 sinks to the designed position; preferably, the depth of the soil excavation and the height of the sinking are the same as the height of the first section of the cylinder wall 1, and after the sinking is completed, the first section of the cylinder wall 1 is completely sunk into the excavated soil.
[0044] S5, the third section of the cylinder wall is constructed:
[0045] According to the same method as in step S4, the third section of the cylinder wall is reinforced, and the corresponding outer formwork and inner formwork of the third section of the cylinder wall are set, and the third section of the cylinder wall is poured with concrete after being fastened; when the third section of the cylinder wall reaches the strength, the inner formwork and the outer formwork of the third section of the cylinder wall are removed;
[0046] S6, the sinking construction in step S5 and the construction of other upper cylinder walls are repeated until the sinking cylinder sinks to the designed position, the formwork support frame is removed, the soil is backfilled after the foundation pit 3 is cleaned, and then the construction of the sinking cylinder internal mechanism and facilities can be carried out.
[0047] Example one
[0048] The application discloses a caisson cylinder wall structure with reduced frictional resistance, which comprises a first section cylinder wall 1 and a plurality of upper section cylinder walls arranged above the first section cylinder wall 1, the height of the first section cylinder wall 1 and the upper section cylinder walls is 3 m, the inner wall diameter is 15 m, and the cylinder wall thickness is 500 mm; wherein the first section cylinder wall 1 comprises a first section main body and a blade foot 11 arranged at the bottom end of the first section main body, the blade foot 11 in the embodiment is arranged in an inverted trapezoidal shape, and the upper end of the blade foot 11 is flush with the first section main body; a sinking formwork 2 is arranged on the outer side of the first section cylinder wall 1, the sinking formwork 2 is made of a hard plastic formwork, the hard plastic formwork is integrally formed by using polyvinyl chloride (PVC) material, the thickness of the hard plastic formwork is 15 mm, a plurality of horizontal grooves 21 are arranged on the inner side of the hard plastic formwork, the depth of the horizontal grooves 21 is 3 mm, the opening height of the horizontal grooves 21 is 10 mm, and the spacing between adjacent horizontal grooves 21 is 20 mm; the sinking formwork 2 is formed by splicing a plurality of single formworks, and the sinking formwork 2 can match the external contour of the first section cylinder wall 1, and the height of the sinking formwork 2 after splicing is 3 m.
[0049] Embodiment two
[0050] The application discloses a construction method of a caisson cylinder wall structure with reduced frictional resistance, which is used for constructing the caisson cylinder wall structure in the embodiment one of the application.
[0051] In the embodiment, the inner side formwork and the outer side formwork are both made of wood formworks, the inner side formwork of the first section cylinder wall 1 is fastened and connected with the sinking formwork 2 through tension bolts and butterfly clamps, the spacing between the tension bolts is 600 mm, and the diameter of the tension bolts is 14 mm; the sinking height is 3 m during the sinking construction process.
[0052] The application sets the sinking formwork on the outer side of the first section cylinder wall, and the sinking formwork protrudes outward relative to the upper section cylinder wall due to the thickness, so that only the sinking formwork contacts the soil during the sinking process, and the first section cylinder wall and the upper section cylinder wall are prevented from contacting the soil, thereby reducing the frictional resistance between the caisson cylinder wall and the soil and improving the sinking efficiency; the sinking formwork is made of a hard plastic formwork, the surface of the hard plastic formwork is smooth, and the hard plastic formwork has good rigidity and strength, so that the frictional resistance between the sinking formwork and the surrounding soil is reduced, and the sinking uniformity and balance can be better controlled; the depth and the opening height of the horizontal grooves on the sinking formwork are reasonably designed, so that the sinking formwork is stably fixed on the outer side of the first section cylinder wall, the overall stability of the external structure of the first section cylinder wall is improved, and the stability during the sinking of the first section cylinder wall is further ensured; meanwhile, the sinking formwork can also be used as the concrete pouring outer side formwork of the first section cylinder wall, and the sinking formwork is simultaneously installed during the construction of the first section cylinder wall, so that the sinking formwork does not need to be additionally installed and removed, and the construction period is effectively saved.
[0053] The embodiments of the present application are described in detail above, but the content is only the preferred embodiments of the present application, and cannot be considered to limit the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage of the present application.
Claims
1. A caisson wall structure for reducing frictional resistance, comprising a first section wall, and a plurality of upper section walls arranged above the first section wall, characterized in that: The first section cylinder wall comprises a first section body and a blade foot arranged at the bottom end of the first section body, and the upper end of the blade foot is flush with the first section body; a sunken formwork is arranged on the outer side of the first section cylinder wall, which is used for concrete pouring of the first section cylinder wall and reducing frictional resistance during sinking.
2. A caisson wall structure for reducing frictional resistance according to claim 1, characterized in that: The sunken formwork is a hard plastic formwork.
3. A caisson wall structure for reducing frictional resistance according to claim 2, characterized in that: The sunken formwork is integrally formed, and the inner side of the sunken formwork is densely provided with horizontal grooves.
4. A caisson wall structure for reducing frictional resistance according to claim 3, characterized in that: The depth of the horizontal grooves is 3-5 mm.
5. A caisson wall structure according to claim 3 or 4, wherein: The opening size of the horizontal grooves in the height direction is not less than 10 mm.
6. A caisson wall structure according to claim 5, wherein: The distance between adjacent horizontal grooves is not greater than 20 mm.
7. A caisson wall structure for reducing frictional resistance according to any one of claims 1 to 4 and 6, characterized in that: The thickness of the sunken formwork is 15-20 mm.
8. A caisson wall structure according to claim 7, wherein: The sunken formwork is formed by splicing and connecting a plurality of single formworks.