Cofferdam lowering device and cofferdam lowering system thereof
Through the combined structure of support unit, deposition unit and space unit, the problem of position deviation during the deposition process of steel cofferdam is solved, and the precise positioning and stability of the cofferdam are achieved to ensure construction quality.
Patent Information
- Application Number
- CN202422762938.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Steel cofferdams are prone to position deviations during the decentralization process, which affects construction accuracy and stability.
The combined structure of the support unit, the lowering unit and the spacer unit is adopted, including a guard, a support beam, a jack, a vertical extension and a horizontal connecting member. By controlling the distance between the inner side of the cofferdam and the vertical extension member to be 9 to 11 cm, the position deviation is prevented.
Effectively prevent verticality errors caused by water flow and wind and waves during the desolation process, ensure that the cofferdam is accurately desolated to the correct position, and improve construction accuracy and stability.
Smart Images
Figure CN223293048U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of civil engineering, and in particular relates to a cofferdam lowering device and a cofferdam lowering system thereof. Background Art
[0002] A cofferdam is a temporary retaining structure used during water conservancy project construction to create permanent water conservancy facilities. Typically, a steel casing is installed at the pile foundation location, followed by drilling of the pile foundation. A cofferdam is then lowered around the steel casing to serve as a water retaining structure.
[0003] The cofferdam can be a steel cofferdam. It's typically lowered section by section using jacks. Specifically, a steel casing serves as the load-bearing structure, with load-bearing beams mounted on top. Jacks are attached to the beams and connected to the cofferdam floor via booms or steel strands. The jacks are used to gradually lower the booms or strands, adjusting their height. However, the steel cofferdam is prone to positional deviation during the lowering process. Utility Model Content
[0004] One of the purposes of the present application is to provide a cofferdam lowering device and a cofferdam lowering system thereof to avoid position deviation of the cofferdam during the lowering process.
[0005] To achieve the above-mentioned and other related purposes, the present application provides a cofferdam lowering device, comprising a supporting unit, a lowering unit, and a spacing unit;
[0006] The supporting unit includes a casing, the bottom of which is fixed in the riverbed, and the top of which extends out of the water surface for installing the lowering unit;
[0007] The lowering unit includes a support beam and a jack; the support beam is welded to the top of the casing, and the jack is welded to the top of the support beam and close to one side of the cofferdam;
[0008] The spacing unit includes a vertical extension member and a plurality of horizontal connecting members, wherein the vertical extension member is mounted on the side wall of the casing through the plurality of horizontal connecting members and is located on a side of the casing facing the cofferdam;
[0009] The length of the horizontal connecting member in the horizontal direction is such that the distance between the cofferdam purlin on the inner side of the cofferdam and the vertical extension member is 9 to 11 centimeters.
[0010] The present application also provides a cofferdam lowering system, comprising a plurality of the cofferdam lowering devices; wherein the casings in each of the cofferdam lowering devices are distributed along the inner circumference of the cofferdam.
[0011] This application has at least the following beneficial effects:
[0012] The cofferdam lowering device of the present application includes a spacing unit, which includes a horizontal connecting piece and a vertical extension piece. By controlling the horizontal length of the horizontal connecting piece, the distance between the cofferdam purlin on the inner side of the cofferdam and the vertical extension piece is 9 to 11 centimeters, thereby spacing the cofferdam during the lowering process to prevent the cofferdam from being affected by water flow and wind and waves, which may cause an increase in the verticality error of the cofferdam. In severe cases, the cofferdam may be stuck and cannot be lowered to the correct position. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0014] Figure 1 Schematic diagram of the installation structure of the cofferdam lowering device according to an embodiment of the present application;
[0015] Figure 2 1 is a top view of a cofferdam lowering device according to an embodiment of the present application;
[0016] Illustration:
[0017] 100 support unit; 11 casing; 200 lowering unit; 21 support beam; 22 jack; 300 spacing unit; 31 vertical extension piece; 32 horizontal connection piece; 34 supporting corbel; 400 cofferdam. DETAILED DESCRIPTION
[0018] The following describes the embodiments of the present application through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments. The details in the present application can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.
[0019] In the description of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0020] The utility model provides a cofferdam lowering device, which includes a supporting unit, a lowering unit, and a spacing unit;
[0021] The supporting unit includes a casing, the bottom of which is fixed in the riverbed, and the top of which extends out of the water surface for installing the lowering unit;
[0022] The lowering unit includes a support beam and a jack; the support beam is welded to the top of the casing, and the jack is welded to the top of the support beam and close to one side of the cofferdam;
[0023] The spacing unit includes a vertical extension member and a plurality of horizontal connecting members, wherein the vertical extension member is mounted on the side wall of the casing through the plurality of horizontal connecting members and is located on a side of the casing facing the cofferdam;
[0024] The length of the horizontal connecting member in the horizontal direction is such that the distance between the cofferdam purlin on the inner side of the cofferdam and the vertical extension member is 9 to 11 centimeters.
[0025] Optionally, there are no less than 5 horizontal connecting members.
[0026] Optionally, at least four of the horizontal connectors are located above the normal water level.
[0027] Optionally, in the vertical direction, the length of the vertical extension member is not less than the distance between the horizontal connecting member located at the uppermost position of the vertical extension member and the lowest level of the purlin located below the vertical extension member.
[0028] Optionally, the spacing unit includes a supporting corbel; the supporting corbel includes a crossbeam and an oblique beam; the crossbeam is horizontally arranged, one end of the crossbeam is fixed to the vertical extension piece, and the other end extends away from the vertical extension piece, and one end of the oblique beam is fixed to the vertical extension piece, and the other end is fixed to the crossbeam.
[0029] Optionally, in the vertical direction, the length of the vertical extension member is not less than the distance between the horizontal connecting member located at the uppermost part of the vertical extension member and the supporting corbel located below the vertical extension member.
[0030] The utility model also provides a cofferdam lowering system, which comprises a plurality of the above-mentioned cofferdam lowering devices; wherein the casings in the cofferdam lowering devices are distributed along the inner circumference of the cofferdam.
[0031] Optionally, at least two of the cofferdam lowering devices are symmetrically arranged relative to the center of the cofferdam, denoted as a first cofferdam lowering device and a second cofferdam lowering device; the first cofferdam lowering device has a first vertical extension member; the minimum horizontal distance between the first vertical extension member and the adjacent purlin on the inner side surface of the cofferdam is represented by a first predetermined distance d1; the second cofferdam lowering device has a second vertical extension member; the minimum horizontal distance between the second vertical extension member and the adjacent purlin on the inner side surface of the cofferdam is represented by a second predetermined distance d2; wherein, the sum of the first predetermined distance d1 and the second predetermined distance d2 is 18 to 22 centimeters.
[0032] Reference Figure 1 and Figure 2 This embodiment provides a cofferdam lowering device and a cofferdam lowering system. The cofferdam lowering device includes a supporting unit 100, a lowering unit 200, and a spacing unit 300.
[0033] The support unit 100 includes a casing 11. The bottom of the casing 11 is fixed in the riverbed, and the top extends out of the water surface for installing the lowering unit 200. The casing 11 is a steel casing with high strength and corrosion resistance.
[0034] The lowering unit 200 includes a support beam 21 and a jack 22. The support beam 21 is welded to the top of the casing 11. The jack 22 is welded to the top of the support beam 21 and close to one side of the cofferdam 400. The jack 22 is used to lower the cofferdam 400.
[0035] The support beam 21 can be made of three pieces of 700 steel, that is, three pieces of 700 steel are welded together to increase sufficient strength and rigidity to support the weight of the jack 22 and the cofferdam 400.
[0036] The bottom of the jack 22 can be provided with double 700 steel, which is welded to the top of the support beam 21. The jack 22 can be a continuous jack to provide a stable power output and ensure the stability of the cofferdam 400 during the descent process.
[0037] The spacing unit 300 includes a vertical extension 31 and a horizontal connector 32. The vertical extension 31 is mounted on the side wall of the casing 11 via the horizontal connector 32 and is located on the side of the casing 11 facing the cofferdam 400. During the lowering process, the spacing unit 300 maintains a certain distance between the cofferdam 400 and the casing 11 to prevent the cofferdam 400 from being affected by water flow and wind and waves, causing the final lowering position to exceed the error range. At the same time, it prevents the cofferdam 400 from getting stuck during the lowering process and being unable to be lowered to the correct position due to an increase in the verticality error. The verticality error refers to the degree to which the cofferdam 400 deviates from the vertical line. Excessive error may affect the stability of the cofferdam 400 and the accuracy of subsequent construction. Specifically, the horizontal length of the horizontal connector 32 should ensure that the minimum horizontal distance between the inner side of the cofferdam 400 and the vertical extension 31 is between 9 and 11 centimeters, preferably 10 centimeters.
[0038] The vertical extension member 31 can be made of double-joined I-shaped steel, and the design of the double-joined I-shaped steel improves the structural strength and stability of the vertical extension member 31. The double-joined I-shaped steel can be made of I28 channel steel.
[0039] The cofferdam lowering system includes multiple cofferdam lowering devices, wherein the casings in each cofferdam lowering device are distributed along the inner circumference of the cofferdam, preferably evenly distributed. A jack 22 is placed on each casing 11 to pull a portion of the cofferdam 400 to provide a uniform load across the cofferdam 400.
[0040] When the cofferdam 400 is rectangular, it has opposing inner side surfaces, a pair of which are designated as a first inner side surface and a second inner side surface. The direction from the first inner side surface toward the second inner side surface is designated as a first direction. The casing 11 adjacent to the first inner side surface is designated as a first casing, and the vertical extension 31 mounted on the first casing is designated as a first vertical extension. The casing 11 adjacent to the second inner side surface is designated as a second casing, and the vertical extension 31 mounted on the second casing is designated as a second vertical extension.
[0041] During the falling process, the minimum horizontal distance between the purlin on the first inner side of the cofferdam 400 and the first vertical extension is represented by the first predetermined distance d1, and the minimum horizontal distance between the purlin on the second inner side of the cofferdam 400 and the second vertical extension is represented by the second predetermined distance d2.
[0042] In the present application, in order to avoid the presence of a certain distance between the casing 11 and the cofferdam 400, which causes the water flow or wind force to continuously act on the cofferdam 400 and cause the cofferdam 400 to tilt, and at the same time avoid the spacing between the spacing unit 300 set on the casing 11 and the cofferdam 400 to be too small, causing the cofferdam 400 to interfere with the vertical extension member 31, and thus causing the cofferdam 400 to be stuck and unable to descend to the correct position, d1+d2 is controlled within 18 to 22 cm, preferably 20 cm.
[0043] For example, when d1 + d2 is 20 cm, if the first predetermined distance d1 is greater than 11 cm, then the second predetermined distance d2 is less than 9 cm. This results in the second inner side surface of the cofferdam 400 being too close to the second vertical extension member, increasing the risk of interference between the cofferdam 400 and the vertical extension member 31. Similarly, the first predetermined distance d1 cannot be less than 9 cm. Therefore, d1 and d2 should each be controlled within the range of 9 to 11 cm, preferably 10 cm.
[0044] When the cofferdam 400 is elliptical or circular, the first direction passes through the center of the ellipse or the center of the circle, and the distance between the two spacer units 300 and the cofferdam 400 opposite to each other along the first direction can be obtained similarly.
[0045] In some embodiments, there are no less than five horizontal connectors 32 to provide sufficient strength between the vertical extension 31 and the casing 11 and to ensure the verticality of the vertical extension 31. In a specific example, at least four of the horizontal connectors 32 are located above the normal water level.
[0046] In some embodiments, the spacing unit further includes a support corbel 34. The support corbel 34 is used to support the cofferdam 400 before it is lowered. The support corbel 34 comprises a horizontal beam and an inclined beam. The horizontal beam is horizontally arranged, with one end fixed to the vertical extension 31 and the other end extending away from the vertical extension 31. The inclined beam has one end fixed to the vertical extension 31 and the other end fixed to the horizontal beam. The support corbel 34 can be made of double-jointed I-shaped steel, which can be I28 channel steel.
[0047] In the vertical direction, the length of the vertical extension member 31 is determined by the relative positional relationship between the horizontal connector 32 and the lowest purlin or support corbel 34 in the cofferdam 400. For example, the height of the vertical extension member 31 can be determined by the distance between the horizontal connector 32 located at the top of the vertical extension member 31 and the lowest purlin or support corbel 34 located below the vertical extension member 31.
[0048] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.
Claims
1. A cofferdam lowering device, characterized in that: It includes a supporting unit, a lowering unit and a spacing unit; The supporting unit includes a casing, the bottom of which is fixed in the riverbed, and the top of which extends out of the water surface for installing the lowering unit; The lowering unit includes a support beam and a jack; the support beam is welded to the top of the casing, and the jack is welded to the top of the support beam and close to one side of the cofferdam; The spacing unit includes a vertical extension member and a plurality of horizontal connecting members, wherein the vertical extension member is mounted on the side wall of the casing through the plurality of horizontal connecting members and is located on a side of the casing facing the cofferdam; The length of the horizontal connecting member in the horizontal direction is such that the distance between the cofferdam purlin on the inner side of the cofferdam and the vertical extension member is 9 to 11 centimeters.
2. The cofferdam lowering device according to claim 1, characterized in that: There are no less than 5 horizontal connecting members.
3. The cofferdam lowering device according to claim 2, characterized in that: At least four of the horizontal connectors are located above the normal water level.
4. The cofferdam lowering device according to claim 1, characterized in that: In the vertical direction, the length of the vertical extension member is not less than the distance between the horizontal connecting member located at the uppermost position of the vertical extension member and the lowest level of the purlin located below the vertical extension member.
5. The cofferdam lowering device according to claim 1, characterized in that: The spacing unit includes a supporting corbel; the supporting corbel includes a crossbeam and an oblique beam; the crossbeam is arranged horizontally, one end of the crossbeam is fixed to the vertical extension piece, and the other end extends away from the vertical extension piece; one end of the oblique beam is fixed to the vertical extension piece, and the other end is fixed to the crossbeam.
6. The cofferdam lowering device according to claim 5, characterized in that: In the vertical direction, the length of the vertical extension member is not less than the distance between the horizontal connecting member located at the uppermost part of the vertical extension member and the supporting corbel located below the vertical extension member.
7. A cofferdam lowering system, characterized in that: It comprises a plurality of cofferdam lowering devices according to any one of claims 1 to 6; wherein the casings in each cofferdam lowering device are distributed along the inner circumference of the cofferdam.
8. The cofferdam lowering system according to claim 7, characterized in that: At least two of the cofferdam lowering devices are symmetrically arranged relative to the center of the cofferdam, denoted as a first cofferdam lowering device and a second cofferdam lowering device; the first cofferdam lowering device has a first vertical extension member; the minimum horizontal distance between the first vertical extension member and the adjacent purlin on the inner side surface of the cofferdam is represented by a first predetermined distance d1; the second cofferdam lowering device has a second vertical extension member; the minimum horizontal distance between the second vertical extension member and the adjacent purlin on the inner side surface of the cofferdam is represented by a second predetermined distance d2; wherein, the sum of the first predetermined distance d1 and the second predetermined distance d2 is 18 to 22 centimeters.