CN111395397A - Bending type immersed tube anti-deformation structure and construction method - Google Patents
Bending type immersed tube anti-deformation structure and construction method Download PDFInfo
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- 238000005452 bending Methods 0.000 title claims abstract description 14
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- 230000001154 acute effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000005188 flotation Methods 0.000 claims 5
- 238000007654 immersion Methods 0.000 abstract 2
- 238000009434 installation Methods 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
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- E02D29/00—Independent underground or underwater structures; Retaining walls
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
Description
技术领域technical field
本发明涉及沉管领域,尤其涉及一种折弯型沉管防变形结构及施工方法。The invention relates to the field of immersed tubes, in particular to a bending-type immersed tube deformation prevention structure and a construction method.
背景技术Background technique
浮箱吊沉法是比较新的一种管段沉放法。通常在管段上方放4只方形浮箱,用吊索直接将管段系吊,浮箱分成前后两组,每组两只浮箱用钢桁架联成整体,并用锚索将各组浮箱定位,在浮箱顶上安设起吊卷扬机和浮箱定位卷扬机。管段的定位须在其左右前后另用锚索牵拉,其定位卷扬机则设于定位塔的顶部。这一沉放法的主要特点是设备简单,适用于宽度20米以上的大、中型管段。Floating box hanging and settling method is a relatively new pipe section settling method. Usually, 4 square pontoons are placed above the pipe section, and the pipe section is directly hoisted with slings. The pontoon is divided into two groups, the front and the rear. The two pontoons in each group are connected by steel trusses, and each group of pontoons is positioned with anchor cables. A hoisting winch and a floating box positioning winch are installed on the top of the floating box. The positioning of the pipe section must be pulled by another anchor cable at the left and right, front and rear, and the positioning winch is set on the top of the positioning tower. The main feature of this sinking method is that the equipment is simple, and it is suitable for large and medium-sized pipe sections with a width of more than 20 meters.
中国专利文献公开号CN104676108A公开的一种跨海钢沉管的设计方法。该跨海钢沉管的设计方法包括以下步骤:(1)所述跨海钢沉管包括同一平面上的曲率半径相等的两上弯段及两下弯段,根据海床地形,确定管道线路布置;(2)计算设计曲率半径:根据管道材料强度及其受力特性,按照规范计算得出设计曲率半径,根据管道线路布置及设计曲率半径,确定上弯段、下弯段弧长;(3)基于管道线路布置及设计曲率半径,在海床挖出与管道线路相匹配的基槽;(4)施工拖行管道,并且确保管道沉放后的曲率半径等于设计曲率半径。Chinese Patent Document Publication No. CN104676108A discloses a design method for a cross-sea steel immersed tube. The design method of the sea-crossing steel immersed pipe includes the following steps: (1) the sea-crossing steel immersed pipe includes two upper-bend sections and two lower-bend sections with equal curvature radii on the same plane, and the pipeline route is determined according to the topography of the seabed Layout; (2) Calculate the design curvature radius: According to the strength of the pipeline material and its stress characteristics, the design curvature radius is calculated according to the specification, and the arc length of the upper and lower bending sections is determined according to the pipeline layout and the design curvature radius; ( 3) Based on the layout of the pipeline route and the design curvature radius, a foundation groove matching the pipeline route shall be dug in the seabed; (4) The pipeline shall be towed during construction, and the curvature radius after the pipeline is laid down shall be equal to the design curvature radius.
在沉管安装时,在水域与陆地相接的地方为了更好的连接,该处位置的沉管需要制作成弯折的一体管道,同时为了防锈在管道外壁会覆盖涂层,而该种弯折的沉管安装时容易发生形变使得涂层容易脱落,导致沉管质量受损。When the immersed pipe is installed, in order to better connect the water and the land, the immersed pipe at this position needs to be made into a bent one-piece pipe, and the outer wall of the pipe will be coated to prevent rust. The bent immersed tube is prone to deformation during installation, which makes the coating easy to fall off, resulting in damage to the quality of the immersed tube.
发明内容SUMMARY OF THE INVENTION
为了克服现有技术的缺陷,本发明所要解决的技术问题在于提出一种折弯型沉管防变形结构,安装时改变沉管本体的沉放角度,使得受力均匀不易产生变形,使得沉管安装质量得到保证。In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a bending-type immersed tube anti-deformation structure. During installation, the sinking angle of the immersed tube body is changed, so that the force is uniform and it is not easy to deform, so that the immersed tube is not easily deformed. Installation quality is guaranteed.
为达此目的,本发明采用以下技术方案:For this purpose, the present invention adopts the following technical solutions:
本发明提供的一种折弯型沉管防变形结构,包括沉管本体,所述沉管本体包括第一管段和第二管段,所述第一管段与所述第二管段之间夹角为锐角;所述第一管段与所述第二管段上均套设有调距机构,所述调距机构可沿所述第一管段与所述第二管段轴线方向移动;每个所述调距机构上均连接有配重浮箱,所述配重浮箱与所述第一管段与所述第二管段轴线之间夹角可调。A bending-type immersed tube deformation prevention structure provided by the present invention includes an immersed tube body, and the immersed tube body includes a first tube section and a second tube section, and the included angle between the first tube section and the second tube section is Acute angle; a distance adjustment mechanism is sleeved on the first pipe section and the second pipe section, and the distance adjustment mechanism can move along the axis direction of the first pipe section and the second pipe section; each of the distance adjustment mechanisms Each mechanism is connected with a counterweight floating box, and the included angle between the counterweight floating box and the axes of the first pipe section and the second pipe section is adjustable.
本发明优选地技术方案在于,所述调距机构包括两个并排的安装环,所述安装环内侧设置有若干个导向轮,所述沉管本体下侧设置有匹配的导向棱条槽,下侧的所述导向轮沿所述导向棱条槽长度方向移动,其余的所述导向轮与所述沉管本体侧壁相抵。The preferred technical solution of the present invention is that the distance adjustment mechanism includes two side-by-side mounting rings, a number of guide wheels are arranged inside the mounting rings, and a matching guide rib groove is arranged on the lower side of the immersed tube body. The guide wheels on the side move along the length direction of the guide rib grooves, and the remaining guide wheels abut against the side walls of the immersed tube body.
本发明优选地技术方案在于,所述调距机构还包括两个防水电机,两个所述安装环之间设置有固定平台,两个所述防水电机均固定于所述固定平台上;所述沉管本体两端以及转折处均设置有连接座,两个所述防水电机通过缆绳分别连接其两侧的两个所述连接座。A preferred technical solution of the present invention is that the distance adjustment mechanism further includes two waterproof motors, a fixed platform is arranged between the two installation rings, and the two waterproof motors are both fixed on the fixed platform; the Both ends of the immersed tube body and the turning point are provided with connecting seats, and the two waterproof motors are respectively connected to the two connecting seats on both sides of the immersed tube by cables.
本发明优选地技术方案在于,所述配重浮箱的一侧下方设置有两个连接杆,两个所述连接杆的另一端固定连接有转轴,所述安装环的外侧设置匹配的有安装支座,所述转轴与所述安装支座转动连接,所述配重浮箱的另一侧下方设置有伸缩装置。The preferred technical solution of the present invention is that two connecting rods are arranged under one side of the counterweight floating box, the other ends of the two connecting rods are fixedly connected with a rotating shaft, and the outer side of the mounting ring is provided with a matching mounting ring. A support, the rotating shaft is rotatably connected with the installation support, and a telescopic device is provided under the other side of the counterweight floating box.
本发明优选地技术方案在于,所述伸缩装置包括防水伸缩杆,所述防水伸缩杆的一端固定于所述配重浮箱的下侧,所述防水伸缩杆的另一端设置有连接轴,所述安装环的外侧设置有滑接支座,所述滑接支座上设置有长条槽,所述连接轴转动连接于所述长条槽中,且可沿所述长条槽的长度方向移动。The preferred technical solution of the present invention is that the telescopic device comprises a waterproof telescopic rod, one end of the waterproof telescopic rod is fixed on the lower side of the counterweight floating box, and the other end of the waterproof telescopic rod is provided with a connecting shaft, so The outer side of the mounting ring is provided with a sliding support, a long groove is arranged on the sliding support, and the connecting shaft is rotatably connected to the long groove, and can be along the length direction of the long groove move.
本发明优选地技术方案在于,两个所述安装环之间设置有若干个固定杆。A preferred technical solution of the present invention is that several fixing rods are arranged between the two mounting rings.
本发明优选地技术方案在于,两个所述防水电机的安装朝向相反,以从两侧连接所述连接座,以使得传动力平衡。The preferred technical solution of the present invention is that the installation directions of the two waterproof motors are opposite, so as to connect the connection bases from both sides, so as to balance the transmission force.
一种折弯型沉管防变形结构施工方法,包括步骤S00:在沉管本体的外侧焊接导向棱条槽和连接座,然后在整个沉管本体外侧设置防锈涂层;步骤S10:通过固定杆将两个安装环焊接在一起,同时焊接上固定平台,在安装环上焊接上安装支座、滑接支座,将两个防水电机固定在固定平台上,将焊接好的安装环分别套入第一管段与第二管段,然后用缆绳连接防水电机输出轴和连接座;步骤S20:将安装好安装环的沉管本体吊装至水面,在水中完成配重浮箱的连接;步骤S30:启动防水电机调节配重浮箱的位置,同时调节防水伸缩杆的长度,使得配重浮箱处于水平状态时,第一管段与第二管段轴线方向与水平线方向构成等腰三角形;步骤S40:改变配重浮箱的浮力,使得沉管缓慢下沉,同时采用船吊配合安放,在下降时可根据沉管本体受力情况调节防水电机和防水伸缩杆;步骤S50:在沉管安放阶段,通过将第一管段的防水伸缩电机伸长,第二管段的防水伸缩电机缩短,同时改变配重浮箱的浮力,使得沉管本体达到需要安装的角度,然后完成安放;步骤S60:将安装环切割拆除,通过船吊将其提起,固定沉管本体。A construction method for an anti-deformation structure of a bending type immersed tube, comprising step S00: welding a guide rib groove and a connecting seat on the outer side of the immersed tube body, and then providing an anti-rust coating on the outer side of the entire immersed tube body; step S10: by fixing The rod welds the two mounting rings together, and at the same time welds the fixed platform, welds the mounting support and the sliding support on the mounting ring, fixes the two waterproof motors on the fixed platform, and sets the welded mounting rings separately. Enter the first pipe section and the second pipe section, and then connect the waterproof motor output shaft and the connection seat with a cable; Step S20: hoist the immersed tube body with the installation ring installed to the water surface, and complete the connection of the counterweight floating box in the water; Step S30: Start the waterproof motor to adjust the position of the counterweight floating box, and at the same time adjust the length of the waterproof telescopic rod, so that when the counterweight floating box is in a horizontal state, the axis direction of the first pipe section and the second pipe section and the direction of the horizontal line form an isosceles triangle; Step S40: change The buoyancy of the counterweight buoyancy box makes the immersed tube sink slowly, and at the same time, the ship crane is used for coordinating placement. When descending, the waterproof motor and waterproof telescopic rod can be adjusted according to the force of the immersed tube body; Step S50: In the stage of placing the immersed tube, pass Extend the waterproof telescopic motor of the first pipe section, shorten the waterproof telescopic motor of the second pipe section, and at the same time change the buoyancy of the counterweight floating box, so that the immersed tube body reaches the angle that needs to be installed, and then complete the installation; Step S60: Cut the installation ring Remove it, lift it up by a ship crane, and fix the immersed tube body.
本发明的有益效果为:The beneficial effects of the present invention are:
本发明提供的一种折弯型沉管防变形结构,包括沉管本体,所述沉管本体包括第一管段和第二管段,所述第一管段与所述第二管段之间夹角为锐角;所述第一管段与所述第二管段上均套设有调距机构,所述调距机构可沿所述第一管段与所述第二管段轴线方向移动;每个所述调距机构上均连接有配重浮箱,所述配重浮箱与所述第一管段与所述第二管段轴线之间夹角可调。配重浮箱浮力垂直于其平面,改变其在沉管本体的位置以及与沉管本体之间的夹角,可以改变沉管沉放时的角度,从而使得沉放时受力均匀不易弯折变形。A bending-type immersed tube deformation prevention structure provided by the present invention includes an immersed tube body, and the immersed tube body includes a first tube section and a second tube section, and the included angle between the first tube section and the second tube section is Acute angle; a distance adjustment mechanism is sleeved on the first pipe section and the second pipe section, and the distance adjustment mechanism can move along the axis direction of the first pipe section and the second pipe section; each of the distance adjustment mechanisms Each mechanism is connected with a counterweight floating box, and the included angle between the counterweight floating box and the axes of the first pipe section and the second pipe section is adjustable. The buoyancy of the counterweight pontoon is perpendicular to its plane, changing its position on the immersed tube body and the angle between it and the immersed tube body can change the angle of the immersed tube when it sinks, so that the force is uniform and not easy to bend during sinking. deformed.
附图说明Description of drawings
图1是本发明具体实施方式中提供的折弯型沉管防变形结构整体结构示意图;1 is a schematic diagram of the overall structure of the bending-type immersed tube anti-deformation structure provided in the specific embodiment of the present invention;
图2是本发明具体实施方式中提供的图1中A部分放大的示意图;2 is an enlarged schematic diagram of part A in FIG. 1 provided in the specific embodiment of the present invention;
图3是本发明具体实施方式中提供的折弯型沉管防变形结构端面结构的示意图;3 is a schematic diagram of the end surface structure of the bending-type immersed tube deformation-resistant structure provided in the specific embodiment of the present invention;
图中:In the picture:
1、沉管本体;11、第一管段;12、第二管段;13、导向棱条槽;14、连接座;21、固定杆;22、固定平台;23、安装支座;24、导向轮;3、配重浮箱;31、连接杆;32、转轴;4、调距机构;41、防水电机;42、安装环;5、伸缩装置;51、防水伸缩杆;52、滑接支座;511、连接轴;521、长条槽。1. Immersed tube body; 11. First pipe section; 12. Second pipe section; 13. Guide rib groove; 14. Connecting seat; 21. Fixing rod; 22. Fixing platform; 23. Mounting support; 24. Guide wheel ;3, counterweight floating box; 31, connecting rod; 32, rotating shaft; 4, distance adjustment mechanism; 41, waterproof motor; 42, mounting ring; 5, telescopic device; 51, waterproof telescopic rod; 52, sliding support ; 511, connecting shaft; 521, long slot.
具体实施方式Detailed ways
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.
如图1所示,本实施例中提供的一种折弯型沉管防变形结构,包括沉管本体1,所述沉管本体1包括第一管段11和第二管段12,所述第一管段11与所述第二管段12之间夹角为锐角;所述第一管段11与所述第二管段12上均套设有调距机构4,所述调距机构4可沿所述第一管段11与所述第二管段12轴线方向移动;每个所述调距机构4上均连接有配重浮箱3,所述配重浮箱3与所述第一管段11与所述第二管段12轴线之间夹角可调。由于配重浮箱3的浮力垂直于其平面,在沉放时,通过改变调距机构4在第一管段11和第二管段12的不同位置,同时调节两个配重浮箱3的浮力大小,使得可以改变第一管段11和第二管段12连接有安装环42位置的高低位置,从而改变沉管本体1沉放时的空间位置,使得在沉放时沉管本体1受力均匀,不易产生形变导致防锈涂层损坏。同时通过防水伸缩杆51调节配重浮箱3与沉管本体1之间的夹角,使得改变作用力方向,可以进一步辅助矫正沉管本体1的姿态。As shown in FIG. 1 , a bending-type immersed pipe anti-deformation structure provided in this embodiment includes an immersed pipe body 1 , and the immersed pipe body 1 includes a
优选的,所述调距机构4包括两个并排的安装环42,两个所述安装环42之间设置有若干个固定杆21。所述安装环42内侧设置有若干个导向轮24,所述沉管本体1下侧设置有匹配的导向棱条槽13,下侧的所述导向轮24沿所述导向棱条槽13长度方向移动,其余的所述导向轮24与所述沉管本体1侧壁相抵。在沉放时,沉管本体1下侧受力较大,通过设置导向棱条槽13可以将作用力都集中在导向棱条槽13中,从而使得沉管本体1其他地方不易变形,同时导向棱条槽13还可以很好的限制安装环42,使得其只能沿导向棱条槽13长度方向移动,不会产生转动。同时导向棱条槽13在沉管本体1安装之后也可以与地基更好的作用,提高安装强度。Preferably, the distance adjusting mechanism 4 includes two side-by-side mounting rings 42 , and several fixing rods 21 are arranged between the two mounting rings 42 .
优选的,所述调距机构4还包括两个防水电机41,两个所述防水电机41的安装朝向相反,以从两侧连接所述连接座14,以使得传动力平衡。两个所述安装环42之间设置有固定平台22,两个所述防水电机41均固定于所述固定平台22上;所述沉管本体1两端以及转折处均设置有连接座14,两个所述防水电机41通过缆绳分别连接其两侧的两个所述连接座14。第一管段11靠近管端面的防水电机41从固定平台22的一侧连接管端面处的连接座14,第一管段11靠近转折位置的防水电机41从固定平台22的另一侧连接转折处的连接座14。同理第二管段12的连接方式相同。在需要调节安装环42往折弯处移动时,靠近折弯处的防水电机41转动缩短缆绳,另一个防水电机41将缆绳放长,在作用时,两个防水电机41的作用力不在同一直线,从而会产生一点的扭转力,该扭转力可以与电机作用与安装环42一侧所产生的扭转力相互作用,从而使得安装环42受力更加均衡。Preferably, the distance adjusting mechanism 4 further includes two
优选的,所述配重浮箱3的一侧下方设置有两个连接杆31,两个所述连接杆31的另一端固定连接有转轴32,所述安装环42的外侧设置匹配的有安装支座23,所述转轴32与所述安装支座23转动连接,所述配重浮箱3的另一侧下方设置有伸缩装置5。进一步地,所述伸缩装置5包括防水伸缩杆51,所述防水伸缩杆51的一端固定于所述配重浮箱3的下侧,所述防水伸缩杆51的另一端设置有连接轴511,所述安装环42的外侧设置有滑接支座52,所述滑接支座52上设置有长条槽521,所述连接轴511转动连接于所述长条槽521中,且可沿所述长条槽521的长度方向移动。在调节配重浮箱3与第一管段11或第二管段12的夹角时,改变防水伸缩杆51的长度,防水伸缩杆51的连接轴511将沿长条槽521的长度方向滑动,同时配重浮箱3另一端的转轴32会相应的旋转,配重浮箱3的浮力垂直于其平面,改变配重浮箱3与沉管本体1的夹角可以提供不同方向的作用力,从而可以方便改变沉管本体1的姿态,使得沉放时受力均匀,不易弯折损坏。Preferably, two connecting
一种折弯型沉管防变形结构施工方法,包括步骤S00:在沉管本体1的外侧焊接导向棱条槽13和连接座14,然后在整个沉管本体1外侧设置防锈涂层;步骤S10:通过固定杆21将两个安装环42焊接在一起,同时焊接上固定平台22,在安装环42上焊接上安装支座23、滑接支座52,将两个防水电机41固定在固定平台22上,将焊接好的安装环42分别套入第一管段11与第二管段12,然后用缆绳连接防水电机41输出轴和连接座14;步骤S20:将安装好安装环42的沉管本体1吊装至水面,在水中完成配重浮箱3的连接;步骤S30:启动防水电机41调节配重浮箱3的位置,同时调节防水伸缩杆51的长度,使得配重浮箱3处于水平状态时,第一管段11与第二管段12轴线方向与水平线方向构成等腰三角形;步骤S40:改变配重浮箱3的浮力,使得沉管缓慢下沉,同时采用船吊配合安放,在下降时可根据沉管本体1受力情况调节防水电机41和防水伸缩杆51;步骤S50:在沉管安放阶段,通过将第一管段11的防水伸缩电机伸长,第二管段12的防水伸缩电机缩短,同时改变配重浮箱3的浮力,使得沉管本体1达到需要安装的角度,然后完成安放;步骤S60:将安装环42切割拆除,通过船吊将其提起,固定沉管本体1。A construction method for an anti-deformation structure of a bending type immersed tube, comprising step S00: welding a guide rib groove 13 and a connecting seat 14 on the outer side of the immersed tube body 1, and then providing an anti-rust coating on the outer side of the entire immersed tube body 1; step S10: Weld the two mounting rings 42 together through the fixing rod 21, weld the fixing platform 22 at the same time, weld the mounting support 23 and the sliding support 52 on the mounting ring 42, and fix the two waterproof motors 41 on the fixed On the platform 22, the welded mounting rings 42 are respectively sleeved into the first pipe section 11 and the second pipe section 12, and then the output shaft of the waterproof motor 41 and the connecting seat 14 are connected by cables; Step S20: the immersed tube with the mounting ring 42 installed The main body 1 is hoisted to the water surface, and the connection of the counterweight floating box 3 is completed in the water; Step S30: start the waterproof motor 41 to adjust the position of the counterweight floating box 3, and adjust the length of the waterproof telescopic rod 51 at the same time, so that the counterweight floating box 3 is horizontal In the state, the first pipe section 11 and the second pipe section 12 form an isosceles triangle in the axial direction and the horizontal line direction; Step S40: change the buoyancy of the counterweight buoyancy tank 3, so that the immersed tube sinks slowly, and at the same time, the ship crane is used to cooperate with it. At the same time, the
本发明是通过优选实施例进行描述的,本领域技术人员知悉,在不脱离本发明的精神和范围的情况下,可以对这些特征和实施例进行各种改变或等效替换。本发明不受此处所公开的具体实施例的限制,其他落入本申请的权利要求内的实施例都属于本发明保护的范围。The present invention has been described in terms of preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited by the specific embodiments disclosed herein, and other embodiments falling within the claims of the present application all belong to the protection scope of the present invention.
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