WO2020168711A1 - 一种渡槽渗漏修复方法 - Google Patents

一种渡槽渗漏修复方法 Download PDF

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Publication number
WO2020168711A1
WO2020168711A1 PCT/CN2019/107483 CN2019107483W WO2020168711A1 WO 2020168711 A1 WO2020168711 A1 WO 2020168711A1 CN 2019107483 W CN2019107483 W CN 2019107483W WO 2020168711 A1 WO2020168711 A1 WO 2020168711A1
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Prior art keywords
template
aqueduct
formwork
rectangular
ribs
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PCT/CN2019/107483
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English (en)
French (fr)
Inventor
李兆恒
谢亮
黄锦林
王立华
张君禄
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广东省水利水电科学研究院
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Application filed by 广东省水利水电科学研究院 filed Critical 广东省水利水电科学研究院
Priority to US16/973,803 priority Critical patent/US11920313B2/en
Publication of WO2020168711A1 publication Critical patent/WO2020168711A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B5/00—Artificial water canals, e.g. irrigation canals
    • E02B5/02—Making or lining canals
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/16—Sealings or joints

Definitions

  • the invention relates to a method for repairing aqueduct leakage, belonging to the field of water conservancy projects, in particular to the field of repairing aqueducts in water conservancy projects.
  • An aqueduct is an overhead water conveyance structure that transports channel water across rivers, roads, mountains, valleys, etc. It is one of the most widely used three-dimensional crossing structures in hydraulic structures. In addition to conveying canal water, it can also be used for flood discharge, sand discharge, navigation and diversion. With the construction of the South-to-North Water Diversion Project and the domestic water conservancy infrastructure, aqueducts have been widely adopted, and large-scale aqueducts often adopt new prestressing technology, and relevant research results have appeared one after another. In the long-distance water transfer project, the aqueduct is an important hydraulic structure. Once it fails, the direct and indirect economic losses are immeasurable.
  • the causes of aqueduct damage mainly include earthquake, wind, water damage, durability problems (including concrete carbonization, water stop aging, freezing and thawing, corrosion, water erosion, soil frost heave, uneven settlement, etc.), overload damage and unreasonable design or
  • the construction quality is poor, among which earthquake, wind, and water damage are sudden.
  • Leakage of the aqueduct body and unstable structure of the trough body are common forms of trough failure.
  • the penetration of the trough body will cause corrosion of the steel bars. When the corrosion of the steel bar reaches a certain level, the volume of the steel bar itself expands. Under the action of the expansion force, the concrete outside the tank wall cracks until it collapses, which damages the structure of the aqueduct wall and affects the normal use of the aqueduct.
  • the commonly used reinforcement methods mainly use special concrete, mesh cloth and fiber materials for reinforcement.
  • the existing methods have many limitations, such as poor seepage prevention effects, complex construction steps, high construction costs, and due to factors such as materials and construction, the later reinforcement materials have poor adhesion to the original structure, and fiber materials The cost is higher.
  • the purpose of the present invention is to overcome the above shortcomings and provide a method for repairing aqueduct leakage.
  • a thin-walled template is used to pour a reinforcement layer inside the aqueduct body.
  • the template is a disassembly-free template.
  • the present invention has simple construction steps for repairing aqueduct leakage. High construction efficiency.
  • the invention is realized by the following technical scheme: a method for repairing leakage of an aqueduct, in which a template is arranged in the inner layer of the aqueduct.
  • the formwork is poured on the inner side of the aqueduct to form a reinforcement layer.
  • the formwork includes a side formwork, a bottom formwork and a side formwork.
  • the side formwork is set on the inner side of the vertical wall of the aqueduct body, and the bottom formwork is set on the bottom of the trough body.
  • the corner templates are connected, and multiple ribs are arranged on the axillary corner templates.
  • S2 Lay the formwork on the inner side of the aqueduct, and fix the bottom formwork, the side formwork and the side formwork with each other.
  • the outer side of the formwork is fixed with fixed rods, and the supporting rods are connected to the fixed rods for auxiliary fixing.
  • a gap is set between the inner wall of the aqueduct and the formwork;
  • the template is a non-demolition template, and it becomes a part of the aqueduct after the pouring is completed.
  • the method for repairing aqueduct leakage further includes after step S5: continuing to cut the expansion joint at the original aqueduct expansion joint position, and then filling the expansion joint with a fixed rubber piece.
  • a plurality of horizontal and vertical stiffening ribs are provided on the sides of the side formwork and the bottom formwork.
  • the stiffening ribs are rectangular ribs with a rectangular cross section.
  • a fixing rod is provided on the outside of the side formwork and the bottom formwork for auxiliary fixing.
  • the fixing rods are A rod-shaped structure, a plurality of chucks are arranged above the rod body, and each chuck includes an upper chuck and a lower chuck.
  • the upper and lower chucks are correspondingly arranged to form a card slot.
  • the shape of the card slot is a rectangular cross-section, which is in line with the surface of the template.
  • the rectangular ribs correspond to each other, and the rectangular ribs are embedded in the slot for engagement.
  • the side of the upper and lower chuck is provided with a lug, and the middle of the lug is correspondingly provided with a bolt hole.
  • the side template and the bottom template are both rectangular structures with the same structure, including upper and lower bottom surfaces and four side surfaces.
  • the four sides are provided with protruding strips and grooves, and the protruding strips and the grooves are engaged with each other during the interlocking process of the templates , Make the template structure tight.
  • a support rod is arranged on the outside of the fixed rod, and the support rod supports the fixed rod to strengthen the fixing of the template.
  • the formwork is a thin-walled structure composed of fiber concrete. After the components are cast and formed, the formwork and the aqueduct are integrated without the need for mold removal.
  • step S2 in the process of assembling the templates, the convex strips and grooves on the sides of the template are engaged with each other, and the fixed rod is clamped to the rectangular rib through the clamp head to realize the installation and fixation of the template.
  • Axillary ribs are arranged above the axillary corner template to form a high-strength axillary corner template.
  • the present invention improves a method for repairing leakage of aqueduct.
  • the connection support of the high-strength axillary corner template Through the connection support of the high-strength axillary corner template, the connection and fixation of the fixed rod and the support rod, and the strengthened engagement of the convex strip and the groove on the side of the template, the overall performance of the template is improved.
  • the supporting auxiliary group structure is reduced;
  • the formwork is a thin-walled non-dismantling formwork.
  • the thin-walled dismantling-free formwork is used to form an inner lining layer on the inner wall of the aqueduct, and then concrete is poured into the gap.
  • the concrete and the thin-walled formwork together form a reinforcement layer. Effectively reinforce the penetration damage of the aqueduct, avoiding the removal of the formwork after construction, and the construction process is simple.
  • Figure 1 is a schematic diagram of the present invention.
  • Figure 2 is a schematic view of part A-A in Figure 1 of the present invention.
  • Figure 3 is a schematic diagram of the structure of the axillary corner plate in the present invention.
  • Figure 4 is a front view of the side template of the present invention.
  • Figure 5 is a schematic diagram of the convex strips and grooves of the side template of the present invention.
  • Fig. 6 is a schematic diagram of the structure of the fixed rod in the present invention.
  • a method for repairing leakage of an aqueduct in which a template is provided on the inner layer of the aqueduct body 1.
  • the template includes a side template 2, a bottom template 3, and a side template 11.
  • the side template 2 is set on the inner side of the vertical wall of the aqueduct body 1
  • the bottom template 3 is set on the bottom of the tank body.
  • the bottom template 3 and the side template 2 pass through the side template 11 is connected, a plurality of stiffening plates are arranged on the armpit corner template 11, which improves the supporting strength of the armpit corner template 11.
  • the sides of the side formwork 2 and the bottom formwork 3 are provided with a plurality of horizontal and vertical stiffening ribs, the stiffening ribs are rectangular ribs 5 with a rectangular cross section, and fixing rods 4 are provided outside the side formwork 2 and the bottom formwork 3 for auxiliary fixing ,
  • the fixed rod 4 is a rod-shaped structure, and a plurality of chucks are arranged above the rod body, each of the chucks includes an upper chuck 8 and a lower chuck 9, the upper and lower chucks 9 are correspondingly arranged to form a card slot, a card slot
  • the shape of is a rectangular cross-section, which corresponds to the rectangular rib 5 on the surface of the template, and the rectangular rib 5 is embedded in the card slot for engagement.
  • the upper and lower chucks 9 are provided with lugs on the side, and the middle of the lugs are correspondingly provided with bolt holes. After the lugs are engaged with the rectangular rib 5, the bolts pass through the bolt holes to strengthen the engagement of the fixing rod 4 to the rectangular rib 5.
  • the side template 2 and the bottom template 3 are rectangular structures with the same structure, including upper and lower bottom surfaces and four side surfaces.
  • the four sides are provided with protruding strips 6 and grooves 7, and the protruding strips 6 and The grooves 7 are locked together to make the template structure compact.
  • a support rod 12 is provided outside the fixed rod 4, and the support rod 12 is fixed with the fixed rod 4 to strengthen the support of the template.
  • the formwork is made of fiber concrete, and after the components are poured into shape, the formwork and the aqueduct are integrated without the need to dismantle the formwork.
  • the template is a non-dismantling template, which becomes a part of the aqueduct after the pouring is completed.
  • the method for repairing leakage of aqueduct further includes a step after step S5: S6 continues to cut the expansion joint at the original aqueduct expansion joint position, and then fills the expansion joint with a fixed rubber member.
  • step S2 in the process of assembling the templates, the convex strips 6 and the grooves 7 on the side of the template are engaged with each other, and the fixed rod 4 is clamped with the rectangular rib 5 through the clamping head to realize the fixation with the template.
  • the support rod 12 supports the template.
  • Axillary ribs 10 are arranged above the axillary corner template to form a high-strength axillary corner template.
  • the disassembly-free template is a thin-walled structure composed of fiber concrete.
  • the present invention improves an aqueduct leakage repair method.
  • the connection support of the high-strength axillary angle template 11, the connection and fixation of the fixed rod 4 and the support rod 12, and the reinforced engagement of the convex strip 6 and the groove 7 on the side of the template the The overall performance of the formwork reduces the supporting structure; the thin-walled non-dismantling formwork is used to form an inner lining layer on the inner wall of the aqueduct, and then concrete is poured into the gap.
  • the concrete and the thin-walled formwork together form a reinforcement layer, which effectively damages the aqueduct.
  • the formwork is free from dismantling after construction, and the construction process is simple.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Ocean & Marine Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

本发明涉及一种渡槽渗漏修复方法，在渡槽槽体内层设置有模板。利用模板在渡槽内侧浇筑形成加固层，模板包括侧模板、底模板和腋角模板，所述侧模板设置在渡槽槽体竖壁内侧，底模板设置在槽体底层，底模板和侧模板通过腋角模板连接，腋角模板上设置有多个肋条。所述模板为薄壁免拆模板，利用薄壁免拆模板在渡槽内壁形成内衬层，再向其间隙内浇筑混凝土，混凝土与薄壁免拆模板共同形成加固层，有效的对渡槽的渗透损伤进行加固，模板施工后免于拆除，施工过程简单。

Description

一种渡槽渗漏修复方法 技术领域
本发明涉及一种渡槽渗漏修复方法，属于水利工程领域，尤其是水利工程中渡槽的修复领域。
背景技术
渡槽是输送渠道水流跨越河渠、道路、山冲、谷口等的架空输水建筑物,是水工建筑物中应用最广的立体交叉建筑物之一。除用于输送渠水外,还可供排洪、排沙、通航和导流等之用。随着南水北调工程与国内水利基础建设的兴建，渡槽被广泛采用，大型渡槽常采用预应力新技术，相关研究成果相继出现。长距离调水工程中，渡槽是一种重要的水工建筑物，一旦失效，直接和间接经济损失不可估量。
渡槽破坏原因主要包括地震、风致、水毁、耐久性问题(包括混凝土碳化、止水老化、冻融、腐蚀、水流冲刷、土体冻胀、不均匀沉降等)、超载破坏及设计不合理或施工质量差等，其中地震、风致、水毁破坏具有突发性。渡槽槽体发生渗漏，槽体结构不稳定是常见的槽体破坏表现形式，槽体的渗透会导致钢筋产生锈蚀。当钢筋锈蚀达到一定程度，钢筋自身体积膨胀，在胀力作用下，槽壁外混凝土发生开裂，直至崩落，使得渡槽槽壁结构被破坏，影响渡槽正常使用。
为防止槽体渗漏，其常用的加固方法主要有采用采用特殊混凝土,网格布以及纤维材料进行加固。但是，现有方法存在多种局限性，防渗效果不好，施工步骤复杂、施工成本较高，且由于材料、施工等因素影响，后期加固材料与原有结构粘合度差，且纤维材料的成本较高。
发明内容
本发明的目的在于克服上述不足之处，从而提供一种渡槽渗漏修复方法，利用薄壁模板在渡槽槽体内部浇筑加固层，模板为免拆卸模板，本发明修复渡槽渗漏施工步骤简单，施工效率高。
本发明用如下技术方案实现：一种渡槽渗漏修复方法，在渡槽槽体内层设置有模板。利用模板在渡槽内侧浇筑形成加固层，模板包括侧模板、底模板和腋角模板，所述侧模板 设置在渡槽槽体竖壁内侧，底模板设置在槽体底层，底模板和侧模板通过腋角模板连接，腋角模板上设置有多个肋条。
渡槽渗漏修复方法的具体施工步骤为：
S1：对渡槽槽体的尺寸进行测量，选择模板的尺寸和数量；
S2：在渡槽内侧铺设模板，将底模板、腋角模板以及侧模板相互卡合固定，模板外侧设置固定杆进行固定，支撑杆连接固定杆辅助固定，在渡槽内壁与模板之间设置间隙；
S3：向间隙中浇筑混凝土，形成加固层；
S4：对加固层混凝土进行养护；
S5：养护结束后拆除支撑杆和固定杆，模板为免拆模板，浇注完成后成为渡槽的一部分。
所述渡槽渗漏修复方法中还包括在步骤S5后：在原渡槽伸缩缝位置继续切割伸缩缝，然后再向伸缩缝中填充固定橡胶件。
所述侧模板和底模板侧面均设置有多条横竖垂直的加劲肋条，加劲肋条是截面为矩形的矩形肋条，所述侧模板和底模板外侧设置有固定杆进行辅助固定，所述固定杆为杆状结构，杆体上方设置有多个卡头，所述每个卡头包括上卡头和下卡头，上下卡头对应设置，形成卡槽，卡槽的形状为矩形截面，与模板表面的矩形肋条对应，矩形肋条嵌入卡槽中进行卡合。同时上下卡头侧面设置有卡耳，卡耳中部对应设置有螺栓孔，卡头与矩形肋条卡合后通过螺栓横穿螺栓孔，加强固定杆对肋条的卡合固定。
所述侧模板和底模板都为结构相同的矩形结构，包括上下底面以及四个侧面，四个侧面上设置有凸条和凹槽，在模板相互卡合过程中凸条与凹槽相卡合，使模板结构紧密。
所述固定杆外侧设置有支撑杆，支撑杆对固定杆进行支撑，加强模板的固定。
所述模板为纤维混凝土构成的薄壁结构，构件浇筑成型后，模板与渡槽形成一体，无需拆模。
所述步骤S2中，在模板相互拼合过程中，模板侧面的凸条和凹槽相互卡合，固定杆通过卡头卡接矩形肋条，实现模板的安装固定，通过固定杆与支撑杆实现对模板的支撑。所述腋角模板上方设置有腋角肋条，形成高强度腋角模板。
本发明提高一种渡槽渗漏修复方法，通过高强度腋角模板的连接支撑、固定杆与支撑杆的连接固定以及模板侧面的凸条与凹槽的加强卡合，提高了模板的整体性能，从而减少 了支撑辅组结构；所述模板为薄壁免拆模板，利用薄壁免拆模板在渡槽内壁形成内衬层，再向其间隙内浇筑混凝土，混凝土与薄壁模板共同形成加固层，有效的对渡槽的渗透损伤进行加固，模板施工后免于拆除，施工过程简单。
附图说明
图1为本发明示意图。
图2为本发明附图1中A-A部分示意视图。
图3为本发明中腋角板结构示意图。
图4为本发明中侧模板正面图。
图5为本发明中侧模板凸条和凹槽示意图。
图6为本发明中固定杆结构示意图。
附图标记说明：1-渡槽槽体、2-侧模板、3-底模板、4-固定杆、5-矩形肋条、6-凸条、7-凹槽、8-上卡头、9-下卡头、10-腋角肋条、11-腋角模板、12-支撑杆
具体实施方式
通过下面对实施例的描述，将更加有助于公众理解本发明，但不能也不应当将申请人所给出的具体的实施例视为对本发明技术方案的限制，任何对部件或技术特征的定义进行改变和/或对整体结构作形式的而非实质的变换都应视为本发明的技术方案所限定的保护范围。
如图1～2所示，本发明用如下技术方案实现：一种渡槽渗漏修复方法，在渡槽槽体1内层设置有模板。模板包括侧模板2、底模板3和腋角模板11，所述侧模板2设置在渡槽槽体1竖壁内侧，底模板3设置在槽体底层，底模板3和侧模板2通过腋角模板11连接，腋角模板11上设置有多个加劲板，提高了腋角模板11的支撑强度。
所述侧模板2和底模板3侧面均设置有多条横竖垂直的加劲肋条，加劲肋条是截面为矩形的矩形肋条5，所述侧模板2和底模板3外侧设置有固定杆4进行辅助固定，所述固定杆4为杆状结构，杆体上方设置有多个卡头，所述每个卡头包括上卡头8和下卡头9，上下卡头9对应设置，形成卡槽，卡槽的形状为矩形截面，与模板表面的矩形肋条5对应，矩形肋条5嵌入卡槽中进行卡合。同时上下卡头9侧面设置有卡耳，卡耳中部对应设置有 螺栓孔，卡耳与矩形肋条5卡合后通过螺栓横穿螺栓孔，加强固定杆4对矩形肋条5的卡合。
所述侧模板2和底模板3都为结构相同的矩形结构，包括上下底面以及四个侧面，四个侧面上设置有凸条6和凹槽7，在模板相互卡合过程中凸条6与凹槽7相卡合，使模板结构紧密。
所述固定杆4外侧设置有支撑杆12，支撑杆12与固定杆4进行固定，加强模板的支撑。
所述模板为纤维混凝土构成，构件浇筑成型后，模板与渡槽形成一体，无需拆模。
渡槽渗漏修复方法的具体施工步骤为：
S1：对渡槽槽体1的尺寸进行测量，选择模板的尺寸和数量；
S2：在渡槽内侧铺设模板，将底模板3、腋角模板11以及侧模板2相互卡合固定，通过固定杆4进行固定，支撑杆12连接固定杆4辅助固定，在渡槽内壁与模板之间设置间隙；
S3：向间隙中浇筑混凝土，形成加固层；
S4：对加固层混凝土进行养护；
S5：养护结束后拆除支撑杆12和固定杆4，模板为免拆模板，浇注完成后成为渡槽的一部分。
所述渡槽渗漏修复方法中步骤S5后还包括步骤：S6在原渡槽伸缩缝位置继续切割伸缩缝，然后再伸缩缝中填充固定橡胶件。
所述步骤S2中，在模板相互拼合过程中，模板侧面的凸条6和凹槽7相互卡合，固定杆4通过卡头卡接矩形肋条5，实现与模板的固定，通过固定杆4与支撑杆12实现对模板的支撑。所述腋角模板上方设置有腋角肋条10，形成高强度腋角模板。
所述免拆模板为由纤维混凝土组成的薄壁结构。
本发明提高一种渡槽渗漏修复方法，通过高强度腋角模板11的连接支撑、固定杆4与支撑杆12的连接固定以及模板侧面的凸条6与凹槽7的加强卡合，提高了模板的整体性能，从而减少了支撑结构；利用薄壁免拆模板在渡槽内壁形成内衬层，再向其间隙内浇筑混凝土，混凝土与薄壁模板共同形成加固层，有效的对渡槽的渗透损伤进行加固，模板施工后免于拆除，施工过程简单。

Claims (5)

  1. 一种渡槽渗漏修复方法，在渡槽槽体内层设置有模板；利用模板在渡槽内侧浇筑形成加固层，模板包括侧模板、底模板和腋角模板，所述侧模板设置在渡槽槽体竖壁内侧，底模板设置在槽体底层，底模板和侧模板通过腋角模板连接，腋角模板上设置有多个肋条；其特征在于渡槽渗漏修复方法的施工步骤为：
    S1：对渡槽槽体的尺寸进行测量，选择模板的尺寸和数量；
    S2：在渡槽内侧铺设模板，将底模板、腋角模板以及侧模板相互卡合固定，模板外侧设置固定杆进行固定，支撑杆连接固定杆辅助固定，在渡槽内壁与模板之间设置间隙；
    S3：向所述间隙中浇筑混凝土，形成加固层；
    S4：对加固层混凝土进行养护；
    S5：养护结束后拆除支撑杆和固定杆，模板为免拆模板，浇注完成后成为渡槽的一部分；
    所述侧模板和底模板侧面均设置有多条横竖垂直的加劲肋条，加劲肋条是截面为矩形的矩形肋条，所述侧模板和底模板外侧设置有固定杆进行辅助固定，所述固定杆为杆状结构，固定杆杆体上方设置有多个卡头，所述每个卡头包括上卡头和下卡头，上下卡头对应设置，形成卡槽，卡槽的形状为矩形截面与所述矩形肋条相匹配，所述矩形肋条嵌入卡槽中进行卡合。
  2. 如权利要求1所述的渡槽渗漏修复方法，其特征是：所述侧模板和底模板都为结构相同的矩形结构，包括上下底面以及四个侧面，四个侧面上设置有凸条和凹槽，在模板相互卡合过程中凸条与凹槽相卡合。
  3. 如权利要求1-2之一所述的渡槽渗漏修复方法，其特征是：所述模板为纤维混凝土构成的薄壁结构，构件浇筑成型后，模板与渡槽形成一体。
  4. 如权利要求1-2之一所述的渡槽渗漏修复方法，其特征是：所述渡槽渗漏修复方法中还包括在步骤S5后，在原渡槽伸缩缝位置继续切割伸缩缝，然后再伸缩缝中填充固定橡胶件。
  5. 如权利要求2所述的渡槽渗漏修复方法，其特征在于：上下卡头侧面设置有卡耳，卡耳中部对应设置有螺栓孔，卡头与矩形肋条卡合后通过螺栓横穿螺栓孔，加强固定杆的固定。
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