WO2022052438A1 - 一种用于预应力管道压浆的端头封堵装置 - Google Patents

一种用于预应力管道压浆的端头封堵装置 Download PDF

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Publication number
WO2022052438A1
WO2022052438A1 PCT/CN2021/081546 CN2021081546W WO2022052438A1 WO 2022052438 A1 WO2022052438 A1 WO 2022052438A1 CN 2021081546 W CN2021081546 W CN 2021081546W WO 2022052438 A1 WO2022052438 A1 WO 2022052438A1
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Prior art keywords
anchor
grouting
sealing
pipe
plugging device
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PCT/CN2021/081546
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English (en)
French (fr)
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罗益俊
石永龙
刘建辉
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中国五冶集团有限公司
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Publication of WO2022052438A1 publication Critical patent/WO2022052438A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing

Definitions

  • the invention relates to the technical field of bridge construction, in particular to an end plugging device used for grouting of prestressed pipelines.
  • the prestressed pipeline grouting work in the post-tensioned prestressed structural components can prevent the corrosion of the prestressed steel, make the prestressed steel and concrete effectively bond, realize the overall stress effect, and enhance the bearing capacity of the beam body.
  • the density of the slurry mainly depends on the formation of negative pressure in the pipeline and the pressure-holding effect during grouting.
  • the prestressed tendons were prematurely rusted and the durability of the structure was reduced.
  • This plugging method has the following deficiencies: 1.
  • the use of concrete or dry plastic cement slurry structure for wrapping and blocking can only be carried out after the strength of the concrete or dry plastic cement slurry structure meets the requirements, which takes a long time; 2. If the compactness or strength of the concrete or dry plastic cement slurry structure is insufficient (especially in winter), it is very easy to cause leakage, concrete or dry plastic cement slurry structure fracturing, etc. during the grouting process. Ensuring sufficient voltage stabilization time under the holding pressure specified in the specification will affect the grouting quality; 3. After the grouting is completed, the concrete or dry plastic cement slurry structure needs to be chiseled.
  • the purpose of the present invention is to provide an end plugging device for grouting prestressed pipelines, which is used to improve construction efficiency, improve the sealing effect of grouting, reduce construction costs, and shorten construction periods. .
  • an end plugging device for prestressed pipeline grouting comprising a sealing pipe used for covering the anchor and being sealedly connected with the anchor plate.
  • the sealing tube is detachably connected with the anchor plate.
  • a bolt mounting plate is provided at one end of the sealing pipe away from the anchor plate, and the bolt mounting plate is provided with a bolt that passes through the bolt mounting plate and is threaded with the anchor plate. connecting bolts.
  • the sealing pipe comprises a PVC pipe, a sealing gasket is arranged between one end of the PVC pipe and the anchor plate, and a sealing gasket is arranged between the other end of the PVC pipe and the bolt mounting plate. washer.
  • the sealing pipe comprises a steel pipe, a sealing washer is arranged between one end of the steel pipe and the anchor plate, and the other end of the steel pipe is welded or integrally formed with the bolt mounting plate.
  • the bolt mounting plate is provided with a plurality of adjustment grooves, and the bolts are slidably arranged in the adjustment grooves.
  • a rubber pad is arranged between the bolt and the bolt mounting plate.
  • a sealed space can be formed by connecting the sealing pipe and the anchor plate. After the sealing pipe is installed, the grouting work can be carried out, which saves extra waiting time and can effectively shorten the construction period.
  • the gap between the backing plates enters the inside of the sealing pipe, so that the pressure on the inner and outer sides of the anchor is balanced, and the pressure of the slurry can be continuously maintained during the grouting process to ensure the dense grouting, thereby ensuring the construction quality and service life of the bridge.
  • Fig. 1 is the installation schematic diagram of the end plugging device
  • Fig. 2 is the structural representation of the end plugging device
  • 1-anchor pad 2-anchor, 3-bolt mounting plate, 4-sealing pipe, 5-bolt, 6-sealing washer, 7-adjustment groove.
  • an end plugging device for grouting a prestressed pipeline includes a sealing tube 4 for covering the anchor 2 and sealingly connected to the anchor plate 1 .
  • the anchor plate 1 is installed on both ends of the corrugated pipe inside the bridge, the anchor 2 is installed on the outside of the through hole of the anchor plate 1, and the wire rope is pulled between the two anchors 2.
  • make the sealing pipe 4 cover the anchor 2 and seal with the anchor plate 1 pour the grout into the bellows through the grouting hole on the anchor plate 1, and let the air in the bellows be completely discharged by continuously pouring the grout. Due to the continuous infusion of the grout, part of the grout will enter the sealing tube 4 through the gap between the anchor 2 and the anchor plate 1, so that the pressure on the inner and outer sides of the anchor 2 can be balanced, so as to achieve stable, Continuous pressure keeping ensures that the pressure keeping effect meets the construction requirements and ensures the construction quality and service life of the bridge.
  • the sealing tube 4 and the anchor pad 1 are sealedly connected, so as to avoid leakage of the slurry from between the sealing tube 4 and the anchor pad 1, and avoid pressure loss caused by slurry leakage.
  • the sealing tube 4 can be provided with pressure as required, so as to enhance the stability and compressive strength of the sealing tube 4 and prevent the sealing tube 4 from detaching from the anchor plate 1 under the pressure of the slurry.
  • the pressure is maintained until the initial setting stage of the slurry, the initial setting of the slurry in the bellows does not need to exert pressure on the anchor 2, and the sealing tube 4 can be removed at this time. Since the grout on the anchor 2 is not completely solidified, it can be rinsed with clean water, which is convenient for the subsequent application of anti-corrosion paint to the anchor 2.
  • this solution can save the time for waiting for the concrete or dry plastic cement slurry structure to solidify and form, thereby effectively shortening the process cycle, and after the pressure holding is completed.
  • the slurry that is not completely solidified can be completely washed without residue, avoiding the interference caused by the spraying operation of the anchor 2 in the later stage.
  • the sealing tube 4 can be made of a tubular material. Compared with using a finished steel sealing cover, this solution has the advantages of convenient material acquisition and low use cost.
  • the sealing tube 4 is detachably connected to the anchor plate 1 .
  • it is convenient to quickly install or disassemble the sealing tube 4 and the anchor plate 1 , which is beneficial to enhance the stability, compressive strength and impact resistance of the sealing tube 4 .
  • the end of the sealing pipe 4 away from the anchor plate 1 is provided with a bolt mounting plate 3
  • the bolt mounting plate 3 is provided with a thread that passes through the bolt mounting plate 3 and is threaded with the anchor plate 1 Connecting bolts 5.
  • the detachable connection between the sealing tube 4 and the anchor plate 1 is realized by screwing the bolts 5 with the anchor plate 1.
  • the bolts 5 and the threaded holes of the anchor plate 1 are used in cooperation with each other, which is convenient to use. , fast loading and unloading and other advantages, do not need to process or destroy the structure of the anchor plate 1 itself, which can prevent the strength of the anchor plate 1 from being affected.
  • the sealing pipe 4 is a PVC pipe
  • a sealing washer 6 is arranged between one end of the PVC pipe and the anchor plate 1, and the other end of the PVC pipe is connected to the bolt mounting plate
  • a sealing gasket 6 is arranged between 3.
  • the PVC pipe has the advantages of low price, convenient material acquisition, convenient processing, etc., which is conducive to the rapid preparation of the sealing pipe 4, thereby improving the construction efficiency.
  • Setting the sealing gaskets 6 at both ends of the PVC pipe can make the PVC pipe and the anchorage pads 1 and 1 respectively.
  • the bolted mounting plate 3 forms a sealed connection. During grouting, pressure is applied to the PVC pipe through the bolt mounting plate 3, which can enhance the sealing strength between the PVC pipe and the anchor plate 1, and between the PVC pipe and the bolt mounting plate 3, thereby effectively preventing the leakage of the slurry.
  • PVC pipes are selected, and PVC pipes with different diameters can be selected according to the size of the anchor 2
  • the sealing pipe 4 can also be a steel pipe, a sealing washer 6 is provided between one end of the steel pipe and the anchor plate 1, and the other end of the steel pipe is welded or integrally formed with the bolt mounting plate 3.
  • the steel pipe also has the advantages of convenient material acquisition and convenient processing, and its strength and compressive performance are higher and not easy to be damaged, which can prevent the sealing pipe 4 from cracking under the pressure of the slurry and causing the slurry to leak.
  • the bolt mounting plate 3 is provided with a plurality of adjustment grooves 7 , and the bolts 5 are slidably arranged in the adjustment grooves 7 .
  • the number of the adjustment grooves 7 is determined according to the number of the bolts 5, so that the bolts 5 and the adjustment grooves 7 are arranged in a one-to-one correspondence.
  • the anchor plate 1 is generally provided with four threaded holes. In this solution, two bolts are used, and the two bolts are arranged diagonally. There are two corresponding adjustment grooves 7 arranged diagonally. According to the different size of the anchor plate 1, the spacing of the threaded holes on the anchor plate 1 is also different, so that the bolt 5 is slidably arranged in the adjustment groove 7 to adjust the position of the bolt 5 according to the position of the threaded hole, thereby
  • the bolt mounting plate 3 can be used in cooperation with anchor plates 1 of various sizes, thereby increasing the scope of application.
  • a rubber pad is arranged between the bolt 5 and the bolt mounting plate 3 .
  • the elastic deformation of the rubber pad can eliminate the gap between the bolt 5 and the bolt mounting plate 3 due to machining errors, thereby improving the stability of the bolt 5 and making the pressure exerted by the bolt 5 on the bolt mounting plate 3 more stable and reliable.

Abstract

一种用于预应力管道压浆的端头封堵装置，在锚具垫板(1)上安装罩住锚具(2)的密封管(4)，使密封管(4)与锚具垫板(1)密封连接；通过锚具垫板(1)上的灌浆孔向波纹管内灌注混凝土以进行压浆工作；混凝土初凝阶段移除密封管(4)，并对锚具处进行清洗，去除锚具处没有完全凝固的混凝土。该装置利用密封管与锚具垫板连接能够形成密闭的空间，密封管安装好之后即可进行压浆的工作，省去额外的等待时间而能够有效缩短工期，灌注的浆液通过锚具与锚具垫板之间的间隙进入密封管内部，使锚具内外两侧的压力保持平衡，能够在压浆的过程中持续保持浆液的压力而保证压浆密实，从而保证桥梁的施工质量以及使用寿命。

Description

一种用于预应力管道压浆的端头封堵装置 技术领域
本发明涉及桥梁施工技术领域，具体的说，是一种用于预应力管道压浆的端头封堵装置。
背景技术
预应力管道压浆工作在后张预应力结构构件中具有防止预应力钢材锈蚀、使预应力钢材与混凝土有效粘结，实现整体应力效果，增强梁体的承载能力。采用真空压浆工艺进行管道压浆时，浆体密实程度主要取决于管道负压的形成和压浆时的保压效果。在以往的工程实践中，由于施工人员对孔道压浆的工艺未引起足够重视，导致预应力筋过早生锈，降低结构耐久性。
目前，我国大部分桥梁预应力管道压浆端头封堵采用混凝土或干塑状水泥浆进行包裹封堵锚具与锚具垫板之间的间隙，部分也采用成品钢密封罩进行封堵锚具与锚具垫板之间的间隙，以此对桥梁内部的波纹管进行保压。
这种封堵方式有以下几个不足：1、采用混凝土或干塑状水泥浆结构进行包裹封堵要等混凝土或干塑状水泥浆结构的强度满足要求后才能进行压浆，占用时间长；2、如果混凝土或干塑状水泥浆结构的密实度不足或者强度不够(尤其是冬季)，会在压浆过程中极易出现漏浆、混凝土或干塑状水泥浆结构压裂等情况，无法在规范规定的持压压力下保证足够的稳压时间，影响压浆质量；3、压浆完成后，还需将混凝土或干塑状水泥浆结构凿除，凿除过程中容易对钢绞线和夹片造成扰动，进而影响预应力质量，且夹片与钢绞线之间的缝隙内的灰渣很难凿除干净，进而影响锚头防水涂料的涂刷效果；4、成品钢密封罩对焊接质量及密封要求高，现场加工质量不易保证，外购成本较高，不经济。
发明内容
为克服现有技术的不足，本发明的目的在于提供一种用于预应力管 道压浆的端头封堵装置，用于提高施工效率，提高压浆的密闭效果，降低施工成本、缩短施工周期。
本发明通过下述技术方案实现：一种用于预应力管道压浆的端头封堵装置，包括用于罩住锚具且与锚具垫板密封连接的密封管。
进一步地，为了更好的实现本发明，所述的密封管与锚具垫板可拆卸连接。
进一步地，为了更好的实现本发明，所述的密封管远离锚具垫板的一端设置有螺栓安装板，所述的螺栓安装板上设置有穿过螺栓安装板且与锚具垫板螺纹连接的螺栓。
进一步地，为了更好的实现本发明，所述的密封管包括PVC管，PVC管的一端与锚具垫板之间设置有密封垫圈，PVC管的另一端与螺栓安装板之间设置有密封垫圈。
进一步地，为了更好的实现本发明，所述的密封管包括钢管，钢管的一端与锚具垫板之间设置有密封垫圈，钢管的另一端与螺栓安装板焊接或一体成型。
进一步地，为了更好的实现本发明，所述的螺栓安装板上设置有若干个调节槽，所述的螺栓滑动设置在调节槽内。
进一步地，为了更好的实现本发明，所述的螺栓与螺栓安装板之间设置有橡胶垫。
本方案所取得的有益效果是：
本方案利用密封管与锚具垫板连接能够形成密闭的空间，密封管安装好之后即可进行压浆的工作，省去额外的等待时间而能够有效缩短工期，灌注的浆液通过锚具与锚具垫板之间的间隙进入密封管内部，使锚具内外两侧的压力保持平衡，能够在压浆的过程中持续保持浆液的压力而保证压浆密实，从而保证桥梁的施工质量以及使用寿命。
附图说明
图1为端头封堵装置的安装示意图；
图2为端头封堵装置的结构示意图；
其中1-锚具垫板，2-锚具，3-螺栓安装板，4-密封管，5-螺栓，6-密封垫圈，7-调节槽。
具体实施方式
下面结合实施例对本发明作进一步地详细说明，但本发明的实施方式不限于此。
实施例1：
如图1所示，本实施例中，一种用于预应力管道压浆的端头封堵装置，包括用于罩住锚具2且与锚具垫板1密封连接的密封管4。
锚具垫板1安装在桥梁内部波纹管的两端，锚具2安装在锚具垫板1的通孔外侧，两个锚具2之间对拉钢丝绳。施工时，使密封管4罩住锚具2并与锚具垫板1密封连接，通过锚具垫板1上的灌浆孔向波纹管内灌注浆液，通过持续灌注浆液使波纹管内的空气完全排出，由于持续灌注浆液，部分浆液会通过锚具2与锚具垫板1之间的间隙进入到密封管4内，从而使锚具2内外两侧所受到的压力保持平衡，以此能够实现稳定、持续保压，从而保证保压效果满足施工要求，保证桥梁施工质量以及使用寿命。使密封管4与锚具垫板1密封连接，能够避免浆液从密封管4与锚具垫板1之间泄漏，避免出现漏浆而引起的压力损失。根据需要能够对密封管4提供压力，以增强密封管4的稳定性以及抗压强度，避免密封管4在浆液的压力作用下与锚具垫板1脱离。
保压直至浆液初凝阶段，波纹管内的浆液初凝不需要再对锚具2施加压力，此时能够将密封管4拆除。锚具2上的浆液由于没有完全凝固，能够使用清水冲洗干净，方便后续对锚具2涂刷防腐蚀涂料。
相较于现有技术使用凝固成型的混凝土或干塑状水泥浆结构，本方案能够省去等待混凝土或干塑状水泥浆结构凝固成型的时间，从而能够有效缩短工艺周期，并且保压完成后的浆液需要使用水流冲洗即可，不需要进行凿出，使得操作更加方便快捷，没有完全凝固的浆液能够完全 冲洗干净而不会有残留，避免后期对锚具2进行喷涂作业而造成干扰。
所述的密封管4能够采用管状材料，相较于使用成品钢密封罩，本方案具有取材方便、使用成本低等优点。
本方案安装、拆卸均不会对密封管4造成破坏，并且密封管4能够反复使用，具有重复利用率高的优点，有利于降低施工成本。
实施例2：
在上述实施例的基础上，本实施例中，所述的密封管4与锚具垫板1可拆卸连接。以此方便密封管4与锚具垫板1进行快速安装或拆卸，有利于增强密封管4的稳定性、抗压强度以及抗冲击能力。
本实施例中，所述的密封管4远离锚具垫板1的一端设置有螺栓安装板3，所述的螺栓安装板3上设置有穿过螺栓安装板3且与锚具垫板1螺纹连接的螺栓5。利用螺栓5与锚具垫板1螺纹连接实现密封管4与锚具垫板1的可拆卸连接，所述的螺栓5与锚具垫板1本身自带的螺纹孔相互配合使用，具有使用方便、装卸快捷等优点，不用加工、破坏锚具垫板1本身的结构，能够避免锚具垫板1的强度受到影响。
实施例3：
在上述实施例的基础上，本实施例中，所述的密封管4采用PVC管，PVC管的一端与锚具垫板1之间设置有密封垫圈6，PVC管的另一端与螺栓安装板3之间设置有密封垫圈6。
PVC管具有价格便宜、取材方便、加工方便等优点，有利于快速制备密封管4，从而能够提高施工效率，在PVC管的两端设置密封垫圈6能够使PVC管分别与锚具垫板1、螺栓安装板3形成密封连接。压浆时，通过螺栓安装板3对PVC管施加压力，能够增强PVC管与锚具垫板1、PVC管与螺栓安装板3之间的密封强度，从而有效防止浆液泄漏。
选用PVC管，能够根据锚具2的尺寸选用不同直径的PVC管
本实施例中，所述的密封管4也能够采用钢管，钢管的一端与锚具垫板1之间设置有密封垫圈6，钢管的另一端与螺栓安装板3焊接或一 体成型。
钢管也具有取材方便、加工方便的优点，并且其强度和抗压性能更高而不易损坏，能够避免密封管4在浆液的压力作用下裂开而导致浆液泄漏。
实施例4：
在上述实施例的基础上，本实施例中，所述的螺栓安装板3上设置有若干个调节槽7，所述的螺栓5滑动设置在调节槽7内。
本实施例中，所述的调节槽7的数量根据螺栓5的数量确定，使螺栓5与调节槽7一一对应设置。所述的锚具垫板1上一般设置有四个螺纹孔，本方案采用两个螺栓，并使两个螺栓呈对角分布。相应的调节槽7设置有两个，且呈对角分布。根据锚具垫板1尺寸的不同，锚具垫板1上的螺纹孔的间距也不相同，使螺栓5滑动设置在调节槽7内能够根据螺纹孔的位置对螺栓5的位置进行调节，从而使螺栓安装板3能够与多种尺寸的锚具垫板1相互配合使用，以此增加适用范围。
所述的螺栓5与螺栓安装板3之间设置有橡胶垫。利用橡胶垫的弹性变形能够消除螺栓5与螺栓安装板3之间因加工误差而存在的间隙，从而提高螺栓5的稳定性，使螺栓5对螺栓安装板3施加的压力更加稳定可靠。
本实施例中，其它未描述的内容与上述实施例相同，故不赘述。
以上所述，仅是本发明的较佳实施例，并非对本发明做任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化，均落入本发明的保护范围之内。

Claims (7)

  1. 一种用于预应力管道压浆的端头封堵装置，其特征在于：包括用于罩住锚具且与锚具垫板密封连接的密封管。
  2. 根据权利要求1所述的一种用于预应力管道压浆的端头封堵装置，其特征在于：所述的密封管与锚具垫板可拆卸连接。
  3. 根据权利要求2所述的一种用于预应力管道压浆的端头封堵装置，其特征在于：所述的密封管远离锚具垫板的一端设置有螺栓安装板，所述的螺栓安装板上设置有穿过螺栓安装板且与锚具垫板螺纹连接的螺栓。
  4. 根据权利要求3所述的一种用于预应力管道压浆的端头封堵装置，其特征在于：所述的密封管包括PVC管，PVC管的一端与锚具垫板之间设置有密封垫圈，PVC管的另一端与螺栓安装板之间设置有密封垫圈。
  5. 根据权利要求3所述的一种用于预应力管道压浆的端头封堵装置，其特征在于：所述的密封管包括钢管，钢管的一端与锚具垫板之间设置有密封垫圈，钢管的另一端与螺栓安装板焊接或一体成型。
  6. 根据权利要求3～5中任一项所述的一种用于预应力管道压浆的端头封堵装置，其特征在于：所述的螺栓安装板上设置有若干个调节槽，所述的螺栓滑动设置在调节槽内。
  7. 根据权利要求6所述的一种用于预应力管道压浆的端头封堵装置，其特征在于：所述的螺栓与螺栓安装板之间设置有橡胶垫。
PCT/CN2021/081546 2020-09-09 2021-03-18 一种用于预应力管道压浆的端头封堵装置 WO2022052438A1 (zh)

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