CN104989432B - The construction method in opening shaped steel consolidation by grouting tunnel - Google Patents
The construction method in opening shaped steel consolidation by grouting tunnel Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract 46
- 239000010959 steel Substances 0.000 title claims abstract 46
- 238000010276 construction Methods 0.000 title claims abstract 8
- 238000007596 consolidation process Methods 0.000 title 1
- 230000002787 reinforcement Effects 0.000 claims abstract 3
- 238000005259 measurement Methods 0.000 claims abstract 2
- 239000000853 adhesive Substances 0.000 claims 4
- 230000001070 adhesive effect Effects 0.000 claims 4
- 239000000945 filler Substances 0.000 claims 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- 239000011083 cement mortar Substances 0.000 claims 2
- 239000003822 epoxy resin Substances 0.000 claims 2
- 239000003292 glue Substances 0.000 claims 2
- 229920000647 polyepoxide Polymers 0.000 claims 2
- 239000000741 silica gel Substances 0.000 claims 2
- 229910002027 silica gel Inorganic materials 0.000 claims 2
- 239000000126 substance Substances 0.000 claims 2
- 238000004382 potting Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract 1
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Abstract
本发明提供了一种开口型钢灌浆加固隧道的施工方法，包括如下步骤：(1)首先对隧道变形情况进行测量，根据测量结果，制作多个开口型钢单元，开口型钢单元的形状与盾构管片待加固的内弧面相吻合；(2)在盾构管片待加固的内弧面上安装开口型钢：依序将多个开口型钢单元相互固定串接，以形成开口型钢，开口型钢内部形成中空的一圆弧管通道；(3)提供多个固定连接件，以分别将各个开口型钢单元固定在盾构管片待加固的内弧面上；(4)在开口型钢上设置填充孔，通过填充孔灌注入填充物。在对原隧道结构进行加固处理时具有加固效果好、成本低、工期短、随型性高等特点。
The invention provides a construction method for opening-shaped steel grouting reinforced tunnels, which includes the following steps: (1) firstly measure the deformation of the tunnel, and make a plurality of open-shaped steel units according to the measurement results, the shape of the open-shaped steel units and the shield tube (2) Install the open section steel on the inner arc surface of the shield segment to be reinforced: multiple open section steel units are fixed and connected in series to form the open section steel, and the open section steel is formed inside A hollow arc tube channel; (3) provide multiple fixed connectors to respectively fix each open-shaped steel unit on the inner arc surface of the shield segment to be reinforced; (4) set filling holes on the open-shaped steel, Pour the filling through the filling hole. When the original tunnel structure is reinforced, it has the characteristics of good reinforcement effect, low cost, short construction period and high conformity.
Description
技术领域technical field
本发明属于建筑技术领域，涉及一种隧道结构加固的施工方法，特别涉及一种开口型钢灌浆加固隧道的施工方法。The invention belongs to the technical field of construction, and relates to a construction method for tunnel structure reinforcement, in particular to a construction method for opening-shaped steel grouting reinforcement tunnels.
背景技术Background technique
随着市政建设的高速发展，基本建设对地下空间的利用与日俱增，隧道越建越多，然而，在隧道建设取得成绩的同时，一些营运中的隧道由于使用年限不断增加，加之地质因素、局部超载、行车环境以及线路周边工程基坑不当开挖等不利影响，以及防排水设施的老化，使得局部区域隧道管片结构变形以及开裂、剥落等现象，如果变形进一步增大，将危及行车安全，有时被迫关闭交通，进行病害整治。世界各国每年要耗巨资用于加固破损隧道，以保证安全。因此，发明一种低成本、高效率的隧道加固措施，就变得非常重要。目前，用于隧道加固的方法主要有：With the rapid development of municipal construction, the use of underground space by basic construction is increasing day by day, and more and more tunnels are built. , driving environment, improper excavation of engineering foundation pits around the line and other adverse effects, as well as the aging of waterproof and drainage facilities, will cause deformation, cracking and peeling of the tunnel segment structure in some areas. If the deformation increases further, it will endanger driving safety. Sometimes Traffic was forced to be closed for disease control. Countries all over the world spend huge sums of money every year to strengthen damaged tunnels to ensure safety. Therefore, it is very important to invent a low-cost, high-efficiency tunnel reinforcement measure. At present, the methods used for tunnel reinforcement mainly include:
一、粘贴钢板加固1. Paste steel plate reinforcement
粘贴钢板加固是根据设计要求切割成一定尺寸的钢板，采用专用举重臂，在隧道管片结构内侧分段安装厚钢板，再用膨胀螺栓分别固定，然后使用电焊将各钢板焊接成一体，形成与隧道内壁形状基本一致的钢环，最后，在钢环与管片结构的间隙中灌注结构胶(如环氧树脂等)。Paste steel plate reinforcement is to cut steel plates of a certain size according to the design requirements, use a special lifting arm, install thick steel plates in sections on the inner side of the tunnel segment structure, and then fix them with expansion bolts, and then use electric welding to weld the steel plates into one body to form a A steel ring with the same shape as the inner wall of the tunnel. Finally, pour structural glue (such as epoxy resin, etc.) into the gap between the steel ring and the segment structure.
该工法已用于营运的地铁隧道结构加固中，但在实践过程中也暴露了一些弊病，如钢板自重过大、专用举重设备需长距离进出场、焊缝多、焊接质量波动大、明火欠安全、钢板与管片的后灌浆粘结差使加固效果大打折扣、钢结构腐蚀问题及工期长、加固造价高等，这些问题妨碍着此方法的推广使用。This construction method has been used in the structural reinforcement of subway tunnels in operation, but some disadvantages have been exposed in the practice process, such as excessive self-weight of steel plates, long-distance entry and exit of special lifting equipment, many welds, large fluctuations in welding quality, and insufficient open flames. Safety, poor post-grouting bonding between steel plates and segments greatly reduces the reinforcement effect, steel structure corrosion problems, long construction period, and high reinforcement cost, etc. These problems hinder the popularization and use of this method.
二.粘贴碳纤维布加固法2. Paste carbon fiber cloth reinforcement method
碳纤维布是一种单向碳纤维加固产品，强度高，密度小，厚度薄，基本不增加加固构件自重及截面尺寸，这种加固方法具有运输方便，施工快捷的优点，用于对隧道加固，可以明显提高结构强度，因而已被广泛应用于建筑结构的补强加固领域，碳纤维布加固施工方法的好坏，影响着碳纤维布对构件加固的可靠度，也是决定整个加固工程安全可靠的重要因素。Carbon fiber cloth is a unidirectional carbon fiber reinforced product with high strength, low density and thin thickness, which basically does not increase the self-weight and cross-sectional size of the reinforced member. This reinforcement method has the advantages of convenient transportation and fast construction. It can be used for tunnel reinforcement. Significantly improve the structural strength, so it has been widely used in the field of reinforcement and reinforcement of building structures. The quality of carbon fiber sheet reinforcement construction method affects the reliability of carbon fiber sheet reinforcement to components, and is also an important factor that determines the safety and reliability of the entire reinforcement project.
但是，在对营运的地铁隧道结构加固时，粘结剂是否充分固化是一个不容忽视的问题，目前用于结构加固的粘结剂都是常温固化，2-3小时指触固化，1-7天100％固化，即粘结剂要达到100％的强度至少需要24小时以上的时间，但已营运地铁的特点，是只能利用地铁夜间停运的3-4小时进行施工。因此，在粘结剂还没达到强度之前，地铁又要运行了，振动的作用使粘结剂难于彻底固化，从而严重影响了结构加固的效果。并且，碳纤维具有导电性，容易接触到隧道复杂的供电触网系统，导致触电或短路事故。However, when strengthening the structure of the subway tunnel in operation, whether the adhesive is fully cured is a problem that cannot be ignored. Currently, the adhesives used for structural reinforcement are all cured at room temperature, 2-3 hours finger-touch curing, 1-7 100% curing every day, that is, it takes at least 24 hours for the adhesive to reach 100% strength, but the characteristics of the subway in operation can only be constructed within 3-4 hours when the subway is out of service at night. Therefore, before the adhesive has reached its strength, the subway will run again, and the effect of vibration will make it difficult for the adhesive to solidify completely, thereby seriously affecting the effect of structural reinforcement. Moreover, carbon fiber is conductive, and it is easy to come into contact with the complex power supply catenary system of the tunnel, resulting in electric shock or short circuit accidents.
三.复合腔体加固法3. Composite cavity reinforcement method
复合腔体构件，包括腔体本体，复合材料层，注浆孔，排气孔，螺栓孔和填充物。腔体本体的形状与加固面相吻合，一根或一根以上的管材组合成腔体本体，腔体本体表面设有复合材料层，复合材料层由树脂及纤维组成，腔体本体内灌注填充物。腔体本体为金属管或非金属管，如钢管、塑料管、复合材料管等。复合腔体构件具有重量轻、便于运输、施工快捷等优点。复合腔体外包复合材料由树脂和纤维通过真空、加热、RTM或手糊等复合材料制造工艺在腔体表面形成，加工工艺复杂，造价高，并且有些复合材料成分具有导电性，容易接触隧道电网，导致触电或短路，同时，外包复合材料导致腔体本体和隧道结构的随型性差，也会影响加固效果，且表面包覆复合材料对隧道承载力增加作用不明显。Composite cavity components, including cavity body, composite material layers, grouting holes, vent holes, bolt holes and fillers. The shape of the cavity body matches the reinforcement surface. One or more pipes are combined to form the cavity body. The surface of the cavity body is provided with a composite material layer. The composite material layer is composed of resin and fiber, and the cavity body is filled with fillers. . The cavity body is metal pipe or non-metal pipe, such as steel pipe, plastic pipe, composite material pipe, etc. Composite cavity components have the advantages of light weight, convenient transportation, and quick construction. Composite cavity outsourcing composite materials are formed on the surface of the cavity by resin and fiber through composite material manufacturing processes such as vacuum, heating, RTM or hand lay-up. The processing technology is complicated and the cost is high, and some composite material components are conductive and easy to contact the tunnel grid , leading to electric shock or short circuit. At the same time, the outsourcing of composite materials leads to poor conformity of the cavity body and tunnel structure, which will also affect the reinforcement effect, and the surface coating of composite materials has no obvious effect on increasing the tunnel's bearing capacity.
发明内容Contents of the invention
为克服现有技术所存在的缺陷，本发明的目的在于提供一种开口型钢灌浆加固隧道的施工方法，解决了现有技术中存在的自重大、易腐蚀、机械化依赖性高，粘结剂未充分固化，以及容易触电或短路、加固效果差、成本高、随型性差、工期长等难题。In order to overcome the defects existing in the prior art, the object of the present invention is to provide a construction method for opening-shaped steel grouting reinforced tunnels, which solves the existing problems in the prior art, such as heavy weight, easy corrosion, high dependence on mechanization, and the absence of adhesives. Full curing, and easy electric shock or short circuit, poor reinforcement effect, high cost, poor conformability, long construction period and other problems.
一种开口型钢灌浆加固隧道的施工方法，包括：A construction method for opening-shaped steel grouting reinforced tunnels, comprising:
(1)对隧道变形情况进行测量，根据测量结果，制作多个开口型钢单元，所述开口型钢单元的形状与盾构管片待加固的内弧面相吻合；(1) measure the deformation of the tunnel, and make a plurality of open-shaped steel units according to the measurement results, the shape of the open-shaped steel units matches the inner arc surface of the shield segment to be reinforced;
(2)在盾构管片待加固的内弧面上安装开口型钢：依序将多个所述开口型钢单元相互固定串接以形成环设所述内弧面的开口型钢，所述开口型钢内部形成中空的圆弧管通道，所述开口型钢单元通过提供的固定连接件固定在所述盾构管片待加固的内弧面上；(2) Install open-shaped steel on the inner arc surface of the shield segment to be reinforced: a plurality of said open-shaped steel units are fixed and connected in series to form an open-shaped steel surrounding the inner arc surface, and said open-shaped steel A hollow arc tube channel is formed inside, and the open-shaped steel unit is fixed on the inner arc surface of the shield segment to be reinforced through the provided fixed connector;
(3)通过在所述开口型钢单元上设置的填充孔将填充物灌注入所述圆弧管通道。(3) Filling is poured into the arc tube channel through the filling hole provided on the open-shaped steel unit.
优选地，在步骤(2)中，包括：先将多个所述开口型钢单元相互固定串接形成开口型钢，然后通过固定连接件将所述开口型钢固定在所述盾构管片待加固的内弧面上。Preferably, in step (2), it includes: first fixing and connecting a plurality of said open-shaped steel units to each other in series to form open-shaped steel, and then fixing said open-shaped steel on the shield segment to be reinforced through a fixed connector. on the inner arc.
优选地，在步骤(2)中，包括：通过固定连接件将各个所述开口型钢单元排列固定在所述盾构管片待加固的内弧面上，然后将多个所述开口型钢单元相互固定串接以形成开口型钢。Preferably, in step (2), it includes: arranging and fixing each of the open-shaped steel units on the inner arc surface of the shield segment to be reinforced through a fixed connector, and then connecting a plurality of the open-shaped steel units to each other Fastened in series to form open sections.
优选地，所述步骤(2)中，相邻的两个所述开口型钢单元之间采用内插接头或电焊而固定连接在一起。Preferably, in the step (2), two adjacent open-shaped steel units are fixedly connected together by means of an insertion joint or electric welding.
优选地，在所述开口型钢单元与所述盾构管片接触处涂抹粘结剂，所述粘结剂为无溶剂型改性环氧树脂类粘钢灌注胶或硅胶。Preferably, an adhesive is applied at the contact between the open-shaped steel unit and the shield segment, and the adhesive is a solvent-free modified epoxy resin-based steel bonding glue or silica gel.
优选地，所述固定连接件为膨胀螺栓或化学螺栓，所述填充物为微膨胀水泥砂浆或者微膨胀混凝土。Preferably, the fixed connectors are expansion bolts or chemical bolts, and the filler is micro-expansion cement mortar or micro-expansion concrete.
一种开口型钢灌浆加固隧道的结构，包括：与盾构管片待加固的内弧面对应的开口型钢单元，多个所述开口型钢单元相互固定串接而形成环设所述内弧面且具有中空的圆弧管通道的开口型钢，多个所述开口型钢单元经由固定连接件与所述盾构管片待加固的内弧面固定连接，所述圆弧管通道内灌注有填充物。A structure of an open-shaped steel grouting reinforced tunnel, comprising: an open-shaped steel unit corresponding to the inner arc surface of a shield segment to be reinforced, and a plurality of the open-shaped steel units are fixed and connected in series to form a ring around the inner arc surface And there is an open-shaped steel with a hollow arc tube channel, a plurality of the open-shaped steel units are fixedly connected with the inner arc surface of the shield segment to be reinforced through a fixed connector, and the arc tube channel is filled with filler .
优选地，所述开口型钢单元包括一型钢板以及由型钢板两侧朝同一方向翻折形成翻折边。Preferably, the open-shaped steel unit includes a shaped steel plate and two sides of the shaped steel plate are folded in the same direction to form a folded edge.
优选地，所述固定连接件为膨胀螺栓或化学螺栓；所述开口型钢单元上设置有供灌注填充物的填充孔，所述填充物为微膨胀水泥砂浆或者微膨胀混凝土。Preferably, the fixed connector is an expansion bolt or a chemical bolt; the open-shaped steel unit is provided with a filling hole for pouring a filler, and the filler is a micro-expansion cement mortar or a micro-expansion concrete.
优选地，在所述开口型钢单元和盾构管片接触处涂抹有粘结剂，所述粘结剂为无溶剂型改性环氧树脂类粘钢灌注胶或硅胶。Preferably, an adhesive is applied at the contact between the open-shaped steel unit and the shield segment, and the adhesive is a solvent-free modified epoxy resin-based steel bonding glue or silica gel.
本发明提供了一种开口型钢灌浆加固隧道的施工方法，通过提供与盾构管片待加固的内弧面相吻合的多个开口型钢单元，多个所述开口型钢单元连通形成中空的一圆弧管通道，通过固定连接件将多个开口型钢单元固定早盾构管片待加固的内弧面上，在所述圆弧管通道内灌注填充物，从而填充物和开口型钢形成新的加固体联合原隧道结构体共同受力，解决了现有技术中易腐蚀、机械化依赖性高，粘结剂未充分固化，以及容易触电或短路的问题，且在对原隧道结构进行加固处理时具有加固效果好、成本低、工期短、随型性高等特点。The invention provides a construction method for tunnel reinforced by grouting with open-shaped steel. By providing a plurality of open-shaped steel units matching the inner arc surface of the shield segment to be reinforced, the plurality of open-shaped steel units are connected to form a hollow circular arc. Pipe channel, fix multiple open-shaped steel units on the inner arc surface of the shield segment to be reinforced through fixed connectors, pour fillers into the circular arc tube channel, so that the filler and open-shaped steel form a new reinforcement Combined with the original tunnel structure to bear the force, it solves the problems of easy corrosion, high mechanization dependence, insufficient curing of the adhesive, and easy electric shock or short circuit in the existing technology, and it has the effect of strengthening the original tunnel structure when it is reinforced. It has the characteristics of good effect, low cost, short construction period and high adaptability.
附图说明Description of drawings
图1为本发明开口型钢灌浆加固隧道的施工方法的工序流程图；Fig. 1 is the process flowchart of the construction method of open-shaped steel grouting reinforced tunnel of the present invention;
图2为本发明开口型钢灌浆加固隧道的施工方法的结构示意图；以及Fig. 2 is the structural representation of the construction method of open-shaped steel grouting reinforced tunnel of the present invention; And
图3为图2的A-A剖面图。FIG. 3 is a cross-sectional view along line A-A of FIG. 2 .
具体实施方式detailed description
为利于对本发明的结构的了解，以下结合附图及实施例进行说明。In order to facilitate the understanding of the structure of the present invention, the following description will be made in conjunction with the accompanying drawings and embodiments.
结合图1-图3所示，图1为本发明开口型钢灌浆加固隧道的施工方法的工序流程图，图2为本发明开口型钢灌浆加固隧道的施工方法的结构示意图，图3为图2的A-A剖面图。请参阅图1-图3，本发明提供了一种开口型钢灌浆加固隧道的施工方法，包括如下步骤：In conjunction with Fig. 1-shown in Fig. 3, Fig. 1 is the process flowchart of the construction method of the open-shaped steel grouting reinforced tunnel of the present invention, Fig. 2 is the structural representation of the construction method of the open-shaped steel grouted reinforced tunnel of the present invention, Fig. 3 is the construction method of Fig. 2 A-A section view. Please refer to Fig. 1-Fig. 3, the present invention provides a kind of construction method of open section steel grouting reinforcement tunnel, comprises the steps:
步骤S1，首先对隧道变形情况进行测量，根据测量结果，制作多个开口型钢单元2，所述开口型钢单元2的形状与盾构管片1待加固的内弧面相吻合。本实施例中，开口型钢单元2包括一型钢板以及由型钢板两侧朝同一方向翻折形成一对翻折边，将开口型钢单元2贴合盾构管片1待加固的内弧面上，使得开口型钢单元2的内部形成有中空的容置通道。In step S1, the deformation of the tunnel is firstly measured, and according to the measurement results, a plurality of open-shaped steel units 2 are manufactured, and the shape of the open-shaped steel units 2 matches the inner arc surface of the shield segment 1 to be reinforced. In this embodiment, the open-shaped steel unit 2 includes a steel plate and a pair of folded edges formed by turning both sides of the steel plate in the same direction, and the open-shaped steel unit 2 is attached to the inner arc surface of the shield segment 1 to be reinforced. , so that a hollow accommodating channel is formed inside the open-shaped steel unit 2 .
步骤S2，在盾构管片1待加固的内弧面上安装开口型钢：依序将多个开口型钢单元2相互固定串接，以形成环设所述内弧面的开口型钢，所述开口型钢内部形成中空的一圆弧管通道。进一步地，同一圆弧管通道中，相邻的两个开口型钢单元2之间采用内插接头或电焊进行连接。更进一步地，在所述开口型钢单元2和盾构管片1接触处涂抹粘结剂6，所述粘结剂6可以为优质A级无溶剂型改性环氧树脂类粘钢灌注胶或硅胶，本实施例中选用优质A级无溶剂型改性环氧树脂类粘钢灌注胶，主要起到在灌浆时起临时密封作用。Step S2, installing open-shaped steel on the inner arc surface of the shield segment 1 to be reinforced: sequentially connecting a plurality of open-shaped steel units 2 to each other in series to form an open-shaped steel surrounding the inner arc surface, the opening A hollow arc tube channel is formed inside the section steel. Further, in the same arc tube channel, two adjacent open-shaped steel units 2 are connected by inserting joints or electric welding. Furthermore, the adhesive 6 is applied at the contact between the open-shaped steel unit 2 and the shield segment 1, and the adhesive 6 can be a high-quality A-grade solvent-free modified epoxy resin-based steel-bonding potting glue or Silica gel, in this embodiment, high-quality grade A solvent-free modified epoxy resin bonding steel perfusion glue is selected, which mainly plays a role of temporary sealing during grouting.
步骤S3，提供固定连接件4，以将开口型钢单元2固定在盾构管片1待加固的内弧面上。本实施例中，所述固定连接件4为膨胀螺栓或化学螺栓，通过在开口型钢单元2上开设螺栓孔，以供膨胀螺栓或化学螺栓穿设。进一步地，每个开口型钢单元2上设置两个膨胀螺栓，使得开口型钢单元2的加固效果更加稳定。Step S3, providing a fixing connector 4 to fix the open-shaped steel unit 2 on the inner arc surface of the shield segment 1 to be reinforced. In this embodiment, the fixed connector 4 is an expansion bolt or a chemical bolt, and a bolt hole is opened on the open-shaped steel unit 2 for the expansion bolt or chemical bolt to pass through. Further, two expansion bolts are arranged on each open-shaped steel unit 2, so that the reinforcement effect of the open-shaped steel unit 2 is more stable.
在待加固的内弧面上安装开口型钢单元2时，具有两种实施方式，其中，When installing the open section steel unit 2 on the inner arc surface to be reinforced, there are two implementation modes, wherein,
实施例1：Example 1:
先将多个开口型钢单元相互电焊串接形成开口型钢，然后通过固定连接件将所述开口型钢整体固定在盾构管片待加固的内弧面上。First, a plurality of open-shaped steel units are connected in series by electric welding to form the open-shaped steel, and then the open-shaped steel is integrally fixed on the inner arc surface of the shield segment to be reinforced through a fixed connector.
实施例2：Example 2:
通过固定连接件将各个所述开口型钢单元2排列固定在盾构管片待加固的内弧面上，同一圆弧管通道中的两个开口型钢单元2端部对齐并抵触连通，然后，电焊连串接盾构管片待加固的内弧面上相邻的所述开口型钢单元2以形成开口型钢。Arrange and fix each of the open-shaped steel units 2 on the inner arc surface of the shield segment to be reinforced by fixing the connectors, and the ends of the two open-shaped steel units 2 in the same circular arc tube channel are aligned and communicated with each other, and then electric welding The adjacent open-shaped steel units 2 on the inner arc surface of the shield segment to be reinforced are connected in series to form open-shaped steel.
步骤S4，在开口型钢上设置填充孔3，通过填充孔3灌注入填充物5。本实施例中，所述填充物5为微膨胀水泥砂浆或者微膨胀混凝土，填充孔3设置在相邻的两个开口型钢单元2之间。当然，在具体运用中填充孔可以设置在开口型钢单元2两侧的翻折边上，也可以设置在钢板中部的任意位置，并不限于本实施例。通常填充孔3在开口型钢单元作为成品出厂时，就设置好了，可以在每一个开口型钢单元2上设置一个或多个填充孔3，也可以是开口型钢上的部分开口型钢单元2上设置一个或多个填充孔3，可根据隧道的实际变形情况做出选择。In step S4, a filling hole 3 is provided on the open section steel, and the filler 5 is poured through the filling hole 3 . In this embodiment, the filler 5 is micro-expansion cement mortar or micro-expansion concrete, and the filling hole 3 is arranged between two adjacent open-shaped steel units 2 . Of course, in specific applications, the filling holes can be set on the folded edges on both sides of the open-shaped steel unit 2, or can be set at any position in the middle of the steel plate, and are not limited to this embodiment. Usually the filling hole 3 is set when the open section steel unit leaves the factory as a finished product, and one or more filling holes 3 can be set on each open section steel unit 2, or can be set on part of the open section steel unit 2 One or more filling holes 3 can be selected according to the actual deformation of the tunnel.
本发明还提供了一种开口型钢灌浆加固隧道的结构，包括：与盾构管片1待加固的内弧面对应的多个开口型钢单元2以及固定连接件4。The present invention also provides an open-shaped steel grouting reinforced tunnel structure, including: a plurality of open-shaped steel units 2 and fixed connectors 4 corresponding to the inner arc surface of the shield segment 1 to be reinforced.
开口型钢单元2，包括一型钢板以及由型钢板两侧朝同一方向翻折形成翻折边，将开口型钢单元2贴合盾构管片1待加固的内弧面上，使得开口型钢单元2的内部形成有中空的容置通道。多个所述开口型钢单元2固定串接，以连通形成中空的一圆弧管通道。沿隧道的延伸方向，可以根据隧道变形的实际情况，设置多个圆弧管通道。进一步地，在所述开口型钢单元和盾构管片接触处涂抹有粘结剂，本实施例中选用优质A级无溶剂型改性环氧树脂类粘钢灌注胶，从而可以防止后期在圆弧管通道中灌浆时，防止填充物5从开口型钢单元2和盾构管片1的间隙中溢出，影响加固质量。The open-shaped steel unit 2 includes a steel plate and a folded edge formed by turning both sides of the steel plate in the same direction, and the open-shaped steel unit 2 is attached to the inner arc surface of the shield segment 1 to be reinforced, so that the open-shaped steel unit 2 A hollow accommodating channel is formed inside. A plurality of said open-shaped steel units 2 are fixedly connected in series to form a hollow arc tube passage. Along the extension direction of the tunnel, multiple arc tube passages can be set according to the actual deformation of the tunnel. Further, an adhesive is applied to the contact between the open-shaped steel unit and the shield segment. In this embodiment, a high-quality A-grade solvent-free modified epoxy resin-based steel-bonding potting glue is selected, so as to prevent the round When grouting in the arc tube channel, the filler 5 is prevented from overflowing from the gap between the open-shaped steel unit 2 and the shield segment 1, which affects the reinforcement quality.
固定连接件4，所述固定连接件4为膨胀螺栓或化学螺栓，本实施例中选用膨胀螺栓，通过在开口型钢单元2上开设螺栓孔，使得膨胀螺栓经由螺栓孔将开口型钢单元2固定在盾构管片1待加固的内弧面上。进一步地，在开口型钢单元2上设置填充孔3，以供圆弧管通道内灌注入填充物5。所述填充物5可以为微膨胀水泥砂浆或者微膨胀混凝土。当然，在具体运用中填充孔3可以设置在开口型钢单元2两侧的翻折边上，也可以设置在钢板中部的任意位置，并不限于本实施例。通常填充孔3在开口型钢单元作为成品出厂时，就设置好了，可以在每一个开口型钢单元2上设置一个或多个填充孔3，也可以是开口型钢上的部分开口型钢单元2上设置一个或多个填充孔3，可根据隧道的实际变形情况做出选择。The fixed connector 4 is an expansion bolt or a chemical bolt. In this embodiment, the expansion bolt is selected. By setting up a bolt hole on the open-shaped steel unit 2, the expansion bolt fixes the open-shaped steel unit 2 on the open-shaped steel unit 2 through the bolt hole. The inner arc surface of the shield segment 1 to be reinforced. Further, a filling hole 3 is provided on the open-shaped steel unit 2 for pouring filler 5 into the arc tube channel. The filler 5 can be micro-expansion cement mortar or micro-expansion concrete. Of course, in specific applications, the filling holes 3 can be set on the folded edges on both sides of the open-shaped steel unit 2, or can be set at any position in the middle of the steel plate, and are not limited to this embodiment. Usually the filling hole 3 is set when the open section steel unit leaves the factory as a finished product, and one or more filling holes 3 can be set on each open section steel unit 2, or can be set on part of the open section steel unit 2 One or more filling holes 3 can be selected according to the actual deformation of the tunnel.
具体运用中，在待加固的内弧面上安装开口型钢单元2时，具有两种实施方式，其中，实施例1：先将多个开口型钢单元相互电焊连接形成开口型钢，然后通过固定连接件将所述开口型钢整体固定在盾构管片待加固的内弧面上。实施例2：通过固定连接件将各个所述开口型钢单元2排列固定在盾构管片待加固的内弧面上，同一圆弧管通道中的两个开口型钢单元2端部对齐并抵触连通，然后，电焊连接盾构管片待加固的内弧面上相邻的所述开口型钢单元2以形成开口型钢。In specific application, when installing the open-shaped steel unit 2 on the inner arc surface to be reinforced, there are two implementation modes, among them, embodiment 1: firstly connect a plurality of open-shaped steel units to each other by electric welding to form the open-shaped steel, and then fix the connecting piece The open-shaped steel is integrally fixed on the inner arc surface of the shield segment to be reinforced. Embodiment 2: Arranging and fixing each of the open-shaped steel units 2 on the inner arc surface of the shield segment to be reinforced by fixing the connectors, and the ends of the two open-shaped steel units 2 in the same arc tube channel are aligned and communicated in conflict , and then electric welding connects the adjacent open-shaped steel units 2 on the inner arc surface of the shield segment to be reinforced to form open-shaped steel.
现对本发明提供的一种开口型钢灌浆加固隧道的施工方法的具体操作细节进行详细说明。The specific operation details of the construction method of an open-shaped steel grouting reinforced tunnel provided by the present invention will now be described in detail.
首先对隧道变形情况进行测量，根据测量结果，得到加固面形状参数。根据隧道变形情况，设计多个开口型钢单元，将一根或一根以上的开口型钢单元进行加工，使开口型钢单元形状与加固面相吻合。如果需要一根以上的开口型钢单元，相邻的开口型钢单元之间焊接连接。所述开口型钢单元，加工时要预留一个或多个螺栓孔，安装膨胀螺栓4，以将开口型钢单元固定在隧道衬砌加固面上。为避免漏浆、增加开口型钢灌浆加固隧道的可靠性，在所述开口型钢单元和隧道衬砌管片接触处，涂抹粘结剂6，粘结剂6只在灌浆时起临时密封作用，所述粘结剂6可以为优质A级无溶剂型改性环氧树脂类粘钢灌注胶或硅胶。所述开口型钢上设有一个或多个注浆孔3，通过注浆孔灌注微膨胀浆体5，以增加加固构件的强度。浆体在开口型钢加固安装后进行灌注填充，运输方便，且开口型钢安装和灌浆单独进行，不影响地铁等正常运行。所述微膨胀浆体5可以为微膨胀水泥砂浆或者微膨胀混凝土。监测隧道变形及承载力变化，待隧道稳定，加固完成。Firstly, the tunnel deformation is measured, and the shape parameters of the reinforced surface are obtained according to the measurement results. According to the deformation of the tunnel, design multiple open-section steel units, and process one or more open-section steel units so that the shape of the open-section steel units matches the reinforcement surface. If more than one open-section steel unit is required, adjacent open-section steel units shall be connected by welding. For the open section steel unit, one or more bolt holes should be reserved during processing, and expansion bolts 4 should be installed to fix the open section steel unit on the reinforcement surface of the tunnel lining. In order to avoid grout leakage and increase the reliability of open-shaped steel grouting reinforced tunnels, adhesive 6 is applied to the contact between the open-shaped steel unit and the tunnel lining segment, and the adhesive 6 only acts as a temporary seal during grouting. Adhesive 6 can be high-quality Class A solvent-free modified epoxy resin-based steel bonding glue or silica gel. The open section steel is provided with one or more grouting holes 3 through which the micro-expansion slurry 5 is poured to increase the strength of the reinforcing member. The slurry is poured and filled after the reinforcement and installation of the open section steel, which is convenient for transportation, and the installation and grouting of the open section steel are carried out separately, which does not affect the normal operation of the subway. The micro-expansion slurry 5 can be micro-expansion cement mortar or micro-expansion concrete. Monitor tunnel deformation and bearing capacity changes, and wait until the tunnel is stable and the reinforcement is completed.
本发明提供了一种开口型钢灌浆加固隧道的施工方法，通过提供与盾构管片待加固的内弧面相吻合的多个开口型钢单元，多个所述开口型钢单元连通形成中空的一圆弧管通道，通过固定连接件将多个开口型钢单元固定早盾构管片待加固的内弧面上，在所述圆弧管通道内灌注填充物，从而填充物和开口型钢形成新的加固体联合原隧道结构体共同受力，解决了现有技术中易腐蚀、机械化依赖性高，粘结剂未充分固化，以及容易触电或短路的问题，且在对原隧道结构进行加固处理时具有加固效果好、成本低、工期短、随型性高等特点。The invention provides a construction method for tunnel reinforced by grouting with open-shaped steel. By providing a plurality of open-shaped steel units matching the inner arc surface of the shield segment to be reinforced, the plurality of open-shaped steel units are connected to form a hollow circular arc. Pipe channel, fix multiple open-shaped steel units on the inner arc surface of the shield segment to be reinforced through fixed connectors, pour fillers into the circular arc tube channel, so that the filler and open-shaped steel form a new reinforcement Combined with the original tunnel structure to bear the force, it solves the problems of easy corrosion, high mechanization dependence, insufficient curing of the adhesive, and easy electric shock or short circuit in the existing technology, and it has the effect of strengthening the original tunnel structure when it is reinforced. It has the characteristics of good effect, low cost, short construction period and high adaptability.
以上结合附图实施例对本发明进行了详细说明，本领域中普通技术人员可根据上述说明对本发明做出种种变化例。因而，实施例中的某些细节不应构成对本发明的限定，本发明将以所附权利要求书界定的范围作为保护范围。The present invention has been described in detail above with reference to the embodiments of the accompanying drawings, and those skilled in the art can make various changes to the present invention according to the above description. Therefore, some details in the embodiments should not be construed as limiting the present invention, and the scope of the present invention will be defined by the appended claims as the scope of protection.
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| CN108411806A (en) * | 2018-03-12 | 2018-08-17 | 华南理工大学 | A kind of structure and its installation method of reinforced steel concrete pipe culvert |
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| CN109723467B (en) * | 2019-01-11 | 2020-03-17 | 北京交通大学 | Underground excavation tunnel lining reinforcing device and reinforcing method |
| CN110295924B (en) * | 2019-05-24 | 2023-09-26 | 同济大学 | Shield tunnel reinforcing structure based on H-shaped steel plate and construction method |
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