CN115126003A - Post-cast strip pre-sealing structure and pre-sealing construction method - Google Patents

Post-cast strip pre-sealing structure and pre-sealing construction method Download PDF

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CN115126003A
CN115126003A CN202210754586.5A CN202210754586A CN115126003A CN 115126003 A CN115126003 A CN 115126003A CN 202210754586 A CN202210754586 A CN 202210754586A CN 115126003 A CN115126003 A CN 115126003A
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post
steel plate
cast strip
grouting
pipe
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CN115126003B (en
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陈云瑞
李帅
李海通
张志高
李培彦
程远兵
杨中正
魏国力
巴图
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North China University of Water Resources and Electric Power
China Construction Fifth Engineering Bureau Co Ltd
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China Construction Fifth Engineering Bureau Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/16Arrangement or construction of joints in foundation structures
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66Sealings
    • E04B1/68Sealings of joints, e.g. expansion joints
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66Sealings
    • E04B1/68Sealings of joints, e.g. expansion joints
    • E04B1/6801Fillings therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04Devices for both conveying and distributing

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  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
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  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
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Abstract

本发明公开了一种后浇带预封闭结构及预封闭施工方法,旨在解决现有后浇带预封闭技术过程繁琐且防水效果差的技术问题。后浇带预封闭结构包括八字型钢板、注浆管、隔断网、底模、排气管;后浇带预封闭施工方法,包括(1)支设底模,模穿设排气管,设置隔断网;(2)铺设非固化沥青层及橡胶带;(3)焊接多块八字型钢板(4)固定钢板,涂装密封胶、设置水泥砂浆保护层,(5)铺设防水卷材;(6)设置保护台;(7)建筑结构沉降符合要求后,通过注浆管注浆对后浇带进行封闭。本发明公开具有使用简单,操作方便,防水效果好,注浆密实的优点。

Figure 202210754586

The invention discloses a post-casting belt pre-sealing structure and a pre-sealing construction method, aiming at solving the technical problems of complicated process and poor waterproof effect of the existing post-casting belt pre-sealing technology. The pre-sealing structure of the post-casting belt includes a figure-eight steel plate, a grouting pipe, a partition net, a bottom mold, and an exhaust pipe; Partition net; (2) Laying non-cured asphalt layer and rubber belt; (3) Welding a plurality of figure-eight steel plates; (4) Fixing steel plates, applying sealant, setting a protective layer of cement mortar, (5) Laying waterproof membranes; ( 6) Set up a protection platform; (7) After the settlement of the building structure meets the requirements, seal the post-casting zone by grouting through the grouting pipe. The invention disclosed by the invention has the advantages of simple use, convenient operation, good waterproof effect and compact grouting.

Figure 202210754586

Description

后浇带预封闭结构及预封闭施工方法Post-casting belt pre-sealing structure and pre-sealing construction method

技术领域technical field

本发明涉及后浇带预封闭施工技术领域,具体涉及一种后浇带预封闭结构及预封闭施工方法。The invention relates to the technical field of post-casting zone pre-sealing construction, in particular to a post-cast zone pre-sealing structure and a pre-sealing construction method.

背景技术Background technique

后浇带是在建筑施工中为防止出现钢筋混凝土结构由于自身收缩不均或沉降不均可能产生的有害裂缝,按照设计或施工规范要求,在基础底板、墙、梁相应位置留设的混凝土带。The post-casting belt is a concrete belt reserved in the corresponding positions of the foundation floor, wall and beam according to the requirements of the design or construction specifications in order to prevent the occurrence of harmful cracks in the reinforced concrete structure due to its uneven shrinkage or uneven settlement. .

在实际的工程施工中,一方面,为了尽快施工室外管网、室外回填土、室外景观等,以缩短或追赶耽误的工期,需要提前封闭后浇带;另一方面,后浇带的存在也会对施工产生很多不利的影响,比如,后浇带两侧梁板构件为悬挑状态,须长时间设置支撑;后浇带内钢筋长期裸露,容易锈蚀等。为了解决这些矛盾和问题,缩短工期,节约建筑投资,并为施工创造良好条件,需要预先封闭后浇带,待建筑物沉降达到相应要求后,再注浆浇筑后浇带。其中,现有技术常常采用预制混凝土盖板对后浇带支护进行预封闭。In actual engineering construction, on the one hand, in order to construct outdoor pipe network, outdoor backfill, outdoor landscape, etc. as soon as possible to shorten or catch up with the delayed construction period, it is necessary to close the post-pouring belt in advance; on the other hand, the existence of the post-pouring belt also It will have many adverse effects on the construction. For example, the beam and plate members on both sides of the post-casting belt are in a cantilever state, and supports must be provided for a long time; the steel bars in the post-casting belt are exposed for a long time, which is easy to corrode. In order to solve these contradictions and problems, shorten the construction period, save construction investment, and create good conditions for construction, it is necessary to seal the post-pouring zone in advance. Among them, in the prior art, precast concrete cover plates are often used to pre-enclose the post-cast belt support.

公开于该背景技术部分的信息仅用于加深对本公开的背景技术的理解,而不应当被视为承认或以任何形式暗示该信息构成本领域技术人员所公知的现有技术。The information disclosed in this Background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

发明内容SUMMARY OF THE INVENTION

发明人在实现现有预制混凝土盖板对后浇带进行预封闭的技术方案时发现:该技术方案需要根据后浇带宽度和其上部覆土厚度设计不同的配筋方案,操作复杂,制作繁琐,且防水效果无法得到保证。When realizing the technical solution of pre-sealing the post-casting zone with the existing precast concrete cover plate, the inventor found that the technical solution needs to design different reinforcement schemes according to the width of the post-casting zone and the thickness of the upper covering soil, and the operation is complicated and the production is cumbersome. And the waterproof effect cannot be guaranteed.

鉴于以上技术问题中的至少一项,本公开提供了一种后浇带预封闭结构,包括中心设有通孔的八字型钢板、与所述八字型钢板中心通孔对应设置的注浆管、用于垂直设置在预封闭的两侧基体间的隔断网、设置在预封闭的两侧基体间的底模、穿设于所述底模的排气管。In view of at least one of the above technical problems, the present disclosure provides a post-casting belt pre-sealing structure, including a figure-eight steel plate with a through hole in the center, a grouting pipe corresponding to the central through hole of the figure-eight steel plate, It is used for the partition net vertically arranged between the two sides of the pre-enclosed base, the bottom mold arranged between the two pre-enclosed bases, and the exhaust pipe passing through the bottom mold.

在本公开的一些实施例中,所述八字型钢板两侧设有用于螺栓固定的固定檐。In some embodiments of the present disclosure, two sides of the figure-eight steel plate are provided with fixing eaves for bolt fixing.

在本公开的一些实施例中,所述钢板与所述注浆管的连接部处设有方柱状或圆柱状保护台。In some embodiments of the present disclosure, a square-column or cylindrical protection table is provided at the connection portion of the steel plate and the grouting pipe.

在本公开的一些实施例中,所述保护台为混凝土材质。In some embodiments of the present disclosure, the protection table is made of concrete.

在本公开的一些实施例中,所述隔断网采用双层钢丝网。In some embodiments of the present disclosure, the partition mesh adopts a double-layer steel mesh.

在本公开的一些实施例中,所述排气管一端伸出底模50-70mm,另一端为尖头与钢板相抵的尖嘴或为与钢板相抵的三通管。In some embodiments of the present disclosure, one end of the exhaust pipe protrudes out of the bottom mold by 50-70 mm, and the other end is a tip with a pointed end abutting against the steel plate or a tee pipe with a pointed end abutting against the steel plate.

根据本公开的一个方面,提供一种基于上述后浇带预封闭结构的后浇带预封闭施工方法,包括如下步骤:According to one aspect of the present disclosure, there is provided a post-casting zone pre-sealing construction method based on the above-mentioned post-cast zone pre-sealing structure, comprising the following steps:

(1)预封闭基体间支设底模,并在底模穿设排气管,垂直于预封闭两侧基体设置隔断网;(1) A bottom mold is supported between the pre-closed bases, and an exhaust pipe is passed through the bottom mold, and a partition net is set perpendicular to the bases on both sides of the pre-closed;

(2)在八字型钢板与预封闭基体的接触范围内铺设非固化沥青层,并在非固化沥青层上方铺设橡胶带;(2) Lay a non-cured asphalt layer within the contact range between the figure-eight steel plate and the pre-sealed substrate, and lay a rubber belt above the non-cured asphalt layer;

(3)饱满焊接多块八字型钢板间的拼接缝,并打磨平整;(3) Weld the splicing seams between multiple splayed steel plates fully, and polish them flat;

(4)用螺栓穿过八字型钢板的固定檐,固定钢板于预封闭基体上,并在钢板与预封闭基体接缝部涂装密封胶、设置水泥砂浆保护层,调整排气管使其尖端抵住钢板表面;(4) Use bolts to pass through the fixed eaves of the figure-eight steel plate, fix the steel plate on the pre-sealed base, apply sealant on the joint between the steel plate and the pre-sealed base, set a protective layer of cement mortar, and adjust the exhaust pipe to make its tip against the surface of the steel plate;

(5)在八字型钢板范围内铺设防水卷材,并一定程度的向两侧延伸铺设;(5) Lay the waterproof membrane within the range of the figure-eight steel plate, and extend it to both sides to a certain extent;

(6)浇筑钢板与注浆管连接部位置处的保护台;(6) The protection table at the position of the connection between the pouring steel plate and the grouting pipe;

(7)建筑结构沉降符合要求后,通过注浆管注浆对后浇带进行封闭。(7) After the settlement of the building structure meets the requirements, the post-casting zone shall be closed by grouting through the grouting pipe.

在本公开的一些实施例中,在所述步骤(1)中,所述隔断网焊接于预封闭基体预留的钢筋。In some embodiments of the present disclosure, in the step (1), the partition net is welded to the steel bars reserved in the pre-enclosed base.

在本公开的一些实施例中,在所述步骤(5)中,所述防水卷材沿注浆管向上铺设一定距离。In some embodiments of the present disclosure, in the step (5), the waterproofing membrane is laid upward along the grouting pipe for a certain distance.

在本公开的一些实施例中,在所述步骤(7)中,注浆前先注入一定量的水进行湿润。In some embodiments of the present disclosure, in the step (7), a certain amount of water is injected for wetting before grouting.

本申请实施例中提供的一个或多个技术方案,至少具有如下任一技术效果或优点:One or more technical solutions provided in the embodiments of this application have at least any of the following technical effects or advantages:

1. 由于采用了钢板进行预封闭,所以,有效解决了预制混凝土盖板进行预封闭时繁琐的备料步骤,进而实现了预封闭装置的便利性。1. Since the steel plate is used for pre-sealing, it effectively solves the tedious material preparation steps when pre-sealing the precast concrete cover, thereby realizing the convenience of the pre-sealing device.

2.由于采用了八字型的钢板,使得注浆面高于预封闭两侧基体面,保证了浇筑的密实可靠性,且浇筑成型的后浇带部位亦为八字型,能有效防止后浇带部位积水,极大降低渗漏风险。2. Due to the use of a figure-eight steel plate, the grouting surface is higher than the base surface on both sides of the pre-sealing, which ensures the compactness and reliability of the pouring, and the post-pouring belt part of the pouring molding is also a figure-eight shape, which can effectively prevent the post-pouring belt. Water accumulation at the site greatly reduces the risk of leakage.

3.由于在钢板下铺设有橡胶带,故此连接部为柔性连接,具有一定的伸缩性,可有效降低因后浇带部位不均匀沉降所引起的防水卷材拉裂,进而避免了建筑沉降对防水效果的影响,同时亦可起到防水层的作用。3. Since the rubber belt is laid under the steel plate, the connection part is a flexible connection and has a certain degree of elasticity, which can effectively reduce the tearing of the waterproof membrane caused by the uneven settlement of the post-cast belt part, thereby avoiding the impact of building settlement. The effect of waterproof effect, but also can play the role of waterproof layer.

附图说明Description of drawings

图1为本申请一实施例中后浇带预封闭结构使用示意图。FIG. 1 is a schematic diagram of the use of a post-casting belt pre-sealing structure in an embodiment of the present application.

图2为本申请一实施例中八字型钢板结构示意图。FIG. 2 is a schematic structural diagram of a figure-eight steel plate in an embodiment of the application.

图3为本申请另一实施例中八字型钢板结构示意图。FIG. 3 is a schematic structural diagram of a figure-eight steel plate in another embodiment of the present application.

图4为本申请一实施例中八字型钢板与注浆管连接结构示意图。FIG. 4 is a schematic diagram of the connection structure of the figure-eight steel plate and the grouting pipe according to an embodiment of the application.

图5为本申请一实施例中排气管示意图。FIG. 5 is a schematic diagram of an exhaust pipe in an embodiment of the application.

图6为本申请另一实施例中排气管示意图。FIG. 6 is a schematic diagram of an exhaust pipe in another embodiment of the present application.

图7为图1中A的局部放大图。FIG. 7 is a partial enlarged view of A in FIG. 1 .

图8为本申请一实施例中后浇带预封闭结构安装俯视示意图。FIG. 8 is a schematic top view of the installation of the post-casting belt pre-enclosed structure in an embodiment of the present application.

以上各图中,1为后浇带两侧基体,2为八字型钢板,3为注浆管,4为保护台,5为膨胀螺栓,6为隔断网,7为排气管,8为底模,9为防水卷材,10为非固化沥青层,11为橡胶带,12为水泥砂浆层。In the above figures, 1 is the base on both sides of the post-casting belt, 2 is the figure-eight steel plate, 3 is the grouting pipe, 4 is the protection table, 5 is the expansion bolt, 6 is the partition net, 7 is the exhaust pipe, and 8 is the bottom Mold, 9 is a waterproof membrane, 10 is a non-cured asphalt layer, 11 is a rubber belt, and 12 is a cement mortar layer.

具体实施方式Detailed ways

在本申请的描述中,需要理解的是,术语“上”、“下”、“前”、“后”、“左”、“右”、“顶”、“底”、“内”、“外”、“竖直”、“水平”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。而本申请所涉及“连接”、“联接”,如无特别说明,均包括直接和间接连接(联接)。In the description of this application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside", "vertical", "horizontal", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description , rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation on the present application. The "connection" and "connection" referred to in this application, unless otherwise specified, include both direct and indirect connections (connections).

以下实施例中所涉及的构件、材料等,如无特别说明,则均为常规市售产品。The components, materials, etc. involved in the following embodiments are conventional commercial products unless otherwise specified.

为了更好的理解本申请技术方案,下面将结合说明书附图以及具体的实施方式对上述技术方案进行详细的说明。In order to better understand the technical solutions of the present application, the above-mentioned technical solutions will be described in detail below with reference to the accompanying drawings and specific embodiments.

本例公开一种后浇带预封闭结构,参见图1,包括中心设有通孔的八字型钢板、与所述八字型钢板中心通孔对应设置的注浆管、用于垂直设置在预封闭的两侧基体间的隔断网、设置在预封闭的两侧基体间的底模,穿设于所述底模的排气管。This example discloses a post-casting belt pre-sealing structure, referring to FIG. 1 , including a figure-eight steel plate with a through hole in the center, a grouting pipe corresponding to the central through hole of the figure-eight-shaped steel plate, which is used for vertical installation in the pre-sealing The partition net between the two sides of the base body, the bottom mold arranged between the pre-closed two sides of the base body, and the exhaust pipe of the bottom mold pass through.

八字形钢板主要用于后浇带上部的封闭,参见图2,其上表面为平面,两侧弯折呈斜坡状,斜坡状底边设一用于固定的边檐,上表面中心开设一用于连接注浆管的通孔。该八字型钢板的尺寸根据实际工程中后浇带的宽度进行选取。本实施例中,后浇带的宽度为800mm,考虑到两端固定檐需要落在预封闭的基体上,且留设一定冗余量,故选取八字型钢板的宽度为1200mm,并选取八字形钢板的长度为2000mm,厚度为8mm。在其他的一些实施例中,参见图3,固定檐为L型。The figure-eight steel plate is mainly used for sealing the upper part of the post-casting belt, see Figure 2, the upper surface is flat, the two sides are bent in a slope shape, the bottom edge of the slope shape is provided with an edge for fixing, and the center of the upper surface is opened for a purpose Through holes for connecting grouting pipes. The size of the eight-shaped steel plate is selected according to the width of the post-casting strip in the actual project. In this embodiment, the width of the post-casting belt is 800mm. Considering that the fixed eaves at both ends need to fall on the pre-sealed base body, and a certain amount of redundancy is reserved, the width of the figure-eight steel plate is selected to be 1200mm, and the figure-eight-shaped steel plate is selected to be 1200mm wide. The length of the steel plate is 2000mm and the thickness is 8mm. In some other embodiments, referring to FIG. 3 , the fixed eaves are L-shaped.

注浆管用于建筑沉降符合要求后浆液的灌注。注浆管的长度根据设计填土的厚度确定,参见图4,并垂直于八字型钢板设置。本实施中设计填土的厚度为1700mm,故注浆管高度选取为1700mm,并考虑一定的硬度,注浆管选用壁厚5mm的DN150铸铁管,在其他的一些实施例中选用钢管作为注浆管。The grouting pipe is used to pour the grout after the building settlement meets the requirements. The length of the grouting pipe is determined according to the thickness of the designed filling, see Figure 4, and is set perpendicular to the figure-eight steel plate. In this implementation, the thickness of the designed filling is 1700mm, so the height of the grouting pipe is selected as 1700mm, and considering a certain hardness, the grouting pipe is made of DN150 cast iron pipe with a wall thickness of 5mm, and in some other embodiments, steel pipe is selected as the grouting Tube.

隔断网主要用于浇筑后浇带时控制混凝土浆液的流向,混凝土浆液遇到隔断网后,由于隔断网的阻隔作用,混凝土浆液会朝反方向流动,由此保证隔断网间区域段内混凝土浆液的密实程度。本实施例中隔断网选用双层钢丝网,在后浇带内每隔6米设置一个,在其他的一些实施例中,可以根据混凝土的流动性选取相应合适的间隔距离。The partition net is mainly used to control the flow direction of the concrete slurry when the belt is poured after pouring. After the concrete slurry encounters the partition net, due to the blocking effect of the partition net, the concrete slurry will flow in the opposite direction, thus ensuring the concrete slurry in the area between the partition nets. degree of compactness. In this embodiment, a double-layer steel wire mesh is used for the partition net, and one is set every 6 meters in the post-casting belt. In other embodiments, a corresponding appropriate spacing distance can be selected according to the fluidity of the concrete.

底模的对后浇带的底部起到封闭和支撑作用。通过支撑柱支撑设置底模,达到对后浇带底部空间的封闭,便于后期后浇带内混凝土注浆,底模宽度要超出后浇带宽度,并与建筑基体紧密固定,防止后期注浆时浆液发生渗漏。本实施例中,选用木板底模,在其他的一些实施例中选用钢板底模。The bottom mold of the bottom mold plays a role of sealing and supporting the bottom of the post-casting belt. The bottom form is supported by the support column to seal the bottom space of the post-casting zone, which is convenient for concrete grouting in the post-casting zone. Slurry leaks. In this embodiment, a wooden bottom mold is selected, and in other embodiments, a steel plate bottom mold is selected.

排气管用于注浆时后浇带内空气的排出,防止混凝土内部产生空腔,影响后浇带的浇筑质量,同时,用于判断两预封闭装置连接处混凝土注浆是否密实,兼用作溢浆管。本实施例中选用PVC材质的排气管,直径为25mm。排气管的长度需要根据后浇带的厚度确定,保证排气管的一端与预封闭装置的八字型钢板内壁相抵,另一端超出后浇带底模50-70mm,此外,参见图5,排气管与八字型钢板内壁相抵的一端切削为尖嘴状,避免钢板封闭排气管口,进而无法达到排气和判断注浆程度的效果。当浆液注入时,后浇带底部逐渐累计浆液,后浇带内空气被排挤至后浇带封闭空间上部,通过与钢板相抵的排气管尖嘴进入排气管,并于底模下部排气管口排出。当后浇带内浆液注满后,多余的浆液会从排气管中流出,兼用作溢浆管,防止浆液压力破坏预封闭装置,同时用于判断注浆是否停止。在其他的一些实施例中,参见图6,位于后浇带内的排气管头部为与钢板相抵的三通管。The exhaust pipe is used to discharge the air in the post-casting belt during grouting, to prevent the cavity from being formed inside the concrete and affect the pouring quality of the post-casting belt. Slurry tube. In this embodiment, an exhaust pipe made of PVC material is selected, with a diameter of 25 mm. The length of the exhaust pipe needs to be determined according to the thickness of the post-casting belt to ensure that one end of the exhaust pipe is in contact with the inner wall of the splayed steel plate of the pre-sealing device, and the other end exceeds the bottom mold of the post-casting belt by 50-70mm. The end of the trachea that touches the inner wall of the figure-eight steel plate is cut into a sharp beak shape, so as to avoid the steel plate from closing the exhaust pipe opening, thereby failing to achieve the effect of exhausting and judging the degree of grouting. When the slurry is injected, the slurry is gradually accumulated at the bottom of the post-casting belt, and the air in the post-casting belt is expelled to the upper part of the closed space of the post-casting belt. Nozzle discharge. When the slurry in the post-casting belt is full, the excess slurry will flow out from the exhaust pipe, which is also used as a slurry overflow pipe to prevent the slurry pressure from damaging the pre-sealing device, and at the same time, it is used to judge whether the grouting is stopped. In some other embodiments, referring to FIG. 6 , the head of the exhaust pipe located in the post-casting zone is a three-way pipe which is opposed to the steel plate.

本例还公开一种基于上述后浇带预封闭结构的后浇带预封闭施工方法,包括如下步骤:This example also discloses a post-casting zone pre-sealing construction method based on the above-mentioned post-cast zone pre-sealing structure, comprising the following steps:

(1)预封闭基体间支设底模,并在底模穿设排气管,垂直于预封闭两侧基体设置隔断网。(1) A bottom mold is supported between the pre-sealed bases, and an exhaust pipe is passed through the bottom mold, and a partition net is set perpendicular to the bases on both sides of the pre-sealed.

首先,在预封闭基体间的底部支撑设置底模,以便用于后期后浇带的浇筑成型,底模支设完成后按照所使用的后浇带预封闭结构的八字型钢板的长度,以此长度为间隔在底模相应位置处设置排气管,使排气管的尖嘴位于两块八字型钢板的连接部位,即两相邻注浆管的中心部位,并与钢板表面相抵,由此方便判断两注浆管间的混凝土浆液是否浇筑密实。First, a bottom mold is set at the bottom support between the pre-closed substrates, so as to be used for the pouring and forming of the post-cast belt in the later stage. The length of the exhaust pipe is set at the corresponding position of the bottom mold, so that the tip of the exhaust pipe is located at the connection part of the two eight-shaped steel plates, that is, the center part of the two adjacent grouting pipes, and is in contact with the surface of the steel plate. It is convenient to judge whether the concrete slurry between the two grouting pipes is poured densely.

隔断网垂直于后浇带两侧基体设置,本例中隔断网选用了双层钢丝网,通过与后浇带两侧面裸露出的预留钢筋焊接,实现隔断网的设置,其中,隔断网在后浇带内每隔6m设置一个,且需要根据实际位置进行适当调整,以确保隔断网不处于注浆管附近,避免影响注浆。通过隔断网的设置,能有效控制后期沉降达标后的注浆混凝土浆液的流动方向,当混凝土浆液流动至隔断网处时,由于钢丝网的阻碍,导致浆液回流,由此保证隔断网间区域段内浆液量,进而确保了该区域段内浆液的注浆饱满程度。The partition mesh is set perpendicular to the base on both sides of the post-casting belt. In this example, the partition mesh is made of double-layer steel wire mesh, which is welded with the reserved steel bars exposed on both sides of the post-casting strip to realize the setting of the partition mesh. One is set every 6m in the post-casting belt, and it needs to be adjusted according to the actual position to ensure that the partition net is not near the grouting pipe to avoid affecting the grouting. The setting of the partition net can effectively control the flow direction of the grouting concrete slurry after the later settlement reaches the standard. When the concrete slurry flows to the partition net, due to the obstruction of the steel wire mesh, the slurry will flow back, thus ensuring the area between the partition nets. The amount of internal grout thus ensures the fullness of the grout in this area.

(2)在八字型钢板与预封闭基体的接触范围内铺设非固化沥青层,并在非固化沥青层上方铺设橡胶带。(2) Lay a non-cured asphalt layer within the contact range between the figure-eight steel plate and the pre-sealed substrate, and lay a rubber belt above the non-cured asphalt layer.

清理后浇带两侧基体靠近后浇带的表面后,涂装非固化沥青防水层,其中,非固化橡胶沥青防水涂料是一种在其使用年限内能一直保持粘性膏状体的防水涂料,该涂料能封闭基层裂缝和毛细孔,自愈能力强、碰触即粘、难以剥离,它能解决因基层开裂应力传递给防水层造成的防水层断裂、挠曲疲劳或处于高应力状态下的提前老化等问题;同时,蠕变性材料的黏滞性使其能够很好地封闭基层的毛细孔和裂缝,解决了防水层的窜水难题,使防水可靠性得到大幅度提高。鉴于非固化沥青防水层的种种优势,一方面,其能起到粘结后续工序中橡胶带的作用,另一方面,用于连接处的防水以及通过其抗疲劳恢复能力改善后浇带沉降给后浇带封闭密实程度所带来的影响。本例中涂装宽100mm、厚2mm的非固化沥青层。After cleaning, the substrate on both sides of the post-casting belt is close to the surface of the post-casting belt, and then a non-cured asphalt waterproof layer is applied. Among them, the non-cured rubber asphalt waterproof coating is a waterproof coating that can maintain a sticky paste during its service life. The coating can close the cracks and capillary pores of the base layer, has strong self-healing ability, sticks to the touch, and is difficult to peel off. At the same time, the viscosity of the creep material enables it to well seal the pores and cracks of the base layer, solve the problem of water channeling of the waterproof layer, and greatly improve the waterproof reliability. In view of the various advantages of the non-cured asphalt waterproof layer, on the one hand, it can play the role of bonding the rubber belt in the subsequent process; The influence of the closed compaction degree of the post-cast belt. In this example, a layer of uncured asphalt with a width of 100mm and a thickness of 2mm is applied.

非固化沥青层铺装完毕后,利用该非固化沥青层的粘粘性,铺贴厚度10mm的与非固化沥青层同宽的橡胶带,主要利用橡胶带所具有的弹性,来缓解后浇带不均匀沉降所带来的后浇带封闭问题,保证在一定范围内的沉降,可以通过橡胶带的弹性形变消化,仍然保持后浇带的密封以及良好的防水效果。After the uncured asphalt layer is paved, use the stickiness of the uncured asphalt layer to lay a rubber tape with a thickness of 10mm and the same width as the uncured asphalt layer. The sealing problem of the post-casting belt caused by the uniform settlement ensures that the settlement within a certain range can be digested by the elastic deformation of the rubber belt, and the sealing of the post-casting belt and the good waterproof effect are still maintained.

(3)饱满焊接多块八字型钢板间的拼接缝,并打磨平整。(3) Weld the splicing seams between multiple figure-eight steel plates fully, and polish them flat.

八字型钢板装设前,首先需要对八字型钢板间的缝隙进行焊接,保证钢板间的紧密连接以及后续浇筑成型的后浇带能连为整体;此外,为了方便后续防水卷材的铺装以及后浇带浇筑成型后的平整性,需要确保缝隙处的平整度,因此,在八字型钢板的接缝处焊接完成后,需要对焊缝进行打磨平整。Before the figure-eight steel plate is installed, it is first necessary to weld the gaps between the figure-eight steel plates to ensure the tight connection between the steel plates and the subsequent pouring and forming of the post-cast belt as a whole; The flatness of the post-casting belt after pouring and molding needs to ensure the flatness of the gap. Therefore, after the welding of the joint of the figure-eight steel plate is completed, the welding seam needs to be ground and leveled.

(4)参见图7,用螺栓穿过八字型钢板的固定檐,固定钢板于预封闭基体上,并在钢板与预封闭基体接缝部涂装密封胶、设置水泥砂浆保护层,调整排气管使其尖端抵住钢板表面。(4) Referring to Figure 7, use bolts to pass through the fixed eaves of the figure-eight steel plate, fix the steel plate on the pre-sealed base, apply sealant on the joint between the steel plate and the pre-sealed base, set up a protective layer of cement mortar, and adjust the exhaust. The tube has its tip against the surface of the steel plate.

参见图8,将焊接完成的八字型钢板固定檐置于铺设完成的橡胶带上,为了确保固定的牢固性,采用膨胀螺栓依次穿过钢板、橡胶带、非固化沥青层,固定至后浇带两侧基体上,其中,同侧的膨胀螺栓间的最大间距不超过1米。Referring to Figure 8, the welded splayed steel plate fixing eaves are placed on the laid rubber belt. In order to ensure the firmness of the fixation, expansion bolts are used to pass through the steel plate, the rubber belt and the uncured asphalt layer in turn, and then fix it to the post-cast belt. On the bases on both sides, the maximum distance between the expansion bolts on the same side shall not exceed 1 meter.

在钢板与预封闭基体交接位置以及八字型钢板间的接缝焊接处涂装防水密封胶,防止雨水通过交接位置处深入后浇带,进一步保证防水性。此外,由于八字型钢板与后浇带两侧基体间的交接位置处的水体渗漏风险极大,故出于防水效果的考量,在二者的交接位置处砌筑水泥砂浆保护层。本实施例中,该水泥砂浆保护层宽300mm。Waterproof sealant is applied at the junction position of the steel plate and the pre-sealed base and the seam welding between the figure-eight steel plates to prevent rainwater from penetrating into the post-pouring belt through the junction position to further ensure waterproofness. In addition, due to the great risk of water leakage at the junction between the figure-eight steel plate and the base on both sides of the post-cast belt, a cement mortar protective layer was built at the junction for the sake of waterproofing effect. In this embodiment, the width of the cement mortar protective layer is 300mm.

八字型钢板固定完成后,进一步调整穿设于底模上的排气管,使得排气管的尖嘴尖头与钢板表面相抵。After the figure-eight steel plate is fixed, further adjust the exhaust pipe pierced on the bottom mold so that the tip of the exhaust pipe is in contact with the surface of the steel plate.

(5)在八字型钢板范围内铺设防水卷材,并一定程度的向两侧延伸铺设。(5) Lay the waterproof membrane within the range of the figure-eight steel plate, and extend it to both sides to a certain extent.

为了进一步保证后浇带的防渗水效果,在八字型钢板范围内铺装防水卷材,其中,该防水卷材向八字型钢板两侧边缘的外侧扩展铺设1000mm,并沿注浆管向上铺设200mm,更为有效的提升防水效果。铺设完成后,进行闭水试验,验证防水卷材的防水效果。In order to further ensure the anti-seepage effect of the post-casting belt, a waterproofing membrane is laid within the range of the figure-eight steel plate, wherein the waterproofing membrane extends 1000mm to the outside of the two sides of the figure-eight steel plate, and is laid up along the grouting pipe. 200mm, more effective to improve the waterproof effect. After the laying is completed, a closed water test is carried out to verify the waterproof effect of the waterproof membrane.

(6)浇筑钢板与注浆管连接部位置处的保护台。(6) The protection table at the position of the connection between the pouring steel plate and the grouting pipe.

为了更好的保护注浆管与八字型钢板的连接部位,在此连接部位浇筑保护台。在本实施例中,浇筑的是宽度为500mm,厚度为200mm的方形混凝土材质保护台,在其他的一些实施例中,浇筑直径为500mm,厚度为200mm的圆柱形保护台。In order to better protect the connection part between the grouting pipe and the figure-eight steel plate, a protection table is poured at this connection part. In this embodiment, a square concrete protection table with a width of 500 mm and a thickness of 200 mm is poured. In other embodiments, a cylindrical protection table with a diameter of 500 mm and a thickness of 200 mm is poured.

(7)建筑结构沉降符合要求后,通过注浆管注浆对后浇带进行封闭。(7) After the settlement of the building structure meets the requirements, the post-casting zone shall be closed by grouting through the grouting pipe.

后浇带预封闭结构装设完毕后,即可回填土方,进行后续工程施工,其中,需要对注浆管管口进行封堵,防止后续施工中进入杂物和水体,影响后浇带浇筑。当建筑沉降符合相应标准后,即可通过注浆管注入相应规格的混凝土浆液,在浇筑前,需要先通过注浆口注入一定量的水,以湿润注浆管内壁、后浇带两侧基体及底模,防止注入的混凝土浆液因失水影响其流动性,进而堵塞注浆管和后浇带。After the pre-sealing structure of the post-casting belt is installed, the earthwork can be backfilled and the subsequent engineering construction is carried out. Among them, the nozzle of the grouting pipe needs to be blocked to prevent the sundries and water bodies from entering in the subsequent construction, which will affect the pouring of the post-casting belt. When the building settlement meets the corresponding standards, concrete grout of corresponding specifications can be injected through the grouting pipe. Before pouring, a certain amount of water needs to be injected through the grouting port to wet the inner wall of the grouting pipe and the substrate on both sides of the post-pouring belt. And the bottom mold to prevent the injected concrete slurry from affecting its fluidity due to water loss, thereby blocking the grouting pipe and the post-pouring belt.

在其他的一些实施例中,相应调整了预封闭施工顺序,八字型钢板固定完后并做好防水后,再进行隔断网、底模及排气管的设置。In some other embodiments, the pre-sealing construction sequence is adjusted accordingly, and after the figure-eight steel plate is fixed and waterproofed, the partition net, the bottom mold and the exhaust pipe are set.

尽管已描述了本发明的一些优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例做出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。Although some preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may be made by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本实发明也意图包含这些改动和变型在内。It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present application and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. The utility model provides a post-cast strip is enclosed structure in advance which characterized in that, including the center be equipped with the splayed steel sheet of through-hole, with splayed steel sheet center through-hole corresponds the slip casting pipe that sets up, is used for setting up the wall net between the both sides base member of pre-closure perpendicularly, sets up die block, the wearing to locate between the both sides base member of pre-closure the blast pipe of die block.
2. The post-cast strip pre-closing structure according to claim 1, wherein fixing eaves for bolt fixing are arranged on two sides of the splayed steel plate.
3. The post-cast strip pre-closing structure according to claim 1, wherein a square column-shaped or cylindrical protection platform is arranged at a connecting part of the steel plate and the grouting pipe.
4. The post-cast strip pre-sealing structure as claimed in claim 1, wherein the protection platform is made of concrete.
5. The post-cast strip pre-sealing structure according to claim 1, wherein the partition net is a double-layer steel wire mesh.
6. The post-cast strip pre-sealing structure as claimed in claim 1, wherein one end of the exhaust pipe extends 50-70mm from the bottom die, and the other end is a tip with a tip abutting against the steel plate or a three-way pipe abutting against the steel plate.
7. A post-cast strip pre-closing construction method is implemented based on the post-cast strip pre-closing structure of claim 1, and comprises the following steps:
(1) a bottom die is supported between the pre-closed matrixes, an exhaust pipe penetrates through the bottom die, and a partition net is arranged on the matrixes vertical to the two sides of the pre-closed matrixes;
(2) paving a non-cured asphalt layer in the contact range of the splayed steel plate and the pre-closed matrix, and paving a rubber belt above the non-cured asphalt layer;
(3) fully welding the splicing seams among the splayed steel plates, and polishing and flattening;
(4) penetrating a fixing eave of the splayed steel plate by using a bolt, fixing the steel plate on the pre-closed base body, coating a sealant at the joint of the steel plate and the pre-closed base body, arranging a cement mortar protective layer, and adjusting the exhaust pipe to enable the tip of the exhaust pipe to abut against the surface of the steel plate;
(5) laying waterproof coiled materials in the range of the splayed steel plate, and extending and laying the waterproof coiled materials to two sides to a certain extent;
(6) pouring a protective table at the position of the connecting part of the steel plate and the grouting pipe;
(7) and after the settlement of the building structure meets the requirements, sealing the post-cast strip through grouting of the grouting pipe.
8. The post-cast strip pre-closure construction method according to claim 7, wherein in the step (1), the partition net is welded to a reinforcement bar reserved in a pre-closure matrix.
9. The post-cast strip pre-closing construction method as claimed in claim 7, wherein in the step (5), the waterproof roll is laid up a certain distance along the grout pipe.
10. The post-cast strip pre-closing construction method as claimed in claim 7, wherein a certain amount of water is injected for wetting before grouting in the step (7).
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