Installation structure of embedded waterstop in plain concrete section

Abstract

The utility model relates to tunnel construction technical field provides a kind of embedded waterstop installation structure in plain concrete section, comprising: formwork system, with the initial support to form two lining to be poured area;Formwork system includes the head board of being located at two lining to be poured area side, head board is equipped with along the length direction of two lining to be poured area through-hole;Waterstop, along the length direction of two lining to be poured area is laid;Waterstop includes the first side and second side along width direction, first side is inserted into two lining to be poured area by through-hole;Positioning mechanism is set in two lining to be poured area, suitable for first side clamping and fixed on head board.Such setting, can effectively solve the problem that waterstop is easily impacted by concrete and produces deviation, and waterstop local deformation, tear, fracture, be lead wire or steel wire puncture and other problems, to ensure that the structural integrity and the accuracy of position of waterstop in fixed and concrete pouring process, to improve waterstop effect.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to an installation structure for an embedded waterstop in a plain concrete section. Background Technology

[0002] With rapid urbanization and continuous improvement of transportation infrastructure, tunnel engineering has become an indispensable link in modern transportation networks, playing a crucial hub role in urban planning. During tunnel construction, structural joints, such as construction joints or expansion joints, need to be reserved at specific locations to adapt to geological conditions, construction techniques, or structural deformation requirements. However, these structural joints are often weak points in the tunnel's waterproofing system, easily becoming channels for groundwater seepage. Therefore, effectively solving the waterproofing problem at structural joints has become a core issue in ensuring the structural safety and long-term stable operation of tunnels.

[0003] Embedded waterstops, as a key waterproofing component in tunnel concrete structures, form a continuous sealing barrier by being pre-embedded in the concrete on both sides of structural joints to block water seepage. During concrete pouring, the embedded waterstops need to be fixed. Traditionally, methods such as angle steel fixing frames, galvanized lead wire, or steel wire binding are used to fix the waterstops.

[0004] However, the methods described above mostly target the portion of the waterstop located outside the pouring area. During concrete pouring, the portion of the waterstop located inside the pouring area will experience significant concrete impact, potentially causing it to shift. Furthermore, under the impact of concrete, the binding and fixing points of the waterstop are prone to uneven stress, which may lead to localized deformation, tearing, breakage, or puncture by steel / lead wires. This makes it difficult to guarantee the structural integrity and positional accuracy of the waterstop, thus affecting its waterproofing effect.

[0005] Therefore, ensuring the structural integrity and accurate positioning of the waterstop to guarantee its water-stopping effect has become an important issue that urgently needs to be addressed. Utility Model Content

[0006] This utility model provides an embedded waterstop installation structure in plain concrete sections to solve the defects of existing technologies where waterstops are easily misaligned or damaged during fixing and concrete pouring, affecting the waterstop effect. It can ensure the structural integrity and positional accuracy of the waterstop, thereby ensuring the waterstop effect.

[0007] This utility model provides an installation structure for an embedded waterstop strip in a plain concrete section, comprising: The formwork system, together with the initial support, forms a secondary lining waiting area; the formwork system includes a head plate located on one side of the secondary lining waiting area, and the head plate is provided with through holes along the length direction of the secondary lining waiting area; A waterstop strip is laid along the length of the secondary lining area to be poured; the waterstop strip includes a first side and a second side along the width direction, the first side extending into the secondary lining area to be poured through the through hole. The positioning mechanism is located in the secondary lining pouring area and is suitable for clamping and fixing the first side to the end plate.

[0008] According to the present invention, an embedded waterstop installation structure for a plain concrete section is provided, wherein the positioning mechanism includes: The clamping member includes a clamping part and a connecting part; the clamping part extends in a direction perpendicular to the stop plate, and the clamping part is provided with a clamping space along its own extending direction; A connector suitable for connecting the connecting part and the end plate.

[0009] According to the present invention, an embedded waterstop installation structure for plain concrete sections is provided, wherein multiple clamping members are provided, and the multiple clamping members are arranged at intervals along the length direction of the secondary lining to be poured.

[0010] According to the present invention, an embedded waterstop installation structure for plain concrete sections is provided, wherein the extension direction of the connecting part is perpendicular to the extension direction of the clamping part.

[0011] According to the present invention, an embedded waterstop installation structure in a plain concrete section is provided, wherein the connector includes a binding strap, and the connecting part is fixed to the end plate by the binding strap.

[0012] According to the present invention, an embedded waterstop installation structure for plain concrete sections is provided, wherein the end plate includes two assembled template units, the two template units being arranged opposite to each other and spaced apart, and the through hole being formed between the two template units.

[0013] According to the present invention, an embedded waterstop installation structure for plain concrete sections is provided, wherein the positioning mechanism further includes stiffening ribs, and the stiffening ribs are pressed against the side of the end plate located outside the secondary lining to be poured. The connecting part, the end plate, and the stiffening rib are connected as a whole by the connecting member.

[0014] According to the present invention, an embedded waterstop installation structure for plain concrete sections is provided. After the secondary lining to be poured on the first side is completed, the extension direction of the connecting part is perpendicular to the end plate, so as to clamp the second side.

[0015] According to the present invention, an embedded waterstop installation structure for a plain concrete section is provided, wherein the waterstop includes: The main body is arranged along the length of the secondary lining area to be poured; A self-adhesive layer is disposed on at least one side of the main body along the thickness direction; Ribs protrude from at least one side of the main body along the thickness direction, and multiple ribs located on the same side are provided along the width direction of the main body.

[0016] According to the present invention, an embedded waterstop installation structure for plain concrete sections is provided, wherein the initial support is provided with a waterproof layer on the side facing the secondary lining to be poured. The waterproof layer includes a geotextile nonwoven fabric laid on the initial support and a waterproof board laid on the geotextile nonwoven fabric.

[0017] According to the present invention, an embedded waterstop installation structure in a plain concrete section is provided, wherein the spacing between adjacent clamping members is 0.3 meters.

[0018] According to the present invention, an embedded waterstop installation structure for plain concrete sections is provided, wherein the binding strap includes iron wire.

[0019] This utility model provides an embedded waterstop installation structure for plain concrete sections. When arranging the waterstop, the first side of the waterstop extends into the secondary lining pouring area through a through hole in the end plate, while the second side remains outside the secondary lining pouring area. A positioning mechanism then clamps and positions the first side of the waterstop onto the end plate, thus achieving positioning of the waterstop within the secondary lining pouring area. Compared to related technologies, positioning the waterstop within the secondary lining pouring area effectively solves the problem of waterstop displacement due to concrete impact. Furthermore, the clamping and fixing method, compared to traditional angle steel fixing frames and galvanized lead wire or steel wire binding, effectively avoids problems such as local deformation, tearing, breakage, and puncture by lead or steel wire, ensuring the structural integrity and positional accuracy of the waterstop during fixing and concrete pouring, thereby improving the waterstop effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is one of the structural schematic diagrams of the embedded waterstop installation structure in the plain concrete section provided in this utility model embodiment.

[0022] Figure 2 This is the second schematic diagram of the installation structure of the embedded waterstop in the plain concrete section provided in this embodiment of the utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the waterstop provided in this embodiment of the utility model.

[0024] Figure label: 10. Formwork system; 11. End plate; 110. Through hole; 20. Waterstop; 21. Main body; 22. Self-adhesive layer; 23. Rib; 30. Positioning mechanism; 31. Clamping part; 310. Clamping part; 311. Connecting part; 32. Connecting part; 33. Stiffening rib; 40. Secondary lining waiting area; 50. Secondary lining; 60. Waterproof layer; 61. Geotextile nonwoven fabric; 62. Waterproof membrane; 70. Initial support. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] To better understand the embedded waterstop installation structure in plain concrete sections provided by this utility model, its application background is introduced first. During tunnel construction, in order to adapt to geological conditions, construction technology or structural deformation requirements, structural joints, such as construction joints or expansion joints, need to be reserved at specific locations. However, these structural joints are often the weak links in the tunnel waterproofing system. How to effectively solve the waterproofing at structural joints has become a key issue to ensure the safety and long-term stable operation of the tunnel structure.

[0027] Embedded waterstops are key waterproofing components pre-embedded in the concrete on both sides of structural joints. Before pouring concrete, the embedded waterstops need to be fixed. In traditional construction, angle steel fixing frames, galvanized lead wire or steel wire binding are often used to fix the waterstops.

[0028] However, the methods described above mostly target the portion of the waterstop located outside the pouring area. During concrete pouring, the portion of the waterstop located inside the pouring area will experience significant concrete impact, potentially causing it to shift. Furthermore, under the impact of concrete, the binding and fixing points of the waterstop are prone to uneven stress, which may lead to localized deformation, tearing, breakage, or puncture by steel / lead wires. This makes it difficult to guarantee the structural integrity and positional accuracy of the waterstop, thus affecting its waterproofing effect.

[0029] Therefore, ensuring the structural integrity and accurate positioning of the waterstop to guarantee its water-stopping effect has become an important issue that urgently needs to be addressed.

[0030] Against the above background, this utility model embodiment provides an embedded waterstop installation structure in plain concrete sections, which can ensure the structural integrity and positional accuracy of the waterstop during fixing and concrete pouring, thereby ensuring the waterproofing effect.

[0031] The following is combined with Figures 1-3 This invention describes the installation structure of an embedded waterstop strip in a plain concrete section.

[0032] Reference Figure 1 and Figure 2 An embedded waterstop installation structure for plain concrete sections includes a formwork system 10, a waterstop 20, and a positioning mechanism 30. The formwork system 10 and the initial support 70 form a secondary lining waiting area 40. The formwork system 10 includes a stop plate 11 located on one side of the secondary lining waiting area 40, and the stop plate 11 is provided with a through hole 110 extending along the length direction of the secondary lining waiting area 40. The waterstop 20 is laid along the length direction of the secondary lining waiting area 40 and includes a first side and a second side along the width direction. The first side extends into the secondary lining waiting area 40 through the through hole 110. The positioning mechanism 30 is disposed in the secondary lining waiting area 40 and is suitable for clamping and fixing the first side of the waterstop 20 to the stop plate 11.

[0033] In actual construction, the secondary lining waiting area 40 is enclosed by the formwork system 10 and the initial support 70. Only concrete needs to be poured into the secondary lining waiting area 40 to form the secondary lining 50 of the tunnel. The end plate 11, as the end closing structure of the formwork system 10, is located at the location of the structural joint after pouring, and is also the location for the waterstop 20. When placing the waterstop 20, the first side of the waterstop 20 is inserted into the secondary lining waiting area 40 through the through hole 110 on the end plate 11, and the second side is located outside the secondary lining waiting area 40. Then, the positioning mechanism 30 is used to clamp and position the first side of the waterstop 20 on the end plate 11, thereby achieving the positioning of the waterstop 20 inside the secondary lining waiting area 40. Compared to related technologies, positioning the waterstop 20 within the secondary lining pouring area 40 effectively solves the problem of the waterstop 20 being easily displaced by concrete impact. Furthermore, the clamping and fixing method, compared to traditional methods such as angle steel fixing, galvanized lead wire or steel wire binding, can effectively avoid problems such as local deformation, tearing, breakage, or puncture by lead wire or steel wire of the waterstop 20. This ensures the structural integrity and positional accuracy of the waterstop 20 during fixing and concrete pouring, thereby improving the water-stopping effect.

[0034] It should be noted that after the secondary lining waiting area 40 on the first side of the corresponding waterstop 20 is poured, the first side of the waterstop 20 is already deeply embedded in the secondary lining 50. When pouring concrete into the secondary lining waiting area 40 on the second side of the corresponding waterstop 20, the technical problems mentioned in the background are basically no longer present. Therefore, the above-mentioned technical solution of this utility model embodiment can effectively solve the technical problems mentioned in the background.

[0035] It should be noted that the aforementioned initial support 70 refers to the support structure constructed immediately after tunnel excavation, used to control surrounding rock deformation and ensure construction safety. The structural form of the initial support 70 is generally shotcrete. The secondary lining 50 refers to the permanent lining constructed after the initial support 70 has stabilized, used to provide long-term load-bearing capacity, waterproofing, durability, and adaptability to operational needs.

[0036] In one embodiment of this utility model, a waterproof layer 60 is laid on the side of the initial support 70 facing the secondary lining waiting area 40. After the secondary lining 50 is poured, the waterproof layer 60 can form a waterproof barrier between the initial support 70 and the secondary lining 50 to prevent water from seeping into the tunnel.

[0037] Specifically, the waterproof layer 60 includes a geotextile 61 and a waterproof membrane 62; the geotextile 61 is laid on the initial support 70, and the waterproof membrane 62 is laid on the geotextile 61. The geotextile 61 prevents the waterproof membrane 62 from directly contacting the initial support 70, protecting the waterproof membrane 62 from damage. The waterproof membrane 62 can be made of materials such as high-density polyethylene (HDPE) and polyvinyl chloride (PVC), which have excellent impermeability and can effectively prevent water from penetrating into the interior of the secondary lining 50.

[0038] In some optional embodiments, the specific specifications of the geotextile nonwoven fabric 61 and the waterproof membrane 62 can be flexibly selected according to actual construction needs, and no specific restrictions are imposed in this embodiment of the present invention.

[0039] After the waterproof layer 60 is laid, the secondary lining 50 is constructed. First, the formwork system 10 and the initial support 70 are used to enclose the secondary lining waiting area 40. The specific structural form of the formwork system 10 can refer to the existing formwork trolley, which will not be described in detail in this embodiment. The end plate 11 is the end closing structure of the formwork trolley. Its location is the junction of adjacent secondary linings 50, the location of the structural joint after pouring, and also the location of the waterstop 20.

[0040] After the secondary lining waiting area 40 is completed or at the same time as the construction, the waterstop 20 is installed. When installing the waterstop 20, the first side of the waterstop 20 is inserted into the secondary lining waiting area 40 through the through hole 110. Specifically, the end plate 11 is made of two template units spliced ​​together, with the two template units facing each other and spaced apart. The through hole 110 is formed between the two template units. When installing the waterstop 20, simply place the first side of the waterstop 20 between the two template units, and then splice the two template units together to form the end plate 11, so that the waterstop 20 and the end plate 11 can be matched. Then, the positioning mechanism 30 is used to clamp and position the waterstop 20 on the end plate 11.

[0041] In one embodiment of this utility model, the positioning mechanism 30 includes a clamping member 31 and a connecting member 32; wherein, the clamping member 31 includes a clamping portion 310 and a connecting portion 311, the clamping portion 310 extends along a direction perpendicular to the end plate 11, and the clamping portion 310 is provided with a clamping space along its own extending direction; the connecting member 32 is suitable for connecting the end plate 11 and the connecting portion 311. With this configuration, when fixing the waterstop 20, the first side of the waterstop 20 is clamped and fixed in the clamping space, and then the connecting member 32 is used to connect the end plate 11 and the connecting portion 311 of the connecting member 32, thereby clamping and positioning the first side of the waterstop 20 on the end plate 11, effectively avoiding the problem of the waterstop 20 shifting due to the impact of concrete on the first side of the waterstop 20.

[0042] In one embodiment of this utility model, multiple clamping members 31 are provided, and the multiple clamping members 31 are arranged at intervals along the length direction of the secondary lining to be poured area 40. Specifically, the distance between adjacent clamping members 31 is 0.3 meters. This ensures the stability of the positioning mechanism 30 in clamping and positioning the waterstop 20.

[0043] In one embodiment of this utility model, the extending direction of the connecting part 311 is perpendicular to the extending direction of the clamping part 310. Thus, after the clamping part 310 clamps and positions the first side of the waterstop 20, the connecting part 311 fits into the end plate 11, thereby improving the convenience of connection between the end plate 11 and the connecting part 311.

[0044] In one embodiment of the present invention, the connector 32 includes a binding strap, and the connector 311 and the end plate 11 are bound together by the binding strap, thereby facilitating the installation and removal of the clamping member 31 and the end plate 11.

[0045] Specifically, cable ties can be made of iron wire, lead wire, etc.

[0046] In one embodiment of this utility model, the positioning mechanism 30 further includes a stiffening rib 33, which is pressed against the side of the end plate 11 located outside the secondary lining waiting area 40. The connecting part 311, the end plate 11, and the stiffening rib 33 are connected as a whole by a connecting member 32. Specifically, the connecting part 311, the end plate 11, and the stiffening rib 33 are fixed by binding straps. This arrangement can improve the stability of the clamping member 31 connected to the end plate 11, thereby achieving a more stable clamping and positioning of the waterstop 20.

[0047] Understandably, after the secondary lining 50 corresponding to the first side of the waterstop 20 is poured, the connector 32 and stiffening rib 33 are removed, and the formwork system 10 is moved along the tunnel axis. The poured secondary lining 50, the initial support 70 and the formwork system 10 constitute a new secondary lining waiting area 40. The poured secondary lining 50 can fix the first side of the waterstop 20. The clamping part 310 of the clamping part 31 is poured into the secondary lining 50, while the connecting part 311 is exposed. At this time, the connecting part 311 is straightened, and the connecting part 311 perpendicular to the clamping part 310 becomes an extension in the opposite direction of the clamping part 310, so that the connecting part 311 can clamp the second side of the waterstop 20, thereby providing positioning for the second side of the waterstop 20, further reducing the problems of displacement and damage caused by the impact of concrete on the waterstop 20, and ensuring the waterproof effect.

[0048] Understandably, before pouring the new secondary lining 50, it is necessary to use the positioning mechanism 30 to fix the new waterstop 20 on the end plate 11 of the formwork system 10, and so on, until the entire secondary lining 50 is poured.

[0049] To better understand the cooperation relationship between the waterstop 20, the baffle plate 11, and the positioning mechanism 30 in the embodiments of this utility model, the following will be combined with the attached drawings. Figure 3 The structure of the waterstop 20 is described in detail.

[0050] In one embodiment of this utility model, the waterstop 20 includes a main body 21, a self-adhesive layer 22, and ribs 23. The main body 21 is arranged along the length of the secondary lining area 40 to be poured. The self-adhesive layer 22 is disposed on at least one side of the main body 21 along the thickness direction to improve the interface bonding ability between the waterstop 20 and the secondary lining 50. The ribs 23 protrude and are disposed on at least one side of the main body 21 along the thickness direction. Furthermore, multiple ribs 23 located on the same side are disposed along the width direction of the main body 21. The ribs 23 can not only increase the contact area between the waterstop 20 and the secondary lining 50, extend the water infiltration path, and improve the sealing effect, but also increase the stability of the connection between the waterstop 20 and the secondary lining 50, ensuring that the waterstop 20 is firmly attached to the position of the structural joint.

[0051] Specifically, the waterstop 20 can be made entirely of rubber material.

[0052] It is understood that, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0053] The embedded waterstop installation structure in the plain concrete section provided by this utility model embodiment allows for the placement of the waterstop 20. The first side of the waterstop 20 extends through the through hole 110 on the end plate 11 into the secondary lining pouring area 40, while the second side remains outside the secondary lining pouring area 40. Then, the positioning mechanism 30 clamps and positions the first side of the waterstop 20 onto the end plate 11, thus achieving positioning of the waterstop 20 within the secondary lining pouring area 40. Compared to related technologies, positioning the waterstop 20 within the secondary lining pouring area 40 effectively solves the problem of the waterstop 20 being easily displaced by concrete impact. Furthermore, the clamping and fixing method, compared to traditional angle steel fixing frames and galvanized lead wire or steel wire binding, effectively avoids problems such as local deformation, tearing, breakage, and puncture by lead wire or steel wire. This ensures the structural integrity and positional accuracy of the waterstop 20 during fixing and concrete pouring, thereby improving the waterstop effect.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A structure for installing an embedded waterstop in a plain concrete section, characterized in that, include: The template system (10) and the initial support (70) form a secondary lining waiting area (40); the template system (10) includes a stop plate (11) located on one side of the secondary lining waiting area (40), and the stop plate (11) is provided with through holes (110) along the length direction of the secondary lining waiting area (40). A waterstop (20) is laid along the length of the secondary lining area (40) to be poured; the waterstop (20) includes a first side and a second side along the width direction, the first side extending into the secondary lining area (40) through the through hole (110); The positioning mechanism (30) is located in the secondary lining waiting area (40) and is suitable for clamping and fixing the first side to the head plate (11).

2. The embedded waterstop installation structure in the plain concrete section according to claim 1, characterized in that, The positioning mechanism (30) includes: The clamping member (31) includes a clamping part (310) and a connecting part (311); the clamping part (310) extends in a direction perpendicular to the head plate (11), and the clamping part (310) is provided with a clamping space along its own extending direction; A connector (32) is adapted to connect the connecting part (311) and the baffle plate (11).

3. The embedded waterstop installation structure in the plain concrete section according to claim 2, characterized in that, Multiple clamping members (31) are provided, and the multiple clamping members (31) are arranged at intervals along the length direction of the secondary lining to be poured area (40).

4. The embedded waterstop installation structure in the plain concrete section according to claim 2, characterized in that, The extending direction of the connecting part (311) is perpendicular to the extending direction of the clamping part (310).

5. The embedded waterstop installation structure in the plain concrete section according to claim 2, characterized in that, The connector (32) includes a binding strap, and the connecting part (311) is fixed to the end plate (11) by the binding strap.

6. The embedded waterstop installation structure in plain concrete sections according to claim 1, characterized in that, The head plate (11) includes two assembled template units, which are arranged opposite each other and spaced apart, and the through hole (110) is formed between the two template units.

7. The embedded waterstop installation structure in plain concrete sections according to any one of claims 2 to 5, characterized in that, The positioning mechanism (30) also includes a stiffening rib (33), which is pressed against the side of the end plate (11) located outside the secondary lining waiting area (40); The connecting part (311), the head plate (11) and the stiffening rib (33) are connected as a whole by the connecting member (32).

8. The embedded waterstop installation structure in the plain concrete section according to claim 2, characterized in that, After the secondary lining area (40) corresponding to the first side is poured, the extension direction of the connecting part (311) is perpendicular to the end plate (11) to clamp the second side.

9. The embedded waterstop installation structure in plain concrete sections according to claim 1, characterized in that, The waterstop (20) includes: The main body (21) is arranged along the length of the secondary lining area (40) to be poured; A self-adhesive layer (22) is disposed on at least one side of the main body (21) along the thickness direction; Ribs (23) are protruding on at least one side of the main body (21) along the thickness direction, and multiple ribs (23) located on the same side are provided along the width direction of the main body (21).

10. The embedded waterstop installation structure in the plain concrete section according to claim 9, characterized in that, The initial support (70) is covered with a waterproof layer (60) on the side facing the secondary lining to be poured area (40); The waterproof layer (60) includes a geotextile (61) laid on the initial support (70) and a waterproof membrane (62) laid on the geotextile (61).

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