Construction joint water stop structure and method for sequentially constructing wallboards at underground space communication interface

Abstract

According to the water stop structure and method for the construction joints of the wallboards constructed in sequence at the communicating connector of the underground space, the combined water stop steel plate formed by welding the groove-shaped steel plate and the wing-shaped steel plate which are good in water stop effect and convenient to construct is adopted as a waterproof material, the composite water stop measure of three water stop measures and multiple fortification is adopted, and prevention and drainage are combined. The first water stopping measure is composed of a groove-shaped first water stopping steel plate, a wing-shaped second water stopping steel plate, water swelling water stopping glue and a grouting pipe. The second water stop measure is composed of a waterproof coiled material, a polysulfide sealant and a protection plate; the third water stopping measure is a drainage measure which is composed of a top plate side wall water receiving groove, a bottom plate water retaining ridge and a drainage pipe, and even if leakage water occurs, the leakage water is collected by the water receiving groove and drained to a floor drain through the bottom plate drainage pipe. The method is suitable for water stop of deep underground space, construction joints between urban rail transit main bodies and accessories and construction joints of long-term reserved construction joints.

Description

Technical Field

[0001] This invention relates to the field of waterproofing engineering for deep underground space structures, specifically to the problem of water leakage at construction joints of wall panels constructed in stages in deep underground spaces, and particularly to a water-stopping structure and method for construction joints of wall panels constructed in stages at the connection interface of underground spaces. Background Technology

[0002] Water leakage at construction joints of wall panels installed in phases is a very common problem in underground engineering, troubling many engineering technicians. Leaks at construction joints in passageways affect pedestrian traffic, the building's appearance, cause corrosion and damage to finishing materials, and can lead to safety accidents. The usual practice for construction joints at wall panel interfaces is to use two layers of water-swellable sealant plus a grouting pipe. However, due to factors related to the materials themselves, construction conditions, and construction techniques, water leakage at construction joints is often severe, manifesting primarily in the following ways:

[0003] (1) Material limitations: In the existing technology, the construction joint at the wall panel interface cannot be reserved for steel plate water stop because the structure needs to be constructed in stages. The water stop material is mostly water-swellable sealant. Water-swellable sealant has high requirements for the flatness of the base surface and requires grooving. It cannot be closely adhered to the concrete and is difficult to complete on the concrete surface, resulting in the water-swellable sealant not adhering closely to the concrete, forming a water seepage channel.

[0004] (2) On-site construction conditions: The construction joint at the wall panel interface is limited by space and humidity. The structural steel reinforcement is dense, and it is difficult to carry out the base surface treatment and installation and fixing according to the design requirements on-site. Therefore, it is necessary to find simple and easy-to-construct measures to improve the efficiency and meet the water-stopping requirements.

[0005] (3) Maintenance difficulty and cost: Water leakage occurs at the construction joints at the interface and needs to be treated. The ground has been restored to a road or is restricted by the building, making ground treatment difficult and the effect poor. The underground decoration has been completed and needs to be removed, which is inefficient, difficult and costly.

[0006] In summary, the existing methods for sealing construction joints between wall panels in phased construction of underground spaces have many shortcomings. These shortcomings increase the difficulty and cost of maintenance, necessitating technological innovation to solve these problems. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects of the prior art and provide a method and structure for constructing a water-stopping structure for the construction joint of wall panels at the interface of underground space connections. This invention solves at least some of the problems in the prior art.

[0008] This invention is implemented as follows:

[0009] This invention provides a water-stopping structure for construction joints of wall panels constructed sequentially at the interface of an underground space, comprising a first water-stopping steel plate installed in the initial structural wall and a second water-stopping steel plate installed in the later structural slab. The first and second water-stopping steel plates are connected to form a combined water-stopping steel plate, which is located on the extension path of the construction joint of the sequentially constructed wall panels.

[0010] Furthermore, the first water-stop steel plate is a channel-shaped steel plate.

[0011] Furthermore, the second water-stop steel plate is an airfoil steel plate.

[0012] Furthermore, water-swellable sealant is also provided at the construction joints of the successively applied wall panels.

[0013] Furthermore, grouting pipes are also provided at the construction joints of the wall panels that are constructed sequentially.

[0014] Furthermore, a waterproof membrane is provided at the water-facing end of the construction joint of the wall panels that are constructed sequentially, and the waterproof membrane extends from the water-facing surface of the earlier structural wall to the water-facing surface of the later structural panel.

[0015] Furthermore, the waterproof membrane is in a bent state, and polysulfide sealant is applied to the ends of the waterproof membrane and the bends facing the construction joints of the wall panel.

[0016] Furthermore, the backwater end of the construction joint of the wall panels constructed sequentially is also provided with a water receiving trough, which is located on the top plate and side wall of the underground space connection interface.

[0017] Furthermore, the bottom slab of the underground space connection interface is also provided with a first water-retaining sill and a second water-retaining sill. The first water-retaining sill is located on the inner bottom surface of the early structural wall, and the second water-retaining sill is located on the inner bottom surface of the later structural slab. The first water-retaining sill and the second water-retaining sill form a water-retaining groove. The construction joint of the wall panels constructed successively is located between the first water-retaining sill and the second water-retaining sill. The water receiving groove is connected to the water-retaining groove, and the water-retaining groove is provided with a drainage pipe.

[0018] This invention also provides a method for sealing the construction joint of wall panels at the interface of underground space, comprising the following steps:

[0019] S1. Pre-construction retaining structure;

[0020] S2. After the initial enclosure structure is completed, install protective plates around the underground space connection interface and install waterproof membrane in close contact with the protective plates.

[0021] S3. Tie the steel reinforcement cage of the initial structural wall and install the first waterstop steel plate;

[0022] S4. Pour the preliminary structural wall, and set the first water-retaining sill on the inner bottom surface of the preliminary structural wall;

[0023] S5. After the initial structural wall construction is completed, the concrete at the underground space connection interface corresponding to the initial retaining structure is removed, the protective plate is removed, and the second waterstop steel plate is welded to the first waterstop steel plate.

[0024] S6. Install water-swellable sealant and grouting pipe;

[0025] S7. After bending the waterproof membrane at the bottom plate and side wall of the underground space connection interface, use polysulfide sealant to seal the joint.

[0026] S8. Concrete is poured to construct the later structural slab, and a second water-retaining sill is provided on the inner bottom surface of the later structural slab. The water-retaining groove formed by the first water-retaining sill and the second water-retaining sill is connected to the floor drain through a drainage pipe.

[0027] S9. After bending the waterproof membrane on the top slab of the underground space connection interface, use polysulfide sealant to seal the joint.

[0028] S10, Water collection channels on the top slab and side walls at the connection interface of the underground construction space.

[0029] The present invention has the following beneficial effects:

[0030] 1. This invention solves the problem of not being able to use steel plate waterstops at construction joints of wall panels by welding channel steel plates and wing steel plates in stages, and solves the problem of high requirements for on-site construction. Even if on-site construction is limited, the waterstop quality can be guaranteed, construction efficiency can be improved, and construction costs can be reduced.

[0031] 2. In this invention, a water receiving trough is provided at the back end of the construction joint of the wall panels, which are constructed sequentially. The water receiving trough is located on the top plate and side wall of the underground space connection interface. A first water-retaining sill and a second water-retaining sill are also provided on the bottom plate of the underground space connection interface. The first water-retaining sill and the second water-retaining sill form a water-retaining trough. The water receiving trough is connected to the water-retaining trough. The water-retaining trough is connected to the floor drain through a drain pipe, which can drain the water in the water-retaining trough in a timely manner. Even if leakage occurs, drainage can be carried out quickly and efficiently.

[0032] 3. This invention adopts a multi-layered composite water-stopping structure, which solves the problem that even if one layer of defense is damaged, the remaining layers can still ensure the water-stopping effect of the construction joint and effectively isolate groundwater. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 Diagram of the pre-construction stage structural waterproofing measures provided in this embodiment of the invention;

[0035] Figure 2 Provided for embodiments of the present invention Figure 1 Enlarged view of the upper half;

[0036] Figure 3 Provided for embodiments of the present invention Figure 1 Enlarged view of the lower half;

[0037] Figure 4 Diagram illustrating structural waterproofing measures during the later construction phase, as provided in this embodiment of the invention.

[0038] Figure 5 Provided for embodiments of the present invention Figure 4 Enlarged view of the upper half;

[0039] Figure 6 Provided for embodiments of the present invention Figure 4 Enlarged view of the lower half;

[0040] Figure 7 The welding diagram of the combined waterstop steel plate provided in the embodiment of the present invention.

[0041] In the diagram: 1. Initial structural wall; 2. First water-stop steel plate; 3. Later structural slab; 4. Second water-stop steel plate; 5. Construction joint of wall panel; 6. Water-swellable water-stop sealant; 7. Grouting pipe; 8. Waterproof membrane; 9. Polysulfide sealant; 10. Water collection trough; 11. First water retaining wall; 12. Second water retaining wall; 13. Drainage pipe; 14. Initial enclosure structure; 15. Protective plate; 16. Floor drain; 17. Top slab; 18. Bottom slab; 19. Concrete at the interface connecting the initial enclosure structure to the underground space. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0045] like Figures 1-7 This invention provides a composite water-stop structure for sequentially constructed wall panel construction joints at the interface of an underground space connection. It includes a first water-stop steel plate 2 within the initial structural wall 1 and a second water-stop steel plate 4 within the subsequent structural slab 3. The first and second water-stop steel plates 2 and 4 are connected to form a combined water-stop steel plate, which is located on the extension path of the sequentially constructed wall panel construction joint 5. The underground space structure is constrained by the initial retaining structure 14. The initial structural wall 1 and the subsequent structural slab 3 need to be constructed in stages. The initial retaining structure 14 is constructed first, followed by the initial structural wall 1, and the concrete 19 at the corresponding underground space connection interface of the initial retaining structure is removed. Finally, the subsequent structural slab 3 is constructed, so that the opening in the subsequent structural slab 3 is connected to the opening in the initial structural wall 1. The sequentially constructed wall panel construction joint 5 is the gap formed between the initial structural wall 1 and the subsequent structural slab 3. The first water-stop steel plate 2 and the second water-stop steel plate 4 are connected to form a combined water-stop steel plate, which can prevent external water from seeping into the underground space structure through the construction joint 5 of the successively constructed wall panels. In this embodiment, the first water-stop steel plate 2 is a channel-shaped steel plate. The second water-stop steel plate 4 is a wing-shaped steel plate. The flange of the first water-stop steel plate 2 faces the first structural wall 1, and the web of the first water-stop steel plate 2 is welded to the second water-stop steel plate 4. A water-blocking wing plate is provided at the end of the second water-stop steel plate 4 away from the first water-stop steel plate 2. The first water-stop steel plate 2 is set around the opening of the first structural wall 1, and the second water-stop steel plate 4 is set around the opening of the later structural slab 3. This invention solves the problem that steel plate water-stopping cannot be used at the construction joint of the wall panel by welding the channel-shaped steel plate and the wing-shaped steel plate implemented in stages, and solves the problem of high requirements for on-site construction. Even if on-site construction is limited, the water-stopping quality can be guaranteed, construction efficiency can be improved, and construction costs can be reduced.

[0046] The construction joint 5 of the successively constructed wall panels is also equipped with water-swellable sealant 6 and grouting pipe 7, which work together with the combined steel plate to stop water and improve the water-stopping effect. If water seepage still occurs at the construction joint 5 of the successively constructed wall panels due to accidents, grout can be injected into the construction joint 5 of the successively constructed wall panels through the grouting pipe 7 to fill the gaps in the joint and stop the water, which greatly reduces the difficulty and cost of later maintenance.

[0047] A waterproof membrane 8 is also provided at the water-facing end of the construction joint 5 of the wall panels, which is constructed sequentially. The waterproof membrane 8 extends from the water-facing surface of the initial structural wall 1 to the water-facing surface of the later structural panel 3. The waterproof membrane 8 is in a bent state, and polysulfide sealant 9 is provided at the ends of the waterproof membrane 8 and at the bends facing the construction joint 5 of the wall panels. Utilizing the "elastic sealing + strong adhesion + weather resistance and corrosion resistance" characteristics of polysulfide sealant 9, the risk of leakage at the weak points of the waterproof membrane 8 is solved, ensuring that the waterproof membrane 8 can play a good waterproof role.

[0048] In this embodiment, the backwater end of the construction joint 5 of the sequentially constructed wall panels is also provided with a water receiving trough 10, which is located on the top slab 17 and side wall of the underground space connection interface. The bottom slab 18 of the underground space connection interface is also provided with a first water-retaining sill 11 and a second water-retaining sill 12. The first water-retaining sill 11 is located on the inner bottom surface of the initial structural wall, and the second water-retaining sill 12 is located on the inner bottom surface of the later structural slab. The first water-retaining sill 11 and the second water-retaining sill 12 form a water-retaining trough. The construction joint 5 of the sequentially constructed wall panels is located between the first water-retaining sill 11 and the second water-retaining sill 12. The water receiving trough 10 is connected to the water-retaining trough. The water-retaining trough is provided with a drain pipe 13, which can promptly drain the water in the water-retaining trough, ensuring rapid and efficient drainage even in the event of leakage.

[0049] This invention employs a multi-layered composite water-stopping structure, which ensures that even if one layer of defense is breached, the remaining layers can still guarantee the water-stopping effect of the construction joint and effectively isolate groundwater.

[0050] This invention includes an early construction phase and a later construction phase. The structural waterproofing measures in the early construction phase include... Figures 1-3 As shown, the structural waterproofing measures in the later construction stage are as follows: Figures 4-6 As shown.

[0051] 1) Preliminary construction stage: After the preliminary retaining structure 14 is completed, protective plates 15 are installed around the passage interface, waterproof membrane 8 is installed, and then the first water-stop steel plate 2 is installed, which can be welded to the steel bars of the preliminary structural wall 1; the preliminary structural wall 1 is poured, and the first water-stop sill 11 is provided on the bottom surface of the preliminary structural wall 1.

[0052] 2) Later construction stage: Remove the concrete 19 at the underground space connection interface corresponding to the initial retaining structure; remove the protective plate 15; weld the second water-stop steel plate 4 to the first water-stop steel plate 2; install water-swellable water-stop sealant 6 and grouting pipe 7; after bending the waterproof membrane 8 of the bottom plate and side wall at the underground space connection interface, use polysulfide sealant 9 to seal the joint; pour concrete to construct the later structural slab 3; the inner bottom surface of the later structural slab 3 is provided with a second water-retaining sill 12; reserve a drainage pipe 13 to connect to the floor drain 16; after bending the waterproof membrane 8 of the top plate 17 at the underground space connection interface, use polysulfide sealant 9 to seal the joint.

[0053] 3) The top slab 17 and the side wall water inlet trough 10 at the underground space connection interface during construction.

[0054] Embodiment 2 of the present invention provides a composite water-stopping method for construction joints of wall panels applied sequentially at the interface of underground space connections, specifically including the following steps:

[0055] S1, Pre-construction retaining structure 14;

[0056] S2. After the initial enclosure structure 14 is completed, a protective plate 15 is installed around the underground space connection interface, and a waterproof membrane 8 is installed in conjunction with the protective plate 15.

[0057] S3. Tie the steel reinforcement cage of the initial structural wall 1, and install the first waterstop steel plate 2. The first waterstop steel plate 2 can be welded to the steel reinforcement of the initial structural wall 1.

[0058] S4. Cast the preliminary structural wall 1, and provide a first water-stop sill 11 on the inner bottom surface of the preliminary structural wall 1; the web of the first water-stop steel plate 2 is exposed outside the preliminary structural wall 1 and is used to weld with the second water-stop steel plate 4.

[0059] S5. After the initial structural wall 1 is completed, the concrete 19 at the underground space connection interface corresponding to the initial retaining structure is removed, the protective plate 15 is removed, and the second water-stop steel plate 4 is welded to the first water-stop steel plate 2.

[0060] S6. Install water-swellable sealant 6 and grouting pipe 7;

[0061] S7. After bending the bottom plate 18 and the waterproof membrane 8 at the side wall of the underground space connection interface, use polysulfide sealant 9 to seal the joint.

[0062] S8. Concrete is poured to construct the later structural slab 3, and a second water-blocking sill 12 is provided on the inner bottom surface of the later structural slab 3. The water-blocking groove formed by the first water-blocking sill 11 and the second water-blocking sill 12 is connected to the floor drain 16 through the drain pipe 13.

[0063] S9. After bending the waterproof membrane 8 of the top plate of the underground space connection interface, use polysulfide sealant 9 to seal the joint.

[0064] S10, the top slab 17 and the water collection trough 10 on the side wall at the connection interface of the underground construction space.

[0065] This invention provides a composite water-stopping measure for construction joints of wall panels at the interface of underground spaces, which is constructed sequentially. It uses a combined water-stopping steel plate formed by welding channel-shaped and wing-shaped steel plates, which offer good water-stopping effects and are easy to construct, as the waterproofing material. The composite water-stopping measure employs three layers of water-stopping measures for multiple layers of protection, combining prevention and drainage. The first water-stopping measure consists of a channel-shaped first water-stopping steel plate 2, a wing-shaped second water-stopping steel plate 4, water-swellable water-stopping adhesive 6, and a grouting pipe 7. The second water-stopping measure consists of a waterproof membrane 8, polysulfide sealant 9, and a protective plate 15. The third water-stopping measure is a drainage measure, consisting of a water-receiving trough 10 on the top slab side wall, a water-retaining sill on the bottom slab (first water-retaining sill 11 and second water-retaining sill 12), and a drainage pipe 13. Even if leakage occurs, the water is collected by the water-receiving trough 10 and discharged through the bottom slab drainage pipe 13 to the floor drain 16.

[0066] This invention provides a composite water-stopping measure for deep underground space structures to ensure that the construction joints of wall panels constructed in stages do not leak. It is applicable to water-stopping of construction joints in deep underground spaces, between the main body and ancillary structures of urban rail transit, and construction joints of future reserved construction interfaces.

[0067] This invention uses a composite water-stop steel plate, formed by welding channel steel plates and wing-shaped steel plates, as the main material, abandoning the use of water-swellable sealing adhesive. This invention incorporates a drainage pipe, ensuring timely drainage even in the event of leakage. The invention utilizes a composite water-stop steel plate with low on-site construction requirements, employs multiple layers of protection, and combines prevention and drainage, reducing subsequent leakage repairs. This method is simple to implement, structurally safe, economical, technologically mature, has broad prospects, and offers good benefits.

[0068] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wallboard construction joint waterstop structure for successively applied at an interface of a connecting underground space, characterized in that: The first water-stop steel plate is arranged in the early structure wall, and the second water-stop steel plate is arranged in the late structure plate. ​ 2. The underground space connection interface of claim 1, wherein the wallboard construction joint waterstop structure is sequentially applied. The first water-stop steel plate is a groove-shaped steel plate.

3. The underground space connection interface according to claim 1, wherein the wallboard construction joint waterstop structure is sequentially applied. The second water-stop steel plate is a wing-shaped steel plate.

4. The underground space connection interface according to claim 1, wherein the wallboard construction joint waterstop structure is sequentially applied. The water-swelling water-stop glue is arranged at the wall plate construction joint.

5. The underground space connection interface according to claim 1, wherein the wallboard construction joint waterstop structure is sequentially applied. The grouting pipe is arranged at the wall plate construction joint.

6. The underground space connection interface according to claim 1, wherein the wallboard construction joint waterstop structure is sequentially applied. The waterproof roll is arranged at the water-approaching end of the wall plate construction joint.

7. The underground space connection interface according to claim 6, wherein the wallboard construction joint waterstop structure is sequentially applied. The waterproof roll is in a bent state, and the end of the waterproof roll and the bent part towards the wall plate construction joint are provided with polysulfide sealant.

8. The underground space connection interface according to claim 1, wherein the wallboard construction joint waterstop structure is sequentially applied. The water receiving groove is arranged at the backwater end of the wall plate construction joint.

9. The underground space connection interface according to claim 8, wherein the wallboard construction joint waterstop structure is sequentially applied. The first and second water-stopping ridges are arranged on the bottom plate of the underground space communication interface.

10. A method for sealing a construction joint of a wall panel successively applied at a connection interface of underground spaces, characterized in that, The first water-stopping ridge is arranged on the inner bottom surface of the early structure wall, and the second water-stopping ridge is arranged on the inner bottom surface of the late structure plate. The first and second water-stopping ridges form a water-stopping groove, and the wall plate construction joint is located between the first and second water-stopping ridges. The water-stopping groove is in communication with the water receiving groove, and the water-stopping groove is provided with a drain pipe. The method comprises the following steps: S1, constructing an early enclosure structure; S2, after the early enclosure structure is constructed, installing a protection plate around the underground space communication interface, and installing a waterproof roll on the protection plate; S3, binding the steel reinforcement cage of the early structure wall, and installing a first water-stop steel plate; S4, pouring the early structure wall, and arranging a first water-stopping ridge on the inner bottom surface of the early structure wall; S5, after the early structure wall is constructed, removing the concrete at the underground space communication interface of the early enclosure structure, removing the protection plate, and welding a second water-stop steel plate with the first water-stop steel plate; S6, installing water-swelling water-stop glue and a grouting pipe; S7, after the waterproof roll at the bottom plate and the side wall of the underground space communication interface is bent, the polysulfide sealant is used for closing; S8, pouring concrete to construct a late structure plate, and arranging a second water-stopping ridge on the inner bottom surface of the late structure plate, so that the water-stopping groove formed by the first and second water-stopping ridges is connected to the floor drain through the drain pipe; S9, after the waterproof roll at the top plate of the underground space communication interface is bent, the polysulfide sealant is used for closing; S10, constructing a water receiving groove on the top plate and the side wall of the underground space communication interface.

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