Reinforced waterproof joint structure at intersection of basement inner support and wall

Abstract

The application relates to the technical field of building waterproof structure, and particularly discloses a reinforced waterproof joint structure at the intersection of an inner support and a wall of a basement, which comprises a basement outer wall and an inner support arranged on the basement outer wall and penetrating through the outer wall; one end of the inner support extends out of the outer wall by a certain length to form a water stop ring, a hollow part of the inner support is filled with concrete, and a concrete sealing layer capable of covering the water stop ring is arranged on the outer side of the basement outer wall; a steel mesh is embedded in the concrete sealing layer; and a waterproof layer is arranged on the outer side of the concrete sealing layer. The patent aims to solve the problem that the waterproof performance of a hole left by an inner support of an existing foundation pit support penetrating through a basement outer wall is weak, and underground water may seep into the basement.

Description

Technical Field

[0001] This utility model relates to the field of building waterproofing construction technology, and in particular to an enhanced waterproofing joint structure at the intersection of support and wall in a basement. Background Technology

[0002] To ensure the safety and stability of existing structures during foundation pit excavation and basement construction, while also guaranteeing the stability of the foundation pit itself, installing internal steel structural supports is a commonly used and effective measure in engineering. However, this support method has limitations; the internal steel structural supports can only be removed after the basement structure is completed, which presents a significant challenge to the waterproofing construction of the basement's exterior walls.

[0003] Currently, the common practice in engineering to handle openings formed when internal supports penetrate basement exterior walls is to leave circular or square openings. This method aims to provide sufficient space for the removal of the internal supports after the basement structure is completed. However, this conventional approach has several drawbacks. Due to the unique shape of circular openings, it is difficult to effectively fix and install water-stop steel plates, failing to form a reliable waterproof barrier. Furthermore, during construction, the space constraints of circular or square openings severely limit the operational space for chiseling construction joints, making it difficult for construction workers to perform precise operations and ensuring the waterproofing quality of the construction joints. If waterproofing fails, groundwater may seep into the basement through the gaps, affecting not only the normal use of the basement but also potentially corroding interior decoration and paving works. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the technical problem solved by this utility model is to provide an enhanced waterproof node structure at the intersection of the internal support and the wall of the basement, so as to solve the problem that the waterproofing is weak at the opening left by the internal support of the existing foundation pit support through the basement exterior wall, which may allow groundwater to seep into the basement.

[0005] To solve the above problems, the technical solution adopted by this utility model is: an enhanced waterproof node structure at the intersection of the basement internal support and the wall, including the basement exterior wall and an internal support set in the basement exterior wall and penetrating the exterior wall; one end of the internal support extends a certain length out of the outer side of the exterior wall to form a water-stop ring, the hollow part of the internal support is filled with concrete, and a concrete sealing layer that can cover the water-stop ring is provided on the outer side of the basement exterior wall, the concrete sealing layer is embedded with a steel mesh; a waterproof layer is provided on the outer side of the concrete sealing layer.

[0006] The beneficial effects of this solution are as follows: By retaining the internal supports within the wall, no concrete construction joints are created at the opening, effectively reducing the risk of leakage due to improper treatment of construction joints. Simultaneously, extending the internal support section to the outer side of the exterior wall serves as a water-stop ring, extending the seepage path and enhancing the water-blocking effect, thus solving the problem of waterproofing difficulties at the opening caused by the existing basement internal supports penetrating the exterior wall and subsequently being removed. Secondly, the opening is sealed with an external concrete sealing layer, upon which a waterproof layer is applied to ensure waterproofing effectiveness. The concrete sealing layer contains embedded steel mesh, utilizing the tensile strength of the steel bars to enhance the overall strength and crack resistance of the sealing layer, further strengthening the reliability of waterproofing in conjunction with the water-stop ring. The additional waterproof layer on the outside, together with the internal structure, forms multiple lines of defense against groundwater infiltration.

[0007] Furthermore, a mortar protective layer is provided outside the waterproof layer.

[0008] By setting a mortar protective layer, the waterproof layer is protected to prevent the waterproof coating from being scratched or peeled off during use, thus ensuring the waterproof effect.

[0009] Furthermore, the basement exterior walls on both sides of the water-stop ring are provided with reinforcing bars with one end embedded in the wall, the reinforcing bars are arranged in a horizontal direction, the steel mesh is arranged in a longitudinal direction and the upper and lower ends are bent in a horizontal direction; the other end of the reinforcing bar is embedded in the concrete sealing layer and overlaps with the horizontal end of the steel mesh.

[0010] By embedding one end of a reinforcing bar into the basement exterior wall and the other end into the concrete sealing layer and overlapping with the steel mesh, an overall force transmission path of "wall-reinforcing bar-steel mesh-sealing layer" is formed, effectively preventing cracking or detachment between structural layers due to insufficient bonding. A reinforced zone is formed around the waterstop ring, and the bonding force between the concrete and the waterstop ring is enhanced through the gripping effect of the reinforcing bar, further blocking the seepage path of groundwater along the contact surface between the waterstop ring and the wall.

[0011] Furthermore, the length of the water-stop ring is 6cm-10cm. If the length is too short, the bonding area between the water-stop ring and the concrete will be insufficient, which will easily lead to leakage; an appropriate length can ensure that the water-stop ring and the concrete are fully engaged, forming a sufficiently long seepage bypass path and improving the waterproofing effect.

[0012] Furthermore, the waterproof layer uses a polyurethane coating. After the liquid coating is applied, it forms a continuous, seamless, elastic film on the substrate surface, thoroughly covering complex nodes such as corners and pipe roots, eliminating the risk of leakage from traditional roll material joints. It adheres firmly to the substrate, is not prone to hollowing or peeling, and is especially suitable for uneven or bumpy surfaces.

[0013] Furthermore, the thickness of the waterproof layer is 1mm-1.5mm. A suitable coating thickness forms a protective layer of sufficient strength to resist debris on the substrate or minor punctures during construction.

[0014] Furthermore, the thickness of the mortar protective layer is 8mm-15mm. A moderate thickness of mortar protective layer makes it easy to apply and reduces costs. It also prevents the coating from being punctured by sharp objects or damaged by external impacts.

[0015] Furthermore, the insertion depth of the reinforcing bar into the wall is 15cm-22cm. This depth ensures that the reinforcing bar is fully anchored to the wall, providing sufficient pull-out resistance and bearing capacity, and ensuring reliable connection with the concrete sealing layer and steel mesh. At the same time, it avoids connection failure due to excessively shallow embedment, or damage to the internal structure of the wall due to excessively deep embedment, which increases construction difficulty and cost. It is suitable for the structural requirements of most basement exterior walls, ensuring the stability and durability of the joint.

[0016] Furthermore, the concrete filling the hollow portion of the internal support and the concrete sealing layer are both made of impermeable micro-expansion concrete. The impermeability effectively blocks water penetration, preventing groundwater from intruding into the structure; the micro-expansion characteristic compensates for the hardening shrinkage of the concrete, avoiding cracks and enhancing the structural density. The combination of these two features improves both waterproofing and structural integrity and durability, reducing the risk of future leakage and maintenance costs, making it suitable for underground engineering scenarios with high requirements for waterproofing and crack resistance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the node structure of this utility model. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method:

[0019] The reference numerals in the accompanying drawings include: basement exterior wall 1, internal support 2, waterstop ring 21, reinforcing bar 31, steel mesh 32, impermeable micro-expansion concrete 33, waterproof layer 34, and mortar protective layer 35.

[0020] The basic implementation examples are as follows: Figure 1 The diagram illustrates an enhanced waterproofing joint structure at the intersection of a basement internal support 2 and a wall. The structure includes a basement exterior wall 1 and an internal support 2 that extends through the exterior wall. One end of the internal support 2 extends a certain length beyond the outer side of the exterior wall to form a water-stop ring 21, with a length of 6cm-10cm (8cm in this embodiment). The hollow portion of the internal support 2 is filled with concrete, and a concrete sealing layer covering the water-stop ring 21 is provided on the outer side of the basement exterior wall 1. A steel mesh 32 is embedded within the concrete sealing layer. The basement exterior wall 1 on both sides of the water-stop ring 21 has inserts 31 embedded in the wall at one end, arranged transversely. The steel mesh 32 is arranged longitudinally with its upper and lower ends bent transversely. The other end of the insert 31 is embedded in the concrete sealing layer and overlaps with the transverse end of the steel mesh 32. A waterproof layer 34 is provided outside the concrete sealing layer, and a mortar protective layer 35 is also provided outside the waterproof layer 34.

[0021] The outermost waterproof structure is designed and installed, including a base treatment coating, a waterproof membrane layer, and an insulation layer from the inside out; finally, the backfill is filled with fluidized solidified soil. The waterproof membrane consists of two 2mm thick self-adhesive polymer-modified bitumen waterproof membranes, and the insulation layer consists of a 4mm thick B1 grade extruded polystyrene board, with a 0.2mm thick plastic film laid on both the inner and outer surfaces of the extruded polystyrene board.

[0022] The waterproof layer 34 is a polyurethane coating with a thickness of 1mm-1.5mm, 1.2mm in this embodiment. The mortar protective layer 35 has a thickness of 8mm-15mm, 10mm in this embodiment. The reinforcing bar 31 is embedded in the wall to a depth of 15cm-22cm, 20cm in this embodiment. The appropriate coating thickness forms a protective layer of sufficient strength, resisting minor punctures from debris on the substrate or during construction. The mortar protective layer 35 is of moderate thickness, easy to apply, and cost-effective. It prevents the coating from being punctured by sharp objects or damaged by external impacts.

[0023] The hollow section of the internal support 2 is filled with concrete, and the concrete sealing layer is made of impermeable micro-expansion concrete 33. The impermeability effectively blocks water penetration and prevents groundwater from intruding into the structure; the micro-expansion characteristic compensates for the hardening shrinkage of the concrete, avoids cracking, and enhances the density of the structure. The combination of the two can improve the waterproofing effect, enhance the overall structure and durability, reduce the risk of leakage and maintenance costs in the later stage, and is suitable for underground engineering scenarios with high requirements for waterproofing and crack resistance.

[0024] The specific construction steps are as follows:

[0025] Step 1: Reserve reinforcing bars 31 simultaneously with the construction of the basement exterior wall 1.

[0026] Step 2: Cut off the inner support 2 along the outer wall of the basement, and leave an 8cm space on the outer side of the wall to make a water-stop ring 21.

[0027] Step 3: Roughen the basement walls and tie the steel mesh at the opening 32.

[0028] Step 4: Install formwork for the two openings of the internal support.

[0029] Step 5: Seal the opening of the internal support by pouring anti-seepage micro-expansion concrete 33.

[0030] Step 6: Apply one layer of polyurethane waterproof coating 34 and one layer of mortar protective layer 35 to the outside of the impermeable micro-expansion concrete 33.

[0031] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A reinforced waterproof joint structure at the intersection of a support and a wall in a basement, characterized in that: It includes the basement exterior wall and an internal support installed on and penetrating the basement exterior wall; one end of the internal support extends a certain length beyond the outer side of the exterior wall to form a water-stop ring, the hollow part of the internal support is filled with concrete, and a concrete sealing layer is provided on the outer side of the basement exterior wall to cover the water-stop ring, the concrete sealing layer is embedded with a steel mesh; a waterproof layer is provided on the outer side of the concrete sealing layer.

2. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 1, characterized in that: A mortar protective layer is also provided outside the waterproof layer.

3. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 1, characterized in that: The basement exterior walls on both sides of the water-stop ring are provided with reinforcing bars with one end embedded in the wall. The reinforcing bars are arranged horizontally, and the steel mesh is arranged longitudinally with its upper and lower ends bent horizontally. The other end of the reinforcing bar is embedded in the concrete sealing layer and overlaps with the horizontal end of the steel mesh.

4. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 1, characterized in that: The length of the water-stop ring is 6cm-10cm.

5. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 1, characterized in that: The waterproof layer is made of polyurethane coating.

6. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 5, characterized in that: The thickness of the waterproof layer is 1mm-1.5mm.

7. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 2, characterized in that: The thickness of the mortar protective layer is 8mm-15mm.

8. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 3, characterized in that: The insertion depth of the reinforcing bar into the wall is 15cm-22cm.

9. The reinforced waterproof joint structure at the intersection of the basement support and the wall as described in claim 1, characterized in that: The concrete filling the hollow part of the internal support and the concrete sealing layer are both made of impermeable micro-expansion concrete.

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