Basement outer wall post-cast joint structure
By installing waterstops and waterproof mortar at the joints of the basement exterior walls, the difficulties in sealing and leakage at these joints were resolved, resulting in convenient construction and improved waterproofing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CONSTR GRP
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-14
AI Technical Summary
In existing building construction, there are difficulties in sealing the interface between the post-cast exterior wall of the basement and the foundation wall, resulting in problems such as grout leakage and poor waterproofing performance.
The design employs a waterstop and waterproof mortar, which involves setting rectangular protrusions at the interface between the foundation-cast wall and the post-cast wall to form a waterproof material filling groove, and then filling it with waterproof mortar to improve sealing.
It improves the ease of template construction and waterproofing performance, avoids grout leakage, and enhances wall quality.
Smart Images
Figure CN224495221U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, and in particular to a post-cast interface structure for basement exterior walls. Background Technology
[0002] In current building construction, basement exterior walls are typically constructed by first pouring the underground portion and foundation walls, followed by pouring the above-ground walls on top of the foundation walls. The joint between the foundation-poured walls and the subsequently poured walls requires additional waterproofing treatment to prevent water seepage and ensure the wall's quality.
[0003] In the existing technology, the rectangular protrusions on the foundation-cast wall and the interlocking joints formed after the subsequent wall is cast constitute an integrated structure of the foundation-cast wall and the subsequent wall.
[0004] The disadvantages of existing technology are: when constructing the formwork for the post-cast wall, it is difficult to seal the contact between the formwork and the foundation wall; grout leakage occurs at the bottom during the pouring of the post-cast wall; and a large amount of concrete accumulates at the interface between the foundation wall and the post-cast wall, affecting the quality of the wall surface and causing trouble for subsequent wall construction. Furthermore, the waterproofing performance at the interface is poor. Utility Model Content
[0005] To address the shortcomings of existing technologies, such as grout leakage at the bottom and poor waterproofing at the joints during post-cast wall construction, this utility model discloses a post-cast joint structure for basement exterior walls.
[0006] The technical solution adopted by this utility model to achieve the purpose of the invention is: a post-cast interface structure for basement exterior walls, including: a waterstop plate, a foundation cast wall and a post-cast wall, wherein the waterstop plate is set at the center of the foundation cast wall and the post-cast wall, and the foundation cast wall and the post-cast wall form an interlocking two-time cast integrated structure.
[0007] The interface center of the foundation wall is a rectangular protrusion. The post-cast wall is cast through the rectangular protrusion on the foundation wall to form an integral connection between the foundation wall and the post-cast wall.
[0008] The thickness of the walls on both sides at the interface of the post-cast wall is less than the thickness of the foundation-cast wall, and the foundation-cast wall and the post-cast wall form a waterproof material filling groove at the interface.
[0009] The waterproof material filling groove is filled with waterproof mortar.
[0010] The advantages of this utility model are: simple structure, convenient construction, no increase in construction cost and good waterproof performance. In particular, it solves the technical problems caused by the convenient construction of post-cast wall formwork and grout leakage.
[0011] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description
[0012] Appendix Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Appendix Figure 2 A schematic diagram of the structure for constructing the formwork for the post-cast wall.
[0014] In the attached diagram: 1. Foundation pouring wall, 1-1. Rectangular protrusion, 2. Post-pouring wall, 3. Waterproof material filling groove, 4. Waterproof mortar, 5. Formwork, 6. Adhesive material. Detailed Implementation
[0015] A post-cast interface structure for a basement exterior wall includes: a waterstop plate, a foundation-cast wall, and a post-cast wall, wherein the waterstop plate is disposed at the center of the foundation-cast wall and the post-cast wall.
[0016] The foundation-cast wall and the post-cast wall form an interlocking structure, which is poured into one piece by two separate pours.
[0017] The interface center of the foundation wall 1 is a rectangular protrusion 1-1. The post-cast wall 2 is cast through the rectangular protrusion 1-1 on the foundation wall 1 to form an integral connection between the foundation wall 1 and the post-cast wall 2.
[0018] The thickness of the walls on both sides at the interface of the post-cast wall 2 is less than the thickness of the foundation-cast wall 1, and the foundation-cast wall 1 and the post-cast wall 2 form a waterproof material filling groove 3 at the interface. Waterproof mortar 4 is placed in the waterproof material filling groove 3.
[0019] The waterproof material filling groove 3 is set up so that after the foundation wall 1 and the post-cast wall 2 are poured, the waterproof material in the waterproof material filling groove 3 can seal the joint and effectively prevent water from accumulating on the exterior wall through the joint.
[0020] The installation of the waterproof material filling groove 3 greatly facilitates the construction of the formwork 5 for the subsequent pouring of the wall 2. Adhesive material 6 is placed in the waterproof material filling groove 3 on the formwork 5 of the wall 2, thus solving the problems of fixing and sealing the formwork 5. Furthermore, after the formwork 5 is removed, the adhesive material 6 naturally forms the shape of the waterproof material filling groove 3. This also significantly improves the wall surface quality at the interface between the foundation pouring wall 1 and the subsequent pouring wall 2, resolving the subsequent construction problems caused by concrete leakage and grout accumulation at the interface.
Claims
1. A post-cast interface structure for basement exterior walls, comprising: The waterstop plate, the foundation-cast wall, and the post-cast wall are all included. The waterstop plate is located at the center of both the foundation-cast wall and the post-cast wall. The foundation-cast wall and the post-cast wall form an interlocking, two-stage cast-in-place structure, characterized by: The interface center of the foundation cast wall (1) is a rectangular protrusion (1-1). The post-cast wall (2) is cast through the rectangular protrusion (1-1) on the foundation cast wall (1) to form an integral connection between the foundation cast wall (1) and the post-cast wall (2). The thickness of the walls on both sides at the interface of the post-cast wall (2) is less than the thickness of the foundation cast wall (1), and the foundation cast wall (1) and the post-cast wall (2) form a waterproof material filling groove (3) at the interface. Waterproof mortar (4) is placed in the waterproof material filling groove (3).