Background introduction

The structure and usage of basement determine the complexity of basement waterproofing. Basement leakage is a common phenomenon, which is a headache for owners and construction units. From the structural principle, because the foundation force of the building is often inconsistent, the foundation is subject to geological changes such as groundwater, the occurrence of settlement is affirmative. If uneven settlement occurs, it will have a greater impact on the structure. Once the structure cracks and deforms, it is a great challenge to the waterproof layer. Often, water leakage occurs. How to do a good job of basement waterproofing is a big problem that everyone is very concerned about.

Key parts of waterproofing

According to the structural characteristics of roof buildings, the key parts of waterproofing are:

1. Waterproofing layer connection of basement floor, including pile head, anchor rod, foundation pit, post-pouring zone, construction joints, etc.

2. Basement sidewall, including outcrop reinforcement, wall-piercing pipe, waterproof layer protection, etc.

3. Basement roof location, material selection and applicability of planting roof, equipment installation, roof pool, etc.

Waterproof treatment measures

According to the analysis of the key parts of basement waterproofing, the waterproofing treatment is carried out.

1. Basement floor position

Basement floor should be grade I waterproofing (more than 2 waterproofing materials) or grade II waterproofing (1 waterproofing material) according to geographical environment, construction environment and other factors, combined with the design thickness and requirements of basement floor structural layer.

In the pile head, anchor, foundation pit, post-pouring belt, construction joints and other details, should be strengthened treatment, construction in strict accordance with the norms. The new-old junction, construction joints, pile heads, anchors and other special parts must be pre-treated with permeable materials before the construction of waterproof layer. The settlement problem should be paid attention to at the turning side wall of the floor, and the construction sections (positions) with empty pavement and full sticking should be reasonably set up. It is necessary to strengthen the overlap of floor material and side wall material, and complete waterproofing.

2. Side wall of basement

The main problems of basement sidewall are outcrop reinforcement, wall-piercing pipe, waterproof layer protection and so on. Outcrop reinforcement should be treated well, permeable materials can be used to pretreat, flexible sealing materials should be sealed well; wall-piercing pipes should be well waterproof (water stop rings, etc.) in accordance with the specifications, while sealing flexible sealing materials; side wall waterproof layer usually damages the waterproof layer because of backfilling in the basement, attention should be paid to the material setting of the protective layer and good protection.

3. Roof position of basement

Material selection of planting roof of basement roof, due to the compatibility of rootproof puncture layer and common waterproof layer, and the applicability of construction, often occurs in design and construction that does not conform to the actual situation, resulting in chemical reactions between materials, loss or significant weakening of waterproof performance; causing destruction of waterproof material during construction, making waterproof layer can not meet the functional design requirements. Material applicability and construction rationality should be analyzed, and appropriate materials and construction technology should be selected.

Other equipment installation, roof pool and other issues, should be strictly in accordance with the norms of material selection, construction, joint parts to strengthen waterproof and sealing.

Attention

Waterproofing materials must conform to the relevant national standards, and have the corresponding test reports, factory certificates and other information.

During construction, professional construction plan and professional construction team must be established.

After completion of construction, pay attention to protecting waterproof layer.