What are the main causes of water leakage in underground structures?

Design reason: one-sided emphasis on the self-waterproof function of the structure, no flexible additional waterproof layer.

Structural concrete is a heterogeneous composite material composed of several materials with many pores of various sizes inside, often channels for water seepage. Even if the compactness of the concrete itself is improved by various means, the leakage rigid structure of the basement still cannot resist the action of external forces such as **, temperature difference deformation, uneven settlement, etc., resulting in cracks in the structure and the formation of leakage water channels. In the basement of some projects, the bottom plate is not designed with a waterproof layer, or the bottom plate is waterproofed internally, but only in the envelope structure.

It is not uncommon for the façade of the wall to be provided with a waterproof layer, so that the waterproof layer does not intersect and cannot reach the overall airtight state, resulting in basement leakage.

Data reason: poor selection of waterproof concrete raw materials, cement labeling.

Basement leakage caused by too low, expired agglomeration, aggregate particle size not meeting the requirements, excessive mud content, and unqualified admixture quality. Improper selection of flexible additional waterproof layer. For example, ordinary paper tire linoleum or jute with poor durability is used.

tire linoleum; Use of waterproofing membranes.

The thickness is too small, not resistant to puncture and easy to damage; The waterproof layer of the coating film adopts water emulsion coating, which is temporarily immersed in groundwater, and the coating film deteriorates due to re-emulsification, and loses its waterproof ability and causes basement leakage; When using synthetic polymer coils, no matching adhesives are used. As a structural self-waterproofing concrete marker.

The higher the impermeability level, the more cement per unit volume, the result is a large accumulation of hydration heat inside the concrete, and the temperature difference shrinkage occurs in the concrete during the cooling process, resulting in cracks in the structure; In addition, at present, the basement structure mostly adopts pumping high-strength impermeable concrete, and the unit cement consumption and water-cement ratio.

Larger, resulting in dry shrinkage cracks in the structure. For other reasons, the construction unit uses inferior waterproof materials or cuts corners, such as the thickness of the waterproof layer of the coating film is too thin to meet the requirements, and the waterproof effect cannot be used, resulting in basement leakage.

Construction reasons: the foundation is not well disposed of, and the building has uneven settlement, resulting in structural cracking and waterproof layer damage and basement leakage. The construction quality of waterproof concrete is not good. Including concrete mix ratio.

The water-cement ratio is not strictly controlled, the vibration is not real, the maintenance is not thorough, and there are problems such as honeycomb, hemp surface, and holes, which lead to the basement structure concrete is not dense and there are many leakage water channels. The construction quality of the flexible waterproof layer is poor. including the construction of the base layer before the requirements were met, and the corners were not strengthened; Through-wall pipes, embedded parts.

Improper disposal of deformation seams and other parts, poor bonding between the coil and the lap of the coil, etc. The waterproof layer of the coating film adopts the construction method of external anti-internal brush, because the strength of the coating film is low, and the bond with the maintenance wall is firm, when the main structure settles, it is easy to crack the waterproof layer of the coating film and cause basement leakage. Backfill.

It contains garbage, broken bricks and other sundries, or is not compacted, does not form a waterproof curtain, and forms a catchment area around the basement, when there is a problem with the structure and waterproof layer, the basement leakage will occur.

The general underground structure self-discharge water is not able to meet the requirements of complete waterproofing, so an additional waterproof layer will be added, so whether the underground structure leaks depends on whether the additional waterproof layer is done. It is best to find a professional company to solve it for you. In the rainy season, due to continuous rain, it may cause leakage of the roof of the underground garage, and even damage the owner's motor vehicle, which will cause conflicts and disputes.

To this end, property service companies need to take the following measures to reduce the damage caused by rain and leakage in underground garages. Poor quality control of underground structure construction is one of the main reasons for the occurrence of water leakage in underground structures, and the bottom plate of underground structures is the weakest part of waterproofing.

After the subway is put into operation, the concrete structure will be affected by the double vibration disturbance of the above-ground car and the underground subway train, which makes the difficulty of subway leakage plugging much greater than that of civil underground engineering. Therefore, the leakage plugging of underground structure engineering must be comprehensively selected to ensure the overall leakage plugging effect of underground concrete structure in the vibration environment. Most of the traditional underground engineering plugging construction methods are used in civil underground engineering, and the use environment of these projects is static.

If the subway project is treated by this traditional method, it can only solve the problem in a short time, and the leakage may reappear after the subway has been operated for a period of time, or even worse. And then fall into a vicious circle of continuing to plug and leak. After long-term analysis and conclusion of subway plugging construction, the reason is that the operation and use environment factors such as vibration disturbance are not considered in the selection of plugging materials and construction technology.

The structure of water seepage is: infiltration (left and right knots) and water (single structure).

The structure of water seepage is: seepage (left and right structure) water (single structure). Pinyin is: shènshuǐ. The phonetic pronunciation is: The part of speech is: an adjective.

What is the specific explanation of water seepage, we will introduce it to you through the following aspects:

1. Explanation of terms [click here to view the details of the plan].

Seepage shènshuǐ. (1) False or exaggerated asset accounts that give an unrealistic book value to the share capital. (2) Oozing something, oozing water or sap from the cracked surface (e.g., in a tree).

2. Chinese dictionary.

Water leaks through the cracks of the object. For example, the house is in disrepair, and water seeps in when it rains. 」

3. Network Explanation.

When the high water level lasts for a long time during the flood season, the water in front of the embankment penetrates into the embankment under the action of seepage pressure, which is called seepage.

Synonyms about water seepage.

Water leakage and permeability. Words about water seepage.

leaker

Idioms about water seepage.

The water carries the boat, the water overturns the boat, the boat on the water, the river does not commit the river water, splashes the cold underwater boat.

Words about water seepage.

The launching boat and the overboard dog poured cold water on the water and separated the water boat.

Sentence formation about water seepage.

1. In addition, whether it is a new house or a second-hand house, the top of the wall, the corner of the wall, the eaves wall, and the corner of the window frame have the possibility of water seepage in rainy days.

2. After investigation, it was learned that the water seepage of the residents on the fourth floor was mainly due to the fact that the residents on the fifth floor had not been renovated, and the balcony of the house was not closed, and the ground generated water after the rainwater drifted into the balcony and penetrated into the fourth floor.

3. Cuttlefish have porous and permeable bones, which are originally composed of chalk and a small amount of soft matter.

4. The concrete of the anti-seepage panel of the dam of Changgang Reservoir is seriously aged, and there are many cracks and serious water seepage.

5. If the machine bureau is adjacent to the ship's ao, it is built with masonry and cement, and there is water seepage in the masonry joints.

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We'll be happy to answer your questions! Basement leakage causes: waterproofing is not done well, resulting in wall seepage, it is recommended to redo the waterproof expansion data basement due to its infiltration below the surface, close to the groundwater, and perennial lack of sunlight and old wind, the basic practice of basement ground moisture-proof, simply put, is to add a waterproof layer to the ground structure of the basement.

There are more complex protective measures such as thermal insulation layer, isolation layer, cement artesian level, etc., which are added above the waterproof layer. The simple basement moisture-proof only needs to cover the waterproof membrane on the surface in summer or directly spray the moisture-proof liquid on the potatoes to achieve the purpose of basement moisture-proof. Hope mine can help you!

The causes of basement leakage include design reasons, material reasons, construction reasons, etc.

1. When the developer is designing, if the basement bottom shirt is not waterproofed, or it is simply waterproofed, and the external wall is not waterproofed, because the whole sealing effect cannot be achieved, there will be water leakage.

2. This situation is relatively common, such as the inferior cement used by the construction unit, or the water or good mud is too low, which may become the cause of basement leakage, of course, it may also be because of improper material selection, it is recommended to find someone to check.

3. The foundation is not well treated, the construction quality of the waterproof layer is poor, the concrete construction quality is poor, the backfill contains sundries, and only the inner layer is waterproofed, etc., which will cause water leakage in the basement, and it will be more troublesome to deal with.

Prevent basement leaks

When building the basement wall, it is necessary to ensure the fullness of the masonry mortar and avoid leakage from the brick joints; Secondly, before plastering the inside and outside of the outer wall, the root should be cleaned to ensure that the root plastering is dense and in place, and if necessary, the yin corner of the outside of the wall and the foundation should be made into a figure-eight corner; Secondly, to ensure that the bottom elevation of the waterproof mortar on the outside of the wall is higher than the indoor elevation of the basement.

The pipeline passes through the wall hole in the basement, and after the pipeline is installed, it is smashed with dry hard cement mortar or plain cement around it, and then the waterproof mortar is smeared on the side, and after the waterproof mortar is dried, the polyurethane waterproof coating film is brushed twice in the range greater than the outer diameter of the pipeline 35mm.

After the installation of the pipe, the wall hole is smashed with asphalt hemp wire, and the outside of the wall is smeared with cement mortar, and the polyurethane cool waterproof membrane is also brushed twice.

For the water seepage at the scattered water part, the waterproof mortar of the exterior wall should be about 150mm higher than the scattered water or the top side of the foot should be done to ensure that the moisture-proof layer of the scattered water part is not opened, and the ointment joint at the scattered water and the foot should be filled; In order to ensure the moisture-proof effect and avoid water seepage, the basement wall must be built with cement mortar, and the ash joints must be full.

There may be many reasons for the leakage of the underground mausoleum sales room, and the common reason is that Zheng Kuo:

1.Infrastructure problems: The basement infrastructure may have defects, such as unstable foundations, foundation cracks, etc., resulting in water seepage in the basement walls.

2.High soil moisture: The soil moisture around the basement is high, the groundwater level rises, and the pressure is too high, resulting in water seepage in the basement.

3.Rainy weather: In rainy weather, the drainage system around the basement is not smooth, and the water flows too much, resulting in water seepage in the basement.

4.Leakage of water pipes: There may be leakage in the ruler pure comic pipes in the basement, resulting in water seepage in the basement walls.

5.Damaged waterproofing layer: The waterproofing layer of the basement is damaged or deteriorated, resulting in water seepage of the basement wall.

The common leakage parts of the basement are: the joint between the roof and the vertical wall, the joint between the floor and the wall, the wall pipe part, the deformation joint or the middle cover, the expansion joint, and the settlement joint. Although the parts are different, most of the basement leakage is due to the fact that the underground waterproofing is not in place, the lap edge of the waterproof membrane is not sealed, and the waterproof material is damaged, and the groundwater pressure is relatively large, resulting in the failure of the waterproof layer.

1. In terms of external factors, if the surface water (such as rainwater and domestic water) on the periphery of the building cannot be drained into the ground or the underground pipeline leaks in time, resulting in water seepage on the outer wall of the basement of the building for a long time;

2. Internal factors (the project itself):

1) water seepage at the root of the wall, mainly when the interior and exterior walls are plastered, the root part of the wall is not cleaned, resulting in the exterior wall waterproof mortar can not be wiped at the bottom or the wall root part is not densely plastered, and there is a gap between the interior wall plastering and the ground surface layer, which causes water seepage, especially when the elevation of the root of the wall is very close to the elevation of the basement indoor ground, this situation is more likely to occur; The water seepage at the shape joint is mainly due to the failure of the waterproof measures at the deformation joint, which causes the outdoor groundwater to enter the deformation joint and infiltrate into the basement from the walls on both sides of the joint;

2) The pipeline seepage through the outer wall is blocked by the reserved hole of the pipeline, and when the rain is more in the summer or when the pipeline leaks, the groundwater seeps into the room along the outer surface of the pipe wall; The leakage of the scattered water part of the exterior wall is due to the fact that the waterproof mortar on the outside of the exterior wall and the outdoor skirting part are lower than the loose water or the same level as the loose water, and the joint part is often not well connected, sometimes it cannot be connected, when the loose water cracks or the gap between the loose water and the strangled feet is not added with ointment, it will lead to water seepage in the basement in case of heavy rain;

3) The leakage of individual walls is due to the fact that the mortar is not full during the masonry of the wall, and the joints are formed between the masonry, and the rainwater seeps into the gaps.

The basement leakage repair needs to be done by professional waterproof master personnel, repair the basement leakage point, repair the basement leakage point, paint the wall with professional waterproof materials, and then open the water to do the waterproof test, be sure to ensure that there is no more leakage after maintenance.

There are many reasons why a basement leak can occur, and here are some of the common possible causes:

Unreasonable design: When building the basement, the foundation was not well designed, resulting in the high cracking of the skin of the foundation sinking wall, and the leakage of the basement.

Improper selection of materials: The waterproofing materials used in the construction of the basement are of substandard quality, or the waterproofing materials are not evenly painted, resulting in leakage in the basement.

Improper construction: When doing waterproofing, the construction is not carried out in accordance with the requirements, resulting in unqualified quality of the waterproof layer and water seepage.

Plumbing problems: Leaking pipes in the basement or bursting pipes causing leaks in the basement.

Other causes: including persistent rainfall, rising water tables,** and more.

If you encounter the problem of basement water leakage, it is recommended that you contact a professional basement water leak repair personnel for repair and repair.