Foundation stage waterproof protection layer construction method

Abstract

The invention relates to the technical field of building engineering, and discloses a foundation stage waterproof protection layer construction method which comprises the following steps: step 1, constructing a foundation raft cushion layer, constructing a waterproof layer, and pouring a planar waterproof protection layer after the waterproof layer construction is accepted and accepted by a supervision unit; secondly, brick forming die construction parts are adopted on the periphery of the foundation raft, and a batch of bricks are arranged on the top of a brick forming die for a top waterproof protection layer; thirdly, the bottom is filled with cement mortar, and cement pressure plates are laid in a staggered joint mode; fourthly, when the foundation raft has an inclined plane, the bottom is underlaid with cement mortar, the top is in lap joint with the plane through anti-crack mortar internal pressure gridding cloth, and it is guaranteed that the cement pressure plate does not fall off. Usually, 1: 2.5 cement mortar hanging nets are adopted for construction on the vertical face of the brick blank film and the vertical face of the bearing platform foundation, a 10 mm cement pressure plate is adopted, the strength is not smaller than 20 Mpa, the strength of a protection layer can be guaranteed, labor is greatly saved, the construction progress is accelerated, and construction is easy and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a waterproof protective layer construction method at a foundation stage. Background Art

[0002] At present, leakage prevention has become a quality issue that the construction industry pays great attention to. With the promulgation of new regulations, construction processes and acceptance standards are becoming more and more stringent. Usually, during the underground waterproofing construction stage, when SBS waterproofing membrane is used for construction, a waterproof protective layer needs to be constructed.

[0003] The construction of the flat protective layer is relatively simple, but the construction of the foundation pit slope, the pedestal facade, the brick formwork facade and other parts is more difficult. Usually, 1:2.5 cement mortar is used for painting or fine stone concrete is applied to the slope. However, when the foundation raft reinforcement is tied, the transportation of the reinforcement can easily cause damage to the protective layer, the protective layer to fall off, and even damage the waterproof layer, resulting in waterproof leakage. In addition, the construction speed is slow when painting 1:2.5 cement mortar or applying fine stone concrete during the implementation process, which delays the raft construction period. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for constructing a waterproof protective layer in the foundation stage, which solves the problem of waterproof membrane damage and leakage caused by the difficulty and shedding of the vertical and inclined waterproof protective layer during the foundation stage construction.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for constructing a waterproof protective layer in the basic stage, comprising the following steps:

[0006] Step 1: Before the construction of the foundation raft cushion layer, pre-treatment is carried out first, and then construction is carried out. After the construction is completed, the waterproof layer is constructed. After the waterproof layer construction is accepted by the supervision unit, the flat waterproof protective layer is poured;

[0007] Step 2: Brick membrane is used around the foundation raft. After the waterproof layer is constructed, a cement pressure plate is used. Cement mortar is used to prime the bottom of the inner side of the brick membrane. Then the cement pressure plate is placed in the mortar position. The height of the cement pressure plate is the same as the height of the brick membrane. A group of bricks are set on the top of the brick membrane for the top waterproof protection layer.

[0008] Step 3: During the construction of the foundation, when placing the cement pressure plate, cement mortar is used as the bottom pad, and the cement pressure plate is laid with staggered joints. The overlapping parts are reinforced with anti-cracking mortar, and the back of the cement pressure plate is constructed with cement adhesive in a frame point manner. When the construction reaches the plane height, the anti-cracking mortar internal pressure mesh cloth is used to overlap with the plane to ensure that the cement pressure plate does not fall off;

[0009] Step 4: When the foundation raft has an inclined surface, cement mortar is used as the bottom pad, and anti-cracking mortar internal pressure mesh cloth is used on the top to overlap with the plane to ensure that the cement pressure plate does not fall off.

[0010] Preferably, in step one, the pretreatment includes leveling the base, cleaning debris and stagnant water, and drying, cleaning and leveling the surface of the raft cushion layer, wherein the positive and negative corners of the raft cushion layer are polished into arcs, and the arcs are used to fit with the waterproof layer.

[0011] Preferably, in step three, the staggered laying of the cement pressure plate needs to ensure that the anti-cracking mortar reinforcement and internal pressure fiberglass mesh cloth treatment of the overlapped parts meet the requirements, and the cement pressure plate parts adopt the frame point bonding method.

[0012] Preferably, in step 4, the overlap of the slope-treated cement mortar bottom and the top anti-cracking mortar internal pressure mesh cloth needs to ensure that the cement pressure plate is stable.

[0013] Preferably, a foundation stage waterproof protective layer includes a waterproof layer, characterized in that: the lower outer wall of the waterproof layer is fixedly connected to a pedestal foundation cushion layer, the upper outer wall of the waterproof layer is fixedly connected to a concrete waterproof protective layer, the upper outer wall of the concrete waterproof protective layer is fixedly connected to a cement mortar pad, the inner wall of the cement mortar pad is provided with a cement pressure plate waterproof protective layer, the left outer wall of the cement pressure plate waterproof protective layer is fitted with the right outer wall of the waterproof layer, the right outer wall of the cement pressure plate waterproof protective layer is provided with a glass fiber mesh cloth, the left outer wall of the waterproof layer is fixedly connected to a pedestal brick membrane, and the lower surface of the pedestal brick membrane is fixedly connected to the upper surface of the pedestal foundation cushion layer.

[0014] The present invention provides a method for constructing a waterproof protective layer in the foundation stage. It has the following beneficial effects:

[0015] 1. The waterproof protective layer of the brick membrane facade, the foundation facade and the lower return column pier slope is difficult to implement during the underground waterproof construction stage. Usually, 1:2.5 cement mortar is used for mesh construction on the brick membrane facade and the foundation facade, and fine stone concrete is used for the slope. This method is easy to cause insufficient strength of the waterproof protective layer, shedding and damage to the coiled material, and the construction period is long, which wastes a lot of labor. The present invention adopts a 10mm cement pressure plate with a strength of not less than 20Mpa, which can not only ensure the strength of the protective layer, but also greatly save labor, speed up the construction progress, and is simple and convenient to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the present invention;

[0017] Figure 2 It is a flow chart of the foundation raft construction of the present invention;

[0018] Figure 3 It is a schematic diagram of the brick mold parts of the present invention;

[0019] Figure 4 It is a schematic diagram of the splicing method of the vertical surface of the pedestal of the present invention;

[0020] Figure 5 It is a schematic diagram of the bonding method of the vertical surface of the pedestal according to the present invention;

[0021] Figure 6 A schematic diagram of a support platform of the present invention;

[0022] Figure 7 It is a schematic diagram of the method of making the inclined surface of the present invention.

[0023] Among them, 1. Waterproof layer; 2. Capping foundation cushion layer; 3. Concrete waterproof protective layer; 4. Cement mortar base; 5. Capping brick membrane; 6. Cement pressure plate waterproof protective layer; 7. Fiberglass mesh cloth. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example:

[0026] Please see attached Figure 1 -Attached Figure 7 The embodiment of the present invention provides a method for constructing a waterproof protective layer in the foundation stage, comprising the following steps:

[0027] Step 1: Before the construction of the foundation raft cushion layer, pre-treatment is carried out first, and then construction is carried out. After the construction is completed, the waterproof layer is constructed. After the waterproof layer construction is accepted by the supervision unit, the flat waterproof protective layer is poured;

[0028] Step 2: Brick membrane is used around the foundation raft. After the waterproof layer is constructed, a cement pressure plate is used. Cement mortar is used to prime the bottom of the inner side of the brick membrane. Then the cement pressure plate is placed in the mortar position. The height of the cement pressure plate is the same as the height of the brick membrane. A group of bricks are set on the top of the brick membrane for the top waterproof protection layer.

[0029] Step 3: During the construction of the foundation, when placing the cement pressure plate, cement mortar is used as the bottom pad, and the cement pressure plate is laid with staggered joints. The overlapping parts are reinforced with anti-cracking mortar, and the back of the cement pressure plate is constructed with cement adhesive in a frame point manner. When the construction reaches the plane height, the anti-cracking mortar internal pressure mesh cloth is used to overlap with the plane to ensure that the cement pressure plate does not fall off;

[0030] Step 4: When the foundation raft has an inclined surface, cement mortar is used as the bottom pad, and anti-cracking mortar internal pressure mesh cloth is used on the top to overlap with the plane to ensure that the cement pressure plate does not fall off.

[0031] In step one, the pretreatment includes leveling the base, clearing debris and accumulated water, and drying, cleaning and leveling the surface of the raft cushion layer. The corners of the raft cushion layer are polished with arcs, which are used to fit the waterproof layer.

[0032] Specifically, first of all, we need to ensure that the surface of the base is clean and flat, clean up the debris, dust, oil, etc. on the surface of the base, and for uneven parts, such as raised parts, they need to be chiseled flat, and sunken parts need to be filled. For example, on the surface of the concrete foundation, if there are wood chips, cement residues, etc. left during the construction process, they need to be swept with a broom and then rinsed with clean water.

[0033] The base needs to be dry to a certain degree. It can be dried by natural ventilation or using drying equipment. If the moisture content of the base is too high, it will affect the bonding effect of the waterproof layer. The moisture content of the concrete base should be controlled at no more than 6%.

[0034] Check the base layer to see if there are any defects such as cracks and holes. Small cracks can be filled with caulking agent. Large holes may need to be repaired with cement mortar. Cracks with a width of less than 0.2mm can be filled with special elastic sealant.

[0035] In step 2, the thickness of the cement pressure plate is 10mm, and its compressive strength is ≥20Mpa. The cement pressure plate is placed on the part primed with cement mortar, and the joint part is treated with anti-cracking mortar and the internal pressure is not less than 300mm wide glass fiber mesh cloth.

[0036] Specifically, the certain thickness and high compressive strength of the cement pressure plate enable it to bear a certain load in the building structure, providing stable support for subsequent construction and use.

[0037] Placed in the cement mortar base, it is tightly bonded to the base layer, which helps to improve the stability and durability of the overall structure.

[0038] The joints are treated with anti-crack mortar and internally pressed with fiberglass mesh cloth, which can effectively prevent cracks caused by temperature changes, shrinkage, etc., and ensure the integrity of the structure.

[0039] In step three, the staggered laying of cement pressure plates must ensure that the anti-cracking mortar reinforcement and internal pressure fiberglass mesh cloth treatment of the overlapped parts meet the requirements, and the frame point bonding method is adopted for the cement pressure plate parts.

[0040] Specifically, staggered laying can avoid stress concentration on the same straight line, making the structural layer formed by the cement pressure plate more evenly stressed. When subjected to external pressure and vibration, the staggered method can disperse the pressure more effectively throughout the plate structure, thereby enhancing the overall bearing capacity.

[0041] If the paving method is through-seam, once a crack appears in a certain place, it is easy to extend along the direction of the crack, resulting in a large area of ​​cracks. However, staggered paving can effectively prevent the cracks from penetrating and improve the anti-crack performance of the structure.

[0042] Reinforcement with anti-crack mortar can enhance the crack resistance of the overlapped parts. Because the overlapped parts of cement pressure plates are prone to stress concentration and cracks due to the discontinuity of materials and slight differences in the construction process. Anti-crack mortar can fill these tiny gaps, and it has certain anti-crack properties, which can effectively prevent the occurrence of cracks.

[0043] Internal pressure fiberglass mesh can strengthen the bonding force between the anti-crack mortar and the cement pressure plate. The fiberglass mesh has high tensile strength, which can form a reinforced skeleton structure inside the anti-crack mortar, making the anti-crack mortar less likely to crack when subjected to tension, and can also better connect the cement pressure plate together.

[0044] The frame point bonding method can ensure good bonding between the cement pressure plate and the base or other structures while avoiding problems such as hollowing and deformation that may be caused by the use of adhesives over a large area. By bonding at the edges and key points of the plate, the cement pressure plate can be accurately positioned so that it is firmly fixed in the predetermined position. This bonding method can also play a stress buffering role to a certain extent. When the cement pressure plate is slightly deformed by external forces, the frame point bonding can allow the plate to move within a certain range, reducing the internal stress caused by deformation, thereby reducing the risk of cracking of the plate.

[0045] In step 4, the cement mortar base with slope treatment and the top anti-cracking mortar internal pressure mesh cloth must be overlapped to ensure that the cement pressure plate is stable.

[0046] Specifically, after the slope is processed, the cement mortar pad can provide a flat and stable foundation for the cement pressure plate. It can fill the uneven part of the slope, making the cement pressure plate more stable when placed on it and evenly bear the pressure.

[0047] Enhance adhesion: The cement mortar can form a certain bonding force with the inclined surface and the cement pressure plate, which increases the bonding strength between the cement pressure plate and the inclined surface and prevents the cement pressure plate from sliding or shifting on the inclined surface.

[0048] The function of top anti-crack mortar internal pressure mesh cloth:

[0049] The anti-crack mortar on the top can effectively resist cracks caused by temperature changes, structural deformation, etc. The internal pressure mesh cloth further enhances the tensile strength of the anti-crack mortar, preventing cracks from appearing on the top and extending to the cement pressure plate, thereby protecting the integrity of the cement pressure plate.

[0050] The combination of anti-crack mortar and mesh cloth forms a good overlap with the cement pressure plate, which plays a role of connection and reinforcement. They tightly combine the cement pressure plate with the top of the slope, increasing the stability and integrity of the entire structure.

[0051] After step 4, step 5 is carried out to carry out the construction of the steel bar binding of the foundation raft slab. The specifications, models and quantity of the steel bars of the foundation raft slab should be consistent with the design drawings, and the connection method of the steel bars should meet the specification requirements of the construction drawings. Specifically, the position line of the steel bars is popped up on the waterproof protective layer or cushion layer, including the main bars and distribution bars of the foundation raft slab, to ensure that the position of the steel bar binding is accurate. The main bars of the foundation raft slab are first tied according to the position line. The spacing and row spacing of the main bars must meet the design requirements. The binding wire is used for binding. The binding must be firm and must not be loose. After the main bars are tied, the distribution bars are tied. The distribution bars must be perpendicular to the main bars, and the binding method is the same as the main bars. For longer steel bars, connection is required. Welding, mechanical connection or binding connection can be used. The connection method must meet the design and specification requirements to ensure reliable connection quality. For the corners, post-casting strips and other parts of the foundation raft slab, the steel bars must be strengthened according to the design requirements, the number or specifications of the steel bars must be increased, and the seismic and crack resistance of the structure must be improved. During the steel bar binding process, attention should be paid to protecting the waterproof layer and the waterproof protective layer to prevent the steel bars from piercing the waterproof layer or damaging the protective layer.

[0052] Please see attached Figure 7 A foundation stage waterproof protective layer includes a waterproof layer 1, the lower outer wall of the waterproof layer 1 is fixedly connected to a cap foundation cushion layer 2, the upper outer wall of the waterproof layer 1 is fixedly connected to a concrete waterproof protective layer 3, the upper outer wall of the concrete waterproof protective layer 3 is fixedly connected to a cement mortar pad 4, the inner wall of the cement mortar pad 4 is provided with a cement pressure plate waterproof protective layer 6, the left outer wall of the cement pressure plate waterproof protective layer 6 is fitted with the right outer wall of the waterproof layer 1, the right outer wall of the cement pressure plate waterproof protective layer 6 is provided with a glass fiber mesh cloth 7, the left outer wall of the waterproof layer 1 is fixedly connected to a cap brick membrane 5, and the lower surface of the cap brick membrane 5 is fixedly connected to the upper surface of the cap foundation cushion layer 2.

[0053] Specifically, the waterproof layer 1 is used to waterproof the foundation cushion 2 and the foundation brick membrane 5, and a concrete waterproof protective layer 3 is laid on the waterproof layer 1. During construction, because the foundation foundation is higher than the brick membrane, a cement mortar pad 4 is laid under the fiberglass mesh cloth 7 to increase the height of the fiberglass mesh cloth 7 to be parallel to the foundation brick membrane 5, and a cement pressure plate waterproof protective layer 6 is arranged between the fiberglass mesh cloth 7 and the cement mortar pad 4. The bottom is padded with cement mortar 4, and cement pressure plates are laid with staggered joints. The overlapping parts are reinforced with anti-cracking mortar and treated with glass fiber mesh cloth 7 with an internal pressure width of not less than 300. The back of the cement pressure plate is constructed in a frame-point manner using cement adhesive. When the construction reaches the plane height, the anti-cracking mortar internal pressure mesh cloth is overlapped with the plane to ensure that the cement pressure plate does not fall off. When the foundation raft slab has an inclined surface, the bottom is padded with cement mortar, and the top is overlapped with the plane with an anti-cracking mortar internal pressure mesh cloth to ensure that the cement pressure plate does not fall off. Finally, the foundation raft slab reinforcement binding construction is carried out.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for constructing a waterproof protective layer in the foundation stage, characterized in that: The following steps are involved: Step 1: Before the construction of the foundation raft cushion layer, pre-treatment is carried out first, and then construction is carried out. After the construction is completed, the waterproof layer is constructed. After the waterproof layer construction is accepted by the supervision unit, the flat waterproof protective layer is poured; Step 2: Brick membrane is used around the foundation raft. After the waterproof layer is constructed, a cement pressure plate is used. Cement mortar is used to prime the bottom of the inner side of the brick membrane. Then the cement pressure plate is placed in the mortar position. The height of the cement pressure plate is the same as the height of the brick membrane. A group of bricks are set on the top of the brick membrane for the top waterproof protection layer. Step 3: During the construction of the foundation, when placing the cement pressure plate, cement mortar is used as the bottom pad, and the cement pressure plate is laid with staggered joints. The overlapping parts are reinforced with anti-cracking mortar, and the back of the cement pressure plate is constructed with cement adhesive in a frame point manner. When the construction reaches the plane height, the anti-cracking mortar internal pressure mesh cloth is used to overlap with the plane to ensure that the cement pressure plate does not fall off; Step 4: When the foundation raft has an inclined surface, cement mortar is used as the bottom pad, and anti-cracking mortar internal pressure mesh cloth is used on the top to overlap with the plane to ensure that the cement pressure plate does not fall off.

2. A method for constructing a waterproof protective layer at the foundation stage according to claim 1, characterized in that: In step one, the pretreatment includes leveling the base, cleaning up debris and accumulated water, and drying, cleaning and leveling the surface of the raft cushion layer, wherein the positive and negative corners of the raft cushion layer are polished into arcs, which are used to fit with the waterproof layer.

3. A method for constructing a waterproof protective layer at the foundation stage according to claim 1, characterized in that: In step 2, the thickness of the cement pressure plate is 10 mm, and its compressive strength is ≥ 20 MPa. The cement pressure plate is placed on a part primed with cement mortar, and the joint part is treated with anti-cracking mortar and the internal pressure is not less than 300 mm wide glass fiber mesh cloth.

4. A method for constructing a waterproof protective layer at the foundation stage according to claim 1, characterized in that: In step three, the anti-cracking mortar reinforcement and internal pressure fiberglass mesh cloth treatment of the staggered laying overlap parts of the cement pressure plate meet the requirements, and the cement pressure plate parts adopt the frame point bonding method.

5. A method for constructing a waterproof protective layer at the foundation stage according to claim 1, characterized in that: In step 4, the slope-treated cement mortar bottom and the top anti-cracking mortar internal pressure mesh cloth are overlapped to stabilize the cement pressure plate.

6. A method for constructing a waterproof protective layer in the basic stage according to any one of claims 1 to 5, characterized in that: The protective layer comprises a waterproof layer (1), the lower outer wall of the waterproof layer (1) is fixedly connected to a cap foundation cushion layer (2), the upper outer wall of the waterproof layer (1) is fixedly connected to a concrete waterproof protective layer (3), the upper outer wall of the concrete waterproof protective layer (3) is fixedly connected to a cement mortar pad (4), the inner wall of the cement mortar pad (4) is provided with a cement pressure plate waterproof protective layer (6), the left outer wall of the cement pressure plate waterproof protective layer (6) is in contact with the right outer wall of the waterproof layer (1), the right outer wall of the cement pressure plate waterproof protective layer (6) is provided with a glass fiber mesh cloth (7), the left outer wall of the waterproof layer (1) is fixedly connected to a cap brick membrane (5), and the lower surface of the cap brick membrane (5) is fixedly connected to the upper surface of the cap foundation cushion layer (2).

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