Method for repairing water infiltration in a basement elevator pit

Abstract

The present application relates to elevator shaft construction technology field, specifically speaking is a basement elevator pit water seepage repair method, steps as follows: the structure surface layer is removed, and a water collecting pit is chiseled at the bottom of the foundation pit; The guide plate is laid on the bottom of the foundation pit and fixed; The leveling layer is laid, when the mortar initial setting of the leveling layer is completed, the water collecting pit cover plate is covered on the top of the water collecting pit, and the water collecting pit cover plate is pressed into the leveling layer around; The water in the water collecting pit is pumped out by the water pumping equipment, the dry cement powder is injected into the water collecting pit, the water collecting pit cover plate is sealed by the sealing cover, the leveling of the water collecting pit hole is carried out, and the waterproof layer is laid; The present application sets the guide plate and the water collecting pit, so that the water seepage is collected to the water collecting pit along the lower side of the guide plate, the excessive pressure of the water seepage point can be avoided when the strength of the leveling layer is not reached, the un-solidified leveling layer is damaged, and the repair failure is caused; The water seepage in the construction process is pumped out by the water collecting pit, the damp of the bottom of the elevator pit caused by the water seepage is avoided, and the construction quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of elevator shaft construction technology, specifically a method for repairing water seepage in basement elevator pits. Background Technology

[0002] During the construction of building foundations, groundwater may seep out along the basement floor slab under pressure due to defects in materials and construction techniques. Since the bottom of the elevator shaft is located at the basement floor slab, its elevation is often the lowest point of the building, making it most likely to leak. Currently, grouting or mortar sealing is often used for repairs, but due to the small amount of water seepage in the floor slab and its overall dampness, it is difficult to locate the seepage point, making grouting ineffective. When using cement mortar for repairs, the cement mortar is difficult to solidify quickly due to the high pressure at the seepage point, allowing water to continue to seep out, thus causing the repair to fail. Because the bottom is damp, adding a waterproof layer directly to the bottom cannot bond well with the foundation, and water will continue to seep out after long-term use. Therefore, there is an urgent need for a method to effectively prevent water seepage in the basement elevator pit, which can be used for a long time after construction and ensures a good sealing effect. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for repairing water seepage in basement elevator pits that can effectively repair floor seepage, prevent the accumulation of large amounts of silt and sewage in elevator shafts due to water seepage, and ensure the normal operation of elevators.

[0004] The technical solution adopted by this invention to solve its technical problem is: A method for repairing water seepage in basement elevator pits includes the following steps: S1, Chisel away the structural surface layer: Remove the surface layer of the structural surface layer in the leaking foundation pit, and at the same time, chisel out a water collection pit at an appropriate position at the bottom of the foundation pit. S2, Deflector Plate Installation: Lay the deflector plates at the bottom of the pit and fix them in place; S3, Leveling layer laying: Lay a leveling layer on the guide plate and smooth the surface of the leveling layer; when laying the leveling layer, leave space at the opening of the sump pit; at the same time, when laying the corner, lay the corner in an arc shape with a radius of not less than 50mm. S4, Install the sump cover: The sump cover is slightly larger than the cross-sectional size of the sump, and the sump cover is provided with a water pumping hole through which the water supply and drainage pipes pass; when the leveling layer has just been laid and the mortar has just begun to set, place the sump cover on top of the sump, and press the sump cover into the leveling layer around its perimeter. S5, Draining water pit and injecting dry cement powder: Use pumping equipment to pump out and drain the water in the water pit, and then inject dry cement powder into the water pit through the pumping hole. After completion, seal the through hole with a sealing cap that matches the size of the pumping hole, and then level the opening of the water pit with mortar. S6, Waterproof layer laying: After the leveling layer reaches the required strength, the waterproof layer is laid on top.

[0005] Preferably, in step S6, when laying the waterproof layer, a rigid waterproof layer is used in areas without vibration, mainly waterproof mortar or waterproof fine stone concrete; in vibrating areas, waterproof membrane or waterproof coating is used, and the waterproof membrane is laid tightly against the leveling layer.

[0006] Preferably, it also includes S7, protective layer laying: no protective layer is required on the rigid waterproof layer. After the waterproof membrane is laid and passes inspection, a protective layer is laid on top. The protective layer is laid with fine stone concrete or mortar.

[0007] Preferably, in step S1, the chiseled structural surface layer should be sloped downwards towards the side closest to the sump.

[0008] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: This invention, by setting up a guide plate and a sump, directs seepage water along the lower side of the guide plate to the sump. This avoids excessive pressure at the seepage point before the leveling layer has reached its strength, which could damage the uncured leveling layer and lead to repair failure. The sump also removes water that seeps out during construction, preventing dampness at the bottom of the elevator pit and ensuring construction quality. This method reduces the likelihood of recurring seepage after repair, effectively controlling elevator shaft seepage and extending the service life of the elevator shaft. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of the elevator pit seepage repair structure in an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged structural diagram at point A; Figure 3 yes Figure 1 Enlarged structural diagram at point B; Figure 4 This is a schematic diagram of the structure of the guide plate in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a water collection pit cover according to an embodiment of the present invention; Figure 6 This is a schematic diagram of another water collection pit cover in an embodiment of the present invention.

[0010] Explanation of reference numerals in the attached drawings: 1. Guide plate; 101. Anchor hole; 102. Connection hole; 103. Sump hole; 2. Anchor nail; 3. Leveling layer; 4. Waterproof layer; 5. Protective layer; 6. Sump cover plate; 601. Sealing cover; 602. Anchor tooth; 7. Sump; 8. Original concrete structure of elevator pit; 9. Soil and rock layer. Detailed Implementation

[0011] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0012] like Figures 1 to 6 As shown in the figure, this embodiment provides a method for repairing water seepage in a basement elevator pit, including the following steps: S1, Chisel away the structural surface layer: Remove the surface layer of the structural surface layer in the leaking foundation pit. At the same time, chisel out a sump 7 at an appropriate position at the bottom of the foundation pit. The chiseled structural surface layer should be sloped downwards towards the side closer to the sump 7, with an inclination of 3°-5°. The purpose of the sump 7 is to temporarily collect the seepage water in the sump 7 for easy drainage. The sump 7 should not be too large, and its diameter should not exceed 300mm, just enough to facilitate the drainage of water with a water pump. The surface layer of the structural layer is removed within the leaking foundation pit. This serves two purposes: first, to remove loose concrete from the surface, preventing segregation between structural layers after later repairs, which would reduce the strength of the main structure and affect the building's service life; and second, to lower the structural elevation, which would facilitate the fabrication of the waterproof layer 4.

[0013] S2, Installation of Guide Plate 1: The guide plate 1 is laid at the bottom of the pit and fixed. The guide plate 1 is made of thin sheet material, preferably plastic sheet material. Anchor holes 101, connecting holes 102 and sump holes 103 are provided on it. The connecting holes 102 are used to connect the leveling layer 3 with the original structure at the bottom of the pit. The anchor holes 101 are used for anchoring the anchor nails 2. The guide plate 1 is fixed to the bottom of the pit by the anchor nails 2. The size of the sump hole 103 is slightly smaller than that of the sump 7, so that during the repair, water seepage from the bottom plate of the pit can flow along the non-hole part of the guide plate 1 into the sump 7. The laying spacing of the guide plate 1 should be reasonable to ensure that it is firm and reliable, and the guide plate should not arch or shift. The anchor nails 2 can be expansion bolts or cement nails. Their main function is to anchor the guide plate 1 to the bottom plate structure of the elevator pit to prevent the guide plate 1 from moving or arching during the repair process, which would damage the upper structure of the guide plate 1.

[0014] S3, Leveling layer 3 installation: A leveling layer 3 is laid on the guide plate 1. The leveling layer 3 is mainly used for leveling the waterproof layer 4. Cement mortar is used, and the surface of the leveling layer 3 is smoothed. When laying the leveling layer 3, the opening of the sump 7 is reserved. At the same time, when laying at the corner, such as Figure 1 The corners are laid in an arc shape with a radius of not less than 50mm; during the laying of leveling layer 3, the water collection pit 7 is drained simultaneously until leveling layer 3 reaches the strength requirements.

[0015] S4, Install the sump cover plate 6: The size of the sump cover plate 6 is slightly larger than the cross-sectional size of the sump 7. The sump cover plate 6 is provided with a water pumping hole through which the water supply and drainage pipes pass. When the leveling layer 3 has just been laid and the mortar has just begun to set, cover the top of the sump 7 with the sump cover plate 6 and press the sump cover plate 6 into the leveling layer 3 around its perimeter. Specifically, the sump cover plate has structure 6: such as... Figure 5 The sump cover 6 has a threaded drainage hole in the middle, with a diameter not exceeding 50mm, for use with a threaded sealing cap 601; Structure 2, such as Figure 6 The sump cover 6 has a protruding water extraction hole in the middle, which is used in conjunction with the cap-shaped sealing cover 601; in order to facilitate the combination of the sump cover 6 and the leveling layer 3, an anchoring tooth 602 is provided on the lower side of the outer edge of the sump cover 6.

[0016] S5, Draining water in sump 7 and injecting dry cement powder: Use a pumping device to pump out and drain the water in sump 7, and then inject dry cement powder into sump 7 through the pumping hole. After completion, seal the through hole with a sealing cap 601 that matches the size of the pumping hole, and then level the opening of sump 7 with mortar.

[0017] S6, Waterproof layer 4 is laid after the leveling layer 3 has reached the required strength. When laying the waterproof layer 4, a rigid waterproof layer 4 is used in non-vibration areas, mainly waterproof mortar or waterproof fine stone concrete. In vibration areas, waterproof membrane or waterproof coating is used, and the waterproof membrane is laid tightly against the leveling layer 3. Among them, non-vibration areas refer to areas where no vibration equipment is used during construction, and vibration areas refer to areas where a certain vibration equipment is used during construction.

[0018] S7, laying of protective layer 5: No protective layer 5 needs to be laid on the rigid waterproof layer 4. After the waterproof membrane 4 is laid and inspected and approved, a protective layer 5 is laid on top. The protective layer 5 is laid with fine stone concrete or mortar.

[0019] This invention, by setting up a guide plate and a sump, directs seepage water along the lower side of the guide plate to the sump. This avoids excessive pressure at the seepage point before the leveling layer has reached its strength, which could damage the uncured leveling layer and lead to repair failure. The sump also removes water that seeps out during construction, preventing dampness at the bottom of the elevator pit and ensuring construction quality. This method reduces the likelihood of recurring seepage after repair, effectively controlling elevator shaft seepage and extending the service life of the elevator shaft.

[0020] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for repairing water seepage in a basement elevator pit, characterized in that, Includes the following steps: S1, chiseling the structural surface layer: remove the surface layer of the structural surface layer in the leaking foundation pit, and at the same time, chisel out a water sump at an appropriate position at the bottom of the foundation pit; in step S1, the chiseled structural surface layer should be sloped downwards towards the side close to the water sump. S2, Deflector Plate Installation: Deflector plates are laid at the bottom of the foundation pit and fixed; anchor holes, connection holes and sump holes are set on them. Connection holes are used to connect the leveling layer with the original structure at the bottom of the foundation pit. Anchor holes are used for anchoring with anchor nails. The deflector plates are fixed at the bottom of the foundation pit by anchor nails. The size of the sump holes is slightly smaller than that of the sump. S3, Leveling layer laying: Lay a leveling layer on the guide plate and smooth the surface of the leveling layer; when laying the leveling layer, leave space at the opening of the sump pit; at the same time, when laying the corner, lay the corner in an arc shape with a radius of not less than 50mm. S4, Install the sump cover: The sump cover is slightly larger than the cross-sectional size of the sump, and the sump cover is provided with a water pumping hole through which the water supply and drainage pipes pass; when the leveling layer has just been laid and the mortar has just begun to set, place the sump cover on top of the sump, and press the sump cover into the leveling layer around its perimeter. S5, Draining water pit and injecting dry cement powder: Use pumping equipment to pump out and drain the water that seeps out in the water pit during construction, and then inject dry cement powder into the water pit through the pumping hole. After completion, seal the through hole with a sealing cap that matches the size of the pumping hole, and then level the opening of the water pit with mortar. S6, Waterproof layer laying: After the leveling layer reaches the required strength, the waterproof layer is laid on top.

2. The method for repairing water seepage in basement elevator pits according to claim 1, characterized in that: In step S6, when laying the waterproof layer, a rigid waterproof layer is used in areas without vibration, and waterproof mortar or waterproof fine stone concrete is selected; in vibrating areas, waterproof membrane or waterproof coating is used, and the waterproof membrane is laid tightly against the leveling layer.

3. The method for repairing water seepage in the basement elevator pit according to claim 2, characterized in that: It also includes S7, protective layer laying: no protective layer is required on the rigid waterproof layer. After the waterproof membrane is laid and inspected and approved, a protective layer is laid on top. The protective layer is laid with fine stone concrete or mortar.

Images