A cushion water seepage treatment structure of an elevator shaft

Abstract

A seepage treatment structure for the foundation layer of an elevator shaft includes a temporary sump with a corrugated pipe installed inside. The bottom of the temporary sump is made of concrete as a foundation layer, and a pressure-bearing steel plate is installed on top. The connection between the pressure-bearing steel plate and the temporary sump is sealed tightly with sealant. A drain pipe and an observation hole are opened on the pressure-bearing steel plate. The bottom of the drain pipe is connected to a water pump, which is placed inside the corrugated pipe and rests on the concrete foundation layer. A vertical steel cap clamp is installed at the bottom of the pressure-bearing steel plate at the drain pipe location, and a concrete self-weight counter-pressure steel cap is installed at the top of the drain pipe location. A post-applied waterproof layer is laid on the surface of the concrete self-weight counter-pressure steel cap. This waterproof design, being a pre-laid, reverse-adhesive waterproof structure, eliminates the need for a separate waterproof protective layer, saving construction time. However, care must be taken to avoid damaging the waterproofing during rebar tying; any damage should be repaired promptly to prevent leakage.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a structure for treating water seepage in the foundation layer of an elevator shaft. Background Technology

[0002] During the excavation of the temporary sump pit, some poor geological conditions caused water and sand to surge into the foundation. This was resolved by setting up dewatering wells or using double-liquid grouting to seal the pit and lower the groundwater level.

[0003] However, during the pouring of the foundation layer at the bottom of the pit, localized seepage often occurs in multiple locations, leading to seepage and even small-scale water surges after the foundation layer is formed. General sealing methods are ineffective in isolating the groundwater level, and in some areas with pressurized water heads, drainage can only be achieved through diversion. General sealing measures are generally ineffective in stopping the leaks.

[0004] This resulted in a large amount of water accumulating on the foundation surface, making it impossible to carry out subsequent waterproofing work. To solve this problem, the project team adopted a drainage system based on the actual site conditions. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the present invention provides a seepage treatment structure for the foundation layer of an elevator shaft.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A seepage treatment structure for the foundation layer of an elevator shaft includes a temporary sump 5 with a corrugated pipe 6 installed inside. The bottom of the temporary sump 5 is constructed of concrete as a concrete foundation layer 7, and a pressure-bearing steel plate 2 is installed on top of the temporary sump 5. The connection between the pressure-bearing steel plate 2 and the temporary sump 5 is sealed tightly with sealant 3. A drain pipe 22 and an observation hole 23 are connected to the pressure-bearing steel plate 2. The bottom of the drain pipe 22 is connected to a water pump 8, which is placed inside the corrugated pipe 6 and rests on the concrete foundation layer 7. A vertical steel cap clamp 24 is installed at the bottom of the pressure-bearing steel plate 2 at the location of the drain pipe 22, and a concrete self-weight counter-pressure steel cap 25 is installed at the top of the location of the drain pipe 22. A post-construction waterproof layer 26 is laid on the surface of the concrete self-weight counter-pressure steel cap 25.

[0007] This utility model also has the following additional technical features: As a further specific optimization of the technical solution of this utility model: a pressure-bearing steel plate 2 is provided on the drainage trench 1 of the pad layer, and the connection between the pressure-bearing steel plate 2 and the drainage trench 1 of the pad layer is sealed tightly with sealant 3. A waterproof layer 4 is coated on the surface of the pressure-bearing steel plate 2 for tight sealing.

[0008] As a further specific optimization of the technical solution of this utility model: a temporary support leg 21 is welded to the bottom of the pressure-bearing steel plate 2, and the temporary support leg 21 extends into the corrugated pipe 6 and is placed on the concrete pad 7 for support.

[0009] As a further specific optimization of the technical solution of this utility model: a 60mm hole is opened on the pressure-bearing steel plate 2 to connect the drain pipe 22, and another 50mm hole is opened to connect the steel pipe as an observation hole 23.

[0010] Compared with the prior art, the advantages of this utility model are: Because this utility model's waterproof design is a pre-laid reverse-adhesive waterproof structure, it eliminates the need for a separate waterproof protective layer, thus saving construction time. However, care must be taken to avoid damaging the waterproof structure during the reinforcement binding process. If any damage occurs, repairs should be arranged as soon as possible to prevent leaks. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the drainage channel 1 of the pad layer of this utility model; Figure 2 This is a schematic diagram of the temporary water collection pit 5 of this utility model; Figure 3 This is a schematic diagram of the pressure-bearing steel plate 2 of this utility model; Figure 4 This is a schematic diagram of the post-construction waterproofing structure of the temporary water collection pit 5 of this utility model.

[0012] Explanation of reference numerals in the attached drawings: 1. Drainage trench of the foundation layer; 2. Pressure-bearing steel plate; 3. Sealant; 4. Waterproof layer; 5. Temporary sump; 6. Corrugated pipe; 7. Concrete foundation layer; 8. Water pump. Detailed Implementation

[0013] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. Example

[0014] A seepage treatment structure for the foundation layer of an elevator shaft includes a corrugated pipe 6 installed inside a temporary sump 5, a concrete foundation layer 7 at the bottom of the temporary sump 5, a pressure-bearing steel plate 2 installed on the top of the temporary sump 5, and a sealant 3 used to tightly seal the connection between the pressure-bearing steel plate 2 and the temporary sump 5.

[0015] A 60mm hole is made in the pressure-bearing steel plate 2 to connect the drain pipe 22, and another 50mm hole is made to connect the steel pipe as an observation hole 23.

[0016] Temporary support legs 21 are welded to the bottom of the pressure-bearing steel plate 2. The temporary support legs 21 extend into the corrugated pipe 6 and are placed on the concrete pad 7 for support.

[0017] The bottom of the drain pipe 22 is connected to the water pump 8, which is placed inside the corrugated pipe 6 and rests on the concrete pad 7. A vertical steel cap clamp 24 is installed at the bottom of the pressure-bearing steel plate 2 at the location of the drain pipe 22, and a concrete self-weight counter-pressure steel cap 25 is installed at the top of the location of the drain pipe 22. A post-applied waterproof layer 26 is laid on the surface of the concrete self-weight counter-pressure steel cap 25.

[0018] A pressure-bearing steel plate 2 is installed on the drainage trench 1 of the foundation layer, and the connection between the pressure-bearing steel plate 2 and the drainage trench 1 of the foundation layer is sealed tightly with sealant 3. A waterproof layer 4 is coated on the surface of the pressure-bearing steel plate 2 for tight sealing. Example

[0019] A method for treating water seepage in the foundation layer of a temporary sump pit in an elevator shaft: Step 1: Clean the mud and sand in the temporary sump pit 5, remove the construction waste and mud and sand from the bottom of the pit until the surface of the original concrete foundation is exposed.

[0020] Part Two: Locate the seepage point on the bottom surface of the original concrete foundation, then dig a trench in the original concrete foundation to divert the seepage point to the temporary sump 5, and pump the seepage water out of the pit using the water pump 8.

[0021] Step 3: Install a pressure-bearing steel plate 2 on the drainage trench 1 of the subgrade, seal it tightly with sealant 3 and waterproof layer 4, and then carry out surface waterproofing construction to ensure that there is no standing water on the surface of the subgrade. The trench depth is determined according to the amount of seepage, and it should be as deep as possible but not too wide.

[0022] Step 4: Construction of temporary sump 5. Select a corrugated pipe 6 with a suitable diameter as temporary sump 5 according to the amount of seepage on site. The diameter should be less than 600mm as much as possible. The depth can be adjusted. The bottom is made of concrete as a concrete pad 7.

[0023] Step 5: Set up a cover for the temporary sump 5, using a 4mm thick pressure-bearing steel plate 2 as the sealing material, and weld temporary support legs 21 at the bottom, which are placed on the concrete pad 7 for support. Make a 60mm hole in the pressure-bearing steel plate 2 and connect it to the drainage pipe 22, and make another 50mm hole and connect it to the steel pipe as an observation hole 23.

[0024] The observation port is set up to observe the water level of the temporary sump 5. When the temporary water level is too high, the water pump 8 can be turned on to pump water. When the water level is low, the water pump 8 can be turned off to prevent the water pump 8 from burning out due to dry pumping. At the same time, a 60mm hole is opened at the water outlet and a 50mm drain pipe is used. The reserved hole must be larger than the diameter of the drain pipe. After the waterproof sealing is completed, the inside and outside will be a sealed space. The reserved hole gap is to allow air to circulate inside and outside, to avoid pressure difference, and to facilitate water intake and pumping.

[0025] The observation port uses a 50mm straight pipe welded to the pressure-bearing steel plate 2. The bottom of the pipe is 10cm higher than the bottom pad layer. According to the principle of communicating vessels, the water level in the pit can be seen directly, and it can be decided whether to pump water to avoid the water pump 8 burning out. If the water pump 8 burns out, the steel cover plate and the upper waterproof layer will have to be removed, which is very troublesome to construct. Depending on the conditions, a float valve can be installed in the observation hole for automatic water pumping.

[0026] Step 6: Waterproofing of Temporary Sump 5. Since the surface of the foundation layer has already isolated water, large-area waterproofing can be carried out. Waterproofing can also be laid at the location of Temporary Sump 5, with a waterproof joint reserved 10 cm away from the two holes. Waterproofing can be laid in other areas. The waterproof joint should have a pre-cut interface to save time during sealing. After the waterproofing is completed, the raft foundation reinforcement will be tied as a whole.

[0027] Step 7: Pre-reserved waterproof openings and seal them. One hour before the raft slab is poured with concrete, the waterproof openings are sealed. First, the temporary sump 5 is pumped to the lowest water level. Then, the outlet drain pipe and water pump line 8 are cut off. The concrete self-weight is used to press the steel cap 25 into the water outlet before the waterproof sealing operation is carried out.

[0028] After the waterproofing work is completed, the concrete pouring of the temporary sump 5 should be carried out immediately. The concrete's own weight will pressurize the air layer in the temporary sump 5, isolating the water layer at a certain position on the pressure-bearing steel plate 2, thereby achieving the anti-leakage requirement.

[0029] Since the water pump 8 cannot be removed after the raft slab reinforcement is tied, the original water pump 8 will be left in the temporary sump 5.

[0030] In order to better meet the stress requirements at this location, additional reinforcing bars can be added to the bottom layer of the raft foundation. The same type of reinforcing bars as the raft foundation should be used for a grid-like reinforcement. The reinforcing bars should be completed before the waterproofing work is applied to minimize the workload before pouring.

[0031] The seepage treatment of temporary sump pit 5 is now complete. Since the waterproofing design of this project is a pre-laid reverse-adhesive waterproofing structure, there is no need to apply a waterproofing protective layer, which can save the construction period. However, care should be taken to avoid damage to the waterproofing during the binding of the steel bars. If any damage occurs, repair work should be arranged as soon as possible to prevent leakage.

[0032] The above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

Claims

1. A structure for treating water seepage in the foundation layer of an elevator shaft, characterized in that: A corrugated pipe (6) is installed inside the temporary sump (5). The bottom of the temporary sump (5) is made of concrete as a concrete cushion layer (7). A pressure-bearing steel plate (2) is installed on the top of the temporary sump (5). The connection between the pressure-bearing steel plate (2) and the temporary sump (5) is sealed tightly with sealant (3). A drain pipe (22) and an observation hole (23) are opened on the pressure-bearing steel plate (2). The bottom of the drain pipe (22) is connected to the water pump (8). The water pump (8) is placed in the corrugated pipe (6) and placed on the concrete cushion layer (7). A vertical steel cap clamp (24) is installed at the bottom of the pressure-bearing steel plate (2) at the position of the drain pipe (22). A concrete self-weight counter-pressure steel cap (25) is installed at the top of the position of the drain pipe (22). A layer of post-construction waterproof layer (26) is laid on the surface of the concrete self-weight counter-pressure steel cap (25).

2. The cushion water penetration treatment structure of an elevator shaft according to claim 1, characterized by: A pressure-bearing steel plate (2) is installed on the drainage trench (1) of the cushion layer. The connection between the pressure-bearing steel plate (2) and the drainage trench (1) of the cushion layer is sealed tightly with sealant (3). A waterproof layer (4) is applied to the surface of the pressure-bearing steel plate (2) to seal it tightly.

3. The seepage treatment structure for the elevator shaft bedding layer according to claim 1, characterized in that: Temporary support legs (21) are welded to the bottom of the pressure-bearing steel plate (2). The temporary support legs (21) extend into the corrugated pipe (6) and are placed on the concrete pad (7) for support.

4. The cushion water penetration treatment structure of an elevator shaft according to claim 1, characterized by: A 60mm hole is made in the pressure-bearing steel plate (2) and a drain pipe (22) is connected. Another 50mm hole is made and a steel pipe is connected as an observation hole (23).

Images