Foundation pit bottom leakage water treatment structure
By setting up a drainage ditches and water collection wells at the bottom of the foundation pit, the problem of poor water leakage treatment at the bottom of the foundation pit is solved, and timely water discharge and waterproofing effect are improved.
Patent Information
- Application Number
- CN202421942815.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The existing technology cannot effectively deal with water leakage at the bottom of the foundation pit, which is difficult to construct, high cost, and has poor waterproofing effect.
A water leakage treatment structure at the bottom of the foundation pit was designed, including a drainage ditch with a width of 0.3m and a slope of 5‰, and a water collection well with a dimension of 1m x 1m x 1.3m every 30m. The water collection well is connected to the drainage ditch, and a cement mortar and a double-layer water filter layer are provided inside.
The timely discharge of water leakage at the bottom of the foundation pit is achieved, the humidity at the bottom of the foundation pit is reduced, the construction process is simplified, the cost is reduced, and the waterproofing effect is improved.
Smart Images
Figure CN222949030U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of building construction, and in particular to a water seepage treatment structure at the bottom of a foundation pit. Background Art
[0002] With the rapid development of new urbanization, the scale of construction has been rapidly expanded, more and more underground facilities have emerged, and there are more and more super-large and super-deep basements. More large buildings are located along rivers and coasts. The underground soil layer with good permeability is often connected with the river water. The geological data sometimes cannot fully and accurately reflect the geological conditions. With the excavation of the foundation pit, the sand and water at the bottom of the foundation pit will emerge from the foundation pit, and even pipe bursts will occur. At this time, rapid drainage measures need to be taken.
[0003] The existing technology is unable to effectively deal with the problem of water leakage at the bottom of the foundation pit. At the same time, the construction is difficult, the cost is high, and the waterproof effect is not ideal. Utility Model Content
[0004] In response to the shortcomings of the prior art, the present application provides a seepage water treatment structure at the bottom of a foundation pit, which has the advantages of being able to discharge the seepage water at the bottom of the foundation pit in time, avoiding waste of water resources, and reducing the humidity at the bottom of the foundation pit, which is beneficial to the construction and use of underground projects. It solves the problem that the prior art cannot effectively treat the seepage water at the bottom of the foundation pit, and at the same time, the problems of great construction difficulty, high cost, and unsatisfactory waterproofing effect.
[0005] To achieve the above objectives, the present application provides the following technical solutions: a foundation pit bottom leakage treatment structure, comprising a pit bottom, a water collection well is provided inside the pit bottom, a drainage ditch is provided inside the pit bottom, and the inner wall of the water collection well is provided with cement mortar.
[0006] Through the above scheme, since the existing technology cannot effectively deal with the problem of water leakage at the bottom of the foundation pit, and the construction is difficult, costly, and the waterproof effect is not ideal, a drainage ditch with a bottom width of 0.3m and a slope of 5‰ is set, and a collection well with a size of 1m x 1m x 1.3m is set every 30m to facilitate drainage operations at the bottom of the pit. The leakage water at the bottom of the foundation pit can be discharged in time, the humidity at the bottom of the foundation pit can be reduced, and the operation is convenient.
[0007] Furthermore, the water collection wells are connected to the drainage ditch, and the spacing between the water collection wells is 30m.
[0008] Through the above scheme, the water in the drainage ditch can flow into the collection well, which is convenient for drainage operations. The 30m interval between the collection wells can ensure smooth drainage of the drainage ditch.
[0009] Furthermore, the dimensions of the water collection well are 1m (L) x 1m (B) x 1.3m (H), the width of the bottom of the drainage ditch is 0.3m, and the bottom of the drainage ditch is 0.3m lower than the excavation surface.
[0010] Through the above scheme, the water in the drainage ditch can be discharged into the water collection well and stored in the water collection well, which is convenient for drainage.
[0011] Furthermore, a first thick layer of crushed stone is provided inside the water collection well, and a first thick layer of coarse sand is provided above the first thick layer of crushed stone.
[0012] Through the above scheme, the first thick crushed stone and the first thick coarse sand can form a double-layer water filtration layer, avoiding the pumping time too long resulting in the extraction of mud and sand, and preventing the bottom soil of the pit from being disturbed while ensuring that there is no blockage when pouring concrete on the bottom plate.
[0013] Furthermore, a second thickness of crushed stones is provided inside the drainage ditch, and a second thickness of coarse sand is provided above the second thickness of crushed stones.
[0014] Through the above scheme, the second thick gravel and the second thick coarse sand can form a double filter layer, avoiding the extraction of mud and sand due to too long pumping time, preventing the bottom soil of the pit from being disturbed, and ensuring that there is no blockage when pouring concrete on the bottom plate.
[0015] Furthermore, the drainage ditch adopts a 60mm thick C20 shotcrete surface layer, and the slope of the drainage ditch is 5‰.
[0016] Through the above scheme, the shotcrete surface layer has the characteristics of fast strength growth, strong bonding force, high density and good impermeability, which can effectively prevent water seepage in the drainage ditch and increase the stability of the drainage ditch.
[0017] Furthermore, the side wall of the water collection well adopts a 120mm thick brick membrane, and the bottom of the water collection well adopts a 100mm thick C15 plain concrete cushion layer.
[0018] Through the above scheme, the brick membrane is a high-performance building material, which is superior to other formwork materials in durability, stability and waterproof ability. It can withstand the influence of natural environment such as heavy pressure, thermal expansion and contraction, and is hard and durable enough to be used for many years without damage. The plain concrete cushion layer has good density, can insulate and keep heat, and is relatively easy to construct, which increases the durability and stability of the collection well.
[0019] Furthermore, a steel pipe is provided inside the first thick coarse sand, the bottom end of the steel pipe penetrates into the first thick crushed stone, a water stop steel plate is provided on the top end of the steel pipe, and the diameter of the steel pipe is 273 mm.
[0020] Through the above scheme, the water in the water collection well can be discharged in time through the steel pipe to ensure normal construction work at the bottom of the pit.
[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0022] The seepage water treatment structure at the bottom of the foundation pit has the effects of simple structure, reduced construction difficulty and investment cost, convenient drainage operation at the bottom of the pit, timely discharge of seepage water at the bottom of the foundation pit, reduced humidity at the bottom of the foundation pit, reduced construction burden on workers, convenient construction operation, and saving water resources, by setting up a drainage ditch with a bottom width of 0.3m and a slope of 5‰, and setting a collection well with a size of 1m (L) x1m (B) x1.3m (H) every 30m. It solves the problems of the prior art that the seepage water at the bottom of the foundation pit cannot be effectively treated, the construction is difficult, the cost is high, and the waterproof effect is not ideal. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is the overall three-dimensional structure diagram of this application;
[0024] Figure 2 This is the structural diagram of the water collection well for this application;
[0025] Figure 3 This is a side structural diagram of the application;
[0026] Figure 4 Drainage ditch structure diagram for this application;
[0027] Figure 5 Pipeline structure diagram for this application;
[0028] Figure 6 Cement mortar structure diagram for this application.
[0029] In the figure:
[0030] 1. Pit bottom; 2. Water collection well; 3. Drainage ditch; 4. Cement mortar; 5. First thick gravel; 6. First thick coarse sand; 7. Second thick gravel; 8. Second thick coarse sand; 9. Steel pipe; 10. Waterstop steel plate. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0032] See also Figure 1 , Figure 2 and Figure 5A foundation pit bottom leakage treatment structure in this embodiment includes a pit bottom 1, a water collection well 2 is provided inside the pit bottom 1, a drainage ditch 3 is provided inside the pit bottom 1, and the inner wall of the water collection well 2 is provided with cement mortar 4.
[0033] See also Figure 1 and Figure 2 The water collection well 2 is connected to the drainage ditch 3, and the spacing between the water collection wells 2 is 30m, which enables the water in the drainage ditch 3 to flow into the water collection well 2, facilitating the drainage operation. The water collection wells 2 are spaced 30m apart to ensure smooth drainage of the drainage ditch 3.
[0034] See also Figure 2 , Figure 5 and Figure 6 The size of the water collection well 2 is 1m (L) x 1m (B) x 1.3m (H), the width of the bottom of the drainage ditch 3 is 0.3m, and the bottom of the drainage ditch 3 is 0.3m lower than the excavation surface, so that the water in the drainage ditch 3 can be discharged into the water collection well 2 and stored in the water collection well 2, which is convenient for drainage.
[0035] See also Figure 5 A first thick gravel 5 is provided inside the water collection well 2, and a first thick coarse sand 6 is provided above the first thick gravel 5. The first thick gravel 5 and the first thick coarse sand 6 can form a double-layer water filtration layer to avoid mud and sand being pumped out due to too long pumping time, and to prevent the soil at the bottom of the pit 1 from being disturbed while ensuring that there is no blockage when pouring concrete on the bottom plate.
[0036] See also Figure 1 , Figure 2 and Figure 3 A second thick gravel 7 is provided inside the drainage ditch 3, and a second thick coarse sand 8 is provided above the second thick gravel 7. The second thick gravel 7 and the second thick coarse sand 8 can form a double-layer water filtration layer to avoid mud and sand being pumped out due to too long pumping time, prevent the soil at the bottom of the pit 1 from being disturbed, and ensure that there is no blockage when pouring concrete on the bottom plate.
[0037] See also Figure 2 , Figure 3 and Figure 4 The drainage ditch 3 adopts a 60mm thick C20 shotcrete surface layer, and the slope of the drainage ditch 3 is 5‰. The shotcrete surface layer has the characteristics of fast strength growth, strong adhesion, high density and good impermeability. It can effectively prevent water seepage in the drainage ditch 3 and increase the stability of the drainage ditch 3.
[0038] See also Figure 2 , Figure 5 and Figure 6The side walls of the water collection well 2 are made of 120mm thick brick membrane, and the bottom of the water collection well 2 is made of 100mm thick C15 plain concrete cushion. The brick membrane is a high-performance building material with better durability, stability and waterproof ability than other formwork materials. It can withstand the influence of natural environment such as heavy pressure, thermal expansion and contraction, and is hard and durable enough to be used for many years without damage. The plain concrete cushion has good density, can insulate and keep warm, and is relatively easy to construct, which increases the durability and stability of the water collection well 2.
[0039] See also Figure 1 , Figure 2 and Figure 5 A steel pipe 9 is provided inside the first thick coarse sand 6, and the bottom end of the steel pipe 9 is inserted into the first thick gravel 5. A water-stop steel plate 10 is provided on the top of the steel pipe 9. The diameter of the steel pipe 9 is 273 mm. The water in the water collection well 2 can be discharged in time through the steel pipe 9 to ensure the normal construction operation of the pit bottom 1.
[0040] A seepage water treatment structure at the bottom of a foundation pit in the present embodiment has the effect of simple structure, reduced construction difficulty and investment cost, convenient drainage operation at the bottom of the pit 1, timely discharge of seepage water at the bottom of the foundation pit, reduced humidity at the bottom of the foundation pit, reduced construction burden on workers, convenient construction operation, and saving water resources, thereby solving the problem that the prior art cannot effectively treat seepage water at the bottom of the foundation pit, and at the same time solves the problem that the construction is difficult, costly, and the waterproof effect is not ideal.
[0041] It should be noted that a water pump is placed in the steel pipe 9 according to the actual amount of water leakage at the pit bottom 1 , and the water collection well 2 is drained by the water pump to prevent water leakage from affecting normal construction work at the pit bottom 1 .
[0042] The working principle of the above embodiment is:
[0043] When the leakage water is at the position of the retaining piles at the bottom of the pit 1, a drainage ditch 3 and a water collection well 2 are set in the non-structural bottom plate area outside the bottom of the pit 1. The bottom width of the drainage ditch 3 is 0.3m, the slope is 5‰, the bottom of the drainage ditch 3 is 0.3m lower than the excavation surface, and a water collection well 2 is set every 30m, with a size of 1m (L) x1m (B) x1.3m (H). A 0.3m first thick gravel 5 is laid at the bottom of the well as a filter layer to prevent mud and sand from being pumped out due to long pumping time, and to prevent the soil at the bottom of the pit 1 from being disturbed. The bottom of the water collection well 2 is 1.0m lower than the bottom of the drainage ditch 3. When the leakage water is at the middle position of the bottom of the pit 1, a drainage ditch 3 and a water collection well 2 are set at the leakage position. The bottom width of the drainage ditch 3 is 0.3m, the slope is 5‰, the bottom of the drainage ditch 3 is 0.3m lower than the excavation surface, and a lower 0.2m second thick gravel 7 and an upper 0.1m A double-layer water filtration layer of the second thick coarse sand 8 is arranged every 30m of the water collection well 2, with a size of 1m (L) x1m (B) x1.3m (H). A double-layer water filtration layer of the lower 0.5m first thick gravel 5 and the upper 0.8m first thick coarse sand 6 is arranged in the water collection well 2. The water filtration layer can avoid the extraction of mud and sand due to long pumping time, and prevent the soil at the bottom of the pit 1 from being disturbed while ensuring that there is no blockage when pouring concrete on the bottom plate. A steel pipe 9 with a diameter of 273mm is arranged in the water collection well 2, and a water-stop steel plate 10 is welded on the pipe wall. A water pump is placed in the pipe according to the amount of seepage water at the bottom of the pit 1. After the bottom plate is poured, the "well" is "sealed". The seepage water at the bottom of the pit 1 can flow into the water collection well 2 through the drainage ditch 3, so as to avoid the influence of seepage on the operation and construction of the bottom of the pit 1 and facilitate timely drainage.
[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0045] Although the embodiments of the present application 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 application, and that the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A structure for treating water leakage at the bottom of a foundation pit, comprising a pit bottom (1), characterized in that: A water collection well (2) is provided inside the pit bottom (1), a drainage ditch (3) is provided inside the pit bottom (1), and cement mortar (4) is provided on the inner wall of the water collection well (2).
2. A foundation pit bottom leakage water treatment structure according to claim 1, characterized in that: The water collection wells (2) are connected to the drainage ditch (3), and the distance between the water collection wells (2) is 30m.
3. A foundation pit bottom leakage water treatment structure according to claim 1, characterized in that: The dimensions of the water collection well (2) are 1m x 1m x 1.3m, the width of the bottom of the drainage ditch (3) is 0.3m, and the bottom of the drainage ditch (3) is 0.3m lower than the excavation surface.
4. A foundation pit bottom leakage water treatment structure according to claim 1, characterized in that: A first thick layer of crushed stone (5) is provided inside the water collection well (2), and a first thick layer of coarse sand (6) is provided above the first thick layer of crushed stone (5).
5. A foundation pit bottom leakage water treatment structure according to claim 1, characterized in that: A second thick layer of crushed stone (7) is provided inside the drainage ditch (3), and a second thick layer of coarse sand (8) is provided above the second thick layer of crushed stone (7).
6. A foundation pit bottom leakage water treatment structure according to claim 1, characterized in that: The drainage ditch (3) uses a 60 mm thick C20 shotcrete surface layer, and the slope of the drainage ditch (3) is 5‰.
7. A foundation pit bottom leakage water treatment structure according to claim 1, characterized in that: The side wall of the water collection well (2) is made of a 120 mm thick brick membrane, and the bottom of the water collection well (2) is made of a 100 mm thick C15 plain concrete cushion.
8. A foundation pit bottom leakage water treatment structure according to claim 4, characterized in that: A steel pipe (9) is provided inside the first thick coarse sand (6), the bottom end of the steel pipe (9) protrudes into the first thick crushed stone (5), a water stop steel plate (10) is provided at the top end of the steel pipe (9), and the diameter of the steel pipe (9) is 273 mm.