High-low span basement anti-floating system
By designing a high and low-level basement anti-floating system including a perimeter-circular blind groove, inspection well, sludge well, high bottom and low bottom drainage channels, the problems of complex and high cost of traditional anti-floating structures are solved, and the construction of traditional anti-floating structures is achieved. Simplify construction, reduce costs and improve water transfer capacity.
Patent Information
- Application Number
- CN202420467956.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-03-11
AI Technical Summary
Traditional high and low-rise basement anti-floating structures have many construction processes, long construction periods, high costs, poor hydrophobic capacity, easy to block, and inconvenient for detection.
Design a high and low-span basement anti-floating system, including a blind groove through a perimeter, inspection well, sludge well, high bottom surface and low bottom surface drainage channels, and use gravity to transport water step by step, and the water flow through the transverse blind groove and the perimeter to carry a long Blind ditch, inspection well, high bottom and low bottom drainage channels, and eventually flow to the outdoor drainage system.
The construction process is simplified, the construction period is shortened, the cost is reduced, the water transfer capacity is improved, the blockage is avoided, and the inspection and maintenance are facilitated.
Smart Images
Figure CN222477555U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of basement anti-floating systems, in particular to a high-low span basement anti-floating system. Background Art
[0002] As the scale of urban underground structures becomes larger and larger, the anti-floating problem of basements becomes more and more prominent, and solving the anti-floating problem becomes the key to underground engineering construction;
[0003] Construction projects often encounter large terrain height differences. For example, in construction projects built on mountains, high groundwater levels will generate buoyancy on buildings, especially the buoyancy of high-span groundwater levels on low-span buildings. This will have an adverse effect on buildings, such as differential settlement and increased structural stress, which will cause damage to the connection parts between buildings, resulting in wall cracks and failure of connection components.
[0004] In order to solve the above technical problems in the existing design, the measures adopted by technical personnel in this field mainly include anti-floating anchor rod method or setting drainage blind ditch under the basement floor; the anti-floating effect of setting drainage blind ditch is not good, and it is usually used in combination with anti-floating anchor rod, anti-pullout pile and other technologies; traditional anti-floating anchor rods are mostly made by drilling holes, grouting equipment and anchoring anchor rods in the basement floor, which has the disadvantages of many processes, long construction period, high cost, complex anchor rod waterproof node processing, easy water seepage, and inability to maintain and monitor groundwater level. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art, the utility model provides a high-low span basement anti-floating system to solve the technical problems of the traditional high-low span basement anti-floating structure with many construction processes, long construction period, high cost, poor drainage ability, easy clogging and inconvenient detection;
[0006] The technical solution adopted by the utility model to solve its technical problems is:
[0007] A high-low span basement anti-floating system, the basement comprising a basement top plate, a basement bottom plate, a basement wall, and a foundation pit wall arranged on one side of the basement wall;
[0008] A circumferential blind ditch is provided along the wall of the basement;
[0009] The basement floor comprises a high bottom surface and a low bottom surface; a high bottom surface drainage channel arranged in a crisscross pattern is provided below the horizontal surface of the high bottom surface; a low bottom surface drainage channel arranged in a crisscross pattern is provided below the horizontal surface of the low bottom surface;
[0010] An inspection well is provided between the high bottom surface drainage channel and the perimeter full-length blind ditch, and the inspection well is connected with the high bottom surface drainage channel and the perimeter full-length blind ditch;
[0011] A sludge well is provided between the high bottom surface drainage channel and the low bottom surface drainage channel, and the sludge well is connected with the high bottom surface drainage channel and the low bottom surface drainage channel;
[0012] A transverse blind ditch is provided in the foundation pit wall, and the transverse blind ditch is used to guide the water in the foundation pit wall into the circumferential full-length blind ditch;
[0013] One end of the low-bottom drainage channel away from the sludge pit is connected to an outdoor drainage system.
[0014] In the high-low span basement anti-floating system as described above, the bottoms of the inspection well and the silt well are inclined toward the outdoor drainage system with a slope ratio of α, so as to guide the liquid in the inspection well and the silt well into the outdoor drainage system.
[0015] In the high-low span basement anti-floating system as described above, the inspection wells are arranged axially at intervals along the circumferential full-length blind ditch.
[0016] The high-low span basement anti-floating system as described above, the high bottom surface drainage channel and the low bottom surface drainage channel include the following structures: drainage channel blind pipe, drainage channel gravel cushion layer, drainage channel outer filter layer, drainage channel filter material and drainage channel inner filter layer;
[0017] The drainage blind pipe is used for supplying water flow and silt circulation, the inner filter layer of the drainage channel is arranged on the outer peripheral side of the drainage blind pipe, the drainage filter material is arranged on the outer peripheral side of the inner filter layer of the drainage channel, and the drainage gravel cushion layer is arranged at the bottom of the drainage filter material; the outermost sides of the high bottom surface drainage channel and the low bottom surface drainage channel are composed of the outer filter layer of the drainage channel.
[0018] In the anti-floating system of the high-low span basement as described above, the slope ratio between the transverse blind ditch and the axis of the inspection well is β, and the β is ≥ 1%.
[0019] In the high-low span basement anti-floating system as described above, water pumps are provided in the inspection well and the sludge well.
[0020] As described above, in the high-low span basement anti-floating system, electric water level meters are provided in the inspection well and the siltation well, and the electric water level meters are used to detect the water level conditions in the inspection well and the siltation well.
[0021] For the high-low span basement anti-floating system as described above, the α is 0.5%-1.5%.
[0022] The anti-floating system of the high-low span basement as described above, wherein the perimeter full-length blind ditch comprises a first blind pipe, a first crushed stone cushion layer, a first outer filter layer, a first filter material, a first inner filter layer and a first reverse filter layer;
[0023] The first blind pipe is used for supplying water flow and silt circulation, the first inner filter layer is arranged on the outer peripheral side of the first blind pipe, the first filter material is arranged on the outer peripheral side of the first inner filter layer, and the first gravel cushion layer is arranged on the bottom of the first filter material; the first outer filter layer is used to enclose the first blind pipe, the first gravel cushion layer, the first filter material and the first inner filter layer; the outermost side of the circumferential full-length blind ditch is composed of the first anti-filter layer.
[0024] In the high-low span basement anti-floating system as described above, the number of the first blind pipes is greater than the number of the drainage channel blind pipes;
[0025] The high-low span basement anti-floating system as described above also includes a basement outer wall arranged on one side of the basement wall, and a second drainage channel is arranged on the basement outer wall. The second drainage channel is arranged below the horizontal plane of the circumferential full-length blind ditch and is connected to the outdoor drainage system.
[0026] The beneficial effects of the utility model are:
[0027] When the groundwater level becomes higher, water will be introduced from the horizontal blind ditch under the action of gravity, and will flow to the peripheral blind ditch, inspection well, high bottom surface drainage channel, sludge well, low bottom surface drainage channel in sequence, and finally flow to the outdoor drainage system; the utility model has a simple structure, fewer construction processes, short construction period and low cost; it uses gravity to convey water step by step to improve the water conveyance capacity; and it is easy to detect while avoiding blockage by setting up inspection wells and sludge wells. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0029] Figure 1 It is an overall schematic diagram of the utility model;
[0030] Figure 2 It is a structural schematic diagram of the low bottom surface drainage channel in the utility model;
[0031] Figure 3 It is a structural schematic diagram of the circumferential full-length blind ditch and the transverse blind ditch in the utility model;
[0032] Figure 4 It is a structural schematic diagram of the second drainage channel and the local outdoor drainage system in the utility model;
[0033] Figure 5 It is a structural schematic diagram of the inspection well and the first blind pipe in the utility model;
[0034] Figure 6 It is a structural schematic diagram of the outdoor drainage system in the utility model. DETAILED DESCRIPTION
[0035] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.
[0036] Reference Figure 1 , Figure 6 , a high-low span basement anti-floating system, the basement includes a basement top plate, a basement bottom plate 12, a basement wall 13 and a foundation pit wall 14 arranged on one side of the basement wall 13;
[0037] A circumferential blind ditch 21 is provided along the basement wall 13;
[0038] The basement floor 12 includes a high bottom surface 121 and a low bottom surface 122; a high bottom surface drainage channel 22 arranged in a crisscross pattern is provided below the horizontal plane of the high bottom surface 121; a low bottom surface drainage channel 23 arranged in a crisscross pattern is provided below the horizontal plane of the low bottom surface 122;
[0039] An inspection well 31 is provided between the high bottom surface drainage channel 22 and the circumferential full-length blind ditch 21, and the inspection well 31 is connected to the high bottom surface drainage channel 22 and the circumferential full-length blind ditch 21;
[0040] A sludge well 32 is provided between the high bottom surface drainage channel 22 and the low bottom surface drainage channel 23, and the sludge well 32 is connected to the high bottom surface drainage channel 22 and the low bottom surface drainage channel 23;
[0041] A transverse blind ditch 24 is provided in the foundation pit wall 14, and the transverse blind ditch 24 is used to guide the water in the foundation pit wall 14 into the circumferential full-length blind ditch 21;
[0042] One end of the low-bottom drainage channel 23 away from the sludge pit 32 is connected to the outdoor drainage system 7 .
[0043] In construction projects with height differences such as those built on mountains, there is a large amount of groundwater in the gaps of the soil and the cracks of the rock mass. The groundwater will generate buoyancy on the underground structures or depression-type structures buried in or above the rock and soil. If the deadweight of the structure is less than the buoyancy, it will arch or float up and become unstable, affecting the normal use of the structure. Therefore, draining the water that has seeped into the building can reduce the buoyancy caused by the water on the building.
[0044] When the groundwater level rises, the water that has infiltrated into the foundation pit wall will be introduced by the horizontal blind ditch under the action of gravity, and will flow to the peripheral blind ditch, the inspection well, the high bottom drainage channel, the sludge well, the low bottom drainage channel and finally to the outdoor drainage system, thus forming a permanent gravity groundwater drainage system, which can effectively control the groundwater level to ensure that the water level in the basement is lower than the safe water level.
[0045] The utility model has a simple structure, few construction procedures, short construction period and low cost; it utilizes gravity to convey water step by step to improve the water conveying capacity; and it is convenient for detection to prevent blockage while separately setting inspection wells and siltation wells.
[0046] Furthermore, the outer periphery of the transverse blind groove 24 is wrapped with an outer filter layer; the wrapping range of the outer filter layer is: 250 mm along the axial direction of the transverse blind groove 24 .
[0047] Furthermore, the dimensions of the high bottom surface drainage channel 22 and the low bottom surface drainage channel 23 are 800mm*1100mm; the dimensions of the circumferential blind ditch are 800mm*1400mm, and the transverse blind ditch is made of a plastic pipe with a diameter of 80mm.
[0048] Specifically, the longitudinally arranged high bottom surface drainage channel and the transversely arranged high bottom surface drainage channel are connected at their joints by using a plastic corrugated pipe; the longitudinally arranged low bottom surface drainage channel and the transversely arranged low bottom surface drainage channel are connected at their joints by using a plastic corrugated pipe.
[0049] Furthermore, the height difference between the high bottom surface drainage channel 22 and the low bottom surface drainage channel 23 is 5 m.
[0050] Reference Figure 5 Furthermore, the bottoms of the inspection well 31 and the sludge well 32 are inclined toward the outdoor drainage system 7 with a slope ratio of α, so as to guide the liquid in the inspection well 31 and the sludge well 32 into the outdoor drainage system 7.
[0051] Furthermore, the inspection wells 31 are arranged axially at intervals along the circumferential through-length blind ditch 21 to increase the drainage capacity of the basement anti-floating system drainage system and improve the drainage speed so that water can be quickly discharged when the low water level rises.
[0052] Reference Figure 3 Further, the circumferential through-length blind ditch 21 includes a first blind pipe 61, a first gravel cushion layer 62, a first outer filter layer 63, a first filter material 64, a first inner filter layer 65 and a first reverse filter layer 66;
[0053] The first blind pipe 61 is used for supplying water flow and silt circulation, the first inner filter layer 65 is arranged on the outer peripheral side of the first blind pipe 61, the first filter material 64 is arranged on the outer peripheral side of the first inner filter layer 65, and the first gravel cushion layer 62 is arranged at the bottom of the first filter material 64; the first outer filter layer 63 is used to enclose the first blind pipe 61, the first gravel cushion layer 62, the first filter material 64 and the first inner filter layer 65; the outermost side of the circumferential through-length blind ditch 21 is composed of the first reverse filter layer 66.
[0054] Specifically, the first blind pipe 61 is a plastic wire blind ditch pipe with an outer diameter of 300 mm and a porosity of ≥85%, and its performance complies with the relevant provisions of the current national standard "Soft Permeable Pipe" (JC 937-2004).
[0055] Specifically, the first outer filter layer 63 and the first inner filter layer 65 are needle-punched geotextiles with a weight greater than 300g / m2, and the technical requirements of the needle-punched geotextiles should meet the following requirements: 1) elongation at break ≥ 40%; 2) tensile strength ≥ 8.0kN / m; 3) permeability coefficient ≥ 0.1cm / s; 4) CBR bursting strength ≥ 4kN; 5) equivalent pore size O95 ≤ 0.1mm.
[0056] Specifically, the first filter layer 66 is 100 mm thick medium-coarse sand; the first filter material 64 is composed of unevenly graded gravel; more specifically, the gravel particle size is 5-10 mm and 20-30 mm and the mud content is not more than 2%; the particle size of the first filter material 64 is 250 mm.
[0057] Specifically, the outdoor drainage system 7 is a municipal rainwater system.
[0058] Specifically, the inspection wells 31 are arranged at intervals of 50m along the circumferential blind ditch 21, and the inspection wells at the corners and high and low spans of the circumferential blind ditch 21 also serve as sludge wells 32; the well bottom plate is lowered by 600mm. The size of the inspection well 31 is φ1000; the inspection well 31 and the sludge well 32 include a well body and a well cover, and the well cover of the inspection well 31 is provided with an anti-fall device made of ductile iron or plastic mesh plate; the well bodies of the inspection well 31 and the sludge well 32 are provided with maintenance steps made of ductile iron.
[0059] Reference Figure 5 Specifically, the first blind pipes 61 in the circumferential through-length blind grooves 21 on both sides of the inspection well 31 are arranged in parallel.
[0060] Furthermore, the high bottom surface drainage channel 22 and the low bottom surface drainage channel 23 include the following structures: drainage channel blind pipe 41, drainage channel gravel cushion layer 42, drainage channel outer filter layer 43, drainage channel filter material 44 and drainage channel inner filter layer 45;
[0061] Reference Figure 2 The drainage blind pipe 41 is used for supplying water flow and silt circulation, the drainage inner filter layer 45 is arranged on the outer peripheral side of the drainage blind pipe 41, the drainage filter material 44 is arranged on the outer peripheral side of the drainage inner filter layer 45, and the drainage gravel cushion layer 42 is arranged on the bottom of the drainage filter material 44; the outermost sides of the high bottom surface drainage channel 22 and the low bottom surface drainage channel 23 are composed of the drainage outer filter layer 43.
[0062] Specifically, a concrete cushion layer 46 is disposed above the drainage filter material 44 .
[0063] Specifically, the drainage blind pipe 41 is a plastic wire blind ditch pipe with an outer diameter of 300 mm and a porosity of ≥85%, and its performance complies with the relevant provisions of the current national standard "Soft Permeable Pipe" (JC 937-2004).
[0064] Specifically, the outer filter layer 43 of the drainage channel and the inner filter layer 45 of the drainage channel are needle-punched geotextiles with a weight greater than 300g / m2, and the technical requirements of the needle-punched geotextiles should meet the following requirements: 1) elongation at break ≥40%; 2) tensile strength ≥8.0kN / m; 3) permeability coefficient ≥0.1cm / s; 4) CBR bursting strength ≥4kN; 5) equivalent pore size O95≤0.1mm.
[0065] Furthermore, the slope ratio between the transverse blind ditch 24 and the axis of the inspection well 31 is β, and β≥1%.
[0066] Reference Figure 5 Furthermore, a water pump 51 is provided in the inspection well 31 and the sludge well 32 .
[0067] Reference Figure 5 Furthermore, an electric water level meter 52 is provided in the inspection well 31 and the silt well 32. The electric water level meter 52 is used to detect the water level in the inspection well 31 and the silt well 32. When the electric water level meter 52 monitors and finds that the groundwater level obviously exceeds the safe water level, the pump 51 should be started in time for drainage.
[0068] Furthermore, the α is 0.5%-1.5%.
[0069] Furthermore, the number of the first blind pipes 61 is greater than the number of the drainage channel blind pipes 41 .
[0070] Specifically, the drainage channel blind pipes 41 are 2 blind pipes, and the first blind pipes 61 are 3;
[0071] Specifically, the drainage channel blind pipe 41 is vertically connected to the first blind pipe 61 through a PVC pipe.
[0072] More specifically, the drainage blind pipe 41 is bent and inserted into the PVC pipe, thereby being connected to the PVC pipe; more specifically, the drainage blind pipe 41 is inserted into the PVC pipe by a length of 300 mm.
[0073] Furthermore, it also includes a basement outer wall arranged on one side of the basement wall 13, and a second drainage channel 25 is provided on the basement outer wall. The second drainage channel 25 is arranged below the horizontal plane of the circumferential full-length blind ditch 21 and is connected to the outdoor drainage system 7.
[0074] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A high-low span basement anti-floating system, characterized in that: The basement comprises a basement top plate, a basement bottom plate (12), a basement wall (13), and a foundation pit wall (14) arranged on one side of the basement wall (13); A circumferential full-length blind ditch (21) is provided along the basement wall (13); The basement floor (12) comprises a high bottom surface (121) and a low bottom surface (122); a high bottom surface drainage channel (22) arranged in a crisscross pattern is provided below the horizontal surface of the high bottom surface (121); and a low bottom surface drainage channel (23) arranged in a crisscross pattern is provided below the horizontal surface of the low bottom surface (122); An inspection well (31) is provided between the high bottom surface drainage channel (22) and the circumferential full-length blind ditch (21), and the inspection well (31) is connected to the high bottom surface drainage channel (22) and the circumferential full-length blind ditch (21); A sludge well (32) is provided between the high bottom surface drainage channel (22) and the low bottom surface drainage channel (23), and the sludge well (32) is connected to the high bottom surface drainage channel (22) and the low bottom surface drainage channel (23); A transverse blind ditch (24) is provided in the foundation pit wall (14), and the transverse blind ditch (24) is used to guide water in the foundation pit wall (14) into the circumferential full-length blind ditch (21); One end of the low-bottom drainage channel (23) away from the sludge pit (32) is connected to an outdoor drainage system (7).
2. The high-low span basement anti-floating system according to claim 1, characterized in that: The bottoms of the inspection well (31) and the silt well (32) are inclined toward the outdoor drainage system (7) with a slope ratio of α, so as to guide the liquid in the inspection well (31) and the silt well (32) into the outdoor drainage system (7); The α is 0.5%-1.5%.
3. The high-low span basement anti-floating system according to claim 1, characterized in that: The inspection wells (31) are arranged at axial intervals along the circumferential through-length blind groove (21).
4. The high-low span basement anti-floating system according to claim 2, characterized in that: The high bottom surface drainage channel (22) and the low bottom surface drainage channel (23) comprise the following structures: a drainage channel blind pipe (41), a drainage channel gravel cushion layer (42), a drainage channel outer filter layer (43), a drainage channel filter material (44) and a drainage channel inner filter layer (45); The drainage channel blind pipe (41) is used for supplying water flow and silt circulation; the drainage channel inner filter layer (45) is arranged on the outer peripheral side of the drainage channel blind pipe (41); the drainage channel filter material (44) is arranged on the outer peripheral side of the drainage channel inner filter layer (45); the drainage channel gravel cushion layer (42) is arranged at the bottom of the drainage channel filter material (44); and the outermost sides of the high bottom surface drainage channel (22) and the low bottom surface drainage channel (23) are composed of the drainage channel outer filter layer (43).
5. The high-low span basement anti-floating system according to claim 1, characterized in that: The slope ratio between the transverse blind ditch (24) and the axis of the inspection well (31) is β, and β is ≥ 1%.
6. The high-low span basement anti-floating system according to claim 1, characterized in that: A water pump (51) is provided in the inspection well (31) and the silt well (32).
7. The high-low span basement anti-floating system according to claim 6, characterized in that: The inspection well (31) and the silt well (32) are provided with an electric water level meter (52), and the electric water level meter (52) is used to detect the water level conditions in the inspection well (31) and the silt well (32).
8. The high-low span basement anti-floating system according to claim 4, characterized in that: The circumferential through-length blind ditch (21) comprises a first blind pipe (61), a first crushed stone cushion layer (62), a first outer filter layer (63), a first filter material (64), a first inner filter layer (65) and a first reverse filter layer (66); The first blind pipe (61) is used for supplying water flow and silt circulation; the first inner filter layer (65) is arranged on the outer peripheral side of the first blind pipe (61); the first filter material (64) is arranged on the outer peripheral side of the first inner filter layer (65); the first gravel cushion layer (62) is arranged at the bottom of the first filter material (64); the first outer filter layer (63) is used for enclosing the first blind pipe (61), the first gravel cushion layer (62), the first filter material (64) and the first inner filter layer (65); the outermost side of the circumferential through-length blind ditch (21) is composed of the first reverse filter layer (66).
9. The high-low span basement anti-floating system according to claim 8, characterized in that: The number of the first blind pipes (61) is greater than the number of the drainage channel blind pipes (41).
10. The high-low span basement anti-floating system according to claim 1, characterized in that: It also includes a basement outer wall arranged on one side of the basement wall (13), and a second drainage channel (25) is arranged on the basement outer wall. The second drainage channel (25) is arranged below the horizontal plane of the circumferential full-length blind ditch (21) and is connected to the outdoor drainage system (7).