Drainage system suitable for cohesive soil indwelling soil platform
By setting up a drainage system of transverse drainage sand ditch and water collection well on the clay soil indwelling platform, the problem of poor drainage performance of the clay soil indwelling platform is solved, and the effect of effectively reducing the amount of water accumulation and avoiding the collapse of the soil platform and deformation of the support piles is achieved.
Patent Information
- Application Number
- CN202420945568.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The drainage performance of the clay soil remains in the soil platform, which leads to long-term accumulation of water, reduces the strength of the soil platform, and even causes the soil platform to collapse, which in turn leads to excessive deformation of the supporting piles and increases the risk of danger.
Design a drainage system, including setting up two transverse drainage sand ditches and multiple collection wells on the clay soil indwelling platform, where the accumulated water is collected into the transverse drainage sand ditch and finally gathered into the collection well, effectively reducing the accumulated water deposit on the soil platform.
By quickly discharge the accumulated water on the earth platform, avoid the reduction of the strength and collapse of the earth platform, reduce the deformation of the support piles, and reduce the risk of danger.
Smart Images
Figure CN222648818U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of deep foundation pits, and in particular relates to a drainage system suitable for a clay soil retention platform. Background Art
[0002] Foundation pit drainage is a necessary measure to ensure the safety of foundation pit retaining structures during excavation. At present, common drainage methods in foundation pit engineering include pipe well drainage, light well point drainage, jet well point drainage, water collection and open drainage, etc. For clay soil, due to its low water content and poor permeability, water collection and open drainage are often used to control groundwater during foundation pit excavation. When the foundation pit adopts a basin-type excavation combined with a central island construction support scheme, the soil platform inside the support pile is retained for a long time. The soil platform inside the support pile can only be excavated after the support pile and the underground structure of the central island area form a stable support system. The soil platform plays a greater role in the support structure, especially in old clay. For support types such as clay, a drainage system with drainage holes on the slope of the earth platform and drainage ditches at the foot of the slope is often used. However, as the supporting piles move, more cracks will appear inside the earth platform and on the contact surface between the earth platform and the supporting piles. After precipitation, rainwater will penetrate into the interior of the earth platform through the cracks, and the clay soil itself has poor permeability, so it is difficult for water to flow out from the drainage holes and the drainage ditches at the foot of the slope. Water accumulates in the earth platform for a long time, which will cause the strength of the earth platform to decrease, or even the earth platform to collapse, resulting in excessive deformation of the supporting piles. The foundation pit using this support type is usually deeper and the surrounding environment of the foundation pit is more complex. Once a dangerous situation occurs, the loss will be greater. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a drainage system suitable for a clay soil retention platform, which is used to solve the technical problems in the prior art that the clay soil retention platform has poor drainage performance, long-term accumulation of water can easily lead to a reduction in the strength of the platform, and even cause the platform to collapse, thereby causing excessive deformation of the supporting piles and causing greater danger.
[0004] The utility model solves the above technical problems with the following technical solutions: A drainage system suitable for retaining soil platforms of clay soil, comprising:
[0005] A clay soil retention platform, wherein the clay soil retention platform is set to two layers, including an upper platform surface, a middle platform surface and a lower platform surface, an upslope surface connecting the upper platform surface and the middle platform surface, and a downslope surface connecting the middle platform surface and the lower platform surface;
[0006] Support piles, the support piles are arranged outside the clay soil retention platform;
[0007] At least two transverse drainage sand ditches, one of which is arranged on the side of the upper platform surface and between the support piles and the clay soil retention platform, and the other transverse drainage sand ditches is arranged on the lower platform surface;
[0008] A plurality of water collection wells are arranged at intervals along the transverse drainage sand ditch on the lower platform surface.
[0009] The utility model arranges a transverse drainage sand ditch on the retained soil platform, so that the accumulated water is collected in the transverse drainage sand ditch and finally collected in the water collection well, which can effectively reduce the amount of accumulated water on the clay soil retained soil platform and avoid the collapse of the soil platform.
[0010] Furthermore: it also includes a transverse drainage sand ditch, and the transverse drainage sand ditch is arranged on the middle platform surface.
[0011] The beneficial effect of adopting this step: the transverse drainage sand ditch on the middle platform surface can further improve the drainage capacity.
[0012] Furthermore: the upper platform surface and the middle platform surface have a slope of 3‰; the upper slope surface and the lower slope surface have a slope of 1:0.8
[0013] The beneficial effects of adopting this step are as follows: a slope of 3‰ can avoid water accumulation on the upper and middle platforms, and can direct water to the upper / lower slope surfaces. In addition to guiding the accumulated water to flow downward, the upper and lower slope surfaces can also retain clay in the soil platform layers, reducing the possibility of collapse.
[0014] Furthermore: the upslope surface and the downslope surface are respectively provided with a plurality of longitudinal drainage sand ditches;
[0015] The longitudinal drainage sand ditch passes through the upslope surface and the downslope surface correspondingly.
[0016] The beneficial effect of adopting this step is: the accumulated water is gathered through the vertical drainage sand ditch and smoothly discharged into the horizontal drainage sand ditch below.
[0017] Furthermore: the spacing between adjacent longitudinal drainage sand ditches is 3±0.5m.
[0018] The beneficial effect of adopting this step: the density of the longitudinal drainage sand ditch is a reasonable spacing calculated. If it is too dense, it will not only fail to accelerate the drainage, but also affect the structural strength of the upper and lower slopes. If it is too sparse, it will affect the drainage effect.
[0019] Furthermore: the spacing between the water collection wells is 30±1m.
[0020] The beneficial effects of adopting this step: the water storage efficiency of the water collection well is effective. The water collection well can only store accumulated water within a certain range. In order to prevent the accumulated water from seeping into the ground and overflowing the water collection well, the number of water collection wells needs to be arranged reasonably.
[0021] The beneficial effects of the utility model are:
[0022] First, the clay soil retention platform is set as a double-layer structure, and the width of the platform is lengthened by using the upslope surface, the downslope surface and the middle platform surface to delay the lateral displacement of the platform. Then, horizontal drainage ditches and longitudinal drainage ditches are set on the clay soil retention platform to quickly drain the accumulated water on the platform. Through the above two methods, the strength of the clay soil retention platform can be prevented from being reduced and collapse can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 The utility model provides a structural schematic diagram of a drainage system suitable for a clay soil retention platform.
[0025] Reference numerals:
[0026] 1-Support piles; 2-Retained soil platform for clay soil;
[0027] 21-upper platform surface; 22-middle platform surface; 23-lower platform surface; 31-lateral drainage sand ditch; 41-upward slope surface; 42-downward slope surface. DETAILED DESCRIPTION
[0028] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.
[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.
[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0031] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.
[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0034] Example
[0035] like Figure 1 As shown, the utility model provides a drainage system suitable for retaining soil platforms of clay soil, comprising:
[0036] A clay soil retention platform 2, wherein the clay soil retention platform 2 is configured as two layers, including an upper platform surface 21, a middle platform surface 22, and a lower platform surface 23, and an upslope surface 41 connecting the upper platform surface 21 and the middle platform surface 22, and a downslope surface 42 connecting the middle platform surface 22 and the lower platform surface 23;
[0037] Support piles 1, the support piles 1 are arranged outside the clay soil retention platform 2;
[0038] At least two transverse drainage sand grooves 31, one of which is arranged on the side of the upper platform surface 21 and between the support piles 1 and the clay soil retention platform 2, and the other transverse drainage sand groove 31 is arranged on the lower platform surface 23, and the two ends of the transverse drainage sand groove 31 extend to the two ends of the clay soil retention platform 2 respectively;
[0039] A plurality of water collection wells (not shown in the figure) are arranged at intervals along the transverse drainage sand ditch 31 of the lower platform surface 23.
[0040] The utility model provides a transverse drainage sand ditch 31 on the clay soil retention platform 2, so that the accumulated water is collected in the transverse drainage sand ditch 31 and finally collected in the water collection well, which can effectively reduce the amount of accumulated water on the clay soil retention platform 2 and avoid the collapse of the platform.
[0041] On the basis of the above technical solution, it further comprises a transverse drainage sand ditch 31 , and the transverse drainage sand ditch 31 is arranged on the middle platform surface 22 .
[0042] The transverse drainage sand groove 31 of the middle platform surface 22 can further improve the drainage capacity.
[0043] On the basis of the above technical solution, the upper platform surface 21 and the middle platform surface 22 have a slope of 3‰; the upper slope surface 41 and the lower slope surface 42 have a slope of 1:0.8.
[0044] The 3‰ slope can avoid water accumulation on the upper platform surface 21 and the middle platform surface 22, and can guide water into the upper slope surface 41 / lower slope surface 42. In addition to guiding the accumulated water to flow downward, the upper slope surface 41 and the lower slope surface 42 also have the function of retaining clay in the soil platform 2 in layers, reducing the possibility of its collapse.
[0045] On the basis of the above technical solution, the upslope surface 41 and the downslope surface 42 are also provided with a plurality of longitudinal drainage sand ditches (not shown in the figure);
[0046] The longitudinal drainage sand ditch passes through the upper slope surface 41 and the lower slope surface 42 correspondingly.
[0047] The accumulated water is collected through the longitudinal drainage sand ditch and smoothly discharged into the transverse drainage sand ditch 31 below.
[0048] Based on the above technical solution, the spacing between adjacent longitudinal drainage sand ditches is 3±0.5m.
[0049] The density of the longitudinal drainage sand ditch is a reasonable spacing calculated. If it is too dense, it will not only fail to speed up the drainage, but also affect the structural strength of the upper and lower slopes. If it is too sparse, it will affect the drainage effect.
[0050] Based on the above technical solution, the spacing between the water collection wells is 30±1m.
[0051] The water storage efficiency of a water collection well is limited. A water collection well can only store accumulated water within a certain range. In order to prevent the accumulated water from seeping into the ground and overflowing the water collection well, the number of water collection wells needs to be arranged reasonably.
[0052] The transverse drainage sand ditch 31 and the longitudinal drainage sand ditch are filled with small gravels, which can play a certain filtering role.
[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A drainage system suitable for retaining soil platform of clay soil, characterized in that: include: A clay soil retention platform, wherein the clay soil retention platform is set to two layers, including an upper platform surface, a middle platform surface and a lower platform surface, an upslope surface connecting the upper platform surface and the middle platform surface, and a downslope surface connecting the middle platform surface and the lower platform surface; Support piles, the support piles are arranged outside the clay soil retention platform; At least two transverse drainage sand ditches, one of which is arranged on the side of the upper platform surface and between the support piles and the clay soil retention platform, and the other transverse drainage sand ditches is arranged on the lower platform surface; A plurality of water collection wells are arranged at intervals along the transverse drainage sand ditch on the lower platform surface.
2. The drainage system for clay soil retention platform according to claim 1, characterized in that: It also includes a transverse drainage sand ditch, which is arranged on the middle platform surface.
3. The drainage system for clay soil retention platform according to claim 1, characterized in that: The upper platform surface and the middle platform surface have a slope of 3‰; the upper slope surface and the lower slope surface have a slope of 1:0.
8.
4. The drainage system for clay soil retention platform according to claim 1, characterized in that: The upslope surface and the downslope surface are also provided with a plurality of longitudinal drainage sand ditches respectively; The longitudinal drainage sand ditch passes through the upslope surface and the downslope surface correspondingly.
5. The drainage system for clay soil retention platform according to claim 4, characterized in that: The spacing between adjacent longitudinal drainage ditches is 3±0.5m.
6. The drainage system for clay soil retention platform according to claim 1, characterized in that: The spacing between the water collection wells is 30±1m.