CN116556310A - Construction method for treating interlayer water of impermeable layer on side wall of foundation pit - Google Patents
Construction method for treating interlayer water of impermeable layer on side wall of foundation pit Download PDFInfo
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- CN116556310A CN116556310A CN202310469471.6A CN202310469471A CN116556310A CN 116556310 A CN116556310 A CN 116556310A CN 202310469471 A CN202310469471 A CN 202310469471A CN 116556310 A CN116556310 A CN 116556310A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 239000011229 interlayer Substances 0.000 title claims abstract description 110
- 239000010410 layer Substances 0.000 title claims abstract description 73
- 238000010276 construction Methods 0.000 title claims abstract description 40
- 230000000903 blocking effect Effects 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 14
- 239000011083 cement mortar Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 15
- 239000004568 cement Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 239000004576 sand Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
A construction method for treating interlayer water of a impervious layer on a side wall of a foundation pit relates to the field of foundation pit construction. The construction method for treating the interlayer water of the impermeable layer on the side wall of the foundation pit comprises the following steps: determining an interlayer water area outside the foundation pit and a water source of the interlayer water area; penetrating a plurality of grouting pipes from the top of the interlayer water area to the interlayer water area respectively, and penetrating a plurality of drain pipes from the inner wall of the foundation pit to the interlayer water area respectively; grouting the interlayer water area by using a grouting pipe, pouring a water blocking layer in the interlayer water area, and discharging water in the interlayer water area through a drain pipe; the water blocking layer is used for blocking water sources in the interlayer water area from entering the interlayer water area. The construction method for treating the interlayer water of the impermeable layer on the side wall of the foundation pit can quickly cut off the water supply source of the interlayer water area to form an isolation barrier, and the water supply source of the interlayer water area is blocked from water gushing into the foundation pit, so that the construction method has the advantages of being simple in construction process, convenient to operate, obvious in water blocking effect and low in operation cost.
Description
Technical Field
The application relates to the field of foundation pit construction, in particular to a construction method for treating interlayer water of a water-impermeable layer on the side wall of a foundation pit.
Background
In the construction process of building engineering, foundation pit drainage groundwater is often needed, when foundation pit construction is carried out in areas with complex geological conditions and abundant surrounding water sources, the situation that part of conventional dewatering construction technology cannot effectively drain the groundwater exists, for example, soil layers with higher water permeability coefficients (such as a silty layer, a saturated sand layer and a silty layer) are distributed in the middle of soil layers with lower water permeability coefficients, in the dewatering process, because the water permeability coefficient of soil layers with higher water permeability coefficients is low at the lower parts of the soil layers, water contained in the soil layers with higher water permeability coefficients cannot permeate through the soil layers with lower water permeability coefficients in time to drain, and interlayer water is formed at the positions of the soil layers with higher water permeability coefficients when the underground water sources are abundant.
When the foundation pit is excavated, the interlayer water can continuously flow into the foundation pit, so that the foundation pit is damaged by the loss of soil between the foundation pit support piles as shown in fig. 1, the treatment is very difficult, and the earthwork collapse of the foundation pit is caused as shown in fig. 2 when the treatment is serious, so that the construction progress is seriously influenced. The existing treatment method is to make up steel sheet piles before supporting piles for water stopping, but the method has the defects of high engineering cost, long working period, large disturbance of mechanical construction to foundation soil, poor applicability, and lower applicability, and cannot meet the construction requirement especially under the working conditions of sudden collapse and damaged foundation pit slopes.
Disclosure of Invention
The utility model aims at providing a administer construction method of water-impermeable layer intermediate layer water of foundation ditch lateral wall, it can cut off the intermediate layer water district water supply source fast and form isolation barrier, blocks that the intermediate layer district is to the inside water gushing of foundation ditch, has construction simple process, convenient operation, water blocking effect are showing, advantage with low costs of operation.
The application is realized in such a way that:
the application provides a construction method for treating interlayer water of a water-impermeable layer on a side wall of a foundation pit, which comprises the following steps:
determining an interlayer water area outside the foundation pit and a water source of the interlayer water area;
penetrating a plurality of grouting pipes from the top of the interlayer water area to the interlayer water area respectively, and penetrating a plurality of drain pipes from the inner wall of the foundation pit to the interlayer water area respectively;
grouting the interlayer water area by using a grouting pipe, pouring a water blocking layer in the interlayer water area, and discharging water in the interlayer water area through a drain pipe; the water blocking layer is used for blocking water sources in the interlayer water area from entering the interlayer water area.
In some alternative embodiments, the crown beam is cast over the ground and the top ends of the individual grouting pipes are attached before grouting the sandwich water region.
In some alternative embodiments, the plurality of grouting pipes are spaced apart along the length of the water region of the interlayer, and the spacing between two adjacent grouting pipes is 1.5 to 2 times the slurry diffusion radius of the grouting pipes injected into the water region of the interlayer.
In some alternative embodiments, before the drain pipe penetrates from the inner wall of the foundation pit to the interlayer water area, a slidable protective pipe is sleeved on the outer wall of the drain pipe to seal the drain pipe, after a water blocking layer is formed in the interlayer water area by pouring, the protective pipe is pulled out of the interlayer water area, and the drain pipe is enabled to drain water in the interlayer water area.
In some alternative embodiments, the outer wall of the protective tube is coated with a lubricant or a release agent to pull the protective tube out of the water barrier and the interlayer water area after the slurry injected into the interlayer water area by the grouting tube solidifies to form the water barrier.
In some alternative embodiments, after the drain pipes penetrate into the interlayer water area, cement mortar is applied to fix the drain pipes after the steel mesh is paved on the inner wall of the foundation pit.
In some alternative embodiments, when grouting is performed to the region of the water in the interlayer using the grouting pipe, grouting is stopped when the grouting pipe returns to the grouting, the displacement of the foundation pit support pile suddenly increases, or the deformation rate of the foundation pit support pile suddenly increases.
In some alternative embodiments, a drain is constructed at the bottom of the inside of the foundation pit, and water drained from the drain is drained through the drain.
In some alternative embodiments, the water in each drain pipe is pumped out through the communicating pipe using a suction pump.
In some alternative embodiments, the drain pipe is disposed at an angle of 10-15 ° to the horizontal.
The beneficial effects of this application are: the construction method for treating the interlayer water of the impermeable layer on the side wall of the foundation pit comprises the following steps: determining an interlayer water area outside the foundation pit and a water source of the interlayer water area; penetrating a plurality of grouting pipes from the top of the interlayer water area to the interlayer water area respectively, and penetrating a plurality of drain pipes from the inner wall of the foundation pit to the interlayer water area respectively; grouting the interlayer water area by using a grouting pipe, pouring a water blocking layer in the interlayer water area, and discharging water in the interlayer water area through a drain pipe; the water blocking layer is used for blocking water sources in the interlayer water area from entering the interlayer water area. The construction method for treating the interlayer water of the impermeable layer on the side wall of the foundation pit can quickly cut off the water supply source of the interlayer water area to form an isolation barrier, and the water supply source of the interlayer water area is blocked from water gushing into the foundation pit, so that the construction method has the advantages of being simple in construction process, convenient to operate, obvious in water blocking effect and low in operation cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a prior art structure when the flow of water into a foundation pit causes the soil between foundation pit support piles to flow;
FIG. 2 is a schematic cross-sectional view of a foundation pit with a collapse of the foundation pit caused by inflow of water in the prior art;
fig. 3 is a schematic partial sectional view of a first view angle of draining water by a drainage ditch in a foundation pit in a construction method for treating interlayer water of a impermeable layer on a side wall of the foundation pit according to an embodiment of the present application;
fig. 4 is a schematic diagram of a partial cross-sectional structure of a second view angle of a foundation pit in a construction method for treating interlayer water of a impermeable layer on a side wall of the foundation pit according to an embodiment of the present application;
fig. 5 is a schematic diagram of a partial cross-sectional structure of a third view angle of a foundation pit in a construction method for treating interlayer water of a impermeable layer on a side wall of the foundation pit according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a grouting pipe in a construction method for treating interlayer water of a impermeable layer on a side wall of a foundation pit according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a drain pipe in a construction method for treating interlayer water of a impermeable layer on a side wall of a foundation pit according to an embodiment of the present application;
fig. 8 is a schematic diagram of a partial cross-sectional structure of a first view angle of a foundation pit draining by a vacuum pump in a construction method for treating interlayer water of a impermeable layer on a side wall of the foundation pit according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of connection between a protection pipe and a drain pipe in the construction method for treating interlayer water of a impermeable layer on a side wall of a foundation pit according to the embodiment of the present application;
fig. 10 is a schematic view of a partial structure of a foundation pit in a first view angle for draining water by using a protection pipe and a drain pipe in a construction method for treating interlayer water of a impermeable layer on a side wall of the foundation pit according to an embodiment of the present application;
fig. 11 is a schematic partial structure diagram of a second view angle of draining water by adopting a protection pipe and a drain pipe in a foundation pit in the construction method for treating interlayer water of a impermeable layer on a side wall of the foundation pit according to the embodiment of the application.
In the figure: 100. a foundation pit; 110. supporting piles; 120. a region of interlayer water; 130. a source of water in the water-in-water area; 140. an upper powder layer; 150. a sand layer; 160. a lower powder layer; 170. a crown beam; 180. reinforcing steel bar meshes; 190. a drainage ditch; 200. grouting pipe; 201. grouting holes; 210. a drain pipe; 211. a drain hole; 212. a positioning ring; 220. a protective tube; 221. a constricted end; 300. a vacuum suction pump; 310. and communicating pipe.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships that are conventionally put in use of the product of the application, are merely for convenience of description of the present application and simplification of description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The characteristics and properties of the construction method for treating the interlayer water of the impermeable layer of the side wall of the foundation pit are described in further detail below by combining the embodiments.
As shown in fig. 3, fig. 4, fig. 5, fig. 6, and fig. 7, the embodiment of the application provides a construction method for treating interlayer water of a water impermeable layer on a side wall of a foundation pit, which is used when the side wall of the foundation pit 100 contains interlayer water in the construction process of the foundation pit 100, the interlayer water cannot be discharged through the existing drainage measures such as a dewatering well or a light well point, and the interlayer water continuously gushes into the foundation pit 100 to cause soil loss or soil collapse between piles of a supporting pile 110 of the foundation pit 100, and mainly comprises the following steps:
determining an interlayer water area 120, an interlayer water area water source 130 and a water permeation direction outside the foundation pit 100, and measuring the buried depth of the interlayer water area 120; wherein the source 130 of the water in the water zone is a water source for the water in the water zone 120; in this embodiment, the soil layer outside the support pile 110 of the foundation pit 100 is composed of an upper silt layer 140, a sand layer 150 and a lower silt layer 160 sequentially arranged from top to bottom, the upper silt layer 140 and the lower silt layer 160 are impermeable layers, the sand layer 150 is a permeable layer, and the water source 130 of the interlayer water area is a river main canal;
the grouting pipes 200 are downwards inserted into the ground above the interlayer water area 120 along the direction perpendicular to the water permeation direction, so that the grouting pipes 200 penetrate through the upper silt layer 140 and the sand soil layer 150, and the bottoms of the grouting pipes are inserted into the lower silt layer 160, the grouting pipes 200 are arranged at intervals along the length direction of the interlayer water area 120, the distance between two adjacent grouting pipes 200 is 1.5-2 times of the slurry diffusion radius of the grouting pipes 200 injected into the interlayer water area 120, wherein the top of each grouting pipe 200 is a non-perforated section, the bottoms of the grouting pipes are provided with grouting holes 201 which are arranged at intervals, and the grouting into the interlayer water area 120 is ensured; when the grouting pipe 200 is constructed, a Luoyang shovel pilot hole or a small drill pilot hole can be adopted according to the geological hardness, the diameter of the pilot hole can be slightly larger than that of the grouting pipe 200 by 5-10mm, and the grouting pipe 200 can be conveniently inserted into the hole; after the arrangement of each grouting pipe 200 is completed, a groove is dug on the ground above the interlayer water area 120, and a crown beam 170 wrapping the top outer wall of each grouting pipe 200 is constructed, wherein the crown beam 170 is made of cement paste, has the width of 200mm and the height of 100mm; the flow requirement of the plain cement is met when the crown beam 170 is constructed, so that the plain cement slurry can flow into each grouting pipe 200 along the crown beam 170 by only supplying the slurry to one end of the crown beam 170 during grouting;
the drain pipes 210 are constructed so that each drain pipe 210 extends from the inner wall of the foundation pit 100 to the interlayer water area 120. When the drainage pipes 210 are arranged, the drainage pipes 210 are uniformly arranged along the middle part of the support piles 110 at the outer side of the foundation pit 100, the drainage pipes 210 are arranged at intervals along the length direction of the foundation pit 100, the arrangement quantity of the drainage pipes 210 is determined according to the diameter of the selected drainage pipes 210 and the spacing between the support piles 110, the top of each drainage pipe 210 is provided with drainage holes 211 at intervals to serve as drainage sections, and the bottom of each drainage pipe 210 is not provided with a hole-free section, so that the drainage pipe 210 is prevented from being blocked by slurry near the bottom of the grouting pipe 200 and the water in the foundation pit 100 fully flows into the top of the drainage pipe 210 to be discharged, the outer wall of each drainage pipe 210 is also provided with three positioning rings 212 which are arranged at intervals along the axial direction of the drainage pipe 210, the positioning rings 212 can be convenient for operators to determine the depth of the drainage pipe 210 inserted into the inner wall of the foundation pit 100, the relative distance between the drainage pipe 210 and the grouting pipe 200 is ensured, the water blocking layer poured by the grouting pipe 200 is prevented from entering the water source 130 in the water-filled region 120, and the water blocking the drainage holes 211 are prevented from being blocked by the slurry poured by the grouting pipe 200; when the drain pipe 210 is installed, the drain pipe 210 is arranged at an inclination angle alpha with the horizontal plane, the inclination angle alpha is preferably 10-15 degrees according to the longitudinal center line of the drain pipe 210 and the lower edge line of the permeable layer, when the drain pipe 210 is adopted for self-drainage, one end of the drain pipe 210 extending into the foundation pit 100 extends downwards, and when the drain pipe 210 is installed, a direct jack can be used for avoiding hole leading as far as possible, and hole sinking or water gushing is easily caused by the hole leading;
after the water drain pipe 210 is installed, the steel mesh 180 is paved on the vertical surface of the inner side wall of the foundation pit 100, cement mortar is smeared on the surface and fixed, and the thickness of the cement mortar is slightly lower than that of the water drain pipe 210, so that water drain is facilitated;
grouting is carried out in the interlayer water area 120 through each grouting pipe 200, and the poured slurry is solidified to form a water blocking layer to prevent the water source 130 in the interlayer water area from entering the interlayer water area 120, wherein the grouting slurry can be plain cement slurry. In the non-emergency situation, intermittent grouting is adopted for grouting, grouting is stopped after a certain amount of cement paste is poured, the drainage condition of the drainage pipe 210 is observed, grouting can be performed again when the drainage is large, urgent and no weakening sign exists, repeated observation is performed, and grouting can be stopped when the drainage is small and slow; if the emergency situation can adopt continuous grouting, when the top of the grouting pipe 200 returns to the upper direction, stopping grouting; the displacement monitoring work of the support pile 110 is maintained during grouting, and grouting is stopped when the displacement of the support pile 110 is suddenly increased or the deformation rate of the support pile 110 is suddenly increased;
after grouting, because the non-porous section of the drain pipe 210 is roughened, cement paste can be quickly bonded with the non-porous section of the drain pipe 210, so that the drain pipe 210 is fixed in soil;
as shown in fig. 3, under the condition that the foundation pit 100 is exposed, a drain 190 is built at the bottom of the inside of the foundation pit 100, and water discharged from the drain 210 is discharged through the drain 190; as shown in fig. 8, the vacuum pump 300 is used to directly pump the interlayer water without draining the water in the foundation pit 100 by communicating with each drain pipe 210 using the communicating pipe 310, and negative pressure is formed in the drain pipe 210 to facilitate pumping and draining.
As shown in fig. 9, 10 and 11, in other alternative embodiments, before the drain pipe 210 is installed, a protective pipe 220 may be sleeved on the outer wall of the drain pipe 210 for installation, and before the drain pipe 210 and the protective pipe 220 are installed, a layer of lubricant or a spacer may be coated on the outer wall of the protective pipe 220, so that after the cement slurry injected into the interlayer water region 120 by the grouting pipe 200 is finally set, the protective pipe 220 is slid along the drain pipe 210 for separation and extraction from the final set cement slurry; the bottom of the protection pipe 220 is contracted to form a contracted end 221 attached to the outer wall of the drain pipe 210, and the contracted end 221 prevents cement slurry from blocking the drain hole of the drain pipe 210; after the protective tube 220 is taken out, whether the opening of the drain tube 210 is damaged is observed, and the reinforcing mesh 180 and cement paste should be repaired in time when the damage occurs.
The embodiments described above are some, but not all, of the embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Claims (10)
1. The construction method for treating the interlayer water of the impermeable layer on the side wall of the foundation pit is characterized by comprising the following steps:
determining an interlayer water area outside the foundation pit and a water source of the interlayer water area;
penetrating a plurality of grouting pipes from the top of the interlayer water area to the interlayer water area respectively, and penetrating a plurality of drain pipes from the inner wall of the foundation pit to the interlayer water area respectively;
grouting the interlayer water area by using the grouting pipe, pouring a water blocking layer in the interlayer water area, and discharging water in the interlayer water area through the drain pipe; the water blocking layer is used for blocking water sources in the interlayer water area from entering the interlayer water area.
2. The method for treating water-impermeable layer interlayer water on the side wall of a foundation pit according to claim 1, wherein before grouting the interlayer water area, a crown beam is poured on the ground to wrap and connect the top ends of the grouting pipes.
3. The construction method for treating interlayer water of a water impermeable layer on a side wall of a foundation pit according to claim 1, wherein a plurality of grouting pipes are arranged at intervals along the length direction of the interlayer water area, and the distance between two adjacent grouting pipes is 1.5-2 times the slurry diffusion radius of the grouting pipes injected into the interlayer water area.
4. The method according to claim 1, wherein a slidable protective tube is sleeved on the outer wall of the drain pipe to seal the drain pipe before the drain pipe penetrates from the inner wall of the foundation pit to the interlayer water area, and after a water blocking layer is formed in the interlayer water area by pouring, the protective tube is pulled out of the interlayer water area to drain the drain pipe from the interlayer water area.
5. The method according to claim 4, wherein the outer wall of the protective tube is coated with a lubricant or a spacer to pull out the protective tube from the water blocking layer and the water blocking layer after the slurry injected into the water blocking layer is solidified.
6. The construction method for treating interlayer water of a side wall impermeable layer of a foundation pit according to claim 1, wherein after the drain pipes are penetrated to the interlayer water area, cement mortar is applied to fix the drain pipes after a reinforcing mesh is laid on the inner wall of the foundation pit.
7. The method according to claim 1, wherein when grouting is performed to the region of the water layer using the grouting pipe, grouting is stopped when the grouting pipe returns, the displacement of the foundation pit support pile suddenly increases, or the deformation rate of the foundation pit support pile suddenly increases.
8. The construction method for treating interlayer water of a side wall impermeable layer of a foundation pit according to claim 1, wherein a drain is constructed at the bottom of the inner side of the foundation pit, and water discharged from the drain is discharged through the drain.
9. The method for treating water in an interlayer of a side wall of a foundation pit according to claim 1, wherein water in each of the drain pipes is pumped out and discharged through a communicating pipe by using a water pump.
10. The construction method for treating the interlayer water of the impermeable layer of the side wall of the foundation pit according to claim 1, wherein the water draining pipe is arranged at an angle of 10-15 degrees with the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310469471.6A CN116556310A (en) | 2023-04-26 | 2023-04-26 | Construction method for treating interlayer water of impermeable layer on side wall of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310469471.6A CN116556310A (en) | 2023-04-26 | 2023-04-26 | Construction method for treating interlayer water of impermeable layer on side wall of foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116556310A true CN116556310A (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310469471.6A Pending CN116556310A (en) | 2023-04-26 | 2023-04-26 | Construction method for treating interlayer water of impermeable layer on side wall of foundation pit |
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2023
- 2023-04-26 CN CN202310469471.6A patent/CN116556310A/en active Pending
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