CN113089687A - Slope protection method and device - Google Patents
Slope protection method and device Download PDFInfo
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- CN113089687A CN113089687A CN202110511969.5A CN202110511969A CN113089687A CN 113089687 A CN113089687 A CN 113089687A CN 202110511969 A CN202110511969 A CN 202110511969A CN 113089687 A CN113089687 A CN 113089687A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 238000004873 anchoring Methods 0.000 claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 239000010426 asphalt Substances 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 38
- 238000009412 basement excavation Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 235000009120 camo Nutrition 0.000 description 2
- 235000005607 chanvre indien Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011487 hemp Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- 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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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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
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/20—Restraining of underground water by damming or interrupting the passage of underground water by displacing the water, e.g. by compressed air
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/40—Miscellaneous comprising stabilising elements
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention provides a side slope protection method and a device, belonging to the technical field of building construction.A first-order slope surface excavated by a foundation pit is subjected to slope surface finishing, anchor rod hole drilling, anchor cable penetrating and anchor hole grouting operation is carried out according to the anchor rod drilling depth, drainage hole drilling operation is carried out, and a water collecting part of a drainage pipe is arranged in the drainage direction of the side slope; laying a prefabricated first-stage slope panel on the first-stage slope surface, and anchoring the first-stage slope panel by tensioning an anchor cable; the drainage part of the drainage pipe is connected with the water collecting part of the drainage pipe in compliance with the first-stage slope; and downward finishing the slope surface of the next step until the horizontal slope surface at the bottom of the foundation pit, and finishing slope protection. The slope construction of each step can be performed alternately with the excavation of the deep foundation pit, so that the construction period is effectively shortened; the prefabricated slope panel, the drain pipe and the anchorage device can be repeatedly used, and the technical effect of saving the construction cost of slope support is achieved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a side slope protection method and a side slope protection device.
Background
Along with the need of the urbanization development of China, more and more underground buildings need to be constructed in the urban construction process so as to save urban land, so that more and more deep foundation pits are excavated in the construction process. Whether the deep foundation pit side slope supporting structure design is reasonable and applicable not only directly influences the safety of engineering construction, but also can determine success or failure of whole engineering implementation in severe cases. Particularly, in deep foundation pits constructed in large and medium-sized cities, the displacement of side slopes can cause the settlement of surrounding foundations, further affect the settlement and inclination of surrounding buildings, and even cause disasters such as structural collapse after a long time.
The existing foundation pit construction method comprises slope enlarging excavation, pile row support, steel sheet pile support, soil nailing wall support, underground diaphragm wall support and the like, but has the following disadvantages:
1) the supporting construction can be carried out only after the excavation of the deep foundation pit is finished, so that the construction period is prolonged;
2) the drainage process is lacked, the side slope after the supporting construction needs to be sprayed again for fixation, and the consumption of concrete is large.
Therefore, a slope protection method with high construction efficiency is needed.
Disclosure of Invention
The invention aims to provide a side slope protection method and a side slope protection device which are high in construction efficiency and good in protection effect.
In order to achieve the purpose, the invention provides a side slope protection method for protecting a foundation pit slope body through a side slope protection device, which comprises the following steps:
s1, determining the graded layer number of the side slopes, the slope coefficient and the anchor rod drilling depth according to the side slope stability parameters, and performing slope surface finishing on the first-order slope surface of the foundation pit which is excavated according to the graded layer number of the side slopes and the slope coefficient;
s2, performing anchor rod hole drilling, anchor cable penetrating and anchor hole grouting operation on the first-order slope surface after finishing according to the anchor rod drilling depth; drilling a drainage hole on the first-order slope surface after the grouting of the anchor hole is finished, and installing a water collecting part of a drainage pipe in the drainage direction of the side slope;
s3, laying a prefabricated first-stage slope panel on the first-stage slope surface, and stretching an anchor cable to anchor the first-stage slope panel;
s4, connecting the drainage part of the drainage pipe with the water collection part of the drainage pipe according to the first-stage slope;
s5, downward finishing the slope surface of the next step until reaching the horizontal slope surface at the bottom of the foundation pit; and the drainage part of the drainage pipe of the horizontal slope surface at the bottom of the foundation pit is connected with the water collecting well at the bottom of the foundation pit.
Further, preferably, surface deformation monitoring and depth deformation monitoring are carried out on the slope body of the side slope, when the displacement data of the side slope exceeds a side slope displacement threshold value and/or when the prestress exceeds a prestress threshold value, the current slope is judged to be a deformed slope, and secondary tensioning and anchoring are carried out on the deformed slope.
Further, it is preferable that, after the step S4, a step of filling the patchwork of the first-step slope panel be further included.
Further, preferably, the method of patchwork filling comprises filling asphalt rope or pouring asphalt.
Further, preferably, the water collecting part of the drain pipe is a pipe body with water permeable holes uniformly distributed on the semicircular surface; wherein, the semicircular surface provided with the permeable hole faces the drainage direction of the side slope.
Further, it is preferable that a water blocking wall for preventing water from overflowing from the intercepting drain is provided at the top of the foundation pit.
In order to achieve the purpose, the invention also provides a side slope protection device, which comprises a plurality of steps of slope surfaces arranged according to the graded layer number and the slope coefficient of the side slope, slope panels paved on the slope surfaces of the steps, a prestressed anchoring device and a drainage device, wherein the slope surfaces of the steps comprise a horizontal slope surface arranged at the bottom of the foundation pit, a first step slope surface arranged at the top of the foundation pit and a middle step slope surface arranged between the horizontal slope surface and the first step slope surface;
fixing the slope panel on each prefabricated slope surface on the corresponding slope surface through the prestressed anchoring device;
the drainage device comprises a drainage pipe and a water collecting well arranged at the bottom of the foundation pit; the drainage pipe comprises a water collecting part of the drainage pipe arranged in the side slope water drainage direction and a drainage pipe water collecting part conforming to slope surface installation of each step, and the drainage part of the drainage pipe corresponding to the horizontal slope surface is connected with the water collecting well.
Further, preferably, a plugging agent is arranged in the joints of the adjacent slope panels, and the plugging agent is asphalt hemp ropes or asphalt.
Further, preferably, the water collecting part of the drain pipe is a pipe body with water permeable holes uniformly distributed on the semicircular surface; wherein, the semicircular surface provided with the water permeable holes faces the water drainage direction of the side slope.
Further, it is preferable that a water blocking wall for preventing water from overflowing from the intercepting drain is provided at the top of the foundation pit.
According to the slope protection method and device, the foundation pit slope is protected through the slope protection device; the beneficial effects are as follows:
1) the slope panel is prefabricated, and slope construction of each step can be performed alternately with deep foundation pit excavation, so that the construction period is effectively shortened;
2) the prefabricated slope panel, the drain pipe and the anchorage device can be reused, so that the construction cost of the slope support is saved;
3) if slope displacement appears in the construction process, only prestress secondary tensioning anchoring is needed, complex construction procedures such as retaining reinforcement and the like are not needed, construction safety is effectively controlled, and the construction period is shortened.
4) The method saves the link of spraying and fixing the supported side slope and reduces the using amount of concrete;
5) the supporting construction link does not need horizontal supporting, the construction space is large, mechanical construction such as an excavator can be fully utilized, and the construction efficiency is further improved.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic structural view of a slope protection apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a slope protection apparatus according to an embodiment of the present invention;
fig. 3 is a logic diagram of a slope protection method according to an embodiment of the present invention.
Wherein,
1. a first-order slope surface; 2. a slope panel; 3. a pre-stressed anchoring device; 4. a water collecting part of the drain pipe; 5. a drain part of the drain pipe; 6. a plugging agent; 7. a water retaining wall.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
According to the slope protection method and device, the foundation pit slope is protected through the slope protection device; the technical effects of high construction efficiency and good safety effect are achieved.
Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1-2 generally depict the construction of a side slope guard. Specifically, fig. 1 is a schematic structural view of a slope protection device according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of a slope protection device according to an embodiment of the present invention; as shown in the figures 1-2 of the drawings,
the multi-step slope surface comprises a plurality of step slope surfaces arranged according to the graded layer number and the slope coefficient of a side slope, slope panels 2 paved on the step slope surfaces, a prestressed anchoring device 3 and a drainage device, wherein the multi-step slope surfaces comprise a horizontal slope surface arranged at the bottom of a foundation pit, a first step slope surface 1 arranged at the top of the foundation pit and a middle step slope surface arranged between the horizontal slope surface and the first step slope surface; fixing each prefabricated slope panel on each slope surface through the prestressed anchoring device 3; the drainage device comprises a drainage pipe and a water collecting well arranged at the bottom of the foundation pit; the drainage pipe comprises a water collecting part 4 of the drainage pipe arranged in the side slope drainage direction and a drainage pipe water collecting part 5 conforming to slope surface installation of each step, and the drainage part of the drainage pipe corresponding to the horizontal slope surface is connected with the water collecting well.
Specifically, the foundation pit is excavated from top to bottom in sequence from outside to inside step by step, and the slope stability is ensured according to the principle of 'excavation while protection'. The construction process of slope protection comprises the steps of firstly, determining technical parameters such as the number of graded layers of a slope, a slope coefficient, the drilling depth of an anchor rod and the like by calculating the stability of the slope before excavation of a foundation pit; excavating foundation pits in sequence, and after finishing a first-stage slope surface closest to the top of the foundation pit, performing construction such as anchor rod hole drilling, anchor cable penetrating, anchor hole grouting and the like on the finished first-stage slope surface; in addition, a water collecting part for drilling a drain hole and installing a drain pipe is constructed on the first-stage slope; then, mounting the prefabricated slope panel of the first step on the slope surface of the first step, and stretching and anchoring the anchor cables to fix the slope panel of the first step; after the first-step slope panel is fixed on the first-step slope surface, a drainage part of a drainage pipe is arranged along the slope direction; carrying out anchor cable support system closed loop on the prestressed anchoring device corresponding to the first step; then, excavating a second layer of earthwork according to indexes such as the predetermined graded layer number of the side slope and the like; further completing the pre-stressed anchoring device of the second-order slope surface according to the process to carry out anchor cable supporting system closed loop; and (4) until the water reaches the horizontal slope surface at the bottom of the foundation pit, installing a prefabricated slope panel in the horizontal direction on the horizontal slope surface, attaching the drainage part of the drainage pipe to the water collecting well for centralized drainage, and finishing the slope protection process. It should be noted that, for anchoring of the slope panel, the anchor cable is a high-strength low-relaxation steel strand. The length of the anchor cable consists of an anchoring section, a free section and a tensioning section. Wherein, the free section adopts HOPE casing pipe to keep apart the protection.
In the specific implementation process, in order to further improve the stability of slope protection, surface deformation monitoring and depth deformation monitoring are carried out on a slope body of a slope, when the slope displacement data exceeds a slope displacement threshold value and/or when the prestress exceeds a prestress threshold value, the current slope is judged to be a deformed slope, and secondary tensioning and anchoring are carried out on the deformed slope. That is to say, the underground structure thing work progress reinforcement is detected slope displacement and prestressing force, if appear slope displacement or prestressing force when losing can carry out the secondary stretch-draw anchor. Slope displacement data are generally measured, recorded and analyzed every day by arranging a plurality of groups of displacement observation points and a plurality of groups of settlement observation points which are formed by level gauges on the periphery of a foundation pit, and a slope displacement threshold value is generally set to be 20 mm.
In the concrete implementation process, after the side slope support of the foundation pit is completed, the prefabricated slabs and the drainage pipes are laid in layers and detached for recycling next time, and then earth is backfilled in layers until the foundation pit is backfilled.
In a specific embodiment, the water collecting part 4 of the drain pipe is a pipe body with water permeable holes uniformly distributed on the semicircular surface; wherein, the semicircular surface provided with the water permeable holes faces the water drainage direction of the side slope. As a modification of this embodiment, a water blocking wall 7 for preventing water from overflowing from the catch basin is provided at the top of the foundation pit. Specifically, the side slope protection device comprises a complete and effective drainage system, wherein the drainage system comprises a water retaining wall 7 at the highest position, a drainage pipe arranged along the side slope and a water collecting well arranged at the bottom of a foundation pit; the overflow water of the side slope reaches the water collecting well through the drain pipe, and then the water in the water collecting well is drained in a centralized manner through the drainage equipment. By arranging the multi-level drainage structure, various drainage structures are combined to form a complete drainage system. Realize stable, smooth and easy drainage, and then can play the effect of side slope drainage, finally reach the effect that promotes side slope stability.
In a specific implementation, in order to further increase the stability of the slope, a filler 6 is provided in the joints of adjacent slope panels, the filler being asphalt rope or asphalt.
Fig. 3 illustrates the slope protection method as a whole. Specifically, fig. 3 is a logic diagram of a slope protection method according to an embodiment of the present invention; as shown in figure 3 of the drawings,
a side slope protection method for protecting a foundation pit slope body through a side slope protection device comprises the following steps:
and S1, determining the graded layer number of the side slopes, the slope coefficient and the anchor rod drilling depth according to the side slope stability parameters, and performing slope surface finishing on the first-order slope surface of the foundation pit which is excavated according to the graded layer number of the side slopes and the slope coefficient. Wherein, be provided with the breakwater that is used for preventing the rivers of intercepting ditch from overflowing at the foundation ditch top.
S2, performing anchor rod hole drilling, anchor cable penetrating and anchor hole grouting operation on the first-order slope surface after finishing according to the anchor rod drilling depth; and drilling a drainage hole on the first-order slope surface after the grouting of the anchor hole is finished, and installing a water collecting part of a drainage pipe in the drainage direction of the side slope.
Wherein, the water collecting part of the drain pipe is a pipe body with water permeable holes uniformly distributed on the semicircular surface; wherein, the semicircular surface provided with the permeable hole faces the drainage direction of the side slope.
And S3, paving a prefabricated first-step slope panel on the first-step slope surface, and realizing the anchoring of the first-step slope panel by tensioning an anchor cable.
And S4, connecting the drainage part of the drainage pipe with the water collection part of the drainage pipe by following the first-step slope.
After step S4, a step of filling the seams of the first-step slope panel is also included. The seam filling mode comprises filling asphalt hemp ropes or pouring asphalt.
S5, downward finishing the slope surface of the next step until reaching the horizontal slope surface at the bottom of the foundation pit; and the drainage part of the drainage pipe of the horizontal slope surface at the bottom of the foundation pit is connected with the water collecting well at the bottom of the foundation pit.
And (3) monitoring surface deformation and depth deformation of the slope body of the slope, judging that the current slope is a deformed slope when the slope displacement data exceeds a slope displacement threshold and/or when the prestress exceeds a prestress threshold, and performing secondary tensioning and anchoring on the deformed slope.
The slope protection method provided by the invention corresponds to the slope protection device, and the specific implementation mode is the same as that of the slope protection device, so that the details are not repeated.
In summary, the invention relates to a slope protection method and a device, slope arrangement is carried out on a first-order slope surface excavated in a foundation pit according to the graded layer number of the slope and the coefficient of slope release by determining the graded layer number of the slope, the coefficient of slope release and the drilling depth of an anchor rod according to slope stability parameters; performing anchor rod hole drilling, anchor cable penetrating and anchor hole grouting operation on the first-stage slope surface after finishing according to the anchor rod drilling depth; drilling a drainage hole on the first-order slope surface after the grouting of the anchor hole is finished, and installing a water collecting part of a drainage pipe in the drainage direction of the side slope; laying a prefabricated first-stage slope panel on the first-stage slope surface, and anchoring the first-stage slope panel by tensioning an anchor cable; the drainage part of the drainage pipe is connected with the water collecting part of the drainage pipe in compliance with the first-stage slope; downward finishing the slope surface of the next step until reaching the horizontal slope surface at the bottom of the foundation pit; and the drainage part of the drainage pipe of the horizontal slope surface at the bottom of the foundation pit is connected with the water collecting well at the bottom of the foundation pit. The slope construction of each step can be performed alternately with the excavation of the deep foundation pit, so that the construction period is effectively shortened; the prefabricated slope panel, the drain pipe and the anchorage device can be reused, so that the construction cost of the slope support is saved; if slope displacement occurs in the construction process, only prestress secondary tensioning and anchoring is needed, complicated construction procedures such as enclosure reinforcement and the like are not needed, construction safety is effectively controlled, and the construction period is shortened; the method saves the link of spraying and fixing the supported side slope and reduces the using amount of concrete; the supporting construction link does not need horizontal supporting, the construction space is large, mechanical construction such as an excavator can be fully utilized, and the technical effect of further improving the construction efficiency is achieved.
However, it will be appreciated by those skilled in the art that various modifications may be made to the method and apparatus for slope protection provided by the present invention without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. A side slope protection method is characterized in that a foundation pit slope body is protected through a side slope protection device, and the method comprises the following steps:
s1, determining the graded layer number of the side slopes, the slope coefficient and the anchor rod drilling depth according to the side slope stability parameters, and performing slope surface finishing on the first-order slope surface of the foundation pit which is excavated according to the graded layer number of the side slopes and the slope coefficient;
s2, performing anchor rod hole drilling, anchor cable penetrating and anchor hole grouting operation on the first-order slope surface after finishing according to the anchor rod drilling depth; drilling a drainage hole on the first-order slope surface after the grouting of the anchor hole is finished, and installing a water collecting part of a drainage pipe in the drainage direction of the side slope;
s3, laying a prefabricated first-step slope panel on the first-step slope surface, and stretching the anchor cable to anchor the first-step slope panel;
s4, connecting the drainage part of the drainage pipe with the water collection part of the drainage pipe in compliance with the first-step slope surface;
s5, downward finishing the slope surface of the next step until reaching the horizontal slope surface at the bottom of the foundation pit; and the drainage part of the drainage pipe on the horizontal slope surface at the bottom of the foundation pit is connected with the water collecting well at the bottom of the foundation pit.
2. The side slope protection method according to claim 1, wherein surface deformation monitoring and depth deformation monitoring are performed on a slope body of the side slope, when the side slope displacement data exceeds a side slope displacement threshold value and/or when the prestress exceeds a prestress threshold value, the current slope is determined to be a deformed slope, and secondary tensioning and anchoring are performed on the deformed slope.
3. The method of claim 1, further comprising a step of caulking the first-step slope panel after the step S4.
4. The method of slope protection according to claim 3 wherein said patchwork filling method comprises filling asphalt rope or pouring asphalt.
5. The slope protection method according to claim 1, wherein the water collecting part of the water discharge pipe is a pipe body with water permeable holes uniformly distributed on a semicircular surface; wherein, the semicircular surface provided with the water permeable holes faces the water drainage direction of the side slope.
6. The method for protecting a side slope according to claim 1, wherein a water retaining wall for preventing water from overflowing from the catch basin is provided at the top of the foundation pit.
7. A side slope protection device is characterized by comprising multi-step slope surfaces which are arranged according to the graded layer number and the slope coefficient of a side slope, slope panels which are paved on the multi-step slope surfaces, a prestressed anchoring device and a drainage device, wherein the multi-step slope surfaces comprise horizontal slope surfaces which are arranged at the bottom of a foundation pit, first-step slope surfaces which are arranged at the top of the foundation pit and middle-step slope surfaces which are arranged between the horizontal slope surfaces and the first-step slope surfaces;
fixing the slope panel on each prefabricated slope surface on the corresponding slope surface through the prestressed anchoring device;
the drainage device comprises a drainage pipe and a water collecting well arranged at the bottom of the foundation pit; the drainage pipe comprises a water collecting part of the drainage pipe arranged in the side slope drainage direction and a drainage part of the drainage pipe which is in compliance with slope surface installation of each step, and the drainage part of the drainage pipe corresponding to the horizontal slope surface is connected with the water collecting well.
8. The slope protection device according to claim 7, wherein a filler is provided in the joints of adjacent slope panels, the filler being asphalt rope or asphalt.
9. The slope protection device according to claim 7, wherein the water collecting part of the water discharging pipe is a pipe body with water permeable holes uniformly distributed on a semicircular surface; wherein, the semicircular surface provided with the water permeable holes faces the water drainage direction of the side slope.
10. The slope protection device according to claim 7, wherein a water retaining wall for preventing water from overflowing from the intercepting drain is provided at the top of the foundation pit.
Priority Applications (1)
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| CN202110511969.5A CN113089687A (en) | 2021-05-11 | 2021-05-11 | Slope protection method and device |
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| CN202110511969.5A CN113089687A (en) | 2021-05-11 | 2021-05-11 | Slope protection method and device |
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| CN113089687A true CN113089687A (en) | 2021-07-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855813A (en) * | 2022-04-25 | 2022-08-05 | 唐山学院 | Foundation pit upper layer stagnant water precipitation slope support device and construction method |
| CN115217112A (en) * | 2022-08-10 | 2022-10-21 | 中建七局第二建筑有限公司 | Deep foundation pit construction method |
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| CN205314108U (en) * | 2016-01-22 | 2016-06-15 | 山东大学 | Compound soil nail wall supporting construction system with steel -pipe pile |
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| CN115217112A (en) * | 2022-08-10 | 2022-10-21 | 中建七局第二建筑有限公司 | Deep foundation pit construction method |
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Application publication date: 20210709 |