CN111663545A - Construction method for supporting impervious weak soil body with slope micro-expansion - Google Patents
Construction method for supporting impervious weak soil body with slope micro-expansion Download PDFInfo
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- CN111663545A CN111663545A CN202010587384.7A CN202010587384A CN111663545A CN 111663545 A CN111663545 A CN 111663545A CN 202010587384 A CN202010587384 A CN 202010587384A CN 111663545 A CN111663545 A CN 111663545A
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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
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- 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
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention relates to the technical field of building construction, in particular to a side slope micro-expansion waterproof weak soil body support construction method. According to the invention, the surface strength of the weak soil body can be enhanced by drilling anchor rods on the leveled ground, injecting cement paste and laying steel plates, the bottom strength of the steps is enhanced by hanging net pieces on the slope inclined planes of the step slopes and the bottom planes of the slope inclined planes, and spraying concrete paste, and the firmness of the lowest step slope is enhanced by arranging the groove steel piles and the connecting steel plates.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for supporting a side slope micro-expansion waterproof weak soil body.
Background
The horizontal plane of the upper part of the step slope is called an upper flat disc of the step, the horizontal plane of the lower part of the step is called a lower flat disc of the step, and the inclined plane between the upper flat disc and the lower flat disc is called a step slope. The intersection line of the upper flat disc of the step and the slope is called a step crest line; the intersection line of the lower flat disc and the slope is called a step slope bottom line; the vertical distance between the upper flat plate and the lower flat plate of the step is called the height of the step.
The weak soil body refers to silt, mucky soil, partial filling soil, miscellaneous filling soil and other high-compressibility soil. A foundation consisting of weak soil is called a weak soil foundation. The silt and the mucky soil are generally called soft soil in engineering, and have special physical and mechanical properties, so that the special engineering properties are caused. The weak soil has the characteristics of high natural water content, large natural pore ratio, low shear strength, high compression coefficient and small permeability coefficient. The foundation bearing capacity under the action of external load is low, the foundation deformation is large, the uneven deformation is also large, and the deformation stability lasts for a long time.
In order to ensure the firmness of the step side slope of the existing side slope micro-expansion impermeable weak soil support, the existing conventional side slope micro-expansion impermeable weak soil support mode only can excavate an inclined plane with the depth of 1-1.5m step height at a single time, and the stage number of the step can only reach a second stage step, so that the excavation depth of the whole weak soil is limited, and the diversity of construction on the weak soil is limited.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a supporting construction method for a slope micro-expansion impermeable weak soil body, which can enhance the surface strength of the weak soil body by drilling anchor rods on the leveled ground, injecting cement paste, laying steel plates, hanging net pieces on the slope of a step slope and the bottom plane of the slope, spraying concrete paste to enhance the bottom strength of the step, enhancing the firmness of the lowest step slope by arranging channel steel piles and connecting steel plates thereof, and compared with the conventional supporting mode for the slope micro-expansion impermeable weak soil body, the operation mode improves the excavation depth and strength of the soil body and provides guarantee for the diversity of the construction of the weak soil body.
The purpose of the invention can be realized by the following technical scheme:
the construction method of the slope micro-expansion impermeable weak soil body support comprises the following steps:
the method comprises the following steps: according to the requirements of a step slope design drawing, leveling a plane to be excavated, placing a step slope contour line on the leveled ground, placing a step slope outer contour line with a specified width on the periphery of the step slope contour line, then drilling an anchor rod between the step slope contour line and the step slope outer contour line, injecting cement paste, and laying a steel plate between the step slope contour line and the step slope outer contour line;
step two: according to the requirements of a step slope design drawing, digging first step slope earthwork according to a step slope contour line, meanwhile, digging the bottom of a first step slope, then repairing a first step slope inclined plane, drilling an anchor rod on the first step slope inclined plane, injecting cement paste, hanging a net piece on the first step slope inclined plane and a bottom plane of the first step slope inclined plane, and spraying concrete paste;
step three: placing a second step side slope line, digging a second step side slope earthwork, simultaneously digging the bottom of the second step side slope flat, then repairing a second step side slope inclined plane, drilling an anchor rod on the second step side slope inclined plane, injecting cement paste, hanging a net piece on the second step side slope inclined plane and the bottom plane thereof, and spraying concrete paste;
step four: placing a third step side slope line, digging earthwork of the third step side slope, repairing a slope of the third step side slope, drilling an anchor rod on the slope of the third step side slope, injecting cement paste, hanging a net piece on the slope of the third step side slope, and spraying concrete paste;
step five: mounting channel steel piles with a specified depth at the bottom of the slope of the third step slope by using a pile driver, then driving an anchor rod between two adjacent channel steel piles, and injecting cement paste;
step six: connecting a steel plate between two channel steel piles positioned on the upper part of the slope surface of the third step side, and welding and fixing the steel plate and the channel steel piles;
step seven: and (3) backfilling soil between the slope surface of the third step side and the steel plate, compacting by using a digging machine, compacting and grouting immediately after compaction, so that the soil is solidified and compacted to form a whole.
The depth of the anchor rod in the first step is 0.8-1.0m, and the depth can improve the soil body strength of the excavation plane near the excavation outline.
And further, the soil body is backfilled layer by layer in the seventh step, the single-layer backfilling depth is 0.3-0.4m, and the soil body compactness can be further improved by adopting the backfilling soil body mode.
Further, the depth range of the first step side slope is 1-2m, the depth range of the second step side slope is 0.8-1.5m, the depth range of the third step side slope is 0.6-1.2m, and the excavation depth ensures the stability of each step side slope.
Further, when the depth of the first step side slope is 1-1.3m, the designated width in the first step is 1.5-2m, and the designated width range can ensure the stability of the first step side slope.
Further, when the depth of the first step side slope is 1.3-1.6m, the designated width in the first step is 1.8-2.4m, and the designated width range can ensure the stability of the first step side slope.
Further, when the depth of the first step side slope is 1.6-2m, the designated width in the first step is 2.2-2.8m, and the designated width range can ensure the stability of the first step side slope.
And further, in the fifth step, the length of the channel steel pile is 3m, the length of the channel steel pile in the bottom surface is 1.8m, and the depth can ensure the strength of the channel steel pile and the connected steel plate.
The invention has the beneficial effects that:
1. placing a step slope contour line on the leveled ground, placing a step slope outer contour line with a specified width at the periphery of the step slope contour line, then drilling an anchor rod between the step slope contour line and the step slope outer contour line, injecting cement paste, laying a steel plate between the step slope contour line and the step slope outer contour line, hanging a mesh piece on the slope surface of the step slope and the bottom plane of the slope surface of the step slope, spraying concrete paste, connecting the steel plate between two channel steel piles positioned at the upper part of the slope surface of the third step slope, welding and fixing the steel plate and the channel steel piles, simultaneously backfilling soil between the slope surface of the third step slope and the steel plate, compacting and grouting by using a digging machine, compacting and grouting after following the steel piles, so as to form a whole body, thus the surface strength of the soft soil can be enhanced by drilling the anchor rod on the leveled ground, injecting cement paste, laying the steel plate, hanging the mesh piece on the slope surface of the step slope, concrete grout is sprayed to improve the strength of the bottom of the step, the firmness of the step side slope at the lowest layer is enhanced by arranging the groove steel piles and the connecting steel plates thereof, and compared with the conventional side slope micro-expansion waterproof weak soil body supporting mode, the operation mode improves the soil body excavation depth and strength and provides guarantee for the diversity of the construction of the weak soil body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The construction method of the slope micro-expansion impermeable weak soil body support comprises the following steps:
the method comprises the following steps: according to the requirements of a step slope design drawing, leveling a plane to be excavated, placing a step slope contour line on the leveled ground, when the depth of a first step slope is 1-1.3m, placing a step slope outer contour line with a specified width of 1.5-2m at the periphery of the step slope contour line, then drilling an anchor rod between the step slope contour line and the step slope outer contour line, wherein the depth of the anchor rod is 0.8-1.0m, injecting cement slurry, and laying a steel plate between the step slope contour line and the step slope outer contour line;
step two: according to the requirements of a step slope design drawing, digging first step slope earthwork according to a step slope contour line, meanwhile, digging the bottom of a first step slope, then repairing a first step slope inclined plane, drilling an anchor rod on the first step slope inclined plane, injecting cement paste, hanging a net piece on the first step slope inclined plane and a bottom plane of the first step slope inclined plane, and spraying concrete paste;
step three: placing a second step side slope line, wherein the depth range of the second step side slope is 0.8-1.5m, digging earthwork of the second step side slope, simultaneously digging the bottom of the second step side slope flat, then repairing the slope of the second step side slope, drilling an anchor rod on the slope of the second step side slope, injecting cement paste, hanging a net piece on the slope of the second step side slope and the bottom plane thereof, and spraying concrete paste;
step four: placing a third step slope line, wherein the depth range of the third step slope is 0.6-1.2m, digging earthwork of the third step slope, repairing the slope of the third step slope, drilling an anchor rod on the slope of the third step slope, injecting cement paste, hanging a net piece on the slope of the third step slope, and spraying concrete paste;
step five: installing channel steel piles with a specified depth at the bottom of the slope of the third step by using a pile driver, wherein the length of each channel steel pile is 3m, the length of each channel steel pile in the bottom surface is 1.8m, the depth can ensure the strength of each channel steel pile and a steel plate connected with the channel steel pile, and then driving an anchor rod between two adjacent channel steel piles and injecting cement paste;
step six: connecting a steel plate between two channel steel piles positioned on the upper part of the slope surface of the third step side, and welding and fixing the steel plate and the channel steel piles;
step seven: and (3) backfilling soil between the slope surface of the third step side and the steel plate in a mode of filling layer by layer, wherein the single-layer filling depth is 0.3-0.4m, compacting by using an excavator, and compacting and grouting immediately after compacting to solidify and compact the soil to form a whole.
Example two
The construction method of the slope micro-expansion impermeable weak soil body support comprises the following steps:
the method comprises the following steps: according to the requirements of a step slope design drawing, leveling a plane to be excavated, placing a step slope contour line on the leveled ground, when the depth of a first step slope is 1-1.3m, placing a step slope outer contour line with a specified width of 1.8-2.4m at the periphery of the step slope contour line, then drilling an anchor rod between the step slope contour line and the step slope outer contour line, wherein the depth of the anchor rod is 0.8-1.0m, injecting cement paste, and laying a steel plate between the step slope contour line and the step slope outer contour line;
step two: according to the requirements of a step slope design drawing, digging first step slope earthwork according to a step slope contour line, meanwhile, digging the bottom of a first step slope, then repairing a first step slope inclined plane, drilling an anchor rod on the first step slope inclined plane, injecting cement paste, hanging a net piece on the first step slope inclined plane and a bottom plane of the first step slope inclined plane, and spraying concrete paste;
step three: placing a second step side slope line, wherein the depth range of the second step side slope is 0.8-1.5m, digging earthwork of the second step side slope, simultaneously digging the bottom of the second step side slope flat, then repairing the slope of the second step side slope, drilling an anchor rod on the slope of the second step side slope, injecting cement paste, hanging a net piece on the slope of the second step side slope and the bottom plane thereof, and spraying concrete paste;
step four: placing a third step slope line, wherein the depth range of the third step slope is 0.6-1.2m, digging earthwork of the third step slope, repairing the slope of the third step slope, drilling an anchor rod on the slope of the third step slope, injecting cement paste, hanging a net piece on the slope of the third step slope, and spraying concrete paste;
step five: installing channel steel piles with a specified depth at the bottom of the slope of the third step by using a pile driver, wherein the length of each channel steel pile is 3m, the length of each channel steel pile in the bottom surface is 1.8m, the depth can ensure the strength of each channel steel pile and a steel plate connected with the channel steel pile, and then driving an anchor rod between two adjacent channel steel piles and injecting cement paste;
step six: connecting a steel plate between two channel steel piles positioned on the upper part of the slope surface of the third step side, and welding and fixing the steel plate and the channel steel piles;
step seven: and (3) backfilling soil between the slope surface of the third step side and the steel plate in a mode of filling layer by layer, wherein the single-layer filling depth is 0.3-0.4m, compacting by using an excavator, and compacting and grouting immediately after compacting to solidify and compact the soil to form a whole.
The construction method of the slope micro-expansion impermeable weak soil body support comprises the following steps:
the method comprises the following steps: according to the requirements of a step slope design drawing, leveling a plane to be excavated, placing a step slope contour line on the leveled ground, when the depth of a first step slope is 1.6-2m, placing a step slope outer contour line with a specified width of 2.2-2.8m at the periphery of the step slope contour line, then drilling an anchor rod between the step slope contour line and the step slope outer contour line, wherein the depth of the anchor rod is 0.8-1.0m, injecting cement paste, and laying a steel plate between the step slope contour line and the step slope outer contour line;
step two: according to the requirements of a step slope design drawing, digging first step slope earthwork according to a step slope contour line, meanwhile, digging the bottom of a first step slope, then repairing a first step slope inclined plane, drilling an anchor rod on the first step slope inclined plane, injecting cement paste, hanging a net piece on the first step slope inclined plane and a bottom plane of the first step slope inclined plane, and spraying concrete paste;
step three: placing a second step side slope line, wherein the depth range of the second step side slope is 0.8-1.5m, digging earthwork of the second step side slope, simultaneously digging the bottom of the second step side slope flat, then repairing the slope of the second step side slope, drilling an anchor rod on the slope of the second step side slope, injecting cement paste, hanging a net piece on the slope of the second step side slope and the bottom plane thereof, and spraying concrete paste;
step four: placing a third step slope line, wherein the depth range of the third step slope is 0.6-1.2m, digging earthwork of the third step slope, repairing the slope of the third step slope, drilling an anchor rod on the slope of the third step slope, injecting cement paste, hanging a net piece on the slope of the third step slope, and spraying concrete paste;
step five: installing channel steel piles with a specified depth at the bottom of the slope of the third step by using a pile driver, wherein the length of each channel steel pile is 3m, the length of each channel steel pile in the bottom surface is 1.8m, the depth can ensure the strength of each channel steel pile and a steel plate connected with the channel steel pile, and then driving an anchor rod between two adjacent channel steel piles and injecting cement paste;
step six: connecting a steel plate between two channel steel piles positioned on the upper part of the slope surface of the third step side, and welding and fixing the steel plate and the channel steel piles;
step seven: and (3) backfilling soil between the slope surface of the third step side and the steel plate in a mode of filling layer by layer, wherein the single-layer filling depth is 0.3-0.4m, compacting by using an excavator, and compacting and grouting immediately after compacting to solidify and compact the soil to form a whole.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. The construction method for supporting the side slope micro-expansion impermeable weak soil body is characterized by comprising the following steps:
the method comprises the following steps: according to the requirements of a step slope design drawing, leveling a plane to be excavated, placing a step slope contour line on the leveled ground, placing a step slope outer contour line with a specified width on the periphery of the step slope contour line, then drilling an anchor rod between the step slope contour line and the step slope outer contour line, injecting cement paste, and laying a steel plate between the step slope contour line and the step slope outer contour line;
step two: according to the requirements of a step slope design drawing, digging first step slope earthwork according to a step slope contour line, meanwhile, digging the bottom of a first step slope, then repairing a first step slope inclined plane, drilling an anchor rod on the first step slope inclined plane, injecting cement paste, hanging a net piece on the first step slope inclined plane and a bottom plane of the first step slope inclined plane, and spraying concrete paste;
step three: placing a second step side slope line, digging a second step side slope earthwork, simultaneously digging the bottom of the second step side slope flat, then repairing a second step side slope inclined plane, drilling an anchor rod on the second step side slope inclined plane, injecting cement paste, hanging a net piece on the second step side slope inclined plane and the bottom plane thereof, and spraying concrete paste;
step four: placing a third step side slope line, digging earthwork of the third step side slope, repairing a slope of the third step side slope, drilling an anchor rod on the slope of the third step side slope, injecting cement paste, hanging a net piece on the slope of the third step side slope, and spraying concrete paste;
step five: mounting channel steel piles with a specified depth at the bottom of the slope of the third step slope by using a pile driver, then driving an anchor rod between two adjacent channel steel piles, and injecting cement paste;
step six: connecting a steel plate between two channel steel piles positioned on the upper part of the slope surface of the third step side, and welding and fixing the steel plate and the channel steel piles;
step seven: and (3) backfilling soil between the slope surface of the third step side and the steel plate, compacting by using a digging machine, compacting and grouting immediately after compaction, so that the soil is solidified and compacted to form a whole.
2. The slope micro-expansion watertight weak soil body support construction method according to claim 1, wherein the depth of the anchor rod in the step one is 0.8-1.0 m.
3. The slope micro-expansion watertight weak soil body support construction method according to claim 1, wherein the soil body is backfilled layer by layer in the seventh step, and the single-layer backfilling depth is 0.3-0.4 m.
4. The slope micro-expansion watertight weak soil support construction method according to claim 1, wherein the depth range of the first step slope is 1-2m, the depth range of the second step slope is 0.8-1.5m, and the depth range of the third step slope is 0.6-1.2 m.
5. The method for supporting and constructing a side slope micro-expansion impermeable weak soil body according to claim 4, wherein when the depth of the first step side slope is 1-1.3m, the designated width in the step one is 1.5-2 m.
6. The slope micro-expansion watertight weak soil support construction method according to claim 4, wherein when the depth of the first step slope is 1.3-1.6m, the specified width of the step one is 1.8-2.4 m.
7. The method for supporting and constructing a side slope micro-expansion impermeable weak soil body according to claim 1, wherein when the depth of the first step side slope is 1.6-2m, the specified width in the step one is 2.2-2.8 m.
8. The slope micro-expansion watertight weak soil body support construction method according to claim 1, wherein the length of the channel steel pile in the fifth step is 3m, and the length of the channel steel pile placed in the bottom surface is 1.8 m.
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| CN202010587384.7A CN111663545A (en) | 2020-06-24 | 2020-06-24 | Construction method for supporting impervious weak soil body with slope micro-expansion |
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| CN110761300A (en) * | 2019-11-08 | 2020-02-07 | 中国十七冶集团有限公司 | Construction method for supporting impervious soft soil body on side slope of deep foundation pit of high-rise building through micro-expansion |
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100715098B1 (en) * | 2005-12-23 | 2007-05-07 | 김선자 | Shoring structure |
| CN102561358A (en) * | 2010-12-22 | 2012-07-11 | 中国建筑第七工程局有限公司 | Construction method of ahead mini type composite soil nail wall support |
| CN109487804A (en) * | 2018-12-06 | 2019-03-19 | 中铁二院工程集团有限责任公司 | The low disturbance reinforcement protection system of red soft rock cut slope and construction method |
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Application publication date: 20200915 |