CN110761300B - Construction method for supporting impervious soft soil body on side slope of deep foundation pit of high-rise building through micro-expansion - Google Patents
Construction method for supporting impervious soft soil body on side slope of deep foundation pit of high-rise building through micro-expansion Download PDFInfo
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- CN110761300B CN110761300B CN201911085667.5A CN201911085667A CN110761300B CN 110761300 B CN110761300 B CN 110761300B CN 201911085667 A CN201911085667 A CN 201911085667A CN 110761300 B CN110761300 B CN 110761300B
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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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Abstract
The invention discloses a construction method for supporting a micro-expansion impermeable weak soil body of a side slope of a deep foundation pit of a high-rise building. The second or third step adopts an effective and recyclable construction method that transverse girding is welded on I-shaped steel or channel steel, and a bamboo springboard or an old wood template is added on the soil-facing surface to support, so that the supporting safety of the side slope of the micro-expansive impermeable weak soil body is ensured. The invention ensures that the construction of the deep foundation pit is safely, reliably and smoothly carried out. Meanwhile, the defects that the slightly-expanded impermeable soft soil body side slope melts and expands when meeting water, becomes very loose, loses adhesive force, supporting force and friction force and collapses downwards are overcome, the engineering cost is saved, and the economic benefit is improved.
Description
Technical Field
The invention relates to a construction method for supporting a micro-expansion impervious soft soil body of a deep foundation pit slope of a high-rise building, in particular to a construction method for supporting a micro-expansion impervious soft soil body of a deep foundation pit slope of a high-rise building.
Background
At present, when a high-rise building deep foundation pit side slope is supported, a slightly-expanded impermeable weak soil body is immediately melted and expanded when being soaked in an external water source, the soil body becomes very loose, has no adhesive force, no supporting force and no friction force, or the heel of the side slope soil body directly collapses downwards after being invaded by strong rainwater, and an effective construction method needs to be adopted under the conditions of heavy rain, light rain and continuous downward collapse after sunny days.
In the long-term practice of supporting the side slope of the deep foundation pit of the high-rise building by the micro-expansion impermeable soft soil body, the conventional habitually method is to increase the slope coefficient to 1:1 or 1:1:25, simultaneously increase the working operation surface, adopt the anchor rod to hang the net and spray the slurry for supporting, and finish the supporting as long as the absolute safety of the working surface is ensured. If the site is narrow, under the condition that the construction road is smooth and unobstructed, the combined action of the deep punching cast-in-place pile and the deep cement mixing pile curtain is adopted to form a supporting system so as to protect the foundation pit slope from being soaked by water and achieve the purposes of safety and reliability. However, this support system is very costly.
Therefore, only one simple and effective construction method is invented, which not only can ensure the safety and reliability of foundation pit construction, but also can ensure that the supporting cost is properly controlled, thereby achieving the purposes of reducing the cost and improving the economic benefit.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention aims at the defects and shortcomings of the conventional habitual slope support construction process technology. And (3) trimming the side slope into two or three steps, wherein the first step adopts an anchor rod hanging net guniting support construction method. The second or third step adopts an effective and recyclable construction method that transverse girding is welded on I-shaped steel or channel steel, and a bamboo springboard or an old wood template is added on the soil-facing surface to support, so that the supporting safety of the side slope of the micro-expansive impermeable weak soil body is ensured. The construction of the deep foundation pit is ensured to be carried out safely, reliably and smoothly. Meanwhile, the defects that the slightly-expanded impermeable soft soil body side slope melts and expands when meeting water, becomes very loose, loses adhesive force, supporting force and friction force and collapses downwards are overcome, the engineering cost is saved, and the economic benefit is improved.
In order to solve the technical problems, the inventor obtains the technical scheme of the invention through practice and summary, and the invention discloses a construction method for supporting a micro-expansion impermeable weak soil body on a side slope of a deep foundation pit of a high-rise building, which comprises the following steps:
the method comprises the following steps: according to the requirements of a side slope design drawing, a first step side slope line is placed, side slope earthwork is excavated, a first step side slope is repaired, anchor rods are arranged, cement paste is injected, net pieces are hung, and concrete paste is sprayed;
step two: placing a second step side slope line, digging side slope earthwork, repairing a second step side slope, bolting, injecting cement paste, hanging net pieces and spraying concrete paste;
step three: placing a third step slope line, excavating soil to repair a third step slope, utilizing a drilling machine to lead a hole to be 6.5m deep, installing an I-shaped steel or channel steel pile supporting pile, filling soil into the pile hole, compacting and grouting;
step four: welding transverse connecting steel bars on supporting I-shaped steel or channel steel piles, connecting the piles into a whole, commonly bearing the side pressure of the earthwork collapse, and installing a soil-retaining bamboo springboard or an old template;
step five: and backfilling the space earthwork between the soil retaining bamboo springboard or the old template and the side slope soil body, compacting by using a digging machine, and compacting and grouting after close connection to ensure that the soil body is solidified and compacted to form a whole.
Preferably, according to the requirements of a side slope design drawing, a first step side slope line is placed, side slope earthwork is dug, a first step side slope is repaired, anchor rods are drilled, and cement slurry is injected. And hanging the net sheets, and spraying and anchoring concrete slurry to complete the slope support of the first step section.
Preferably, the second step slope line is placed in the second step, slope earthwork is excavated, the second step slope is repaired, anchor rods are arranged, cement paste is injected, net pieces are hung, and concrete paste is sprayed to anchor, so that slope support of the second step section is completed.
Compared with the prior art, the invention can obtain the following technical effects:
1. the invention relates to a slope which is built into two or three steps, wherein the first step adopts an anchor rod hanging net guniting supporting construction method. The second or third step adopts an effective and recyclable construction method that transverse girding is welded on I-shaped steel or channel steel, and a bamboo springboard or an old wood template is added on the soil-facing surface to support, so that the supporting safety of the side slope of the micro-expansive impermeable weak soil body is ensured.
2. The invention ensures that the construction of the deep foundation pit is safely, reliably and smoothly carried out. Meanwhile, the defects that the slightly-expanded impermeable soft soil body side slope melts and expands when meeting water, becomes very loose, loses adhesive force, supporting force and friction force and collapses downwards are overcome, the engineering cost is saved, and the economic benefit is improved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a side schematic view of the present invention;
fig. 2 is a schematic front view of the present invention.
In the figure:
1. the hole-leading of the drilling machine is carried out,
2. an I-shaped steel pile or a channel steel pile,
3. the filling and the grouting are carried out,
4. a bamboo springboard or an old template for retaining soil,
5. the reinforcing steel bars are transversely connected with each other,
6. the first step section is used for supporting a side slope,
7. the second step section is used for supporting a side slope,
8. a third step side slope is arranged on the first step side slope,
9. the pile hole is arranged on the bottom of the pile body,
10. an anchor rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1-2: the construction method for supporting the side slope of the deep foundation pit of the high-rise building by the micro-expansion impervious soft soil body comprises the following steps:
the method comprises the following steps: according to the requirements of a side slope design drawing, a first step side slope line is placed, side slope earthwork is excavated, a first step side slope is repaired, an anchor rod 10 is anchored, cement paste is injected, a net piece is hung, and concrete slurry is sprayed;
step two: placing a second step side slope line, digging side slope earthwork, repairing a second step side slope, bolting an anchor rod 10, injecting cement paste, hanging a net piece and spraying concrete paste;
step three: placing a third step slope line, excavating soil to repair a third step slope 8, utilizing a drilling machine to lead a hole with the depth of 1 m to 6.5m, installing an I-shaped steel or channel steel pile supporting pile, filling soil into a pile hole 9, compacting and grouting to form filling grouting 3;
step four: welding transverse connecting steel bars 5 on supporting I-steel or channel steel piles 2, connecting the piles into a whole, jointly bearing the side pressure of the earth space collapse, and installing an earth-retaining bamboo springboard or an old template 4;
step five: and backfilling the space earthwork between the soil retaining bamboo springboard or the old template and the side slope soil body, compacting by using a digging machine, and compacting and grouting after close connection to ensure that the soil body is solidified and compacted to form a whole.
Preferably, according to the requirements of a side slope design drawing, a first step side slope line is placed, side slope earthwork is dug, a first step side slope is repaired, anchor rods are drilled, and cement slurry is injected. And hanging the net sheets, and spraying and anchoring concrete slurry to complete the first step section slope support 6.
Preferably, in the second step, a second step side slope line is placed, side slope earthwork is excavated, a second step side slope is repaired, anchor rods 10 are anchored, cement paste is injected, net sheets are hung, and concrete paste is sprayed and anchored, so that the second step section side slope support 7 is completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The construction method for supporting the side slope of the deep foundation pit of the high-rise building by the micro-expansion impervious soft soil body is characterized by comprising the following steps of:
the method comprises the following steps: according to the requirements of a side slope design drawing, a first step side slope line is placed, side slope earthwork is excavated, a first step side slope is repaired, anchor rods are arranged, cement paste is injected, net pieces are hung, and concrete paste is sprayed;
step two: placing a second step side slope line, digging side slope earthwork, repairing a second step side slope, bolting, injecting cement paste, hanging net pieces and spraying concrete paste;
step three: placing a third step slope line, excavating soil to repair a third step slope, utilizing a drilling machine to lead a hole to be 6.5m deep, installing an I-shaped steel or channel steel pile supporting pile, filling soil into the pile hole, compacting and grouting;
step four: welding transverse connecting steel bars on supporting I-shaped steel or channel steel piles, connecting the piles into a whole, commonly bearing the side pressure of the earthwork collapse, and installing a soil-retaining bamboo springboard or an old template;
step five: and backfilling the space earthwork between the soil retaining bamboo springboard or the old template and the side slope soil body, compacting by using a digging machine, and compacting and grouting after close connection to ensure that the soil body is solidified and compacted to form a whole.
2. The construction method for supporting and protecting the side slope of the deep foundation pit of the high-rise building according to claim 1, wherein the step of placing a first step side slope line, digging the earthwork of the side slope, repairing the first step side slope, bolting, grouting, net hanging and shotcreting concrete slurry to complete the side slope support of the first step section according to the requirements of a side slope design drawing.
3. The method according to claim 1, wherein the second step is a step of laying a slope line of the second step, digging earthwork of the slope, repairing the slope of the second step, bolting, injecting cement paste, hanging net pieces, spraying and anchoring concrete paste, and completing slope support of the second step section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085667.5A CN110761300B (en) | 2019-11-08 | 2019-11-08 | 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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| CN201911085667.5A CN110761300B (en) | 2019-11-08 | 2019-11-08 | 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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| CN110761300B true CN110761300B (en) | 2021-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111364472B (en) * | 2020-03-20 | 2021-10-15 | 中交第三航务工程局有限公司 | Construction process of dry dock wall |
| CN111663545A (en) * | 2020-06-24 | 2020-09-15 | 深圳市南华岩土工程有限公司 | Construction method for supporting impervious weak soil body with slope micro-expansion |
| CN114809031A (en) * | 2022-03-23 | 2022-07-29 | 中国水利水电第九工程局有限公司 | Construction method for plate-rib type anchor rod retaining wall support slope |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2848475B2 (en) * | 1992-04-21 | 1999-01-20 | 日特建設株式会社 | Earth retaining method |
| KR100715098B1 (en) * | 2005-12-23 | 2007-05-07 | 김선자 | Shoring structure |
| CN105926646A (en) * | 2016-05-10 | 2016-09-07 | 中铁第勘察设计院集团有限公司 | Reinforcing method for swelling rock cut slope |
| CN106592607A (en) * | 2017-03-13 | 2017-04-26 | 中国十七冶集团有限公司 | Steel bar embedding, net hanging and guniting supporting construction method of deep foundation pit |
| CN206457844U (en) * | 2017-02-10 | 2017-09-01 | 深圳市正兴基础建筑工程有限公司 | A kind of side slope foundation pit supporting construction |
| CN206956733U (en) * | 2017-04-01 | 2018-02-02 | 湖北华亚建设工程有限公司 | Slope Supporting of Deep Excavation structure |
| CN108643191A (en) * | 2018-04-18 | 2018-10-12 | 中国十七冶集团有限公司 | A kind of supporting construction and its construction method of ultra-deep piping lane foundation pit |
-
2019
- 2019-11-08 CN CN201911085667.5A patent/CN110761300B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2848475B2 (en) * | 1992-04-21 | 1999-01-20 | 日特建設株式会社 | Earth retaining method |
| KR100715098B1 (en) * | 2005-12-23 | 2007-05-07 | 김선자 | Shoring structure |
| CN105926646A (en) * | 2016-05-10 | 2016-09-07 | 中铁第勘察设计院集团有限公司 | Reinforcing method for swelling rock cut slope |
| CN206457844U (en) * | 2017-02-10 | 2017-09-01 | 深圳市正兴基础建筑工程有限公司 | A kind of side slope foundation pit supporting construction |
| CN106592607A (en) * | 2017-03-13 | 2017-04-26 | 中国十七冶集团有限公司 | Steel bar embedding, net hanging and guniting supporting construction method of deep foundation pit |
| CN206956733U (en) * | 2017-04-01 | 2018-02-02 | 湖北华亚建设工程有限公司 | Slope Supporting of Deep Excavation structure |
| CN108643191A (en) * | 2018-04-18 | 2018-10-12 | 中国十七冶集团有限公司 | A kind of supporting construction and its construction method of ultra-deep piping lane foundation pit |
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