CN111396121A - Excavation-free backfill construction method for underground old civil air defense works - Google Patents
Excavation-free backfill construction method for underground old civil air defense works Download PDFInfo
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- CN111396121A CN111396121A CN202010120071.0A CN202010120071A CN111396121A CN 111396121 A CN111396121 A CN 111396121A CN 202010120071 A CN202010120071 A CN 202010120071A CN 111396121 A CN111396121 A CN 111396121A
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- underground
- air defense
- civil air
- old
- excavation
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- 230000007123 defense Effects 0.000 title claims abstract description 53
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000002955 isolation Methods 0.000 claims abstract description 30
- 239000004567 concrete Substances 0.000 claims abstract description 20
- 238000009933 burial Methods 0.000 claims abstract description 4
- 239000011381 foam concrete Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/06—Filling-up mechanically
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses an excavation-free backfill construction method for underground old civil air defense works, which comprises the following steps: finding out the technical parameters of the position, the length, the width, the height and the burial depth of the old underground civil air defense works through underground exploration; lofting the position of the underground old civil air defense worker to the ground; vertically driving at least two rows of Larsen steel sheet piles into the backfill section at equal intervals for isolation to form one or more isolation sections in the old underground civil air defense works; a plurality of grouting holes which are arranged at equal intervals and communicated with the isolation sections are arranged on the ground corresponding to each isolation section; injecting concrete into the isolation section through each grouting hole at the same time until the concrete is filled up and compacted; and when the backfilled concrete reaches the preset strength, pulling out the Larsen steel sheet pile to finish the construction of the whole backfilling section. By adopting the invention, excavation is not needed, and the problems that collapse and traffic troubles are easily caused when underground old civil air defense works are backfilled and excavated and the stability of surrounding buildings is influenced can be effectively solved.
Description
Technical Field
The invention belongs to the field of backfill engineering of underground old civil air defence works, and particularly relates to an excavation-free backfill construction method of the underground old civil air defence works.
Background
From the beginning of the 20 th century, underground civil air defense works played an extremely important role in the civil air defense industry of China. However, nowadays, the aging of underground civil air defense works not only makes the civil air defense function lost, but also restricts the expansion, upgrading and reconstruction of cities. With the rapid promotion of urbanization in China and the requirement of city expansion and upgrading, the backfilling of old underground civil air defense works is not slow at all. Due to the complexity of underground rock soil, the aging strength of the underground old civil air defense works, busy ground traffic and dense surrounding buildings, the collapse problem is easily caused when the underground old civil air defense works are backfilled and excavated, the traffic trouble caused by the collapse problem is caused, and the stability of the surrounding buildings is influenced, so that great difficulty is caused to the backfilling construction of the underground old civil air defense works.
Disclosure of Invention
The invention aims to solve the problems that the excavation-free backfill construction method for the underground old civil air defence works does not need excavation, and can effectively solve the problems that collapse and traffic troubles are easily caused and the stability of surrounding buildings is influenced when the underground old civil air defence works are backfilled and excavated.
In order to solve the technical problem, the invention provides an excavation-free backfill construction method for underground old civil air defence works, which comprises the following steps:
s1, finding out technical parameters of position, length, width, height and burial depth of the old underground civil air defense works through underground exploration; wherein, no accumulated water exists inside the underground old civil air defense works;
s2, lofting the position of the old underground civil air defense worker to the ground;
s3, vertically driving at least two rows of Larsen steel sheet piles into the backfill section required by the old civil air defense works at equal intervals for isolation to form one or more isolation sections;
s4, a plurality of grouting holes which are arranged at equal intervals and communicated with the isolation sections are formed in the ground corresponding to each isolation section;
s5, simultaneously injecting concrete into the isolation section through each grouting hole until the concrete is filled up and compacted;
and S6, when the backfilled concrete reaches the preset strength, pulling out the Larsen steel sheet pile to finish the construction of the whole backfilling section.
In a preferred embodiment of the present invention, in step S1, the underground exploration is performed by a geological radar method.
In a preferred embodiment of the present invention, in step S2, the lofting is performed by using a total station lofting apparatus.
In a preferred embodiment of the present invention, in step S3, the larsen steel sheet pile has a model of SP-IV larsen steel sheet pile.
In a preferred embodiment of the present invention, in step S3, the top end of the larsen steel sheet pile extends out of the ground, and the distance between the top end of the larsen steel sheet pile and the ground is greater than or equal to 300 mm.
As a preferable embodiment of the present invention, in step S3, the bottom end of the larsen steel sheet pile is inserted into a foundation below the underground old civil air defense, and a distance between the bottom end of the larsen steel sheet pile and the bottom of the underground old civil air defense is greater than or equal to 500 mm.
In a preferred embodiment of the present invention, in step S3, a distance between two adjacent rows of larsen steel sheet piles is less than or equal to 15 m.
In a preferred embodiment of the present invention, in the step S4, the diameter of the injection hole is 300 mm.
In a preferred embodiment of the present invention, in step S4, the distance between two adjacent grouting holes is 3m to 5 m.
In a preferred embodiment of the present invention, in the step S5, the concrete is used in a dry density grade of 500kg/m3The foam concrete.
Compared with the prior art, the excavation-free backfill construction method for the underground old civil air defense works has the following beneficial effects that:
the construction method comprises the steps of vertically driving at least two rows of Larsen steel sheet piles into a backfilling section required by underground old civil air defence works for isolation to form one or more isolation sections, and backfilling each isolation section by adopting a concrete guniting injection mode; whole work progress need not to excavate, can backfill old man's air defense worker in underground fast, greatly shortens construction period, does not cause too big load to the environment moreover, is favorable to environmental protection to effectively solve old man's air defense worker in underground and backfill the problem that causes landslide, traffic puzzlement and influence its peripheral building stability easily when excavating.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic longitudinal section view of an excavation-free backfill construction method for underground old civil air defence works provided by the invention.
The labels in the figure are: 1. larsen steel sheet pile 2, grouting hole 3, ground 4, civil air defense engineering 5 and foundation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
In addition, in the description of the present invention, the terms "front" and "rear" refer to: when the underground old civil air defense construction method is in a use state, one surface close to a user is front, and the other surface far away from the user is back.
As shown in fig. 1, a preferable embodiment of the present invention is an excavation-free backfill construction method for old underground civil air defence works, which comprises the following steps:
s1, finding out technical parameters of the position, the length, the width, the height and the burial depth of the old underground civil air defense works 4 through underground exploration. In this embodiment, the underground old civil air defense works 4 are brick masonry structures, and no accumulated water exists in the underground old civil air defense works; the underground exploration adopts a geological radar method, and an instrument adopted by the geological radar method is an SIR-20 geological radar.
S2, lofting the position of the old underground civil air defense works 4 to the ground 3. In this embodiment, the lofting is performed by using a total station instrument.
S3, vertically driving at least two rows of Larsen steel sheet piles 1 into the backfilling sections of the underground old civil air defense works 4 at equal intervals for isolation to form one or more isolation sections. In the embodiment, the mechanical equipment for vertically driving the Larsen steel sheet pile 1 is a vibrating hydraulic pile driver, and the model is BY-VH 250; the Larsen steel sheet pile 1 is SP-IV Larsen steel sheet pile 1 in model number; the distance between two adjacent rows of Larsen steel sheet piles 1 is smaller than or equal to 15m, so that the later backfilling construction is facilitated; the top end of the Larsen steel plate pile 1 extends out of the ground 3, and the distance between the top end of the Larsen steel plate pile 1 and the ground is more than or equal to 300mm, so that pile pulling operation in the later period is facilitated; the bottom end of the Larsen steel plate pile 1 is inserted into a foundation 5 below the underground old civil air defense construction 4, the distance between the bottom end of the Larsen steel plate pile 1 and the bottom of the underground old civil air defense construction 4 is larger than or equal to 500mm, the sealing performance between each isolation area section is guaranteed, and meanwhile, the installation strength of the Larsen steel plate pile 1 is improved.
And S4, a plurality of grouting holes 2 which are arranged at equal intervals and communicated with the isolation sections are formed in the ground 3 corresponding to each isolation section. In this embodiment, the diameter of the grouting hole 2 is 300 mm; the distance between two adjacent grouting holes 2 is 3-5 m, so that concrete can be conveniently and uniformly injected into the isolation section.
And S5, simultaneously injecting concrete into the isolation section through each grouting hole 2 until the concrete is filled up and compacted. In the embodiment, each grouting hole 2 on one isolation section must be simultaneously injected with grouting until the concrete is filled up to be compact, and then the next isolation section is injected with grouting; the dry density grade of the concrete is 500kg/m3The foam concrete has the following technical parameters of the mixing ratio of each cube of the concrete: 105kg of fly ash, 312kg of common cement, 208.5kg of water and 1.16kg of foaming agent. It should be noted that the foam concrete has better fluidity, can be backfilled and compacted in a 360-degree blind angle-free manner, has enough strength, and is beneficial to the stability of the foundation.
And S6, when the backfilled concrete reaches the preset strength, pulling out the Larsen steel plate pile 1 to finish the construction of the whole backfilling section.
In conclusion, according to the excavation-free backfill construction method for the underground old civil air defense works, at least two rows of Larsen steel sheet piles 1 are vertically driven into the sections, needing to be backfilled, of the underground old civil air defense works 4 for isolation to form one or more isolation sections, and each isolation section is backfilled in a concrete guniting injection mode; whole work progress need not the excavation, can backfill old man's air defense worker 4 in underground fast, greatly shortens construction period, does not cause too big load to the environment moreover, is favorable to the environmental protection to effectively solve old man's air defense worker 4 in underground and backfill the excavation and cause landslide easily, traffic puzzlement and influence its peripheral building stability's problem.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. The excavation-free backfill construction method for the underground old civil air defense workers is characterized by comprising the following steps of:
s1, finding out technical parameters of position, length, width, height and burial depth of the old underground civil air defense works through underground exploration; wherein, no accumulated water exists inside the underground old civil air defense works;
s2, lofting the position of the old underground civil air defense worker to the ground;
s3, vertically driving at least two rows of Larsen steel sheet piles into the backfill section required by the old civil air defense works at equal intervals for isolation to form one or more isolation sections;
s4, a plurality of grouting holes which are arranged at equal intervals and communicated with the isolation sections are formed in the ground corresponding to each isolation section;
s5, simultaneously injecting concrete into the isolation section through each grouting hole until the concrete is filled up and compacted;
and S6, when the backfilled concrete reaches the preset strength, pulling out the Larsen steel sheet pile to finish the construction of the whole backfilling section.
2. The excavation-free backfill construction method for underground old civil air defense as claimed in claim 1, wherein in the step S1, the underground exploration adopts a geological radar method.
3. The excavation-free backfill construction method for the underground old civil air defense as claimed in claim 1, wherein in the step S2, the lofting is performed by using a total station instrument.
4. The excavation-free backfill construction method for the underground old civil air defense industry as claimed in claim 1, wherein in the step S3, the Larsen steel sheet pile is SP-IV Larsen steel sheet pile.
5. The excavation-free backfill construction method for the underground old civil air defense industry as claimed in claim 1, wherein in the step S3, the top end of the Larsen steel sheet pile extends out of the ground, and the distance between the top end of the Larsen steel sheet pile and the ground is greater than or equal to 300 mm.
6. The excavation-free backfill construction method for the old underground civil air defense as claimed in claim 1, wherein in the step S3, the bottom end of the larsen steel sheet pile is inserted into a foundation below the old underground civil air defense, and the distance between the bottom end of the larsen steel sheet pile and the bottom of the old underground civil air defense is greater than or equal to 500 mm.
7. The excavation-free backfill construction method for the underground old civil air defense industry as claimed in claim 1, wherein in the step S3, the distance between two adjacent rows of Larsen steel sheet piles is less than or equal to 15 m.
8. The excavation-free backfill construction method for the underground old civil air defense industry according to claim 1, wherein in the step S4, the diameter of the grouting hole is 300 mm.
9. The excavation-free backfill construction method for the underground old civil air defense industry as claimed in claim 1, wherein in the step S4, the distance between two adjacent grouting holes is 3 m-5 m.
10. The excavation-free backfill construction method for the underground old civil air defense works as claimed in claim 1, wherein in the step S5, the concrete is adopted with a dry density grade of 500kg/m3The foam concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010120071.0A CN111396121A (en) | 2020-02-26 | 2020-02-26 | Excavation-free backfill construction method for underground old civil air defense works |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010120071.0A CN111396121A (en) | 2020-02-26 | 2020-02-26 | Excavation-free backfill construction method for underground old civil air defense works |
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| CN111396121A true CN111396121A (en) | 2020-07-10 |
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| CN202010120071.0A Pending CN111396121A (en) | 2020-02-26 | 2020-02-26 | Excavation-free backfill construction method for underground old civil air defense works |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099943A (en) * | 2014-06-30 | 2014-10-15 | 中铁四局集团第四工程有限公司 | Underground diaphragm wall and deserted underground civil air defense engineering intersection processing method |
| CN104196034A (en) * | 2014-09-18 | 2014-12-10 | 中建交通建设集团有限公司 | Foundation pit construction method employing steel sheet piles as support cofferdam |
| CN105735354A (en) * | 2015-12-16 | 2016-07-06 | 贵州建工集团第建筑工程有限责任公司 | Covered-excavation full-top-down construction method of municipal underground engineering |
| CN106759473A (en) * | 2016-11-11 | 2017-05-31 | 中国建筑第八工程局有限公司 | The constructing structure and its construction method of underground pipe gallery and road |
| CN110374112A (en) * | 2019-07-26 | 2019-10-25 | 中国能源建设集团湖南省电力设计院有限公司 | Weak soil site system of deep foundation pit support and its construction method |
| CN110512594A (en) * | 2019-08-20 | 2019-11-29 | 北京建材地质工程有限公司 | The simple and easy method of churning driven opportunity cavity pore-forming |
-
2020
- 2020-02-26 CN CN202010120071.0A patent/CN111396121A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099943A (en) * | 2014-06-30 | 2014-10-15 | 中铁四局集团第四工程有限公司 | Underground diaphragm wall and deserted underground civil air defense engineering intersection processing method |
| CN104196034A (en) * | 2014-09-18 | 2014-12-10 | 中建交通建设集团有限公司 | Foundation pit construction method employing steel sheet piles as support cofferdam |
| CN105735354A (en) * | 2015-12-16 | 2016-07-06 | 贵州建工集团第建筑工程有限责任公司 | Covered-excavation full-top-down construction method of municipal underground engineering |
| CN106759473A (en) * | 2016-11-11 | 2017-05-31 | 中国建筑第八工程局有限公司 | The constructing structure and its construction method of underground pipe gallery and road |
| CN110374112A (en) * | 2019-07-26 | 2019-10-25 | 中国能源建设集团湖南省电力设计院有限公司 | Weak soil site system of deep foundation pit support and its construction method |
| CN110512594A (en) * | 2019-08-20 | 2019-11-29 | 北京建材地质工程有限公司 | The simple and easy method of churning driven opportunity cavity pore-forming |
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Application publication date: 20200710 |