CN109610502A - A kind of construction method of dark formula Modified soil long and short anchor arm - Google Patents
A kind of construction method of dark formula Modified soil long and short anchor arm Download PDFInfo
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- CN109610502A CN109610502A CN201811514723.8A CN201811514723A CN109610502A CN 109610502 A CN109610502 A CN 109610502A CN 201811514723 A CN201811514723 A CN 201811514723A CN 109610502 A CN109610502 A CN 109610502A
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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
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
A kind of construction method of dark formula Modified soil long and short anchor arm is using excavation section by section mode (L1) and Sub-region and hierarchical (h1, h2) digging mode combines, main digging mode (7) and auxiliary are excavated (6) mode and are combined, Site compacting rapid construction is constructed with the construction method that in due course gib combines, with congenic method ratio, it is fast with speed of application, slurry trench stability, construction quality is easily controllable, the advantages such as project cost is low, particularly suitable for argillaceous sandstone, high liquid limit residual soil mid-deep strata the landslide control more than interface culm residual soil cut slope Tu Yan.
Description
Technical field
The present invention relates to a kind of dark formula Modified soil long and short anchor arms, especially relate to a kind of dark formula Modified soil antiskid gear
The construction method of cob wall.
Background technique
In recent years, highway and hydraulic engineering scientific worker are beginning one's study soil improvement technology applied to expansion
The punishment of native side slope of embankment achieves original project benefit and technological achievement.But due to lacking suitable construction technical method,
Soil improvement technology can not be also directly used for the improvement on mid-deep strata swelled ground soil-slope landslide at present, both at home and abroad to such cunning
The improvement on slope, still mainly using less economical anchor cable and friction pile composite construction scheme, therefore, engineering practice urgent need is found
A kind of technically reliable and the better administering method of economy.
Expansive soil slope comes down based on shallow failure, but the thick-layer on argillaceous sandstone, culm cut slope top
Residual soil landslide then Chang Weizhong, deep-level landslide.Argillaceous sandstone, culmiferous residual soil are often with weak expansile high liquid limit
Soil, therefore, such landslide belongs in swelled ground, deep-level landslide.The main inducing that such landslide is destroyed is made due to excavating off-load
The desiccation crack that the contraction of the high liquid limit soil soil body is formed under the conditions of the relief joint that slope surface excavation face is formed and dry dehydration
Convenience is opened for rain infiltration, and rain infiltration enters the interface Tu Yan, so that the high liquid limit soil soil above the interface Tu Yan
Body water content increases, and soil body humidifying is caused to expand, and shearing strength sharply declines, until close to the intensity of weak soil, finally, low-intensity
It induces high liquid limit residual soil and the destruction of mid-deep strata landslide occurs along the interface Tu Yan.Often length is larger on this kind of landslide, such as uses earth-retaining
Wall is administered, and Retaining Walls are generally required, this must just build dark formula retaining wall in the middle part of slip mass.
Currently, modified cement soil is usually used in the chemical modifying to high liquid limit soil filler, the cement after chemistry of cement is improved
Modified soil not only eliminates the undesirable deformation characteristic of high liquid limit soil drying shrinkage bulking, and the modified cement soil of higher cement mixing content also has
There is quick-hardening, forms the superperformance for being much higher than humidifying original state high liquid limit soil body shearing strength.Cement is changed if can find
Property the suitable construction method built to dark formula retaining wall of soil technical application, can have by big width modified cement soil retaining wall
Larger self weight, form multigrade cement Modified soil gravity retaining wall, realize the improvement come down to such high liquid limit soil mid-deep strata
Background technique describes paragraph.
Summary of the invention
It is the mud on the landslide destroyed that Modified soil, which is difficult to use in and administers the main problem of mid-deep strata land slide of swelled ground,
When carrying out dark formula Modified soil long and short anchor arm excavation construction on matter sandstone, culm residual soil cut slope, it is difficult to guarantee side
Secondary sliding does not occur and is difficult to keep the stabilization for excavating cell wall for slope.
In argillaceous sandstone, culm residual soil cut slope, deep-level landslide often led along what the interface Tu Yan occurred
Draw formula, gradual landslide, slip mass is often made of large-scale whole sliding block and fissure zone, and sliding surface is more gentle, and mostly compacted
Dynamic landslide, thus, when large-scale whole slide body progress segment face is excavated, still there is slip mass short-term interim soil arching effect to mention
Supply the stabilization of crater wall in short-term.Technical thought of the invention is the interim soil arch effect that medium-and-large-sized slide body has that come down based on such
It answers, using reasonable excavation method, using exploratory trench formula light section Rapid Excavation and the modified earth process of quickly stuffing, and cooperates and changing
Property soil in add early strength agent so that backfill Modified soil physical efficiency provides branch before the interim soil arching effect failure of exploratory trench formula light section in time
Shield effect, to realize the stabilization excavation construction of dark formula retaining wall.Specifically, the present invention is mainly achieved by the following measures
The stabilization of dark formula long and short anchor arm, low cost construction:
(1), the present invention using solid weight mixed ratio be respectively 10% cement, 3% waterglass and 87% excavation landslide it is high
Liquid limit soil earth material is modified mixing for soil and matches, then will mix the modification earth material prepared plus suitable quantity of water, is mixed and stirred simultaneously with excavator scene
It is backfilling and compacted in box cut, to form the modified cement cob wall body with quick-hardening feature.It is main due to the wall
Material is the high liquid limit soil residual soil landslide earth material excavated, and earth material cost is very low, in addition, is mixed and stirred with excavator scene and backfills pressure
Real, the construction cost for mixing and stirring and being backfilling and compacted also is greatly lowered, this has construction method provided by the invention than congenic method
There is quick and economic advantage；
(2), the present invention is encircleed using segmentation, subregion and stage excavation mode so as to excavate the interim soil provided by light section
Effect realizes that cell wall keeps of short duration stable purpose when excavating.On the one hand, the present invention in the plane (1-a) by Modified soil antiskid
The design length (L) of retaining wall is divided into several construction sections with 5m width (L1), single construction section include main excavation area (7) and
The part of excavation area (6) two is assisted, and keeps the design width (b) of main excavation area (7) length and Modified soil long and short anchor arm
Unanimously, and guarantee after completing a construction section construction, should at least separate a construction section and carry out applying for next construction section again
Work, thus the stabilization for the slopes that come down during ensure that integral construction；On the other hand, the present invention on section (1-b) by Modified soil
The half depth of long and short anchor arm projected depth (h) presses upper layer (h1) and lower layer (h2) as single layer cutting depth, by construction section
It is divided into top regions and area, lower layer, in order to which excavator excavates operation.The present invention is just opened by excavation section by section and subregion, layering in this way
The combination of digging realizes the control of single excavated section in the light section range of 5m × 5m, and can provide interim soil by light section
Arching is come the of short duration stabilization of cell wall during guaranteeing excavation；
(3), the present invention is combined using main digging mode and auxiliary digging mode, and Lai Shixian quick supporting and deep layer are quickly opened
The stable purpose of crater wall during digging, guaranteeing entire excavate.The present invention is using dark formula Modified soil long and short anchor arm scope of design as master
Excavation area (7), main excavation area (7) include two layers of main excavation top regions (1) and area, main excavation lower layer (5), and in the main excavation
Upward slope orientation and descending orientation the setting auxiliary excavation area (6) of top regions (1), auxiliary excavation area (6) includes the auxiliary of upward slope orientation
It helps and excavates top regions (2), the auxiliary that the auxiliary of descending orientation side-lower is excavated immediately below top regions (3) and descending orientation is excavated
Floor area (4) totally three parts.When excavation, auxiliary is excavated first and excavates top regions (2), and by shifting to an earlier date spice, fast compacting time
The measures such as modified cement soil are filled out, using the characteristic of modified cement soil quick-hardening, reaches and gets the jump on the landslide interim soil arching effect of the soil body
It is formed to the main temporary support structures for excavating top regions (1) in auxiliary excavation top regions (2) range before failure and ensures main excavation
The purpose of top regions (1) excavation slurry trench stability；Auxiliary by excavating descending orientation excavates top regions (3) to carry out to excavator
Area, main excavation lower layer (5), which is excavated, provides operation path up and down, and excavates top regions (4) by excavating descending orientation auxiliary come to digging
Pick machine carries out the main excavation for excavating area, lower layer (5) and provides operation seat in the plane.
In short, a kind of construction method of dark formula Modified soil long and short anchor arm provided by the invention makes Modified soil antiskid earth-retaining
The improvement that wall can be used for argillaceous sandstone, culm residual soil cut slope comes down along the mid-deep strata at the interface Tu Yan, is applied with similar
Work method ratio has the advantages such as speed of application is fast, crater wall supporting is stable, construction quality is easily controllable, project cost is low.
Detailed description of the invention
Fig. 1 is a kind of dark formula Modified soil long and short anchor arm construction method schematic diagram, and (1-a) is wall construction in Fig. 1
Section divides plan view, (1-b) is single construction section plan view, (1-c) is the A-A ' cross-section diagram of single construction section, (1-d) is single
B-B ' the cross-section diagram of a construction section.
Fig. 2 is that one kind provided by the invention is used on the expansive soil slope slip mass of Baise of Guangxi road event portion guard station
The construction method of dark formula Modified soil long and short anchor arm carries out the engineering after dark formula Modified soil long and short anchor arm construction is completed 1 year and answers
Use instance graph.
Specific embodiment
A kind of wall of dark formula Modified soil long and short anchor arm proposed by the present invention is made of Modified soil；The Modified soil is consolidated
Body weight mixed ratio be respectively 10% cement, 3% waterglass and 87% excavation landslide high liquid limit soil earth material；The present invention is by opening
A kind of dark formula Modified soil long and short anchor arm is divided into several construction section 1-a by excavation construction process；Single construction section 1-b includes that master opens
Dig area 7 and the auxiliary part of excavation area 6 two；Main excavation area 7 includes positioned at the main excavation top regions 1 of upper layer h1 and positioned at lower layer h2
Area, main excavation lower layer 5, be distributed in Modified soil long and short anchor arm scope of design 1-c；Auxiliary excavation area 6 includes being located at upper layer h1
The auxiliary in upward slope orientation excavates top regions 2, the auxiliary of descending orientation side-lower excavate it is auxiliary immediately below top regions 3 and descending orientation
It helps and excavates top regions 4, be increased boundary of works area 1-b, 1-c, 1-d for auxiliary construction.With reference to the accompanying drawing 1 and in Guangxi hundred
Specific construction example figure 2 in color excavated expansive soil slope landslide reinforcement, the invention will be further described.
A kind of wall of dark formula Modified soil long and short anchor arm proposed by the present invention is made of Modified soil；The Modified soil is consolidated
Body weight mixed ratio be respectively 10% cement, 3% waterglass and 87% excavation landslide high liquid limit soil earth material；The dark formula
The construction method of Modified soil long and short anchor arm, steps characteristic are:
(1), a construction section is chosen, with length L1 is 5m and width b1 is the planar dimension 1-a of 3m, and is the depth of 5m with depth
Degree size excavates the main auxiliary for excavating 1 upward slope orientation of top regions and excavates top regions 2, while the high liquid limit soil earth material dug out being sprinkled water
To soft plastic state, by the solid weight mixed ratio of cement 10%, waterglass 3% and high liquid limit soil 87%, scene is mixed and stirred with excavator
Uniformly, the modified cement soil earth material mixed of being subject to is in hard plastic state 1-a；
(2), top regions 2 being excavated to earth's surface with the Modified soil earth material back-filling in layers auxiliary mixed and stirred, single layer virtual resurfacing thickness is 70cm,
Width b1 is 3m, is compacted using excavator machine bucket, compacting counting is no less than 6 times, and thickness should ensure that no more than 50cm.Layering
After being backfilling and compacted completion 1 day, the modified soil body can be hardened, thus formed to the main temporary support structures 1-a for excavating top regions 1,
1-d；
(3), main excavation top regions 1 are excavated with the excavation size of length b width L1 and depth h2；
(4), with length L1 be 5m and width b1 is the planar dimension 1-a of 3m, and is that 0m and right end terminate to play left end beginning depth
The size that depth is 5m excavates auxiliary and excavates top regions 3, and with length L1 be 5m and width b1 for 3m planar dimension 1-a, with
The size that depth is 5m excavates auxiliary and excavates top regions 41-d；
(5), excavator is excavated into top regions 3 from the auxiliary dug and reaches the bottom that auxiliary excavates top regions 4；
(6), main excavation area, lower layer 5 is excavated with length b width L1 and depth h1 and is layered with the Modified soil earth material mixed and stirred
Backfill, single layer void paving and compacting requirement are identical as step (2)；
(7), main excavation top regions 1 are backfilled referring to step (5)；
(8), top regions 3 excavated referring to step (5) backfill auxiliary, assist excavating top regions 4, the whole for completing first construction section is applied
Work；
(9), next construction section is chosen by the principle for being separated by a construction section width L1, and referring to step (2) to step (7),
Carry out the construction of next construction section；
(10), referring to step (8), the construction of all construction sections is completed.
Baise of Guangxi road event portion guard station is being administered using the application of construction technology for originally declaring patent in July, 2017
The construction drawing 2 for the Modified soil long and short anchor arm that Weathered Mudstone comes down with side slope mid-deep strata, the more torrential rains of Jing Yinian are examined
It tests and shows originally to declare that patented technology is fast with speed of application, crater wall supporting is stable, construction quality is easily controllable, project cost is low
Etc. advantages.
Claims (2)
1. a kind of wall of dark formula Modified soil long and short anchor arm proposed by the present invention is made of Modified soil；The solid of the Modified soil
Weight mixed ratio be respectively 10% cement, 3% waterglass and 87% excavation landslide high liquid limit soil earth material；The present invention is by opening
A kind of dark formula Modified soil long and short anchor arm is divided into several construction sections (1-a) by excavation construction process；Individually construction section (1-b) includes
Main excavation area (7) and auxiliary two parts excavation area (6) (1-a)；Main excavation area (7) includes on the main excavation of upper layer (h1)
Floor area (1) and the area, main excavation lower layer (5) for being located at lower layer (h2), are distributed in Modified soil long and short anchor arm scope of design (1-c)；It is auxiliary
Helping excavation area (6) includes the auxiliary that top regions (2), descending orientation side-lower are excavated positioned at the auxiliary in the upward slope orientation of upper layer (h1)
It excavates the auxiliary immediately below top regions (3) and descending orientation and excavates top regions (4), be increased boundary of works area for auxiliary construction
(1-b)、(1-c)、(1-d)。
2. a kind of construction method of dark formula Modified soil long and short anchor arm as described in claim 1, steps characteristic is:
1) one construction section of selection, the planar dimension (1-a) that with length (L1) be 5m and width (b1) is 3m, and with 5m depth
Size excavates the main auxiliary for excavating top regions (1) upward slope orientation and excavates top regions (2), while the high liquid limit soil earth material dug out being spilt
Water is live to excavate by the solid weight mixed ratio of cement 10%, waterglass 3% and high liquid limit soil 87% to soft plastic state
Machine uniform mixing, the modified cement soil earth material mixed of being subject to are in hard plastic state (1-a)；
2) top regions (2) being excavated to earth's surface with the Modified soil earth material back-filling in layers auxiliary mixed and stirred, single layer virtual resurfacing thickness is 70cm,
Width (b1) is 3m, is compacted using excavator machine bucket, compacting counting is no less than 6 times, and thickness should ensure that no more than 50cm.Point
After layer is backfilling and compacted completion 1 day, the modified soil body can be hardened, to be formed to the main temporary support structures for excavating top regions (1)
(1-a,1-d)；
3) main excavation top regions (1) are excavated with the excavation size of length (b), width (L1) and depth (h2)；
It 4) is 5m with length (L1) and planar dimension (1-a) that width (b1) is 3m, and with left end initial depth for 0m and right end
Terminate the size that depth is 5m and excavate auxiliary to excavate top regions (3), and is 5m with length (L1) and plane that width (b1) is 3m
Size (1-a) excavates auxiliary excavation top regions (4) (1-d) with the size of 5m depth；
5) excavator is excavated into top regions (3) from the auxiliary dug and reaches the bottom that auxiliary excavates top regions (4)；
6) with length (b), width (L1) and depth (h1) excavate main excavation area, lower layer (5) and with the Modified soil earth material mixed and stirred into
Row back-filling in layers, single layer void paving and compacting requirement are identical as step 2)；
7) main excavation top regions (1) are backfilled referring to step 5)；
8) top regions (3) excavated referring to step 5) backfill auxiliary, assist excavating top regions (4), complete the whole of first construction section
Construction；
9) next construction section is chosen by the principle for being separated by a construction section width (L1), and referring to step 2) to step 7), into
The construction of the next construction section of row；
10) referring to step 8), the construction of all construction sections is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811514723.8A CN109610502B (en) | 2018-12-11 | 2018-12-11 | Construction method of concealed modified soil anti-slip retaining wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811514723.8A CN109610502B (en) | 2018-12-11 | 2018-12-11 | Construction method of concealed modified soil anti-slip retaining wall |
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| CN109610502A true CN109610502A (en) | 2019-04-12 |
| CN109610502B CN109610502B (en) | 2020-12-01 |
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Citations (5)
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|---|---|---|---|---|
| JPH08209679A (en) * | 1995-02-03 | 1996-08-13 | Seibu Kensetsu Kk | Inside slope structure of waste disposal place |
| CN103088834A (en) * | 2013-02-01 | 2013-05-08 | 河海大学 | Method for improving slope stability of expansive soil and controlling structural damage of expansive soil |
| CN103572765A (en) * | 2013-11-19 | 2014-02-12 | 成军 | Treatment and construction method of bridge site river bank expansive soil landslide positions |
| CN104674842A (en) * | 2015-02-13 | 2015-06-03 | 福建省建专岩土工程有限公司 | Solidified soil retaining wall and construction method thereof |
| CN106351239A (en) * | 2016-10-28 | 2017-01-25 | 长沙理工大学 | Cement modified soil strengthened geogrid reinforced soil structure and construction method thereof |
-
2018
- 2018-12-11 CN CN201811514723.8A patent/CN109610502B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08209679A (en) * | 1995-02-03 | 1996-08-13 | Seibu Kensetsu Kk | Inside slope structure of waste disposal place |
| CN103088834A (en) * | 2013-02-01 | 2013-05-08 | 河海大学 | Method for improving slope stability of expansive soil and controlling structural damage of expansive soil |
| CN103572765A (en) * | 2013-11-19 | 2014-02-12 | 成军 | Treatment and construction method of bridge site river bank expansive soil landslide positions |
| CN104674842A (en) * | 2015-02-13 | 2015-06-03 | 福建省建专岩土工程有限公司 | Solidified soil retaining wall and construction method thereof |
| CN106351239A (en) * | 2016-10-28 | 2017-01-25 | 长沙理工大学 | Cement modified soil strengthened geogrid reinforced soil structure and construction method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 孟国忠: "《山区油气管道地质灾害防治研究》", 30 April 2008, 中国大地出版社 * |
| 陈维: "南水北调中线工程水泥改性土换填施工工艺浅析", 《四川水力发电》 * |
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