CN104213566B - Double rows slip casting stake with draw shotcrete layer combined supporting structure - Google Patents
Double rows slip casting stake with draw shotcrete layer combined supporting structure Download PDFInfo
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- CN104213566B CN104213566B CN201410504680.0A CN201410504680A CN104213566B CN 104213566 B CN104213566 B CN 104213566B CN 201410504680 A CN201410504680 A CN 201410504680A CN 104213566 B CN104213566 B CN 104213566B
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Abstract
The invention discloses a kind of double rows slip casting stake and draw shotcrete layer combined supporting structure, it is characterized in that arranging the double rows slip casting stake being formed by front campshed and rear campshed, front campshed and rear campshed are respectively to be arranged by put more energy into gravel slip-casting stake and element stake equi-spaced apart, and front campshed and rear campshed are linked by top collar tie beam jointly; Form and draw shotcrete layer on excavation supporting surface; Put more energy into gravel slip-casting stake stake core for the shaped steel unit of putting more energy into, pile body be by metaling and cement mortar through high pressure mixing moulding, element stake is plain concrete pile. The present invention is directed to that the excavation of foundation pit degree of depth is large, slope stability is poor, support system is subject to excavated surface and the construction occasion of the restriction of objective condition around, meeting under the prerequisite of security, strength and stability requirement, can reduce difficulty of construction, improve efficiency of construction, and reduce construction cost.
Description
Technical field
The present invention relates to the one gravel slip-casting stake spray anchor structure combined supporting structure of putting more energy into, more specifically say the supporting construction being applied under the occasion such as deep basal pit, side slope.
Background technology
Along with the development of urban construction, architectural engineering, municipal works and each large-scale construction project are constantly rapidly expanded, deep foundation pit support problem is emerged in large numbers gradually, although the support system in prior art is various informative, but large for the excavation of foundation pit degree of depth, slope stability is poor, support system is subject to excavated surface and the restriction of close to buildings and structures objective condition around, meeting security, meet under the prerequisite of strength and stability, its difficulty of construction, construction cost, efficiency of construction and with the harmony of environment be all need in conjunction with the problem considering, and the target that its resultant effect is constantly asked in engineering just.
Summary of the invention
The invention provides a kind of double rows slip casting stake and draw shotcrete layer combined supporting structure, to large for the excavation of foundation pit degree of depth, slope stability is poor, the construction occasion that support system is subject to excavated surface and is close to the restriction of buildings or structures objective condition around, meeting security, meeting under the prerequisite of strength and stability, reach and reduce its difficulty of construction, reduction construction cost, and improve the goal of the invention of efficiency of construction.
The present invention is that technical solution problem adopts following technical scheme:
Double rows slip casting stake of the present invention with draw the feature of shotcrete layer combined supporting structure to be: the double rows slip casting stake that is made up of front campshed and rear campshed is set, described front campshed and rear campshed are respectively to be arranged by put more energy into gravel slip-casting stake and element stake equi-spaced apart, and described front campshed and rear campshed are linked by top collar tie beam jointly; Form and draw shotcrete layer on excavation supporting surface; After front row in described front campshed is put more energy in gravel slip-casting stake and rear campshed, row's gravel slip-casting stake of putting more energy into is on left right-alternative position; Described put more energy into gravel slip-casting stake stake core for the shaped steel unit of putting more energy into, pile body be by metaling and cement mortar through high pressure mixing moulding, described element stake is plain concrete pile.
Double rows slip casting stake of the present invention with draw the feature of shotcrete layer combined supporting structure to be also:
The described shaped steel unit of putting more energy into is relatively uprightly to form biside plate by two channel-section steels, between two channel-section steels, forms rectangle frame with reinforcing bar welding; In the periphery of the described shaped steel unit of putting more energy into, be welded with annular guide collar, to be located in the stake hole of the gravel slip-casting stake of putting more energy into the described annular guide collar shaped steel unit that makes to put more energy into, described annular guide collar is in vertical at least spaced twice.
Described stake footpath of putting more energy into gravel slip-casting stake and element stake is 400mm, in front campshed, being in the centre-to-centre spacing of putting more energy between gravel slip-casting stake and front-seat element stake at the front row on adjacent position is 500mm, in rear campshed, being in the centre-to-centre spacing that rear row on adjacent position puts more energy between gravel slip-casting stake and the stake of rear row element is 1000mm, front campshed and the rear campshed 1800mm of being separated by.
The degree of depth of described front campshed at least reaches the following 6900mm in foundation ditch bottom surface, and the degree of depth of described rear campshed at least reaches the following 6700mm in foundation ditch bottom surface.
Double rows slip casting stake of the present invention with draw the feature of shotcrete layer combined supporting structure to be also:
The described gravel slip-casting stake metaling of putting more energy into adopts the hard filler of size fractions of raw coal batching, and described hard filler is gravelly sand, dust, circle gravel, rubble or cobble, and the diameter of described hard filler is 20-25mm; Clay content in described metaling is no more than 5%, and described 5% refers to mass percent;
The described gravel slip-casting stake cement mortar of putting more energy into adopts 425# portland cement, and the ratio of mud is by weight percentage 1: 1-0.5: 1, and in described cement mortar, add by weight percentage and have 0.3% triethanolamine as early strength agent;
The volume ratio of described metaling and cement mortar is 1: 0.8.
Double rows slip casting stake of the present invention with draw the feature of shotcrete layer combined supporting structure to be also: described in draw shotcrete layer, it sprays the coagulate layer thickness forming is 80mm, strength grade of concrete is C25, adopt natural grading and diameter to be not more than the limestone gravel of 20mm, the rubble content that the diameter in limestone gravel is 10-15mm accounts for the 60%-70% of limestone gravel gross mass.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the double gravel slip-casting stake and draw the combined supporting of shotcrete layer of putting more energy into of the present invention, can effectively raise the efficiency, reduction of erection time, cost-saving, protection of the environment, and in like manner, less on the impact of Nearby Structure, structures, stability is better.
2, before the present invention, campshed is combined setting with rear campshed, and link and form door frame support system with top collar tie beam between stake top, make its front campshed first bear a part of side force, rear campshed is alleviated a part of side force, make it can in the time that the soil body deforms, do appropriate distortion and allow pressure, jointly form liner structure with drawing shotcrete layer, both realized with rigid protection structure and born powerful soil pressure, there is again flexible support and allow the soil body to occur being necessarily out of shape and limit soil body excessive deformation to occur sliding, obtain firm supporting effect.
3, supporting construction of the present invention can be used for various complex topographical and geological condition conditions, and special in narrow field construction, it is less that its support pattern is affected by Nearby Structure, structures.
Brief description of the drawings
Fig. 1 is supporting construction sectional schematic diagram in the present invention;
Fig. 2 is in the present invention, put more energy into broken stone pile and element stake plan-position schematic diagram;
Fig. 3 is the gravel slip-casting stake sectional schematic diagram of putting more energy in the present invention;
Fig. 4 is the gravel slip-casting stake elevational schematic view of putting more energy in the present invention;
Number in the figure: 1 front campshed, the 1a gravel slip-casting stake of putting more energy at front row, the front-seat element stake of 1b, 2 rear campsheds, arrange the gravel slip-casting stake of putting more energy into after 2a, row's element stake after 2b, 3 top collar tie beams, 4 draw shotcrete layer, 5a channel-section steel, 5b reinforcing bar, 5c annular guide collar, 6 holes, 7 Grouting Pipe, 8 anchor poles, 9 linked network joint bars, 10 hang steel fabric sheet, 11 gutters.
Detailed description of the invention
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, in the present embodiment double rows slip casting stake with draw shotcrete layer combined supporting structure to be:
The double rows slip casting stake being made up of front campshed 1 and rear campshed 2 is set, and front campshed 1 and rear campshed 2 are respectively to be arranged by put more energy into gravel slip-casting stake and element stake equi-spaced apart, and front campshed 1 and rear campshed 2 are linked by top collar tie beam 3 jointly; Form and draw shotcrete layer 4 on excavation supporting surface; The rear row who puts more energy in gravel slip-casting stake 1a and rear campshed in front row in the front campshed gravel slip-casting stake 2a that puts more energy into is on left right-alternative position.
Put more energy into gravel slip-casting stake stake core for the shaped steel unit of putting more energy into, pile body be by metaling and cement mortar through high pressure mixing moulding, front-seat element stake 1b and a rear row element 2b are plain concrete pile.
As shown in Figure 3 and Figure 4, the shaped steel unit of putting more energy in the present embodiment is relatively uprightly to form biside plate by two channel-section steel 5a, between two channel-section steel 5a, forms rectangle frame with reinforcing bar 5b welding; In the periphery of shaped steel unit of putting more energy into, be welded with annular guide collar 5c, located in the stake hole 6 of the gravel slip-casting stake of putting more energy into the annular guide collar 5c shaped steel unit that makes to put more energy into, annular guide collar 5c is vertically having spaced twice at least.
The gravel slip-casting stake of putting more energy into is 400mm with a footpath for element stake, in front campshed, being in the centre-to-centre spacing of putting more energy between gravel slip-casting stake 1a and front-seat element stake 1b at the front row on adjacent position is 500mm, in rear campshed, being in the centre-to-centre spacing that rear row on adjacent position puts more energy between gravel slip-casting stake 2a and rear row element stake 2b is 1000mm, front campshed 1 and rear campshed 2 1800mm of being separated by; The degree of depth of front campshed 1 at least reaches the following 6900mm in foundation ditch bottom surface, and the degree of depth of rear campshed 2 at least reaches the following 6700mm in foundation ditch bottom surface.
The gravel slip-casting stake metaling of putting more energy into adopts the hard filler of size fractions of raw coal batching, and hard filler is gravelly sand, dust, circle gravel, rubble or cobble, and the diameter of hard filler is 20-25mm; Clay content in metaling is no more than 5%, and it 5% refers to mass percent; The gravel slip-casting stake cement mortar of putting more energy into adopts 425# portland cement, and the ratio of mud is by weight percentage 1: 1-0.5: 1, and in cement mortar, add by weight percentage and have 0.3% triethanolamine as early strength agent; The volume ratio of metaling and cement mortar is 1: 0.8.
Drawing the coagulate layer thickness forming by injection in shotcrete layer is 80mm, strength grade of concrete is C25, adopt natural grading and diameter to be not more than the limestone gravel of 20mm, the rubble content that the diameter in limestone gravel is 10-15mm accounts for the 60%-70% of limestone gravel gross mass.
In the present embodiment double rows slip casting stake with draw shotcrete layer combined supporting to construct as follows:
Step 1: excavate and adopt soil nailing and anchor pole layer and section to carry out supporting according to design altitude shallow-layer layer and section, form the scope of operation, carry out position of p ile machine in the scope of operation, by the desired location pore-forming of double rows slip casting stake;
Step 2: to the gravel slip-casting stake of putting more energy into stake the interior lifting in hole 6 put more energy into shaped steel unit, place Grouting Pipe 7, in stake hole 6, drop into metaling again, subsequently, cement mortar is carried out to high-pressure slip-casting by Grouting Pipe 7 in stake hole 6, form by high pressure mixing the gravel slip-casting stake of putting more energy into; To the construction that completes plain concrete pile in element stake stake hole;
High-pressure slip-casting completes for twice, and first grouting pressure is 0.4～0.6MPa, and secondary grouting pressure is 1～2.5MPa.
Step 3: in the time that the pile body concrete strength of front campshed 1 and rear campshed 2 reaches 75%, qualified construction top collar tie beam 3 after testing;
Step 4: the excavation pit earthwork, set anchor pole 8 on excavation supporting surface, set linked network joint bar 9 at slope end face, hang steel fabric sheet 10, gunite concrete and form and draw shotcrete layer 4, complete supporting. In the time drawing shotcrete layer, expulsion pressure is 0.15～0.2MPa, shower nozzle be subject to the distance of spray plane to remain on 1.0～1.5m, shower nozzle keeps as far as possible and is subject to spray plane vertical, angle of inclination is not less than 75 °; While drawing shotcrete layer, shower nozzle is made continuously helical form circular motion, and a rear circle is pressed last circle 1/3rd areas.
Concrete operations in work progress also will be considered following situation:
Utilizing stake machine lifting will put more energy into shaped steel unit while hanging in a hole, on every shaped steel, can be welded with 3～4 road annular guide collar in interval, adjust direction placed in the middle with the shaped steel unit that ensures to put more energy into.
In construction, adopt CCLL-D series Grouting Pipe, repeatedly slip casting, slip casting is not subject to time restriction, and in the time burying Grouting Pipe underground, bottom stopper shutoff, prevents that the mouth of pipe is blocked by the soil body in put procedure.
Metaling can not be selected the building stones of weathering or half weathering, avoids shaking that it is broken to rack, and affects intensity and the water penetration of pile body, and the grating of metaling does not have strict requirement, selects size fractions of raw coal batching, should not use single-stage to join building stones.
In the time of the collar tie beam of construction top. First adopt mechanical digging groove high to stake top mark, abolish a top laitance simultaneously, build 120mm brick loose tool by laying bricks or stones, the good top of colligation ring beam reinforcing steel bar on request, top collar tie beam concrete answers primary concreting to complete.
After top collar tie beam has been constructed, the excavation section by section earthwork is to design altitude, and construction in time forms and draw shotcrete layer, before construction of shotcrete, and must cleaning and rinse foundation ditch side. Spraying circuit is generally that the branch of segmentation from top to bottom carries out.
Require the top preloading of foundation ditch slope must not exceed 10kPa, within the scope of the 6m of top, slope, must not have a large amount of ponding, toe is forbidden to be flooded for a long time, keep gutter 11 unobstructed.
Claims (5)
- Double rows slip casting stake with draw a shotcrete layer combined supporting structure, it is characterized in that: arrange by front campshed (1) and rear campshed (2)The double rows slip casting stake forming, described front campshed (1) is to be arranged by put more energy into gravel slip-casting stake and element stake equi-spaced apart, described rear campshed (2)Also be to be arranged by put more energy into gravel slip-casting stake and element stake equi-spaced apart, described front campshed (1) and rear campshed (2) are jointly by top collar tie beam (3)Link; Form and draw shotcrete layer (4) on excavation supporting surface; Front row in described front campshed (1) put more energy into gravel slip-casting stake (1a) with afterAfter in campshed, arranging the gravel slip-casting stake (2a) of putting more energy into is on left right-alternative position; The described gravel slip-casting stake stake core of putting more energy into is the type of putting more energy intoSteel unit, pile body be by metaling and cement mortar through high pressure mixing moulding, described element stake is plain concrete pile; The described shaped steel of putting more energy intoUnit is relatively uprightly to form biside plate by two channel-section steels (5a), between two channel-section steels (5a), forms square with reinforcing bar (5b) weldingShape frame; In the periphery of the described shaped steel unit of putting more energy into, be welded with annular guide collar (5c), make with described annular guide collar (5c)The shaped steel unit of putting more energy into is located in stake hole (6) of the gravel slip-casting stake of putting more energy into, and described annular guide collar (5c) is vertically having at leastThe twice at interval.
- Double rows slip casting stake according to claim 1 with draw shotcrete layer combined supporting structure, it is characterized in that: described in put more energy into brokenA stake footpath for stone grouting pile and element stake is 400mm, in front campshed, be in front row on adjacent position put more energy into gravel slip-casting stake (1a) andCentre-to-centre spacing between front-seat element stake (1b) is 500mm, is in rear row on the adjacent position gravel slip-casting stake (2a) of putting more energy in rear campshedWith centre-to-centre spacing between rear row element stake (2b) is 1000mm, front campshed (1) and rear campshed (2) 1800mm of being separated by.
- Double rows slip casting stake according to claim 1 with draw shotcrete layer combined supporting structure, it is characterized in that: described front campshedThe degree of depth at least reach the following 6900mm in foundation ditch bottom surface, the degree of depth of described rear campshed at least reaches the following 6700mm in foundation ditch bottom surface.
- Double rows slip casting stake according to claim 1 with draw shotcrete layer combined supporting structure, it is characterized in that: described in put more energy into brokenMetaling adopts the hard filler of size fractions of raw coal batching for stone grouting pile, described hard filler be gravelly sand, dust, circle gravel, rubble orCobble, the diameter of described hard filler is 20-25mm; Clay content in described metaling is no more than 5%, and described 5% refers to qualityPercentage; The described gravel slip-casting stake cement mortar of putting more energy into adopts 425# portland cement, and the ratio of mud is by weight percentage 1:1-0.5: 1, in described cement mortar, add by weight percentage and have 0.3% triethanolamine as early strength agent; Described metaling withThe volume ratio of cement mortar is 1: 0.8.
- Double rows slip casting stake according to claim 1 with draw shotcrete layer combined supporting structure, it is characterized in that: described in draw shotcreteLayer (4), it sprays the coagulate layer thickness forming is 80mm, strength grade of concrete is C25, adopts natural grading and diameterBe not more than the limestone gravel of 20mm, the rubble content that the diameter in limestone gravel is 10-15mm accounts for the total matter of limestone gravelThe 60%-70% of amount.
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| CN201410504680.0A CN104213566B (en) | 2014-09-26 | 2014-09-26 | Double rows slip casting stake with draw shotcrete layer combined supporting structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110565658A (en) * | 2019-08-27 | 2019-12-13 | 江苏省地质矿产局第三地质大队 | Double-row bottom-expanding long-short combined anti-slide pile for slope support |
| CN111519485A (en) * | 2020-04-30 | 2020-08-11 | 中国建筑第八工程局有限公司 | Connecting channel between foundation pits and construction method thereof |
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| CN203729308U (en) * | 2014-01-24 | 2014-07-23 | 中国建筑股份有限公司 | Double-row pile supporting system of reinforced concrete pile combined structural steel cement mixing pile wall |
| CN204059367U (en) * | 2014-09-26 | 2014-12-31 | 安徽水利开发股份有限公司 | Double rows slip casting stake with draw shotcrete layer combined retaining structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213512A (en) * | 1989-02-14 | 1990-08-24 | Toa Harbor Works Co Ltd | Method of constructing double fence using steel pipe sheet pile and method of coupling head part of steel pipe sheet pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131221A (en) * | 1995-12-29 | 1996-09-18 | 曾宪明 | Supporting and protecting method for base pit, side slope, flat anchor and spray net |
| CN201151906Y (en) * | 2007-12-06 | 2008-11-19 | 安徽省建设工程勘察设计院 | Double end assembled reinforced concrete pile |
| KR20090085448A (en) * | 2008-02-04 | 2009-08-07 | 코오롱건설주식회사 | Soil retaining method for two rows pile |
| CN203514328U (en) * | 2013-07-22 | 2014-04-02 | 深圳市工勘岩土工程有限公司 | Combined anti-slide structure |
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Effective date of registration: 20190628 Address after: 233010 No. 5183 Donghai Avenue, Bengbu City, Anhui Province Patentee after: Anhui Water Resources Development Co., Ltd. Address before: 233000 Jinjiang Business Office Building, Donghai Avenue, Bengbu City, Anhui Province Patentee before: Anhui Water Resources Development Co., Ltd. |
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