CN107090837A - Pit-in-pit reinforced concrete retaining wall composite supporting structure and construction method thereof - Google Patents
Pit-in-pit reinforced concrete retaining wall composite supporting structure and construction method thereof Download PDFInfo
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- CN107090837A CN107090837A CN201710517004.0A CN201710517004A CN107090837A CN 107090837 A CN107090837 A CN 107090837A CN 201710517004 A CN201710517004 A CN 201710517004A CN 107090837 A CN107090837 A CN 107090837A
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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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Abstract
A pit-in-pit reinforced concrete retaining wall composite supporting structure and a construction method thereof are disclosed, wherein the method comprises the following steps: arranging a drainage precipitation device in a pit in the foundation pit; step two: excavating a pit in the pit; step three: carrying out construction of side wall soil nailing wall support; step four: carrying out base layer treatment on pits in the pit; step five: constructing a cushion layer of the pit-in-pit; step six: carrying out horizontal segmentation and vertical layering on a reinforced concrete retaining wall support to be constructed in the pit-in-pit; step seven: carrying out vertical layered construction on one section of the concrete; step eight: carrying out vertical layered construction of the next section of reinforced concrete retaining wall support to be constructed; step nine: and repeating the process of the step eight until the reinforced concrete retaining wall supports arranged along the edges of the cushion layer are closed. The invention solves the technical problems of great supporting difficulty, difficult integrity and stability guarantee, large construction amount, large labor input and long construction period of the traditional brick moulding bed.
Description
Technical field
The invention belongs to building engineering construction field, in more particularly to a kind of hole hole reinforced concrete barricade composite supporting construction and
Its construction method.
Background technology
Current high-rise building is more and more, and the depth cheated in high-rise building hole is larger, often exceeds 10m, this kind of hole
Middle hole is general using combination supporting modes such as classification slope, composite soil nailing wall, steel sheet piles, and hole Zhong Keng sides wall is used as using brick loose tool
Template, it has the function of supporting cubic metre of earth concurrently simultaneously.Cheated in current increasing ultra-deep hole, especially coastal riparian area
In the case of hydrological geological conditions difference, even if the discrepancy in elevation is still larger between classification slope, each ladder, supporting difficulty is cheated in hole greatly,
During using brick loose tool as hole Zhong Keng side wall forms, its globality, stability are difficult to ensure that.Secondly, the brick loose tool amount of building by laying bricks or stones, plaster
Amount is big, and labour's input is big, and construction period is longer.
The content of the invention
The present invention proposes hole reinforced concrete barricade composite supporting construction and its construction method in a kind of hole, to solve traditional brick
Loose tool supporting difficulty is greatly, globality, stability are difficult to ensure that, great in constructing amount, labour puts into big and long construction period
Technical problem.
Technical scheme is as follows.
One kind cheats reinforced concrete barricade composite supporting construction in hole, includes the basic unit of hole Zhong Keng bottoms, is arranged in basic unit
Bed course and along bed course edge set vertical supporting；In the hole hole around side wall include from bottom to top gradually to
The slope section of outer incline；The vertical supporting be Reinforced Concrete Retaining Walls supporting, and the bottom of Reinforced Concrete Retaining Walls supporting with
Base surface is concordant；Side wall on the outside of the Reinforced Concrete Retaining Walls supporting is provided with soil-nail wall support.
It is preferred that, when the permeability rate q of the side wall soil body is：During 0 ＜ q ＜ 100Lu, side wall is slope section；The slope section
Angle of inclination is 60 °~75 °, and the bottom of slope section is concordant with base surface；The side wall and Reinforced Concrete Retaining Walls supporting
Between leave spacing, the spacing between side wall and Reinforced Concrete Retaining Walls supporting has filled with backfill.
It is preferred that, when the permeability rate q for the side wall soil body cheated in hole is：During q >=100Lu, the side wall is by slope section and tiltedly
Vertical section below the section of slope is constituted；The vertical section is pressed on the back side of Reinforced Concrete Retaining Walls supporting；The slope section inclines
Rake angle is 60 °~75 °, and slope section and the intersection of vertical face are located at the top of Reinforced Concrete Retaining Walls supporting.
The construction method of hole reinforced concrete barricade composite supporting construction in a kind of hole, including step are as follows.
Step one：After outside foundation pit construction is finished, the setting of draining dewatering device cheated in being cheated in foundation ditch is carried out.
Step 2：Excavated after the excavation cheated in being cheated, first precipitation, and keep level of ground water to be cheated in hole below excavation face
1.5m~2m.
Step 3：Carry out the construction of the soil-nail wall support of side wall.
Step 4：The base treatment cheated in being cheated.
Step 5：The cushion construction cheated in being cheated, and treat construction reinforced bar concrete guard wall supporting along the edge of bed course
Reinforcing bar reserved.
Step 6：Reinforced Concrete Retaining Walls supporting to be onstructed carries out horizontal fragmentation and vertical layered in being cheated in hole.
Step 7：The Reinforced Concrete Retaining Walls supporting to be onstructed to wherein one section carries out vertical layered construction.
Step 8：After step 7 construction is finished, the vertical of next section of Reinforced Concrete Retaining Walls supporting to be onstructed is carried out
Construction in layer.
Step 9：The process of repeat step eight, until being closed along the Reinforced Concrete Retaining Walls supporting that bed course edge is set.
It is preferred that, setting draining dewatering device specific method is in step one：In hole Zhong Keng bottoms, the position close to axis
Place, in the axial direction interval setting gutter one, and the setting sump one in gutter one；The sump one is provided with one
Spacing between group, the long axis direction interval setting along gutter one, adjacent sump one is 20m~30m；In sump one
Suction pump one is set.
It is preferred that, the excavation cheated in the hole in step 2 is, according to the shape, size and depth cheated in hole, and to consider each
The interspersed construction of process, subregion staged and layered is excavated successively.
It is preferred that, in step 3, the soil-nail wall support for the side wall cheated in hole is specially using the sequence of construction sprayed after first anchor
When the excavation face cheated in hole is dug to first layer design anchor pole position, first layer anchor pole is squeezed into；Continue to excavate, when what is cheated in hole
When excavation face is dug to second layer design anchor pole position, then squeeze into second layer anchor pole；So circulation is until excavation face is dug to most lower
When at layer design anchor pole position, orlop anchor pole is squeezed into；Then internal layer concrete layer is sprayed on the wall of side, internal layer concrete layer
Thickness is 50~60mm, is anchored immediately；Fill-before-fire outer concrete layer, the thickness of outer concrete layer is 50~60mm.
It is preferred that, when the permeability rate q for the side wall soil body cheated in hole is：During 0 ＜ q ＜ 100Lu, the slope section bottom of side wall with
Base surface is concordant；The soil-nail wall support is constructed to hole Zhong Keng bottoms；
When the permeability rate q for the side wall soil body cheated in hole is：Permeability rate q >=100Lu, the slope section bottom of side wall is located at reinforcing bar
Concrete guard wall supporting is designed at intersection location with slope section, and the soil-nail wall support is constructed to the bottom position of slope section.
It is preferred that, when the permeability rate q for the side wall soil body cheated in hole is：During permeability rate q >=100Lu, the step 3 and step
Also include along slope section bottom edge between rapid four and squeeze into steel sheet pile；Steel sheet pile squeezes into method using vibration；Insert steel sheet pile
When, fore shaft is aligned, one piece of steel sheet pile is often inserted, that is, puts pile cover, and lightly hammered；During piling, to protect
The perpendicularity of steel sheet pile is demonstrate,proved, in steel sheet pile front and back, sets vertical line to observe and is controlled by, correction is checked at any time；
In step 7, when carrying out vertical layered construction to wherein one section Reinforced Concrete Retaining Walls supporting to be onstructed, with
The stake top absolute altitude of steel sheet pile is that Reinforced Concrete Retaining Walls supporting is divided into two layers by boundary line；Unilateral mold method is first used by lower floor's steel
Reinforced concrete retaining wall is poured to steel sheet pile stake top absolute altitude, and the supporting of top bars concrete guard wall is poured using two-sided formwork
Build, the designed elevation of one-time-concreting to Reinforced Concrete Retaining Walls supporting；
After Reinforced Concrete Retaining Walls supporting construction in step 9 is finished, by between side wall and Reinforced Concrete Retaining Walls supporting
Steel sheet pile extract.
It is preferred that, when the permeability rate q for the side wall soil body cheated in hole is：During 0 ＜ q ＜ 100Lu, to wherein one in step 7
When section Reinforced Concrete Retaining Walls supporting to be onstructed carries out vertical layered construction, it is divided into two layers and pours；Lower floor's armored concrete gear
It is 1800mm~2200mm that wall supporting, which pours height, and top bars concrete guard wall supporting treats that first pouring part concrete strength reaches
When 70%, one-time-concreting to designed elevation；
After Reinforced Concrete Retaining Walls supporting construction in step 9 is finished, cheated in Reinforced Concrete Retaining Walls supporting and hole
Backfill is filled in spacing between the wall of side, and is compacted；So far construction is finished.
Beneficial effects of the present invention are as follows.
1st, the present invention is to ensure the globality of hole supporting in hole, stability, construction period reduced, by using reinforced concrete
Native retaining wall substitutes traditional brick loose tool, enhances the globality and stability that supporting is cheated in hole, and avoid substantial amounts of
Build by laying bricks or stones, float work, shorten construction period.
2nd, the construction method in the present invention is constructed compared with traditional brick loose tool, using double with bilayer in Reinforced Concrete Retaining Walls supporting
To reinforcing bar, more than wall thickness 300mm cheats interior using covered reinforced-concrete retaining wall, by common plain concrete bed course in hole
Reinforce and match somebody with somebody the thickness C30 concrete bed courses of single-layer bidirectional reinforcing bar 250 to be interior, and it is formed entirety with reinforced concrete barricade, enhancing concrete barricade
Resistance to capsizing, is prevented effectively from brick loose tool and the technical problem that stability is poor, easily topple is cheated in Bracing Process in hole.
3rd, the construction of the Reinforced Concrete Retaining Walls supporting in the present invention is horizontal direction section construction, and vertical direction layering is applied
Work, this construction method avoids that Reinforced Concrete Retaining Walls supporting is oversize or too high and loss of stability, therefore the present invention is applied
Structural stability is strong during work, available for cheating supporting construction in the hole of different depth.
4th, the Reinforced Concrete Retaining Walls supporting in the present invention is cast in situs, compared with the construction of traditional brick loose tool, without the place that plasters
Waterproof matrix is managed, construction cost is reduced, the duration is saved, Forming Quality is good.
5th, the present invention cheats supporting suitable for high-rise building hole.
Brief description of the drawings
Fig. 1 is hole draining precipitation schematic diagram in foundation ditch of the present invention and hole.
Lower floor's Reinforced Concrete Retaining Walls supporting pours the structural representation of completion in the step of Fig. 2 is embodiment one seven.
Reinforced Concrete Retaining Walls supporting pours the structural representation of completion to the step of Fig. 3 is embodiment one seven at the middle and upper levels.
The structural representation that Fig. 4 finishes for the steel sheet pile construction of embodiment two.
Lower floor's Reinforced Concrete Retaining Walls supporting pours the structural representation of completion in the step of Fig. 5 is embodiment two seven.
Reinforced Concrete Retaining Walls supporting pours the structural representation of completion to the step of Fig. 6 is embodiment two seven at the middle and upper levels.
Reference：1- bed courses, 2- sides wall, the supporting of 3- Reinforced Concrete Retaining Walls, 4- soil-nail wall supports, 5- backfills
Soil, 6- basic units, 7- reinforcing bars, 8- gutters one, 9- sumps one, 10- suction pumps one, 11- steel sheet piles, 12- gutters
2nd, 13- sumps two, 14- suction pumps two, 15- foundation pit supporting piles, 16- intercepting ditch, 17- drainpipes one, 18- drainings
Pipe two, 19- water resource recycling devices.
Embodiment
Embodiment one
As Figure 1-3, reinforced concrete barricade composite supporting construction is cheated in this hole, include hole Zhong Keng bottoms basic unit 6,
The bed course 1 being arranged in basic unit 6 and the vertical supporting set along the edge of bed course 1；It is characterized in that：Around being cheated in the hole
Side wall 2 include from bottom to top gradually outward-dipping slope section；The vertical supporting is Reinforced Concrete Retaining Walls supporting 3,
And the bottom of Reinforced Concrete Retaining Walls supporting 3 is concordant with the bottom surface of bed course 1；The side wall 2 in the outside of Reinforced Concrete Retaining Walls supporting 3
It is provided with soil-nail wall support 4.
In the present embodiment, the permeability rate q of the soil body of side wall 2 is：0 ＜ q ＜ 100Lu, side wall 2 is slope section；It is described oblique
The angle of inclination of slope section is 60 °~75 °, and the bottom of slope section is concordant with the bottom surface of bed course 1；The side wall 2 and armored concrete
Spacing is left between retaining wall 3, the spacing between side wall 2 and Reinforced Concrete Retaining Walls supporting 3 has filled with backfill 5.
In the present embodiment, as the permeability rate q ＜ 1Lu of the soil body of side wall 2, soil body water penetration is micro- water penetration；When the soil body
During permeability rate 1≤q ＜ 10Lu, soil body water penetration is weak water penetration；As permeability rate 10≤q ＜ 100Lu of the soil body, soil body water penetration
For middle water penetration.
The construction method of hole reinforced concrete barricade composite supporting construction in this hole, including step are as follows.
Step one：After outside foundation pit construction is finished, the setting of draining dewatering device cheated in being cheated in foundation ditch is carried out.
Step 2：Excavated after the excavation cheated in being cheated, first precipitation, and keep level of ground water to be cheated in hole below excavation face
1.5m~2m；The excavation cheated in hole is, according to the shape, size and depth cheated in hole, and to consider the interspersed construction of each process, point
Area's staged and layered is excavated successively；Before hole is excavated in hole must strict guarantee constructed each component of soil-nail wall support 4 of completion
Curing time, it is ensured that it, which reaches, can excavate the next layer of earthwork after enough intensity.
Step 3：The construction for the soil-nail wall support 4 of side wall 2 cheated in being cheated；The soil-nail wall support 4 of side wall 2 cheated in hole is adopted
It is specially, when the excavation face cheated in hole is dug to first layer design anchor pole position, to squeeze into the with the sequence of construction sprayed after first anchor
One layer of anchor pole；Continue to excavate, when the excavation face cheated in hole is dug to second layer design anchor pole position, then squeeze into second layer anchor
Bar；So circulation is until when excavation face is dug to orlop design anchor pole position, squeeze into orlop anchor pole；Then in the side of foundation ditch
Internal layer concrete layer is sprayed on wall 2, the thickness of internal layer concrete layer is 50~60mm, is anchored immediately；Fill-before-fire outer layer is mixed
Solidifying soil layer, the thickness of outer concrete thickness is 50~60mm；Cement mortar or cement mortar are preferably being used to bolt grouting material, is being noted
Grouting pipe mouthful is embedded in below slurry surface all the time during slurry, to ensure that gas can be escaped all in hole；The soil nailing of side wall 2
The construction of wall supporting 4 extremely hole Zhong Keng bottoms.
Step 4：The basic unit 6 cheated in being cheated is handled；When substrate is soil property, compacting should be flattened, to being soaked by water
Substrate soil, particularly soft soil should be removed all, if bearing capacity does not reach requirement, need to be changed with water penetration and stability
Good material and rammer is filled to designed elevation；When substrate is rock foundation, if finding rock stratum hole, crack, crack should be regarded
Opening width with cement mortar or micro aggregate concrete, cement or other dual liquid type slurries etc. pour into a mould saturation.
Step 5：The bed course 1 cheated in being cheated is constructed, and single-layer bidirectional reinforcing bar is matched somebody with somebody in bed course 1, using C30 concrete placings, thickness
For 250mm, and the reinforcing bar 7 for treating construction reinforced bar concrete guard wall supporting 3 along the edge of bed course 1 is reserved, and makes itself and reinforcing bar
Concrete barricade forms entirety, and the resistance to capsizing of reinforcing steel bar concrete guard wall supporting 3 is prevented effectively from brick loose tool and supporting is cheated in hole
During stability is poor, the technical problem easily toppled.
Step 6：Reinforced Concrete Retaining Walls supporting 3 to be onstructed carries out horizontal fragmentation and vertical layered in being cheated in hole.
Step 7：The Reinforced Concrete Retaining Walls supporting to be onstructed to wherein one section carries out vertical layered construction；It will first wait to apply
The Reinforced Concrete Retaining Walls of work are divided into two layers；Lower floor's Reinforced Concrete Retaining Walls supporting is poured to 1800mm~2200mm, depending on scene
Situation, the height of generally one piece template, top bars concrete guard wall supporting is once poured when partial intensities are first poured up to 70%
Build to designed elevation；
Different with wall thickness according to the reinforced concrete retaining wall height in being cheated in hole, specific type selecting is as follows.
Wall thickness type selecting
The formwork reinforcement of Reinforced Concrete Retaining Walls supporting is using wooden plywood, wooden a tree, used in making timber for boats, Φ 48*3.6 steel pipes and M14 sealings
Type screw rod through walls；Vertical back cord is the wooden a tree, used in making timber for boats of 45 × 90mm, spacing≤250mm；Back cord laterally uses double steel pipe, vertical spacing
500mm；The transverse direction of screw rod through walls × vertical spacing is≤500 × 500mm.
Step 8：After step 7 construction is finished, the vertical of next section of Reinforced Concrete Retaining Walls supporting to be onstructed is carried out
Construction in layer.
Step 9：The process of repeat step eight, until the Reinforced Concrete Retaining Walls supporting 3 set along the edge of bed course 1 is closed；
When the Reinforced Concrete Retaining Walls supporting 3 in hole in hole, which is closed, to be set, concrete bed course 1 need to be thickeied, and it is interior with single-layer bidirectional reinforcing bar with
Concrete barricade formation one-piece casting, strengthens the resistance to capsizing of concrete barricade.
Step 10：Backfill 5 is filled in spacing between the side wall 2 cheated in Reinforced Concrete Retaining Walls supporting 3 and hole, and
Compacting；So far construction is finished.
In the present embodiment, setting draining dewatering device specific method is in step one：In hole Zhong Keng bottoms, close to axis
At position, gutter 1, and the setting sump 1 in gutter 1 are arranged at intervals in the axial direction；The sump 1
It is arranged at intervals provided with one group, along the long axis direction in gutter 1, the spacing between adjacent sump 1 is 20m~30m；In collection
Suction pump 1 is set in well 1；Hole Zhong Keng sides are dug downwards, while adding gutter 1 and sump 1, remain draining
The bottom of trench of ditch 1 is not less than 0.4m less than foundation ditch bottom, and the bottom of sump 1 is not less than 1m less than the bottom in gutter 1；Catchment
Water in well 1 should be with collection with row.
In the present embodiment, the sump 1 is the wide finished product perforate steel pipe sumps of 600mm.
In the present embodiment, construction site precipitation must be carried out in outside excavation of foundation pit first half of the month, level of ground water is existed
0.5m below excavation of foundation pit face；When being excavated to bottom of foundation ditch, also need to ensure level of ground water 1.5m below foundation ditch bottom surface；Precipitation mistake
Journey should be with earth excavation and the work progress of foundation pit supporting pile 15 all the time.
, be as the case may be in foundation ditch at toe, along toe in outside Excavation Process in the present embodiment
The direction of line sets gutter 2 12, and the setting wide finished product perforate steel pipe sumps 2 13 of 600mm in gutter 2 12；It is described
Sump 2 13 is arranged at intervals provided with one group, along the long axis direction in gutter 2 12, and the spacing between adjacent sump 2 13 is
20m~30m；Suction pump 2 14 is set in sump 2 13；Foundation ditch side is dug downwards, while adding gutter 2 12 and sump two
13, remain that the bottom of trench in gutter 2 12 is not less than 0.4m less than foundation ditch bottom, the bottom of sump 2 13 is less than gutter 2 12
Bottom be not less than 1m；Water in sump 2 13, to prevent surface water from flowing into foundation ditch, should be opened with collection with row at the top of foundation ditch
Digging 0.5m or so on the outside of contour line sets intercepting ditch 16 to close sump 2 13 when base plate of foundation pit casting concrete, irrigates micro- swollen
Swollen property concrete, and it is welded with steel plate closing.
In the present embodiment, the water in hole in hole is evacuated to the underfooting of foundation pit supporting pile 15 by suction pump 1 and drainpipe 1
Gutter 2 12, then the water resource for draining into Foundation Pit top by the suction pump 2 14 and drainpipe 2 18 in sump 2 13 follows
Ring is precipitated, filtered using equipment 19.
Embodiment two
As shown in Fig. 1,4-6, plant and reinforced concrete barricade composite supporting construction cheated in hole, include hole Zhong Keng bottoms basic unit 6,
The bed course 1 being arranged in basic unit 6 and the vertical supporting set along the edge of bed course 1；It is characterized in that：Around being cheated in the hole
Side wall 2 include from bottom to top gradually outward-dipping slope section；The vertical supporting is Reinforced Concrete Retaining Walls supporting 3,
And the bottom of Reinforced Concrete Retaining Walls supporting 3 is concordant with the bottom surface of bed course 1；The side wall 2 in the outside of Reinforced Concrete Retaining Walls supporting 3
It is provided with soil-nail wall support 4.
In the present embodiment, the permeability rate q of the soil body of side wall 2 is：Q >=100Lu, the side wall 2 is by slope section and slope
Vertical section below section is constituted；The vertical section is pressed on the back side of Reinforced Concrete Retaining Walls supporting 3；The inclination of the slope section
Angle is 60 °~75 °, and slope section and the intersection of vertical face are located at the top of Reinforced Concrete Retaining Walls supporting 3.
In the present embodiment, when the permeability rate q for the soil body of side wall 2 cheated in hole is：During permeability rate q >=100Lu, the soil body it is permeable
Property be middle water penetration.
The construction method of hole reinforced concrete barricade composite supporting construction in this hole, including step are as follows.
Step one：After outside foundation pit construction is finished, the setting of draining dewatering device cheated in being cheated in foundation ditch is carried out.
Step 2：Excavated after the excavation cheated in being cheated, first precipitation, and keep level of ground water to be cheated in hole below excavation face
1.5m~2m；The excavation cheated in hole is, according to the shape, size and depth cheated in hole, and to consider the interspersed construction of each process, point
Area's staged and layered is excavated successively；Before hole is excavated in hole must strict guarantee constructed each component of soil-nail wall support 4 of completion
Curing time, it is ensured that it, which reaches, can excavate the next layer of earthwork after enough intensity.
Step 3：The construction for the soil-nail wall support 4 of side wall 2 cheated in being cheated；The soil-nail wall support 4 of side wall 2 cheated in hole is adopted
It is specially, when the excavation face cheated in hole is dug to first layer design anchor pole position, to squeeze into the with the sequence of construction sprayed after first anchor
One layer of anchor pole；Continue to excavate, when the excavation face cheated in hole is dug to second layer design anchor pole position, then squeeze into second layer anchor
Bar；So circulation is until when excavation face is dug to orlop design anchor pole position, squeeze into orlop anchor pole；Then in the side of foundation ditch
Internal layer concrete layer is sprayed on wall 2, the thickness of internal layer concrete layer is 50~60mm, is anchored immediately；Fill-before-fire outer layer is mixed
Solidifying soil layer, the thickness of outer concrete thickness is 50~60mm；Cement mortar or cement mortar are preferably being used to bolt grouting material, is being noted
Grouting pipe mouthful is embedded in below slurry surface all the time during slurry, to ensure that gas can be escaped all in hole；The bottom position of side wall 2
At Reinforced Concrete Retaining Walls supporting 3 and the design intersection location of side wall 2, the construction of soil-nail wall support 4 of the side wall 2 is constructed to steel
Reinforced concrete retaining wall 3 is designed at intersection location with side wall 2.
After the completion of work progress in step 3, steel sheet pile 11 is squeezed into along the bottom margin of side wall 2；Steel sheet pile 11 is used
Method is squeezed into vibration；When inserting steel sheet pile 11, fore shaft is aligned, one piece of steel sheet pile 11 is often inserted, that is, puts pile cover, and lightly add
To hammer；During piling, to ensure the perpendicularity of steel sheet pile, vertical line is set to see in steel sheet pile front and back both direction
Examine and be controlled by, correction is checked at any time；, can be using the stake of grouting cable anchor strengthening steel slab to improve the stability of the supporting of steel sheet pile 11
11；Anchor cable is arranged on the back side of steel sheet pile 11 using secondary grouting technique, and one end of anchor cable is connected on steel sheet pile, anchor cable it is another
One end is anchored in the soil body, starches the grouting method of side tube drawing during slip casting using marginal not.
Step 4：The basic unit 6 cheated in being cheated is handled；When substrate is soil property, compacting should be flattened, to being soaked by water
Substrate soil, particularly soft soil should be removed all, if bearing capacity does not reach requirement, need to be changed with water penetration and stability
Good material and rammer is filled to designed elevation；When substrate is rock foundation, if finding rock stratum hole, crack, crack should be regarded
Opening width with cement mortar or micro aggregate concrete, cement or other dual liquid type slurries etc. pour into a mould saturation.
Step 5：The bed course 1 cheated in being cheated is constructed, and single-layer bidirectional reinforcing bar is matched somebody with somebody in bed course 1, using C30 concrete placings, thickness
For 250mm, and the reinforcing bar 7 for treating construction reinforced bar concrete guard wall supporting 3 along the edge of bed course 1 is reserved, and makes itself and reinforcing bar
Concrete barricade forms entirety, and the resistance to capsizing of reinforcing steel bar concrete guard wall supporting 3 is prevented effectively from brick loose tool and supporting is cheated in hole
During stability is poor, the technical problem easily toppled.
Step 6：Reinforced Concrete Retaining Walls supporting 3 to be onstructed carries out horizontal fragmentation and vertical layered in being cheated in hole.
Step 7：The Reinforced Concrete Retaining Walls supporting to be onstructed to wherein one section carries out vertical layered construction；With steel sheet pile
11 stake top absolute altitudes are that Reinforced Concrete Retaining Walls supporting is divided into two layers by boundary line；Unilateral mold method is first used by lower floor's reinforced concrete
Native retaining wall is poured to the stake top absolute altitude of steel sheet pile 11, and the supporting of top bars concrete guard wall is poured using two-sided formwork, and one
It is secondary to pour to the designed elevation of Reinforced Concrete Retaining Walls supporting.
Different with wall thickness according to the reinforced concrete retaining wall height in being cheated in hole, specific type selecting is as follows.
Wall thickness type selecting
| Side form height (㎜) | Wall thickness (㎜) |
| 4700≥h | It is interior to match somebody with somebody the reinforcing bars of 14@of double-layer double-direction Φ 300 using the thick Reinforced Concrete Retaining Walls supportings of 300mm. |
| 6700 >=h ＞ 4700 | Using the thick reinforced concrete wall supportings of 400mm, inside match somebody with somebody four layers of two-way reinforcing bars of 14@of Φ 200 |
The formwork reinforcement of Reinforced Concrete Retaining Walls supporting is using wooden plywood, wooden a tree, used in making timber for boats, Φ 48*3.6 steel pipes and M14 sealings
Type screw rod through walls；Vertical back cord is the wooden a tree, used in making timber for boats of 45 × 90mm, spacing≤250mm；Back cord laterally uses double steel pipe, vertical spacing
500mm；The transverse direction of screw rod through walls × vertical spacing is≤500 × 500mm.
Step 8：After step 7 construction is finished, the vertical of next section of Reinforced Concrete Retaining Walls supporting to be onstructed is carried out
Construction in layer.
Step 9：The process of repeat step eight, until the Reinforced Concrete Retaining Walls supporting 3 set along the edge of bed course 1 is closed；
When the Reinforced Concrete Retaining Walls supporting 3 in hole in hole, which is closed, to be set, concrete bed course 1 need to be thickeied, and it is interior with single-layer bidirectional reinforcing bar with
Concrete barricade formation one-piece casting, strengthens the resistance to capsizing of concrete barricade.
Step 10：After the construction of Reinforced Concrete Retaining Walls supporting 3 is finished, by between side wall 2 and Reinforced Concrete Retaining Walls supporting 3
Steel sheet pile 11 extract.
In the present embodiment, setting draining dewatering device specific method is in step one：In hole Zhong Keng bottoms, close to axis
At position, gutter 1, and the setting sump 1 in gutter 1 are arranged at intervals in the axial direction；The sump 1
It is arranged at intervals provided with one group, along the long axis direction in gutter 1, the spacing between adjacent sump 1 is 20m~30m；In collection
Suction pump 1 is set in well 1；Hole Zhong Keng sides are dug downwards, while adding gutter 1 and sump 1, remain draining
The bottom of trench of ditch 1 is not less than 0.4m less than foundation ditch bottom, and the bottom of sump 1 is not less than 1m less than the bottom in gutter 1；Catchment
Water in well 1 should be with collection with row.
In the present embodiment, the sump 1 is the wide finished product perforate steel pipe sumps of 600mm.
In the present embodiment, construction site precipitation must be carried out in outside excavation of foundation pit first half of the month, level of ground water is existed
0.5m below excavation of foundation pit face；When being excavated to bottom of foundation ditch, also need to ensure level of ground water 1.5m below foundation ditch bottom surface；Precipitation mistake
Journey should be with earth excavation and the work progress of foundation pit supporting pile 15 all the time.
, be as the case may be in foundation ditch at toe, along toe in outside Excavation Process in the present embodiment
The direction of line sets gutter 2 12, and the setting wide finished product perforate steel pipe sumps 2 13 of 600mm in gutter 2 12；It is described
Sump 2 13 is arranged at intervals provided with one group, along the long axis direction in gutter 2 12, and the spacing between adjacent sump 2 13 is
20m~30m；Suction pump 2 14 is set in sump 2 13；Foundation ditch side is dug downwards, while adding gutter 2 12 and sump two
13, remain that the bottom of trench in gutter 2 12 is not less than 0.4m less than foundation ditch bottom, the bottom of sump 2 13 is less than gutter 2 12
Bottom be not less than 1m；Water in sump 2 13, to prevent surface water from flowing into foundation ditch, should be opened with collection with row at the top of foundation ditch
Digging 0.5m or so on the outside of contour line sets intercepting ditch 16 to close sump 2 13 when base plate of foundation pit casting concrete, irrigates micro- swollen
Swollen property concrete, and it is welded with steel plate closing.
In the present embodiment, the water in hole in hole is evacuated to the underfooting of foundation pit supporting pile 15 by suction pump 1 and drainpipe 1
Gutter 2 12, then the water resource for draining into Foundation Pit top by the suction pump 2 14 and drainpipe 2 18 in dewatering well 2 13 follows
Ring is precipitated, filtered using equipment 19.
Claims (10)
1. one kind cheats reinforced concrete barricade composite supporting construction in hole, include the basic unit (6) of hole Zhong Keng bottoms, be arranged on basic unit
(6) bed course (1) on and the vertical supporting along the setting of bed course (1) edge；It is characterized in that：Side in the hole around hole
Wall (2) includes from bottom to top gradually outward-dipping slope section；The vertical supporting is Reinforced Concrete Retaining Walls supporting (3),
And the bottom of Reinforced Concrete Retaining Walls supporting (3) is concordant with bed course (1) bottom surface；On the outside of the Reinforced Concrete Retaining Walls supporting (3)
Side wall (2) be provided with soil-nail wall support (4).
2. cheat reinforced concrete barricade composite supporting construction in a kind of hole according to claim 1, it is characterised in that：When side wall
(2) the permeability rate q of the soil body is：During 0 ＜ q ＜ 100Lu, side wall (2) is slope section；The angle of inclination of the slope section be 60 °~
75 °, and the bottom of slope section is concordant with bed course (1) bottom surface；Stayed between the side wall (2) and Reinforced Concrete Retaining Walls supporting (3)
There is spacing, the spacing between side wall (2) and Reinforced Concrete Retaining Walls supporting (3) has filled with backfill (5).
3. cheat reinforced concrete barricade composite supporting construction in a kind of hole according to claim 1, it is characterised in that：When side wall
(2) the permeability rate q of the soil body is：During q >=100Lu, vertical section of the side wall (2) below slope section and slope section is constituted；Institute
State the back side that vertical section is pressed on Reinforced Concrete Retaining Walls supporting (3)；The angle of inclination of the slope section is 60 °~75 °, and tiltedly
The intersection of slope section and vertical face is located at the top of Reinforced Concrete Retaining Walls supporting (3).
4. the construction method of reinforced concrete barricade composite supporting construction is cheated in the hole described in a kind of claim 1, it is characterised in that bag
Include step as follows：
Step one：After outside foundation pit construction is finished, the setting of draining dewatering device cheated in being cheated in foundation ditch is carried out；
Step 2：Excavated after the excavation cheated in being cheated, first precipitation, and keep level of ground water to cheat 1.5m below excavation face in hole
~2m；
Step 3：Carry out the construction of the soil-nail wall support (4) of side wall (2)；
Step 4：Basic unit (6) processing cheated in being cheated；
Step 5：Bed course (1) construction cheated in being cheated, and treat construction reinforced bar concrete guard wall branch along the edge of bed course (1)
The reinforcing bar (7) of shield (3) is reserved；
Step 6：Reinforced Concrete Retaining Walls supporting (3) to be onstructed carries out horizontal fragmentation and vertical layered in being cheated in hole；
Step 7：The Reinforced Concrete Retaining Walls supporting to be onstructed to wherein one section carries out vertical layered construction；
Step 8：After step 7 construction is finished, the vertical layered of next section of Reinforced Concrete Retaining Walls supporting to be onstructed is carried out
Construction；
Step 9：The process of repeat step eight, until being closed along the Reinforced Concrete Retaining Walls supporting (3) that bed course (1) edge is set.
5. the construction method of reinforced concrete barricade composite support is cheated in a kind of hole according to claim 4, it is characterised in that：Step
Setting draining dewatering device specific method is in rapid one：
In hole Zhong Keng bottoms, at the position of axis, interval setting gutter one (8), and in gutter one in the axial direction
(8) sump one (9) is set in；The sump one (9) is arranged at intervals provided with one group, along the long axis direction in gutter one (8),
Spacing between adjacent sump one (9) is 20m~30m；Suction pump one (10) is set in sump one (9).
6. the construction method of reinforced concrete barricade composite support is cheated in a kind of hole according to claim 4, it is characterised in that：Step
The excavation cheated in hole in rapid two is, according to the shape, size and depth cheated in hole, and to consider the interspersed construction of each process, subregion
Staged and layered is excavated successively.
7. the construction method of reinforced concrete barricade composite support is cheated in a kind of hole according to claim 4, it is characterised in that：Step
In rapid three, the soil-nail wall support (4) of the side wall (2) cheated in hole is using the sequence of construction sprayed after first anchor, specially when being cheated in hole
When excavation face is dug to first layer design anchor pole position, first layer anchor pole is squeezed into；Continue excavate, when the excavation face cheated in hole dig to
When at second layer design anchor pole position, then squeeze into second layer anchor pole；So circulation designs anchor pole until excavation face is dug to orlop
When at position, orlop anchor pole is squeezed into；Then internal layer concrete layer is sprayed on side wall (2), the thickness of internal layer concrete layer is
50~60mm, is anchored immediately；Fill-before-fire outer concrete layer, the thickness of outer concrete layer is 50~60mm.
8. the construction method of reinforced concrete barricade composite support is cheated in a kind of hole according to claim 7, it is characterised in that：
When the permeability rate q of side wall (2) soil body cheated in hole is：During 0 ＜ q ＜ 100Lu, the slope section bottom of side wall (2) and bed course
(1) bottom surface is concordant；Soil-nail wall support (4) construction extremely hole Zhong Keng bottoms；
When the permeability rate q of side wall (2) soil body cheated in hole is：Permeability rate q >=100Lu, the slope section bottom of side wall (2) is located at steel
Reinforced concrete retaining wall (3) is designed at intersection location with slope section, soil-nail wall support (4) construction to the bottom of slope section
At position.
9. the construction method of reinforced concrete barricade composite support is cheated in a kind of hole according to claim 8, it is characterised in that：When
The permeability rate q of side wall (2) soil body cheated in hole is：During permeability rate q >=100Lu, also include between the step 3 and step 4
Have along slope section bottom edge and squeeze into steel sheet pile (11)；Steel sheet pile (11) squeezes into method using vibration；When inserting steel sheet pile (11),
Fore shaft is aligned, one piece of steel sheet pile (11) is often inserted, that is, puts pile cover, and lightly hammered；During piling, to protect
The perpendicularity of steel sheet pile (11) is demonstrate,proved, in steel sheet pile (11) front and back, sets vertical line to observe and is controlled by, school is checked at any time
Just；
In step 7, when carrying out vertical layered construction to wherein one section Reinforced Concrete Retaining Walls supporting to be onstructed, with steel plate
Stake (11) stake top absolute altitude is that Reinforced Concrete Retaining Walls supporting (3) is divided into two layers by boundary line；Unilateral mold method is first used by lower floor
Reinforced Concrete Retaining Walls supporting is poured to steel sheet pile (11) stake top absolute altitude, and the supporting of top bars concrete guard wall uses two-sided branch
Mould is poured, the designed elevation of one-time-concreting to Reinforced Concrete Retaining Walls supporting (3)；
After Reinforced Concrete Retaining Walls supporting (3) construction in step 9 is finished, by side wall (2) and Reinforced Concrete Retaining Walls supporting
(3) steel sheet pile (11) between is extracted.
10. the construction method of reinforced concrete barricade composite support is cheated in a kind of hole according to claim 8, it is characterised in that：
When the permeability rate q of side wall (2) soil body cheated in hole is：During 0 ＜ q ＜ 100Lu, to wherein one section steel to be onstructed in step 7
When reinforced concrete retaining wall carries out vertical layered construction, it is divided into two layers and pours；Lower floor's Reinforced Concrete Retaining Walls supporting pours height
Spend for 1800mm~2200mm, the supporting of top bars concrete guard wall is once poured when part concrete strength is first poured up to 70%
Build to designed elevation；
After Reinforced Concrete Retaining Walls supporting (3) construction in step 9 is finished, in Reinforced Concrete Retaining Walls supporting (3) with being cheated in hole
Side wall (2) between spacing in filling backfill (5), and be compacted；So far construction is finished.
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| CN113152413A (en) * | 2021-04-30 | 2021-07-23 | 中国葛洲坝集团第一工程有限公司 | Ship lock crack treatment construction method |
| CN115341542A (en) * | 2022-09-08 | 2022-11-15 | 中建八局第二建设有限公司 | Breaking hammer with annular clamp and construction method for supporting steel pipe in pit area in deep foundation pit |
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| CN115341542A (en) * | 2022-09-08 | 2022-11-15 | 中建八局第二建设有限公司 | Breaking hammer with annular clamp and construction method for supporting steel pipe in pit area in deep foundation pit |
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