CN108643191A - A kind of supporting construction and its construction method of ultra-deep piping lane foundation pit - Google Patents
A kind of supporting construction and its construction method of ultra-deep piping lane foundation pit Download PDFInfo
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- CN108643191A CN108643191A CN201810349159.2A CN201810349159A CN108643191A CN 108643191 A CN108643191 A CN 108643191A CN 201810349159 A CN201810349159 A CN 201810349159A CN 108643191 A CN108643191 A CN 108643191A
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- foundation pit
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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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of supporting construction and its construction method of ultra-deep piping lane foundation pit, are related to piping lane foundation pit construction field.Slope retaining is combined with cast-in-situ bored pile supporting and is applied to ultra-deep piping lane pattern foundation pit supporting structure by the present invention, the supporting construction is divided into sloping timbering section from top to bottom and cast-in-place concrete pile supporting section had both avoided the single problem big using earthwork excavated volume when slope retaining, the problem of in turn avoiding cannot be guaranteed safely when single use cast-in-situ bored pile supporting；The supporting construction of ultra-deep piping lane foundation pit of the present invention and its operability of construction method are strong, reduce ultra-deep foundation pit support cost, significantly shorten the construction period.
Description
Technical field
The present invention relates to pattern foundation pit supporting structure field more particularly to a kind of supporting construction and its construction party of ultra-deep piping lane foundation pit
Method.
Background technology
China's underground pipe gallery is gradually obtained achieving fast development, the importance of underground pipe gallery in recent years
The approval in more and more cities, underground pipe gallery have become the indispensable mating urban operating mechanism in city, underground integrated pipe
Corridor usually build underground 8m or so in, and when underground pipe gallery conflicts with the urban operating mechanism that other are planned, often through reduction
Underground pipe gallery constructive depth, general such situation piping lane will build underground 20m in.Urban Underground pipe gallery ultra-deep foundation pit branch
The expense of shield accounts for about the 60% of total cost, if all being excavated using slope, earth volume will greatly increase, if all using drilling
Bored concrete pile supporting, do mechanization operation will be restricted significantly by being supported between stake, reduce shoveling efficiency.By being applied to cut and cover method ultra-deep foundation pit
Work technology is studied, and carries out, than choosing, seeking a kind of low cost, easily ultra-deep base by economy, safety, operability
The method for protecting support in hole.
Invention content
Above-mentioned in order to solve the problems, such as, the present invention proposes a kind of supporting construction and its construction party of ultra-deep piping lane foundation pit
The supporting construction of method, the ultra-deep piping lane foundation pit is combined slope retaining with cast-in-situ bored pile supporting, is ensureing ultra-deep foundation pit safety
Property while, reduce ultra-deep foundation pit earthwork excavated volume, do mechanization operation efficiency improve, operability is strong, compared to single branch
Shield mode reduces ultra-deep foundation pit support cost.
To achieve the goals above, the supporting construction of ultra-deep piping lane foundation pit of the present invention includes：The supporting construction by
On be divided into sloping timbering section and cast-in-place concrete pile supporting section downwards.
Further, the sloping timbering section excavates the earthwork downwards by ground, sequentially forms level-one side slope, two from top to bottom
The first riding track of item, two level side slope and two the second riding tracks；The top of the slope of the level-one side slope is connect with ground, first riding track
Edge is separately connected the top of the slope of the bottom of slope and two level side slope of level-one side slope, and the bottom of slope of the two level side slope connects the outer of the second riding track
Lateral edges；One layer of first steel plate of part ground laying of the level-one side slope, the first riding track, two level side slope and margin of foundation pit
Net；Several horizontal drain holes are preset in level-one side slope and two level side slope, the drain hole passes through the first expanded metal lath to be embedded in soil layer；
A layer concrete is sprayed on first expanded metal lath.
Further, the first soil nailing, first soil are equipped at the part ground of the margin of foundation pit and the first riding track
Nail is embedded in soil layer vertically across the first expanded metal lath.
Further, the second soil nailing is equipped at the level-one side slope, second soil nailing passes through the vertical slope of the first expanded metal lath
Face is embedded in soil layer.
Further, soil bolt is equipped at the two level side slope, the soil bolt passes through the vertical slope of the first expanded metal lath
Face is embedded in soil layer.
Further, the cast-in-place concrete pile supporting section excavates earthwork shape straight down by the second riding track inside edge
At；The both sides of the cast-in-place concrete pile supporting section are equidistantly positioned two rows of vertical cast-in-situ bored piles；Two row hole drilling fills
The top difference longitudinal direction for noting stake is equipped with horizontal Guan Liang, and horizontal bracing members are equipped between described two longitudinal Guan Liangs；Described two
Suspension is fixed with the second expanded metal lath between the stake of gang drill hole pouring pile, sprays a layer concrete on second expanded metal lath.
Further, the bottom of cast-in-place concrete pile supporting section is equipped with gutter.
Further, the concrete strength sprayed on the expanded metal lath is more than C20, the coagulation sprayed on the expanded metal lath
Soil thickness is more than 80mm.
Further, clear distance is 300mm between the stake per gang drill hole pouring pile.
Another object of the present invention is to provide the construction method of the supporting construction of above-mentioned ultra-deep piping lane foundation pit, including it is following
Step：
Step 1：Depth and soil property situation is required to confirm sloping timbering section depth and cast-in-place concrete pile branch according to foundation pit
Protect section depth；
Step 2：The earthwork of slope retaining section layering is dug out using machinery, in slope retaining section shape successively from top to bottom
At level-one side slope, two the first riding tracks, two level side slope and two the second riding tracks；
Step 3：It is laid with the first steel plate on the part ground of level-one side slope, the first riding track, two level side slope and margin of foundation pit
Net；
Step 4：It is embedded in the first soil nailing at the part ground of margin of foundation pit and the first riding track, is embedded at level-one side slope
Second soil nailing is embedded in soil bolt at two level side slope；
Step 5：Drain hole, the gunite concrete on the first expanded metal lath are installed at level-one side slope and two level side slope；
Step 6：It is constructed respectively two rows of drill-pourings on cast-in-place concrete pile supporting section both sides using pile foundation construction machinery
Stake；
Step 7：After cast-in-situ bored pile intensity reaches design requirement, Guan Liang is distinguished at the top of two rows of cast-in-situ bored piles,
The construction steel support between two Guan Liangs；
Step 8：The earthwork of cast-in-place concrete pile supporting section is dug out using machinery, and in cast-in-place concrete pile supporting
Dig out gutter in the bottom of section；
Step 9：The second expanded metal lath is fixed in suspension between the stake of two rows of cast-in-situ bored piles respectively, and the second expanded metal lath has been fixed
Cheng Hou, the gunite concrete on the second expanded metal lath.
The present invention is compared with traditional pattern foundation pit supporting structure：If when single use slope retaining, the safety of foundation pit is guaranteed,
But earthwork excavated volume, heavy workload increase the construction period；If when single use cast-in-situ bored pile supporting, although the earthwork is opened
Digging amount is few, but the safety of foundation pit cannot be guaranteed；However the present invention is combined slope retaining with cast-in-situ bored pile supporting, is being protected
While demonstrate,proving ultra-deep foundation pit safety, ultra-deep foundation pit earthwork excavated volume is reduced, do mechanization operation efficiency improves, and operability is strong,
Compared to single support pattern, ultra-deep foundation pit support cost is reduced, significantly shortens the construction period.
Description of the drawings
The schematic diagram of the supporting construction of Fig. 1 ultra-deep piping lane foundation pits of the present invention.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can be more clear
The understanding of Chu, as shown in Figure 1, the supporting construction of ultra-deep piping lane foundation pit of the present invention includes：The supporting construction is from top to bottom
It is divided into sloping timbering section and cast-in-place concrete pile supporting section.
The sloping timbering section excavates downwards the earthwork by ground 1, sequentially forms level-one side slope 2, two first from top to bottom
Riding track 3, two level side slope 4 and two the second riding tracks 5；The top of the slope of the level-one side slope 2 is connect with ground 1, first riding track 3
Edge is separately connected the top of the slope of the bottom of slope and two level side slope 4 of level-one side slope 2, and the bottom of slope of the two level side slope 4 connects the second riding track 5
Outer ledge；The level-one side slope 2, the first riding track 3, two level side slope 4 and margin of foundation pit part ground 1 be laid with one layer the
One expanded metal lath 9；Several horizontal drain holes 7 are preset in level-one side slope 2 and two level side slope 4, the drain hole 7 passes through the first steel plate
Net 9 is embedded in soil layer；A layer concrete is sprayed on first expanded metal lath 9.The part ground 1 of the margin of foundation pit and the first horse
The first soil nailing 6 is equipped at road 3, first soil nailing 6 passes through the first expanded metal lath 9 embedded soil layer vertically.It is set at the level-one side slope 2
There are the second soil nailing 8, second soil nailing 8 that 9 vertical slope surface of the first expanded metal lath is passed through to be embedded in soil layer.It is equipped at the two level side slope 4
Soil bolt 10, the soil bolt 10 pass through 9 vertical slope surface of the first expanded metal lath to be embedded in soil layer.
The cast-in-place concrete pile supporting section is excavated the earthwork by 5 inside edge of the second riding track and is formed straight down；It is described mixed
The both sides of solidifying soil bored concrete pile supporting section are equidistantly positioned two rows of vertical cast-in-situ bored piles 11；The two rows cast-in-situ bored pile 11
Top is longitudinal respectively to be equipped with horizontal Guan Liang 12, and horizontal bracing members 14 are equipped between described two longitudinal Guan Liangs 12；Described two
Suspension is fixed with the second expanded metal lath 13 between the stake of gang drill hole pouring pile 11, sprays a layer concrete on second expanded metal lath 13.
The bottom of the cast-in-place concrete pile supporting section is equipped with gutter 15.
The concrete strength sprayed on the expanded metal lath is more than C20, and the concrete thickness sprayed on the expanded metal lath is more than
80mm.Clear distance is 300mm between the stake of the cast-in-situ bored pile 11.
The construction method of the supporting construction of above-mentioned ultra-deep piping lane foundation pit, includes the following steps：
Step 1：Depth and soil property situation is required to confirm sloping timbering section depth and cast-in-place concrete pile branch according to foundation pit
Protect section depth；
Step 2：The earthwork of slope retaining section layering is dug out using machinery, in slope retaining section shape successively from top to bottom
At 2, two the first riding tracks 3 of level-one side slope, two level side slope 4 and two the second riding tracks 5；
Step 3：It is laid with first on the part ground 1 of level-one side slope 2, the first riding track 3, two level side slope 4 and margin of foundation pit
Expanded metal lath 9；
Step 4：The first soil nailing 6 is embedded at the part ground 1 of margin of foundation pit and the first riding track 3, at level-one side slope 2
Embedded second soil nailing 8, is embedded in soil bolt 10 at two level side slope 4；
Step 5：Drain hole 7, the gunite concrete on the first expanded metal lath 9 are installed at level-one side slope 2 and two level side slope 4；
Step 6：It is constructed respectively two rows of cast-in-situ bored piles on cast-in-place concrete pile supporting section both sides using pile foundation construction machinery
11；
Step 7：After 11 intensity of cast-in-situ bored pile reaches design requirement, distinguish at the top of two rows of cast-in-situ bored piles 11
Guan Liang 12, the construction steel support 14 between two Guan Liangs 12；
Step 8：The earthwork of cast-in-place concrete pile supporting section is dug out using machinery, and in cast-in-place concrete pile supporting
Dig out gutter 15 in the bottom of section；
Step 9：The second expanded metal lath 13, the second expanded metal lath 13 are fixed in suspension between the stake of two rows of cast-in-situ bored piles 11 respectively
After the completion of fixation, the gunite concrete on the second expanded metal lath 13.
Claims (10)
1. a kind of supporting construction of ultra-deep piping lane foundation pit, it is characterised in that：The supporting construction is divided into sloping timbering from top to bottom
Section and cast-in-place concrete pile supporting section.
2. the supporting construction of ultra-deep piping lane foundation pit according to claim 1, it is characterised in that：The sloping timbering section is by ground
(1) earthwork is excavated downwards, sequentially forms level-one side slope (2), two the first riding tracks (3), two level side slope (4) and two from top to bottom
Second riding track (5)；The top of the slope of the level-one side slope (2) is connect with ground (1), and the edge of first riding track (3) is separately connected
The bottom of slope of the top of the slope of the bottom of slope and two level side slope (4) of level-one side slope (2), the two level side slope (4) connects the outer of the second riding track (5)
Lateral edges；Part ground (1) laying one of the level-one side slope (2), the first riding track (3), two level side slope (4) and margin of foundation pit
The first expanded metal lath of layer (9)；Several horizontal drain holes (7), the drain hole are preset in level-one side slope (2) and two level side slope (4)
(7) the first expanded metal lath (9) is passed through to be embedded in soil layer；A layer concrete is sprayed on first expanded metal lath (9).
3. the supporting construction of ultra-deep piping lane foundation pit according to claim 2, it is characterised in that：The margin of foundation pit is partly
The first soil nailing (6) is equipped at face (1) and the first riding track (3), first soil nailing (6) passes through the first expanded metal lath (9) vertical embedding
Underground layer.
4. the supporting construction of ultra-deep piping lane foundation pit according to claim 2, it is characterised in that：It is set at the level-one side slope (2)
There are the second soil nailing (8), second soil nailing (8) that the vertical slope surface of the first expanded metal lath (9) is passed through to be embedded in soil layer.
5. the supporting construction of ultra-deep piping lane foundation pit according to claim 2, it is characterised in that：It is set at the two level side slope (4)
There are soil bolt (10), the soil bolt (10) that the vertical slope surface of the first expanded metal lath (9) is passed through to be embedded in soil layer.
6. the supporting construction of ultra-deep piping lane foundation pit according to claim 1, it is characterised in that：The cast-in-place concrete pile supporting
Section is excavated the earthwork by the second riding track (5) inside edge and is formed straight down；The both sides of the cast-in-place concrete pile supporting section are equidistant
From the two rows of vertical cast-in-situ bored piles (11) of setting；The top of the two rows cast-in-situ bored pile (11) is longitudinal equipped with horizontal respectively
Guan Liang (12) is equipped with horizontal bracing members (14) between two longitudinal Guan Liangs (12)；The two rows cast-in-situ bored pile (11)
Stake between suspension be fixed with the second expanded metal lath (13), spray a layer concrete on second expanded metal lath (13).
7. the supporting construction of ultra-deep piping lane foundation pit according to claim 6, it is characterised in that：The cast-in-place concrete pile supporting
The bottom of section is equipped with gutter (15).
8. according to the supporting construction of the ultra-deep piping lane foundation pit of claim 2 or 6, it is characterised in that：It is sprayed on the expanded metal lath
Concrete strength be more than C20, the concrete thickness sprayed on the expanded metal lath is more than 80mm.
9. the supporting construction of ultra-deep piping lane foundation pit according to claim 6, it is characterised in that：Every gang drill hole pouring pile
(11) clear distance is 300mm between stake.
10. a kind of construction method of the supporting construction of ultra-deep piping lane foundation pit as described in claim 1-9, which is characterized in that packet
Include following steps：
Step 1：Depth and soil property situation is required to confirm sloping timbering section depth and cast-in-place concrete pile supporting section according to foundation pit
Depth；
Step 2：The earthwork layering of slope retaining section is dug out using machinery, one is sequentially formed from top to bottom in slope retaining section
Grade side slope (2), two the first riding tracks (3), two level side slope (4) and two the second riding tracks (5)；
Step 3：It is laid on the part ground (1) of level-one side slope (2), the first riding track (3), two level side slope (4) and margin of foundation pit
First expanded metal lath (9)；
Step 4：The first soil nailing (6) is embedded at the part ground (1) of margin of foundation pit and the first riding track (3), in level-one side slope
(2) it is embedded in the second soil nailing (8) at, soil bolt (10) is embedded at two level side slope (4)；
Step 5：Drain hole (7) is installed at level-one side slope (2) and two level side slope (4), is sprayed on the first expanded metal lath (9) mixed
Solidifying soil；
Step 6：It is constructed respectively two rows of cast-in-situ bored piles on cast-in-place concrete pile supporting section both sides using pile foundation construction machinery
(11)；
Step 7：After cast-in-situ bored pile (11) intensity reaches design requirement, distinguish at the top of two rows of cast-in-situ bored piles (11)
Guan Liang (12), the construction steel support (14) between two Guan Liangs (12)；
Step 8：The earthwork of cast-in-place concrete pile supporting section is dug out using machinery, and in cast-in-place concrete pile supporting section
Dig out gutter (15) in bottom；
Step 9：The second expanded metal lath (13), the second expanded metal lath are fixed in suspension between the stake of two rows of cast-in-situ bored piles (11) respectively
(13) after the completion of fixed, the gunite concrete on the second expanded metal lath (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810349159.2A CN108643191A (en) | 2018-04-18 | 2018-04-18 | A kind of supporting construction and its construction method of ultra-deep piping lane foundation pit |
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| CN201810349159.2A CN108643191A (en) | 2018-04-18 | 2018-04-18 | A kind of supporting construction and its construction method of ultra-deep piping lane foundation pit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881707A (en) * | 2019-03-20 | 2019-06-14 | 中国十七冶集团有限公司 | A kind of assembled piping lane foundation pit structure and its construction method |
| CN110761300A (en) * | 2019-11-08 | 2020-02-07 | 中国十七冶集团有限公司 | Construction method for supporting impervious soft soil body on side slope of deep foundation pit of high-rise building through micro-expansion |
| CN112281862A (en) * | 2020-10-13 | 2021-01-29 | 中国建筑第八工程局有限公司 | Deep foundation pit large-gradient inverted hanging type steel anchor-shotcrete supporting structure and construction method thereof |
| CN113802572A (en) * | 2021-09-18 | 2021-12-17 | 重庆交通大学 | Structure for controlling deformation of foundation pit and construction method |
| CN114032911A (en) * | 2021-12-24 | 2022-02-11 | 中国化学工程第十一建设有限公司 | Construction method for deep foundation pit in sea reclamation area |
| CN114319389A (en) * | 2021-12-21 | 2022-04-12 | 中铁建设集团(杭州)建设有限公司 | Construction method for urban comprehensive pipe gallery foundation pit support |
| CN115710910A (en) * | 2022-12-01 | 2023-02-24 | 中建八局第二建设有限公司 | Groove-bin high-slope deep foundation pit supporting method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881707A (en) * | 2019-03-20 | 2019-06-14 | 中国十七冶集团有限公司 | A kind of assembled piping lane foundation pit structure and its construction method |
| CN110761300A (en) * | 2019-11-08 | 2020-02-07 | 中国十七冶集团有限公司 | Construction method for supporting impervious soft soil body on side slope of deep foundation pit of high-rise building through micro-expansion |
| CN110761300B (en) * | 2019-11-08 | 2021-04-09 | 中国十七冶集团有限公司 | Construction method for supporting impervious soft soil body on side slope of deep foundation pit of high-rise building through micro-expansion |
| CN112281862A (en) * | 2020-10-13 | 2021-01-29 | 中国建筑第八工程局有限公司 | Deep foundation pit large-gradient inverted hanging type steel anchor-shotcrete supporting structure and construction method thereof |
| CN112281862B (en) * | 2020-10-13 | 2022-06-28 | 中国建筑第八工程局有限公司 | Deep foundation pit large-gradient inverted hanging type steel anchor-shotcreting supporting structure and construction method thereof |
| CN113802572A (en) * | 2021-09-18 | 2021-12-17 | 重庆交通大学 | Structure for controlling deformation of foundation pit and construction method |
| CN114319389A (en) * | 2021-12-21 | 2022-04-12 | 中铁建设集团(杭州)建设有限公司 | Construction method for urban comprehensive pipe gallery foundation pit support |
| CN114032911A (en) * | 2021-12-24 | 2022-02-11 | 中国化学工程第十一建设有限公司 | Construction method for deep foundation pit in sea reclamation area |
| CN115710910A (en) * | 2022-12-01 | 2023-02-24 | 中建八局第二建设有限公司 | Groove-bin high-slope deep foundation pit supporting method |
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