CN110055972A - Dry dock foundation ditch construction method and dry dock foundation pit structure - Google Patents
Dry dock foundation ditch construction method and dry dock foundation pit structure Download PDFInfo
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- CN110055972A CN110055972A CN201910348638.7A CN201910348638A CN110055972A CN 110055972 A CN110055972 A CN 110055972A CN 201910348638 A CN201910348638 A CN 201910348638A CN 110055972 A CN110055972 A CN 110055972A
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- foundation pit
- slope
- ponding
- cut
- dry dock
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000005488 sandblasting Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- 241000209202 Bromus secalinus Species 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 6
- 239000002352 surface water Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/22—Lining sumps in trenches or other foundation pits
Abstract
The invention discloses a kind of dry dock foundation ditch construction methods, comprising: cut-pff wall A, is built except foundation pit construction region, cut-pff wall surrounds foundation pit construction region, and the bottom of cut-pff wall reaches impermeable stratum；The drainage trenching in the earth's surface except cut-pff wall；Multiple vertical dewatering wells are dug between cut-pff wall and foundation pit construction region；Excavation of foundation pit；It is laid with drainage pad layer at Foundation Pit bottom, drainpipe is installed in drainage pad layer, then in the upper surface casting concrete layer of drainage pad layer.Also disclosing can be using the dry dock foundation pit structure of above method construction.The present invention can prevent rainwater, underground water, surface water etc. from entering foundation pit and generate ponding, carry out construction continuously normally, be conducive to improve construction efficiency, guarantee construction quality.
Description
Technical field
The present invention relates to dry dock technical field of construction, and in particular to a kind of dry dock foundation ditch construction method and dry dock base
Cheat structure.
Background technique
Dry dock is suitable for the closed basin that ship water outlet is checked, repaired.Dry dock is typically set up by the sea, underground
Water, rainwater are abundant, when carrying out foundation pit construction to dry dock, the case where foundation pit intakes and generates ponding, ponding leaching often occur
It steeps oneself-meeting and adverse effect is caused to foundation pit, reduce the construction quality of foundation pit；When foundation pit water inlet, suction pump is usually used and takes out ponding
Out, foundation pit construction progress is influenced.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of dry dock foundation ditch construction method of good waterproof performance and dry ships
Depressed place foundation pit structure improves the quality of foundation pit construction.
The technical proposal for solving the technical problem of the invention is: dry dock foundation ditch construction method, comprising the following steps:
A, cut-pff wall is built except foundation pit construction region, cut-pff wall surrounds foundation pit construction region, and the bottom of cut-pff wall is arrived
Up to impermeable stratum；
B, the drainage trenching in the earth's surface except cut-pff wall；
C, multiple vertical dewatering wells are dug between cut-pff wall and foundation pit construction region；
D, the side slope of excavation of foundation pit, foundation pit is Slope with multi-step, and Slope with multi-step includes multiple inclined slopes, and adjacent two inclined slope is logical
It crosses horizontal slope platform to be connected, after often digging out a slope platform, ponding ditch is dug on the slope platform of inclined slope bottom；
E, it is laid with drainage pad layer at Foundation Pit bottom, drainpipe is installed in drainage pad layer, then in drainage pad layer
Upper surface casting concrete layer.
Further, in step D, on each slope platform, a ponding well, ponding ditch and product are dug every 30m-40m
Well connection；The ponding well depth of lower layer's slope platform is greater than the ponding well depth of upper layer slope platform.
Further, it is reinforced using the borehole wall of the plank to ponding well, spreads metalling in the bottom of ponding well.
Further, in step D, in the side wall and bottom applying mortar or laying plank of each ponding ditch.
Further, in step C, the internal diameter of each dewatering well is greater than or equal to 600mm, adjacent two dewatering well center away from
It is located at below bottom of foundation ditch at 6m under from the bottom less than or equal to 25m, dewatering well.
Further, in step D, in inclined slope and slope platform upper berth steel wire and sandblasting slurry.
Further, in step D, when digging using machinery to away from bottom of foundation ditch absolute altitude 300mm, clear bottom, clear bottom are manually carried out
The sandy soil of generation are transported by trolley.
Dry dock foundation pit structure, including gutter, cut-pff wall and the foundation pit ontology set gradually from outside to inside, the antiseepage
Multiple vertical dewatering wells are provided between wall and foundation pit ontology, the side slope of the foundation pit ontology includes multiple inclined slopes, adjacent
It is connected between two inclined slopes by horizontal slope platform, is provided with ponding ditch on the slope platform of the inclined slope bottom；Institute
The bottom for stating foundation pit ontology is equipped with drainage pad layer, is provided with multiple drainpipes in drainage pad layer, drainage pad layer it is upper
Surface is provided with concrete layer.
Further, multiple ponding wells are provided on each slope platform, the distance between adjacent two ponding well is 30m-
40m, ponding ditch are connected to ponding well；The ponding well depth of lower layer's slope platform is greater than the ponding well depth of upper layer slope platform.
Further, the gradient of the inclined slope is 0.5.
Compared with prior art, the beneficial effects of the present invention are: the present invention is by building cut-pff wall, drainage trenching, digging drop
Well digs the measures such as ponding ditch, it is ensured that during foundation pit construction, prevents rainwater, underground water, surface water etc. from entering foundation pit and produces
Raw ponding, carries out construction continuously normally, is conducive to improve construction efficiency, guarantees construction quality.
Detailed description of the invention
Fig. 1 is the whole schematic top plan view of dry dock foundation pit structure of the present invention；
Fig. 2 is the enlarged diagram of part A in Fig. 1；
Fig. 3 is the schematic cross-sectional view of dry dock foundation pit structure of the present invention；
Fig. 4 is the enlarged diagram of part B in Fig. 3；
Fig. 5 is the enlarged diagram of C portion in Fig. 3；
Appended drawing reference: 1-cut-pff wall；2-gutters；3-inclined slopes；4-slope platforms；5-ponding ditches；6-precipitation
Well；7-drainage pad layers；8-drainpipes；9-concrete layers；10-ponding wells；20-foundation pit ontologies.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Dry dock foundation ditch construction method of the invention, comprising the following steps:
A, cut-pff wall 1 is built except foundation pit construction region, cut-pff wall 1 surrounds foundation pit construction region, the bottom of cut-pff wall 1
Reach impermeable stratum.The position that cut-pff wall 1 is determined according to foundation pit construction region keeps cut-pff wall 1 moderate to the distance of margin of foundation pit.
This cut-pff wall 1 uses wallboard type concrete continuous wall, grabs the soil body using hydraulic grab bucket grooving machine, while injecting mud and carrying out slot
Holes protecting wall, wait dig to projected depth, into slot, concrete perfusion is at wall.The bottom of cut-pff wall 1 reaches impermeable stratum, guarantees outer
Water in portion stratum penetrates into inside cut-pff wall 1 from 1 bottom of cut-pff wall, to improve waterproof effect.
B, the drainage trenching 2 in the earth's surface except cut-pff wall 1.Gutter 2 can also be dug multiple apart from cut-pff wall 1m or so
Plash makes the water energy in gutter 2 enough flow into plash, and when raining causes earth's surface water flow occur, water flow flows into gutter
2, so that the water of earth's surface be avoided to flow into inside foundation pit.
C, multiple vertical dewatering wells 6 are dug between cut-pff wall 1 and foundation pit construction region.Due to adjoining seashore, water penetration
Coefficient is larger, therefore, carries out precipitation using dewatering well 6, after the water around foundation pit construction region in soil layer penetrates into dewatering well 6, edge
Dewatering well 6 flow downward, to reduce the water content in soil.Specifically, the internal diameter of each dewatering well 6 is greater than or equal to
600mm, the distance at adjacent two dewatering wells, 6 center are less than or equal to 25m, and the bottom of dewatering well 6 is located at below bottom of foundation ditch at 6m
Hereinafter, guaranteeing preferable dewatering effect.Chimney filter of the bottom setting length not less than 5m and length of dewatering well 6 are not less than 1m's
Sediment tube.Dewatering well 6 continues precipitation in Excavation Process, and the water surface in dewatering well 6 should be lower than Foundation Pit bottom absolute altitude 500mm
More than.
D, excavation of foundation pit.Utilize excavating machinery shoveling muck haulage.The side slope of foundation pit is Slope with multi-step, and Slope with multi-step includes multiple
Inclined slope 3, adjacent two inclined slope 3 are connected by horizontal slope platform 4, and the quantity of inclined slope 3 is specially 5 grades, the top
Inclined slope 3 is connected with earth's surface, and the inclined slope 3 of bottom is connected with bottom of foundation ditch.It is Slope with multi-step by Slope Design, reduces side slope
The gradient, the risk of slope failure can be reduced.After every construction for completing an inclined slope 3 or slope platform 4, in inclined slope 3 or
4 upper berth steel wire of slope platform, then sandblasting is starched, and prevents side slope sand grains wind-engaging, rainwater and mechanical oscillation effect from generating stream erosion existing
As playing the role of slope protection, preventing slope failure, landslide.
When raining heavily, rainwater may flow on slope platform 4 along inclined slope 3, and ponding is then formed in foundation pit,
The construction quality of construction speed and foundation pit is influenced, therefore, after often digging out a slope platform 4, the slope in 3 bottom of inclined slope is flat
Ponding ditch 5 is dug on platform 4,5 depth of ponding ditch is 500mm, width 500mm, when rainwater is flowed down from inclined slope 3, can enter ponding
Ditch 5 will not generate ponding in foundation pit, it is ensured that construction is normally carried out.
In order to increase reservoir storage, on each slope platform 4, every 30m-40m dig a ponding well 10, ponding ditch 5 with
Ponding well 10 is connected to, and 10 oral area of ponding well is the square of 800mm*800mm, and depth is greater than 500mm, and lower layer's slope platform 4
10 depth of ponding well be greater than upper layer slope platform 4 10 depth of ponding well.In order to guarantee that the water energy in ponding ditch 5 enough flows into product
Well 10 can set inclined-plane for the bottom surface of ponding ditch 5.
The side wall and bottom wall of current scour ponding ditch 5 and ponding well 10 in order to prevent, the side wall of each ponding ditch 5 and bottom
Portion's applying mortar is laid with plank, is reinforced using the borehole wall of the plank to ponding well 10, and in the bottom of ponding well 10, paving is broken
Rock layers.The side wall and bottom wall for playing the role of protecting ponding ditch 5 and ponding well 10, avoid water flow from directly washing away 5 He of ponding ditch
The side wall and bottom wall of ponding well 10 prevent the side wall of ponding ditch 5 and ponding well 10 from being washed away, avoid ponding ditch 5 and ponding well
10 bottom wall is rushed out hole.
The machinery wieght digged pit is big, and when operation generates biggish vibration, may make into disturbance with local methods to ground, because
This, digs foundation pit first with machinery, and when machinery is dug to away from bottom of foundation ditch absolute altitude 300mm, using clear bottom is manually carried out, clear bottom is used
Spade soil, the sandy soil that clear bottom generates are transported by trolley, can avoid mechanical damage substrate undisturbed soil and phenomenon of backbreaking occur.
E, after the completion of excavation of foundation pit, it is laid with drainage pad layer 7 at Foundation Pit bottom as quickly as possible, bottom of foundation ditch is avoided to be grown
Time is exposed to the sun or rainwater impregnates and influences bearing capacity.Drainpipe 8 is installed, drainpipe 8 is embedded in drainage pad in drainage pad layer 7
In layer 7, then in the upper surface casting concrete layer 9 of drainage pad layer 7.
In above-mentioned work progress, due to having built cut-pff wall 1, while gutter 2, dewatering well 6,5 and of ponding ditch have been dug
Ponding well 10 can obstruct and drain the water outside foundation pit, while reduce the rainwater for flowing into bottom of foundation ditch, play good anti-
Water, drainage avoid in the construction process, large-scale ponding occur inside foundation pit and influence construction speed and construction quality
The case where.
The dry dock foundation pit structure that above-mentioned construction method is constructed can be used, as shown in Figure 1, Figure 2, Fig. 3, Fig. 4 and Fig. 5 institute
Show, including gutter 2, cut-pff wall 1 and the foundation pit ontology 20 set gradually from outside to inside, the cut-pff wall 1 and foundation pit ontology 20
Between be provided with multiple vertical dewatering wells 6, the side slope of the foundation pit ontology 20 includes multiple inclined slopes 3, adjacent two inclined slope 3
Between by horizontal slope platform 4 be connected, be provided with ponding ditch 5 on the slope platform 4 of 3 bottom of inclined slope；The base
The bottom of hole ontology 20 is equipped with drainage pad layer 7, and multiple drainpipes 8 are provided in drainage pad layer 7, drainage pad layer 7
Upper surface is provided with concrete layer 9.
Gutter 2 and cut-pff wall 1 are closed ring-type, surround foundation pit ontology 20, play good blocking water, draining effect
Fruit.The bottom of cut-pff wall 1 reaches impermeable stratum, guarantees that the water in external stratum penetrates into inside cut-pff wall 1 from 1 bottom of cut-pff wall,
To improve waterproof effect.Gutter 2 can also dig multiple plashes apart from cut-pff wall 1m or so, make the water energy in gutter 2
Plash is enough flowed into, when raining causes earth's surface water flow occur, water flow flows into gutter 2, so that the water of earth's surface be avoided to flow into base
Hole is internal.
Drainage pad layer 7 and drainpipe 8 are used to that the water below bottom of foundation ditch in soil to be discharged, and prevent concrete layer 9 from seeping water.
After water around foundation pit construction region in soil layer penetrates into dewatering well 6, flow downward along dewatering well 6, to reduce
Water content in soil.Specifically, the internal diameter of each dewatering well 6 be greater than or equal to 600mm, adjacent two dewatering wells, 6 center away from
It is located at below bottom of foundation ditch at 6m from the bottom less than or equal to 25m, dewatering well 6 hereinafter, guaranteeing preferable dewatering effect.Precipitation
Chimney filter of the bottom setting length not less than 5m and length of well 6 are not less than the sediment tube of 1m.Dewatering well 6 is in Excavation Process
In continue precipitation, the water surface in dewatering well 6 should be lower than Foundation Pit bottom absolute altitude 500mm or more.
The gradient of inclined slope 3 determines, it is preferred that inclined slope 3 of the present invention between 0.35 to 0.7 according to geological conditions
The gradient is 0.5.
Claims (10)
1. dry dock foundation ditch construction method, which comprises the following steps:
A, cut-pff wall (1) is built except foundation pit construction region, cut-pff wall (1) surrounds foundation pit construction region, the bottom of cut-pff wall (1)
Portion reaches impermeable stratum；
B, the drainage trenching (2) in the earth's surface except cut-pff wall (1)；
C, multiple vertical dewatering wells (6) are dug between cut-pff wall (1) and foundation pit construction region；
D, the side slope of excavation of foundation pit, foundation pit is Slope with multi-step, and Slope with multi-step includes multiple inclined slopes (3), adjacent two inclined slope (3)
It is connected by horizontal slope platform (4), the slope platform after often digging out a slope platform (4), in inclined slope (3) bottom
(4) ponding ditch (5) are dug on；
E, drainage pad layer (7) are laid at Foundation Pit bottom, drainpipe (8) are installed in drainage pad layer (7), then in drainage pad
The upper surface casting concrete layer (9) of layer (7).
2. dry dock foundation ditch construction method according to claim 1, which is characterized in that in step D, in each slope platform
(4) on, a ponding well (10) is dug every 30m-40m, ponding ditch (5) is connected to ponding well (10)；Lower layer's slope platform (4)
Ponding well (10) depth is greater than ponding well (10) depth of upper layer slope platform (4).
3. dry dock foundation ditch construction method according to claim 2, which is characterized in that using plank to ponding well (10)
The borehole wall is reinforced, and spreads metalling in the bottom of ponding well (10).
4. dry dock foundation ditch construction method according to claim 1, which is characterized in that in step D, in each ponding ditch
(5) side wall and bottom applying mortar or laying plank.
5. dry dock foundation ditch construction method according to claim 1, which is characterized in that in step C, each dewatering well (6)
Internal diameter be greater than or equal to 600mm, the distance at adjacent two dewatering well (6) center is less than or equal to 25m, the bottom of dewatering well (6)
At 6m below bottom of foundation ditch under.
6. dry dock foundation ditch construction method according to claim 1, which is characterized in that in step D, in inclined slope (3) and
Slope platform (4) upper berth steel wire and sandblasting slurry.
7. dry dock foundation ditch construction method according to claim 1, which is characterized in that in step D, using machinery dig to away from
When bottom of foundation ditch absolute altitude 300mm, clear bottom is manually carried out, the sandy soil that clear bottom generates are transported by trolley.
8. dry dock foundation pit structure, which is characterized in that including gutter (2), cut-pff wall (1) and the base set gradually from outside to inside
It cheats ontology (20), multiple vertical dewatering wells (6), the foundation pit is provided between the cut-pff wall (1) and foundation pit ontology (20)
The side slope of ontology (20) includes multiple inclined slopes (3), is connected between adjacent two inclined slope (3) by horizontal slope platform (4),
Ponding ditch (5) are provided on the slope platform (4) of inclined slope (3) bottom；The bottom of the foundation pit ontology (20) is equipped with
Drainage pad layer (7) is provided with multiple drainpipes (8) in drainage pad layer (7), and the upper surface of drainage pad layer (7) is provided with
Concrete layer (9).
9. dry dock foundation pit structure according to claim 8, which is characterized in that be provided on each slope platform (4) more
A ponding well (10), the distance between adjacent two ponding well (10) are 30m-40m, and ponding ditch (5) is connected to ponding well (10)；Under
Ponding well (10) depth of layer slope platform (4) is greater than ponding well (10) depth of upper layer slope platform (4).
10. dry dock foundation pit structure according to claim 8, which is characterized in that the gradient of the inclined slope (3) is 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348638.7A CN110055972A (en) | 2019-04-28 | 2019-04-28 | Dry dock foundation ditch construction method and dry dock foundation pit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348638.7A CN110055972A (en) | 2019-04-28 | 2019-04-28 | Dry dock foundation ditch construction method and dry dock foundation pit structure |
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| CN110055972A true CN110055972A (en) | 2019-07-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685292A (en) * | 2019-09-25 | 2020-01-14 | 广东乾兴建设工程有限公司 | Foundation pit drainage system and construction method thereof |
| CN111364466A (en) * | 2020-03-20 | 2020-07-03 | 中交第三航务工程局有限公司 | Construction method of dry dock bottom plate |
| CN112627311A (en) * | 2020-12-11 | 2021-04-09 | 上海宝冶集团有限公司 | Drainage method for building construction in mountainous region with large precipitation |
| CN113106926A (en) * | 2021-05-12 | 2021-07-13 | 中国二十二冶集团有限公司 | Construction method for foundation backfill of blown-fill sand reclamation foundation in coastal region |
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| CN112627311A (en) * | 2020-12-11 | 2021-04-09 | 上海宝冶集团有限公司 | Drainage method for building construction in mountainous region with large precipitation |
| CN113106926A (en) * | 2021-05-12 | 2021-07-13 | 中国二十二冶集团有限公司 | Construction method for foundation backfill of blown-fill sand reclamation foundation in coastal region |
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