CN107100171A - A kind of foundation ditch construction method - Google Patents
A kind of foundation ditch construction method Download PDFInfo
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- CN107100171A CN107100171A CN201710356823.1A CN201710356823A CN107100171A CN 107100171 A CN107100171 A CN 107100171A CN 201710356823 A CN201710356823 A CN 201710356823A CN 107100171 A CN107100171 A CN 107100171A
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- foundation ditch
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- excavation
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Classifications
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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
-
- 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)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
A kind of foundation ditch construction method, belongs to construction engineering technical field, applied to the foundation pit construction in construction.A kind of foundation ditch construction method of the present invention, the steps such as the determination including foundation ditch profile, excavation region division, layer and section excavation, Slope Treatment, hand excavation and foundation ditch backfill, a kind of new foundation pit construction technology is provided, using different foundation pit enclosure structure solve construction soil property during existing excavation pit it is soft caused by collapse problem, shorten construction period, improve construction quality, and construction quality is monitored by wireless pressure inductor, the quality problems occurred in building construction process can in time be notified to safeguard unit.
Description
Technical field
The invention belongs to construction engineering technical field, a kind of foundation ditch construction method is concretely related to.
Background technology
Excavation plan, with reference to live nearby buildings situation, should be determined, and make according to geology hydrological data before excavation of foundation pit
Good water-proof drainage work.The available method for putting side slope of not deep person is excavated, makes Stability of Earth Slopes, its gradient size presses relevant construction journey rule
It is fixed to determine.The relatively deep and neighbouring person that has building is excavated, foundation pit walls method for protecting support, gunite concrete wall protecting method, large-scale base can be used
Hole even using diaphram wall and the method such as colonnade formula cast-in-situ bored pile is chain, protection outside soil layer collapse into；Nearby build
Without influencer, well-point method lowering of watertable can be used, using slope open cut etc..
In recent years, more and more deeper with the excavation of foundation ditch, area is increasing, and large deep foundation pit Construction on Environment was deformed
The control of journey becomes more and more difficult：(1) disposable excavate influences larger to surrounding enviroment, and huge soil excavation is unloaded in construction
Carry, the resilience of the bottom of foundation ditch soil body will be inevitable to the adverse effect of surrounding formations；(2) in Excavation Process, excavation is worked as
When ground elevation is less than the foundation ditch of level of ground water, underground water can be constantly penetrated into hole, frequently encounter construction soil property soft caused
Cave in problem, cause low construction efficiency, construction quality is uncontrollable.
For this reason, it is necessary to develop a kind of new foundation pit construction technology.
The content of the invention
It is above-mentioned of the prior art not enough there is provided a kind of foundation ditch construction method it is an object of the invention to overcome, solve existing
Have during excavation pit construction soil property it is soft caused by collapse problem, shorten construction period, improve construction quality, and pass through nothing
Line pressure sensor monitors construction quality, can notify the quality problems occurred in building construction process in time to safeguard unit.
To achieve the above object, the present invention uses following technical scheme：
A kind of foundation ditch construction method, its feature is：Comprise the following steps：
The first step, determines profile：The barrier in boundary of works area is removed, excavation side is marked with lime according to design drawing
Line, determines foundation ditch profile；
Second step, region division：Foundation ditch is divided into central area and neighboring area, central area and neighboring area are adopted
Excavated with different modes；
3rd step, excavation section by section：By central area, layer and section is excavated from top to bottom, and neighboring area coordinates building enclosure point
Layer is excavated, and every layer of cutting depth is between 1.5~2.0m；
4th step, Slope Treatment：Successively central excavation region, forms side slope, carries out brush slope, finishing Slope Treatment, repairing
Side slope after whole places wireless pressure sensor, and is gone along with sb. to guard him immediately using pit maintenance soil structure, and intensity to be designed reaches 70
~80%, carry out the excavation of next layer of soil layer；
5th step, hand excavation：During apart from substrate 20~30cm of designed elevation, the earthwork uses hand excavation, and the place of backbreaking is adopted
Designed elevation is filled to gravel, final cut the earth to the bottom designed elevation of hole carries out concrete cushion construction in time, closing hole bottom；
6th step, foundation ditch backfill：Backfill horizontal slice to carry out, from most being filled out bottom slice, according to cross section into horizontal level
Successively fill upwards, often fill 2~3 layers and reappose center line and sideline, during backfill, filler next time is spread in both sides simultaneously, utilizes digging
Pick machine coordinates Manual, then smooth with bull-dozer, is rolled with road roller, completes whole work progress.
Further, foundation pit enclosure structure is directly, in side slope spray furnace surface layer, to wait after condensation again in the step 4
Squeeze into " U " sprig.
Further, foundation pit enclosure structure is that bar-mat reinforcement, expanded metal lath or low are first constructed in the scope of operation in the step 4
Carbon cold-drawn silk screen, then spray furnace surface layer, " U " sprig is squeezed into after waiting condensation again.
Further, the side slope rate of the side slope after being handled in the step 4 and domatic smooth-going are complete.
Further, the travel speed of road roller is 2~4Km/h, and final compacting factor is 0.85~0.95.
Further, foundation ditch both sides and slope top overcharge on ground≤20Kpa.
Further, the specification of described expanded metal lath is 50 × 50mm, a diameter of 3cm, and expanded metal lath is pressed using " U " sprig
1.5 × 1.5m is quincunx, and arc-welding machine is welded by hand between fixation, mesh sheet.
Further, the pressure that the wireless pressure sensor in the step 4 is born to place layer is measured, if surveying
Measure pressure value>0.4MPa, beyond place, layer bears pressure limit, sends abnormal alarm sound, and pressure value and wireless pressure are passed
The positional information of sensor is transferred to ECC engineering control center.
The present invention has advantages below compared with prior art：
(1) bar-mat reinforcement, expanded metal lath or low-carbon cold-drawn silk screen are used and combination mortar surface layer and " U " sprig are used as foundation pit enclosure
Structure avoid soil property of being constructed during foundation pit construction it is soft caused by collapse problem, shorten construction period, improve construction matter
Amount.
(2) produced problem in work progress can in time be notified to safeguard unit by wireless pressure sensor, safeguarded
Unit can take maintenance measure to be safeguarded in time.
The other features and advantages of the invention will be illustrated in the following description.
Embodiment
Technical solution of the present invention is further described with reference to embodiment.
Embodiment 1
Here is the embodiment of a specific foundation pit construction operating process：
The first step：Equipped before construction
The barriers such as underground piping, cable, optical cable, old basis in removing works scope, are then used according to design drawing
Lime marks excavating sideline, determines foundation ditch profile.
Excavation of foundation pit scene will be set forbids the larger mechanical work of vibratility in the range of warning mark, foundation ditch surrounding 5m,
Forbid to stack weight, foundation ditch both sides and slope top overcharge on ground in the range of 3m<20Kpa, it is excessive to foundation ditch side pressure to prevent ground load,
Foundation ditch side wall is caused to deform and basement high.
Second step：Excavation method
(1) excavation construction
Excavation of foundation pit coordinates supporting construction, and layer and section is carried out from top to bottom, and every layer of cutting depth is 1.5m；In machinery
Excavated in digging process with artificial follow-up, the earthwork is disposably shoveled out to mechanical equivalent of light excavation face, then with large-scale excavation as far as possible
Machinery transports soil；Hand excavation is used during the bottom designed elevation 20cm of distance hole, can so reduce and backbreak, with keeping hole subsoil
Original state structure, the place of backbreaking is filled to designed elevation using gravel；Cut the earth to the bottom designed elevation of hole, cushion construction carried out in time,
Closing hole bottom.
To prevent the exposed soil body of excavation slope from collapsing, the side slope soil body carries out finishing processing, then after conditioning
Side slope place wireless pressure sensor, and gone along with sb. to guard him immediately using foundation pit enclosure structure, enclosed structure now is using directly existing
The scope of operation sprays one layer of mortar surface layer, waits mortar surface layer to squeeze into " U " sprig again after condensing, treats " U " sprig and mortar surface layer intensity
70% is reached, the excavation of next layer of soil layer is carried out；
First starched in the present embodiment during spray furnace surface layer in excavation slope surface jet cement element, then booth sprays again
C20 plain concrete, to ensure the bonds well between gunite concrete and excavation slope, jet thickness is 100mm.
The pressure that the wireless pressure inductor placed in side slope is born to place layer is measured, measured value>During 0.4MPa,
Beyond place, layer bears pressure limit, sends abnormal alarm sound, and pressure value and the positional information of wireless pressure sensor are passed
ECC engineering control center is defeated by, ECC engineering control center formulates subsequent construction strategy according to relevant information.
(2) pumping equipment is set
Water is the problem of " U " sprig supporting construction is the most obvious, and Yield rainfall relation work is not only carried out before construction, also to be filled
Divide the processing of surface water and underground water during considering the work of " U " sprig building enclosure, drain structure measure is set, therefore in foundation ditch
The PVC drain pipe that spacing is 1.5m, which is uniformly arranged, when side wall has pervious bed or infiltration soil layer, on spray furnace surface layer does spilled water hole,
Outer spout is slightly tilted down.
3rd step：Foundation ditch is backfilled
Horizontal slice backfill is carried out after the excavation acceptance(check) of foundation ditch, from most being filled out bottom slice, according to cross section into level
Level is successively filled upwards, often fills out one layer, is filled last layer again after meeting regulation requirement through compacting, is often filled 2 layers and reappose
Center line and sideline.
During backfill, filler next time is spread in both sides simultaneously, and backfill material is free from the earth material of organic impurities；It is manually based on machinery
Auxiliary scheme, coordinates Manual using excavator, smooth with bull-dozer, is rolled with road roller, completion was entirely constructed
Journey.
When rolling, the travel speed of road roller is 2Km/h, should defer to " weight after first light, it is first slow after behind fast, first both sides in the middle of "
Principle rolled, roll overlapping ranges 40cm twice for vibrated roller is adjacent, away from the edge 50cm that bankets on the outside of muller,
Roll 5 times, final compacting factor is 0.85.
Embodiment 2
The first step：Equipped before construction
The barriers such as underground piping, cable, optical cable, old basis in removing works scope, are then used according to design drawing
Lime marks excavating sideline, determines foundation ditch profile.
Excavation of foundation pit scene will be set forbids the larger mechanical work of vibratility in the range of warning mark, foundation ditch surrounding 5m,
Forbid to stack weight in the range of 3m, foundation ditch both sides and slope top overcharge on ground are 20Kpa, to prevent ground load to foundation ditch side pressure
Greatly, foundation ditch side wall is caused to deform and basement high.
Second step：Excavation method
When carrying out excavation operation, excavation of foundation pit coordinates supporting construction, and layer and section is carried out from top to bottom, and every layer of excavation is deep
Spend for 2m；Excavate, the earthwork is disposably shoveled out as far as possible to mechanical equivalent of light excavation face, so with artificial follow-up during mechanical equivalent of light excavation
Soil is transported with large-scale excavation mechinery afterwards；Hand excavation is used during the bottom designed elevation 30cm of distance hole, can so reduce and backbreak,
The original state structure on hole subsoil ground is kept, the place of backbreaking is filled to designed elevation using gravel；Cut the earth to the bottom designed elevation of hole, enter in time
Row cushion construction, closing hole bottom.
To prevent the exposed soil body of excavation slope from collapsing, the side slope soil body carries out finishing processing, then after conditioning
Side slope place wireless pressure sensor, and side slope sets foundation pit enclosure structure immediately, and enclosed structure herein is first is making
Bar-mat reinforcement, expanded metal lath or low-carbon cold-drawn silk screen are constructed on industry face, one layer of mortar surface layer is then sprayed, waited after mortar surface layer condensation again
" U " sprig is squeezed into, treats that " U " sprig and mortar surface layer intensity reach 80%, carries out the excavation of next layer of soil layer.
First starched in the present embodiment during spray furnace surface layer in excavation slope surface jet cement element, then booth sprays again
C20 plain concrete, to ensure the bonds well between gunite concrete and excavation slope, jet thickness is 100mm.
Constructed in the present embodiment in the scope of operation using 50 × 50mm, a diameter of 3cm expanded metal lath, then expanded metal lath uses " U "
Sprig presses arc-welding machine welding by hand between the quincunx fixations of 1.5 × 1.5m, mesh sheet.
When foundation ditch side wall has pervious bed or infiltration soil layer, then artificial drill rod punching uniformly buries on the mortar surface layer of injection
If PVC drain pipe does spilled water hole, outer spout is slightly tilted down.
The pressure that the wireless pressure sensor placed in side slope is born to place layer is measured, and works as measured value>0.4MPa
When, beyond place, layer bears pressure limit, sends abnormal alarm sound, and by pressure value and the positional information of wireless pressure inductor
ECC engineering control center is transferred to, ECC engineering control center formulates subsequent construction strategy according to relevant information.
Backfilled after the excavation acceptance(check) of foundation ditch, backfill uses horizontal slice back-filling way, from most being filled out bottom slice,
Successively filled upwards into horizontal level according to cross section, often fill out one layer, fill last layer again after meeting regulation requirement through compacting, often
Center line and sideline are reapposed after filling 3 layers.
3rd step：Foundation ditch is backfilled
During backfill, filler next time is spread in both sides simultaneously, and backfill material is free from the earth material of organic impurities；It is manually based on machinery
Auxiliary scheme, coordinates Manual using excavator, smooth with bull-dozer, is rolled with road roller, completion was entirely constructed
Journey.
When rolling, the travel speed of road roller is 4Km/h, should defer to " weight after first light, it is first slow after behind fast, first both sides in the middle of "
Principle rolled, roll overlapping ranges 50cm twice for vibrated roller is adjacent, be more than on the outside of muller away from the edge that bankets
50cm, is rolled 8 times, and final compacting factor is 0.95.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.
Claims (8)
1. a kind of foundation ditch construction method, it is characterised in that：Comprise the following steps：
The first step, determines profile：Removing obstacles thing, marks excavating sideline, determines foundation ditch profile；
Second step, region division：Foundation ditch is divided into central area and neighboring area；
3rd step, excavation section by section：By central area, layer and section is excavated from top to bottom, and neighboring area coordinates building enclosure layering to open
Dig, every layer of cutting depth is between 1.5~2.0m；
4th step, Slope Treatment：Successively central excavation region, forms side slope, carries out brush slope, finishing Slope Treatment, after conditioning
Side slope place wireless pressure sensor, and gone along with sb. to guard him, intensity to be designed reaches 70~80%, carried out with foundation pit enclosure structure
The excavation of next layer of soil layer；
5th step, hand excavation：During apart from substrate 20~30cm of designed elevation, the earthwork uses hand excavation, cuts the earth to hole bottom and sets
Count and carry out concrete cushion construction after absolute altitude in time；
6th step, backfill：Horizontal slice is backfilled to carry out, it is successively upward into horizontal level according to cross section from most being filled out bottom slice
Fill, often fill 2~3 layers and reappose center line and sideline, during backfill, filler next time is spread in both sides simultaneously, is coordinated using excavator
Manual, it is then smooth with bull-dozer, rolled with road roller, complete whole work progress.
2. a kind of foundation ditch construction method according to claim 1, it is characterised in that：Foundation pit enclosure structure in the step 4
Using directly in side slope spray furnace surface layer, wait condense after squeeze into " U " sprig again.
3. a kind of foundation ditch construction method according to claim 1, it is characterised in that：Foundation pit enclosure structure in the step 4
Using bar-mat reinforcement, expanded metal lath or low-carbon cold-drawn silk screen is first constructed in the scope of operation, then spray furnace surface layer, beats again after waiting condensation
Enter " U " sprig.
4. a kind of foundation ditch construction method according to claim 1, it is characterised in that：Side slope after being handled in the step 4
It is complete with domatic smooth-going.
5. a kind of foundation ditch construction method according to claim 1, it is characterised in that：Wireless pressure is sensed in the step 4
The pressure that device is born to place layer is measured, if measured pressure value>0.4MPa, beyond place, layer bears pressure limit, sends
Abnormal alarm sound, and the positional information of pressure value and wireless pressure sensor is transferred to ECC engineering control center.
6. a kind of foundation ditch construction method according to claim 1, it is characterised in that：The traveling of road roller in the step 6
Speed is 2~4Km/h, and compacting factor is 0.85~0.95.
7. a kind of foundation ditch construction method according to claim 1, it is characterised in that：Foundation ditch both sides ground surpasses in work progress
Load≤20Kpa.
8. a kind of foundation ditch construction method according to claim 3, it is characterised in that：The specification of described expanded metal lath be 50 ×
50mm, a diameter of 3cm, expanded metal lath press arc-welding machine welding by hand between the quincunx fixations of 1.5 × 1.5m, mesh sheet using " U " sprig.
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| CN201710356823.1A CN107100171A (en) | 2017-05-19 | 2017-05-19 | A kind of foundation ditch construction method |
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| CN201710356823.1A CN107100171A (en) | 2017-05-19 | 2017-05-19 | A kind of foundation ditch construction method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938680A (en) * | 2017-11-20 | 2018-04-20 | 重庆交通建设(集团)有限责任公司 | A kind of excavation of foundation pit safe construction method |
| CN108007442A (en) * | 2017-12-13 | 2018-05-08 | 山西四建集团有限公司 | Hole construction method is surveyed in experimental plot with automatic monitored control system |
| CN108797608A (en) * | 2018-06-21 | 2018-11-13 | 江苏地基工程有限公司 | A kind of assembled thin bamboo strips used for weaving foundation pit slope protection and its construction method |
| CN109004611A (en) * | 2018-08-01 | 2018-12-14 | 绵阳鼎飞益电子科技有限公司 | Method for transmission line of electricity site operation |
| CN109004610A (en) * | 2018-08-01 | 2018-12-14 | 绵阳鼎飞益电子科技有限公司 | A kind of Phase of Electric Power Projects method |
| CN109092427A (en) * | 2018-08-06 | 2018-12-28 | 四川兴昌建设工程有限公司 | A kind of building waste grinding device and the method using building waste filling foundation pit |
| CN109736334A (en) * | 2019-01-05 | 2019-05-10 | 中国建筑第二工程局有限公司 | Collapsible loess slope support construction device and method |
| CN109736354A (en) * | 2018-12-30 | 2019-05-10 | 中铁十四局集团有限公司 | Tunnel open excavation section main structure construction method |
| CN110056024A (en) * | 2019-04-03 | 2019-07-26 | 嘉兴学院 | Rib type foundation pit forming shovel |
| CN110541421A (en) * | 2019-09-10 | 2019-12-06 | 中建协和建设有限公司 | earth excavation construction method |
| CN111705805A (en) * | 2020-06-18 | 2020-09-25 | 深圳市蛇口招商港湾工程有限公司 | Foundation pit earth and stone square blending method |
| CN112048955A (en) * | 2020-08-20 | 2020-12-08 | 韶关市新城兴建筑工程有限公司 | Construction method for backfilling gravel roadbed |
| CN112695763A (en) * | 2020-12-28 | 2021-04-23 | 中国水利水电第七工程局有限公司 | Deep sludge stratum foundation pit excavation method |
| CN114075805A (en) * | 2020-11-18 | 2022-02-22 | 上海园林（集团）有限公司 | Construction method for foundation earthwork of trestle |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938680A (en) * | 2017-11-20 | 2018-04-20 | 重庆交通建设(集团)有限责任公司 | A kind of excavation of foundation pit safe construction method |
| CN108007442A (en) * | 2017-12-13 | 2018-05-08 | 山西四建集团有限公司 | Hole construction method is surveyed in experimental plot with automatic monitored control system |
| CN108797608A (en) * | 2018-06-21 | 2018-11-13 | 江苏地基工程有限公司 | A kind of assembled thin bamboo strips used for weaving foundation pit slope protection and its construction method |
| CN109004611A (en) * | 2018-08-01 | 2018-12-14 | 绵阳鼎飞益电子科技有限公司 | Method for transmission line of electricity site operation |
| CN109004610A (en) * | 2018-08-01 | 2018-12-14 | 绵阳鼎飞益电子科技有限公司 | A kind of Phase of Electric Power Projects method |
| CN109092427A (en) * | 2018-08-06 | 2018-12-28 | 四川兴昌建设工程有限公司 | A kind of building waste grinding device and the method using building waste filling foundation pit |
| CN109736354A (en) * | 2018-12-30 | 2019-05-10 | 中铁十四局集团有限公司 | Tunnel open excavation section main structure construction method |
| CN109736334A (en) * | 2019-01-05 | 2019-05-10 | 中国建筑第二工程局有限公司 | Collapsible loess slope support construction device and method |
| CN110056024A (en) * | 2019-04-03 | 2019-07-26 | 嘉兴学院 | Rib type foundation pit forming shovel |
| CN110056024B (en) * | 2019-04-03 | 2024-03-26 | 嘉兴学院 | Rib type foundation pit forming shovel |
| CN110541421A (en) * | 2019-09-10 | 2019-12-06 | 中建协和建设有限公司 | earth excavation construction method |
| CN110541421B (en) * | 2019-09-10 | 2021-03-05 | 中建协和建设有限公司 | Earth excavation construction method |
| CN111705805A (en) * | 2020-06-18 | 2020-09-25 | 深圳市蛇口招商港湾工程有限公司 | Foundation pit earth and stone square blending method |
| CN112048955A (en) * | 2020-08-20 | 2020-12-08 | 韶关市新城兴建筑工程有限公司 | Construction method for backfilling gravel roadbed |
| CN112048955B (en) * | 2020-08-20 | 2021-12-07 | 韶关市新城兴建筑工程有限公司 | Construction method for backfilling gravel roadbed |
| CN114075805A (en) * | 2020-11-18 | 2022-02-22 | 上海园林（集团）有限公司 | Construction method for foundation earthwork of trestle |
| CN112695763A (en) * | 2020-12-28 | 2021-04-23 | 中国水利水电第七工程局有限公司 | Deep sludge stratum foundation pit excavation method |
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