CN106759366A - The construction method that soil excavation is arranged with packway in a kind of foundation ditch - Google Patents
The construction method that soil excavation is arranged with packway in a kind of foundation ditch Download PDFInfo
- Publication number
- CN106759366A CN106759366A CN201710060601.5A CN201710060601A CN106759366A CN 106759366 A CN106759366 A CN 106759366A CN 201710060601 A CN201710060601 A CN 201710060601A CN 106759366 A CN106759366 A CN 106759366A
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- foundation ditch
- packway
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- excavation
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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
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the 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
- E02D19/10—Restraining of underground water by lowering level of ground water
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The present invention relates to the construction method that earth excavation in a kind of many close long and narrow foundation ditches of support in rainfall area is arranged with packway, it is mainly achieved through the following technical solutions：(1) packway is arranged on foundation ditch middle part by smooth location, earthwork layer and section, excavate packway soil at both sides, the foundation ditch middle part soil body for leaving and foundation ditch both sides form " W " shape bathtub construction so that rainfall can be pooled to " W " shape bathtub construction bottom near the building enclosure soil body.(2) construction foundation pit gutter and sump is set, the water in gutter is pooled in sump, taken away the water in sump in time with water pumper.The present invention solves the long and narrow foundation ditch in many rainfall areas due to packway damage problem caused by rainfall, there is safe and reliable, convenient construction, shorten the construction period, be a kind of preferred construction method of the earthwork construction for solving the long and narrow foundation ditch packway damage in many rainfall areas.
Description
【Technical field】
The present invention relates to soil excavation in a kind of foundation ditch and the construction method of packway arrangement, and in particular to a kind of many rainfalls
Soil excavation and the construction method of packway arrangement in the close long and narrow foundation ditch of support in area, belong to ground foundation engineering technical field.
【Background technology】
As economic continues to develop, subway and tunnel are built in increasing city, wherein many subways and tunnel are all
Using cut and cover tunneling.When using cut and cover tunneling, the flat shape of subway foundation pit and tunnel foundation ditch is all long and narrow rectangle.
Due to mostly hundreds of meters of foundation ditch length, earth volume is big, then the excavation of foundation ditch is into a great problem.The arrangement of foundation ditch packway
It is the key problem in technology point of foundation pit construction.
Traditional excavation of foundation pit is mostly arranged on foundation ditch middle part using basin excavation and by packway, and the benefit of basin excavation exists
Play a part of the stabilization that horizontal support ensures side slope jointly with campshed in the passive earth pressure of basin side local products life can be utilized.But
It is that, in many rainfalls ground area, basin excavation causes rainwater to concentrate on foundation ditch middle part, and packway is soaked due to rainwater, causes packway
Damage, and it is unfavorable for drainage of foundation pit, this all influences being normally carried out for construction.Foundation ditch can not construct after being soaked, bearing capacity and
Soil property does not meet design requirement.Pit water accumulation can also make supporting course intensity in foundation ditch wreck.
Therefore, in order to solve the above technical problems, it is necessory to provide soil excavation and packway cloth in a kind of foundation ditch of innovation
The construction method put, to overcome the defect of the prior art.
【The content of the invention】
It is an object of the invention to provide soil excavation in a kind of foundation ditch and the construction method of packway arrangement, it is used " W "
Groove profile is excavated, and foundation ditch middle part is packway, and the back-pressure soil that foundation ditch both sides are reserved near building enclosure is interim to substitute support, it is ensured that base
Hole stabilization, not only can guarantee that packway and building enclosure safety but also can guarantee that drainage of foundation pit was smooth.
To achieve the above object, the technical scheme taken of the present invention is：Soil excavation and packway arrangement in a kind of foundation ditch
Construction method, it includes following construction procedure：
(1) after long and narrow foundation ditch city's roads are finished, the project situation according to long and narrow foundation ditch is entered from top to bottom in deep basal pit
The earthwork layering of the row earthwork, and the segmentation of the earthwork is carried out according to project situation, each section of each layer is one piece of soil body；
(2) excavation of foundation pit is symmetrically excavated from centre to both sides, that is, the excavation first since long and narrow foundation ditch side middle part long
The layer earthwork, earth excavation to concrete support beam bottom, cutting depth is 1m or so；Excavation formula is moved back using segmentation, to foundation ditch both sides
Digging is moved back, excavator directly fills soil and gets on the bus, transported outward spoir by dump truck, dug one section of construct immediately concrete Guan Liang and branch
Support, ground floor soil excavation depth only 1m or so is not required to set packway；
(3) during each piece of soil excavation of the second layer and following soil layer, foundation ditch packway is arranged in foundation ditch middle part, using small
Type digging machine first carries out packway soil at both sides excavation, leaves the part foundation ditch middle part soil body and is reserved near building enclosure in foundation ditch both sides
Back-pressure soil, forms " W " shape bathtub construction, and the back-pressure soil that foundation ditch both sides are reserved near building enclosure is interim to substitute support；
(4) when excavating each layer of earthwork, some substratums are divided into by 1.5m or so depth per big layer, are carried out using Miniature digging machine
Earth excavation, is unearthed by high-front shovel or electricity grab bucket, is dug during to 0.5m~1.0m below bracing members, carries out the peace of bracing members
Dress；
(5) the step of repeating (3), (4) after, carries out each layer of excavation of foundation pit and the arrangement of construction packway, that is,
Soil excavation after being carried out in the way of being segmented point step and moving back digging, first supports and digs afterwards；
(6) in Excavation Process, foundation ditch sets gutter or directly utilizes head fall draining, sets sump and takes out
Water；
(7) when backacter does not have enough spaces to be applied, use high-front shovel station instead is carried out on foundation ditch side
It is unearthed；Foundation ditch depth below the 12m earthwork coordinates high-front shovel to be vertically unearthed using Miniature digging machine, and Miniature digging machine finally is hung out into base
Hole.
The construction method that soil excavation is arranged with packway in foundation ditch of the invention is further：The long and narrow foundation ditch is width
35~45m, depth 6m~16m, foundation ditch of the length in more than 150m.
The construction method that soil excavation is arranged with packway in foundation ditch of the invention is further：The layering is according to concrete branch
Come what is be layered, layer height scope is 3m~5m to the arrangement of support or bracing members, and described its length range of segmentation is 20m~30m.
The construction method that soil excavation is arranged with packway in foundation ditch of the invention is further：Packway width is 5m, packway
The gradient is 1：5~10, packway grade of side slope is 1：1.5~2.
The construction method that soil excavation is arranged with packway in foundation ditch of the invention is further：Reserving back-pressure soil width is
3m, it is 1 to reserve back-pressure slight slope degree：1.5~2.
The construction method that soil excavation is arranged with packway in foundation ditch of the invention is also：Gutter is arranged on " W " shape bottom land
Portion, rather than foundation ditch both sides at building enclosure；Head fall represents head fall in tunnel.
Compared with prior art, the present invention has the advantages that：Soil excavation and packway cloth in foundation ditch of the invention
The construction method put by " W " shape slot type excavate, it is ensured that foundation ditch packway not by rainwater soak and damage, accelerate construct into
Degree.Back-pressure is reserved simultaneously so that the passive earth pressure of back-pressure local products life plays a part of horizontal support jointly with campshed, it is ensured that side
The stabilization on slope, has the advantages that safe and reliable, convenient construction, shortens the construction period, is that a kind of many rainfall areas of solution are long and narrow
The preferred construction method of the earthwork construction of foundation ditch packway damage.
【Brief description of the drawings】
Fig. 1 is that excavation of foundation pit of the invention is segmented and sequence of excavation schematic diagram.
Fig. 2 is foundation pit supporting construction figure of the invention.
Fig. 3 is the excavation of foundation pit drawing in side sectional elevation drawn by taking second segment second layer earth excavation as an example in the present invention.
Fig. 4 and Fig. 5 is excavation of foundation pit skiagraph in the present invention.
【Specific embodiment】
Refer to shown in Figure of description 1 to accompanying drawing 5, the present invention is a kind of air channel road tunneling segment structure construction method, especially
It is applied to annual rainfall more than 1000mm, and rainy season rainfall accounts for many rainfalls area of the annual rainfall more than 70%.This hair
The bright construction machinery being related to mainly has mini-excavator, large excavator, high-front shovel, electricity grab bucket and dump truck, relates to
And the pattern foundation pit supporting structure facility for arriving mainly cast-in-situ bored pile, concrete support, steel pipe support and lattice column.
The concrete construction method of the construction method that soil excavation is arranged with packway is comprised the following steps in foundation ditch of the invention：
(1) after long and narrow foundation ditch city's roads are finished, the project situation according to long and narrow foundation ditch is entered from top to bottom in deep basal pit
The earthwork layering of the row earthwork, and the segmentation of the earthwork is carried out according to project situation, each section of each layer is one piece of soil body.Described
Long and narrow foundation ditch is 35~45m of width, and depth 6m~16m, length is particularly suited for open cut big cross section tunnel in the foundation ditch of more than 150m
Road base pit engineering.Described layering is layered according to the arrangement of concrete support or bracing members, and layer height scope is 3m~5m,
Its length range of described segmentation is 20m~30m.
(2) excavation of foundation pit is symmetrically excavated from centre to both sides, that is, the excavation first since long and narrow foundation ditch side middle part long
The layer earthwork, earth excavation to concrete support beam bottom, cutting depth is 1m or so；Excavation formula is moved back using segmentation, to foundation ditch both sides
Digging is moved back, excavator directly fills soil and gets on the bus, transported outward spoir by dump truck, dug one section of construct immediately concrete Guan Liang and branch
Support, ground floor soil excavation depth only 1m or so is not required to set packway.
(3) during each piece of soil excavation of the second layer and following soil layer, foundation ditch packway is arranged in foundation ditch middle part, using small
Type digging machine first carries out packway soil at both sides excavation, leaves the part foundation ditch middle part soil body and is reserved near building enclosure in foundation ditch both sides
Back-pressure soil, forms " W " shape bathtub construction, and the back-pressure soil that foundation ditch both sides are reserved near building enclosure is interim to substitute support, it is ensured that base
Hole stabilization.In the present embodiment, the packway width is 5m, and the packway gradient is 1：5~10, packway grade of side slope is 1：1.5
~2, it is ensured that the stabilization of support pile and foundation ditch and leave working face, the earthwork of both sides support pile side 3m wide scopes to bracing members are installed
Must not excavate, 1 is built beyond 3m scopes:1.5~2 slope ratio.Reserved back-pressure soil width is 3m, and it is 1 to reserve back-pressure slight slope degree：
1.5~2.
(4) when excavating each layer of earthwork, some substratums are divided into by 1.5m or so depth per big layer, are carried out using Miniature digging machine
Earth excavation, is unearthed by high-front shovel or electricity grab bucket, is dug during to 0.5m~1.0m below bracing members, carries out the peace of bracing members
Dress.
(5) the step of repeating (3), (4) after, carries out each layer of excavation of foundation pit and the arrangement of construction packway, that is,
Soil excavation after being carried out in the way of being segmented point step and moving back digging, first supports and digs afterwards.Simultaneously in strict accordance with " tau-effect " and " first
Dug after support " theoretical and principle instructs pit earthwork to excavate and propping, accomplish in digging process " layering, piecemeal, it is symmetrical, balance,
Excavate in limited time " and propping, base is followed first to support and dug afterwards, forbids to backbreak；
(6) in Excavation Process, foundation ditch sets gutter or directly utilizes head fall draining, sets sump and takes out
Water.The gutter is arranged on " W " shape trench bottom, rather than foundation ditch both sides at building enclosure；Head fall is represented in tunnel
Head fall.
(7) when backacter does not have enough spaces to be applied, use high-front shovel station instead is carried out on foundation ditch side
It is unearthed；Foundation ditch depth below the 12m earthwork coordinates high-front shovel to be vertically unearthed using Miniature digging machine, and Miniature digging machine finally is hung out into base
Hole.
Specific embodiment above is only the preferred embodiment of this creation, is not used to limit this creation, all in this wound
Any modification, equivalent substitution and improvements for being done etc. within the spirit and principle of work, should be included in this creation protection domain it
It is interior.
Claims (6)
1. the construction method that soil excavation is arranged with packway in a kind of foundation ditch, it is characterised in that：Including following construction procedure：
(1) after long and narrow foundation ditch city's roads are finished, the project situation according to long and narrow foundation ditch carries out soil from top to bottom in deep basal pit
The earthwork layering of side, and the segmentation of the earthwork is carried out according to project situation, each section of each layer is one piece of soil body；
(2) excavation of foundation pit is symmetrically excavated from centre to both sides, that is, excavates ground floor soil since long and narrow foundation ditch side middle part long
Side, earth excavation to concrete support beam bottom, cutting depth is 1m or so；Excavation formula is moved back using segmentation, digging is moved back to foundation ditch both sides,
Excavator directly fills soil and gets on the bus, and is transported outward spoir by dump truck, has dug one section of construct immediately concrete Guan Liang and support, first
Layer soil body cutting depth only 1m or so, is not required to set packway；
(3) during each piece of soil excavation of the second layer and following soil layer, foundation ditch packway is arranged in foundation ditch middle part, using small-sized digging
Machine first carries out packway soil at both sides excavation, leaves the part foundation ditch middle part soil body and reserves back-pressure near building enclosure in foundation ditch both sides
Soil, forms " W " shape bathtub construction, and the back-pressure soil that foundation ditch both sides are reserved near building enclosure is interim to substitute support；
(4) when excavating each layer of earthwork, some substratums are divided into by 1.5m or so depth per big layer, the earthwork is carried out using Miniature digging machine
Excavate, be unearthed by high-front shovel or electricity grab bucket, dig during to 0.5m~1.0m below bracing members, carry out the installation of bracing members；
(5) the step of repeating (3), (4) after, carries out each layer of excavation of foundation pit and the arrangement of construction horse, that is, to be segmented
Point step move back digging mode carry out after soil excavation, first support and dig afterwards；
(6) in Excavation Process, foundation ditch sets gutter or directly utilizes head fall draining, sets sump and draws water；
(6) when backacter does not have enough spaces to be applied, use high-front shovel station instead and be unearthed on foundation ditch side；
Foundation ditch depth below the 12m earthwork coordinates high-front shovel to be vertically unearthed using Miniature digging machine, and Miniature digging machine finally is hung out into foundation ditch.
2. the construction method that soil excavation is arranged with packway in foundation ditch as claimed in claim 1, it is characterised in that：It is described long and narrow
Foundation ditch is 35~45m of width, depth 6m~16m, foundation ditch of the length in more than 150m.
3. the construction method that soil excavation is arranged with packway in foundation ditch as claimed in claim 1, it is characterised in that：The layering
It is to be layered according to the arrangement of concrete support or bracing members, layer height scope is 3m~5m, described its length range of segmentation
It is 20m~30m.
4. the construction method that soil excavation is arranged with packway in foundation ditch as claimed in claim 1, it is characterised in that：Packway width
It is 5m, the packway gradient is 1：5~10, packway grade of side slope is 1：1.5~2.
5. the construction method that soil excavation is arranged with packway in foundation ditch as claimed in claim 1, it is characterised in that：Reserved back-pressure
Native width is 3m, and it is 1 to reserve back-pressure slight slope degree：1.5~2.
6. the construction method that soil excavation is arranged with packway in foundation ditch as claimed in claim 1, it is characterised in that：Gutter sets
Put in " W " shape trench bottom, rather than foundation ditch both sides at building enclosure；Head fall represents head fall in tunnel.
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| CN201710060601.5A CN106759366B (en) | 2017-01-25 | 2017-01-25 | The construction method of soil excavation and riding track arrangement in a kind of foundation pit |
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| CN201710060601.5A CN106759366B (en) | 2017-01-25 | 2017-01-25 | The construction method of soil excavation and riding track arrangement in a kind of foundation pit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700493A (en) * | 2017-07-14 | 2018-02-16 | 腾达建设集团股份有限公司 | Basin earthwork excavation method in the small yardstick block of weak soil subway foundation pit |
| 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 |
| CN108643198A (en) * | 2018-04-18 | 2018-10-12 | 中国十七冶集团有限公司 | Excavation of earthwork structure and its construction method between a kind of long and narrow foundation pit pile of ultra-deep |
| CN109750825A (en) * | 2018-12-29 | 2019-05-14 | 杭州江润科技有限公司 | The construction method of foundation pit suspension type riding track |
| CN110158603A (en) * | 2019-06-14 | 2019-08-23 | 北京翔鲲水务建设有限公司 | Long and narrow deep foundation pit earthwork digging method |
| CN110158604A (en) * | 2019-06-19 | 2019-08-23 | 北京城建北方集团有限公司 | Support construction method at foundation pit riding track |
| CN114086566A (en) * | 2021-11-10 | 2022-02-25 | 中铁第四勘察设计院集团有限公司 | Long and narrow soft soil foundation pit excavation support and soil transportation method |
| CN114991159A (en) * | 2022-05-16 | 2022-09-02 | 中铁六局集团有限公司 | Subway station deep foundation pit riding track type rapid unearthing construction method |
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| JPH05287746A (en) * | 1992-04-07 | 1993-11-02 | Fujita Corp | Back driving earth retaining method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700493A (en) * | 2017-07-14 | 2018-02-16 | 腾达建设集团股份有限公司 | Basin earthwork excavation method in the small yardstick block of weak soil subway foundation pit |
| CN107700493B (en) * | 2017-07-14 | 2019-08-16 | 腾达建设集团股份有限公司 | Basin earthwork excavation method in the small scale block of weak soil subway foundation pit |
| 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 |
| CN108643198A (en) * | 2018-04-18 | 2018-10-12 | 中国十七冶集团有限公司 | Excavation of earthwork structure and its construction method between a kind of long and narrow foundation pit pile of ultra-deep |
| CN109750825A (en) * | 2018-12-29 | 2019-05-14 | 杭州江润科技有限公司 | The construction method of foundation pit suspension type riding track |
| CN110158603A (en) * | 2019-06-14 | 2019-08-23 | 北京翔鲲水务建设有限公司 | Long and narrow deep foundation pit earthwork digging method |
| CN110158604A (en) * | 2019-06-19 | 2019-08-23 | 北京城建北方集团有限公司 | Support construction method at foundation pit riding track |
| CN110158604B (en) * | 2019-06-19 | 2021-07-02 | 北京城建北方集团有限公司 | Construction method of supporting structure at underpass of foundation pit |
| CN114086566A (en) * | 2021-11-10 | 2022-02-25 | 中铁第四勘察设计院集团有限公司 | Long and narrow soft soil foundation pit excavation support and soil transportation method |
| CN114991159A (en) * | 2022-05-16 | 2022-09-02 | 中铁六局集团有限公司 | Subway station deep foundation pit riding track type rapid unearthing construction method |
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| CN106759366B (en) | 2018-10-09 |
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