CN104988930B - It is applicable to the construction method in the combined type cofferdam of Unfavorable geology deep basal pit - Google Patents
It is applicable to the construction method in the combined type cofferdam of Unfavorable geology deep basal pit Download PDFInfo
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- CN104988930B CN104988930B CN201510415681.2A CN201510415681A CN104988930B CN 104988930 B CN104988930 B CN 104988930B CN 201510415681 A CN201510415681 A CN 201510415681A CN 104988930 B CN104988930 B CN 104988930B
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Abstract
The invention discloses the construction method in a kind of combined type cofferdam being applicable to Unfavorable geology deep basal pit, relate to field of bridge construction, the method comprises the following steps: the construction location of concrete cofferdam is carried out setting-out；Carrying out substrate on construction location to change and fill out, and lay support chock and steel cutting shoe, assembling reinforcement, casting concrete cofferdam, at the pre-buried anchor bar of top of concrete；First inner support is installed in concrete cofferdam；Concrete cofferdam is made to sink；Installing steel sheet pile at concrete cofferdam end face, install the second inner support in steel sheet pile, the second inner support is fixed with anchor bar, in the 3rd inner support installed above of the second inner support；Concrete cofferdam is made to continue to sink down into design altitude.Combined type cofferdam in the present invention disclosure satisfy that structure stress requirement, it is to avoid the building waste that produces when concrete cofferdam is removed, dust, the environmental pollution, beneficially green construction such as noise, effective accelerating construction progress, saves construction cost.
Description
Technical field
The present invention relates to field of bridge construction, be specifically related to one and be applicable to the deep base of Unfavorable geology
The construction method in the combined type cofferdam in hole.
Background technology
Traditional deep pit support gear safeguard structure typically has steel sheet pile, concrete cofferdam, steel-pipe pile
Deng, steel sheet pile is the most reusable with steel-pipe pile, inserted to play, extracts easily, easy construction, fast
Victory, shortcoming is as foundation depth and strengthens, and steel sheet pile and the flexible increase of steel-pipe pile, for opening
Digging the Unfavorable geology foundation ditch that the degree of depth is bigger, the anchoring section of steel sheet pile and steel-pipe pile is all difficult to meet knot
Structure force request；Concrete cofferdam structure stress situation is preferable, but there is sinking cycle length, one-tenth
This is big, the later stage removes difficulty, be unfavorable for the problems such as green construction.
Summary of the invention
The invention aims to overcome the deficiency of above-mentioned background technology, it is provided that one is applicable to
The construction method in the combined type cofferdam of Unfavorable geology deep basal pit, concrete cofferdam of first constructing, and
After making concrete cofferdam sink down into original ground absolute altitude 0.8～1.2m, concrete cofferdam is installed
Steel sheet pile, forms combined type cofferdam, then by combined type cofferdam integral sinking to designed elevation,
Use the combined type cofferdam in the present invention to be not only able to meet structure stress requirement, and can keep away
The building waste exempting to produce when concrete cofferdam is removed, dust, the environmental pollution such as noise, favorably
In green construction, effective accelerating construction progress, save construction cost.
The present invention provides the construction party in a kind of combined type cofferdam being applicable to Unfavorable geology deep basal pit
Method, comprises the following steps:
S1: construction basis drilled pile, construction location to concrete cofferdam above drilled pile
Carry out setting-out；Described construction location is carried out after substrate changes and fill out, on substrate Shang Zhu island,
Forward step S2 to；
S2: lay supporting pad wood and steel cutting shoe, assembling reinforcement on described construction location, pour
Concrete cofferdam, the pre-buried some anchor bars of end face at concrete cofferdam, forward step S3 to；
S3: concrete cofferdam is carried out maintenance, treats that the concrete strength of concrete cofferdam end face reaches
After design strength, the first inner support is installed in concrete cofferdam；Extract support chock,
Carry out jetting in concrete cofferdam and inhale mud, making concrete cofferdam sink down into original ground absolute altitude
0.8～1.2m, forward step S4 to；
S4: the end face at concrete cofferdam installs steel sheet pile, by steel sheet pile and concrete cofferdam
Junction is filled closely knit, installs the second inner support, the second inner support and anchoring steel in steel sheet pile
Muscle is fixing to be connected, in the 3rd inner support installed above of the second inner support；In concrete cofferdam
Proceed jetting and inhale mud, making concrete cofferdam continue to sink down into design altitude, terminating.
On the basis of technique scheme, in step S2 between adjacent two anchor bars
Apart from equal.
On the basis of technique scheme, in step S2 between adjacent two anchor bars
Distance is 2～2.8m.
On the basis of technique scheme, steel sheet pile described in step S4 and concrete cofferdam
Junction use mortar fill closely knit.
Compared with prior art, advantages of the present invention is as follows:
First the present invention constructs concrete cofferdam, and make concrete cofferdam sink down into original ground mark
After high 0.8-1.2m, concrete cofferdam is installed steel sheet pile, form combined type cofferdam, so
After by combined type cofferdam integral sinking to designed elevation, use the combined type cofferdam in the present invention not
But disclosure satisfy that structure stress requirement, and it can be avoided that produce when concrete cofferdam is removed builds
The environmental pollutions, beneficially green construction such as building refuse, dust, noise, effectively accelerate to construct into
Degree, saves construction cost.
Accompanying drawing explanation
Fig. 1 is that in the embodiment of the present invention, concrete cofferdam pours schematic diagram.
Fig. 2 is concrete cofferdam sinking schematic diagram in the embodiment of the present invention.
Fig. 3 is embodiment of the present invention Steel Sheet Pile scheme of installation.
Reference: 1-concrete cofferdam, 2-anchor bar, 3-the first inner support, 4-steel plate
Stake, 5-the second inner support, 6-the 3rd inner support.
Detailed description of the invention
Below in conjunction with the accompanying drawings and the present invention is described in further detail by specific embodiment.
The embodiment of the present invention provides a kind of combined type cofferdam being applicable to Unfavorable geology deep basal pit
Construction method, comprises the following steps:
S1: construction basis drilled pile, construction position to concrete cofferdam 1 above drilled pile
Put and carry out setting-out；Described construction location is carried out after substrate changes and fill out, on substrate Shang Zhu island,
Forward step S2 to.
S2: shown in Figure 1, lays supporting pad wood and steel cutting shoe on described construction location,
Assembling reinforcement, casting concrete cofferdam 1, the pre-buried some anchorings of end face at concrete cofferdam 1
Reinforcing bar 2, the distance between adjacent two anchor bars 2 is equal, and generally 2～2.8m forward to
Step S3.
S3: shown in Figure 2, carries out maintenance to concrete cofferdam 1, treats concrete cofferdam 1
After the concrete strength of end face reaches design strength, prop up in installing first in concrete cofferdam 1
Support 3；Extract support chock, and in concrete cofferdam 1, carry out jetting and inhale mud, make coagulation
Earth cofferdam 1 sinks down into original ground absolute altitude 0.8～1.2m, forwards step S4 to.
S4: shown in Figure 3, the end face at concrete cofferdam 1 installs steel sheet pile 4, by steel
It is closely knit that sheet pile 4 and the junction of concrete cofferdam 1 use mortar to fill, and pacifies in steel sheet pile 4
Filling the second inner support 5, the second inner support 5 is fixing with anchor bar 2 to be connected, and props up in second
3rd inner support 6 installed above of support 5；Jetting and suction is proceeded in concrete cofferdam 1
Mud, makes concrete cofferdam 1 continue to sink down into design altitude, terminates.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if
If these amendment and modification within the scope of the claims in the present invention and equivalent technologies thereof, then this
A little amendments and modification are also within protection scope of the present invention.
The prior art that the content not described in detail in specification is known to the skilled person.
Claims (4)
1. being applicable to the construction method in the combined type cofferdam of Unfavorable geology deep basal pit, it is special
Levy and be, comprise the following steps:
S1: construction basis drilled pile, executes concrete cofferdam (1) above drilled pile
Station is put and is carried out setting-out；Described construction location is carried out after substrate changes and fill out, in substrate
Build island, forward step S2 to；
S2: lay supporting pad wood and steel cutting shoe, assembling reinforcement on described construction location, pour
Concrete cofferdam (1), the pre-buried some anchor bars of the end face (2) at concrete cofferdam (1),
Forward step S3 to；
S3: concrete cofferdam (1) is carried out maintenance, treats the mixed of concrete cofferdam (1) end face
After solidifying soil intensity reaches design strength, the first inner support (3) is installed in concrete cofferdam (1)；
Extract support chock, in concrete cofferdam (1), carry out jetting and inhale mud, making coagulation fortifield village
Weir (1) sinks down into original ground absolute altitude 0.8～1.2m, forwards step S4 to；
S4: the end face at concrete cofferdam (1) installs steel sheet pile (4), by steel sheet pile (4)
Fill closely knit with the junction of concrete cofferdam (1), in installing second in steel sheet pile (4)
Supporting (5), the second inner support (5) is fixing with anchor bar (2) to be connected, and props up in second
3rd inner support (6) installed above of support (5)；Proceed in concrete cofferdam (1)
Jetting and suction mud, make concrete cofferdam (1) continue to sink down into design altitude, terminate.
It is applicable to the combined type cofferdam of Unfavorable geology deep basal pit the most as claimed in claim 1
Construction method, it is characterised in that: in step S2 between adjacent two anchor bars (2) away from
From equal.
It is applicable to the combined type cofferdam of Unfavorable geology deep basal pit the most as claimed in claim 2
Construction method, it is characterised in that: in step S2 between adjacent two anchor bars (2) away from
From for 2～2.8m.
It is applicable to Unfavorable geology deep basal pit the most as claimed any one in claims 1 to 3
The construction method in combined type cofferdam, it is characterised in that: steel sheet pile described in step S4 (4) with
It is closely knit that the junction of concrete cofferdam (1) uses mortar to fill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415681.2A CN104988930B (en) | 2015-07-16 | 2015-07-16 | It is applicable to the construction method in the combined type cofferdam of Unfavorable geology deep basal pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510415681.2A CN104988930B (en) | 2015-07-16 | 2015-07-16 | It is applicable to the construction method in the combined type cofferdam of Unfavorable geology deep basal pit |
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| Publication Number | Publication Date |
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| CN104988930A CN104988930A (en) | 2015-10-21 |
| CN104988930B true CN104988930B (en) | 2016-09-07 |
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| CN201510415681.2A Active CN104988930B (en) | 2015-07-16 | 2015-07-16 | It is applicable to the construction method in the combined type cofferdam of Unfavorable geology deep basal pit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714833B (en) * | 2016-03-01 | 2017-06-30 | 江苏东合南岩土科技股份有限公司 | A kind of construction method of steel sheet pile open caisson supporting |
| CN106193075A (en) * | 2016-08-24 | 2016-12-07 | 中国铁建大桥工程局集团有限公司 | A kind of concrete cofferdam and steel sheet-pile cofferdam combination type cofferdam structure and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691302A (en) * | 2012-06-03 | 2012-09-26 | 蒋凤昌 | Concrete structure for supporting deep foundation pit |
| CN103015446A (en) * | 2012-08-10 | 2013-04-03 | 中铁大桥局股份有限公司 | Method for constructing bearing platform on deepwater and rigid impermeable layer |
| CN104594367A (en) * | 2015-01-23 | 2015-05-06 | 中国建筑第七工程局有限公司 | Combined cofferdam structure and construction method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5712721A (en) * | 1980-06-27 | 1982-01-22 | Hazama Gumi Ltd | Method for water cut off and shoring work |
| JP3567390B2 (en) * | 1996-02-05 | 2004-09-22 | 清水建設株式会社 | Retaining structure with continuous underground wall |
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2015
- 2015-07-16 CN CN201510415681.2A patent/CN104988930B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691302A (en) * | 2012-06-03 | 2012-09-26 | 蒋凤昌 | Concrete structure for supporting deep foundation pit |
| CN103015446A (en) * | 2012-08-10 | 2013-04-03 | 中铁大桥局股份有限公司 | Method for constructing bearing platform on deepwater and rigid impermeable layer |
| CN104594367A (en) * | 2015-01-23 | 2015-05-06 | 中国建筑第七工程局有限公司 | Combined cofferdam structure and construction method |
Non-Patent Citations (1)
| Title |
|---|
| 富水砾石地层承台基坑钢筋混凝土围堰防护施工技术;谢阳平等;《北方交通》;20130628(第6期);第89-92页 * |
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| CN104988930A (en) | 2015-10-21 |
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