CN103243733A - Pile foundation construction method for working mountainous areas foundation with multilayer distributing hard rock strata - Google Patents
Pile foundation construction method for working mountainous areas foundation with multilayer distributing hard rock strata Download PDFInfo
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- CN103243733A CN103243733A CN2013101679068A CN201310167906A CN103243733A CN 103243733 A CN103243733 A CN 103243733A CN 2013101679068 A CN2013101679068 A CN 2013101679068A CN 201310167906 A CN201310167906 A CN 201310167906A CN 103243733 A CN103243733 A CN 103243733A
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Abstract
The invention relates to a pile foundation construction method for working mountainous areas foundation with multilayer distributing hard rock strata. The pile foundation construction method includes digging out foundation earth above the hard rock strata, digging out foundation earth of areas to be built pile foundation from top to bottom, breaking the hard rock strata located on the end portion of a hole by utilizing an air pick, priming concrete layer by layer into the hole to form a ground floor pile, forming a column type pile on the pile head of the ground floor pile and the like. Bored piles are adopted in the hard rock strata distributed area when multilayer-distributing hard rock strata are existed in the foundation during the constructing process. The column type piles are adopted on the top portions of the bored pipes in the area above the hard rock strata, so that pile lengths of original designed piles are not changed, designed requirement and construction quality are guaranteed, construction difficulties are reduced and the pile foundation construction method has the advantages of safety, effectiveness, controllability and the like.
Description
Technical field
The invention belongs to bridges and culverts pile foundation construction technical field, particularly relate to a kind of pile base construction method that has multilayer distribution competent bed in the ground of mountain area that excavates.
Background technology
Along with the develop rapidly of town and country construction, existing means of transportation can't meet the demands, therefore need newly-built bridge in many cases.When needs build a bridge in the mountain area, at first need build in the excavation location at least four five ten meters stride the bridge pier base.But.If in work progress, run into the situation of the competent bed that has the multilayer distribution in the ground, auger can't bore these rock stratum, therefore the engineering difficulty is big, so tend to take to shorten the processing method of designing pile length at present, will the people be supporting capacity and the safety factor that reduces bridge like this.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide the pile base construction method that has multilayer distribution competent bed in a kind of validity excavation mountain area ground good, safe and control easily.
In order to achieve the above object, exist the pile base construction method of multilayer distribution competent bed to comprise the following step that carries out in order in the ground of excavation provided by the invention mountain area:
When 1) in the ground of excavation mountain area, running into the competent bed of multilayer distribution, at first waiting that excavating the zone adopts plant equipment that the foundation soil above the competent bed is dug out and leaves in nearby, then smooth place;
2) waiting that by operating personnel the position that pile foundation is set digs out foundation soil to form the hole from top to bottom on the place after smooth, utilize pneumatic pick that the superiors' competent bed that is positioned at hole bottom is carried out fragmentation then and it is penetrated, continue to cut the earth and broken following competent bed, until the projected depth that reaches whole pile foundation;
3) void quarrel, the ponding of bottom, hole are cleaned out, the bottom stake that utilizes lifting appliance to have tied up is then put into above-mentioned hole of having bored with reinforcing cage, conduit is installed, utilize tumbling barrel to adopt the conventional dried method of watering that concrete delamination is poured in the hole afterwards, treat that concrete setting sclerosis back forms the bottom stake;
4) treat bottom stake maintenance after the intensity of designing requirement, adopt conventional method that pile crown is abolished the cutter hair and handle;
5) assembly unit next segmented column formula stake steel form on the pile crown of bottom stake, next the segmented column formula stake that utilizes lifting appliance to have tied up is then put into above-mentioned steel form with reinforcing cage, utilize tumbling barrel to adopt the dried method of watering that concrete delamination is poured in the steel form afterwards, treat that concrete setting sclerosis back forms next segmented column formula stake, removes steel form afterwards;
6) method that adopts mechanical execution is carried out the foundation soil backfill and is rolled around next segmented column formula stake, carry out the construction of the second segmented column formula stake according to the method for step 5) in next segmented column formula stake then, and around the second segmented column formula stake, carry out the foundation soil backfill and roll, so repeatedly, reach the design length of whole pile foundation until the overall length of bottom stake and pillar stake, can finish the work progress of whole pile foundation.
The cutting depth of foundation soil is to the competent bed 5m apart from the superiors in the described step 1).
The pile base construction method that has multilayer distribution competent bed in the ground of excavation provided by the invention mountain area is when running into the competent bed that has the multilayer distribution in the ground in the pile foundation construction process, adopt bored pile in the competent bed distributed areas, and adopt the constructure scheme of pillar stake at the bored pile napex of competent bed upper area, so both can guarantee that former designing pile length length was constant, thereby designing requirement and workmanship have been guaranteed, and reduced difficulty of construction, have advantages such as safety, validity and controllability.
Description of drawings
Fig. 1-Fig. 5 is whole construction course schematic diagram when adopting the pile base construction method that has multilayer distribution competent bed in the ground of excavation provided by the invention mountain area.
The specific embodiment
Below in conjunction with the drawings and specific embodiments to existing the pile base construction method of multilayer distribution competent bed to be elaborated in the ground of excavation provided by the invention mountain area.
As Fig. 1-shown in Figure 5, exist the pile base construction method of multilayer distribution competent bed to comprise the following step that carries out in order in the ground of excavation provided by the invention mountain area:
When 1) in excavation mountain area ground 1, running into the competent bed 2 of multilayer distribution, at first adopt such as excavator, loader and fortune plant equipment such as unload the foundation soil above the competent bed 2 is dug out and leaves in nearby waiting to excavate the zone, cutting depth is to the competent bed 5m apart from the superiors, smooth place has enough reinforcing cage assembly unit places and concrete tank operating area with assurance then;
2) waiting that by operating personnel 5 position that pile foundation is set digs out foundation soil to form hole 6 from top to bottom on the place after smooth, utilize pneumatic pick that the superiors' competent bed 2 that is positioned at 6 bottoms, hole is carried out fragmentation then and it is penetrated, continue to cut the earth and broken following competent bed 2, until the projected depth that reaches whole pile foundation; In addition, in order to prevent that well head takes place in the borehole process to cave in and falling rocks, should carry out a well fore shaft in advance, and should carry out retaining wall in the digging process, the merogenesis excavation;
3) void quarrel, the ponding of 6 bottoms, hole are cleaned out, the bottom stake 3 usefulness reinforcing cages 7 that utilize lifting appliance 10 to have tied up are then put into the above-mentioned hole of having bored 6, conduit is installed, utilize tumbling barrel to adopt the conventional dried method of watering that concrete delamination is poured in the hole 6 afterwards, treat that concrete setting sclerosis back forms bottom stake 3;
4) treat bottom stake 3 maintenances after the intensity of designing requirement, adopt conventional method that pile crown is abolished the cutter hair and handle;
5) assembly unit next segmented column formula stake 8 usefulness steel form 9 on the pile crown of bottom stake 3, next the segmented column formula stake 8 usefulness reinforcing cage that utilize lifting appliance 10 to have tied up are then put into above-mentioned steel form 9, utilize tumbling barrel to adopt the dried method of watering that concrete delamination is poured in the steel form 9 afterwards, treat that concrete setting sclerosis back forms next segmented column formula stake 8, removes steel form afterwards;
6) method that adopts mechanical execution is carried out the foundation soil backfill and is rolled around next segmented column formula stake 8, carry out the construction of the second segmented column formula stake 8 according to the method for step 5) in next segmented column formula stake 8 then, and around the second segmented column formula stake 8, carry out the foundation soil backfill and roll, so repeatedly, reach the design length of whole pile foundation until the overall length of bottom stake 3 and pillar stake 8, can finish the work progress of whole pile foundation.
Claims (2)
1. one kind is excavated the pile base construction method that has multilayer distribution competent bed in the ground of mountain area, it is characterized in that: described pile base construction method comprises the following step that carries out in order:
When 1) in excavation mountain area ground (1), running into the competent bed (2) of multilayer distribution, at first waiting that excavating the zone adopts plant equipment that the foundation soil above the competent bed (2) is dug out and leaves in nearby, then smooth place;
2) waiting that by operating personnel 5 position that pile foundation is set digs out foundation soil to form hole (6) from top to bottom on the place after smooth, utilize pneumatic pick that the superiors' competent bed (2) that is positioned at hole (6) bottom is carried out fragmentation then and it is penetrated, continue to cut the earth and broken following competent bed (2), until the projected depth that reaches whole pile foundation;
3) void quarrel, the ponding of hole (6) bottom are cleaned out, the bottom stake (3) that utilizes lifting appliance (10) to have tied up is then put into above-mentioned hole of having bored (6) with reinforcing cage (7), conduit is installed, utilize tumbling barrel to adopt the conventional dried method of watering that concrete delamination is poured in the hole (6) afterwards, treat that concrete setting sclerosis back forms bottom stake (3);
4) treat bottom stake (3) maintenance after the intensity of designing requirement, adopt conventional method that pile crown is abolished the cutter hair and handle;
5) on the pile crown of bottom stake (3) assembly unit next segmented column formula stake (8) with steel form (9), next the segmented column formula stake (8) that utilizes lifting appliance (10) to have tied up is then put into above-mentioned steel form (9) with reinforcing cage, utilize tumbling barrel to adopt the dried method of watering that concrete delamination is poured in the steel form (9) afterwards, treat that concrete setting sclerosis back forms next segmented column formula stake (8), removes steel form afterwards;
6) method that adopts mechanical execution is carried out the foundation soil backfill and is rolled around next segmented column formula stake (8), carry out the construction of the second segmented column formula stake (8) according to the method for step 5) in next segmented column formula stake (8) then, and around the second segmented column formula stake (8), carry out the foundation soil backfill and roll, so repeatedly, reach the design length of whole pile foundation until the overall length of bottom stake (3) and pillar stake (8), can finish the work progress of whole pile foundation.
2. have the pile base construction method of multilayer distribution competent bed in the ground of excavation according to claim 1 mountain area, it is characterized in that: the cutting depth of foundation soil is for to the competent bed 5m apart from the superiors in the described step 1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101679068A CN103243733A (en) | 2013-05-09 | 2013-05-09 | Pile foundation construction method for working mountainous areas foundation with multilayer distributing hard rock strata |
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| CN2013101679068A CN103243733A (en) | 2013-05-09 | 2013-05-09 | Pile foundation construction method for working mountainous areas foundation with multilayer distributing hard rock strata |
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| CN103243733A true CN103243733A (en) | 2013-08-14 |
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| CN2013101679068A Pending CN103243733A (en) | 2013-05-09 | 2013-05-09 | Pile foundation construction method for working mountainous areas foundation with multilayer distributing hard rock strata |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869489A (en) * | 2017-03-21 | 2017-06-20 | 中建三局第建设工程有限责任公司 | Super High Core Walls Structure level and vertical synchronous construction top module system and construction method |
Citations (4)
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| CN1598166A (en) * | 2004-08-10 | 2005-03-23 | 山东省机械施工公司 | Hollow artificial hole digging bored concrete pile and its construction method |
| CN101586337A (en) * | 2009-03-17 | 2009-11-25 | 洪子云 | Holding type major diameter static pressure sinking pipe cast-in-place pile construction method and pile-pressing machine thereof |
| GB2478362A (en) * | 2010-03-06 | 2011-09-07 | Shire Structures Ltd | A pile with a tube extending lengthwise of the pile |
| CN103015717A (en) * | 2012-12-01 | 2013-04-03 | 中国建筑第七工程局有限公司 | Construction process for coating faced concrete outside ultrahigh steel tube column after floor is closed |
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2013
- 2013-05-09 CN CN2013101679068A patent/CN103243733A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1598166A (en) * | 2004-08-10 | 2005-03-23 | 山东省机械施工公司 | Hollow artificial hole digging bored concrete pile and its construction method |
| CN101586337A (en) * | 2009-03-17 | 2009-11-25 | 洪子云 | Holding type major diameter static pressure sinking pipe cast-in-place pile construction method and pile-pressing machine thereof |
| GB2478362A (en) * | 2010-03-06 | 2011-09-07 | Shire Structures Ltd | A pile with a tube extending lengthwise of the pile |
| CN103015717A (en) * | 2012-12-01 | 2013-04-03 | 中国建筑第七工程局有限公司 | Construction process for coating faced concrete outside ultrahigh steel tube column after floor is closed |
Non-Patent Citations (1)
| Title |
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| 唐业清: "《<铁道标准设计通讯>－土力学基础工程新进展》", 31 October 1988, 铁道标准设计通讯编辑部 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869489A (en) * | 2017-03-21 | 2017-06-20 | 中建三局第建设工程有限责任公司 | Super High Core Walls Structure level and vertical synchronous construction top module system and construction method |
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Application publication date: 20130814 |