CN105155547A - Construction method for deep foundation pit excavation on steep slope terrain - Google Patents
Construction method for deep foundation pit excavation on steep slope terrain Download PDFInfo
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Abstract
The invention relates to a construction method for deep foundation pit excavation on steep slope terrain. The method comprises: arranging a main detour to enter a base structure to construct, in a range of the main detour to the base structure, excavating a ballast collection platform; excavating a slope crest along the side slope on the upper side of the ballast collection platform upward to a design foundation pit, excavating a ballast sliding channel from the slope crest to the ballast collection platform; building a detour used for a mechanical device to enter the foundation pit on the proper position of a hillside toward the top of the foundation pit; excavating layer by layer from the side slope crest of the foundation pit from top to bottom, constructing slope protection in time, rock blasting using a left-right subdivision method; after an excavator accesses from a foundation pit top, the excavator going down layer by layer with excavation, until the excavator goes down to an elevation position of a mucking channel, the excavator going out from the mucking channel; the sliding ballast sliding to the ballast collection platform in the foundation pit along a ballast sliding slope being loaded in a handling vehicle by the excavator and being carried away from the mucking channel of the foundation pit. The method solves problems that a plurality of detours accessing and leaving the foundation pit cannot be arranged on a steep slope terrain, and a problem that ballast cannot slide down from a slope in foundation pit excavation is solved.
Description
Technical field
The present invention relates to construction techniques, specifically the construction method of a kind of steep slope topography place deep pit digging.
Background technology
General excavation of foundation pit is all back down beginning stage excavation from foundation ditch, and limit excavation frontier defense is protected, excavation one-level protection shaping one-level.To the deep foundation ditch on steep slope topography, because environmental requirement does not allow to slip quarrel downwards, excavate step by step from the top down, need to build many horizontal sidewalks, for the turnover of muck removal and Work machine, and steep slope topography section does not possess and parallelly up and down builds many sidewalk conditions, one is dangerous, and two is basic units that lower floor's sidewalk can hollow out upper strata sidewalk.Therefore, on steep slope topography there is a difficult problem for turnover foundation ditch sidewalk layout in deep pit digging.
Summary of the invention
The present invention is intended to solve the problem, and provides the construction method of a kind of practicality, efficiently steep slope topography place deep pit digging.
The technical scheme that the present invention solves the employing of its technical problem is:
A construction method for steep slope topography place deep pit digging, carry out in the steps below:
(1) need and site contour according to construction, reasonable Arrangement enters the main sidewalk of foundation structure construction, repair within the scope of foundation structure at main sidewalk, by sidewalk construction and excavation mode, adopt light shot within the scope of excavation of foundation pit, excavate out the collection quarrel platform of a suitable size;
(2) along on collection quarrel platform upper side edge slope aspect to top, design excavation of foundation pit slope, adopt light shot mode to excavate out one and slip quarrel passage from top, slope to collection quarrel platform;
(3) build to foundation ditch top one enters foundation ditch sidewalk for plant equipment by appropriate location, hillside;
(4) by excavation slope top from upper and successively to excavate downwards, the earthwork adopts hierarchical layered to excavate step by step, slope construction protection in time, and rock blasting adopts left and right framing to carry out;
(5) the foundation pit earth cubic meter of stone adopts excavator excavation, after excavator is entered by foundation ditch jacking, successively declines until when arriving muck removal passage absolute altitude place, withdrawn from by muck removal passage with excavation; By on the upside of foundation ditch, along slipping, quarrel is domatic slips to the collection quarrel platform in foundation ditch, fills tipping truck transported by the muck removal passage of foundation ditch by excavator.
Adopt the present invention of technique scheme, compared with prior art, its beneficial effect is:
The present invention only need arrange two sidewalks at the bottom of foundation ditch top and foundation ditch, and the sidewalk led in foundation ditch is expanded to a collection quarrel platform, and construction equipment is entered by eminence sidewalk, and low level sidewalk goes out foundation ditch; Press design grade stage excavation from top to bottom, utilize the quarrel passage that slips be shaped to slip quarrel to collection quarrel platform, then by collection quarrel platform muck removal, after excavator, hidden hole drilling are entered by foundation ditch jacking, with excavation successively decline until withdraw to during foundation structure pioneer road absolute altitude.The present invention is for the larger excavation of foundation pit of steep slope topography place slope height, the difficult problem that steep slope topography place cannot arrange many turnover foundation ditch sidewalks can be solved well, collection quarrel platform solves again excavation of foundation pit well must not from the domatic difficult problem be cut of slipping downwards, there is extraordinary compliance, great popularization under similar engineering condition.
Detailed description of the invention
Set forth the present invention further below in conjunction with embodiment, but embodiment does not form any restriction to the present invention.
What the present embodiment related to is span is the excavation of the abut foundation ditch of 416m stiff skeleton reinforced concrete arch bridge, and abut planar dimension 48mx24m, high 29m, be positioned on 58 degree of abrupt slopes, abut excavation of foundation pit height 94 meters, earth excavation amount 120,000 side.
Overall sequence of construction is: preparation of construction → plant equipment, material in place → construction line setting → construction foundation pit side slope gutter → by main sidewalk is extended to collection quarrel platform → from collection quarrel platform to foundation ditch top and repaiies and slip that quarrel groove → stage excavation from top to bottom → applying preventive works carries out slope protection → the work items inspection, examination → apply platform and catchwater within the scope of main arch seat, and circulation is until at the bottom of foundation ditch successively.
In line with the principle organizing construction of going along with sb. to guard him in advance, draining is excavated in advance, step by step, side slope protection is closelyed follow, guarantee is safe, concrete steps are as follows:
(1) according to the form of structure of site contour condition and abut, choose the sidewalk entering main arch seat, especially the absolute altitude entering sidewalk during abut is low as much as possible when not affecting abut structure construction in the future, to adopt tipping truck muck removal when excavating bottom foundation ditch, after reserving the absolute altitude of foundation ditch place sidewalk, carry out planning and designing to the vertical gradient of on-the-spot sidewalk, sidewalk adopts flat slope within the scope of 50-100 rice near near coal-mine as far as possible, to prevent vehicle slipping by slope near near coal-mine, there is security incident;
(2) sidewalk leading to foundation ditch top excavator and enter is chosen, consider to be mainly excavator, hammer drill near coal-mine top to what enter foundation ditch, therefore the slope requirement needed for excavator driving sidewalk can be built, the gradient can suitably suddenly a bit, to reduce workload, air compressor machine can nearby be deposited appropriate location, with high-pressure air hose to hammer drill air feed in foundation ditch;
(3) sidewalk entering main arch seat is extended to collection quarrel platform within the scope of excavation of foundation pit to massif side; Explosion when adopting sidewalk to excavate and excavation method, first sidewalk is drawn logical to foundation ditch far-end, recycle the passage fixed and be extended to collection quarrel platform to massif side, collection quarrel platform should make shape at the bottom of the bowl that outside is high, inner side is low, prevents the quarrel soil slipped from upper strata from routing up foundation ditch;
(4) the foundation ditch top that will be extended to collection quarrel platform to design foundation ditch top brush slope kerve, as slipping the passage of quarrel from top to lower floor.
(5) outside design foundation ditch top, twice passive protection net is established at 15 meters, interval, stone under interception flies accidentally, ensure the safety of operating personnel in foundation ditch, on the downside of foundation ditch, twice passive protection net is established at 15 meters, interval, stone under interception flies accidentally, ensures downside pedestrian and vehicle safety;
(6) in foundation ditch, bursting work adopts left and right framing blasting in groups operation, is beneficial to dodging of Work machine in foundation ditch, carries out necessary blocking protection before each bursting work to Work machine in foundation ditch.
The foregoing is only the better feasible embodiment of the present invention, not thereby limit to interest field of the present invention, the equivalence change that all utilizations description of the present invention is done, be all contained within interest field of the present invention.
Claims (1)
1. a construction method for steep slope topography place deep pit digging, is characterized in that, carries out in the steps below:
(1) need and site contour according to construction, reasonable Arrangement enters the main sidewalk of foundation structure construction, repair within the scope of foundation structure at main sidewalk, by sidewalk construction and excavation mode, adopt light shot within the scope of excavation of foundation pit, excavate out the collection quarrel platform of a suitable size;
(2) along on collection quarrel platform upper side edge slope aspect to top, design excavation of foundation pit slope, adopt light shot mode to excavate out one and slip quarrel passage from top, slope to collection quarrel platform;
(3) build to foundation ditch top one enters foundation ditch sidewalk for plant equipment by appropriate location, hillside;
(4) by excavation slope top from upper and successively to excavate downwards, the earthwork adopts hierarchical layered to excavate step by step, slope construction protection in time, and rock blasting adopts left and right framing to carry out;
(5) the foundation pit earth cubic meter of stone adopts excavator excavation, after excavator is entered by foundation ditch jacking, successively declines until when arriving muck removal passage absolute altitude place, withdrawn from by muck removal passage with excavation; By on the upside of foundation ditch, along slipping, quarrel is domatic slips to the collection quarrel platform in foundation ditch, fills tipping truck transported by the muck removal passage of foundation ditch by excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339905.6A CN105155547A (en) | 2015-06-18 | 2015-06-18 | Construction method for deep foundation pit excavation on steep slope terrain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510339905.6A CN105155547A (en) | 2015-06-18 | 2015-06-18 | Construction method for deep foundation pit excavation on steep slope terrain |
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| CN105155547A true CN105155547A (en) | 2015-12-16 |
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| CN201510339905.6A Pending CN105155547A (en) | 2015-06-18 | 2015-06-18 | Construction method for deep foundation pit excavation on steep slope terrain |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926631A (en) * | 2016-05-06 | 2016-09-07 | 中铁大桥局集团第五工程有限公司 | Construction method for excavating bridge foundation pit in steep rock surface |
| CN106595410A (en) * | 2016-12-24 | 2017-04-26 | 中铁十八局集团有限公司 | Deep foundation pit earth pressure controlled blasting method |
| CN106638658A (en) * | 2016-10-29 | 2017-05-10 | 中国十七冶集团有限公司 | Construction method for building road to foundation bottom of fan |
| CN108035359A (en) * | 2017-12-27 | 2018-05-15 | 中国电建集团中南勘测设计研究院有限公司 | A kind of slope excavating method |
| CN108385757A (en) * | 2018-05-27 | 2018-08-10 | 辽宁科技学院 | A kind of Extended chemotherapy excavation of foundation pit device |
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| JPS5677431A (en) * | 1979-11-26 | 1981-06-25 | Taisei Corp | Excavation work for steep slope |
| CN102691300A (en) * | 2012-04-18 | 2012-09-26 | 浙江省建工集团有限责任公司 | Construction method of foundation pit earthwork |
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2015
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5677431A (en) * | 1979-11-26 | 1981-06-25 | Taisei Corp | Excavation work for steep slope |
| CN102691300A (en) * | 2012-04-18 | 2012-09-26 | 浙江省建工集团有限责任公司 | Construction method of foundation pit earthwork |
Non-Patent Citations (2)
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| PXY720915: "陡坡地形深基坑爆破方案", 《百度文库》 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926631A (en) * | 2016-05-06 | 2016-09-07 | 中铁大桥局集团第五工程有限公司 | Construction method for excavating bridge foundation pit in steep rock surface |
| CN106638658A (en) * | 2016-10-29 | 2017-05-10 | 中国十七冶集团有限公司 | Construction method for building road to foundation bottom of fan |
| CN106595410A (en) * | 2016-12-24 | 2017-04-26 | 中铁十八局集团有限公司 | Deep foundation pit earth pressure controlled blasting method |
| CN108035359A (en) * | 2017-12-27 | 2018-05-15 | 中国电建集团中南勘测设计研究院有限公司 | A kind of slope excavating method |
| CN108385757A (en) * | 2018-05-27 | 2018-08-10 | 辽宁科技学院 | A kind of Extended chemotherapy excavation of foundation pit device |
| CN108385757B (en) * | 2018-05-27 | 2023-08-22 | 辽宁科技学院 | Excavation device for expanding foundation pit |
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Application publication date: 20151216 |
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