CN102644465B - Backfill construction method for vertical shaft cave - Google Patents
Backfill construction method for vertical shaft cave Download PDFInfo
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- CN102644465B CN102644465B CN201210146894.6A CN201210146894A CN102644465B CN 102644465 B CN102644465 B CN 102644465B CN 201210146894 A CN201210146894 A CN 201210146894A CN 102644465 B CN102644465 B CN 102644465B
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Abstract
The invention relates to a backfill construction method for a vertical shaft cave. The invention aims at providing a backfill construction method for the vertical shaft cave to reduce the construction difficulty and improve the engineering safety. The technical scheme adopted by the invention is that the method comprises the steps of: a, excavating a first layer of a vertical shaft on a selected position; b, punching a circle of a pipe roof to a karst cavity of the wall on a position of the bottom part of the first layer vertical shaft; c, clearing deposits inside the karst cavity of the first layer, and backfilling the karst cavity after being cleared with concrete by adopting the pipe roof as a bottom template; d, continuing to excavate the vertical shaft after completing the concrete backfilling to reach the stadium of the concrete, carrying out the construction for the karst cavity disclosed by a second layer according to the steps b and c after reaching the position of the bottom part of the second layer vertical shaft, and backfilling and grouting the top part of the lower concrete layer by utilizing an upper layer pipe roof; and e, repeating the step d until reaching the requirement of the vertical shaft depth. The backfill construction method is applicable to hydraulic and hydro-power engineering and is particularly applicable to the excavation of the vertical shaft in karst regions.
Description
Technical field
The present invention relates to a kind of vertical shaft solution cavity backfill and process construction method.Be applicable to Hydraulic and Hydro-Power Engineering, be particularly useful for can lava the excavation of area vertical shaft.
Background technology
For can lava the water conservancy project vertical shaft arranged of area, in the process of digging, run into unavoidably the Karst Features of vertically growing along hoistway wall under vertical shaft, this Karst Features is likely vertically grown and is reached tens meters of rice even up to a hundred along shaft wall.And water conservancy project vertical shaft has the hydraulic tunnel of pressure often, generally adopt steel concrete or steel pipe as lining cutting, this just requires to grow and must adopt concrete backfill closely knit at the karst cavity of the borehole wall.
But above-mentioned Karst Features has caused larger constructional difficulties to backfilling working, especially filling or half filling-type Karst cave, anti-in order to obtain enough country rock bullets, the charges in karst cavity must be cleaned out, adopt concrete replacement.The backfill processing of karst has become comparatively crucial problem opportunity, if process the difficulty of construction of the Lingao borehole wall of meeting after karst is disclosed completely again; If shaft excavation one deck karst cavity that this layer of backfill exposed immediately,, along with vertical shaft digs under further, karst also further discloses, when lower floor's Karst Features is carried out to deposit cleaning, can cause coming to nothing of last layer fill concrete basis, thereby cause unstability to cause accident.
Summary of the invention
The technical problem to be solved in the present invention is: for the problem of above-mentioned existence, provide the low vertical shaft solution cavity backfill of a kind of easy construction, engineering cost to process construction method, reduce difficulty of construction, improve engineering safety.
The technical solution adopted in the present invention is: one can the vertical shaft solution cavity backfill of lava area be processed construction method, it is characterized in that comprising the following steps:
A, at the first floor of select location excavating shaft;
B, in first floor silo bottom position, enclose pipe canopy toward the karst cavity injection one of the borehole wall, pipe canopy is until in country rock, the steel pipe close-packed arrays of pipe canopy, has the place concrete in space or cement mortar to stop up;
Deposit in c, cleaning first floor karst cavity, and using pipe canopy as bottom template, adopt from the bottom up concrete to carry out backfill to the karst cavity after clearing up;
D, complete and reach after the age of concrete when concrete backfill, continue excavating shaft, arrive second layer silo bottom position, the karst cavity that the second layer is disclosed is constructed by step b, c, then utilizes the pipe canopy on upper strata to carry out backfill grouting to lower-layer concrete top;
E, repeating step d, until the vertical shaft degree of depth meets the demands.
The backfill of described concrete individual layer is highly not more than 3m.
Arrange that in pipe canopy bottom transverse anchor pole is as support.
The invention has the beneficial effects as follows: can facilitate, the karst cavity to the karst of vertically growing along shaft wall of safety carries out backfill processing, reduce karst has all been disclosed to the difficulty of construction that processing processes again, avoided carrying out without bottom template the construction risk of karst cavity backfill.Later-stage utilization pipe canopy carries out backfill grouting and has ensured the sold stowing in levels fill concrete gap.
Brief description of the drawings
Fig. 1 is construction schematic diagram of the present invention.
Detailed description of the invention
As shown in Figure 1, the present embodiment has excavation at vertical shaft 1 that can lava area, this vertical shaft is that stage excavation forms, the cutting depth of every layer is 3～5m, in the karst cavity 2 of every layer of bottom position, be furnished with a comb canopy 3, between the steel pipe of requirement pipe canopy 3, be closely connected (as there being space can adopt concrete or cement mortar to stop up between pipe canopy), taking pipe canopy 3 as bottom template, in karst cavity, back-filling in layers has concrete.
The detailed description of the invention of the present embodiment is as follows:
A, can lava the first floor of area select location excavating shaft 1;
B, dig in process for 1 time at vertical shaft, the karst cavity 2 of the borehole wall also ceaselessly discloses thereupon, when disclosing to (3～5m) after certain height, arranges a comb canopy 3 in karst cavity 2 bottoms of having exposed, and pipe canopy is until in country rock;
C, cleaning have disclosed to obtain the deposit in karst cavity 2, and pipe canopy 3 is as the bottom template of karst cavity backfill displacement, the concrete backfill of the employing from the bottom up karst cavity of layering;
D, concrete backfill complete and reach after the age of concrete, continue excavating shaft 1 second layer, the karst cavity 2 of exposure is carried out to construction processing by step b, c mode, utilize the pipe canopy 3 on upper strata to carry out backfill grouting to lower-layer concrete top, the space between the upper and lower both sides of filling concrete that can be closely knit.
E, repeating step d, until vertical shaft 1 degree of depth meets the demands, can be easily to the Karst Features backfill processing of vertically growing along vertical shaft 1 borehole wall.
Verifying after the roughly situation of vertical shaft 1 borehole wall karst growth, according to pipe canopy 3 load bearing requirements and the overall individual layer backfill height of considering to determine vertical shaft karst cavity of construction condition, if individual layer backfill highly should not be greater than 3m(pipe canopy, 3 loads are larger, can arrange that anchor pole is as supporting in pipe canopy 3 bottom transverse).
Claims (3)
1. can the vertical shaft solution cavity backfill of lava area process a construction method, it is characterized in that comprising the following steps:
A, at the first floor of select location excavating shaft (1);
B, in first floor silo bottom position, enclose pipe canopy (3) toward karst cavity (2) injection one of the borehole wall, pipe canopy is until in country rock, the steel pipe close-packed arrays of pipe canopy, has the place concrete in space or cement mortar to stop up;
Deposit in c, cleaning first floor karst cavity (2), and using pipe canopy (3) as bottom template, adopt from the bottom up concrete to carry out backfill to the karst cavity (2) after clearing up;
D, complete and reach after the age of concrete when concrete backfill, continue excavating shaft (1), arrive second layer silo bottom position, the karst cavity (2) that the second layer is disclosed is constructed by step b, c, then utilizes the pipe canopy (3) on upper strata to carry out backfill grouting to lower-layer concrete top;
E, repeating step d, until vertical shaft (1) degree of depth meets the demands.
2. construction method according to claim 1, is characterized in that: the backfill of described concrete individual layer is highly not more than 3m.
3. construction method according to claim 1, is characterized in that: arrange that in Guan Peng (3) bottom transverse anchor pole is as support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210146894.6A CN102644465B (en) | 2012-05-14 | 2012-05-14 | Backfill construction method for vertical shaft cave |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210146894.6A CN102644465B (en) | 2012-05-14 | 2012-05-14 | Backfill construction method for vertical shaft cave |
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| CN102644465A CN102644465A (en) | 2012-08-22 |
| CN102644465B true CN102644465B (en) | 2014-06-25 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102877850B (en) * | 2012-10-17 | 2014-12-10 | 中国水电顾问集团华东勘测设计研究院 | Construction method of weak structural surface displacement of grotto surrounding rocks of underground power plant |
| CN106368709B (en) * | 2016-09-30 | 2019-04-23 | 首钢集团有限公司 | A kind of construction method of vertical |
| CN109882205B (en) * | 2019-03-28 | 2024-01-19 | 中铁二院工程集团有限责任公司 | Suspension backfill structure penetrating through large filling-free karst cave tunnel and construction method |
Citations (2)
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|---|---|---|---|---|
| CN101397909B (en) * | 2008-09-17 | 2011-04-20 | 中冶集团武勘岩土基础工程公司 | Artificial digging repair novel construction method for collapse ultra-deep shaft |
| CN102305075A (en) * | 2011-06-28 | 2012-01-04 | 中国水利水电第五工程局有限公司 | Vertical shaft construction method under unfavorable geological condition |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4452170B2 (en) * | 2004-12-17 | 2010-04-21 | 株式会社ピーエス三菱 | Construction method of shaft |
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2012
- 2012-05-14 CN CN201210146894.6A patent/CN102644465B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397909B (en) * | 2008-09-17 | 2011-04-20 | 中冶集团武勘岩土基础工程公司 | Artificial digging repair novel construction method for collapse ultra-deep shaft |
| CN102305075A (en) * | 2011-06-28 | 2012-01-04 | 中国水利水电第五工程局有限公司 | Vertical shaft construction method under unfavorable geological condition |
Non-Patent Citations (8)
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| 大董岭隧道洞内特大溶洞回填方案探讨;钟云建等;《公路交通技术》;20100630(第3期);108-111 * |
| 张景华.牛角坪隧道左线溶洞处理施工.《铁道建筑技术》.2009,(第11期),86-88. |
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| 溶洞地质条件下钻孔灌注桩的施工技术;高成民;《铁道建筑》;20030220(第2期);11-12 * |
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