CN103133004B - Technological process of ground prefabrication and installation of inner shaft wall of freezing shaft - Google Patents
Technological process of ground prefabrication and installation of inner shaft wall of freezing shaft Download PDFInfo
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- CN103133004B CN103133004B CN201310029732.9A CN201310029732A CN103133004B CN 103133004 B CN103133004 B CN 103133004B CN 201310029732 A CN201310029732 A CN 201310029732A CN 103133004 B CN103133004 B CN 103133004B
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Abstract
A technological process of ground prefabrication and installation of an inner shaft wall of a freezing shaft comprises the following steps of performing prefabrication of a shaft wall; prefabricating the inner shaft wall on the ground at the same time of shaft excavation; performing installation of the shaft wall; performing welding assembly on annular U-section steel and rebar in a shaft wall body to enable the shaft wall body to form an integral structure after achieving prefabrication of the inner shaft wall; sinking the shaft wall; injecting counterweight liquid to a shaft after achieving masonry of an outer wall of the shaft to enable the prefabricated inner shaft wall to be slowly sunk and control the suspension height of the inner shaft wall in the counterweight liquid; installing the next section of the shaft wall and performing alignment when performing the installation of the shaft wall; performing welding after the alignment; performing wall backfilling; filling grouting in annular space between an inner wall and the outer wall into a plurality of stage heights from bottom to top; and performing consolidation to achieve shaft-forming. The technological process of the ground prefabrication and installation of the inner shaft wall of the freezing shaft has the advantages of reducing construction costs, saving construction time, speeding up the shaft-forming and guaranteeing the safety and reliability of the construction process.
Description
Technical field
The present invention relates in mine working construction and adopt the technical field of the construction freezing method pit shaft borehole wall, particularly relate to the prefabricated and mounting process method in borehole wall ground in the freezing shaft in a kind of mine vertical shaft.
Background technology
Shaft of vertical well is the throat thoroughfare of mine, and in order to ensure safety, the borehole wall must can resist the effect of hydraulic pressure and stratum deformation pressure, and will have good water shutoff performance.
At present except external minority freezing shaft, both at home and abroad in the construction of the pit shaft borehole wall, a kind of mode is the two-layer compound borehole wall adopting band plastic sandwich, this existing two-layer compound borehole wall comprises inside and outside two-layer, for the formation condition determined, the clean diameter of pit shaft and buried depth, the principal element affecting inner layer well wall thickness is shaft wall structure form and the intensity of building wall material.At the freezing shaft being 1000m for clean diameter 12m, buried depth, even if adopt C100 concrete to build wall, inner wall thickness also will more than 2.7m.Therefore, this two-layer compound borehole wall will need blocked up inner layer well wall, not only result in high pick and builds expense, the more important thing is and will face serious massive concrete temperature cracks problem.Inner layer well wall is once because of temperature deformation cracking, and its water shutoff performance is difficult to be protected.Therefore, how rationally reducing inner layer well wall thickness is one of crucial problem faced in freezing shaft construction.
A kind of mode is also had to be pass through freeze-wellboring, this method is pressed and waterproof with have employed the opposing of double_layer steel concrete wall structure, its inner layer well wall thickness designs according to hydrostatic pressure, outer shaft wall designs according to pressure of freezing wall, the overall borehole wall is checked according to Water And Earth Pressures, with due regard to negative skin friction of pile effect in design process.In the method, outer shaft wall thickness is generally 400 ~ 600mm, inner layer well wall thickness is generally 500 ~ 1000mm, the thickness of shaft wall of different depth is different, corresponding strength grade of concrete and arrangement of reinforcement are also different, along with the degree of depth increases, concrete strength grade improves, and bar gauge also increases gradually.
Except double-layer wall of well structure, domestic have indivedual freezing shaft also to adopt single layer well wall structure to solve the problem that double-layer wall of well is blocked up, the driving duration is longer.Its Construction Principle is similar to tubbing, and difference is that its borehole wall primary structure is still concrete material, only adopts steel work Flange joint at the high borehole wall joining place of different section, and the borehole wall is shaping piecemeal in pick block process, finally carries out grouting behind shaft or drift lining, does not carry out jacket wall.Although this shaft wall structure is still comparatively thick and heavy in pit shaft deep, relatively double-layer wall of well form of structure, its advantage in the duration comparatively double-layer wall of well is large.Its weak point is that single layer well wall safety in use and water resistance exist hidden danger.
In summary, current freezing shaft wall many employings double-layer wall of well structure design, there is thickness of shaft wall excessive, the defect that construction cost is higher, and internal layer jacket wall is after the bottom of a pan construction terminates, the operation of synchronously carrying out in construction works is needed according to the high assembling reinforcement of section and pouring concrete etc., consuming time partially long.
For this reason, designer of the present invention is because above-mentioned defect, and by concentrating on studies and designing, comprehensive experience and the achievement being engaged in related industry for a long time for many years, research and design goes out the prefabricated and mounting process method in borehole wall ground in a kind of freezing shaft, to overcome above-mentioned defect.
Summary of the invention
The object of the present invention is to provide the prefabricated and mounting process method in borehole wall ground in a kind of freezing shaft, reduce construction cost, save the engineering time, accelerate Completed advance rate, and ensure work progress safety, reliable.
For achieving the above object, the invention discloses a kind of prefabricated and mounting process method in freezing shaft inner layer well wall ground, comprise following steps:
1. the borehole wall is prefabricated: while shaft excavation, on the ground prefabricated inner layer well wall;
2. the borehole wall install: inner layer well wall is prefabricated complete after, reinforcing bar in U-shaped for annular steel and borehole wall body is carried out assemble welding, U-shaped steel and body is become one structure;
3. sink the borehole wall: after pit shaft outer wall is built by laying bricks or stones, injects counterweight liquid in well, and prefabricated inner layer well wall is slowly sunk, and control its hoverheight in counterweight liquid, installs next joint borehole wall, carry out centering, weld after centering when the borehole wall is installed;
4. support with backfilling: to the Filling of Annulus Space slip casting between inwall and outer wall, from bottom to top divides some sections high to carry out, is then consolidated into well.
Wherein, in borehole wall prefabrication step, the described borehole wall is reinforced concrete shaft lining or composite shaft lining of inner steel cylinder, and the making borehole wall is that the basis on the ground after levelling makes section by section.
By above-mentioned process, present invention achieves following technique effect:
1, by changing inner layer well wall computational methods, inwall is thinning, can greatly thinning inner wall thickness, reduce costs.
2, by ground prefabricated lining, can not retrain by Shaft Excavation and outer shaft wall construction period, accelerate Completed advance rate.
3, the prefabricated inner layer well wall in ground, better can ensure the quality of prefabricated lining, reduces silo operating time, constructs reliably safer;
4, utilize the ground prefabrication and assembly construction technique of inner layer well wall, visual development of freezing stops freezing early, reduces the consumption of energy, cost-saving.。
The present invention will be further described in detail by the following specific embodiments, and will be more apparent and obvious to understand further combined with the description of the drawings.
Accompanying drawing explanation
Fig. 1 shows the inner layer well wall structural representation adopted in the present invention.
Detailed description of the invention
Prefabricated and the mounting process method in freezing shaft inner layer well wall ground of the present invention mainly comprises following steps:
1. the borehole wall is prefabricated: while shaft excavation, on the ground prefabricated inner layer well wall, and in borehole wall prefabrication step, the described borehole wall is reinforced concrete shaft lining or composite shaft lining of inner steel cylinder, and the making borehole wall is that the basis on the ground after levelling makes section by section;
2. the borehole wall install: inner layer well wall is prefabricated complete after, reinforcing bar in U-shaped for annular steel and borehole wall body is carried out assemble welding, U-shaped steel and body is become one structure;
3. sink the borehole wall: after pit shaft outer wall is built by laying bricks or stones, injects counterweight liquid in well, and prefabricated inner layer well wall is slowly sunk, and can control its hoverheight in counterweight liquid, installs next joint borehole wall.The borehole wall carries out centering when installing in time, and weld after centering, wall submersion carries out righting on earth afterwards, by suitable for reading fixing after qualified.The antifreezing measures of counterweight liquid to be carried out simultaneously, such as in suspension, add a certain amount of antifreeze, antifreeze according to temperature inside outer shaft wall;
4. support with backfilling: to the Filling of Annulus Space slip casting between inwall and outer wall, from bottom to top divides some sections high to carry out, is then consolidated into well.
See Fig. 1, show the specific embodiment that inner layer well wall of the present invention is reinforced concrete shaft lining.
This borehole wall comprises junction plate 1 and the inwall body 5 at two ends, this inwall body is circle-shaped, two ends are U-shaped steel 2, between U-shaped steel 2, be connected with vertical reinforcement 4, this vertical reinforcement 4 circumferentially arranges, and many circumferential reinforcements 3 arrange around this vertical reinforcement 4, concrete is filled with around reinforcing bar, thus, formed by many reinforcing bars and arrange in length and breadth, strengthen the Rigidity and strength of the borehole wall.
Beneficial effect of the present invention mainly contains:
1, by changing inner layer well wall computational methods, inwall is thinning, can greatly thinning inner wall thickness, reduce costs.
2, by ground prefabricated lining, can not retrain by Shaft Excavation and outer shaft wall construction period, accelerate Completed advance rate.
3, the prefabricated inner layer well wall in ground, better can ensure the quality of prefabricated lining, reduces silo operating time, constructs reliably safer;
4, utilize the ground prefabrication and assembly construction technique of inner layer well wall, visual development of freezing stops freezing early, reduces the consumption of energy, cost-saving.
It is evident that, above description and record be only citing instead of in order to limit disclosure of the present invention, application or use.Although described in an embodiment and be described in the drawings embodiment, but the present invention do not limit by accompanying drawing example and describe in an embodiment as the optimal mode thought at present to implement the specific examples of instruction of the present invention, scope of the present invention will comprise any embodiment of manual and the appended claim fallen into above.
Claims (2)
1. the prefabricated and mounting process method in freezing shaft inner layer well wall ground, comprises following steps:
1. the borehole wall is prefabricated: while shaft excavation, on the ground prefabricated inner layer well wall;
2. the borehole wall install: inner layer well wall is prefabricated complete after, reinforcing bar in U-shaped for annular steel and borehole wall body is carried out assemble welding, U-shaped steel and body are become one structure, and the described borehole wall comprises junction plate and the inwall body at two ends, and this inwall body is circle-shaped, two ends are U-shaped steel, between U-shaped steel, be connected with vertical reinforcement, many circumferential reinforcements arrange around this vertical reinforcement, are filled with concrete around reinforcing bar, formed by many reinforcing bars and arrange in length and breadth, strengthen the Rigidity and strength of the borehole wall;
3. sink the borehole wall: after pit shaft outer wall is built by laying bricks or stones, injects counterweight liquid in well, and prefabricated inner layer well wall is slowly sunk, and control its hoverheight in counterweight liquid, installs next joint borehole wall, carry out centering, weld after centering when the borehole wall is installed;
4. support with backfilling: to the Filling of Annulus Space slip casting between inwall and outer wall, from bottom to top divides some sections high to carry out, is then consolidated into well.
2. the prefabricated and mounting process method in freezing shaft inner layer well wall ground as claimed in claim 1, it is characterized in that, in borehole wall prefabrication step, the described borehole wall is reinforced concrete shaft lining or composite shaft lining of inner steel cylinder, and the making borehole wall is that the basis on the ground after levelling makes section by section.
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| CN201310029732.9A CN103133004B (en) | 2013-01-25 | 2013-01-25 | Technological process of ground prefabrication and installation of inner shaft wall of freezing shaft |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103924978B (en) * | 2014-04-25 | 2015-11-18 | 淮南久诺矿用设备加工有限公司 | The construction method of freeze-wellboring inner layer well wall |
| CN104948193B (en) * | 2015-06-24 | 2017-04-05 | 内蒙古伊泰广联煤化有限责任公司 | Freezing shaft inner layer well wall concrete foam curing means |
| CN105134219B (en) * | 2015-08-12 | 2017-08-25 | 北京中煤矿山工程有限公司 | Soft rock strata freezing shaft borehole wall construction technology |
| CN108035335B (en) * | 2017-09-30 | 2019-12-20 | 中煤第五建设有限公司 | Method for constructing shaft type underground parking garage by freezing method |
| CN109025908A (en) * | 2018-08-08 | 2018-12-18 | 中国恩菲工程技术有限公司 | Anti-corrosion drilling shaft lining for salt mine |
| CN113586060A (en) * | 2021-08-27 | 2021-11-02 | 中煤西安设计工程有限责任公司 | Construction method for freezing common tunneling prefabricated well wall support |
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| CN101818644A (en) * | 2010-05-14 | 2010-09-01 | 北京中煤矿山工程有限公司 | Well digging process of mining vertical shaft by adopting one-drilling well completion and well drilling method |
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| US4133472A (en) * | 1977-02-14 | 1979-01-09 | Maxwell Herris M | Method of shipping and assembling rectangular structural unit |
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| JP2000320287A (en) * | 1999-05-11 | 2000-11-21 | Nippon Steel Metal Prod Co Ltd | Earth retaining structure of rectangular shaft making use of liner plate |
| CN100587170C (en) * | 2008-05-23 | 2010-02-03 | 上海广联建设发展有限公司 | Construction method for barrel type underground garage |
| CN101858218B (en) * | 2010-05-14 | 2013-04-03 | 淮北矿业（集团）有限责任公司 | Shaft sinking process for expansion well completion of mine vertical shaft with boring method |
| CN102392647B (en) * | 2011-10-18 | 2013-07-10 | 中煤矿山建设集团有限责任公司 | Intermediate support device for ultra-deep drilling borehole |
| CN102493809A (en) * | 2011-12-12 | 2012-06-13 | 北京中煤矿山工程有限公司 | Comprehensive shaft sinking method of positive and raising boring for vertical shaft |
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| CN101818644A (en) * | 2010-05-14 | 2010-09-01 | 北京中煤矿山工程有限公司 | Well digging process of mining vertical shaft by adopting one-drilling well completion and well drilling method |
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| 冻结井高强钢筋混凝土预制弧板井壁试验研究;程烨等;《煤炭学报》;20041030;第29卷(第5期);第554-558页 * |
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