CN204492825U - A kind of contractible joint of freezing wells with high strength RC - Google Patents
A kind of contractible joint of freezing wells with high strength RC Download PDFInfo
- Publication number
- CN204492825U CN204492825U CN201420815280.7U CN201420815280U CN204492825U CN 204492825 U CN204492825 U CN 204492825U CN 201420815280 U CN201420815280 U CN 201420815280U CN 204492825 U CN204492825 U CN 204492825U
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- CN
- China
- Prior art keywords
- riser
- annular
- inner ring
- high strength
- borehole wall
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of contractible joint of freezing wells with high strength RC, comprise inner ring riser, multiple radial rib plate, upper flange and lower flange between annular riser and inner ring riser that annular riser in outside is coaxial with described annular riser; Described inner ring riser is set within annular riser, radial rib plate along the radial distribution of freezing wells with high strength RC in the annular space that annular riser and the clamping of inner ring riser are formed, the top that upper flange and lower flange are arranged at annular riser respectively with bottom for being connected the upper and lower concrete structure borehole wall.The utility model is safe and reliable, but also economical rationality not only; Vertical surrender supporting capacity has certain threshold, and its value can be greater than covers borehole wall deadweight and other working load sums, and is less than the concrete vertical bearing capacity of the borehole wall; There is larger vertical compression ratio, the requirement that total compression amount and stratum settlement amount adapt can be met, prevent shaft lining breakage.
Description
Technical field
The utility model relates to a kind of mine borehole wall joint, in particular a kind of contractible joint of freezing wells with high strength RC.
Background technology
In recent years, in succession there occurs multiple coal mine shaft lining pit shaft break accident in mining area, be mainly the pit shaft of construction freezing method.Existing achievement in research shows: the main cause of these well shaft destroyed is because the bottom aquifer in these mining areas directly overlays on coal measure strata, along with the carrying out of mine construction and production, the water level showing native aquifer declines gradually, in addition the thaw collapse of frost wall, in the soil body, effective stress increases gradually, thus cause soil consolidation sedimentation around pit shaft, be applied to the sizable downward vertical spectra (being also called the negative skin friction of pile) of one, pit shaft, the vertical load that pit shaft is subject to strengthens, because China's past had not recognized the vertical spectra problem of this special formation in Shaft wall design, with the sedimentation of landing surface, vertical spectra increases gradually, the borehole wall is finally caused to destroy because of strength deficiency.
In shaft wall structure design, except the water of consideration stratum horizontal direction, earth lateral pressure, also should consider the vertical spectra effect that stratum settlement causes.
In shaft wall structure design, for reducing or avoiding the shaft lining breakage that causes due to vertical spectra effect, two kinds of thinkings can be taked: one is the way adopting " resist ", namely strengthen thickness of shaft wall or raising strength grade of concrete; Two is the ways adopting " allowing ", namely arranges contractible joint in the vertical appropriate location of the borehole wall.When acting on the vertical spectra on the borehole wall and reaching certain value, contractible joint just produces compressive strain, the vertical stress accumulated in the borehole wall is released, thus can prevents shaft lining breakage.Because vertical spectra is very huge, obviously, the method for " resisting " is adopted to be difficult to technically realize, and also unreasonable economically.So, vertically retractable shaft wall structure should be adopted.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of contractible joint of freezing wells with high strength RC, in order to improve the safety of mine.
The utility model is achieved through the following technical solutions, and the utility model comprises annular riser in outside inner ring riser, multiple radial rib plate, upper flange and the lower flange annular riser and inner ring riser between coaxial with described annular riser; Described inner ring riser is set within annular riser, radial rib plate along the radial distribution of freezing wells with high strength RC in the annular space that annular riser and the clamping of inner ring riser are formed, the top that upper flange and lower flange are arranged at annular riser respectively with bottom for being connected the upper and lower concrete structure borehole wall.
As one of preferred embodiment of the present utility model, described upper flange and lower flange are flat flange.
As one of preferred embodiment of the present utility model, described joint adopts Q235 steel to make.
The utility model has the following advantages compared to existing technology: the utility model is safe and reliable, but also economical rationality not only; Vertical surrender supporting capacity has certain threshold, and its value can be greater than covers borehole wall deadweight and other working load sums, and is less than the concrete vertical bearing capacity of the borehole wall; There is larger vertical compression ratio, the requirement that total compression amount and stratum settlement amount adapt can be met, prevent shaft lining breakage; Design side direction water, soil pressure can be born in the horizontal direction; After vertical generation yield deformation, still there is good waterproof leakproof and antiseptic power; Be convenient to make and installation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the sectional view of Fig. 1.
Detailed description of the invention
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
As depicted in figs. 1 and 2, the present embodiment comprises annular riser 1 in outside inner ring riser 2, multiple radial rib plate 3, upper flange 4 and the lower flange 5 annular riser 1 and inner ring riser 2 between coaxial with described annular riser 1; Described inner ring riser 2 is set within annular riser 1, radial rib plate 3 clamps in the annular space that formed along the radial distribution of freezing wells with high strength RC in annular riser 1 and inner ring riser 2, the top that upper flange 4 and lower flange 5 are arranged at annular riser 1 respectively with bottom for being connected the upper and lower concrete structure borehole wall.Upper flange 4 and lower flange 5 are flat flange.The joint of the present embodiment adopts Q235 steel to make.
The annular riser 1 in outside, except bearing vertical load and doing, also will play waterproof, the effect of water resistant, soil pressure; Radial rib plate 3 bears vertical load equally, but it plays and prevents annular riser 1 suddenly flexing unstability, to improve the effect that whole joint resists water, soil pressure ability in the horizontal direction; Upper flange 4 and the plate armature of lower flange 5 are convenient to be connected with the upper and lower concrete structure borehole wall.When the joint location borehole wall bear vertical load reach the critical load of joint time, joint produce yield deformation, release the borehole wall in vertical stress.
Claims (3)
1. a contractible joint for freezing wells with high strength RC, is characterized in that, comprises inner ring riser, multiple radial rib plate, upper flange and lower flange between annular riser and inner ring riser that annular riser in outside is coaxial with described annular riser; Described inner ring riser is set within annular riser, radial rib plate along the radial distribution of freezing wells with high strength RC in the annular space that annular riser and the clamping of inner ring riser are formed, the top that upper flange and lower flange are arranged at annular riser respectively with bottom for being connected the upper and lower concrete structure borehole wall.
2. the contractible joint of a kind of freezing wells with high strength RC according to claim 1, is characterized in that, described upper flange and lower flange are flat flange.
3. the contractible joint of a kind of freezing wells with high strength RC according to claim 1, is characterized in that, described joint adopts Q235 steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420815280.7U CN204492825U (en) | 2014-12-12 | 2014-12-12 | A kind of contractible joint of freezing wells with high strength RC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420815280.7U CN204492825U (en) | 2014-12-12 | 2014-12-12 | A kind of contractible joint of freezing wells with high strength RC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204492825U true CN204492825U (en) | 2015-07-22 |
Family
ID=53572149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420815280.7U Expired - Fee Related CN204492825U (en) | 2014-12-12 | 2014-12-12 | A kind of contractible joint of freezing wells with high strength RC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204492825U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500074A (en) * | 2014-12-12 | 2015-04-08 | 安徽恒源煤电股份有限公司 | Flexible connector of freezing well |
| CN106894820A (en) * | 2017-01-17 | 2017-06-27 | 中国矿业大学 | A kind of waterproof well wall retractable device and its construction technology |
-
2014
- 2014-12-12 CN CN201420815280.7U patent/CN204492825U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500074A (en) * | 2014-12-12 | 2015-04-08 | 安徽恒源煤电股份有限公司 | Flexible connector of freezing well |
| CN106894820A (en) * | 2017-01-17 | 2017-06-27 | 中国矿业大学 | A kind of waterproof well wall retractable device and its construction technology |
| CN106894820B (en) * | 2017-01-17 | 2019-02-22 | 中国矿业大学 | A kind of waterproof well wall retractable device and its construction technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20151212 |
|
| EXPY | Termination of patent right or utility model |