CN1190145A - Method for lowering level of ground water - Google Patents
Method for lowering level of ground water Download PDFInfo
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- CN1190145A CN1190145A CN97125870A CN97125870A CN1190145A CN 1190145 A CN1190145 A CN 1190145A CN 97125870 A CN97125870 A CN 97125870A CN 97125870 A CN97125870 A CN 97125870A CN 1190145 A CN1190145 A CN 1190145A
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- hole
- water
- dug underground
- water shutoff
- work plane
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Abstract
During construction of closed engineering, water sealing holes at certain angle to the engineering direction and horizontal water draining holes are drilled in the water bearing layer along with the progress of engineering. The present invention realize sectional water level lowering, beginning from vertical well or other entrance. It can drain ground water of various types effectively without the effect of water isolating layer and limit in depth.
Description
The invention belongs to construction work foundation dewatering technical field, be specifically related to a kind of method of ground descending water of project dug underground.
The place of project dug underground is in heavy traffic, bustling location that building is intensive basically, and except that the work vertical shaft and access of necessity, any construction is carried out in other position that should not be in ground.Reduce the groundwater table of project dug underground, what select at present is peupendicular hole point dewatering method, the precipitation well gathers around promptly on the project dug underground face of land, this does not conform to again with requiring with the purpose of tunneling, and the construction of this precipitation well and the later stage management of drawing water, have the road surface of destruction, block the traffic, shortcomings such as the existed building facility of need removing sometimes impact for city normal life order.In addition, project dug underground often runs into the underground water of various ways, as backwater, diving and artesian water, adopts single vertical well point technology can not reach three kinds of phreatic purposes of effective reduction simultaneously, stays potential safety hazard for follow-up earthwork construction.
The purpose of this invention is to provide under a kind of situation that does not take place, any ground, utilize the access of project dug underground, according to the method for the ground descending water of the progress segmentation of project dug underground, the leading precipitation of layering.
This underground precipitation method is achieved in that according to the aquifer of project dug underground work plane and the position of water barrier, avoid water barrier, begin to locate executing respectively with inner aquifer of work plane all around to the excavation area order and bore water shutoff hole and weep hole, the water shutoff hole around the project dug underground work plane in the aquifer to the radiation of project dug underground direction of advance, the direction that each water shutoff hole and project dug underground work plane advance has angle, weep hole is parallel with the project dug underground horizontal plane, the segmentation that closely cooperates of the progress of water shutoff hole and weep hole and project dug underground is carried out, after water shutoff hole and weep hole are drilled into design length, put into filter pipe, seal the slit between filter pipe and hole.
The aquifer is when the two side of project dug underground work plane, water shutoff hole horizontal different in size is arranged in the two side of project dug underground work plane, the direction in water shutoff hole becomes 0～15 ° angle with the horizontal direction that work plane advances, and weep hole is parallel with the project dug underground horizontal plane.
The aquifer is when the bottom of project dug underground work plane excavation scope, and the bottom before the tunneling work plane is excavated the foundation ditch that can operate drilling machine downwards, and the water shutoff hole is parallel with the project dug underground horizontal plane with weep hole.
The aquifer is when the top of project dug underground work plane, water shutoff hole different in size is arranged obliquely upward, the horizon of the direction in water shutoff hole and project dug underground work plane direction of advance has angle, vertical direction becomes 0～10 ° angle with horizon, horizontal direction becomes 0～15 ° angle with horizon, weep hole is parallel with the project dug underground horizontal plane.
The present invention has the following advantages:
1. the present invention is on ribbon or large span project dug underground work plane, the method that begins to carry out the leading precipitation of segmentation from vertical shaft or other access of project dug underground, closely cooperate with the progress of project dug underground, segmentation, layering are carried out, and need not take any place on ground;
2. the present invention avoids the influence of water barrier owing to use the bigger filter pipe of water inlet area directly to enter the aquifer, can effectively arrange various forms of underground water and fall, and dewatering effect is remarkable;
3. the present invention is specially adapted to the difficult large-engineering of realizing of peupendicular hole because precipitation depth is unrestricted, and social benefit and economic benefit are huge.
Embodiments of the invention are referring to following each figure
Fig. 1 a is the vertical view that peupendicular hole 1 and the tunnel excavation width on bored tunnel equates substantially
Fig. 1 b is the vertical view wideer than the tunnel of the peupendicular hole 2 on bored tunnel
Fig. 1 C is the vertical view in bored tunnel engineering peupendicular hole 3 offset from body tunnels
Fig. 1 d is for executing the vertical view that bores the precipitation hole site on bored tunnel
Fig. 2 a is the sectional view of Fig. 1 a
Fig. 2 b is the sectional view of Fig. 1 b
Fig. 2 c is the sectional view of Fig. 1 c
Fig. 3 is the enter the mouth horizontal precipitation pipe schematic diagram on tunneling major project section upper strata at 1 place of peupendicular hole
Fig. 4 is the enter the mouth horizontal precipitation pipe schematic diagram of tunneling major project section lower floor at 1 place of peupendicular hole
Fig. 5 is the enter the mouth horizontal precipitation pipe schematic diagram on upper strata, tunneling major project section left side at 2 places of peupendicular hole
Fig. 6 is the enter the mouth horizontal precipitation pipe schematic diagram of tunneling major project section left side lower floor at 2 places of peupendicular hole
Fig. 7 is the enter the mouth horizontal precipitation pipe schematic diagram on upper strata, tunneling major project section right side at 2 places of peupendicular hole
Fig. 8 is the enter the mouth horizontal precipitation pipe schematic diagram of tunneling major project section right side lower floor at 2 places of peupendicular hole
Fig. 9 be the A-A of Fig. 1 a to view, water shutoff hole the when access equates substantially with the tunnel cross-section width and weep hole distribution map
Figure 10 be the B-B of Fig. 1 b to view, water shutoff hole when the constructing tunnel section is wider than in the access and weep hole distribution map
Figure 11 is the enter the mouth horizontal precipitation pipe schematic diagram on tunneling major project Vomitory upper strata at 3 places of peupendicular hole
Figure 12 is that the C-C of Figure 11 is to view
Figure 13 is the enter the mouth horizontal precipitation pipe schematic diagram of tunneling major project Vomitory lower floor at 3 places of peupendicular hole
Figure 14 is the horizontal precipitation pipe schematic diagram on tunneling major project section upper strata
Figure 15 is the horizontal precipitation pipe schematic diagram of tunneling major project section lower floor
Among the figure:
1---peupendicular hole inlet 2---peupendicular hole inlet
3---peupendicular hole inlet 4---exit and entrance
The aquifer signal is gone up at 5---tunnel segment precipitation places 6---
7---following aquifer signal 8---foundation ditch
9---water shutoff hole 10---weep hole
11---aquifer 12---water barrier
1., 2., 3., 4., 5., 6., 7., 8., 9., 10. be precipitation hole numbering
Embodiment 1:
Shown in Fig. 1 peupendicular hole inlet 1, this peupendicular hole and tunnel major project point-blank and its width equate basically with tunnel width, so the water shutoff hole of both sides is all to external radiation one angle as shown in Figure 3,15 ° of upper strata radiation, 5 ° of lower floor's radiation, the design length difference in each hole, upper strata 1. number hole are the water shutoff hole, 2., 3. number hole is weep hole (water shutoff hole and weep hole are referred to as the precipitation hole).Five precipitation holes of lower floor wherein four for the water shutoff hole as shown in Figure 4 4., 5., 7., 8. number hole, centre 6. number hole is a weep hole, water shutoff hole and weep hole execute bore arrange and the position, aquifer as shown in Figure 9.
Embodiment 2:
As Fig. 1 is that peupendicular hole 2 left side precipitation pore size distribution situations are shown in Fig. 5,6, this peupendicular hole at the interlude of tunnel major project and point-blank and be wider than tunnel width, dotted line is a tunnel width among the figure, because the pinching of water barrier, the upper strata has only 1. number horizontal water shutoff hole.There are five precipitation holes in lower floor, wherein four are the water shutoff hole, in the both sides of being wider than the tunnel 2., 6. number water shutoff hole horizontal is arranged, 3., 5. number water shutoff hole is to 15 ° of both sides radiation and than 2., 6. number hole is short on the tunnel front, the middle weep hole that 4. number is arranged horizontally.
Embodiment 3:
This embodiment is that peupendicular hole 2 right side precipitation pore size distribution situations are shown in Fig. 7,8, because the pinching in the middle of the water barrier, following aquifer just is the last aquifer of embodiment 2, four water shutoff holes on last aquifer, have been designed, both sides 1., 4. number water shutoff hole horizontal is arranged, in 1. number inboard, water shutoff hole 2. number water shutoff hole horizontal to 15 ° of external radiations, the weep hole that 3. number is arranged horizontally.Lower floor is the water shutoff hole that is arranged horizontally, number hole 5..Water shutoff hole and weep hole execute bore to arrange and the position, aquifer as shown in figure 10.
Embodiment 4:
Shown in Fig. 1 peupendicular hole inlet 3, this peupendicular hole departs from the tunnel major project, link to each other with the main body construction of tunnel by exit and entrance 5, as Figure 11 is that peupendicular hole 3 aquifers are at channel roof water shutoff pore size distribution figure, the water shutoff hole is in the channel roof radiation, 1., 3. hole horizontal is to 10 ° of external radiations, 1., 2., 3. number hole in vertical direction all upwards 5 ° of radiation as shown in figure 12, the design length difference in each hole.There are four precipitation holes in lower floor, the both sides that wherein 4., 7. number are distributed in passage be the water shutoff hole horizontal to 5 ° of external radiations, the middle weep hole that 5., 6. number is arranged horizontally.
Embodiment 5:
Be illustrated in figure 1 as tunnel segment precipitation place 5, wherein the precipitation pore size distribution is shown in Figure 14,15, this major project aquifer, tunnel in the middle part in tunnel and its position, bottom as shown in figure 16,1., 3. the both sides, middle part number are the water shutoff hole, level is to 10 ° of external radiations, and 2. number weep hole horizontal arrangement is in the centre; Need to do in advance the foundation ditch 8 of an energy operant level rig when falling the water of bottom in the bottom, execute bore two bottom sides 4., 7. 10 ° of outside horizontal radiations in number water shutoff hole, 5., 6. number weep hole horizontal arrangement is in the bottom in tunnel.
The precipitation hole available horizontal rig of above embodiment and casing pipe hole forming method realize, promptly after water shutoff hole and weep hole are drilled into design length, puts into filter pipe, push away drill bit, take out sleeve pipe, seal the slit between filter pipe and hole, the maximum length in precipitation hole is by the performance decision of rig; Perhaps realize with horizontal drill and pipe jacking method.
Claims (4)
- One kind ground descending water method, it is characterized in that the step that realizes this method is: according to the aquifer of project dug underground work plane and the position of water barrier, avoid water barrier, begin to locate executing respectively with inner aquifer of work plane all around to the excavation area order and bore water shutoff hole and weep hole, the water shutoff hole around the project dug underground work plane in the aquifer to the radiation of project dug underground direction of advance, the direction that each water shutoff hole and project dug underground work plane advance has angle, weep hole is parallel with the project dug underground horizontal plane, the segmentation that closely cooperates of the progress of water shutoff hole and weep hole and project dug underground, layering is carried out, after water shutoff hole and weep hole are drilled into design length, seal the slit between filter pipe and hole.
- 2. the method for descending water according to claim 1ly, it is characterized in that the aquifer is when the sidewall of project dug underground work plane, water shutoff hole horizontal different in size is arranged in the two side of project dug underground work plane, the direction in water shutoff hole becomes 0～15 ° angle with the horizontal direction that work plane advances, and weep hole is parallel with the project dug underground horizontal plane.
- 3. the method for descending water according to claim 1ly, it is characterized in that the aquifer is when the bottom of project dug underground work plane, before the tunneling work plane to the bottom downwards excavation one can operate the foundation ditch of drilling machine, water shutoff hole, weep hole are parallel with the project dug underground horizontal plane.
- 4. the method for descending water according to claim 1ly, it is characterized in that the aquifer is when the top of project dug underground work plane, water shutoff hole different in size is arranged obliquely upward, the horizon of the direction in water shutoff hole and project dug underground work plane direction of advance has angle, vertical direction becomes 0～10 ° angle with horizon, horizontal direction becomes 0～15 ° angle with horizon, weep hole is parallel with the project dug underground horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97125870 CN1062621C (en) | 1997-12-26 | 1997-12-26 | Method for lowering level of ground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97125870 CN1062621C (en) | 1997-12-26 | 1997-12-26 | Method for lowering level of ground water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1190145A true CN1190145A (en) | 1998-08-12 |
| CN1062621C CN1062621C (en) | 2001-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97125870 Expired - Fee Related CN1062621C (en) | 1997-12-26 | 1997-12-26 | Method for lowering level of ground water |
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| Country | Link |
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| CN (1) | CN1062621C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452118A (en) * | 2013-03-22 | 2013-12-18 | 中国建筑股份有限公司上海分公司 | Foundation pit slope soil-nailing dewatering support construction method |
| CN107964971A (en) * | 2017-11-23 | 2018-04-27 | 北京地矿工程建设有限责任公司 | A kind of precipitation method of subway station using the construction of PBA engineering methods |
-
1997
- 1997-12-26 CN CN 97125870 patent/CN1062621C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452118A (en) * | 2013-03-22 | 2013-12-18 | 中国建筑股份有限公司上海分公司 | Foundation pit slope soil-nailing dewatering support construction method |
| CN103452118B (en) * | 2013-03-22 | 2015-10-14 | 中国建筑股份有限公司上海分公司 | A kind of excavation slope soil nailing de-watering and shoring construction method |
| CN107964971A (en) * | 2017-11-23 | 2018-04-27 | 北京地矿工程建设有限责任公司 | A kind of precipitation method of subway station using the construction of PBA engineering methods |
| CN107964971B (en) * | 2017-11-23 | 2019-11-22 | 北京地矿工程建设有限责任公司 | A kind of precipitation method of the subway station using the construction of PBA engineering method |
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| Publication number | Publication date |
|---|---|
| CN1062621C (en) | 2001-02-28 |
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