CN112982459A - Large-area drainage construction method for strongly weathered rock substrate rich in low-pressure-bearing fracture water - Google Patents
Large-area drainage construction method for strongly weathered rock substrate rich in low-pressure-bearing fracture water Download PDFInfo
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- CN112982459A CN112982459A CN202110265248.0A CN202110265248A CN112982459A CN 112982459 A CN112982459 A CN 112982459A CN 202110265248 A CN202110265248 A CN 202110265248A CN 112982459 A CN112982459 A CN 112982459A
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- post
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- cast strip
- foundation pit
- excavating
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 title claims abstract description 16
- 239000000758 substrate Substances 0.000 title claims description 8
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000002955 isolation Methods 0.000 claims description 11
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 101150054854 POU1F1 gene Proteins 0.000 description 10
- 239000004576 sand Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
Abstract
The invention relates to the technical field of constructional engineering, in particular to a large-area drainage construction method for a strongly weathered rock basement rich in low-pressure fracture water. The method comprises the following steps: excavating the foundation pit to a designed elevation; excavating a post-cast strip and a plurality of drainage ditches in the foundation pit according to a design drawing; according to a design drawing, burying a water guide pipe, arranging a water collecting pit and guiding fracture water into the water collecting pit; the method has the advantages that the special treatment of the fracture water is not needed, the fracture water is not needed to be blocked, only the fracture water is needed to be drained in an organized manner, the method is convenient to operate, simple and practical, the surface of the foundation pit can be dried in time, the cushion can be constructed after the foundation pit is cleaned up, the effect of treating the fracture water in a large area is very obvious, the subsequent cushion construction is not influenced, and the normal construction can be ensured.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a large-area drainage construction method for a strongly weathered rock basement rich in low-pressure fracture water.
Background
The impermeable foundation is a common geology in building construction and is mostly in the form of a rock foundation; in the process of earth excavation in a construction project, if strong weathering rocks rich in low-pressure-bearing fracture water are encountered, rock mud can be formed by mixing with water after the rocks are weathered, great potential hazards are formed on the safety of foundation pits and building foundations, only the fracture water is sealed and compacted firstly, and cushion construction can be carried out after the rock mud is dried and cleaned; therefore, the construction period is greatly influenced, the success of plugging of fractured water is not clear, the time needed is not known, and how to better dredge scattered fractured water in the foundation is a technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to solve the problems, and provides a large-area drainage construction method for a strongly weathered rock basement rich in low-pressure-bearing fracture water, which is convenient to operate, simple and practical, can dry the surface of a foundation pit in time, has a very obvious effect on treating the fracture water in a large area, and can ensure that the construction is normally carried out.
The invention solves the problems and adopts the technical scheme that:
a strongly weathered rock substrate large-area drainage construction method rich in low-pressure-bearing fracture water comprises the following steps:
s1, excavating a foundation pit, and excavating the foundation pit to a designed elevation;
wherein, step S1 includes:
s1a, carrying out site paying-off positioning, and measuring paying-off positioning in a preset area according to a design drawing;
s1b, excavating a foundation pit, and excavating the foundation pit to a designed elevation according to the position of the line;
s2, excavating a post-cast strip and a plurality of drainage ditches in the foundation pit according to a design drawing;
wherein, step S2 includes:
s2a, releasing a position line of the post-cast strip in the foundation pit according to a design drawing;
s2b, respectively discharging position lines of a plurality of drainage ditches at the left side and the right side perpendicular to the position line of the post-cast strip;
s2c, excavating the post-cast strip and the drainage ditch according to the position line of the post-cast strip and the position line of the multi-channel drainage ditch, and communicating the post-cast strip and the drainage ditch;
s2d, gradually decreasing the gradient of the post-cast strip along one side, gradually decreasing the gradient of the drainage ditch along the direction of the post-cast strip, and enabling the depth of the post-cast strip to be larger than the originally designed depth;
s3, burying a water guide pipe according to a design drawing, arranging a water collection pit and guiding fracture water into the water collection pit;
wherein, step S3 includes:
s3a, burying a water guide pipe with holes at the deepened part of the post-cast strip;
s3b, paving broken stones or pebbles around the water guide pipe to form a seepage and drainage layer;
s3c, excavating a water collecting pit outside the foundation pit on one side, with the low gradient, of the post-cast strip according to a design drawing, wherein the water collecting pit is connected with the end part of the post-cast strip;
and S3d, gathering the crack water to a post-pouring zone through a drainage ditch, and discharging the crack water to a water collecting pit along a water guide pipe.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
the method has the advantages that the special treatment of the fracture water is not needed, the fracture water is not needed to be blocked, only the fracture water is needed to be drained in an organized manner, the method is convenient to operate, simple and practical, the surface of the foundation pit can be dried in time, the cushion can be constructed after the foundation pit is cleaned up, the effect of treating the fracture water in a large area is very obvious, the subsequent cushion construction is not influenced, and the normal construction can be ensured.
Preferably, the further technical scheme of the invention is as follows:
step S3, paving isolation layers on the post-cast strip and the plurality of drainage ditches respectively and pouring cushion layer concrete; and the concrete is prevented from blocking broken stones or sand pebbles in the drainage ditch and the post-cast strip.
In the step S3, the aqueduct is made of PVC material, and the maximum diameter of the aqueduct is not more than 50 mm; when can set up the displacement to reasonable within range, avoid the post-cast strip to excavate the oversize and lead to producing adverse effect to ground bearing capacity.
In the step S3, the isolation layer on the post-cast strip is made of plastic cloth, and the isolation layer on the drainage ditch is made of a thin cement plate; the setting of isolation layer can prevent that the rubble or the sand cobble that the concrete will post-cast strip neutralization drainage ditch from blockking up.
Drawings
FIG. 1 is a schematic view of a layout structure of drainage construction according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a post-cast strip according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a drainage ditch according to an embodiment of the present invention;
FIG. 4 is a schematic view of a water guide pipe installation structure according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a water guide duct according to an embodiment of the present invention;
FIG. 6 is a schematic view of a post-cast strip insulation layer mounting structure according to an embodiment of the invention;
FIG. 7 is a schematic view of an embodiment of a drain spacer mounting structure according to the present invention;
in the figure: a foundation pit 1; post-cast strip 2; a drainage ditch 3; a water conduit 4; a sump 5; crushed stone or pebbles 6; a concrete cushion 7; a plastic cloth 8; a thin cement slab 9.
Detailed Description
The invention will be better understood by the following description of embodiments thereof, but the applicant's specific embodiments are not intended to limit the invention to the particular embodiments shown, and any changes in the definition of parts or features and/or in the overall structure, not essential changes, are intended to define the scope of the invention.
Referring to fig. 1 to 7, the technical solution of the present invention is as follows:
a strongly weathered rock substrate large-area drainage construction method rich in low-pressure-bearing fracture water comprises the following steps:
s1, excavating a foundation pit 1, and excavating the foundation pit 1 to a designed elevation;
wherein, step S1 includes:
s1a, carrying out site paying-off positioning, and measuring paying-off positioning in a preset area according to a design drawing;
s1b, excavating the foundation pit 1, and excavating the foundation pit 1 to a designed elevation according to the position of the line;
s2, excavating a post-cast strip 2 and a plurality of drainage ditches 3 in the foundation pit 1 according to a design drawing; the number of the drainage ditches 3 is set according to the area of the foundation pit 1 and the abundance degree of the fracture water; a main drainage ditch and a secondary drainage ditch are designed according to a drawing by self without the post-cast strip 2;
wherein, step S2 includes:
s2a, releasing the position line of the post-cast strip 2 in the foundation pit 1 according to a design drawing;
s2b, respectively discharging position lines of the plurality of drainage ditches 3 at the left side and the right side perpendicular to the position line of the post-cast strip 2;
s2c, excavating the post-cast strip 2 and the drainage ditch 3 according to the position line of the post-cast strip 2 and the position line of the multi-channel drainage ditch 3, and communicating the post-cast strip 2 with the drainage ditch 3;
s2d, gradually decreasing the gradient of the post-cast strip 2 along one side, gradually decreasing the gradient of the drainage ditch 3 along the direction of the post-cast strip 2, and enabling the depth of the post-cast strip 2 to be larger than the originally designed depth; the slopes of the post-cast strip 2 and the drainage ditch 3 are set according to 2%, the depth of the post-cast strip 2 is 200mm deeper than the original design depth, and the width and the depth of the drainage ditch 3 are 100 mm;
s3, burying a water guide pipe 4 according to a design drawing, arranging a water collection pit 5 and guiding fracture water into the water collection pit 5;
wherein, step S3 includes:
s3a, burying a water guide pipe 4 with holes at the deepened part of the post-cast strip 2;
s3b, paving broken stones or pebbles 6 around the water guide pipe 4 to form a seepage and drainage layer;
s3c, excavating a water collecting pit 5 outside the foundation pit 1 on one side with the low gradient of the post-cast strip 2 according to a design drawing, wherein the water collecting pit 5 is connected with the end part of the post-cast strip 2;
s3d, gathering the crack water to the post-pouring belt 2 through the drainage ditch 3, and discharging the crack water to the water collecting pit 5 along the water guide pipe 4.
Step S3, paving isolation layers on the post-cast strip 2 and the multi-channel drainage ditch 3 respectively and pouring cushion layer concrete 7; the concrete is prevented from clogging the gutters 3 and the crushed stones or sand and pebbles 6 in the post-cast strip 2.
In the step S3, the water guide pipe 4 is made of PVC material, and the diameter of the water guide pipe 4 is 20 mm; the diameter of the water conduit 4 is determined according to the water quantity of the fracture water in the foundation pit 1, and the maximum diameter of the water conduit 4 is not more than 50 mm; when can set up displacement to reasonable within range, avoid post-cast strip 2 to excavate the oversize and lead to producing adverse effect to ground bearing capacity.
In the step S3, the isolation layer on the post-cast strip 2 adopts plastic cloth 8, and the isolation layer on the drainage ditch 3 adopts a thin cement plate 9; the setting of isolation layer can prevent that the concrete from blockking up rubble or the sand cobble 6 of post-cast strip 2 and escape canal 3.
The method has the advantages that the special treatment of the fracture water is not needed, the fracture water is not needed to be blocked, only the fracture water is needed to be drained in an organized manner, the method is convenient to operate, simple and practical, the surface of the foundation pit can be dried in time, the cushion can be constructed after the foundation pit is cleaned up, the effect of treating the fracture water in a large area is very obvious, the subsequent cushion construction is not influenced, and the normal construction can be ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (4)
1. A strongly weathered rock substrate large-area drainage construction method rich in low-pressure-bearing fracture water is characterized by comprising the following steps: the method comprises the following steps:
s1, excavating a foundation pit, and excavating the foundation pit to a designed elevation;
wherein, step S1 includes:
s1a, carrying out site paying-off positioning, and measuring paying-off positioning in a preset area according to a design drawing;
s1b, excavating a foundation pit, and excavating the foundation pit to a designed elevation according to the position of the line;
s2, excavating a post-cast strip and a plurality of drainage ditches in the foundation pit according to a design drawing;
wherein, step S2 includes:
s2a, releasing a position line of the post-cast strip in the foundation pit according to a design drawing;
s2b, respectively discharging position lines of a plurality of drainage ditches at the left side and the right side perpendicular to the position line of the post-cast strip;
s2c, excavating the post-cast strip and the drainage ditch according to the position line of the post-cast strip and the position line of the multi-channel drainage ditch, and communicating the post-cast strip and the drainage ditch;
s2d, gradually decreasing the gradient of the post-cast strip along one side, gradually decreasing the gradient of the drainage ditch along the direction of the post-cast strip, and enabling the depth of the post-cast strip to be larger than the originally designed depth;
s3, burying a water guide pipe according to a design drawing, arranging a water collection pit and guiding fracture water into the water collection pit;
wherein, step S3 includes:
s3a, burying a water guide pipe with holes at the deepened part of the post-cast strip;
s3b, paving broken stones or pebbles around the water guide pipe to form a seepage and drainage layer;
s3c, excavating a water collecting pit outside the foundation pit on one side, with the low gradient, of the post-cast strip according to a design drawing, wherein the water collecting pit is connected with the end part of the post-cast strip;
and S3d, gathering the crack water to a post-pouring zone through a drainage ditch, and discharging the crack water to a water collecting pit along a water guide pipe.
2. The construction method for draining the large area of the strongly weathered rock substrate rich in the low-bearing fracture water according to claim 1, is characterized in that: and step S3, paving isolation layers on the post-cast strip and the multi-channel drainage ditch respectively and pouring cushion layer concrete.
3. The construction method for draining the large area of the strongly weathered rock substrate rich in the low-bearing fracture water according to claim 1, is characterized in that: in step S3, the water guide pipe is made of PVC material, and the maximum diameter of the water guide pipe is not more than 50 mm.
4. The construction method for draining the large area of the strongly weathered rock substrate rich in the low-bearing fracture water according to claim 1, is characterized in that: in the step S3, the isolation layer on the post-cast strip is made of plastic cloth, and the isolation layer on the drainage ditch is made of a thin cement plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110265248.0A CN112982459A (en) | 2021-03-11 | 2021-03-11 | Large-area drainage construction method for strongly weathered rock substrate rich in low-pressure-bearing fracture water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110265248.0A CN112982459A (en) | 2021-03-11 | 2021-03-11 | Large-area drainage construction method for strongly weathered rock substrate rich in low-pressure-bearing fracture water |
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| Publication Number | Publication Date |
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| CN112982459A true CN112982459A (en) | 2021-06-18 |
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| CN202110265248.0A Pending CN112982459A (en) | 2021-03-11 | 2021-03-11 | Large-area drainage construction method for strongly weathered rock substrate rich in low-pressure-bearing fracture water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338346A (en) * | 2021-06-29 | 2021-09-03 | 北京天润建设有限公司 | Post-cast strip drainage structure, drainage system and construction method thereof |
| CN115012452A (en) * | 2022-06-15 | 2022-09-06 | 中建二局第二建筑工程有限公司 | Post-cast strip construction process and basement drainage pressure relief structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020043039A1 (en) * | 2000-10-17 | 2002-04-18 | Meredith Harold F. | Metal construction panel |
| CN101705691A (en) * | 2009-10-30 | 2010-05-12 | 南通建工集团股份有限公司 | Construction method of dewatering well under foundation slab in foundation pit |
| CN104404985A (en) * | 2014-10-08 | 2015-03-11 | 中国十七冶集团有限公司 | Construction method for basement floor post-cast strip waterproofing structure |
| WO2015051352A1 (en) * | 2013-10-06 | 2015-04-09 | Waters Louis A | Flood protection for underground air vents |
| CN110004935A (en) * | 2019-04-22 | 2019-07-12 | 上海建工一建集团有限公司 | A kind of locally deep pit drain measure trench system and construction method |
-
2021
- 2021-03-11 CN CN202110265248.0A patent/CN112982459A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020043039A1 (en) * | 2000-10-17 | 2002-04-18 | Meredith Harold F. | Metal construction panel |
| CN101705691A (en) * | 2009-10-30 | 2010-05-12 | 南通建工集团股份有限公司 | Construction method of dewatering well under foundation slab in foundation pit |
| WO2015051352A1 (en) * | 2013-10-06 | 2015-04-09 | Waters Louis A | Flood protection for underground air vents |
| CN104404985A (en) * | 2014-10-08 | 2015-03-11 | 中国十七冶集团有限公司 | Construction method for basement floor post-cast strip waterproofing structure |
| CN110004935A (en) * | 2019-04-22 | 2019-07-12 | 上海建工一建集团有限公司 | A kind of locally deep pit drain measure trench system and construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338346A (en) * | 2021-06-29 | 2021-09-03 | 北京天润建设有限公司 | Post-cast strip drainage structure, drainage system and construction method thereof |
| CN115012452A (en) * | 2022-06-15 | 2022-09-06 | 中建二局第二建筑工程有限公司 | Post-cast strip construction process and basement drainage pressure relief structure |
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Application publication date: 20210618 |