CN110344439B - Construction method of rear retaining wall drain hole - Google Patents
Construction method of rear retaining wall drain hole Download PDFInfo
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- CN110344439B CN110344439B CN201910692460.8A CN201910692460A CN110344439B CN 110344439 B CN110344439 B CN 110344439B CN 201910692460 A CN201910692460 A CN 201910692460A CN 110344439 B CN110344439 B CN 110344439B
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- retaining wall
- sleeve
- backfilling
- embedded
- drain pipe
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000011468 face brick Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000009412 basement excavation Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 239000004575 stone Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 238000009415 formwork Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Retaining Walls (AREA)
Abstract
A construction method of a rear retaining wall drain hole comprises a wall body drainage pipeline and a reversed filter layer. Through pre-buried sleeve pipe at retaining wall structure construction stage, fill out earlier back excavation installation water drain pipe and anti-package of straining after, lay earlier and paste retaining wall large face brick, lay after and paste methods such as water drain hole department face brick can realize that the retaining wall template consolidates conveniently, the bench back earthwork backfills efficiently, and the outlet pipe is difficult for taking place the damage, can ensure simultaneously that the outlet pipe pinpoints, ensures that the face brick is laid and pastes beautifully.
Description
Technical Field
The invention relates to a construction method of a rear retaining wall drain hole.
Background
At present, traditional retaining wall wash-out pipe buries underground at retaining wall structure work progress, respectively reserves one section length in the retaining wall both sides. And the extending drain pipe is wrapped by adopting an inverted filter bag at one side of the earthwork backfill. This construction method has several disadvantages: (1) because the water drain pipe extends out of the retaining wall, holes need to be formed in the templates on the two sides, and the water drain pipe extends out of the templates to ensure that the wall templates are straight, so that the templates are inconvenient to reinforce, the construction efficiency is low, and the water drain pipe is easy to damage in the template reinforcing and removing processes; (2) the drainage pipe embedded in the main body stage cannot ensure accurate positioning, and the typesetting effect of the wall body decorative face bricks in the decoration stage is influenced; (3) because the water drain pipe stretches out of the wall body, in the earth backfilling stage, the water drain pipe needs to be backfilled and tamped one by one, so that the backfilling efficiency is influenced on one hand, and the water drain pipe is easily damaged on the other hand.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a construction method of a rear retaining wall drain hole, which has the advantages of convenient reinforcement of a retaining wall template, high earthwork backfilling efficiency, low breakage rate of a drain pipe, accurate positioning of the drain pipe and attractive paving of face bricks.
The purpose of the invention is realized by adopting the following technical scheme:
a construction method of a rear retaining wall drain hole comprises the following steps:
a. and (3) binding wall body steel bars:
binding the wall body reinforcing steel bars of the retaining wall after the concrete pouring of the retaining wall foundation is finished;
b. embedding a sleeve:
positioning a horizontal central line of a water drainage hole on a vertical steel bar, positioning a horizontal position of each water drainage hole on the basis of the retaining wall, marking the horizontal steel bar through a plumb core, wrapping and sealing two ends of a sleeve to be embedded, fixing the sleeve to be embedded in a steel bar framework by adopting a short steel bar according to the marked position, wherein the embedded sleeve does not extend out of a wall body of the retaining wall, the diameter of the sleeve to be embedded is larger than that of a water drainage pipe, and the length of the sleeve to be embedded is consistent with that of the water drainage pipe;
c. carrying out template support and concrete pouring on the retaining wall according to the construction standard;
e. backfilling the table back of the retaining wall;
f. and (3) reverse excavation of earth:
reversely excavating earth backfilled by the retaining wall according to the position of the embedded sleeve, wherein the excavated size meets the embedding of a reverse filter bag;
g. burying a drain pipe:
after the reverse excavation is finished, opening two ends of the pre-buried sleeve, inserting the water drain pipe into the pre-buried sleeve, and tightly filling a gap between the sleeve and the water drain pipe by adopting cement mortar;
h. and installing an inverted filter bag at the water inlet end of the water drain pipe, then backfilling and filling the pit, and finally plastering, facing and paving the retaining wall according to the engineering construction process requirements.
Furthermore, in the step b, firstly, the vertical face bricks of the retaining wall body are typeset, the position of a deformation joint of the retaining wall is considered, the typesetting is carried out by taking a standard retaining wall section as a unit, the water outlet is positioned at the central position of a single face brick, the consistency of the horizontal elevation and the horizontal distance is ensured, the vertical steel bars at the position are disconnected when the positions of the vertical steel bars and the horizontal steel bars conflict with the position of the sleeve to be embedded, and the horizontal steel bars are avoided.
And step e, after the concrete strength of the retaining wall reaches a design value, backfilling the abutment back of the retaining wall by using a design material, performing layered backfilling and layered compaction by using a backhoe excavator, a bulldozer and a road roller in a matching manner during backfilling, compacting by using a small road roller or a manual rammer within a range of 2m close to the retaining wall, stopping backfilling after backfilling to 50cm above the top of the embedded casing pipe, and continuously backfilling after the embedding of the drain pipe is finished.
And step g, according to the positions of the drain holes in the vertical face brick typesetting and positioning of the retaining wall body, marking a horizontal central line and a vertical central line of the designed drain pipe on the retaining wall, and fixing the mounting and positioning marking line of the drain pipe in the embedded sleeve.
Further, in the step h, one side of the reverse filter bag from the bottom to the top comprises a gravel or crushed stone layer with the diameter not less than 20mm, a gravel or crushed stone layer with the diameter of 1-4mm and 300-400 g/square meter geotextile.
And furthermore, in the step h, before paving the face bricks at the drainage hole, measuring the positions of the drainage pipe relative to the peripheral face bricks on site, drilling holes at the corresponding positions of the face bricks on site, installing the face bricks with the drilled holes, and finally installing sleeve heads at the openings of the face bricks.
Due to the adoption of the method, the invention has the following beneficial effects:
(1) the construction speed is fast: only pre-buried sleeve pipe in retaining wall main part construction stage can ensure that the template is propped up and is established more efficiently. The embedded sleeve does not extend out of the wall body, so that the earthwork backfilling is more efficient.
(2) Ensure that the retaining wall body is decorated beautifully: the water drain pipe can be adjusted within a certain range in the sleeve, so that the situation that the decoration appearance of the wall body face brick is influenced because the water drain holes are directly embedded in the shear wall and cannot be adjusted after positioning deviation occurs is avoided.
(3) Is beneficial to the protection of finished products: the drain pipe is embedded in a rear-mounted manner, so that the problem that the drain pipe cannot be repaired due to damage in the construction process is solved.
(4) The shear wall template is convenient to reinforce.
In conclusion, the retaining wall formwork reinforcing structure and the construction method thereof can realize convenient reinforcing of the retaining wall formwork, high backfilling efficiency of the bench back earthwork, difficult damage of the water drain pipe and guarantee accurate positioning of the water drain pipe.
Drawings
FIG. 1 is a schematic view of the construction of the present invention.
In the figure: 1. retaining wall, 2, anti-package of straining, 3, the outlet pipe.
Detailed Description
The following describes a method for constructing a drainage hole of a rear retaining wall in detail with reference to the accompanying drawings.
Referring to fig. 1, a construction method of a rear retaining wall drain hole, the construction process flow is as follows: wall body steel bar binding, casing pipe embedding, formwork supporting, concrete pouring, retaining wall back backfilling, earth reverse excavation, water drain pipe embedding, reverse filter bag installation, backfilling, plastering, tiling and installation sleeve head
During construction, the construction of each retaining wall structure is carried out by adopting a 'jumping cabin method', and foam boards with certain strength are adopted at deformation joints to isolate the adjacent two retaining wall foundations from the wall top. The concrete construction steps are as follows:
1. wall body steel bar binding
And after the concrete pouring of the retaining wall foundation is finished, building double rows of floor type steel pipe scaffolds, and binding the reinforcing steel bars of the retaining wall body according to construction drawings.
2. Sleeve pre-embedding
Firstly, typesetting the face bricks on the vertical surface of the wall body, comprehensively considering the position of a deformation joint of the retaining wall, typesetting by taking the retaining wall with a standard section as a unit, and positioning the water drainage hole at the central position of a single face brick to ensure that the horizontal elevation is consistent, the horizontal distance is consistent, and the horizontal distance is approximately consistent with the design size and the elevation. According to the arrangement layout, a horizontal center line of the drainage hole is positioned on the vertical steel bar, the horizontal position of each drainage hole is positioned on the foundation of the retaining wall, and the horizontal steel bar is marked through a vertical center. And covering the two ends of the embedded sleeve by using a covering material to prevent concrete from flowing into the embedded sleeve. And the embedded sleeve is fixed in the steel bar framework from left to right by adopting short steel bars according to the marked position. The diameter of the sleeve embedded in the wall body steel bar is larger than that of the designed water drain pipe by two models, the materials are consistent, and the length of the sleeve is the same as that of the embedded sleeve of the shear wall. And for the place where the vertical steel bars and the horizontal steel bars conflict with the embedded sleeves, the vertical steel bars are disconnected, and the horizontal steel bars are bypassed.
3. Formwork support
Taking a wood formwork as an example, firstly erecting the formwork and the secondary ridges, then penetrating water stop screws according to the construction scheme, arranging inclined struts on the horizontal double-steel-pipe main ridges, and adjusting the verticality and the flatness. And entering the next procedure after acceptance.
4. Pouring of concrete
And (5) pouring concrete according to a construction scheme. And the concrete is guaranteed to be vibrated compactly in the vibrating process, particularly around the root part of the retaining wall and the embedded sleeve.
5. Retaining wall back of a platform backfills
And after the concrete strength of the retaining wall reaches a design value, backfilling the abutment back of the retaining wall by adopting a design material. And a back-hoe excavator, a bulldozer and a road roller are matched to carry out layered backfill and layered compaction. And compacting by a small road roller or manual ramming within 2m close to the retaining wall. The load of the mechanical equipment is smaller than the designed load value. And after the water pipe is backfilled to 50cm above the top of the embedded sleeve, the backfilling is suspended, and the backfilling is continued after the embedding of the water drain pipe is finished.
6. Reverse excavation of earth
And according to the position of the embedded sleeve, a small-sized backhoe excavator and manpower are adopted to perform earth side backward excavation behind the retaining wall, and the size of the pit satisfies the embedding of the reverse filter bag.
7. Burying drain pipe
And after the reverse excavation is finished, inserting the drain pipe into the embedded sleeve, and positioning the position of the drain hole according to the typesetting drawing. Marking a horizontal central line and a vertical central line of the designed drain pipe on a retaining wall, positioning the marked line on the wall, and adopting cement mortar to tightly fill a gap between the sleeve and the drain pipe. And (5) wrapping the reverse filter bag after the strength of the mortar reaches a certain strength, backfilling broken stones and compacting.
8. Reverse filter bag installation
And (5) installing the reverse filter bag according to design requirements. The reverse filter bag is composed of 20mm coarse gravel or broken stone, 1-4mm gravel or stone chips (mud content is less than 2%) and 300-400 g/square meter geotextile from bottom to top.
9. Backfilling
And (3) filling the pit with a material which is easy to compact by adopting a manual ramming mode, such as broken stones, pebbles and medium coarse sand, so as to ensure compact backfilling and damage the drain pipe part. And backfilling the large surface of the retaining wall after backfilling is finished.
10. Surface layer construction
Plastering the retaining wall according to the construction process requirement of plastering engineering; after plastering and drying, paving and pasting face bricks according to a typesetting drawing and face brick construction process requirements, reserving the face bricks at all the water drainage holes for temporary paving, measuring the positions of the water drainage pipes relative to the peripheral face bricks on site, drilling holes at the corresponding positions of the face bricks on site, installing the face bricks with the drilled holes, and finally installing sleeve heads at the openings of the face bricks.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A construction method of a rear retaining wall drain hole is characterized in that: the method comprises the following steps:
a. and (3) binding wall body steel bars:
binding the wall body reinforcing steel bars of the retaining wall after the concrete pouring of the retaining wall foundation is finished;
b. embedding a sleeve:
positioning a horizontal central line of a water drainage hole on a vertical steel bar, positioning a horizontal position of each water drainage hole on the basis of the retaining wall, marking the horizontal steel bar through a plumb core, wrapping and sealing two ends of a sleeve to be embedded, fixing the sleeve to be embedded in a steel bar framework by adopting a short steel bar according to the marked position, wherein the embedded sleeve does not extend out of a wall body of the retaining wall, the diameter of the sleeve to be embedded is larger than that of a water drainage pipe, and the length of the sleeve to be embedded is consistent with that of the water drainage pipe;
c. carrying out template support and concrete pouring on the retaining wall according to the construction standard;
e. backfilling the table back of the retaining wall;
f. and (3) reverse excavation of earth:
reversely excavating earth backfilled by the retaining wall according to the position of the embedded sleeve, wherein the excavated size meets the embedding of a reverse filter bag;
g. burying a drain pipe:
after the reverse excavation is finished, opening two ends of the pre-buried sleeve, inserting the water drain pipe into the pre-buried sleeve, and tightly filling a gap between the sleeve and the water drain pipe by adopting cement mortar;
h. and installing an inverted filter bag at the water inlet end of the water drain pipe, then backfilling and filling the pit, and finally plastering, facing and paving the retaining wall according to the engineering construction process requirements.
2. The method for constructing a rear retaining wall weep hole according to claim 1, wherein: and b, firstly typesetting the vertical face bricks of the wall body of the retaining wall, taking the position of a deformation joint of the retaining wall into consideration, typesetting by taking a standard section of the retaining wall as a unit, positioning the water outlet at the central position of a single face brick to ensure that the horizontal elevation is consistent and the horizontal distance is consistent, and disconnecting the vertical steel bars at the position when the positions of the vertical steel bars and the horizontal steel bars conflict with the position of the sleeve to be embedded according to the typesetting of the vertical face bricks of the retaining wall body, and avoiding the horizontal steel bars around the sleeve.
3. The method for constructing a rear retaining wall weep hole according to claim 1, wherein: and e, backfilling the abutment back of the retaining wall by using a design material after the concrete strength of the retaining wall reaches a design value, performing layered backfilling and layered compaction by using a back-hoe excavator, a bulldozer and a road roller in a matching way during backfilling, compacting by using a small road roller or a manual rammer within a range of 2m close to the retaining wall, pausing backfilling after backfilling to 50cm of the top of the embedded casing pipe, and continuously backfilling after the embedding of the water drain pipe is finished.
4. The method for constructing a rear retaining wall weep hole according to claim 1, wherein: and step g, according to the positions of the drain holes in the typesetting and positioning of the face bricks on the vertical surface of the wall body of the retaining wall, marking a horizontal central line and a vertical central line of the designed drain pipe on the retaining wall, and fixing the mounting and positioning marking line of the drain pipe in the embedded sleeve.
5. The method for constructing a rear retaining wall weep hole according to claim 1, wherein: in the step h, the reverse filter bag comprises a coarse gravel or crushed stone layer with the diameter not less than 20mm, a gravel or stone chip layer with the diameter of 1-4mm and 300-400 g/square meter geotextile from the bottom to the top.
6. The method for constructing a rear retaining wall weep hole according to claim 1, wherein: and h, before paving and pasting the face bricks at the drainage hole, measuring the positions of the drainage pipe relative to the peripheral face bricks on site, drilling holes at the corresponding positions of the face bricks on site, installing the face bricks with the drilled holes, and finally installing sleeve heads at the openings of the face bricks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692460.8A CN110344439B (en) | 2019-07-30 | 2019-07-30 | Construction method of rear retaining wall drain hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910692460.8A CN110344439B (en) | 2019-07-30 | 2019-07-30 | Construction method of rear retaining wall drain hole |
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| CN110344439A CN110344439A (en) | 2019-10-18 |
| CN110344439B true CN110344439B (en) | 2021-01-26 |
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| CN111910679B (en) * | 2020-08-12 | 2022-02-18 | 中建八局第二建设有限公司 | Construction method of overlong and ultrahigh-weight retaining wall under complex terrain |
| CN115142465B (en) * | 2022-06-18 | 2024-05-14 | 中国水利水电第十六工程局有限公司 | Construction method of upward inclined gravity retaining wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100654936B1 (en) * | 2004-04-01 | 2006-12-08 | 주식회사 삼성산업 | Method for constructing retaining wall |
| CN202559376U (en) * | 2012-04-28 | 2012-11-28 | 浙江润业建设有限公司 | Near-river municipal administration road structure below viaduct bridge |
| CN205776286U (en) * | 2016-05-17 | 2016-12-07 | 中交第二航务工程勘察设计院有限公司 | Retaining wall pumping equipment |
| CN205804401U (en) * | 2016-06-28 | 2016-12-14 | 宇航交通建设集团有限公司 | Retaining wall and the soil protection structure comprising this retaining wall |
| CN205917646U (en) * | 2016-08-03 | 2017-02-01 | 宋斌 | Hydraulic engineering is with having retaining wall device that anti - filter constructs |
| CN206829181U (en) * | 2017-06-08 | 2018-01-02 | 中冶集团武汉勘察研究院有限公司 | The retaining wall sluicing pore structure of replaceable cartridge |
| CN206859243U (en) * | 2017-06-14 | 2018-01-09 | 魏尚卿 | A kind of mortar flag stone retaining wall discharge structure |
| CN207775922U (en) * | 2017-12-15 | 2018-08-28 | 中国建筑第八工程局有限公司 | Drainpipe for retaining wall |
| CN108316237B (en) * | 2018-01-26 | 2020-02-14 | 南京珍珠泉园林建设有限公司 | Revetment retaining wall |
| CN110029655A (en) * | 2019-04-22 | 2019-07-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Cutting wall anti-drainage structures that strains |
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