CN107447778A - The heightening and consolidation structure and method of a kind of in-service reinforced concrete retaining wall - Google Patents
The heightening and consolidation structure and method of a kind of in-service reinforced concrete retaining wall Download PDFInfo
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- CN107447778A CN107447778A CN201710845643.XA CN201710845643A CN107447778A CN 107447778 A CN107447778 A CN 107447778A CN 201710845643 A CN201710845643 A CN 201710845643A CN 107447778 A CN107447778 A CN 107447778A
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- 238000010276 construction Methods 0.000 claims abstract description 46
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Classifications
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- 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
-
- 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
- E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
-
- 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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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Retaining Walls (AREA)
Abstract
The present invention provides a kind of the heightening and consolidation structure and method of in-service reinforced concrete retaining wall, structure includes in-service reinforced concrete retaining wall, in-service reinforced concrete retaining wall top, which is set, reinforces riser, in-service reinforced concrete retaining wall is connected with reinforcing riser in a manner of bar planting, the bottom for reinforcing riser sets laterally decompression off-load flat board, and laterally decompression off-load flat board is located at in-service reinforced concrete retaining wall wall back side, laterally depressurizes off-load flat board bottom and Grouting Pipe or mini pile are set；Reinforce between riser and laterally decompression off-load flat board to be additionally provided with and help plate.Method carries on the back reinforcing of banketing including preparation of construction, in-service reinforced concrete retaining wall wall, foundation trench excavates, construction is horizontal depressurizes off-load flat board, bar planting construction, construction reinforcement riser and helps plate, the reinforcing riser wall back of the body seven steps of backfill.The in-service reinforced concrete retaining wall heightening and consolidation scheme of the present invention can save time and cost, while ensure the safety and stability of original side slope.
Description
Technical field
The invention belongs to retaining wall heightening and consolidation technology, and in particular to a kind of in-service reinforced concrete retaining wall is increased
Fixing structure and method.
Background technology
China is the country of a topography and geomorphology choppy, and substantial amounts of architectural engineering especially road and rail engineering can not
What is avoided is built in the complex grounds such as mountain area location, due to above location stratum is more complicated, geological conditions changes greatly, crag compared with
The presence of many unfavorable factors such as more, slope support engineering are particularly important.
Retaining wall is for supporting Roadbed Soil or the hillside soil body, preventing from banketing or a kind of of soil deformation unstability constructs
Thing.Retaining wall can be used to stablize embankment and cut slope, lower execavated rockmass height, reduces earthwork volume and takes up an area face
Product, roadbed toe is shunk, prevents current scour roadbed, prevent hillside coating is glided and resistance is come down etc., and be frequently used for
The disasters such as regulation landslide, landslide.In steep slope region, rock decay and for avoiding the cutting of a large amount of excavations and reduction slope height
Section, it is possible to create landslide, the Unfavorable Conditions on landslide, high roadbed location, current scour are serious or for a long time by the edge of water immersion
River roadbed location, all it is contemplated that for protection important building, ecological environment or location of other special requirements etc. and builds retaining wall.
Therefore, retaining wall is applied very extensive in Practical Project.
As a kind of long-term structures, retaining wall can be potentially encountered wall body cracking, external drum in use, it is also possible to meet
Wall body is caused to be increased to planning and adjusting, pole respective location, which even occurs, surprisingly to cave in, and with the exploitation in hillside soil, heap
Soil, situations such as banketing cause the increase of original slope height, cause original retaining wall to be no longer applicable, safety and stability can not
Reach requirement, threaten the security of the lives and property of the country and people.Traditional solutions are usually that original retaining wall is removed into weight
Build, but the quantities of this method is big, cost is also higher, time-consuming, while also along with certain danger, it is original
Easily there is unstability in side slope, therefore no matter from the point of view of engineering construction angle or people life property safety's angle, in-service reinforcing bar
The research and development of concrete retaining wall heightening and consolidation technology are very necessary.
The content of the invention
The problem of existing for prior art, the present invention provide a kind of heightening and consolidation knot of in-service reinforced concrete retaining wall
Structure and method, effectively increase the physical and mechanical property of in-service reinforced concrete retaining wall, smoothly realize in-service reinforced concrete
The heightening and consolidation of native retaining wall.The technical scheme is that：
A kind of heightening and consolidation structure of in-service reinforced concrete retaining wall, including in-service reinforced concrete retaining wall, it is described
In-service reinforced concrete retaining wall top, which is set, reinforces riser, the in-service reinforced concrete retaining wall and the reinforcing riser with
Bar planting mode connects, and the bottom for reinforcing riser sets laterally decompression off-load flat board, and the laterally decompression off-load flat board
Positioned at the in-service reinforced concrete retaining wall wall back side, the laterally decompression off-load flat board bottom sets Grouting Pipe or micro-
Type stake；It is additionally provided between the reinforcing riser and the laterally decompression off-load flat board and helps plate.
Further, spacing≤300 of steel pipe or reinforcing bar × 300mm in the bar planting mode.
Further, spacing≤1.5m between the Grouting Pipe adjacent tubes, in quincunx or arranged in squares.
It is further, described that to help plate be triangular structure, its two short sides respectively with the reinforcing riser and the transverse direction
Depressurize the connection of off-load flat board.
A kind of heightening and consolidation method of in-service reinforced concrete retaining wall, comprises the following steps：
(1) preparation of construction：Banketed according to the foundation of in-service reinforced concrete retaining wall, structure type, the wall back of the body closely knit
Degree and bearing capacity, construction parameter is obtained, and carry out the preparation of place, construction material and plant equipment；
(2) in-service reinforced concrete retaining wall wall carries on the back reinforcing of banketing：Using high-pressure slip-casting or mini pile mode to in-service
The reinforced concrete retaining wall wall back of the body, which bankets, to be reinforced；
(3) foundation trench excavates：The foundation trench that the in-service reinforced concrete retaining wall wall back of the body bankets excavates, and removes surflaes, for laterally
Depressurize the construction of off-load flat board and the scope of operation is provided；
(4) off-load flat board is laterally depressurized in construction：The reinforcing bar of off-load flat board, pouring molding are laterally depressurized in installation；
(5) bar planting is constructed：Bar planting construction is carried out at the top of in-service reinforced concrete retaining wall；
(6) construction reinforcement riser and plate is helped：Installation reinforces riser and helps the reinforcing bar of plate, pouring molding；
(7) back of the body backfill of riser wall is reinforced：Riser wall body to be reinforced, help plate and the laterally strong concrete of decompression off-load flat board
After degree reaches the 75% of design strength, carried on the back using the in-service reinforced concrete retaining wall wall of filler back-filling in layers.
Further, soil thickness≤300mm that individual layer backfills in the step (7), backfill compacting factor >=0.94.
Compared with prior art, the features of the present invention and beneficial effect are：
The present invention sets the reinforcing mode that the in-service reinforced concrete retaining wall wall back of the body bankets, and on the one hand adds original banket
Foundation bearing capacity, horizontal decompression off-load flat board is acted on bearing capacity and meet on desired ground, while reduce original
There is the vertical bearing capacity that retaining wall is subjected to, on the other hand improve the physical parameter that the wall back of the body bankets, it is total to add retaining wall
The antiskid of body and resistance to overturning；Horizontal decompression off-load flat board is set to increase the load assignment for reinforcing that riser and its wall back of the body banket
Area, while reduce a part and act on the soil lateral pressure of existent retaining wall, add the anti-overturning of reinforcing riser and
Stability；The bar planting connected mode of reinforcing riser and original retaining wall structure further increases the rigidity of overall retaining wall, carries
The height and stable degree of existent retaining wall are risen, it also avoid time-consuming caused by dismounting is rebuild；In addition, the present invention can save
Cost.Compared with tradition removes the processing mode rebuild, in-service reinforced concrete retaining wall heightening and consolidation scheme energy of the invention
Enough save time and cost, while ensure the safety and stability of original side slope, retaining wall can be set according to actual conditions
The parameter such as size and basement process form, there is broad applicability.
Brief description of the drawings
Fig. 1 is the diagrammatic cross-section of the heightening and consolidation structure of the in-service reinforced concrete retaining wall of the present invention；
Fig. 2 is the process chart of the heightening and consolidation method of the in-service reinforced concrete retaining wall of the present invention；
In figure：1st, Grouting Pipe, 2, in-service reinforced concrete retaining wall, 3, horizontal decompression off-load flat board, 4, bar planting, 5, reinforce
Riser, 6, help plate.
Embodiment
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings, described is the solution to the present invention
Release rather than limit.
As shown in figure 1, the present invention provides a kind of heightening and consolidation structure of in-service reinforced concrete retaining wall, including in-service steel
Reinforced concrete retaining wall 2, the in-service top of reinforced concrete retaining wall 2, which is set, reinforces riser 5, in-service reinforced concrete retaining wall 2
It is connected with reinforcing riser 5 in a manner of bar planting 4, spacing≤300 of steel pipe or reinforcing bar × 300mm in bar planting mode；Reinforce riser 5
Bottom sets laterally decompression off-load flat board 3, and laterally depressurizes off-load flat board 3 and carried on the back positioned at the in-service wall of reinforced concrete retaining wall 2
Top, laterally depressurize the bottom of off-load flat board 3 and Grouting Pipe 1 or mini pile are set, when using slip casting form of tubes, Grouting Pipe is adjacent
Spacing≤1.5m between pipe, in quincunx or arranged in squares；Reinforce between riser 5 and laterally decompression off-load flat board 3 and also set
Plate 6 is helped, it is triangular structure to help plate 6, and its two short sides are connected with reinforcing riser 5 and laterally depressurizing off-load flat board 3 respectively.
The present invention also provides a kind of heightening and consolidation method of in-service reinforced concrete retaining wall, its process chart such as Fig. 2
It is shown, comprise the following steps：
(1) preparation of construction：Banketed according to the foundation of in-service reinforced concrete retaining wall, structure type, the wall back of the body closely knit
Degree and bearing capacity, construction parameter is obtained, and carry out the preparation of place, construction material and plant equipment；
(2) in-service reinforced concrete retaining wall wall carries on the back reinforcing of banketing：Using high-pressure slip-casting or mini pile mode to in-service
The reinforced concrete retaining wall wall back of the body, which bankets, to be reinforced；
(3) foundation trench excavates：The foundation trench that the in-service reinforced concrete retaining wall wall back of the body bankets excavates, and removes surflaes, for laterally
Depressurize the construction of off-load flat board and the scope of operation is provided；
(4) off-load flat board is laterally depressurized in construction：The reinforcing bar of off-load flat board, pouring molding are laterally depressurized in installation；
(5) bar planting is constructed：Bar planting construction is carried out at the top of in-service reinforced concrete retaining wall；
(6) construction reinforcement riser and plate is helped：Installation reinforces riser and helps the reinforcing bar of plate, pouring molding；
(7) back of the body backfill of riser wall is reinforced：Riser wall body to be reinforced, help plate and the laterally strong concrete of decompression off-load flat board
After degree reaches the 75% of design strength, carried on the back using the in-service reinforced concrete retaining wall wall of filler back-filling in layers, wherein individual layer backfills
Soil thickness≤300mm, backfill compacting factor >=0.94.
Embodiment 1
Liaoning Shenyang location roadbed side slope original height 5.5m, length about 100m, stratum is from top to bottom：1.0~3.0m
Thick plain fill, 2.0~3.5m thickness silty clays, 2.0~3.8m thickness completely decomposed mud stone, it is more than for thickness below completely decomposed mud stone
6.0m severely-weathered Sandy Silt, original in-service reinforced concrete retaining wall are cantilevered Reinforced Concrete Retaining Walls, and side slope wall is carried on the back
Bearing capacity f after plain fill compactingak=110~130Kpa, retaining wall has been run for many years, because roadbed is increased, according to existing rule
Drawing causes the highly desirable increase 4.5m of original retaining wall.
Retaining wall heightening and consolidation measure is as follows, and concrete form refers to Fig. 1：Former retaining wall rolling earth behind retaining wall is noted using splitting
Slurry, 1 long 6.0m of Grouting Pipe, spacing 1.5m × 1.5m, quincuncial arrangement, makes the plain fill bearing capacity f after processingak≥160Kpa；
Loss of weight off-load flat board 3 high 500mm, width 4200mm；Reinforce riser 5 to be connected using bar planting method with original retaining wall riser 2, bar planting
4 length 800mm, spacing 200mm × 200mm, anchor into original retaining wall and newly-built retaining wall riser difference 400mm；Riser 5 is high
4000mm, thickness 600mm；Help plate 6 thick 450mm, horizontal spacing 4500mm.
If will original retaining wall remove after rebuild new barricade, it is necessary to devote a tremendous amount of time and expense, lose more than gain, and
The safety and stably of original side slope is not necessarily can guarantee that in demolishing process, the heightening and consolidation structure and method for using the present invention can be with
Successfully solves the problem.
Specific construction flow follows the steps below with reference to figure 2：
1st, preparation of construction
1.1 technique preparation
A. be familiar with and understand the foundation of original reinforced concrete retaining wall, structure type, the wall back of the body banket compactness and
Bearing capacity；
B. by geology, hydrological data, environmental requirement, with reference to field condition, surveying and locating makes excavation scope, it is determined that excavating
Mode, depth；
C. it is familiar with the requirement of reinforcement fabrication installation specification, calculates number of steel bars, draws steel bar meter installation drawing；
D. template stress is checked according to construction drawing and engineering structure form, load；
1.2 Farm Planning
Scene need to accomplish " three supplies and one leveling ", after excavation of foundation pit, according to foundation ditch surrounding landform, carry out that ground is anti-, drainage works；
1.3 materials prepare
A. consumable material：Concrete, reinforcing bar, plastic row according to needed for retaining wall construction is selected in design and relevant construction requirement
The materials such as water sheet material, and former material inspection is carried out by design and relevant standard samples, through examining qualified former material to be sent to by stages and in groups
Job site；
B. circulation material：According to the construction method of use, the material such as reasonable selection template, steel pipe, the lumps of wood；
1.4 plant equipment prepare
Get out the plant equipment needed for retaining wall；
2nd, in-service reinforced concrete retaining wall wall carries on the back reinforcing of banketing
Bearing capacity fak >=the 160Kpa to be banketed using Application of High pressure Split Grouting, the wall back of the body after high-pressure slip-casting is handled；
3rd, foundation trench excavates
After original in-service reinforced concrete retaining wall wall back of the body bankets and reaches design bearing capacity, carry out original in-service reinforcing bar and mix
The foundation trench that the solidifying native retaining walls back of the body bankets is excavated, and removes surflaes, and the scope of operation is provided for laterally decompression off-load flat board cushion construction；
4th, off-load flat board bed course is laterally depressurized in construction：The thick C15 plain concrete cushion layers of 0.1m~0.2m are poured, laterally to subtract
The construction of off-load flat board is pressed to provide the scope of operation；
5th, off-load flat board is laterally depressurized in construction
5.1 steel bar meter
Using HRB335 and HRB400 two types reinforcing bars, processed after former material is qualified after testing in strict accordance with drawing,
The oil stain of rebar surface, paint dirt, iron rust are all first removed clean, joint by whether reinforcing bar former material, or the finished product of machine-shaping
Overlap joint welding can be used, fusion length and quality will meet design and code requirement；
5.2 reinforcement installation
Semi-finished product reinforcing bar is transported to job site installation after the assay was approved, by steel bar meter field；
Surveying setting-out carries out reinforcement installation after determining laterally decompression off-load panel size, is required according to design drawing, per single
The bar one-time colligation of the horizontal decompression off-load flat board of first section, installation forming, the quantity of reinforcing bar colligation point, spacing etc. will meet
Design requirement；
Process and reinforcing bar is installed, carry out disposable colligation, installation forming, pile foundation reinforcing bar is anchored into transverse direction by design requirement
Off-load flat board is depressurized, and is reserved and is reinforced riser and help the connection reinforcing bar of plate, makes laterally to depressurize off-load flat board with reinforcing riser
And help plate to be connected firmly, quantity, the spacing of reinforcing bar colligation point will meet design requirement；
5.3 model sheetinstallat
The O. gracilipes for the horizontal decompression off-load flat board made according to survey crew's setting-out, installation form, template can use
Die gang form, before model sheetinstallat, by the polishing of the contact surface of template and concrete, clean out and brush the water-soluble demoulding
Agent；
5.4 concreting
Before concreting, go through bar types, quantity and protective layer situation, template position deviation, cross dimensions,
Surface smoothness, absolute altitude and support conditions etc., and concrete performance is tested, meet after requiring, you can carry out coagulation
Soil pours；
Walling bottom plate is poured, points three layers pour, and during layer-by-layer distribution, pour the second layer after having poured one layer again, paving thickness is not
Preferably greater than 40cm；Concreting is carried out continuously, and must not be interrupted, and when pause interval for some reason, its intermittent time should be less than front layer
The presetting period of concrete；, should be by pouring interrupt processing when more than the intermittent time is allowed, while indwelling construction joint is answered, construct
The plane of seam should be with the axis perpendicular of structure；
After concreting, finishing, floating concrete exposed surface, take secondary calendaring technology in time；
5.5 form removable
When laterally decompression off-load flat board concrete strength reaches more than 2.5MPa, and its surface and corner angle not because of dismounting and by
Damage, concrete temperature are in cooldown period, and between component core concrete and surface concrete, surface concrete and environment
When temperature difference is no more than 20 DEG C, you can remove the template of laterally decompression off-load flat board；
5.6 subsiding cracks are constructed
2cm thickness cystosepiments can be set in subsiding crack position, wait base concrete pour after the completion of, will first stitch before subsiding crack filling
Cystosepiment removes the pitch hemp cut clean, tunneling boring filling has been soaked, to accomplish during filling slit width uniformly, vertical, the ring that stitches body
Insertion, filling are closely knit, bright and clean without cavity, appearance；
6th, the bar planting that construction reinforcement riser is connected with in-service reinforced concrete retaining wall
After the bar planting scope of operation has been cleared up, the reinforcing bars of φ 25 are implanted into original in-service reinforced concrete retaining wall structure,
Bar spacing 200mm × 200mm, after the completion of bar planting, by design requirement screwing steel bars, and reserve the connection steel with reinforcing riser
Muscle, on request installation form and casting concrete, Specific construction flow were constructed with step 5 laterally decompression off-load flat board construction
To focus on finished product protection in journey；
7th, construction reinforcement riser and plate is helped
7.1 construction joint dabbings
When laterally decompression off-load flat board and wedge-shaped connector concrete strength reach more than 2.5MPa, carry out reinforce riser and
The construction of plate is helped, first manually cuts laterally decompression off-load flat board and the cement bonded sand reinforced riser, help plate joint part concrete surface
Slurry and the weak layer of pine, rinsed well with water after dabbing, big fresh concrete area is not less than the gross area 75% is exposed after dabbing；
7.2 reinforcement installation
A. steel bar meter
Steel bar meter requirement is the same as 5.1 steel bar meters；
B. reinforcement installation
Semi-finished product reinforcing bar is transported to job site installation after the assay was approved, by steel bar meter field, first welds spreading riser and helps
Plate stud, then the horizontal reinforcement installed and reinforce riser, help plate, finally install pull hook muscle.
Surveying setting-out determination reinforcing riser, reinforcement installation is carried out after helping plate O. gracilipes, required according to design drawing, per single
The reinforcing riser of first section, the reinforcing bar of plate is helped to carry out disposable colligation, installation forming, the quantity of reinforcing bar colligation point, spacing etc. will accord with
Close design requirement；
7.3 model sheetinstallat
Reinforcement installation colligation finishes, it is qualified by inspection after, start installation and reinforce riser and help template die plate, reinforce riser and help
Plate graded casting concrete, need to pay special attention to the perpendicularity of template, flatness and faulting of slab ends control in construction；
7.4 concreting
Before concreting, template position deviation, cross dimensions, surface smoothness, absolute altitude and bracing reinforcement should be checked
Situation etc., pouring for concrete can be carried out after passed examination；
Height of the discharging opening away from concreting face layer-by-layer distribution, has poured one layer no more than 1m during casting concrete
Pour the second layer again afterwards, paving thickness is not preferably greater than 30cm；
Concreting should be carried out continuously, and must not be interrupted, and when pause interval for some reason, its intermittent time should be less than front layer and mix
Coagulate the presetting period of soil；, should be by pouring interrupt processing when more than the intermittent time is allowed, while answer indwelling construction joint, construction joint
Plane should be with the axis perpendicular of structure；
After concreting, it should repair in time, floating concrete exposed surface；
7.5 supports, form removable
With the related request of 5.5 form removables；
7.6 spilled water holes are installed
When installation reinforces riser, helps template die plate, while spilled water hole is installed, spilled water hole is installed in strict accordance with design drawing lateral
Model is required to carry out, and sluicing pitch of holes can be set by 2m~3m, in installation process it is noted that setting and the spilled water hole slope of rubble anti-filter
The angle of degree；
7.7 wall body subsiding cracks are constructed
With the related request of 5.6 subsiding cracks construction；
8th, the back of the body backfill construction of riser wall is reinforced
Riser wall body to be reinforced, help plate and laterally the concrete strength of decompression off-load flat board reaches the 75% of design strength
After carry out fill construction, filler using B groups filler (well gather materials, including dysgeogenous magma stone, the erratic boulder of disproportionately graded
Soil, land pebble, gravelly soil, circle gravel soil, dust soil, gravelly sand, coarse sand, middle sand, fine grained soil content 15%~30% erratic boulder it is native,
Land pebble, gravelly soil, circle gravel soil, dust soil and fine sand, glutinous sand, emery dust soil, sand clay) or its above rank filler, sluicing
Hole water inlet is wrapped up using permeable geotextiles, installs 5cm thickness plastic draining sheet materials in time, then carries out wall by reinforcing riser height
Placement in layers is constructed afterwards, individual layer filled slope≤300mm, and mechanically or manually compaction in layers, backfill compacting system are utilized after filling
Number >=0.94, it is noted that finished product protection during filling.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (6)
1. a kind of heightening and consolidation structure of in-service reinforced concrete retaining wall, it is characterised in that kept off including in-service armored concrete
Cob wall, the in-service reinforced concrete retaining wall top, which is set, reinforces riser, the in-service reinforced concrete retaining wall with it is described
Reinforce riser to connect in a manner of bar planting, the bottom for reinforcing riser sets laterally decompression off-load flat board, and the transverse direction subtracts
Pressure off-load flat board is located at the in-service reinforced concrete retaining wall wall back side, and the laterally decompression off-load flat board bottom sets note
Slurry pipe or mini pile；It is additionally provided between the reinforcing riser and the laterally decompression off-load flat board and helps plate.
A kind of 2. heightening and consolidation structure of in-service reinforced concrete retaining wall according to claim 1, it is characterised in that institute
State spacing≤300 of steel pipe or reinforcing bar in bar planting mode × 300mm.
A kind of 3. heightening and consolidation structure of in-service reinforced concrete retaining wall according to claim 1, it is characterised in that institute
Spacing≤1.5m between Grouting Pipe adjacent tubes is stated, in quincunx or arranged in squares.
4. a kind of in-service reinforced concrete retaining wall according to claims 1 to 3 any one claim is increased
Fixing structure, it is characterised in that it is described that to help plate be triangular structure, its two short sides respectively with the reinforcing riser and the transverse direction
Depressurize the connection of off-load flat board.
5. a kind of heightening and consolidation method of in-service reinforced concrete retaining wall, it is using the heightening and consolidation knot described in claim 1
Structure, it is characterised in that comprise the following steps：
(1) preparation of construction：According to the foundation of in-service reinforced concrete retaining wall, structure type, wall the back of the body banket compactness and
Bearing capacity, construction parameter is obtained, and carry out the preparation of place, construction material and plant equipment；
(2) in-service reinforced concrete retaining wall wall carries on the back reinforcing of banketing：Using high-pressure slip-casting or mini pile mode to in-service reinforcing bar
The concrete retaining wall wall back of the body, which bankets, to be reinforced；
(3) foundation trench excavates：The foundation trench that the in-service reinforced concrete retaining wall wall back of the body bankets excavates, and removes surflaes, for laterally decompression
The construction of off-load flat board provides the scope of operation；
(4) off-load flat board is laterally depressurized in construction：The reinforcing bar of off-load flat board, pouring molding are laterally depressurized in installation；
(5) bar planting is constructed：Bar planting construction is carried out at the top of in-service reinforced concrete retaining wall；
(6) construction reinforcement riser and plate is helped：Installation reinforces riser and helps the reinforcing bar of plate, pouring molding；
(7) back of the body backfill of riser wall is reinforced：Riser wall body to be reinforced, help plate and laterally the concrete strength of decompression off-load flat board reaches
To after the 75% of design strength, carried on the back using the in-service reinforced concrete retaining wall wall of filler back-filling in layers.
A kind of 6. heightening and consolidation method of in-service reinforced concrete retaining wall according to claim 5, it is characterised in that institute
State soil thickness≤300mm that individual layer backfills in step (7), backfill compacting factor >=0.94.
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| CN108661069A (en) * | 2018-04-02 | 2018-10-16 | 山东建筑大学 | Close on the wall piled anchor composite structure and method of old Retaining Wall Reinforcement under the load of river road surface |
| CN108729468A (en) * | 2018-06-11 | 2018-11-02 | 中国电建集团贵阳勘测设计研究院有限公司 | Rock foundation road retaining wall heightening treatment method |
| CN109779278A (en) * | 2019-01-16 | 2019-05-21 | 广东工业大学 | A kind of ruggedized construction of cities and towns retaining wall |
| CN109958101A (en) * | 2019-04-23 | 2019-07-02 | 上海勘测设计研究院有限公司 | Reinforcement of retaining wall for heightening and consolidation original retaining wall |
| CN111291492A (en) * | 2020-02-20 | 2020-06-16 | 中铁二院工程集团有限责任公司 | Method for improving anti-skid and anti-overturning safety of existing weight-balance retaining wall |
| CN112832191A (en) * | 2021-01-13 | 2021-05-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Dyke heightening and reinforcing structure |
| CN114658045A (en) * | 2022-04-15 | 2022-06-24 | 福州市勘测院有限公司 | Construction method for repairing active retaining wall |
| CN115126282A (en) * | 2022-07-25 | 2022-09-30 | 中国十九冶集团有限公司 | Post-reinforcement method for permanent support of adjacent important building structures |
| CN117449347A (en) * | 2023-12-18 | 2024-01-26 | 山东建勘集团有限公司 | High-filling existing arm-supporting type retaining wall connection reinforcing structure and construction method |
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| CN108661069A (en) * | 2018-04-02 | 2018-10-16 | 山东建筑大学 | Close on the wall piled anchor composite structure and method of old Retaining Wall Reinforcement under the load of river road surface |
| CN108729468A (en) * | 2018-06-11 | 2018-11-02 | 中国电建集团贵阳勘测设计研究院有限公司 | Rock foundation road retaining wall heightening treatment method |
| CN109779278A (en) * | 2019-01-16 | 2019-05-21 | 广东工业大学 | A kind of ruggedized construction of cities and towns retaining wall |
| CN109958101A (en) * | 2019-04-23 | 2019-07-02 | 上海勘测设计研究院有限公司 | Reinforcement of retaining wall for heightening and consolidation original retaining wall |
| CN111291492A (en) * | 2020-02-20 | 2020-06-16 | 中铁二院工程集团有限责任公司 | Method for improving anti-skid and anti-overturning safety of existing weight-balance retaining wall |
| CN112832191A (en) * | 2021-01-13 | 2021-05-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Dyke heightening and reinforcing structure |
| CN114658045A (en) * | 2022-04-15 | 2022-06-24 | 福州市勘测院有限公司 | Construction method for repairing active retaining wall |
| CN114658045B (en) * | 2022-04-15 | 2024-03-01 | 福州市勘测院有限公司 | Active retaining wall repairing construction method |
| CN115126282A (en) * | 2022-07-25 | 2022-09-30 | 中国十九冶集团有限公司 | Post-reinforcement method for permanent support of adjacent important building structures |
| CN117449347A (en) * | 2023-12-18 | 2024-01-26 | 山东建勘集团有限公司 | High-filling existing arm-supporting type retaining wall connection reinforcing structure and construction method |
| CN117449347B (en) * | 2023-12-18 | 2024-03-22 | 山东建勘集团有限公司 | High-filling existing buttress type retaining wall connection reinforcing structure and construction method |
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