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 PDF

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Publication number
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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CN
China
Prior art keywords
reinforced concrete
concrete retaining
riser
service
flat board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710845643.XA
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Chinese (zh)
Inventor
王玉奇
刘伟
吕龙
宫博
杨海平
惠锡强
陈浩
王人
王一人
董雪丰
姜玉爽
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ZHONGYE SHENKAN ENGINEERING TECHNOLOGY Co Ltd
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ZHONGYE SHENKAN ENGINEERING TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHONGYE SHENKAN ENGINEERING TECHNOLOGY Co Ltd filed Critical ZHONGYE SHENKAN ENGINEERING TECHNOLOGY Co Ltd
Priority to CN201710845643.XA priority Critical patent/CN107447778A/en
Publication of CN107447778A publication Critical patent/CN107447778A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/02Retaining or protecting walls
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/02Retaining or protecting walls
    • E02D29/0225Retaining or protecting walls comprising retention means in the backfill
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/02Retaining or protecting walls
    • E02D29/0258Retaining or protecting walls characterised by constructional features
    • E02D29/0275Retaining or protecting walls characterised by constructional features cast in situ

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

The heightening and consolidation structure and method of a kind of in-service reinforced concrete retaining wall
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.
CN201710845643.XA 2017-09-19 2017-09-19 The heightening and consolidation structure and method of a kind of in-service reinforced concrete retaining wall Pending CN107447778A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

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