CN210507517U - Combined member suitable for retaining wall heightening - Google Patents
Combined member suitable for retaining wall heightening Download PDFInfo
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- CN210507517U CN210507517U CN201921103005.1U CN201921103005U CN210507517U CN 210507517 U CN210507517 U CN 210507517U CN 201921103005 U CN201921103005 U CN 201921103005U CN 210507517 U CN210507517 U CN 210507517U
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Abstract
A combined component suitable for heightening a retaining wall comprises an embankment and the retaining wall, wherein the retaining wall is positioned on one side of the embankment; excavating on the embankment to form a step-shaped groove, wherein the step-shaped groove is connected with the top of the retaining wall; the top of the retaining wall is provided with a concrete foundation which is positioned in the step-shaped groove, and the concrete foundation is provided with a concrete panel; the step-shaped groove is filled with a foam concrete layer, and the foam concrete layer extends to the concrete panel; an embankment filler is wrapped outside the foam concrete layer, and the top of the embankment filler is flush with the top of the concrete panel; compared with the prior art, combine micro pile, foam concrete and retaining wall heightening technology, make it become an organic whole, promoted the height and the stability of retaining wall, can satisfy existing retaining wall and increase the requirement, adopt micro pile technology simultaneously for vibration and noise are less during the construction, and all influence very little to the structure of retaining wall and the disturbance on ground.
Description
Technical Field
The utility model belongs to the technical field of the retaining wall increases, especially, relate to a composite member suitable for retaining wall increases.
Background
Wall structures which are built to bear the lateral pressure of a soil body in order to prevent roadbed filling or collapse of a soil body on a hillside in the construction of buildings, highways, railways, mines, water conservancy and other projects are generally called retaining walls at present. The reasonable arrangement of the retaining wall can effectively reduce the slope releasing range of the embankment or cutting slope, greatly reduce the quantity of earth and rockfill projects, correspondingly reduce the difficulty of policy handling such as land acquisition and removal and the like, and has very important effect in engineering application. The classification of retaining walls varies according to the type, wherein cantilever retaining walls and gravity retaining walls have the widest range of applications relative to other types of retaining walls.
With the continuous and rapid development of the people economy and urbanization, the requirements of people on the quality of life, the site environment and the like are higher and higher. For example, for newly built or modified construction engineering, highway engineering and the like, due to staged development, the elevation of a site or a road general map is continuously increased, so that the height of an original retaining wall is continuously increased, the original retaining wall is not suitable any more, the safety and the stability of the original retaining wall cannot meet the current situation requirements, and certain risks are brought to the lives and properties of the country and people. The traditional solution is to demolish and rebuild the original retaining wall, but the method has the disadvantages of large project amount, long construction period and high construction cost, and meanwhile, the original side slope is easy to be unstable in the demolishing process, thereby bringing certain danger. By adopting the related technology, the retaining wall is heightened on the premise of not dismantling the original retaining wall, so that the manufacturing cost can be saved and the construction period can be shortened; on the other hand, it can guarantee that the safety of original retaining wall continues to use, reduces the safety risk that demolishs the in-process and bring. Generally, corresponding heightening is carried out to existing retaining wall, and its technical degree of difficulty is great relatively, and various diseases and bring certain potential safety hazard very easily appear in existing retaining wall reinforcement not in place to bring danger to people's life and property. Therefore, it is necessary to find a combined structure for heightening the retaining wall, which can not only ensure the stability of the side slope of the original embankment, but also has the advantages of high construction speed, good construction quality, relatively low construction cost, and the like.
The Chinese patent with publication number CN 106120501A proposes a widening and heightening structure of the existing retaining wall road section and a construction method, firstly, the original embankment side slope is excavated to form a step shape, then the outer side of the original retaining wall is provided with a cast-in-situ pile and an upright post, meanwhile, cast-in-situ slabs are poured on the retaining wall and the upright post, the outer side of the cast-in-situ slabs is provided with an L-shaped precast slab, and finally, the step shape is built back by adopting bubble concrete. The structure adopts the bubble concrete back-building technology, has the characteristics of high construction speed, good construction quality, reduction of the self weight of the embankment and the like, and can be effectively applied to widening treatment of the roadbed at the existing retaining wall section. However, this structure is not suitable for the operating mode that because place or road total map elevation are constantly increased, cause original retaining wall height to constantly increase.
The Chinese patent with publication number CN 107447778A provides a heightening and reinforcing structure and a method for an in-service reinforced concrete retaining wall, which report seven steps of construction preparation, filling and reinforcing of the back of the in-service reinforced concrete retaining wall, excavation of a foundation trench, construction of a transverse pressure-reducing and unloading flat plate, construction of a bar planting construction, construction of a reinforcing vertical plate and a supporting plate, and backfill of the wall back of the reinforcing vertical plate. The structure and the method ensure the safety and the stability of the original side slope on one hand, can effectively save the construction period and reduce the construction cost on the other hand, and can better heighten and reinforce the in-service reinforced concrete retaining wall. However, the method only performs heightening and reinforcing treatment on the in-service reinforced concrete retaining wall, and the common gravity retaining wall or counterfort retaining wall is not involved; meanwhile, the method adopts a high-pressure grouting or micro-pile mode to reinforce the retaining wall back filling, and the wall back filling in the actual engineering is always a water-permeable material, so that the high-pressure grouting is easy to generate slurry leakage to increase the engineering cost.
In view of this, to the problem such as because place or road overall graph elevation constantly increase, cause original barricade height to constantly increase, the utility model an existing retaining wall that construction speed is fast, construction quality is good, stability can be good increases integrated configuration and construction method is urgently needed at present, and it has important engineering meaning and practical value.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome the defect among the above-mentioned prior art, provide a safe and reliable, simple structure, the convenient retaining wall of construction increases integrated configuration.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a combined component suitable for heightening a retaining wall comprises an embankment and the retaining wall, wherein the retaining wall is positioned on one side of the embankment; excavating on the embankment to form a step-shaped groove, wherein the step-shaped groove is connected with the top of the retaining wall; the top of the retaining wall is provided with a concrete foundation which is positioned in the step-shaped groove, and the concrete foundation is provided with a concrete panel; the step-shaped groove is filled with a foam concrete layer, and the foam concrete layer extends to the concrete panel; the outside of the foam concrete layer is wrapped with embankment filler, and the top of the embankment filler is flush with the top of the concrete panel.
As the utility model discloses a preferred scheme, the foam concrete layer includes first foam concrete layer and second foam concrete layer, and first foam concrete layer is located step form recess, and first foam concrete layer top and concrete foundation bottom surface parallel and level, second foam concrete layer are located first foam concrete layer top.
As an optimized scheme of the utility model, second foam concrete layer fills along concrete panel's direction of height, and second foam concrete layer top is located concrete panel top below, and second foam concrete layer is formed with cement mortar plastering.
As an optimized scheme of the utility model, first foam concrete layer and second foam concrete layer are step, and the steel mesh piece has been laid to first foam concrete layer and the interior successive layer of second foam concrete layer.
As an optimized scheme of the utility model, concrete foundation bottom is equipped with a plurality of miniature piles of downwardly extending, and a plurality of miniature piles pass the retaining wall and link to each other with the embankment.
As an optimized scheme of the utility model, the micropile includes steel casing pipe and stock reinforcing bar, and the steel casing pipe is hollow structure, and the stock reinforcing bar is located the steel casing pipe, and the stock reinforcing bar top extends to outside the steel casing pipe.
As a preferred scheme of the utility model, be equipped with the slip casting body in the steel casing pipe, the slip casting body parcel sets up outside the stock reinforcing bar, extends to the stock reinforcing bar outside the steel casing pipe and is located and forms the structure of buckling between the stock reinforcing bar in the steel casing pipe.
A construction method of a combined member suitable for heightening a retaining wall comprises the following steps:
step A: acquiring relevant parameters and simultaneously carrying out site-related construction preparation according to foundation, structure form, wall back filling compactness, bearing capacity, relevant geological survey reports and the like of the retaining wall;
and B: downwards excavating a step-shaped groove at the top of the joint of the embankment and the retaining wall to a designed elevation position;
and C: determining the drilling position of the micro pile at the step-shaped groove, drilling according to the design depth, and performing hole cleaning operation on the micro pile drilling, wherein the arrangement distance between adjacent micro piles is less than or equal to 100cm multiplied by 300cm, and a plurality of micro piles are arranged in a rectangular shape;
step D: inserting a steel sleeve with a hole into the drilling position of the miniature pile;
step E: inserting anchor rod reinforcing steel bars processed according to design requirements into the steel sleeve, and grouting the holes until the grouting body meets the design requirements;
step F: pouring a first foam concrete layer in the step-shaped groove, pouring the first foam concrete layer to the bottom surface of the concrete foundation, and paving steel wire mesh sheets layer by layer in the layer-by-layer pouring process of the first foam concrete layer;
step G: after the strength of the first foam concrete layer reaches the design requirement, carrying out structural construction on a concrete foundation and a concrete panel;
step H: after the strength of the concrete foundation and the concrete panel reaches the design requirement, a second foam concrete layer is poured to the designed elevation, and steel wire mesh sheets are paved layer by layer in the layer-by-layer pouring process of the second foam concrete layer;
step I: plastering the top of the second foam concrete layer with cement mortar;
step J: and backfilling embankment fillers on the top of the cement mortar plastering surface and compacting layer by layer.
As a preferred scheme of the utility model, the size that micro pile bottom embedding embankment in step C is not less than 300 cm.
As an optimized scheme of the utility model, the size of stock reinforcing bar embedding concrete foundation in the step E is not less than 10cm, stock reinforcing bar top buckle and with concrete foundation in the steel bar connection.
The beneficial effects of the utility model are that, compare with prior art:
1. the utility model discloses combine micro pile, foam concrete and existing retaining wall heightening technology, make it become an organic whole, promoted the height and the stability of existing retaining wall, can satisfy existing retaining wall and increase the requirement.
2. The utility model adopts the micro-pile technology, on one hand, the vibration and noise during construction are smaller, and the disturbance to the structure of the retaining wall and the ground is less influenced because the size of the micro-pile is smaller; on the other hand, the miniature pile has the characteristics of convenience and quickness in construction, short period, low manufacturing cost and the like, and in addition, the miniature pile can enhance the overall stability of the embankment side slope to a certain degree and avoid the defect that the miniature pile in the embankment side slope is easy to leak slurry.
3. The utility model adopts the foam concrete, the foam concrete has the characteristics of light weight, high strength, high construction speed, reliable construction quality and the like, and the adoption of the technology reduces the lateral soil pressure of the existing retaining wall on one hand and increases the anti-overturning property and the stability of the retaining wall; on the other hand, it has improved existing retaining wall back of the body atress performance, has strengthened retaining wall's overall stability.
4. Demolish the processing mode of rebuilding with the tradition and compare, the utility model discloses avoided demolising the time-consuming and expensive and demolish the danger that the easy unstability of embankment side slope in-process that the rebuilding scheme caused, the utility model discloses practice thrift the time limit for a project and reduced engineering cost to a certain extent.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the connection of a micropile to a concrete foundation;
FIG. 3 is a cross-sectional view of a micropile;
reference numbers in the figures: the concrete foundation comprises a retaining wall 1, an embankment 2, a step-shaped groove 3, a micro pile 4, a foam concrete layer 5, a first foam concrete layer 5-1, a second foam concrete layer 5-2, a steel wire mesh 6, a concrete foundation 7, a concrete panel 8, a cement mortar plastering surface 9, embankment fillers 10, a micro pile drilling hole 11, a steel sleeve 12, an anchor rod reinforcing steel bar 13 and grouting bodies 14.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1-3, a combined member suitable for the elevation of a retaining wall comprises an embankment 2 and a retaining wall 1, wherein the retaining wall 1 is positioned at one side of the embankment 2; a step-shaped groove 3 is formed on the embankment 2 by excavation, and the step-shaped groove 3 is connected with the top of the retaining wall 1; the top of the retaining wall 1 is provided with a concrete foundation 7, the concrete foundation 7 is positioned in the step-shaped groove 3, and the concrete foundation 7 is provided with a concrete panel 8; the step-shaped groove 3 is filled with a foam concrete layer 5, and the foam concrete layer 5 extends to a concrete panel 8; the outside of the foam concrete layer 5 is wrapped with embankment 2 filler, and the top of the embankment 2 filler is flush with the top of the concrete panel 8.
Retaining wall 1 is cantilever type, counterfort or gravity type retaining wall, and in 1 bottom embedding embankment 2 of retaining wall, 7 levels of concrete foundation set up, and 7 upper surfaces of concrete foundation and 1 top parallel and level of retaining wall, 7 one side of concrete foundation offset with retaining wall 1.
One side of the step-shaped groove 3 connected with the retaining wall 1 is of a vertical structure, the other side of the step-shaped groove 3 connected with the retaining wall 1 is of a step-shaped step, the downward size of the step-shaped groove 3 along the vertical direction gradually decreases, and the step-shaped groove 3 is internally used for filling the first foam concrete layer 5-1, so that the first foam concrete layer 5-1 at the step-shaped position is abutted to the embankment 1, and the stability of the first foam concrete layer 5-1 is improved.
The foam concrete layer 5 comprises a first foam concrete layer 5-1 and a second foam concrete layer 5-2, the first foam concrete layer 5-1 is located in the step-shaped groove 3, the top of the first foam concrete layer 5-1 is flush with the bottom surface of the concrete foundation 7, and the second foam concrete layer 5-2 is located above the first foam concrete layer 5-1.
The filling size of the first foam concrete layer 5-1 is matched with the size of the step-shaped groove 3, the second foam concrete layer 5-2 is filled on the first foam concrete layer 5-1, and the second foam concrete layer 5-2 is also of a step-shaped structure.
The second foam concrete layer 5-2 is filled along the height direction of the concrete panel 8, the top of the second foam concrete layer 5-2 is positioned below the top of the concrete panel 8, a cement mortar plastering surface 9 is formed at the top of the second foam concrete layer 5-2, the first foam concrete layer 5-1 and the second foam concrete layer 5-2 are step-shaped steps, and steel wire mesh sheets 6 are laid in the first foam concrete layer 5-1 and the second foam concrete layer 5-2 layer by layer.
7 bottoms of concrete foundation are equipped with downwardly extending's a plurality of miniature stake 4, and the quantity of a plurality of miniature stake 4 designs according to actual conditions, and the vertical setting of a plurality of miniature stake 4, and a plurality of miniature stake 4 pass 1 bottom base of retaining wall and link to each other with embankment 2, and 4 tops of a plurality of miniature stake are embedded in concrete foundation 7, and a plurality of miniature stake 4 are located same level.
Miniature stake 4 includes steel casing 12 and stock reinforcing bar 13, steel casing 12 is hollow structure, stock reinforcing bar 13 is located steel casing 12, and stock reinforcing bar 13 top extends outside steel casing 12, embedded in concrete foundation 7 at steel casing 12 top, be equipped with slip casting 14 in the steel casing 12, slip casting 14 parcel sets up outside stock reinforcing bar 13, under the effect of slip casting 14, make the remaining steel casing 12 fixed connection of stock reinforcing bar 13, it forms the bending structure to extend to the stock reinforcing bar 13 outside steel casing 12 and be located between the stock reinforcing bar 13 of steel casing 12, it links to each other with the reinforcing bar in the concrete foundation 7 to extend to the stock reinforcing bar 13 outside steel casing 12, improve the stability between miniature stake 4 and the concrete foundation 7.
In the actual production and use process, the method comprises the following steps:
step A: and acquiring relevant parameters and simultaneously carrying out site-related construction preparation according to the foundation, the structural form, the filling compactness of the wall back, the bearing capacity, the relevant geological survey report and the like of the retaining wall 1.
And B: step-shaped groove 3 is dug downwards at the top of the junction of embankment 2 and retaining wall 1, one side of step-shaped groove 3 is communicated with retaining wall 1, step-shaped groove 3 forms a step shape relative to the other side connected with retaining wall 1, and downward extension size of step-shaped groove 3 is gradually reduced, and the step-shaped groove is dug to the designed elevation position.
And C: the drilling position of the miniature piles 4 is determined at the step-shaped groove 3, the miniature pile drilling 11 is conducted on the embankment 1, the miniature pile drilling 11 is close to the retaining wall 1, the miniature pile drilling 11 is drilled according to the designed depth, the miniature pile drilling 11 is cleaned, the arrangement distance between every two adjacent miniature piles 4 is not more than 100cm multiplied by 300cm, the miniature piles 4 are arranged in a rectangular mode, and the size of the miniature piles 4 embedded into the embankment 2 is not less than 300 cm.
Step D: and inserting a steel sleeve 12 with a hole at the position of the micro-pile drilled hole 11, wherein the size of the steel sleeve 12 is matched with that of the micro-pile drilled hole 11.
Step E: the anchor rod reinforcing steel bars 13 which are processed according to design requirements are inserted into the steel sleeve 12, grouting is conducted on the holes until the grouting body 14 meets the design requirements, the anchor rod reinforcing steel bars 13 are fixedly connected with the steel sleeve 12 under the action of the grouting body 14, the anchor rod reinforcing steel bars 13 extending out of the top of the steel sleeve 12 are bent, the size of the anchor rod reinforcing steel bars 13 embedded into the concrete foundation 7 is not smaller than 10cm, and the tops of the anchor rod reinforcing steel bars 13 are bent and connected with reinforcing steel bars in the concrete foundation 7.
Step F: and (3) pouring a first foam concrete layer 5-1 in the step-shaped groove 3, pouring the first foam concrete layer 5-1 to the bottom surface of the concrete foundation 7, and paving the steel wire mesh sheets 6 layer by layer in the layer-by-layer pouring process of the first foam concrete layer 5-1.
Step G: after waiting that first foam concrete layer 5-1 intensity reaches the designing requirement, carry out the structure construction of concrete foundation 7 and concrete panel 8, the reinforcing bar links to each other with the stock reinforcing bar 13 that extends to the outer of steel casing 12 top in the concrete foundation 7, simultaneously 7 upper surface of concrete foundation and 1 top parallel and level of retaining wall, 7 one side of concrete foundation still offsets with retaining wall 1, pour in concrete foundation 7 in the concrete panel 8 bottom, make concrete foundation 7 and 8 fixed connection of concrete panel, and concrete panel 8 is vertical setting.
Step H: and after the strength of the concrete foundation 7 and the concrete panel 8 reaches the design requirement, pouring the second foam concrete layer 5-2 to the designed elevation, and paving the steel wire mesh sheets 6 layer by layer in the layer-by-layer pouring process of the second foam concrete layer 5-2.
Step I: and (3) plastering 9 the top of the second foam concrete layer 5-2 by using cement mortar.
Step J: and backfilling the filling of the embankment 2 at the top of the cement mortar plastering surface 9 and compacting layer by layer.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: the concrete foundation comprises terms such as a retaining wall 1, an embankment 2, a step-shaped groove 3, a micro pile 4, a foam concrete layer 5, a first foam concrete layer 5-1, a second foam concrete layer 5-2, a steel wire mesh 6, a concrete foundation 7, a concrete panel 8, a cement mortar coating 9, embankment fillers 10, a micro pile drilling hole 11, a steel sleeve 12, an anchor rod steel bar 13, a grouting body 14 and the like, but the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (7)
1. A combined component suitable for heightening a retaining wall comprises an embankment (2) and the retaining wall (1), wherein the retaining wall (1) is positioned on one side of the embankment (2); the method is characterized in that a step-shaped groove (3) is formed by excavating on the embankment (2), and the step-shaped groove (3) is connected with the top of the retaining wall (1); the top of the retaining wall (1) is provided with a concrete foundation (7), the concrete foundation (7) is positioned in the step-shaped groove (3), and the concrete foundation (7) is provided with a concrete panel (8); a foam concrete layer (5) is filled in the step-shaped groove (3), and the foam concrete layer (5) extends to the concrete panel (8); the outside of the foam concrete layer (5) is wrapped with embankment (2) filler, and the top of the embankment (2) filler is flush with the top of the concrete panel (8).
2. A combined member suitable for heightening a retaining wall according to claim 1, wherein said foamed concrete layer (5) comprises a first foamed concrete layer (5-1) and a second foamed concrete layer (5-2), the first foamed concrete layer (5-1) is positioned in the stepped recess (3), the top of the first foamed concrete layer (5-1) is flush with the bottom surface of the concrete foundation (7), and the second foamed concrete layer (5-2) is positioned above the first foamed concrete layer (5-1).
3. A composite member adapted for heightening a retaining wall according to claim 2, wherein said second foamed concrete layer (5-2) is filled in a height direction of the concrete panel (8), a top of the second foamed concrete layer (5-2) is located below a top of the concrete panel (8), and the second foamed concrete layer (5-2) is formed with a cement mortar plastering surface (9).
4. The combined member suitable for heightening a retaining wall according to claim 2, wherein the first foamed concrete layer (5-1) and the second foamed concrete layer (5-2) are both step-shaped steps, and the steel wire mesh sheets (6) are laid in the first foamed concrete layer (5-1) and the second foamed concrete layer (5-2) layer by layer.
5. A combined member for heightening a retaining wall according to claim 1 wherein the concrete foundation (7) is provided at the bottom thereof with a plurality of micro-piles (4) extending downward, the plurality of micro-piles (4) being connected to the embankment (2) through the retaining wall (1).
6. A combined member suitable for heightening a retaining wall according to claim 5, wherein the micro pile (4) comprises a steel sleeve (12) and anchor bars (13), the steel sleeve (12) is of a hollow structure, the anchor bars (13) are positioned in the steel sleeve (12), and the tops of the anchor bars (13) extend out of the steel sleeve (12).
7. A combined member suitable for heightening a retaining wall according to claim 6, wherein a grouting body (14) is arranged in the steel sleeve (12), the grouting body (14) is wrapped and arranged outside the anchor rod reinforcing steel bars (13), and a bent structure is formed between the anchor rod reinforcing steel bars (13) extending out of the steel sleeve (12) and the anchor rod reinforcing steel bars (13) positioned in the steel sleeve (12).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110374134A (en) * | 2019-07-15 | 2019-10-25 | 浙江交工集团股份有限公司 | A kind of combined member increased suitable for retaining wall and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374134A (en) * | 2019-07-15 | 2019-10-25 | 浙江交工集团股份有限公司 | A kind of combined member increased suitable for retaining wall and construction method |
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