CN111663493A - Repairing and reinforcing method suitable for block wharf after foundation damage - Google Patents
Repairing and reinforcing method suitable for block wharf after foundation damage Download PDFInfo
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- 230000006378 damage Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 239000004746 geotextile Substances 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
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- 238000010276 construction Methods 0.000 description 5
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- 238000010586 diagram Methods 0.000 description 3
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- 230000002787 reinforcement Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
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- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention discloses a method for repairing and reinforcing a block wharf after foundation damage, which comprises the following steps: 1) building a back-pressure geotextile bag at the front side of the wharf; 2) drilling a sand well outside the back-pressure earth bag pile, and draining and consolidating the foundation; 3) after the foundation settlement is stable, removing the back-pressure geotextile bag stacks in sections, and synchronously driving a row of filling piles I in sections, wherein the filling piles I penetrate through the bottom of the front edge of the wharf damage section; driving a row of cast-in-place piles II close to the front edge of the wharf on two sides of the wharf damage section; 4) carrying out slurry lifting on the foundation bed; 5) performing back pressure on the front side of the wharf to form a permanent back pressure structure; 6) the breast wall is leveled through the embedded steel bars on the outer side, and the bottom of the breast wall leveling structure is supported on the cast-in-place pile I; 7) the quay surface is leveled by repairing. The invention can not only restore the appearance of the wharf, but also meet the using functions of ship berthing and cargo loading and unloading, can also reinforce the foundation and increase the structural stability, and has obvious economical efficiency and environmental friendliness.
Description
Technical Field
The invention relates to a restoration and reinforcement method for a wharf, in particular to a restoration and reinforcement method for a block wharf after foundation damage.
Background
In recent years, the wharf engineering construction of China is rapidly developed and is in the leading level of the world. The block wharf is built by concrete blocks or masonry stones, is located on a foundation bed, can be backfilled at the rear of the blocks, is lapped outside the wharf to form a armor block and also serves as a breakwater, and is widely applied to port and coastal engineering. The block wharf belongs to a gravity type structure, and is maintained stably by means of structural gravity, so that the requirement on the bearing capacity of the foundation is high, and the block wharf is generally suitable for the foundation with good conditions such as hard clay and medium sand.
Although the foundation conditions of block terminals are generally good, structural instability due to insufficient foundation bearing capacity may still occur. China is located on the Pacific ocean earthquake zone, coastal low-intensity earthquakes frequently occur, the pressure of pore water in sandy soil is accumulated and increased, particularly under the geological condition that hard clay covers a middle sand layer, once accidental external force action or drainage channels occur, the phenomenon that the bearing capacity of a foundation is insufficient can occur, and structural instability is caused. In the marine environment, the load coupling effect such as wind, wave, stream can form the disturbance to hard clay ground, perhaps erode the front edge of the wharf formation, make hard clay ground appear possible bearing performance evolution. The two-piece stone of block pier below is laid not enough, when satisfying the draft requirement the wharf front edge excavation etc. in the work progress, all can lead to the foundation of block pier unstability to appear, especially at the too big, the less condition of pier section of block gravity, the foundation destruction degree is more serious.
After the foundation is damaged, uneven settlement can occur on the block wharf, and the foundation bed block stone or soil body on the front edge of the wharf is raised. Especially under the condition of serving as the breakwater behind the wharf, the block wharf can slide simultaneously, so that the block at the bottom slides at a larger distance, and the phenomenon of bulging belly is caused. Structural instability and foundation damage can influence the pier outward appearance, lead to boats and ships to berth at the block pier difficulty, hinder the goods to stack and the operation of handling machinery, still can bring bigger potential safety hazard when losing the use function. Dismantling and rebuilding are the root method for thoroughly solving the problem of foundation damage of the block wharf, but the cost is very high, and great environmental pollution and resource waste can be caused. Therefore, the method inherits the principle of resource saving and cost saving, provides the repairing and reinforcing method suitable for the block wharf after the foundation is damaged, can restore the appearance of the wharf, can meet the using functions of ship berthing and cargo loading and unloading, can reinforce the foundation, enhances the structural stability, and has important practical significance and application value.
Disclosure of Invention
The invention provides a method for repairing and reinforcing a block wharf after foundation damage, which can restore the appearance of the wharf, meet the using functions of ship berthing and cargo loading and unloading, reinforce the foundation and enhance the structural stability; compared with dismantling and rebuilding and the like, the method has obvious economical efficiency and environmental friendliness.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: the method for repairing and reinforcing the block wharf after foundation damage, wherein uneven settlement is generated at the foundation damage position of the block wharf, the foundation in front of the wharf is raised, the wharf slides forwards, and the sliding distance of the block at the bottom is larger, comprises the following steps: 1) piling back-pressure geotextile bags on the front side of the wharf damage section and the raised foundation to form a stack of the back-pressure geotextile bags leaning against the front side of the wharf damage section; 2) a row of sand wells parallel to the front edge of the wharf are arranged on the outer side of the back-pressure earth bag pile, and drainage consolidation is carried out on the damaged foundation; 3) after the foundation settlement is stabilized, dismantling the back-pressure geotextile bag stacks along the length direction of the wharf in a segmented manner, and synchronously driving a row of filling piles I in a segmented manner, wherein the filling piles I penetrate through the bottom of the front edge of the wharf damage section, and the bottom of the filling pile I is driven into a foundation bearing layer; driving a row of cast-in-place piles II close to the front edge of the wharf on two sides of the wharf damage section; 4) after the cast-in-place pile I and the cast-in-place pile II reach the design strength, slurry lifting is carried out on the foundation bed of the wharf damage section; 5) after the foundation bed after slurry rising reaches the design strength, carrying out back pressure on the foundation on the front side of the wharf damage section, and forming a permanent back pressure structure; 6) the front side breast wall of the dock destruction section is leveled through the outside embedded steel bars, and the bottom of the breast wall leveling structure is supported on the cast-in-place pile I; 7) the wharf surface of the damaged section of the wharf is repaired and leveled, so that the wharf surface is neat and reaches the original design elevation.
In the step 1), the back-pressure earthwork bag is a sand bag; the top stacking width is not less than the height of the wharf surface from the mud surface of the foundation, the stacking height is not less than 2/3 of the height of the wharf surface from the mud surface of the foundation, and the stacking is formed by stacking in sections along the length direction of the wharf.
And 2), the diameter of the sand well is 0.8-1.2 m, and the interval is the same as the length of the segments of the block wharf.
And 3), both the cast-in-place pile I and the cast-in-place pile II are cast by C40 concrete, the sizes are the same, the intervals are the same, the pile top elevations are the same, the diameters are 0.8-1.2 m, the pile top elevations are flush with the low water level limit, and the intervals are 2-10 times of the diameters of the cast-in-place piles I.
And 5) forming a permanent counter-pressure structure by throwing and filling 10-100 kg of stones, cementing the stones together by using a slurry lifting material, wherein the width of the top surface is not less than the height of the wharf surface from the mud surface of the foundation, and carrying out slope relief treatment on the outer side.
And 6), planting horizontal ribs on the front side of the wharf damage section, fixing a steel bar mesh perpendicular to the horizontal ribs, extending the bottom of the steel bar mesh to a very low water level, and pouring C40 concrete on the horizontal ribs and the steel bar mesh for repairing and leveling.
And 7), leveling the wharf surface layer of the wharf damage section by using C40 concrete.
The invention has the advantages and positive effects that: the back pressure geotechnical bag can prevent the block structure from continuing to slide and collapsing because of the emergence when setting up the sand pit drainage, and when the bored concrete pile construction, the back pressure geotechnical bag is demolishd section by section. The sand well is arranged, so that the problem of pore water pressure accumulation existing in a sand layer coated with hard clay can be solved, the foundation can be solidified through drainage, and the purpose of improving the bearing capacity of the foundation is achieved. The cast-in-place pile can prevent the block structure from continuously slipping and simultaneously support the breast wall leveling structure. The contact area between the foundation bed and the foundation can be increased by the slurry lifting of the foundation bed, the foundation bed rock blocks are prevented from continuously sinking, and the purpose of increasing the integral bearing capacity of the foundation bed is achieved. The permanent back pressure structure in front of the wharf can increase the corresponding front side back pressure of the block wharf, prevent the front soil body from uplifting due to block sinking and sliding and increase the foundation bearing capacity of the block wharf. The pouring and leveling outside the breast wall can restore the function of stopping and leaning on the ship for the wharf, and the filling pile is adopted to support the breast wall leveling structure, so that the wharf is integrally firmer. The wharf face leveling can restore the using function of the block wharf and repair a storage yard and a loading and unloading area which are deformed due to sinking. Compared with dismantling and rebuilding, the invention can restore the appearance of the wharf, can meet the using functions of ship berthing and cargo loading and unloading, can reinforce the foundation and increase the structural stability, has important practical significance and application value, and has obvious economy and environmental friendliness.
Drawings
FIG. 1 is a cross-sectional view of a structure of a block wharf foundation after being damaged;
FIG. 2 is a schematic diagram of step 1) of the present invention;
FIG. 3 is a schematic diagram of step 2) of the present invention;
FIG. 4 is a schematic view of the present invention for carrying out step 3);
FIG. 5 is a schematic view of the present invention for carrying out step 4);
FIG. 6 is a schematic view of the present invention for carrying out step 5);
FIG. 7 is a schematic view of step 6) of the present invention;
FIG. 8 is a schematic diagram of step 7) of the present invention.
In the figure: -a design structure, -a destruction structure, -a repair structure;
1. a block dock; 2. a foundation; 3. backfilling the rock blocks; 4. a wave wall; 5. a foundation bed; 6. back-pressing the geotextile bags for stacking; 7. a sand well; 8. filling a pile I; 9. a foundation bed after slurry rising; 10. a permanent back pressure arrangement; 11. a breast wall leveling structure; 12. and repairing the leveled wharf surface.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1, a block wharf 1 is seated on a foundation bed 5, the foundation bed 5 is fixed on a foundation 2, a backfill block stone 3 is arranged behind the block wharf 1, the lap joint facing block also serves as a breakwater, and a wave wall 4 is arranged at the top of the breakwater. Because of the local damage of the foundation 2, the block wharf 1 generates uneven settlement at the damaged part of the foundation 2, the foundation in front of the block wharf 1 is raised, the block wharf 1 slides forwards, and the sliding distance of the block at the bottom is larger, so that the phenomenon of bulging appears, the damaged part needs to be repaired and reinforced by adopting the following steps, please refer to fig. 2-8.
1) And (3) piling the back-pressure geotextile bags on the front side of the wharf damage section and the raised foundation to form a stack 6 of the back-pressure geotextile bags leaning against the front side of the wharf damage section. The back pressure geotextile bag stack 6 leans against the front side surface of the wharf damage section and the back pressure on the raised foundation, so that the wharf block body can be prevented from sliding again, and the foundation can be prevented from suddenly collapsing due to the fact that a sand well is arranged.
2) A row of sand wells 7 parallel to the front edge of the wharf are arranged on the outer side of the back-pressure geotextile bag stack 6, drainage consolidation is carried out on the damaged foundation, the pore water pressure of a sand layer coated with hard clay is reduced, and the problem of pore water pressure accumulation possibly existing in the sand layer is solved.
3) After the foundation settlement is stabilized, the back pressure earthwork bag stack 6 is removed in a segmented mode along the length direction of the wharf, a row of filling piles I8 is arranged in a segmented mode in a synchronous mode, the filling piles I8 penetrate through the bottom of the front edge of the wharf damage section, the bottom of the filling piles I8 is driven into the bearing layer of the foundation 1, and the wharf is anchored on the foundation 2 to prevent the wharf from continuously sliding. And two sides of the wharf damage section are respectively provided with a row of cast-in-place piles II close to the front edge of the wharf for reinforcing the adjacent section and preventing the adjacent section from being influenced by the damage section to generate forward sliding damage.
The geotextile bag stack 6 is removed section by section, the filling pile I8 is driven section by section, namely, the geotextile bag stack is removed section by section, the filling pile I8 is driven, then the geotextile bag stack is removed section by section, the filling pile I8 is driven, and the operation is circulated until the driving of all the filling piles I8 is completed. The construction method can avoid the overlarge disturbance to the wharf damage section and aggravate the damage degree.
4) After bored concrete pile I8 and bored concrete pile II reach design intensity, rise the thick liquid to wharf destruction section bed 5, the purpose is the reinforcement bed, improves the whole bearing capacity of bed.
5) After the foundation bed 9 after slurry rising reaches the design strength, the foundation on the front side of the wharf damage section is subjected to back pressure, and a permanent back pressure structure 10 is formed and used for improving the foundation bearing capacity safety coefficient to a safe interval, and the ship stop is not influenced by the height of the back pressure structure.
6) The pier destruction section front side breast wall is leveled through outside bar planting, and the bottom of breast wall structure 11 of making level supports on bored concrete pile I8. The purpose of the leveling breast wall is to facilitate the ship to stop and recover the use function of the block wharf.
7) The wharf face 12 after repairing and leveling is neat and reaches the original design elevation by repairing the wharf face of the damaged section of the leveling wharf so as to recover the use function of the block wharf, and the block wharf is repaired and reinforced after foundation damage is realized.
The more specific method of the above steps:
in this embodiment, in step 1), the back-pressure geotextile bag is a sand bag, and the calculated and relatively safe stack size is as follows: the top stacking width of the back-pressure geotextile bag stack 6 is not less than the height of the wharf surface from the mud surface of the foundation 2, the stacking height is not less than 2/3 of the height of the wharf surface from the mud surface of the foundation 2, and the stacking is carried out by adopting a method of stacking in sections along the length direction of the wharf, so that the subsection dismantling is convenient.
In the embodiment, the diameter of the sand well 7 in the step 2) is generally 0.8-1.2 m, the interval is the same as the length of the segments of the block wharf 1, and the sand well is drilled to the bottom of the sand layer of the foundation 2. And (3) monitoring the structural deformation and settlement of the block wharf 1 in real time after the sand well 7 is arranged, and recording corresponding data until the structural deformation and settlement of the block wharf 1 tend to be stable.
In this embodiment, in step 3), the cast-in-place pile i 8 and the cast-in-place pile ii are both cast with C40 concrete, and have the same size, the same spacing, the same pile top elevation, and the diameter of 0.8 to 1.2m in general, the pile top elevation is flush with the low water level limit, and the spacing is 2 to 10 times the diameter of the cast-in-place pile i 8.
In this embodiment, in the step 4), when slurry is lifted from the wharf damaged section foundation bed, firstly, the foundation bed 5 is washed by high-pressure water, the sludge in the foundation bed 5 in the slurry lifting range is required to be washed clean, the reverse osmosis filter cloth and the water stop connecting piece on the side surface of the slurry lifting area are placed in a diving manner, and slurry lifting pipes and observation pipes with the diameter of 50-75 cm and the diameter of @ 100-150 cm are embedded or drilled. Then, the mortar is continuously and gradually pressed and poured from one end to the other end. Grouting materials are adopted for slurry lifting, during construction, grouting equipment is used for jetting the grouting materials through a slurry pipe at high pressure, so that slurry fills gaps among the stones of the foundation bed 5 to form a new cementing body, a diver carries out underwater slurry surface observation, and the slurry pipe is pulled out after construction is finished. And (5) performing core drilling and sampling on 14-28 days after the slurry lifting is finished, detecting the strength of the core piece, and judging that the standard of the slurry lifting concrete is met when the strength reaches C15.
In the embodiment, in the step 5), the permanent back pressure structure 10 is formed by throwing and filling 10-100 kg of block stones on the front side of the wharf damage section, and is cemented together by a pulp lifting material. The permanent back pressure structure has top width not less than the height of the wharf surface from the 2 mud surface of the foundation, and the slope surface structure is adopted to perform slope relief treatment on the outer side of the raised foundation by back pressure. When the permanent back pressure structure 10 for grouting is lifted, grouting pipes and observation pipes with phi of 50-75 cm and @ 100-150 cm are buried or punched in the back pressure structure, and grouting is performed from one end to the other end. And (5) performing core drilling and sampling on 14-28 days after the slurry lifting is finished, detecting the strength of the core piece, and judging that the required standard of the slurry lifting concrete is met when the strength of the core piece is more than C15.
In this embodiment, in step 6), a horizontal bar is planted on the front side of the dock destruction section, the diameter of the horizontal bar is phi 16mm to phi 20mm, a steel bar mesh is vertically fixed on the horizontal bar, the diameters of a transverse steel bar and a longitudinal steel bar of the steel bar mesh are phi 16mm to phi 20mm, and the distance between two adjacent transverse steel bars and the distance between two adjacent longitudinal steel bars are preferably 50 times the diameter of the steel bar. The bottom of the steel mesh sheet is preferably extended to a low water level. And C40 concrete is adopted to repair and level the outer side of the wharf damage section.
In this embodiment, step 7) is performed, and the wharf surface layer of the wharf damage section is leveled by using C40 concrete.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (7)
1. A method for repairing and reinforcing a block wharf after foundation damage, wherein uneven settlement is generated at the foundation damage position of the block wharf, the foundation in front of the wharf is raised, the wharf slides forwards, the sliding distance of a block at the bottom is larger,
the block wharf repairing and reinforcing method is characterized by comprising the following steps:
1) piling back-pressure geotextile bags on the front side of the wharf damage section and the raised foundation to form a stack of the back-pressure geotextile bags leaning against the front side of the wharf damage section;
2) a row of sand wells parallel to the front edge of the wharf are arranged on the outer side of the back-pressure earth bag pile, and drainage consolidation is carried out on the damaged foundation;
3) after the foundation settlement is stabilized, dismantling the back-pressure geotextile bag stacks along the length direction of the wharf in a segmented manner, and synchronously driving a row of filling piles I in a segmented manner, wherein the filling piles I penetrate through the bottom of the front edge of the wharf damage section, and the bottom of the filling pile I is driven into a foundation bearing layer; driving a row of cast-in-place piles II close to the front edge of the wharf on two sides of the wharf damage section;
4) after the cast-in-place pile I and the cast-in-place pile II reach the design strength, slurry lifting is carried out on the foundation bed of the wharf damage section;
5) after the foundation bed after slurry rising reaches the design strength, carrying out back pressure on the foundation on the front side of the wharf damage section, and forming a permanent back pressure structure;
6) the front side breast wall of the dock destruction section is leveled through the outside embedded steel bars, and the bottom of the breast wall leveling structure is supported on the cast-in-place pile I;
7) the wharf surface of the damaged section of the wharf is repaired and leveled, so that the wharf surface is neat and reaches the original design elevation.
2. The method for repairing and reinforcing the block wharf after foundation damage according to claim 1, wherein the step 1), the back pressure geotextile bag is a sand bag; the top stacking width is not less than the height of the wharf surface from the mud surface of the foundation, the stacking height is not less than 2/3 of the height of the wharf surface from the mud surface of the foundation, and the stacking is formed by stacking in sections along the length direction of the wharf.
3. The method for repairing and reinforcing the block wharf after foundation failure according to claim 1, wherein the sand well in the step 2) has a diameter of 0.8-1.2 m and is spaced at the same length as the block wharf.
4. The method for repairing and reinforcing the block wharf after foundation damage in the step 3), wherein the cast-in-place piles I and the cast-in-place piles II are both cast by C40 concrete, and have the same size, the same spacing, the same pile top elevation and the same diameter of 0.8-1.2 m, the pile top elevation is flush with the limit low water level, and the spacing is 2-10 times of the diameter of the cast-in-place pile I.
5. The method for repairing and reinforcing the block wharf after foundation damage according to claim 1, wherein in the step 5), the permanent back pressure structure is formed by throwing and filling 10-100 kg of block stones, the block stones are cemented together by a mortar lifting material, the width of the top surface is not less than the height of the wharf surface from the mud surface of the foundation, and slope releasing treatment is performed on the outer side of the wharf.
6. The method for repairing and reinforcing the block wharf after foundation damage according to claim 1, wherein in the step 6), horizontal bars are planted on the front side of the wharf damage section, a steel mesh piece perpendicular to the horizontal bars is fixed on the horizontal bars, the bottom of the steel mesh piece extends to an extremely low water level, and C40 concrete is poured on the horizontal bars and the steel mesh piece for repairing and leveling.
7. The method for repairing and reinforcing the block wharf after foundation damage according to claim 1, wherein in the step 7), the wharf surface layer of the damaged section of the wharf is leveled by using C40 concrete.
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| CN202010627645.3A CN111663493A (en) | 2020-07-01 | 2020-07-01 | Repairing and reinforcing method suitable for block wharf after foundation damage |
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| CN202010627645.3A CN111663493A (en) | 2020-07-01 | 2020-07-01 | Repairing and reinforcing method suitable for block wharf after foundation damage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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