CN111851409A - Dam slope surface repairing structure and construction method - Google Patents
Dam slope surface repairing structure and construction method Download PDFInfo
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- CN111851409A CN111851409A CN202010752894.5A CN202010752894A CN111851409A CN 111851409 A CN111851409 A CN 111851409A CN 202010752894 A CN202010752894 A CN 202010752894A CN 111851409 A CN111851409 A CN 111851409A
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- pipe
- grouting
- slope
- plate
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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
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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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
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/128—Coherent linings made on the spot, e.g. cast in situ, extruded on the spot
Abstract
The invention provides a dam slope restoration structure and a construction method, wherein a top support pipe and a slope grid beam are arranged at the top of a loose soil body, and a bottom support pipe and a slope bottom grid beam are arranged at the bottom of the loose soil body; an interface reinforcing pipe and an interface grouting body are arranged on an interface between the loose soil body and the side slope soil body; a closed pressing plate is adopted to limit a filling area of the supplementary filling body, and the compactness of the supplementary filling body is improved by means of a surface vibrator synchronously; a sealing layer grouting pipe is arranged on the lower surface of the sealing pressing plate, and an interface water-resisting layer can be formed through grouting; a template supporting beam is arranged between the supporting upright post and the supporting cross beam, and a template position control bolt is arranged between the template supporting beam and the closed template; the middle part of the closed template is provided with a concrete filling pipe, the bottom end of the closed template is provided with a slab bottom exhaust pipe, and the top end of the closed template is provided with a filling observation pipe. The invention can improve the integrity of the dam slope restoration structure and reduce the difficulty of site construction.
Description
Technical Field
The invention relates to dam restoration engineering in hydraulic engineering, in particular to a dam slope restoration structure and a construction method, which can improve the field construction efficiency, enhance the structural integrity of a flood control dam slope protection structure and reduce the field construction difficulty.
Background
The dam is used as a water retaining structure, and the integrity of the slope surface structure of the dam has obvious influence on the anti-permeability performance and stability of the dam. At present, the dam slope surface restoration technology in the engineering community is mainly used for surface integrity restoration, and the construction quality of the dam slope surface restoration technology is always uncertain to a certain extent.
The brick core concrete stone for ecological restoration of the water bank dam suitable for the sandy river bed in the prior art comprises a core brick, core brick holes, a core brick body, reinforcing connecting reinforcing steel bars and a concrete shell, wherein the reinforcing connecting reinforcing steel bars of the brick core concrete stone are arranged according to the size of the brick core concrete stone, the minimum size of the reinforcing connecting reinforcing steel bars is 2, the reinforcing connecting reinforcing steel bars are only arranged in the core brick holes in the center, the maximum size of the reinforcing connecting reinforcing steel bars is 6, the reinforcing connecting reinforcing steel bars are respectively positioned in the core brick holes in the middle of the core brick and at four corners, the concrete shell is a shell, the thickness of the concrete shell is 15 cm, the technology can solve the problem of fast restoration of the slope surface of the dam, but is difficult to synchronously promote the stability of the soil body of the loose dam, and is difficult to synchronously solve the problems of improving the stress performance and integrally.
In view of this, in order to improve the quality and efficiency of repairing construction of the dam slope protection, the present invention provides a dam slope repairing structure and a construction method capable of improving the integrity of the dam slope protection structure, improving the overall construction quality and efficiency, and protecting the construction environment.
Disclosure of Invention
The invention aims to provide a dam slope surface repairing structure and a construction method, which can improve the field construction efficiency, enhance the structural integrity of a flood bank protection slope and reduce the field construction difficulty.
In order to achieve the purpose, the invention adopts the following technical scheme:
a construction method of a dam slope restoration structure comprises the following steps: 1) construction preparation; 2) constructing a slope grid beam and a slope bottom grid beam; 3) constructing interface grouting body; 4) constructing a segment grouting body; 5) filling a filling body; 6) constructing an interface water-resisting layer; 7) and (5) concrete pouring of the panel.
In addition, the scheme provides a dykes and dams domatic restoration structure, restores dykes and dams domatic, and the construction method construction of dykes and dams domatic restoration structure according to this scheme is obtained.
Compared with the prior art, the technical scheme has the following characteristics and beneficial effects:
(1) the top support pipe and the slope grid beam are arranged at the top of the loose soil body, and the bottom support pipe and the slope grid beam are arranged at the bottom of the loose soil body, so that the effect of sharing soil pressure can be achieved; an interface reinforcing pipe and an interface grouting body are arranged at the interface of the loose soil body and the side slope soil body, so that the shearing strength of the interface can be effectively improved.
(2) The invention adopts the closed pressing plate to limit the filling area of the supplementary filling body, can improve the compactness of the supplementary filling body by synchronously using the surface vibrator, and improves the filling construction efficiency of the supplementary filling body.
(3) According to the invention, the sealing layer grouting pipe is arranged on the lower surface of the sealing pressing plate, the interface water-stop layer can be formed through grouting, the sealing layer can be formed on the surface of the supplementary filling body, and the surface integrity of the supplementary filling body is enhanced.
(4) According to the invention, the template supporting beam is arranged between the supporting upright post and the supporting cross beam, and the template position control bolt is arranged between the template supporting beam and the closed template, so that the accuracy of the supporting and positioning of the closed template can be improved; set up concrete filling pipe in the middle part of sealing the template, the bottom sets up board bottom blast pipe, and the top sets up fills the observation pipe, can promote the closely knit degree of panel concrete.
Drawings
FIG. 1 is a flow chart of the construction process for repairing the slope of a dam according to the present invention;
FIG. 2 is a schematic view of the construction of the supplement filling body of FIG. 1;
FIG. 3 is a schematic structural view of the top stay tube and the bottom stay tube of FIG. 2;
FIG. 4 is a schematic view of the interface enhancement tube structure of FIG. 2;
FIG. 5 is a schematic view of the construction of the segment of the grouting pipe of FIG. 2;
FIG. 6 is a schematic view of the connection structure of the elastic expansion lug plate and the lug plate limiting ring in FIG. 4;
FIG. 7 is a schematic view of the construction of the interface water barrier of FIG. 1;
fig. 8 is a schematic view of a concrete pouring construction of the panel of fig. 1.
In the figure: 1-loosening soil body; 2-side slope soil body; 3-foundation soil mass; 4-toe box walls; 5-a gable bottom plate; 6-top bracing tube; 7-supporting the tube at the bottom; 8-grouting a carrier; 9-slope lattice beam; 10-beam side ear pier; 11-sloping bottom lattice beam; 12-an interface enhancing tube; 13-interfacial slip casting; 14-segment grouting pipe; 15-elastic expansion ear plate; 16-segment grouting holes; 17-a limit ring pull rope; 18-ear plate stop collar; 19-old slope surface guard plate; 20-segmental companding; 21-supporting the upright column; 22-column top plate; 23-a support beam; 24-supporting a transverse plate; 25-a position-controlled boom; 26-position control compression beams; 27-boom swivel hinge; 28-sealing the pressing plate; 29-filling the material box; 30-filling the connecting pipe; 31-a supplemental infill; 32-surface vibrator; 33-slurry pressure injection device; 34-grouting connecting pipes; 35-interfacial water barrier; 36-formwork bracing; 37-closing the template; 38-template position control bolt; 39-concrete pouring pipe; 40-panel concrete; 41-plate bottom exhaust pipe; 42-perfusion scope; 43-hydraulic outlet; 44-supporting tube closing plate; 45-interface grouting holes; 46-reinforced tube closing plate; 47-segment pipe closing plate; 48-sealing layer grouting pipe; 49-obturator foramen; 50-bin shift wheels; 51-arranging holes for supporting pipes; 52-pressure device shift wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and therefore the above-described terms should not be construed as limiting the present invention.
Technical requirements of field steel rolling and welding construction, technical requirements of bolt fastening construction, technical requirements of bag sewing construction and the like are not repeated in the embodiment, and the embodiment of the method related to the invention is mainly explained.
Fig. 1 is a flow chart of dam slope restoration construction according to the present invention, and referring to fig. 1, the dam slope restoration construction includes the following construction steps:
1) construction preparation: determining an interface between a loose soil body (1) and a side slope soil body (2) through field survey, testing the compactness and the bearing capacity of the side slope soil body (2) and a foundation soil body (3), and testing the appearance shapes of a toe box tooth wall (4) and a tooth wall bottom plate (5); preparing materials and devices required by construction;
wherein the side slope soil body (2) is arranged on the upper surface of the foundation soil body (3), the tooth wall bottom plate (5) is embedded in the foundation soil body (3), the slope toe tooth wall (4) is arranged close to the toe of the side slope soil body (2), the slope toe tooth wall (4) is arranged on the tooth wall bottom plate (5) to form the slope surface of the dam, and in addition, the upper surface of the side slope soil body (2) is provided with the loose soil body (1).
2) Constructing the slope grid beam and the slope bottom grid beam: drilling bracing tube laying holes (51) for laying a top bracing tube (6) and a bottom bracing tube (7) at the top and the bottom of the loose soil body (1) respectively, wherein the top of the loose soil body (1) is the side of the loose soil body (1) far away from the toe box tooth wall (4), and correspondingly, the bottom of the loose soil body (1) is the side close to the toe box tooth wall (4); the top bracing tube (6) and the bottom bracing tube (7) are respectively inserted into the bracing tube arrangement holes (51), then the top bracing tube (6) and the bottom bracing tube (7) are communicated with external filling equipment, and the pressure injection construction of the grouting bearing body (8) is carried out, wherein the top bracing tube (6) and the bottom bracing tube (7) are grouted by the external filling equipment, and slurry flows out from the side wall and is cured in the bracing tube arrangement holes (51) to form the grouting bearing body (8); arranging a template on an old slope surface guard plate (19) at the upper part of a top supporting pipe (6), pouring concrete to form a slope surface lattice beam (9), wherein the old slope surface guard plate (19) is arranged on a side slope soil body (2) and is arranged at the upper part of the top supporting pipe (6), the top side of the top supporting pipe (6) is inserted into the slope surface lattice beam (9), the upper surface of the slope surface lattice beam (9) is connected with the old slope surface guard plate (19), and a beam side ear pier (10) is arranged on the upper surface of the slope surface lattice beam (9); arranging slope bottom lattice beams (11) in gaps between the bottom supporting tubes (7) and the slope toe tooth walls (4), wherein grooves are longitudinally formed along the slope of the side slope soil body (2), and concrete is poured in the grooves to form the slope lattice beams (11);
3) construction of interface grouting body: inserting an interface reinforcing pipe (12) into the hole after the hole is led from the upper surface of the loose soil body (1) to the side slope soil body (2), and inserting the bottom end of the interface reinforcing pipe (12) to be 30-50 cm below the interface of the loose soil body (1) and the side slope soil body (2); then grouting to the interface of the loose soil body (1) and the side slope soil body (2) through an interface reinforcing pipe (12) to form an interface grouting body (13);
4) segment grouting construction: inserting a segment grouting pipe (14) into a hole after the upper surface of a self-loosening soil body (1) leads the hole to a side slope soil body (2), enabling a spring expansion lug plate (15) and a segment grouting hole (16) at the side of the segment grouting pipe (14) to be located in the side slope soil body (2), enabling a reserved section at the top of the segment grouting pipe (14) to extend to a position 20-30 cm above the slope concrete elevation of a connection position, binding the connected spring expansion lug plate (15) by a limiting ring pull rope (17), firstly removing the constraint of the limiting ring pull rope (17) on a lug plate limiting ring (18) and the spring expansion lug plate (15), enabling the spring expansion lug plate (15) to penetrate into the side slope soil body (2) under the self-elastic force action, then internally pressing and injecting grout into an interface reinforcing pipe (12) through external injection equipment, and forming a segment grouting body (20) around the pipe near the segment grouting hole (16);
5) filling a supplementary filling body: arranging a support upright post (21) on the tooth wall bottom plate (5), and enabling an upright post top plate (22) at the top end of the support upright post (21) to be the same as the top surface elevation of the beam side ear pier (10), wherein the upright post top plate (22) is transversely paved at the top end of the support upright post (21); firstly, placing a supporting cross beam (23) on a stand column top plate (22) and a beam side ear pier (10), wherein the supporting cross beam (23) is tiled on the stand column top plate (22) and the beam side ear pier (10), and then laying a supporting transverse plate (24) on the top surface of the adjacent supporting cross beam (23); the top end of a position control suspender (25) penetrates through a supporting transverse plate (24) and then is fastened with the supporting transverse plate (24) through a bolt, the bottom end of the position control suspender (25) is connected with a position control pressing beam (26) through a suspender rotating hinge (27), the position control pressing beam (26) is connected with a closed pressing plate (28), and a gap is reserved between the closed pressing plate (28) and a loose soil body (1); the top end of the segment grouting pipe (14) penetrates through the reserved holes in the closed pressing plate (28) and the position control pressing beam (26), and the segment grouting pipe (14) and the position control pressing beam (26) are firmly connected through bolts; placing a filling box (29) on a supporting transverse plate (24), arranging a filling connecting pipe (30) which can be inserted to the lower surface of a closed pressing plate (28) on the lower surface of the filling box (29), performing filling construction of a supplementary filling body (31) through the filling connecting pipe (30), and controlling the compactness of the supplementary filling body (31) by adopting a surface vibrator (32);
6) construction of an interface water barrier layer: placing a slurry pressure injection device (33) on the upper surface of a supporting transverse plate (24), arranging a pressure device shifting wheel (52) at the joint of the supporting transverse plate (24), enabling a grouting connecting pipe (34) on the slurry pressure injection device (33) to penetrate through the supporting transverse plate (24) and then be communicated with a sealing layer grouting pipe (48) on the lower surface of a sealing pressing plate (28), and pressing the sealing layer grouting pipe (48) to form an interface water-stop layer (35);
7) concrete pouring of the panel: removing the restraint of the position control hanger rods (25) on the position control press beams (26) and the closed press plates (28), and cutting off the pipe sections of the segment grouting pipes (14) extending out of the interface water-resisting layer (35); a template supporting beam (36) is arranged between the supporting cross beam (23) and the supporting upright post (21), and the template supporting beam (36) is connected with a closed template (37) through a template position control bolt (38); and (3) communicating the concrete pouring pipe (39) on the closed template (37) with an external concrete pouring device to carry out panel concrete (40) pouring construction, adopting a pipe plug to close the panel bottom exhaust pipe (41) when the concrete overflows from the top of the panel bottom exhaust pipe (41), and stopping the concrete pouring construction when the concrete overflows from the top of the pouring observation pipe (42).
In the step 2), the top bracing tube (6) and the bottom bracing tube (7) are rolled by steel tubes, the side walls of the top bracing tube and the bottom bracing tube are provided with slurry hydraulic outlet holes (43), the bottom end of the top bracing tube is provided with a bracing tube closing plate (44), the two side walls and the bracing tube closing plate (44) form the top bracing tube (6) and the bottom bracing tube (7) which are in a concave structure, and the slurry outlet holes (43) are uniformly spaced; the bonding material of the grouting bearing body (8) adopts cement mortar or grouting material, the cement mortar or grouting material is injected into the top bracing tube (6) and the bottom bracing tube (7) through external grouting equipment in a pressing mode, the bonding material flows out of the grout pressure outlet hole (43) and is formed by solidifying the side slope soil body (2) at the periphery of the top bracing tube (6) and the bottom bracing tube (7).
In the step 3), the interface reinforcing pipe (12) is formed by rolling a steel pipe, interface grouting holes (45) are formed in the side wall of the interface reinforcing pipe, specifically, the interface grouting holes (45) are formed in the range of 10-20 cm on each of the two sides of the interface of the loose soil body (1) and the side slope soil body (2), reinforcing pipe sealing plates (46) are arranged at the bottom ends of the interface reinforcing pipe, and the two side walls and the reinforcing pipe sealing plates (46) form the interface reinforcing pipe (12) with a concave structure; the bonding material of the interface grouting body (13) adopts cement mortar or grouting material, the cement mortar or grouting material is injected into the interface reinforcing pipe (12) through external grouting equipment, the bonding material flows out from the grout extrusion hole (43) and is formed by solidifying loose soil body (1) and side slope soil body (2) at the periphery of the interface reinforcing pipe (12).
In the step 4), the segment grouting pipes (14) are formed by rolling steel pipes, 2-4 rows of segment grouting holes (16) are formed in the side walls of the segment grouting pipes, elastic expansion lug plates (15) are arranged at positions close to the segment grouting holes (16), segment pipe sealing plates (47) are arranged at the bottom ends of the segment grouting pipes (14), and the two side walls and the segment pipe sealing plates (47) form the segment grouting pipes (14) with concave structures.
The elasticity expands otic placode (15) and adopts the rolling of elastic steel sheet to form, with the lateral wall welded connection of festival section mud jacking pipe (14), the outside cover that the elasticity expands otic placode (15) establishes otic placode spacing ring (18), and make otic placode spacing ring (18) and spacing ring stay cord (17) ligature connection, control the situation of being connected of otic placode spacing ring (18) and elasticity expansion otic placode (15) through spacing ring stay cord (17), wherein the elasticity expands otic placode (15) and inclines in the lateral wall setting of festival section mud jacking pipe (14), otic placode spacing ring (18) and elasticity expand otic placode (15) make festival section mud jacking hole (16) arrange in its triangle-shaped space that forms.
And step 5), the position control suspender (25) is formed by rolling a steel pipe or a screw rod, the top end of the position control suspender is provided with a connecting thread, the bottom end of the position control suspender is welded with a suspender rotating hinge (27), the suspender rotating hinge (27) is connected with a position control pressing beam (26), the position control pressing beam (26) is arranged on the upper surface of the closed pressing plate (28), and the suspender rotating hinge (27) adopts a universal ball or a hinge.
The closed pressing plate (28) is formed by rolling a steel plate, and a closed layer grouting pipe (48) is arranged on the lower surface of the closed pressing plate. The sealing layer grouting pipe (48) is formed by rolling a steel pipe and is welded with the sealing pressing plate (28), sealing body seepage holes (49) are formed in the side wall of the sealing layer grouting pipe (48) facing to the side of the loose soil body (1), and the sealing body seepage holes (49) are uniformly spaced; the closed pressing plate (28) is formed by rolling a steel plate, a surface vibrator (32) is preset on the closed pressing plate, and the surface vibrator (32) is an attached vibrator and is connected with the closed pressing plate (28) in a welding mode or connected through a bolt.
The supporting cross beam (23) is provided with a hole for the penetration of the position control suspender (25) and the filling connecting pipe (30); the filling box (29) is formed by rolling a steel plate, and a box shifting wheel (50) is arranged at the joint of the filling box and the supporting transverse plate (24).
In the step 6), the interface water-resisting layer (35) adopts emulsified asphalt or concrete grouting material.
In the step 7), the template position control bolt (38) is formed by combining a screw rod and a nut, the fastening directions of the screw rods on the two sides of the nut are opposite, and the screw rods are connected with the template support beam (36) and the closed template (37) in a welding mode. The concrete pouring pipe (39) is arranged in the middle of the closed formwork (37), the bottom end of the closed formwork (37) is provided with the slab bottom exhaust pipe (41), the top end of the closed formwork (37) is provided with the pouring observation pipe (42), the height of the top of the slab bottom exhaust pipe (41) is 3-5 cm higher than that of the bottom of the panel concrete (40), and the height of the top of the pouring observation pipe (42) is 5-10 cm higher than that of the top of the panel concrete (40).
Referring to fig. 2 to 7, the structure for repairing a slope protection of a dam: the top of the loose soil body (1) is provided with a top support pipe (6) and a slope grid beam (9), and the bottom is provided with a bottom support pipe (7) and a slope bottom grid beam (11); arranging an interface reinforcing pipe (12) and an interface grouting body (13) on the interface of the loosening soil body (1) and the side slope soil body (2); a closed pressing plate (28) is adopted to limit a filling area of the supplementary filling body (31), and the compactness of the supplementary filling body (31) is synchronously improved by means of a surface vibrator (32); a sealing layer grouting pipe (48) is arranged on the lower surface of the sealing pressing plate (28), and an interface water-resisting layer (35) can be formed through grouting; a template supporting beam (36) is arranged between the supporting upright post (21) and the supporting cross beam (23), and a template position control bolt (38) is arranged between the template supporting beam (36) and the closed template (37); a concrete pouring pipe (39) is arranged in the middle of the closed template (37), a slab bottom exhaust pipe (41) is arranged at the bottom end of the closed template, and a pouring observation pipe (42) is arranged at the top end of the closed template.
The loose soil body (1) and the side slope soil body (2) are low plastic limit cohesive soil.
The foundation soil body (3) is hard plastic state clay.
The toe box tooth wall (4) and the tooth wall bottom plate (5) are made of reinforced concrete materials, the concrete strength grade is C30, and the height of the toe box tooth wall is 1.5 m; and (3) pouring concrete with the thickness of 20cm and the width of 1m on the bottom plate of the tooth wall.
The top bracing tube (6) and the bottom bracing tube (7) are both made of steel tubes with the diameter of 100mm, and the side walls of the top bracing tube and the bottom bracing tube are uniformly provided with slurry hydraulic outlets (43) at intervals; the aperture of the pulp hydraulic outlet holes (43) is 10mm, and the vertical distance is 10 cm; the bottom ends of the top support tube (6) and the bottom support tube (7) are respectively provided with a support tube sealing plate (44), and the support tube sealing plate (44) is formed by rolling a steel plate with the thickness of 2mm and is connected with the top support tube (6) and the bottom support tube (7) in a welding manner.
The bonding material of the grouting bearing body (8) is cement mortar, the strength grade is M20, the top bracing tube (6) and the bottom bracing tube (7) are injected by internal pressure through external grouting equipment, the grouting pressure is 3MPa, and the slope soil body (2) is solidified around the top bracing tube (6) and the bottom bracing tube (7).
The slope surface grid beam (9) and the slope bottom grid beam (11) are made of reinforced concrete materials and are embedded into the side slope soil body (2), and the widths of the slope surface grid beam and the slope bottom grid beam are respectively 30cm and 20 cm.
The beam side ear piers (10) and the slope lattice beams (9) are integrally cast, the cross section of each beam side ear pier is in a right-angled triangle shape, and the height of each beam side ear pier is 10 cm.
The interface reinforcing pipe (12) is made of a steel pipe with the diameter of 60mm, interface grouting holes (45) are arranged in the range of 20cm on each of two sides of the interface of the loose soil body (1) and the slope soil body (2), and a reinforcing pipe sealing plate (46) is arranged at the bottom end of the interface reinforcing pipe. The aperture of the interface grouting holes (45) is 10mm, and the vertical distance is 10 cm; the reinforced tube closing plate (46) is formed by rolling a steel plate with the thickness of 2mm and is connected with the interface reinforced tube (12) in a welding mode.
The bonding material of the interface grouting body (13) adopts cement mortar, the strength grade is M20, the interface reinforcing pipe (12) is injected by pressure through external pouring equipment, and the loose soil body (1) and the side slope soil body (2) are solidified around the interface reinforcing pipe (12).
The segment grouting pipe (14) is made of a steel pipe with the diameter of 100mm, 3 rows of segment grouting holes (16) are formed in the side wall of the segment grouting pipe, an elastic expansion lug plate (15) is arranged at the segment grouting hole (16), and a segment pipe sealing plate (47) is arranged at the bottom end of the segment grouting pipe; the elastic expansion lug plate (15) is formed by rolling an elastic steel sheet with the thickness of 2mm and is connected with the outer side wall of the segment grouting pipe (14) in a welding mode, an ear plate limiting ring (18) is sleeved outside the elastic expansion lug plate (15), the ear plate limiting ring (18) is connected with a limiting ring pull rope (17) in a binding mode, and the connection condition of the ear plate limiting ring (18) and the elastic expansion lug plate (15) is controlled through the limiting ring pull rope (17). Wherein the aperture of the segment grouting hole (16) is 20 mm; the segment pipe sealing plate (47) is formed by rolling a steel plate with the thickness of 2 mm; the ear plate limiting ring (18) is formed by rolling smooth steel bars with the diameter of 6 mm; the limiting ring pull rope (17) is a steel wire rope with the diameter of 10 mm.
The old slope surface guard plate (19) is a concrete panel with the thickness of 10cm, and the strength grade of the concrete is C30.
The bonding material of the segment companding body (20) adopts cement mortar with the strength grade of M20, and the segment companding body is formed by grouting the outside of the segment grouting hole (16) of the segment grouting pipe (14) through external grouting equipment.
The support column (21) is made of a steel pipe with the strength grade of Q345D and the specification of phi 200 multiplied by 10.
The upright post top plate (22) is formed by rolling a steel plate with the thickness of 10mm, and the length and the width of the upright post top plate are both 30 cm.
The supporting beam (23) adopts H-shaped steel with the specification of 200 multiplied by 8 multiplied by 12.
The position control suspender (25) is formed by rolling a steel pipe with the diameter of 60mm, the top end is provided with a connecting thread, the bottom end is welded with a suspender rotating hinge (27), and the suspender rotating hinge (27) is a ball hinge with the ball head diameter of 3 cm.
The position control pressing beam (26) is formed by rolling a steel plate with the thickness of 10mm, the width of the position control pressing beam is 30cm, and a hole for the segment grouting pipe (14) to penetrate through is formed in the position control pressing beam.
The closed pressing plate (28) is formed by rolling a steel plate with the thickness of 3mm, a surface vibrator (32) is preset on the closed pressing plate, the surface vibrator (32) is an attached vibrator and is connected with the closed pressing plate (28) in a welding mode, a hole for the penetration of the position control hanger rod (25) and the filling connecting pipe (30) is formed in the surface vibrator, and the filling connecting pipe (30) is a rubber hose with the inner diameter of 60 mm; the middle part of the template is provided with a concrete pouring pipe (39), the bottom end of the template is provided with a plate bottom exhaust pipe (41), the top end of the template is provided with a pouring observation pipe (42), the height of the top of the pipe of the plate bottom exhaust pipe (41) is 3cm higher than the height of the concrete bottom of the panel, and the height of the top of the pipe of the pouring observation pipe (42) is 6cm higher than the height of the top of the concrete top of the panel (40).
The concrete pouring pipe (39) and the pouring observation pipe (42) are respectively a steel pipe with the diameter of 100mm and a steel pipe with the diameter of 60 mm.
The panel concrete (40) is concrete with the strength grade of C30.
The plate bottom exhaust pipe (41) adopts a PVC pipe with the diameter of 30 mm.
The filling box (29) is formed by rolling a steel plate with the thickness of 2mm, and a box shifting wheel (50) is arranged at the joint of the filling box and the supporting transverse plate (24). Wherein, the supporting transverse plate (24) is formed by rolling a steel plate with the thickness of 2mm, and the material box shifting wheel (50) adopts a stainless steel roller.
The supplementary filling body (31) adopts self-compacting concrete with the strength grade of C30.
The grout pressure injection device (33) adopts a grouting concrete pressure injection device.
The grouting connecting pipe (34) adopts a steel pipe with the diameter of 60 mm.
The interface water-resisting layer (35) adopts concrete grouting material with the strength grade of C35.
The template position control bolt (38) is composed of a high-strength screw rod with the diameter of 60mm and a bolt, the fastening directions of the screw rods on the two sides of the nut are opposite, and the screw rods are connected with the template support beam (36) and the closed template (37) in a welding mode. The template support beam (36) is H-shaped steel with the specification of 200 multiplied by 8 multiplied by 12, and the closed template (37) is rolled by a steel plate with the thickness of 3 mm.
The sealing layer grouting pipe (48) is made of a steel pipe with the diameter of 60mm, is welded with the sealing pressing plate (28), sealing body seepage holes (49) are uniformly arranged on the side wall facing the loose soil body (1) at intervals, and the sealing body seepage holes (49) are circular or oval.
The bracing tube laying hole (51) is circular and has a diameter of 120 mm.
The pressure device displacement wheel (52) adopts a 6-inch universal caster wheel and can longitudinally move parallel to the wedge wall (4).
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone with the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (10)
1. A construction method of a dam slope restoration structure is characterized by comprising the following steps:
1) construction preparation: determining an interface between a loose soil body (1) and a side slope soil body (2) through field survey, testing the compactness and the bearing capacity of the side slope soil body (2) and a foundation soil body (3), and testing the appearance shapes of a toe box tooth wall (4) and a tooth wall bottom plate (5); preparing materials and devices required by construction;
2) constructing the slope grid beam and the slope bottom grid beam: drilling support pipe laying holes (51) at the top and the bottom of a loose soil body (1) respectively, inserting a top support pipe (6) and a bottom support pipe (7) into the support pipe laying holes (51) at the top and the bottom respectively, then communicating the top support pipe (6) and the bottom support pipe (7) with external pouring equipment, performing pressure pouring construction of a grouting bearing body (8), arranging a template on an old slope surface guard plate (19) at the upper part of the top support pipe (6), pouring concrete to form a slope surface lattice beam (9), arranging beam side lug piers (10) on the upper surface of the slope surface lattice beam (9), and arranging a slope bottom lattice beam (11) in a gap between the bottom support pipe (7) and a slope toe tooth wall (4);
3) construction of interface grouting body: inserting an interface reinforcing pipe (12) into the hole after the upper surface of the self-loosening soil body (1) leads the hole to the side slope soil body (2), inserting the bottom end of the interface reinforcing pipe (12) below the interface of the self-loosening soil body (1) and the side slope soil body (2), and pressing slurry to the interface of the self-loosening soil body (1) and the side slope soil body (2) through the interface reinforcing pipe (12) to form interface grouting body (13);
4) segment grouting construction: inserting a segment grouting pipe (14) into a hole after the upper surface of a self-loosening soil body (1) leads the hole to a side slope soil body (2), enabling an elastic expanding lug plate (15) and a segment grouting hole (16) at the side of the segment grouting pipe (14) to be positioned in the side slope soil body (2), enabling a reserved section at the top of the segment grouting pipe (14) to extend to a position above the slope concrete elevation of a connection position, releasing the restraint of a limiting ring pull rope (17) bound on the elastic lug plate (15) on a lug plate limiting ring (18) and the elastic expanding lug plate (15), enabling the elastic expanding lug plate (15) to penetrate into the side slope soil body (2) under the action of self elasticity, and then internally pressing and injecting grout into an interface reinforcing pipe (12) through external injection equipment to form a segment expanding body (20) around the pipe near the segment grouting hole (16);
5) filling a supplementary filling body: arranging a support upright post (21) on the tooth wall bottom plate (5), enabling an upright post top plate (22) at the top end of the support upright post (21) to be the same as the top surface elevation of the beam side ear pier (10), arranging support cross beams (23) on the upright post top plate (22) and the beam side ear pier (10), and paving a support transverse plate (24) on the top surfaces of the adjacent support cross beams (23); the top end of a position control suspender (25) penetrates through a supporting transverse plate (24), the bottom end of the position control suspender (25) is connected with a position control pressing beam (26) through a suspender rotating hinge (27), the position control pressing beam (26) is connected with a closed pressing plate (28), the top end of a segment grouting pipe (14) penetrates through reserved holes in the closed pressing plate (28) and the position control pressing beam (26) and is firmly connected, a filling box (29) is arranged on the supporting transverse plate (24), a filling connecting pipe (30) inserted into the lower surface of the closed pressing plate (28) is arranged on the lower surface of the filling box (29), filling construction of a supplementary filling body (31) is carried out through the filling connecting pipe (30), and a surface vibrator (32) is adopted to control the compactness of the supplementary filling body (31);
6) construction of an interface water barrier layer: placing a slurry pressure injection device (33) on the upper surface of the supporting transverse plate (24), enabling a grouting connecting pipe (34) on the slurry pressure injection device (33) to penetrate through the supporting transverse plate (24) and then be communicated with a sealing layer grouting pipe (48) on the lower surface of the sealing pressing plate (28), and grouting the sealing layer grouting pipe (48) to form an interface water barrier layer (35);
7) concrete pouring of the panel: the restraint of the position control hanger rods (25) on the position control press beams (26) and the closed press plates (28) is removed, the pipe sections of the segment grouting pipes (14) extending out of the interface water barrier layer (35) are cut off, the template support beams (36) are arranged between the support cross beams (23) and the support upright posts (21), and the template support beams (36) are connected with the closed templates (37) through template position control bolts (38); the concrete pouring pipe (39) on the closed template (37) is communicated with an external concrete pouring device to carry out pouring construction of panel concrete (40), when the concrete overflows from the top of the plate bottom exhaust pipe (41), the plate bottom exhaust pipe (41) is closed by adopting a pipe plug, and when the concrete overflows from the top of the pouring observation pipe (42), the concrete pouring construction is stopped.
2. The construction method of a dam slope restoration structure according to claim 1, wherein in step 2), the side walls of the top brace pipe (6) and the bottom brace pipe (7) are provided with a grout hydraulic outlet (43), the bottom end of the top brace pipe is provided with a brace pipe closing plate (44), and the bonding material of the grouting bearing body (8) is cement mortar or grouting material.
3. The construction method of a dam slope restoration structure according to claim 1, wherein in step 3), the interface grouting holes (45) are formed in the two side walls of the interface reinforced pipe (12), the interface grouting holes (45) are formed in the two sides of the interface between the loose soil body (1) and the side slope soil body (2), the reinforced pipe sealing plate (46) is arranged at the bottom end, and the bonding material of the interface grouting body (13) is cement mortar or grouting material.
4. The construction method of an embankment slope restoration structure according to claim 1, wherein the segment grouting holes (16) are formed in the side walls of the segment grouting pipes (14), the elastic expansion ear plates (15) are provided at positions close to the segment grouting holes (16), and the segment pipe closing plates (47) are provided at the bottom ends of the segment grouting pipes (14).
5. The construction method of the dam slope restoration structure according to claim 4, wherein the elastically-expandable lug plate (15) is welded to the outer side wall of the segment grouting pipe (14), and a lug plate limiting ring (18) is sleeved on the outside of the elastically-expandable lug plate (15) and the lug plate limiting ring (18) is bound to a limiting ring pull rope (17).
6. The construction method of the dam slope restoration structure according to claim 1, wherein the top end of the position control boom (25) is provided with a connecting thread, the bottom end is welded with a boom rotation hinge (27), the boom rotation hinge (27) is connected with a position control pressure beam (26), the position control pressure beam (26) is arranged on the upper surface of the closed pressure plate (28), and the boom rotation hinge (27) adopts a universal ball or a hinge.
7. The construction method of an embankment slope restoration structure according to claim 1, wherein the supporting beam (23) is provided with holes for the penetration of the position control hanger rods (25) and the filling connection pipes (30); and a bin shifting wheel (50) is arranged at the joint of the filling bin (29) and the supporting transverse plate (24).
8. A method of constructing a dam slope restoration structure according to claim 1 wherein the interface water barrier (35) is emulsified asphalt or concrete grout.
9. The construction method of an embankment slope restoration structure according to claim 1, wherein a concrete pouring pipe (39) is provided in the middle of the closed formwork (37), a slab bottom exhaust pipe (41) is provided at the bottom end, and a pouring observation pipe (42) is provided at the top end.
10. A dam slope restoration structure for restoring a dam slope, which is constructed by the construction method according to any one of claims 1 to 9.
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