CN114657940B - Formwork supporting system for cement slab formwork cast-in-situ gravity type embankment retaining wall concrete and construction method - Google Patents
Formwork supporting system for cement slab formwork cast-in-situ gravity type embankment retaining wall concrete and construction method Download PDFInfo
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- CN114657940B CN114657940B CN202210490451.2A CN202210490451A CN114657940B CN 114657940 B CN114657940 B CN 114657940B CN 202210490451 A CN202210490451 A CN 202210490451A CN 114657940 B CN114657940 B CN 114657940B
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 238000009415 formwork Methods 0.000 title claims abstract description 43
- 230000005484 gravity Effects 0.000 title claims abstract description 28
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 28
- 239000004568 cement Substances 0.000 title claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 239000011120 plywood Substances 0.000 claims abstract description 18
- 239000004570 mortar (masonry) Substances 0.000 claims description 18
- 239000002023 wood Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 14
- 238000005266 casting Methods 0.000 abstract 2
- 238000003079 width control Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil 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
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Retaining Walls (AREA)
- Foundations (AREA)
Abstract
The invention discloses a formwork system and a construction method of a plywood formwork cast-in-situ gravity type embankment retaining wall concrete; the method is characterized in that: the plywood is used as a face template, and a concrete formwork system is constructed together with square timber, scaffold steel pipes, fasteners, butterfly buckles, inner pull rods and the like. In the concrete implementation, the scaffold steel pipes vertically placed on the wall surfaces are used as guiding and positioning steel pipes, the plywood width control templates are used for layered construction of the heights, except for the abrupt change of the section of the retaining wall and the casting of wall top concrete to the designed elevation, all the other layers of concrete are constructed to the position 10cm below the top surface of the templates. When the method is used for casting long and large concrete embankment retaining walls in situ, compared with a commonly used steel template formwork supporting system, the method has the advantages of low template cost and large investment at one time; the weight is light, and the assembly and the disassembly are convenient; good adaptability to the plane line shape of the retaining wall, smoother wall surface and the like.
Description
Technical Field
The invention relates to the field of construction of retaining walls of water conservancy embankment engineering, in particular to a formwork supporting system and a construction method of cement slab formwork cast-in-situ gravity type retaining wall concrete.
Background
The gravity type retaining wall is very popular in engineering construction, and the gravity type retaining wall balances soil body by means of self gravity, and has the engineering advantages of simple structure, convenience in construction and the like. When the gravity type retaining wall is used for water conservancy embankment engineering, the construction period is often tense due to factors such as longer construction area, large influence by flood season and the like, and the defects of large template input amount, requirement for lifting machinery for installation and the like exist when a common large-size plane steel template is used, so that the template amortization cost is high. In addition, when the plane steel template is used for constructing the curve segment embankment retaining wall, the template cannot adapt to the curve line shape of the retaining wall well due to high rigidity, and obvious fold lines are easily formed on the concrete wall surface, so that the attractiveness is affected. In order to solve the above problems, it is necessary to develop a formwork system which is easy to operate, can reduce the cost of the formwork and is suitable for the linear shape of the curved surface of the retaining wall with a flat curved section, and a construction method thereof.
Disclosure of Invention
Therefore, in order to solve the defects, the invention provides a formwork supporting system of the concrete of the slab mold cast-in-situ gravity type embankment retaining wall and a construction method; the method is suitable for cast-in-situ gravity type embankment retaining wall concrete.
The invention is realized in this way, provides a template system of the concrete of the cement slab template cast-in-situ gravity type embankment retaining wall, which is characterized in that: comprises a face template, a secondary edge, a main edge, an upper longitudinal beam, an upper cross beam, an inner pull rod and a butterfly buckle; wherein the face template adopts a plywood, and the back side of the face template is provided with a secondary ridge and a main ridge in sequence; one end of the inner pull rod is embedded into the concrete, and the other end of the inner pull rod is buckled and clamped on the main rib by a butterfly buckle; wherein, the top of the high-surface template is more than 10cm, an upper longitudinal beam is arranged on the back side of the secondary edge, and the upper longitudinal beam is connected with the steel pipe secondary edge by a rotary fastener; the upper longitudinal beams and the upper cross beams on two sides of the wall are fixedly connected through rotary fasteners.
The invention relates to a formwork system of a cementing plate formwork cast-in-situ gravity type embankment retaining wall concrete, which is characterized in that; the face template is made of plywood, and the height of the face template is controlled by the width of the plywood in a layered mode.
The invention relates to a formwork system of a cementing plate formwork cast-in-situ gravity type embankment retaining wall concrete, which is characterized in that; the secondary edge comprises two types of steel pipe secondary edges, square wood secondary edges and the like, wherein the steel pipe secondary edges adopt phi 48mm scaffold steel pipes with the length of 4-6 m, and are vertically placed along a concrete wall and serve as gradient guide positioning steel pipes; the square wood secondary edge adopts a 50mm multiplied by 100mm square, is parallel to the steel pipe secondary edge and is arranged at the vertical joint of the face template in the middle, and is fixedly connected with the face template by iron nails.
The invention relates to a formwork system of a cementing plate formwork cast-in-situ gravity type embankment retaining wall concrete, which is characterized in that; the main beam, the upper longitudinal beam and the upper cross beam all adopt phi 48mm scaffold steel pipes, wherein the main beam adopts a double steel pipe structure with the diameter of 2 multiplied by phi 48mm, and the upper longitudinal beam and the upper cross beam all adopt single phi 48mm steel pipes.
The invention relates to a formwork system of a cementing plate formwork cast-in-situ gravity type embankment retaining wall concrete, which is characterized in that; the inner pull rod is made of steel bars with the diameter of 12mm to 14 mm.
A cement slab mold cast-in-situ gravity type embankment retaining wall concrete construction method is characterized in that; the process is carried out as follows;
The construction process flow is as follows;
Step 1, designing parameters of a formwork system:
(1) Dividing concrete construction layering, calculating a template lateral pressure according to the maximum layering height, designing the thickness of a face template, the specifications and the spacing of a secondary steel pipe edge, a main edge and an inner pull rod, and checking and calculating to be qualified to be used as a formwork supporting system design parameter;
(2) The upper longitudinal beams are arranged above the surface templates on two sides of the retaining wall, the upper longitudinal beams are connected through upper cross beams, and the upper cross beams are arranged at intervals of 3m and used for reinforcing and locking the upper side of the formwork supporting system.
Step 2, foundation concrete construction: the retaining wall foundation concrete is cast in situ by adopting plywood or steel template formwork erection, and inner pull rods are respectively embedded in the concrete on the top surface and the back side of the foundation during construction;
Step 3, constructing the first layer wall body concrete above the foundation:
(1) And (3) applying mortar strips: and (3) paying off after reserving the surface template and the steel pipe secondary edge positions on the top surface of the foundation concrete according to the wall surface line, and applying M7.5 mortar strips. The mortar strip has a rectangular section with the height of 80mm and the width of 150 mm;
(2) Installing a formwork system: the steel pipe secondary edge which is exposed from the top of the face template is connected with the upper longitudinal beam through a rotary fastener, and the upper longitudinal beams on two sides of the wall are connected with the upper cross beam through rotary fasteners;
(3) Pouring first-layer wall body concrete after installing the end template, and pre-burying an inner pull rod on the top surface of the concrete during construction;
Step4, middle layer wall concrete construction: after the poured layer concrete is hardened, performing the construction of the upper layer of concrete, when the height of the steel pipe secondary edge does not meet the formwork supporting requirement, firstly lifting the steel pipe secondary edge, and then disassembling the exposed face template and the square wood secondary edge below the steel pipe secondary edge for the subsequent construction of retaining wall concrete;
(1) Moving the upper longitudinal beam and the upper cross beam to the upper part of the layer template to be poured for reinstallation, and installing the template, the main rib, the inner pull rod and the butterfly buckle;
(2) Pouring the wall body concrete of the layer after installing the end template, and pre-burying an inner pull rod on the top surface of the concrete during construction;
step 5, wall concrete construction at the counter weight station: repeating the step4 until the construction of the wall concrete at the counter weight platform is completed;
step 6, constructing the first layer wall concrete above the counterweight table:
(1) And (3) applying mortar strips: and (3) paying off after reserving the positions of the surface template and the steel pipe secondary edge on the top surface of the counter weight platform according to the wall back line, and preparing M7.5 mortar to prepare a strip. The mortar strip has a rectangular section with the height of 80mm and the width of 150 mm;
(2) Installing a formwork system: the wall surface mounting face template, the main edge, the inner pull rod and the butterfly buckle are connected with the upper longitudinal beam through rotary fasteners, and the upper longitudinal beams on two sides of the wall body are connected with the upper cross beam through rotary fasteners;
(3) Pouring wall concrete after installing the end template, and pre-burying an inner pull rod on the top surface of the concrete during construction;
Step 7, constructing middle layer wall concrete above the counterweight table: repeating the step 4;
Step 8, construction of the top wall body concrete of the counter weight platform: repeating the step 4, and performing leveling treatment on the top surface of the concrete without pre-burying an inner pull rod during construction;
Step 9, wall surface treatment: the wall surface is cleaned along with the disassembly progress of the surface template, the inner pull rod exposing the wall body is cut off by a hand-held grinder, and the wall surface is decorated.
The invention has the advantages that: the invention provides a cement slab mold cast-in-situ gravity type embankment retaining wall concrete and a construction method by improving the cement slab mold cast-in-situ gravity type embankment retaining wall concrete; the method is suitable for cast-in-situ gravity type embankment retaining wall concrete; compared with the common steel template supporting system, the method has the following characteristics:
(1) The self-weight-saving retaining wall has the advantages of light self weight, convenience and rapidness in assembly and disassembly, no need of matching with hoisting equipment, accurate control of gradient of the retaining wall and the like.
(2) The template spreading cost is low, a large amount of investment can be realized at one time, and the template spreading method is more suitable for construction of long and large retaining walls.
(3) The template can form a curved surface, has good adaptability to the plane line shape of the retaining wall, has smooth wall surface, and is more suitable for constructing the curved section retaining wall.
(4) The construction layering height is not large, which is beneficial to the hydration heat dissipation of the large-volume concrete.
Drawings
FIG. 1 is a construction process flow chart of a method for constructing concrete of a cast-in-situ gravity type embankment retaining wall by using a plywood die;
FIG. 2 is a schematic illustration of an elevational arrangement of a face template, minor ridge, major ridge, butterfly tie, upper stringer, and upper cross beam;
FIG. 3 is a schematic view of the construction of the first layer wall concrete and the middle layer wall concrete above the foundation;
FIG. 4 is a large sample of FIG. 3A;
FIG. 5 is a schematic illustration of intermediate layer wall concrete and counter weight platform wall concrete construction;
FIG. 6 is a schematic view of the construction of the first layer of wall concrete above the counterweight table;
FIG. 7 is a schematic view of the construction of middle layer wall concrete and wall top concrete above the counterweight table;
fig. 8 is a cross-sectional view of the embankment wall after the concrete is completed.
Wherein: the face plate comprises a face plate body 1, secondary ribs 2, main ribs 3, upper longitudinal beams 4, upper cross beams 5, inner pull rods 6 and butterfly buckles 7.
Detailed Description
The following detailed description of the present invention will provide clear and complete description of the technical solutions of embodiments of the present invention, with reference to fig. 1-8, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive changes, are intended to fall within the scope of the invention.
The invention provides a cement slab mold cast-in-situ gravity type embankment retaining wall concrete and a construction method by improving the cement slab mold cast-in-situ gravity type embankment retaining wall concrete; as shown in fig. 2-7, can be implemented as follows; the formwork supporting system of the embankment retaining wall concrete comprises a face template 1, a secondary edge 2, a main edge 3, an upper longitudinal beam 4, an upper cross beam 5, an inner pull rod 6 and a butterfly buckle 7; wherein the face template 1 adopts a plywood, and the back side of the face template 1 is provided with a secondary rib 2 and a main rib 3 in sequence; one end of the inner pull rod 6 is buried in the concrete, and the other end is buckled and clamped on the main ridge 3 by the butterfly buckle 7; wherein, the top of the high-surface template 1 is more than 10cm, an upper longitudinal beam 4 is arranged on the back side of the secondary edge 2, and the upper longitudinal beam 4 is connected with the steel pipe secondary edge 201 by a rotary fastener; wherein, the upper longitudinal beams 4 and the upper cross beams 5 on the two sides of the wall body are connected and fixed by rotary fasteners.
The invention is implemented; as shown in fig. 2-7, the face template 1 is made of plywood, and the height of the face template 1 is built in layers according to the width of the plywood. The secondary edge 2 comprises two types of steel pipe secondary edges 201, square wood secondary edges 202 and the like, wherein the steel pipe secondary edges 201 adopt phi 48mm scaffold steel pipes with the length of 4-6 m, and are vertically placed along a concrete wall surface and serve as gradient guiding positioning steel pipes; the square wood secondary ridge 202 is formed by adopting a 50mm multiplied by 100mm square, the square wood secondary ridge 202 is parallel to the steel pipe secondary ridge 201 and is arranged at the vertical joint of the face template 1 in the middle, and the square wood secondary ridge 202 and the face template 1 are fixedly connected by iron nails. The main beam 3, the upper longitudinal beam 4 and the upper cross beam 5 all adopt phi 48mm scaffold steel pipes, wherein the main beam 3 adopts a double steel pipe structure with the diameter of 2 multiplied by phi 48mm, and the upper longitudinal beam 4 and the upper cross beam 5 all adopt single phi 48mm steel pipes. The inner pull rod 6 is made of steel bars with the diameter of 12mm to 14 mm.
The invention provides a concrete construction method of a cementing plate mould cast-in-situ gravity type embankment retaining wall by improving the construction method; the method is suitable for cast-in-situ gravity type embankment retaining wall concrete;
As shown in fig. 1, the method is implemented according to the following steps:
Step 1, designing parameters of a formwork system:
(1) Dividing concrete construction layering, calculating side pressure of the template according to the maximum layering height, designing the thickness of the template 1, the specifications and the spacing of the secondary steel pipe edge 201, the main edge 3 and the inner pull rod 6, and checking and calculating to be qualified to be used as a formwork supporting system design parameter.
(2) The upper longitudinal beams 4 are arranged above the surface templates on two sides of the retaining wall, the upper longitudinal beams 4 are connected through upper cross beams 5, and the upper cross beams 5 are arranged at intervals of 3m and used for reinforcing and locking the upper side of the formwork supporting system.
Step 2, foundation concrete construction: the retaining wall foundation concrete is cast in situ by adopting plywood or steel template formwork erection, and the inner pull rods 6 are respectively embedded in the concrete on the top surface and the back side of the foundation during construction.
Step3, as shown in fig. 3, constructing the first layer wall concrete above the foundation:
(1) And (3) applying mortar strips: and (3) reserving the positions of the surface template 1 and the steel pipe secondary edge 201 on the top surface of the foundation concrete according to the wall surface line, paying off, and applying M7.5 mortar strips. The mortar strip has a rectangular section with a height of 80mm and a width of 150 mm.
(2) Installing a formwork system: the steel pipe secondary ridge 201 which is exposed from the surface template 1 is connected with the upper longitudinal beam 4 by a rotary fastener, and the upper longitudinal beam 4 on two sides of the wall body is connected with the upper cross beam 5 by a rotary fastener.
(3) And pouring first-layer wall body concrete after installing the end template, and pre-burying an inner pull rod 6 on the top surface of the concrete during construction.
Step 4, as shown in fig. 3-4, constructing middle layer wall concrete: and after the poured layer concrete is hardened, performing the construction of the upper layer of concrete, if the height 201 of the steel pipe secondary ridge does not meet the formwork supporting requirement, firstly lifting the steel pipe secondary ridge 201, and then disassembling the exposed face template 1 and the square wood secondary ridge 202 below the steel pipe secondary ridge 201 for the subsequent construction of retaining wall concrete.
(1) And (3) moving the upper longitudinal beam 4 and the upper cross beam 5 to the upper side of the layer template to be poured for reinstallation, and installing the surface template 1, the main rib 3, the inner pull rod 6 and the butterfly buckle 7.
(2) And pouring the wall body concrete of the layer after installing the end template, and pre-burying an inner pull rod 6 on the top surface of the concrete during construction.
Step 5, as shown in fig. 5, wall concrete construction at the counter weight station: and (4) repeating the step 4 until the construction of the wall concrete at the counter weight platform is completed.
Step 6, as shown in fig. 6, constructing the first layer of wall concrete above the counterweight table:
(1) And (3) applying mortar strips: and (3) reserving the positions of the surface template 1 and the steel pipe secondary edge 201 on the top surface of the counter weight platform according to the back line of the wall, paying off, and preparing M7.5 mortar to prepare a strip. The mortar strip has a rectangular section with a height of 80mm and a width of 150 mm.
(2) Installing a formwork system: the wall face mounting face template 1, the main edge 3, the inner pull rod 6 and the butterfly buckle 7, the wall back mounting face template 1, the secondary edge 2, the main edge 3, the inner pull rod 6 and the butterfly buckle 7, the exposed steel pipe secondary edge 201 of the face template 1 is connected with the upper longitudinal beam 4 through rotary fasteners, and the upper longitudinal beams 4 on two sides of the wall body are connected with the upper cross beam 5 through rotary fasteners.
(3) And pouring wall concrete after installing the end template, and pre-burying an inner pull rod 6 on the top surface of the concrete during construction.
Step 7, constructing middle layer wall concrete above the counterweight table: and (4) repeating the step 4.
Step 8, as shown in fig. 7, the construction of the counter weight top wall body concrete: and 4, repeating the step, and no longer embedding the inner pull rod 6 and leveling the top surface of the concrete during construction.
Step 9, as shown in fig. 5-8, wall surface treatment: the wall surface is cleaned along with the disassembly progress of the surface template, the inner pull rod 6 exposing the wall body is cut off by a hand-held grinder, and the wall surface is decorated.
The invention has the following characteristics:
(1) The self-weight-saving retaining wall has the advantages of light self weight, convenience and rapidness in assembly and disassembly, no need of matching with hoisting equipment, accurate control of gradient of the retaining wall and the like.
(2) The template spreading cost is low, a large amount of investment can be realized at one time, and the template spreading method is more suitable for construction of long and large retaining walls.
(3) The template can form a curved surface, has good adaptability to the plane line shape of the retaining wall, has smooth wall surface, and is more suitable for constructing the curved section retaining wall.
(4) The construction layering height is not large, which is beneficial to the hydration heat dissipation of the large-volume concrete.
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.
Claims (3)
1. A construction method of a cement slab mold cast-in-situ gravity type embankment retaining wall concrete is characterized in that; the retaining wall concrete comprises a face template (1), a minor ridge (2), a main ridge (3), an upper longitudinal beam (4), an upper cross beam (5), an inner pull rod (6) and a butterfly buckle (7); wherein the face template (1) adopts a plywood, and the secondary edge (2) and the main edge (3) are sequentially arranged on the back side of the face template (1); one end of the inner pull rod (6) is buried in the concrete, and the other end is buckled and clamped on the main rib (3) by a butterfly buckle (7); wherein, the top of the high-surface template (1) is more than 10cm, an upper longitudinal beam (4) is arranged on the back side of the secondary edge (2), and the upper longitudinal beam (4) is connected with the steel pipe secondary edge (201) by a rotary fastener; wherein, the upper longitudinal beams (4) on the two sides of the wall body are fixedly connected with the upper cross beam (5) by a rotary fastener; the secondary edge (2) comprises a steel pipe secondary edge (201) and a square wood secondary edge (202), wherein the steel pipe secondary edge (201) adopts a phi 48mm scaffold steel pipe with the length of 4-6 m, and is vertically placed along a concrete wall and used as a gradient guiding positioning steel pipe; the square wood secondary edge (202) is formed by adopting 50mm multiplied by 100mm square, the square wood secondary edge (202) is parallel to the steel pipe secondary edge (201) and is arranged at the vertical joint of the face template (1) in the middle, and the square wood secondary edge (202) and the face template (1) are fixedly connected by iron nails; the main beam (3), the upper longitudinal beam (4) and the upper cross beam (5) are all made of phi 48mm scaffold steel pipes, wherein the main beam (3) is made of a double steel pipe structure with the diameter of 2 multiplied by phi 48mm, and the upper longitudinal beam (4) and the upper cross beam (5) are made of single phi 48mm steel pipes;
the construction method of the cement slab mold cast-in-situ gravity type embankment retaining wall concrete comprises the following steps of;
Step 1, designing parameters of a formwork system:
(1) Dividing concrete construction layering, calculating a template lateral pressure according to the maximum layering height, designing the specification and the spacing of a face template (1), a steel pipe secondary rib (201), a main rib (3) and an inner pull rod (6), and checking to be qualified to be used as a formwork supporting system design parameter;
(2) Upper longitudinal beams (4) are arranged above the surface templates on two sides of the retaining wall, the upper longitudinal beams (4) are connected through upper cross beams (5), and the upper cross beams (5) are arranged at intervals of 3m and used for reinforcing and locking the upper part of the formwork supporting system;
Step 2, foundation concrete construction: the retaining wall foundation concrete is cast in situ by adopting plywood or steel template formwork erection, and inner pull rods (6) are respectively embedded in the concrete on the top surface and the back side of the foundation during construction;
Step 3, constructing the first layer wall body concrete above the foundation:
(1) And (3) applying mortar strips: reserving the positions of a surface template (1) and a steel pipe secondary edge (201) on the top surface of the foundation concrete according to a wall surface line, paying off, and applying M7.5 mortar strips;
the mortar strip has a rectangular section with the height of 80mm and the width of 150 mm;
(2) Installing a formwork system: the steel pipe secondary rib (201) which is exposed from the surface template (1) is connected with the upper longitudinal beam (4) through a rotary fastener, and the upper longitudinal beam (4) on two sides of the wall body is connected with the upper cross beam (5) through a rotary fastener;
(3) Pouring first-layer wall body concrete after installing the end template, and pre-burying an inner pull rod (6) on the top surface of the concrete during construction;
Step 4, middle layer wall concrete construction: after the poured layer concrete is hardened, performing the construction of the upper layer of concrete, when the height of the steel pipe secondary edge (201) does not meet the formwork supporting requirement, firstly lifting the steel pipe secondary edge (201), and then disassembling the exposed face template (1) and the square wood secondary edge (202) below the steel pipe secondary edge (201) for the subsequent construction of retaining wall concrete;
(1) Moving the upper longitudinal beam (4) and the upper cross beam (5) to the upper part of the layer template to be poured for reinstallation, and installing the surface template (1), the main rib (3), the inner pull rod (6) and the butterfly buckle (7);
(2) Pouring the wall body concrete of the layer after installing the end template, and pre-burying an inner pull rod (6) on the top surface of the concrete during construction;
step 5, wall concrete construction at the counter weight station: repeating the step4 until the construction of the wall concrete at the counter weight platform is completed;
step 6, constructing the first layer wall concrete above the counterweight table:
(1) And (3) applying mortar strips: reserving the positions of a surface template (1) and a steel pipe secondary edge (201) on the top surface of the counter weight platform according to a wall back line, paying off, and configuring M7.5 mortar to manufacture strips;
the mortar strip has a rectangular section with the height of 80mm and the width of 150 mm;
(2) Installing a formwork system: the wall surface mounting face template (1), the main rib (3), the inner pull rod (6) and the butterfly buckle (7), the wall back mounting face template (1), the secondary rib (2), the main rib (3), the inner pull rod (6) and the butterfly buckle (7), the exposed steel pipe secondary rib (201) of the surface template (1) is connected with the upper longitudinal beam (4) through a rotary fastener, and the upper longitudinal beams (4) on two sides of the wall are connected with the upper cross beam (5) through rotary fasteners;
(3) Pouring wall concrete after installing the end template, and pre-burying an inner pull rod (6) on the top surface of the concrete during construction;
Step 7, constructing middle layer wall concrete above the counterweight table: repeating the step 4;
step 8, construction of the top wall body concrete of the counter weight platform: repeating the step 4, and no longer embedding the inner pull rod (6) and leveling the top surface of the concrete during construction;
step 9, wall surface treatment: the wall surface is cleaned along with the disassembly progress of the surface template, an inner pull rod (6) exposing the wall body is cut off by a hand-held grinder, and the wall surface is decorated.
2. The construction method of the plywood form cast-in-situ gravity type embankment retaining wall concrete according to claim 1, which is characterized in that; the surface template (1) is made of plywood, and the layered building height of the surface template (1) is controlled by the width of the plywood.
3. The construction method of the plywood form cast-in-situ gravity type embankment retaining wall concrete according to claim 1, which is characterized in that; the inner pull rod (6) is made of steel bars with the diameter of 12mm to 14 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210490451.2A CN114657940B (en) | 2022-05-07 | 2022-05-07 | Formwork supporting system for cement slab formwork cast-in-situ gravity type embankment retaining wall concrete and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210490451.2A CN114657940B (en) | 2022-05-07 | 2022-05-07 | Formwork supporting system for cement slab formwork cast-in-situ gravity type embankment retaining wall concrete and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114657940A CN114657940A (en) | 2022-06-24 |
| CN114657940B true CN114657940B (en) | 2024-05-14 |
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| CN202210490451.2A Active CN114657940B (en) | 2022-05-07 | 2022-05-07 | Formwork supporting system for cement slab formwork cast-in-situ gravity type embankment retaining wall concrete and construction method |
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| CN115977145A (en) * | 2023-01-10 | 2023-04-18 | 中国十七冶集团有限公司 | Upward-inclined rubble concrete retaining wall single-side formwork reinforcing structure system and method |
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