CN114481827A - Integrally assembled reinforced concrete slab bridge structure and construction method thereof - Google Patents
Integrally assembled reinforced concrete slab bridge structure and construction method thereof Download PDFInfo
- Publication number
- CN114481827A CN114481827A CN202110402850.4A CN202110402850A CN114481827A CN 114481827 A CN114481827 A CN 114481827A CN 202110402850 A CN202110402850 A CN 202110402850A CN 114481827 A CN114481827 A CN 114481827A
- Authority
- CN
- China
- Prior art keywords
- concrete slab
- bridge structure
- reinforced concrete
- slab bridge
- assembled integral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an assembled integral reinforced concrete slab bridge structure and a construction method thereof, the assembled integral reinforced concrete slab bridge structure comprises a concrete slab layer, a reinforced reinforcement cage is fixedly embedded in the concrete slab layer, the reinforced reinforcement cage comprises longitudinal reinforcements and transverse connecting rings, the surfaces of the longitudinal reinforcements are bent to form bending parts, combined connecting parts are respectively formed on the two side surfaces of the bending parts, the surfaces of the transverse connecting rings are fixedly connected to one side surface of the combined connecting parts, reinforced connecting reinforcements are fixedly connected to one side surface of the transverse connecting rings, connecting cylinders are fixedly embedded on one side surface of the concrete slab layer, the structural strength is ensured by embedding the reinforced reinforcement cage in the concrete slab layer, different bending parts and combined connecting parts are formed by bending the longitudinal reinforcements, and the lifting and transferring are facilitated after the forming through embedding the connecting cylinders in the surface, therefore, the convenience and the stability of use can be greatly improved, the safety and the high efficiency of construction are ensured, and the popularization is convenient.
Description
Technical Field
The invention relates to the field of concrete slab bridges, in particular to an assembled integral reinforced concrete slab bridge structure and a construction method thereof.
Background
In the current social life and development, the construction of highways is more and more, the scale of bridges crossing rivers and arriving roads is larger and larger, and in order to ensure the construction period, an integrally assembled slab bridge structure is generally required to be used and can be directly combined and spliced.
But among the current concrete slab bridge structure, consolidate through the reinforcing bar of built-in single direction mostly, then the shaping is directly pour to the shaping, and not only the rigidity of framework of steel reinforcement is more weak like this, is unfavorable for combining with the concrete stability, and factor of safety is not enough, influences the shaping efficiency when pouring the structure, also is unfavorable for lifting after the slab bridge shaping to transport the installation in addition, influences follow-up construction and reduces, remains to propose a new structural style.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an assembled integral reinforced concrete slab bridge structure and a construction method thereof, wherein a reinforced reinforcement cage is embedded inside a concrete slab layer to ensure the structural strength, meanwhile, different bending parts and combined connecting parts are formed by bending longitudinal reinforcements to ensure the stability of multi-layer structure combination, and a transverse connecting ring is combined for reinforcement and support, so that a cage-shaped frame is formed by weaving, the integral framework is formed by convenient installation and positioning, the safety and stability coefficient is high, the construction is not influenced by embedding a connecting cylinder in the surface, the lifting and the transportation are facilitated after the forming, the combined installation is facilitated, the convenience and the stability in use can be greatly improved, the safety and the high efficiency of the construction are ensured, and the popularization is facilitated.
In order to solve the above problems, the present invention adopts the following technical solutions.
An assembled integral reinforced concrete slab bridge structure and a construction method thereof comprise a concrete slab layer, wherein a reinforced reinforcement cage is fixedly embedded in the concrete slab layer and comprises longitudinal reinforcements and transverse connecting rings, the surface of each longitudinal reinforcement is bent to form a bent part, combined connecting parts are respectively formed on the two side surfaces of each bent part, the surface of each transverse connecting ring is fixedly connected to one side surface of each combined connecting part, one side surface of each transverse connecting ring is fixedly connected with a reinforced connecting reinforcement, and one side surface of the concrete slab layer is fixedly embedded with a connecting cylinder;
the construction method comprises the following steps:
s1, bending the longitudinal steel bar by using a bending machine to form a bent part;
s2, forming a combined connecting part on two sides of the bending part, crossing the surfaces of two sides of the transverse connecting ring, and binding and positioning;
s3, combining and splicing the transverse connecting rings, connecting and reinforcing connecting steel bars at the gap positions, and binding and positioning;
s4, sequentially connecting two layers of longitudinal steel bars and transverse connecting rings according to the designed length and width to form a reinforcing steel bar cage in a combined mode;
S5, placing the reinforcement cage into a pouring mold, pouring concrete, and embedding a connecting cylinder into the surface of the reinforcement cage;
and S6, curing the concrete, and demolding after solidification to complete the concrete slab bridge structure.
Further, a reinforcing protrusion is arranged on the surface of one side of the connecting cylinder, the surface of the reinforcing protrusion is fixedly embedded in the side face of the concrete slab layer, the reinforcing protrusion is arranged on the surface of the connecting cylinder, the embedded contact area can be increased, and the structural safety is improved.
Furthermore, the one end surface of connecting cylinder is equipped with connecting screw hole, connecting screw hole's one end opening is located a side surface on concrete slab layer, through set up connecting screw hole on the connecting cylinder surface, can connect rings and lift by crane, makes things convenient for the drawing of patterns to transport and aggregate erection, and is safe high-efficient.
Furthermore, one end of the transverse connecting ring is provided with a winding edge, the surface of the winding edge is fixedly wound and connected to one side surface of the transverse connecting ring, the winding edge is connected with the transverse connecting ring, the transverse connecting ring can be bent into a complete annular structure, and the structural strength is guaranteed.
Furthermore, the side on winding limit is equipped with the joint gap, joint gap's side fixed connection is in the surface of consolidating the joint reinforcement, consolidates the joint reinforcement through the joint gap installation, does benefit to and combines a plurality of transverse connection rings, guarantees overall structure frame's intensity, avoids loose, safety and stability.
Furthermore, the surface of the reinforcing connecting steel bar is fixedly bound with a steel wire, the surface of the steel wire is wound and bound on one side surface of the transverse connecting ring, and the steel wire is bound and positioned, so that the operation is facilitated, and the steel wire is convenient and stable.
Furthermore, the longitudinal reinforcing steel bars have two sides and are respectively and fixedly connected to the two end surfaces of the transverse connecting rings.
Further, the steel wire is flexible iron wire, and the diameter is 1.2 millimeters to 1.6 millimeters.
Further, the bent portion at the step of S1 has a distance between the bent portions twice as long as the bent length of the bent portion.
Further, the step S5 is to seal and protect the connection threaded hole.
Compared with the prior art, the invention has the advantages that:
(1) this scheme guarantees structural strength through at the concrete slab piece in situ portion embedded reinforcement cage, buckles through vertical reinforcing bar simultaneously and forms different kink and built-up connection portion, guarantee the stability of multilayer structure combination, combine horizontal go-between to consolidate the support, do benefit to weave and form cage form frame, the easy to assemble location forms whole skeleton, the safety and stability coefficient is high, and through the embedded connecting cylinder in surface, can not influence the constitution, do benefit to after the shaping and lift by crane the transportation, the easy to assemble installation.
(2) Through set up the reinforcement arch on the connecting cylinder surface, can increase embedded area of contact, improve the structural safety.
(3) Through set up connecting thread hole on the connecting cylinder surface, can connect rings and lift by crane, make things convenient for the drawing of patterns to transport and aggregate erection, it is safe high-efficient.
(4) The winding edge is connected with the transverse connecting ring, so that the winding edge can be bent into a complete annular structure, and the structural strength is ensured.
(5) The connection steel bars are installed and reinforced through the connection gaps, so that the combination of a plurality of transverse connection rings is facilitated, the strength of the integral structure frame is guaranteed, looseness is avoided, and safety and stability are realized.
(6) Bind the location through the steel wire, do benefit to the operation, convenient stability.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the connection barrel of FIG. 1 of the present invention at A;
figure 3 is a side use view of the transverse connecting ring and reinforcing connecting bar combination of the present invention.
The reference numbers in the figures illustrate:
1 concrete slab layer, 11 reinforcing steel bar cages, 12 transverse connecting rings, 13 connecting cylinders, 14 longitudinal steel bars, 15 bent parts, 16 combined connecting parts, 17 reinforcing connecting steel bars, 2 reinforcing protrusions, 21 connecting threaded holes, 22 winding edges, 23 connecting gaps and 24 steel wires.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Referring to fig. 1-3, an assembled integral reinforced concrete slab bridge structure and a construction method thereof includes a concrete slab layer 1, referring to fig. 1, a reinforcing reinforcement cage 11 is fixedly embedded in the concrete slab layer 1, a reinforcing inner core of a complete frame structure can be formed, the stability of the overall structure is improved, meanwhile, the cast molding is not interfered, the construction is facilitated, safety and stability are achieved, the reinforcing reinforcement cage 11 includes longitudinal reinforcements 14 and transverse connection rings 12, a bending portion 15 is formed by bending the surface of the longitudinal reinforcements 14, combined connection portions 16 are respectively formed on the two side surfaces of the bending portion 15, the surface of the transverse connection ring 12 is fixedly connected to one side surface of the combined connection portion 16, a reinforcing connection reinforcement 17 is fixedly connected to one side surface of the transverse connection ring 12, a connection tube 13 is fixedly embedded on one side surface of the concrete slab layer 1, and embedded installation can be performed on the surface, the integrated pouring molding is beneficial to later hoisting and transferring, is safe and efficient, and is convenient to construct and construct;
The construction method comprises the following steps:
s1, bending the longitudinal steel bar by using a bending machine to form a bent part;
s2, forming a combined connecting part on two sides of the bending part, crossing the surfaces of two sides of the transverse connecting ring, and binding and positioning;
s3, combining and splicing the transverse connecting rings, connecting and reinforcing connecting steel bars at the gap positions, and binding and positioning;
s4, sequentially connecting two layers of longitudinal steel bars and transverse connecting rings according to the designed length and width to form a reinforcing steel bar cage in a combined mode;
s5, placing the reinforcing steel bar cage into a pouring mold, pouring concrete, and embedding a connecting cylinder in the surface;
and S6, curing the concrete, and demolding after solidification to complete the concrete slab bridge structure.
Please refer to fig. 1 and 2, a reinforcing protrusion 2 is disposed on a side surface of the connecting cylinder 13, the surface of the reinforcing protrusion 2 is fixed and embedded in a side surface of the concrete slab block layer 1, the reinforcing protrusion 2 is disposed on the surface of the connecting cylinder 13, so that the embedded contact area can be increased, the structural safety is improved, a connecting threaded hole 21 is disposed on a surface of one end of the connecting cylinder 13, an opening at one end of the connecting threaded hole 21 is located on a side surface of the concrete slab block layer 1, the connecting threaded hole 21 is disposed on the surface of the connecting cylinder 14, and the connecting cylinder can be connected with a lifting ring for lifting, thereby facilitating demolding, transferring and assembling, and being safe and efficient.
Referring to fig. 1 and 3, a winding edge 22 is disposed at one end of the transverse connection ring 12, the winding edge 22 is fixedly wound on a side surface of the transverse connection ring 12, the transverse connection ring 12 is connected by the winding edge 22 and can be bent into a complete annular structure, so as to ensure structural strength, a connection gap 23 is disposed on a side surface of the winding edge 22, the side surface of the connection gap 23 is fixedly connected to a surface of the reinforcing connection steel bar 17, the reinforcing connection steel bar 17 is installed through the connection gap 23, so that the plurality of transverse connection rings 12 can be combined together, the strength of the overall structural frame can be ensured, loosening can be avoided, safety and stability can be achieved, a steel wire 24 is bound on the surface of the reinforcing connection steel bar 17, the surface of the steel wire 24 is bound on a side surface of the transverse connection ring 12, and is bound and positioned by the steel wire 24, so as to facilitate operation and stability.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by the equivalent or modified embodiments and the modified concepts of the present invention.
Claims (10)
1. An assembled integral reinforced concrete slab bridge structure, comprising a concrete slab layer (1), characterized in that: the reinforced concrete slab block layer is characterized in that a reinforced reinforcement cage (11) is fixedly embedded in the concrete slab block layer (1), the reinforced reinforcement cage (11) comprises longitudinal reinforcements (14) and transverse connecting rings (12), a bending part (15) is formed by bending the surface of the longitudinal reinforcements (14), combined connecting parts (16) are respectively formed on the two side surfaces of the bending part (15), the surface of each transverse connecting ring (12) is fixedly connected to one side surface of each combined connecting part (16), reinforced connecting reinforcements (17) are fixedly connected to one side surface of each transverse connecting ring (12), and a connecting cylinder (13) is fixedly embedded in one side surface of the concrete slab block layer (1);
the construction method comprises the following steps:
s1, bending the longitudinal steel bar by using a bending machine to form a bent part;
s2, forming a combined connecting part on two sides of the bending part, crossing the surfaces of two sides of the transverse connecting ring, and binding and positioning;
s3, combining and splicing the transverse connecting rings, connecting and reinforcing connecting steel bars at the gap positions, and binding and positioning;
s4, sequentially connecting two layers of longitudinal steel bars and transverse connecting rings according to the designed length and width to form a reinforcing steel bar cage in a combined mode;
S5, placing the reinforcing steel bar cage into a pouring mold, pouring concrete, and embedding a connecting cylinder in the surface;
and S6, curing the concrete, and demolding after solidification to complete the concrete slab bridge structure.
2. An assembled integral reinforced concrete slab bridge structure according to claim 1, wherein: the surface of one side of connecting cylinder (13) is equipped with and consolidates protruding (2), the fixed surface of consolidating protruding (2) is inlayed in the side of concrete slab layer (1).
3. An assembled integral reinforced concrete slab bridge structure according to claim 1, wherein: and a connecting threaded hole (21) is formed in the surface of one end of the connecting cylinder (13), and an opening at one end of the connecting threaded hole (21) is formed in the surface of one side of the concrete slab layer (1).
4. An assembled integral reinforced concrete slab bridge structure according to claim 1, wherein: one end of the transverse connecting ring (12) is provided with a winding edge (22), and the surface of the winding edge (22) is fixedly wound and connected on one side surface of the transverse connecting ring (12).
5. An assembled integral reinforced concrete slab bridge structure according to claim 4, wherein: the side of the winding edge (22) is provided with a connecting gap (23), and the side of the connecting gap (23) is fixedly connected to the surface of the reinforced connecting steel bar (17).
6. An assembled integral reinforced concrete slab bridge structure according to claim 1, characterized in that: the surface of the reinforcing connecting steel bar (17) is fixedly bound with a steel wire (24), and the surface of the steel wire (24) is wound and bound on one side surface of the transverse connecting ring (12).
7. An assembled integral reinforced concrete slab bridge structure according to claim 1, wherein: the longitudinal steel bars (14) are provided with two sides and are respectively and fixedly connected to the two end surfaces of the transverse connecting rings (12).
8. An assembled integral reinforced concrete slab bridge structure according to claim 6, wherein: the steel wire (24) is a flexible iron wire and has a diameter of 1.2 mm to 1.6 mm.
9. An assembled integral reinforced concrete slab bridge structure according to claim 1, characterized in that: the bent portion interval distance of the step of S1 is twice the bent length of the bent portion.
10. An assembled integral reinforced concrete slab bridge structure according to claim 1, wherein: the step of S5 is that the embedded connecting cylinder also comprises a sealing protection for the connecting threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402850.4A CN114481827A (en) | 2021-04-15 | 2021-04-15 | Integrally assembled reinforced concrete slab bridge structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402850.4A CN114481827A (en) | 2021-04-15 | 2021-04-15 | Integrally assembled reinforced concrete slab bridge structure and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114481827A true CN114481827A (en) | 2022-05-13 |
Family
ID=81491602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110402850.4A Pending CN114481827A (en) | 2021-04-15 | 2021-04-15 | Integrally assembled reinforced concrete slab bridge structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114481827A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2075232U (en) * | 1990-07-04 | 1991-04-17 | 景全德 | Concrete electric pole with wave shaped steel wrie ring reinforced rod |
| RU2137892C1 (en) * | 1998-07-14 | 1999-09-20 | Воронежская государственная архитектурно-строительная академия | Reinforcement framework for building structure |
| JP2004197326A (en) * | 2002-12-16 | 2004-07-15 | Musashino Kiko Kk | Insert embedding method, set boss, and insert |
| CN102852254A (en) * | 2012-08-10 | 2013-01-02 | 上海理想家园工程营造有限公司 | Multi-functional template floor structural system for quickly building and construction method thereof |
| KR20160023247A (en) * | 2014-08-21 | 2016-03-03 | (주)월드피씨 | Road decking panel having concrete crack protection and manufacture convenience |
| CN109577192A (en) * | 2018-11-21 | 2019-04-05 | 璁稿嘲 | It is built-in with the precast bridge plate of framework of steel reinforcement |
| CN112609867A (en) * | 2020-12-18 | 2021-04-06 | 程松林 | Prefabricated shear wall cavity with three-dimensional efficient connection structure and connection node configuration |
-
2021
- 2021-04-15 CN CN202110402850.4A patent/CN114481827A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2075232U (en) * | 1990-07-04 | 1991-04-17 | 景全德 | Concrete electric pole with wave shaped steel wrie ring reinforced rod |
| RU2137892C1 (en) * | 1998-07-14 | 1999-09-20 | Воронежская государственная архитектурно-строительная академия | Reinforcement framework for building structure |
| JP2004197326A (en) * | 2002-12-16 | 2004-07-15 | Musashino Kiko Kk | Insert embedding method, set boss, and insert |
| CN102852254A (en) * | 2012-08-10 | 2013-01-02 | 上海理想家园工程营造有限公司 | Multi-functional template floor structural system for quickly building and construction method thereof |
| KR20160023247A (en) * | 2014-08-21 | 2016-03-03 | (주)월드피씨 | Road decking panel having concrete crack protection and manufacture convenience |
| CN109577192A (en) * | 2018-11-21 | 2019-04-05 | 璁稿嘲 | It is built-in with the precast bridge plate of framework of steel reinforcement |
| CN112609867A (en) * | 2020-12-18 | 2021-04-06 | 程松林 | Prefabricated shear wall cavity with three-dimensional efficient connection structure and connection node configuration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108867855B (en) | Vertical and horizontal integral laminated concrete frame structure and laminated molded body | |
| CN102041778B (en) | Method for constructing precast coping for bridge | |
| CN109736479B (en) | Assembly type shear wall joint structure and splicing method thereof | |
| WO2020211175A1 (en) | Fabricated reinforced concrete bridge pier and construction method therefor | |
| CN214696113U (en) | Connection structure of assembled prefabricated floor and composite beam | |
| WO2004059089A1 (en) | Prestressed composite girder, continuous prestressed composite girder structure and methods of fabricating and connecting the same | |
| CN114592436A (en) | Pier capping beam lower support system and construction method thereof | |
| CN114481827A (en) | Integrally assembled reinforced concrete slab bridge structure and construction method thereof | |
| CN109267489B (en) | Construction method for cable-stayed bridge cable tower anchoring area | |
| CN109577169B (en) | Assembled concrete box girder structure based on steel structure transverse coupling system and construction method | |
| CN215211802U (en) | Novel prefabricated floor slab and connecting structure thereof | |
| CN205421710U (en) | Permanent beam mold board, concrete structure component are connected to arrangement of reinforcement formula buckle | |
| CN212865473U (en) | Prefabricated assembled type lane plate | |
| CN112281634A (en) | Rib plate hybrid connecting structure with supporting and rear cantilever arms of spine beam bridge | |
| CN208733810U (en) | A kind of assembled overlapping beam and slab construction | |
| CN207776235U (en) | A kind of Prefabricated porous plate being connected | |
| CN212316640U (en) | Assembled bridge | |
| CN214994574U (en) | Prefabricated structure of bottom plate of assembled sewage pool | |
| CN219174982U (en) | Cast-in-situ prestressed concrete box girder | |
| CN213509130U (en) | Fully-assembled prefabricated floor slab structure | |
| CN220058301U (en) | Connection structure of reinforced concrete beam | |
| CN210482795U (en) | Prefabricated staircase | |
| CN218177370U (en) | Groove-filling type bamboo-joint-shaped precast concrete wind power tower cylinder | |
| CN217782523U (en) | Connection structure of post-cast section of prefabricated superimposed sheet | |
| CN214143331U (en) | UHPC that concreting pier was used exempts from form removal template |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |