361 results about "Upper floor" patented technology

A piece of furniture includes a furniture body with an upper floor and a flap, and at least one flap fitting being arranged on the upper floor in order to hold the flap movably between a position closing a storage space of the furniture body and an opening position. The flap fitting includes a housing, on which a support arm is rotatably mounted, which includes a retaining element for fixing the flap, and an energy store, by means of which a force can be applied to the support arm, the support arm being articulatedly connected to a drive lever, which is articulatedly connected to a deflection lever. An opening limiter is provided between the drive lever and the deflection lever, by means of which the maximum opening position of the support arm can be adjusted. This allows the flap fitting to be flexibly adapted to the respective installation position.

The invention provides a large curtain wall pre-embedding-free keel installation system and an installation method, which overcome the problems of a traditional keel pre-embedding construction scheme, reduce the installation cost, improve the installation precision, the construction efficiency and the reliability, reduce the safety risk and reduce the influence on a main body structure, and comprise a reinforced concrete slab and a reinforced concrete beam, an upper end plate and a lower end plate are respectively arranged on the top surface and the bottom surface of the reinforced concrete beam; the outer side and the inner side of the reinforced concrete beam are each provided with a plurality of vertically-distributed screws, and the upper ends and the lower ends of the screws located on the outer side of the reinforced concrete beam are connected with the upper end plate and the lower end plate correspondingly. When the curtain wall main keel is installed, the curtain wall main keel is located between two reinforced concrete beams corresponding to an upper floor and a lower floor of a building, the upper end of the curtain wall main keel is connected with the lower end plate located on the upper layer, and the lower end of the curtain wall main keel is connected with the upper end plate located on the lower layer.

The floor overhead layer module comprises an upper floor, a lower floor and a plurality of overhead supporting columns, the overhead supporting columns are regularly distributed on the upper surface of the lower floor, and a plurality of first mounting grooves in one-to-one correspondence with the overhead supporting columns are concavely formed in the lower surface of the upper floor; the tops of the multiple overhead supporting columns are installed in the corresponding first installation grooves so as to support and fix the upper floor, and then an overhead space is formed between the lower floor and the upper floor. According to the technical scheme, the technical problems that an existing ground air supply duct structure is difficult to construct, only small-air-volume circulating air supply can be conducted, and the circulating air volume or the circulating number of times of an all-air system cannot be met can be effectively solved.

The invention discloses a vibration reduction floor, and relates to the technical field of vibration reduction equipment, the vibration reduction floor is applied to a building, the vibration reduction floor comprises a vibration reduction cushion layer and an upper floor, the vibration reduction cushion layer comprises a first cushion layer and a second cushion layer, the first cushion layer is horizontally laid on a floor of the building, and the second cushion layer is laid along the edge of the bottom of a wall of the building; the second cushion layer is connected with the first cushion layer, and a first area is defined by the first cushion layer and the second cushion layer; the upper floor comprises a concrete layer and floor tiles, and the concrete layer is laid in the first area; the floor tiles are laid on the concrete layer, and the floor tiles are located in the first area; the overall resonance frequency of the anti-vibration cushion layer and the upper floor is smaller than or equal to 30 Hz. The upper floor is laid in the first area of the anti-vibration cushion layer to provide vibration reduction for the upper floor, and due to the fact that the overall resonance frequency of the anti-vibration cushion layer and the upper floor is smaller than or equal to 30 Hz, indoor vibration of sensitive buildings caused by vibration of urban rail transit can be effectively reduced.

The present invention discloses a multi-layer reinforcement protection device, including a counterweight box, in which a driving motor is arranged, and the driving motor is connected to a supporting cantilever through a gear transmission. The application adopts a multi-layer height design, which can play a buffering and insurance role for people in three times. The first layer is a dense mesh protection net, which is closer to the upper floor, and the horizontal cantilever is relatively short. When the worker steps on the air, it can quickly play a supporting role, and at the same time, it can play a role in receiving the small parts that roll down; the extension distance of the second layer of horizontal cantilever is greater than the extension distance of the first layer, and it can play a role in receiving when the worker steps on the air and flips back. The second layer adopts a large-aperture protection net, which mainly plays a role in buffering the human body, connecting the joints such as the feet, and increasing the probability of people grabbing the second layer of protection net. The third layer of protection net is closest to the support layer of the bottom layer, can withstand the maximum torque, and extends the farthest outside the floor, which is used to receive heavy objects and workers who are knocked over by the second layer.

The present application relates to the field of mining area subsidence reduction and filling mining, in particular to a floor isolation grouting filling control surface subsidence mining method; a certain thickness of rock stratum is selected as a floor pressure bearing protective layer below a floor failure zone, the floor pressure bearing protective layer arches under grouting pressure, but no fissure leading to the upper floor failure zone is generated; the floor pressure bearing protective layer bottom interface is taken as a grouting layer, a grouting borehole is connected to the grouting layer; working face mining is carried out, when grouting filling can be carried out, filling slurry is injected from the grouting borehole to the grouting layer. The filling slurry lifts the floor grouting pressure bearing layer and the floor failure zone under high pressure, finally fills the entire goaf, reduces the breaking degree of the coal seam roof, controls the subsidence amplitude of the overlying strata, and further reduces the surface subsidence amplitude. In the present application, the mining and grouting filling processes are separated, the influence of grouting filling operation on working face mining is avoided, and the present application is particularly suitable for coal mine areas with dense buildings.

The utility model discloses a building security and protection monitoring system, which is used for security and protection monitoring in building floors, and is characterized by comprising a camera shooting module provided with a plurality of network cameras, and one network camera is arranged in each floor; the wireless transmission module is provided with a plurality of wireless gateways, one wireless gateway is arranged in each floor, a wireless network is connected with a network camera, the wireless gateway on the upper floor is sequentially cascaded with the wireless gateway on the lower floor, a router is arranged on the roof, an SIM (Subscriber Identity Module) card is arranged in the router, and the router is respectively connected with the wireless gateway on the uppermost floor and the monitoring center; the power supply module is provided with a plurality of energy storage battery modules, each floor is provided with one energy storage battery module, and the energy storage battery modules are respectively connected with the network cameras and the wireless gateways in the corresponding floors; according to the invention, wiring-free deployment of the monitoring system for the rear stair area of the old building is realized. And wireless signals are kept stable through short-distance multi-hop transmission.

The novel edge constructional column aluminum formwork construction device comprises a support arranged on an upper floor slab and an aluminum alloy formwork, the support is in a cross shape, pulleys are arranged at the two ends and the top of the support, and the novel edge constructional column aluminum formwork construction device further comprises a connecting steel plate arranged on the upper floor slab. The connecting steel plates are respectively welded on the upper surface of the upper floor and the floor wall surface; according to the method for driving the aluminum formwork through the support, in the actual construction process, operability is high, increase and decrease can be conducted according to the site reality, installation is convenient, meanwhile, installation is rapid and convenient, after an external scaffold is dismantled, installation is conducted through a crank arm vehicle in a traditional mode, time and labor are consumed, the installation time of workers can be effectively shortened, applicability is high, and the construction efficiency is improved. Installation and detachment are convenient, construction elevators and other machines and tools can be adopted for transportation upstairs, the requirements for sites and environments are not high, the rubber sealing strips additionally arranged on the two sides of the aluminum formwork can effectively prevent slurry leakage, and the engineering quality and the finished product effect are guaranteed.

A building includes a floor located between an upper floor and a lower floor. The floor includes first floor extending members and second floor extending members that intersect the first floor extending members. The first floor extending members and the second floor extending members are made of wood. A reinforcement member is arranged in at least one of a section between two of the first floor extending members and a section between two of the second floor extending members.

This invention discloses an installation method for a time-zone-division circular pedestal curtain wall. The time-zone-division circular pedestal curtain wall includes time-zone-division curtain wall units. A set of curtain wall glass is arranged with 24 units corresponding to 24 time zones, forming a pedestal shape that is smaller at the top and larger at the bottom. A time zone pointer is also provided at the top of the curtain wall glass, and the projection of the time zone pointer is projected onto the outer surface of the curtain wall glass. This invention facilitates the lighting and aesthetic requirements of the central area by setting a continuous circular pedestal curtain wall in the middle of the corridor. The setting of the lower and upper floor sloping walls facilitates the installation of the curtain wall keel, providing a fixed foundation and ensuring the overall structural integrity. The time-zone setting of the curtain wall glass ensures both aesthetic appeal and ease of installation while improving lighting efficiency. The setting of the time zone pointer and the pointer connecting wall further makes the central curtain wall resemble a sundial, enriching the structural types, and the pointer connecting wall at the connection point ensures the stability of the installation.

The invention relates to a prefabricated building wallboard connecting piece capable of dissipating energy and a prefabricated building wallboard, the prefabricated building wallboard connecting piece comprises a plurality of first connecting pieces and a plurality of second connecting pieces, and the first connecting pieces and the second connecting pieces are arranged at the top of the wallboard and used for connecting the wallboard and an upper floor beam slab; the first connecting piece comprises a first supporting groove and a first supporting piece, the first supporting piece is matched with the first supporting groove in an inserted mode, and the first connecting piece is configured to be in sliding friction between the first supporting groove and the first supporting piece and generate friction damping when the upper floor beam plate and the wall plate are relatively close to each other; the second connecting piece comprises a second supporting groove and a second supporting piece, the second supporting piece is matched with the second supporting groove in an inserted mode, and the second connecting piece is configured to be in sliding friction between the second supporting groove and the second supporting piece and generate friction damping when the upper floor beam plate and the wall plate are relatively away from each other; the two connecting pieces generate friction damping in the vertical direction and the horizontal direction.

The application discloses a construction operation platform of an ultra-high full-closed wind well structure and a construction operation method. When a floor is lifted, a supporting corner is adjusted on a screw rod through an adjusting nut, the supporting corner is close to a square steel frame, the supporting corner no longer supports an inner wall of the wind well, a universal ball is rotated out of the screw rod, a rolling ball body of the universal ball is in rolling contact with the inner wall of the wind well, a tower crane is lifted through a lifting ring, the lifting ring pulls a steel plate, the steel plate pulls the square steel frame to roll and lift on the inner wall of the wind well, and the square steel frame is installed at a mounting position of an upper floor. After a wall-penetrating bolt is used for construction, the square steel frame is installed, the universal ball is rotated into the screw rod and no longer in contact with the inner wall of the wind well, and the supporting corner is adjusted to abut against the inner wall of the wind well to limit the square steel frame. The construction operation platform can be built in the wind well and lifted without disassembly, the problem that the rod body needs to be disassembled and reassembled when the floor is lifted is solved, and the construction efficiency is improved.

The invention provides an assembly type steel truss-concrete composite floor system and an assembly method thereof, and relates to the technical field of floor system buildings. The structure comprises at least one combination box, the combination box comprises a box beam, at least one upper floor slab and at least one lower floor slab, the box beam is arranged on the bearing column, an upper containing groove is formed in the top of the box beam, a lower containing groove is formed in the bottom of the box beam, and the upper floor slab and the lower floor slab are arranged in the upper containing groove. The upper floor slab is arranged in the upper containing groove and connected with the box beam, and the lower floor slab is arranged in the lower containing groove and connected with the box beam. The lower bottom surface of the floor system does not need to be leveled by workers through operations such as ceiling mounting in the later period, and the effect of low construction burden is achieved.

The present invention provides a reinforced concrete and wooden high-rise building with seismic isolation capabilities, which also allows for the stable support of the elevator shaft while avoiding interference with the lower floors. [Solution] A seismically isolated high-rise building 10 includes a lower floor 20 made of reinforced concrete and an upper floor 30 made of wood hybrid structure, wherein an intermediate seismic isolation layer 40 is provided between the lower floor 21 and the upper floor 22 of the lower floor 20. An elevator shaft 35 is supported by the upper floor 30 and extends to a height reaching the floor slab 21a of the lowest floor of the lower floor 20, and is supported inside the concrete core section 50. The elevator shaft 35 is inserted between the ceiling slab 41 and the floor slab 21a of the lower floor 21, maintaining a spacing of 41c, 21c between them and the opening edges of the insertion openings formed in the ceiling slab 41 and floor slab 21a.

The aim is to provide a lightweight, inexpensive, and easy-to-install semi-underground unit that is unaffected by the live and dead loads of the upper floors of the building. [Solution] The semi-underground unit of the present invention consists of a factory-produced top cover plate, a residential unit or interior wall unit, a soil pressure reinforcement unit, and a retaining wall block body formed on-site. The top cover plate is provided with an entrance that connects to a stair cover unit connected to the underside of the building's floor. The residential unit or interior wall unit consists of a box-shaped lightweight steel frame formed of a structural seismic-resistant and reinforced structure such as a wall structure. The soil pressure reinforcement unit consists of a box-shaped lightweight steel frame formed of a structural seismic-resistant and reinforced structure such as a rigid frame structure and a wall structure that protrudes and opens to the ground surface. The retaining wall block body consists of a hollow box-shaped concrete wall whose upper surface protrudes and opens to the ground surface.

This building is a hospital that has a multi-story parking lot and a linear accelerator housing facility, among other things. In this building, the retaining wall that forms the underground seismic isolation pit provided in the main building is raised higher than the ground, and a waterproof wall is formed to surround the main building. Therefore, the main building has a flood prevention function along with the seismic isolation structure. In addition, by providing the loading and unloading entrances for goods on the upper floors of the main building, there is no need to form a wide entrance for loading and unloading vehicles in the waterproof wall, and the flood prevention function of the main building is further enhanced. Also, by separating the floor of the loading and unloading entrance from the floor of the user entrance (the first floor), the flow lines of the management side and the users are clearly separated, enabling smoother hospital operation.

The utility model discloses an adjustable elevator shaft operation platform device which comprises a construction platform plate, expansion plates are movably connected to the front side, the rear side and the left side of the construction platform plate, an anchoring plate is movably connected to the middle of the right side of the construction platform plate, and a platform framework is fixedly connected to the lower side of the construction platform plate. Two vertical sliding rods extending downwards are fixedly connected to the middle of the right side of the platform framework. The construction platform can drive the self-climbing frame mechanism to ascend through the driving mechanism, the self-climbing frame mechanism can be automatically hung on an upper floor through the second telescopic supporting mechanism after ascending to the upper layer, and then the self-climbing frame mechanism drives the construction platform to ascend through the driving mechanism. The first telescopic supporting mechanism of the construction platform plate at the bottom of the vertical sliding rod is automatically supported on the lower floor and just ascends to cross the upper surface of the upper floor, so that automatic climbing is achieved, and repeated lifting or repeated mounting and dismounting are not needed.

The construction method comprises the following steps: after a predetermined tunneling task of an upper step is finished, a tunneling part carries out tunneling operation of a lower step in a region where the construction of the lower step is located; upper step construction operation is synchronously carried out on the upper step; after the lower step tunneling operation is completed, lower step construction operation is synchronously carried out; before the operation of the upper floor stand, the unit vehicle is moved, the tunneling part is moved to the tunnel face to carry out the next cycle of upper step tunneling operation, and parallel operation of upper step construction and lower step construction is realized through the cycle; according to the scheme, the problems that mechanical equipment of all functional blocks in the front excavation primary support process of the front tunnel face is difficult to connect and parallel construction cannot be achieved are solved, the primary support ring forming process of new Austrian method construction is completed through mechanical and integrated rack integrated equipment, the safety step pitch is effectively controlled, and the excavation efficiency and safety are improved.

To provide a joint.SOLUTION: A joint is installed in an open hole formed on a floor slab of a building and has an aggregate part having a vertical pipe connection part to be connected to a vertical pipe extending from the upper floor and a horizontal pipe connection part to be connected to a horizontal pipe, an upper cylindrical part that connects the vertical pipe connection part and the aggregate part and has a larger inner diameter than that of the vertical pipe, and a lower connection part to be connected to the vertical pipe extending from the lower floor. At least any of the upper cylindrical part, the aggregate part, and the lower connection part is formed of resin. A first rotary member is disposed in either the upper cylindrical part or the aggregate part. A second rotary member is disposed in the lower connection part.SELECTED DRAWING: Figure 1

The invention provides an efficient, reinforced and easy-to-construct medical building radiation protection system, which comprises a wall body structure, and is characterized in that the wall body structure comprises an upper floor slab, a lower floor slab and four enclosing walls; the multiple bearing frame bodies are fixedly installed at the bottom of the upper floor slab and on the enclosing wall in an array mode, and the bearing frame bodies are transversely arranged; the assembly type protection mechanism is installed on the bearing frame body, the assembly type protection mechanism design is adopted, installation is convenient, in the assembly type protection mechanism, a connecting piece is installed on the bearing frame body in a sliding mode, and a clamping groove is formed between a clamping piece and the connecting piece and used for clamping and fixing a first lead plate; and the clamping piece is detachably connected with the connecting piece, so that the lead plates are convenient to maintain, and the lead plates I with different thicknesses can be mounted according to use requirements.

The present invention discloses a broadband magnetoelectric dipole antenna with second harmonic suppression. The antenna comprises: an antenna feed structure comprising a bottom dielectric substrate, a rod-shaped stripline, and an H-shaped slot. The bottom dielectric substrate is provided with an upper floor and a lower floor, respectively, on both surfaces thereof. The H-shaped slot is etched into the upper floor, and the rod-shaped stripline is disposed within the bottom dielectric substrate. An antenna radiator structure comprises a top dielectric substrate, a main patch disposed on the top surface of the top dielectric substrate, and the main patch is connected to the upper floor via a grounded metal post. An antenna filter structure comprises an open resonant ring, a grounded metal branch, and a feeder branch. The open resonant ring is printed on the top surface of the top dielectric substrate. The grounded metal branch is located within the top dielectric substrate and connected to the upper floor. The feeder branch is printed on the top surface of the bottom dielectric substrate and connected to the rod-shaped stripline. This antenna can achieve second harmonic suppression without increasing the antenna volume and without affecting in-band matching.

To provide an inter-story structure by a framework wall construction method, capable of reducing noise due to vibration on an upper floor to reduce noise from the upper floor to lower floors.SOLUTION: An inter-story structure comprises: an underfloor frame body 2 arranged on a lower floor wall panel 1 and assembled with floor joist material; floor plywood 3 laid on the top surface of the underfloor frame body 2; an upper floor wall panel 4 arranged on the floor plywood 3 above the lower floor wall panel 1; a three-dimensional net-like structure body 5 laid on the top surface of the floor plywood 3; and a floor substrate material 6 laid on the three-dimensional net-like structure body 5, wherein the upper floor wall panel 4 has a lower frame 4a, which has, on its bottom surface, a groove-like ventiduct 4b extending in a width direction of the lower frame 4a to communicate with the three-dimensional net-like structure body 5.SELECTED DRAWING: Figure 1

To provide means by which an opening can be closed (buried) after being constructed in a concrete floor of an upper floor, eliminating the need for formwork support work for a floor bottom formwork or joint work between upper and lower floors, and reducing the labor required for assembling and dismantling the formwork and the generation of residual materials.SOLUTION: An opening 2 has an upper draft surface 3a having an inward draft slope downward from an entire upper end periphery 2a, and a lower steep slope surface 3b below the upper draft surface, which is a surface that is steeper inward than the draft slope. An open formwork 10 has an upper outer peripheral surface 12 that abuts against the upper draft surface, and a lower outer peripheral surface 14 that abuts against the lower steep slope surface. A closing member 20 has a plate-shaped portion 22 that fits into the inner lower end of the opening, and an inclined lower surface 22a that abuts against the lower steep slope surface on both lower ends in the width direction or length direction. The opening construction and burying method is a method in which the opening 2 is constructed in a concrete floor 1, and then the opening 2 is closed and buried, and includes an opening construction step S1, a form removal step S2, a material lifting step S3, and an opening burying step S4, in this order.SELECTED DRAWING: Figure 4

The utility model provides a partition wall impact test system which comprises an upper floor and a lower floor which are used for fixing a partition wall test piece, and the partition wall test piece is fixed between the upper floor and the lower floor; the impact assembly is positioned on one side of the partition wall test piece, is arranged on the upper floor slab and is used for impacting the partition wall test piece; the plurality of displacement sensors are arranged on one side, far away from the impact assembly, of the partition wall test piece at intervals; the camera is positioned on one side of the partition wall test piece and is arranged on the lower floor slab; and the intelligent terminal is respectively connected with the displacement sensor and the camera. According to the utility model, real-time data acquisition in the impact process can be realized, the acquired data is comprehensive, high in precision and strong in real-time performance, the detection efficiency and accuracy are improved, and the system is suitable for impact resistance evaluation of large-scale fabricated building structures.

This invention discloses a vehicle storage and retrieval method for a lateral multi-level parking garage, including a lower-level storage and retrieval step and an upper-level retrieval step: When storing a vehicle on the lower level, the lateral multi-level parking garage moves away from the ground-level parking space, lifts the vehicle upwards off the ground, moves it laterally to the ground-level parking space, and then lowers the vehicle to place it in the parking space; when storing a vehicle on the upper level, the lateral multi-level parking garage moves away from the ground-level parking space, lifts the vehicle to the top, and then moves it laterally to the ground-level parking space; when retrieving a vehicle from the lower level, the lateral multi-level parking garage lifts the vehicle upwards off the ground, completely moves it away from the ground-level parking space, places the vehicle on the ground, and then returns it to the ground-level parking space; when retrieving a vehicle from the upper level, the lateral multi-level parking garage moves it laterally and completely moves it away from the ground-level parking space, lifts it up and lowers it to place it on the ground, and then returns it to the ground-level parking space. This invention controls and retrieves vehicles in a lateral double-level parking garage, is simple and convenient to operate, can meet the requirements for temporary parking in public places, and effectively solves the problem of urban parking difficulties.

To provide a floor structure of a building in which floor beams of an upper floor are exposed to the ceiling of a lower floor, the floor height is restricted while an electric wiring path is secured, and the ceiling height of the lower floor can be set high. [Solution] The system has a flooring layer comprising a plurality of beams arranged in parallel at a predetermined interval, a first flooring layer laid in contact with the upper surfaces of the plurality of beams, and a second flooring layer laid in contact with the upper surface of the first flooring layer, and the flooring layer has a columnar space partitioned by the first flooring layer and the second flooring layer, which penetrates the first flooring layer from top to bottom, at a position including directly above at least one of the plurality of beams.

The present invention aims to provide a joint. [Solution] The joint of the present invention is a joint installed in a through-hole provided in the floor slab of a building, and comprises a manifold having a vertical pipe connection part connected to a vertical pipe extending from an upper floor and a horizontal pipe connection part connected to a horizontal pipe, a lower connection part connected to a vertical pipe extending from a lower floor, and an intermediate part connecting the manifold part and the lower connection part and having an inner diameter larger than that of the vertical pipe, wherein at least the intermediate part is embedded in the through-hole of the floor slab, and either the manifold part, the intermediate part, or the lower connection part is made of resin, and a first swivel member is provided inside either the manifold part or the intermediate part, and a second swivel member is provided inside the lower connection part.

The present invention provides a prefabricated building structure, a building assembled with the prefabricated building structure, and its method for assembly. In one embodiment, said prefabricated building structure comprises: a) an upper floor slab, including at least one column, with each of the said at least one column comprises a movable connection end and a free end; b) a lower floor slab, including at least one column slot, with each of the said at least one column slot positioned to correspond to the movable connection end; c) a spacing slab, including a set of guide rails; wherein the spacing slab is positioned between the lower floor slab and the upper floor slab; said at least one column is initially in a horizontal position and adopts an upright position when the free end is guided by the guide rails into a corresponding column slot after the upper floor slab is raised.

The invention discloses a floor brush structure capable of adjusting the hinging tightness of a connecting pipe according to the moving condition, and the floor brush structure comprises a floor brush lower shell which is provided with a dust collection hole, a dust collection pipe is connected to the dust collection hole, and a hose is connected between the dust collection pipe and a handle pipe; the two sides of the handle pipe are hinged to the floor brush lower shell, the tensioning piece is installed on the inner wall of the floor brush lower shell, and the tensioning piece is used for controlling the tightness of the rotating angle of the handle pipe; and the floor brush upper shell is detachably connected to the floor brush lower shell. The tensioning part is arranged in the lower shell of the floor brush, the two sides of the handle pipe are connected to the lower shell of the floor brush through the hinge shafts, the tensioning part is connected to the hinge shafts, the tensioning degree can be adjusted in the rotating process of the handle pipe according to the moving condition of the floor brush, and when the floor brush is slowly perpendicular and a hose connected with the handle pipe is bent too much, the tensioning degree can be adjusted. The larger the tensile force is, the damage caused by excessive bending of the hose is avoided, and the cleaning effect is improved.

This will suppress cracking and reduce costs. [Solution] A floor structure having a lower floor slab and an upper floor slab provided on the lower floor slab, wherein the lower floor slab is made of unreinforced concrete or reinforced concrete using first concrete, and the upper floor slab is made of reinforced concrete using second concrete, and the shrinkage strain of the second concrete is smaller than the shrinkage strain of the first concrete.