CN213382193U

CN213382193U - Precast concrete bank platform

Info

Publication number: CN213382193U
Application number: CN202022168591.7U
Authority: CN
Inventors: 陈增顺; 安伟利; 刘娜博; 张冰谨; 杨宏武; 邢荣华; 苌孟芝
Original assignee: Hebeisijian Construction Engineering Co ltd
Current assignee: Hebeisijian Construction Engineering Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-06-08
Anticipated expiration: 2030-09-28

Abstract

The utility model provides a precast concrete bank platform, precast concrete bank platform include linear type bank platform piece and corner type bank platform piece, the bottom surface of bank platform piece is echelonment or recess form, is equipped with the U-shaped reinforcing bar in the bottom of bank platform piece, two tip pre-buried in the bank platform piece of U-shaped reinforcing bar, the flexion salient of U-shaped reinforcing bar in the bottom surface of bank platform piece, the U-shaped reinforcing bar is used for as rings when bank platform piece transports to be connected as the supporting legs at bank platform piece and floor. The utility model discloses combine together precast concrete bank platform and slip casting construction, bank platform piece bottom surface design has increased the infiltration route for special echelonment or recess form simultaneously, through practice the proof, the utility model discloses water-proof effects is fine, and adopts the slip casting method to bond precast concrete bank platform and concrete floor more closely, and bank bench top edges and corners are clear.

Description

Precast concrete bank platform

Technical Field

The utility model belongs to the technical field of bathroom, kitchen precast concrete bank platform construction technology and specifically relates to a precast concrete bank platform is related to.

Background

The concrete sill deck construction generally adopts secondary structure construction, and the concrete is cast simultaneously in the main concrete cast-in-place beam slab construction process, and secondary formwork pouring concrete is required. The method has the advantages of reducing the formwork supporting difficulty, having high construction speed, reducing the construction difficulty especially under the condition that the concrete strength of the ridge platform is inconsistent with the strength of the floor slab, and reducing the cost. The construction joint exists between the ridge platform and the floor slab, the interface treatment is not in place in the pouring process, the root of the return edge of the side opening (including the roof parapet) of the toilet, the kitchen and the roof is easy to leak or get damp in the later use process, and the later maintenance and repair of the project are greatly influenced. The method can be applied to cast-in-place structures and can also be applied to fabricated buildings.

The construction method commonly used at present also comprises the following steps: the concrete sill table and the main body beam slab are synchronously poured, the concrete sill table formwork is erected in a mode of hanging the formwork, and the concrete strength grade of the sill table is the same as that of the floor slab. The construction method has the advantages that the integrity of the cutting platform and the floor slab is improved, and the conditions of construction joints and water leakage at the construction joints do not exist. The method has the advantages that the construction difficulty is high by adopting the hanging die, the construction progress is slow, the requirement on the operation technical level of an operator is high, the positioning accuracy of the template is not well controlled, the stability of the hanging die template is difficult to control, the conditions of die expansion and die running are easy to occur in the concrete pouring process, because the height difference exists in the poured concrete, the concrete sill table part cannot be vibrated in the concrete pouring process, once the vibrated concrete collapses to the periphery, the control of the elevation of the floor slab is influenced, the elevation of the top of the floor slab near the sill table is increased, the condition of under-vibration exists in the sill table pouring process, the condition of leakage is easy to occur due to the fact that the concrete is not vibrated compactly, and the distribution of the leakage points is not well processed irregularly. The strength grade of the concrete sill platform can only be consistent with that of a floor slab, and if the strength grade is not consistent with that of the floor slab, the cost is increased. The above method is only applicable to cast-in-place structural construction.

At present, a method for prefabricating the concrete sill table also exists in the concrete sill table construction method, and the method is characterized in that the concrete sill table is prefabricated in sections according to the size, the reinforcing bars and the concrete strength grade required in a design construction drawing, then the concrete sill table is hoisted to be in place to a corresponding position before concrete is poured on a floor slab, then the floor slab concrete is poured, and the floor slab concrete is poured into a whole. And the positions of the construction joints of the prefabricated sill section are bonded by concrete pouring.

The method has the advantages that the horizontal construction joint at the position of the prefabricated sill and the floor slab has stronger impermeability and lower leakage rate than the horizontal construction joint of the first secondary structure construction method; the compactness of concrete of the sill table body is stronger by adopting a prefabricating method for industrially manufacturing the sill table, the leakage condition caused by the incompact concrete is reduced, the prefabricating method omits a mould hanging construction step, the construction difficulty is reduced, the construction progress is accelerated, and the sill table positioning is easier to operate. The method has the disadvantages that a plurality of longitudinal construction joints are added for the sectional installation of the prefabricated part, leakage points are increased, and once the construction joints are not well treated, the leakage is easy to occur, so that the integrity of the method is weaker than that of the former two methods. In addition, concrete pouring bonding is adopted to enable the compactness of the construction joint to be poor, the possibility of leakage is increased, and the subsection prefabricated sill table is generally linear, so that the difficulty in treating the construction joint at the corner of the sill table is high, and the leakage is easy to occur. In conclusion, how to deal with the leakage condition of each construction joint when the prefabricated sill construction is carried out is an urgent problem to be solved, and the construction quality is ensured.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a precast concrete bank platform to solve the easy seepage of current bank platform construction joint department, the comparatively complicated problem of work progress.

The utility model adopts the technical proposal that: a precast concrete sill table comprises a linear sill table block and a corner sill table block, wherein the bottom surface of the sill table block is in a step shape or a groove shape, a U-shaped steel bar is arranged at the bottom of the sill table block, two end parts of the U-shaped steel bar are embedded in the sill table block, the bending part of the U-shaped steel bar protrudes out of the bottom surface of the sill table block, and the U-shaped steel bar is used as a lifting ring during transportation of the sill table block and used as a supporting leg during connection of the sill table block and a floor slab; the height of the sill block is 120-170 mm. The length of linear type sill block is 1000 ~ 1200mm, and the both sides length of corner type sill block is 500~600 mm.

The height of the bent part of the U-shaped steel bar protruding out of the lowest bottom surface of the sill block is 30 mm.

The width of the notch of the groove-shaped bottom surface of the ridge block is 30mm, and the depth of the notch is 30 mm.

Every bank platform piece sets up two U-shaped reinforcing bars at least, and two U-shaped reinforcing bars symmetry are located apart from bank platform piece tip 250mm department.

The bending part of the U-shaped steel bar is a horizontal hook.

The utility model has the advantages of it is following:

(1) adopt precast concrete bank platform batch production processing, the management is standard, operation standardization, flow, and the technical merit of construction is high, and the quality assurance degree is high, and prefabricated component's high quality, pre-buried U-shaped reinforcing bar can be as rings when bank platform piece transports, as the supporting legs when bank platform piece is connected with the floor, and it is more convenient to use.

(2) The bottom surface of the precast concrete sill table (namely the position of a horizontal seam connected with a floor slab) is made into a groove shape or a step shape, so that the permeation path is increased, the impermeability is improved, the service function is more reliable, the maintenance caused by the water seepage of the horizontal seam of the sill table is reduced, and the service life of the project is prolonged.

(3) When the concrete bank platform is prefabricated, the direct prefabrication of corner is corner type bank platform piece, and when having avoided the construction of linear type bank platform piece, the template was erect the degree of difficulty and is big, and the problem that corner slip casting quality is difficult to guarantee has significantly reduced the whole condition of seeping water of bank platform.

(4) The hot-rolled channel steel is adopted as a grouting template, the surface of the profile steel is flat, smooth and not easy to be stained with slurry, and the impression effect after the template is removed is good; the section steel rigidity intensity is big, and non-deformable can increase and consolidate the interval to the screw rod of drawing, saves the manual work under the prerequisite of guaranteeing the quality, connects the reinforcement of inboard template and becomes whole, makes the template stable not shift indeformable. And the section steel template can be used repeatedly, so that the cost is saved.

(5) Compared with the existing concrete pouring mode, the grouting material is adopted for grouting, the grouting material has high strength, high compactness and no shrinkage, and the tightness and impermeability of construction joints can be ensured; the grouting material has strong fluidity and simple grouting process, can flow and fill horizontal construction joints and longitudinal joints by adopting gravity grouting, has no honeycomb pitted surface and has high speed. The grouting material strength is increased quickly, the template dismantling time is shortened, and the template turnover rate is improved.

To sum up, the utility model discloses combine together precast concrete bank platform and slip casting construction, bank platform piece bottom surface design has increased the infiltration route for special echelonment or recess form simultaneously, through practice the proof, the utility model discloses water-proof effects is fine, and adopts the slip casting method to bond precast concrete bank platform and concrete floor more closely, and bank bench top edges and corners is clear. The utility model discloses construction method progress is fast, easy operation, construction quality is guaranteed.

Drawings

Fig. 1 is a schematic structural view of the precast concrete sill table of the present invention.

Fig. 2 is a schematic view of the sectional structure of the precast concrete sill table combined with the formwork assembly of the present invention.

Fig. 3 is a side view of fig. 2.

Fig. 4 is a schematic plan view of the sill plate assembly of the present invention.

Wherein, 1, a linear type ridge platform block; 2. a corner type sill block; 3. a groove; 4. u-shaped steel bars; 5. horizontally sewing the template; 6. longitudinal seam formworks; 7. oppositely pulling the screw rod; 8. a type 3 fastener; 9. erecting a pipe; 10. a floor slab; 11. a rubber pad; 12. a nut; 13. horizontally sewing; 14. and (6) longitudinal sewing.

Detailed Description

As shown in fig. 1 to 4, the precast concrete sill table (fig. 1) of the present invention includes 4 linear

sill table blocks

1 and 4 corner sill table blocks 2, the height of the sill table block is 140mm, and the width is the same as the width of the wall. The length of the linear type sill block 1 is 1000mm, and the length of both sides of the corner type sill block 2 is 500 mm. The bottom surface of the sill block is in a groove shape, the width of a notch of the bottom surface groove 3 is 30mm, and the depth of the notch is 30 mm. The bottom of the bank platform block is provided with a U-shaped steel bar 4, two end parts of the U-shaped steel bar 4 are embedded in the bank platform block, the bending part of the U-shaped steel bar 4 protrudes out of the bottom surface of the bank platform block, and the height of the protruding out of the lowest bottom surface of the bank platform block is 30 mm. Every bank platform piece sets up two U-shaped reinforcing bars 4 at least, and two U-shaped reinforcing bars 4 symmetry are located apart from bank platform piece tip 250mm department. The U-shaped steel bar 4 is used as a hanging ring when the sill block is transported, and is used as a supporting leg when the sill block is connected with a floor slab; in order to ensure the stable support, the bent part of the U-shaped steel bar 4 is a horizontal hook.

The construction method of the precast concrete sill platform comprises the following steps:

a. according to the needs of wading rooms such as toilets, kitchens and the like, the length of the part of the upturning sill table, the position of the door opening, the width of the longitudinal seam of the prefabricated sill table and the like are designed, then the prefabricated sill table is segmented, and the prefabricated sill table can be manufactured on site or in a special prefabricated concrete member processing factory. Designing a sill template assembly according to the segmented sill, and calculating the rigidity strength and the reinforcement measure of the template; the subsection and size division of the prefabricated sill table comprehensively consider various sizes of wading rooms of the whole project, specification types are reduced as far as possible, so that the reuse rate and turnover rate of various templates are improved, the subsection of the sill table cannot be too large, the hoisting difficulty is increased, too many longitudinal seams cannot be caused due to too short length, and management and construction are facilitated.

Sill template subassembly include horizontal seam template 5, longitudinal joint template 6, split

screw

7, 3 type fastener 8 and frame pipe 9, horizontal seam template 5 and longitudinal joint template 6 are the channel-section steel structure, horizontal seam template 5 is including the straight template that corresponds linear type sill piece 1 and the angle template that corresponds corner type sill piece 2.

b. And positioning and paying off are carried out according to the mounting position of the ridge platform, two side lines of the ridge platform and positioning lines at two ends of the ridge platform are required to be paid out, and the floor 10 at the mounting position is cleaned and chiseled into a rough surface.

c. One surface of each sill block with the U-shaped steel bar 4 faces downwards and is supported on the floor slab 10, the U-shaped steel bar 4 plays a supporting role at the moment, and all sill blocks are placed in position according to the design positions of the sill blocks; 20 mm-30 mm of grouting seam longitudinal seams are reserved between the sill blocks, and the horizontal seams between the sill blocks and the floor slab are 30 mm; care should be taken that the seating is accurate.

d. Installing horizontal seam templates 5 on two sides of the ridge table, integrally installing the inner side horizontal seam templates to corresponding positions, then installing the outer side templates, connecting the bottom surfaces of the horizontal seam templates with a floor slab by using rubber mats 11, arranging bolt holes in the positions, corresponding to longitudinal seams of the ridge table, of the horizontal seam templates 5, penetrating counter-pull screws 7 into the bolt holes, sequentially penetrating the end parts, penetrating out of the horizontal seam templates on the two sides of the ridge table, of the counter-pull screws 7 through 3-type fasteners 8 and nuts 12, and pressing frame pipes 9 between the 3-type fasteners 8 and the horizontal seam templates 5; the split screw 7 comprises a middle rod and end rods screwed at two ends of the middle rod, the length of the middle rod is equal to or slightly less than the width of the ridge platform, and the middle rod is reserved in the ridge platform after the ridge platform is constructed.

The prefabricated concrete ridge platform is arranged between the inner side template and the outer side template and used for supporting, the width of a grouting seam can be ensured, the corner of the inner side template is not easy to deform due to the inclined strut, the four sides of the inner side template are mutually restricted and cannot move, the outer side template and the inner side template are fixedly connected through the counter-pulling screw rod, the position of the template is ensured to be accurate, the corner template is fastened through the frame pipe at the external corner of a wading room, and the corner of the template is ensured not to leak grout.

e. And a longitudinal seam template 6 is arranged at the position corresponding to the longitudinal seam of the ridge platform, the longitudinal seam template 6 is a channel steel with the width larger than that of the longitudinal seam, and the bottom surface of the longitudinal seam template is welded with the top surface of the horizontal seam template 5.

f. Grouting the horizontal seam and the longitudinal seam of the ridge platform by using a grouting pipe; the grouting pipe is a hose with the diameter smaller than that of the horizontal seam, the length of the grouting pipe is about the length of the operation length, the height of the longitudinal seam, the height of the outcrop and the length of the horizontal section (the length of the horizontal section is generally the length of the prefabricated sill table), the grouting pipe is placed in the horizontal seam at the lower part of the prefabricated sill table in advance, and the grouting pipe is exposed out of the longitudinal seam. Before grouting, a grouting pipe needs to be wetted, and grouting and drawing are carried out during grouting so as to ensure the grouting fullness;

CGM grouting material is selected, and the grouting material has good fluidity, high strength and no shrinkage. The grouting adopts a gravity grouting method. Preparation is carried out before CGM grouting material construction: the mechanical stirring adopts a concrete mixer or a mortar mixer; a plurality of stirring tanks and iron shovels are adopted for manual stirring; the end part of the grouting pipe is connected with a grouting funnel, grouting materials are poured into the funnel, a horizontal seam is reserved through the grouting pipe, the horizontal seam enters the longitudinal seam under the action of pressure after being fully grouted until the longitudinal seam is fully grouted, and grouting begins to be performed at one time from one end of the ridge platform.

And (4) maintaining after grouting is finished, and immediately covering a wet grass cover or a rock wool quilt within 30 minutes after grouting is finished, and keeping the wet grass cover or the rock wool quilt. And dismantling the sill formwork assembly after the sill maintenance meets the requirement.

Practice proves, uses the utility model discloses has following effect:

(1) the concrete sill table is accurately positioned;

(2) the concrete compactness of the concrete sill table is high, and the impermeability is good;

(3) the integrity of the concrete sill table is good;

(4) the concrete ridge platform is regular in shape and good in appearance impression;

(5) the method has the advantages of quick construction, good effect, construction period saving and cost saving;

(6) the utility model is a construction method more suitable for an assembly structure, and has more outstanding advantages in the assembly structure;

(7) the method is also suitable for the construction of the wading room upper turning ridge platform of the light steel structure building.

Claims

1. A precast concrete sill is characterized by comprising a linear sill block and a corner sill block, wherein the bottom surface of the sill block is in a step shape or a groove shape, a U-shaped steel bar is arranged at the bottom of the sill block, two end parts of the U-shaped steel bar are embedded in the sill block, the bending part of the U-shaped steel bar protrudes out of the bottom surface of the sill block, and the U-shaped steel bar is used as a hanging ring during transportation of the sill block and is used as a supporting leg during connection of the sill block and a floor slab; the height of the ridge table block is 120-170 mm; the length of linear type sill block is 1000 ~ 1200mm, and the both sides length of corner type sill block is 500~600 mm.

2. The precast concrete sill table of claim 1, wherein the bent portion of the U-shaped reinforcing bar protrudes from the lowest bottom surface of the sill block by a height of 30 mm.

3. The precast concrete sill according to claim 1, characterized in that the width of the notch of the groove-like bottom surface of the sill block is 30mm and the depth of the notch is 30 mm.

4. The precast concrete sill table of claim 1, wherein each sill block is provided with at least two U-shaped reinforcing bars, and the two U-shaped reinforcing bars are symmetrically arranged at a distance of 250mm from the end of the sill block.

5. The precast concrete sill of claim 1, wherein the bend of the U-shaped reinforcing bar is a horizontal hook.