CN114109038A - Wall construction process of treatment-free opposite-pulling screw PVC sleeve - Google Patents
Wall construction process of treatment-free opposite-pulling screw PVC sleeve Download PDFInfo
- Publication number
- CN114109038A CN114109038A CN202111342295.7A CN202111342295A CN114109038A CN 114109038 A CN114109038 A CN 114109038A CN 202111342295 A CN202111342295 A CN 202111342295A CN 114109038 A CN114109038 A CN 114109038A
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- template
- sleeve
- concrete
- screw
- pvc
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- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 25
- 239000004033 plastic Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 4
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 19
- 239000000654 additive Substances 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000000979 retarding effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 description 3
- 239000004035 construction material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
- E04G17/0657—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts fully recoverable
Abstract
Calculating the distance between the screws, then building a template, reserving a plastic sleeve on the template according to the distance between the screws, uniformly coating a release agent inside and outside the plastic sleeve, installing a PVC sleeve, wherein the length of the PVC sleeve is smaller than the width of the template, two ends of the PVC sleeve are supported on the inner side of the template through rubber sleeve heads, and the plastic sleeve extends into the rubber sleeve heads and is sleeved on the PVC sleeve; uniformly coating a release agent on the opposite-pulling screw rod, then inserting a PVC sleeve, completing the installation of the opposite-pulling screw rod, and pouring a wall body; and (3) removing the template, the counter-pull screw rod, the plastic sleeve and the rubber sleeve head at the later stage of concrete solidification, and sealing the hole left by the rubber sleeve head by using mortar. By adopting the invention, the problem caused by too long extension of the PVC sleeve is avoided, the construction period is saved, and the material is saved; rubber sleeve heads are additionally arranged at two ends of the PVC sleeve to be supported on the inner side of the template, reserved holes are enlarged, later filling is facilitated, and the apparent mass of the shear wall is improved; the split screw and the plastic sleeve can be repeatedly used.
Description
Technical Field
The invention relates to the technical field of shear wall construction; in particular to a construction process of a wall body of a treatment-free opposite-pull screw PVC sleeve.
Background
And (3) carrying out template support before the shear wall is poured, and isolating the counter-pulling screw rods by adopting PVC sleeves during template support so that the counter-pulling screw rods can be taken out for reuse. In actual engineering projects, the length of the PVC sleeve often exceeds that of a concrete wall surface, so that secondary processing is needed, and the cost is increased. In addition, the distance and the number of the split screws are often selected through experience, disposable PVC sleeves are uneven after the die is removed, and the apparent mass of the junction of the PVC sleeves and concrete is poor, so that the construction period is prolonged and materials are wasted.
Disclosure of Invention
In order to solve the technical problems, the invention provides a process for constructing a wall body by using a PVC sleeve pipe of a treatment-free opposite-pulling screw rod.
The invention is realized by the following technical scheme.
The invention provides a treatment-free wall construction process for a PVC casing pipe with split screws, which comprises the following steps:
calculating the distance between the screws, then building a template, reserving a plastic sleeve on the template according to the distance between the screws, uniformly coating a release agent inside and outside the plastic sleeve, installing a PVC sleeve, wherein the length of the PVC sleeve is smaller than the width of the template, two ends of the PVC sleeve are supported on the inner side of the template through rubber sleeve heads, and the plastic sleeve extends into the rubber sleeve heads and is sleeved on the PVC sleeve; uniformly coating a release agent on the opposite-pulling screw rod, then inserting a PVC sleeve, completing the installation of the opposite-pulling screw rod, and pouring a wall body; and (3) removing the template, the counter-pull screw rod, the plastic sleeve and the rubber sleeve head at the later stage of concrete solidification, and sealing the hole left by the rubber sleeve head by using mortar.
The rubber sleeve head is conical. The reserved holes are enlarged, and later filling is facilitated.
And one end of the rubber sleeve head, which is close to the template, is provided with an outward flanging structure.
The outward flanging structure is connected with the template through screws.
The calculating the screw pitch comprises: carrying out load effect combination on various loads, and calculating an effect load G on a unit wall area; by the formula: G/A is less than or equal to [ sigma ], wherein [ sigma ] is the allowable stress of the screw, and A is the average sectional area A of the counter-pulling screw on the unit wall area; and calculating the minimum sectional area A just meeting the effect load G, and finally calculating the number of the screws according to the specification of the screws to obtain the maximum distance between the screws.
The effect load G includes: firstly, a standard load value generated when the concrete is vibrated is 3kN/m 2-4 kN/m 2;
pressure of newly cast concrete to the side of the template; when the internal vibrator is adopted, the lateral pressure of the newly cast concrete to the template is calculated according to the following formulas (i) and (ii), and a smaller value is taken:
F＝0.22·γc·toβ1·β2·υ·0.5(①)；
F＝γc·H(②)；
f is the side pressure of newly poured concrete;
yc-concrete gravity;
to-initial setting time of newly cast concrete; determining from the actual measurement time, and calculating by adopting a formula to 200(T +15) (T is the concrete temperature) when the information is lacked;
beta 1-the additive influences the correction coefficient, the value is 1.0 when the additive is not added, and the value is 1.2 when the additive with the retarding function is added;
beta 2-a concrete slump influence correction coefficient, and when the slump is less than 30mm, taking 0.85; taking 1.0 when the slump is 50-90 mm; taking 1.15 when the slump is 110-150 mm;
upsilon-concrete pouring speed;
h, calculating the height from the lateral pressure of the concrete to the top surface of the newly cast concrete;
third, the load generated when the concrete is poured: and taking the standard value of the horizontal load generated by the side die when the guide pipe is adopted for pouring as 2kN/m 2.
In the calculation process of the effect load G, a subentry coefficient of 1.4 is taken for a load standard value generated when the concrete is vibrated, a subentry coefficient of 1.2 is taken for the pressure of the newly poured concrete on the side surface of the template, and a subentry coefficient of 1.4 is taken for the load generated when the concrete is poured; the effect load G is calculated by weighting.
The invention has the beneficial effects that:
the length of the PVC sleeve is controlled, the problem caused by too long PVC sleeve extending is avoided, the post-treatment of the PVC sleeve by using an angle grinder is avoided, the construction period is shortened, and materials are saved; rubber sleeve heads are additionally arranged at two ends of the PVC sleeve to be supported on the inner side of the template, reserved holes are enlarged, later filling is facilitated, and the apparent mass of the shear wall is improved; the split screw and the plastic sleeve can be repeatedly used, the consumption and waste of construction materials are reduced, and the requirement of green construction is met. On the premise of ensuring the safety of the structure, the optimal screw spacing is obtained, and the method is suitable for popularization and practical application.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-template; 2-oppositely pulling the screw rod; 3-PVC sleeves; 4-rubber sleeve head; 5-plastic sleeve; 6-outward flanging structure.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The invention provides a wall construction process of a treatment-free split screw 2PVC sleeve 3, which comprises the following steps:
calculating the screw pitch, then building a template 1, reserving a plastic sleeve 5 on the template 1 according to the screw pitch, uniformly coating a release agent inside and outside the plastic sleeve 5, installing a PVC sleeve 3, wherein the length of the PVC sleeve 3 is smaller than the width of the template 1, two ends of the PVC sleeve 3 are supported on the inner side of the template 1 through a rubber sleeve head 4, and the plastic sleeve 5 extends into the rubber sleeve head 4 and is sleeved on the PVC sleeve 3; uniformly coating a release agent on the opposite-pulling screw rod 2, then inserting the PVC sleeve 3, completing the installation of the opposite-pulling screw rod 2, and pouring a wall body; and (3) removing the template 1, the counter-pull screw rod 2, the plastic sleeve 5 and the rubber sleeve head 4 at the later stage of concrete solidification, and sealing the hole left by the rubber sleeve head 4 by using mortar.
By adopting the invention, the length of the PVC sleeve 3 is controlled, the problem caused by the overlong extension of the PVC sleeve 3 is avoided, the later-stage treatment of the PVC sleeve 3 by using an angle grinder is avoided, the construction period is saved, and the material is saved; rubber sleeve heads 4 are additionally arranged at two ends of the PVC sleeve 3 and supported on the inner side of the template 1, reserved holes are enlarged, later filling is facilitated, and the apparent mass of the shear wall is improved; the split screw 2 and the plastic sleeve 5 can be repeatedly used, so that the consumption and waste of construction materials are reduced, and the requirement of green construction is met.
The rubber sleeve head 4 is conical. The reserved holes are enlarged, and later filling is facilitated.
And one end of the rubber sleeve head 4 close to the template 1 is provided with an outward flanging structure 6.
The flanging structure 6 is connected with the template 1 through screws.
The rubber sleeve head 4 is stably connected with the template 1, the sealing performance is good, and the plastic sleeve 5 can be conveniently taken out in a later period without damage.
The calculating the screw pitch comprises: carrying out load effect combination on various loads, and calculating an effect load G on a unit wall area; by the formula: G/A is less than or equal to [ sigma ], wherein [ sigma ] is the allowable stress of the screw, and A is the average sectional area A of the counter-pulling screw 2 on the unit wall area; and calculating the minimum sectional area A just meeting the effect load G, and finally calculating the number of the screws according to the specification of the screws to obtain the maximum distance between the screws. The maximum distance is obtained, the installation of split bolts can be reduced as far as possible, the use of sleeves and the later-stage wall surface treatment are reduced, and the production cost and the construction period are saved.
The effect load G includes: firstly, a standard load value generated when the concrete is vibrated is 3kN/m 2-4 kN/m 2;
pressure of newly poured concrete on the side surface of the template 1; when the internal vibrator is adopted, the lateral pressure of the newly cast concrete to the template 1 is calculated according to the following formulas (i) and (ii), and a smaller value is taken:
F＝0.22·γc·toβ1·β2·υ·0.5(①)；
F＝γc·H(②)；
f is the side pressure of newly poured concrete;
yc-concrete gravity;
to-initial setting time of newly cast concrete; determining from the actual measurement time, and calculating by adopting a formula to 200(T +15) (T is the concrete temperature) when the information is lacked;
beta 1-the additive influences the correction coefficient, the value is 1.0 when the additive is not added, and the value is 1.2 when the additive with the retarding function is added;
beta 2-a concrete slump influence correction coefficient, and when the slump is less than 30mm, taking 0.85; taking 1.0 when the slump is 50-90 mm; taking 1.15 when the slump is 110-150 mm;
upsilon-concrete pouring speed;
h, calculating the height from the lateral pressure of the concrete to the top surface of the newly cast concrete;
third, the load generated when the concrete is poured: and taking the standard value of the horizontal load generated by the side die when the guide pipe is adopted for pouring as 2kN/m 2.
kN/m 2: kilonewtons per square meter. The spacing and the number of the pull screws are usually selected through experience, and in order to ensure the structure safety, large deviation exists, a large number of uneven PVC sleeves 3 are left after the form removal, and the problems of large workload, prolonged construction period and material waste are caused. The method is adopted to determine the effect load G, has accurate numerical value and is suitable for popularization and practical application.
In the calculation process of the effect load G, a subentry coefficient of 1.4 is taken for a load standard value generated when the concrete is vibrated, a subentry coefficient of 1.2 is taken for the pressure of the newly poured concrete on the side surface of the template 1, and a subentry coefficient of 1.4 is taken for the load generated when the concrete is poured; the effect load G is calculated by weighting. On the premise of ensuring the safety of the structure, the optimal screw spacing is obtained, and the method is suitable for popularization and practical application.
Claims (7)
1. The utility model provides a exempt from to handle wall body construction technology of split screw PVC sleeve pipe which characterized in that: the method comprises the following steps:
calculating the screw spacing, then building a template (1), reserving a plastic sleeve (5) on the template (1) according to the screw spacing, uniformly coating a release agent inside and outside the plastic sleeve (5), installing a PVC sleeve (3), wherein the length of the PVC sleeve (3) is smaller than the width of the template (1), two ends of the PVC sleeve (3) are supported on the inner side of the template (1) through a rubber sleeve head (4), and the plastic sleeve (5) extends into the rubber sleeve head (4) and is sleeved on the PVC sleeve (3); uniformly coating a release agent on the opposite-pulling screw rod (2), then inserting the PVC sleeve (3), completing the installation of the opposite-pulling screw rod (2), and pouring a wall body; and (3) removing the template (1), the counter-pull screw (2), the plastic sleeve (5) and the rubber sleeve head (4) at the later stage of concrete solidification, and sealing the hole left by the rubber sleeve head (4) by using mortar.
2. The process for constructing the wall body of the treatment-free split-screw PVC sleeve pipe as claimed in claim 1, wherein the process comprises the following steps: the rubber sleeve head (4) is conical.
3. The process for constructing the wall body of the treatment-free split-screw PVC sleeve pipe as claimed in claim 1, wherein the process comprises the following steps: one end of the rubber sleeve head (4) close to the template (1) is provided with an outward flanging structure (6).
4. The process for constructing the wall body of the treatment-free split-screw PVC sleeve pipe as claimed in claim 3, wherein the process comprises the following steps: the flanging structure (6) is connected with the template (1) through screws.
5. The process for constructing the wall body of the treatment-free split-screw PVC sleeve pipe as claimed in claim 1, wherein the process comprises the following steps: the calculating the screw pitch comprises: carrying out load effect combination on various loads, and calculating an effect load G on a unit wall area; by the formula: G/A is less than or equal to [ sigma ], wherein [ sigma ] is the allowable stress of the screw, and A is the average sectional area A of the counter-pulling screw (2) on the unit wall area; and calculating the minimum sectional area A just meeting the effect load G, and finally calculating the number of the screws according to the specification of the screws to obtain the maximum distance between the screws.
6. The process for constructing the wall body of the treatment-free split-screw PVC sleeve pipe as claimed in claim 5, wherein the process comprises the following steps: the effect load G includes: firstly, a standard load value generated when the concrete is vibrated is 3kN/m 2-4 kN/m 2;
pressure of newly poured concrete on the side surface of the template (1); when the internal vibrator is adopted, the side pressure of the newly cast concrete to the template (1) is calculated according to the following formulas (i) and (ii), and a smaller value is taken:
F＝0.22·γc·toβ1·β2·υ·0.5 (①)；
F＝γc·H (②)；
f is the side pressure of newly poured concrete; yc-concrete gravity;
to-initial setting time of newly cast concrete; determining from the actual measurement time, and calculating by adopting a formula to 200(T +15) (T is the concrete temperature) when the information is lacked;
beta 1-the additive influences the correction coefficient, the value is 1.0 when the additive is not added, and the value is 1.2 when the additive with the retarding function is added;
beta 2-a concrete slump influence correction coefficient, and when the slump is less than 30mm, taking 0.85; taking 1.0 when the slump is 50-90 mm; taking 1.15 when the slump is 110-150 mm;
upsilon-concrete pouring speed;
h, calculating the height from the lateral pressure of the concrete to the top surface of the newly cast concrete;
third, the load generated when the concrete is poured: and (2) kN/m2 is taken as a standard value of the horizontal load generated by the side die when the guide pipe is adopted for pouring.
7. The process for constructing the wall body of the treatment-free split-screw PVC sleeve pipe as claimed in claim 6, wherein the process comprises the following steps: in the calculation process of the effect load G, a subentry coefficient of 1.4 is taken for a load standard value generated when the concrete is vibrated, a subentry coefficient of 1.2 is taken for the pressure of the newly poured concrete on the side surface of the template (1), and a subentry coefficient of 1.4 is taken for the load generated when the concrete is poured; the effect load G is calculated by weighting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111342295.7A CN114109038A (en) | 2021-11-12 | 2021-11-12 | Wall construction process of treatment-free opposite-pulling screw PVC sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111342295.7A CN114109038A (en) | 2021-11-12 | 2021-11-12 | Wall construction process of treatment-free opposite-pulling screw PVC sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114109038A true CN114109038A (en) | 2022-03-01 |
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ID=80379053
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111342295.7A Pending CN114109038A (en) | 2021-11-12 | 2021-11-12 | Wall construction process of treatment-free opposite-pulling screw PVC sleeve |
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| CN (1) | CN114109038A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409852A (en) * | 2011-09-30 | 2012-04-11 | 中国二十二冶集团有限公司 | Construction method for wood formwork with bigger circular structure by taking reinforcing steel bar as lateral rear edge |
| CN202969932U (en) * | 2012-11-14 | 2013-06-05 | 中建三局第二建设工程有限责任公司 | High-precision opposite-pulling screw sleeve device |
| CN203640284U (en) * | 2013-08-28 | 2014-06-11 | 南京南化建设有限公司 | Split bolt capable of being repeatedly used |
| CN213927514U (en) * | 2020-10-27 | 2021-08-10 | 丁昭琳 | Plug for two end parts of oppositely-pulling screw rod of building template |
-
2021
- 2021-11-12 CN CN202111342295.7A patent/CN114109038A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409852A (en) * | 2011-09-30 | 2012-04-11 | 中国二十二冶集团有限公司 | Construction method for wood formwork with bigger circular structure by taking reinforcing steel bar as lateral rear edge |
| CN202969932U (en) * | 2012-11-14 | 2013-06-05 | 中建三局第二建设工程有限责任公司 | High-precision opposite-pulling screw sleeve device |
| CN203640284U (en) * | 2013-08-28 | 2014-06-11 | 南京南化建设有限公司 | Split bolt capable of being repeatedly used |
| CN213927514U (en) * | 2020-10-27 | 2021-08-10 | 丁昭琳 | Plug for two end parts of oppositely-pulling screw rod of building template |
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Application publication date: 20220301 |