CN111636687A - Box steel column core-filling concrete pumping jacking mechanism and construction method - Google Patents
Box steel column core-filling concrete pumping jacking mechanism and construction method Download PDFInfo
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- CN111636687A CN111636687A CN202010553661.2A CN202010553661A CN111636687A CN 111636687 A CN111636687 A CN 111636687A CN 202010553661 A CN202010553661 A CN 202010553661A CN 111636687 A CN111636687 A CN 111636687A
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- concrete
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- branch pipe
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- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention provides a pumping and jacking mechanism for core-filling concrete of a box steel column and a construction method, wherein the pumping and jacking mechanism comprises: pouring core concrete to support the steel column; a grouting feed hole is formed in the side wall close to the bottom end of the core-pouring concrete supporting steel column; the grouting feed hole is connected with a feed branch pipe; the feeding branch pipe is connected with a grouting device; and the feeding branch pipe is provided with a backflow preventer. The construction method of the jacking method of the invention is that a feeding branch pipe with a backflow preventer is arranged at the lower end of a steel column and is directly connected with a conveying pipe of a pump truck, concrete is continuously poured into the steel column from bottom to top, and all gaps in the steel column can be completely filled without vibration. And stopping pumping and immediately closing the backflow preventing device when the concrete is jacked to the designed elevation requirement. The construction by the jacking method has the advantages of flexible operation, safety, reliability, reduction of labor intensity, improvement of working efficiency, effective guarantee of construction quality, reduction of construction cost and the like.
Description
Technical Field
The invention relates to the field of core pouring construction of box steel columns in steel structures, in particular to a jacking mechanism and a construction method for pumping concrete through the core pouring of the box steel columns.
Background
In the core concrete pouring construction of the steel structure engineering box type steel column, a conduit pouring method is adopted, namely a steel conduit with a hopper at the upper end is inserted from the upper opening of a rectangular steel column, concrete is poured from the upper end of the steel column, the concrete flows down along the conduit, and the concrete pouring in the steel column is completed while retreating. When the section size of the steel column is smaller, the steel column needs to be vibrated by an outer wall attached vibrator, but in a steel reinforced concrete composite structure, the steel column is wrapped by a concrete structure, the height of the steel column is mostly three layers or more, and when the core is poured once, the method is not feasible.
The method is improved to a manual section-by-section pouring method aiming at the condition that a concrete structure is wrapped outside a steel column, namely, concrete is poured from the upper opening of the steel column and is tightly vibrated by a vibrator, the one-time pouring height of the concrete cannot exceed 1.5m, and a vibrating rod is inserted for vibrating for more than 30s to ensure that the concrete fills the interior of the steel column tightly.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a pumping and jacking mechanism for box steel column core-filling concrete, which comprises: pouring core concrete to support the steel column;
a grouting feed hole is formed in the side wall close to the bottom end of the core-pouring concrete supporting steel column;
the grouting feed hole is connected with a feed branch pipe;
the feeding branch pipe is connected with a grouting device;
and the feeding branch pipe is provided with a backflow preventer.
It is further noted that the feeding branch pipe is connected with the output end of the knife gate valve;
the input end of the knife gate valve is connected with a concrete vehicle-mounted pump through a pumping pipe.
When the knife gate valve is fully opened, the inner pipe diameter of the valve is larger than the 2/3 pipe diameter of the pumping pipe.
Further, the core-grouted concrete support steel column is vertically arranged;
the included angle between the feeding branch pipe and the core-grouted concrete supporting steel column ranges from 40 degrees to 50 degrees.
The invention also provides a pumping and jacking construction method for the core-filling concrete of the box steel column, which comprises the following steps:
connecting the feeding branch pipe with a grouting feeding hole in the side wall of the bottom end of the core-grouted concrete supporting steel column;
connecting the feeding branch pipe to a grouting device through a pumping pipe;
a backflow prevention device is arranged on the feeding branch pipe;
and pumping concrete grouting material by using a pump truck with preset output power as a grouting device.
It is further noted that, in the step of connecting the feeding branch pipe with the grouting feeding hole on the side wall of the bottom end of the core-grouted concrete supporting steel column,
the feeding branch pipe is made of a steel pipe with the same specification and the same material as the pumping pipe;
the end of the feeding branch pipe is cut off obliquely at an angle of 45 degrees;
and (3) obliquely and downwards butting the inclined cutting plane of the feeding branch pipe with the grouting feeding hole of the core-grouting concrete support steel column, and welding and fixing by adopting gas shielded welding.
It is further noted that the method further comprises:
a knife gate valve is arranged between the feeding branch pipe and the pumping pipe.
It is further noted that the method further comprises:
calculating the total mass of concrete in the column core when the steel column is fully filled according to the preset height of the steel column core, the section size of the column core and the mark number of the concrete;
calculating the pressure born by the section of the feeding branch pipe when the steel column core is filled according to the total mass of the concrete and the effective section size of the feeding branch pipe;
selecting a vehicle-mounted pump with corresponding pumping pressure according to the pressure borne by the cross section of the feeding branch pipe;
the maximum concrete pumping pressure of the vehicle-mounted pump is greater than the pressure borne by the section of the feeding branch pipe.
It is further noted that the method further comprises:
stopping pumping grouting material when the core-grouted concrete in the steel column reaches a preset elevation, and closing the knife-type gate valve;
and after the knife gate valve is completely closed, the pumping pipe is detached and cleaned.
According to the technical scheme, the invention has the following advantages:
the construction method of the jacking method of the invention is that a feeding branch pipe with a backflow preventer is arranged at the lower end of a steel column and is directly connected with a conveying pipe of a pump truck, concrete is continuously poured into the steel column from bottom to top, and all gaps in the steel column can be completely filled without vibration. And stopping pumping and immediately closing the backflow preventing device when the concrete is jacked to the designed elevation requirement. The construction by the jacking method has the advantages of flexible operation, safety, reliability, reduction of labor intensity, improvement of working efficiency, effective guarantee of construction quality, reduction of construction cost and the like.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a box-type steel column core-grouting concrete pumping jacking mechanism.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
It will be understood that when a box steel column core concrete pumping jack according to the present invention is referred to as an element or layer being "on" or "connected" or "coupled" to another element or layer, it may be directly on, connected or coupled to the other element or layer, and intermediate elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description in this document. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
As shown in fig. 1, includes: pouring core concrete to support the steel column 1; a grouting feed hole 2 is formed in the side wall close to the bottom end of the core-grouting concrete supporting steel column 1; the grouting feed hole 2 is connected with a feed branch pipe 3; the feeding branch pipe 3 is connected with a grouting device 6; and the feeding branch pipe 3 is provided with a backflow preventer.
In order to control the grouting process conveniently, the feeding branch pipe 3 is connected with the output end of the knife gate valve 4; the input end of the knife gate valve 4 is connected with a concrete vehicle-mounted pump through a pumping pipe 5. Thus, when grouting is needed, the knife gate valve 4 is opened, and then the concrete vehicle-mounted pump is opened to carry out grouting operation. When the knife gate valve 4 is fully opened, the inner pipe diameter of the valve is larger than the 2/3 pipe diameter of the pumping pipe 5.
The core-grouted concrete supporting steel column 1 is vertically arranged; the included angle alpha between the feeding branch pipe 3 and the core-grouted concrete supporting steel column 1 ranges from 40 degrees to 50 degrees. Preferably, the included angle between the feeding branch pipe 3 and the core-grouted concrete supporting steel column 1 is 45 degrees. The grouting material can be well injected into the core-grouted concrete supporting steel column 1 from the feeding branch pipe 3 by selecting 45 degrees, and the grouting material is gradually injected into the core-grouted concrete supporting steel column 1. And the grouting process, the grouting material of the interior of the core concrete support steel column 1 has the minimum acting force on the feeding branch pipe 3, so that the grouting process is more labor-saving. If the angle is too small, the resistance of grouting material injected into the core-filling concrete supporting steel column 1 is increased in the grouting process, because the core-filling concrete supporting steel column is grouted from bottom to top, the grouting material on the upper part presses and holds the lower part, if the resistance is increased in the angle process, the grouting process is affected, and if the downward pressure in the core-filling concrete supporting steel column 1 is too large, the grouting material in the core-filling concrete supporting steel column 1 is pressed back to the feeding branch pipe 3, so that the grouting process cannot be carried out.
The included angle is too large, and the same principle is followed, so a certain grouting angle needs to be controlled.
Based on the box-type steel column core-filling concrete pumping jacking mechanism, the invention also provides a box-type steel column core-filling concrete pumping jacking construction method, which comprises the following steps:
connecting a feeding branch pipe 3 with a grouting feeding hole 2 on the side wall of the bottom end of the core-grouted concrete supporting steel column 1;
the feeding branch pipe 3 is made of a steel pipe with the same specification, model and material as the pumping pipe 5;
the end of the feeding branch pipe 3 is cut off obliquely at an angle of 45 degrees;
and (3) obliquely and downwards butting the inclined cutting plane of the feeding branch pipe 3 with the grouting feeding hole 2 of the core-grouted concrete supporting steel column 1, and welding and fixing by adopting gas shielded welding.
Connecting the feeding branch pipe 3 to a grouting device 6 through a pumping pipe 5;
a backflow prevention device is arranged on the feeding branch pipe 3;
and a pump truck with preset output power is selected as the grouting device 6 for pumping concrete grouting material.
Stopping pumping grouting material when the core-grouted concrete in the steel column reaches a preset elevation, and closing the knife gate valve 4;
after the knife gate valve 4 is completely closed, the pumping pipe 5 is detached and cleaned.
In the method, a knife gate valve 4 is installed between a feed branch pipe 3 and a pumping pipe 5.
That is, the diameter of the pumping pipe 5 with the internal pipe diameter of the valve larger than 2/3 when the knife gate valve 4 is opened is selected in consideration of the pumping pressure, the pumping flow rate and the pipe diameter of the pumping pipe of the concrete vehicle-mounted pump. The knife gate valve 4 is then fixedly connected to the feed manifold 3, and the pumping line 5 is connected to the knife gate valve 4.
According to the method, the total mass of concrete in the column core when the steel column is fully filled is calculated according to the preset height of the steel column core, the section size of the column core and the mark number of the concrete;
calculating the pressure born by the section of the feeding branch pipe 3 when the steel column core is filled according to the total mass of the concrete and the effective section size of the feeding branch pipe 3;
selecting a vehicle-mounted pump with corresponding pumping pressure according to the pressure borne by the section of the feeding branch pipe 3;
the maximum concrete pumping pressure of the vehicle-mounted pump is greater than the pressure borne by the section of the feeding branch pipe 3.
The construction method of the jacking method of the invention is that the lower end of the steel column is provided with the feeding branch pipe 3 with the backflow preventer, the feeding branch pipe is directly connected with the conveying pipe of the pump truck, concrete is continuously poured into the steel column from bottom to top, and all gaps in the steel column can be completely filled without vibration. And stopping pumping and immediately closing the backflow preventing device when the concrete is jacked to the designed elevation requirement. The construction by the jacking method has the advantages of flexible operation, safety, reliability, reduction of labor intensity, improvement of working efficiency, effective guarantee of construction quality, reduction of construction cost and the like.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a box steel column irritates core concrete pumping climbing mechanism which characterized in that includes: pouring core concrete to support the steel column;
a grouting feed hole is formed in the side wall close to the bottom end of the core-pouring concrete supporting steel column;
the grouting feed hole is connected with a feed branch pipe;
the feeding branch pipe is connected with a grouting device;
and the feeding branch pipe is provided with a backflow preventer.
2. The box-type steel column core-grouting concrete pumping jacking mechanism as claimed in claim 1,
the feeding branch pipe is connected with the output end of the knife-type gate valve;
the input end of the knife gate valve is connected with a concrete vehicle-mounted pump through a pumping pipe.
3. The box-type steel column core-grouting concrete pumping jacking mechanism as claimed in claim 2,
when the knife gate valve is fully opened, the inner pipe diameter of the valve is larger than the 2/3 pipe diameter of the pumping pipe.
4. The box-type steel column core-grouting concrete pumping jacking mechanism as claimed in claim 1,
the core-filling concrete supporting steel column is vertically arranged;
the included angle between the feeding branch pipe and the core-grouted concrete supporting steel column ranges from 40 degrees to 50 degrees.
5. A pumping and jacking construction method for core-grouted concrete of a box-type steel column is characterized in that the pumping and jacking mechanism for the core-grouted concrete of the box-type steel column according to any one of claims 1 to 4 is adopted; the method comprises the following steps:
connecting the feeding branch pipe with a grouting feeding hole in the side wall of the bottom end of the core-grouted concrete supporting steel column;
connecting the feeding branch pipe to a grouting device through a pumping pipe;
a backflow prevention device is arranged on the feeding branch pipe;
and pumping concrete grouting material by using a pump truck with preset output power as a grouting device.
6. The pumping and jacking construction method for the core-grouted concrete of box-type steel columns according to claim 5, wherein in the step of connecting the feeding branch pipes with the grouting feeding holes on the side walls of the bottom ends of the core-grouted concrete supporting steel columns,
the feeding branch pipe is made of a steel pipe with the same specification and the same material as the pumping pipe;
the end of the feeding branch pipe is cut off obliquely at an angle of 45 degrees;
and (3) obliquely and downwards butting the inclined cutting plane of the feeding branch pipe with the grouting feeding hole of the core-grouting concrete support steel column, and welding and fixing by adopting gas shielded welding.
7. The pumping and jacking construction method for the box-type steel column core-grouting concrete as claimed in claim 5, wherein the method further comprises the following steps:
a knife gate valve is arranged between the feeding branch pipe and the pumping pipe.
8. The pumping and jacking construction method for the box-type steel column core-grouting concrete as claimed in claim 5, wherein the method further comprises the following steps:
calculating the total mass of concrete in the column core when the steel column is fully filled according to the preset height of the steel column core, the section size of the column core and the mark number of the concrete;
calculating the pressure born by the section of the feeding branch pipe when the steel column core is filled according to the total mass of the concrete and the effective section size of the feeding branch pipe;
selecting a vehicle-mounted pump with corresponding pumping pressure according to the pressure borne by the cross section of the feeding branch pipe;
the maximum concrete pumping pressure of the vehicle-mounted pump is greater than the pressure borne by the section of the feeding branch pipe.
9. The pumping and jacking construction method for the box-type steel column core-grouting concrete as claimed in claim 7, wherein the method further comprises the following steps:
stopping pumping grouting material when the core-grouted concrete in the steel column reaches a preset elevation, and closing the knife-type gate valve;
and after the knife gate valve is completely closed, the pumping pipe is detached and cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010553661.2A CN111636687A (en) | 2020-06-17 | 2020-06-17 | Box steel column core-filling concrete pumping jacking mechanism and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010553661.2A CN111636687A (en) | 2020-06-17 | 2020-06-17 | Box steel column core-filling concrete pumping jacking mechanism and construction method |
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| CN111636687A true CN111636687A (en) | 2020-09-08 |
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| CN202010553661.2A Pending CN111636687A (en) | 2020-06-17 | 2020-06-17 | Box steel column core-filling concrete pumping jacking mechanism and construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201358590Y (en) * | 2009-02-09 | 2009-12-09 | 中国第一冶金建设有限责任公司 | Plug-board stop return-flow concrete lift pouring device |
| CN202544416U (en) * | 2012-04-19 | 2012-11-21 | 中国十七冶集团有限公司 | Flow check device of concrete pumping and jacking connection pipe of steel pipe column |
| CN204590629U (en) * | 2015-04-30 | 2015-08-26 | 中国十九冶集团有限公司 | Hoop type connecting device for jacking steel pipe column concrete |
| CN205056580U (en) * | 2015-09-14 | 2016-03-02 | 重庆建工新型建材有限公司 | Concrete pumping pipeline belt cleaning device |
| CN209145295U (en) * | 2018-09-28 | 2019-07-23 | 李孝贤 | A kind of steel pipe column concrete lifting device |
| CN110439286A (en) * | 2019-08-23 | 2019-11-12 | 重庆建工第三建设有限责任公司 | A kind of liner is put more energy into joint steel pipe concrete column drag reduction jack-up construction method of weakening |
-
2020
- 2020-06-17 CN CN202010553661.2A patent/CN111636687A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201358590Y (en) * | 2009-02-09 | 2009-12-09 | 中国第一冶金建设有限责任公司 | Plug-board stop return-flow concrete lift pouring device |
| CN202544416U (en) * | 2012-04-19 | 2012-11-21 | 中国十七冶集团有限公司 | Flow check device of concrete pumping and jacking connection pipe of steel pipe column |
| CN204590629U (en) * | 2015-04-30 | 2015-08-26 | 中国十九冶集团有限公司 | Hoop type connecting device for jacking steel pipe column concrete |
| CN205056580U (en) * | 2015-09-14 | 2016-03-02 | 重庆建工新型建材有限公司 | Concrete pumping pipeline belt cleaning device |
| CN209145295U (en) * | 2018-09-28 | 2019-07-23 | 李孝贤 | A kind of steel pipe column concrete lifting device |
| CN110439286A (en) * | 2019-08-23 | 2019-11-12 | 重庆建工第三建设有限责任公司 | A kind of liner is put more energy into joint steel pipe concrete column drag reduction jack-up construction method of weakening |
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Application publication date: 20200908 |