CN110206311B - Rammed earth wall construction method for adding steel bars to square steel pipe column - Google Patents
Rammed earth wall construction method for adding steel bars to square steel pipe column Download PDFInfo
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- CN110206311B CN110206311B CN201910511938.2A CN201910511938A CN110206311B CN 110206311 B CN110206311 B CN 110206311B CN 201910511938 A CN201910511938 A CN 201910511938A CN 110206311 B CN110206311 B CN 110206311B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
- E04B2/60—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal characterised by special cross-section of the elongated members
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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
Abstract
The invention discloses a rammed earth wall construction method of a square steel pipe column with reinforcing steel bars, which comprises the steps of pre-embedding square steel pipes at two sides of a door and window opening and on a concrete foundation of a rammed earth wall corner column, and pouring concrete in the square steel pipes to form a square steel pipe construction column; connecting horizontal steel bars between the square steel pipe constructional columns; butterfly-shaped iron wire binding claws are adopted at intervals on the horizontal tie bars connecting the square steel pipe constructional columns and in the square steel pipes, and the ends of the iron wire binding claws are dispersedly paved in the rammed earth wall between the two square steel pipe constructional columns; after the rammed earth wall is rammed, a coping is arranged, and the coping and the main structure are reliably tied. The galvanized square steel pipe constructional column is arranged in the rammed earth wall body, and the horizontal steel bars are arranged, so that the integral bearing capacity and the anti-seismic performance of the wall body can be improved.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a rammed earth wall construction method capable of enhancing the bearing capacity and the anti-seismic performance of a rammed earth wall by adding steel bars to a square steel pipe column.
Background
The rammed earth building has the advantages of available local materials, simple construction, low cost, outstanding thermal performance, degradability, regeneration, low energy consumption in the processing process, no pollution and the like. Particularly, the rammed earth material has the ecological cost ratio advantage which cannot be compared with the conventional energy-saving material in the rural area. However, the inherent defects of the traditional rammed earth in the aspects of process, construction technology, seismic performance, durability and the like are undeniable, so that the traditional rammed earth is difficult to meet the urgent requirements of improving the living quality and the house safety, and is also a core factor for restricting the modern rammed earth application.
Diversified modern buildings such as native villas, hospitals and churches which are massively emerged in developed countries in Europe and America in the last two decades, and the winning cases of native buildings which frequently appear in international building awards in the past year are concrete manifestations of the trend.
In view of the outstanding ecological benefits and the universal geographical adaptability of modern times, modern raw soil materials and construction techniques thereof have become one of the most effective ways to realize green buildings, and are widely concerned and supported by research institutions and governments in the world, especially in developed countries.
At present, the domestic method for improving the bearing capacity and the earthquake resistance of the rammed earth structure house mainly comprises the following steps: the wooden columns are arranged at the joints of the four corners and the longitudinal and transverse walls of the house, the rammed earth is improved or modified (lime or cement is added into the earth), horizontal bamboo strips or other plant fibers are arranged in the wall, the number of layers and the height of the house are reduced, the bay and the depth are reduced, the integrity of a roof structure is improved, the connection with the rammed earth wall is improved, and the like. The measures are described in the documents of the industry standard of the people's republic of China, namely the building earthquake-resistant design Specification (GB 50011 plus 2010), the building earthquake-resistant technical code of the town (village) village (JGJ 161 plus 2008), the detailed earthquake-resistant structure diagram of the rural residents (SG 618-3) and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a technical method for constructing a rammed earth wall.
The invention is realized by the following technical scheme.
A method for constructing a rammed earth wall body with square steel pipe columns and reinforcing steel bars comprises the following steps:
the method comprises the steps of firstly, selecting the size of a square steel pipe according to the thickness of a rammed earth wall, and embedding the square steel pipe in the positions of two sides of a door and window opening and on a concrete foundation of a rammed earth wall corner column. After the construction of the rammed earth wall is finished and before the top pressing construction, self-compacting concrete is poured into the square steel tube to form a square steel tube constructional column;
connecting horizontal tie bars among the square steel pipe constructional columns according to the horizontal bar positions designed by the construction drawing, wherein one ends of the horizontal tie bars are bent bars, the bent bars penetrate through flat holes in the side walls of the end square steel pipes and are connected with the end square steel pipes in a 90-degree bent hook mode, the other ends of the horizontal tie bars penetrate through the side walls of the middle square steel pipes and are connected with the next square steel pipe, and pouring self-compacting concrete to anchor to form the square steel pipe constructional columns, and so on;
thirdly, alternately binding the claws in a butterfly shape by adopting iron wires on horizontal tie bars connected with the square steel pipe constructional column, inserting the iron wire claws into the square steel pipe, pouring self-compacting concrete, and dispersedly paving the ends of the iron wire claws into the rammed earth wall body and around the square steel pipe;
and step four, after the rammed earth wall is rammed, arranging a pressing top on the rammed earth wall and the top surface of the square steel pipe constructional column and performing reliable tie.
With respect to the above technical solutions, the present invention has a further preferable solution:
further, in the first step, galvanized square steel pipes are adopted along the length direction of the wall body, and the space between the constructional columns of the square steel pipes is not more than 3000mm and not more than 4500 mm; the cross section width of the galvanized square steel pipe constructional column is not less than 100 mm.
Further, in the second step, the diameter of the horizontal tie bar is not less than 14mm, the distance is not more than 1500mm, and the straight line segment of the hook is not less than 150 mm.
Further, in the second step, horizontal tie bars between the square steel pipe constructional columns are overlapped or not overlapped, and a full-length steel bar with a bent part at one end part is adopted when the horizontal tie bars are not overlapped; if the length of the lap joint is not less than 100mm, welding is adopted for jointing.
Further, if the end part of the square steel pipe is lapped, a flat hole is formed in the side wall of the end part of the square steel pipe, when the rammed earth wall is rammed to the position of the horizontal tie bar, a bent bar is connected to one side of the horizontal tie bar, penetrates through the flat hole in the side wall of the end part of the square steel pipe, and is connected with the end part of the square steel pipe in a 90-degree hook manner; and welding a straight steel bar in the middle of the horizontal tie bar, wherein the straight steel bar penetrates through the middle square steel pipe, and is cut off and welded with each other in a superposed manner after penetrating through the middle square steel pipe.
Further, in the third step, the iron wire claws are respectively inserted into three side wall flat holes of the square steel pipe, extend into the middle part of the square steel pipe, and finally self-compacting concrete is poured for anchoring, and the end parts of the iron wire are dispersedly paved in the rammed earth wall body; binding claws at butterfly binding points by adopting iron wires at intervals on the horizontal tie bars, wherein the intervals are 500 mm;
the length of the iron wire handle claw is not less than 30 mm; the distance between the iron wires on the iron wire claw and the surface of the rammed earth wall is not less than 50mm, and the distance between the iron wires and the surface of the rammed earth wall is not more than 500 mm.
Furthermore, in the fourth step, a top pressing stirrup is arranged in the top pressing and is anchored by a tie bar; a bent lower tie bar and an upper tie bar extend into the square steel pipe from the top, the upper portions of the lower tie bar and the upper tie bar are bent and then anchored in the structural beam, and the upper tie bar extends into the concrete coping and is anchored; the jacking longitudinal ribs are distributed along the inner sides of the jacking stirrups; and one vertically distributed anchoring steel bar is anchored on the top surface of the rammed earth wall and extends into the coping for connection.
Furthermore, one anchoring steel bar is arranged at the interval of 1000mm and anchored in the rammed earth wall, and the anchoring depth is not less than 150 mm; the coping and the main structure are connected by adopting upper and lower tie bars, the space is not more than 500mm, and the diameter of the upper and lower tie bars is not less than 12mm of three-level deformed steel bar; the square steel pipe adopts the upper tie bar to be connected with the major structure, and lower tie bar is no less than two, stretches into square steel pipe length and is not less than 300 mm.
Furthermore, in the fourth step, the jacking height is not less than 150mm, and the steel bars tied with the structural main body extend into the square steel pipe constructional column by not less than 300 mm; the strength of the concrete is not less than C25.
Further, in the fourth step, the anchoring depth of the tie bars is not less than 15 times of the diameter of the tie bars, and the distance is not more than 300 mm.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention forms an integral net sheet inside the rammed earth wall body by adopting the square steel pipe constructional column, the horizontal tie bars and the iron wire claws, and then reliably connects the rammed earth wall body, the constructional column and the structural beam through the top pressing. The method effectively improves the integrity and stability of the rammed earth wall body, can effectively control the external flash of the rammed earth wall body, and can greatly improve the horizontal shear-resistant bearing capacity and safety performance of the modern rammed earth wall body. The invention can be popularized and used in modern rammed earth buildings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a view of the arrangement of the facade elements according to the invention;
FIG. 2 is an elevation view of the connection of a square steel pipe and a steel bar;
FIG. 3 is a plan view of a reinforced steel wire connecting the jaws;
FIGS. 4(a) and (b) are respectively an elevation view and a plan view of the connection of the steel pipe column and the wire handle claw;
FIG. 5 is a cross-sectional view of the connection of the coping with the rammed earth wall and the square steel pipe.
In the figure: 1. an end portion square steel pipe; 2. a concrete foundation; 3. ramming a soil wall; 4. pressing; 5. a middle square steel tube; 6. bending the reinforcing steel bar; 7. a side wall flat hole I; 8. a side wall flat hole II; 9. horizontally pulling and tying the steel bars; 10. a side wall flat hole III; 11. the lap joint of the steel bars; 12. welding the steel bars; 13. straightening steel bars; 14. a wire handle claw; 15. butterfly-shaped binding points; 16. a side wall flat hole IV; 17. pressing the longitudinal ribs; 18. pressing a stirrup; 19. pulling up the steel bar; 20. pulling down the steel bar; 21. anchoring the reinforcing steel bars; 22. self-compacting concrete; 23. a structural beam.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
As shown in fig. 1 and 2, the novel rammed earth wall is a specially designed wall with reasonable material composition and adopts a mechanically rammed raw earth wall as a main enclosure structure. The wall body comprises plinths, a rammed earth wall body and a coping.
The invention relates to a method for constructing a rammed earth wall by adding steel bars to a square steel pipe column, which comprises the following steps:
s1, selecting the size of the square steel tube according to the thickness of the rammed earth wall 3, pre-embedding the square steel tube on the two sides of the door and window opening and the concrete foundation 2 of the corner column of the rammed earth wall 3, and pouring self-compacting concrete 22 in the square steel tube to form a square steel tube constructional column;
the rammed earth wall body is provided with the square steel pipe constructional column according to the following requirements:
1.1. structural columns are required to be arranged at the two sides of the door and window opening and the corner columns of the rammed earth wall;
1.2. constructing columns by using galvanized square steel pipes along the length direction of the rammed earth wall, wherein the distance is not more than 3000mm and not more than 4500 mm;
1.3. the cross section width of the galvanized square steel pipe constructional column is not smaller than 150mm and not smaller than 100 mm;
1.4. the galvanized square steel pipe constructional column is required to extend into the inside of the plinth to be reliably connected with the foundation beam or the beam bearing the load of the rammed earth wall.
And S2, forming flat holes (a side wall flat hole I7, a side wall flat hole II 8 and a side wall flat hole III 10) on the corresponding square steel pipe according to the position of the horizontal tie bar 9 designed by the construction drawing, wherein the size of the flat holes depends on the diameter of the horizontal steel bar, as shown in figure 2. When waiting that rammed earth wall body 3 tamps to horizontal reinforcing bar position, installation horizontal tie bar 9, 9 one end of horizontal tie bar are bending reinforcement 6, and bending reinforcement 6 runs through to 1 lateral wall flat hole I7 of tip square steel pipe, and the horizontal tie bar end should take 90 degrees crotch and reliably be connected with tip square steel pipe 1, and the crotch straightway is not less than 150 mm. The other end penetrates through the side wall of the middle square steel tube 5 and is connected with the next square steel tube, self-compacting concrete 22 is poured and anchored to form a square steel tube constructional column, and the rest is done in sequence;
the novel rammed earth enclosure wall body is provided with horizontal tie bars according to the following requirements:
2.1. the diameter of the horizontal tie bar is not smaller than 14mm, and the distance is not larger than 1500 mm.
2.2. The end of the horizontal tie bar is reliably connected with the square steel pipe constructional column by adopting a 90-degree hook, and the straight section of the hook is not less than 150 mm.
2.3. The steel bars between the two constructional columns are not suitable for lap joint, and the through long steel bars are suitable for use; if the lapping is adopted, the lapping length is not less than 100mm, and welding joint is adopted.
If the square steel pipes are overlapped, flat holes I7 are formed in the side walls of the end portion square steel pipes 1, when the rammed earth wall is rammed to the position of the horizontal tie bars 9, bent steel bars 6 are connected to one sides of the horizontal tie bars 9 and welded at the steel bar welding positions 12, the bent steel bars penetrate through the flat holes I7 in the side walls of the end portion square steel pipes 1 and are connected with the end portion square steel pipes 1 in a 90-degree hook mode; a straight steel bar 13 is welded in the middle of the horizontal tie steel bar, the straight steel bar 13 penetrates through a side wall flat hole II 8 and a side wall flat hole III 10 of the middle square steel tube 5, is cut off and overlapped in the middle square steel tube 5, and is welded at a steel bar lap joint 11.
S3, after the horizontal steel bars are arranged, binding the claws 14 at the butterfly binding points 15 by adopting iron wires at intervals on the horizontal tie steel bars 9 connected with the square steel pipe constructional column, wherein the intervals are 500mm and are distributed one by one, as shown in figure 3. Binding the claws 14 by using iron wires in the square steel tube, wherein the iron wire claws 14 are respectively inserted into three side wall flat holes (a side wall flat hole II 8, a side wall flat hole III 10 and a side wall flat hole IV 16) of the square steel tube and extend into the middle part of the square steel tube as shown in figures 4(a) and 4(b), and finally pouring self-compacting concrete 22 for anchoring, wherein the end parts of the iron wires are dispersedly paved in the ramming earth wall 3; the distance between the iron wires and the surface of the rammed earth wall is not less than 50mm, and the distance between the iron wires and the surface of the rammed earth wall is not more than 500 mm. As shown in fig. 3.
The claw 14 is tied by galvanized iron wires between the novel rammed earth enclosure wall body construction measures (constructional columns and tie bars) and the rammed earth wall body, and the construction measures and the tie bars are set according to the following requirements:
3.1. the galvanized iron wire handle claws should not be smaller than 16 # iron wires, each iron wire handle claw should have at least four iron wires, and the length of the iron wire should not be smaller than 30 mm.
3.2. The iron wire claw 14 is arranged along the joint surface of the steel column and the rammed earth wall body and is reliably connected with the constructional column, the constructional column can be used for being connected in a hole-opening grouting anchoring mode, and the interval is not larger than 500 mm.
3.3. The iron wire adopts butterfly ligature claw and reinforcing bar, and in the dispersion was laid rammed earth wall, the iron wire should not be less than 50mm apart from rammed earth wall surface, and the interval should not be greater than 500 mm.
According to the iron wire of construction drawing design open the flat hole to the claw on corresponding square steel tubular column surface, wait that the rammed earth wall tamps to the iron wire when claw position, the iron wire stretches into the square steel tubular column in the claw root, finally through the thin stone concrete placement anchor. The arrangement of the wire handle claw meets the requirement of the step S3.
And S4, after the rammed earth wall is rammed, arranging a pressing top 4 on the rammed earth wall 3 and the top surface of the square steel pipe constructional column, and reliably drawing the top.
As shown in fig. 5, the coping is arranged at the top of the rammed earth wall 3 between the square steel pipe constructional columns, the coping is provided with a coping stirrup 18 and is anchored by adopting a tie bar, a bent lower tie bar 20 and an upper tie bar 19 extend into the square steel pipe 5 from the top, the lower tie bar 20 and the upper tie bar 19 are anchored into a structural beam 23 after being bent, and the upper tie bar 19 extends into the concrete coping 4 for anchoring; the lower tie bar 20 is welded with an upper tie bar 19 and a frame-shaped top-pressing stirrup 18, top-pressing longitudinal ribs 17 are distributed along the inner side of the top-pressing stirrup 18, and a vertically distributed anchoring bar 21 is anchored on the top surface of the rammed earth wall 3 and extends into the top-pressing 4 for connection.
Before the top is manufactured, self-compacting concrete is poured in the square steel pipe column. The coping is connected with the rammed earth wall by adopting anchoring steel bars, one anchoring steel bar is arranged at the interval of 26 mm and anchored in the rammed earth wall, and the anchoring depth is not less than 150 mm; the coping and the main structure are connected by adopting upper and lower tie bars 19 and 20, the space is not more than 500mm, and the diameter of the upper and lower tie bars is not less than 12mm of three-level deformed steel bar; the square steel pipe 5 is connected with the main structure through an upper tie bar 19, and the length of the lower tie bar 20 is not less than 300 mm.
The novel rammed earth enclosure wall body is required to be provided with a coping according to the following requirements:
4.1. the rammed earth wall pressing top is reliably tied with the structure main body, the rammed earth wall constructional column and the vertical steel bar;
4.2. the jacking height is not less than 150mm, the reinforcement can be arranged according to the structure, and the concrete strength is not less than C25;
4.3. the steel bars tied with the main structure body are preferably stretched into the square steel pipe constructional column and are not preferably less than 300mm for anchoring;
4.4. and the anchor is anchored with the main structure by using a tie bar, the anchoring depth is not less than 15d, and the distance is not more than 300.
The invention is illustrated by the following specific examples.
Example 1
And S1, selecting the size of the square steel pipe according to the thickness of the wall body, and embedding the square steel pipe in the plinth or on a reliable basis. The distance between the galvanized square steel pipe constructional columns along the length direction of the wall body is 3000 mm; the cross section width of the galvanized square steel pipe constructional column is 200 mm;
s2, when the earth wall to be rammed is rammed to the position of the horizontal steel bar, the end of the horizontal tie bar takes a 180mm straight-line segment of a 90-degree hook. The diameter of the horizontal tie bar of the rammed earth wall is 18mm, and the distance is 1400 mm; the straight line segment of the hook is 160 mm.
The steel bars between the two constructional columns are lapped, the lapping length is 120mm, and welding connection is adopted.
S3, the distance between the iron wire claws and the surface of the rammed earth wall is 80mm and 400 mm.
The claws are tied through galvanized iron wires, 16 # iron wires are adopted for the galvanized iron wires, at least four iron wires are required to be arranged on each iron wire claw, and the length of each iron wire is 30 mm. Adopting constructional columns to open holes, grouting, anchoring and connecting, and enabling the interval to be 450 mm. The iron wire of the iron wire claw is 60mm away from the surface of the rammed earth wall, and the distance is 500 mm. The arrangement of the iron wire handles meets the requirements that the jacking height is not less than 150mm, and the concrete strength is not less than C25; the steel bars tied with the main structure body are preferably extended into the square steel pipe constructional column by 300mm for anchoring; and the main structure is anchored by using a tie bar, the anchoring depth is 15d, and the distance is 280 mm.
Example 2
And S1, selecting the size of the square steel pipe according to the thickness of the wall body, and embedding the square steel pipe in the plinth or on a reliable basis. The distance between the galvanized square steel pipe constructional columns along the length direction of the wall body is 2000 mm; the cross section width of the galvanized square steel pipe constructional column is 300 mm;
s2, when the earth wall to be rammed is rammed to the position of the horizontal steel bar, the end of the horizontal tie bar takes a 200mm straight-line segment of a 90-degree hook. The diameter of the horizontal tie bar of the rammed earth wall is 16mm, and the distance between the horizontal tie bar and the rammed earth wall is 1200 mm; the straight section of the hook is 180 mm.
The steel bars between the two constructional columns are lapped, the lapping length is 160mm, and welding connection is adopted.
S3, the distance between the iron wire claws and the surface of the rammed earth wall is 60mm and 300 mm.
The claws are tied through galvanized iron wires, 16 # iron wires are adopted for the galvanized iron wires, at least four iron wires are required to be arranged on each iron wire claw, and the length of each iron wire is 60 mm. Adopting constructional columns to open holes, grouting, anchoring and connecting at intervals of 350 mm. The iron wire of the iron wire claw is 70mm away from the surface of the rammed earth wall, and the distance is 400 mm. The arrangement of the iron wire claw meets the requirement that the jacking height is 350mm, and the concrete strength is not less than C25; the steel bars tied with the main structure body are preferably extended into the square steel pipe constructional column by 500mm for anchoring; and the main structure is anchored by using a tie bar, the anchoring depth is 20d, and the distance is 220 mm.
Example 3
And S1, selecting the size of the square steel pipe according to the thickness of the wall body, and embedding the square steel pipe in the plinth or on a reliable basis. The distance between the galvanized square steel pipe constructional columns along the length direction of the wall body is 1500 mm; the cross section width of the galvanized square steel pipe constructional column is 300 mm;
s2, when the earth wall to be rammed is rammed to the position of the horizontal steel bar, the end of the horizontal tie bar takes a 200mm straight-line segment of a 90-degree hook. The diameter of the horizontal tie bar of the rammed earth wall is 16mm, and the distance between the horizontal tie bar and the rammed earth wall is 1000 mm; the straight line segment of the hook is 200 mm.
The steel bars between the two constructional columns are lapped, the lapping length is 150mm, and welding joint is adopted.
S3, the distance between the iron wire claws and the surface of the rammed earth wall is 100mm and 300 mm.
The claws are tied through galvanized iron wires, 16 # iron wires are adopted as the galvanized iron wires, at least four iron wires are required to be arranged on each iron wire claw, and the length of each iron wire is 70 mm. Adopting constructional columns to open holes, grouting, anchoring and connecting at intervals of 350 mm. The iron wire is 90mm away from the surface of the rammed earth wall, and the distance between the iron wire and the surface of the rammed earth wall is 480 mm. The arrangement of the iron wire handles meets the requirement that the jacking height is 200mm, and the concrete strength is not less than C25; the steel bars tied with the main structure body are preferably extended into the square steel pipe constructional column by 450mm for anchoring; and the main structure is anchored by using a tie bar, the anchoring depth is 25d, and the distance is 240 mm.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (10)
1. A method for constructing a rammed earth wall body with a square steel pipe column and reinforcing steel bars is characterized by comprising the following steps:
selecting the size of a square steel pipe according to the thickness of a rammed earth wall (3), pre-embedding the square steel pipe on the positions of two sides of a door and window opening and a concrete foundation (2) of a rammed earth wall corner column, and pouring self-compacting concrete (22) into the square steel pipe to form a square steel pipe constructional column;
connecting horizontal tie bars (9) between the square steel pipe constructional columns according to the horizontal steel bar positions designed by the construction drawing, wherein one ends of the horizontal tie bars (9) are bent steel bars (6), the bent steel bars (6) penetrate through flat holes in the side walls of the end square steel pipes (1) and are connected with the end square steel pipes in a 90-degree bent hook manner, the other ends of the horizontal tie bars penetrate through the side walls of the middle square steel pipes (5) and are connected with the next square steel pipe, pouring self-compacting concrete (22) to anchor to form the square steel pipe constructional columns, and so on;
thirdly, butterfly-shaped binding of claws (14) is carried out on horizontal tie bars (9) connected with the square steel pipe constructional column at intervals by adopting iron wires, the claws (14) are bound in the square steel pipe by the butterfly-shaped iron wires, concrete is poured, and ends of the claws (14) are dispersedly paved into the rammed earth wall body (3) and around the square steel pipe by the iron wires; forming an integral net sheet inside the rammed earth wall by adopting a square steel pipe constructional column, horizontal tie bars and iron wire claws;
and step four, after the rammed earth wall body (3) is rammed, arranging a pressing top (4) on the rammed earth wall body (3) and the top surface of the square steel pipe constructional column and performing reliable knot drawing.
2. The method for constructing the rammed earth wall body by adding the steel bars to the square steel pipe column according to the claim 1, wherein in the first step, galvanized square steel pipes are adopted along the length direction of the rammed earth wall body (3), the distance between the square steel pipe constructional columns is not more than 3000mm, and is not more than 4500 mm; the width of the section of the square steel pipe constructional column is not less than 100 mm.
3. The method for constructing the rammed earth wall body by adding the steel bars to the square steel pipe column in the second step, which is characterized in that the diameter of the bent steel bars (6) is not less than 14mm, the distance between the bent steel bars is not more than 1500mm, and the straight line segment of the hook is not less than 150 mm.
4. The method for constructing the rammed earth wall body by adding the steel bars to the square steel pipe columns according to the claim 1, wherein in the second step, the horizontal tie bars (9) between the square steel pipe construction columns are overlapped or not overlapped, and when the horizontal tie bars are not overlapped, full-length steel bars with bent parts at one end parts are adopted; if the length of the lap joint is not less than 100mm, welding is adopted for jointing.
5. The method for constructing the rammed earth wall body with the square steel pipe columns and the reinforcing steel bars according to claim 4, wherein if the steel pipes are lapped, flat holes are formed in the side wall of the square steel pipe (1) at the end part, when the rammed earth wall is rammed to the position of the horizontal tie bars (9), the bending steel bars (6) are connected to one side of the horizontal tie bars (9), the bending steel bars (6) penetrate into the flat holes in the side wall of the square steel pipe (1) at the end part, and are connected with the square steel pipe (1) at the end part through hooks of 90 degrees; a straight steel bar (13) is welded in the middle of the horizontal tie steel bar (9), the straight steel bar (13) penetrates through the middle square steel tube (5), and the steel bar is cut off after penetrating through the middle square steel tube (5) and is welded in a mutual overlapping mode.
6. The method for constructing the rammed earth wall body by adding the steel bars into the square steel pipe column according to the claim 1, characterized in that in the third step, iron wire claws (14) are respectively inserted into three side wall flat holes of the square steel pipe and extend into the middle part of the square steel pipe, and finally self-compacting concrete (22) is poured for anchoring, and the end parts of the iron wires are dispersedly paved in the rammed earth wall body (3); iron wires are adopted to bind the claws (14) at the butterfly binding points (15) on the horizontal tie bars (9) at intervals, and the claws are distributed at intervals of 500 mm;
the length of the iron wire handle claw (14) is not less than 30 mm; the distance between the iron wires on the iron wire handles (14) and the surface of the rammed earth wall body (3) is not less than 50mm, and the distance is not more than 500 mm.
7. The method for constructing the rammed earth wall body with the square steel pipe column and the reinforcing steel bars according to the claim 1, characterized in that in the fourth step, a top pressing stirrup (18) is arranged in the top pressing (4) and is anchored by using a tie bar; a bent lower tie bar (20) and an upper tie bar (19) extend into the square steel pipe (5) from the top, the upper parts of the lower tie bar (20) and the upper tie bar (19) are anchored in the structural beam (23) after being bent, and the upper tie bar (19) extends into the concrete coping (4) for anchoring; the coping longitudinal ribs (17) are distributed along the inner side of the coping stirrup (18); and an anchoring steel bar (21) which is vertically distributed is anchored on the top surface of the rammed earth wall body (3) and extends into the coping (4) for connection.
8. The method for constructing the rammed earth wall body by adding the steel bars into the square steel pipe column according to claim 7, wherein one anchoring steel bar (21) is arranged at a distance of 1000mm and anchored in the rammed earth wall body, and the anchoring depth is not less than 150 mm; the distance between the upper and lower tie bars (19, 20) is not more than 500mm, and the diameter is not less than 12 mm; the length of the lower tie bars (20) is not less than two and is not less than 300 mm.
9. The method for constructing the rammed earth wall body by adding the steel bars to the square steel pipe column according to claim 1, wherein in the fourth step, the height of the top pressing is not less than 150mm, and the steel bars tied with the structural body extend into the square steel pipe construction column by not less than 300 mm; the strength of the concrete is not less than C25.
10. The method for constructing a rammed earth wall with square steel pipe columns and reinforcing steel bars according to claim 1, wherein in the fourth step, the anchoring depth of the tie bars is not less than 15 times of the diameter of the tie bars, and the distance between the tie bars is not more than 300 mm.
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| US7033116B1 (en) * | 2004-09-03 | 2006-04-25 | Thomas Ward | Post-tensioned rammed earth construction |
| CN206143951U (en) * | 2016-09-07 | 2017-05-03 | 昆明理工大学 | Connected node of rammed earth wall and blockwork |
| CN208219921U (en) * | 2018-05-08 | 2018-12-11 | 天津城建大学 | Improve the prefabricated reinforcement connection structure and loam wall of loam wall globality |
| CN109868917A (en) * | 2017-12-04 | 2019-06-11 | 天津城建大学 | A kind of precast concrete construction column loam wall that horizontal tension rib is set |
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|---|---|---|---|---|
| US7033116B1 (en) * | 2004-09-03 | 2006-04-25 | Thomas Ward | Post-tensioned rammed earth construction |
| CN206143951U (en) * | 2016-09-07 | 2017-05-03 | 昆明理工大学 | Connected node of rammed earth wall and blockwork |
| CN109868917A (en) * | 2017-12-04 | 2019-06-11 | 天津城建大学 | A kind of precast concrete construction column loam wall that horizontal tension rib is set |
| CN208219921U (en) * | 2018-05-08 | 2018-12-11 | 天津城建大学 | Improve the prefabricated reinforcement connection structure and loam wall of loam wall globality |
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