CN103174155A - Reverse construction method and construction steel support of erecting steel column and pouring concrete foundation in sequential mode - Google Patents
Reverse construction method and construction steel support of erecting steel column and pouring concrete foundation in sequential mode Download PDFInfo
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- CN103174155A CN103174155A CN2013100975755A CN201310097575A CN103174155A CN 103174155 A CN103174155 A CN 103174155A CN 2013100975755 A CN2013100975755 A CN 2013100975755A CN 201310097575 A CN201310097575 A CN 201310097575A CN 103174155 A CN103174155 A CN 103174155A
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Abstract
Provided is a reverse construction method and a construction steel support of erecting a steel column and pouring a concrete foundation in a sequential mode. The construction method comprises the following steps: step one, design and manufacture of the reverse construction steel support of erecting the steel column and pouring the concrete foundation in the sequential mode; step two, location and installation of the reverse construction steel support of erecting the steel column and pouring the concrete foundation in the sequential mode; step three, installation and check of a first section steel column; and step four, pouring and constructing of the large-size concrete foundation in a concrete one-time pouring and forming construction method. According to the construction method, the construction sequence of erecting the first section steel column and pouring the large-size concrete foundation in the sequential mode is adopted, a layering construction form is not adopted in the process of the pouring and constructing of the large-size concrete foundation, and therefore the built large-size concrete foundation does not have construction joints. Meanwhile, construction progress is improved, civil engineering work efficiency is improved, and the shortcomings that the large-size concrete foundation is long in engineering construction period and low in efficiency can be overcome.
Description
Technical field
The present invention relates to a kind of job practices of foundation of house of steel reinforced concrete frame construction, and a kind of steel bracket that is applied in this job practices.
Background technology
Adopted the house of steel reinforced concrete framework design when construction, the first segment steel column in the steel reinforced concrete frame construction is wrapped in volume of concrete foundation.For this structure, traditional job practices is, after filling pile construction is completed, the first paragraph concrete pouring construction is carried out by absolute altitude in top at castinplace pile, and bury the steel column stone bolt underground on this section concrete, this section concrete build complete after vertical first segment steel column (the first segment steel column is connected with the steel column stone bolt) again, and then carry out the second segment concrete pouring construction, form at last the structure that volume of concrete foundation wraps the first segment steel column.This traditional job practices has following 2 shortcomings: be 1, construction in layer mode (pouring construction that is volume of concrete foundation is divided into first paragraph concrete pouring construction and second segment concrete pouring construction) due to what adopt, so have constuction joint in volume of concrete foundation.2, long construction period, efficiency of construction is low.
Summary of the invention
The purpose of this invention is to provide after a kind of first vertical steel column pouring concrete basis reversed construction method and construction and use steel bracket, solve the technical problem that volume of concrete foundation that traditional job practices builds up has constuction joint; And solve traditional low problem of job practices long construction period, efficiency of construction.
For achieving the above object, the present invention adopts following technical scheme: pouring concrete basis reversed construction method after a kind of first vertical steel column is characterized in that step is as follows: step 1, first after vertical steel column pouring concrete basis adverse construction method with design, the making of steel bracket; After described first vertical steel column, pouring concrete basis adverse construction method comprises a horizontal girder steel and two horizontal girder steel supporting legs with steel bracket, the interlude of described horizontal girder steel is provided with the steel column foot connecting platform that is connected use with the steel column foot plate on the first segment steel column, described two horizontal girder steel supporting legs are welded to connect respectively at the two ends to girder steel, wherein laterally the upper end of girder steel supporting leg is welded to connect with horizontal girder steel, and laterally the lower end of girder steel supporting leg is provided with the horizontal girder steel supporting leg heel slab that is connected use with the top of castinplace pile.
The installation of step 3, first segment steel column, check; First make the first segment steel column in place, pouring concrete basis adverse construction method is connected with steel bracket even the first segment steel column is by steel column foot plate, steel column foot connecting platform with after being connected bolt and first founding steel column, adjust simultaneously absolute altitude, misalignment of axe and the verticality of first segment steel column by adjusting bolt, after the first segment steel column installs and adjusts and completes, be connected temporary fixed girder steel again between first segment steel column and first segment steel column, all first segment steel columns are linked together by temporary fixed girder steel.
In described step 2, first after vertical steel column, pouring concrete basis adverse construction method can adopt the overlap joint welding manner to fix a top that is located at castinplace pile with steel bracket, namely according to pouring concrete basis adverse construction method after first vertical steel column with the form of structure of steel bracket, take the cross axis of first segment steel column as benchmark, carry out steel bracket location unwrapping wire at the top of castinplace pile, then will first found pouring concrete basis adverse construction method after steel column with reinforcing bar and be welded to connect with a top bar splicing at the top of steel bracket and castinplace pile.
In described step 2, first after vertical steel column, pouring concrete basis adverse construction method also can adopt a top to bury the crab-bolt mode underground with steel bracket and fix a top that is located at castinplace pile, namely according to pouring concrete basis adverse construction method after first vertical steel column with the form of structure of steel bracket, take the cross axis of first segment steel column as benchmark, at the top of castinplace pile unwrapping wire, hole and bury chemical anchor bolts underground, will stand first by chemical anchor bolts that pouring concrete basis adverse construction method is connected with the top of castinplace pile with steel bracket after steel column.
In described step 3, after the first segment steel column installs and adjusts and completes, can also the first segment steel column with laterally be connected the steel column diagonal brace between girder steel.
After described first vertical steel column, pouring concrete basis adverse construction method can also comprise a vertical girder steel and a vertical girder steel supporting leg with steel bracket, one end of described vertical girder steel is welded to connect with the interlude of horizontal girder steel, vertically the other end of girder steel is welded to connect with the upper end of vertical girder steel supporting leg, and vertically the lower end of girder steel supporting leg is provided with the vertical girder steel supporting leg heel slab that is connected use with the top of castinplace pile.
Described first segment steel column is round steel tubing string or H steel column.
Pouring concrete basis adverse construction method steel bracket after a kind of first vertical steel column, it is characterized in that: comprise a horizontal girder steel and two horizontal girder steel supporting legs, the interlude of described horizontal girder steel is provided with the steel column foot connecting platform that is connected use with the steel column foot plate on the first segment steel column, described two horizontal girder steel supporting legs are welded to connect respectively at the two ends to girder steel, wherein laterally the upper end of girder steel supporting leg is welded to connect with horizontal girder steel, and laterally the lower end of girder steel supporting leg is provided with the horizontal girder steel supporting leg heel slab that is connected use with the top of castinplace pile.
After this first founds steel column, the basic adverse construction method of pouring concrete can also comprise a vertical girder steel and a vertical girder steel supporting leg with steel bracket, one end of described vertical girder steel is welded to connect with the interlude of horizontal girder steel, vertically the other end of girder steel is welded to connect with the upper end of vertical girder steel supporting leg, and vertically the lower end of girder steel supporting leg is provided with the vertical girder steel supporting leg heel slab that is connected use with the top of castinplace pile.
Compared with prior art the present invention has following characteristics and beneficial effect: job practices of the present invention has adopted the first sequence of construction of vertical first segment steel column after-pouring volume of concrete foundation, the pouring construction process of volume of concrete foundation no longer adopts the construction in layer mode, so the volume of concrete foundation that builds up does not have constuction joint.
Job practices of the present invention has adopted the first sequence of construction of vertical first segment steel column after-pouring volume of concrete foundation, it can effectively improve construction speed, accelerate the civil engineering operating efficiency, volume of concrete foundation engineering construction cycle length, inefficient shortcoming have been alleviated, the roof insulating of also having alleviated the winter construction covering does not possess the pressure (namely can utilize the first segment steel column to take brooder, need not set up the steel pipe shelf again) that steel column is installed.
The present invention has also designed a kind of steel bracket of top of the castinplace pile that is arranged on the steel column surrounding, by this steel bracket, thereby can make the first segment steel column in the situation that volume of concrete foundation does not put in place and carries out absolute altitude, axis location and control the installation that realizes steel column.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing.
Fig. 1 be the first first after vertical steel column pouring concrete basis adverse construction method with the schematic top plan view of steel bracket.
Fig. 2 be the first first after vertical steel column pouring concrete basis adverse construction method be arranged on facade structures schematic diagram between first segment steel column and castinplace pile with steel bracket.
Fig. 3 is the second schematic perspective view that first pouring concrete basis adverse construction method is connected with the first segment steel column with steel bracket after vertical steel column.
Fig. 4 is the schematic diagram that the first segment steel column links together by temporary fixed girder steel.
Fig. 5 is the construction process schematic diagram that first founds pouring concrete basis reversed construction method after steel column.
Fig. 6 first founds after steel column pouring concrete basis adverse construction method with the installation procedure schematic diagram of steel bracket.
The horizontal girder steel of Reference numeral: 1-, the horizontal girder steel supporting leg of 2-, the vertical girder steel of 3-, the vertical girder steel supporting leg of 4-, the temporary fixed girder steel of 5-, 6-steel column diagonal brace, 7-castinplace pile, 8-first segment steel column, 9-steel column foot connecting platform, 10-steel column foot plate, the horizontal girder steel supporting leg of 11-heel slab, the vertical girder steel supporting leg of 12-heel slab, 13-Bo plate top surface, 14-Bo plate bottom surface, 15-adjust bolt.
The specific embodiment
After described first vertical steel column, pouring concrete basis adverse construction method has two kinds with steel bracket.
after the first is first found steel column, the basic adverse construction method of pouring concrete uses steel bracket referring to Fig. 1, Fig. 2: comprise a horizontal girder steel 1 and two horizontal girder steel supporting legs 2, the interlude of described horizontal girder steel 1 is provided with the steel column foot connecting platform 9 that is connected use with the steel column foot plate 10 on first segment steel column (also being bottom column), laterally girder steel 1 is connected with steel column foot plate 10 on the first segment steel column by steel column foot connecting platform 9, described two horizontal girder steel supporting legs 2 are welded to connect respectively at the two ends to girder steel 1, wherein laterally the upper end of girder steel supporting leg 2 is welded to connect with horizontal girder steel 1, laterally the lower end of girder steel supporting leg 2 is provided with the horizontal girder steel supporting leg heel slab 11(that is connected use with the top of castinplace pile 7 and also is horizontal girder steel supporting leg suspension column flange), laterally girder steel supporting leg 2 is connected with the top of castinplace pile 7 by horizontal girder steel supporting leg heel slab 11.
the second first after vertical steel column pouring concrete basis adverse construction method with steel bracket referring to Fig. 3: with the first first after vertical steel column the basic adverse construction method of pouring concrete be with the steel bracket difference, the second first after vertical steel column pouring concrete basis adverse construction method steel bracket be on the basis of the first, a vertical girder steel 3 and a vertical girder steel supporting leg 4 have been increased, one end of described vertical girder steel 3 is welded to connect with the interlude of horizontal girder steel 1, vertically the other end of girder steel 3 is welded to connect with the upper end of vertical girder steel supporting leg 4, vertically the lower end of girder steel supporting leg 4 is provided with the vertical girder steel supporting leg heel slab 12(that is connected use with the top of castinplace pile 7 and also is vertical girder steel supporting leg suspension column flange), vertically girder steel supporting leg 4 is connected with the top of castinplace pile 7 by vertical girder steel supporting leg heel slab 12.
Shown in Figure 5, pouring concrete basis reversed construction method after described first vertical steel column, its step is as follows.
First after vertical steel column, pouring concrete basis adverse construction method uses steel bracket when design, survey out steel column surrounding castinplace pile spacing and castinplace pile top mark high, be used as the length of horizontal girder steel 1 with steel column surrounding castinplace pile spacing, deduct the high height that is used as steel bracket of a top mark with level ground design elevation on the suspension column concrete, will design according to the weight of first segment steel column the sectional dimension of steel bracket in addition.First after vertical steel column, pouring concrete basis adverse construction method is made as raw material take hot rolled H-shaped usually of steel bracket, is independent stable unit, a space.In addition, regulate with the location of steel bracket and first segment steel column for ease of the basic adverse construction method of pouring concrete after first founding steel column, laterally girder steel supporting leg heel slab 11(has vertical girder steel 3 and vertically during girder steel supporting leg 4, also comprises vertical girder steel supporting leg heel slab 12), steel column foot connecting platform 9 also with steel column foot plate 10(be the steel column foot flange) on connecting hole aperture preferably about the large 10mm of diameter than the crab-bolt that connects them.
When adopting the bulk-breaking lift-on/lift-off system, suspender is selected wire rope and snap ring, and should carry out strength checking, intensity level must have enough intensity to guarantee safely (vertical girder steel 3 is arranged and vertically during girder steel supporting leg 4, lashing location will in the horizontal girder steel 1 of steel bracket and the vertical crossover sites of girder steel 3).
After first after vertical steel column, pouring concrete basis adverse construction method uses steel bracket in place, in the time of will to horizontal girder steel supporting leg heel slab 11(, vertical girder steel 3 and vertical girder steel supporting leg 4 being arranged with transit, also comprise vertical girder steel supporting leg heel slab 12) proofread and correct, also to check again plan-position and absolute altitude, guarantee that they are in the deviation of regulation and stipulation.
In described step 2, first after vertical steel column, pouring concrete basis adverse construction method can adopt the overlap joint welding manner to fix a top that is located at castinplace pile with steel bracket, namely according to pouring concrete basis adverse construction method after first vertical steel column with the form of structure of steel bracket, take the cross axis of first segment steel column as benchmark, carry out steel bracket location unwrapping wire at the top of castinplace pile, then will first found pouring concrete basis adverse construction method after steel column with reinforcing bar and be welded to connect with a top bar splicing at the top of steel bracket and castinplace pile.Specifically, in the time of horizontal girder steel supporting leg heel slab 11(need to being had vertical girder steel 3 and vertical girder steel supporting leg 4, also comprise vertical girder steel supporting leg heel slab 12) weld with a top reinforcing bar.
In described step 2, first after vertical steel column, pouring concrete basis adverse construction method also can adopt a top to bury the crab-bolt mode underground with steel bracket and fix a top that is located at castinplace pile, namely according to pouring concrete basis adverse construction method after first vertical steel column with the form of structure of steel bracket, take the cross axis of first segment steel column as benchmark, at the top of castinplace pile unwrapping wire, hole and bury chemical anchor bolts underground, will stand first by chemical anchor bolts that pouring concrete basis adverse construction method is connected with the top of castinplace pile with steel bracket after steel column.When using chemical anchor bolts, use level gauge to check the foundation pile top mark of castinplace pile high, to determine the length of chemical anchor bolts.At the top of castinplace pile unwrapping wire, hole and when burying chemical anchor bolts underground, to push up in the stake of castinplace pile and carry out unwrapping wire according to base coordinate point and figure paper size, to punch with Churn drill according to diameter and the length of chemical anchor bolts, use the instruments such as cylinder, hairbrush of blowing that the dirt in the hole is cleaned out, clean to guarantee in the hole.After cleaning out in the hole, first chemically-planted steel bar glue is put into the hole, then rotation is implanted chemical anchor bolts (by the first pouring concrete basis adverse construction method steel bracket after vertical steel column of the bottom adjusting nut in chemical anchor bolts and top anchor nut leveling, after leveling, fastening bottom adjusting nut and top anchor nut, and with pressing plate and laterally girder steel supporting leg heel slab or vertically girder steel supporting leg heel slab weld all around, concrete installation process can be referring to Fig. 6).
The installation of step 3, first segment steel column 8, check; First make first segment steel column 8 in place, pouring concrete basis adverse construction method is connected with steel bracket even first segment steel column 8 is by steel column foot plate 10, steel column foot connecting platform 9 with after being connected bolt 15 and first founding steel column, adjust simultaneously absolute altitude, misalignment of axe and the verticality of first segment steel column by adjusting bolt 15, after the first segment steel column installs and adjusts and completes, be connected temporary fixed girder steel 5 again between first segment steel column and first segment steel column, make all first segment steel columns by temporary fixed girder steel 5 link together (referring to Fig. 4);
Described first segment steel column 8 has round steel tubing string or two kinds of H steel columns (referring to Fig. 4).In described step 3, if the round steel tubing string in first segment steel column 8 when mounted can't with first segment steel column 8 in H steel column (Core Walls Structure steel column) drawknot form stable unit, consider on-the-spot installation location and quality requirement, after the first segment steel column installs and adjusts and completes, also need to be connected steel column diagonal brace 6(referring to Fig. 2 between first segment steel column 8 and horizontal girder steel 1).
In step 3, also has following some attention.
1, first segment steel column preliminary examination and supporting: after steel column is marched into the arena, the constructor coordinates the positions such as the main position of the members such as on-site supervision engineer coupled columns, support such as appearance and size, diameter of bolt hole and position, connector position to check comprehensively, can install after meeting design, related standards.
2, the inspection of orientation axis, absolute altitude: before installing, reply building orientation axis, support absolute altitude are checked, and can begin to install after qualified.The method that orientation axis takes inside to establish auxiliary axis is controlled, and at the bottom of post, absolute altitude can adopt adjusting nut accurately to control.
3, the first segment steel column is installed, is proofreaied and correct: after the first segment steel column in place, first adjust absolute altitude, then adjust misalignment of axe, adjust at last verticality; Add thin parallels at suspension column after the steel column height mark adjustment and pad, and strain with steel cable, guarantee the spatial stability of first segment steel column.
The course of work of the present invention: the present invention is to first segment steel column and first pouring concrete basis adverse construction method installing and measuring, locating and fixedly having higher requirement with steel bracket after vertical steel column; when carrying out concrete pouring construction, guarantee concrete vibrating can not make steel column and first after vertical steel column pouring concrete basis adverse construction method be offset with steel bracket.
Quality control about pouring concrete basis reversed construction method after first vertical steel column is as follows.
The standard that first after vertical steel column, pouring concrete basis reversed construction method is carried out: the installation quality of first segment steel column should satisfy " code for acceptance of construction quality of steel structures " technical requirements (GB50205-2001), allowable variation is installed is seen Table 1.
Table 1 first segment steel column is installed allowable error table (mm)
| Sequence number | Project | |
| 1 | First segment steel column (also being bottom column) post lower shaft line is offset orientation axis | 3.0 |
| 2 | First segment steel column orientation axis | 1.0 |
| 3 | The verticality of first segment steel column | H/1000, and be not more than 10.0 |
| 4 | Stone bolt (crab-bolt) off-centring | 2.0 |
| 5 | The bearing surface absolute altitude | ±3.0 |
| 6 | The bearing surface levelness | L/1000 |
Quality assurance measure: 1, at the horizontal girder steel supporting leg heel slab 11 of welding and vertical girder steel supporting leg heel slab 12(, chemical anchor bolts are installed) must guarantee verticality and the degree of depth of chemical anchor bolts in process, can the usage level chi, ruler controls, chemical anchor bolts can carry out the installation of upper component installing 24 hours rears.2, between two adjacent holes, forbid boring and chemically-planted steel bar glue to inject synchronous construction.3, should in time clear up first after vertical steel column pouring concrete basis adverse construction method before the first segment steel column in place with the dirt of steel bracket upper surface, first after vertical steel column pouring concrete basis adverse construction method with the absolute altitude of the upper surface of steel bracket, the requirement that axis location should satisfy drawing, standard.4, fielding welding should have draught exclusion device, and the rainy day must not welding.5, when building volume of concrete foundation, proofread and correct at any time verticality and the displacement of first segment steel column with transit, as deviation occurs, take measures in time to correct.When 6, building volume of concrete foundation, control the concrete rate of climb well, make its even rising.
Claims (8)
1. first pouring concrete basis reversed construction method after vertical steel column is characterized in that step is as follows:
step 1, first after vertical steel column pouring concrete basis adverse construction method with design, the making of steel bracket, after described first vertical steel column, pouring concrete basis adverse construction method comprises a horizontal girder steel (1) and two horizontal girder steel supporting legs (2) with steel bracket, the interlude of described horizontal girder steel (1) be provided with first segment steel column (8) on the steel column foot plate (10 are connected the steel column foot connecting platform (9) of use, described two horizontal girder steel supporting legs (2) are welded to connect respectively at the two ends to girder steel (1), wherein laterally the upper end of girder steel supporting leg (2) is welded to connect with horizontal girder steel (1), laterally the lower end of girder steel supporting leg (2) is provided with the horizontal girder steel supporting leg heel slab (11) that is connected use with the top of castinplace pile (7),
Step 2, first after vertical steel column pouring concrete basis adverse construction method with location, the installation of steel bracket; Namely after castinplace pile (7) construction is completed, adopt bulk-breaking lift-on/lift-off system pouring concrete basis adverse construction method steel bracket after vertical steel column is installed first at the top of the castinplace pile of first segment steel column installation site surrounding, make first that pouring concrete basis adverse construction method props up the top that is located at castinplace pile with steel bracket after vertical steel column, and steel bracket is fixedly connected with castinplace pile firmly;
Installation, the check of step 3, first segment steel column (8); First make first segment steel column (8) in place, pouring concrete basis adverse construction method is connected with steel bracket even first segment steel column (8) is by steel column foot plate (10), steel column foot connecting platform (9) with after being connected bolt (15) and first founding steel column, adjust simultaneously absolute altitude, misalignment of axe and the verticality of first segment steel column by adjusting bolt (15), after the first segment steel column installs and adjusts and completes, be connected temporary fixed girder steel (5) again between first segment steel column and first segment steel column, all first segment steel columns are linked together by temporary fixed girder steel (5);
Step 4, employing concrete one-time-concreting molding construction method carry out the pouring construction of volume of concrete foundation.
2. pouring concrete basis reversed construction method after first vertical steel column according to claim 1, it is characterized in that: in described step 2, first after vertical steel column, pouring concrete basis adverse construction method adopts the overlap joint welding manner to fix a top that is located at castinplace pile with steel bracket, namely according to pouring concrete basis adverse construction method after first vertical steel column with the form of structure of steel bracket, take the cross axis of first segment steel column as benchmark, carry out steel bracket at the top of castinplace pile and locate unwrapping wire, then will first found pouring concrete basis adverse construction method after steel column with reinforcing bar is welded to connect with a top bar splicing at the top of steel bracket and castinplace pile.
3. pouring concrete basis reversed construction method after first vertical steel column according to claim 1, it is characterized in that: in described step 2, first after vertical steel column, pouring concrete basis adverse construction method adopts the stake top to bury crab-bolt mode fixing top that is located at castinplace pile underground with steel bracket, namely according to pouring concrete basis adverse construction method after first vertical steel column with the form of structure of steel bracket, take the cross axis of first segment steel column as benchmark, at the top of castinplace pile unwrapping wire, hole and bury chemical anchor bolts underground, after first founding steel column by chemical anchor bolts, the basic adverse construction method of pouring concrete is connected with the top of castinplace pile with steel bracket.
4. pouring concrete basis reversed construction method after first vertical steel column according to claim 1, it is characterized in that: in described step 3, after the first segment steel column installs and adjusts and completes, also need to be connected steel column diagonal brace (6) between first segment steel column (8) and horizontal girder steel (1).
5. pouring concrete basis reversed construction method after first vertical steel column according to claim 1, it is characterized in that: after described first vertical steel column, pouring concrete basis adverse construction method also comprises a vertical girder steel (3) and a vertical girder steel supporting leg (4) with steel bracket, one end of described vertical girder steel (3) is welded to connect with the interlude of horizontal girder steel (1), vertically the other end of girder steel (3) is welded to connect with the upper end of vertical girder steel supporting leg (4), vertically the lower end of girder steel supporting leg (4) is provided with the vertical girder steel supporting leg heel slab (12) that is connected use with the top of castinplace pile (7).
6. pouring concrete basis reversed construction method after first vertical steel column according to claim 1, it is characterized in that: described first segment steel column (8) is round steel tubing string or H steel column.
7. first pouring concrete basis adverse construction method steel bracket after vertical steel column, it is characterized in that: comprise a horizontal girder steel (1) and two horizontal girder steel supporting legs (2), the interlude of described horizontal girder steel (1) is provided with the steel column foot connecting platform (9) that is connected use with the steel column foot plate (10) on the first segment steel column, described two horizontal girder steel supporting legs (2) are welded to connect respectively at the two ends to girder steel (1), wherein laterally the upper end of girder steel supporting leg (2) is welded to connect with horizontal girder steel (1), laterally the lower end of girder steel supporting leg (2) is provided with the horizontal girder steel supporting leg heel slab (11) that is connected use with the top of castinplace pile (7).
8. pouring concrete basis adverse construction method steel bracket after first vertical steel column according to claim 7, it is characterized in that: after this first founds steel column, the basic adverse construction method of pouring concrete also comprises a vertical girder steel (3) and a vertical girder steel supporting leg (4) with steel bracket, one end of described vertical girder steel (3) is welded to connect with the interlude of horizontal girder steel (1), vertically the other end of girder steel (3) is welded to connect with the upper end of vertical girder steel supporting leg (4), vertically the lower end of girder steel supporting leg (4) is provided with the vertical girder steel supporting leg heel slab (12) that is connected use with the top of castinplace pile (7).
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| CN110016926A (en) * | 2018-01-10 | 2019-07-16 | 云南中乾集成房屋有限公司 | A kind of arrangement and method for construction of bearing capacity and the compound isolated footing of Floor screw under the steel column of duration simultaneous growth |
| CN111188498A (en) * | 2020-01-14 | 2020-05-22 | 广州华隧威预制件有限公司 | Construction method of evacuation platform |
| CN111719577A (en) * | 2020-05-22 | 2020-09-29 | 中国建筑第八工程局有限公司 | Construction method of building foundation |
| CN115506606A (en) * | 2022-10-28 | 2022-12-23 | 中国二十二冶集团有限公司 | Construction method for central steel column of high formwork of tubular structure |
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| CN103174155B (en) | 2015-02-18 |
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