CN100564700C - The job practices of lattice type steel column tower crane pedestal - Google Patents

The job practices of lattice type steel column tower crane pedestal Download PDF

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CN100564700C
CN100564700C CNB2007101646302A CN200710164630A CN100564700C CN 100564700 C CN100564700 C CN 100564700C CN B2007101646302 A CNB2007101646302 A CN B2007101646302A CN 200710164630 A CN200710164630 A CN 200710164630A CN 100564700 C CN100564700 C CN 100564700C
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steel column
steel
tower crane
latticed
foundation
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CN101240550A (en
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李元武
李宏伟
韩葆和
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Zhejiang three Construction Group Co., Ltd.
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ZHEJIANG CHANGCHENG CONSTRUCTION GROUP CO Ltd
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Abstract

格构式钢柱塔吊基础座的施工方法:在地下挖土施工前,在需要挖土位置打四根钻孔灌注桩,将焊接了由角钢与缀板组成的格构式钢柱的桩钢筋笼浇筑在钻孔灌注桩内,在格构式钢柱顶面安装转换承重钢板,在转换承重钢板上安装塔身基础节,在塔身基础节上安装塔身。在四个格构式钢柱之间及周围挖土,每下挖1-3米在格构式钢柱之间焊接水平剪刀支撑架和垂直剪刀支撑架,挖好基坑后,在基坑底板下用连接承台连接四个格构式钢柱。该施工方法适用性较强,特别适用于受基坑场地限止不能在挖好的基坑内安装塔吊的情况或者基坑开挖前必须在基坑位置安装使用塔吊的情况。用该方法建造的格构式塔吊基础座结构稳定、牢固、安全性较高。

Figure 200710164630

The construction method of the foundation seat of the lattice steel column tower crane: before the underground excavation construction, four bored piles are drilled at the position where the excavation is required, and the pile reinforcement of the lattice steel column composed of angle steel and patch plate is welded. The cage is poured in the bored cast-in-place pile, and the transfer load-bearing steel plate is installed on the top surface of the lattice steel column, the tower body foundation section is installed on the transfer load-bearing steel plate, and the tower body is installed on the tower body foundation section. Excavate the soil between and around the four latticed steel columns, and weld horizontal scissors support frame and vertical scissors support frame between the latticed steel columns for every 1-3 meters. The four latticed steel columns are connected under the base plate with connecting caps. This construction method has strong applicability, and is especially suitable for the situation that the tower crane cannot be installed in the excavated foundation pit due to the restriction of the foundation pit site or the situation that the tower crane must be installed and used in the foundation pit before the excavation of the foundation pit. The structure of the foundation base of the lattice tower crane built by this method is stable, firm and high in safety.

Figure 200710164630

Description

The job practices of lattice type steel column tower crane pedestal
Technical field
The present invention relates to a kind of construction techniques, particularly relate to the job practices of lattice type steel column tower crane pedestal.
Background technology
In the building trade, the vertical transport of the various constructional materialss on the building site is generally finished by tower crane, and whether steadily tower crane when the big object of hoisting weight operation safety, with tower crane pedestal is whether stable direct relation is arranged firmly.The job practices that tower crane pedestal is commonly used is to make a call to earlier four piles in the position of tower crane now, the body of the tower that on formed column foot, connects tower crane then by its pre-embedded bolt, stable inadequately, the safety of tower crane basis seat of building like this, along with rising progressively of building construction height, for keeping the stable of body of the tower, body of the tower is had to adopt and brace bar attachedly is connected with building.In addition, when large-scale basement or multi-storey basement construction, planar dimension is big because base pit engineering has, and cutting depth is dark, and vertical transport is particularly thorny, characteristics such as the construction plant is narrow and small, tower crane usually need be placed in the foundation ditch, during general way, digs the basement earthwork earlier, on the foundation ditch that digs, build tower crane pedestal again after having dug basement foundation ditch, tower crane is installed again.But, after running into foundation ditch and digging, be subjected to the foundation ditch place place restrictions on can not the foundation ditch that digs in tower crane is installed situation, perhaps must install and use the situation of tower crane during excavation of foundation pit in the foundation ditch position, just be not suitable for the method for above-mentioned construction tower crane pedestal.
Summary of the invention
The purpose of this invention is to provide that a kind of applicability is strong, the lattice type steel column tower crane pedestal job practices of easy construction, for realizing this goal of the invention, the technical solution used in the present invention is such:
The job practices of lattice type steel column tower crane pedestal is characterized in that comprising the steps:
1. make a call to the bored pile that matches with the tower crane body of the tower in four positions on the ground;
2. make laced of battened compression member: with four angle bar, two dual-purpose batten plates are welded into column;
3. laced of battened compression member is welded in the pile cages;
The pile cages that 4. will weld laced of battened compression member is cast in the bored pile;
5. at the laced of battened compression member end face conversion load-bearing steel plate is installed;
6. begin underground excavation and construction, between four laced of battened compression member and around cut the earth, dig certain distance under every, cut the bored pile pile concrete, weld horizontal scissors bracing frame between four laced of battened compression member, the vertical scissors bracing frame of welding between per two adjacent laced of battened compression member;
7. after the underground scholar of digging finishes, below the base plate of foundation pit that digs, construct steel concrete and connect cushion cap, four bored piles are linked together, further fix four laced of battened compression member.
Further, 5. above-mentioned steps can install the body of the tower base section afterwards on conversion load-bearing steel plate.
Mounting method between described laced of battened compression member, conversion load-bearing steel plate and the body of the tower base section is: pass conversion load-bearing steel plate and the welding of laced of battened compression member end face angle steel with one end of the anchor bolt on the body of the tower base section, again with laced of battened compression member end face angle steel and the welding of conversion load-bearing steel plate, and between laced of battened compression member side and conversion load-bearing steel plate bottom surface, weld the triangle stiffener, then the body of the tower base section is connected with the anchor bolt other end.
After described body of the tower base section installs, on the body of the tower base section, body of the tower can be installed.
Above-mentioned steps 7. after, aerated concrete building block or coarse sand separation layer can be set connecting between cushion cap and the base plate of foundation pit.
The described step 3. welding method of laced of battened compression member and pile cages is: laced of battened compression member and the bar welding of pile cages master muscle group, its lap length is no less than 3 meters.
Adopt the job practices of above-mentioned lattice type steel column tower crane pedestal, can before soil excavation, install tower crane earlier, the limit is dug the following cubic metre of earth limit of tower crane and is reinforced this tower crane pedestal with vertical support frame and horizontal shore, below base plate of foundation pit, construct steel concrete after foundation ditch digs again and connect cushion cap, further reinforce tower crane pedestal, can also be with already installed tower crane transportation cubic metre of earth when digging following cubic metre of earth of tower crane, this method easy construction, applicability is stronger, must install and use the situation of tower crane when particularly suitable is subjected to foundation ditch place restriction that the situation of tower crane or excavation of foundation pit can not be installed in the foundation ditch that digs in the foundation ditch position.The tower crane pedestal Stability Analysis of Structures of building with this method, firmly, safety is higher.
Description of drawings
Fig. 1 is for building the sectional drawing of the lattice type steel column tower crane pedestal that finishes.
Fig. 2 is the A-A sectional drawing of Fig. 1.
Fig. 3 is the B-B sectional drawing of Fig. 1.
Fig. 4 is the connection diagram of conversion load-bearing steel plate and laced of battened compression member.
Fig. 5 is the C-C sectional drawing of Fig. 4.
Fig. 6 is horizontal scissors bracing frame schematic diagram.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, present embodiment is the job practices of lattice type steel column tower crane pedestal, and concrete construction sequence is as follows:
1. make a call to the bored pile 1 that matches with the tower crane body of the tower in four positions on the ground;
2. make laced of battened compression member 3: four angle bar, 8, two dual-purpose batten plates 9 are welded into column;
3. laced of battened compression member 3 and pile cages 2 main muscle are helped the bar welding, its lap length is 3.5 meters;
The pile cages 2 that 4. will weld laced of battened compression member 3 is cast in the bored pile 1;
5. pass conversion load-bearing steel plate 4 and 8 welding of laced of battened compression member 3 end face angle steel with anchor bolt 11 1 ends, again laced of battened compression member end face angle steel 8 and conversion load-bearing steel plate 4 are welded, and between laced of battened compression member 3 sides and conversion load-bearing steel plate 4 bottom surfaces, weld triangle stiffener 10;
6. on conversion load-bearing steel plate 4, the body of the tower base section is installed;
7. the tower crane body of the tower is installed on the body of the tower base section;
8. begin underground excavation and construction, between four laced of battened compression member and around cut the earth, dig certain distance under every, cut the bored pile pile concrete, weld horizontal scissors bracing frame 5 between four laced of battened compression member 3, the vertical scissors bracing frame 6 of welding between per two adjacent laced of battened compression member 3;
9. after the underground scholar of digging finishes, below 12, construct steel concrete and connect cushion cap 7, four bored piles 1 are linked together, further fix four laced of battened compression member at the base plate of foundation pit that digs; 10. between described connection cushion cap 7 and base plate of foundation pit 12, be provided with and add coarse sand separation layer 13.

Claims (2)

1、格构式钢柱塔吊基础座的施工方法,其特征在于包括如下步骤:1. The construction method of the foundation base of the lattice type steel column tower crane is characterized in that it comprises the following steps: ①在地面上打四个位置与塔吊塔身相配合的钻孔灌注桩;① Drill four bored piles on the ground that match the body of the tower crane; ②制作格构式钢柱:将四根角铁,两两用缀板焊接成柱状;②Make lattice steel columns: weld four angle irons and dual-purpose panels to form columns; ③将格构式钢柱焊接在桩钢筋笼内;③Weld the latticed steel column in the pile reinforcement cage; ④将焊接了格构式钢柱的桩钢筋笼浇筑在钻孔灌注桩内;④ Pour the pile reinforcement cage welded with the lattice steel column into the bored pile; ⑤在格构式钢柱顶面安装转换承重钢板,再在转换承重钢板上安装塔身基础节;格构式钢柱、转换承重钢板和塔身基础节之间的安装方法为:用塔身基础节上的锚固螺栓一端穿过转换承重钢板与格构式钢柱顶面角钢焊接,再将格构式钢柱顶面角钢与转换承重钢板焊接,并在格构式钢柱侧面与转换承重钢板底面之间焊接三角加劲板,然后将塔身基础节与锚固螺栓另一端连接;⑤ Install the transfer load-bearing steel plate on the top surface of the lattice steel column, and then install the tower body foundation section on the transfer load-bearing steel plate; the installation method between the lattice steel column, the transfer load-bearing steel plate and the tower body foundation section is: use the tower body One end of the anchor bolt on the foundation section passes through the transfer load-bearing steel plate and welds the angle steel on the top surface of the latticed steel column, then welds the top angle steel of the latticed steel column to the converted load-bearing steel plate, and connects the side of the latticed steel column to the converted load-bearing The triangular stiffener is welded between the bottom of the steel plate, and then the foundation section of the tower body is connected with the other end of the anchor bolt; ⑥开始地下挖土施工,在四个格构式钢柱之间及周围挖土,每下挖一定距离,凿除钻孔灌注桩桩身混凝土,在四根格构式钢柱之间焊接水平剪刀支撑架,在每两根相邻格构式钢柱之间焊接垂直剪刀支撑架;⑥ Start the underground excavation construction, dig soil between and around the four latticed steel columns, dig a certain distance each time, chisel away the concrete of the pile body of the bored pile, and weld horizontally between the four latticed steel columns Scissors support frame, weld vertical scissors support frame between every two adjacent lattice steel columns; ⑦地下挖土完成后,在挖好的基坑底板以下,构筑钢筋混凝土连接承台,将四个钻孔灌注桩连接在一起,进一步固定四根格构式钢柱;再在连接承台与基坑底板之间设置加气砼砌块或粗砂隔离层。⑦After the underground excavation is completed, build a reinforced concrete connecting cap under the excavated foundation pit floor, connect the four bored piles together, and further fix the four latticed steel columns; Aerated concrete blocks or coarse sand isolation layers are set between the bottom plates of the foundation pit. 2、根据权利要求1所述的格构式钢柱塔吊基础座的施工方法,其特征在于所述步骤③格构式钢柱与桩钢筋笼的焊接方法为:格构式钢柱与桩钢筋笼主筋帮条焊接,其搭接长度不少于3米。2. The construction method for the foundation base of a latticed steel column tower crane according to claim 1, characterized in that the step ③ welding method of the latticed steel column and the pile reinforcement cage is: the latticed steel column and the pile reinforcement The cage main reinforcement and side bars are welded, and the lap length is not less than 3 meters.
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Address after: 310016 Great Wall Building, No. 60 Leiting Road, Shangcheng District, Hangzhou City, Zhejiang Province

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