CN104594359B - 一种多排型钢搭接支护的施工方法 - Google Patents

一种多排型钢搭接支护的施工方法 Download PDF

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CN104594359B
CN104594359B CN201410675499.6A CN201410675499A CN104594359B CN 104594359 B CN104594359 B CN 104594359B CN 201410675499 A CN201410675499 A CN 201410675499A CN 104594359 B CN104594359 B CN 104594359B
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CN104594359A (zh
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马春根
曹开伟
徐东辉
王章斌
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Jiangxi Zhongheng Underground Space Technology Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract

本发明涉及一种多排型钢搭接支护的施工方法,包括以下步骤:在H型钢翼板的四角上焊接角钢,形成导槽;在基坑边放线定位;采用桩机的专用振动器夹住H型钢的腹板两端,使其腹板垂直于基坑侧壁方向,并振入到地下设计深度;测放桩位,采用桩机的专用振动器夹住另一个H型钢的腹板两端,使其腹板平行于基坑侧壁方向,将其振入地下设计深度,并保证其一个导槽与前一个H型钢桩的导槽相互搭接;为增加H型钢桩的抗剪能力,可在H型钢桩外侧设置拉锚桩或在H型钢桩内侧设置内支撑;当基坑完工后可通过桩机的专用振动器将H型钢拔起回收。本发明显著提升了H型钢支护桩的施工速度和抗剪能力,降低了施工成本,因此具有较好的市场前景。

Description

一种多排型钢搭接支护的施工方法
技术领域
本发明涉及建筑施工领域,具体涉及一种多排型钢搭接支护的施工方法。
背景技术
目前,在市政管线施工时,多采用单排H型钢桩或钢板桩的支护施工方法,该方法工期短、造价低、可回收,然而由于现有的H型钢桩是通过挖掘机改装配上液压振动锤的方式将其压入地下,因此容易造成H型钢桩压入位置的偏移,无法进行搭接,造成止水和挡土效果不佳,同时其支护结构的水平位移和竖向沉降过大、开挖深度浅、安全性能差,因此制约了H型钢桩支护在建筑基坑行业中的大量推广应用。
发明内容
本发明要解决的技术问题是提供一种施工速度快、工程质量高的多排型钢搭接支护的施工方法。
为解决以上技术问题,本发明的技术方案是:一种多排型钢搭接支护的施工方法,其特征在于包括以下步骤:
第1步:在H型钢翼板的四角上焊接角钢,形成导槽;
第2步:在基坑边放线定位;
第3步:采用桩机的专用振动器夹住H型钢的腹板两端,使其腹板垂直于
基坑侧壁方向,并振入到地下设计深度;
第4步:测放桩位,采用桩机的专用振动器夹住另一个H型钢的腹板两端,使其腹板平行于基坑侧壁方向,将其振入地下设计深度,并保证其一个导槽与前一个H型钢桩的导槽相互搭接;
第5步:重复第3步和第4步施工,完成第一排H型钢桩的搭接支护施工;
第6步:根据支护桩抗剪力的要求,可在第一排H型钢桩后部继续搭接H
型钢桩;
第7步:为增加工字钢的抗剪能力,可在H型钢桩外侧设置拉锚桩或在H
型钢桩内侧设置内支撑;
第8步:当基坑完工后可通过桩机的专用振动器将H型钢拔起回收。
所述H型钢底部可设置有高强度刀头。
所述专用振动器通过可滑动导向支架固定在机架上,所述机架上还设置有可展开的滑动导向套。
所述专用振动器包括振动装置,所述振动装置顶部设置有与桩机顶部的鹤嘴滑轮相连的起吊绳,两侧设置有加压轮,底部设置旋转盘,所述旋转盘底部两侧设置有可变径夹具。
所述振动装置为液压或电动驱动方式。
所述可变径夹具包括液压油缸和可移动夹紧装置。
所述加压轮上设置有与桩机上卷扬机相连的加压绳。
本发明通过专用振动器和H型钢上的导槽实现了基坑支护中的多排H型钢桩的精确搭接,显著提升了H型钢支护桩的整体性能和施工效率,并且在基坑施工完成后可将H型钢回收重复利用,大幅减少了工程造价,具有节能环保效益,解决了长期困扰基坑支护施工中难以解决的技术难题,因此具有广阔的市场前景。
附图说明
图1是本发明专用振动器结构示意图;
图2是本发明专用振动器安装在桩机上用于振入H型钢的使用状态图;
图3是本发明工字钢搭接支护方案一的平面图;
图4是本发明工字钢搭接支护方案二的平面图。
具体实施方式
一种多排型钢搭接支护的施工方法,如附图3所示,包括以下步骤:
第1步:在H型钢翼板的四角上焊接角钢12,形成导槽;
第2步:在基坑边放线定位;
第3步:采用桩机的专用振动器9的可变径夹具4夹住H型钢的腹板两端,在其腹板垂直于基坑方向,将其振入地下预定深度;
第4步:测放桩位,采用桩机的专用振动器9的可变径夹具4夹住另一个H型钢的腹板两端,旋转90°在其腹板平行于基坑方向,将其振入地下预定深度,并通过桩机机架上的可滑动导向支架10和滑动导向套11保证其一个导槽与前一个H型钢桩的导槽相互搭接;
第5步:重复第3步和第4步施工,完成第一排H型钢桩的搭接支护施工;
第6步:根据支护桩抗剪力的要求,可在第一排H型钢桩后部继续搭接H型钢桩,如图4所示;
第7步:为增加H型钢桩的抗剪能力,可在H型钢桩外侧设置拉锚桩或在H型钢桩内侧设置内支撑;
第8步:当基坑完工后可通过桩机的专用振动器9将H型钢拔起回收。
当遇到软质岩时,可在所述H型钢底部可设置有高强度刀头,以便其振入地下。
如附图1、2所示,所述专用振动器9通过可滑动导向支架10固定在机架上,所述机架上还设置有可展开的滑动导向套11。
所述专用振动器9包括振动装置2,所述振动装置2顶部设置有与桩机顶部的鹤嘴滑轮相连的起吊绳1,两侧设置有加压轮3,底部设置旋转盘5,所述旋转盘5底部两侧设置有可变径夹具4。
所述振动装置2为液压或电动驱动方式。
所述可变径纵梁夹具4包括液压油缸6和可移动夹紧装置7。
所述加压轮3上设置有与桩机上卷扬机相连的加压绳8。
以上所述,仅为本发明较佳的具体实施方式,但本发明保护范围并不局限于此,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。

Claims (7)

1.一种多排型钢搭接支护的施工方法,其特征在于包括以下步骤:
第1步:在H型钢翼板的四角上焊接角钢,形成导槽;
第2步:在基坑边放线定位;
第3步:采用桩机的专用振动器夹住H型钢的腹板两端,使其腹板垂直于
基坑侧壁方向,并振入到地下设计深度;
第4步:测放桩位,采用桩机的专用振动器夹住另一个H型钢的腹板两端,使其腹板平行
于基坑侧壁方向,将其振入地下设计深度,并保证其一个导槽与前一个H型钢桩的导槽相互搭接;
第5步:重复第3步和第4步施工,完成第一排H型钢桩的搭接支护施工;
第6步:根据支护桩抗剪力的要求,在第一排H型钢桩后部继续搭接H型钢桩;
第7步:为增加H型钢桩的抗剪能力,在H型钢桩外侧设置拉锚桩或在H型钢桩内侧设置内支撑;
第8步:当基坑完工后通过桩机的专用振动器将H型钢拔起回收。
2.根据权利要求1所述的施工方法,其特征在于:所述H型钢底部设置有高强度刀头。
3.根据权利要求1所述的施工方法,其特征在于:所述专用振动器(9)通过可滑动导向支架(10)固定在机架上,所述机架上还设置有可展开的滑动导向套(11)。
4.根据权利要求3所述的施工方法,其特征在于:所述专用振动器(9)包括振动装置(2),所述振动装置(2)顶部设置有与桩机顶部的鹤嘴滑轮相连的起吊绳(1),两侧设置有加压轮(3),底部设置旋转盘(5),所述旋转盘(5)底部两侧设置有可变径夹具(4)。
5.根据权利要求4所述的施工方法,其特征在于:所述振动装置(2)为液压或电动驱动方式。
6.根据权利要求4所述的施工方法,其特征在于:所述可变径夹具(4)包括液压油缸(6)和可移动夹紧装置(7)。
7.根据权利要求4所述的施工方法,其特征在于:所述加压轮(3)上设置有与桩机上卷扬机相连的加压绳(8)。
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