CN106436692A

CN106436692A - Convex four-shaft cement stirring soil implanted prefabricated reinforced concrete I-shaped pile enclosure wall

Info

Publication number: CN106436692A
Application number: CN201610589842.4A
Authority: CN
Inventors: 严平; 梁毅
Original assignee: Hangzhou Nanlian Base Foundation Engineering Co Ltd
Current assignee: Hangzhou Nanlian Base Foundation Engineering Co Ltd
Priority date: 2016-07-21
Filing date: 2016-07-21
Publication date: 2017-02-22

Abstract

In order to overcome the defect of difficult implantation of implanted piles in a hard soil stirring cement soil implanted I-shaped pile enclosure wall structure, and break through the use limitation of the stirring cement soil implanted I-shaped pile enclosure wall in deep large foundation pit engineering, the invention provides an improved convex four-shaft stirring cement soil implanted pile foundation pit enclosure structure-convex four-shaft cement stirring soil implanted prefabricated reinforced concrete I-shaped pile enclosure wall; foundation soil is stirred to form a convex four-shaft cement soil stirring pile through an improved four-shaft cement soil stirring pile implanting machine; and compared with a general stirring pile, the pile is additionally provided with one shaft stirring pile in the axis perpendicular to the advancement direction of the stirring pile implanting machine, and the implanting range of implanted I-shaped piles is widened due to existence of the pile body, so that the I-shaped piles are more easily implanted in the stirring pile body, the construction progress can be accelerated, and the engineering construction cost is saved.

Description

Convex four axle soil-cement implants prefabricated reinforced concrete h pile enclosure wall

Technical field

The present invention relates to it is a kind of pre- for the enclosure wall way-convex four axle soil-cement implantation in Foundation Pit Support Engineering Reinforcing bar processed mixes concrete h pile enclosure wall.

Technical background

Cement mixing method interplantation prestressed reinforced concrete stake especially interplantation h pile enclosure wall is on China edge Obtain popularization and application in extra large Pit Surroundings, and achieve good economic benefit；But it also has the deficiency of itself, It is mainly manifested in following aspect：

In conventional plant stake technique, during implantation prefabricated reinforced concrete h pile, what typically the corresponding stirring of requirement was formed stirs Mix stake and should be external in h pile, its a diameter of 850mm of normal requirement, or even reach more than 900mm, especially in harder grittiness In the cohesive soil of soil and hard plastic, so than more smoothly, h pile could be implanted in cement mixing method；For deeper Foundation ditch, for meeting needs, then needs the more heavy in section h pile of implantation to form enclosure wall, this just needs to stir the water of larger diameter Soil mixing pile curtain, increased difficulty of construction, and construction costs also will improve, and therefore, former plant stake technique is in deep big foundation pit Application be restricted.

Content of the invention

For overcoming above-mentioned h pile to implant difficult in pan soil and make to implant large scale I-shaped in deep big foundation pit engineering Type is gone along with sb. to guard him piling wall and is succinctly facilitated, the invention provides a kind of speed of application is fast, implant convenience, reliable in quality, cheap water Soil implants the foundation pit enclosure wall way of prestressed pile.

The present invention is directed in Foundation Pit Support Engineering, the building enclosure form of cement mixing method interplantation prestressing force h pile Studied, develop a kind of convex four axle stirring concrete earth and plant stake enclosure wall.This invention is stirred using improved four axle soil cements Mix unit head pile-grafting machine, implant h pile in stirring concrete earth, plant stake conveniently, one-shot forming, succinctly, quickly.

The invention has the beneficial effects as follows：

1st, by setting formation convex four axle at plan excavation pit edge using improved four axle Soil-cement pile-grafting machines Cement mixing method, facilitates the implantation of prestressing force conventional size H pile；Also can achieve the implantation of large scale h pile, be Soil-cement implantation application in deeper big Foundation Pit Support Engineering for the h pile enclosure wall is had laid a good foundation.

2nd, the stake footpath of each pile body in each width mixing pile can be flexibly selected using four axle Soil-cement pile-grafting machines, can Effectively reduce construction costs；

3rd, compared to common major diameter mixing pile interplantation piling wall, convex four axle stirring concrete earth plants the mixing pile stake in piling wall Footpath significantly reduces, and the soil body region being affected by agitation reduces, and that is to say the disturbance reducing to the original state soil body around, strengthens and plants stake Overall structural of wall；The presence of H pile water between stake soil mixing pile inner core rod (steel pipe, deal pile, mao bamboon stake etc.), makes plant Piling wall is more stable.

Brief description

1 the present invention is further described with reference to the accompanying drawings and examples.

Fig. 1 is three kinds of horizontal layout form figures of convex four axle Soil-cement interplantation H pile in the embodiment of the present invention 1, Fig. 2 is that the convex four axle stirring concrete earth that interplantation H pile convex four axle cement mixing method is formed plants stake enclosure wall plan, Wherein Fig. 2-1 is the plan planting piling wall using the convex four axle stirring concrete earth that set one hole stirring technique is formed, and Fig. 2-2 is to adopt Plant the plan of piling wall with the convex four axle stirring concrete earth that common overlapping mode stirring technique is formed, Fig. 2-3 is to adopt every one Insert one plan planting the convex four axle stirring concrete earth plant piling wall that stake mode is formed, Fig. 2-4 is using the plant inserting every two The plan that plug convex four axle stirring concrete earth plants piling wall is strengthened in the interplantation that stake mode is formed.

In figure：1- convex four axle cement mixing method, 2- prefabricated reinforced concrete h pile, 3- convex four axle stirs water Soil plant piling wall, 4- intend excavation pit, 5- plant stake enclosure wall axis, 6- interplantation plug, 1. the-the first width convex four axle soil cement stir Mix stake, 2. the-the second width convex four axle cement mixing method, 3. the-the three width convex four axle cement mixing method.

Specific embodiment

As depicted in figs. 1 and 2, a kind of convex four axle stirring concrete earth plants the foundation pit enclosure method of piling wall, walks including following Suddenly：

1) according to the h pile size Selection suitable mixing pile stake footpath that implantation is determined in advance, along plan excavation pit (4) Edge line or enclosure wall axis direction (5) adopt improved four axle stirring concrete earth pile-grafting machines stirring formed convexs four axle water Soil mixing pile (1), after soil cement stirs in stake holes, with four axle stirring concrete earth pile-grafting machines by prefabricated reinforced concrete H pile (2) implantation cement mixing method (1), in major diameter mixing pile in the middle of the big end implantation of H pile (2), small end head is planted Enter in the minor diameter mixing pile at plush copper position of four axle cement mixing methods (1).

2) using the Cement Mixing Pile Construction Technology in set one hole, side stirring concrete earth, h pile is implanted on side to this example 1 (2), progressively push ahead, form convex four axle stirring concrete earth and plant piling wall (3)；Consider to select also dependent on site specific Set one hole shown in the close slotting method (interplantation stake is close to insert) of common overlap joint shown in Fig. 2-2 and Fig. 2-3 inserts one every one, and (interplantation stake is inserted every one One) construction technology formed convex four axle stirring concrete earth plant piling wall go along with sb. to guard him mode.If adjacent two interplantation pile spacings are larger, As in Figure 2-4, plant the stability of piling wall (3) it is contemplated that in adjacent H pile for strengthening whole convex four axle stirring concrete earth Between cement mixing method in implant the enhancing plug (6) (steel-pipe pile, deal pile, mao bamboon stake etc.) in suitable stake footpath, four axle water Soil mixing pile (1), interplantation H pile (2), interplantation plug (6) synergy, the safety of common guarantee base pit engineering.

Claims

1. a kind of Soil-cement in base pit engineering plants stake enclosure wall, it is characterized in that：

1) using the new convex four axle Soil-cement pile-grafting machine researched and developed along enclosure wall axis, add the water of specified quantitative while stirring Mud and water, form convex four axle cement mixing pile；

2) adopt suitable overlapping mode to stir along enclosure wall axis direction and form four axle cement mixing method piling walls, water is stirred on side Prefabricated i shaped steel rib concrete pile is implanted on soil side, and both are collectively forming convex four axle stirring concrete earth and plant stake enclosure wall, must Plug (steel pipe, deal pile, mao bamboon stake etc.) can be implanted in the cement mixing pile not implanting H pile when wanting and go along with sb. to guard him knot to strengthen Structure resistance to overturning, reaches the purpose of foundation pit enclosure.

2. convex four axle stirring concrete earth according to claim 1 plants stake enclosure wall, it is characterized in that：Described convex four axle Cement mixing method, is formed using improved four axle Soil-cement pile-grafting machine stirring concrete earths, the spread pattern of four pile bodies Can be three coaxial types or coaxial type two-by-two.In four mixing piles, that pile body diameter away from margin of foundation pit can According to the size of H pile to be implanted, suitably reduce, other three piles also can determine stake footpath size by this principle, and stake footpath can Different.

3. convex four axle stirring concrete earth according to claim 1 plants stake enclosure wall, it is characterized in that：Described suitable water In soil stake overlapping mode, the overlap joint between each width mixing pile can be for set one hole overlap joint it is also possible to press in relevant art specification The lap of splice of regulation is overlapped；Need in every width to implant the lap of splice between two cement mixing methods of h pile To facilitate implantation pile body to be advisable.

4. convex four axle stirring concrete earth according to claim 1 plants stake enclosure wall, it is characterized in that：Described prefabricated I shape Concrete-pile, by conditions such as excavation of foundation pit depth size, rational selection pile body size.

5. convex four axle stirring concrete earth according to claim 1 plants stake enclosure wall, it is characterized in that：Described cement mixing Stake interplantation plug (steel pipe, deal pile, mao bamboon stake etc.) its length and quantity are determined by the relevant requirement that foundation pit enclosure structure deforms.

All employing equivalents or the technical scheme of equivalent transformation formation, all fall within the scope of protection of present invention.