阅读说明：本技术 一种薄壁轻钢结构钢桩条形基础复合地基技术 (Thin-wall light steel structure steel pile strip foundation composite foundation technology ) 是由 徐成 柏文峰 王云 于 2018-08-16 设计创作，主要内容包括：本发明涉及一种薄壁轻钢结构钢桩条形基础复合地基技术,属于建筑工程技术领域。本发明要解决的技术问题是在混凝土墙下条形基础可以满足或部分满足建筑荷载要求的情况下,补充螺旋钢桩基础控制建筑物沉降并提供一部分地基承载力。提供一种在非均匀土层下的复合地基解决方案,解决既有装配式薄壁轻钢结构在非均匀土层或软体土层的基础承载力及沉降控制问题,为结构安全性及施工便捷性提供了新的解决方案。(The invention relates to a thin-wall light steel structure steel pile strip foundation composite foundation technology, and belongs to the technical field of constructional engineering. The invention aims to solve the technical problem that under the condition that a strip foundation under a concrete wall can meet or partially meet the building load requirement, a spiral steel pile foundation is supplemented to control the building settlement and provide a part of foundation bearing capacity. The composite foundation solution under the non-uniform soil layer is provided, the problems of the foundation bearing capacity and settlement control of the existing assembled thin-wall light steel structure on the non-uniform soil layer or the soft soil layer are solved, and a new solution is provided for the structural safety and the construction convenience.)

1. The utility model provides a thin wall lightweight steel construction steel pile bar basis composite foundation technique which characterized in that: the bearing capacity of foundation soil is greatly improved by combining the helical blade steel piles with the concrete wall lower strip foundation technology, the settlement of a building is controlled through the friction pile body, the problems of low bearing capacity, uneven settlement, high foundation cost and the like of a soil bearing layer of a soft soil natural shallow foundation are solved, the production construction efficiency is improved, and the earth outsourcing and construction period are reduced.

2. The thin-wall light steel structure steel pile strip foundation composite foundation technology of claim 1, characterized in that: the foundation adopts a helical blade steel pile foundation.

3. The thin-wall light steel structure steel pile strip foundation composite foundation technology of claim 1, characterized in that: and the steel pile and the lower strip foundation of the concrete wall are integrally cast to form a composite foundation whole.

4. The thin-wall light steel structure steel pile strip foundation composite foundation technology of claim 1, characterized in that: the pile body can be subjected to holing grouting reinforcement treatment according to the properties of foundation soil.

5. The thin-wall light steel structure steel pile strip foundation composite foundation technology of claim 1, characterized in that: besides the fabricated thin-wall light steel structure, the light wood structure, the bamboo structure and the light concrete structure can also adopt the construction method to improve the construction speed and reduce the construction cost.

Technical Field

The invention relates to a thin-wall light steel structure steel pile strip foundation composite foundation technology, and belongs to the technical field of constructional engineering.

Background

The assembled light steel structure foundation adopts a natural shallow foundation and is limited by the soil condition of a site, the single strip foundation under the wall can control the building load but is not suitable for controlling the overall settlement of the building, and the long-time overall settlement can cause the damage of the internal pipeline of the building and the cracking of the wall body, thereby influencing the normal use.

Disclosure of Invention

The invention aims to solve the technical problem that under the condition that a strip foundation under a concrete wall can meet or partially meet the building load requirement, a spiral steel pile foundation is supplemented to control the building settlement and provide a part of foundation bearing capacity. The composite foundation solution under the non-uniform soil layer is provided, the problems of the foundation bearing capacity and settlement control of the existing assembled thin-wall light steel structure on the non-uniform soil layer or the soft soil layer are solved, and a new solution is provided for the structural safety and the construction convenience.

The technical scheme of the invention is as follows:

thin-wall light steel structure steel pile strip foundation composite foundation technology

Step 1: carrying out steel pile positioning and punching construction work according to a drawing, wherein the pile length and the pile diameter are selected according to a design drawing;

step 2: after the steel pile is constructed to the designed depth, controlling the jacking flange plate to be at the designed elevation;

and step 3: excavating a strip foundation at the depth of 150mm below the height of the steel pile top mark;

and 4, step 4: pouring a 100mm plain concrete cushion layer;

and 5: binding the lower strip foundation reinforcing steel bars of the concrete wall according to a construction drawing;

step 6: performing mold sealing treatment on the strip-shaped foundation, and pouring concrete;

and 7: after the concrete foundation reaches the design strength, mounting an upper assembly type thin-wall light steel structure;

further optimization: the diameter, the length and the width of the helical blade steel pile can be adjusted according to the soil condition on site;

further optimization: the spiral blade steel pile can be punched, pressurized and grouted according to the soil condition;

further optimization: the bar foundation under the concrete wall can be optimally reinforced according to the project condition;

the invention has the beneficial effects that:

1) and the integrity is enhanced. The spiral blade steel pile reinforcing technology is adopted, namely a friction pile body is arranged in a soil layer, so that the friction coefficient is improved, the building settlement is better controlled, and the stability of the foundation settlement is enhanced;

2) and the basic bearing capacity is improved. By adopting the helical blade steel pile reinforcing technology and combining the concrete wall lower strip foundation, the bearing capacity of the comprehensive foundation is greatly improved;

3) and the economy is good. By adopting the steel pile strip foundation composite foundation technology, the section size of the concrete foundation can be greatly reduced, the earthwork excavation amount is small, the earthwork backfilling speed is high, the occupied area of the building foundation is obviously reduced, the energy and the land are saved, and the manufacturing cost is reduced;

4) the technology enriches the foundation form of the fabricated thin-wall light steel structure, so that the composite foundation can meet the requirement of rapid construction of fabricated buildings under various complex geological conditions.

Drawings

FIG. 1 is a schematic cross-sectional view of a thin-wall light steel structure steel pile strip foundation composite foundation;

in the figure: 1-spiral steel pile body; 2-pile top flange plate; 3-plain concrete cushion; 4-stressed steel bars; 5-bar-shaped foundation concrete; 6-light steel keel composite wall.

Detailed Description

The invention will be further described with reference to the following drawings and detailed description:

step 1: carrying out steel pile positioning and punching construction work according to a drawing, wherein the pile length and the pile diameter are selected according to a design drawing;

step 2: after the steel pile 1 is constructed to the designed depth, controlling the pile top flange 2 to be at the designed elevation;

and step 3: excavating a strip foundation at the depth of 150mm below the height of the steel pile top mark;

and 4, step 4: pouring a 100mm plain concrete cushion layer 3;

and 5: binding the lower strip foundation reinforcing steel bars 4 of the concrete wall according to a construction drawing;

step 6: performing mold sealing treatment on the strip foundation 5, and pouring concrete 5;

and 7: and after the concrete foundation reaches the design strength, mounting the upper assembly type thin-wall light steel structure 6.