CN214061590U

CN214061590U - Intensive obstacle pile group engineering bored concrete pile configuration structure

Info

Publication number: CN214061590U
Application number: CN202023108912.0U
Authority: CN
Inventors: 张秀川; 李卓文; 林佐江; 周予启; 贾子超; 刘凯旋; 张帅; 周金汉; 吕宁; 李乐
Original assignee: China Construction First Group Construction and Development Co Ltd
Current assignee: China Construction First Group Construction and Development Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-08-27
Anticipated expiration: 2030-12-22

Abstract

The utility model provides a dense obstacle pile crowd engineering bored concrete pile configuration structure, the single diameter of dense obstacle pile is no more than 1500mm, and the degree of depth is no more than 40m, bored concrete pile configuration structure includes optimizes back engineering pile, basic cushion cap and basic grade beam, the single diameter of engineering pile must be greater than after optimizing the single diameter of dense obstacle pile, through boring steel casing pipe in original dense obstacle pile position department, then the pile hole backfill, extract the mode of steel casing pipe, accomplish the construction of engineering pile after optimizing; the foundation ground beams are criss-cross, foundation bearing platforms are arranged at the crossed positions of the foundation ground beams, and 2-3 optimized engineering piles are arranged at the bottom of each foundation bearing platform. Through intensive obstacle pile crowd engineering bored concrete pile configuration structure has reduced and has need to extract obstacle pile quantity, has avoided the risk that hollow bored concrete pile construction pressure-bearing water gushed suddenly, practices thrift cost, construction speed is fast, efficient.

Description

Intensive obstacle pile group engineering bored concrete pile configuration structure

Technical Field

The utility model belongs to the technical field of the construction, in particular to intensive obstacle pile crowd engineering bored concrete pile configuration structure.

Background

Along with the high-speed development of economy and the acceleration of urbanization process, a lot of cities are changed from industrial economy to industrial economy, a lot of abandoned factory buildings and warehouses are left, city updating becomes an increasingly significant growth trend of the development of Chinese cities, and along with the rapid development of urban underground space development, rocks, left barrier piles and the like are frequently encountered in the underground engineering construction process, so that the engineering construction quality and progress are directly influenced.

When a dense obstacle pile group is encountered, the engineering pile is designed according to the traditional method shown in fig. 1, but the traditional engineering pile distribution needs to pull out more obstacle piles, so that the construction difficulty is high, the cost is high, and the efficiency is low.

Disclosure of Invention

For solving the big does of intensive obstacle stake crowd position engineering bored concrete pile construction degree of difficulty, the utility model aims at providing an intensive obstacle stake crowd engineering bored concrete pile configuration structure has reduced and has need to extract obstacle stake quantity, has avoided the risk that hollow bored concrete pile construction confined water gushed suddenly, practices thrift cost, construction speed is fast, efficient.

The utility model aims at realizing through the following technical scheme:

a dense barrier pile group engineering cast-in-place pile configuration structure is characterized in that the diameter of a single root of a dense barrier pile is not more than 1500mm, the depth of the dense barrier pile is not more than 40m, the cast-in-place pile configuration structure comprises an optimized engineering pile, a foundation cushion cap and a foundation ground beam, the diameter of the single root of the optimized engineering pile is larger than that of the dense barrier pile, and construction of the optimized engineering pile is completed in a mode that a steel sleeve is drilled at the position of the original dense barrier pile, then pile holes are backfilled, and the steel sleeve is pulled out; the foundation ground beams are criss-cross, foundation bearing platforms are arranged at the crossed positions of the foundation ground beams, and 2-3 optimized engineering piles are arranged at the bottom of each foundation bearing platform.

Further, the diameter of each optimized engineering pile is not less than 1000 mm.

Further, the basic bearing platform is divided into a triangular basic bearing platform and a rectangular basic bearing platform.

Further, the diameter of the optimized engineering pile expanded out of the foundation bearing platform is not less than 0.5 time.

Furthermore, the diameter of the steel sleeve is matched with the diameter of a single optimized engineering pile and is not less than 1000 mm.

The utility model discloses compare prior art's beneficial effect does:

the utility model discloses according to the specification and the distribution condition of intensive obstacle stake, optimize former design engineering stake, obtain intensive obstacle stake crowd engineering bored concrete pile configuration structure reduces the obstacle stake quantity that needs to extract, has avoided the risk that the bored concrete pile construction confined water gushes suddenly at the bottom of the pit, and is little to the disturbance of underground original state soil, does not have the influence to all ring edge borders, structures, energy-concerving and environment-protective.

Drawings

FIG. 1 is a schematic diagram of the distribution of engineering piles of an original design affected by dense obstacle pile groups;

fig. 2 is a schematic view of a configuration structure of a cast-in-place pile of the dense obstacle pile group project according to an embodiment of the present invention;

FIG. 3 is a sectional view of excavation and chiseling of earthwork and old and useless foundations on the upper part of a dense barrier pile group;

FIG. 4 is a cross-sectional view of a full slewing drilling machine for removing a barrier pile;

FIG. 5 is a cross-sectional view of an engineering pile after construction optimization of the drilling pile driver;

reference numerals: 1-dense obstacle piles, 2-original design engineering piles, 31-optimized engineering piles, 32-foundation bearing platforms, 33-foundation ground beams, 4-space enclosing structures, 51-excavators, 52-crushing guns, 61-full slewing drilling machines, 62-crawler cranes, 63-steel casings and 7-drilling type pile drivers.

Detailed Description

In order to make the technical means, innovative features, objectives and functions realized by the present invention easy to understand, the present invention will be further described below.

Example 1

As shown in fig. 2, the embodiment provides a dense barrier pile group engineering cast-in-place pile configuration structure, wherein a single diameter of a dense barrier pile 1 is 600mm, and a depth is 24m, wherein the cast-in-place pile configuration structure includes an optimized engineering pile 31, a foundation cushion cap 32 and a foundation ground beam 33, the single diameter of the optimized engineering pile is 1500mm, which is larger than the single diameter of the dense barrier pile by 600mm, a steel sleeve 63 is drilled into an original dense barrier pile position, and then pile holes are backfilled and the steel sleeve is pulled out, so as to complete construction of the optimized engineering pile; the foundation ground beams are criss-cross, foundation bearing platforms are arranged at the staggered positions of the foundation ground beams, 2-3 optimized engineering piles are arranged at the bottom of each foundation bearing platform, and the optimized engineering piles expanded from the foundation bearing platforms are not less than 750 mm. The optimized engineering pile is consistent with the node foundation center of the original design engineering pile 2 in the figure 1.

The construction method of the dense barrier pile group engineering cast-in-place pile configuration structure is characterized in that the dense barrier piles 1 are located below the ground and need to be excavated and then processed. The construction method comprises the following steps:

step 1, as shown in fig. 3, trial drilling is carried out on the ground by using a drill hole type pile driver 7, the top elevation of a dense obstacle pile 1 and the range of an obstacle area are determined, an excavator 51 and a crushing gun 52 are used for excavating and chiseling to reach the top elevation of the dense obstacle pile, the dense obstacle pile is positioned and returned to a picture, and a specification and distribution condition picture of the existing dense obstacle pile is obtained;

in the embodiment, the drilling pile driver adopts a positive circulation drilling machine GPS-15;

step 2, designing the position of the optimized engineering pile 31 according to the specification and the distribution condition of the dense barrier piles, as shown in fig. 2, and enabling the position of the optimized engineering pile to cover the original dense barrier piles;

step 3, as shown in fig. 4, carrying out measurement lofting according to the designed optimized pile position of the engineering pile, and installing a steel sleeve 63 at the set pile position by using a full slewing drilling machine 61 and a crawler crane 62, wherein the diameter of the steel sleeve is 1000 mm;

step 4, after the steel sleeve is drilled and pressed into the depth exceeding the depth of the original dense obstacle pile, breaking the pile by adopting a hydraulic grab bucket to take soil, pulling out the original dense obstacle pile and the steel sleeve, and backfilling pile holes at the same time;

and 5, constructing the optimized engineering pile by adopting a drilling pile driver as shown in FIG. 5.

The above-mentioned embodiments are merely to describe the preferred embodiments of the present invention, and are not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. A dense barrier pile group engineering cast-in-place pile configuration structure is characterized by comprising an optimized engineering pile (31), a foundation cushion cap (32) and a foundation ground beam (33), wherein the diameter of a single pile of the optimized engineering pile is larger than that of the dense barrier pile, a steel sleeve (63) is drilled at the position of the original dense barrier pile, and then pile holes are backfilled and the steel sleeve is pulled out, so that the construction of the optimized engineering pile is completed; the foundation ground beams are criss-cross, foundation bearing platforms are arranged at the crossed positions of the foundation ground beams, and 2-3 optimized engineering piles are arranged at the bottom of each foundation bearing platform.

2. The dense obstacle pile group engineering bored pile arrangement of claim 1, wherein a single diameter of the optimized engineering pile (31) is not less than 1000 mm.

3. The dense obstacle pile group engineering cast-in-place pile arrangement structure according to claim 1, wherein the foundation cap (32) is divided into a triangular foundation cap and a rectangular foundation cap.

4. The dense obstacle pile group engineering bored pile arrangement structure according to claim 1 or 3, wherein the base cap (32) is flared out to an optimized engineering pile (31) of not less than 0.5 times the optimized engineering pile diameter.

5. The dense obstacle pile group engineering cast-in-place pile configuration structure as claimed in claim 1, wherein the diameter of the steel sleeve (63) matches a single diameter of the optimized engineering pile (31), and is not less than 1000 mm.