CN214362621U

CN214362621U - Structure is widened to active service highway pile type stock foam light soil

Info

Publication number: CN214362621U
Application number: CN202023184600.8U
Authority: CN
Inventors: 陶世刚; 彭学东; 张亚平; 罗欢; 杨攀科
Original assignee: Sichuan Communications Construction Group Co Ltd
Current assignee: Sichuan Communications Construction Group Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-10-08
Anticipated expiration: 2030-12-25

Abstract

The utility model relates to an existing labour highway pile type stock foam light soil broadens structure, include: the method comprises the following steps of firstly, constructing an original roadbed, a widened roadbed, anchor rods, small-diameter steel pipe piles, a bearing platform and a prefabricated panel; widening an original roadbed to form a widened roadbed, paving bottom geocell at the bottom of the widened roadbed, paving middle geocell at the middle of the widened roadbed, paving an anti-seepage geomembrane and a steel wire mesh at the upper part of the widened roadbed, filling foam light soil in the widened roadbed, and paving prefabricated panels on the side slopes of the widened roadbed; the steps are built on the original roadbed slope, anchor rods are embedded into the steps, and steel wire grid nets are arranged on the steps. The utility model has the advantages that: the small-diameter steel pipe piles are arranged at the bottoms of the steps and the widened roadbed, so that the uneven settlement of the widened roadbed can be effectively reduced; the anchor rod is buried in original roadbed slope to lay steel wire grid net, the joint strength at old and new roadbed concatenation position can be multiplicable, prevent that the roadbed from along the slip destruction of faying face.

Description

Structure is widened to active service highway pile type stock foam light soil

Technical Field

The utility model relates to a roadbed structure is widened to highway, in particular to structure is widened to on-the-spot efficiency of construction high, the road bed wholeness is better, the less active service highway pile-supported stock foam light soil of uneven settlement belongs to the civil engineering field, is applicable to the highway and widens the engineering.

Background

The widening project of the highway is a complex system consisting of original foundations, basically finished foundations after consolidation, newly filled foundations, road surfaces and the like, and because of the sensitivity of the new and old foundations to differential settlement, the control on the differential settlement deformation is far higher than the requirement on a common embankment. At present, most of the evaluation of treatment measures for the old and new roadbeds is carried out through field tests and experience of designers, so that the tensile fracture of the old and new roadbeds is easy to generate, longitudinal cracks are generated on the road surface, the splicing parts of the old and new roadbeds are weak links of the roadbeds, and the sliding damage of the roadbeds along the joint surface can be generated. Therefore, how to take measures to control the differential settlement of the new and old roadbed, and the strengthening of the connection strength of the splicing parts of the new and old roadbed is a key problem in design and construction.

In view of this, in order to improve the connection strength of the spliced parts of the new and old roadbeds and control the differential settlement of the new and old roadbeds, the invention of the expanded structure of the pile-supported anchor rod foamed lightweight soil for the active highway, which has high field construction efficiency, better integrity of the roadbeds and smaller uneven settlement, is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the prior art, providing a road bed wholeness is better, inhomogeneous settlement less active service highway pile type stock foam light soil widens the structure.

The pile-supported anchor rod foamed light soil widening structure for the active expressway comprises an original roadbed, a widened roadbed, anchor rods, small-diameter steel pipe piles, a bearing platform and prefabricated panels; widening an original roadbed to form a widened roadbed, paving bottom geocell at the bottom of the widened roadbed, paving middle geocell at the middle of the widened roadbed, paving an anti-seepage geomembrane and a steel wire mesh at the upper part of the widened roadbed, filling foam light soil in the widened roadbed, and paving prefabricated panels on the side slopes of the widened roadbed; building steps on the original roadbed slope, embedding anchor rods into the steps, laying a steel wire grid net on the steps, anchoring the anchor rods on the steel wire grid net through anchor rod connecting pieces, connecting one end of each anchor rod with the original roadbed, and connecting the other end of each anchor rod with foamed light soil; and small-diameter steel pipe piles are arranged at the bottoms of the steps and the widened roadbed, and a bearing platform is poured at the top of the small-diameter steel pipe pile at the bottom of the widened roadbed.

Preferably, the method comprises the following steps: the anchor rod connecting piece comprises a base plate and an anchor rod fixing clamp, wherein the base plate is positioned between the steel wire grating net and the anchor rod fixing clamp.

Preferably, the method comprises the following steps: and a gravel cushion is laid on the bearing platform.

Preferably, the method comprises the following steps: pouring of foam light soil adopts integral template, and vertical braces, horizontal brace and bracing are connected respectively through the connecting plate outside the integral template, and vertical braces, horizontal brace and bracing are connected and are constituteed the support frame structure, and horizontal brace and bracing all are connected to the pre-buried shaped steel pole setting on ground.

Preferably, the method comprises the following steps: widen the minor diameter steel-pipe pile upper portion of road bed bottom and set up the steel-pipe pile and enlarge the end, the steel-pipe pile enlarges the end and passes through split bolt with the minor diameter steel-pipe pile and be connected, inside the steel-pipe pile enlarges the end and is located the cushion cap, it is whole with the connection steel pipe to link through U shaped steel tubular pile end fixture between the adjacent steel-pipe pile enlarges the end, U shaped steel tubular pile end fixture sets up in steel-pipe pile enlarges the end both ends, it connects between adjacent U shaped steel tubular pile end fixture to connect the steel pipe.

Preferably, the method comprises the following steps: widen the road bed bottom and be equipped with the escape canal.

The utility model has the advantages that:

(1) the utility model discloses set up minor diameter steel-pipe pile bottom step bottom and widening the road bed, minor diameter steel-pipe pile stretches into the cushion cap part and sets up the steel-pipe pile and enlarge the end, and the parallel integration is whole, can effectively reduce the differential settlement who widens the road bed.

(2) The utility model discloses the stock is buried in original road bed side slope to lay steel wire grid net, original road bed is connected to stock one end, and foam light soil is connected to the other end, and the joint strength at multiplicable new and old road bed concatenation position prevents that the road bed from destroying along the slip of faying face.

Drawings

FIG. 1 is a schematic view of the pile anchor rod foam light soil widening structure of the present invention;

fig. 2 is a schematic view of the anchor rod end anchoring of the present invention;

fig. 3 is a schematic diagram of the pile anchor rod foam light soil widening structural template of the utility model;

fig. 4 is a schematic view of the enlarged end of the small-diameter steel pipe pile of the present invention.

Description of reference numerals: 1-original roadbed, 2-pavement layer, 3-step, 4-anchor rod, 5-small diameter steel pipe pile, 6-bearing platform, 7-drainage ditch, 8-broken stone cushion layer, 9-bottom geocell, 10-middle geocell, 11-impervious geomembrane, 12-steel wire mesh, 13-prefabricated panel and 14-foamed light soil, 15-anchor rod connecting piece, 16-steel wire grid net, 17-backing plate, 18-anchor rod fixing clamp, 19-integral template, 20-vertical support, 21-horizontal support, 22-diagonal support, 23-section steel upright rod, 24-steel pipe pile enlarged end, 25-split bolt, 26-U-shaped steel pipe pile end clamp, 27-connecting steel pipe and 28-connecting plate.

Detailed Description

The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

As an embodiment, fig. 1 is the utility model discloses the structural schematic is widened to pile type stock foam light soil, and fig. 2 is the utility model discloses stock tip anchor schematic. Pile type anchor rod foam light soil widening structure comprises an original roadbed 1, a pavement layer 2, a widened roadbed, anchor rods 4, small-diameter steel pipe piles 5, a bearing platform 6, a prefabricated panel 13 and a drainage ditch 7. A pavement layer 2 is arranged above the original roadbed 1. The original roadbed 1 is widened to form a widened roadbed, bottom geocell 9 is laid at the bottom of the widened roadbed, middle geocell 10 is laid at the middle of the widened roadbed, HDPE anti-seepage geomembrane 11 and steel wire meshes 12 are laid at the upper part of the widened roadbed, and the geocell adopts a two-way stretching one-step forming plastic geocell. The widened roadbed is filled with foam light soil 14, the widened roadbed slope is paved with prefabricated panels 13, the prefabricated panels 13 are prefabricated on site by C25 pebble concrete, and the panels are constructed by M7.5 cement mortar staggered joints. And a drainage ditch 7 is arranged at the bottom end of the widened roadbed.

And (3) building steps on the side slope of the original roadbed 1, wherein the width of each step is 1-2m, and the bottom surface of each step inclines 2-4% towards the road. And small-diameter steel pipe piles 5 are arranged at the bottoms of the steps 3 and the widened roadbed, the pile diameters of the small-diameter steel pipe piles 5 are 140mm, the pile lengths are 9 m, a bearing platform 6 is poured at the top of the small-diameter steel pipe pile 5 at the bottom of the widened roadbed, a 20-50mm gravel cushion layer 8 is laid, and a bottom geocell 9 is laid on the gravel cushion layer 8.

An anchor rod 4 is embedded in the step 3, a phi 22 cement mortar anchor rod is adopted as the anchor rod 4, a steel wire grid net 16 is arranged on the step 3, and the anchor rod 4 is anchored on the steel wire grid net 16 through an anchor rod connecting piece 15. The anchor rod connection 15 comprises a backing plate 17 and an anchor rod holding clamp 18, wherein the backing plate 17 is located between the steel wire grating 16 and the anchor rod holding clamp 18. The anchor rods 4 have about 2/3 of length to enter the original roadbed 1, and the rest enters the foam light soil 14.

Fig. 3 is the utility model discloses structural template schematic is widened to pile type stock foam light soil, and foam light soil 14 is pour and is adopted integral template 19, and integral template 19 is outer through connecting plate 28 respectively welded connection vertical braces 20, horizontal brace 21, bracing 22, and vertical braces 20, horizontal brace 21 and bracing 22 connect to form supporting frame structure, and horizontal brace 21 and bracing 22 all are connected to shaped steel pole setting 23, and shaped steel pole setting 23 is pre-buried on ground.

Fig. 4 is the utility model discloses small diameter steel-pipe pile enlarges end schematic diagram, widen 5 upper portions of small diameter steel-pipe pile 5 of road bed bottom and set up the steel-pipe pile and enlarge end 24, the steel-pipe pile enlarges end 24 and is connected through split bolt 25 with small diameter steel-pipe pile 5, the steel-pipe pile enlarges end 24 and is located 6 insides of cushion cap, adjacent steel-pipe pile enlarges and is linked into wholly through U shaped steel tubular pile end fixture 26 and connecting steel pipe 27 between the end 24, can strengthen small diameter steel-

pipe pile

5 and 6 joint strength of cushion cap. The U-shaped steel pipe pile end clamps 26 are arranged at two ends of the steel pipe pile enlarged end 24, and the connecting steel pipes 27 are connected between the adjacent U-shaped steel pipe pile end clamps 26.

Claims

1. The utility model provides a structure is widened to active service highway pile type stock foam light soil, its characterized in that: the method comprises the steps of forming an original roadbed (1), a widened roadbed, anchor rods (4), small-diameter steel pipe piles (5), a bearing platform (6) and a prefabricated panel (13); widening an original roadbed (1) to form a widened roadbed, paving bottom geocell chambers (9) at the bottom of the widened roadbed, paving middle geocell chambers (10) in the middle of the widened roadbed, paving anti-seepage geomembrane (11) and steel wire meshes (12) at the upper part of the widened roadbed, filling foam light soil (14) in the widened roadbed, and paving prefabricated panels (13) on the side slopes of the widened roadbed; building steps (3) on the side slope of the original roadbed (1), embedding anchor rods (4) into the steps (3), laying a steel wire grid net (16) on the steps (3), anchoring the anchor rods (4) on the steel wire grid net (16) through anchor rod connecting pieces (15), connecting one end of each anchor rod (4) with the original roadbed (1), and connecting the other end of each anchor rod with foamed light soil (14); step (3) bottom and widen the road bed bottom and set up minor diameter steel-pipe pile (5), widen the minor diameter steel-pipe pile (5) top of road bed bottom and pour cushion cap (6).

2. The active highway pile-bearing anchor rod foamed lightweight soil widening structure according to claim 1, wherein the active highway pile-bearing anchor rod foamed lightweight soil widening structure comprises: the anchor rod connecting piece (15) comprises a backing plate (17) and an anchor rod fixing clamp (18), wherein the backing plate (17) is positioned between the steel wire grating net (16) and the anchor rod fixing clamp (18).

3. The active highway pile-bearing anchor rod foamed lightweight soil widening structure according to claim 1, wherein the active highway pile-bearing anchor rod foamed lightweight soil widening structure comprises: and a gravel cushion layer (8) is paved on the bearing platform (6).

4. The active highway pile-bearing anchor rod foamed lightweight soil widening structure according to claim 1, wherein the active highway pile-bearing anchor rod foamed lightweight soil widening structure comprises: pouring of foam light soil (14) adopts integral template (19), and vertical braces (20), horizontal braces (21) and bracing (22) are connected respectively through connecting plate (28) outward in integral template (19), and vertical braces (20), horizontal braces (21) and bracing (22) are connected and are constituteed the support frame structure, and horizontal braces (21) and bracing (22) all are connected to pre-buried shaped steel pole setting (23) on ground.

5. The active highway pile-bearing anchor rod foamed lightweight soil widening structure according to claim 1, wherein the active highway pile-bearing anchor rod foamed lightweight soil widening structure comprises: the steel pipe pile expanding end socket (24) is arranged on the upper portion of the small-diameter steel pipe pile (5) at the bottom of the widened roadbed, the steel pipe pile expanding end socket (24) is connected with the small-diameter steel pipe pile (5) through a split bolt (25), the steel pipe pile expanding end socket (24) is located inside a bearing platform (6), adjacent steel pipe pile expanding end sockets (24) are connected into a whole with connecting steel pipes (27) through U-shaped steel pipe pile end socket clamping devices (26), the U-shaped steel pipe pile end socket clamping devices (26) are arranged at two ends of the steel pipe pile expanding end socket (24), and the connecting steel pipes (27) are connected between the adjacent U-shaped steel pipe pile end socket clamping devices (26).

6. The active highway pile-bearing anchor rod foamed lightweight soil widening structure according to claim 1, wherein the active highway pile-bearing anchor rod foamed lightweight soil widening structure comprises: and a drainage ditch (7) is arranged at the bottom end of the widened roadbed.