CN201567566U

CN201567566U - Precast assembled prestress underground continuous wall

Info

Publication number: CN201567566U
Application number: CN2009202993206U
Authority: CN
Inventors: 牛刚; 丁飞
Original assignee: China Coal No 3 Construction Group Co Ltd
Current assignee: China Coal No 3 Construction Group Co Ltd
Priority date: 2009-12-16
Filing date: 2009-12-16
Publication date: 2010-09-01
Anticipated expiration: 2019-12-16

Abstract

The utility model discloses a precast assembled prestress underground continuous wall, the wall body of the underground continuous wall adopts sectional arrangement in the longitudinal direction, each section wall body is provided with through holes which can penetrate the wall body in longitudinal direction and anchor rod holes which can penetrate the wall body along thickness-direction in a reserved mode, and the through holes are disjointed with the anchor rod holes in the wall body. The through holes from top to the bottom of the wall body is provided with prestress reinforcing bars, and the anchor bar holes of each wall body are provided with anchor bars embedded into the soil layer of the wall body periphery so as to make the wall body and the soil layer at the periphery be fixed. The utility model can reduce the thickness of the wall body, reduce the amount of the steel reinforcing bars and the internal supports, and improve the integral rigidity and deformation resistance capability of the underground continuous wall.

Description

Prefabricated prestressing diaphragm wall

Technical field:

The utility model relates to a kind of prefabricated prestressing diaphragm wall.

Background technology:

In recent years; diaphragm wall is as one of retaining wall common type of deep foundation pit support; in Tall Building Foundation engineering, municipal underground construction, obtained using more widely; especially at soft foundation, city hive and the foundation ditch that need protect adjacent structure and underground utilities, block selecting fortifield village revetment headed by the diaphragm wall.The cast-in-place monolithic diaphragm wall of domestic and international more employing is as retaining wall, but along with the excavation of base pit engineering in recent years is more and more darker, even adopt thicker continuous underground wall structure section and excess arrangement of reinforcement, still excessive because of its distortion, and the road number is supported in the increase of having to, thereby not only increased difficulty of construction, cast-in-place monolithic diaphragm wall needs a large amount of extraordinary construction machineries in the time of construction simultaneously, and it is a lot of that this also makes construction costs increase.Prestressing technique is one of ten new technologies of current building field, and wide application prospect is arranged.This technology can be given full play to high strength cast iron and the high material property of concrete crushing strength, not only can save steel and concrete, and can improve structure function, solves the insoluble technical problem of other structural meterials.As in long span building, bridge and some unique constructions, prestressing technique all demonstrates great vitality.If prestressing technique is applied in the continuous underground wall structure, can improve the structural performance of diaphragm wall, reduce reinforcing bar, concrete amount, can play an important role to increasing economic efficiency.

The utility model content:

For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of prefabricated prestressing diaphragm wall, in the hope of the thickness that reduces body of wall, the quantity that reduces arrangement of reinforcement and inner support, and the integral rigidity and the non-deformability of raising diaphragm wall.

The utility model technical solution problem adopts following technical scheme:

Prefabricated prestressing diaphragm wall, the body of wall of the above diaphragm wall of longitudinal direction is by the segmented setting, be reserved with the through hole that vertically penetrates body of wall in each section body of wall and penetrate the bolthole of body of wall, and described through hole and described bolthole are non-intersect in body of wall along the thickness of wall body direction; In the through hole of all bodies of wall, be equipped with prestressed reinforcement from top to bottom, and in the bolthole of each section body of wall, be provided with anchor pole that the soil layer to the body of wall periphery is implanted into to make body of wall and peripheral soil layer fix in the horizontal direction.

Described anchor pole is made of the steel pipe of both ends open and the plastic pipe that is arranged in the steel pipe, and described plastic pipe inserts the end sealing in the soil layer, and the plastic pipe body is provided with a plurality of radial holes, and the end that described steel pipe does not insert soil layer is provided with flange.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the body of wall of the utility model diaphragm wall is vertically arranged with through hole, in through hole, penetrate prestressed reinforcement, and carry out prestressed stretch-draw on first section body of wall top, it is unified whole that each section body of wall is formed, this prestressed use, can reduce the quantity of thickness, minimizing arrangement of reinforcement and the inner support of body of wall, also can improve the integral rigidity and the non-deformability of whole space enclosing structure.

2, adopt the easier control of prefabricated form and check the quality of each section walls concrete, the folder mud, the uncompacted situation of vibrating that do not exist cast-in-place monolithic diaphragm wall often to occur.

3, when each section body of wall was installed, all the bolthole from body of wall drew the permanent anchor pole of concrete outside the figure of body of wall periphery layer is implanted into, and the diaphragm wall body of wall is played the effect of permanent fixation.After the inside subject structure is finished, during as generation earthquake or other strong loads, draw anchor pole can stop of the collision of continuous body of wall outward to agent structure, play the effect of protection agent structure.

Description of drawings:

Fig. 1 is the structural representation of the diaphragm wall body of wall of an elementary section of the utility model; Fig. 2 is waiting to dig the schematic diagram that the foundation ditch center is buried support column underground and excavated first section soil body in the construction sequence; Fig. 3 applies the schematic diagram of horizontal steel pipe support and diagonal brace for after first section body of wall is installed; Fig. 4 is for being implanted into the schematic diagram of anchor pole at first section body of wall and soil layer; Fig. 5 installs the schematic diagram of hound for after excavating second section soil body under first section body of wall; Fig. 6 is for installing the schematic diagram after second section body of wall and horizontal steel pipe thereof support; Fig. 7 is for being implanted into the schematic diagram of anchor pole at second section body of wall and soil layer thereof; Fig. 8 finish for excavation of foundation pit and diaphragm wall installed after signal; Fig. 9 is the schematic diagram after all supports of dismounting diaphragm wall; Figure 10 is the structural representation of anchor pole in the utility model; Figure 11 implants body of wall and the interior schematic diagram of soil layer for anchor pole; Figure 12 is trapped in the interior schematic diagram of soil layer for the steel pipe on the anchor pole takes out the back plastic pipe; Figure 13 is the structural representation during injection pressure concrete after coagulation in plastic pipe.

Number in the figure: 1 body of wall, the 1a through hole, the 1b bolthole, 2 anchor poles, the 2a steel pipe, the 2b plastic pipe, the 2c radial hole, the 2d flange, 3 support columns, 4 horizontal steel pipes support, and 5 steel enclose purlin, 6 diagonal braces, 7 concrete, 8 hounds.

Below pass through the specific embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

The specific embodiment:

Embodiment: in conjunction with Fig. 1,9, the prefabricated prestressing diaphragm wall of present embodiment, the body of wall 1 of the above diaphragm wall of longitudinal direction is by the segmented setting, be reserved with the through hole 1a that vertically penetrates body of wall in each section body of wall and penetrate the bolthole 1b of body of wall, and described through hole and described bolthole are non-intersect in body of wall along the thickness of wall body direction; In the through hole of all bodies of wall, be equipped with prestressed reinforcement from top to bottom, and in the bolthole of each section body of wall, be provided with the anchor pole 2 that the soil layer to the body of wall periphery is implanted into and fix to make body of wall and peripheral soil layer in the horizontal direction.

In conjunction with Figure 10-13, described anchor pole is made of the steel pipe 2a of both ends open and the plastic pipe 2b that is arranged in the steel pipe, plastic pipe inserts the end sealing in the soil layer, and the plastic pipe body is provided with a plurality of radial hole 2c, and the end that described steel pipe does not insert soil layer is provided with flange 2d.

In conjunction with Fig. 1-9, the job practices of the utility model prefabricated prestressing diaphragm wall comprises the steps:

1), at the prefabricated diaphragm wall body of wall 1 of terrestrial segment formula, prefabricatedly be used to be embedded in the steel pipe support column of waiting to dig the foundation ditch central point, be reserved with through hole 1a that vertically penetrates body of wall and the bolthole 1b that penetrates body of wall along the thickness of wall body direction in the described body of wall; Through hole and bolthole are non-intersect in body of wall;

2), implant steel pipe support column 3 waiting to dig the foundation ditch central point, the implantation depth of support column 3 is more than or equal to the degree of depth of waiting to dig foundation ditch;

3), first of excavation pit section soil body, first section body of wall is installed in the foundation ditch of excavation, horizontal steel pipe is set between support column 3 and described body of wall supports 4, described horizontal steel pipe support is provided with steel with the body of wall contact point and encloses purlin 5, and laterally between steel pipe support and the described support column diagonal brace 6 is being set;

4), the soil layer of bolthole to the body of wall periphery along body of wall is implanted into anchor pole 2 in foundation ditch, the not outstanding body of wall in the end of anchor pole, referring to Figure 10-13, anchor pole is made of the steel pipe 2a of both ends open and the plastic pipe 2b that is arranged in the steel pipe, described plastic pipe inserts the end sealing in the soil layer, and the plastic pipe body is provided with a plurality of radial hole 2c, and the end that steel pipe does not insert soil layer is provided with flange 2d;

5), after anchor pole 2 is implanted in the soil layer, 2a extracts with steel pipe, inject the early strength concrete 7 of pressurization in plastic pipe 2b, the pressurization concrete enters on every side in the soil layer by the extruding of plastic pipe body radial hole, and plastic pipe forms barbed crab-bolt body of wall is fixed on the soil layer behind the setting and hardening; In the concrete construction, the pressurization concrete is generally selected the pea gravel concreten of big water/binder ratio for use, and the microlith particle diameter is about 5mm, optional cut-off footpath 110mm of plastics caliber and above HDPE double-wall corrugated pipe, and bearing capacity is very good;

6), continue second section soil body of the foundation ditch of the mounted first section body of wall of excavation below, after second section soil excavation finishes, edge first section body of wall bottom is provided with hound 8 between the root of described support column, second section body of wall is installed then, and the through hole of second section body of wall is alignd with the through hole of first section body of wall, then set by step 3), 4), 5) the horizontal steel pipe of second section body of wall of described installation supports and the anchor pole and the injection concrete of second section body of wall;

7) excavation of foundation pit finish, the final stage body of wall and laterally steel pipe support and after anchor pole installs, in the through hole of all bodies of wall, penetrate prestressed reinforcement from top to bottom, the diameter of through hole is 2.5 times of prestressed reinforcement diameter, and carrying out prestressed stretch-draw on first section body of wall top, it is unified whole that each section body of wall is formed; Remove all horizontal steel pipe supports, diagonal brace, steel at last and enclose purlin and steel pipe support column, construction of diaphragm wall finishes.

Claims

1. prefabricated prestressing diaphragm wall, it is characterized in that, the body of wall of the above diaphragm wall of longitudinal direction is by the segmented setting, be reserved with the through hole that vertically penetrates body of wall in each section body of wall and penetrate the bolthole of body of wall, and described through hole and described bolthole are non-intersect in body of wall along the thickness of wall body direction; In the through hole of all bodies of wall, be equipped with prestressed reinforcement from top to bottom, and in the bolthole of each section body of wall, be provided with anchor pole that the soil layer to the body of wall periphery is implanted into to make body of wall and peripheral soil layer fix in the horizontal direction.

2. prefabricated prestressing diaphragm wall according to claim 1, it is characterized in that, described anchor pole is made of the steel pipe of both ends open and the plastic pipe that is arranged in the steel pipe, described plastic pipe inserts the end sealing in the soil layer, and the plastic pipe body is provided with a plurality of radial holes, and the end that described steel pipe does not insert soil layer is provided with flange.