CN201627590U

CN201627590U - Waterproof and grout stop device at the entrance of pipe jacking

Info

Publication number: CN201627590U
Application number: CN2010201666854U
Authority: CN
Inventors: 黄常波; 李钟�; 张可能; 钱洪福; 罗泽华; 邓美龙; 黎永索; 油新华; 朱军军; 丁海明; 彭环云; 杨仙; 许庆伟; 郝本峰
Original assignee: Central South University; China Construction Municipal Engineering Corp Ltd
Current assignee: Central South University; China Construction Communications Engineering Group Co Ltd
Priority date: 2010-04-22
Filing date: 2010-04-22
Publication date: 2010-11-10
Anticipated expiration: 2020-04-22

Abstract

A water-proof and slurry-stopping device at the entrance of a pipe jacking hole, which is fixedly connected to the well ring, on which a brush frame is fixed, and a well ring brush and an oil injection pipe are fixed on the inside of the brush frame; the well ring brush is circumferentially arranged between the pipe jacking and the Between the brush holders, the well ring brush is a ring-shaped interlayer structure composed of two layers of thin iron sheets inside and outside and the inner elastic steel wire. The brush body of the well ring brush is located at the wellhead, the brush body is bent toward the jacking pipe, and the brush head is close The outer wall of the pipe jacking, and to block the gap between the pipe jacking and the surrounding rock, the oil injection pipe is also fixed on the brush frame, the outlet of the oil injection pipe extends into the interlayer of the well circle brush, and the inner wall of the pipe jacking to the outer wall of the pipe is pierced with The grouting pipe, the outlet of the grouting pipe extends into the gap. Its advantage is that it has a good effect of stopping water and grouting, solves the problems of collapse and settlement during the pipe jacking construction process, and has an obvious effect of reducing the pressure of pipe jacking, without manual operation, saving time and effort.

Description

Waterproof grout-stopping device at jacking pipe entry portal

Technical field

The utility model relates to municipal waterproof construction field, and the hole waterproof in particularly a kind of pipe-jacking project is ended sizing device.

Background technology

Along with developing rapidly of China's municipal engineering, pipe-jacking project enters a fast-developing period.Several modes such as the job practices of domestic underground municipal engineering mainly contains that open cut, tunneling, lid are dug, shield structure and push pipe.Compare with other several worker's methods, construction by pipeline jacking method has obvious superiority, and its range of application more and more widely.Push pipe slip casting for reducing push pipe pressure, guarantees that the safety of jacking construction and surrounding enviroment has important effect as a key technology of pipe jacking method.

At present in municipal engineering and underground engineering field, particularly in the pipe jacking method engineering, the follow-up external diameter of pipe of push pipe guide external diameter of pipe is big, the outer space that exists of pipe in the push pipe process, when in weeping formation, carrying out jacking construction, underground water to walling crib mouth seepage, formed aquaporin from the space outside pipe, may cause accidents such as landslide.In order to reduce tube wall external friction resistance and filling tube wall outer void, often outside tube wall, inject bentonite slurry in the push pipe process, and bentonite slurry flows out from the push pipe outside easily, be unfavorable for that sealing ends slurry and drag reduction.

The utility model content

The purpose of this utility model provides a kind of waterproof grout-stopping device at jacking pipe entry portal, the technical problem of solve walling crib mouth sealing in the jacking construction process, ending slurry.

For achieving the above object, the utility model adopts following technical scheme.

This waterproof grout-stopping device at jacking pipe entry portal is fixedlyed connected with walling crib, it is characterized in that: be fixed with brush holder on the described walling crib, the brush holder inboard is fixed with walling crib brush and oil fuel tube; The walling crib brush ring is to being arranged between push pipe and the brush holder, the cast sandwich that the walling crib brush is made up of about two layers of thin iron plate and inner elastic wire, the brush body of walling crib brush is positioned at the well head place, brush body is adjacent to the outer wall of push pipe to push pipe bending, brush, and block space between push pipe and the country rock, and also being fixed with oil fuel tube on the brush holder, the outlet of oil fuel tube extends in the interlayer of walling crib brush, the inside pipe wall of push pipe is installed with Grouting Pipe to managing outer wall, and the outlet of Grouting Pipe extends in the space.

Described brush holder can be brushed by the bolt walling crib.

Described brush holder can be to be surrounded between cast overall structure steel plate that the push pipe periphery is provided with or each section to adopt welding or bolt connection.

Described brush holder can be steel plate or the steel bracket that segmentation is provided with.

The brush of described walling crib brush is a plagiocephaly, oblique being adjacent to of outer wall of it and push pipe, and the angle of inclination is less than 90 ° and greater than 0 °.

The utlity model has following characteristics and beneficial effect.

The utility model has been installed walling crib brush hole sealing device at the walling crib mouth in the push pipe process, and by grouting port injection colloid substance in the walling crib brush, after push pipe enters walling crib, in push pipe, inject drag reducer synchronously to the space by Grouting Pipe, compressing walling crib brush, make the walling crib brush be close to the push pipe external surface, thereby reach the purpose that the hole waterproof is ended slurry.This device has following some advantage.

(1), adopt this device can stop water from the space, to ooze out, avoid surface settlement, reduce the risk of surface collapse.

(2), in the long-distance pipe jacking process, to pipe is outer when injecting bentonite slurry, adopt this device can stop slurries from the space, to spill, raising slip casting drag-reduction effect.

(3), this device is installed after, need not manually-operated, time saving and energy saving, accelerate construction progress greatly.

(4), for big density push pipe, this device can reuse, cost is low, economic environmental protection.

Description of drawings

Fig. 1 is a structure elevational schematic view of the present utility model.

Fig. 2 is the structural representation of A-A section among Fig. 1.

Reference numeral: 1-walling crib brush, 1.1-tagger, 1.2-elastic wire, 2-brush holder, 3-bolt, 4-walling crib, 5-push pipe, 6-oil fuel tube, 7-Grouting Pipe, 8-space, 9-country rock.

The specific embodiment

Embodiment is referring to shown in Fig. 1-2, and this waterproof grout-stopping device at jacking pipe entry portal is fixedlyed connected with walling crib 4, it is characterized in that: be fixed with brush holder 2 on the described walling crib 4, brush holder 2 inboards are fixed with walling crib brush 1 and oil fuel tube 6 by bolt 3; Walling crib brush 1 is arranged circumferentially between push pipe 5 and brush holder 2, the cast sandwich that walling crib brush 1 is made up of about two layers of thin iron plate 1.1 and inner elastic wire 1.2, the brush body of walling crib brush 1 is positioned at the well head place, brush body is adjacent to the outer wall of push pipe 5 to push pipe bending, brush, and block space 8 between push pipe 5 and the country rock 9, also be fixed with oil fuel tube 6 on the brush holder 2, the outlet of oil fuel tube extends in the interlayer of walling crib brush, the inside pipe wall of push pipe 5 is installed with Grouting Pipe 7 to managing outer wall, and the outlet of Grouting Pipe 7 extends in the space 8.

Described brush holder 2 can be to be surrounded between cast overall structure steel plate that push pipe 5 peripheries are provided with or each section to adopt welding or bolt connection.Brush holder 2 also can be steel plate or the steel bracket that segmentation is provided with.

The brush of described walling crib brush 1 is a plagiocephaly, oblique being adjacent to of outer wall of it and push pipe 5,20 °～60 ° at angle of inclination.

A kind of job practices of using waterproof grout-stopping device at jacking pipe entry portal is characterized in that construction sequence is as follows.

Step 1, welding brush holder 2 on walling crib 4, walling crib brush 1 and oil fuel tube 6 is fixing with brush holder 2, walling crib brush 1 is arranged circumferentially between push pipe 5 and brush holder 2, the cast sandwich that walling crib brush 1 is made up of about two layers of thin iron plate 1.1 and inner elastic wire 1.2, the brush body of walling crib brush 1 is positioned at the well head place, and brush body is adjacent to the outer wall of push pipe 5 to push pipe bending, brush, and blocks the space 8 between push pipe 5 and the country rock 9.

Step 2, the outlet of oil fuel tube extend in the interlayer of walling crib brush, inject grease with oil fuel tube 6 in walling crib brush 1.

Step 3, the inside pipe wall of push pipe 5 is installed with Grouting Pipe 7 to managing outer wall, and the outlet of Grouting Pipe 7 extends in the space 8, injects gluey slurries with Grouting Pipe 7 in space 8, and described gluey slurries are dense bentonite slurries.

Claims

1. A waterproof and anti-slurry device at the entrance of the pipe jacking hole, which is fixedly connected with the well circle (4), characterized in that: the well circle (4) is fixed with a brush holder (2), and the inner side of the brush holder (2) is fixed There are well ring brushes (1) and oil injection pipes (6); the well ring brushes (1) are arranged circumferentially between the jacking pipe (5) and the brush holder (2), and the well ring brushes (1) are composed of two layers inside and outside A ring-shaped sandwich structure composed of thin iron sheets (1.1) and internal elastic steel wires (1.2), the brush body of the well ring brush (1) is located at the wellhead, the brush body is bent toward the jacking pipe, and the brush head is close to the jacking pipe (5) and block the gap (8) between the jacking pipe (5) and the surrounding rock (9). The oil injection pipe (6) is also fixed on the brush frame (2). The outlet of the oil injection pipe extends to the well circle brush In the interlayer, a grouting pipe (7) is pierced from the inner wall of the jacking pipe (5) to the outer wall of the pipe, and the outlet of the grouting pipe (7) extends into the gap (8).

2. The waterproof and anti-slurry device at the entrance of the pipe jacking hole according to claim 1, characterized in that: the brush holder (2) is fixed by bolts (3) to the well ring brush (1).

3. The waterproof and slurry-proof device for the entrance of the pipe jacking hole according to claim 2, characterized in that: the brush holder (2) is a ring-shaped integral structural steel plate arranged around the outer periphery of the pipe jacking (5) or one of each section The connections are welded or bolted.

4. The waterproof and anti-slip device for pipe jacking holes according to claim 2, characterized in that: the brush holder (2) is a steel plate or a steel bracket arranged in sections.

5. The waterproof and anti-slurry device at the entrance of the pipe jacking hole according to claim 2, characterized in that: the brush head of the well ring brush (1) is an oblique head, which sticks obliquely to the outer wall of the pipe jacking (5) Tight, the inclination angle is less than 90° and greater than 0°.