CN217998134U

CN217998134U - Waterproof construction of pipe jacking and open caisson junction of open caisson that open caisson was piping lane node concurrently

Info

Publication number: CN217998134U
Application number: CN202222257917.2U
Authority: CN
Inventors: 叶其彬; 李建伟; 郑建东; 陈大汉; 张一龙; 吴海泉; 郑志洪; 毛仲鹏; 林剑; 邹明阳
Original assignee: Xiamen Municipal Engineering Design Institute Co ltd
Current assignee: Xiamen Municipal Engineering Design Institute Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-12-09
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses a sunk well is simultaneously as push pipe of piping lane node and waterproof construction of sunk well junction, it includes: the open caisson is provided with a preformed hole on the well wall, a jacking pipe is inserted into the preformed hole, the jacking pipe is divided into an inward extending section positioned in the open caisson, a preformed section positioned in the preformed hole and an outward extending section positioned outside the open caisson, a micro-expansion concrete layer filled between the inner wall of the preformed hole and the outer wall of the preformed section, a grouting pipe embedded in the micro-expansion concrete layer, a water-swelling rubber ring sleeved on the inward extending section for plugging the open caisson and a joint between the micro-expansion concrete layer and the jacking pipe, an encapsulating concrete layer poured between the inner wall of the open caisson and the outer wall of the inward extending section and covering the water-swelling rubber ring, and a water-resisting layer poured between the outer wall of the outward extending section and the outer wall of the open caisson through the grouting pipe. The utility model discloses simple structure sets up multiple protection inside and outside the open caisson, and water-proof effects is good, and easily is under construction.

Description

Waterproof construction of pipe jacking and open caisson junction that open caisson was used as piping lane node concurrently

Technical Field

The utility model relates to a piping lane technical field, in particular to sunk well is simultaneously as the push pipe of piping lane node and the waterproof construction of sunk well junction.

Background

With the continuous development of economy, the development and utilization of urban underground space in China enter a new development period, particularly the continuous integration of overground and underground pipelines, and the construction of a comprehensive pipe gallery is particularly important for urban human-living environment and overall landscape. The construction of the comprehensive pipe gallery generally adopts open excavation method construction, shallow buried excavation method construction and pipe jacking method construction under foundation pit support, wherein the pipe jacking method construction is used as a non-excavation technology, so that road surface excavation can be reduced, and the construction method has a particularly obvious advantage of reducing influences on surrounding buildings and traffic. The open caisson is required to be arranged at the initial end and the receiving end of the jacking pipe during jacking construction, the open caisson is only used as a temporary structure during jacking of the jacking pipe, and the top of the jacking pipe is backfilled after the top of the jacking pipe is finished in a cast-in-place pipe gallery body or a cast-in-place node in the open caisson, so that engineering waste is caused. When considering the open caisson as a permanent pipe gallery node, how to do the waterproof treatment of the joint of the jacking pipe and the open caisson needs to be researched, so that the water seepage in the subsequent open caisson structure is avoided, and the difficulty is brought to the operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, easily construction and the open caisson that water-proof effects is good do the push pipe of piping lane node concurrently with the waterproof construction of open caisson junction.

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a sunk well is as pipe jacking of piping lane node and waterproof construction of sunk well junction concurrently, it includes: the caisson comprises a caisson, a jacking pipe, a micro-expansion concrete layer, an injection pipe, a water-swelling rubber ring, an encapsulation concrete layer and a water-resisting layer, wherein a preformed hole for jacking pipe construction is formed in the wall of the caisson, the jacking pipe is inserted into the preformed hole and comprises an inner extension section located in the caisson, a preformed section located in the preformed hole and an outer extension section located outside the caisson, the micro-expansion concrete layer is filled in a gap between the inner wall of the preformed hole and the outer wall of the preformed section, the injection pipe is pre-embedded in the micro-expansion concrete layer, the injection pipe is provided with a slurry inlet extending into the caisson and a slurry outlet extending out of the caisson, the water-swelling rubber ring is sleeved on the inner extension section and seals the gap between the caisson, the micro-expansion concrete layer and the jacking pipe, the encapsulation concrete layer is poured between the inner wall of the caisson and the outer wall of the caisson through the injection pipe and covers the water-resisting expansion rubber ring.

Preferably, four grouting pipes are arranged and are respectively positioned above, below and on the left and right sides of the top pipe.

Preferably, the grouting pipe is a steel pipe with the diameter of 5cm and the length of 1.5m.

Preferably, the grout inlet of the grouting pipe extends out of the encapsulation concrete layer.

Preferably, the bonding surface of the combination of the inner wall of the open caisson and the encapsulating concrete layer is a roughened surface subjected to roughening treatment.

Preferably, the width of the encapsulated concrete layer is 50cm, and the thickness is 30cm.

Preferably, the water-swelling rubber ring is provided with two, wherein one water-swelling rubber ring blocks the joint between the open caisson and the micro-swelling concrete layer, and the other water-swelling rubber ring blocks the joint between the micro-swelling concrete layer and the top pipe.

Preferably, the concrete strength grade of the micro-expansion concrete layer is consistent with that of the open caisson wall.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: the utility model discloses simple structure, it adopts micro-expansion concrete layer to carry out the shutoff to the gap between open caisson preformed hole and the push pipe, adopt water-swelling rubber circle and the joint seam of encapsulating concrete layer from the inboard shutoff open caisson of open caisson, between micro-expansion concrete layer and the push pipe, and through at the pre-buried slip casting pipe in micro-expansion concrete layer, make can follow the open caisson inside to carry out the slip casting outside the open caisson and form the shutoff open caisson, the water barrier of joint seam between micro-expansion concrete layer and the push pipe, in order further to carry out waterproofly from the open caisson outside, realize the inside and outside multiple water protection of open caisson, guarantee the non-seepage, and easily be under construction.

Drawings

Fig. 1 is a schematic cross-sectional view of a joint between an open caisson and a jacking pipe according to a preferred embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

Fig. 3 is a schematic front view of a preferred embodiment of the present invention.

Wherein: 10. the open caisson comprises a sunk well, 11 parts of a reserved hole, 20 parts of a top pipe, 21 parts of an inward extending section, 22 parts of a reserved section, 23 parts of an outward extending section, 30 parts of a micro-expansion concrete layer, 40 parts of a grouting pipe, 41 parts of a grout inlet, 42 parts of a grout outlet, 50 parts of a water-expansion rubber ring, 60 parts of an encapsulation concrete layer and 70 parts of a water-resisting layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1 to 3, the waterproof structure of the joint between the top pipe and the open caisson, in which the open caisson is also used as the pipe gallery node, of the embodiment includes: the caisson structure comprises an open caisson 10, a jacking pipe 20, a micro-expansion concrete layer 30, an injection pipe 40, a water-expansion rubber ring 50, an encapsulation concrete layer 60 and a water-resisting layer 70, wherein a preformed hole 11 for construction of the jacking pipe 20 is formed in the wall of the open caisson 10, the jacking pipe 20 is inserted in the preformed hole 11 and is divided into an inner extension section 21 located in the open caisson 10, a reserved section 22 located in the preformed hole 11 and an outer extension section 23 located outside the open caisson 10, the micro-expansion concrete layer 30 is filled in a gap between the inner wall of the preformed hole 11 and the outer wall of the reserved section 22 of the jacking pipe 20, the injection pipe 40 is embedded in the micro-expansion concrete layer 30, a grouting opening 41 of the injection pipe 40 extends into the open caisson 10, a grouting opening 42 of the injection pipe 40 extends out of the open caisson 10, and a circle of the outer wall of the outer extension section 23 of the jacking pipe 20 and the outer wall of the open caisson 10 is poured through the injection pipe 40 to combine the outer wall of the open caisson 23 and the outer wall of the open caisson 10 and plug the gap between the open caisson 10 and the water-resisting layer 70. The inner extending section 21 of the top pipe 20 is sleeved with a water-swelling rubber ring 50 for sealing the joint between the caisson 10, the micro-swelling concrete layer 30 and the top pipe 20, a circle of encapsulating concrete layer 60 is poured between the outer wall of the inner extending section 21 of the top pipe 20 and the inner wall of the caisson 10, and the encapsulating concrete layer 60 covers the water-swelling rubber ring 50 and is combined with the outer wall of the inner extending section 21 and the inner wall of the caisson 10.

In this embodiment, while the micro-expansion concrete layer 30 is used to block the gap between the preformed hole 11 and the top pipe 20, the water-expansion rubber ring 50, the encapsulating concrete layer 60 and the water-resisting layer 70 are also used to block the joints between the top pipe 20, the micro-expansion concrete layer 30 and the open caisson 10 from the inner side and the outer side of the open caisson 10, so as to realize multiple water-proofing inside and outside the open caisson 10 and ensure that the joint between the top pipe 20 and the open caisson 10 does not leak. In addition, this embodiment is through pre-buried slip casting pipe 40 for can follow the open caisson 10 inboard and carry out the slip casting operation to the open caisson 10 outside and form water barrier 70, it is more convenient to make to set up water barrier 70 in the open caisson 10 outside, and has reduced the construction degree of difficulty.

Specifically, four grouting pipes 40 are provided in the present embodiment, and the four grouting pipes 40 are respectively located above, below, and on the left and right sides of the top pipe 20. The slip casting pipe 40 is a steel pipe having a diameter of 5cm and a length of 15 m.

In order to firmly combine the encapsulating concrete layer 60 with the open caisson 10, before the encapsulating concrete layer 60 is poured, the inner wall of the open caisson 10 is roughened, so that the combining surface of the open caisson 10 and the encapsulating concrete 60 becomes a rough surface, and the bonding force between the post-poured encapsulating concrete layer 60 and the inner wall of the open caisson 10 is increased. The encapsulated concrete layer 60 of this embodiment has a casting width a of 50cm and a thickness b of 30cm.

The water-swelling rubber ring 50 of the embodiment is provided with two water-swelling rubber rings, wherein one water-swelling rubber ring 50 blocks the joint between the open caisson 10 and the micro-swelling concrete layer 30, and the other water-swelling rubber ring 50 blocks the joint between the micro-swelling concrete layer 30 and the top pipe 20.

The concrete strength grade of the micro-expansion concrete layer 30 of the embodiment is consistent with that of the well wall of the open caisson 10, so as to avoid influencing the stress of the structure.

The present invention will be further described with reference to the preferred construction method of the embodiment, after the construction of the open caisson 10 and the pipe jacking 20 in the previous stage, the following steps are performed:

s1: filling micro-expansion concrete

Filling micro-expansion concrete in a gap between the inner wall of the reserved hole 11 of the open caisson 10 and the outer wall of the reserved section 22 of the jacking pipe 20 to form a micro-expansion concrete layer 30, and embedding a grouting pipe 40.

S2: encapsulated concrete placement

After the micro-expansion concrete is solidified, the water-expansion rubber ring 50 is sleeved on the inner extension section 21 of the top pipe 20, then the encapsulated concrete is poured to form an encapsulated concrete layer 60, and the grout inlet 41 of the grouting pipe 40 is ensured to extend out of the encapsulated concrete layer 60 so as not to influence the pouring of the waterproof layer 70.

S3: grouting reinforcement

And after the encapsulated concrete layer 60 reaches the designed strength, grouting and reinforcing the soil layer around the top pipe 20 outside the open caisson 10 through the reserved grouting pipe 40 to form a water-resisting layer 70.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a sunk well is as push pipe and sunk well waterproof construction of junction of piping lane node concurrently, a serial communication port, includes:

the open caisson structure comprises an open caisson (10), a reserved hole (11) for construction of a jacking pipe (20) is formed in the wall of the open caisson;

the jacking pipe (20) is inserted into the preformed hole (11) and is divided into an inward extending section (21) positioned in the open caisson (10), a preformed section (22) positioned in the preformed hole (11) and an outward extending section (23) positioned outside the open caisson (10);

the micro-expansion concrete layer (30) is filled in a gap between the inner wall of the reserved hole (11) and the outer wall of the reserved section (22);

the grouting pipe (40) is pre-embedded in the micro-expansion concrete layer (30) and is provided with a grout inlet (41) extending into the open caisson (10) and a grout outlet (42) extending out of the open caisson (10);

the water-swelling rubber ring (50) is sleeved on the inward extending section (21) and seals the joint among the open caisson (10), the micro-swelling concrete layer (30) and the top pipe (20);

the encapsulating concrete layer (60) is poured between the inner wall of the open caisson (10) and the outer wall of the inward extending section (21) and covers the water-swelling rubber ring (50);

and the water-resisting layer (70) is poured between the outer wall of the overhanging section (23) and the outer wall of the open caisson (10) through the grouting pipe (40).

2. The waterproof structure of the joint of the top pipe and the caisson, which also serves as a pipe gallery node, of the caisson according to claim 1, wherein four grouting pipes (40) are arranged and are respectively positioned above, below, on the left side and on the right side of the top pipe (20).

3. The caisson is used as a waterproof structure of the joint of the jacking pipe and the caisson of the pipe gallery node according to claim 2, wherein the grouting pipe (40) is a steel pipe with the diameter of 5 cm.

4. The waterproof structure of the joint of the pipe jacking pipe and the caisson which is also used as the pipe gallery node according to claim 3, wherein the length of the grouting pipe (40) is 1.5m.

5. The waterproof structure of the joint of the top pipe and the open caisson which is also used as a pipe gallery node according to any one of claims 1 to 4, characterized in that a grout inlet (41) of the grouting pipe (40) extends out of the encapsulation concrete layer (60).

6. The waterproof structure of the joint of the pipe jacking and the caisson which is also used as the pipe gallery node according to claim 1, wherein the joint surface of the inner wall of the caisson (10) and the encapsulating concrete layer (60) is a roughened surface which is subjected to roughening treatment.

7. The waterproof structure of the joint of the jacking pipe and the sinking well which is also used as the pipe gallery node according to claim 1, wherein the width of the encapsulating concrete layer (60) is 50cm, and the thickness is 30cm.

8. The waterproof structure of the joint of the top pipe and the caisson used as the pipe gallery node of claim 1, wherein two water-swellable rubber rings (50) are arranged, one of the two water-swellable rubber rings (50) blocks the joint between the caisson (10) and the micro-swellable concrete layer (30), and the other water-swellable rubber ring (50) blocks the joint between the micro-swellable concrete layer (30) and the top pipe (20).

9. The waterproof structure of the joint of the pipe jacking pipe and the caisson which is also used as the pipe gallery node according to claim 1, wherein the concrete strength grade of the micro-expansion concrete layer (30) is consistent with that of the wall of the caisson (10).