CN112302136A - Connecting structure of new and old drainage pipelines under non-closure working condition and construction method thereof - Google Patents

Abstract

A connection structure of new and old drainage pipelines under a non-closure working condition and a construction method thereof comprise an open caisson arranged at the side of the old drainage pipeline needing connection and diversion, a water-stopping curtain arranged at the bottom and the periphery of the open caisson, and water-stopping curtains arranged at the top, the periphery and the bottom of the old drainage pipeline. The invention also comprises a construction method of the new and old drainage pipeline connection structure under the working condition of no interception. The invention has simple process and higher degree of mechanized operation, can ensure the safety of construction and can control the construction period.

Description

Connecting structure of new and old drainage pipelines under non-closure working condition and construction method thereof

Technical Field

The invention relates to the field of connection construction of new and old drainage pipelines, in particular to a connection structure of the new and old drainage pipelines under a non-closure working condition and a construction method thereof.

Background

Because of the urban population constantly increases, old drainage pipe overload operation throughout the year, need shunt, or have new drainage pipe to converge old drainage pipe, because original planning and designing's limitation, often do not reserve the mouth of connecing at old drainage pipe, can face following problem when new and old drainage pipe connects: drainage pipe (especially sewage pipeline) is in the running state throughout the year and can't damps, need connect under the operating mode that does not damps, and the velocity of flow is fast in the pipeline, and personnel directly get into the operation potential safety hazard very big, because of not reserving, connect the mouth also hardly to handle, and drainage pipe buries underground often deeply, adopts open cut method construction degree of difficulty big, the potential safety hazard is big, influences the periphery greatly.

Disclosure of Invention

The invention aims to solve the technical problem of providing a connection structure of a new drainage pipeline and an old drainage pipeline under a non-interception working condition and a construction method thereof.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the invention relates to a connection structure of a new and old drainage pipeline under a non-interception working condition, which comprises an open caisson arranged at the side of the old drainage pipeline needing to be connected and divided, a waterproof curtain arranged at the bottom and the periphery of the open caisson, and waterproof curtains arranged at the top, the periphery and the bottom of the old drainage pipeline, wherein the open caisson and the waterproof curtains are matched to form a main structure of the connection structure; the open caisson has the functions of connecting old drainage pipes and draining the old drainage pipes into new drainage pipes to provide an operation space, and the waterproof curtain has the functions of eliminating the adverse effects of underground water, quicksand and the like on construction, protecting the structures such as the old drainage pipes and the like and preventing the sewage after the connection is successful from leaking outside.

Further, the open caisson is a reinforced concrete polygonal well; the waterproof curtain at the bottom and the periphery of the open caisson is a jet grouting pile waterproof curtain, the waterproof curtain at the top and the periphery of the old drainage pipeline is a jet grouting pile waterproof curtain, and the waterproof curtain at the bottom of the old drainage pipeline is a large-diameter MJS construction pile waterproof curtain.

Furthermore, the distance between the wall of the open caisson and the wall of the old drainage pipeline is 500-800 mm.

Further, the waterproof curtain around the open caisson is 500mm-800mm away from the open caisson.

Furthermore, a connection port with an old drainage pipeline is reserved in the open caisson, and the open caisson is plugged by sand lime bricks before sinking.

Further, peripheral stagnant water curtain and old drainage pipe top of open caisson, peripheral stagnant water curtain adopt double spout pile soon, interlock 200 + -20 mm, and pile bolck elevation is with open caisson top elevation, and pile bottom elevation is than open caisson bottom surface elevation low 5m, the stagnant water curtain of open caisson bottom adopts double spout pile soon, interlock 100 + -10 mm, and pile bolck elevation is with open caisson bottom elevation, and pile bottom elevation is 3m lower than open caisson bottom surface elevation, and the pile diameter is 600mm-800mm, and old drainage pipe department stagnant water curtain treatment scope surpasss the position of plugging into and is no less than 2m, and old drainage pipe bottom stagnant water curtain adopts major diameter (the radius is 1500mm-1800 mm) MJS worker method stake.

The invention relates to a construction method of a new and old drainage pipeline connection structure under a non-interception working condition, which comprises the following steps:

s1: constructing waterproof curtains at the bottom and the periphery of the open caisson and at the top and the periphery of the old drainage pipeline, constructing from the periphery to the middle without parts between the open caisson and the old drainage pipeline, and constructing the parts, such as the bottom of the old drainage pipeline, which are difficult to process by using large-diameter MJS construction method piles;

s2: manufacturing and sinking the open caisson, and connecting a new drainage pipeline with the open caisson;

s3: constructing a waterproof curtain between the open caisson and the old drainage pipeline, wherein the waterproof curtain is occluded with the open caisson and the old drainage pipeline;

s4: breaking the mortar brick wall at the joint of the old drainage pipeline reserved in the open caisson, and manually excavating the earthwork to the wall of the old drainage pipeline;

s5: pouring water into the open caisson until the water level in the open caisson is flush with the water level of the old drainage pipeline;

s6: the manual underwater operation breaks the concrete on the pipe wall of the old drainage pipeline, and the connection of the new and old drainage pipelines is realized.

The connection point for connecting the new and old drainage pipelines is not limited to the old drainage pipelines, and the connection position can be a structure such as an inspection well.

The invention is preferably connected on vertical structures (preferably square structures) such as inspection wells on old drainage pipelines.

The invention preferably adopts the diamond wire saw to cut and break the concrete on the wall of the old drain pipe.

The invention has the beneficial effects that: compared with the prior construction method, the construction method provided by the invention combines engineering practices, adopts the open caisson and the waterproof curtain as the connection conversion space of the new and old drainage pipelines, and adopts the construction method of cutting the pipe wall underwater after water pressure balance, thereby well overcoming the problems of large potential safety hazard, large protection difficulty of the old drainage pipeline, large influence on surrounding traffic, life and environment and the like; meanwhile, the construction process of the jet grouting pile waterproof curtain and the open caisson is mature, simple and reliable, the mechanization degree of the construction process is high, the construction process is safe and environment-friendly, the quality is reliable, and the construction period is controllable; the invention is particularly suitable for projects such as municipal drainage reconstruction and the like.

Drawings

FIG. 1 is a schematic view of an embodiment of a connection structure of new and old drainage pipelines under a non-interception condition according to the present invention;

FIG. 2 is a side view of the embodiment shown in FIG. 1;

in the figure: 1-old drainage pipeline, 2-new drainage pipeline, 3-rotary jet grouting pile constructed before sinking well, 4-old drainage pipeline bottom swing jet grouting, 5-reinforced concrete sinking well, 6-rotary jet grouting pile constructed after sinking well, 7-sinking well cover plate and 8-maintenance well mouth.

Detailed Description

The invention is further explained with reference to the drawings and the embodiments.

Examples

Referring to fig. 1-2, the new and old drainage pipeline connection structure under the non-interception working condition comprises a reinforced concrete open caisson 5 arranged at the side of an old drainage pipeline 1 needing connection and diversion, a rotary jet grouting pile 3 constructed before the bottom of the reinforced concrete open caisson 5 and the peripheral open caisson is manufactured, a rotary jet grouting pile 6 constructed after the open caisson sinks, a rotary jet grouting pile 3 constructed before the top of the old drainage pipeline 1 and the peripheral open caisson is manufactured, and grout 4 laid at the bottom of the old drainage pipeline.

In this embodiment, the reinforced concrete open caisson 5 is a reinforced concrete polygonal well, and the implementation situation can be a regular or irregular polygonal design according to the pipeline trend.

In this embodiment, the distance between the wall of the reinforced concrete open caisson 5 and the wall of the old drainage pipeline 1 is 600 mm.

In the embodiment, the distance between the jet grouting pile 3 constructed before the open caisson around the reinforced concrete open caisson 5 is manufactured and the open caisson is 600 mm.

In the embodiment, the reinforced concrete open caisson 5 is reserved with a connection port with an old drainage pipeline 1, and the open caisson is plugged by sand-lime bricks before sinking.

In the embodiment, the rotary jet grouting piles 3 constructed before the manufacturing of the open caisson at the periphery of the reinforced concrete open caisson 5, the rotary jet grouting piles 6 constructed after the open caisson is sunk, the rotary jet grouting piles 3 constructed before the manufacturing of the open caisson at the periphery and at the top of the old drainage pipeline 1 adopt double-row rotary jet grouting piles, the height of the pile top is 200mm, the height of the pile top is the same as that of the open caisson top, the height of the pile bottom is 5m lower than that of the open caisson bottom, the rotary jet grouting piles 3 constructed before the manufacturing of the open caisson at the bottom of the reinforced concrete open caisson 5 adopt double-row rotary jet grouting piles, the height of the pile top is 100mm, the height of the pile top is the same as that of the open caisson bottom, the height of the pile bottom is 3m lower than that of the open caisson bottom, the pile diameter is 600mm, the processing range of the waterproof curtain at the old drainage.

In this embodiment, the open caisson cover plate 7 and the maintenance wellhead 8 are arranged on the reinforced concrete open caisson 5.

The construction method of the new and old drainage pipeline connection structure under the working condition of no interception comprises the following steps:

s1: constructing the rotary jet grouting piles at the bottom and periphery of the reinforced concrete open caisson 5 and at the top and periphery of the old drainage pipeline 1, constructing from the periphery to the middle without the part between the reinforced concrete open caisson 5 and the old drainage pipeline 1, and constructing the parts, such as the bottom of the old drainage pipeline 1, which are difficult to process by the rotary jet grouting piles by adopting a large-diameter MJS construction method;

s2: manufacturing and sinking the reinforced concrete open caisson 5, and connecting the new drainage pipeline 2 with the reinforced concrete open caisson 5;

s3: constructing a jet grouting pile between the reinforced concrete open caisson 5 and the old drainage pipeline 1, wherein the jet grouting pile is occluded with the reinforced concrete open caisson 5 and the old drainage pipeline 1 by 200 mm;

s4: the method comprises the following steps of (1) breaking ash brick walls of joint openings of old drainage pipelines reserved in the reinforced concrete open caisson 5, and manually excavating earthwork to the pipe wall of the old drainage pipeline 1;

s5: filling water into the reinforced concrete open caisson 5 until the water surface elevation in the reinforced concrete open caisson 5 is flush with the water surface elevation of the old drainage pipeline 1;

s6: the concrete on the pipe wall of the old drainage pipeline 1 is broken through manual underwater operation, and the connection of the new drainage pipeline 2 and the old drainage pipeline 1 is realized.

The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.

Claims (7)

1. The utility model provides a new and old drainage pipe structure of plugging into under the operating mode that does not cut off which characterized in that: the drainage system comprises an open caisson arranged at the side of an old drainage pipeline needing to be plugged and shunted, a waterproof curtain arranged at the bottom and the periphery of the open caisson, and a waterproof curtain arranged at the top, the periphery and the bottom of the old drainage pipeline.

2. The connecting structure of the old and new drainage pipelines under the non-interception working condition according to claim 1, characterized in that: the open caisson is a reinforced concrete polygonal well; the waterproof curtain at the bottom and the periphery of the open caisson is a jet grouting pile waterproof curtain, the waterproof curtain at the top and the periphery of the old drainage pipeline is a jet grouting pile waterproof curtain, and the waterproof curtain at the bottom of the old drainage pipeline is a large-diameter MJS construction pile waterproof curtain.

3. The connecting structure of the old and new drainage pipelines under the non-interception working condition according to claim 1 or 2, characterized in that: the distance between the well wall of the open caisson and the wall of the old drainage pipeline is 500mm-800 mm.

4. The connecting structure of the old and new drainage pipelines under the non-interception working condition according to claim 1 or 2, characterized in that: the distance between the waterproof curtain around the open caisson and the open caisson is 500mm-800 mm.

5. The connecting structure of the old and new drainage pipelines under the non-interception working condition according to claim 1 or 2, characterized in that: the open caisson is reserved with the connection port of the old drainage pipeline, and the open caisson is plugged by sand lime bricks before sinking.

6. The connecting structure of the old and new drainage pipelines under the non-interception working condition according to claim 1 or 2, characterized in that: peripheral stagnant water curtain of open caisson and old drainage pipe top, peripheral stagnant water curtain adopt double spout soon stake, interlock 200 + -20 mm, and pile bolck elevation is with open caisson top elevation, and pile bolck elevation is than the low 5m of open caisson bottom surface elevation, the stagnant water curtain of open caisson bottom adopts double spout soon stake, interlock 100 + -10 mm, and pile bolck elevation is with open caisson bottom elevation, and pile bolck elevation is than the low 3m of open caisson bottom surface elevation, and the pile footpath is 600mm-800mm, and old drainage pipe department stagnant water curtain treatment scope surpasss the position of plugging into and is no less than 2m, and old drainage pipe bottom stagnant water curtain adopts major diameter MJS worker method stake.

7. The construction method of the connecting structure of the old and the new drainage pipelines under the non-interception working condition according to claim 1, characterized by comprising the following steps:

s1: constructing waterproof curtains at the bottom and the periphery of the open caisson and at the top and the periphery of the old drainage pipeline, constructing from the periphery to the middle without parts between the open caisson and the old drainage pipeline, and constructing parts which are difficult to process by the waterproof curtains at the bottom of the old drainage pipeline by adopting large-diameter MJS construction method piles;

s2: manufacturing and sinking the open caisson, and connecting a new drainage pipeline with the open caisson;

s3: constructing a waterproof curtain between the open caisson and the old drainage pipeline, wherein the waterproof curtain is occluded with the open caisson and the old drainage pipeline;

s4: breaking the mortar brick wall of the joint of the old drainage pipeline reserved in the open caisson, and manually excavating the earthwork to the pipe wall of the old drainage pipeline;

s5: pouring water into the open caisson until the water level in the open caisson is flush with the water level of the old drainage pipeline;

s6: the manual underwater operation breaks the concrete on the pipe wall of the old drainage pipeline, and the connection of the new and old drainage pipelines is realized.

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