阅读说明：本技术 一种地下管廊施工方法 (Underground pipe gallery construction method ) 是由 王光明 于洋 敖玉连 吴伟 陈晓庭 张凡 于喜飞 于 2021-09-24 设计创作，主要内容包括：本发明公开了一种地下管廊施工方法,包括以下步骤：步骤S1、于干道一侧设置临时道路；步骤S2、于临时道路的另一侧干道路面开挖基坑,并于基坑靠近临时道路的一侧边坡进行支护；步骤S3、于已施工地下管廊的端部设置挡土墙,再对该侧基坑进行回填,而后设置主路基及水稳层,并回复干道主路通行后,转向另一干道侧按照所述步骤S1进行施工；所述步骤S1与步骤S2之间采用盾构施工管廊断面部分土体；所述盾构施工的管廊断面部分土体位于步骤S2开挖基坑的下部。本发明采用明挖与暗挖相结合的方式,避免了明挖法的各种弊端,又提高了基坑的稳固性,有效缩短了地下管廊穿越城市干道时的施工周期,大幅度降低了施工成本,并且改善了地下管廊施工安全。(The invention discloses a construction method of an underground pipe gallery, which comprises the following steps: step S1, arranging a temporary road on one side of the main road; step S2, excavating a foundation pit on the pavement of the main road on the other side of the temporary road, and supporting a side slope on one side of the foundation pit close to the temporary road; step S3, arranging a retaining wall at the end part of the constructed underground pipe gallery, backfilling the side pit, arranging a main roadbed and a water stabilization layer, returning the main road of the main road to pass, and turning to the side of the other main road to construct according to the step S1; a soil body of the section of the shield construction pipe gallery is adopted between the step S1 and the step S2; and the soil body of the section of the pipe gallery in the shield construction is positioned at the lower part of the foundation pit excavated in the step S2. The invention adopts a mode of combining open excavation and underground excavation, avoids various defects of the open excavation method, improves the stability of the foundation pit, effectively shortens the construction period of the underground pipe gallery when passing through the urban trunk road, greatly reduces the construction cost and improves the construction safety of the underground pipe gallery.)

1. A construction method of an underground pipe gallery comprises the following steps:

step S1, arranging a temporary road on one side of the main road, arranging a protective device at the junction of the original road intersection and the construction position of the underground pipe gallery, and arranging a deceleration strip;

step S2, excavating a foundation pit on the road surface of the main road on the other side of the temporary road, and supporting a side slope on one side of the foundation pit close to the temporary road;

step S3, arranging a retaining wall at the end part of the constructed underground pipe gallery, backfilling the side pit, arranging a main roadbed and a water stabilization layer, returning the main road of the main road to pass, and turning to the side of the other main road to construct according to the step S1;

the method is characterized in that: a part of soil body on the section of the pipe gallery is constructed by the shield between the step S1 and the step S2, the shield tunnels along the design line of the pipe gallery, forward thrust is provided on the laid pipe joints through the action of an oil cylinder, the belt is used for discharging slag, and shields are arranged on two sides and at the bottom of the shield tail to prevent surrounding slag soil from entering; and the soil body of the section of the pipe gallery in the shield construction is positioned at the lower part of the foundation pit excavated in the step S2.

2. The underground pipe gallery construction method according to claim 1, characterized in that: the pipe gallery structure adopts prefabricated reinforced concrete pipe joints, the pipe joints are hung and placed in the assembling position through an opening at the rear part of the rectangular shield by an above-ground hoisting device, when the pipe joints are separated from the shield tail after being installed, filling materials are synchronously backfilled at the side part and the bottom of the pipe joints, and after the pipe joints are separated from the shield tail, earthwork backfilling is carried out at the top of the pipe joints.

3. The underground pipe gallery construction method according to claim 2, characterized in that: the shield is an open rectangular shield; the pipe sections adopt prefabricated reinforced concrete pipe sections; after the pipe joints are assembled, backfilling the top with muck; the two sides and the bottom of the shield tail of the open type rectangular shield are provided with shields, and the top of the open type rectangular shield is open and is used for hanging and installing pipe joints; and the retaining plates are inserted into soil bodies above and in front of the shield and serve as temporary supports for open cut construction.

4. A method of constructing an underground pipe gallery according to any one of claims 1 to 3, characterized in that: the size of the shield is designed according to the size of the comprehensive pipe gallery, so that smooth assembly of pipe joints is guaranteed; excavating a soil body through a cutter arranged on the rectangular cutter head; the device is provided with a complete slag discharging system; the top of the shield tail is open, and pipe joints can be hung and assembled; the upper part and the front part of the shield machine body are provided with retaining plates for providing temporary support for the open excavation operation of the upper part and the installation of pipe joints; the shield machine provides jacking force to carry out jacking construction forwards through a hydraulic oil cylinder acting on the pipe joint.

5. The underground pipe gallery construction method according to claim 4, characterized in that: in the step S3, after the side underground pipe gallery is constructed, a retaining wall is disposed at the joint of the side underground pipe gallery and the lower stage pipe gallery construction position, the retaining wall is poured by concrete, and the distance between the retaining wall and the expansion joint is in the range of 550mm to 650 mm.

6. The underground pipe gallery construction method according to claim 5, characterized in that: in the step S2, the foundation pit is excavated in layers, and side slopes on two sides of the foundation pit are supported.

Technical Field

The invention relates to the technical field of pipe gallery construction, in particular to a construction method of an underground pipe gallery.

Background

The city pipe gallery is a tunnel space constructed underground in a city, and various pipelines such as electric power, communication, gas, water supply, heating power, drainage and the like are intensively paved in the tunnel space. In the prior art, the construction of underground pipe gallery is carried out by adopting traditional underground excavation method, i.e. the ground is not excavated, and the construction is carried out by adopting underground excavation. However, because urban main road vehicles come and go frequently, the difficulty of precipitation and unearthing construction in the underground pipe gallery construction process is improved, and large-scale equipment adopted in the construction process can damage foundation pits and soil layers below the main road. The underground excavation method obviously cannot meet new requirements of underground pipe gallery construction on construction period and cost, and cannot reduce the influence on daily life of construction perimeter areas in the construction period.

The invention patent with the prior application publication date of 2019.01.04 and the application publication number of CN109137970A discloses a construction method of a main road underground pipe gallery, which comprises the following steps: step S1, arranging a temporary road on one side of the main road, arranging a protective device at the junction of the original road intersection and the construction position of the underground pipe gallery, and arranging a deceleration strip; step S2, excavating a foundation pit on the pavement of the main road on the other side of the temporary road, and supporting a side slope on one side of the foundation pit close to the temporary road; and step S3, arranging a retaining wall at the end part of the constructed underground pipe gallery, backfilling the side pit, returning the main road of the main road, and turning to the side of the other main road for construction.

The technical scheme that the above-mentioned patent application discloses can keep ground road unblocked when the construction through interim road detour construction position to in the work progress, adopt the mode of strutting in side slope department behind the foundation ditch layering excavation, shortened the construction cycle when underground pipe gallery passes through city main road, reduced construction cost, and improved underground pipe gallery construction safety. However, the open cut method has inevitable defects that large-area excavation and environment destruction have great influence on ground facilities such as traffic, buildings and the like, noise, dust and the like interfere normal working and life of surrounding residents, earth excavation and backfilling occupy a large amount of ground space, precipitation operation is needed under the condition of shallow underground water level, foundation pit support is needed when the buried depth is large, the construction mechanization degree is low, the efficiency is not high, and the construction cost is high under special conditions.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the underground pipe gallery construction method, which solves the technical problem that the existing open cut construction method of the underground pipe gallery has great influence on the construction area environment.

The technical scheme of the invention is realized as follows: a construction method of an underground pipe gallery comprises the following steps:

step S1, arranging a temporary road on one side of the main road, arranging a protective device at the junction of the original road intersection and the construction position of the underground pipe gallery, and arranging a deceleration strip;

step S2, excavating a foundation pit on the road surface of the main road on the other side of the temporary road, and supporting a side slope on one side of the foundation pit close to the temporary road;

step S3, arranging a retaining wall at the end part of the constructed underground pipe gallery, backfilling the side pit, arranging a main roadbed and a water stabilization layer, returning the main road of the main road to pass, and turning to the side of the other main road to construct according to the step S1; a part of soil body on the section of the pipe gallery is constructed by the shield between the step S1 and the step S2, the shield tunnels along the design line of the pipe gallery, forward thrust is provided on the laid pipe joints through the action of an oil cylinder, the belt is used for discharging slag, and shields are arranged on two sides and at the bottom of the shield tail to prevent surrounding slag soil from entering; and the soil body of the section of the pipe gallery in the shield construction is positioned at the lower part of the foundation pit excavated in the step S2.

Furthermore, the pipe gallery structure adopts prefabricated reinforced concrete pipe joints, the pipe joints are hung and placed in the assembly position through an opening at the rear part of the rectangular shield by using an above-ground hoisting device, when the pipe joints are separated from the shield tail after being installed, filling materials are synchronously backfilled at the side parts and the bottom of the pipe joints, and after the pipe joints are separated from the shield tail, earthwork backfilling is carried out at the top parts of the pipe joints.

Further, the shield is an open rectangular shield; the pipe sections adopt prefabricated reinforced concrete pipe sections; after the pipe joints are assembled, backfilling the top with muck; the two sides and the bottom of the shield tail of the open type rectangular shield are provided with shields, and the top of the open type rectangular shield is open and is used for hanging and installing pipe joints; and the retaining plates are inserted into soil bodies above and in front of the shield and serve as temporary supports for open cut construction.

Furthermore, the size of the shield is designed according to the size of the comprehensive pipe gallery, so that the smooth assembly of pipe joints is guaranteed; excavating a soil body through a cutter arranged on the rectangular cutter head; the device is provided with a complete slag discharging system; the top of the shield tail is open, and pipe joints can be hung and assembled; the upper part and the front part of the shield machine body are provided with retaining plates for providing temporary support for the open excavation operation of the upper part and the installation of pipe joints; the shield machine provides jacking force to carry out jacking construction forwards through a hydraulic oil cylinder acting on the pipe joint.

Further, in the step S3, after the side underground pipe gallery is constructed, a retaining wall is disposed at a joint of the side underground pipe gallery and a lower stage pipe gallery construction position, the retaining wall is cast by concrete, and a distance between the retaining wall and the expansion joint is in a range of 550mm to 650 mm.

Further, in step S2, the foundation pit is excavated in layers, and side slopes on two sides of the foundation pit are supported.

The invention adopts a mode of combining open excavation and underground excavation, thereby avoiding the problems that the open excavation method needs large-area excavation and environment destruction, has great influence on ground facilities such as traffic, buildings and the like, causes noise, dust and the like to interfere the normal working life of surrounding residents, occupies a large amount of ground space due to earth excavation and backfilling, needs precipitation operation under the condition of shallow underground water level, needs foundation pit support when the buried depth is large, has low construction mechanization degree, low efficiency and the like. In addition, the temporary road bypasses the construction position, the ground road can be kept smooth during construction, in addition, in the construction process, an underground excavation method in the prior art is replaced, a mode of supporting at the side slope after the foundation pit is excavated in a layered mode is adopted, the stability of the foundation pit is improved, the construction period of the underground pipe gallery when penetrating through the urban trunk road is effectively shortened, the construction cost is greatly reduced, and the construction safety of the underground pipe gallery is improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

A construction method of an underground pipe gallery comprises the following steps:

step S1, arranging a temporary road on one side of the main road, arranging a protective device at the junction of the original road intersection and the underground pipe gallery construction position, and arranging a deceleration strip, wherein the temporary road can be paved by C30 concrete, and the protective device can be a color steel enclosure; the deceleration strip can set up in the protector outside, the deceleration strip can be the sand heap, the width of deceleration strip with the width of full width road is unanimous.

And S2, excavating a foundation pit on the road surface of the main road on the other side of the temporary road, and supporting the side slope on one side of the foundation pit close to the temporary road. And a soil nailing wall can be adopted at the side slope of one side of the foundation pit close to the temporary road for supporting. The foundation pit can be excavated in layers, and side slopes on two sides of the foundation pit can be supported.

And step S3, arranging retaining walls at the end parts of the constructed underground pipe gallery, backfilling the side pits, arranging a main roadbed and a water stabilization layer, returning the main road of the main road to pass, and turning to the side of the other main road to construct according to the step S1. Treat this side underground pipe gallery construction completion back, can set up retaining wall in this side underground pipe gallery and lower stage pipe gallery construction position handing-over department, retaining wall passes through concrete placement, the distance between retaining wall and the expansion joint is in 550mm to 650 mm's within range.

A special process is also arranged between the step S1 and the step S2, namely, a part of soil body on the section of the pipe gallery constructed by the shield is adopted, the shield tunnels along the design line of the pipe gallery, forward thrust is provided on the laid pipe joints through the action of an oil cylinder, the slag is discharged by a belt, and shields are arranged on the two sides and the bottom of the shield tail to prevent surrounding slag from entering; and (4) the soil body of the section of the pipe gallery in the shield construction is positioned at the lower part of the foundation pit excavated in the step S2, namely the lower part adopts the shield construction, and the upper part adopts the open excavation construction.

Furthermore, the pipe gallery structure adopts prefabricated reinforced concrete pipe joints, the pipe joints are hung and placed in the assembly position through an opening at the rear part of the rectangular shield by using an above-ground hoisting device, when the pipe joints are separated from the shield tail after being installed, filling materials are synchronously backfilled at the side parts and the bottom of the pipe joints, and after the pipe joints are separated from the shield tail, earthwork backfilling is carried out at the top parts of the pipe joints.

Further, the shield is an open rectangular shield; the pipe sections adopt prefabricated reinforced concrete pipe sections; after the pipe joints are assembled, backfilling the top with muck; the two sides and the bottom of the shield tail of the open type rectangular shield are provided with shields, and the top of the open type rectangular shield is open and is used for hanging and installing pipe joints; and the retaining plates are inserted into soil bodies above and in front of the shield and serve as temporary supports for open cut construction.

Furthermore, the size of the shield is designed according to the size of the comprehensive pipe gallery, so that the smooth assembly of pipe joints is guaranteed; excavating a soil body through a cutter arranged on the rectangular cutter head; the device is provided with a complete slag discharging system; the top of the shield tail is open, and pipe joints can be hung and assembled; the upper part and the front part of the shield machine body are provided with retaining plates for providing temporary support for the open excavation operation of the upper part and the installation of pipe joints; the shield machine provides jacking force to carry out jacking construction forwards through a hydraulic oil cylinder acting on the pipe joint.

Nothing in this specification is intended to be exhaustive of all conventional and well known techniques.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.