CN107288172A - One kind, which is twisted, inhales ship sand storage for sand clay separation construction technology - Google Patents

Abstract

Twisted the present invention relates to one kind and inhale ship sand storage for sand clay separation construction technology.Comprise the following steps, the step of (1) analyzes sand source quality and chooses sand storage；(2) the step of selected sand storage outer rim builds interim gear low bank between fields；(3) the step of making sand filter；Sand filter includes straight pipeline and the inclined tube road positioned at straight pipeline bottom, and sand removing hole is provided with the bottom wall of straight pipeline, screen cloth is provided with sand removing hole；(4) sand filter is installed to the step on spoil disposal pipeline；The straight pipeline sections in series of sand filter is connected on spoil disposal pipeline, sand pipeline is sent in the lower end connection in inclined tube road；(5) start dredger and carry out the step of dredging is for sand；(6) end of sand pipeline is being sent to receive the step of screening is for sand.Twisted the invention provides one kind and inhale ship sand storage and separate construction technology for sand clay, realized filtering foreigns such as shell and clay balls, obtain can be with the intact sand utilized, to carry out the filling operation of sand washing bag.

Description

A Construction Technology for Separation of Sand and Clay in Cutter Suction Ship Sand Storage

technical field

The invention belongs to the technical field of dredging construction, and in particular relates to a sand preparation and clay separation construction technology for a sand storehouse of a cutter suction ship.

Background technique

With the continuous development of my country's dredging industry, the degree of specialization of large-scale dredging ships has also increased. In order to save project costs, the number of projects for cutter suction ships to take sand from the seabed to fill sandbags is also increasing. During the process of taking sand from the seabed, sand The influence of dredging source quality and sand layer thickness has also had a great impact on the construction efficiency of cutter suction ships, and the construction efficiency of dredging ships has become a key element to improve project benefits.

In view of the fact that the sand source sand layer contains a large number of shells and other debris, poor sand quality has a great impact on the construction of sand washing bags, resulting in difficulties in the construction of sand washing bags, thin sand layers, and low construction efficiency of cutter suction ships. Because shellfish have poor fluidity and are not easy to transport, mud pump hoses and sand blowing pipelines are frequently blocked during sand filling construction.

At the same time, a filter device is used to filter the sand source to separate the clay shells from the sandy soil to meet the sand quality requirements for filling the sand washing bag. Through reasonable layering, the sandy soil and clay are mixed in the process of sand preparation. It becomes a potential possibility to improve the production efficiency of the cutter suction ship.

Contents of the invention

In order to solve the technical problems existing in the known technology, the present invention provides a sand preparation and clay separation construction process of the cutter suction ship sand storehouse, which realizes the filtration of sundries such as shells and clay balls, and obtains sand that can be used in good condition for washing sand bags. filling work.

The technical scheme adopted by the present invention for solving the technical problems existing in the known technology is: a kind of construction technique of sand preparation and clay separation of cutter suction ship sand storehouse comprises the following steps, (1) the step of analyzing the quality of the sand source and selecting the sand storehouse; 2) The step of building a temporary retaining wall on the outer edge of the selected sand bank; (3) The step of making a sand filter; the sand filter includes a straight pipe and an inclined pipe at the bottom of the straight pipe, and the bottom wall of the straight pipe is set There is a sand discharge port, and a screen is installed on the sand discharge port; (4) The step of installing the sand filter on the mud discharge pipe; connecting the straight pipe part of the sand filter to the mud discharge pipe in series, The lower end is connected to the sand delivery pipeline; (5) the step of starting the dredger to dredge and prepare sand; (6) the step of receiving and screening the sand preparation at the end of the sand delivery pipeline.

The advantages and positive effects of the present invention are: the present invention provides a construction process for separating sand and clay in the sand storage of the cutter suction ship, which realizes the filtration of sundries such as shells and clay balls, and obtains sand that can be used in good condition for sand washing Bag filling work. The reserve of high-quality sand sources is realized at the dredging construction site, and sand preparation can ensure dredging efficiency at the same time.

Preferably: the sand storage in the step (1) includes a main sand storage and a plurality of auxiliary sand storages located around the main sand storage, and the sand preparation construction is carried out alternately between the main sand storage and each auxiliary sand storage.

Preferably: the number of auxiliary sand banks in step (1) is 3-5.

Preferably: the aperture of the screen mesh in step (3) is 12-18mm.

Preferably: the sand filter installed on the mud discharge pipeline in step (4) is provided with at least two stages, that is, at least includes a first-stage sand filter and a second-stage sand filter.

Preferably: in step (5), the cutter suction dredger performs mixed soil excavation, and the mud cutting thickness is set to be 1.2-1.5 times that in the layered excavation condition.

Preferably: in the step (6), a sand blowing nozzle is installed at the end of the sand delivery pipeline, and the sand preparation is directly connected by a sand washing bag.

detailed description

In order to further understand the content of the invention, features and effects of the present invention, the following examples are given in detail as follows:

The sand preparation and clay separation construction technology of the cutter suction ship sand storehouse of the present invention comprises the following steps,

(1) The steps of analyzing the quality of sand source and selecting sand bank; according to the dredging construction topography and the distribution of shell content, analyze the quality of sand source in the area, and select the outer edge area with slightly lower shell content as the sand bank for construction.

In this embodiment, the sand storage in step (1) includes a main sand storage and a plurality of auxiliary sand storages located around the main sand storage, and the construction of sand preparation is carried out alternately between the main sand storage and each auxiliary sand storage. Further, the number of auxiliary sand banks in step (1) is 3-5.

(2) Steps to build a temporary retaining wall on the outer edge of the selected sand bank; in order to reduce the influence of tide water on the outer edge of the sand bank, build temporary sand washing bags on the outer edge of the sand bank (main sand storehouse and auxiliary sand storehouse) It can block the tide and increase the effective time of sand collection.

(3) The step of making the sand filter; the sand filter includes a straight pipe and an inclined pipe at the bottom of the straight pipe, a sand discharge port is provided on the bottom wall of the straight pipe, and a screen is installed on the sand discharge port;

In this embodiment, the processing method of the screen is as follows: Weld a plurality of side-by-side, equidistant round steel bars at the branch nozzle of the original three-way pipeline, that is, the round steel bars are erected at the branch nozzle and Welding fixed.

Further, the aperture of the screen mesh (that is, the distance between two adjacent round steel bars) is 12-18mm, preferably 15mm.

(4) The step of installing the sand filter on the mud discharge pipeline; the straight pipeline part of the sand filter is connected in series on the mud discharge pipeline, and the sand delivery pipeline is connected at the lower end of the inclined pipeline; in the present embodiment, step (4) ) The sand filter installed on the mud discharge pipeline is provided with at least two stages, that is, at least including the first-stage sand filter and the second-stage sand filter.

(5) The step of starting the dredger for dredging and sand preparation; in the present embodiment, the cutter suction dredger carries out the mixed soil excavation in step (5), and the mud cutting thickness is set to be 1.2 under the layered excavation working condition. -1.5 times.

For example, in the case of layered excavation, the thickness of mud cutting is set to 2.0m, and under this construction technology, the thickness of mud cutting can be set to 2.4-3.0m in mixed soil development (ie mixed excavation of clay layer).

(6) The step of receiving, screening and preparing sand at the end of the sand delivery pipeline.

In this embodiment, in step (6), a sand blowing nozzle is installed at the end of the sand delivery pipeline, and the sand preparation is directly picked up by a sand washing bag, and after taking the sand preparation, a bag of equipment sand is obtained, which can be directly used to form a retaining wall Waiting for construction.

Claims (7)

1. A construction technique for sand preparation and clay separation in a cutter suction ship sand storehouse is characterized in that it comprises the following steps, (1) The steps of analyzing the quality of the sand source and selecting the sand bank; (2) Steps for building temporary retaining walls at the outer edge of the selected sand bank; (3) The step of making the sand filter; the sand filter includes a straight pipe and an inclined pipe at the bottom of the straight pipe, a sand discharge port is provided on the bottom wall of the straight pipe, and a screen is installed on the sand discharge port; (4) The step of installing the sand filter on the mud discharge pipeline; connecting the straight pipe part of the sand filter to the mud discharge pipeline in series, and connecting the sand delivery pipeline at the lower end of the inclined pipeline; (5) The step of starting the dredger to carry out dredging and sand preparation; (6) The step of receiving, screening and preparing sand at the end of the sand delivery pipeline. 2. The construction technology for sand preparation and clay separation of the cutter suction ship sand storehouse as claimed in claim 1 is characterized in that: the sand storehouse in the step (1) comprises a main sand storehouse and a plurality of auxiliary sand storehouses positioned around the main sand storehouse, The construction of sand preparation is carried out alternately between the main sand storage and each auxiliary sand storage. 3. The construction process for sand preparation and clay separation of cutter suction ship sand storage as claimed in claim 1, characterized in that: the number of auxiliary sand storages in step (1) is 3-5. 4. The construction process for sand preparation and clay separation of cutter suction ship sand storage as claimed in claim 1, characterized in that: the aperture of the screen mesh in step (3) is 12-18mm. 5. The sand preparation and clay separation construction technology of the cutter suction ship sand storehouse as claimed in claim 1 is characterized in that: the sand filter installed on the mud discharge pipeline in the step (4) is provided with at least two stages, that is, at least includes the first Primary sand filter and secondary sand filter. 6. The sand preparation and clay separation construction process of the cutter suction ship sand storehouse as claimed in claim 1 is characterized in that: in the step (5), the cutter suction dredger carries out mixed soil excavation, and the mud cutting thickness is set to be layered. 1.2-1.5 times that under digging conditions. 7. The sand preparation and clay separation construction process of the cutter suction ship sand storehouse as claimed in claim 1, characterized in that: in step (6), a sand blowing nozzle is installed at the end of the sand delivery pipeline, and the sand preparation is directly picked up by a sand washing bag.