WO2019000503A1

WO2019000503A1 - Super-deep strong drainage consolidation structure of soft soil foundation

Info

Publication number: WO2019000503A1
Application number: PCT/CN2017/093083
Authority: WO
Inventors: 梁永根; 谭作怀; 赵金雪
Original assignee: 广州市万厚投资有限公司
Priority date: 2017-06-28
Filing date: 2017-07-17
Publication date: 2019-01-03
Also published as: CN207003418U; CN107326893A

Abstract

A super-deep strong drainage consolidation structure of a soft soil foundation, comprising a permeable filter pipe (1); the permeable filter pipe (1) is inserted into and reaches to a to-be-treated soft soil layer; a separation piece (2) used for separating the inner cavity of the permeable filter pipe (1) into two parts of an upper part and a lower part is provided in the inner cavity of the permeable filter pipe (1); a pressurized air pipe (3) is positioned outside the permeable filter pipe (1), and the bottom end of the pressurized air pipe (3) communicates with the lower part of the inner cavity of the permeable filter pipe (1); the top end of the pressurized air pipe (3) extends out and is connected to a booster pump; the top end of the permeable filter pipe (1) extends out and is connected to a vacuum pump; the top end of the permeable filter pipe (1) is connected to a water drainage pipe (4) which extends out; under the effect of the vacuum pump, the permeable filter pipe (1) conducts conventional vacuum pumping operation; when the water level in the permeable filter pipe (1) is relatively high, the vacuum pump stops working and meanwhile the booster pump works; pressurization is conducted on the lower part of the inner cavity of the permeable filter pipe (1) through the pressurized air pipe (3) to enable the separation piece (2) to move upwards, so that the water in the upper part of the inner cavity of the permeable filter pipe (1) is extruded and drained outwards through the water drainage pipe (4), so that the water level in the permeable filter pipe (1) is lowered.

Description

Ultra-deep-drain drainage structure for soft soil foundation

Technical field

The invention relates to the technical field of soft soil foundation reinforcement engineering, in particular to an ultra-deep oil drainage consolidation structure of a soft soil foundation.

Background technique

For soft soil foundations, when vacuum preloading or preloading is used for reinforcement, vertical sand wells or drainage boards are generally used as drainage channels in soft soil foundation, and the self-heavy load or vacuum load of the pile is pre-loaded. Drainage consolidation occurs under pressure, pore water pressure is slowly dissipated, effective stress is slowly increased, foundation strength is gradually increased, and most of the ground consolidation settlement is eliminated during the construction period, thereby improving the bearing capacity of the soft soil foundation. .

However, in the existing vacuum preloading construction method, since the water pressure causes the negative pressure transmission to be rapidly reduced, the pressure generated in the deep layer of the soft soil foundation is not much different, and the speed of the drainage consolidation is slow, so that the effective reinforcement depth of the soft soil foundation is shallow.

Summary of the invention

The technical problem to be solved by the invention is to provide an ultra-deep-drainage consolidation structure of a soft soil foundation which is simple in operation and effective in realizing a deep pressure difference in the soft soil foundation, thereby effectively achieving drainage consolidation.

The technical solution adopted to solve the above technical problem: a soft soil-based ultra-deep-drain drainage structure, comprising a permeable filter tube, the permeable filter tube is inserted into a soft soil layer to be treated, and the permeable filter tube inner chamber is provided a partitioning member for separating the inner portion of the permeable filter tube into upper and lower portions, and a pressurized air tube having a bottom end connected to the lower portion of the inner portion of the permeable filter tube is disposed outside the permeable filter tube, and the top end of the pressurized gas tube is extended A booster pump is connected, and a top end of the permeable filter tube is connected to the vacuum pump, and a top drain pipe is connected to the top end of the permeable filter tube.

Further, the partition member forms a sealed connection with the inner wall of the water permeable filter tube.

Further, the water permeable filter tube wall array is distributed with a water permeable channel, and the outer wall of the permeable filter tube is coated with a water permeable filter membrane.

Beneficial effect: In the ultra-deep-drain drainage structure of the soft soil foundation, the permeable filter tube is used for vacuuming under the action of the vacuum pump. When the water level in the permeable filter tube is high, the vacuum pump stops, and the vacuum pump stops working. The booster pump works, and the pressurized gas pipe is partially pressurized to the lower part of the inner portion of the permeable filter tube, so that the partition member moves upward, thereby squeezing the water in the upper portion of the inner portion of the permeable filter tube to the outside through the drain pipe, thereby reducing the permeable filter. The water level in the tube effectively solves the technical problem of vacuum negative pressure transmission loss.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

FIG. 1 is a schematic structural view of an embodiment of the present invention.

Detailed ways

Referring to Fig. 1, a soft soil foundation ultra-deep drainage consolidation structure comprises a water-permeable filter tube 1. The water-permeable filter tube 1 is made of steel pipe, and a water-permeable tunnel 5 is arranged on the wall of the pipe wall and a water-permeable filter is coated on the outer wall. Membrane 6, the water-permeable filter tube 1 is driven into the soft soil layer to be treated, and the inner cavity of the water-permeable filter tube 1 is provided with a partition member 2 movable up and down, and the partition member 2 forms a sealing connection with the inner wall of the water-permeable filter tube 1, and the partition member 2 will The inner chamber of the permeable filter tube 1 is divided into upper and lower portions, and the partition member 2 located in the permeable filter tube 1 is similar to the piston member.

A pressurized air tube 3 is disposed outside the permeable filter tube 1. The bottom end of the pressurized air tube 3 communicates with the lower end portion of the permeable filter tube 1 through the bottom end of the permeable filter tube 1, and the top end of the pressurized air tube 3 Extendingly connected to an external booster pump (not shown), the booster pump operates, and the pressurized airflow is pressurized to the lower portion of the inner portion of the permeable filter tube 1 through the pressurized air tube 3, under the action of the pressurized air flow, the partition member Move up.

The top end of the permeable filter tube 1 is extended to an external vacuum pump (not shown), the vacuum pump operates, and the permeable filter tube 1 performs a conventional vacuuming operation.

The top end of the permeable filter tube 1 is additionally connected to the outwardly extending drain pipe 4, and when the partition member moves upward, the water which is pushed and pushed on the upper portion of the inner portion of the permeable filter tube 1 can be discharged outward through the drain pipe 4.

The specific working process of the ultra-deep-drainage consolidation structure of the soft soil foundation of the present invention is as follows: after the permeable filter pipe 1 is driven into the soft soil layer to be treated, the vacuum pump works, and the permeable filter pipe 1 is subjected to a conventional vacuuming operation, and the vacuum load is pre-charged. Pressed, the soft soil layer to be treated is drained and consolidated, and the generated water enters the upper part of the inner part of the permeable filter tube 1. When the water level in the permeable filter tube 1 is high, the vacuum pump stops, and the vacuum pump stops working. At the same time, the booster pump operates to pressurize the lower portion of the inner portion of the permeable filter tube 1 through the pressurized gas pipe 3, so that the partition member 2 moves upward, thereby squeezing the water in the upper portion of the inner cavity of the permeable filter tube 1. Discharged outward through the drain pipe 4, thereby reducing the water level in the permeable filter tube 1, and then performing a conventional vacuuming operation again to ensure a negative pressure transfer effect.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, and can be made without departing from the spirit of the invention within the scope of the knowledge of those skilled in the art. Various changes.

Claims

An ultra-deep-drainage consolidation structure for a soft soil foundation, comprising: a permeable filter tube, the permeable filter tube is inserted into a soft soil layer to be treated, and the permeable filter tube inner cavity is provided for permeable to the inner surface of the permeable filter tube a partitioning member partitioned into two upper and lower portions, a pressurized air pipe having a bottom end connected to a lower portion of the inner portion of the permeable filter tube and a top end of the pressurized gas pipe extending from the booster pump The top end of the permeable filter tube is connected to the vacuum pump, and the top end of the permeable filter tube is connected with an extended drain pipe.
The soft soil foundation ultra deep water drainage consolidation structure according to claim 1, wherein the partition member forms a sealed connection with the inner wall of the water permeable filter tube.
The ultra-deep-drain drainage structure of the soft soil foundation according to claim 1, wherein the water-permeable filter tube wall array is distributed with a water-permeable passage, and the outer wall of the water-permeable filter tube is coated with a water-permeable filter membrane.