CN102182463A

CN102182463A - Inclined shaft freezing heat insulation method

Info

Publication number: CN102182463A
Application number: CN2011100923342A
Authority: CN
Inventors: 郭永富; 陈占怀; 王永友; 李志清; 赵志福
Original assignee: HANDAN SPECIAL SHAFT SINKING CO Ltd CHINA COAL ENERGY GROUP CO Ltd
Current assignee: HANDAN SPECIAL SHAFT SINKING CO Ltd CHINA COAL ENERGY GROUP CO Ltd
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2011-09-14
Anticipated expiration: 2031-04-12
Also published as: CN102182463B

Abstract

The invention relates to an inclined shaft freezing heat insulation method which comprises the following steps: (1) drilling freezing holes: drilling multiple rows of freezing holes on the ground along the direction of an inclined shaft, wherein each hole penetrates through the shaft bottom plate for 4-6m; constructing 1-2 rows of freezing holes at the two sides of the inclined shaft to be excavated respectively, and constructing 1-4 rows of freezing holes penetrating through a shaft section; and (2) mounting freezing pipes: sequentially welding and placing a lower freezing pipe, a lower joint, a heat insulation pipe, a middle joint, an upper freezing pipe, an upper joint and a non-freezing pipe, wherein the heat insulation pipe is installed in place when located at the shaft position of the inclined shaft to be excavated. The method can effectively solve the shortcoming that the shaft section is frozen as well, and is easy for construction.

Description

Inclined shaft freezes heat preserving method

Technical field

The present invention relates to a kind of heat preserving method that freezes of inclined shaft.

Background technology

The principle that inclined shaft freezes is identical with vertical; promptly utilize Refrigeration Technique; with wait to excavate underground space surrounding soil water congeals into ice and with soil body gluing together; form the frozen soil enclosure wall of adhere to specification and have a certain intensity and a thickness or the frozen soil body of sealing; in order to opposing soil pressure and isolated underground water; under the protection of frost wall, carry out a kind of ground special construction method of underground engineering construction.

At present, the construction technology that inclined shaft freezes is with the existing similarity of the vertical frozen construction technology part of having any different again, resemblance is: all adopt ground to beat the constructure scheme of upright opening, different is that inclined shaft freezes to adopt subsection hole-drilling step freezing technology, key is: the 1. difference of cloth well format, vertical freezes the requirement according to the frost wall design thickness, and a circle or a multi-turn freezing hole is set around pit shaft; And inclined shaft is to move towards the many rows of construction freezing hole along pit shaft.2. form the form difference of frost wall, vertical freezes because be cloth hole around pit shaft, and frost wall forms a sealing, fluid-tight cylinder around pit shaft, and the inclined shaft frost wall is to form a cuboid in the shaft section scope.3. the effect difference of freezing, vertical frost wall form the back can guarantee that in the suitable time frozen soil does not enter the waste footpath of pit shaft, thereby makes shaft excavation construction " digging the sugared heart ", guarantees shaft construction speed; And inclined shaft freeze will be according to the shaft excavation width, 1～3 row's freezing hole needs pass through from shaft section, as not taking the partial insulation technology, shaft section also all freezes reality, not only consumes a large amount of energy, also brings great difficulty to tunneling construction simultaneously.

Summary of the invention

In order to overcome the shortcoming of prior art, the invention provides a kind of inclined shaft and freeze heat preserving method, can solve shaft section effectively and also be frozen real shortcoming, be easy to construction.

1., bore freezing hole 1 the present invention includes the following step:, diameter is a Φ 171-190 millimeter: waiting to dig drill with ferrule five row's freezing holes 1 on the inclined shaft, wherein wait to dig each 1 row of pit shaft both sides of inclined shaft, pass freezing hole 3 rows of shaft section, the degree of depth of each freezing hole 1 surpasses the degree of depth 4-6 rice of place shaft location, as shown in Figure 1, 2; 2., freezing pipe is installed: at first following freezing pipe 8; The upper end welding lower contact 7 of following freezing pipe 8, the upper end welding insulating tube 6 of lower contact 7; The upper end weldering center tap 5 of insulating tube 6, freezing pipe 4 is gone up in the upper end welding of center tap 5; The upper end welding top connection 3 of last freezing pipe 4, non-freezing pipe 2 is welded in the upper end of top connection 3; When insulating tube 6 is in when waiting to dig the shaft location of inclined shaft, promptly be in place.

The diameter of described non-freezing pipe and insulating tube is littler than the freezing pipe of freeze section.

The length of described insulating tube is suitable with the pit shaft height of waiting to dig inclined shaft.

The present invention can solve shaft section effectively and also be frozen real shortcoming, is easy to construction, shortens the construction period greatly.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a front view of the present invention;

Fig. 2 is a vertical view of the present invention;

Fig. 3 is a freezing pipe schematic diagram of the present invention.

The specific embodiment

Wait to dig the borehole size of inclined shaft: width is 6.6 meters, highly is 5.4 meters.

Comprise the following steps: 1., bore freezing hole 1, diameter is a Φ 171-190 millimeter: waiting to dig drill with ferrule five row's freezing holes 1 on the inclined shaft, wherein wait to dig each 1 row of pit shaft both sides of inclined shaft, pass freezing hole 3 rows of shaft section, the degree of depth of each freezing hole 1 surpasses the degree of depth 4-6 rice of place shaft location, as shown in Figure 1, 2; 2., freezing pipe is installed: at first following freezing pipe 8; The upper end welding lower contact 7 of following freezing pipe 8, the upper end welding insulating tube 6 of lower contact 7; The upper end welding center tap 5 of insulating tube 6, freezing pipe 4 is gone up in the upper end welding of center tap 5; The upper end welding top connection 3 of last freezing pipe 4, non-freezing pipe 2 is welded in the upper end of top connection 3; When insulating tube 6 is in when waiting to dig the shaft location of inclined shaft, promptly be in place.

The diameter of described non-freezing pipe 2 and insulating tube 6 is 89 millimeters of Φ, and wall thickness is 5 millimeters.The length of insulating tube is 5.4 meters.

The length of described upper and lower freezing pipe is 4-6 rice, and diameter is 133 millimeters.

Claims

1. an inclined shaft freezes heat preserving method, it is characterized in that: comprise the following steps: 1., bore freezing hole (1), diameter is a Φ 171-190 millimeter: waiting to dig drill with ferrule five row's freezing holes (1) on the inclined shaft, wherein wait to dig each 1 row of pit shaft both sides of inclined shaft, pass freezing hole 3 rows of shaft section, the degree of depth of each freezing hole (1) surpasses the degree of depth 4-6 rice of place shaft location; 2., freezing pipe is installed: underlying freezing pipe (8) at first; The upper end welding lower contact (7) of following freezing pipe (8), the upper end welding insulating tube (6) of lower contact (7); The upper end welding center tap (5) of insulating tube (6), freezing pipe (4) is gone up in the upper end welding of center tap (5); The upper end welding top connection (3) of last freezing pipe (4), non-freezing pipe (2) is welded in the upper end of top connection (3); When insulating tube (6) is in when waiting to dig the shaft location of inclined shaft, promptly be in place.

2. inclined shaft according to claim 1 freezes heat preserving method, it is characterized in that: the diameter of described non-freezing pipe (2) and insulating tube (6) is littler than upper and lower freezing pipe (4,8).

3. inclined shaft according to claim 1 freezes heat preserving method, it is characterized in that: the described length that goes up freezing pipe (4) is 5-8 rice, and the length of following freezing pipe (8) is 4-6 rice; The length of insulating tube (6) is suitable with the pit shaft height of waiting to dig inclined shaft.