H-shaped steel and Larsen steel sheet pile combined cofferdam

Abstract

The H-shaped steel and Larsen steel sheet pile combined cofferdam is reliable in connection, easy and convenient to construct and high in construction safety. The connecting structure comprises Larsen steel sheet piles, split bolts and a steel waist beam, the Larsen steel sheet piles are arranged on the two sides of the cofferdam, and the Larsen steel sheet piles on the same side are sequentially connected together. The steel waist beams are arranged on the two sides of the cofferdam and fixedly installed on the upper portions of the Larsen steel sheet piles, and the row of Larsen steel sheet piles on the same side are connected in series and fixed together. The split bolts are connected with the steel waist beams, and the steel waist beams on the two sides are fixed together. The device is characterized by further comprising a TC lock catch and H-shaped steel, the H-shaped steel is vertically arranged on the two sides of the cofferdam, the upper portion of the H-shaped steel is installed on the steel waist beam through the TC lock catch, and the bottom of the H-shaped steel extends downwards and exceeds the bottom of the Larsen steel sheet pile 1.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of H-shaped steel and larsen steel sheet pile combined cofferdams. BACKGROUND

[0002] Larsen steel sheet pile cofferdam is a kind of cofferdam form commonly used in river, generally using two rows of larsen steel sheet pile as cofferdam main body, middle is filled with clay and compacted, then the cofferdam whole is formed by using pull bolt to tie on both sides larsen steel sheet pile.The cofferdam whole has good integrity.But for soft soil geological conditions, especially deep silt soft soil layer geological conditions, due to the length limit of larsen steel sheet pile, there is not enough insertion depth or cofferdam whole rotation slip caused by not penetrating soft soil layer.In the construction of Hangzhou subway, this situation has occurred, causing very serious safety hazard.

[0003] In order to solve the above problems, the applicant applies for Chinese patent with patent number 202023135569.9, which solves the problem of larsen steel sheet pile cofferdam whole rotation slip in soft soil area, and increases the stability and safety of cofferdam.The utility model includes larsen steel sheet pile, clay filling layer, pull bolt and steel waist beam;Larsen steel sheet pile is arranged on both sides of cofferdam, and larsen steel sheet pile in the same side is arranged in sequence;Clay filling layer is arranged in the middle of both sides of larsen steel sheet pile;Steel waist beam is arranged on both sides of cofferdam, and is fixedly installed on the upper part of larsen steel sheet pile, so as to connect and fix one row of larsen steel sheet pile on the same side;Pull bolt is connected with steel waist beam, so as to fix both sides of steel waist beam;Its characterized in that: it further includes hoop and steel pipe pile;Hoop is installed on steel waist beam;The steel pipe pile is vertically arranged on both sides of cofferdam, and the upper part is fixed on the hoop, and the bottom part extends downward and exceeds the bottom part of larsen steel sheet pile.

[0004] However, the cofferdam combined with steel pipe pile and larsen steel sheet pile has the following shortcomings:

[0005] 1、The connection strength and reliability of steel pipe pile and larsen steel sheet pile are low;

[0006] 2、The connection of steel pipe pile and larsen steel sheet pile needs to be bound and welded on site through hoop, and the construction speed is slow;

[0007] 3、The connection of steel pipe pile and larsen steel sheet pile needs construction personnel to enter the river inside for construction, and the safety risk is high. UTILITY MODEL CONTENTS

[0008] The utility model aims at overcoming the above-mentioned deficiencies in the prior art, and provides a kind of H-shaped steel and larsen steel sheet pile combined cofferdam with reasonable structure design, reliable connection, simple construction and strong construction safety.

[0009] The utility model discloses a technical scheme that solves the above problems is: a kind of H-shaped steel and larsen steel sheet pile combined cofferdam, including larsen steel sheet pile, opposite pull bolt and steel waist beam;Larsen steel sheet pile is arranged at the both sides of cofferdam, and larsen steel sheet pile in the same side is connected in turn together;Steel waist beam is arranged at the both sides of cofferdam, and fixedly installed in the upper portion of larsen steel sheet pile, and one row of larsen steel sheet pile in the same side is fixed together in series;Opposite pull bolt is connected with steel waist beam, and the steel waist beam of both sides is fixed together;Its characterized in that: still include TC lock and H-shaped steel;H-shaped steel is vertically arranged at the both sides of cofferdam, and its upper portion is installed on steel waist beam through TC lock, and bottom extends downwards and exceeds the bottom of larsen steel sheet pile.

[0010] The utility model discloses TC lock mainly consists of T type department and C type department, and T type department is vertically fixed on H-shaped steel, and C type department is vertically fixed on steel waist beam, and T type department and C type department are clamped and fixed.

[0011] The utility model discloses H-shaped steel is multiple, and H-shaped steel in the same side is arranged in turn, and is arranged at certain distance interval.

[0012] The utility model also includes clay filling layer, and clay filling layer is filled between the larsen steel sheet pile of the both sides of cofferdam.

[0013] The utility model discloses larsen steel sheet pile is SP-IV type larsen steel sheet pile.

[0014] Compared with prior art, the utility model has following advantages and effect:

[0015] 1、structure design is reasonable, and the ability of the anti rotation slip of cofferdam is increased by the combination of longer H-shaped steel and general length larsen steel sheet pile, and the problem of the overall rotation slip of larsen steel sheet pile cofferdam in soft soil area is solved, and the stability safety of cofferdam is increased;

[0016] 2, H-shaped steel replaces steel pipe pile, and has following advantages:

[0017] 1), the connection (plane and plane connection) of H-shaped steel and larsen steel sheet pile is more than the structural strength of steel pipe pile and larsen steel sheet station (circular and plane connection), and the reliability is higher;

[0018] 2), construction is more simple, and the binding, welding of steel pipe pile and larsen steel sheet pile is not needed in site, and the construction speed is accelerated;

[0019] 3, the TC lock buckle is adopted between the H-shaped steel and the steel waist beam, compared with the hoop connection of the steel pipe pile and the larsen steel sheet pile combined cofferdam in the prior art, the TC lock buckle connection interface is reliable, the construction is simple, the construction safety is strong, the binding and welding of the steel pipe pile and the larsen steel sheet pile in the river channel do not need personnel, the personnel accident risk is reduced, the construction convenience and the worker safety are greatly increased. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of a front view cross-section structure of the embodiment of the utility model.

[0021] Figure 2 It is a schematic view of a plane structure of the embodiment of the utility model.

[0022] Figure 3 It is a schematic view of a partial structure. Figure 1 DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail by combining with the drawings and through the embodiment, the following embodiment is the explanation of the utility model, and the utility model is not limited to the following embodiment.

[0024] The utility model discloses larsen steel sheet pile 1, clay filling layer 2, counter bolt 3, steel waist beam 4, TC lock buckle 5 and H-shaped steel 6.

[0025] Larsen steel sheet pile 1 is arranged at the both sides of cofferdam, and the larsen steel sheet pile 1 in the same side is connected in turn.

[0026] H-shaped steel 6 is vertically arranged at the both sides of cofferdam, and the upper portion is installed on steel waist beam 4 through TC lock buckle 5, and the bottom portion extends downwards and exceeds the bottom portion of larsen steel sheet pile 1.

[0027] H-shaped steel 6 is multiple, and the H-shaped steel 6 in the same side is arranged in turn and is arranged at a certain distance.

[0028] ​Furthermore, it needs to explain, the specific embodiment described in this specification, the shape of zero, component, the name taken etc. can be different, the above-mentioned in this specification is merely an example of the structure of the utility model is made. The equivalent change or simple change made according to the structure, features and principles described in the utility model patent concept, all are included in the protection scope of the utility model patent. The person skilled in the art to which the utility model belongs can make various modifications or supplements or adopt similar ways to replace the specific embodiments described, as long as it does not deviate from the structure of the utility model or beyond the range defined in the claims, it should belong to the protection scope of the utility model.

Claims

1. A cofferdam composed of H-beams and Larssen sheet piles, comprising Larssen sheet piles, tie bolts, and steel waist beams; the Larssen sheet piles are arranged on both sides of the cofferdam, with the Larssen sheet piles on the same side connected together in sequence; the steel waist beams are arranged on both sides of the cofferdam and fixedly installed on the upper part of the Larssen sheet piles, connecting and fixing a row of Larssen sheet piles on the same side together; the tie bolts are connected to the steel waist beams, fixing the steel waist beams on both sides together; characterized in that: The TC lock and the H-shaped steel are further included; the H-shaped steel is vertically arranged on both sides of the cofferdam, the upper part of the H-shaped steel is installed on the steel waist beam through the TC lock, and the bottom part extends downward and exceeds the bottom part of the Larsen steel sheet pile.

2. The H-beam and Lassen steel sheet pile combined cofferdam according to claim 1, characterized in that: The TC lock is composed of a T-shaped part and a C-shaped part, the T-shaped part is vertically fixed on the H-shaped steel, the C-shaped part is vertically fixed on the steel waist beam, and the T-shaped part and the C-shaped part are clamped and fixed.

3. The H-beam and Lassen steel sheet pile combined cofferdam according to claim 1, characterized in that: The H-shaped steel is multiple, the H-shaped steels in the same side are sequentially arranged and arranged at a certain distance.

4. The H-beam and Lassen steel sheet pile combined cofferdam according to claim 1, characterized in that: The clay filling layer is further included, and the clay filling layer is filled between the Larsen steel sheet piles on both sides of the cofferdam.

5. The H-beam and Lassen steel sheet pile combined cofferdam according to claim 1, characterized in that: The Larsen steel sheet pile is an SP-IV Larsen steel sheet pile.

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